Snap for 10453563 from 72852e8c2a7cefa7fccb30178de813752c9c7bf7 to mainline-os-statsd-release
Change-Id: Ife65fa3d7a4cffc7065398b827f1b094bac1b087
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..39a013b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+TRACEEVENT-CFLAGS
+libtraceevent-dynamic-list
+libtraceevent.so.*
+.pc
+patches
+*.o
+build_prefix
+build_uninstall
+*~
+\#*\#
+.#*
+*.cmd
+*.so
+.*.d
+ep_version.h
+libtraceevent.pc
+lib/
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..649e64a
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,53 @@
+package {
+ default_applicable_licenses: ["external_libtraceevent_license"],
+}
+
+// See: http://go/android-license-faq
+license {
+ name: "external_libtraceevent_license",
+
+ visibility: [":__subpackages__"],
+
+ license_kinds: [
+ "SPDX-license-identifier-GPL-2.0",
+ "SPDX-license-identifier-GPL-2.0-only",
+ "SPDX-license-identifier-GPL-2.0+",
+ "SPDX-license-identifier-GPL-2.0-or-later",
+ "SPDX-license-identifier-LGPL-2.1",
+ "SPDX-license-identifier-LGPL-2.1+",
+ ],
+
+ license_text: [
+ "LICENSE",
+ ],
+}
+
+cc_library {
+ name: "libtraceevent",
+
+ // Restrict visibility due to GPL license
+ visibility: [
+ "//external/libtracefs:__subpackages__",
+ "//external/trace-cmd:__subpackages__",
+ ],
+
+ local_include_dirs: [
+ "include/traceevent",
+ "include",
+ "src",
+ ],
+
+ export_include_dirs: [
+ "include/traceevent",
+ ],
+
+ srcs: ["src/*.c"],
+
+ cflags: [
+ "-D_GNU_SOURCE",
+ "-Wno-unused-parameter",
+ "-Wno-pointer-arith",
+ ],
+
+ c_std: "gnu99",
+}
diff --git a/Documentation/.gitignore b/Documentation/.gitignore
new file mode 100644
index 0000000..bdc8252
--- /dev/null
+++ b/Documentation/.gitignore
@@ -0,0 +1,3 @@
+*.m
+*.3
+*.html
diff --git a/Documentation/Makefile b/Documentation/Makefile
new file mode 100644
index 0000000..39f2be4
--- /dev/null
+++ b/Documentation/Makefile
@@ -0,0 +1,221 @@
+include ../scripts/utilities.mak
+include ../scripts/utils.mk
+
+# This Makefile and manpage XSL files were taken from tools/perf/Documentation
+# and modified for libtraceevent.
+
+MAN3_TXT= \
+ $(wildcard libtraceevent-*.txt) \
+ libtraceevent.txt
+
+MAN_TXT = $(MAN3_TXT)
+_MAN_XML=$(patsubst %.txt,%.xml,$(MAN_TXT))
+_MAN_HTML=$(patsubst %.txt,%.html,$(MAN_TXT))
+_DOC_MAN3=$(patsubst %.txt,%.m,$(MAN3_TXT))
+
+OUTPUT := $(obj)/Documentation/
+
+MAN_XML=$(addprefix $(OUTPUT),$(_MAN_XML))
+MAN_HTML=$(addprefix $(OUTPUT),$(_MAN_HTML))
+DOC_MAN3=$(addprefix $(OUTPUT),$(_DOC_MAN3))
+
+# Make the path relative to DESTDIR, not prefix
+ifndef DESTDIR
+prefix?=$(HOME)
+endif
+bindir?=$(prefix)/bin
+htmldir?=$(prefix)/share/doc/libtraceevent-doc
+pdfdir?=$(prefix)/share/doc/libtraceevent-doc
+mandir?=$(prefix)/share/man
+man3dir=$(mandir)/man3
+
+ASCIIDOC=asciidoc
+ASCIIDOC_EXTRA = --unsafe -f asciidoc.conf
+ASCIIDOC_HTML = xhtml11
+MANPAGE_XSL = manpage-normal.xsl
+XMLTO_EXTRA =
+INSTALL?=install
+RM ?= rm -f
+
+ifdef USE_ASCIIDOCTOR
+ASCIIDOC = asciidoctor
+ASCIIDOC_EXTRA = -a compat-mode
+ASCIIDOC_EXTRA += -I. -rasciidoctor-extensions
+ASCIIDOC_EXTRA += -a mansource="libtraceevent" -a manmanual="libtraceevent Manual"
+ASCIIDOC_HTML = xhtml5
+endif
+
+XMLTO=xmlto
+
+_tmp_tool_path := $(call get-executable,$(ASCIIDOC))
+ifeq ($(_tmp_tool_path),)
+ missing_tools = $(ASCIIDOC)
+endif
+
+ifndef USE_ASCIIDOCTOR
+_tmp_tool_path := $(call get-executable,$(XMLTO))
+ifeq ($(_tmp_tool_path),)
+ missing_tools += $(XMLTO)
+endif
+endif
+
+#
+# For asciidoc ...
+# -7.1.2, no extra settings are needed.
+# 8.0-, set ASCIIDOC8.
+#
+
+#
+# For docbook-xsl ...
+# -1.68.1, set ASCIIDOC_NO_ROFF? (based on changelog from 1.73.0)
+# 1.69.0, no extra settings are needed?
+# 1.69.1-1.71.0, set DOCBOOK_SUPPRESS_SP?
+# 1.71.1, no extra settings are needed?
+# 1.72.0, set DOCBOOK_XSL_172.
+# 1.73.0-, set ASCIIDOC_NO_ROFF
+#
+
+#
+# If you had been using DOCBOOK_XSL_172 in an attempt to get rid
+# of 'the ".ft C" problem' in your generated manpages, and you
+# instead ended up with weird characters around callouts, try
+# using ASCIIDOC_NO_ROFF instead (it works fine with ASCIIDOC8).
+#
+
+ifdef ASCIIDOC8
+ASCIIDOC_EXTRA += -a asciidoc7compatible
+endif
+ifdef DOCBOOK_XSL_172
+ASCIIDOC_EXTRA += -a libtraceevent-asciidoc-no-roff
+MANPAGE_XSL = manpage-1.72.xsl
+else
+ ifdef ASCIIDOC_NO_ROFF
+ # docbook-xsl after 1.72 needs the regular XSL, but will not
+ # pass-thru raw roff codes from asciidoc.conf, so turn them off.
+ ASCIIDOC_EXTRA += -a libtraceevent-asciidoc-no-roff
+ endif
+endif
+ifdef MAN_BOLD_LITERAL
+XMLTO_EXTRA += -m manpage-bold-literal.xsl
+endif
+ifdef DOCBOOK_SUPPRESS_SP
+XMLTO_EXTRA += -m manpage-suppress-sp.xsl
+endif
+
+SHELL_PATH ?= $(SHELL)
+# Shell quote;
+SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+
+DESTDIR ?=
+DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
+
+export DESTDIR DESTDIR_SQ
+
+#
+# Please note that there is a minor bug in asciidoc.
+# The version after 6.0.3 _will_ include the patch found here:
+# http://marc.theaimsgroup.com/?l=libtraceevent&m=111558757202243&w=2
+#
+# Until that version is released you may have to apply the patch
+# yourself - yes, all 6 characters of it!
+#
+QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
+QUIET_SUBDIR1 =
+
+ifneq ($(findstring $(MAKEFLAGS),w),w)
+PRINT_DIR = --no-print-directory
+else # "make -w"
+NO_SUBDIR = :
+endif
+
+ifneq ($(findstring $(MAKEFLAGS),s),s)
+ifneq ($(V),1)
+ QUIET_ASCIIDOC = @echo ' ASCIIDOC '$@;
+ QUIET_XMLTO = @echo ' XMLTO '$@;
+ QUIET_SUBDIR0 = +@subdir=
+ QUIET_SUBDIR1 = ;$(NO_SUBDIR) \
+ echo ' SUBDIR ' $$subdir; \
+ $(MAKE) $(PRINT_DIR) -C $$subdir
+ export V
+endif
+endif
+
+all: html man
+
+man: man3
+man3: $(DOC_MAN3)
+
+html: $(MAN_HTML)
+
+$(MAN_HTML) $(DOC_MAN3): asciidoc.conf
+
+install: install-man install-html
+
+check-man-tools:
+ifdef missing_tools
+ $(error "You need to install $(missing_tools) for man pages")
+endif
+
+$(OUTPUT)install-%.3: $(OUTPUT)%.3
+ $(Q)$(call do_install,$<,$(man3dir),644)
+
+do-install-man: man $(patsubst $(OUTPUT)%,$(OUTPUT)install-%,$(wildcard $(OUTPUT)*.3))
+
+install-man: check-man-tools man
+ $(Q)$(MAKE) -C . do-install-man
+
+install-%.txt: $(OUTPUT)%.html
+ $(Q)$(call do_install,$<,$(htmldir),644)
+
+do-install-html: html $(addprefix install-,$(wildcard *.txt))
+
+install-html: check-man-tools html do-install-html
+
+uninstall: uninstall-man uninstall-html
+
+uninstall-man:
+ $(call QUIET_UNINST, Documentation-man) \
+ $(Q)$(RM) $(addprefix $(DESTDIR)$(man3dir)/,$(DOC_MAN3))
+
+uninstall-html:
+ $(call QUIET_UNINST, Documentation-html) \
+ $(Q)$(RM) $(addprefix $(DESTDIR)$(htmldir)/,$(MAN_HTML))
+
+ifdef missing_tools
+ DO_INSTALL_MAN = $(warning Please install $(missing_tools) to have the man pages installed)
+else
+ DO_INSTALL_MAN = do-install-man
+endif
+
+CLEAN_FILES = \
+ $(MAN_XML) $(addsuffix +,$(MAN_XML)) \
+ $(MAN_HTML) $(addsuffix +,$(MAN_HTML)) \
+ $(DOC_MAN3) $(OUTPUT)*.3 $(OUTPUT)*.m
+
+clean:
+ $(call QUIET_CLEAN, Documentation) $(RM) $(CLEAN_FILES)
+
+ifdef USE_ASCIIDOCTOR
+$(OUTPUT)%.3 : $(OUTPUT)%.txt
+ $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+ $(ASCIIDOC) -b manpage -d manpage \
+ $(ASCIIDOC_EXTRA) -alibtraceevent_version=$(EVENT_PARSE_VERSION) -o $@+ $< && \
+ mv $@+ $@
+endif
+
+$(OUTPUT)%.m : $(OUTPUT)%.xml
+ $(QUIET_XMLTO)$(RM) $@ && \
+ $(XMLTO) -o $(OUTPUT). -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<; \
+ touch $@
+
+$(OUTPUT)%.xml : %.txt
+ $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+ $(ASCIIDOC) -b docbook -d manpage \
+ $(ASCIIDOC_EXTRA) -alibtraceevent_version=$(EVENT_PARSE_VERSION) -o $@+ $< && \
+ mv $@+ $@
+
+$(MAN_HTML): $(OUTPUT)%.html : %.txt
+ $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+ $(ASCIIDOC) -b $(ASCIIDOC_HTML) -d manpage \
+ $(ASCIIDOC_EXTRA) -alibtraceevent_version=$(EVENT_PARSE_VERSION) -o $@+ $< && \
+ mv $@+ $@
diff --git a/Documentation/asciidoc.conf b/Documentation/asciidoc.conf
new file mode 100644
index 0000000..0759571
--- /dev/null
+++ b/Documentation/asciidoc.conf
@@ -0,0 +1,120 @@
+## linktep: macro
+#
+# Usage: linktep:command[manpage-section]
+#
+# Note, {0} is the manpage section, while {target} is the command.
+#
+# Show TEP link as: <command>(<section>); if section is defined, else just show
+# the command.
+
+[macros]
+(?su)[\\]?(?P<name>linktep):(?P<target>\S*?)\[(?P<attrlist>.*?)\]=
+
+[attributes]
+asterisk=*
+plus=+
+caret=^
+startsb=[
+endsb=]
+tilde=~
+
+ifdef::backend-docbook[]
+[linktep-inlinemacro]
+{0%{target}}
+{0#<citerefentry>}
+{0#<refentrytitle>{target}</refentrytitle><manvolnum>{0}</manvolnum>}
+{0#</citerefentry>}
+endif::backend-docbook[]
+
+ifdef::backend-docbook[]
+ifndef::tep-asciidoc-no-roff[]
+# "unbreak" docbook-xsl v1.68 for manpages. v1.69 works with or without this.
+# v1.72 breaks with this because it replaces dots not in roff requests.
+[listingblock]
+<example><title>{title}</title>
+<literallayout>
+ifdef::doctype-manpage[]
+ .ft C
+endif::doctype-manpage[]
+|
+ifdef::doctype-manpage[]
+ .ft
+endif::doctype-manpage[]
+</literallayout>
+{title#}</example>
+endif::tep-asciidoc-no-roff[]
+
+ifdef::tep-asciidoc-no-roff[]
+ifdef::doctype-manpage[]
+# The following two small workarounds insert a simple paragraph after screen
+[listingblock]
+<example><title>{title}</title>
+<literallayout>
+|
+</literallayout><simpara></simpara>
+{title#}</example>
+
+[verseblock]
+<formalpara{id? id="{id}"}><title>{title}</title><para>
+{title%}<literallayout{id? id="{id}"}>
+{title#}<literallayout>
+|
+</literallayout>
+{title#}</para></formalpara>
+{title%}<simpara></simpara>
+endif::doctype-manpage[]
+endif::tep-asciidoc-no-roff[]
+endif::backend-docbook[]
+
+ifdef::doctype-manpage[]
+ifdef::backend-docbook[]
+[header]
+template::[header-declarations]
+<refentry>
+<refmeta>
+<refentrytitle>{mantitle}</refentrytitle>
+<manvolnum>{manvolnum}</manvolnum>
+<refmiscinfo class="source">libtraceevent</refmiscinfo>
+<refmiscinfo class="version">{libtraceevent_version}</refmiscinfo>
+<refmiscinfo class="manual">libtraceevent Manual</refmiscinfo>
+</refmeta>
+<refnamediv>
+ <refname>{manname1}</refname>
+ <refname>{manname2}</refname>
+ <refname>{manname3}</refname>
+ <refname>{manname4}</refname>
+ <refname>{manname5}</refname>
+ <refname>{manname6}</refname>
+ <refname>{manname7}</refname>
+ <refname>{manname8}</refname>
+ <refname>{manname9}</refname>
+ <refname>{manname10}</refname>
+ <refname>{manname11}</refname>
+ <refname>{manname12}</refname>
+ <refname>{manname13}</refname>
+ <refname>{manname14}</refname>
+ <refname>{manname15}</refname>
+ <refname>{manname16}</refname>
+ <refname>{manname17}</refname>
+ <refname>{manname18}</refname>
+ <refname>{manname19}</refname>
+ <refname>{manname20}</refname>
+ <refname>{manname21}</refname>
+ <refname>{manname22}</refname>
+ <refname>{manname23}</refname>
+ <refname>{manname24}</refname>
+ <refname>{manname25}</refname>
+ <refname>{manname26}</refname>
+ <refname>{manname27}</refname>
+ <refname>{manname28}</refname>
+ <refname>{manname29}</refname>
+ <refname>{manname30}</refname>
+ <refpurpose>{manpurpose}</refpurpose>
+</refnamediv>
+endif::backend-docbook[]
+endif::doctype-manpage[]
+
+ifdef::backend-xhtml11[]
+[linktep-inlinemacro]
+<a href="{target}.html">{target}{0?({0})}</a>
+endif::backend-xhtml11[]
diff --git a/Documentation/libtraceevent-commands.txt b/Documentation/libtraceevent-commands.txt
new file mode 100644
index 0000000..cea3001
--- /dev/null
+++ b/Documentation/libtraceevent-commands.txt
@@ -0,0 +1,153 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_register_comm, tep_override_comm, tep_is_pid_registered,
+tep_data_comm_from_pid, tep_data_pid_from_comm, tep_cmdline_pid -
+Manage pid to process name mappings.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_register_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
+int *tep_override_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
+bool *tep_is_pid_registered*(struct tep_handle pass:[*]_tep_, int _pid_);
+const char pass:[*]*tep_data_comm_from_pid*(struct tep_handle pass:[*]_pevent_, int _pid_);
+struct cmdline pass:[*]*tep_data_pid_from_comm*(struct tep_handle pass:[*]_pevent_, const char pass:[*]_comm_, struct cmdline pass:[*]_next_);
+int *tep_cmdline_pid*(struct tep_handle pass:[*]_pevent_, struct cmdline pass:[*]_cmdline_);
+--
+
+DESCRIPTION
+-----------
+These functions can be used to handle the mapping between pid and process name.
+The library builds a cache of these mappings, which is used to display the name
+of the process, instead of its pid. This information can be retrieved from
+tracefs/saved_cmdlines file.
+
+The *tep_register_comm()* function registers a _pid_ / process name mapping.
+If a command with the same _pid_ is already registered, an error is returned.
+The _pid_ argument is the process ID, the _comm_ argument is the process name,
+_tep_ is the event context. The _comm_ is duplicated internally.
+
+The *tep_override_comm()* function registers a _pid_ / process name mapping.
+If a process with the same pid is already registered, the process name string is
+udapted with the new one. The _pid_ argument is the process ID, the _comm_
+argument is the process name, _tep_ is the event context. The _comm_ is
+duplicated internally.
+
+The *tep_is_pid_registered()* function checks if a pid has a process name
+mapping registered. The _pid_ argument is the process ID, _tep_ is the event
+context.
+
+The *tep_data_comm_from_pid()* function returns the process name for a given
+pid. The _pid_ argument is the process ID, _tep_ is the event context.
+The returned string should not be freed, but will be freed when the _tep_
+handler is closed.
+
+The *tep_data_pid_from_comm()* function returns a pid for a given process name.
+The _comm_ argument is the process name, _tep_ is the event context.
+The argument _next_ is the cmdline structure to search for the next pid.
+As there may be more than one pid for a given process, the result of this call
+can be passed back into a recurring call in the _next_ parameter, to search for
+the next pid. If _next_ is NULL, it will return the first pid associated with
+the _comm_. The function performs a linear search, so it may be slow.
+
+The *tep_cmdline_pid()* function returns the pid associated with a given
+_cmdline_. The _tep_ argument is the event context.
+
+RETURN VALUE
+------------
+*tep_register_comm()* function returns 0 on success. In case of an error -1 is
+returned and errno is set to indicate the cause of the problem: ENOMEM, if there
+is not enough memory to duplicate the _comm_ or EEXIST if a mapping for this
+_pid_ is already registered.
+
+*tep_override_comm()* function returns 0 on success. In case of an error -1 is
+returned and errno is set to indicate the cause of the problem: ENOMEM, if there
+is not enough memory to duplicate the _comm_.
+
+*tep_is_pid_registered()* function returns true if the _pid_ has a process name
+mapped to it, false otherwise.
+
+*tep_data_comm_from_pid()* function returns the process name as string, or the
+string "<...>" if there is no mapping for the given pid.
+
+*tep_data_pid_from_comm()* function returns a pointer to a struct cmdline, that
+holds a pid for a given process, or NULL if none is found. This result can be
+passed back into a recurring call as the _next_ parameter of the function.
+
+*tep_cmdline_pid()* functions returns the pid for the give cmdline. If _cmdline_
+ is NULL, then -1 is returned.
+
+EXAMPLE
+-------
+The following example registers pid for command "ls", in context of event _tep_
+and performs various searches for pid / process name mappings:
+[source,c]
+--
+#include <event-parse.h>
+...
+int ret;
+int ls_pid = 1021;
+struct tep_handle *tep = tep_alloc();
+...
+ ret = tep_register_comm(tep, "ls", ls_pid);
+ if (ret != 0 && errno == EEXIST)
+ ret = tep_override_comm(tep, "ls", ls_pid);
+ if (ret != 0) {
+ /* Failed to register pid / command mapping */
+ }
+...
+ if (tep_is_pid_registered(tep, ls_pid) == 0) {
+ /* Command mapping for ls_pid is not registered */
+ }
+...
+ const char *comm = tep_data_comm_from_pid(tep, ls_pid);
+ if (comm) {
+ /* Found process name for ls_pid */
+ }
+...
+ int pid;
+ struct cmdline *cmd = tep_data_pid_from_comm(tep, "ls", NULL);
+ while (cmd) {
+ pid = tep_cmdline_pid(tep, cmd);
+ /* Found pid for process "ls" */
+ cmd = tep_data_pid_from_comm(tep, "ls", cmd);
+ }
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-cpus.txt b/Documentation/libtraceevent-cpus.txt
new file mode 100644
index 0000000..aff4223
--- /dev/null
+++ b/Documentation/libtraceevent-cpus.txt
@@ -0,0 +1,77 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_get_cpus, tep_set_cpus - Get / set the number of CPUs, which have a tracing
+buffer representing it. Note, the buffer may be empty.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_get_cpus*(struct tep_handle pass:[*]_tep_);
+void *tep_set_cpus*(struct tep_handle pass:[*]_tep_, int _cpus_);
+--
+
+DESCRIPTION
+-----------
+The *tep_get_cpus()* function gets the number of CPUs, which have a tracing
+buffer representing it. The _tep_ argument is trace event parser context.
+
+The *tep_set_cpus()* function sets the number of CPUs, which have a tracing
+buffer representing it. The _tep_ argument is trace event parser context.
+The _cpu_ argument is the number of CPUs with tracing data.
+
+RETURN VALUE
+------------
+The *tep_get_cpus()* functions returns the number of CPUs, which have tracing
+data recorded.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+ tep_set_cpus(tep, 5);
+...
+ printf("We have tracing data for %d CPUs", tep_get_cpus(tep));
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-debug.txt b/Documentation/libtraceevent-debug.txt
new file mode 100644
index 0000000..ff1d06d
--- /dev/null
+++ b/Documentation/libtraceevent-debug.txt
@@ -0,0 +1,95 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_print_printk, tep_print_funcs, tep_set_test_filters, tep_plugin_print_options -
+Print libtraceevent internal information.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+*#include <trace-seq.h>*
+
+void *tep_print_printk*(struct tep_handle pass:[*]tep);
+void *tep_print_funcs*(struct tep_handle pass:[*]tep);
+void *tep_set_test_filters*(struct tep_handle pass:[*]tep, int test_filters);
+void *tep_plugin_print_options*(struct trace_seq pass:[*]s);
+--
+
+DESCRIPTION
+-----------
+The *tep_print_printk()* function prints the printk string formats that were
+stored for this tracing session. The _tep_ argument is trace event parser context.
+
+The *tep_print_funcs()* function prints the stored function name to address mapping
+for this tracing session. The _tep_ argument is trace event parser context.
+
+The *tep_set_test_filters()* function sets a flag to test a filter string. If this
+flag is set, when *tep_filter_add_filter_str()* API as called, it will print the filter
+string instead of adding it. The _tep_ argument is trace event parser context.
+The _test_filters_ argument is the test flag that will be set.
+
+The *tep_plugin_print_options()* function writes a list of the registered plugin options
+into _s_.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+ tep_print_printk(tep);
+...
+ tep_print_funcs(tep);
+...
+struct tep_event_filter *filter = tep_filter_alloc(tep);
+ tep_set_test_filters(tep, 1);
+ tep_filter_add_filter_str(filter, "sched/sched_wakeup:target_cpu==1");
+ tep_set_test_filters(tep, 0);
+ tep_filter_free(filter);
+...
+struct trace_seq seq;
+trace_seq_init(&seq);
+
+ tep_plugin_print_options(&s);
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-endian_read.txt b/Documentation/libtraceevent-endian_read.txt
new file mode 100644
index 0000000..372d52a
--- /dev/null
+++ b/Documentation/libtraceevent-endian_read.txt
@@ -0,0 +1,78 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_read_number - Reads a number from raw data.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_);
+--
+
+DESCRIPTION
+-----------
+The *tep_read_number()* function reads an integer from raw data, taking into
+account the endianness of the raw data and the current host. The _tep_ argument
+is the trace event parser context. The _ptr_ is a pointer to the raw data, where
+the integer is, and the _size_ is the size of the integer.
+
+RETURN VALUE
+------------
+The *tep_read_number()* function returns the integer in the byte order of
+the current host. In case of an error, 0 is returned.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+void process_record(struct tep_record *record)
+{
+ int offset = 24;
+ int data = tep_read_number(tep, record->data + offset, 4);
+
+ /* Read the 4 bytes at the offset 24 of data as an integer */
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-event_find.txt b/Documentation/libtraceevent-event_find.txt
new file mode 100644
index 0000000..56d76b1
--- /dev/null
+++ b/Documentation/libtraceevent-event_find.txt
@@ -0,0 +1,103 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_find_event,tep_find_event_by_name,tep_find_event_by_record -
+Find events by given key.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_event pass:[*]*tep_find_event*(struct tep_handle pass:[*]_tep_, int _id_);
+struct tep_event pass:[*]*tep_find_event_by_name*(struct tep_handle pass:[*]_tep_, const char pass:[*]_sys_, const char pass:[*]_name_);
+struct tep_event pass:[*]*tep_find_event_by_record*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_record_);
+--
+
+DESCRIPTION
+-----------
+This set of functions can be used to search for an event, based on a given
+criteria. All functions require a pointer to a _tep_, trace event parser
+context.
+
+The *tep_find_event()* function searches for an event by given event _id_. The
+event ID is assigned dynamically and can be viewed in event's format file,
+"ID" field.
+
+The *tep_find_event_by_name()* function searches for an event by given
+event _name_, under the system _sys_. If the _sys_ is NULL (not specified),
+the first event with _name_ is returned.
+
+The tep_find_event_by_record()* function searches for an event from a given
+_record_.
+
+RETURN VALUE
+------------
+All these functions return a pointer to the found event, or NULL if there is no
+such event.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+struct tep_event *event;
+
+event = tep_find_event(tep, 1857);
+if (event == NULL) {
+ /* There is no event with ID 1857 */
+}
+
+event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
+if (event == NULL) {
+ /* There is no kvm_exit event, from kvm system */
+}
+
+void event_from_record(struct tep_record *record)
+{
+ struct tep_event *event = tep_find_event_by_record(tep, record);
+ if (event == NULL) {
+ /* There is no event from given record */
+ }
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-event_get.txt b/Documentation/libtraceevent-event_get.txt
new file mode 100644
index 0000000..488f176
--- /dev/null
+++ b/Documentation/libtraceevent-event_get.txt
@@ -0,0 +1,99 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_get_event, tep_get_first_event, tep_get_events_count - Access events.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_event pass:[*]*tep_get_event*(struct tep_handle pass:[*]_tep_, int _index_);
+struct tep_event pass:[*]*tep_get_first_event*(struct tep_handle pass:[*]_tep_);
+int *tep_get_events_count*(struct tep_handle pass:[*]_tep_);
+--
+
+DESCRIPTION
+-----------
+The *tep_get_event()* function returns a pointer to event at the given _index_.
+The _tep_ argument is trace event parser context, the _index_ is the index of
+the requested event.
+
+The *tep_get_first_event()* function returns a pointer to the first event.
+As events are stored in an array, this function returns the pointer to the
+beginning of the array. The _tep_ argument is trace event parser context.
+
+The *tep_get_events_count()* function returns the number of the events
+in the array. The _tep_ argument is trace event parser context.
+
+RETURN VALUE
+------------
+The *tep_get_event()* returns a pointer to the event located at _index_.
+NULL is returned in case of error, in case there are no events or _index_ is
+out of range.
+
+The *tep_get_first_event()* returns a pointer to the first event. NULL is
+returned in case of error, or in case there are no events.
+
+The *tep_get_events_count()* returns the number of the events. 0 is
+returned in case of error, or in case there are no events.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+int i,count = tep_get_events_count(tep);
+struct tep_event *event, *events = tep_get_first_event(tep);
+
+if (events == NULL) {
+ /* There are no events */
+} else {
+ for (i = 0; i < count; i++) {
+ event = (events+i);
+ /* process events[i] */
+ }
+
+ /* Get the last event */
+ event = tep_get_event(tep, count-1);
+}
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-event_list.txt b/Documentation/libtraceevent-event_list.txt
new file mode 100644
index 0000000..a958b18
--- /dev/null
+++ b/Documentation/libtraceevent-event_list.txt
@@ -0,0 +1,122 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_list_events, tep_list_events_copy -
+Get list of events, sorted by given criteria.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_event_sort_type* {
+ _TEP_EVENT_SORT_ID_,
+ _TEP_EVENT_SORT_NAME_,
+ _TEP_EVENT_SORT_SYSTEM_,
+};
+
+struct tep_event pass:[*]pass:[*]*tep_list_events*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
+struct tep_event pass:[*]pass:[*]*tep_list_events_copy*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
+--
+
+DESCRIPTION
+-----------
+The *tep_list_events()* function returns an array of pointers to the events,
+sorted by the _sort_type_ criteria. The last element of the array is NULL.
+The returned memory must not be freed, it is managed by the library.
+The function is not thread safe. The _tep_ argument is trace event parser
+context. The _sort_type_ argument is the required sort criteria:
+[verse]
+--
+ _TEP_EVENT_SORT_ID_ - sort by the event ID.
+ _TEP_EVENT_SORT_NAME_ - sort by the event (name, system, id) triplet.
+ _TEP_EVENT_SORT_SYSTEM_ - sort by the event (system, name, id) triplet.
+--
+
+The *tep_list_events_copy()* is a thread safe version of _tep_list_events()_.
+It has the same behavior, but the returned array is allocated internally and
+must be freed by the caller. Note that the content of the array must not be
+freed (see the EXAMPLE below).
+
+RETURN VALUE
+------------
+The *tep_list_events()* function returns an array of pointers to events.
+In case of an error, NULL is returned. The returned array must not be freed,
+it is managed by the library.
+
+The *tep_list_events_copy()* function returns an array of pointers to events.
+In case of an error, NULL is returned. The returned array must be freed by
+the caller.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+int i;
+struct tep_event_format **events;
+
+i=0;
+events = tep_list_events(tep, TEP_EVENT_SORT_ID);
+if (events == NULL) {
+ /* Failed to get the events, sorted by ID */
+} else {
+ while(events[i]) {
+ /* walk through the list of the events, sorted by ID */
+ i++;
+ }
+}
+
+i=0;
+events = tep_list_events_copy(tep, TEP_EVENT_SORT_NAME);
+if (events == NULL) {
+ /* Failed to get the events, sorted by name */
+} else {
+ while(events[i]) {
+ /* walk through the list of the events, sorted by name */
+ i++;
+ }
+ free(events);
+}
+
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-event_print.txt b/Documentation/libtraceevent-event_print.txt
new file mode 100644
index 0000000..6a5946a
--- /dev/null
+++ b/Documentation/libtraceevent-event_print.txt
@@ -0,0 +1,130 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_print_event - Writes event information into a trace sequence.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+*#include <trace-seq.h>*
+
+void *tep_print_event*(struct tep_handle pass:[*]_tep_, struct trace_seqpass:[*]_s_, struct tep_record pass:[*]_record_, const char pass:[*]_fmt_, _..._)
+--
+
+DESCRIPTION
+-----------
+
+The *tep_print_event()* function parses the event information of the given
+_record_ and writes it into the trace sequence _s_, according to the format
+string _fmt_. The desired information is specified after the format string.
+The _fmt_ is printf-like format string, following arguments are supported:
+[verse]
+--
+ TEP_PRINT_PID, "%d" - PID of the event.
+ TEP_PRINT_CPU, "%d" - Event CPU.
+ TEP_PRINT_COMM, "%s" - Event command string.
+ TEP_PRINT_NAME, "%s" - Event name.
+ TEP_PRINT_LATENCY, "%s" - Latency of the event. It prints 4 or more
+ fields - interrupt state, scheduling state,
+ current context, and preemption count.
+ Field 1 is the interrupt enabled state:
+ d : Interrupts are disabled
+ . : Interrupts are enabled
+ X : The architecture does not support this
+ information
+ Field 2 is the "need resched" state.
+ N : The task is set to call the scheduler when
+ possible, as another higher priority task
+ may need to be scheduled in.
+ . : The task is not set to call the scheduler.
+ Field 3 is the context state.
+ . : Normal context
+ s : Soft interrupt context
+ h : Hard interrupt context
+ H : Hard interrupt context which triggered
+ during soft interrupt context.
+ z : NMI context
+ Z : NMI context which triggered during hard
+ interrupt context
+ Field 4 is the preemption count.
+ . : The preempt count is zero.
+ On preemptible kernels (where the task can be scheduled
+ out in arbitrary locations while in kernel context), the
+ preempt count, when non zero, will prevent the kernel
+ from scheduling out the current task. The preempt count
+ number is displayed when it is not zero.
+ Depending on the kernel, it may show other fields
+ (lock depth, or migration disabled, which are unique to
+ specialized kernels).
+ TEP_PRINT_TIME, %d - event time stamp. A divisor and precision can be
+ specified as part of this format string:
+ "%precision.divisord". Example:
+ "%3.1000d" - divide the time by 1000 and print the first
+ 3 digits before the dot. Thus, the time stamp
+ "123456000" will be printed as "123.456"
+ TEP_PRINT_INFO, "%s" - event information.
+ TEP_PRINT_INFO_RAW, "%s" - event information, in raw format.
+
+--
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct trace_seq seq;
+trace_seq_init(&seq);
+struct tep_handle *tep = tep_alloc();
+...
+void print_my_event(struct tep_record *record)
+{
+ trace_seq_reset(&seq);
+ tep_print_event(tep, s, record, "%16s-%-5d [%03d] %s %6.1000d %s %s",
+ TEP_PRINT_COMM, TEP_PRINT_PID, TEP_PRINT_CPU,
+ TEP_PRINT_LATENCY, TEP_PRINT_TIME, TEP_PRINT_NAME,
+ TEP_PRINT_INFO);
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences related APIs.
+ Trace sequences are used to allow a function to call several other functions
+ to create a string of data to use.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-field_find.txt b/Documentation/libtraceevent-field_find.txt
new file mode 100644
index 0000000..5e4071c
--- /dev/null
+++ b/Documentation/libtraceevent-field_find.txt
@@ -0,0 +1,118 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_find_common_field, tep_find_field, tep_find_any_field -
+Search for a field in an event.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_format_field pass:[*]*tep_find_common_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
+struct tep_format_field pass:[*]*tep_find_field*(struct tep_event_ormat pass:[*]_event_, const char pass:[*]_name_);
+struct tep_format_field pass:[*]*tep_find_any_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
+--
+
+DESCRIPTION
+-----------
+These functions search for a field with given name in an event. The field
+returned can be used to find the field content from within a data record.
+
+The *tep_find_common_field()* function searches for a common field with _name_
+in the _event_.
+
+The *tep_find_field()* function searches for an event specific field with
+_name_ in the _event_.
+
+The *tep_find_any_field()* function searches for any field with _name_ in the
+_event_.
+
+RETURN VALUE
+------------
+The _tep_find_common_field(), *tep_find_field()* and _tep_find_any_field()_
+functions return a pointer to the found field, or NULL in case there is no field
+with the requested name.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+void get_htimer_info(struct tep_handle *tep, struct tep_record *record)
+{
+ struct tep_format_field *field;
+ struct tep_event *event;
+ long long softexpires;
+ int mode;
+ int pid;
+
+ event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
+
+ field = tep_find_common_field(event, "common_pid");
+ if (field == NULL) {
+ /* Cannot find "common_pid" field in the event */
+ } else {
+ /* Get pid from the data record */
+ pid = tep_read_number(tep, record->data + field->offset,
+ field->size);
+ }
+
+ field = tep_find_field(event, "softexpires");
+ if (field == NULL) {
+ /* Cannot find "softexpires" event specific field in the event */
+ } else {
+ /* Get softexpires parameter from the data record */
+ softexpires = tep_read_number(tep, record->data + field->offset,
+ field->size);
+ }
+
+ field = tep_find_any_field(event, "mode");
+ if (field == NULL) {
+ /* Cannot find "mode" field in the event */
+ } else
+ {
+ /* Get mode parameter from the data record */
+ mode = tep_read_number(tep, record->data + field->offset,
+ field->size);
+ }
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-field_get_val.txt b/Documentation/libtraceevent-field_get_val.txt
new file mode 100644
index 0000000..6a5f1cd
--- /dev/null
+++ b/Documentation/libtraceevent-field_get_val.txt
@@ -0,0 +1,122 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_get_any_field_val, tep_get_common_field_val, tep_get_field_val,
+tep_get_field_raw - Get value of a field.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+*#include <trace-seq.h>*
+
+int *tep_get_any_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
+int *tep_get_common_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
+int *tep_get_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
+void pass:[*]*tep_get_field_raw*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int pass:[*]_len_, int _err_);
+--
+
+DESCRIPTION
+-----------
+These functions can be used to find a field and retrieve its value.
+
+The *tep_get_any_field_val()* function searches in the _record_ for a field
+with _name_, part of the _event_. If the field is found, its value is stored in
+_val_. If there is an error and _err_ is not zero, then an error string is
+written into _s_.
+
+The *tep_get_common_field_val()* function does the same as
+*tep_get_any_field_val()*, but searches only in the common fields. This works
+for any event as all events include the common fields.
+
+The *tep_get_field_val()* function does the same as *tep_get_any_field_val()*,
+but searches only in the event specific fields.
+
+The *tep_get_field_raw()* function searches in the _record_ for a field with
+_name_, part of the _event_. If the field is found, a pointer to where the field
+exists in the record's raw data is returned. The size of the data is stored in
+_len_. If there is an error and _err_ is not zero, then an error string is
+written into _s_.
+
+RETURN VALUE
+------------
+The *tep_get_any_field_val()*, *tep_get_common_field_val()* and
+*tep_get_field_val()* functions return 0 on success, or -1 in case of an error.
+
+The *tep_get_field_raw()* function returns a pointer to field's raw data, and
+places the length of this data in _len_. In case of an error NULL is returned.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+struct tep_event *event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
+...
+void process_record(struct tep_record *record)
+{
+ int len;
+ char *comm;
+ struct tep_event *event;
+ unsigned long long val;
+
+ event = tep_find_event_by_record(tep, record);
+ if (event != NULL) {
+ if (tep_get_common_field_val(NULL, event, "common_type",
+ record, &val, 0) == 0) {
+ /* Got the value of common type field */
+ }
+ if (tep_get_field_val(NULL, event, "pid", record, &val, 0) == 0) {
+ /* Got the value of pid specific field */
+ }
+ comm = tep_get_field_raw(NULL, event, "comm", record, &len, 0);
+ if (comm != NULL) {
+ /* Got a pointer to the comm event specific field */
+ }
+ }
+}
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences
+ related APIs. Trace sequences are used to allow a function to call
+ several other functions to create a string of data to use.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-field_print.txt b/Documentation/libtraceevent-field_print.txt
new file mode 100644
index 0000000..3844fd1
--- /dev/null
+++ b/Documentation/libtraceevent-field_print.txt
@@ -0,0 +1,135 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_print_field_content, tep_print_fields, tep_print_num_field, tep_print_func_field, tep_record_print_fields, tep_record_print_selected_fields -
+Print the field content.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+*#include <trace-seq.h>*
+
+void *tep_print_field_content*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int size, struct tep_format_field pass:[*]_field_);
+void *tep_print_fields*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int _size_, struct tep_event pass:[*]_event_);
+int *tep_print_num_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
+int *tep_print_func_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
+void *tep_record_print_fields*(struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, struct tep_event pass:[*]_event_);
+void *tep_record_print_selected_fields*(struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, struct tep_event pass:[*]_event_, int _select_mask_);
+--
+
+DESCRIPTION
+-----------
+These functions print recorded field's data, according to the field's type.
+
+The *tep_print_field_content()* function extracts from the recorded raw _data_ value of
+the _field_ and prints it into _s_, according to the field type.
+
+The *tep_print_fields()* prints each field name followed by the record's field
+value according to the field's type:
+[verse]
+--
+"field1_name=field1_value field2_name=field2_value ..."
+--
+It iterates all fields of the _event_, and calls *tep_print_field_content()* for each of
+them.
+
+The *tep_print_num_field()* function prints a numeric field with given format
+string. A search is performed in the _event_ for a field with _name_. If such
+field is found, its value is extracted from the _record_ and is printed in the
+_s_, according to the given format string _fmt_. If the argument _err_ is
+non-zero, and an error occures - it is printed in the _s_.
+
+The *tep_print_func_field()* function prints a function field with given format
+string. A search is performed in the _event_ for a field with _name_. If such
+field is found, its value is extracted from the _record_. The value is assumed
+to be a function address, and a search is perform to find the name of this
+function. The function name (if found) and its address are printed in the _s_,
+according to the given format string _fmt_. If the argument _err_ is non-zero,
+and an error occures - it is printed in _s_.
+
+The *tep_record_print_fields()* prints the field's name followed by its value
+for all record's field.
+
+The *tep_record_print_selected_fields()* prints the field's name followed by
+its value for selected subset of record field. The fields to be printed are
+defined by the _select_mask_ bit mask.
+
+RETURN VALUE
+------------
+The *tep_print_num_field()* and *tep_print_func_field()* functions return 1
+on success, -1 in case of an error or 0 if the print buffer _s_ is full.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+struct trace_seq seq;
+trace_seq_init(&seq);
+struct tep_event *event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
+...
+void process_record(struct tep_record *record)
+{
+ struct tep_format_field *field_pid = tep_find_common_field(event, "common_pid");
+
+ trace_seq_reset(&seq);
+
+ /* Print the value of "common_pid" */
+ tep_print_field_content(&seq, record->data, record->size, field_pid);
+
+ /* Print all fields of the "hrtimer_start" event */
+ tep_print_fields(&seq, record->data, record->size, event);
+
+ /* Print the value of "expires" field with custom format string */
+ tep_print_num_field(&seq, " timer expires in %llu ", event, "expires", record, 0);
+
+ /* Print the address and the name of "function" field with custom format string */
+ tep_print_func_field(&seq, " timer function is %s ", event, "function", record, 0);
+ }
+ ...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences related APIs.
+ Trace sequences are used to allow a function to call several other functions
+ to create a string of data to use.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-field_read.txt b/Documentation/libtraceevent-field_read.txt
new file mode 100644
index 0000000..cc322fb
--- /dev/null
+++ b/Documentation/libtraceevent-field_read.txt
@@ -0,0 +1,81 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_read_number_field - Reads a number from raw data.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_read_number_field*(struct tep_format_field pass:[*]_field_, const void pass:[*]_data_, unsigned long long pass:[*]_value_);
+--
+
+DESCRIPTION
+-----------
+The *tep_read_number_field()* function reads the value of the _field_ from the
+raw _data_ and stores it in the _value_. The function sets the _value_ according
+to the endianness of the raw data and the current machine and stores it in
+_value_.
+
+RETURN VALUE
+------------
+The *tep_read_number_field()* function retunrs 0 in case of success, or -1 in
+case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+struct tep_event *event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
+...
+void process_record(struct tep_record *record)
+{
+ unsigned long long pid;
+ struct tep_format_field *field_pid = tep_find_common_field(event, "common_pid");
+
+ if (tep_read_number_field(field_pid, record->data, &pid) != 0) {
+ /* Failed to get "common_pid" value */
+ }
+}
+...
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-fields.txt b/Documentation/libtraceevent-fields.txt
new file mode 100644
index 0000000..99b302f
--- /dev/null
+++ b/Documentation/libtraceevent-fields.txt
@@ -0,0 +1,105 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_event_common_fields, tep_event_fields - Get a list of fields for an event.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_format_field pass:[*]pass:[*]*tep_event_common_fields*(struct tep_event pass:[*]_event_);
+struct tep_format_field pass:[*]pass:[*]*tep_event_fields*(struct tep_event pass:[*]_event_);
+--
+
+DESCRIPTION
+-----------
+The *tep_event_common_fields()* function returns an array of pointers to common
+fields for the _event_. The array is allocated in the function and must be freed
+by free(). The last element of the array is NULL.
+
+The *tep_event_fields()* function returns an array of pointers to event specific
+fields for the _event_. The array is allocated in the function and must be freed
+by free(). The last element of the array is NULL.
+
+RETURN VALUE
+------------
+Both *tep_event_common_fields()* and *tep_event_fields()* functions return
+an array of pointers to tep_format_field structures in case of success, or
+NULL in case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+int i;
+struct tep_format_field **fields;
+struct tep_event *event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
+if (event != NULL) {
+ fields = tep_event_common_fields(event);
+ if (fields != NULL) {
+ i = 0;
+ while (fields[i]) {
+ /*
+ walk through the list of the common fields
+ of the kvm_exit event
+ */
+ i++;
+ }
+ free(fields);
+ }
+ fields = tep_event_fields(event);
+ if (fields != NULL) {
+ i = 0;
+ while (fields[i]) {
+ /*
+ walk through the list of the event specific
+ fields of the kvm_exit event
+ */
+ i++;
+ }
+ free(fields);
+ }
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-file_endian.txt b/Documentation/libtraceevent-file_endian.txt
new file mode 100644
index 0000000..4d13227
--- /dev/null
+++ b/Documentation/libtraceevent-file_endian.txt
@@ -0,0 +1,91 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_is_file_bigendian, tep_set_file_bigendian - Get / set the endianness of the
+raw data being accessed by the tep handler.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_endian* {
+ TEP_LITTLE_ENDIAN = 0,
+ TEP_BIG_ENDIAN
+};
+
+bool *tep_is_file_bigendian*(struct tep_handle pass:[*]_tep_);
+void *tep_set_file_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
+
+--
+DESCRIPTION
+-----------
+The *tep_is_file_bigendian()* function gets the endianness of the raw data,
+being accessed by the tep handler. The _tep_ argument is trace event parser
+context.
+
+The *tep_set_file_bigendian()* function sets the endianness of raw data being
+accessed by the tep handler. The _tep_ argument is trace event parser context.
+[verse]
+--
+The _endian_ argument is the endianness:
+ _TEP_LITTLE_ENDIAN_ - the raw data is in little endian format,
+ _TEP_BIG_ENDIAN_ - the raw data is in big endian format.
+--
+RETURN VALUE
+------------
+The *tep_is_file_bigendian()* function returns true if the data is in bigendian
+format, false otherwise.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+ tep_set_file_bigendian(tep, TEP_LITTLE_ENDIAN);
+...
+ if (tep_is_file_bigendian(tep)) {
+ /* The raw data is in big endian */
+ } else {
+ /* The raw data is in little endian */
+ }
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-filter.txt b/Documentation/libtraceevent-filter.txt
new file mode 100644
index 0000000..f3eacf6
--- /dev/null
+++ b/Documentation/libtraceevent-filter.txt
@@ -0,0 +1,209 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_filter_alloc, tep_filter_free, tep_filter_reset, tep_filter_make_string,
+tep_filter_copy, tep_filter_compare, tep_filter_match, tep_event_filtered,
+tep_filter_remove_event, tep_filter_strerror, tep_filter_add_filter_str -
+Event filter related APIs.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_event_filter pass:[*]*tep_filter_alloc*(struct tep_handle pass:[*]_tep_);
+void *tep_filter_free*(struct tep_event_filter pass:[*]_filter_);
+void *tep_filter_reset*(struct tep_event_filter pass:[*]_filter_);
+enum tep_errno *tep_filter_add_filter_str*(struct tep_event_filter pass:[*]_filter_, const char pass:[*]_filter_str_);
+int *tep_event_filtered*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
+int *tep_filter_remove_event*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
+enum tep_errno *tep_filter_match*(struct tep_event_filter pass:[*]_filter_, struct tep_record pass:[*]_record_);
+int *tep_filter_copy*(struct tep_event_filter pass:[*]_dest_, struct tep_event_filter pass:[*]_source_);
+int *tep_filter_compare*(struct tep_event_filter pass:[*]_filter1_, struct tep_event_filter pass:[*]_filter2_);
+char pass:[*]*tep_filter_make_string*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
+int *tep_filter_strerror*(struct tep_event_filter pass:[*]_filter_, enum tep_errno _err_, char pass:[*]buf, size_t _buflen_);
+--
+
+DESCRIPTION
+-----------
+Filters can be attached to traced events. They can be used to filter out various
+events when outputting them. Each event can be filtered based on its parameters,
+described in the event's format file. This set of functions can be used to
+create, delete, modify and attach event filters.
+
+The *tep_filter_alloc()* function creates a new event filter. The _tep_ argument
+is the trace event parser context.
+
+The *tep_filter_free()* function frees an event filter and all resources that it
+had used.
+
+The *tep_filter_reset()* function removes all rules from an event filter and
+resets it.
+
+The *tep_filter_add_filter_str()* function adds a new rule to the _filter_. The
+_filter_str_ argument is the filter string, that contains the rule.
+
+The *tep_event_filtered()* function checks if the event with _event_id_ has
+_filter_.
+
+The *tep_filter_remove_event()* function removes a _filter_ for an event with
+_event_id_.
+
+The *tep_filter_match()* function tests if a _record_ matches given _filter_.
+
+The *tep_filter_copy()* function copies a _source_ filter into a _dest_ filter.
+
+The *tep_filter_compare()* function compares two filers - _filter1_ and _filter2_.
+
+The *tep_filter_make_string()* function constructs a string, displaying
+the _filter_ contents for given _event_id_.
+
+The *tep_filter_strerror()* function copies the _filter_ error buffer into the
+given _buf_ with the size _buflen_. If the error buffer is empty, in the _buf_
+is copied a string, describing the error _err_.
+
+RETURN VALUE
+------------
+The *tep_filter_alloc()* function returns a pointer to the newly created event
+filter, or NULL in case of an error.
+
+The *tep_filter_add_filter_str()* function returns 0 if the rule was
+successfully added or a negative error code. Use *tep_filter_strerror()* to see
+actual error message in case of an error.
+
+The *tep_event_filtered()* function returns 1 if the filter is found for given
+event, or 0 otherwise.
+
+The *tep_filter_remove_event()* function returns 1 if the vent was removed, or
+0 if the event was not found.
+
+The *tep_filter_match()* function returns _tep_errno_, according to the result:
+[verse]
+--
+_pass:[TEP_ERRNO__FILTER_MATCH]_ - filter found for event, the record matches.
+_pass:[TEP_ERRNO__FILTER_MISS]_ - filter found for event, the record does not match.
+_pass:[TEP_ERRNO__FILTER_NOT_FOUND]_ - no filter found for record's event.
+_pass:[TEP_ERRNO__NO_FILTER]_ - no rules in the filter.
+--
+or any other _tep_errno_, if an error occurred during the test.
+
+The *tep_filter_copy()* function returns 0 on success or -1 if not all rules
+ were copied.
+
+The *tep_filter_compare()* function returns 1 if the two filters hold the same
+content, or 0 if they do not.
+
+The *tep_filter_make_string()* function returns a string, which must be freed
+with free(), or NULL in case of an error.
+
+The *tep_filter_strerror()* function returns 0 if message was filled
+successfully, or -1 in case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+char errstr[200];
+int ret;
+
+struct tep_event_filter *filter = tep_filter_alloc(tep);
+struct tep_event_filter *filter1 = tep_filter_alloc(tep);
+ret = tep_filter_add_filter_str(filter, "sched/sched_wakeup:target_cpu==1");
+if(ret < 0) {
+ tep_filter_strerror(filter, ret, errstr, sizeof(errstr));
+ /* Failed to add a new rule to the filter, the error string is in errstr */
+}
+if (tep_filter_copy(filter1, filter) != 0) {
+ /* Failed to copy filter in filter1 */
+}
+...
+if (tep_filter_compare(filter, filter1) != 1) {
+ /* Both filters are different */
+}
+...
+void process_record(struct tep_handle *tep, struct tep_record *record)
+{
+ struct tep_event *event;
+ char *fstring;
+
+ event = tep_find_event_by_record(tep, record);
+
+ if (tep_event_filtered(filter, event->id) == 1) {
+ /* The event has filter */
+ fstring = tep_filter_make_string(filter, event->id);
+ if (fstring != NULL) {
+ /* The filter for the event is in fstring */
+ free(fstring);
+ }
+ }
+
+ switch (tep_filter_match(filter, record)) {
+ case TEP_ERRNO__FILTER_MATCH:
+ /* The filter matches the record */
+ break;
+ case TEP_ERRNO__FILTER_MISS:
+ /* The filter does not match the record */
+ break;
+ case TEP_ERRNO__FILTER_NOT_FOUND:
+ /* No filter found for record's event */
+ break;
+ case TEP_ERRNO__NO_FILTER:
+ /* There are no rules in the filter */
+ break
+ default:
+ /* An error occurred during the test */
+ break;
+ }
+
+ if (tep_filter_remove_event(filter, event->id) == 1) {
+ /* The event was removed from the filter */
+ }
+}
+
+...
+tep_filter_reset(filter);
+...
+tep_filter_free(filter);
+tep_filter_free(filter1);
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-func_apis.txt b/Documentation/libtraceevent-func_apis.txt
new file mode 100644
index 0000000..1b836a1
--- /dev/null
+++ b/Documentation/libtraceevent-func_apis.txt
@@ -0,0 +1,168 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_set_function_resolver, tep_reset_function_resolver, tep_register_function, tep_register_print_string,
+tep_get_function_count - function related tep APIs
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+typedef char pass:[*](*tep_func_resolver_t*)(void pass:[*]_priv_, unsigned long long pass:[*]_addrp_, char pass:[**]_modp_);
+int *tep_set_function_resolver*(struct tep_handle pass:[*]_tep_, tep_func_resolver_t pass:[*]_func_, void pass:[*]_priv_);
+void *tep_reset_function_resolver*(struct tep_handle pass:[*]_tep_);
+int *tep_register_function*(struct tep_handle pass:[*]_tep_, char pass:[*]_name_, unsigned long long _addr_, char pass:[*]_mod_);
+int *tep_register_print_string*(struct tep_handle pass:[*]_tep_, const char pass:[*]_fmt_, unsigned long long _addr_);
+int *tep_get_function_count*(struct tep_handle *_tep_)
+--
+
+DESCRIPTION
+-----------
+Some tools may have already a way to resolve the kernel functions. These APIs
+allow them to keep using it instead of duplicating all the entries inside.
+
+The _tep_func_resolver_t_ type is the prototype of the alternative kernel
+functions resolver. This function receives a pointer to its custom context
+(set with the *tep_set_function_resolver()* call ) and the address of a kernel
+function, which has to be resolved. In case of success, it should return
+the name of the function and its module (if any) in _modp_.
+
+The *tep_set_function_resolver()* function registers _func_ as an alternative
+kernel functions resolver. The _tep_ argument is trace event parser context.
+The _priv_ argument is a custom context of the _func_ function. The function
+resolver is used by the APIs *tep_find_function*(3),
+*tep_find_function_address*(3), and *tep_print_func_field()* to resolve
+a function address to a function name.
+
+The *tep_reset_function_resolver()* function resets the kernel functions
+resolver to the default function. The _tep_ argument is trace event parser
+context.
+
+
+These APIs can be used to find function name and start address, by given
+address. The given address does not have to be exact, it will select
+the function that would contain it.
+
+The *tep_register_function()* function registers a function name mapped to an
+address and (optional) module. This mapping is used in case the function tracer
+or events have "%pS" parameter in its format string. It is common to pass in
+the kallsyms function names with their corresponding addresses with this
+function. The _tep_ argument is the trace event parser context. The _name_ is
+the name of the function, the string is copied internally. The _addr_ is the
+start address of the function. The _mod_ is the kernel module the function may
+be in (NULL for none).
+
+The *tep_register_print_string()* function registers a string by the address
+it was stored in the kernel. Some strings internal to the kernel with static
+address are passed to certain events. The "%s" in the event's format field
+which has an address needs to know what string would be at that address. The
+tep_register_print_string() supplies the parsing with the mapping between kernel
+addresses and those strings. The _tep_ argument is the trace event parser
+context. The _fmt_ is the string to register, it is copied internally.
+The _addr_ is the address the string was located at.
+
+*tep_get_function_count*() returns the number of registered functions in a tep handler.
+
+RETURN VALUE
+------------
+The *tep_set_function_resolver()* function returns 0 in case of success, or -1
+in case of an error.
+
+The *tep_register_function()* function returns 0 in case of success. In case of
+an error -1 is returned, and errno is set to the appropriate error number.
+
+The *tep_register_print_string()* function returns 0 in case of success. In case
+of an error -1 is returned, and errno is set to the appropriate error number.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+char *my_resolve_kernel_addr(void *context,
+ unsigned long long *addrp, char **modp)
+{
+ struct db *function_database = context;
+ struct symbol *sym = sql_lookup(function_database, *addrp);
+
+ if (!sym)
+ return NULL;
+
+ *modp = sym->module_name;
+ return sym->name;
+}
+
+void show_function( unsigned long long addr)
+{
+ unsigned long long fstart;
+ const char *fname;
+
+ if (tep_set_function_resolver(tep, my_resolve_kernel_addr,
+ function_database) != 0) {
+ /* failed to register my_resolve_kernel_addr */
+ }
+
+ /* These APIs use my_resolve_kernel_addr() to resolve the addr */
+ fname = tep_find_function(tep, addr);
+ fstart = tep_find_function_address(tep, addr);
+
+ /*
+ addr is in function named fname, starting at fstart address,
+ at offset (addr - fstart)
+ */
+
+ tep_reset_function_resolver(tep);
+
+}
+...
+ if (tep_register_function(tep, "kvm_exit",
+ (unsigned long long) 0x12345678, "kvm") != 0) {
+ /* Failed to register kvm_exit address mapping */
+ }
+...
+ if (tep_register_print_string(tep, "print string",
+ (unsigned long long) 0x87654321, NULL) != 0) {
+ /* Failed to register "print string" address mapping */
+ }
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-func_find.txt b/Documentation/libtraceevent-func_find.txt
new file mode 100644
index 0000000..26fac68
--- /dev/null
+++ b/Documentation/libtraceevent-func_find.txt
@@ -0,0 +1,131 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_find_function,tep_find_function_address,tep_find_function_info - Find function name / start address.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+const char pass:[*]*tep_find_function*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
+unsigned long long *tep_find_function_address*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
+int *tep_find_function_info*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_, const char pass:[**]_name_,
+ unsigned long long pass:[*]_start_, unsigned long pass:[*]_size_);
+--
+
+DESCRIPTION
+-----------
+These functions can be used to find function name and start address, by given
+address. The given address does not have to be exact, it will select the function
+that would contain it.
+
+The *tep_find_function()* function returns the function name, which contains the
+given address _addr_. The _tep_ argument is the trace event parser context.
+
+The *tep_find_function_address()* function returns the function start address,
+by given address _addr_. The _addr_ does not have to be exact, it will select the
+function that would contain it. The _tep_ argument is the trace event parser context.
+
+The *tep_find_function_info()* function retrieves the _name_, starting address (_start_),
+and the function text _size_ of the function at _address_, if it is found. Note,
+if the _tep_ handle has a function resolver (used by perf), then _size_ is set to
+zero.
+
+RETURN VALUE
+------------
+The *tep_find_function()* function returns the function name, or NULL in case
+it cannot be found.
+
+The *tep_find_function_address()* function returns the function start address,
+or 0 in case it cannot be found.
+
+The *tep_find_function_info()* function returns 1 if a function is found for the
+given address, or 0 if it is not.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+void show_function_name(unsigned long long addr)
+{
+ const char *fname = tep_find_function(tep, addr);
+
+ if (fname)
+ printf("Found function %s at 0x%0llx\n", fname, addr);
+ else
+ printf("No function found at 0x%0llx\n", addr);
+}
+
+void show_function_start_addr(unsigned long long addr)
+{
+ const char *fname = tep_find_function(tep, addr);
+ unsigned long long fstart;
+
+ if (!fname) {
+ printf("No function found at 0x%0llx\n", addr);
+ return;
+ }
+
+ fstart = tep_find_function_address(tep, addr);
+ printf("Function %s at 0x%llx starts at 0x%0llx\n",
+ fname, addr, fstart);
+}
+
+void show_function_info(unsigned long long addr)
+{
+ const char *fname;
+ unsigned long long fstart;
+ unsigned long size;
+
+ ret = tep_find_function_info(tep, addr, &fname, &fstart, &size);
+ if (!ret) {
+ printf("No function found at 0x%0lx\n", addr);
+ return;
+ }
+
+ printf("Function %s at 0x%lx starts at 0x%0lx and is %ld in size\n",
+ fname, addr, fstart, size);
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-handle.txt b/Documentation/libtraceevent-handle.txt
new file mode 100644
index 0000000..64528eb
--- /dev/null
+++ b/Documentation/libtraceevent-handle.txt
@@ -0,0 +1,108 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_alloc, tep_free,tep_ref, tep_unref,tep_get_ref, tep_kbuffer - Create, destroy, manage
+references of trace event parser context.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_handle pass:[*]*tep_alloc*(void);
+void *tep_free*(struct tep_handle pass:[*]_tep_);
+void *tep_ref*(struct tep_handle pass:[*]_tep_);
+void *tep_unref*(struct tep_handle pass:[*]_tep_);
+int *tep_get_ref*(struct tep_handle pass:[*]_tep_);
+--
+
+DESCRIPTION
+-----------
+These are the main functions to create and destroy tep_handle - the main
+structure, representing the trace event parser context. This context is used as
+the input parameter of most library APIs.
+
+The *tep_alloc()* function allocates and initializes the tep context.
+
+The *tep_free()* function will decrement the reference of the _tep_ handler.
+When there is no more references, then it will free the handler, as well
+as clean up all its resources that it had used. The argument _tep_ is
+the pointer to the trace event parser context.
+
+The *tep_ref()* function adds a reference to the _tep_ handler.
+
+The *tep_unref()* function removes a reference from the _tep_ handler. When
+the last reference is removed, the _tep_ is destroyed, and all resources that
+it had used are cleaned up.
+
+The *tep_ref_get()* functions gets the current references of the _tep_ handler.
+
+The *tep_kbuffer()* function allocates a kbuffer descriptor that can be used to
+parse raw data that is represented by the _tep_ handle descriptor. It must be freed
+with *kbuf_free(3)*.
+
+RETURN VALUE
+------------
+*tep_alloc()* returns a pointer to a newly created tep_handle structure.
+NULL is returned in case there is not enough free memory to allocate it.
+
+*tep_ref_get()* returns the current references of _tep_.
+If _tep_ is NULL, 0 is returned.
+
+*tep_kbuffer()* returns a kbuffer descriptor that can parse the raw data that
+represents the tep handle. Must be freed with *kbuf_free(3)*.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+
+...
+struct tep_handle *tep = tep_alloc();
+...
+int ref = tep_get_ref(tep);
+tep_ref(tep);
+if ( (ref+1) != tep_get_ref(tep)) {
+ /* Something wrong happened, the counter is not incremented by 1 */
+}
+tep_unref(tep);
+...
+tep_free(tep);
+...
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-header_page.txt b/Documentation/libtraceevent-header_page.txt
new file mode 100644
index 0000000..31b66e0
--- /dev/null
+++ b/Documentation/libtraceevent-header_page.txt
@@ -0,0 +1,102 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_get_header_page_size, tep_get_header_timestamp_size, tep_is_old_format -
+Get the data stored in the header page, in kernel context.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_get_header_page_size*(struct tep_handle pass:[*]_tep_);
+int *tep_get_header_timestamp_size*(struct tep_handle pass:[*]_tep_);
+bool *tep_is_old_format*(struct tep_handle pass:[*]_tep_);
+--
+DESCRIPTION
+-----------
+These functions retrieve information from kernel context, stored in tracefs
+events/header_page. Old kernels do not have header page info, so default values
+from user space context are used.
+
+The *tep_get_header_page_size()* function returns the size of a long integer,
+in kernel context. The _tep_ argument is trace event parser context.
+This information is retrieved from tracefs events/header_page, "commit" field.
+
+The *tep_get_header_timestamp_size()* function returns the size of timestamps,
+in kernel context. The _tep_ argument is trace event parser context. This
+information is retrieved from tracefs events/header_page, "timestamp" field.
+
+The *tep_is_old_format()* function returns true if the kernel predates
+the addition of events/header_page, otherwise it returns false.
+
+RETURN VALUE
+------------
+The *tep_get_header_page_size()* function returns the size of a long integer,
+in bytes.
+
+The *tep_get_header_timestamp_size()* function returns the size of timestamps,
+in bytes.
+
+The *tep_is_old_format()* function returns true, if an old kernel is used to
+generate the tracing data, which has no event/header_page. If the kernel is new,
+or _tep_ is NULL, false is returned.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+ int longsize;
+ int timesize;
+ bool old;
+
+ longsize = tep_get_header_page_size(tep);
+ timesize = tep_get_header_timestamp_size(tep);
+ old = tep_is_old_format(tep);
+
+ printf ("%s kernel is used to generate the tracing data.\n",
+ old?"Old":"New");
+ printf("The size of a long integer is %d bytes.\n", longsize);
+ printf("The timestamps size is %d bytes.\n", timesize);
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-host_endian.txt b/Documentation/libtraceevent-host_endian.txt
new file mode 100644
index 0000000..76d309a
--- /dev/null
+++ b/Documentation/libtraceevent-host_endian.txt
@@ -0,0 +1,104 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_is_bigendian, tep_is_local_bigendian, tep_set_local_bigendian - Get / set
+the endianness of the local machine.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_endian* {
+ TEP_LITTLE_ENDIAN = 0,
+ TEP_BIG_ENDIAN
+};
+
+int *tep_is_bigendian*(void);
+bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_);
+void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
+--
+
+DESCRIPTION
+-----------
+
+The *tep_is_bigendian()* gets the endianness of the machine, executing
+the function.
+
+The *tep_is_local_bigendian()* function gets the endianness of the local
+machine, saved in the _tep_ handler. The _tep_ argument is the trace event
+parser context. This API is a bit faster than *tep_is_bigendian()*, as it
+returns cached endianness of the local machine instead of checking it each time.
+
+The *tep_set_local_bigendian()* function sets the endianness of the local
+machine in the _tep_ handler. The _tep_ argument is trace event parser context.
+The _endian_ argument is the endianness:
+[verse]
+--
+ _TEP_LITTLE_ENDIAN_ - the machine is little endian,
+ _TEP_BIG_ENDIAN_ - the machine is big endian.
+--
+
+RETURN VALUE
+------------
+The *tep_is_bigendian()* function returns non zero if the endianness of the
+machine, executing the code, is big endian and zero otherwise.
+
+The *tep_is_local_bigendian()* function returns true, if the endianness of the
+local machine, saved in the _tep_ handler, is big endian, or false otherwise.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+ if (tep_is_bigendian())
+ tep_set_local_bigendian(tep, TEP_BIG_ENDIAN);
+ else
+ tep_set_local_bigendian(tep, TEP_LITTLE_ENDIAN);
+...
+ if (tep_is_local_bigendian(tep))
+ printf("This machine you are running on is bigendian\n");
+ else
+ printf("This machine you are running on is little endian\n");
+
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-kbuffer-create.txt b/Documentation/libtraceevent-kbuffer-create.txt
new file mode 100644
index 0000000..12e5d6c
--- /dev/null
+++ b/Documentation/libtraceevent-kbuffer-create.txt
@@ -0,0 +1,207 @@
+libtraceevent(3)
+================
+
+NAME
+----
+kbuffer_alloc, kbuffer_free, kbuffer_load_subbuffer, kbuffer_subbuffer_size, kbuffer_start_of_data - Creating of kbuffer element to parse
+the Linux kernel tracing ring buffer
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <kbuffer.h>*
+
+enum kbuffer_endian {
+ KBUFFER_ENDIAN_BIG,
+ KBUFFER_ENDIAN_LITTLE,
+ KBUFFER_ENDIAN_SAME_AS_HOST,
+};
+
+enum kbuffer_long_size {
+ KBUFFER_LSIZE_4,
+ KBUFFER_LSIZE_8,
+ KBUFFER_LSIZE_SAME_AS_HOST,
+};
+
+struct kbuffer;
+struct tep_handle;
+
+struct kbuffer pass:[*]*kbuffer_alloc*(enum kbuffer_long_size _size_, enum kbuffer_endian _endian_);
+void *kbuffer_free*(struct kbuffer pass:[*]_kbuf_);
+int *kbuffer_load_subbuffer*(struct kbuffer pass:[*]_kbuf_, void pass:[*]_subbuffer_);
+int *kbuffer_subbuffer_size*(struct kbuffer pass:[*]_kbuf);
+int *kbuffer_start_of_data*(struct kbuffer pass:[*]_kbuf_);
+--
+
+DESCRIPTION
+-----------
+These functions create a _kbuffer_ handle that can be used to parse the raw sub buffers
+of the Linux kernel tracing ring buffer. The ring buffer is found in the tracefs
+directory, and can be retrieved by *tracefs_instance_get_file(3)* at
+*per_cpu/cpuX/trace_pipe_raw* where *X* is replaced by the per CPU number of
+the specified ring buffer. The ring buffer inside the kernel is split up per
+CPU, such that the raw ring buffer must be retrieved per CPU as well.
+
+The *kbuffer_alloc()* will create a descriptor that can be used to manage a sub buffer
+read by the ring buffer. The _size_ parameter denotes what the word size is
+for the given buffer (note, this works from reading raw data from machines other
+than the machine that is calling this function). The _endian_ denotes the endian
+for the machine.
+
+If _endian_ is set to _KBUFFER_ENDIAN_SAME_AS_HOST_ the endian will be set to the same
+as the host endianess, which is useful when the application is reading the
+ring buffer data directly from the same machine it is running on.
+
+If _size_ is set to _KBUFFER_LSIZE_SAME_AS_HOST_, if the word size is 8, it will
+set the kbuffer descriptor to long size of 8. But if the size is 4, then it
+will then perform a *uname(2)* call, and if the _machine_ field has the string "64"
+in it, it will be set to 8 byte long size and not 4 byte. This is because the
+ring buffer long size is dependent on the kernel and not user space.
+
+The *kbuffer_free()* function will free the resources created by *kbuffer_alloc()*.
+
+The *kbuffer_load_subbuffer()* will take a _subbuffer_ which is a raw data blob
+from the tracefs *trace_pipe_raw* file. The Linux tracing ring buffer is broken up
+into sub buffers. Each sub buffer is as stand alone data segment that has all the
+information to split out the individual events and time stamps. This sub buffer
+is what kbuffer uses to walk the events.
+
+The *kbuffer_subbuffer_size()* returns the location of the end of the last event
+on the sub-buffer. It does not return the size of the sub-buffer itself.
+
+The *kbuffer_start_of_data()* function returns the offset of where the actual
+data load of the sub-buffer begins.
+
+RETURN VALUE
+------------
+*kbuffer_alloc()* returns an allocated kbuffer descriptor or NULL on error.
+The returned descriptor must be freed with *kbuffer_free()*
+
+*kbuffer_load_subbuffer()* returns 0 on success and -1 on error.
+
+*kbuffer_subbuffer_size()* returns the index on the subbuffer where the end
+of the last event is located.
+
+*kbuffer_start_of_data()* returns the offset of where the data begins on the
+sub-buffer loaded in _kbuf_.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <kbuffer.h>
+
+int main (int argc, char **argv)
+{
+ unsigned long long ts;
+ struct kbuffer *kbuf;
+ struct stat st;
+ char *buf;
+ void *event;
+ int ret;
+ int fd;
+ int i = 0;
+
+ if (argc < 2) {
+ printf("usage: %s raw-subbuffer-page\n", argv[0]);
+ printf(" Try: dd count=1 bs=4096 if=/sys/kernel/tracing/per_cpu/cpu0/trace_pipe_raw of=/tmp/file\n");
+ exit(0);
+ }
+
+ if (stat(argv[1], &st) < 0) {
+ perror("stat");
+ exit(-1);
+ }
+
+ buf = malloc(st.st_size);
+ if (!buf) {
+ perror("Allocating buffer");
+ exit(-1);
+ }
+
+ fd = open(argv[1], O_RDONLY);
+ if (fd < 0) {
+ perror(argv[1]);
+ exit(-1);
+ }
+
+ ret = read(fd, buf, st.st_size);
+ if (ret < 0) {
+ perror("Reading buffer");
+ exit(-1);
+ }
+ close(fd);
+
+ kbuf = kbuffer_alloc(KBUFFER_ENDIAN_SAME_AS_HOST,
+ KBUFFER_LSIZE_SAME_AS_HOST);
+ if (!kbuf) {
+ perror("Creating kbuffer");
+ exit(-1);
+ }
+ ret = kbuffer_load_subbuffer(kbuf, buf);
+ if (ret < 0) {
+ perror("Loading sub bufer");
+ exit(-1);
+ }
+
+ if (kbuffer_subbuffer_size(kbuf) > st.st_size) {
+ fprintf(stderr, "kbuffer is bigger than raw size %d > %ld\n",
+ kbuffer_subbuffer_size(kbuf), st.st_size);
+ exit(-1);
+ }
+
+ printf("Kbuffer data starts at %d\n", kbuffer_start_of_data(kbuf));
+ do {
+ event = kbuffer_read_event(kbuf, &ts);
+ if (event) {
+ printf(" event %3d ts:%lld\n", i++, ts);
+ event = kbuffer_next_event(kbuf, NULL);
+ }
+ } while (event);
+
+ if (!event)
+ printf("Finished sub buffer\n");
+
+ kbuffer_free(kbuf);
+
+ return 0;
+}
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-kbuffer-read.txt b/Documentation/libtraceevent-kbuffer-read.txt
new file mode 100644
index 0000000..68184ad
--- /dev/null
+++ b/Documentation/libtraceevent-kbuffer-read.txt
@@ -0,0 +1,246 @@
+libtraceevent(3)
+================
+
+NAME
+----
+kbuffer_read_event, kbuffer_next_event, kbuffer_missed_events, kbuffer_event_size, kbuffer_curr_size,
+kbuffer_curr_offset, kbuffer_curr_index -
+Functions to read through the kbuffer sub buffer.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <kbuffer.h>*
+
+void pass:[*]*kbuffer_read_event*(struct kbuffer pass:[*]_kbuf_, unsigned long long pass:[*]_ts_);
+void pass:[*]*kbuffer_next_event*(struct kbuffer pass:[*]_kbuf_, unsigned long long pass:[*]_ts_);
+void pass:[*]*kbuffer_read_at_offset*(struct kbuffer pass:[*]_kbuf_, int _offset_, unsigned long long pass:[*]_ts_);
+int *kbuffer_missed_events*(struct kbuffer pass:[*]_kbuf_);
+int *kbuffer_event_size*(struct kbuffer pass:[*]_kbuf_);
+int *kbuffer_curr_size*(struct kbuffer pass:[*]_kbuf_);
+int *kbuffer_curr_offset*(struct kbuffer pass:[*]_kbuf_);
+int *kbuffer_curr_index*(struct kbuffer pass:[*]_kbuf_);
+--
+
+DESCRIPTION
+-----------
+The function *kbuffer_read_event()* reads the next event in the _kbuf_ descriptor
+and if _ts_ is non NULL, will place its timestamp into it. This does not modify the _kbuf_
+descriptor, and calling this function mulitple times will return the same result.
+
+The function *kbuffer_next_event()* will return the next event in the _kbuf_ descriptor.
+It will also set the _ts_ to the timestamp of the returned event. NULL is returned
+if there are no more events and _ts_ will be undefined. Note, if this is called directly
+after a *kbuffer_load_subbuffer()* then it will likely give an unexpected result, as it
+will return the second event and not the first event. Usually this function is only used
+to move to the next event and to know if there's any more events to read, and
+*kbuffer_read_event()* is always called first.
+
+The function *kbuffer_read_at_offset()* returns the event located at a given _offset_ from
+the beginning of the sub-buffer. This offset can be retrieved by *kbuffer_curr_offset()*.
+If _ts_ points to an unsigned long long, then it will be set to the event at the given
+offset's timestamp.
+
+If the sub-buffer had missed events before it, then *kbuffer_missed_events()* will return
+the non zero. If it returns -1, that means there were missed events, but the exact number
+of missed events is unknown. If it returns a positive number, then the number of missed events
+is the return value.
+
+The *kbuffer_event_size()* function returns the size of the data portion of the current event
+(the one that would be returned by *kbuffer_read_event()*.
+
+The *kbuffer_curr_size()* function returns the entire record size of the current event
+(the one that would be returned by *kbuffer_read_event()*. The difference here is that the
+return value includes the size of the event record meta data that is not part of what
+is returned by *kbuffer_read_event()*.
+
+The *kbuffer_curr_offset()* function returns the offset from the beginning of the sub-buffer
+of where the current event's meta data for the record begins. The first event will
+not be at offset zero. This offset can be used to retrieve the event with
+*kbuffer_read_at_offset()*.
+
+The *kbuffer_curr_index()* function returns the index from the beginning of the data
+portion of the sub-buffer where the current evnet's meta data is located.
+The first event will likely be zero, but may not be if there's a timestamp attached to it.
+
+RETURN VALUE
+------------
+*kbuffer_read_event()* returns the event that the _kbuf_ descriptor is currently at,
+or NULL if the last event was passed (by *kbuffer_next_event()*).
+
+*kbuffer_next_event()* returns the next event after the current event or NULL if there
+are no more events.
+
+*kbuffer_read_at_offset()* returns the event at a given _offset_ from the start of
+the sub-buffer stored in _kbuf_, or NULL if there exists no event. Note, _offset_
+only needs to be an offset that lands on the record, or is at the start of it. It does
+not need to be exactly at the beginning of the record.
+
+*kbuffer_missed_events()* returns 0 if there were no missed events before loaded sub-buffer.
+Returns -1 if there were an unknown number of missed events, or if the number of missed events
+is known, that number will be returned.
+
+*kbuffer_event_size()* returns the size of the data payload of the current event of _kbuf_.
+
+*kbuffer_curr_size()* returns the size of the entire record of the current event of _kbuf_.
+This includes the size of the meta data for that record.
+
+*kbuf_curr_offset()* returns the offset of the current record from the beginning of the _kbuf_
+sub-buffer.
+
+*kbuf_curr_index()* returns the index of the current record from the beginning of the _kbuf_
+data section.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <kbuffer.h>
+
+int main (int argc, char **argv)
+{
+ unsigned long long ts;
+ struct kbuffer *kbuf;
+ struct stat st;
+ char *buf;
+ void *event;
+ int save_offset = -1;
+ int record_size;
+ int offset;
+ int index;
+ int size;
+ int ret;
+ int fd;
+ int i = 0;
+
+ if (argc < 2) {
+ printf("usage: %s raw-subbuffer-page\n", argv[0]);
+ printf(" Try: dd count=1 bs=4096 if=/sys/kernel/tracing/per_cpu/cpu0/trace_pipe_raw of=/tmp/file\n");
+ exit(0);
+ }
+
+ if (stat(argv[1], &st) < 0) {
+ perror("stat");
+ exit(-1);
+ }
+
+ buf = malloc(st.st_size);
+ if (!buf) {
+ perror("Allocating buffer");
+ exit(-1);
+ }
+
+ fd = open(argv[1], O_RDONLY);
+ if (fd < 0) {
+ perror(argv[1]);
+ exit(-1);
+ }
+
+ ret = read(fd, buf, st.st_size);
+ if (ret < 0) {
+ perror("Reading buffer");
+ exit(-1);
+ }
+ close(fd);
+
+ kbuf = kbuffer_alloc(KBUFFER_ENDIAN_SAME_AS_HOST,
+ KBUFFER_LSIZE_SAME_AS_HOST);
+ if (!kbuf) {
+ perror("Creating kbuffer");
+ exit(-1);
+ }
+ ret = kbuffer_load_subbuffer(kbuf, buf);
+ if (ret < 0) {
+ perror("Loading sub bufer");
+ exit(-1);
+ }
+
+ if (kbuffer_subbuffer_size(kbuf) > st.st_size) {
+ fprintf(stderr, "kbuffer is bigger than raw size %d > %ld\n",
+ kbuffer_subbuffer_size(kbuf), st.st_size);
+ exit(-1);
+ }
+
+ ret = kbuffer_missed_events(kbuf);
+ if (ret) {
+ if (ret > 0)
+ printf("Missed %d events before this buffer\n", ret);
+ else
+ printf("Missed unknown number of events before this buffer\n");
+ }
+ do {
+ event = kbuffer_read_event(kbuf, &ts);
+ if (event) {
+ record_size = kbuffer_curr_size(kbuf);
+ offset = kbuffer_curr_offset(kbuf);
+ index = kbuffer_curr_index(kbuf);
+ size = kbuffer_event_size(kbuf);
+
+ if (i == 20)
+ save_offset = offset;
+ printf(" event %3d ts:%lld\trecord_size:%d size:%d\tindex:%d offset:%d\n",
+ i++, ts, record_size, size, index, offset);
+ event = kbuffer_next_event(kbuf, NULL);
+ }
+ } while (event);
+
+ if (!event)
+ printf("Finished sub buffer\n");
+
+ if (save_offset > 0) {
+ event = kbuffer_read_at_offset(kbuf, save_offset, &ts);
+ if (!event) {
+ fprintf(stderr, "Funny, can't find event 20 at offset %d\n", save_offset);
+ exit(-1);
+ }
+ record_size = kbuffer_curr_size(kbuf);
+ offset = kbuffer_curr_offset(kbuf);
+ index = kbuffer_curr_index(kbuf);
+ size = kbuffer_event_size(kbuf);
+
+ printf("\n saved event 20 ts:%lld\trecord_size:%d size:%d\tindex:%d offset:%d\n\n",
+ ts, record_size, size, index, offset);
+ }
+ kbuffer_free(kbuf);
+
+ return 0;
+}
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-kbuffer-timestamp.txt b/Documentation/libtraceevent-kbuffer-timestamp.txt
new file mode 100644
index 0000000..d7de225
--- /dev/null
+++ b/Documentation/libtraceevent-kbuffer-timestamp.txt
@@ -0,0 +1,208 @@
+libtraceevent(3)
+================
+
+NAME
+----
+kbuffer_timestamp, kbuffer_subbuf_timestamp -
+Functions that read various data of a kbuffer descriptor
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <kbuffer.h>*
+
+unsigned long long *kbuffer_timestamp*(struct kbuffer pass:[*]_kbuf_);
+unsigned long long *kbuffer_subbuf_timestamp*(struct kbuffer pass:[*]_kbuf_, void pass:[*]_subbuf_);
+--
+
+DESCRIPTION
+-----------
+The function *kbuffer_timestamp()* returns the timestamp of the current event of _kbuf_.
+
+The function *kbuffer_subbuf_timestamp()* returns the timestamp for the sub-buffer
+that was loaded in _kbuf_. This usually is (but not guaranteed to be) the timestamp
+of the first event on the sub-buffer.
+
+The function *kbuffer_start_of_data()* returns the offset of where the delta
+
+RETURN VALUE
+------------
+*kbuffer_read_event()* returns the event that the _kbuf_ descriptor is currently at,
+or NULL if the last event was passed (by *kbuffer_next_event()*).
+
+*kbuffer_next_event()* returns the next event after the current event or NULL if there
+are no more events.
+
+*kbuffer_read_at_offset()* returns the event at a given _offset_ from the start of
+the sub-buffer stored in _kbuf_, or NULL if there exists no event. Note, _offset_
+only needs to be an offset that lands on the record, or is at the start of it. It does
+not need to be exactly at the beginning of the record.
+
+*kbuffer_missed_events()* returns 0 if there were no missed events before loaded sub-buffer.
+Returns -1 if there were an unknown number of missed events, or if the number of missed events
+is known, that number will be returned.
+
+*kbuffer_event_size()* returns the size of the data payload of the current event of _kbuf_.
+
+*kbuffer_curr_size()* returns the size of the entire record of the current event of _kbuf_.
+This includes the size of the meta data for that record.
+
+*kbuf_curr_offset()* returns the offset of the current record from the beginning of the _kbuf_
+sub-buffer.
+
+*kbuf_curr_index()* returns the index of the current record from the beginning of the _kbuf_
+data section.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <kbuffer.h>
+
+int main (int argc, char **argv)
+{
+ unsigned long long ts;
+ struct kbuffer *kbuf;
+ struct stat st;
+ char *buf;
+ void *event;
+ int save_offset = -1;
+ int record_size;
+ int offset;
+ int index;
+ int size;
+ int ret;
+ int fd;
+ int i = 0;
+
+ if (argc < 2) {
+ printf("usage: %s raw-subbuffer-page\n", argv[0]);
+ printf(" Try: dd count=1 bs=4096 if=/sys/kernel/tracing/per_cpu/cpu0/trace_pipe_raw of=/tmp/file\n");
+ exit(0);
+ }
+
+ if (stat(argv[1], &st) < 0) {
+ perror("stat");
+ exit(-1);
+ }
+
+ buf = malloc(st.st_size);
+ if (!buf) {
+ perror("Allocating buffer");
+ exit(-1);
+ }
+
+ fd = open(argv[1], O_RDONLY);
+ if (fd < 0) {
+ perror(argv[1]);
+ exit(-1);
+ }
+
+ ret = read(fd, buf, st.st_size);
+ if (ret < 0) {
+ perror("Reading buffer");
+ exit(-1);
+ }
+ close(fd);
+
+ kbuf = kbuffer_alloc(KBUFFER_ENDIAN_SAME_AS_HOST,
+ KBUFFER_LSIZE_SAME_AS_HOST);
+ if (!kbuf) {
+ perror("Creating kbuffer");
+ exit(-1);
+ }
+ ret = kbuffer_load_subbuffer(kbuf, buf);
+ if (ret < 0) {
+ perror("Loading sub bufer");
+ exit(-1);
+ }
+
+ if (kbuffer_subbuffer_size(kbuf) > st.st_size) {
+ fprintf(stderr, "kbuffer is bigger than raw size %d > %ld\n",
+ kbuffer_subbuffer_size(kbuf), st.st_size);
+ exit(-1);
+ }
+
+ ret = kbuffer_missed_events(kbuf);
+ if (ret) {
+ if (ret > 0)
+ printf("Missed %d events before this buffer\n", ret);
+ else
+ printf("Missed unknown number of events before this buffer\n");
+ }
+ do {
+ event = kbuffer_read_event(kbuf, &ts);
+ if (event) {
+ record_size = kbuffer_curr_size(kbuf);
+ offset = kbuffer_curr_offset(kbuf);
+ index = kbuffer_curr_index(kbuf);
+ size = kbuffer_event_size(kbuf);
+
+ if (i == 20)
+ save_offset = offset;
+ printf(" event %3d ts:%lld\trecord_size:%d size:%d\tindex:%d offset:%d\n",
+ i++, ts, record_size, size, index, offset);
+ event = kbuffer_next_event(kbuf, NULL);
+ }
+ } while (event);
+
+ if (!event)
+ printf("Finished sub buffer\n");
+
+ if (save_offset > 0) {
+ event = kbuffer_read_at_offset(kbuf, save_offset, &ts);
+ if (!event) {
+ fprintf(stderr, "Funny, can't find event 20 at offset %d\n", save_offset);
+ exit(-1);
+ }
+ record_size = kbuffer_curr_size(kbuf);
+ offset = kbuffer_curr_offset(kbuf);
+ index = kbuffer_curr_index(kbuf);
+ size = kbuffer_event_size(kbuf);
+
+ printf("\n saved event 20 ts:%lld\trecord_size:%d size:%d\tindex:%d offset:%d\n\n",
+ ts, record_size, size, index, offset);
+ }
+ kbuffer_free(kbuf);
+
+ return 0;
+}
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-kvm-plugin.txt b/Documentation/libtraceevent-kvm-plugin.txt
new file mode 100644
index 0000000..a02e786
--- /dev/null
+++ b/Documentation/libtraceevent-kvm-plugin.txt
@@ -0,0 +1,252 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_plugin_kvm_get_func, tep_plugin_kvm_put_func - Add function name for instruction pointer of kvm plugin
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+const char pass:[*]*tep_plugin_kvm_get_func*(struct tep_event pass:[*]event,
+ struct tep_record pass:[*]record,
+ unsigned long long pass:[*]paddr);
+void *tep_plugin_kvm_put_func*(const char pass:[*]func);
+--
+
+DESCRIPTION
+-----------
+The functions *tep_plugin_kvm_get_func()* and *tep_plugin_kvm_put_func()*
+are not to be called by an application, but instead are to be defined by
+an application.
+
+Certain events (like kvm_exit and kvm_entry) have the instruction pointer
+of where in the guest the context changed from guest to host. As the host
+only knows the instruction pointer and does not have information about what
+function in the guest that instruction pointer belongs to, it can only print
+the address.
+
+But the application may have more information about the guest, and know where
+the guest was when the exit occurred, and also even know the function name
+of that address.
+
+The KVM plugin for libtraceevent is called on these events, and then calls
+*tep_plugin_kvm_get_func()* to see if that function can resolve the instruction
+pointer address to a real function name. If the return is non NULL, it will
+print the function in the output for that event.
+
+These functions are currently defined as weak functions within the plugin, as
+to not require them to be defined elsewhere. For an application to override
+the weak function, it will need to define the function in a file that gets
+compiled with *-rdynamic*. That will tell the dynamic linker to examine that
+object file and use function names to resolve weak functions in other shared
+objects (in this case the KVM plugin shared object).
+
+If the application defines *tep_plugin_kvm_get_func()*, it must use the above
+prototype. The _event_ will hold the KVM event that has the instruction pointer
+field. The _record_ will be the instance of that event. The application's function
+does not need to use these parameters, but they may be useful for finding the
+function name for the address. The _paddr_ is a pointer to a 64 bit value (where
+only 32 bits may be used on 32 bit machines). This value is the instruction
+pointer to look up. If the application knows the start address of the function
+as well, it can set _paddr_ to that address, and the KVM plugin will also
+append a "+offset" to the function name where the offset is the original
+value in _paddr_ minus the value in _paddr_ when it is called. Finally,
+the application should return the function name as a nul terminated string
+if one is found.
+
+If the returned string of *tep_plugin_kvm_get_func()* was allocated, the KVM plugin
+will call *tep_plugin_kvm_put_func()* when it is through with it, passing the
+value returned by *tep_plugin_kvm_get_func()* as _func_. This allows the application
+to free it if necessary.
+
+RETURN VALUE
+------------
+The *tep_plugin_kvm_get_func()* is not to be called by the application but instead
+is to be defined by the application. It should return a nul terminated string representing
+the function for the given instruction pointer passed to it by reference in _paddr_. It
+can then optionally update the _paddr_ to a value that holds the start of the function.
+The string returned may be freed by the *tep_plugin_kvm_put_func()* that the application
+should define to clean up the string.
+
+The below example needs to be compiled with the *-rdynamic* flag so that the dynamic
+linker can resolve the *tep_plugin_kvm_get_func()* and *tep_plugin_kvm_put_func()* functions.
+
+When run against a trace.dat file produced by *trace-cmd(1)* recording the kvm_exit and
+kvm_entry events on a guest, and then the guest's /proc/kallsyms file is passed as the
+second parameter, the output produced will look something like:
+
+[source,c]
+--
+CPU 0/KVM-20407 83156.177626 [000] kvm_exit reason APIC_ACCESS rip 0xffffffffb0056ee2 exit native_apic_mem_write+0x2 info 10b0 0
+CPU 0/KVM-20407 83156.177632 [000] kvm_entry vcpu 0 rip 0xffffffffb0056ee8 enter native_apic_mem_write+0x8
+--
+
+But without those callbacks, it would look like:
+
+[source,c]
+--
+CPU 0/KVM-20407 83156.177626 [000] kvm_exit reason APIC_ACCESS rip 0xffffffffb0056ee2 info 10b0 0
+CPU 0/KVM-20407 83156.177632 [000] kvm_entry vcpu 0 rip 0xffffffffb0056ee8
+--
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <stdio.h>
+#include <stdlib.h>
+#include <event-parse.h>
+#include <trace-cmd.h>
+#include <sys/stat.h>
+
+static struct tep_handle *tep;
+
+const char *tep_plugin_kvm_get_func(struct tep_event *event, struct tep_record *record,
+ unsigned long long *paddr)
+{
+ const char *func;
+ char *event_func;
+ char *ename;
+
+ func = tep_find_function(tep, *paddr);
+ if (!func)
+ return NULL;
+
+ if (strcmp(event->name, "kvm_exit") == 0)
+ ename = "exit";
+ else
+ ename = "enter";
+
+ /*
+ * Normally, passing back func directly is sufficient and then
+ * tep_plugin_kvm_put_func() would not be required. But this example
+ * is showing how to handle allocation of the returned string.
+ */
+ event_func = malloc(strlen(ename) + strlen(func) + 2);
+ if (!event_func)
+ return NULL;
+ sprintf(event_func, "%s %s", ename, func);
+
+ *paddr = tep_find_function_address(tep, *paddr);
+
+ return event_func;
+}
+
+void tep_plugin_kvm_put_func(const char *func)
+{
+ char *f = (char *)func;
+
+ free(f);
+}
+
+static int show_event(struct tracecmd_input *handle, struct tep_event *event,
+ struct tep_record *record, int cpu, void *data)
+{
+ static struct trace_seq seq;
+ tep = data;
+
+ if (!seq.buffer)
+ trace_seq_init(&seq);
+
+ trace_seq_reset(&seq);
+ tep_print_event(tracecmd_get_tep(handle), &seq, record,
+ "%s-%d\t%6.1000d [%03d] %s\t%s\n",
+ TEP_PRINT_COMM, TEP_PRINT_PID,
+ TEP_PRINT_TIME, TEP_PRINT_CPU,
+ TEP_PRINT_NAME, TEP_PRINT_INFO);
+ trace_seq_terminate(&seq);
+ trace_seq_do_printf(&seq);
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ struct tracecmd_input *handle;
+ struct tep_handle *guest_tep;
+ struct stat st;
+ FILE *fp;
+ char *buf;
+
+ if (argc < 3) {
+ printf("usage: trace.dat guest_kallsyms_file\n");
+ exit(-1);
+ }
+
+ handle = tracecmd_open(argv[1], 0);
+ if (!handle) {
+ perror(argv[1]);
+ exit(-1);
+ }
+
+ /* Just for kallsyms parsing */
+ guest_tep = tep_alloc();
+ if (!guest_tep)
+ exit(-1);
+
+ if (stat(argv[2], &st) < 0) {
+ perror(argv[2]);
+ exit(-1);
+ }
+
+ buf = malloc(st.st_size + 1);
+ if (!buf)
+ exit(-1);
+
+ fp = fopen(argv[2], "r");
+ if (!fp) {
+ perror(argv[2]);
+ exit(-1);
+ }
+
+ if (fread(buf, st.st_size, 1, fp) < 0) {
+ perror(argv[2]);
+ exit(-1);
+ }
+
+ buf[st.st_size] = '\0';
+
+ if (tep_parse_kallsyms(guest_tep, buf) < 0) {
+ printf("Failed to parse %s\n", argv[2]);
+ exit(-1);
+ }
+ free(buf);
+
+ tracecmd_follow_event(handle, "kvm", "kvm_exit", show_event, guest_tep);
+ tracecmd_follow_event(handle, "kvm", "kvm_entry", show_event, guest_tep);
+
+ tracecmd_iterate_events(handle, NULL, 0, NULL, NULL);
+
+ tep_free(guest_tep);
+ tracecmd_close(handle);
+}
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-log.txt b/Documentation/libtraceevent-log.txt
new file mode 100644
index 0000000..a236e2a
--- /dev/null
+++ b/Documentation/libtraceevent-log.txt
@@ -0,0 +1,90 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_set_loglevel - Set log level of the library
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_loglevel* {
+ TEP_LOG_NONE = 0,
+ TEP_LOG_CRITICAL,
+ TEP_LOG_ERROR,
+ TEP_LOG_WARNING,
+ TEP_LOG_INFO,
+ TEP_LOG_DEBUG,
+ TEP_LOG_ALL
+};
+
+int *tep_set_loglevel*(enum tep_loglevel _level_);
+
+--
+DESCRIPTION
+-----------
+The *tep_set_loglevel()* function sets the level of the library logs that will be printed
+on the console. Library log levels are:
+[verse]
+--
+ _TEP_LOG_NONE_ - Do not print any logs.
+ _TEP_LOG_CRITICAL_ - Print critical logs, problem that may cause a crash.
+ _TEP_LOG_ERROR_ - Print error logs, problem that could break the main logic of an API.
+ _TEP_LOG_WARNING_ - Print warnings, problem that could limit the result of an API.
+ _TEP_LOG_INFO_ - Print information about normal execution of an API.
+ _TEP_LOG_DEBUG_ - Print debug information.
+ _TEP_LOG_ALL_ - Print logs from all levels.
+--
+Setting the log level to specific value means that logs from the previous levels will be printed
+too. For example _TEP_LOG_WARNING_ will print any logs with severity _TEP_LOG_WARNING_,
+_TEP_LOG_ERROR_ and _TEP_LOG_CRITICAL_. The default log level is _TEP_LOG_CRITICAL_.
+
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+
+tep_set_loglevel(TEP_LOG_ALL);
+...
+/* call libtraceevent APIs and observe any logs they produce */
+...
+tep_set_loglevel(TEP_LOG_CRITICAL);
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-long_size.txt b/Documentation/libtraceevent-long_size.txt
new file mode 100644
index 0000000..c4b358a
--- /dev/null
+++ b/Documentation/libtraceevent-long_size.txt
@@ -0,0 +1,78 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_get_long_size, tep_set_long_size - Get / set the size of a long integer on
+the machine, where the trace is generated, in bytes
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_get_long_size*(strucqt tep_handle pass:[*]_tep_);
+void *tep_set_long_size*(struct tep_handle pass:[*]_tep_, int _long_size_);
+--
+
+DESCRIPTION
+-----------
+The *tep_get_long_size()* function returns the size of a long integer on the machine,
+where the trace is generated. The _tep_ argument is trace event parser context.
+
+The *tep_set_long_size()* function sets the size of a long integer on the machine,
+where the trace is generated. The _tep_ argument is trace event parser context.
+The _long_size_ is the size of a long integer, in bytes.
+
+RETURN VALUE
+------------
+The *tep_get_long_size()* function returns the size of a long integer on the machine,
+where the trace is generated, in bytes.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+tep_set_long_size(tep, 4);
+...
+int long_size = tep_get_long_size(tep);
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-page_size.txt b/Documentation/libtraceevent-page_size.txt
new file mode 100644
index 0000000..6d0dd36
--- /dev/null
+++ b/Documentation/libtraceevent-page_size.txt
@@ -0,0 +1,90 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_get_page_size, tep_set_page_size, tep_get_sub_buffer_size - Get / set the size of a memory page on
+the machine, where the trace is generated
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_get_page_size*(struct tep_handle pass:[*]_tep_);
+void *tep_set_page_size*(struct tep_handle pass:[*]_tep_, int _page_size_);
+int *tep_get_sub_buffer_size*(struct tep_handle pass:[*]_tep_);
+--
+
+DESCRIPTION
+-----------
+The *tep_get_page_size()* function returns the size of a memory page on
+the machine, where the trace is generated. The _tep_ argument is trace
+event parser context.
+
+The *tep_set_page_size()* function stores in the _tep_ context the size of a
+memory page on the machine, where the trace is generated.
+The _tep_ argument is trace event parser context.
+The _page_size_ argument is the size of a memory page, in bytes.
+
+The *tep_get_sub_buffer_size()* returns the size of each "sub buffer" of the
+ring buffer. The Linux kernel ring buffer is broken up into sections called
+sub buffers. This returns the size of those buffers.
+
+RETURN VALUE
+------------
+The *tep_get_page_size()* function returns size of the memory page, in bytes.
+
+The *tep_get_sub_buffer_size()* function returns the number of bytes each sub
+buffer is made up of.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <unistd.h>
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+ int page_size = getpagesize();
+
+ tep_set_page_size(tep, page_size);
+
+ printf("The page size for this machine is %d\n", tep_get_page_size(tep));
+
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-parse-files.txt b/Documentation/libtraceevent-parse-files.txt
new file mode 100644
index 0000000..bb2facb
--- /dev/null
+++ b/Documentation/libtraceevent-parse-files.txt
@@ -0,0 +1,149 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_parse_saved_cmdlines, tep_parse_printk_formats, tep_parse_kallsyms
+- Parsing functions to load mappings
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_parse_saved_cmdlines*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_);
+int *tep_parse_printk_formats*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_);
+int *tep_parse_kallsyms*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_);
+--
+
+DESCRIPTION
+-----------
+*tep_parse_saved_cmdlines()* is a helper function to parse content in the tracefs
+file system of the "saved_cmdlines" file (stored in a string buffer passed in by _buf_)
+and loads the mapping of the process IDs (pid) to the comm names in the
+_tep_ handler. The events store the pid and this is used to be able to show the
+process names associated to those process ids. It parses the string _buf_ that
+holds the content of saved_cmdlines and ends with a nul character ('\0').
+
+*tep_parse_printk_formats()* is a helper function to parse content in the tracefs
+file system of the "printk_formats" file (stored in a string buffer passed in by _buf_)
+and loads the mapping of addresses of strings that may be referenced by events.
+Events only store the address of constant strings in the kernel, and the mapping
+of their address to the string is exported to user space in the printk_formats
+file. It parses the string _buf_ that holds the content of printk_formats and
+ends with a nul character ('\0').
+
+*tep_parse_kallsyms()* is a helper function to parse the Linux kernel /proc/kallsyms format
+(stored in a string buffer passed in by _buf_) and load the functions into the
+_tep_ handler such that function IP addresses can be mapped to their name when
+parsing events with %pS in the print format field. It parses the string _buf_ that
+holds the content of /proc/kallsyms and ends with a nul character ('\0').
+
+RETURN VALUE
+------------
+The *tep_parse_saved_cmdlines*() function returns 0 in case of success, or -1
+in case of an error.
+
+The *tep_parse_printk_formats*() function returns 0 in case of success, or -1
+in case of an error.
+
+The *tep_parse_kallsyms*() function returns 0 in case of success, or -1
+in case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+...
+#include <event-parse.h>
+#include <tracefs.h>
+#include <stdlib.h>
+
+int load_cmdlines(struct tep_handle *tep)
+{
+ char *buf = NULL;
+ int r;
+
+ buf = tracefs_instance_file_read(NULL, "saved_cmdlines", NULL);
+ if (!buf)
+ return -1;
+ r = tep_parse_saved_cmdlines(tep, buf);
+ free(buf);
+ return r;
+}
+
+int load_print_strings(struct tep_handle *tep)
+{
+ char *buf = NULL;
+ int r;
+
+ buf = tracefs_instance_file_read(NULL, "printk_formats", NULL);
+ if (!buf)
+ return -1;
+ r = tep_parse_printk_formats(tep, buf);
+ free(buf);
+ return r;
+}
+
+int load_kallsyms(struct tep_handle *tep)
+{
+ char *line = NULL;
+ char *buf = NULL;
+ size_t sz = 0;
+ FILE *fp;
+ int len = 0;
+ int r;
+
+ fp = fopen("/proc/kallsyms", "r");
+ while ((r = getline(&line, &sz, fp)) >= 0) {
+ buf = realloc(buf, len + r + 1);
+ memcpy(buf + len, line, r);
+ len += r;
+ }
+ free(line);
+ fclose(fp);
+ if (!buf)
+ return -1;
+ buf[len] = 0;
+
+ r = tep_parse_kallsyms(tep, buf);
+ free(buf);
+ return r;
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1), *tep_register_comm*(3), *tep_register_function*(3),
+*tep_register_print_string*(3)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, coauthor of *libtraceevent*.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-parse_event.txt b/Documentation/libtraceevent-parse_event.txt
new file mode 100644
index 0000000..466d157
--- /dev/null
+++ b/Documentation/libtraceevent-parse_event.txt
@@ -0,0 +1,90 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_parse_event, tep_parse_format - Parse the event format information
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum tep_errno *tep_parse_event*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
+enum tep_errno *tep_parse_format*(struct tep_handle pass:[*]_tep_, struct tep_event pass:[*]pass:[*]_eventp_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
+--
+
+DESCRIPTION
+-----------
+The *tep_parse_event()* function parses the event format and creates an event
+structure to quickly parse raw data for a given event. The _tep_ argument is
+the trace event parser context. The created event structure is stored in the
+_tep_ context. The _buf_ argument is a buffer with _size_, where the event
+format data is. The event format data can be taken from
+tracefs/events/.../.../format files. The _sys_ argument is the system of
+the event.
+
+The *tep_parse_format()* function does the same as *tep_parse_event()*. The only
+difference is in the extra _eventp_ argument, where the newly created event
+structure is returned.
+
+RETURN VALUE
+------------
+Both *tep_parse_event()* and *tep_parse_format()* functions return 0 on success,
+or TEP_ERRNO__... in case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+char *buf;
+int size;
+struct tep_event *event = NULL;
+buf = read_file("/sys/kernel/tracing/events/ftrace/print/format", &size);
+if (tep_parse_event(tep, buf, size, "ftrace") != 0) {
+ /* Failed to parse the ftrace print format */
+}
+
+if (tep_parse_format(tep, &event, buf, size, "ftrace") != 0) {
+ /* Failed to parse the ftrace print format */
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-parse_head.txt b/Documentation/libtraceevent-parse_head.txt
new file mode 100644
index 0000000..22b0a4f
--- /dev/null
+++ b/Documentation/libtraceevent-parse_head.txt
@@ -0,0 +1,82 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_parse_header_page - Parses the data stored in the header page.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_);
+--
+
+DESCRIPTION
+-----------
+The *tep_parse_header_page()* function parses the header page data from _buf_,
+and initializes the _tep_, trace event parser context, with it. The buffer
+_buf_ is with _size_, and is supposed to be copied from
+tracefs/events/header_page.
+
+Some old kernels do not have header page info, in this case the
+*tep_parse_header_page()* function can be called with _size_ equal to 0. The
+_tep_ context is initialized with default values. The _long_size_ can be used in
+this use case, to set the size of a long integer to be used.
+
+RETURN VALUE
+------------
+The *tep_parse_header_page()* function returns 0 in case of success, or -1
+in case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+char *buf;
+int size;
+buf = read_file("/sys/kernel/tracing/events/header_page", &size);
+if (tep_parse_header_page(tep, buf, size, sizeof(unsigned long)) != 0) {
+ /* Failed to parse the header page */
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-plugins.txt b/Documentation/libtraceevent-plugins.txt
new file mode 100644
index 0000000..4ca78d4
--- /dev/null
+++ b/Documentation/libtraceevent-plugins.txt
@@ -0,0 +1,150 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_load_plugins, tep_unload_plugins, tep_load_plugins_hook, tep_add_plugin_path,
+tep_plugin_add_option - Load / unload traceevent plugins.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+struct tep_plugin_list pass:[*]*tep_load_plugins*(struct tep_handle pass:[*]_tep_);
+void *tep_unload_plugins*(struct tep_plugin_list pass:[*]_plugin_list_, struct tep_handle pass:[*]_tep_);
+void *tep_load_plugins_hook*(struct tep_handle pass:[*]_tep_, const char pass:[*]_suffix_,
+ void (pass:[*]_load_plugin_)(struct tep_handle pass:[*]tep,
+ const char pass:[*]path,
+ const char pass:[*]name,
+ void pass:[*]data),
+ void pass:[*]_data_);
+int *tep_add_plugin_path*(struct tep_handle pass:[*]tep, char pass:[*]path,
+ enum tep_plugin_load_priority prio);
+int *tep_plugin_add_option*(const char pass:[*]_name_, const char pass:[*]_val_);
+--
+
+DESCRIPTION
+-----------
+The *tep_load_plugins()* function loads all plugins, located in the plugin
+directories. The _tep_ argument is trace event parser context.
+The plugin directories are :
+[verse]
+--
+ - Directories, specified in _tep_->plugins_dir with priority TEP_PLUGIN_FIRST
+ - System's plugin directory, defined at the library compile time. It
+ depends on the library installation prefix and usually is
+ _(install_preffix)/lib/traceevent/plugins_
+ - Directory, defined by the environment variable _TRACEEVENT_PLUGIN_DIR_
+ - User's plugin directory, located at _~/.local/lib/traceevent/plugins_
+ - Directories, specified in _tep_->plugins_dir with priority TEP_PLUGIN_LAST
+--
+Loading of plugins can be controlled by the _tep_flags_, using the
+*tep_set_flag()* API:
+[verse]
+--
+ _TEP_DISABLE_SYS_PLUGINS_ - do not load plugins, located in
+ the system's plugin directory.
+ _TEP_DISABLE_PLUGINS_ - do not load any plugins.
+--
+The *tep_set_flag()* API needs to be called before *tep_load_plugins()*, if
+loading of all plugins is not the desired case.
+
+The *tep_unload_plugins()* function unloads the plugins, previously loaded by
+*tep_load_plugins()*. The _tep_ argument is trace event parser context. The
+_plugin_list_ is the list of loaded plugins, returned by
+the *tep_load_plugins()* function.
+
+The *tep_load_plugins_hook()* function walks through all directories with plugins
+and calls user specified *load_plugin()* hook for each plugin file. Only files
+with given _suffix_ are considered to be plugins. The _data_ is a user specified
+context, passed to *load_plugin()*. Directories and the walk order are the same
+as in *tep_load_plugins()* API.
+
+The *tep_add_plugin_path()* functions adds additional directories with plugins in
+the _tep_->plugins_dir list. It must be called before *tep_load_plugins()* in order
+for the plugins from the new directories to be loaded. The _tep_ argument is
+the trace event parser context. The _path_ is the full path to the new plugin
+directory. The _prio_ argument specifies the loading priority order for the
+new directory of plugins. The loading priority is important in case of different
+versions of the same plugin located in multiple plugin directories.The last loaded
+plugin wins. The priority can be:
+[verse]
+--
+ _TEP_PLUGIN_FIRST_ - Load plugins from this directory first
+ _TEP_PLUGIN_LAST_ - Load plugins from this directory last
+--
+Where the plugins in TEP_PLUGIN_LAST" will take precedence over the
+plugins in the other directories.
+
+The *tep_plugin_add_option()* sets options defined by a plugin. The _name_ is the
+name of the option to set to _val_. Plugins can add options to change its behavior
+and *tep_plugin_add_option()* is used by the application to make those modifications.
+
+
+RETURN VALUE
+------------
+The *tep_load_plugins()* function returns a list of successfully loaded plugins,
+or NULL in case no plugins are loaded.
+The *tep_add_plugin_path()* function returns -1 in case of an error, 0 otherwise.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+tep_add_plugin_path(tep, "~/dev_plugins", TEP_PLUGIN_LAST);
+...
+struct tep_plugin_list *plugins = tep_load_plugins(tep);
+if (plugins == NULL) {
+ /* no plugins are loaded */
+}
+...
+tep_unload_plugins(plugins, tep);
+...
+void print_plugin(struct tep_handle *tep, const char *path,
+ const char *name, void *data)
+{
+ pritnf("Found libtraceevent plugin %s/%s\n", path, name);
+}
+...
+tep_load_plugins_hook(tep, ".so", print_plugin, NULL);
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1), *tep_set_flag*(3)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-record_parse.txt b/Documentation/libtraceevent-record_parse.txt
new file mode 100644
index 0000000..dbc3a76
--- /dev/null
+++ b/Documentation/libtraceevent-record_parse.txt
@@ -0,0 +1,137 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_data_type, tep_data_pid,tep_data_preempt_count, tep_data_flags -
+Extract common fields from a record.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *trace_flag_type* {
+ _TRACE_FLAG_IRQS_OFF_,
+ _TRACE_FLAG_IRQS_NOSUPPORT_,
+ _TRACE_FLAG_NEED_RESCHED_,
+ _TRACE_FLAG_HARDIRQ_,
+ _TRACE_FLAG_SOFTIRQ_,
+};
+
+int *tep_data_type*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+int *tep_data_pid*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+int *tep_data_preempt_count*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+int *tep_data_flags*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+--
+
+DESCRIPTION
+-----------
+This set of functions can be used to extract common fields from a record.
+
+The *tep_data_type()* function gets the event id from the record _rec_.
+It reads the "common_type" field. The _tep_ argument is the trace event parser
+context.
+
+The *tep_data_pid()* function gets the process id from the record _rec_.
+It reads the "common_pid" field. The _tep_ argument is the trace event parser
+context.
+
+The *tep_data_preempt_count()* function gets the preemption count from the
+record _rec_. It reads the "common_preempt_count" field. The _tep_ argument is
+the trace event parser context.
+
+The *tep_data_flags()* function gets the latency flags from the record _rec_.
+It reads the "common_flags" field. The _tep_ argument is the trace event parser
+context. Supported latency flags are:
+[verse]
+--
+ _TRACE_FLAG_IRQS_OFF_, Interrupts are disabled.
+ _TRACE_FLAG_IRQS_NOSUPPORT_, Reading IRQ flag is not supported by the architecture.
+ _TRACE_FLAG_NEED_RESCHED_, Task needs rescheduling.
+ _TRACE_FLAG_HARDIRQ_, Hard IRQ is running.
+ _TRACE_FLAG_SOFTIRQ_, Soft IRQ is running.
+--
+
+RETURN VALUE
+------------
+The *tep_data_type()* function returns an integer, representing the event id.
+
+The *tep_data_pid()* function returns an integer, representing the process id
+
+The *tep_data_preempt_count()* function returns an integer, representing the
+preemption count.
+
+The *tep_data_flags()* function returns an integer, representing the latency
+flags. Look at the _trace_flag_type_ enum for supported flags.
+
+All these functions in case of an error return a negative integer.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+void process_record(struct tep_record *record)
+{
+ int data;
+
+ data = tep_data_type(tep, record);
+ if (data >= 0) {
+ /* Got the ID of the event */
+ }
+
+ data = tep_data_pid(tep, record);
+ if (data >= 0) {
+ /* Got the process ID */
+ }
+
+ data = tep_data_preempt_count(tep, record);
+ if (data >= 0) {
+ /* Got the preemption count */
+ }
+
+ data = tep_data_flags(tep, record);
+ if (data >= 0) {
+ /* Got the latency flags */
+ }
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-reg_event_handler.txt b/Documentation/libtraceevent-reg_event_handler.txt
new file mode 100644
index 0000000..90ab7f0
--- /dev/null
+++ b/Documentation/libtraceevent-reg_event_handler.txt
@@ -0,0 +1,156 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_register_event_handler, tep_unregister_event_handler - Register /
+unregisters a callback function to parse an event information.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_reg_handler* {
+ _TEP_REGISTER_SUCCESS_,
+ _TEP_REGISTER_SUCCESS_OVERWRITE_,
+};
+
+int *tep_register_event_handler*(struct tep_handle pass:[*]_tep_, int _id_, const char pass:[*]_sys_name_, const char pass:[*]_event_name_, tep_event_handler_func _func_, void pass:[*]_context_);
+int *tep_unregister_event_handler*(struct tep_handle pass:[*]tep, int id, const char pass:[*]sys_name, const char pass:[*]event_name, tep_event_handler_func func, void pass:[*]_context_);
+
+typedef int (*pass:[*]tep_event_handler_func*)(struct trace_seq pass:[*]s, struct tep_record pass:[*]record, struct tep_event pass:[*]event, void pass:[*]context);
+--
+
+DESCRIPTION
+-----------
+The *tep_register_event_handler()* function registers a handler function,
+which is going to be called to parse the information for a given event.
+The _tep_ argument is the trace event parser context. The _id_ argument is
+the id of the event. The _sys_name_ argument is the name of the system,
+the event belongs to. The _event_name_ argument is the name of the event.
+If _id_ is >= 0, it is used to find the event, otherwise _sys_name_ and
+_event_name_ are used. The _func_ is a pointer to the function, which is going
+to be called to parse the event information. The _context_ argument is a pointer
+to the context data, which will be passed to the _func_. If a handler function
+for the same event is already registered, it will be overridden with the new
+one. This mechanism allows a developer to override the parsing of a given event.
+If for some reason the default print format is not sufficient, the developer
+can register a function for an event to be used to parse the data instead.
+
+The *tep_unregister_event_handler()* function unregisters the handler function,
+previously registered with *tep_register_event_handler()*. The _tep_ argument
+is the trace event parser context. The _id_, _sys_name_, _event_name_, _func_,
+and _context_ are the same arguments, as when the callback function _func_ was
+registered.
+
+The _tep_event_handler_func_ is the type of the custom event handler
+function. The _s_ argument is the trace sequence, it can be used to create a
+custom string, describing the event. A _record_ to get the event from is passed
+as input parameter and also the _event_ - the handle to the record's event. The
+_context_ is custom context, set when the custom event handler is registered.
+
+RETURN VALUE
+------------
+The *tep_register_event_handler()* function returns _TEP_REGISTER_SUCCESS_
+if the new handler is registered successfully or
+_TEP_REGISTER_SUCCESS_OVERWRITE_ if an existing handler is overwritten.
+If there is not enough memory to complete the registration,
+TEP_ERRNO__MEM_ALLOC_FAILED is returned.
+
+The *tep_unregister_event_handler()* function returns 0 if _func_ was removed
+successful or, -1 if the event was not found.
+
+The _tep_event_handler_func_ should return -1 in case of an error,
+or 0 otherwise.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+int timer_expire_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ trace_seq_printf(s, "hrtimer=");
+
+ if (tep_print_num_field(s, "0x%llx", event, "timer", record, 0) == -1)
+ tep_print_num_field(s, "0x%llx", event, "hrtimer", record, 1);
+
+ trace_seq_printf(s, " now=");
+
+ tep_print_num_field(s, "%llu", event, "now", record, 1);
+
+ tep_print_func_field(s, " function=%s", event, "function", record, 0);
+
+ return 0;
+}
+...
+ int ret;
+
+ ret = tep_register_event_handler(tep, -1, "timer", "hrtimer_expire_entry",
+ timer_expire_handler, NULL);
+ if (ret < 0) {
+ char buf[32];
+
+ tep_strerror(tep, ret, buf, 32)
+ printf("Failed to register handler for hrtimer_expire_entry: %s\n", buf);
+ } else {
+ switch (ret) {
+ case TEP_REGISTER_SUCCESS:
+ printf ("Registered handler for hrtimer_expire_entry\n");
+ break;
+ case TEP_REGISTER_SUCCESS_OVERWRITE:
+ printf ("Overwrote handler for hrtimer_expire_entry\n");
+ break;
+ }
+ }
+...
+ ret = tep_unregister_event_handler(tep, -1, "timer", "hrtimer_expire_entry",
+ timer_expire_handler, NULL);
+ if ( ret )
+ printf ("Failed to unregister handler for hrtimer_expire_entry\n");
+
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences
+ related APIs. Trace sequences are used to allow a function to call
+ several other functions to create a string of data to use.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-reg_print_func.txt b/Documentation/libtraceevent-reg_print_func.txt
new file mode 100644
index 0000000..b3c8491
--- /dev/null
+++ b/Documentation/libtraceevent-reg_print_func.txt
@@ -0,0 +1,155 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_register_print_function,tep_unregister_print_function -
+Registers / Unregisters a helper function.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_func_arg_type* {
+ TEP_FUNC_ARG_VOID,
+ TEP_FUNC_ARG_INT,
+ TEP_FUNC_ARG_LONG,
+ TEP_FUNC_ARG_STRING,
+ TEP_FUNC_ARG_PTR,
+ TEP_FUNC_ARG_MAX_TYPES
+};
+
+typedef unsigned long long (*pass:[*]tep_func_handler*)(struct trace_seq pass:[*]s, unsigned long long pass:[*]args);
+
+int *tep_register_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, enum tep_func_arg_type _ret_type_, char pass:[*]_name_, _..._);
+int *tep_unregister_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, char pass:[*]_name_);
+--
+
+DESCRIPTION
+-----------
+Some events may have helper functions in the print format arguments.
+This allows a plugin to dynamically create a way to process one of
+these functions.
+
+The *tep_register_print_function()* registers such helper function. The _tep_
+argument is the trace event parser context. The _func_ argument is a pointer
+to the helper function. The _ret_type_ argument is the return type of the
+helper function, value from the _tep_func_arg_type_ enum. The _name_ is the name
+of the helper function, as seen in the print format arguments. The _..._ is a
+variable list of _tep_func_arg_type_ enums, the _func_ function arguments.
+This list must end with _TEP_FUNC_ARG_VOID_. See 'EXAMPLE' section.
+
+The *tep_unregister_print_function()* unregisters a helper function, previously
+registered with *tep_register_print_function()*. The _tep_ argument is the
+trace event parser context. The _func_ and _name_ arguments are the same, used
+when the helper function was registered.
+
+The _tep_func_handler_ is the type of the helper function. The _s_ argument is
+the trace sequence, it can be used to create a custom string.
+The _args_ is a list of arguments, defined when the helper function was
+registered.
+
+RETURN VALUE
+------------
+The *tep_register_print_function()* function returns 0 in case of success.
+In case of an error, TEP_ERRNO_... code is returned.
+
+The *tep_unregister_print_function()* returns 0 in case of success, or -1 in
+case of an error.
+
+EXAMPLE
+-------
+Some events have internal functions calls, that appear in the print format
+output. For example "tracefs/events/i915/g4x_wm/format" has:
+[source,c]
+--
+print fmt: "pipe %c, frame=%u, scanline=%u, wm %d/%d/%d, sr %s/%d/%d/%d, hpll %s/%d/%d/%d, fbc %s",
+ ((REC->pipe) + 'A'), REC->frame, REC->scanline, REC->primary,
+ REC->sprite, REC->cursor, yesno(REC->cxsr), REC->sr_plane,
+ REC->sr_cursor, REC->sr_fbc, yesno(REC->hpll), REC->hpll_plane,
+ REC->hpll_cursor, REC->hpll_fbc, yesno(REC->fbc)
+--
+Notice the call to function *yesno()* in the print arguments. In the kernel
+context, this function has the following implementation:
+[source,c]
+--
+static const char *yesno(int x)
+{
+ static const char *yes = "yes";
+ static const char *no = "no";
+
+ return x ? yes : no;
+}
+--
+The user space event parser has no idea how to handle this *yesno()* function.
+The *tep_register_print_function()* API can be used to register a user space
+helper function, mapped to the kernel's *yesno()*:
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+static const char *yes_no_helper(int x)
+{
+ return x ? "yes" : "no";
+}
+...
+ if ( tep_register_print_function(tep,
+ yes_no_helper,
+ TEP_FUNC_ARG_STRING,
+ "yesno",
+ TEP_FUNC_ARG_INT,
+ TEP_FUNC_ARG_VOID) != 0) {
+ /* Failed to register yes_no_helper function */
+ }
+
+/*
+ Now, when the event parser encounters this yesno() function, it will know
+ how to handle it.
+*/
+...
+ if (tep_unregister_print_function(tep, yes_no_helper, "yesno") != 0) {
+ /* Failed to unregister yes_no_helper function */
+ }
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences
+ related APIs. Trace sequences are used to allow a function to call
+ several other functions to create a string of data to use.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-set_flag.txt b/Documentation/libtraceevent-set_flag.txt
new file mode 100644
index 0000000..c11dd00
--- /dev/null
+++ b/Documentation/libtraceevent-set_flag.txt
@@ -0,0 +1,104 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_set_flag, tep_clear_flag, tep_test_flag -
+Manage flags of trace event parser context.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+enum *tep_flag* {
+ _TEP_NSEC_OUTPUT_,
+ _TEP_DISABLE_SYS_PLUGINS_,
+ _TEP_DISABLE_PLUGINS_
+};
+void *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
+void *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
+bool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
+--
+
+DESCRIPTION
+-----------
+Trace event parser context flags are defined in *enum tep_flag*:
+[verse]
+--
+_TEP_NSEC_OUTPUT_ - print event's timestamp in nano seconds, instead of micro seconds.
+_TEP_DISABLE_SYS_PLUGINS_ - disable plugins, located in system's plugin
+ directory. This directory is defined at library compile
+ time, and usually depends on library installation
+ prefix: (install_preffix)/lib/traceevent/plugins
+_TEP_DISABLE_PLUGINS_ - disable all library plugins:
+ - in system's plugin directory
+ - in directory, defined by the environment variable _TRACEEVENT_PLUGIN_DIR_
+ - in user's home directory, _~/.traceevent/plugins_
+--
+Note: plugin related flags must me set before calling *tep_load_plugins()* API.
+
+The *tep_set_flag()* function sets _flag_ to _tep_ context.
+
+The *tep_clear_flag()* function clears _flag_ from _tep_ context.
+
+The *tep_test_flag()* function tests if _flag_ is set to _tep_ context.
+
+RETURN VALUE
+------------
+*tep_test_flag()* function returns true if _flag_ is set, false otherwise.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+/* Print timestamps in nanoseconds */
+tep_set_flag(tep, TEP_NSEC_OUTPUT);
+...
+if (tep_test_flag(tep, TEP_NSEC_OUTPUT)) {
+ /* print timestamps in nanoseconds */
+} else {
+ /* print timestamps in microseconds */
+}
+...
+/* Print timestamps in microseconds */
+tep_clear_flag(tep, TEP_NSEC_OUTPUT);
+...
+--
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-strerror.txt b/Documentation/libtraceevent-strerror.txt
new file mode 100644
index 0000000..fa53344
--- /dev/null
+++ b/Documentation/libtraceevent-strerror.txt
@@ -0,0 +1,85 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_strerror - Returns a string describing regular errno and tep error number.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_);
+
+--
+DESCRIPTION
+-----------
+The *tep_strerror()* function converts tep error number into a human
+readable string.
+The _tep_ argument is trace event parser context. The _errnum_ is a regular
+errno, defined in errno.h, or a tep error number. The string, describing this
+error number is copied in the _buf_ argument. The _buflen_ argument is
+the size of the _buf_.
+
+It as a thread safe wrapper around strerror_r(). The library function has two
+different behaviors - POSIX and GNU specific. The *tep_strerror()* API always
+behaves as the POSIX version - the error string is copied in the user supplied
+buffer.
+
+RETURN VALUE
+------------
+The *tep_strerror()* function returns 0, if a valid _errnum_ is passed and the
+string is copied into _buf_. If _errnum_ is not a valid error number,
+-1 is returned and _buf_ is not modified.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+char buf[32];
+char *pool = calloc(1, 128);
+if (tep == NULL) {
+ tep_strerror(tep, TEP_ERRNO__MEM_ALLOC_FAILED, buf, 32);
+ printf ("The pool is not initialized, %s", buf);
+}
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent-tseq.txt b/Documentation/libtraceevent-tseq.txt
new file mode 100644
index 0000000..03dd748
--- /dev/null
+++ b/Documentation/libtraceevent-tseq.txt
@@ -0,0 +1,158 @@
+libtraceevent(3)
+================
+
+NAME
+----
+trace_seq_init, trace_seq_destroy, trace_seq_reset, trace_seq_terminate,
+trace_seq_putc, trace_seq_puts, trace_seq_printf, trace_seq_vprintf,
+trace_seq_do_fprintf, trace_seq_do_printf -
+Initialize / destroy a trace sequence.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+*#include <trace-seq.h>*
+
+void *trace_seq_init*(struct trace_seq pass:[*]_s_);
+void *trace_seq_destroy*(struct trace_seq pass:[*]_s_);
+void *trace_seq_reset*(struct trace_seq pass:[*]_s_);
+void *trace_seq_terminate*(struct trace_seq pass:[*]_s_);
+int *trace_seq_putc*(struct trace_seq pass:[*]_s_, unsigned char _c_);
+int *trace_seq_puts*(struct trace_seq pass:[*]_s_, const char pass:[*]_str_);
+int *trace_seq_printf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, _..._);
+int *trace_seq_vprintf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, va_list _args_);
+int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_);
+int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_);
+--
+
+DESCRIPTION
+-----------
+Trace sequences are used to allow a function to call several other functions
+to create a string of data to use.
+
+The *trace_seq_init()* function initializes the trace sequence _s_.
+
+The *trace_seq_destroy()* function destroys the trace sequence _s_ and frees
+all its resources that it had used.
+
+The *trace_seq_reset()* function re-initializes the trace sequence _s_. All
+characters already written in _s_ will be deleted.
+
+The *trace_seq_terminate()* function terminates the trace sequence _s_. It puts
+the null character pass:['\0'] at the end of the buffer.
+
+The *trace_seq_putc()* function puts a single character _c_ in the trace
+sequence _s_.
+
+The *trace_seq_puts()* function puts a NULL terminated string _str_ in the
+trace sequence _s_.
+
+The *trace_seq_printf()* function puts a formated string _fmt _with
+variable arguments _..._ in the trace sequence _s_.
+
+The *trace_seq_vprintf()* function puts a formated string _fmt _with
+list of arguments _args_ in the trace sequence _s_.
+
+The *trace_seq_do_printf()* function prints the buffer of trace sequence _s_ to
+the standard output stdout.
+
+The *trace_seq_do_fprintf()* function prints the buffer of trace sequence _s_
+to the given file _fp_.
+
+RETURN VALUE
+------------
+Both *trace_seq_putc()* and *trace_seq_puts()* functions return the number of
+characters put in the trace sequence, or 0 in case of an error
+
+Both *trace_seq_printf()* and *trace_seq_vprintf()* functions return 0 if the
+trace oversizes the buffer's free space, the number of characters printed, or
+a negative value in case of an error.
+
+Both *trace_seq_do_printf()* and *trace_seq_do_fprintf()* functions return the
+number of printed characters, or -1 in case of an error.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+#include <trace-seq.h>
+...
+struct trace_seq seq;
+trace_seq_init(&seq);
+...
+void foo_seq_print(struct trace_seq *tseq, char *format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ if (trace_seq_vprintf(tseq, format, ap) <= 0) {
+ /* Failed to print in the trace sequence */
+ }
+ va_end(ap);
+}
+
+trace_seq_reset(&seq);
+
+char *str = " MAN page example";
+if (trace_seq_puts(&seq, str) != strlen(str)) {
+ /* Failed to put str in the trace sequence */
+}
+if (trace_seq_putc(&seq, ':') != 1) {
+ /* Failed to put ':' in the trace sequence */
+}
+if (trace_seq_printf(&seq, " trace sequence: %d", 1) <= 0) {
+ /* Failed to print in the trace sequence */
+}
+foo_seq_print( &seq, " %d\n", 2);
+
+trace_seq_terminate(&seq);
+...
+
+if (trace_seq_do_printf(&seq) < 0 ) {
+ /* Failed to print the sequence buffer to the standard output */
+}
+FILE *fp = fopen("trace.txt", "w");
+if (trace_seq_do_fprintf(&seq, fp) < 0 ) [
+ /* Failed to print the sequence buffer to the trace.txt file */
+}
+
+trace_seq_destroy(&seq);
+...
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences related APIs.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*libtraceevent*(3), *trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/libtraceevent.txt b/Documentation/libtraceevent.txt
new file mode 100644
index 0000000..0502769
--- /dev/null
+++ b/Documentation/libtraceevent.txt
@@ -0,0 +1,246 @@
+libtraceevent(3)
+================
+
+NAME
+----
+libtraceevent - Linux kernel trace event library
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+Management of tep handler data structure and access of its members:
+ struct tep_handle pass:[*]*tep_alloc*(void);
+ void *tep_free*(struct tep_handle pass:[*]_tep_);
+ void *tep_ref*(struct tep_handle pass:[*]_tep_);
+ void *tep_unref*(struct tep_handle pass:[*]_tep_);
+ int *tep_get_ref*(struct tep_handle pass:[*]_tep_);
+ void *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
+ void *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
+ bool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flags_);
+ int *tep_get_cpus*(struct tep_handle pass:[*]_tep_);
+ void *tep_set_cpus*(struct tep_handle pass:[*]_tep_, int _cpus_);
+ int *tep_get_long_size*(strucqt tep_handle pass:[*]_tep_);
+ void *tep_set_long_size*(struct tep_handle pass:[*]_tep_, int _long_size_);
+ int *tep_get_page_size*(struct tep_handle pass:[*]_tep_);
+ void *tep_set_page_size*(struct tep_handle pass:[*]_tep_, int _page_size_);
+ int *tep_get_sub_buffer_size*(struct tep_handle pass:[*]_tep_);
+ int *tep_get_header_page_size*(struct tep_handle pass:[*]_tep_);
+ int *tep_get_header_timestamp_size*(struct tep_handle pass:[*]_tep_);
+ bool *tep_is_old_format*(struct tep_handle pass:[*]_tep_);
+ int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_);
+ struct kbuffer pass:[*]*tep_kbuffer*(struct tep_handle pass:[*]:_tep_);
+
+Register / unregister APIs:
+ int *tep_register_function*(struct tep_handle pass:[*]_tep_, char pass:[*]_name_, unsigned long long _addr_, char pass:[*]_mod_);
+ int *tep_register_event_handler*(struct tep_handle pass:[*]_tep_, int _id_, const char pass:[*]_sys_name_, const char pass:[*]_event_name_, tep_event_handler_func _func_, void pass:[*]_context_);
+ int *tep_unregister_event_handler*(struct tep_handle pass:[*]tep, int id, const char pass:[*]sys_name, const char pass:[*]event_name, tep_event_handler_func func, void pass:[*]_context_);
+ int *tep_register_print_string*(struct tep_handle pass:[*]_tep_, const char pass:[*]_fmt_, unsigned long long _addr_);
+ int *tep_register_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, enum tep_func_arg_type _ret_type_, char pass:[*]_name_, _..._);
+ int *tep_unregister_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, char pass:[*]_name_);
+ int *tep_get_function_count*(struct tep_handle *_tep_);
+
+Trace printk parsing:
+ void *tep_print_printk*(struct tep_handle pass:[*]tep);
+ void *tep_print_funcs*(struct tep_handle pass:[*]tep);
+ void *tep_set_test_filters*(struct tep_handle pass:[*]tep, int test_filters);
+ void *tep_plugin_print_options*(struct trace_seq pass:[*]s);
+ int *tep_plugin_add_option*(const char pass:[*]_name_, const char pass:[*]_val_);
+
+Meta data parsing:
+ int *tep_parse_saved_cmdlines*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_);
+ int *tep_parse_printk_formats*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_);
+ int *tep_parse_kallsyms*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_);
+
+Plugins management:
+ struct tep_plugin_list pass:[*]*tep_load_plugins*(struct tep_handle pass:[*]_tep_);
+ void *tep_unload_plugins*(struct tep_plugin_list pass:[*]_plugin_list_, struct tep_handle pass:[*]_tep_);
+ char pass:[*]pass:[*]*tep_plugin_list_options*(void);
+ void *tep_plugin_free_options_list*(char pass:[*]pass:[*]_list_);
+ int *tep_plugin_add_options*(const char pass:[*]_name_, struct tep_plugin_option pass:[*]_options_);
+ void *tep_plugin_remove_options*(struct tep_plugin_option pass:[*]_options_);
+ void *tep_print_plugins*(struct trace_seq pass:[*]_s_, const char pass:[*]_prefix_, const char pass:[*]_suffix_, const struct tep_plugin_list pass:[*]_list_);
+ void *tep_load_plugins_hook*(struct tep_handle pass:[*]_tep_, const char pass:[*]_suffix_,
+ void (pass:[*]_load_plugin_)(struct tep_handle pass:[*]tep,
+ const char pass:[*]path,
+ const char pass:[*]name,
+ void pass:[*]data),
+ void pass:[*]_data_);
+ int *tep_add_plugin_path*(struct tep_handle pass:[*]tep, char pass:[*]path,
+ enum tep_plugin_load_priority prio);
+
+Event related APIs:
+ struct tep_event pass:[*]*tep_get_event*(struct tep_handle pass:[*]_tep_, int _index_);
+ struct tep_event pass:[*]*tep_get_first_event*(struct tep_handle pass:[*]_tep_);
+ int *tep_get_events_count*(struct tep_handle pass:[*]_tep_);
+ struct tep_event pass:[*]pass:[*]*tep_list_events*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
+ struct tep_event pass:[*]pass:[*]*tep_list_events_copy*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
+ void *tep_print_event*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, const char pass:[*]_fmt_, _..._);
+
+Event finding:
+ struct tep_event pass:[*]*tep_find_event*(struct tep_handle pass:[*]_tep_, int _id_);
+ struct tep_event pass:[*]*tep_find_event_by_name*(struct tep_handle pass:[*]_tep_, const char pass:[*]_sys_, const char pass:[*]_name_);
+ struct tep_event pass:[*]*tep_find_event_by_record*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_record_);
+
+Parsing of event files:
+ int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_);
+ enum tep_errno *tep_parse_event*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
+ enum tep_errno *tep_parse_format*(struct tep_handle pass:[*]_tep_, struct tep_event pass:[*]pass:[*]_eventp_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
+
+APIs related to fields from event's format files:
+ struct tep_format_field pass:[*]pass:[*]*tep_event_common_fields*(struct tep_event pass:[*]_event_);
+ struct tep_format_field pass:[*]pass:[*]*tep_event_fields*(struct tep_event pass:[*]_event_);
+ void pass:[*]*tep_get_field_raw*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int pass:[*]_len_, int _err_);
+ int *tep_get_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
+ int *tep_get_common_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
+ int *tep_get_any_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
+ int *tep_read_number_field*(struct tep_format_field pass:[*]_field_, const void pass:[*]_data_, unsigned long long pass:[*]_value_);
+
+Event fields printing:
+ void *tep_print_field_content*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int size, struct tep_format_field pass:[*]_field_);
+ void *tep_print_fields*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int _size_, struct tep_event pass:[*]_event_);
+ int *tep_print_num_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
+ int *tep_print_func_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
+ void *tep_record_print_fields*(struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, struct tep_event pass:[*]_event_);
+ void *tep_record_print_selected_fields*(struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, struct tep_event pass:[*]_event_, int _select_mask_);
+
+Event fields finding:
+ struct tep_format_field pass:[*]*tep_find_common_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
+ struct tep_format_field pass:[*]*tep_find_field*(struct tep_event_ormat pass:[*]_event_, const char pass:[*]_name_);
+ struct tep_format_field pass:[*]*tep_find_any_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
+
+Functions resolver:
+ int *tep_set_function_resolver*(struct tep_handle pass:[*]_tep_, tep_func_resolver_t pass:[*]_func_, void pass:[*]_priv_);
+ void *tep_reset_function_resolver*(struct tep_handle pass:[*]_tep_);
+ const char pass:[*]*tep_find_function*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
+ unsigned long long *tep_find_function_address*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
+ int *tep_find_function_info*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_, const char pass:[**]_name_,
+ unsigned long long pass:[*]_start_, unsigned long pass:[*]_size_);
+
+Filter management:
+ struct tep_event_filter pass:[*]*tep_filter_alloc*(struct tep_handle pass:[*]_tep_);
+ enum tep_errno *tep_filter_add_filter_str*(struct tep_event_filter pass:[*]_filter_, const char pass:[*]_filter_str_);
+ enum tep_errno *tep_filter_match*(struct tep_event_filter pass:[*]_filter_, struct tep_record pass:[*]_record_);
+ int *tep_filter_strerror*(struct tep_event_filter pass:[*]_filter_, enum tep_errno _err_, char pass:[*]buf, size_t _buflen_);
+ int *tep_event_filtered*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
+ void *tep_filter_reset*(struct tep_event_filter pass:[*]_filter_);
+ void *tep_filter_free*(struct tep_event_filter pass:[*]_filter_);
+ char pass:[*]*tep_filter_make_string*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
+ int *tep_filter_remove_event*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
+ int *tep_filter_copy*(struct tep_event_filter pass:[*]_dest_, struct tep_event_filter pass:[*]_source_);
+ int *tep_filter_compare*(struct tep_event_filter pass:[*]_filter1_, struct tep_event_filter pass:[*]_filter2_);
+
+Parsing various data from the records:
+ int *tep_data_type*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+ int *tep_data_pid*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+ int *tep_data_preempt_count*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+ int *tep_data_flags*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
+
+Command and task related APIs:
+ const char pass:[*]*tep_data_comm_from_pid*(struct tep_handle pass:[*]_tep_, int _pid_);
+ struct cmdline pass:[*]*tep_data_pid_from_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, struct cmdline pass:[*]_next_);
+ int *tep_register_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
+ int *tep_override_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
+ bool *tep_is_pid_registered*(struct tep_handle pass:[*]_tep_, int _pid_);
+ int *tep_cmdline_pid*(struct tep_handle pass:[*]_tep_, struct cmdline pass:[*]_cmdline_);
+
+Endian related APIs:
+ int *tep_is_bigendian*(void);
+ unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_);
+ bool *tep_is_file_bigendian*(struct tep_handle pass:[*]_tep_);
+ void *tep_set_file_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
+ bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_);
+ void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
+
+Control library logs:
+ int *tep_set_loglevel*(enum tep_loglevel _level_);
+
+KVM plugin calllbacks: (Defined by the application and complied with -rdynamic)
+ const char pass:[*]*tep_plugin_kvm_get_func*(struct tep_event pass:[*]event,
+ struct tep_record pass:[*]record,
+ unsigned long long pass:[*]paddr);
+ void *tep_plugin_kvm_put_func*(const char pass:[*]func);
+
+Trace sequences:
+*#include <trace-seq.h>*
+ void *trace_seq_init*(struct trace_seq pass:[*]_s_);
+ void *trace_seq_reset*(struct trace_seq pass:[*]_s_);
+ void *trace_seq_destroy*(struct trace_seq pass:[*]_s_);
+ int *trace_seq_printf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, ...);
+ int *trace_seq_vprintf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, va_list _args_);
+ int *trace_seq_puts*(struct trace_seq pass:[*]_s_, const char pass:[*]_str_);
+ int *trace_seq_putc*(struct trace_seq pass:[*]_s_, unsigned char _c_);
+ void *trace_seq_terminate*(struct trace_seq pass:[*]_s_);
+ int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_);
+ int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_);
+
+kbuffer parsing:
+#include <kbuffer.h>
+ struct kbuffer pass:[*]*kbuffer_alloc*(enum kbuffer_long_size _size_, enum kbuffer_endian _endian_);
+ void *kbuffer_free*(struct kbuffer pass:[*]_kbuf_);
+ int *kbuffer_load_subbuffer*(struct kbuffer pass:[*]_kbuf_, void pass:[*]_subbuffer_);
+ int *kbuffer_subbuffer_size*(struct kbuffer pass:[*]_kbuf);
+ int *kbuffer_start_of_data*(struct kbuffer pass:[*]_kbuf_);
+ unsigned long long *kbuffer_timestamp*(struct kbuffer pass:[*]_kbuf_);
+ unsigned long long *kbuffer_subbuf_timestamp*(struct kbuffer pass:[*]_kbuf_, void pass:[*]_subbuf_);
+ void pass:[*]*kbuffer_read_event*(struct kbuffer pass:[*]_kbuf_, unsigned long long pass:[*]_ts_);
+ void pass:[*]*kbuffer_next_event*(struct kbuffer pass:[*]_kbuf_, unsigned long long pass:[*]_ts_);
+ void pass:[*]*kbuffer_read_at_offset*(struct kbuffer pass:[*]_kbuf_, int _offset_, unsigned long long pass:[*]_ts_);
+ int *kbuffer_missed_events*(struct kbuffer pass:[*]_kbuf_);
+ int *kbuffer_event_size*(struct kbuffer pass:[*]_kbuf_);
+ int *kbuffer_curr_size*(struct kbuffer pass:[*]_kbuf_);
+ int *kbuffer_curr_offset*(struct kbuffer pass:[*]_kbuf_);
+ int *kbuffer_curr_index*(struct kbuffer pass:[*]_kbuf_);
+--
+
+DESCRIPTION
+-----------
+The libtraceevent(3) library provides APIs to access kernel tracepoint events,
+located in the tracefs file system under the events directory.
+
+ENVIRONMENT
+-----------
+[verse]
+--
+TRACEEVENT_PLUGIN_DIR
+ Additional plugin directory. All shared object files, located in this directory will be loaded as traceevent plugins.
+--
+
+FILES
+-----
+[verse]
+--
+*event-parse.h*
+ Header file to include in order to have access to the library APIs.
+*trace-seq.h*
+ Header file to include in order to have access to trace sequences related APIs.
+ Trace sequences are used to allow a function to call several other functions
+ to create a string of data to use.
+*-ltraceevent*
+ Linker switch to add when building a program that uses the library.
+--
+
+SEE ALSO
+--------
+*trace-cmd*(1)
+
+AUTHOR
+------
+[verse]
+--
+*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to <linux-trace-devel@vger.kernel.org>
+
+LICENSE
+-------
+libtraceevent is Free Software licensed under the GNU LGPL 2.1
+
+RESOURCES
+---------
+https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
diff --git a/Documentation/manpage-1.72.xsl b/Documentation/manpage-1.72.xsl
new file mode 100644
index 0000000..b4d315c
--- /dev/null
+++ b/Documentation/manpage-1.72.xsl
@@ -0,0 +1,14 @@
+<!-- manpage-1.72.xsl:
+ special settings for manpages rendered from asciidoc+docbook
+ handles peculiarities in docbook-xsl 1.72.0 -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<xsl:import href="manpage-base.xsl"/>
+
+<!-- these are the special values for the roff control characters
+ needed for docbook-xsl 1.72.0 -->
+<xsl:param name="git.docbook.backslash">▓</xsl:param>
+<xsl:param name="git.docbook.dot" >⌂</xsl:param>
+
+</xsl:stylesheet>
diff --git a/Documentation/manpage-base.xsl b/Documentation/manpage-base.xsl
new file mode 100644
index 0000000..a264fa6
--- /dev/null
+++ b/Documentation/manpage-base.xsl
@@ -0,0 +1,35 @@
+<!-- manpage-base.xsl:
+ special formatting for manpages rendered from asciidoc+docbook -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<!-- these params silence some output from xmlto -->
+<xsl:param name="man.output.quietly" select="1"/>
+<xsl:param name="refentry.meta.get.quietly" select="1"/>
+
+<!-- convert asciidoc callouts to man page format;
+ git.docbook.backslash and git.docbook.dot params
+ must be supplied by another XSL file or other means -->
+<xsl:template match="co">
+ <xsl:value-of select="concat(
+ $git.docbook.backslash,'fB(',
+ substring-after(@id,'-'),')',
+ $git.docbook.backslash,'fR')"/>
+</xsl:template>
+<xsl:template match="calloutlist">
+ <xsl:value-of select="$git.docbook.dot"/>
+ <xsl:text>sp </xsl:text>
+ <xsl:apply-templates/>
+ <xsl:text> </xsl:text>
+</xsl:template>
+<xsl:template match="callout">
+ <xsl:value-of select="concat(
+ $git.docbook.backslash,'fB',
+ substring-after(@arearefs,'-'),
+ '. ',$git.docbook.backslash,'fR')"/>
+ <xsl:apply-templates/>
+ <xsl:value-of select="$git.docbook.dot"/>
+ <xsl:text>br </xsl:text>
+</xsl:template>
+
+</xsl:stylesheet>
diff --git a/Documentation/manpage-bold-literal.xsl b/Documentation/manpage-bold-literal.xsl
new file mode 100644
index 0000000..608eb5d
--- /dev/null
+++ b/Documentation/manpage-bold-literal.xsl
@@ -0,0 +1,17 @@
+<!-- manpage-bold-literal.xsl:
+ special formatting for manpages rendered from asciidoc+docbook -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<!-- render literal text as bold (instead of plain or monospace);
+ this makes literal text easier to distinguish in manpages
+ viewed on a tty -->
+<xsl:template match="literal">
+ <xsl:value-of select="$git.docbook.backslash"/>
+ <xsl:text>fB</xsl:text>
+ <xsl:apply-templates/>
+ <xsl:value-of select="$git.docbook.backslash"/>
+ <xsl:text>fR</xsl:text>
+</xsl:template>
+
+</xsl:stylesheet>
diff --git a/Documentation/manpage-normal.xsl b/Documentation/manpage-normal.xsl
new file mode 100644
index 0000000..a48f5b1
--- /dev/null
+++ b/Documentation/manpage-normal.xsl
@@ -0,0 +1,13 @@
+<!-- manpage-normal.xsl:
+ special settings for manpages rendered from asciidoc+docbook
+ handles anything we want to keep away from docbook-xsl 1.72.0 -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<xsl:import href="manpage-base.xsl"/>
+
+<!-- these are the normal values for the roff control characters -->
+<xsl:param name="git.docbook.backslash">\</xsl:param>
+<xsl:param name="git.docbook.dot" >.</xsl:param>
+
+</xsl:stylesheet>
diff --git a/Documentation/manpage-suppress-sp.xsl b/Documentation/manpage-suppress-sp.xsl
new file mode 100644
index 0000000..a63c763
--- /dev/null
+++ b/Documentation/manpage-suppress-sp.xsl
@@ -0,0 +1,21 @@
+<!-- manpage-suppress-sp.xsl:
+ special settings for manpages rendered from asciidoc+docbook
+ handles erroneous, inline .sp in manpage output of some
+ versions of docbook-xsl -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ version="1.0">
+
+<!-- attempt to work around spurious .sp at the tail of the line
+ that some versions of docbook stylesheets seem to add -->
+<xsl:template match="simpara">
+ <xsl:variable name="content">
+ <xsl:apply-templates/>
+ </xsl:variable>
+ <xsl:value-of select="normalize-space($content)"/>
+ <xsl:if test="not(ancestor::authorblurb) and
+ not(ancestor::personblurb)">
+ <xsl:text> </xsl:text>
+ </xsl:if>
+</xsl:template>
+
+</xsl:stylesheet>
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..915311d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,865 @@
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+ To use this license in source code, put one of the following SPDX
+ tag/value pairs into a comment according to the placement
+ guidelines in the licensing rules documentation.
+ For 'GNU General Public License (GPL) version 2 only' use:
+ SPDX-License-Identifier: GPL-2.0
+ or
+ SPDX-License-Identifier: GPL-2.0-only
+ For 'GNU General Public License (GPL) version 2 or any later version' use:
+ SPDX-License-Identifier: GPL-2.0+
+ or
+ SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
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diff --git a/LICENSES/GPL-2.0 b/LICENSES/GPL-2.0
new file mode 100644
index 0000000..ff0812f
--- /dev/null
+++ b/LICENSES/GPL-2.0
@@ -0,0 +1,359 @@
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diff --git a/LICENSES/LGPL-2.1 b/LICENSES/LGPL-2.1
new file mode 100644
index 0000000..27bb434
--- /dev/null
+++ b/LICENSES/LGPL-2.1
@@ -0,0 +1,503 @@
+Valid-License-Identifier: LGPL-2.1
+Valid-License-Identifier: LGPL-2.1+
+SPDX-URL: https://spdx.org/licenses/LGPL-2.1.html
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+ This section is intended to make thoroughly clear what is believed to
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+12. If the distribution and/or use of the Library is restricted in certain
+ countries either by patents or by copyrighted interfaces, the original
+ copyright holder who places the Library under this License may add an
+ explicit geographical distribution limitation excluding those
+ countries, so that distribution is permitted only in or among countries
+ not thus excluded. In such case, this License incorporates the
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+
+13. The Free Software Foundation may publish revised and/or new versions of
+ the Lesser General Public License from time to time. Such new versions
+ will be similar in spirit to the present version, but may differ in
+ detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the Library
+ specifies a version number of this License which applies to it and "any
+ later version", you have the option of following the terms and
+ conditions either of that version or of any later version published by
+ the Free Software Foundation. If the Library does not specify a license
+ version number, you may choose any version ever published by the Free
+ Software Foundation.
+
+14. If you wish to incorporate parts of the Library into other free
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+ guided by the two goals of preserving the free status of all
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+
+NO WARRANTY
+
+15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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+16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Libraries
+
+If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+To apply these terms, attach the following notices to the library. It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+one line to give the library's name and an idea of what it does.
+Copyright (C) year name of author
+
+This library is free software; you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at
+your option) any later version.
+
+This library is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Also add
+information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+Yoyodyne, Inc., hereby disclaims all copyright interest in
+the library `Frob' (a library for tweaking knobs) written
+by James Random Hacker.
+
+signature of Ty Coon, 1 April 1990
+Ty Coon, President of Vice
+That's all there is to it!
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..764071d
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,19 @@
+# This project was upgraded with external_updater.
+# Usage: tools/external_updater/updater.sh update libtraceevent
+# For more info, check https://cs.android.com/android/platform/superproject/+/master:tools/external_updater/README.md
+
+name: "libtraceevent"
+description: "libtraceevent is a library that provides APIs to access and configure kernel trace events through the tracefs filesystem."
+third_party {
+ url {
+ type: GIT
+ value: "https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git"
+ }
+ version: "libtraceevent-1.7.1"
+ license_type: RESTRICTED
+ last_upgrade_date {
+ year: 2023
+ month: 1
+ day: 18
+ }
+}
diff --git a/MODULE_LICENSE_GPL b/MODULE_LICENSE_GPL
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_GPL
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..20d90be
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,443 @@
+# SPDX-License-Identifier: GPL-2.0
+# libtraceevent version
+EP_VERSION = 1
+EP_PATCHLEVEL = 7
+EP_EXTRAVERSION = 1
+EVENT_PARSE_VERSION = $(EP_VERSION).$(EP_PATCHLEVEL).$(EP_EXTRAVERSION)
+
+MAKEFLAGS += --no-print-directory
+
+
+# Makefiles suck: This macro sets a default value of $(2) for the
+# variable named by $(1), unless the variable has been set by
+# environment or command line. This is necessary for CC and AR
+# because make sets default values, so the simpler ?= approach
+# won't work as expected.
+define allow-override
+ $(if $(or $(findstring environment,$(origin $(1))),\
+ $(findstring command line,$(origin $(1)))),,\
+ $(eval $(1) = $(2)))
+endef
+
+# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+$(call allow-override,NM,$(CROSS_COMPILE)nm)
+$(call allow-override,PKG_CONFIG,pkg-config)
+$(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
+$(call allow-override,LDCONFIG,ldconfig)
+
+EXT = -std=gnu99
+INSTALL = install
+
+# Use DESTDIR for installing into a different root directory.
+# This is useful for building a package. The program will be
+# installed in this directory as if it was the root directory.
+# Then the build tool can move it later.
+DESTDIR ?=
+DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
+
+LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
+ifeq ($(LP64), 1)
+ libdir_relative_temp = lib64
+else
+ libdir_relative_temp = lib
+endif
+
+libdir_relative ?= $(libdir_relative_temp)
+prefix ?= /usr/local
+libdir ?= $(prefix)/$(libdir_relative)
+man_dir ?= $(prefix)/share/man
+man_dir_SQ = '$(subst ','\'',$(man_dir))'
+pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) \
+ --variable pc_path pkg-config | tr ":" " "))
+includedir_relative = include/traceevent
+includedir = $(prefix)/$(includedir_relative)
+includedir_SQ = '$(subst ','\'',$(includedir))'
+
+export man_dir man_dir_SQ INSTALL
+export DESTDIR DESTDIR_SQ
+export EP_VERSION EVENT_PARSE_VERSION
+
+# copy a bit from Linux kbuild
+
+ifeq ("$(origin V)", "command line")
+ VERBOSE = $(V)
+endif
+ifndef VERBOSE
+ VERBOSE = 0
+endif
+
+SILENT := $(if $(findstring s,$(filter-out --%,$(MAKEFLAGS))),1)
+
+ifeq ("$(origin O)", "command line")
+
+ saved-output := $(O)
+ BUILD_OUTPUT := $(shell cd $(O) && /bin/pwd)
+ $(if $(BUILD_OUTPUT),, \
+ $(error output directory "$(saved-output)" does not exist))
+
+else
+ BUILD_OUTPUT = $(CURDIR)
+endif
+
+srctree := $(if $(BUILD_SRC),$(BUILD_SRC),$(CURDIR))
+objtree := $(BUILD_OUTPUT)
+src := $(srctree)
+obj := $(objtree)
+bdir := $(obj)/lib
+
+export prefix src obj bdir
+
+PKG_CONFIG_SOURCE_FILE = libtraceevent.pc
+PKG_CONFIG_FILE := $(addprefix $(obj)/,$(PKG_CONFIG_SOURCE_FILE))
+
+export Q SILENT VERBOSE EXT
+
+# Include the utils
+include scripts/utils.mk
+
+include $(src)/scripts/features.mk
+
+# Shell quotes
+libdir_SQ = $(subst ','\'',$(libdir))
+libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
+
+CONFIG_INCLUDES =
+CONFIG_LIBS =
+CONFIG_FLAGS =
+
+VERSION = $(EP_VERSION)
+PATCHLEVEL = $(EP_PATCHLEVEL)
+EXTRAVERSION = $(EP_EXTRAVERSION)
+
+OBJ = $@
+N =
+
+LIBTRACEEVENT_STATIC = $(bdir)/libtraceevent.a
+LIBTRACEEVENT_SHARED = $(bdir)/libtraceevent.so.$(EVENT_PARSE_VERSION)
+
+EP_HEADERS_DIR = $(src)/include/traceevent
+
+INCLUDES = -I. -I $(srctree)/include -I $(EP_HEADERS_DIR) $(CONFIG_INCLUDES)
+
+export LIBTRACEEVENT_STATIC LIBTRACEEVENT_SHARED EP_HEADERS_DIR
+
+# Set compile option CFLAGS
+ifdef EXTRA_CFLAGS
+ CFLAGS := $(EXTRA_CFLAGS)
+else
+ CFLAGS := -g -Wall
+endif
+
+LIBS ?= -ldl
+export LIBS
+
+set_plugin_dir := 1
+
+# Set plugin_dir to prefered global plugin location
+# If we install under $HOME directory we go under
+# $(HOME)/.local/lib/traceevent/plugins
+#
+# We dont set PLUGIN_DIR in case we install under $HOME
+# directory, because by default the code looks under:
+# $(HOME)/.local/lib/traceevent/plugins by default.
+#
+ifeq ($(plugin_dir),)
+ifeq ($(prefix),$(HOME))
+override plugin_dir = $(HOME)/.local/lib/traceevent/plugins
+set_plugin_dir := 0
+else
+override plugin_dir = $(libdir)/traceevent/plugins
+endif
+export plugin_dir
+endif
+
+ifeq ($(set_plugin_dir),1)
+PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)"
+PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
+export PLUGIN_DIR PLUGIN_DIR_SQ
+endif
+
+# Append required CFLAGS
+override CFLAGS += -fPIC
+override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
+override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
+
+# Make sure 32 bit stat() works on large file systems
+override CFLAGS += -D_FILE_OFFSET_BITS=64
+
+ifeq ($(VERBOSE),1)
+ Q =
+else
+ Q = @
+endif
+
+# Disable command line variables (CFLAGS) override from top
+# level Makefile (perf), otherwise build Makefile will get
+# the same command line setup.
+MAKEOVERRIDES=
+
+export srctree CC LD CFLAGS V
+build := -f $(srctree)/build/Makefile.build dir=. obj
+
+LIB_TARGET := libtraceevent.so libtraceevent.a
+
+CMD_TARGETS = $(LIB_TARGET) $(PKG_CONFIG_FILE)
+
+TARGETS = $(CMD_TARGETS)
+
+all: all_cmd plugins
+
+$(bdir):
+ $(Q)mkdir -p $(bdir)
+
+LIB_TARGET = libtraceevent.a libtraceevent.so
+LIB_INSTALL = libtraceevent.a libtraceevent.so*
+LIB_INSTALL := $(addprefix $(bdir)/,$(LIB_INSTALL))
+
+LIBTRACEEVENT_SHARED_SO = $(bdir)/libtraceevent.so
+LIBTRACEEVENT_SHARED_VERSION = $(bdir)/libtraceevent.so.$(EP_VERSION)
+
+export LIBTRACEEVENT_SHARED_SO LIBTRACEEVENT_SHARED_VERSION
+
+all_cmd: $(CMD_TARGETS)
+
+libtraceevent.a: $(bdir) $(LIBTRACEEVENT_STATIC)
+libtraceevent.so: $(bdir) $(LIBTRACEEVENT_SHARED)
+
+libs: libtraceevent.a libtraceevent.so
+
+$(LIBTRACEEVENT_STATIC): force
+ $(Q)$(call descend,$(src)/src,$@)
+
+$(LIBTRACEEVENT_SHARED): force
+ $(Q)$(call descend,$(src)/src,libtraceevent.so)
+
+$(bdir)/libtraceevent.so: $(bdir)/libtraceevent.so.$(EP_VERSION)
+ @ln -sf $(<F) $@
+
+define make_version.h
+ (echo '/* This file is automatically generated. Do not modify. */'; \
+ echo \#define VERSION_CODE $(shell \
+ expr $(VERSION) \* 256 + $(PATCHLEVEL)); \
+ echo '#define EXTRAVERSION ' $(EXTRAVERSION); \
+ echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"'; \
+ echo '#define FILE_VERSION '$(FILE_VERSION); \
+ ) > $1
+endef
+
+define update_version.h
+ ($(call make_version.h, $@.tmp); \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ echo ' UPDATE $@'; \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+VERSION_FILE = $(obj)/ep_version.h
+
+$(VERSION_FILE): force
+ $(Q)$(N)$(call update_version.h)
+
+define update_dir
+ (echo $1 > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ echo ' UPDATE $@'; \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+UTEST_DIR = utest
+
+test: force $(LIBTRACEEVENT_STATIC)
+ $(Q)$(call descend,$(UTEST_DIR),test)
+
+VIM_TAGS = $(obj)/tags
+EMACS_TAGS = $(obj)/TAGS
+
+$(VIM_TAGS): force
+ $(RM) $(VIM_TAGS)
+ find $(src) -name '*.[ch]' | (cd $(obj) && xargs ctags --extra=+f --c-kinds=+px \
+ --regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/')
+
+tags: $(VIM_TAGS)
+
+$(EMACS_TAGS): force
+ $(RM) $(EMACS_TAGS)
+ find $(src) -name '*.[ch]' | (cd $(obj) && xargs etags \
+ --regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/')
+
+TAGS: $(EMACS_TAGS)
+
+define build_prefix
+ (echo $1 > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ $(PRINT_GEN) \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+BUILD_PREFIX := $(obj)/build_prefix
+
+$(BUILD_PREFIX): force
+ $(Q)$(call build_prefix,$(prefix))
+
+define do_make_pkgconfig_file
+ cp -f ${PKG_CONFIG_SOURCE_FILE}.template ${PKG_CONFIG_FILE}; \
+ sed -i "s|INSTALL_PREFIX|${1}|g" ${PKG_CONFIG_FILE}; \
+ sed -i "s|LIB_VERSION|${EVENT_PARSE_VERSION}|g" ${PKG_CONFIG_FILE}; \
+ sed -i "s|LIB_DIR|${libdir_relative}|g" ${PKG_CONFIG_FILE}; \
+ sed -i "s|HEADER_DIR|$(includedir_relative)|g" ${PKG_CONFIG_FILE};
+endef
+
+$(PKG_CONFIG_FILE) : ${PKG_CONFIG_SOURCE_FILE}.template $(BUILD_PREFIX) $(VERSION_FILE)
+ $(Q)$(print_gen)$(call do_make_pkgconfig_file,$(prefix))
+
+define do_install_pkgconfig_file
+ if [ -n "${pkgconfig_dir}" ]; then \
+ $(call do_install,$(PKG_CONFIG_FILE),$(pkgconfig_dir),644); \
+ else \
+ (echo Failed to locate pkg-config directory) 1>&2; \
+ fi
+endef
+
+
+ifeq ("$(DESTDIR)", "")
+# If DESTDIR is not defined, then test if after installing the library
+# and running ldconfig, if the library is visible by ld.so.
+# If not, add the path to /etc/ld.so.conf.d/trace.conf and run ldconfig again.
+define install_ld_config
+ if $(LDCONFIG); then \
+ if ! grep -q "^$(libdir)$$" $(LD_SO_CONF_PATH)/* ; then \
+ $(CC) -o $(objtree)/test $(srctree)/test.c -I $(includedir_SQ) \
+ -L $(libdir_SQ) -ltraceevent &> /dev/null; \
+ if ! $(objtree)/test &> /dev/null; then \
+ $(call print_install, trace.conf, $(LD_SO_CONF_PATH)) \
+ echo $(libdir_SQ) >> $(LD_SO_CONF_PATH)/trace.conf; \
+ $(LDCONFIG); \
+ fi; \
+ $(RM) $(objtree)/test; \
+ fi; \
+ fi
+endef
+else
+# If installing to a location for another machine or package, do not bother
+# with running ldconfig.
+define install_ld_config
+endef
+endif # DESTDIR = ""
+
+install: install_libs install_plugins
+
+install_libs: libs install_headers install_pkgconfig
+ $(Q)$(call do_install,$(LIBTRACEEVENT_SHARED),$(libdir_SQ)); \
+ cp -fpR $(LIB_INSTALL) $(DESTDIR)$(libdir_SQ)
+ $(Q)$(call install_ld_config)
+
+install_pkgconfig: $(PKG_CONFIG_FILE)
+ $(Q)$(call do_install_pkgconfig_file,$(prefix))
+
+install_headers:
+ $(Q)$(call do_install,$(EP_HEADERS_DIR)/event-parse.h,$(includedir_SQ),644);
+ $(Q)$(call do_install,$(EP_HEADERS_DIR)/event-utils.h,$(includedir_SQ),644);
+ $(Q)$(call do_install,$(EP_HEADERS_DIR)/trace-seq.h,$(includedir_SQ),644);
+ $(Q)$(call do_install,$(EP_HEADERS_DIR)/kbuffer.h,$(includedir_SQ),644)
+
+install: install_libs
+
+clean: clean_plugins clean_src
+ $(Q)$(call do_clean,\
+ $(VERSION_FILE) $(obj)/tags $(obj)/TAGS $(PKG_CONFIG_FILE) \
+ $(LIBTRACEEVENT_STATIC) $(LIBTRACEEVENT_SHARED) \
+ $(LIBTRACEEVENT_SHARED_SO) $(LIBTRACEEVENT_SHARED_VERSION) \
+ $(BUILD_PREFIX))
+
+define build_uninstall_script
+ $(Q)mkdir $(BUILD_OUTPUT)/tmp_build
+ $(Q)$(MAKE) -C $(srctree) DESTDIR=$(BUILD_OUTPUT)/tmp_build/ O=$(BUILD_OUTPUT) $1 > /dev/null
+ $(Q)find $(BUILD_OUTPUT)/tmp_build ! -type d -printf "%P\n" > $(BUILD_OUTPUT)/build_$2
+ $(Q)$(RM) -rf $(BUILD_OUTPUT)/tmp_build
+endef
+
+build_uninstall: $(BUILD_PREFIX)
+ $(call build_uninstall_script,install,uninstall)
+
+$(BUILD_OUTPUT)/build_uninstall: build_uninstall
+
+define uninstall_file
+ if [ -f $(DESTDIR)/$1 -o -h $(DESTDIR)/$1 ]; then \
+ $(call PRINT_UNINST,$(DESTDIR)$1)$(RM) $(DESTDIR)/$1; \
+ fi;
+endef
+
+uninstall: $(BUILD_OUTPUT)/build_uninstall
+ @$(foreach file,$(shell cat $(BUILD_OUTPUT)/build_uninstall),$(call uninstall_file,$(file)))
+
+PHONY += doc
+doc: check_doc
+ $(Q)$(call descend,$(src)/Documentation,)
+
+PHONY += doc-clean
+doc-clean:
+ $(MAKE) -C $(src)/Documentation clean
+
+PHONY += doc-install
+doc-install:
+ $(Q)$(call descend,$(src)/Documentation,install)
+
+check_doc: force
+ $(Q)$(src)/check-manpages.sh $(src)/Documentation
+
+
+PHONY += doc-uninstall
+doc-uninstall:
+ $(MAKE) -C $(src)/Documentation uninstall
+
+PHONY += help
+help:
+ @echo 'Possible targets:'
+ @echo''
+ @echo ' all - default, compile the library and the'\
+ 'plugins'
+ @echo ' plugins - compile the plugins'
+ @echo ' install - install the library, the plugins,'\
+ 'the header and pkgconfig files'
+ @echo ' clean - clean the library and the plugins object files'
+ @echo ' doc - compile the documentation files - man'\
+ 'and html pages, in the Documentation directory'
+ @echo ' doc-clean - clean the documentation files'
+ @echo ' doc-install - install the man pages'
+ @echo ' doc-uninstall - uninstall the man pages'
+ @echo''
+
+PHONY += plugins
+plugins:
+ $(Q)$(call descend,plugins,)
+
+PHONY += install_plugins
+install_plugins: plugins
+ $(Q)$(call descend,plugins,install)
+
+samples: libtraceevent.a force
+ $(Q)$(call descend,$(src)/samples,all)
+
+PHONY += clean_plugins
+clean_plugins:
+ $(Q)$(call descend_clean,plugins)
+
+PHONY += clean_src
+clean_src:
+ $(Q)$(call descend_clean,src)
+
+force:
+
+# Declare the contents of the .PHONY variable as phony. We keep that
+# information in a variable so we can use it in if_changed and friends.
+.PHONY: $(PHONY)
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..7e72f72
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,2 @@
+kaleshsingh@google.com
+namhyung@google.com
diff --git a/README b/README
new file mode 100644
index 0000000..3bf05ad
--- /dev/null
+++ b/README
@@ -0,0 +1,52 @@
+
+The official repository is here:
+
+ https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
+
+
+To build:
+
+ make;
+ sudo make install;
+
+To build in a specific directory outside of the source directory:
+
+ make O=/path/to/build; sudo make O=/path/to/build
+
+ Note that the path needs to exist before building.
+
+To set the install path (the expected final location):
+
+ make prefix=/usr; sudo make O=/path/to/build
+
+To install in a directory not for the local system (for use to move
+to another machine):
+
+ make DESTDIR=/path/to/dest/ install
+
+ Note, if you have write permission to the DESTDIR, then there is
+ no reason to use sudo or switch to root.
+
+ Note, DESTDIR must end with '/', otherwise the files will be appended
+ to the path, which will most likely have unwanted results.
+
+Contributions:
+
+ For questions about the use of the library, please send email to:
+
+ linux-trace-users@vger.kernel.org
+
+ Subscribe: http://vger.kernel.org/vger-lists.html#linux-trace-users
+ Archives: https://lore.kernel.org/linux-trace-users/
+
+ For contributions to development, please send patches to:
+
+ linux-trace-devel@vger.kernel.org
+
+ Subscribe: http://vger.kernel.org/vger-lists.html#linux-trace-devel
+ Archives: https://lore.kernel.org/linux-trace-devel/
+
+ Note, this project follows the style of submitting patches as described
+ by the Linux kernel.
+
+ https://www.kernel.org/doc/html/v5.4/process/submitting-patches.html
diff --git a/check-manpages.sh b/check-manpages.sh
new file mode 100755
index 0000000..4e9850f
--- /dev/null
+++ b/check-manpages.sh
@@ -0,0 +1,78 @@
+#!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1
+# Copyright (C) 2022, Google Inc, Steven Rostedt <rostedt@goodmis.org>
+#
+# This checks if any function is listed in a man page that is not listed
+# in the main man page.
+
+if [ $# -lt 1 ]; then
+ echo "usage: check-manpages man-page-path"
+ exit 1
+fi
+
+cd $1
+
+MAIN=libtraceevent
+MAIN_FILE=${MAIN}.txt
+
+PROCESSED=""
+
+# Ignore man pages that do not contain functions
+IGNORE=""
+
+for man in ${MAIN}-*.txt; do
+
+ for a in `sed -ne '/^NAME/,/^SYNOP/{/^[a-z]/{s/, *$//;s/,/\n/g;s/ //g;s/-.*$/-/;/-/{s/-//p;q};p}}' $man`; do
+ if [ "${PROCESSED/:${a} /}" != "${PROCESSED}" ]; then
+ P="${PROCESSED/:${a} */}"
+ echo "Found ${a} in ${man} and in ${P/* /}"
+ fi
+ PROCESSED="${man}:${a} ${PROCESSED}"
+ if [ "${IGNORE/$man/}" != "${IGNORE}" ]; then
+ continue
+ fi
+ if ! grep -q '\*'${a}'\*' $MAIN_FILE; then
+ if [ "$last" == "" ]; then
+ echo
+ fi
+ if [ "$last" != "$man" ]; then
+ echo "Missing functions from $MAIN_FILE that are in $man"
+ last=$man
+ fi
+ echo " ${a}"
+ fi
+ done
+done
+
+DEPRECATED="*tep_print_field*"
+
+# Should not be used by applications, only internal use by trace-cmd
+IGNORE="*kbuffer_set_old_format* *kbuffer_raw_get* *kbuffer_ptr_delta* *kbuffer_translate_data*"
+
+HEADER=event-parse.h
+
+sed -ne 's/^[a-z].*[ \*]\([a-z_][a-z_]*\)(.*/\1/p' -e 's/^\([a-z_][a-z_]*\)(.*/\1/p' ../include/traceevent/{event-parse,trace-seq,kbuffer}.h | while read f; do
+ if ! grep -q '\*'${f}'\*' $MAIN_FILE; then
+ if [ "${DEPRECATED/\*$f\*/}" != "${DEPRECATED}" ]; then
+ continue;
+ fi
+ if [ "${IGNORE/\*$f\*/}" != "${IGNORE}" ]; then
+ continue;
+ fi
+ for head in event-parse.h trace-seq.h kbuffer.h; do
+ if grep -q $f ../include/traceevent/$head; then
+ if [ "$HEADER" != "$head" ]; then
+ last=""
+ HEADER=$head
+ break
+ fi
+ fi
+ done
+ if [ "$last" == "" ]; then
+ echo
+ echo "Missing functions from $MAIN_FILE that are in $HEADER"
+ last=$f
+ fi
+ echo " ${f}"
+ fi
+done
diff --git a/include/asm/bug.h b/include/asm/bug.h
new file mode 100644
index 0000000..de8f8fe
--- /dev/null
+++ b/include/asm/bug.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_ASM_BUG_H
+#define _TOOLS_ASM_BUG_H
+
+#include <linux/compiler.h>
+#include <stdio.h>
+
+#define __WARN_printf(arg...) do { fprintf(stderr, arg); fprintf(stderr, "\n");} while (0)
+
+#define WARN(condition, format...) ({ \
+ int __ret_warn_on = !!(condition); \
+ if (unlikely(__ret_warn_on)) \
+ __WARN_printf(format); \
+ unlikely(__ret_warn_on); \
+})
+
+#define WARN_ON(condition) ({ \
+ int __ret_warn_on = !!(condition); \
+ if (unlikely(__ret_warn_on)) \
+ __WARN_printf("assertion failed at %s:%d\n", \
+ __FILE__, __LINE__); \
+ unlikely(__ret_warn_on); \
+})
+
+#define WARN_ON_ONCE(condition) ({ \
+ static int __warned; \
+ int __ret_warn_once = !!(condition); \
+ \
+ if (unlikely(__ret_warn_once && !__warned)) { \
+ __warned = true; \
+ WARN_ON(1); \
+ } \
+ unlikely(__ret_warn_once); \
+})
+
+#define WARN_ONCE(condition, format...) ({ \
+ static int __warned; \
+ int __ret_warn_once = !!(condition); \
+ \
+ if (unlikely(__ret_warn_once)) \
+ if (WARN(!__warned, format)) \
+ __warned = 1; \
+ unlikely(__ret_warn_once); \
+})
+
+#endif /* _TOOLS_ASM_BUG_H */
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
new file mode 100644
index 0000000..b9d4322
--- /dev/null
+++ b/include/linux/compiler-gcc.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_LINUX_COMPILER_H_
+#error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
+#endif
+
+/*
+ * Common definitions for all gcc versions go here.
+ */
+#ifndef GCC_VERSION
+#define GCC_VERSION (__GNUC__ * 10000 \
+ + __GNUC_MINOR__ * 100 \
+ + __GNUC_PATCHLEVEL__)
+#endif
+
+#if GCC_VERSION >= 70000 && !defined(__CHECKER__)
+# define __fallthrough __attribute__ ((fallthrough))
+#endif
+
+#if GCC_VERSION >= 40300
+# define __compiletime_error(message) __attribute__((error(message)))
+#endif /* GCC_VERSION >= 40300 */
+
+/* &a[0] degrades to a pointer: a different type from an array */
+#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
+
+#ifndef __pure
+#define __pure __attribute__((pure))
+#endif
+#define noinline __attribute__((noinline))
+#ifdef __has_attribute
+#if __has_attribute(disable_tail_calls)
+#define __no_tail_call __attribute__((disable_tail_calls))
+#endif
+#endif
+#ifndef __no_tail_call
+#if GCC_VERSION > 40201
+#define __no_tail_call __attribute__((optimize("no-optimize-sibling-calls")))
+#else
+#define __no_tail_call
+#endif
+#endif
+#ifndef __packed
+#define __packed __attribute__((packed))
+#endif
+#ifndef __noreturn
+#define __noreturn __attribute__((noreturn))
+#endif
+#ifndef __aligned
+#define __aligned(x) __attribute__((aligned(x)))
+#endif
+#define __printf(a, b) __attribute__((format(printf, a, b)))
+#define __scanf(a, b) __attribute__((format(scanf, a, b)))
+
+#if GCC_VERSION >= 50100
+#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
+#endif
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
new file mode 100644
index 0000000..2b3f735
--- /dev/null
+++ b/include/linux/compiler.h
@@ -0,0 +1,206 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_LINUX_COMPILER_H_
+#define _TOOLS_LINUX_COMPILER_H_
+
+#ifdef __GNUC__
+#include <linux/compiler-gcc.h>
+#endif
+
+#ifndef __compiletime_error
+# define __compiletime_error(message)
+#endif
+
+#ifdef __OPTIMIZE__
+# define __compiletime_assert(condition, msg, prefix, suffix) \
+ do { \
+ extern void prefix ## suffix(void) __compiletime_error(msg); \
+ if (!(condition)) \
+ prefix ## suffix(); \
+ } while (0)
+#else
+# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)
+#endif
+
+#define _compiletime_assert(condition, msg, prefix, suffix) \
+ __compiletime_assert(condition, msg, prefix, suffix)
+
+/**
+ * compiletime_assert - break build and emit msg if condition is false
+ * @condition: a compile-time constant condition to check
+ * @msg: a message to emit if condition is false
+ *
+ * In tradition of POSIX assert, this macro will break the build if the
+ * supplied condition is *false*, emitting the supplied error message if the
+ * compiler has support to do so.
+ */
+#define compiletime_assert(condition, msg) \
+ _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
+
+/* Optimization barrier */
+/* The "volatile" is due to gcc bugs */
+#define barrier() __asm__ __volatile__("": : :"memory")
+
+#ifndef __always_inline
+# define __always_inline inline __attribute__((always_inline))
+#endif
+
+#ifndef noinline
+#define noinline
+#endif
+#ifndef __no_tail_call
+#define __no_tail_call
+#endif
+
+/* Are two types/vars the same type (ignoring qualifiers)? */
+#ifndef __same_type
+# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
+#endif
+
+#ifdef __ANDROID__
+/*
+ * FIXME: Big hammer to get rid of tons of:
+ * "warning: always_inline function might not be inlinable"
+ *
+ * At least on android-ndk-r12/platforms/android-24/arch-arm
+ */
+#undef __always_inline
+#define __always_inline inline
+#endif
+
+#define __user
+#define __rcu
+#define __read_mostly
+
+#ifndef __attribute_const__
+# define __attribute_const__
+#endif
+
+#ifndef __maybe_unused
+# define __maybe_unused __attribute__((unused))
+#endif
+
+#ifndef __used
+# define __used __attribute__((__unused__))
+#endif
+
+#ifndef __packed
+# define __packed __attribute__((__packed__))
+#endif
+
+#ifndef __force
+# define __force
+#endif
+
+#ifndef __weak
+# define __weak __attribute__((weak))
+#endif
+
+#ifndef likely
+# define likely(x) __builtin_expect(!!(x), 1)
+#endif
+
+#ifndef unlikely
+# define unlikely(x) __builtin_expect(!!(x), 0)
+#endif
+
+#ifndef __init
+# define __init
+#endif
+
+#ifndef noinline
+# define noinline
+#endif
+
+#include <linux/types.h>
+
+/*
+ * Following functions are taken from kernel sources and
+ * break aliasing rules in their original form.
+ *
+ * While kernel is compiled with -fno-strict-aliasing,
+ * perf uses -Wstrict-aliasing=3 which makes build fail
+ * under gcc 4.4.
+ *
+ * Using extra __may_alias__ type to allow aliasing
+ * in this case.
+ */
+typedef __u8 __attribute__((__may_alias__)) __u8_alias_t;
+typedef __u16 __attribute__((__may_alias__)) __u16_alias_t;
+typedef __u32 __attribute__((__may_alias__)) __u32_alias_t;
+typedef __u64 __attribute__((__may_alias__)) __u64_alias_t;
+
+static __always_inline void __read_once_size(const volatile void *p, void *res, int size)
+{
+ switch (size) {
+ case 1: *(__u8_alias_t *) res = *(volatile __u8_alias_t *) p; break;
+ case 2: *(__u16_alias_t *) res = *(volatile __u16_alias_t *) p; break;
+ case 4: *(__u32_alias_t *) res = *(volatile __u32_alias_t *) p; break;
+ case 8: *(__u64_alias_t *) res = *(volatile __u64_alias_t *) p; break;
+ default:
+ barrier();
+ __builtin_memcpy((void *)res, (const void *)p, size);
+ barrier();
+ }
+}
+
+static __always_inline void __write_once_size(volatile void *p, void *res, int size)
+{
+ switch (size) {
+ case 1: *(volatile __u8_alias_t *) p = *(__u8_alias_t *) res; break;
+ case 2: *(volatile __u16_alias_t *) p = *(__u16_alias_t *) res; break;
+ case 4: *(volatile __u32_alias_t *) p = *(__u32_alias_t *) res; break;
+ case 8: *(volatile __u64_alias_t *) p = *(__u64_alias_t *) res; break;
+ default:
+ barrier();
+ __builtin_memcpy((void *)p, (const void *)res, size);
+ barrier();
+ }
+}
+
+/*
+ * Prevent the compiler from merging or refetching reads or writes. The
+ * compiler is also forbidden from reordering successive instances of
+ * READ_ONCE and WRITE_ONCE, but only when the compiler is aware of some
+ * particular ordering. One way to make the compiler aware of ordering is to
+ * put the two invocations of READ_ONCE or WRITE_ONCE in different C
+ * statements.
+ *
+ * These two macros will also work on aggregate data types like structs or
+ * unions. If the size of the accessed data type exceeds the word size of
+ * the machine (e.g., 32 bits or 64 bits) READ_ONCE() and WRITE_ONCE() will
+ * fall back to memcpy and print a compile-time warning.
+ *
+ * Their two major use cases are: (1) Mediating communication between
+ * process-level code and irq/NMI handlers, all running on the same CPU,
+ * and (2) Ensuring that the compiler does not fold, spindle, or otherwise
+ * mutilate accesses that either do not require ordering or that interact
+ * with an explicit memory barrier or atomic instruction that provides the
+ * required ordering.
+ */
+
+#define READ_ONCE(x) \
+({ \
+ union { typeof(x) __val; char __c[1]; } __u = \
+ { .__c = { 0 } }; \
+ __read_once_size(&(x), __u.__c, sizeof(x)); \
+ __u.__val; \
+})
+
+#define WRITE_ONCE(x, val) \
+({ \
+ union { typeof(x) __val; char __c[1]; } __u = \
+ { .__val = (val) }; \
+ __write_once_size(&(x), __u.__c, sizeof(x)); \
+ __u.__val; \
+})
+
+
+#ifndef __fallthrough
+# define __fallthrough
+#endif
+
+/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
+#define ___PASTE(a, b) a##b
+#define __PASTE(a, b) ___PASTE(a, b)
+
+#endif /* _TOOLS_LINUX_COMPILER_H */
diff --git a/include/linux/time64.h b/include/linux/time64.h
new file mode 100644
index 0000000..55fa644
--- /dev/null
+++ b/include/linux/time64.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_LINUX_TIME64_H
+#define _TOOLS_LINUX_TIME64_H
+
+#define MSEC_PER_SEC 1000L
+#define USEC_PER_MSEC 1000L
+#define NSEC_PER_USEC 1000L
+#define NSEC_PER_MSEC 1000000L
+#define USEC_PER_SEC 1000000L
+#define NSEC_PER_SEC 1000000000L
+#define FSEC_PER_SEC 1000000000000000LL
+
+#endif /* _LINUX_TIME64_H */
diff --git a/include/traceevent/event-parse.h b/include/traceevent/event-parse.h
new file mode 100644
index 0000000..2171ad7
--- /dev/null
+++ b/include/traceevent/event-parse.h
@@ -0,0 +1,823 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#ifndef __TEP_PARSE_EVENTS_H
+#define __TEP_PARSE_EVENTS_H
+
+#include <stdbool.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <regex.h>
+#include <string.h>
+
+#include "trace-seq.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __maybe_unused
+#define __maybe_unused __attribute__((unused))
+#endif
+
+#ifndef DEBUG_RECORD
+#define DEBUG_RECORD 0
+#endif
+
+struct tep_record {
+ unsigned long long ts;
+ unsigned long long offset;
+ long long missed_events; /* buffer dropped events before */
+ int record_size; /* size of binary record */
+ int size; /* size of data */
+ void *data;
+ int cpu;
+ int ref_count;
+ int locked; /* Do not free, even if ref_count is zero */
+ void *priv;
+#if DEBUG_RECORD
+ struct tep_record *prev;
+ struct tep_record *next;
+ long alloc_addr;
+#endif
+};
+
+/* ----------------------- tep ----------------------- */
+
+struct tep_handle;
+struct tep_event;
+
+typedef int (*tep_event_handler_func)(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event,
+ void *context);
+
+typedef int (*tep_plugin_load_func)(struct tep_handle *tep);
+typedef int (*tep_plugin_unload_func)(struct tep_handle *tep);
+
+struct tep_plugin_option {
+ struct tep_plugin_option *next;
+ void *handle;
+ char *file;
+ char *name;
+ char *plugin_alias;
+ char *description;
+ const char *value;
+ void *priv;
+ int set;
+};
+
+/*
+ * Plugin hooks that can be called:
+ *
+ * TEP_PLUGIN_LOADER: (required)
+ * The function name to initialized the plugin.
+ *
+ * int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+ *
+ * TEP_PLUGIN_UNLOADER: (optional)
+ * The function called just before unloading
+ *
+ * int TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+ *
+ * TEP_PLUGIN_OPTIONS: (optional)
+ * Plugin options that can be set before loading
+ *
+ * struct tep_plugin_option TEP_PLUGIN_OPTIONS[] = {
+ * {
+ * .name = "option-name",
+ * .plugin_alias = "override-file-name", (optional)
+ * .description = "description of option to show users",
+ * },
+ * {
+ * .name = NULL,
+ * },
+ * };
+ *
+ * Array must end with .name = NULL;
+ *
+ *
+ * .plugin_alias is used to give a shorter name to access
+ * the vairable. Useful if a plugin handles more than one event.
+ *
+ * If .value is not set, then it is considered a boolean and only
+ * .set will be processed. If .value is defined, then it is considered
+ * a string option and .set will be ignored.
+ *
+ * TEP_PLUGIN_ALIAS: (optional)
+ * The name to use for finding options (uses filename if not defined)
+ */
+#define TEP_PLUGIN_LOADER tep_plugin_loader
+#define TEP_PLUGIN_UNLOADER tep_plugin_unloader
+#define TEP_PLUGIN_OPTIONS tep_plugin_options
+#define TEP_PLUGIN_ALIAS tep_plugin_alias
+#define _MAKE_STR(x) #x
+#define MAKE_STR(x) _MAKE_STR(x)
+#define TEP_PLUGIN_LOADER_NAME MAKE_STR(TEP_PLUGIN_LOADER)
+#define TEP_PLUGIN_UNLOADER_NAME MAKE_STR(TEP_PLUGIN_UNLOADER)
+#define TEP_PLUGIN_OPTIONS_NAME MAKE_STR(TEP_PLUGIN_OPTIONS)
+#define TEP_PLUGIN_ALIAS_NAME MAKE_STR(TEP_PLUGIN_ALIAS)
+
+enum tep_format_flags {
+ TEP_FIELD_IS_ARRAY = 1,
+ TEP_FIELD_IS_POINTER = 2,
+ TEP_FIELD_IS_SIGNED = 4,
+ TEP_FIELD_IS_STRING = 8,
+ TEP_FIELD_IS_DYNAMIC = 16,
+ TEP_FIELD_IS_LONG = 32,
+ TEP_FIELD_IS_FLAG = 64,
+ TEP_FIELD_IS_SYMBOLIC = 128,
+ TEP_FIELD_IS_RELATIVE = 256,
+};
+
+struct tep_format_field {
+ struct tep_format_field *next;
+ struct tep_event *event;
+ char *type;
+ char *name;
+ char *alias;
+ int offset;
+ int size;
+ unsigned int arraylen;
+ unsigned int elementsize;
+ unsigned long flags;
+};
+
+struct tep_format {
+ int nr_common;
+ int nr_fields;
+ struct tep_format_field *common_fields;
+ struct tep_format_field *fields;
+};
+
+struct tep_print_arg_atom {
+ char *atom;
+};
+
+struct tep_print_arg_string {
+ char *string;
+ int offset; // for backward compatibility
+ struct tep_format_field *field;
+};
+
+struct tep_print_arg_bitmask {
+ char *bitmask;
+ int offset; // for backward compatibility
+ struct tep_format_field *field;
+};
+
+struct tep_print_arg_field {
+ char *name;
+ struct tep_format_field *field;
+};
+
+struct tep_print_flag_sym {
+ struct tep_print_flag_sym *next;
+ char *value;
+ char *str;
+};
+
+struct tep_print_arg_typecast {
+ char *type;
+ struct tep_print_arg *item;
+};
+
+struct tep_print_arg_flags {
+ struct tep_print_arg *field;
+ char *delim;
+ struct tep_print_flag_sym *flags;
+};
+
+struct tep_print_arg_symbol {
+ struct tep_print_arg *field;
+ struct tep_print_flag_sym *symbols;
+};
+
+struct tep_print_arg_hex {
+ struct tep_print_arg *field;
+ struct tep_print_arg *size;
+};
+
+struct tep_print_arg_int_array {
+ struct tep_print_arg *field;
+ struct tep_print_arg *count;
+ struct tep_print_arg *el_size;
+};
+
+struct tep_print_arg_dynarray {
+ struct tep_format_field *field;
+ struct tep_print_arg *index;
+};
+
+struct tep_print_arg;
+
+struct tep_print_arg_op {
+ char *op;
+ int prio;
+ struct tep_print_arg *left;
+ struct tep_print_arg *right;
+};
+
+struct tep_function_handler;
+
+struct tep_print_arg_func {
+ struct tep_function_handler *func;
+ struct tep_print_arg *args;
+};
+
+enum tep_print_arg_type {
+ TEP_PRINT_NULL,
+ TEP_PRINT_ATOM,
+ TEP_PRINT_FIELD,
+ TEP_PRINT_FLAGS,
+ TEP_PRINT_SYMBOL,
+ TEP_PRINT_HEX,
+ TEP_PRINT_INT_ARRAY,
+ TEP_PRINT_TYPE,
+ TEP_PRINT_STRING,
+ TEP_PRINT_BSTRING,
+ TEP_PRINT_DYNAMIC_ARRAY,
+ TEP_PRINT_OP,
+ TEP_PRINT_FUNC,
+ TEP_PRINT_BITMASK,
+ TEP_PRINT_DYNAMIC_ARRAY_LEN,
+ TEP_PRINT_HEX_STR,
+ TEP_PRINT_CPUMASK,
+};
+
+struct tep_print_arg {
+ struct tep_print_arg *next;
+ enum tep_print_arg_type type;
+ union {
+ struct tep_print_arg_atom atom;
+ struct tep_print_arg_field field;
+ struct tep_print_arg_typecast typecast;
+ struct tep_print_arg_flags flags;
+ struct tep_print_arg_symbol symbol;
+ struct tep_print_arg_hex hex;
+ struct tep_print_arg_int_array int_array;
+ struct tep_print_arg_func func;
+ struct tep_print_arg_string string;
+ struct tep_print_arg_bitmask bitmask;
+ struct tep_print_arg_op op;
+ struct tep_print_arg_dynarray dynarray;
+ };
+};
+
+struct tep_print_parse;
+
+struct tep_print_fmt {
+ char *format;
+ struct tep_print_arg *args;
+ struct tep_print_parse *print_cache;
+};
+
+struct tep_event {
+ struct tep_handle *tep;
+ char *name;
+ int id;
+ int flags;
+ struct tep_format format;
+ struct tep_print_fmt print_fmt;
+ char *system;
+ tep_event_handler_func handler;
+ void *context;
+};
+
+enum {
+ TEP_EVENT_FL_ISFTRACE = 0x01,
+ TEP_EVENT_FL_ISPRINT = 0x02,
+ TEP_EVENT_FL_ISBPRINT = 0x04,
+ TEP_EVENT_FL_ISFUNCENT = 0x10,
+ TEP_EVENT_FL_ISFUNCRET = 0x20,
+ TEP_EVENT_FL_NOHANDLE = 0x40,
+ TEP_EVENT_FL_PRINTRAW = 0x80,
+
+ TEP_EVENT_FL_FAILED = 0x80000000
+};
+
+enum tep_event_sort_type {
+ TEP_EVENT_SORT_ID,
+ TEP_EVENT_SORT_NAME,
+ TEP_EVENT_SORT_SYSTEM,
+};
+
+enum tep_event_type {
+ TEP_EVENT_ERROR,
+ TEP_EVENT_NONE,
+ TEP_EVENT_SPACE,
+ TEP_EVENT_NEWLINE,
+ TEP_EVENT_OP,
+ TEP_EVENT_DELIM,
+ TEP_EVENT_ITEM,
+ TEP_EVENT_DQUOTE,
+ TEP_EVENT_SQUOTE,
+};
+
+typedef unsigned long long (*tep_func_handler)(struct trace_seq *s,
+ unsigned long long *args);
+
+enum tep_func_arg_type {
+ TEP_FUNC_ARG_VOID,
+ TEP_FUNC_ARG_INT,
+ TEP_FUNC_ARG_LONG,
+ TEP_FUNC_ARG_STRING,
+ TEP_FUNC_ARG_PTR,
+ TEP_FUNC_ARG_MAX_TYPES
+};
+
+enum tep_flag {
+ TEP_NSEC_OUTPUT = 1, /* output in NSECS */
+ TEP_DISABLE_SYS_PLUGINS = 1 << 1,
+ TEP_DISABLE_PLUGINS = 1 << 2,
+};
+
+#define TEP_ERRORS \
+ _PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
+ _PE(PARSE_EVENT_FAILED, "failed to parse event"), \
+ _PE(READ_ID_FAILED, "failed to read event id"), \
+ _PE(READ_FORMAT_FAILED, "failed to read event format"), \
+ _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
+ _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
+ _PE(INVALID_ARG_TYPE, "invalid argument type"), \
+ _PE(INVALID_EXP_TYPE, "invalid expression type"), \
+ _PE(INVALID_OP_TYPE, "invalid operator type"), \
+ _PE(INVALID_EVENT_NAME, "invalid event name"), \
+ _PE(EVENT_NOT_FOUND, "no event found"), \
+ _PE(SYNTAX_ERROR, "syntax error"), \
+ _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
+ _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
+ _PE(INVALID_REGEX, "regex did not compute"), \
+ _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
+ _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
+ _PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
+ _PE(REPARENT_FAILED, "failed to reparent filter OP"), \
+ _PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
+ _PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
+ _PE(ILLEGAL_TOKEN, "illegal token"), \
+ _PE(INVALID_PAREN, "open parenthesis cannot come here"), \
+ _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
+ _PE(UNKNOWN_TOKEN, "unknown token"), \
+ _PE(FILTER_NOT_FOUND, "no filter found"), \
+ _PE(NOT_A_NUMBER, "must have number field"), \
+ _PE(NO_FILTER, "no filters exists"), \
+ _PE(FILTER_MISS, "record does not match to filter")
+
+#undef _PE
+#define _PE(__code, __str) TEP_ERRNO__ ## __code
+enum tep_errno {
+ TEP_ERRNO__SUCCESS = 0,
+ TEP_ERRNO__FILTER_MATCH = TEP_ERRNO__SUCCESS,
+
+ /*
+ * Choose an arbitrary negative big number not to clash with standard
+ * errno since SUS requires the errno has distinct positive values.
+ * See 'Issue 6' in the link below.
+ *
+ * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
+ */
+ __TEP_ERRNO__START = -100000,
+
+ TEP_ERRORS,
+
+ __TEP_ERRNO__END,
+};
+#undef _PE
+
+struct tep_plugin_list;
+
+#define INVALID_PLUGIN_LIST_OPTION ((char **)((unsigned long)-1))
+
+enum tep_plugin_load_priority {
+ TEP_PLUGIN_FIRST,
+ TEP_PLUGIN_LAST,
+};
+
+int tep_add_plugin_path(struct tep_handle *tep, char *path,
+ enum tep_plugin_load_priority prio);
+struct tep_plugin_list *tep_load_plugins(struct tep_handle *tep);
+void tep_unload_plugins(struct tep_plugin_list *plugin_list,
+ struct tep_handle *tep);
+void tep_load_plugins_hook(struct tep_handle *tep, const char *suffix,
+ void (*load_plugin)(struct tep_handle *tep,
+ const char *path,
+ const char *name,
+ void *data),
+ void *data);
+char **tep_plugin_list_options(void);
+void tep_plugin_free_options_list(char **list);
+int tep_plugin_add_options(const char *name,
+ struct tep_plugin_option *options);
+int tep_plugin_add_option(const char *name, const char *val);
+void tep_plugin_remove_options(struct tep_plugin_option *options);
+void tep_plugin_print_options(struct trace_seq *s);
+void tep_print_plugins(struct trace_seq *s,
+ const char *prefix, const char *suffix,
+ const struct tep_plugin_list *list);
+
+/* tep_handle */
+typedef char *(tep_func_resolver_t)(void *priv,
+ unsigned long long *addrp, char **modp);
+void tep_set_flag(struct tep_handle *tep, int flag);
+void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag);
+bool tep_test_flag(struct tep_handle *tep, enum tep_flag flags);
+
+static inline int tep_is_bigendian(void)
+{
+ unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
+ unsigned int val;
+
+ memcpy(&val, str, 4);
+ return val == 0x01020304;
+}
+
+/* taken from kernel/trace/trace.h */
+enum trace_flag_type {
+ TRACE_FLAG_IRQS_OFF = 0x01,
+ TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
+ TRACE_FLAG_NEED_RESCHED = 0x04,
+ TRACE_FLAG_HARDIRQ = 0x08,
+ TRACE_FLAG_SOFTIRQ = 0x10,
+};
+
+int tep_set_function_resolver(struct tep_handle *tep,
+ tep_func_resolver_t *func, void *priv);
+void tep_reset_function_resolver(struct tep_handle *tep);
+int tep_register_comm(struct tep_handle *tep, const char *comm, int pid);
+int tep_override_comm(struct tep_handle *tep, const char *comm, int pid);
+int tep_parse_saved_cmdlines(struct tep_handle *tep, const char *buf);
+int tep_parse_kallsyms(struct tep_handle *tep, const char *kallsyms);
+int tep_register_function(struct tep_handle *tep, char *name,
+ unsigned long long addr, char *mod);
+int tep_parse_printk_formats(struct tep_handle *tep, const char *buf);
+int tep_register_print_string(struct tep_handle *tep, const char *fmt,
+ unsigned long long addr);
+bool tep_is_pid_registered(struct tep_handle *tep, int pid);
+
+struct tep_event *tep_get_event(struct tep_handle *tep, int index);
+
+#define TEP_PRINT_INFO "INFO"
+#define TEP_PRINT_INFO_RAW "INFO_RAW"
+#define TEP_PRINT_COMM "COMM"
+#define TEP_PRINT_LATENCY "LATENCY"
+#define TEP_PRINT_NAME "NAME"
+#define TEP_PRINT_PID 1U
+#define TEP_PRINT_TIME 2U
+#define TEP_PRINT_CPU 3U
+
+void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
+ struct tep_record *record, const char *fmt, ...)
+ __attribute__ ((format (printf, 4, 5)));
+
+int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size,
+ int long_size);
+
+enum tep_errno tep_parse_event(struct tep_handle *tep, const char *buf,
+ unsigned long size, const char *sys);
+enum tep_errno tep_parse_format(struct tep_handle *tep,
+ struct tep_event **eventp,
+ const char *buf,
+ unsigned long size, const char *sys);
+
+void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ int *len, int err);
+
+int tep_get_field_val(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err);
+int tep_get_common_field_val(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err);
+int tep_get_any_field_val(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err);
+
+int tep_print_num_field(struct trace_seq *s, const char *fmt,
+ struct tep_event *event, const char *name,
+ struct tep_record *record, int err);
+
+int tep_print_func_field(struct trace_seq *s, const char *fmt,
+ struct tep_event *event, const char *name,
+ struct tep_record *record, int err);
+
+enum tep_reg_handler {
+ TEP_REGISTER_SUCCESS = 0,
+ TEP_REGISTER_SUCCESS_OVERWRITE,
+};
+
+int tep_register_event_handler(struct tep_handle *tep, int id,
+ const char *sys_name, const char *event_name,
+ tep_event_handler_func func, void *context);
+int tep_unregister_event_handler(struct tep_handle *tep, int id,
+ const char *sys_name, const char *event_name,
+ tep_event_handler_func func, void *context);
+int tep_register_print_function(struct tep_handle *tep,
+ tep_func_handler func,
+ enum tep_func_arg_type ret_type,
+ char *name, ...);
+int tep_unregister_print_function(struct tep_handle *tep,
+ tep_func_handler func, char *name);
+
+struct tep_format_field *tep_find_common_field(struct tep_event *event, const char *name);
+struct tep_format_field *tep_find_field(struct tep_event *event, const char *name);
+struct tep_format_field *tep_find_any_field(struct tep_event *event, const char *name);
+
+const char *tep_find_function(struct tep_handle *tep, unsigned long long addr);
+unsigned long long
+tep_find_function_address(struct tep_handle *tep, unsigned long long addr);
+int tep_find_function_info(struct tep_handle *tep, unsigned long long addr,
+ const char **name, unsigned long long *start,
+ unsigned long *size);
+unsigned long long tep_read_number(struct tep_handle *tep, const void *ptr, int size);
+int tep_read_number_field(struct tep_format_field *field, const void *data,
+ unsigned long long *value);
+
+struct tep_event *tep_get_first_event(struct tep_handle *tep);
+int tep_get_events_count(struct tep_handle *tep);
+struct tep_event *tep_find_event(struct tep_handle *tep, int id);
+
+struct tep_event *
+tep_find_event_by_name(struct tep_handle *tep, const char *sys, const char *name);
+struct tep_event *
+tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record);
+
+int tep_data_type(struct tep_handle *tep, struct tep_record *rec);
+int tep_data_pid(struct tep_handle *tep, struct tep_record *rec);
+int tep_data_preempt_count(struct tep_handle *tep, struct tep_record *rec);
+int tep_data_flags(struct tep_handle *tep, struct tep_record *rec);
+const char *tep_data_comm_from_pid(struct tep_handle *tep, int pid);
+struct tep_cmdline;
+struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *tep, const char *comm,
+ struct tep_cmdline *next);
+int tep_cmdline_pid(struct tep_handle *tep, struct tep_cmdline *cmdline);
+
+void tep_print_field_content(struct trace_seq *s, void *data, int size,
+ struct tep_format_field *field);
+void tep_record_print_fields(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event);
+void tep_record_print_selected_fields(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event,
+ unsigned long long select_mask);
+void tep_print_fields(struct trace_seq *s, void *data,
+ int size __maybe_unused, struct tep_event *event);
+int tep_strerror(struct tep_handle *tep, enum tep_errno errnum,
+ char *buf, size_t buflen);
+
+struct tep_event **tep_list_events(struct tep_handle *tep, enum tep_event_sort_type);
+struct tep_event **tep_list_events_copy(struct tep_handle *tep,
+ enum tep_event_sort_type);
+struct tep_format_field **tep_event_common_fields(struct tep_event *event);
+struct tep_format_field **tep_event_fields(struct tep_event *event);
+
+int tep_get_function_count(struct tep_handle *tep);
+
+enum tep_endian {
+ TEP_LITTLE_ENDIAN = 0,
+ TEP_BIG_ENDIAN
+};
+int tep_get_cpus(struct tep_handle *tep);
+void tep_set_cpus(struct tep_handle *tep, int cpus);
+int tep_get_long_size(struct tep_handle *tep);
+void tep_set_long_size(struct tep_handle *tep, int long_size);
+int tep_get_page_size(struct tep_handle *tep);
+int tep_get_sub_buffer_size(struct tep_handle *tep);
+void tep_set_page_size(struct tep_handle *tep, int _page_size);
+bool tep_is_file_bigendian(struct tep_handle *tep);
+void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian);
+bool tep_is_local_bigendian(struct tep_handle *tep);
+void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian);
+int tep_get_header_page_size(struct tep_handle *tep);
+int tep_get_header_timestamp_size(struct tep_handle *tep);
+bool tep_is_old_format(struct tep_handle *tep);
+void tep_set_test_filters(struct tep_handle *tep, int test_filters);
+
+struct tep_handle *tep_alloc(void);
+void tep_free(struct tep_handle *tep);
+void tep_ref(struct tep_handle *tep);
+void tep_unref(struct tep_handle *tep);
+int tep_get_ref(struct tep_handle *tep);
+
+struct kbuffer *tep_kbuffer(struct tep_handle *tep);
+
+/* for debugging */
+void tep_print_funcs(struct tep_handle *tep);
+void tep_print_printk(struct tep_handle *tep);
+
+/* ----------------------- filtering ----------------------- */
+
+enum tep_filter_boolean_type {
+ TEP_FILTER_FALSE,
+ TEP_FILTER_TRUE,
+};
+
+enum tep_filter_op_type {
+ TEP_FILTER_OP_AND = 1,
+ TEP_FILTER_OP_OR,
+ TEP_FILTER_OP_NOT,
+};
+
+enum tep_filter_cmp_type {
+ TEP_FILTER_CMP_NONE,
+ TEP_FILTER_CMP_EQ,
+ TEP_FILTER_CMP_NE,
+ TEP_FILTER_CMP_GT,
+ TEP_FILTER_CMP_LT,
+ TEP_FILTER_CMP_GE,
+ TEP_FILTER_CMP_LE,
+ TEP_FILTER_CMP_MATCH,
+ TEP_FILTER_CMP_NOT_MATCH,
+ TEP_FILTER_CMP_REGEX,
+ TEP_FILTER_CMP_NOT_REGEX,
+};
+
+enum tep_filter_exp_type {
+ TEP_FILTER_EXP_NONE,
+ TEP_FILTER_EXP_ADD,
+ TEP_FILTER_EXP_SUB,
+ TEP_FILTER_EXP_MUL,
+ TEP_FILTER_EXP_DIV,
+ TEP_FILTER_EXP_MOD,
+ TEP_FILTER_EXP_RSHIFT,
+ TEP_FILTER_EXP_LSHIFT,
+ TEP_FILTER_EXP_AND,
+ TEP_FILTER_EXP_OR,
+ TEP_FILTER_EXP_XOR,
+ TEP_FILTER_EXP_NOT,
+};
+
+enum tep_filter_arg_type {
+ TEP_FILTER_ARG_NONE,
+ TEP_FILTER_ARG_BOOLEAN,
+ TEP_FILTER_ARG_VALUE,
+ TEP_FILTER_ARG_FIELD,
+ TEP_FILTER_ARG_EXP,
+ TEP_FILTER_ARG_OP,
+ TEP_FILTER_ARG_NUM,
+ TEP_FILTER_ARG_STR,
+};
+
+enum tep_filter_value_type {
+ TEP_FILTER_NUMBER,
+ TEP_FILTER_STRING,
+ TEP_FILTER_CHAR
+};
+
+struct tep_filter_arg;
+
+struct tep_filter_arg_boolean {
+ enum tep_filter_boolean_type value;
+};
+
+struct tep_filter_arg_field {
+ struct tep_format_field *field;
+};
+
+struct tep_filter_arg_value {
+ enum tep_filter_value_type type;
+ union {
+ char *str;
+ unsigned long long val;
+ };
+};
+
+struct tep_filter_arg_op {
+ enum tep_filter_op_type type;
+ struct tep_filter_arg *left;
+ struct tep_filter_arg *right;
+};
+
+struct tep_filter_arg_exp {
+ enum tep_filter_exp_type type;
+ struct tep_filter_arg *left;
+ struct tep_filter_arg *right;
+};
+
+struct tep_filter_arg_num {
+ enum tep_filter_cmp_type type;
+ struct tep_filter_arg *left;
+ struct tep_filter_arg *right;
+};
+
+struct tep_filter_arg_str {
+ enum tep_filter_cmp_type type;
+ struct tep_format_field *field;
+ char *val;
+ char *buffer;
+ regex_t reg;
+};
+
+struct tep_filter_arg {
+ enum tep_filter_arg_type type;
+ union {
+ struct tep_filter_arg_boolean boolean;
+ struct tep_filter_arg_field field;
+ struct tep_filter_arg_value value;
+ struct tep_filter_arg_op op;
+ struct tep_filter_arg_exp exp;
+ struct tep_filter_arg_num num;
+ struct tep_filter_arg_str str;
+ };
+};
+
+struct tep_filter_type {
+ int event_id;
+ struct tep_event *event;
+ struct tep_filter_arg *filter;
+};
+
+#define TEP_FILTER_ERROR_BUFSZ 1024
+
+struct tep_event_filter {
+ struct tep_handle *tep;
+ int filters;
+ struct tep_filter_type *event_filters;
+ char error_buffer[TEP_FILTER_ERROR_BUFSZ];
+};
+
+struct tep_event_filter *tep_filter_alloc(struct tep_handle *tep);
+
+/* for backward compatibility */
+#define FILTER_NONE TEP_ERRNO__NO_FILTER
+#define FILTER_NOEXIST TEP_ERRNO__FILTER_NOT_FOUND
+#define FILTER_MISS TEP_ERRNO__FILTER_MISS
+#define FILTER_MATCH TEP_ERRNO__FILTER_MATCH
+
+enum tep_errno tep_filter_add_filter_str(struct tep_event_filter *filter,
+ const char *filter_str);
+
+enum tep_errno tep_filter_match(struct tep_event_filter *filter,
+ struct tep_record *record);
+
+int tep_filter_strerror(struct tep_event_filter *filter, enum tep_errno err,
+ char *buf, size_t buflen);
+
+int tep_event_filtered(struct tep_event_filter *filter,
+ int event_id);
+
+void tep_filter_reset(struct tep_event_filter *filter);
+
+void tep_filter_free(struct tep_event_filter *filter);
+
+char *tep_filter_make_string(struct tep_event_filter *filter, int event_id);
+
+int tep_filter_remove_event(struct tep_event_filter *filter,
+ int event_id);
+
+int tep_filter_copy(struct tep_event_filter *dest, struct tep_event_filter *source);
+
+int tep_filter_compare(struct tep_event_filter *filter1, struct tep_event_filter *filter2);
+
+/* Control library logs */
+enum tep_loglevel {
+ TEP_LOG_NONE = 0,
+ TEP_LOG_CRITICAL,
+ TEP_LOG_ERROR,
+ TEP_LOG_WARNING,
+ TEP_LOG_INFO,
+ TEP_LOG_DEBUG,
+ TEP_LOG_ALL
+};
+void tep_set_loglevel(enum tep_loglevel level);
+
+/*
+ * Part of the KVM plugin. Will pass the current @event and @record
+ * as well as a pointer to the address to a guest kernel function.
+ * This is currently a weak function defined in the KVM plugin and
+ * should never be called. But a tool can override it, and this will
+ * be called when the kvm plugin has an address it needs the function
+ * name of.
+ *
+ * This function should return the function name for the given address
+ * and optionally, it can update @paddr to include the start of the function
+ * such that the kvm plugin can include an offset.
+ *
+ * For an application to be able to override the weak version in the
+ * plugin, it must be compiled with the gcc -rdynamic option that will
+ * allow the dynamic linker to use the application's function to
+ * override this callback.
+ */
+const char *tep_plugin_kvm_get_func(struct tep_event *event,
+ struct tep_record *record,
+ unsigned long long *paddr);
+
+/*
+ * tep_plugin_kvm_put_func() is another weak function that can be used
+ * to call back into the application if the function name returned by
+ * tep_plugin_kvm_get_func() needs to be freed.
+ */
+void tep_plugin_kvm_put_func(const char *func);
+
+/* DEPRECATED */
+void tep_print_field(struct trace_seq *s, void *data,
+ struct tep_format_field *field);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _PARSE_EVENTS_H */
diff --git a/include/traceevent/event-utils.h b/include/traceevent/event-utils.h
new file mode 100644
index 0000000..44f7968
--- /dev/null
+++ b/include/traceevent/event-utils.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#ifndef __TEP_EVENT_UTIL_H
+#define __TEP_EVENT_UTIL_H
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdbool.h>
+
+#include "event-parse.h"
+
+void tep_warning(const char *fmt, ...);
+void tep_info(const char *fmt, ...);
+
+/* Can be overridden */
+int tep_vprint(const char *name, enum tep_loglevel level,
+ bool print_err, const char *fmt, va_list ap);
+
+/* The actual call of tep_vprint() for overrides to use */
+int __tep_vprint(const char *name, enum tep_loglevel level,
+ bool print_err, const char *fmt, va_list ap);
+
+
+#define __deprecated(msg) __attribute__((deprecated("msg")))
+
+/* For backward compatibilty, do not use */
+int tep_vwarning(const char *name, const char *fmt, va_list ap) __deprecated(Use tep_vprint instead);
+void pr_stat(const char *fmt, ...) __deprecated(Use tep_info instead);
+void vpr_stat(const char *fmt, va_list ap) __deprecated(Use tep_vprint instead);
+void __pr_stat(const char *fmt, ...) __deprecated(Use tep_info instead);;
+void __vpr_stat(const char *fmt, va_list ap) __deprecated(Use tep_vprint instead);;
+
+#define min(x, y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+static inline char *strim(char *string)
+{
+ char *ret;
+
+ if (!string)
+ return NULL;
+ while (*string) {
+ if (!isspace(*string))
+ break;
+ string++;
+ }
+ ret = string;
+
+ string = ret + strlen(ret) - 1;
+ while (string > ret) {
+ if (!isspace(*string))
+ break;
+ string--;
+ }
+ string[1] = 0;
+
+ return ret;
+}
+
+static inline int has_text(const char *text)
+{
+ if (!text)
+ return 0;
+
+ while (*text) {
+ if (!isspace(*text))
+ return 1;
+ text++;
+ }
+
+ return 0;
+}
+
+#endif
diff --git a/include/traceevent/kbuffer.h b/include/traceevent/kbuffer.h
new file mode 100644
index 0000000..ca638bc
--- /dev/null
+++ b/include/traceevent/kbuffer.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ * Copyright (C) 2012 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#ifndef _KBUFFER_H
+#define _KBUFFER_H
+
+#ifndef TS_SHIFT
+#define TS_SHIFT 27
+#endif
+
+enum kbuffer_endian {
+ KBUFFER_ENDIAN_BIG,
+ KBUFFER_ENDIAN_LITTLE,
+ KBUFFER_ENDIAN_SAME_AS_HOST,
+};
+
+enum kbuffer_long_size {
+ KBUFFER_LSIZE_4,
+ KBUFFER_LSIZE_8,
+ KBUFFER_LSIZE_SAME_AS_HOST,
+};
+
+enum {
+ KBUFFER_TYPE_PADDING = 29,
+ KBUFFER_TYPE_TIME_EXTEND = 30,
+ KBUFFER_TYPE_TIME_STAMP = 31,
+};
+
+struct kbuffer;
+
+struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian);
+void kbuffer_free(struct kbuffer *kbuf);
+int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer);
+void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts);
+void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts);
+unsigned long long kbuffer_timestamp(struct kbuffer *kbuf);
+unsigned long long kbuffer_subbuf_timestamp(struct kbuffer *kbuf, void *subbuf);
+unsigned int kbuffer_ptr_delta(struct kbuffer *kbuf, void *ptr);
+
+void *kbuffer_translate_data(int swap, void *data, unsigned int *size);
+
+void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts);
+
+int kbuffer_curr_index(struct kbuffer *kbuf);
+
+int kbuffer_curr_offset(struct kbuffer *kbuf);
+int kbuffer_curr_size(struct kbuffer *kbuf);
+int kbuffer_event_size(struct kbuffer *kbuf);
+int kbuffer_missed_events(struct kbuffer *kbuf);
+int kbuffer_subbuffer_size(struct kbuffer *kbuf);
+
+void kbuffer_set_old_format(struct kbuffer *kbuf);
+int kbuffer_start_of_data(struct kbuffer *kbuf);
+
+/* Debugging */
+
+struct kbuffer_raw_info {
+ int type;
+ int length;
+ unsigned long long delta;
+ void *next;
+};
+
+/* Read raw data */
+struct kbuffer_raw_info *kbuffer_raw_get(struct kbuffer *kbuf, void *subbuf,
+ struct kbuffer_raw_info *info);
+
+#endif /* _K_BUFFER_H */
diff --git a/include/traceevent/trace-seq.h b/include/traceevent/trace-seq.h
new file mode 100644
index 0000000..217492f
--- /dev/null
+++ b/include/traceevent/trace-seq.h
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+
+#ifndef _TRACE_SEQ_H
+#define _TRACE_SEQ_H
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* ----------------------- trace_seq ----------------------- */
+
+#ifndef TRACE_SEQ_BUF_SIZE
+#define TRACE_SEQ_BUF_SIZE 4096
+#endif
+
+enum trace_seq_fail {
+ TRACE_SEQ__GOOD,
+ TRACE_SEQ__BUFFER_POISONED,
+ TRACE_SEQ__MEM_ALLOC_FAILED,
+};
+
+/*
+ * Trace sequences are used to allow a function to call several other functions
+ * to create a string of data to use (up to a max of PAGE_SIZE).
+ */
+
+struct trace_seq {
+ char *buffer;
+ unsigned int buffer_size;
+ unsigned int len;
+ unsigned int readpos;
+ enum trace_seq_fail state;
+};
+
+void trace_seq_init(struct trace_seq *s);
+void trace_seq_reset(struct trace_seq *s);
+void trace_seq_destroy(struct trace_seq *s);
+
+extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
+ __attribute__ ((format (printf, 2, 0)));
+
+extern int trace_seq_puts(struct trace_seq *s, const char *str);
+extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
+
+extern void trace_seq_terminate(struct trace_seq *s);
+
+extern int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp);
+extern int trace_seq_do_printf(struct trace_seq *s);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _TRACE_SEQ_H */
diff --git a/libtraceevent.pc.template b/libtraceevent.pc.template
new file mode 100644
index 0000000..1ab046f
--- /dev/null
+++ b/libtraceevent.pc.template
@@ -0,0 +1,10 @@
+prefix=INSTALL_PREFIX
+libdir=${prefix}/LIB_DIR
+includedir=${prefix}/HEADER_DIR
+
+Name: libtraceevent
+URL: https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
+Description: Linux kernel trace event library
+Version: LIB_VERSION
+Cflags: -I${includedir}
+Libs: -L${libdir} -ltraceevent
diff --git a/plugins/Build b/plugins/Build
new file mode 100644
index 0000000..dd4da82
--- /dev/null
+++ b/plugins/Build
@@ -0,0 +1,12 @@
+plugin_jbd2-y += plugin_jbd2.o
+plugin_hrtimer-y += plugin_hrtimer.o
+plugin_kmem-y += plugin_kmem.o
+plugin_kvm-y += plugin_kvm.o
+plugin_mac80211-y += plugin_mac80211.o
+plugin_sched_switch-y += plugin_sched_switch.o
+plugin_function-y += plugin_function.o
+plugin_futex-y += plugin_futex.o
+plugin_xen-y += plugin_xen.o
+plugin_scsi-y += plugin_scsi.o
+plugin_cfg80211-y += plugin_cfg80211.o
+plugin_tlb-y += plugin_tlb.o
\ No newline at end of file
diff --git a/plugins/Makefile b/plugins/Makefile
new file mode 100644
index 0000000..4c8cb17
--- /dev/null
+++ b/plugins/Makefile
@@ -0,0 +1,166 @@
+# SPDX-License-Identifier: GPL-2.0
+
+#MAKEFLAGS += --no-print-directory
+
+
+# Makefiles suck: This macro sets a default value of $(2) for the
+# variable named by $(1), unless the variable has been set by
+# environment or command line. This is necessary for CC and AR
+# because make sets default values, so the simpler ?= approach
+# won't work as expected.
+define allow-override
+ $(if $(or $(findstring environment,$(origin $(1))),\
+ $(findstring command line,$(origin $(1)))),,\
+ $(eval $(1) = $(2)))
+endef
+
+# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+$(call allow-override,NM,$(CROSS_COMPILE)nm)
+$(call allow-override,PKG_CONFIG,pkg-config)
+
+EXT = -std=gnu99
+INSTALL = install
+
+# Use DESTDIR for installing into a different root directory.
+# This is useful for building a package. The program will be
+# installed in this directory as if it was the root directory.
+# Then the build tool can move it later.
+DESTDIR ?=
+DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
+
+LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
+ifeq ($(LP64), 1)
+ libdir_relative_tmp = lib64
+else
+ libdir_relative_tmp = lib
+endif
+
+libdir_relative ?= $(libdir_relative_tmp)
+prefix ?= /usr/local
+libdir = $(prefix)/$(libdir_relative)
+
+include ../scripts/utils.mk
+
+# copy a bit from Linux kbuild
+
+ifeq ("$(origin V)", "command line")
+ VERBOSE = $(V)
+endif
+ifndef VERBOSE
+ VERBOSE = 0
+endif
+
+# Shell quotes
+plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
+
+CONFIG_INCLUDES =
+CONFIG_LIBS =
+CONFIG_FLAGS =
+
+OBJ = $@
+N =
+
+INCLUDES = -I. -I.. -I../src -I $(srctree)/include -I $(EP_HEADERS_DIR) $(CONFIG_INCLUDES)
+
+# Set compile option CFLAGS
+ifdef EXTRA_CFLAGS
+ CFLAGS := $(EXTRA_CFLAGS)
+else
+ CFLAGS := -g -Wall
+endif
+
+# Append required CFLAGS
+override CFLAGS += -fPIC
+override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
+override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
+
+ifeq ($(VERBOSE),1)
+ Q =
+else
+ Q = @
+endif
+
+export srctree OUTPUT CC LD CFLAGS V
+
+DYNAMIC_LIST_FILE := $(bdir)/libtraceevent-dynamic-list
+
+PLUGINS = plugin_jbd2.so
+PLUGINS += plugin_hrtimer.so
+PLUGINS += plugin_kmem.so
+PLUGINS += plugin_kvm.so
+PLUGINS += plugin_mac80211.so
+PLUGINS += plugin_sched_switch.so
+PLUGINS += plugin_function.so
+PLUGINS += plugin_futex.so
+PLUGINS += plugin_xen.so
+PLUGINS += plugin_scsi.so
+PLUGINS += plugin_cfg80211.so
+PLUGINS += plugin_tlb.so
+
+PLUGINS := $(PLUGINS:%.so=$(bdir)/%.so)
+DEPS := $(PLUGINS:$(bdir)/%.so=$(bdir)/.%.d)
+
+plugins: $(PLUGINS) $(DYNAMIC_LIST_FILE)
+
+$(PLUGINS): | $(bdir)
+$(DEPS): | $(bdir)
+
+$(bdir)/%.so: $(srctree)/plugins/%.c
+ $(Q)$(call do_plugin_build)
+
+define update_dir
+ (echo $1 > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ echo ' UPDATE $@'; \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+tags: force
+ $(RM) tags
+ find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
+ --regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
+
+TAGS: force
+ $(RM) TAGS
+ find . -name '*.[ch]' | xargs etags \
+ --regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
+
+define do_install_plugins
+ for plugin in $1; do \
+ $(call do_install,$$plugin,$(plugin_dir_SQ)); \
+ done
+endef
+
+define do_generate_dynamic_list_file
+ symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \
+ xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo`;\
+ if [ "$$symbol_type" = "U W" ];then \
+ (echo '{'; \
+ $(NM) -u -D $1 | awk 'NF>1 {sub("@.*", "", $$2); print "\t"$$2";"}' | sort -u;\
+ echo '};'; \
+ ) > $2; \
+ else \
+ (echo Either missing one of [$1] or bad version of $(NM)) 1>&2;\
+ fi
+endef
+
+$(DYNAMIC_LIST_FILE): $(PLUGINS)
+ $(Q)($(print_gen)$(call do_generate_dynamic_list_file, $(PLUGINS), $@))
+
+install: $(PLUGINS)
+ $(Q)$(call do_install_plugins, $(PLUGINS))
+
+clean:
+ $(Q)$(call do_clean, $(DYNAMIC_LIST_FILE) $(PLUGINS))
+
+PHONY += force plugins $(DYNAMIC_LIST_FILE)
+force:
+
+# Declare the contents of the .PHONY variable as phony. We keep that
+# information in a variable so we can use it in if_changed and friends.
+.PHONY: $(PHONY)
diff --git a/plugins/plugin_cfg80211.c b/plugins/plugin_cfg80211.c
new file mode 100644
index 0000000..3d43b56
--- /dev/null
+++ b/plugins/plugin_cfg80211.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <endian.h>
+#include "event-parse.h"
+
+/*
+ * From glibc endian.h, for older systems where it is not present, e.g.: RHEL5,
+ * Fedora6.
+ */
+#ifndef le16toh
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+# define le16toh(x) (x)
+# else
+# define le16toh(x) __bswap_16 (x)
+# endif
+#endif
+
+
+static unsigned long long
+process___le16_to_cpup(struct trace_seq *s, unsigned long long *args)
+{
+ uint16_t *val = (uint16_t *) (unsigned long) args[0];
+ return val ? (long long) le16toh(*val) : 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_print_function(tep,
+ process___le16_to_cpup,
+ TEP_FUNC_ARG_INT,
+ "__le16_to_cpup",
+ TEP_FUNC_ARG_PTR,
+ TEP_FUNC_ARG_VOID);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_print_function(tep, process___le16_to_cpup,
+ "__le16_to_cpup");
+}
diff --git a/plugins/plugin_function.c b/plugins/plugin_function.c
new file mode 100644
index 0000000..2d6509b
--- /dev/null
+++ b/plugins/plugin_function.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+#include "event-utils.h"
+#include "trace-seq.h"
+
+#define __weak __attribute__((weak))
+
+/* Export this for applications to override it */
+__weak const char *tep_func_repeat_format = "%6.1000d";
+
+static struct func_stack {
+ int size;
+ char **stack;
+} *fstack;
+
+static int cpus = -1;
+
+#define STK_BLK 10
+
+struct tep_plugin_option plugin_options[] =
+{
+ {
+ .name = "parent",
+ .plugin_alias = "ftrace",
+ .description =
+ "Print parent of functions for function events",
+ },
+ {
+ .name = "indent",
+ .plugin_alias = "ftrace",
+ .description =
+ "Try to show function call indents, based on parents",
+ .set = 1,
+ },
+ {
+ .name = "offset",
+ .plugin_alias = "ftrace",
+ .description =
+ "Show function names as well as their offsets",
+ .set = 0,
+ },
+ {
+ .name = NULL,
+ }
+};
+
+static struct tep_plugin_option *ftrace_parent = &plugin_options[0];
+static struct tep_plugin_option *ftrace_indent = &plugin_options[1];
+static struct tep_plugin_option *ftrace_offset = &plugin_options[2];
+
+static void add_child(struct func_stack *stack, const char *child, int pos)
+{
+ int i;
+
+ if (!child)
+ return;
+
+ if (pos < stack->size)
+ free(stack->stack[pos]);
+ else {
+ char **ptr;
+
+ ptr = realloc(stack->stack, sizeof(char *) *
+ (stack->size + STK_BLK));
+ if (!ptr) {
+ tep_warning("could not allocate plugin memory\n");
+ return;
+ }
+
+ stack->stack = ptr;
+
+ for (i = stack->size; i < stack->size + STK_BLK; i++)
+ stack->stack[i] = NULL;
+ stack->size += STK_BLK;
+ }
+
+ stack->stack[pos] = strdup(child);
+}
+
+static int add_and_get_index(const char *parent, const char *child, int cpu)
+{
+ int i;
+
+ if (cpu < 0)
+ return 0;
+
+ if (cpu > cpus) {
+ struct func_stack *ptr;
+
+ ptr = realloc(fstack, sizeof(*fstack) * (cpu + 1));
+ if (!ptr) {
+ tep_warning("could not allocate plugin memory\n");
+ return 0;
+ }
+
+ fstack = ptr;
+
+ /* Account for holes in the cpu count */
+ for (i = cpus + 1; i <= cpu; i++)
+ memset(&fstack[i], 0, sizeof(fstack[i]));
+ cpus = cpu;
+ }
+
+ for (i = 0; i < fstack[cpu].size && fstack[cpu].stack[i]; i++) {
+ if (strcmp(parent, fstack[cpu].stack[i]) == 0) {
+ add_child(&fstack[cpu], child, i+1);
+ return i;
+ }
+ }
+
+ /* Not found */
+ add_child(&fstack[cpu], parent, 0);
+ add_child(&fstack[cpu], child, 1);
+ return 0;
+}
+
+static void show_function(struct trace_seq *s, struct tep_handle *tep,
+ const char *func, unsigned long long function)
+{
+ unsigned long long offset;
+
+ trace_seq_printf(s, "%s", func);
+ if (ftrace_offset->set) {
+ offset = tep_find_function_address(tep, function);
+ trace_seq_printf(s, "+0x%x ", (int)(function - offset));
+ }
+}
+
+static int function_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_handle *tep = event->tep;
+ unsigned long long function;
+ unsigned long long pfunction;
+ const char *func;
+ const char *parent;
+ int index = 0;
+
+ if (tep_get_field_val(s, event, "ip", record, &function, 1))
+ return trace_seq_putc(s, '!');
+
+ func = tep_find_function(tep, function);
+
+ if (tep_get_field_val(s, event, "parent_ip", record, &pfunction, 1))
+ return trace_seq_putc(s, '!');
+
+ parent = tep_find_function(tep, pfunction);
+
+ if (parent && ftrace_indent->set)
+ index = add_and_get_index(parent, func, record->cpu);
+
+ trace_seq_printf(s, "%*s", index*3, "");
+
+ if (func)
+ show_function(s, tep, func, function);
+ else
+ trace_seq_printf(s, "0x%llx", function);
+
+ if (ftrace_parent->set) {
+ trace_seq_printf(s, " <-- ");
+ if (parent)
+ show_function(s, tep, parent, pfunction);
+ else
+ trace_seq_printf(s, "0x%llx", pfunction);
+ }
+
+ return 0;
+}
+
+static int trace_func_repeat_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_handle *tep = event->tep;
+ unsigned long long count, top_delta, bottom_delta;
+ struct tep_record dummy;
+
+ function_handler(s, record, event, context);
+
+ if (tep_get_field_val(s, event, "count", record, &count, 1))
+ return trace_seq_putc(s, '!');
+
+ if (tep_get_field_val(s, event, "top_delta_ts", record, &top_delta, 1))
+ return trace_seq_putc(s, '!');
+
+ if (tep_get_field_val(s, event, "bottom_delta_ts", record, &bottom_delta, 1))
+ return trace_seq_putc(s, '!');
+
+ trace_seq_printf(s, " (count: %lld last_ts: ", count);
+
+ memcpy(&dummy, record, sizeof(dummy));
+ dummy.ts -= (top_delta << 32) | bottom_delta;
+
+ tep_print_event(tep, s, &dummy, tep_func_repeat_format, TEP_PRINT_TIME);
+
+ trace_seq_puts(s, ")");
+
+ return 0;
+}
+
+static int
+trace_stack_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_format_field *field;
+ unsigned long long addr;
+ const char *func;
+ int long_size;
+ void *data = record->data;
+
+ field = tep_find_any_field(event, "caller");
+ if (!field) {
+ trace_seq_printf(s, "<CANT FIND FIELD %s>", "caller");
+ return 0;
+ }
+
+ trace_seq_puts(s, "<stack trace >\n");
+
+ long_size = tep_get_long_size(event->tep);
+
+ for (data += field->offset; data < record->data + record->size;
+ data += long_size) {
+ addr = tep_read_number(event->tep, data, long_size);
+
+ if ((long_size == 8 && addr == (unsigned long long)-1) ||
+ ((int)addr == -1))
+ break;
+
+ func = tep_find_function(event->tep, addr);
+ if (func) {
+ trace_seq_puts(s, "=> ");
+ show_function(s, event->tep, func, addr);
+ trace_seq_printf(s, " (%llx)\n", addr);
+ } else
+ trace_seq_printf(s, "=> %llx\n", addr);
+ }
+
+ return 0;
+}
+
+static int
+trace_raw_data_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_format_field *field;
+ unsigned long long id;
+ int long_size;
+ void *data = record->data;
+
+ if (tep_get_field_val(s, event, "id", record, &id, 1))
+ return trace_seq_putc(s, '!');
+
+ trace_seq_printf(s, "# %llx", id);
+
+ field = tep_find_any_field(event, "buf");
+ if (!field) {
+ trace_seq_printf(s, "<CANT FIND FIELD %s>", "buf");
+ return 0;
+ }
+
+ long_size = tep_get_long_size(event->tep);
+
+ for (data += field->offset; data < record->data + record->size;
+ data += long_size) {
+ int size = sizeof(long);
+ int left = (record->data + record->size) - data;
+ int i;
+
+ if (size > left)
+ size = left;
+
+ for (i = 0; i < size; i++)
+ trace_seq_printf(s, " %02x", *(unsigned char *)(data + i));
+ }
+
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1, "ftrace", "function",
+ function_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "ftrace", "kernel_stack",
+ trace_stack_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "ftrace", "raw_data",
+ trace_raw_data_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "ftrace", "func_repeats",
+ trace_func_repeat_handler, NULL);
+
+ tep_plugin_add_options("ftrace", plugin_options);
+
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ int i, x;
+
+ tep_unregister_event_handler(tep, -1, "ftrace", "function",
+ function_handler, NULL);
+
+ for (i = 0; i <= cpus; i++) {
+ for (x = 0; x < fstack[i].size && fstack[i].stack[x]; x++)
+ free(fstack[i].stack[x]);
+ free(fstack[i].stack);
+ }
+
+ tep_plugin_remove_options(plugin_options);
+
+ free(fstack);
+ fstack = NULL;
+ cpus = -1;
+}
diff --git a/plugins/plugin_futex.c b/plugins/plugin_futex.c
new file mode 100644
index 0000000..eb7c9f8
--- /dev/null
+++ b/plugins/plugin_futex.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2017 National Instruments Corp.
+ *
+ * Author: Julia Cartwright <julia@ni.com>
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/futex.h>
+
+#include "event-parse.h"
+
+#define ARRAY_SIZE(_a) (sizeof(_a) / sizeof((_a)[0]))
+
+struct futex_args {
+ unsigned long long uaddr;
+ unsigned long long op;
+ unsigned long long val;
+ unsigned long long utime; /* or val2 */
+ unsigned long long uaddr2;
+ unsigned long long val3;
+};
+
+struct futex_op {
+ const char *name;
+ const char *fmt_val;
+ const char *fmt_utime;
+ const char *fmt_uaddr2;
+ const char *fmt_val3;
+};
+
+static const struct futex_op futex_op_tbl[] = {
+ { "FUTEX_WAIT", " val=0x%08llx", " utime=0x%08llx", NULL, NULL },
+ { "FUTEX_WAKE", " val=%llu", NULL, NULL, NULL },
+ { "FUTEX_FD", " val=%llu", NULL, NULL, NULL },
+ { "FUTEX_REQUEUE", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", NULL },
+ { "FUTEX_CMP_REQUEUE", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" },
+ { "FUTEX_WAKE_OP", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" },
+ { "FUTEX_LOCK_PI", NULL, " utime=0x%08llx", NULL, NULL },
+ { "FUTEX_UNLOCK_PI", NULL, NULL, NULL, NULL },
+ { "FUTEX_TRYLOCK_PI", NULL, NULL, NULL, NULL },
+ { "FUTEX_WAIT_BITSET", " val=0x%08llx", " utime=0x%08llx", NULL, " val3=0x%08llx" },
+ { "FUTEX_WAKE_BITSET", " val=%llu", NULL, NULL, " val3=0x%08llx" },
+ { "FUTEX_WAIT_REQUEUE_PI", " val=0x%08llx", " utime=0x%08llx", " uaddr2=0x%08llx", " val3=0x%08llx" },
+ { "FUTEX_CMP_REQUEUE_PI", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" },
+};
+
+
+static void futex_print(struct trace_seq *s, const struct futex_args *args,
+ const struct futex_op *fop)
+{
+ trace_seq_printf(s, " uaddr=0x%08llx", args->uaddr);
+
+ if (fop->fmt_val)
+ trace_seq_printf(s, fop->fmt_val, args->val);
+
+ if (fop->fmt_utime)
+ trace_seq_printf(s,fop->fmt_utime, args->utime);
+
+ if (fop->fmt_uaddr2)
+ trace_seq_printf(s, fop->fmt_uaddr2, args->uaddr2);
+
+ if (fop->fmt_val3)
+ trace_seq_printf(s, fop->fmt_val3, args->val3);
+}
+
+static int futex_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ const struct futex_op *fop;
+ struct futex_args args;
+ unsigned long long cmd;
+
+ if (tep_get_field_val(s, event, "uaddr", record, &args.uaddr, 1))
+ return 1;
+
+ if (tep_get_field_val(s, event, "op", record, &args.op, 1))
+ return 1;
+
+ if (tep_get_field_val(s, event, "val", record, &args.val, 1))
+ return 1;
+
+ if (tep_get_field_val(s, event, "utime", record, &args.utime, 1))
+ return 1;
+
+ if (tep_get_field_val(s, event, "uaddr2", record, &args.uaddr2, 1))
+ return 1;
+
+ if (tep_get_field_val(s, event, "val3", record, &args.val3, 1))
+ return 1;
+
+ cmd = args.op & FUTEX_CMD_MASK;
+ if (cmd >= ARRAY_SIZE(futex_op_tbl))
+ return 1;
+
+ fop = &futex_op_tbl[cmd];
+
+ trace_seq_printf(s, "op=%s", fop->name);
+
+ if (args.op & FUTEX_PRIVATE_FLAG)
+ trace_seq_puts(s, "|FUTEX_PRIVATE_FLAG");
+
+ if (args.op & FUTEX_CLOCK_REALTIME)
+ trace_seq_puts(s, "|FUTEX_CLOCK_REALTIME");
+
+ futex_print(s, &args, fop);
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1, "syscalls", "sys_enter_futex",
+ futex_handler, NULL);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1, "syscalls", "sys_enter_futex",
+ futex_handler, NULL);
+}
diff --git a/plugins/plugin_hrtimer.c b/plugins/plugin_hrtimer.c
new file mode 100644
index 0000000..d984667
--- /dev/null
+++ b/plugins/plugin_hrtimer.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+static int timer_expire_handler(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ trace_seq_printf(s, "hrtimer=");
+
+ if (tep_print_num_field(s, "0x%llx", event, "timer",
+ record, 0) == -1)
+ tep_print_num_field(s, "0x%llx", event, "hrtimer",
+ record, 1);
+
+ trace_seq_printf(s, " now=");
+
+ tep_print_num_field(s, "%llu", event, "now", record, 1);
+
+ tep_print_func_field(s, " function=%s", event, "function",
+ record, 0);
+ return 0;
+}
+
+static int timer_start_handler(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ trace_seq_printf(s, "hrtimer=");
+
+ if (tep_print_num_field(s, "0x%llx", event, "timer",
+ record, 0) == -1)
+ tep_print_num_field(s, "0x%llx", event, "hrtimer",
+ record, 1);
+
+ tep_print_func_field(s, " function=%s", event, "function",
+ record, 0);
+
+ trace_seq_printf(s, " expires=");
+ tep_print_num_field(s, "%llu", event, "expires", record, 1);
+
+ trace_seq_printf(s, " softexpires=");
+ tep_print_num_field(s, "%llu", event, "softexpires", record, 1);
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1,
+ "timer", "hrtimer_expire_entry",
+ timer_expire_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "timer", "hrtimer_start",
+ timer_start_handler, NULL);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1,
+ "timer", "hrtimer_expire_entry",
+ timer_expire_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "timer", "hrtimer_start",
+ timer_start_handler, NULL);
+}
diff --git a/plugins/plugin_jbd2.c b/plugins/plugin_jbd2.c
new file mode 100644
index 0000000..69111a6
--- /dev/null
+++ b/plugins/plugin_jbd2.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+#define MINORBITS 20
+#define MINORMASK ((1U << MINORBITS) - 1)
+
+#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
+#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
+
+static unsigned long long
+process_jbd2_dev_to_name(struct trace_seq *s, unsigned long long *args)
+{
+ unsigned int dev = args[0];
+
+ trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));
+ return 0;
+}
+
+static unsigned long long
+process_jiffies_to_msecs(struct trace_seq *s, unsigned long long *args)
+{
+ unsigned long long jiffies = args[0];
+
+ trace_seq_printf(s, "%lld", jiffies);
+ return jiffies;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_print_function(tep,
+ process_jbd2_dev_to_name,
+ TEP_FUNC_ARG_STRING,
+ "jbd2_dev_to_name",
+ TEP_FUNC_ARG_INT,
+ TEP_FUNC_ARG_VOID);
+
+ tep_register_print_function(tep,
+ process_jiffies_to_msecs,
+ TEP_FUNC_ARG_LONG,
+ "jiffies_to_msecs",
+ TEP_FUNC_ARG_LONG,
+ TEP_FUNC_ARG_VOID);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_print_function(tep, process_jbd2_dev_to_name,
+ "jbd2_dev_to_name");
+
+ tep_unregister_print_function(tep, process_jiffies_to_msecs,
+ "jiffies_to_msecs");
+}
diff --git a/plugins/plugin_kmem.c b/plugins/plugin_kmem.c
new file mode 100644
index 0000000..4b4f7f9
--- /dev/null
+++ b/plugins/plugin_kmem.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+static int call_site_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_format_field *field;
+ unsigned long long val, addr;
+ void *data = record->data;
+ const char *func;
+
+ field = tep_find_field(event, "call_site");
+ if (!field)
+ return 1;
+
+ if (tep_read_number_field(field, data, &val))
+ return 1;
+
+ func = tep_find_function(event->tep, val);
+ if (!func)
+ return 1;
+
+ addr = tep_find_function_address(event->tep, val);
+
+ trace_seq_printf(s, "(%s+0x%x) ", func, (int)(val - addr));
+ return 1;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1, "kmem", "kfree",
+ call_site_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kmem", "kmalloc",
+ call_site_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kmem", "kmalloc_node",
+ call_site_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kmem", "kmem_cache_alloc",
+ call_site_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kmem",
+ "kmem_cache_alloc_node",
+ call_site_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kmem", "kmem_cache_free",
+ call_site_handler, NULL);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1, "kmem", "kfree",
+ call_site_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kmem", "kmalloc",
+ call_site_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kmem", "kmalloc_node",
+ call_site_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kmem", "kmem_cache_alloc",
+ call_site_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kmem",
+ "kmem_cache_alloc_node",
+ call_site_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kmem", "kmem_cache_free",
+ call_site_handler, NULL);
+}
diff --git a/plugins/plugin_kvm.c b/plugins/plugin_kvm.c
new file mode 100644
index 0000000..9852c35
--- /dev/null
+++ b/plugins/plugin_kvm.c
@@ -0,0 +1,591 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+#define __weak __attribute__((weak))
+
+#ifdef HAVE_UDIS86
+
+#include <udis86.h>
+
+static ud_t ud;
+
+static void init_disassembler(void)
+{
+ ud_init(&ud);
+ ud_set_syntax(&ud, UD_SYN_ATT);
+}
+
+static const char *disassemble(unsigned char *insn, int len, uint64_t rip,
+ int cr0_pe, int eflags_vm,
+ int cs_d, int cs_l)
+{
+ int mode;
+
+ if (!cr0_pe)
+ mode = 16;
+ else if (eflags_vm)
+ mode = 16;
+ else if (cs_l)
+ mode = 64;
+ else if (cs_d)
+ mode = 32;
+ else
+ mode = 16;
+
+ ud_set_pc(&ud, rip);
+ ud_set_mode(&ud, mode);
+ ud_set_input_buffer(&ud, insn, len);
+ ud_disassemble(&ud);
+ return ud_insn_asm(&ud);
+}
+
+#else
+
+static void init_disassembler(void)
+{
+}
+
+static const char *disassemble(unsigned char *insn, int len, uint64_t rip,
+ int cr0_pe, int eflags_vm,
+ int cs_d, int cs_l)
+{
+ static char out[15*3+1];
+ int i;
+
+ for (i = 0; i < len; ++i)
+ sprintf(out + i * 3, "%02x ", insn[i]);
+ out[len*3-1] = '\0';
+ return out;
+}
+
+#endif
+
+
+#define VMX_EXIT_REASONS \
+ _ER(EXCEPTION_NMI, 0) \
+ _ER(EXTERNAL_INTERRUPT, 1) \
+ _ER(TRIPLE_FAULT, 2) \
+ _ER(PENDING_INTERRUPT, 7) \
+ _ER(NMI_WINDOW, 8) \
+ _ER(TASK_SWITCH, 9) \
+ _ER(CPUID, 10) \
+ _ER(HLT, 12) \
+ _ER(INVD, 13) \
+ _ER(INVLPG, 14) \
+ _ER(RDPMC, 15) \
+ _ER(RDTSC, 16) \
+ _ER(VMCALL, 18) \
+ _ER(VMCLEAR, 19) \
+ _ER(VMLAUNCH, 20) \
+ _ER(VMPTRLD, 21) \
+ _ER(VMPTRST, 22) \
+ _ER(VMREAD, 23) \
+ _ER(VMRESUME, 24) \
+ _ER(VMWRITE, 25) \
+ _ER(VMOFF, 26) \
+ _ER(VMON, 27) \
+ _ER(CR_ACCESS, 28) \
+ _ER(DR_ACCESS, 29) \
+ _ER(IO_INSTRUCTION, 30) \
+ _ER(MSR_READ, 31) \
+ _ER(MSR_WRITE, 32) \
+ _ER(MWAIT_INSTRUCTION, 36) \
+ _ER(MONITOR_INSTRUCTION, 39) \
+ _ER(PAUSE_INSTRUCTION, 40) \
+ _ER(MCE_DURING_VMENTRY, 41) \
+ _ER(TPR_BELOW_THRESHOLD, 43) \
+ _ER(APIC_ACCESS, 44) \
+ _ER(EOI_INDUCED, 45) \
+ _ER(EPT_VIOLATION, 48) \
+ _ER(EPT_MISCONFIG, 49) \
+ _ER(INVEPT, 50) \
+ _ER(PREEMPTION_TIMER, 52) \
+ _ER(WBINVD, 54) \
+ _ER(XSETBV, 55) \
+ _ER(APIC_WRITE, 56) \
+ _ER(INVPCID, 58) \
+ _ER(PML_FULL, 62) \
+ _ER(XSAVES, 63) \
+ _ER(XRSTORS, 64)
+
+#define SVM_EXIT_REASONS \
+ _ER(EXIT_READ_CR0, 0x000) \
+ _ER(EXIT_READ_CR3, 0x003) \
+ _ER(EXIT_READ_CR4, 0x004) \
+ _ER(EXIT_READ_CR8, 0x008) \
+ _ER(EXIT_WRITE_CR0, 0x010) \
+ _ER(EXIT_WRITE_CR3, 0x013) \
+ _ER(EXIT_WRITE_CR4, 0x014) \
+ _ER(EXIT_WRITE_CR8, 0x018) \
+ _ER(EXIT_READ_DR0, 0x020) \
+ _ER(EXIT_READ_DR1, 0x021) \
+ _ER(EXIT_READ_DR2, 0x022) \
+ _ER(EXIT_READ_DR3, 0x023) \
+ _ER(EXIT_READ_DR4, 0x024) \
+ _ER(EXIT_READ_DR5, 0x025) \
+ _ER(EXIT_READ_DR6, 0x026) \
+ _ER(EXIT_READ_DR7, 0x027) \
+ _ER(EXIT_WRITE_DR0, 0x030) \
+ _ER(EXIT_WRITE_DR1, 0x031) \
+ _ER(EXIT_WRITE_DR2, 0x032) \
+ _ER(EXIT_WRITE_DR3, 0x033) \
+ _ER(EXIT_WRITE_DR4, 0x034) \
+ _ER(EXIT_WRITE_DR5, 0x035) \
+ _ER(EXIT_WRITE_DR6, 0x036) \
+ _ER(EXIT_WRITE_DR7, 0x037) \
+ _ER(EXIT_EXCP_DE, 0x040) \
+ _ER(EXIT_EXCP_DB, 0x041) \
+ _ER(EXIT_EXCP_BP, 0x043) \
+ _ER(EXIT_EXCP_OF, 0x044) \
+ _ER(EXIT_EXCP_BR, 0x045) \
+ _ER(EXIT_EXCP_UD, 0x046) \
+ _ER(EXIT_EXCP_NM, 0x047) \
+ _ER(EXIT_EXCP_DF, 0x048) \
+ _ER(EXIT_EXCP_TS, 0x04a) \
+ _ER(EXIT_EXCP_NP, 0x04b) \
+ _ER(EXIT_EXCP_SS, 0x04c) \
+ _ER(EXIT_EXCP_GP, 0x04d) \
+ _ER(EXIT_EXCP_PF, 0x04e) \
+ _ER(EXIT_EXCP_MF, 0x050) \
+ _ER(EXIT_EXCP_AC, 0x051) \
+ _ER(EXIT_EXCP_MC, 0x052) \
+ _ER(EXIT_EXCP_XF, 0x053) \
+ _ER(EXIT_INTR, 0x060) \
+ _ER(EXIT_NMI, 0x061) \
+ _ER(EXIT_SMI, 0x062) \
+ _ER(EXIT_INIT, 0x063) \
+ _ER(EXIT_VINTR, 0x064) \
+ _ER(EXIT_CR0_SEL_WRITE, 0x065) \
+ _ER(EXIT_IDTR_READ, 0x066) \
+ _ER(EXIT_GDTR_READ, 0x067) \
+ _ER(EXIT_LDTR_READ, 0x068) \
+ _ER(EXIT_TR_READ, 0x069) \
+ _ER(EXIT_IDTR_WRITE, 0x06a) \
+ _ER(EXIT_GDTR_WRITE, 0x06b) \
+ _ER(EXIT_LDTR_WRITE, 0x06c) \
+ _ER(EXIT_TR_WRITE, 0x06d) \
+ _ER(EXIT_RDTSC, 0x06e) \
+ _ER(EXIT_RDPMC, 0x06f) \
+ _ER(EXIT_PUSHF, 0x070) \
+ _ER(EXIT_POPF, 0x071) \
+ _ER(EXIT_CPUID, 0x072) \
+ _ER(EXIT_RSM, 0x073) \
+ _ER(EXIT_IRET, 0x074) \
+ _ER(EXIT_SWINT, 0x075) \
+ _ER(EXIT_INVD, 0x076) \
+ _ER(EXIT_PAUSE, 0x077) \
+ _ER(EXIT_HLT, 0x078) \
+ _ER(EXIT_INVLPG, 0x079) \
+ _ER(EXIT_INVLPGA, 0x07a) \
+ _ER(EXIT_IOIO, 0x07b) \
+ _ER(EXIT_MSR, 0x07c) \
+ _ER(EXIT_TASK_SWITCH, 0x07d) \
+ _ER(EXIT_FERR_FREEZE, 0x07e) \
+ _ER(EXIT_SHUTDOWN, 0x07f) \
+ _ER(EXIT_VMRUN, 0x080) \
+ _ER(EXIT_VMMCALL, 0x081) \
+ _ER(EXIT_VMLOAD, 0x082) \
+ _ER(EXIT_VMSAVE, 0x083) \
+ _ER(EXIT_STGI, 0x084) \
+ _ER(EXIT_CLGI, 0x085) \
+ _ER(EXIT_SKINIT, 0x086) \
+ _ER(EXIT_RDTSCP, 0x087) \
+ _ER(EXIT_ICEBP, 0x088) \
+ _ER(EXIT_WBINVD, 0x089) \
+ _ER(EXIT_MONITOR, 0x08a) \
+ _ER(EXIT_MWAIT, 0x08b) \
+ _ER(EXIT_MWAIT_COND, 0x08c) \
+ _ER(EXIT_XSETBV, 0x08d) \
+ _ER(EXIT_NPF, 0x400) \
+ _ER(EXIT_AVIC_INCOMPLETE_IPI, 0x401) \
+ _ER(EXIT_AVIC_UNACCELERATED_ACCESS, 0x402) \
+ _ER(EXIT_ERR, -1)
+
+#define _ER(reason, val) { #reason, val },
+struct str_values {
+ const char *str;
+ int val;
+};
+
+static struct str_values vmx_exit_reasons[] = {
+ VMX_EXIT_REASONS
+ { NULL, -1}
+};
+
+static struct str_values svm_exit_reasons[] = {
+ SVM_EXIT_REASONS
+ { NULL, -1}
+};
+
+static struct isa_exit_reasons {
+ unsigned isa;
+ struct str_values *strings;
+} isa_exit_reasons[] = {
+ { .isa = 1, .strings = vmx_exit_reasons },
+ { .isa = 2, .strings = svm_exit_reasons },
+ { }
+};
+
+static const char *find_exit_reason(unsigned isa, int val)
+{
+ struct str_values *strings = NULL;
+ int i;
+
+ for (i = 0; isa_exit_reasons[i].strings; ++i)
+ if (isa_exit_reasons[i].isa == isa) {
+ strings = isa_exit_reasons[i].strings;
+ break;
+ }
+ if (!strings)
+ return "UNKNOWN-ISA";
+ for (i = 0; strings[i].str; i++)
+ if (strings[i].val == val)
+ break;
+
+ return strings[i].str;
+}
+
+static int print_exit_reason(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, const char *field)
+{
+ unsigned long long isa;
+ unsigned long long val;
+ const char *reason;
+
+ if (tep_get_field_val(s, event, field, record, &val, 1) < 0)
+ return -1;
+
+ if (tep_get_field_val(s, event, "isa", record, &isa, 0) < 0)
+ isa = 1;
+
+ reason = find_exit_reason(isa, val);
+ if (reason)
+ trace_seq_printf(s, "reason %s", reason);
+ else
+ trace_seq_printf(s, "reason UNKNOWN (%llu)", val);
+ return 0;
+}
+
+__weak const char *tep_plugin_kvm_get_func(struct tep_event *event,
+ struct tep_record *record,
+ unsigned long long *val)
+{
+ return NULL;
+}
+
+__weak void tep_plugin_kvm_put_func(const char *func)
+{
+}
+
+
+static void add_rip_function(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, unsigned long long rip)
+{
+ unsigned long long ip = rip;
+ const char *func;
+
+ func = tep_plugin_kvm_get_func(event, record, &ip);
+ if (func) {
+ trace_seq_printf(s, " %s", func);
+ /* The application may upate ip to the start of the function */
+ if (ip != rip)
+ trace_seq_printf(s, "+0x%0llx", rip - ip);
+ tep_plugin_kvm_put_func(func);
+ }
+}
+
+static int kvm_exit_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long info1 = 0, info2 = 0;
+ unsigned long long rip;
+
+ if (print_exit_reason(s, record, event, "exit_reason") < 0)
+ return -1;
+
+ if (tep_get_field_val(s, event, "guest_rip", record, &rip, 1) < 0)
+ return -1;
+
+ trace_seq_printf(s, " rip 0x%llx", rip);
+
+ add_rip_function(s, record, event, rip);
+
+ if (tep_get_field_val(s, event, "info1", record, &info1, 0) >= 0
+ && tep_get_field_val(s, event, "info2", record, &info2, 0) >= 0)
+ trace_seq_printf(s, " info %llx %llx", info1, info2);
+
+ return 0;
+}
+
+static int kvm_entry_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long rip;
+
+ tep_print_num_field(s, " vcpu %u", event, "vcpu_id", record, 1);
+
+ if (tep_get_field_val(s, event, "rip", record, &rip, 1) < 0)
+ return -1;
+
+ trace_seq_printf(s, " rip 0x%llx", rip);
+ add_rip_function(s, record, event, rip);
+
+ return 0;
+}
+
+#define KVM_EMUL_INSN_F_CR0_PE (1 << 0)
+#define KVM_EMUL_INSN_F_EFL_VM (1 << 1)
+#define KVM_EMUL_INSN_F_CS_D (1 << 2)
+#define KVM_EMUL_INSN_F_CS_L (1 << 3)
+
+static int kvm_emulate_insn_handler(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long rip, csbase, len, flags, failed;
+ int llen;
+ uint8_t *insn;
+ const char *disasm;
+
+ if (tep_get_field_val(s, event, "rip", record, &rip, 1) < 0)
+ return -1;
+
+ if (tep_get_field_val(s, event, "csbase", record, &csbase, 1) < 0)
+ return -1;
+
+ if (tep_get_field_val(s, event, "len", record, &len, 1) < 0)
+ return -1;
+
+ if (tep_get_field_val(s, event, "flags", record, &flags, 1) < 0)
+ return -1;
+
+ if (tep_get_field_val(s, event, "failed", record, &failed, 1) < 0)
+ return -1;
+
+ insn = tep_get_field_raw(s, event, "insn", record, &llen, 1);
+ if (!insn)
+ return -1;
+
+ disasm = disassemble(insn, len, rip,
+ flags & KVM_EMUL_INSN_F_CR0_PE,
+ flags & KVM_EMUL_INSN_F_EFL_VM,
+ flags & KVM_EMUL_INSN_F_CS_D,
+ flags & KVM_EMUL_INSN_F_CS_L);
+
+ trace_seq_printf(s, "%llx:%llx", csbase, rip);
+ add_rip_function(s, record, event, rip);
+ trace_seq_printf(s, ": %s%s", disasm, failed ? " FAIL" : "");
+ return 0;
+}
+
+static int kvm_nested_vmexit_inject_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ if (print_exit_reason(s, record, event, "exit_code") < 0)
+ return -1;
+
+ tep_print_num_field(s, " info1 %llx", event, "exit_info1", record, 1);
+ tep_print_num_field(s, " info2 %llx", event, "exit_info2", record, 1);
+ tep_print_num_field(s, " int_info %llx", event, "exit_int_info", record, 1);
+ tep_print_num_field(s, " int_info_err %llx", event, "exit_int_info_err", record, 1);
+
+ return 0;
+}
+
+static int kvm_nested_vmexit_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long rip;
+
+ if (tep_get_field_val(s, event, "rip", record, &rip, 1) < 0)
+ return -1;
+
+ trace_seq_printf(s, " rip %llx", rip);
+ add_rip_function(s, record, event, rip);
+
+ return kvm_nested_vmexit_inject_handler(s, record, event, context);
+}
+
+union kvm_mmu_page_role {
+ unsigned word;
+ struct {
+ unsigned level:4;
+ unsigned cr4_pae:1;
+ unsigned quadrant:2;
+ unsigned direct:1;
+ unsigned access:3;
+ unsigned invalid:1;
+ unsigned nxe:1;
+ unsigned cr0_wp:1;
+ unsigned smep_and_not_wp:1;
+ unsigned smap_and_not_wp:1;
+ unsigned pad_for_nice_hex_output:8;
+ unsigned smm:8;
+ };
+};
+
+static int kvm_mmu_print_role(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long val;
+ static const char *access_str[] = {
+ "---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"
+ };
+ union kvm_mmu_page_role role;
+
+ if (tep_get_field_val(s, event, "role", record, &val, 1) < 0)
+ return -1;
+
+ role.word = (int)val;
+
+ /*
+ * We can only use the structure if file is of the same
+ * endianness.
+ */
+ if (tep_is_file_bigendian(event->tep) ==
+ tep_is_local_bigendian(event->tep)) {
+
+ trace_seq_printf(s, "%u q%u%s %s%s %spae %snxe %swp%s%s%s",
+ role.level,
+ role.quadrant,
+ role.direct ? " direct" : "",
+ access_str[role.access],
+ role.invalid ? " invalid" : "",
+ role.cr4_pae ? "" : "!",
+ role.nxe ? "" : "!",
+ role.cr0_wp ? "" : "!",
+ role.smep_and_not_wp ? " smep" : "",
+ role.smap_and_not_wp ? " smap" : "",
+ role.smm ? " smm" : "");
+ } else
+ trace_seq_printf(s, "WORD: %08x", role.word);
+
+ tep_print_num_field(s, " root %u ", event,
+ "root_count", record, 1);
+
+ if (tep_get_field_val(s, event, "unsync", record, &val, 1) < 0)
+ return -1;
+
+ trace_seq_printf(s, "%s%c", val ? "unsync" : "sync", 0);
+ return 0;
+}
+
+static int kvm_mmu_get_page_handler(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long val;
+
+ if (tep_get_field_val(s, event, "created", record, &val, 1) < 0)
+ return -1;
+
+ trace_seq_printf(s, "%s ", val ? "new" : "existing");
+
+ if (tep_get_field_val(s, event, "gfn", record, &val, 1) < 0)
+ return -1;
+
+ trace_seq_printf(s, "sp gfn %llx ", val);
+ return kvm_mmu_print_role(s, record, event, context);
+}
+
+#define PT_WRITABLE_SHIFT 1
+#define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
+
+static unsigned long long
+process_is_writable_pte(struct trace_seq *s, unsigned long long *args)
+{
+ unsigned long pte = args[0];
+ return pte & PT_WRITABLE_MASK;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ init_disassembler();
+
+ tep_register_event_handler(tep, -1, "kvm", "kvm_exit",
+ kvm_exit_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kvm", "kvm_entry",
+ kvm_entry_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kvm", "kvm_emulate_insn",
+ kvm_emulate_insn_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kvm", "kvm_nested_vmexit",
+ kvm_nested_vmexit_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kvm", "kvm_nested_vmexit_inject",
+ kvm_nested_vmexit_inject_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kvmmmu", "kvm_mmu_get_page",
+ kvm_mmu_get_page_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "kvmmmu", "kvm_mmu_sync_page",
+ kvm_mmu_print_role, NULL);
+
+ tep_register_event_handler(tep, -1,
+ "kvmmmu", "kvm_mmu_unsync_page",
+ kvm_mmu_print_role, NULL);
+
+ tep_register_event_handler(tep, -1, "kvmmmu", "kvm_mmu_zap_page",
+ kvm_mmu_print_role, NULL);
+
+ tep_register_event_handler(tep, -1, "kvmmmu",
+ "kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
+ NULL);
+
+ tep_register_print_function(tep,
+ process_is_writable_pte,
+ TEP_FUNC_ARG_INT,
+ "is_writable_pte",
+ TEP_FUNC_ARG_LONG,
+ TEP_FUNC_ARG_VOID);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1, "kvm", "kvm_exit",
+ kvm_exit_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvm", "kvm_entry",
+ kvm_entry_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvm", "kvm_emulate_insn",
+ kvm_emulate_insn_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvm", "kvm_nested_vmexit",
+ kvm_nested_vmexit_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvm", "kvm_nested_vmexit_inject",
+ kvm_nested_vmexit_inject_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvmmmu", "kvm_mmu_get_page",
+ kvm_mmu_get_page_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvmmmu", "kvm_mmu_sync_page",
+ kvm_mmu_print_role, NULL);
+
+ tep_unregister_event_handler(tep, -1,
+ "kvmmmu", "kvm_mmu_unsync_page",
+ kvm_mmu_print_role, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvmmmu", "kvm_mmu_zap_page",
+ kvm_mmu_print_role, NULL);
+
+ tep_unregister_event_handler(tep, -1, "kvmmmu",
+ "kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
+ NULL);
+
+ tep_unregister_print_function(tep, process_is_writable_pte,
+ "is_writable_pte");
+}
diff --git a/plugins/plugin_mac80211.c b/plugins/plugin_mac80211.c
new file mode 100644
index 0000000..f48071e
--- /dev/null
+++ b/plugins/plugin_mac80211.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+#define INDENT 65
+
+static void print_string(struct trace_seq *s, struct tep_event *event,
+ const char *name, const void *data)
+{
+ struct tep_format_field *f = tep_find_field(event, name);
+ int offset;
+ int length;
+
+ if (!f) {
+ trace_seq_printf(s, "NOTFOUND:%s", name);
+ return;
+ }
+
+ offset = f->offset;
+ length = f->size;
+
+ if (!strncmp(f->type, "__data_loc", 10)) {
+ unsigned long long v;
+ if (tep_read_number_field(f, data, &v)) {
+ trace_seq_printf(s, "invalid_data_loc");
+ return;
+ }
+ offset = v & 0xffff;
+ length = v >> 16;
+ }
+
+ trace_seq_printf(s, "%.*s", length, (char *)data + offset);
+}
+
+#define SF(fn) tep_print_num_field(s, fn ":%d", event, fn, record, 0)
+#define SFX(fn) tep_print_num_field(s, fn ":%#x", event, fn, record, 0)
+#define SP() trace_seq_putc(s, ' ')
+
+static int drv_bss_info_changed(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ void *data = record->data;
+
+ print_string(s, event, "wiphy_name", data);
+ trace_seq_printf(s, " vif:");
+ print_string(s, event, "vif_name", data);
+ tep_print_num_field(s, "(%d)", event, "vif_type", record, 1);
+
+ trace_seq_printf(s, "\n%*s", INDENT, "");
+ SF("assoc"); SP();
+ SF("aid"); SP();
+ SF("cts"); SP();
+ SF("shortpre"); SP();
+ SF("shortslot"); SP();
+ SF("dtimper"); SP();
+ trace_seq_printf(s, "\n%*s", INDENT, "");
+ SF("bcnint"); SP();
+ SFX("assoc_cap"); SP();
+ SFX("basic_rates"); SP();
+ SF("enable_beacon");
+ trace_seq_printf(s, "\n%*s", INDENT, "");
+ SF("ht_operation_mode");
+
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1, "mac80211",
+ "drv_bss_info_changed",
+ drv_bss_info_changed, NULL);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1, "mac80211",
+ "drv_bss_info_changed",
+ drv_bss_info_changed, NULL);
+}
diff --git a/plugins/plugin_sched_switch.c b/plugins/plugin_sched_switch.c
new file mode 100644
index 0000000..8752cae
--- /dev/null
+++ b/plugins/plugin_sched_switch.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+static void write_state(struct trace_seq *s, int val)
+{
+ const char states[] = "SDTtZXxW";
+ int found = 0;
+ int i;
+
+ for (i = 0; i < (sizeof(states) - 1); i++) {
+ if (!(val & (1 << i)))
+ continue;
+
+ if (found)
+ trace_seq_putc(s, '|');
+
+ found = 1;
+ trace_seq_putc(s, states[i]);
+ }
+
+ if (!found)
+ trace_seq_putc(s, 'R');
+}
+
+static void write_and_save_comm(struct tep_format_field *field,
+ struct tep_record *record,
+ struct trace_seq *s, int pid)
+{
+ const char *comm;
+ int len;
+
+ comm = (char *)(record->data + field->offset);
+ len = s->len;
+ trace_seq_printf(s, "%.*s",
+ field->size, comm);
+
+ /* make sure the comm has a \0 at the end. */
+ trace_seq_terminate(s);
+ comm = &s->buffer[len];
+
+ /* Help out the comm to ids. This will handle dups */
+ tep_register_comm(field->event->tep, comm, pid);
+}
+
+static int sched_wakeup_handler(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_format_field *field;
+ unsigned long long val;
+
+ if (tep_get_field_val(s, event, "pid", record, &val, 1))
+ return trace_seq_putc(s, '!');
+
+ field = tep_find_any_field(event, "comm");
+ if (field) {
+ write_and_save_comm(field, record, s, val);
+ trace_seq_putc(s, ':');
+ }
+ trace_seq_printf(s, "%lld", val);
+
+ if (tep_get_field_val(s, event, "prio", record, &val, 1) == 0)
+ trace_seq_printf(s, " [%lld]", val);
+
+ if (tep_get_field_val(s, event, "success", record, &val, 0) == 0)
+ trace_seq_printf(s, " success=%lld", val);
+
+ if (tep_get_field_val(s, event, "target_cpu", record, &val, 0) == 0)
+ trace_seq_printf(s, " CPU:%03llu", val);
+
+ return 0;
+}
+
+static int sched_switch_handler(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct tep_format_field *field;
+ unsigned long long val;
+
+ if (tep_get_field_val(s, event, "prev_pid", record, &val, 1))
+ return trace_seq_putc(s, '!');
+
+ field = tep_find_any_field(event, "prev_comm");
+ if (field) {
+ write_and_save_comm(field, record, s, val);
+ trace_seq_putc(s, ':');
+ }
+ trace_seq_printf(s, "%lld ", val);
+
+ if (tep_get_field_val(s, event, "prev_prio", record, &val, 1) == 0)
+ trace_seq_printf(s, "[%d] ", (int) val);
+
+ if (tep_get_field_val(s, event, "prev_state", record, &val, 1) == 0)
+ write_state(s, val);
+
+ trace_seq_puts(s, " ==> ");
+
+ if (tep_get_field_val(s, event, "next_pid", record, &val, 1))
+ return trace_seq_putc(s, '!');
+
+ field = tep_find_any_field(event, "next_comm");
+ if (field) {
+ write_and_save_comm(field, record, s, val);
+ trace_seq_putc(s, ':');
+ }
+ trace_seq_printf(s, "%lld", val);
+
+ if (tep_get_field_val(s, event, "next_prio", record, &val, 1) == 0)
+ trace_seq_printf(s, " [%d]", (int) val);
+
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1, "sched", "sched_switch",
+ sched_switch_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "sched", "sched_wakeup",
+ sched_wakeup_handler, NULL);
+
+ tep_register_event_handler(tep, -1, "sched", "sched_wakeup_new",
+ sched_wakeup_handler, NULL);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1, "sched", "sched_switch",
+ sched_switch_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "sched", "sched_wakeup",
+ sched_wakeup_handler, NULL);
+
+ tep_unregister_event_handler(tep, -1, "sched", "sched_wakeup_new",
+ sched_wakeup_handler, NULL);
+}
diff --git a/plugins/plugin_scsi.c b/plugins/plugin_scsi.c
new file mode 100644
index 0000000..5d0387a
--- /dev/null
+++ b/plugins/plugin_scsi.c
@@ -0,0 +1,434 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include "event-parse.h"
+#include "trace-seq.h"
+
+typedef unsigned long sector_t;
+typedef uint64_t u64;
+typedef unsigned int u32;
+
+/*
+ * SCSI opcodes
+ */
+#define TEST_UNIT_READY 0x00
+#define REZERO_UNIT 0x01
+#define REQUEST_SENSE 0x03
+#define FORMAT_UNIT 0x04
+#define READ_BLOCK_LIMITS 0x05
+#define REASSIGN_BLOCKS 0x07
+#define INITIALIZE_ELEMENT_STATUS 0x07
+#define READ_6 0x08
+#define WRITE_6 0x0a
+#define SEEK_6 0x0b
+#define READ_REVERSE 0x0f
+#define WRITE_FILEMARKS 0x10
+#define SPACE 0x11
+#define INQUIRY 0x12
+#define RECOVER_BUFFERED_DATA 0x14
+#define MODE_SELECT 0x15
+#define RESERVE 0x16
+#define RELEASE 0x17
+#define COPY 0x18
+#define ERASE 0x19
+#define MODE_SENSE 0x1a
+#define START_STOP 0x1b
+#define RECEIVE_DIAGNOSTIC 0x1c
+#define SEND_DIAGNOSTIC 0x1d
+#define ALLOW_MEDIUM_REMOVAL 0x1e
+
+#define READ_FORMAT_CAPACITIES 0x23
+#define SET_WINDOW 0x24
+#define READ_CAPACITY 0x25
+#define READ_10 0x28
+#define WRITE_10 0x2a
+#define SEEK_10 0x2b
+#define POSITION_TO_ELEMENT 0x2b
+#define WRITE_VERIFY 0x2e
+#define VERIFY 0x2f
+#define SEARCH_HIGH 0x30
+#define SEARCH_EQUAL 0x31
+#define SEARCH_LOW 0x32
+#define SET_LIMITS 0x33
+#define PRE_FETCH 0x34
+#define READ_POSITION 0x34
+#define SYNCHRONIZE_CACHE 0x35
+#define LOCK_UNLOCK_CACHE 0x36
+#define READ_DEFECT_DATA 0x37
+#define MEDIUM_SCAN 0x38
+#define COMPARE 0x39
+#define COPY_VERIFY 0x3a
+#define WRITE_BUFFER 0x3b
+#define READ_BUFFER 0x3c
+#define UPDATE_BLOCK 0x3d
+#define READ_LONG 0x3e
+#define WRITE_LONG 0x3f
+#define CHANGE_DEFINITION 0x40
+#define WRITE_SAME 0x41
+#define UNMAP 0x42
+#define READ_TOC 0x43
+#define READ_HEADER 0x44
+#define GET_EVENT_STATUS_NOTIFICATION 0x4a
+#define LOG_SELECT 0x4c
+#define LOG_SENSE 0x4d
+#define XDWRITEREAD_10 0x53
+#define MODE_SELECT_10 0x55
+#define RESERVE_10 0x56
+#define RELEASE_10 0x57
+#define MODE_SENSE_10 0x5a
+#define PERSISTENT_RESERVE_IN 0x5e
+#define PERSISTENT_RESERVE_OUT 0x5f
+#define VARIABLE_LENGTH_CMD 0x7f
+#define REPORT_LUNS 0xa0
+#define SECURITY_PROTOCOL_IN 0xa2
+#define MAINTENANCE_IN 0xa3
+#define MAINTENANCE_OUT 0xa4
+#define MOVE_MEDIUM 0xa5
+#define EXCHANGE_MEDIUM 0xa6
+#define READ_12 0xa8
+#define SERVICE_ACTION_OUT_12 0xa9
+#define WRITE_12 0xaa
+#define SERVICE_ACTION_IN_12 0xab
+#define WRITE_VERIFY_12 0xae
+#define VERIFY_12 0xaf
+#define SEARCH_HIGH_12 0xb0
+#define SEARCH_EQUAL_12 0xb1
+#define SEARCH_LOW_12 0xb2
+#define SECURITY_PROTOCOL_OUT 0xb5
+#define READ_ELEMENT_STATUS 0xb8
+#define SEND_VOLUME_TAG 0xb6
+#define WRITE_LONG_2 0xea
+#define EXTENDED_COPY 0x83
+#define RECEIVE_COPY_RESULTS 0x84
+#define ACCESS_CONTROL_IN 0x86
+#define ACCESS_CONTROL_OUT 0x87
+#define READ_16 0x88
+#define WRITE_16 0x8a
+#define READ_ATTRIBUTE 0x8c
+#define WRITE_ATTRIBUTE 0x8d
+#define VERIFY_16 0x8f
+#define SYNCHRONIZE_CACHE_16 0x91
+#define WRITE_SAME_16 0x93
+#define SERVICE_ACTION_BIDIRECTIONAL 0x9d
+#define SERVICE_ACTION_IN_16 0x9e
+#define SERVICE_ACTION_OUT_16 0x9f
+/* values for service action in */
+#define SAI_READ_CAPACITY_16 0x10
+#define SAI_GET_LBA_STATUS 0x12
+/* values for VARIABLE_LENGTH_CMD service action codes
+ * see spc4r17 Section D.3.5, table D.7 and D.8 */
+#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
+/* values for maintenance in */
+#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
+#define MI_REPORT_TARGET_PGS 0x0a
+#define MI_REPORT_ALIASES 0x0b
+#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
+#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
+#define MI_REPORT_PRIORITY 0x0e
+#define MI_REPORT_TIMESTAMP 0x0f
+#define MI_MANAGEMENT_PROTOCOL_IN 0x10
+/* value for MI_REPORT_TARGET_PGS ext header */
+#define MI_EXT_HDR_PARAM_FMT 0x20
+/* values for maintenance out */
+#define MO_SET_IDENTIFYING_INFORMATION 0x06
+#define MO_SET_TARGET_PGS 0x0a
+#define MO_CHANGE_ALIASES 0x0b
+#define MO_SET_PRIORITY 0x0e
+#define MO_SET_TIMESTAMP 0x0f
+#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
+/* values for variable length command */
+#define XDREAD_32 0x03
+#define XDWRITE_32 0x04
+#define XPWRITE_32 0x06
+#define XDWRITEREAD_32 0x07
+#define READ_32 0x09
+#define VERIFY_32 0x0a
+#define WRITE_32 0x0b
+#define WRITE_SAME_32 0x0d
+
+#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
+#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9])
+
+static const char *
+scsi_trace_misc(struct trace_seq *, unsigned char *, int);
+
+static const char *
+scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len;
+ sector_t lba = 0, txlen = 0;
+
+ lba |= ((cdb[1] & 0x1F) << 16);
+ lba |= (cdb[2] << 8);
+ lba |= cdb[3];
+ txlen = cdb[4];
+
+ trace_seq_printf(p, "lba=%llu txlen=%llu",
+ (unsigned long long)lba, (unsigned long long)txlen);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len;
+ sector_t lba = 0, txlen = 0;
+
+ lba |= (cdb[2] << 24);
+ lba |= (cdb[3] << 16);
+ lba |= (cdb[4] << 8);
+ lba |= cdb[5];
+ txlen |= (cdb[7] << 8);
+ txlen |= cdb[8];
+
+ trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
+ (unsigned long long)lba, (unsigned long long)txlen,
+ cdb[1] >> 5);
+
+ if (cdb[0] == WRITE_SAME)
+ trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
+
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len;
+ sector_t lba = 0, txlen = 0;
+
+ lba |= (cdb[2] << 24);
+ lba |= (cdb[3] << 16);
+ lba |= (cdb[4] << 8);
+ lba |= cdb[5];
+ txlen |= (cdb[6] << 24);
+ txlen |= (cdb[7] << 16);
+ txlen |= (cdb[8] << 8);
+ txlen |= cdb[9];
+
+ trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
+ (unsigned long long)lba, (unsigned long long)txlen,
+ cdb[1] >> 5);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len;
+ sector_t lba = 0, txlen = 0;
+
+ lba |= ((u64)cdb[2] << 56);
+ lba |= ((u64)cdb[3] << 48);
+ lba |= ((u64)cdb[4] << 40);
+ lba |= ((u64)cdb[5] << 32);
+ lba |= (cdb[6] << 24);
+ lba |= (cdb[7] << 16);
+ lba |= (cdb[8] << 8);
+ lba |= cdb[9];
+ txlen |= (cdb[10] << 24);
+ txlen |= (cdb[11] << 16);
+ txlen |= (cdb[12] << 8);
+ txlen |= cdb[13];
+
+ trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
+ (unsigned long long)lba, (unsigned long long)txlen,
+ cdb[1] >> 5);
+
+ if (cdb[0] == WRITE_SAME_16)
+ trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
+
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len, *cmd;
+ sector_t lba = 0, txlen = 0;
+ u32 ei_lbrt = 0;
+
+ switch (SERVICE_ACTION32(cdb)) {
+ case READ_32:
+ cmd = "READ";
+ break;
+ case VERIFY_32:
+ cmd = "VERIFY";
+ break;
+ case WRITE_32:
+ cmd = "WRITE";
+ break;
+ case WRITE_SAME_32:
+ cmd = "WRITE_SAME";
+ break;
+ default:
+ trace_seq_printf(p, "UNKNOWN");
+ goto out;
+ }
+
+ lba |= ((u64)cdb[12] << 56);
+ lba |= ((u64)cdb[13] << 48);
+ lba |= ((u64)cdb[14] << 40);
+ lba |= ((u64)cdb[15] << 32);
+ lba |= (cdb[16] << 24);
+ lba |= (cdb[17] << 16);
+ lba |= (cdb[18] << 8);
+ lba |= cdb[19];
+ ei_lbrt |= (cdb[20] << 24);
+ ei_lbrt |= (cdb[21] << 16);
+ ei_lbrt |= (cdb[22] << 8);
+ ei_lbrt |= cdb[23];
+ txlen |= (cdb[28] << 24);
+ txlen |= (cdb[29] << 16);
+ txlen |= (cdb[30] << 8);
+ txlen |= cdb[31];
+
+ trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
+ cmd, (unsigned long long)lba,
+ (unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);
+
+ if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
+ trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
+
+out:
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len;
+ unsigned int regions = cdb[7] << 8 | cdb[8];
+
+ trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len, *cmd;
+ sector_t lba = 0;
+ u32 alloc_len = 0;
+
+ switch (SERVICE_ACTION16(cdb)) {
+ case SAI_READ_CAPACITY_16:
+ cmd = "READ_CAPACITY_16";
+ break;
+ case SAI_GET_LBA_STATUS:
+ cmd = "GET_LBA_STATUS";
+ break;
+ default:
+ trace_seq_printf(p, "UNKNOWN");
+ goto out;
+ }
+
+ lba |= ((u64)cdb[2] << 56);
+ lba |= ((u64)cdb[3] << 48);
+ lba |= ((u64)cdb[4] << 40);
+ lba |= ((u64)cdb[5] << 32);
+ lba |= (cdb[6] << 24);
+ lba |= (cdb[7] << 16);
+ lba |= (cdb[8] << 8);
+ lba |= cdb[9];
+ alloc_len |= (cdb[10] << 24);
+ alloc_len |= (cdb[11] << 16);
+ alloc_len |= (cdb[12] << 8);
+ alloc_len |= cdb[13];
+
+ trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
+ (unsigned long long)lba, alloc_len);
+
+out:
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+static const char *
+scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ switch (SERVICE_ACTION32(cdb)) {
+ case READ_32:
+ case VERIFY_32:
+ case WRITE_32:
+ case WRITE_SAME_32:
+ return scsi_trace_rw32(p, cdb, len);
+ default:
+ return scsi_trace_misc(p, cdb, len);
+ }
+}
+
+static const char *
+scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = p->buffer + p->len;
+
+ trace_seq_printf(p, "-");
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+const char *
+scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ switch (cdb[0]) {
+ case READ_6:
+ case WRITE_6:
+ return scsi_trace_rw6(p, cdb, len);
+ case READ_10:
+ case VERIFY:
+ case WRITE_10:
+ case WRITE_SAME:
+ return scsi_trace_rw10(p, cdb, len);
+ case READ_12:
+ case VERIFY_12:
+ case WRITE_12:
+ return scsi_trace_rw12(p, cdb, len);
+ case READ_16:
+ case VERIFY_16:
+ case WRITE_16:
+ case WRITE_SAME_16:
+ return scsi_trace_rw16(p, cdb, len);
+ case UNMAP:
+ return scsi_trace_unmap(p, cdb, len);
+ case SERVICE_ACTION_IN_16:
+ return scsi_trace_service_action_in(p, cdb, len);
+ case VARIABLE_LENGTH_CMD:
+ return scsi_trace_varlen(p, cdb, len);
+ default:
+ return scsi_trace_misc(p, cdb, len);
+ }
+}
+
+unsigned long long process_scsi_trace_parse_cdb(struct trace_seq *s,
+ unsigned long long *args)
+{
+ scsi_trace_parse_cdb(s, (unsigned char *) (unsigned long) args[1], args[2]);
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_print_function(tep,
+ process_scsi_trace_parse_cdb,
+ TEP_FUNC_ARG_STRING,
+ "scsi_trace_parse_cdb",
+ TEP_FUNC_ARG_PTR,
+ TEP_FUNC_ARG_PTR,
+ TEP_FUNC_ARG_INT,
+ TEP_FUNC_ARG_VOID);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_print_function(tep, process_scsi_trace_parse_cdb,
+ "scsi_trace_parse_cdb");
+}
diff --git a/plugins/plugin_tlb.c b/plugins/plugin_tlb.c
new file mode 100644
index 0000000..43657fb
--- /dev/null
+++ b/plugins/plugin_tlb.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2015 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "event-parse.h"
+
+enum tlb_flush_reason {
+ TLB_FLUSH_ON_TASK_SWITCH,
+ TLB_REMOTE_SHOOTDOWN,
+ TLB_LOCAL_SHOOTDOWN,
+ TLB_LOCAL_MM_SHOOTDOWN,
+ NR_TLB_FLUSH_REASONS,
+};
+
+static int tlb_flush_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ unsigned long long val;
+
+ trace_seq_printf(s, "pages=");
+
+ tep_print_num_field(s, "%ld", event, "pages", record, 1);
+
+ if (tep_get_field_val(s, event, "reason", record, &val, 1) < 0)
+ return -1;
+
+ trace_seq_puts(s, " reason=");
+
+ switch (val) {
+ case TLB_FLUSH_ON_TASK_SWITCH:
+ trace_seq_puts(s, "flush on task switch");
+ break;
+ case TLB_REMOTE_SHOOTDOWN:
+ trace_seq_puts(s, "remote shootdown");
+ break;
+ case TLB_LOCAL_SHOOTDOWN:
+ trace_seq_puts(s, "local shootdown");
+ break;
+ case TLB_LOCAL_MM_SHOOTDOWN:
+ trace_seq_puts(s, "local mm shootdown");
+ break;
+ }
+
+ trace_seq_printf(s, " (%lld)", val);
+
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_event_handler(tep, -1, "tlb", "tlb_flush",
+ tlb_flush_handler, NULL);
+
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_event_handler(tep, -1,
+ "tlb", "tlb_flush",
+ tlb_flush_handler, NULL);
+}
diff --git a/plugins/plugin_xen.c b/plugins/plugin_xen.c
new file mode 100644
index 0000000..993b208
--- /dev/null
+++ b/plugins/plugin_xen.c
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "event-parse.h"
+#include "trace-seq.h"
+
+#define __HYPERVISOR_set_trap_table 0
+#define __HYPERVISOR_mmu_update 1
+#define __HYPERVISOR_set_gdt 2
+#define __HYPERVISOR_stack_switch 3
+#define __HYPERVISOR_set_callbacks 4
+#define __HYPERVISOR_fpu_taskswitch 5
+#define __HYPERVISOR_sched_op_compat 6
+#define __HYPERVISOR_dom0_op 7
+#define __HYPERVISOR_set_debugreg 8
+#define __HYPERVISOR_get_debugreg 9
+#define __HYPERVISOR_update_descriptor 10
+#define __HYPERVISOR_memory_op 12
+#define __HYPERVISOR_multicall 13
+#define __HYPERVISOR_update_va_mapping 14
+#define __HYPERVISOR_set_timer_op 15
+#define __HYPERVISOR_event_channel_op_compat 16
+#define __HYPERVISOR_xen_version 17
+#define __HYPERVISOR_console_io 18
+#define __HYPERVISOR_physdev_op_compat 19
+#define __HYPERVISOR_grant_table_op 20
+#define __HYPERVISOR_vm_assist 21
+#define __HYPERVISOR_update_va_mapping_otherdomain 22
+#define __HYPERVISOR_iret 23 /* x86 only */
+#define __HYPERVISOR_vcpu_op 24
+#define __HYPERVISOR_set_segment_base 25 /* x86/64 only */
+#define __HYPERVISOR_mmuext_op 26
+#define __HYPERVISOR_acm_op 27
+#define __HYPERVISOR_nmi_op 28
+#define __HYPERVISOR_sched_op 29
+#define __HYPERVISOR_callback_op 30
+#define __HYPERVISOR_xenoprof_op 31
+#define __HYPERVISOR_event_channel_op 32
+#define __HYPERVISOR_physdev_op 33
+#define __HYPERVISOR_hvm_op 34
+#define __HYPERVISOR_tmem_op 38
+
+/* Architecture-specific hypercall definitions. */
+#define __HYPERVISOR_arch_0 48
+#define __HYPERVISOR_arch_1 49
+#define __HYPERVISOR_arch_2 50
+#define __HYPERVISOR_arch_3 51
+#define __HYPERVISOR_arch_4 52
+#define __HYPERVISOR_arch_5 53
+#define __HYPERVISOR_arch_6 54
+#define __HYPERVISOR_arch_7 55
+
+#define N(x) [__HYPERVISOR_##x] = "("#x")"
+static const char *xen_hypercall_names[] = {
+ N(set_trap_table),
+ N(mmu_update),
+ N(set_gdt),
+ N(stack_switch),
+ N(set_callbacks),
+ N(fpu_taskswitch),
+ N(sched_op_compat),
+ N(dom0_op),
+ N(set_debugreg),
+ N(get_debugreg),
+ N(update_descriptor),
+ N(memory_op),
+ N(multicall),
+ N(update_va_mapping),
+ N(set_timer_op),
+ N(event_channel_op_compat),
+ N(xen_version),
+ N(console_io),
+ N(physdev_op_compat),
+ N(grant_table_op),
+ N(vm_assist),
+ N(update_va_mapping_otherdomain),
+ N(iret),
+ N(vcpu_op),
+ N(set_segment_base),
+ N(mmuext_op),
+ N(acm_op),
+ N(nmi_op),
+ N(sched_op),
+ N(callback_op),
+ N(xenoprof_op),
+ N(event_channel_op),
+ N(physdev_op),
+ N(hvm_op),
+
+/* Architecture-specific hypercall definitions. */
+ N(arch_0),
+ N(arch_1),
+ N(arch_2),
+ N(arch_3),
+ N(arch_4),
+ N(arch_5),
+ N(arch_6),
+ N(arch_7),
+};
+#undef N
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+static const char *xen_hypercall_name(unsigned op)
+{
+ if (op < ARRAY_SIZE(xen_hypercall_names) &&
+ xen_hypercall_names[op] != NULL)
+ return xen_hypercall_names[op];
+
+ return "";
+}
+
+unsigned long long process_xen_hypercall_name(struct trace_seq *s,
+ unsigned long long *args)
+{
+ unsigned int op = args[0];
+
+ trace_seq_printf(s, "%s", xen_hypercall_name(op));
+ return 0;
+}
+
+int TEP_PLUGIN_LOADER(struct tep_handle *tep)
+{
+ tep_register_print_function(tep,
+ process_xen_hypercall_name,
+ TEP_FUNC_ARG_STRING,
+ "xen_hypercall_name",
+ TEP_FUNC_ARG_INT,
+ TEP_FUNC_ARG_VOID);
+ return 0;
+}
+
+void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
+{
+ tep_unregister_print_function(tep, process_xen_hypercall_name,
+ "xen_hypercall_name");
+}
diff --git a/samples/Makefile b/samples/Makefile
new file mode 100644
index 0000000..2962611
--- /dev/null
+++ b/samples/Makefile
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: LGPL-2.1
+
+include $(src)/scripts/utils.mk
+
+TARGETS :=
+TARGETS += test-event
+
+sdir := $(obj)/samples
+
+TARGETS := $(patsubst %,$(sdir)/%,$(TARGETS))
+
+all: $(TARGETS)
+
+$(sdir):
+ @mkdir -p $(sdir)
+
+$(TARGETS): $(sdir) $(LIBTRACEEVENT_STATIC)
+
+$(sdir)/%: $(bdir)/%.o
+ $(call do_sample_build,$@,$<)
+
+$(bdir)/%.o: $(bdir)/%.c
+ $(Q)$(CC) -o $@ -c $< $(CFLAGS) $(INCLUDES)
+
+clean:
+ $(Q)$(call do_clean,$(sdir)/*)
diff --git a/samples/test-event.c b/samples/test-event.c
new file mode 100644
index 0000000..b25da1e
--- /dev/null
+++ b/samples/test-event.c
@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2022 Google Inc, Steven Rostedt <rostedt@goodmis.org>
+ */
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <getopt.h>
+#include <event-parse.h>
+
+static char *argv0;
+
+static char *get_this_name(void)
+{
+ static char *this_name;
+ char *arg;
+ char *p;
+
+ if (this_name)
+ return this_name;
+
+ arg = argv0;
+ p = arg+strlen(arg);
+
+ while (p >= arg && *p != '/')
+ p--;
+ p++;
+
+ this_name = p;
+ return p;
+}
+
+static void usage(void)
+{
+ char *p = get_this_name();
+
+ printf("usage: %s [options]\n"
+ " -h : this message\n"
+ " -s system : the system for the event\n"
+ " -e format : the event format file\n"
+ " -f file : file to read the event from\n"
+ " otherwise, reads from stdin\n"
+ "\n",p);
+ exit(-1);
+}
+
+static void __vdie(const char *fmt, va_list ap, int err)
+{
+ int ret = errno;
+ char *p = get_this_name();
+
+ if (err && errno)
+ perror(p);
+ else
+ ret = -1;
+
+ fprintf(stderr, " ");
+ vfprintf(stderr, fmt, ap);
+
+ fprintf(stderr, "\n");
+ exit(ret);
+}
+
+void die(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ __vdie(fmt, ap, 0);
+ va_end(ap);
+}
+
+void pdie(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ __vdie(fmt, ap, 1);
+ va_end(ap);
+}
+
+/* Must be a power of two */
+#define BUFALLOC 1024
+#define BUFMASK (~(BUFALLOC - 1))
+
+int main(int argc, char **argv)
+{
+ struct tep_handle *tep;
+ struct tep_event *event;
+ FILE *file = stdin;
+ FILE *fp = NULL;
+ char *system = NULL;
+ char *event_buf = NULL;
+ int esize = 0;
+ int c;
+
+ argv0 = argv[0];
+
+ while ((c = getopt(argc, argv, "hs:e:f:")) >= 0) {
+ switch (c) {
+ case 's':
+ system = optarg;
+ break;
+ case 'e':
+ event_buf = optarg;
+ file = NULL;
+ break;
+ case 'f':
+ fp = fopen(optarg, "r");
+ if (!fp)
+ pdie("%s", optarg);
+ file = fp;
+ break;
+ case 'h':
+ usage();
+ }
+ }
+ if (file) {
+ char *line = NULL;
+ size_t n = 0;
+ int len;
+
+ while (getline(&line, &n, file) > 0) {
+ len = strlen(line) + 1;
+
+ if (((esize - 1) & BUFMASK) < ((esize + len) & BUFMASK)) {
+ int a;
+
+ a = (esize + len + BUFALLOC - 1) & BUFMASK;
+ event_buf = realloc(event_buf, a);
+ if (!event_buf)
+ pdie("allocating event");
+ }
+ strcpy(event_buf + esize, line);
+ esize += len - 1;
+ }
+ free(line);
+ }
+
+ tep = tep_alloc();
+ if (!tep)
+ pdie("Allocating tep handle");
+
+ tep_set_loglevel(TEP_LOG_ALL);
+
+ if (!system)
+ system = "test";
+
+ if (tep_parse_format(tep, &event, event_buf, esize, system))
+ die("Failed to parse event");
+
+}
diff --git a/scripts/features.mk b/scripts/features.mk
new file mode 100644
index 0000000..9c7f8c3
--- /dev/null
+++ b/scripts/features.mk
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# taken from perf which was based on Linux Kbuild
+# try-cc
+# Usage: option = $(call try-cc, source-to-build, cc-options)
+try-cc = $(shell sh -c \
+ 'TMP="$(BUILD_OUTPUT)$(TMPOUT).$$$$"; \
+ echo "$(1)" | \
+ $(CC) -x c - $(2) -o "$$TMP" > /dev/null 2>&1 && echo y; \
+ rm -f "$$TMP"')
+
+define SOURCE_PTRACE
+#include <stdio.h>
+#include <sys/ptrace.h>
+
+int main (void)
+{
+ int ret;
+ ret = ptrace(PTRACE_ATTACH, 0, NULL, 0);
+ ptrace(PTRACE_TRACEME, 0, NULL, 0);
+ ptrace(PTRACE_GETSIGINFO, 0, NULL, NULL);
+ ptrace(PTRACE_GETEVENTMSG, 0, NULL, NULL);
+ ptrace(PTRACE_SETOPTIONS, NULL, NULL,
+ PTRACE_O_TRACEFORK |
+ PTRACE_O_TRACEVFORK |
+ PTRACE_O_TRACECLONE |
+ PTRACE_O_TRACEEXIT);
+ ptrace(PTRACE_CONT, NULL, NULL, 0);
+ ptrace(PTRACE_DETACH, 0, NULL, NULL);
+ ptrace(PTRACE_SETOPTIONS, 0, NULL,
+ PTRACE_O_TRACEFORK |
+ PTRACE_O_TRACEVFORK |
+ PTRACE_O_TRACECLONE |
+ PTRACE_O_TRACEEXIT);
+ return ret;
+}
+endef
diff --git a/scripts/utilities.mak b/scripts/utilities.mak
new file mode 100644
index 0000000..4852b55
--- /dev/null
+++ b/scripts/utilities.mak
@@ -0,0 +1,180 @@
+# SPDX-License-Identifier: GPL-2.0
+# This allows us to work with the newline character:
+define newline
+
+
+endef
+newline := $(newline)
+
+# nl-escape
+#
+# Usage: escape = $(call nl-escape[,escape])
+#
+# This is used as the common way to specify
+# what should replace a newline when escaping
+# newlines; the default is a bizarre string.
+#
+nl-escape = $(if $(1),$(1),m822df3020w6a44id34bt574ctac44eb9f4n)
+
+# escape-nl
+#
+# Usage: escaped-text = $(call escape-nl,text[,escape])
+#
+# GNU make's $(shell ...) function converts to a
+# single space each newline character in the output
+# produced during the expansion; this may not be
+# desirable.
+#
+# The only solution is to change each newline into
+# something that won't be converted, so that the
+# information can be recovered later with
+# $(call unescape-nl...)
+#
+escape-nl = $(subst $(newline),$(call nl-escape,$(2)),$(1))
+
+# unescape-nl
+#
+# Usage: text = $(call unescape-nl,escaped-text[,escape])
+#
+# See escape-nl.
+#
+unescape-nl = $(subst $(call nl-escape,$(2)),$(newline),$(1))
+
+# shell-escape-nl
+#
+# Usage: $(shell some-command | $(call shell-escape-nl[,escape]))
+#
+# Use this to escape newlines from within a shell call;
+# the default escape is a bizarre string.
+#
+# NOTE: The escape is used directly as a string constant
+# in an `awk' program that is delimited by shell
+# single-quotes, so be wary of the characters
+# that are chosen.
+#
+define shell-escape-nl
+awk 'NR==1 {t=$$0} NR>1 {t=t "$(nl-escape)" $$0} END {printf t}'
+endef
+
+# shell-unescape-nl
+#
+# Usage: $(shell some-command | $(call shell-unescape-nl[,escape]))
+#
+# Use this to unescape newlines from within a shell call;
+# the default escape is a bizarre string.
+#
+# NOTE: The escape is used directly as an extended regular
+# expression constant in an `awk' program that is
+# delimited by shell single-quotes, so be wary
+# of the characters that are chosen.
+#
+# (The bash shell has a bug where `{gsub(...),...}' is
+# misinterpreted as a brace expansion; this can be
+# overcome by putting a space between `{' and `gsub').
+#
+define shell-unescape-nl
+awk 'NR==1 {t=$$0} NR>1 {t=t "\n" $$0} END { gsub(/$(nl-escape)/,"\n",t); printf t }'
+endef
+
+# escape-for-shell-sq
+#
+# Usage: embeddable-text = $(call escape-for-shell-sq,text)
+#
+# This function produces text that is suitable for
+# embedding in a shell string that is delimited by
+# single-quotes.
+#
+escape-for-shell-sq = $(subst ','\'',$(1))
+
+# shell-sq
+#
+# Usage: single-quoted-and-escaped-text = $(call shell-sq,text)
+#
+shell-sq = '$(escape-for-shell-sq)'
+
+# shell-wordify
+#
+# Usage: wordified-text = $(call shell-wordify,text)
+#
+# For instance:
+#
+# |define text
+# |hello
+# |world
+# |endef
+# |
+# |target:
+# | echo $(call shell-wordify,$(text))
+#
+# At least GNU make gets confused by expanding a newline
+# within the context of a command line of a makefile rule
+# (this is in constrast to a `$(shell ...)' function call,
+# which can handle it just fine).
+#
+# This function avoids the problem by producing a string
+# that works as a shell word, regardless of whether or
+# not it contains a newline.
+#
+# If the text to be wordified contains a newline, then
+# an intrictate shell command substitution is constructed
+# to render the text as a single line; when the shell
+# processes the resulting escaped text, it transforms
+# it into the original unescaped text.
+#
+# If the text does not contain a newline, then this function
+# produces the same results as the `$(shell-sq)' function.
+#
+shell-wordify = $(if $(findstring $(newline),$(1)),$(_sw-esc-nl),$(shell-sq))
+define _sw-esc-nl
+"$$(echo $(call escape-nl,$(shell-sq),$(2)) | $(call shell-unescape-nl,$(2)))"
+endef
+
+# is-absolute
+#
+# Usage: bool-value = $(call is-absolute,path)
+#
+is-absolute = $(shell echo $(shell-sq) | grep -q ^/ && echo y)
+
+# lookup
+#
+# Usage: absolute-executable-path-or-empty = $(call lookup,path)
+#
+# (It's necessary to use `sh -c' because GNU make messes up by
+# trying too hard and getting things wrong).
+#
+lookup = $(call unescape-nl,$(shell sh -c $(_l-sh)))
+_l-sh = $(call shell-sq,command -v $(shell-sq) | $(call shell-escape-nl,))
+
+# is-executable
+#
+# Usage: bool-value = $(call is-executable,path)
+#
+# (It's necessary to use `sh -c' because GNU make messes up by
+# trying too hard and getting things wrong).
+#
+is-executable = $(call _is-executable-helper,$(shell-sq))
+_is-executable-helper = $(shell sh -c $(_is-executable-sh))
+_is-executable-sh = $(call shell-sq,test -f $(1) -a -x $(1) && echo y)
+
+# get-executable
+#
+# Usage: absolute-executable-path-or-empty = $(call get-executable,path)
+#
+# The goal is to get an absolute path for an executable;
+# the `command -v' is defined by POSIX, but it's not
+# necessarily very portable, so it's only used if
+# relative path resolution is requested, as determined
+# by the presence of a leading `/'.
+#
+get-executable = $(if $(1),$(if $(is-absolute),$(_ge-abspath),$(lookup)))
+_ge-abspath = $(if $(is-executable),$(1))
+
+# get-supplied-or-default-executable
+#
+# Usage: absolute-executable-path-or-empty = $(call get-executable-or-default,variable,default)
+#
+define get-executable-or-default
+$(if $($(1)),$(call _ge_attempt,$($(1)),$(1)),$(call _ge_attempt,$(2)))
+endef
+_ge_attempt = $(if $(get-executable),$(get-executable),$(call _gea_err,$(2)))
+_gea_err = $(if $(1),$(error Please set '$(1)' appropriately))
diff --git a/scripts/utils.mk b/scripts/utils.mk
new file mode 100644
index 0000000..7139088
--- /dev/null
+++ b/scripts/utils.mk
@@ -0,0 +1,182 @@
+# SPDX-License-Identifier: LGPL-2.1
+
+# Utils
+
+ PWD := $(shell /bin/pwd)
+ GOBJ = $(notdir $(strip $@))
+ BASE1 = $(notdir $(strip $1))
+ BASE2 = $(notdir $(strip $2))
+ BASEPWD = $(notdir $(strip $(PWD)))
+
+
+ifeq ($(VERBOSE),1)
+ Q =
+ S =
+else
+ Q = @
+ S = -s
+endif
+
+# Use empty print_* macros if either SILENT or VERBOSE.
+ifeq ($(findstring 1,$(SILENT)$(VERBOSE)),1)
+ print_compile =
+ print_app_build =
+ print_fpic_compile =
+ print_shared_lib_compile =
+ print_plugin_obj_compile =
+ print_plugin_build =
+ print_install =
+ print_uninstall =
+ print_gen =
+ print_update =
+ print_descend =
+ print_clean =
+else
+ print_compile = echo ' COMPILE '$(GOBJ);
+ print_app_build = echo ' BUILD '$(GOBJ);
+ print_fpic_compile = echo ' COMPILE FPIC '$(GOBJ);
+ print_shared_lib_compile = echo ' COMPILE SHARED LIB '$(GOBJ);
+ print_plugin_obj_compile = echo ' COMPILE PLUGIN OBJ '$(GOBJ);
+ print_plugin_build = echo ' BUILD PLUGIN '$(GOBJ);
+ print_static_lib_build = echo ' BUILD STATIC LIB '$(GOBJ);
+ print_install = echo ' INSTALL '$1' to $(DESTDIR_SQ)$2';
+ print_uninstall = echo ' UNINSTALL $(DESTDIR_SQ)$1';
+ print_gen = echo ' GEN '$(GOBJ);
+ print_update = echo ' UPDATE '$(GOBJ);
+ print_descend = echo ' DESCEND '$(BASE1) $(BASE2);
+ print_clean = echo ' CLEAN '$(BASEPWD);
+endif
+
+do_fpic_compile = \
+ ($(print_fpic_compile) \
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) $(EXT) -fPIC $< -o $@)
+
+do_compile = \
+ ($(if $(GENERATE_PIC), $(do_fpic_compile), \
+ $(print_compile) \
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) $(EXT) $< -o $@))
+
+do_app_build = \
+ ($(print_app_build) \
+ $(CC) $^ -rdynamic -o $@ $(LDFLAGS) $(CONFIG_LIBS) $(LIBS))
+
+do_build_static_lib = \
+ ($(print_static_lib_build) \
+ if [ -f $@ ]; then \
+ mv $@ $@.rm; $(RM) $@.rm; \
+ fi; \
+ $(AR) rcs $@ $^)
+
+do_compile_shared_library = \
+ ($(print_shared_lib_compile) \
+ $(CC) --shared $^ '-Wl,-soname,$(1),-rpath=$$ORIGIN' -o $@ $(LDFLAGS) $(LIBS))
+
+do_compile_plugin_obj = \
+ ($(print_plugin_obj_compile) \
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) -fPIC -o $@ $<)
+
+do_plugin_build = \
+ ($(print_plugin_build) \
+ $(CC) $(CFLAGS) $(LDFLAGS) -shared -nostartfiles -o $@ $<)
+
+do_compile_python_plugin_obj = \
+ ($(print_plugin_obj_compile) \
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) $(PYTHON_DIR_SQ) $(PYTHON_INCLUDES) -fPIC -o $@ $<)
+
+do_python_plugin_build = \
+ ($(print_plugin_build) \
+ $(CC) $< -shared $(LDFLAGS) $(PYTHON_LDFLAGS) -o $@)
+
+do_clean = \
+ ($(print_clean) \
+ $(RM) $1)
+
+do_sample_build = \
+ $(Q)($(print_sample_build) \
+ $(CC) -o $1 $2 $(CFLAGS) $(LIBTRACEEVENT_STATIC) -ldl)
+
+do_sample_obj = \
+ $(Q)($(print_sample_obj) \
+ $(CC) -g -Wall -c $(CFLAGS) -o $1 $2 -I../include/)
+
+#
+# Define a callable command for descending to a new directory
+#
+# Call by doing: $(call descend,directory[,target])
+#
+descend = \
+ ($(print_descend) \
+ mkdir -p $(obj)/$(BASE1); \
+ $(MAKE) $(PRINT_DIR) bdir=$(obj)/$(BASE1) -C $(1) $(2))
+
+descend_clean = \
+ $(MAKE) $(PRINT_DIR) bdir=$(obj)/$(BASE1) -C $(1) clean
+
+define make_version.h
+ (echo '/* This file is automatically generated. Do not modify. */'; \
+ echo \#define VERSION_CODE $(shell \
+ expr $(VERSION) \* 256 + $(PATCHLEVEL)); \
+ echo '#define EXTRAVERSION ' $(EXTRAVERSION); \
+ echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"'; \
+ echo '#define FILE_VERSION '$(FILE_VERSION); \
+ if [ -d $(src)/.git ]; then \
+ d=`git diff`; \
+ x=""; \
+ if [ ! -z "$$d" ]; then x="+"; fi; \
+ echo '#define VERSION_GIT "'$(shell \
+ git log -1 --pretty=format:"%H" 2>/dev/null)$$x'"'; \
+ else \
+ echo '#define VERSION_GIT "not-a-git-repo"'; \
+ fi \
+ ) > $1
+endef
+
+define update_version.h
+ ($(call make_version.h, $@.tmp); \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ $(print_update) \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+define update_dir
+ (echo $1 > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ $(print_update) \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+define build_prefix
+ (echo $1 > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ $(print_update) \
+ mv -f $@.tmp $@; \
+ fi);
+endef
+
+define do_install_mkdir
+ if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
+ $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
+ fi
+endef
+
+define do_install
+ $(print_install) \
+ $(call do_install_mkdir,$2); \
+ $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
+endef
+
+define do_install_pkgconfig_file
+ if [ -n "${pkgconfig_dir}" ]; then \
+ $(call do_install,$(PKG_CONFIG_FILE),$(pkgconfig_dir),644); \
+ else \
+ (echo Failed to locate pkg-config directory) 1>&2; \
+ fi
+endef
diff --git a/src/Build b/src/Build
new file mode 100644
index 0000000..f9a5d79
--- /dev/null
+++ b/src/Build
@@ -0,0 +1,8 @@
+libtraceevent-y += event-parse.o
+libtraceevent-y += event-plugin.o
+libtraceevent-y += trace-seq.o
+libtraceevent-y += parse-filter.o
+libtraceevent-y += parse-utils.o
+libtraceevent-y += kbuffer-parse.o
+libtraceevent-y += tep_strerror.o
+libtraceevent-y += event-parse-api.o
diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..53bb570
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: LGPL-2.1
+
+include $(src)/scripts/utils.mk
+
+OBJS =
+OBJS += event-parse-api.o
+OBJS += event-parse.o
+OBJS += event-plugin.o
+OBJS += kbuffer-parse.o
+OBJS += parse-filter.o
+OBJS += parse-utils.o
+OBJS += tep_strerror.o
+OBJS += trace-seq.o
+
+OBJS := $(OBJS:%.o=$(bdir)/%.o)
+DEPS := $(OBJS:$(bdir)/%.o=$(bdir)/.%.d)
+
+$(bdir)/%.o: %.c
+ $(Q)$(call do_fpic_compile)
+
+$(LIBTRACEEVENT_STATIC): $(OBJS)
+ $(Q)$(call do_build_static_lib)
+
+$(LIBTRACEEVENT_SHARED): $(OBJS)
+ $(Q)$(call do_compile_shared_library,$(notdir $(LIBTRACEEVENT_SHARED_VERSION)))
+
+$(LIBTRACEEVENT_SHARED_VERSION): $(LIBTRACEEVENT_SHARED)
+ @ln -sf $(<F) $@
+
+$(LIBTRACEEVENT_SHARED_SO): $(LIBTRACEEVENT_SHARED_VERSION)
+ @ln -sf $(<F) $@
+
+libtraceevent.so: $(LIBTRACEEVENT_SHARED_SO)
+
+libtraceevent: $(libtraceevent-y)
+ $(Q)$(MAKE) $(build)=libtraceevent
+
+$(DEPS): $(bdir)/.%.d: %.c
+ $(Q)$(CC) -M -MT $(bdir)/$*.o $(CPPFLAGS) $(CFLAGS) $< > $@
+
+$(OBJS): $(bdir)/%.o : $(bdir)/.%.d
+
+$(OBJS): | $(bdir)
+$(DEPS): | $(bdir)
+
+clean:
+ $(Q)$(call do_clean,$(OBJS) $(DEPS))
+
+dep_includes := $(wildcard $(DEPS))
+
+ifneq ($(dep_includes),)
+ include $(dep_includes)
+endif
+
+.PHONY: $(LIBTRACEEVENT_SHARED_SO) $(LIBTRACEEVENT_STATIC)
diff --git a/src/event-parse-api.c b/src/event-parse-api.c
new file mode 100644
index 0000000..268a586
--- /dev/null
+++ b/src/event-parse-api.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+
+#include "event-parse.h"
+#include "event-parse-local.h"
+#include "event-utils.h"
+
+/**
+ * tep_get_event - returns the event with the given index
+ * @tep: a handle to the tep_handle
+ * @index: index of the requested event, in the range 0 .. nr_events
+ *
+ * This returns pointer to the element of the events array with the given index
+ * If @tep is NULL, or @index is not in the range 0 .. nr_events, NULL is returned.
+ */
+struct tep_event *tep_get_event(struct tep_handle *tep, int index)
+{
+ if (tep && tep->events && index < tep->nr_events)
+ return tep->events[index];
+
+ return NULL;
+}
+
+/**
+ * tep_get_first_event - returns the first event in the events array
+ * @tep: a handle to the tep_handle
+ *
+ * This returns pointer to the first element of the events array
+ * If @tep is NULL, NULL is returned.
+ */
+struct tep_event *tep_get_first_event(struct tep_handle *tep)
+{
+ return tep_get_event(tep, 0);
+}
+
+/**
+ * tep_get_events_count - get the number of defined events
+ * @tep: a handle to the tep_handle
+ *
+ * This returns number of elements in event array
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_events_count(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->nr_events;
+ return 0;
+}
+
+/**
+ * tep_get_events_count - get the number of defined events
+ * @tep: a handle to the tep_handle
+ *
+ * This returns number of elements in event array
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_function_count(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->func_count;
+ return 0;
+}
+
+/**
+ * tep_set_flag - set event parser flag
+ * @tep: a handle to the tep_handle
+ * @flag: flag, or combination of flags to be set
+ * can be any combination from enum tep_flag
+ *
+ * This sets a flag or combination of flags from enum tep_flag
+ */
+void tep_set_flag(struct tep_handle *tep, int flag)
+{
+ if (tep)
+ tep->flags |= flag;
+}
+
+/**
+ * tep_clear_flag - clear event parser flag
+ * @tep: a handle to the tep_handle
+ * @flag: flag to be cleared
+ *
+ * This clears a tep flag
+ */
+void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag)
+{
+ if (tep)
+ tep->flags &= ~flag;
+}
+
+/**
+ * tep_test_flag - check the state of event parser flag
+ * @tep: a handle to the tep_handle
+ * @flag: flag to be checked
+ *
+ * This returns the state of the requested tep flag.
+ * Returns: true if the flag is set, false otherwise.
+ */
+bool tep_test_flag(struct tep_handle *tep, enum tep_flag flag)
+{
+ if (tep)
+ return tep->flags & flag;
+ return false;
+}
+
+__hidden unsigned short data2host2(struct tep_handle *tep, unsigned short data)
+{
+ unsigned short swap;
+
+ if (!tep || tep->host_bigendian == tep->file_bigendian)
+ return data;
+
+ swap = ((data & 0xffULL) << 8) |
+ ((data & (0xffULL << 8)) >> 8);
+
+ return swap;
+}
+
+__hidden unsigned int data2host4(struct tep_handle *tep, unsigned int data)
+{
+ unsigned int swap;
+
+ if (!tep || tep->host_bigendian == tep->file_bigendian)
+ return data;
+
+ swap = ((data & 0xffULL) << 24) |
+ ((data & (0xffULL << 8)) << 8) |
+ ((data & (0xffULL << 16)) >> 8) |
+ ((data & (0xffULL << 24)) >> 24);
+
+ return swap;
+}
+
+__hidden unsigned long long
+data2host8(struct tep_handle *tep, unsigned long long data)
+{
+ unsigned long long swap;
+
+ if (!tep || tep->host_bigendian == tep->file_bigendian)
+ return data;
+
+ swap = ((data & 0xffULL) << 56) |
+ ((data & (0xffULL << 8)) << 40) |
+ ((data & (0xffULL << 16)) << 24) |
+ ((data & (0xffULL << 24)) << 8) |
+ ((data & (0xffULL << 32)) >> 8) |
+ ((data & (0xffULL << 40)) >> 24) |
+ ((data & (0xffULL << 48)) >> 40) |
+ ((data & (0xffULL << 56)) >> 56);
+
+ return swap;
+}
+
+/**
+ * tep_get_header_page_size - get size of the header page
+ * @tep: a handle to the tep_handle
+ *
+ * This returns size of the header page
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_header_page_size(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->header_page_size_size;
+ return 0;
+}
+
+/**
+ * tep_get_header_timestamp_size - get size of the timestamp in the header page
+ * @tep: a handle to the tep_handle
+ *
+ * This returns size of the timestamp in the header page
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_header_timestamp_size(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->header_page_ts_size;
+ return 0;
+}
+
+/**
+ * tep_get_cpus - get the number of CPUs
+ * @tep: a handle to the tep_handle
+ *
+ * This returns the number of CPUs
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_cpus(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->cpus;
+ return 0;
+}
+
+/**
+ * tep_set_cpus - set the number of CPUs
+ * @tep: a handle to the tep_handle
+ *
+ * This sets the number of CPUs
+ */
+void tep_set_cpus(struct tep_handle *tep, int cpus)
+{
+ if (tep)
+ tep->cpus = cpus;
+}
+
+/**
+ * tep_get_long_size - get the size of a long integer on the traced machine
+ * @tep: a handle to the tep_handle
+ *
+ * This returns the size of a long integer on the traced machine
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_long_size(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->long_size;
+ return 0;
+}
+
+/**
+ * tep_set_long_size - set the size of a long integer on the traced machine
+ * @tep: a handle to the tep_handle
+ * @size: size, in bytes, of a long integer
+ *
+ * This sets the size of a long integer on the traced machine
+ */
+void tep_set_long_size(struct tep_handle *tep, int long_size)
+{
+ if (tep)
+ tep->long_size = long_size;
+}
+
+/**
+ * tep_get_page_size - get the size of a memory page on the traced machine
+ * @tep: a handle to the tep_handle
+ *
+ * This returns the size of a memory page on the traced machine
+ * If @tep is NULL, 0 is returned.
+ */
+int tep_get_page_size(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->page_size;
+ return 0;
+}
+
+/**
+ * tep_set_page_size - set the size of a memory page on the traced machine
+ * @tep: a handle to the tep_handle
+ * @_page_size: size of a memory page, in bytes
+ *
+ * This sets the size of a memory page on the traced machine
+ */
+void tep_set_page_size(struct tep_handle *tep, int _page_size)
+{
+ if (tep)
+ tep->page_size = _page_size;
+}
+
+/**
+ * tep_get_sub_buffer_size - get the size of a trace buffer page
+ * @tep: a handle to the tep_handle
+ *
+ * This returns the size of a trace buffer page on the traced machine.
+ * If @tep is NULL then -1 is returned.
+ */
+int tep_get_sub_buffer_size(struct tep_handle *tep)
+{
+ if (!tep)
+ return -1;
+
+ return tep->header_page_data_size + tep->header_page_data_offset;
+}
+
+/**
+ * tep_is_file_bigendian - return the endian of the file
+ * @tep: a handle to the tep_handle
+ *
+ * This returns true if the file is in big endian order
+ * If @tep is NULL, false is returned.
+ */
+bool tep_is_file_bigendian(struct tep_handle *tep)
+{
+ if (tep)
+ return (tep->file_bigendian == TEP_BIG_ENDIAN);
+ return false;
+}
+
+/**
+ * tep_set_file_bigendian - set if the file is in big endian order
+ * @tep: a handle to the tep_handle
+ * @endian: non zero, if the file is in big endian order
+ *
+ * This sets if the file is in big endian order
+ */
+void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian)
+{
+ if (tep)
+ tep->file_bigendian = endian;
+}
+
+/**
+ * tep_is_local_bigendian - return the endian of the saved local machine
+ * @tep: a handle to the tep_handle
+ *
+ * This returns true if the saved local machine in @tep is big endian.
+ * If @tep is NULL, false is returned.
+ */
+bool tep_is_local_bigendian(struct tep_handle *tep)
+{
+ if (tep)
+ return (tep->host_bigendian == TEP_BIG_ENDIAN);
+ return 0;
+}
+
+/**
+ * tep_set_local_bigendian - set the stored local machine endian order
+ * @tep: a handle to the tep_handle
+ * @endian: non zero, if the local host has big endian order
+ *
+ * This sets the endian order for the local machine.
+ */
+void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian)
+{
+ if (tep)
+ tep->host_bigendian = endian;
+}
+
+/**
+ * tep_is_old_format - get if an old kernel is used
+ * @tep: a handle to the tep_handle
+ *
+ * This returns true, if an old kernel is used to generate the tracing events or
+ * false if a new kernel is used. Old kernels did not have header page info.
+ * If @tep is NULL, false is returned.
+ */
+bool tep_is_old_format(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->old_format;
+ return false;
+}
+
+/**
+ * tep_set_test_filters - set a flag to test a filter string
+ * @tep: a handle to the tep_handle
+ * @test_filters: the new value of the test_filters flag
+ *
+ * This sets a flag to test a filter string. If this flag is set, when
+ * tep_filter_add_filter_str() API as called,it will print the filter string
+ * instead of adding it.
+ */
+void tep_set_test_filters(struct tep_handle *tep, int test_filters)
+{
+ if (tep)
+ tep->test_filters = test_filters;
+}
diff --git a/src/event-parse-local.h b/src/event-parse-local.h
new file mode 100644
index 0000000..c6bfc61
--- /dev/null
+++ b/src/event-parse-local.h
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+
+#ifndef _PARSE_EVENTS_INT_H
+#define _PARSE_EVENTS_INT_H
+
+struct tep_cmdline;
+struct cmdline_list;
+struct func_map;
+struct func_list;
+struct event_handler;
+struct func_resolver;
+struct tep_plugins_dir;
+
+#define __hidden __attribute__((visibility ("hidden")))
+
+struct tep_handle {
+ int ref_count;
+
+ int header_page_ts_offset;
+ int header_page_ts_size;
+ int header_page_size_offset;
+ int header_page_size_size;
+ int header_page_data_offset;
+ int header_page_data_size;
+ int header_page_overwrite;
+
+ enum tep_endian file_bigendian;
+ enum tep_endian host_bigendian;
+
+ int old_format;
+
+ int cpus;
+ int long_size;
+ int page_size;
+
+ struct tep_cmdline *cmdlines;
+ struct cmdline_list *cmdlist;
+ int cmdline_count;
+
+ struct func_map *func_map;
+ struct func_resolver *func_resolver;
+ struct func_list *funclist;
+ unsigned int func_count;
+
+ struct printk_map *printk_map;
+ struct printk_list *printklist;
+ unsigned int printk_count;
+
+ struct tep_event **events;
+ int nr_events;
+ struct tep_event **sort_events;
+ enum tep_event_sort_type last_type;
+
+ int type_offset;
+ int type_size;
+
+ int pid_offset;
+ int pid_size;
+
+ int pc_offset;
+ int pc_size;
+
+ int flags_offset;
+ int flags_size;
+
+ int ld_offset;
+ int ld_size;
+
+ int test_filters;
+
+ int flags;
+
+ struct tep_format_field *bprint_ip_field;
+ struct tep_format_field *bprint_fmt_field;
+ struct tep_format_field *bprint_buf_field;
+
+ struct event_handler *handlers;
+ struct tep_function_handler *func_handlers;
+
+ /* cache */
+ struct tep_event *last_event;
+
+ struct tep_plugins_dir *plugins_dir;
+
+ const char *input_buf;
+ unsigned long long input_buf_ptr;
+ unsigned long long input_buf_siz;
+};
+
+enum tep_print_parse_type {
+ PRINT_FMT_STRING,
+ PRINT_FMT_ARG_DIGIT,
+ PRINT_FMT_ARG_POINTER,
+ PRINT_FMT_ARG_STRING,
+};
+
+struct tep_print_parse {
+ struct tep_print_parse *next;
+
+ char *format;
+ int ls;
+ enum tep_print_parse_type type;
+ struct tep_print_arg *arg;
+ struct tep_print_arg *len_as_arg;
+};
+
+void free_tep_event(struct tep_event *event);
+void free_tep_format_field(struct tep_format_field *field);
+void free_tep_plugin_paths(struct tep_handle *tep);
+
+unsigned short data2host2(struct tep_handle *tep, unsigned short data);
+unsigned int data2host4(struct tep_handle *tep, unsigned int data);
+unsigned long long data2host8(struct tep_handle *tep, unsigned long long data);
+
+/* access to the internal parser */
+int peek_char(struct tep_handle *tep);
+void init_input_buf(struct tep_handle *tep, const char *buf, unsigned long long size);
+unsigned long long get_input_buf_ptr(struct tep_handle *tep);
+const char *get_input_buf(struct tep_handle *tep);
+enum tep_event_type read_token(struct tep_handle *tep, char **tok);
+void free_token(char *tok);
+
+#endif /* _PARSE_EVENTS_INT_H */
diff --git a/src/event-parse.c b/src/event-parse.c
new file mode 100644
index 0000000..e655087
--- /dev/null
+++ b/src/event-parse.c
@@ -0,0 +1,8592 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ *
+ * The parts for function graph printing was taken and modified from the
+ * Linux Kernel that were written by
+ * - Copyright (C) 2009 Frederic Weisbecker,
+ * Frederic Weisbecker gave his permission to relicense the code to
+ * the Lesser General Public License.
+ */
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <limits.h>
+#include <linux/time64.h>
+
+#include <netinet/in.h>
+#include "event-parse.h"
+
+#include "event-parse-local.h"
+#include "event-utils.h"
+#include "trace-seq.h"
+
+static int is_flag_field;
+static int is_symbolic_field;
+
+static int show_warning = 1;
+
+#define do_warning(fmt, ...) \
+ do { \
+ if (show_warning) \
+ tep_warning(fmt, ##__VA_ARGS__);\
+ } while (0)
+
+#define do_warning_event(event, fmt, ...) \
+ do { \
+ if (!show_warning) \
+ continue; \
+ \
+ if (event) \
+ tep_warning("[%s:%s] " fmt, event->system, \
+ event->name, ##__VA_ARGS__); \
+ else \
+ tep_warning(fmt, ##__VA_ARGS__); \
+ } while (0)
+
+/**
+ * init_input_buf - init buffer for parsing
+ * @buf: buffer to parse
+ * @size: the size of the buffer
+ *
+ * Initializes the internal buffer that tep_read_token() will parse.
+ */
+__hidden void init_input_buf(struct tep_handle *tep, const char *buf,
+ unsigned long long size)
+{
+ tep->input_buf = buf;
+ tep->input_buf_siz = size;
+ tep->input_buf_ptr = 0;
+}
+
+__hidden const char *get_input_buf(struct tep_handle *tep)
+{
+ return tep->input_buf;
+}
+
+__hidden unsigned long long get_input_buf_ptr(struct tep_handle *tep)
+{
+ return tep->input_buf_ptr;
+}
+
+struct event_handler {
+ struct event_handler *next;
+ int id;
+ const char *sys_name;
+ const char *event_name;
+ tep_event_handler_func func;
+ void *context;
+};
+
+struct func_params {
+ struct func_params *next;
+ enum tep_func_arg_type type;
+};
+
+struct tep_function_handler {
+ struct tep_function_handler *next;
+ enum tep_func_arg_type ret_type;
+ char *name;
+ tep_func_handler func;
+ struct func_params *params;
+ int nr_args;
+};
+
+static unsigned long long
+process_defined_func(struct trace_seq *s, void *data, int size,
+ struct tep_event *event, struct tep_print_arg *arg);
+
+static void free_func_handle(struct tep_function_handler *func);
+
+void breakpoint(void)
+{
+ static int x;
+ x++;
+}
+
+static const char *get_event_type(enum tep_event_type type)
+{
+ switch (type) {
+ case TEP_EVENT_ERROR: return "ERROR";
+ case TEP_EVENT_NONE: return "NONE";
+ case TEP_EVENT_SPACE: return "SPACE";
+ case TEP_EVENT_NEWLINE: return "NEWLINE";
+ case TEP_EVENT_OP: return "OP";
+ case TEP_EVENT_DELIM: return "DELIM";
+ case TEP_EVENT_ITEM: return "ITEM";
+ case TEP_EVENT_DQUOTE: return "DQUOTE";
+ case TEP_EVENT_SQUOTE: return "SQUOTE";
+ }
+ return "(UNKNOWN)";
+}
+
+static struct tep_print_arg *alloc_arg(void)
+{
+ return calloc(1, sizeof(struct tep_print_arg));
+}
+
+struct tep_cmdline {
+ char *comm;
+ int pid;
+};
+
+static int cmdline_cmp(const void *a, const void *b)
+{
+ const struct tep_cmdline *ca = a;
+ const struct tep_cmdline *cb = b;
+
+ if (ca->pid < cb->pid)
+ return -1;
+ if (ca->pid > cb->pid)
+ return 1;
+
+ return 0;
+}
+
+/* Looking for where to place the key */
+static int cmdline_slot_cmp(const void *a, const void *b)
+{
+ const struct tep_cmdline *ca = a;
+ const struct tep_cmdline *cb = b;
+ const struct tep_cmdline *cb1 = cb + 1;
+
+ if (ca->pid < cb->pid)
+ return -1;
+
+ if (ca->pid > cb->pid) {
+ if (ca->pid <= cb1->pid)
+ return 0;
+ return 1;
+ }
+
+ return 0;
+}
+
+struct cmdline_list {
+ struct cmdline_list *next;
+ char *comm;
+ int pid;
+};
+
+static int cmdline_init(struct tep_handle *tep)
+{
+ struct cmdline_list *cmdlist = tep->cmdlist;
+ struct cmdline_list *item;
+ struct tep_cmdline *cmdlines;
+ int i;
+
+ cmdlines = malloc(sizeof(*cmdlines) * tep->cmdline_count);
+ if (!cmdlines)
+ return -1;
+
+ i = 0;
+ while (cmdlist) {
+ cmdlines[i].pid = cmdlist->pid;
+ cmdlines[i].comm = cmdlist->comm;
+ i++;
+ item = cmdlist;
+ cmdlist = cmdlist->next;
+ free(item);
+ }
+
+ qsort(cmdlines, tep->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
+
+ tep->cmdlines = cmdlines;
+ tep->cmdlist = NULL;
+
+ return 0;
+}
+
+static const char *find_cmdline(struct tep_handle *tep, int pid)
+{
+ const struct tep_cmdline *comm;
+ struct tep_cmdline key;
+
+ if (!pid)
+ return "<idle>";
+
+ if (!tep->cmdlines && cmdline_init(tep))
+ return "<not enough memory for cmdlines!>";
+
+ key.pid = pid;
+
+ comm = bsearch(&key, tep->cmdlines, tep->cmdline_count,
+ sizeof(*tep->cmdlines), cmdline_cmp);
+
+ if (comm)
+ return comm->comm;
+ return "<...>";
+}
+
+/**
+ * tep_is_pid_registered - return if a pid has a cmdline registered
+ * @tep: a handle to the trace event parser context
+ * @pid: The pid to check if it has a cmdline registered with.
+ *
+ * Returns true if the pid has a cmdline mapped to it
+ * false otherwise.
+ */
+bool tep_is_pid_registered(struct tep_handle *tep, int pid)
+{
+ const struct tep_cmdline *comm;
+ struct tep_cmdline key;
+
+ if (!pid)
+ return true;
+
+ if (!tep->cmdlines && cmdline_init(tep))
+ return false;
+
+ key.pid = pid;
+
+ comm = bsearch(&key, tep->cmdlines, tep->cmdline_count,
+ sizeof(*tep->cmdlines), cmdline_cmp);
+
+ if (comm)
+ return true;
+ return false;
+}
+
+/*
+ * If the command lines have been converted to an array, then
+ * we must add this pid. This is much slower than when cmdlines
+ * are added before the array is initialized.
+ */
+static int add_new_comm(struct tep_handle *tep,
+ const char *comm, int pid, bool override)
+{
+ struct tep_cmdline *cmdlines = tep->cmdlines;
+ struct tep_cmdline *cmdline;
+ struct tep_cmdline key;
+ char *new_comm;
+ int cnt;
+
+ if (!pid)
+ return 0;
+
+ /* avoid duplicates */
+ key.pid = pid;
+
+ cmdline = bsearch(&key, tep->cmdlines, tep->cmdline_count,
+ sizeof(*tep->cmdlines), cmdline_cmp);
+ if (cmdline) {
+ if (!override) {
+ errno = EEXIST;
+ return -1;
+ }
+ new_comm = strdup(comm);
+ if (!new_comm) {
+ errno = ENOMEM;
+ return -1;
+ }
+ free(cmdline->comm);
+ cmdline->comm = new_comm;
+
+ return 0;
+ }
+
+ cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (tep->cmdline_count + 1));
+ if (!cmdlines) {
+ errno = ENOMEM;
+ return -1;
+ }
+ tep->cmdlines = cmdlines;
+
+ key.comm = strdup(comm);
+ if (!key.comm) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ if (!tep->cmdline_count) {
+ /* no entries yet */
+ tep->cmdlines[0] = key;
+ tep->cmdline_count++;
+ return 0;
+ }
+
+ /* Now find where we want to store the new cmdline */
+ cmdline = bsearch(&key, tep->cmdlines, tep->cmdline_count - 1,
+ sizeof(*tep->cmdlines), cmdline_slot_cmp);
+
+ cnt = tep->cmdline_count;
+ if (cmdline) {
+ /* cmdline points to the one before the spot we want */
+ cmdline++;
+ cnt -= cmdline - tep->cmdlines;
+
+ } else {
+ /* The new entry is either before or after the list */
+ if (key.pid > tep->cmdlines[tep->cmdline_count - 1].pid) {
+ tep->cmdlines[tep->cmdline_count++] = key;
+ return 0;
+ }
+ cmdline = &tep->cmdlines[0];
+ }
+ memmove(cmdline + 1, cmdline, (cnt * sizeof(*cmdline)));
+ *cmdline = key;
+
+ tep->cmdline_count++;
+
+ return 0;
+}
+
+static int _tep_register_comm(struct tep_handle *tep,
+ const char *comm, int pid, bool override)
+{
+ struct cmdline_list *item;
+
+ if (tep->cmdlines)
+ return add_new_comm(tep, comm, pid, override);
+
+ item = malloc(sizeof(*item));
+ if (!item)
+ return -1;
+
+ if (comm)
+ item->comm = strdup(comm);
+ else
+ item->comm = strdup("<...>");
+ if (!item->comm) {
+ free(item);
+ return -1;
+ }
+ item->pid = pid;
+ item->next = tep->cmdlist;
+
+ tep->cmdlist = item;
+ tep->cmdline_count++;
+
+ return 0;
+}
+
+/**
+ * tep_register_comm - register a pid / comm mapping
+ * @tep: a handle to the trace event parser context
+ * @comm: the command line to register
+ * @pid: the pid to map the command line to
+ *
+ * This adds a mapping to search for command line names with
+ * a given pid. The comm is duplicated. If a command with the same pid
+ * already exist, -1 is returned and errno is set to EEXIST
+ */
+int tep_register_comm(struct tep_handle *tep, const char *comm, int pid)
+{
+ return _tep_register_comm(tep, comm, pid, false);
+}
+
+/**
+ * tep_override_comm - register a pid / comm mapping
+ * @tep: a handle to the trace event parser context
+ * @comm: the command line to register
+ * @pid: the pid to map the command line to
+ *
+ * This adds a mapping to search for command line names with
+ * a given pid. The comm is duplicated. If a command with the same pid
+ * already exist, the command string is udapted with the new one
+ */
+int tep_override_comm(struct tep_handle *tep, const char *comm, int pid)
+{
+ if (!tep->cmdlines && cmdline_init(tep)) {
+ errno = ENOMEM;
+ return -1;
+ }
+ return _tep_register_comm(tep, comm, pid, true);
+}
+
+/**
+ * tep_parse_saved_cmdlines - parse the comms from the saved_cmdlines file
+ * @tep: a handle to the trace event parser
+ * @buf: A string buffer that holds the content of saved_cmdlines and ends with '\0'
+ *
+ * This is a helper function to parse the comms in the tracefs saved_cmdlines
+ * file (stored in a string buffer) and load the comms into the @tep handler
+ * such that comm name matches an process ID (pid). This is used to show
+ * the names of the processes as the events only hold the pid.
+ *
+ * Returns 0 on success, and -1 on error.
+ */
+int tep_parse_saved_cmdlines(struct tep_handle *tep, const char *buf)
+{
+ char *copy;
+ char *comm;
+ char *line;
+ char *next = NULL;
+ int pid;
+ int ret = -1;
+ int n;
+
+ copy = strdup(buf);
+ if (!copy)
+ return -1;
+
+ line = strtok_r(copy, "\n", &next);
+ while (line) {
+ errno = 0;
+ n = sscanf(line, "%d %m[^\n]s", &pid, &comm);
+ if (errno || n != 2 || !comm)
+ goto out;
+ tep_register_comm(tep, comm, pid);
+ free(comm);
+ line = strtok_r(NULL, "\n", &next);
+ }
+ ret = 0;
+ out:
+ free(copy);
+ return ret;
+}
+
+struct func_map {
+ unsigned long long addr;
+ char *func;
+ char *mod;
+};
+
+struct func_list {
+ struct func_list *next;
+ unsigned long long addr;
+ char *func;
+ char *mod;
+};
+
+static int func_cmp(const void *a, const void *b)
+{
+ const struct func_map *fa = a;
+ const struct func_map *fb = b;
+
+ if (fa->addr < fb->addr)
+ return -1;
+ if (fa->addr > fb->addr)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * We are searching for a record in between, not an exact
+ * match.
+ */
+static int func_bcmp(const void *a, const void *b)
+{
+ const struct func_map *fa = a;
+ const struct func_map *fb = b;
+
+ if ((fa->addr == fb->addr) ||
+
+ (fa->addr > fb->addr &&
+ fa->addr < (fb+1)->addr))
+ return 0;
+
+ if (fa->addr < fb->addr)
+ return -1;
+
+ return 1;
+}
+
+static int func_map_init(struct tep_handle *tep)
+{
+ struct func_list *funclist;
+ struct func_list *item;
+ struct func_map *func_map;
+ int i;
+
+ func_map = malloc(sizeof(*func_map) * (tep->func_count + 1));
+ if (!func_map)
+ return -1;
+
+ funclist = tep->funclist;
+
+ i = 0;
+ while (funclist) {
+ func_map[i].func = funclist->func;
+ func_map[i].addr = funclist->addr;
+ func_map[i].mod = funclist->mod;
+ i++;
+ item = funclist;
+ funclist = funclist->next;
+ free(item);
+ }
+
+ qsort(func_map, tep->func_count, sizeof(*func_map), func_cmp);
+
+ /*
+ * Add a special record at the end.
+ */
+ func_map[tep->func_count].func = NULL;
+ func_map[tep->func_count].addr = 0;
+ func_map[tep->func_count].mod = NULL;
+
+ tep->func_map = func_map;
+ tep->funclist = NULL;
+
+ return 0;
+}
+
+static struct func_map *
+__find_func(struct tep_handle *tep, unsigned long long addr)
+{
+ struct func_map *func;
+ struct func_map key;
+
+ if (!tep->func_map)
+ func_map_init(tep);
+
+ key.addr = addr;
+
+ func = bsearch(&key, tep->func_map, tep->func_count,
+ sizeof(*tep->func_map), func_bcmp);
+
+ return func;
+}
+
+struct func_resolver {
+ tep_func_resolver_t *func;
+ void *priv;
+ struct func_map map;
+};
+
+/**
+ * tep_set_function_resolver - set an alternative function resolver
+ * @tep: a handle to the trace event parser context
+ * @resolver: function to be used
+ * @priv: resolver function private state.
+ *
+ * Some tools may have already a way to resolve kernel functions, allow them to
+ * keep using it instead of duplicating all the entries inside tep->funclist.
+ */
+int tep_set_function_resolver(struct tep_handle *tep,
+ tep_func_resolver_t *func, void *priv)
+{
+ struct func_resolver *resolver = malloc(sizeof(*resolver));
+
+ if (resolver == NULL)
+ return -1;
+
+ resolver->func = func;
+ resolver->priv = priv;
+
+ free(tep->func_resolver);
+ tep->func_resolver = resolver;
+
+ return 0;
+}
+
+/**
+ * tep_reset_function_resolver - reset alternative function resolver
+ * @tep: a handle to the trace event parser context
+ *
+ * Stop using whatever alternative resolver was set, use the default
+ * one instead.
+ */
+void tep_reset_function_resolver(struct tep_handle *tep)
+{
+ free(tep->func_resolver);
+ tep->func_resolver = NULL;
+}
+
+static struct func_map *
+find_func(struct tep_handle *tep, unsigned long long addr)
+{
+ struct func_map *map;
+
+ if (!tep->func_resolver)
+ return __find_func(tep, addr);
+
+ map = &tep->func_resolver->map;
+ map->mod = NULL;
+ map->addr = addr;
+ map->func = tep->func_resolver->func(tep->func_resolver->priv,
+ &map->addr, &map->mod);
+ if (map->func == NULL)
+ return NULL;
+
+ return map;
+}
+
+/**
+ * tep_find_function_info - find a function by a given address
+ * @tep: a handle to the trace event parser context
+ * @addr: the address to find the function with
+ * @name: Return the name of the function (if found)
+ * @start: Return the start of the function (if found)
+ * @size: Return the size of the function (if found)
+ *
+ * Returns 1 if found, and 0 if it is not.
+ * If found then @name will point to the name of the function.
+ * @start: will contain the starting address of the function.
+ * @size: will contain the size of the function.
+ */
+int tep_find_function_info(struct tep_handle *tep, unsigned long long addr,
+ const char **name, unsigned long long *start,
+ unsigned long *size)
+{
+ struct func_map *map;
+
+ map = find_func(tep, addr);
+ if (!map)
+ return 0;
+
+ if (name)
+ *name = map->func;
+ if (start)
+ *start = map->addr;
+ if (size) {
+ if (!tep->func_resolver)
+ *size = map[1].addr - map->addr;
+ else
+ *size = 0;
+ }
+
+ return 1;
+}
+
+/**
+ * tep_find_function - find a function by a given address
+ * @tep: a handle to the trace event parser context
+ * @addr: the address to find the function with
+ *
+ * Returns a pointer to the function stored that has the given
+ * address. Note, the address does not have to be exact, it
+ * will select the function that would contain the address.
+ */
+const char *tep_find_function(struct tep_handle *tep, unsigned long long addr)
+{
+ struct func_map *map;
+
+ map = find_func(tep, addr);
+ if (!map)
+ return NULL;
+
+ return map->func;
+}
+
+/**
+ * tep_find_function_address - find a function address by a given address
+ * @tep: a handle to the trace event parser context
+ * @addr: the address to find the function with
+ *
+ * Returns the address the function starts at. This can be used in
+ * conjunction with tep_find_function to print both the function
+ * name and the function offset.
+ */
+unsigned long long
+tep_find_function_address(struct tep_handle *tep, unsigned long long addr)
+{
+ struct func_map *map;
+
+ map = find_func(tep, addr);
+ if (!map)
+ return 0;
+
+ return map->addr;
+}
+
+/**
+ * tep_register_function - register a function with a given address
+ * @tep: a handle to the trace event parser context
+ * @function: the function name to register
+ * @addr: the address the function starts at
+ * @mod: the kernel module the function may be in (NULL for none)
+ *
+ * This registers a function name with an address and module.
+ * The @func passed in is duplicated.
+ */
+int tep_register_function(struct tep_handle *tep, char *func,
+ unsigned long long addr, char *mod)
+{
+ struct func_list *item = malloc(sizeof(*item));
+
+ if (!item)
+ return -1;
+
+ item->next = tep->funclist;
+ item->func = strdup(func);
+ if (!item->func)
+ goto out_free;
+
+ if (mod) {
+ item->mod = strdup(mod);
+ if (!item->mod)
+ goto out_free_func;
+ } else
+ item->mod = NULL;
+ item->addr = addr;
+
+ tep->funclist = item;
+ tep->func_count++;
+
+ return 0;
+
+out_free_func:
+ free(item->func);
+ item->func = NULL;
+out_free:
+ free(item);
+ errno = ENOMEM;
+ return -1;
+}
+
+/**
+ * tep_parse_kallsyms - load functions from a read of /proc/kallsyms
+ * @tep: a handle to the trace event parser
+ * @kallsyms: A string buffer that holds the content of /proc/kallsyms and ends with '\0'
+ *
+ * This is a helper function to parse the Linux kernel /proc/kallsyms
+ * format (stored in a string buffer) and load the functions into
+ * the @tep handler such that function IP addresses can be mapped to
+ * their name when parsing events with %pS in the print format field.
+ *
+ * Returns 0 on success, and -1 on error.
+ */
+int tep_parse_kallsyms(struct tep_handle *tep, const char *kallsyms)
+{
+ unsigned long long addr;
+ char *copy;
+ char *func;
+ char *line;
+ char *next = NULL;
+ char *mod;
+ char ch;
+ int ret = -1;
+
+ copy = strdup(kallsyms);
+ if (!copy)
+ return -1;
+
+ line = strtok_r(copy, "\n", &next);
+ while (line) {
+ int func_start, func_end = 0;
+ int mod_start, mod_end = 0;
+ int n;
+
+ mod = NULL;
+ errno = 0;
+ n = sscanf(line, "%16llx %c %n%*s%n%*1[\t][%n%*s%n",
+ &addr, &ch, &func_start, &func_end, &mod_start, &mod_end);
+ if (errno)
+ goto out;
+
+ if (n != 2 || !func_end) {
+ tep_warning("Failed to parse kallsyms n=%d func_end=%d",
+ n, func_end);
+ goto out;
+ }
+
+ func = line + func_start;
+ /*
+ * Hacks for
+ * - arm arch that adds a lot of bogus '$a' functions
+ * - x86-64 that reports per-cpu variable offsets as absolute
+ */
+ if (func[0] != '$' && ch != 'A' && ch != 'a') {
+ line[func_end] = 0;
+ if (mod_end) {
+ mod = line + mod_start;
+ /* truncate the extra ']' */
+ line[mod_end - 1] = 0;
+ }
+ tep_register_function(tep, func, addr, mod);
+ }
+
+ line = strtok_r(NULL, "\n", &next);
+ }
+ free(line);
+ ret = 0;
+ out:
+ free(copy);
+
+ return ret;
+}
+
+/**
+ * tep_print_funcs - print out the stored functions
+ * @tep: a handle to the trace event parser context
+ *
+ * This prints out the stored functions.
+ */
+void tep_print_funcs(struct tep_handle *tep)
+{
+ int i;
+
+ if (!tep->func_map)
+ func_map_init(tep);
+
+ for (i = 0; i < (int)tep->func_count; i++) {
+ printf("%016llx %s",
+ tep->func_map[i].addr,
+ tep->func_map[i].func);
+ if (tep->func_map[i].mod)
+ printf(" [%s]\n", tep->func_map[i].mod);
+ else
+ printf("\n");
+ }
+}
+
+struct printk_map {
+ unsigned long long addr;
+ char *printk;
+};
+
+struct printk_list {
+ struct printk_list *next;
+ unsigned long long addr;
+ char *printk;
+};
+
+static int printk_cmp(const void *a, const void *b)
+{
+ const struct printk_map *pa = a;
+ const struct printk_map *pb = b;
+
+ if (pa->addr < pb->addr)
+ return -1;
+ if (pa->addr > pb->addr)
+ return 1;
+
+ return 0;
+}
+
+static int printk_map_init(struct tep_handle *tep)
+{
+ struct printk_list *printklist;
+ struct printk_list *item;
+ struct printk_map *printk_map;
+ int i;
+
+ printk_map = malloc(sizeof(*printk_map) * (tep->printk_count + 1));
+ if (!printk_map)
+ return -1;
+
+ printklist = tep->printklist;
+
+ i = 0;
+ while (printklist) {
+ printk_map[i].printk = printklist->printk;
+ printk_map[i].addr = printklist->addr;
+ i++;
+ item = printklist;
+ printklist = printklist->next;
+ free(item);
+ }
+
+ qsort(printk_map, tep->printk_count, sizeof(*printk_map), printk_cmp);
+
+ tep->printk_map = printk_map;
+ tep->printklist = NULL;
+
+ return 0;
+}
+
+static struct printk_map *
+find_printk(struct tep_handle *tep, unsigned long long addr)
+{
+ struct printk_map *printk;
+ struct printk_map key;
+
+ if (!tep->printk_map && printk_map_init(tep))
+ return NULL;
+
+ key.addr = addr;
+
+ printk = bsearch(&key, tep->printk_map, tep->printk_count,
+ sizeof(*tep->printk_map), printk_cmp);
+
+ return printk;
+}
+
+/**
+ * tep_register_print_string - register a string by its address
+ * @tep: a handle to the trace event parser context
+ * @fmt: the string format to register
+ * @addr: the address the string was located at
+ *
+ * This registers a string by the address it was stored in the kernel.
+ * The @fmt passed in is duplicated.
+ */
+int tep_register_print_string(struct tep_handle *tep, const char *fmt,
+ unsigned long long addr)
+{
+ struct printk_list *item = malloc(sizeof(*item));
+ char *p;
+
+ if (!item)
+ return -1;
+
+ item->next = tep->printklist;
+ item->addr = addr;
+
+ /* Strip off quotes and '\n' from the end */
+ if (fmt[0] == '"')
+ fmt++;
+ item->printk = strdup(fmt);
+ if (!item->printk)
+ goto out_free;
+
+ p = item->printk + strlen(item->printk) - 1;
+ if (*p == '"')
+ *p = 0;
+
+ p -= 2;
+ if (strcmp(p, "\\n") == 0)
+ *p = 0;
+
+ tep->printklist = item;
+ tep->printk_count++;
+
+ return 0;
+
+out_free:
+ free(item);
+ errno = ENOMEM;
+ return -1;
+}
+
+/**
+ * tep_print_printk - print out the stored strings
+ * @tep: a handle to the trace event parser context
+ *
+ * This prints the string formats that were stored.
+ */
+void tep_print_printk(struct tep_handle *tep)
+{
+ int i;
+
+ if (!tep->printk_map)
+ printk_map_init(tep);
+
+ for (i = 0; i < (int)tep->printk_count; i++) {
+ printf("%016llx %s\n",
+ tep->printk_map[i].addr,
+ tep->printk_map[i].printk);
+ }
+}
+
+/**
+ * tep_parse_printk_formats - Parse the address to strings
+ * @tep: a handle to the trace event parser
+ * @buf: A string buffer that holds the content of printk_formats and ends with '\0'
+ *
+ * This is a helper function to parse the address to printk formats in
+ * the kernel. Some events use %s to a kernel address that holds a constant
+ * string. The printk_formats file has a mapping of these addresses to the
+ * strings that are in the kernel. This parses the content of that file
+ * and registers those strings and their addresses so that the parsing of
+ * events can display the string as the event only has the address of the string.
+ *
+ * Returns 0 on success, and -1 on error.
+ */
+int tep_parse_printk_formats(struct tep_handle *tep, const char *buf)
+{
+ unsigned long long addr;
+ char *addr_str;
+ char *printk;
+ char *copy;
+ char *line;
+ char *next;
+ char *fmt;
+ int ret = -1;
+
+ copy = strdup(buf);
+ if (!copy)
+ return -1;
+
+ line = strtok_r(copy, "\n", &next);
+ while (line) {
+ addr_str = strtok_r(line, ":", &fmt);
+ if (!addr_str) {
+ tep_warning("printk format with empty entry");
+ break;
+ }
+ addr = strtoull(addr_str, NULL, 16);
+ /* fmt still has a space, skip it */
+ printk = strdup(fmt+1);
+ if (!printk)
+ goto out;
+ line = strtok_r(NULL, "\n", &next);
+ tep_register_print_string(tep, printk, addr);
+ free(printk);
+ }
+ ret = 0;
+ out:
+ free(copy);
+ return ret;
+}
+
+static struct tep_event *alloc_event(void)
+{
+ return calloc(1, sizeof(struct tep_event));
+}
+
+static int add_event(struct tep_handle *tep, struct tep_event *event)
+{
+ int i;
+ struct tep_event **events = realloc(tep->events, sizeof(event) *
+ (tep->nr_events + 1));
+ if (!events)
+ return -1;
+
+ tep->events = events;
+
+ for (i = 0; i < tep->nr_events; i++) {
+ if (tep->events[i]->id > event->id)
+ break;
+ }
+ if (i < tep->nr_events)
+ memmove(&tep->events[i + 1],
+ &tep->events[i],
+ sizeof(event) * (tep->nr_events - i));
+
+ tep->events[i] = event;
+ tep->nr_events++;
+
+ event->tep = tep;
+
+ return 0;
+}
+
+static int event_item_type(enum tep_event_type type)
+{
+ switch (type) {
+ case TEP_EVENT_ITEM ... TEP_EVENT_SQUOTE:
+ return 1;
+ case TEP_EVENT_ERROR ... TEP_EVENT_DELIM:
+ default:
+ return 0;
+ }
+}
+
+static void free_flag_sym(struct tep_print_flag_sym *fsym)
+{
+ struct tep_print_flag_sym *next;
+
+ while (fsym) {
+ next = fsym->next;
+ free(fsym->value);
+ free(fsym->str);
+ free(fsym);
+ fsym = next;
+ }
+}
+
+static void free_arg(struct tep_print_arg *arg)
+{
+ struct tep_print_arg *farg;
+
+ if (!arg)
+ return;
+
+ switch (arg->type) {
+ case TEP_PRINT_ATOM:
+ free(arg->atom.atom);
+ break;
+ case TEP_PRINT_FIELD:
+ free(arg->field.name);
+ break;
+ case TEP_PRINT_FLAGS:
+ free_arg(arg->flags.field);
+ free(arg->flags.delim);
+ free_flag_sym(arg->flags.flags);
+ break;
+ case TEP_PRINT_SYMBOL:
+ free_arg(arg->symbol.field);
+ free_flag_sym(arg->symbol.symbols);
+ break;
+ case TEP_PRINT_HEX:
+ case TEP_PRINT_HEX_STR:
+ free_arg(arg->hex.field);
+ free_arg(arg->hex.size);
+ break;
+ case TEP_PRINT_INT_ARRAY:
+ free_arg(arg->int_array.field);
+ free_arg(arg->int_array.count);
+ free_arg(arg->int_array.el_size);
+ break;
+ case TEP_PRINT_TYPE:
+ free(arg->typecast.type);
+ free_arg(arg->typecast.item);
+ break;
+ case TEP_PRINT_STRING:
+ case TEP_PRINT_BSTRING:
+ free(arg->string.string);
+ break;
+ case TEP_PRINT_BITMASK:
+ case TEP_PRINT_CPUMASK:
+ free(arg->bitmask.bitmask);
+ break;
+ case TEP_PRINT_DYNAMIC_ARRAY:
+ case TEP_PRINT_DYNAMIC_ARRAY_LEN:
+ free(arg->dynarray.index);
+ break;
+ case TEP_PRINT_OP:
+ free(arg->op.op);
+ free_arg(arg->op.left);
+ free_arg(arg->op.right);
+ break;
+ case TEP_PRINT_FUNC:
+ while (arg->func.args) {
+ farg = arg->func.args;
+ arg->func.args = farg->next;
+ free_arg(farg);
+ }
+ break;
+
+ case TEP_PRINT_NULL:
+ default:
+ break;
+ }
+
+ free(arg);
+}
+
+static enum tep_event_type get_type(int ch)
+{
+ if (ch == '\n')
+ return TEP_EVENT_NEWLINE;
+ if (isspace(ch))
+ return TEP_EVENT_SPACE;
+ if (isalnum(ch) || ch == '_')
+ return TEP_EVENT_ITEM;
+ if (ch == '\'')
+ return TEP_EVENT_SQUOTE;
+ if (ch == '"')
+ return TEP_EVENT_DQUOTE;
+ if (!isprint(ch))
+ return TEP_EVENT_NONE;
+ if (ch == '(' || ch == ')' || ch == ',')
+ return TEP_EVENT_DELIM;
+
+ return TEP_EVENT_OP;
+}
+
+static int __read_char(struct tep_handle *tep)
+{
+ if (tep->input_buf_ptr >= tep->input_buf_siz)
+ return -1;
+
+ return tep->input_buf[tep->input_buf_ptr++];
+}
+
+/**
+ * peek_char - peek at the next character that will be read
+ *
+ * Returns the next character read, or -1 if end of buffer.
+ */
+__hidden int peek_char(struct tep_handle *tep)
+{
+ if (tep->input_buf_ptr >= tep->input_buf_siz)
+ return -1;
+
+ return tep->input_buf[tep->input_buf_ptr];
+}
+
+static int extend_token(char **tok, char *buf, int size)
+{
+ char *newtok = realloc(*tok, size);
+
+ if (!newtok) {
+ free(*tok);
+ *tok = NULL;
+ return -1;
+ }
+
+ if (!*tok)
+ strcpy(newtok, buf);
+ else
+ strcat(newtok, buf);
+ *tok = newtok;
+
+ return 0;
+}
+
+static enum tep_event_type force_token(struct tep_handle *tep, const char *str,
+ char **tok);
+
+static enum tep_event_type __read_token(struct tep_handle *tep, char **tok)
+{
+ char buf[BUFSIZ];
+ int ch, last_ch, quote_ch, next_ch;
+ int i = 0;
+ int tok_size = 0;
+ enum tep_event_type type;
+
+ *tok = NULL;
+
+
+ ch = __read_char(tep);
+ if (ch < 0)
+ return TEP_EVENT_NONE;
+
+ type = get_type(ch);
+ if (type == TEP_EVENT_NONE)
+ return type;
+
+ buf[i++] = ch;
+
+ switch (type) {
+ case TEP_EVENT_NEWLINE:
+ case TEP_EVENT_DELIM:
+ if (asprintf(tok, "%c", ch) < 0)
+ return TEP_EVENT_ERROR;
+
+ return type;
+
+ case TEP_EVENT_OP:
+ switch (ch) {
+ case '-':
+ next_ch = peek_char(tep);
+ if (next_ch == '>') {
+ buf[i++] = __read_char(tep);
+ break;
+ }
+ /* fall through */
+ case '+':
+ case '|':
+ case '&':
+ case '>':
+ case '<':
+ last_ch = ch;
+ ch = peek_char(tep);
+ if (ch != last_ch)
+ goto test_equal;
+ buf[i++] = __read_char(tep);
+ switch (last_ch) {
+ case '>':
+ case '<':
+ goto test_equal;
+ default:
+ break;
+ }
+ break;
+ case '!':
+ case '=':
+ goto test_equal;
+ default: /* what should we do instead? */
+ break;
+ }
+ buf[i] = 0;
+ *tok = strdup(buf);
+ return type;
+
+ test_equal:
+ ch = peek_char(tep);
+ if (ch == '=')
+ buf[i++] = __read_char(tep);
+ goto out;
+
+ case TEP_EVENT_DQUOTE:
+ case TEP_EVENT_SQUOTE:
+ /* don't keep quotes */
+ i--;
+ quote_ch = ch;
+ last_ch = 0;
+ concat:
+ do {
+ if (i == (BUFSIZ - 1)) {
+ buf[i] = 0;
+ tok_size += BUFSIZ;
+
+ if (extend_token(tok, buf, tok_size) < 0)
+ return TEP_EVENT_NONE;
+ i = 0;
+ }
+ last_ch = ch;
+ ch = __read_char(tep);
+ buf[i++] = ch;
+ /* the '\' '\' will cancel itself */
+ if (ch == '\\' && last_ch == '\\')
+ last_ch = 0;
+ /* Break out if the file is corrupted and giving non print chars */
+ if (ch <= 0)
+ break;
+ } while ((ch != quote_ch && isprint(ch)) || last_ch == '\\' || ch == '\n');
+ /* remove the last quote */
+ i--;
+
+ if (ch <= 0)
+ type = TEP_EVENT_NONE;
+
+ /*
+ * For strings (double quotes) check the next token.
+ * If it is another string, concatinate the two.
+ */
+ if (type == TEP_EVENT_DQUOTE) {
+ unsigned long long save_input_buf_ptr = tep->input_buf_ptr;
+
+ do {
+ ch = __read_char(tep);
+ } while (isspace(ch));
+ if (ch == '"')
+ goto concat;
+ tep->input_buf_ptr = save_input_buf_ptr;
+ }
+
+ goto out;
+
+ case TEP_EVENT_ERROR ... TEP_EVENT_SPACE:
+ case TEP_EVENT_ITEM:
+ default:
+ break;
+ }
+
+ while (get_type(peek_char(tep)) == type) {
+ if (i == (BUFSIZ - 1)) {
+ buf[i] = 0;
+ tok_size += BUFSIZ;
+
+ if (extend_token(tok, buf, tok_size) < 0)
+ return TEP_EVENT_NONE;
+ i = 0;
+ }
+ ch = __read_char(tep);
+ buf[i++] = ch;
+ }
+
+ out:
+ buf[i] = 0;
+ if (extend_token(tok, buf, tok_size + i + 1) < 0)
+ return TEP_EVENT_NONE;
+
+ if (type == TEP_EVENT_ITEM) {
+ /*
+ * Older versions of the kernel has a bug that
+ * creates invalid symbols and will break the mac80211
+ * parsing. This is a work around to that bug.
+ *
+ * See Linux kernel commit:
+ * 811cb50baf63461ce0bdb234927046131fc7fa8b
+ */
+ if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
+ free(*tok);
+ *tok = NULL;
+ return force_token(tep, "\"%s\" ", tok);
+ } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
+ free(*tok);
+ *tok = NULL;
+ return force_token(tep, "\" sta:%pM\" ", tok);
+ } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
+ free(*tok);
+ *tok = NULL;
+ return force_token(tep, "\" vif:%p(%d)\" ", tok);
+ }
+ }
+
+ return type;
+}
+
+static enum tep_event_type force_token(struct tep_handle *tep, const char *str,
+ char **tok)
+{
+ const char *save_input_buf;
+ unsigned long long save_input_buf_ptr;
+ unsigned long long save_input_buf_siz;
+ enum tep_event_type type;
+
+ /* save off the current input pointers */
+ save_input_buf = tep->input_buf;
+ save_input_buf_ptr = tep->input_buf_ptr;
+ save_input_buf_siz = tep->input_buf_siz;
+
+ init_input_buf(tep, str, strlen(str));
+
+ type = __read_token(tep, tok);
+
+ /* reset back to original token */
+ tep->input_buf = save_input_buf;
+ tep->input_buf_ptr = save_input_buf_ptr;
+ tep->input_buf_siz = save_input_buf_siz;
+
+ return type;
+}
+
+/**
+ * free_token - free a token returned by tep_read_token
+ * @token: the token to free
+ */
+__hidden void free_token(char *tok)
+{
+ if (tok)
+ free(tok);
+}
+
+/**
+ * read_token - access to utilities to use the tep parser
+ * @tok: The token to return
+ *
+ * This will parse tokens from the string given by
+ * tep_init_data().
+ *
+ * Returns the token type.
+ */
+__hidden enum tep_event_type read_token(struct tep_handle *tep, char **tok)
+{
+ enum tep_event_type type;
+
+ for (;;) {
+ type = __read_token(tep, tok);
+ if (type != TEP_EVENT_SPACE)
+ return type;
+
+ free_token(*tok);
+ }
+
+ /* not reached */
+ *tok = NULL;
+ return TEP_EVENT_NONE;
+}
+
+/* no newline */
+static enum tep_event_type read_token_item(struct tep_handle *tep, char **tok)
+{
+ enum tep_event_type type;
+
+ for (;;) {
+ type = __read_token(tep, tok);
+ if (type != TEP_EVENT_SPACE && type != TEP_EVENT_NEWLINE)
+ return type;
+ free_token(*tok);
+ *tok = NULL;
+ }
+
+ /* not reached */
+ *tok = NULL;
+ return TEP_EVENT_NONE;
+}
+
+static int test_type(enum tep_event_type type, enum tep_event_type expect)
+{
+ if (type != expect) {
+ do_warning("Error: expected type %d (%s) but read %d (%s)",
+ expect, get_event_type(expect),
+ type, get_event_type(type));
+ return -1;
+ }
+ return 0;
+}
+
+static int test_type_token(enum tep_event_type type, const char *token,
+ enum tep_event_type expect, const char *expect_tok)
+{
+ if (type != expect) {
+ do_warning("Error: expected type %d (%s) but read %d (%s)",
+ expect, get_event_type(expect),
+ type, get_event_type(type));
+ return -1;
+ }
+
+ if (strcmp(token, expect_tok) != 0) {
+ do_warning("Error: expected '%s' but read '%s'",
+ expect_tok, token);
+ return -1;
+ }
+ return 0;
+}
+
+static int __read_expect_type(struct tep_handle *tep, enum tep_event_type expect,
+ char **tok, int newline_ok)
+{
+ enum tep_event_type type;
+
+ if (newline_ok)
+ type = read_token(tep, tok);
+ else
+ type = read_token_item(tep, tok);
+ return test_type(type, expect);
+}
+
+static int read_expect_type(struct tep_handle *tep, enum tep_event_type expect,
+ char **tok)
+{
+ return __read_expect_type(tep, expect, tok, 1);
+}
+
+static int __read_expected(struct tep_handle *tep, enum tep_event_type expect,
+ const char *str, int newline_ok)
+{
+ enum tep_event_type type;
+ char *token;
+ int ret;
+
+ if (newline_ok)
+ type = read_token(tep, &token);
+ else
+ type = read_token_item(tep, &token);
+
+ ret = test_type_token(type, token, expect, str);
+
+ free_token(token);
+
+ return ret;
+}
+
+static int read_expected(struct tep_handle *tep, enum tep_event_type expect,
+ const char *str)
+{
+ return __read_expected(tep, expect, str, 1);
+}
+
+static int read_expected_item(struct tep_handle *tep, enum tep_event_type expect,
+ const char *str)
+{
+ return __read_expected(tep, expect, str, 0);
+}
+
+static char *event_read_name(struct tep_handle *tep)
+{
+ char *token;
+
+ if (read_expected(tep, TEP_EVENT_ITEM, "name") < 0)
+ return NULL;
+
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ return NULL;
+
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+
+ return token;
+
+ fail:
+ free_token(token);
+ return NULL;
+}
+
+static int event_read_id(struct tep_handle *tep)
+{
+ char *token;
+ int id;
+
+ if (read_expected_item(tep, TEP_EVENT_ITEM, "ID") < 0)
+ return -1;
+
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ return -1;
+
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+
+ id = strtoul(token, NULL, 0);
+ free_token(token);
+ return id;
+
+ fail:
+ free_token(token);
+ return -1;
+}
+
+static int field_is_string(struct tep_format_field *field)
+{
+ if ((field->flags & TEP_FIELD_IS_ARRAY) &&
+ (strstr(field->type, "char") || strstr(field->type, "u8") ||
+ strstr(field->type, "s8")))
+ return 1;
+
+ return 0;
+}
+
+static int field_is_dynamic(struct tep_format_field *field)
+{
+ if (strncmp(field->type, "__data_loc", 10) == 0)
+ return 1;
+
+ return 0;
+}
+
+static int field_is_relative_dynamic(struct tep_format_field *field)
+{
+ if (strncmp(field->type, "__rel_loc", 9) == 0)
+ return 1;
+
+ return 0;
+}
+
+static int field_is_long(struct tep_format_field *field)
+{
+ /* includes long long */
+ if (strstr(field->type, "long"))
+ return 1;
+
+ return 0;
+}
+
+static unsigned int type_size(const char *name)
+{
+ /* This covers all TEP_FIELD_IS_STRING types. */
+ static struct {
+ const char *type;
+ unsigned int size;
+ } table[] = {
+ { "u8", 1 },
+ { "u16", 2 },
+ { "u32", 4 },
+ { "u64", 8 },
+ { "s8", 1 },
+ { "s16", 2 },
+ { "s32", 4 },
+ { "s64", 8 },
+ { "char", 1 },
+ { },
+ };
+ int i;
+
+ for (i = 0; table[i].type; i++) {
+ if (!strcmp(table[i].type, name))
+ return table[i].size;
+ }
+
+ return 0;
+}
+
+static int append(char **buf, const char *delim, const char *str)
+{
+ char *new_buf;
+
+ new_buf = realloc(*buf, strlen(*buf) + strlen(delim) + strlen(str) + 1);
+ if (!new_buf)
+ return -1;
+ strcat(new_buf, delim);
+ strcat(new_buf, str);
+ *buf = new_buf;
+ return 0;
+}
+
+static int event_read_fields(struct tep_handle *tep, struct tep_event *event,
+ struct tep_format_field **fields)
+{
+ struct tep_format_field *field = NULL;
+ enum tep_event_type type;
+ char *token;
+ char *last_token;
+ char *delim = " ";
+ int count = 0;
+ int ret;
+
+ do {
+ unsigned int size_dynamic = 0;
+
+ type = read_token(tep, &token);
+ if (type == TEP_EVENT_NEWLINE) {
+ free_token(token);
+ return count;
+ }
+
+ count++;
+
+ if (test_type_token(type, token, TEP_EVENT_ITEM, "field"))
+ goto fail;
+ free_token(token);
+
+ type = read_token(tep, &token);
+ /*
+ * The ftrace fields may still use the "special" name.
+ * Just ignore it.
+ */
+ if (event->flags & TEP_EVENT_FL_ISFTRACE &&
+ type == TEP_EVENT_ITEM && strcmp(token, "special") == 0) {
+ free_token(token);
+ type = read_token(tep, &token);
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_OP, ":") < 0)
+ goto fail;
+
+ free_token(token);
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+
+ last_token = token;
+
+ field = calloc(1, sizeof(*field));
+ if (!field)
+ goto fail;
+
+ field->event = event;
+
+ /* read the rest of the type */
+ for (;;) {
+ type = read_token(tep, &token);
+ if (type == TEP_EVENT_ITEM ||
+ (type == TEP_EVENT_OP && strcmp(token, "*") == 0) ||
+ /*
+ * Some of the ftrace fields are broken and have
+ * an illegal "." in them.
+ */
+ (event->flags & TEP_EVENT_FL_ISFTRACE &&
+ type == TEP_EVENT_OP && strcmp(token, ".") == 0)) {
+
+ if (strcmp(token, "*") == 0)
+ field->flags |= TEP_FIELD_IS_POINTER;
+
+ if (field->type) {
+ ret = append(&field->type, delim, last_token);
+ free(last_token);
+ if (ret < 0)
+ goto fail;
+ } else
+ field->type = last_token;
+ last_token = token;
+ delim = " ";
+ continue;
+ }
+
+ /* Handle __attribute__((user)) */
+ if ((type == TEP_EVENT_DELIM) &&
+ strcmp("__attribute__", last_token) == 0 &&
+ token[0] == '(') {
+ int depth = 1;
+ int ret;
+
+ ret = append(&field->type, " ", last_token);
+ ret |= append(&field->type, "", "(");
+ if (ret < 0)
+ goto fail;
+
+ delim = " ";
+ while ((type = read_token(tep, &token)) != TEP_EVENT_NONE) {
+ if (type == TEP_EVENT_DELIM) {
+ if (token[0] == '(')
+ depth++;
+ else if (token[0] == ')')
+ depth--;
+ if (!depth)
+ break;
+ ret = append(&field->type, "", token);
+ delim = "";
+ } else {
+ ret = append(&field->type, delim, token);
+ delim = " ";
+ }
+ if (ret < 0)
+ goto fail;
+ free(last_token);
+ last_token = token;
+ }
+ continue;
+ }
+ break;
+ }
+
+ if (!field->type) {
+ do_warning_event(event, "%s: no type found", __func__);
+ goto fail;
+ }
+ field->name = field->alias = last_token;
+
+ if (test_type(type, TEP_EVENT_OP))
+ goto fail;
+
+ if (strcmp(token, "[") == 0) {
+ enum tep_event_type last_type = type;
+ char *brackets = token;
+
+ field->flags |= TEP_FIELD_IS_ARRAY;
+
+ type = read_token(tep, &token);
+
+ if (type == TEP_EVENT_ITEM)
+ field->arraylen = strtoul(token, NULL, 0);
+ else
+ field->arraylen = 0;
+
+ while (strcmp(token, "]") != 0) {
+ const char *delim;
+
+ if (last_type == TEP_EVENT_ITEM &&
+ type == TEP_EVENT_ITEM)
+ delim = " ";
+ else
+ delim = "";
+
+ last_type = type;
+
+ ret = append(&brackets, delim, token);
+ if (ret < 0) {
+ free(brackets);
+ goto fail;
+ }
+ /* We only care about the last token */
+ field->arraylen = strtoul(token, NULL, 0);
+ free_token(token);
+ type = read_token(tep, &token);
+ if (type == TEP_EVENT_NONE) {
+ free(brackets);
+ do_warning_event(event, "failed to find token");
+ goto fail;
+ }
+ }
+
+ free_token(token);
+
+ ret = append(&brackets, "", "]");
+ if (ret < 0) {
+ free(brackets);
+ goto fail_expect;
+ }
+
+ /* add brackets to type */
+
+ type = read_token(tep, &token);
+ /*
+ * If the next token is not an OP, then it is of
+ * the format: type [] item;
+ */
+ if (type == TEP_EVENT_ITEM) {
+ ret = append(&field->type, " ", field->name);
+ if (ret < 0) {
+ free(brackets);
+ goto fail;
+ }
+ ret = append(&field->type, "", brackets);
+
+ size_dynamic = type_size(field->name);
+ free_token(field->name);
+ field->name = field->alias = token;
+ type = read_token(tep, &token);
+ } else {
+ ret = append(&field->type, "", brackets);
+ if (ret < 0) {
+ free(brackets);
+ goto fail;
+ }
+ }
+ free(brackets);
+ }
+
+ if (field_is_string(field))
+ field->flags |= TEP_FIELD_IS_STRING;
+ if (field_is_dynamic(field))
+ field->flags |= TEP_FIELD_IS_DYNAMIC;
+ if (field_is_relative_dynamic(field))
+ field->flags |= TEP_FIELD_IS_DYNAMIC | TEP_FIELD_IS_RELATIVE;
+ if (field_is_long(field))
+ field->flags |= TEP_FIELD_IS_LONG;
+
+ if (test_type_token(type, token, TEP_EVENT_OP, ";"))
+ goto fail;
+ free_token(token);
+
+ if (read_expected(tep, TEP_EVENT_ITEM, "offset") < 0)
+ goto fail_expect;
+
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token))
+ goto fail;
+ field->offset = strtoul(token, NULL, 0);
+ free_token(token);
+
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ goto fail_expect;
+
+ if (read_expected(tep, TEP_EVENT_ITEM, "size") < 0)
+ goto fail_expect;
+
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token))
+ goto fail;
+ field->size = strtoul(token, NULL, 0);
+ free_token(token);
+
+ /*
+ * The old data format before dynamic arrays had dynamic
+ * strings defined with just a 2 byte offset (the length
+ * is defined by the strlen() of the string. To process them
+ * correctly, check if the field is dynamic and has a size of
+ * 2 bytes. All current dynamic events have a size of 4.
+ */
+ if ((field->flags & TEP_FIELD_IS_DYNAMIC) && field->size == 2)
+ field->flags |= TEP_FIELD_IS_STRING | TEP_FIELD_IS_ARRAY;
+
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ goto fail_expect;
+
+ type = read_token(tep, &token);
+ if (type != TEP_EVENT_NEWLINE) {
+ /* newer versions of the kernel have a "signed" type */
+ if (test_type_token(type, token, TEP_EVENT_ITEM, "signed"))
+ goto fail;
+
+ free_token(token);
+
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token))
+ goto fail;
+
+ if (strtoul(token, NULL, 0))
+ field->flags |= TEP_FIELD_IS_SIGNED;
+
+ free_token(token);
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(tep, TEP_EVENT_NEWLINE, &token))
+ goto fail;
+ }
+
+ free_token(token);
+
+ if (field->flags & (TEP_FIELD_IS_ARRAY | TEP_FIELD_IS_DYNAMIC)) {
+ if (field->arraylen)
+ field->elementsize = field->size / field->arraylen;
+ else if (field->flags & TEP_FIELD_IS_DYNAMIC)
+ field->elementsize = size_dynamic;
+ else if (field->flags & TEP_FIELD_IS_STRING)
+ field->elementsize = 1;
+ else if (field->flags & TEP_FIELD_IS_LONG)
+ field->elementsize = event->tep ?
+ event->tep->long_size :
+ sizeof(long);
+ } else
+ field->elementsize = field->size;
+
+ *fields = field;
+ fields = &field->next;
+ field = NULL;
+
+ } while (1);
+
+ return 0;
+
+fail:
+ free_token(token);
+fail_expect:
+ if (field) {
+ free(field->type);
+ free(field->name);
+ free(field);
+ }
+ return -1;
+}
+
+static int event_read_format(struct tep_event *event)
+{
+ char *token;
+ int ret;
+
+ if (read_expected_item(event->tep, TEP_EVENT_ITEM, "format") < 0)
+ return -1;
+
+ if (read_expected(event->tep, TEP_EVENT_OP, ":") < 0)
+ return -1;
+
+ if (read_expect_type(event->tep, TEP_EVENT_NEWLINE, &token))
+ goto fail;
+ free_token(token);
+
+ ret = event_read_fields(event->tep, event, &event->format.common_fields);
+ if (ret < 0)
+ return ret;
+ event->format.nr_common = ret;
+
+ ret = event_read_fields(event->tep, event, &event->format.fields);
+ if (ret < 0)
+ return ret;
+ event->format.nr_fields = ret;
+
+ return 0;
+
+ fail:
+ free_token(token);
+ return -1;
+}
+
+static enum tep_event_type
+process_arg_token(struct tep_event *event, struct tep_print_arg *arg,
+ char **tok, enum tep_event_type type);
+
+static enum tep_event_type
+process_arg(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ enum tep_event_type type;
+ char *token;
+
+ type = read_token(event->tep, &token);
+ *tok = token;
+
+ return process_arg_token(event, arg, tok, type);
+}
+
+static enum tep_event_type
+process_op(struct tep_event *event, struct tep_print_arg *arg, char **tok);
+
+/*
+ * For __print_symbolic() and __print_flags, we need to completely
+ * evaluate the first argument, which defines what to print next.
+ */
+static enum tep_event_type
+process_field_arg(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ enum tep_event_type type;
+
+ type = process_arg(event, arg, tok);
+
+ while (type == TEP_EVENT_OP) {
+ type = process_op(event, arg, tok);
+ }
+
+ return type;
+}
+
+static enum tep_event_type
+process_cond(struct tep_event *event, struct tep_print_arg *top, char **tok)
+{
+ struct tep_print_arg *arg, *left, *right;
+ enum tep_event_type type;
+ char *token = NULL;
+
+ arg = alloc_arg();
+ left = alloc_arg();
+ right = alloc_arg();
+
+ if (!arg || !left || !right) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ /* arg will be freed at out_free */
+ free_arg(left);
+ free_arg(right);
+ goto out_free;
+ }
+
+ arg->type = TEP_PRINT_OP;
+ arg->op.left = left;
+ arg->op.right = right;
+
+ *tok = NULL;
+ type = process_arg(event, left, &token);
+
+ again:
+ if (type == TEP_EVENT_ERROR)
+ goto out_free;
+
+ /* Handle other operations in the arguments */
+ if (type == TEP_EVENT_OP && strcmp(token, ":") != 0) {
+ type = process_op(event, left, &token);
+ goto again;
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_OP, ":"))
+ goto out_free;
+
+ arg->op.op = token;
+
+ type = process_arg(event, right, &token);
+
+ top->op.right = arg;
+
+ *tok = token;
+ return type;
+
+out_free:
+ /* Top may point to itself */
+ top->op.right = NULL;
+ free_token(token);
+ free_arg(arg);
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_array(struct tep_event *event, struct tep_print_arg *top, char **tok)
+{
+ struct tep_print_arg *arg;
+ enum tep_event_type type;
+ char *token = NULL;
+
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ /* '*tok' is set to top->op.op. No need to free. */
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+ }
+
+ *tok = NULL;
+ type = process_arg(event, arg, &token);
+ if (test_type_token(type, token, TEP_EVENT_OP, "]"))
+ goto out_free;
+
+ top->op.right = arg;
+
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+ *tok = token;
+
+ return type;
+
+out_free:
+ free_token(token);
+ free_arg(arg);
+ return TEP_EVENT_ERROR;
+}
+
+static int get_op_prio(char *op)
+{
+ if (strlen(op) == 1) {
+ switch (op[0]) {
+ case '~':
+ case '!':
+ return 4;
+ case '*':
+ case '/':
+ case '%':
+ return 6;
+ case '+':
+ case '-':
+ return 7;
+ /* '>>' and '<<' are 8 */
+ case '<':
+ case '>':
+ return 9;
+ /* '==' and '!=' are 10 */
+ case '&':
+ return 11;
+ case '^':
+ return 12;
+ case '|':
+ return 13;
+ case '?':
+ return 16;
+ default:
+ do_warning("unknown op '%c'", op[0]);
+ return -1;
+ }
+ } else {
+ if (strcmp(op, "++") == 0 ||
+ strcmp(op, "--") == 0) {
+ return 3;
+ } else if (strcmp(op, ">>") == 0 ||
+ strcmp(op, "<<") == 0) {
+ return 8;
+ } else if (strcmp(op, ">=") == 0 ||
+ strcmp(op, "<=") == 0) {
+ return 9;
+ } else if (strcmp(op, "==") == 0 ||
+ strcmp(op, "!=") == 0) {
+ return 10;
+ } else if (strcmp(op, "&&") == 0) {
+ return 14;
+ } else if (strcmp(op, "||") == 0) {
+ return 15;
+ } else {
+ do_warning("unknown op '%s'", op);
+ return -1;
+ }
+ }
+}
+
+static int set_op_prio(struct tep_print_arg *arg)
+{
+
+ /* single ops are the greatest */
+ if (!arg->op.left || arg->op.left->type == TEP_PRINT_NULL)
+ arg->op.prio = 0;
+ else
+ arg->op.prio = get_op_prio(arg->op.op);
+
+ return arg->op.prio;
+}
+
+static int consolidate_op_arg(struct tep_print_arg *arg)
+{
+ unsigned long long val, left, right;
+ int ret = 0;
+
+ if (arg->type != TEP_PRINT_OP)
+ return 0;
+
+ if (arg->op.left)
+ ret = consolidate_op_arg(arg->op.left);
+ if (ret < 0)
+ return ret;
+
+ if (arg->op.right)
+ ret = consolidate_op_arg(arg->op.right);
+ if (ret < 0)
+ return ret;
+
+ if (!arg->op.left || !arg->op.right)
+ return 0;
+
+ if (arg->op.left->type != TEP_PRINT_ATOM ||
+ arg->op.right->type != TEP_PRINT_ATOM)
+ return 0;
+
+ /* Two atoms, we can do the operation now. */
+ left = strtoull(arg->op.left->atom.atom, NULL, 0);
+ right = strtoull(arg->op.right->atom.atom, NULL, 0);
+
+ switch (arg->op.op[0]) {
+ case '>':
+ switch (arg->op.op[1]) {
+ case '>':
+ val = left >> right;
+ break;
+ case '=':
+ val = left >= right;
+ break;
+ default:
+ val = left > right;
+ break;
+ }
+ break;
+ case '<':
+ switch (arg->op.op[1]) {
+ case '<':
+ val = left << right;
+ break;
+ case '=':
+ val = left <= right;
+ break;
+ default:
+ val = left < right;
+ break;
+ }
+ break;
+ case '&':
+ switch (arg->op.op[1]) {
+ case '&':
+ val = left && right;
+ break;
+ default:
+ val = left & right;
+ break;
+ }
+ break;
+ case '|':
+ switch (arg->op.op[1]) {
+ case '|':
+ val = left || right;
+ break;
+ default:
+ val = left | right;
+ break;
+ }
+ break;
+ case '-':
+ val = left - right;
+ break;
+ case '+':
+ val = left + right;
+ break;
+ case '*':
+ val = left * right;
+ break;
+ case '^':
+ val = left ^ right;
+ break;
+ case '/':
+ val = left / right;
+ break;
+ case '%':
+ val = left % right;
+ break;
+ case '=':
+ /* Only '==' is called here */
+ val = left == right;
+ break;
+ case '!':
+ /* Only '!=' is called here. */
+ val = left != right;
+ break;
+ default:
+ return 0;
+ }
+
+ free_arg(arg->op.left);
+ free_arg(arg->op.right);
+
+ arg->type = TEP_PRINT_ATOM;
+ free(arg->op.op);
+ return asprintf(&arg->atom.atom, "%lld", val) < 0 ? -1 : 0;
+}
+
+/* Note, *tok does not get freed, but will most likely be saved */
+static enum tep_event_type
+process_op(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ struct tep_print_arg *left, *right = NULL;
+ enum tep_event_type type;
+ char *token;
+
+ /* the op is passed in via tok */
+ token = *tok;
+
+ if (arg->type == TEP_PRINT_OP && !arg->op.left) {
+ /* handle single op */
+ switch (token[0]) {
+ case '~':
+ case '!':
+ case '+':
+ case '-':
+ break;
+ default:
+ do_warning_event(event, "bad op token %s", token);
+ goto out_free;
+
+ }
+ if (token[1]) {
+ do_warning_event(event, "bad op token %s", token);
+ goto out_free;
+ }
+
+ /* make an empty left */
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ left->type = TEP_PRINT_NULL;
+ arg->op.left = left;
+
+ right = alloc_arg();
+ if (!right)
+ goto out_warn_free;
+
+ arg->op.right = right;
+
+ /* do not free the token, it belongs to an op */
+ *tok = NULL;
+ type = process_arg(event, right, tok);
+
+ } else if (strcmp(token, "?") == 0) {
+
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ /* copy the top arg to the left */
+ *left = *arg;
+
+ arg->type = TEP_PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = left;
+ arg->op.right = NULL;
+ arg->op.prio = 0;
+
+ /* it will set arg->op.right */
+ type = process_cond(event, arg, tok);
+
+ } else if (strcmp(token, ">>") == 0 ||
+ strcmp(token, "<<") == 0 ||
+ strcmp(token, "&") == 0 ||
+ strcmp(token, "|") == 0 ||
+ strcmp(token, "&&") == 0 ||
+ strcmp(token, "||") == 0 ||
+ strcmp(token, "-") == 0 ||
+ strcmp(token, "+") == 0 ||
+ strcmp(token, "*") == 0 ||
+ strcmp(token, "^") == 0 ||
+ strcmp(token, "/") == 0 ||
+ strcmp(token, "%") == 0 ||
+ strcmp(token, "<") == 0 ||
+ strcmp(token, ">") == 0 ||
+ strcmp(token, "<=") == 0 ||
+ strcmp(token, ">=") == 0 ||
+ strcmp(token, "==") == 0 ||
+ strcmp(token, "!=") == 0) {
+
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ /* copy the top arg to the left */
+ *left = *arg;
+
+ arg->type = TEP_PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = left;
+ arg->op.right = NULL;
+
+ if (set_op_prio(arg) == -1) {
+ event->flags |= TEP_EVENT_FL_FAILED;
+ /* arg->op.op (= token) will be freed at out_free */
+ arg->op.op = NULL;
+ goto out_free;
+ }
+
+ type = read_token_item(event->tep, &token);
+ *tok = token;
+
+ /* could just be a type pointer */
+ if ((strcmp(arg->op.op, "*") == 0) &&
+ type == TEP_EVENT_DELIM && (strcmp(token, ")") == 0)) {
+ int ret;
+
+ if (left->type != TEP_PRINT_ATOM) {
+ do_warning_event(event, "bad pointer type");
+ goto out_free;
+ }
+ ret = append(&left->atom.atom, " ", "*");
+ if (ret < 0)
+ goto out_warn_free;
+
+ free(arg->op.op);
+ *arg = *left;
+ free(left);
+
+ return type;
+ }
+
+ right = alloc_arg();
+ if (!right)
+ goto out_warn_free;
+
+ type = process_arg_token(event, right, tok, type);
+ if (type == TEP_EVENT_ERROR) {
+ free_arg(right);
+ /* token was freed in process_arg_token() via *tok */
+ token = NULL;
+ goto out_free;
+ }
+
+ if (right->type == TEP_PRINT_OP &&
+ get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
+ struct tep_print_arg tmp;
+
+ /* rotate ops according to the priority */
+ arg->op.right = right->op.left;
+
+ tmp = *arg;
+ *arg = *right;
+ *right = tmp;
+
+ arg->op.left = right;
+ } else {
+ arg->op.right = right;
+ }
+
+ } else if (strcmp(token, "[") == 0) {
+
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ *left = *arg;
+
+ arg->type = TEP_PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = left;
+ arg->op.right = NULL;
+
+ arg->op.prio = 0;
+
+ /* it will set arg->op.right */
+ type = process_array(event, arg, tok);
+
+ } else {
+ do_warning_event(event, "unknown op '%s'", token);
+ event->flags |= TEP_EVENT_FL_FAILED;
+ /* the arg is now the left side */
+ goto out_free;
+ }
+
+ if (type == TEP_EVENT_OP && strcmp(*tok, ":") != 0) {
+ int prio;
+
+ /* higher prios need to be closer to the root */
+ prio = get_op_prio(*tok);
+
+ if (prio > arg->op.prio)
+ return process_op(event, arg, tok);
+
+ return process_op(event, right, tok);
+ }
+
+ return type;
+
+out_warn_free:
+ do_warning_event(event, "%s: not enough memory!", __func__);
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_entry(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
+ char **tok)
+{
+ enum tep_event_type type;
+ char *field;
+ char *token;
+
+ type = read_token_item(event->tep, &token);
+ /*
+ * Check if REC happens to be surrounded by parenthesis, and
+ * return if that's the case, as "(REC)->" is valid.
+ * but return TEP_EVENT_ITEM.
+ */
+ if (type == TEP_EVENT_DELIM && strcmp(token, ")") == 0) {
+ *tok = token;
+ return TEP_EVENT_ITEM;
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_OP, "->"))
+ goto out_free;
+
+ free_token(token);
+
+ if (read_expect_type(event->tep, TEP_EVENT_ITEM, &token) < 0)
+ goto out_free;
+ field = token;
+
+ arg->type = TEP_PRINT_FIELD;
+ arg->field.name = field;
+
+ arg->field.field = tep_find_any_field(event, arg->field.name);
+
+ if (is_flag_field) {
+ arg->field.field->flags |= TEP_FIELD_IS_FLAG;
+ is_flag_field = 0;
+ } else if (is_symbolic_field) {
+ arg->field.field->flags |= TEP_FIELD_IS_SYMBOLIC;
+ is_symbolic_field = 0;
+ }
+
+ type = read_token(event->tep, &token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static int alloc_and_process_delim(struct tep_event *event, char *next_token,
+ struct tep_print_arg **print_arg)
+{
+ struct tep_print_arg *field;
+ enum tep_event_type type;
+ char *token;
+ int ret = 0;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ type = process_arg(event, field, &token);
+
+ /* We do allow operators */
+ if (type == TEP_EVENT_OP) {
+ type = process_op(event, field, &token);
+
+ if (consolidate_op_arg(field) < 0)
+ type = TEP_EVENT_ERROR;
+
+ if (type == TEP_EVENT_ERROR)
+ goto out_error;
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, next_token))
+ goto out_error;
+
+ *print_arg = field;
+
+out_free_token:
+ free_token(token);
+
+ return ret;
+out_error:
+ errno = EINVAL;
+ ret = -1;
+ free_arg(field);
+ goto out_free_token;
+}
+
+static char *arg_eval (struct tep_print_arg *arg);
+
+static unsigned long long
+eval_type_str(unsigned long long val, const char *type, int pointer)
+{
+ int sign = 0;
+ char *ref;
+ int len;
+
+ len = strlen(type);
+ if (len < 2) {
+ do_warning("invalid type: %s", type);
+ return val;
+ }
+
+ if (pointer) {
+
+ if (type[len-1] != '*') {
+ do_warning("pointer expected with non pointer type");
+ return val;
+ }
+
+ ref = malloc(len);
+ if (!ref) {
+ do_warning("%s: not enough memory!", __func__);
+ return val;
+ }
+ memcpy(ref, type, len);
+
+ /* chop off the " *" */
+ ref[len - 2] = 0;
+
+ val = eval_type_str(val, ref, 0);
+ free(ref);
+ return val;
+ }
+
+ /* check if this is a pointer */
+ if (type[len - 1] == '*')
+ return val;
+
+ /* Try to figure out the arg size*/
+ if (strncmp(type, "struct", 6) == 0)
+ /* all bets off */
+ return val;
+
+ if (strcmp(type, "u8") == 0)
+ return val & 0xff;
+
+ if (strcmp(type, "u16") == 0)
+ return val & 0xffff;
+
+ if (strcmp(type, "u32") == 0)
+ return val & 0xffffffff;
+
+ if (strcmp(type, "u64") == 0 ||
+ strcmp(type, "s64") == 0)
+ return val;
+
+ if (strcmp(type, "s8") == 0)
+ return (unsigned long long)(char)val & 0xff;
+
+ if (strcmp(type, "s16") == 0)
+ return (unsigned long long)(short)val & 0xffff;
+
+ if (strcmp(type, "s32") == 0)
+ return (unsigned long long)(int)val & 0xffffffff;
+
+ if (strncmp(type, "unsigned ", 9) == 0) {
+ sign = 0;
+ type += 9;
+ }
+
+ if (strcmp(type, "char") == 0) {
+ if (sign)
+ return (unsigned long long)(char)val & 0xff;
+ else
+ return val & 0xff;
+ }
+
+ if (strcmp(type, "short") == 0) {
+ if (sign)
+ return (unsigned long long)(short)val & 0xffff;
+ else
+ return val & 0xffff;
+ }
+
+ if (strcmp(type, "int") == 0) {
+ if (sign)
+ return (unsigned long long)(int)val & 0xffffffff;
+ else
+ return val & 0xffffffff;
+ }
+
+ return val;
+}
+
+/*
+ * Try to figure out the type.
+ */
+static unsigned long long
+eval_type(unsigned long long val, struct tep_print_arg *arg, int pointer)
+{
+ if (arg->type != TEP_PRINT_TYPE) {
+ do_warning("expected type argument");
+ return 0;
+ }
+
+ return eval_type_str(val, arg->typecast.type, pointer);
+}
+
+static int arg_num_eval(struct tep_print_arg *arg, long long *val)
+{
+ long long left, right;
+ int ret = 1;
+
+ switch (arg->type) {
+ case TEP_PRINT_ATOM:
+ *val = strtoll(arg->atom.atom, NULL, 0);
+ break;
+ case TEP_PRINT_TYPE:
+ ret = arg_num_eval(arg->typecast.item, val);
+ if (!ret)
+ break;
+ *val = eval_type(*val, arg, 0);
+ break;
+ case TEP_PRINT_OP:
+ switch (arg->op.op[0]) {
+ case '|':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ if (arg->op.op[1])
+ *val = left || right;
+ else
+ *val = left | right;
+ break;
+ case '&':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ if (arg->op.op[1])
+ *val = left && right;
+ else
+ *val = left & right;
+ break;
+ case '<':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ switch (arg->op.op[1]) {
+ case 0:
+ *val = left < right;
+ break;
+ case '<':
+ *val = left << right;
+ break;
+ case '=':
+ *val = left <= right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+ case '>':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ switch (arg->op.op[1]) {
+ case 0:
+ *val = left > right;
+ break;
+ case '>':
+ *val = left >> right;
+ break;
+ case '=':
+ *val = left >= right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+ case '=':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+
+ if (arg->op.op[1] != '=') {
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ } else
+ *val = left == right;
+ break;
+ case '!':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+
+ switch (arg->op.op[1]) {
+ case '=':
+ *val = left != right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+ case '-':
+ /* check for negative */
+ if (arg->op.left->type == TEP_PRINT_NULL)
+ left = 0;
+ else
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ *val = left - right;
+ break;
+ case '+':
+ if (arg->op.left->type == TEP_PRINT_NULL)
+ left = 0;
+ else
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ *val = left + right;
+ break;
+ case '~':
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ *val = ~right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+
+ case TEP_PRINT_NULL:
+ case TEP_PRINT_FIELD ... TEP_PRINT_SYMBOL:
+ case TEP_PRINT_STRING:
+ case TEP_PRINT_BSTRING:
+ case TEP_PRINT_BITMASK:
+ case TEP_PRINT_CPUMASK:
+ default:
+ do_warning("invalid eval type %d", arg->type);
+ ret = 0;
+
+ }
+ return ret;
+}
+
+static char *arg_eval (struct tep_print_arg *arg)
+{
+ long long val;
+ static char buf[24];
+
+ switch (arg->type) {
+ case TEP_PRINT_ATOM:
+ return arg->atom.atom;
+ case TEP_PRINT_TYPE:
+ return arg_eval(arg->typecast.item);
+ case TEP_PRINT_OP:
+ if (!arg_num_eval(arg, &val))
+ break;
+ sprintf(buf, "%lld", val);
+ return buf;
+
+ case TEP_PRINT_NULL:
+ case TEP_PRINT_FIELD ... TEP_PRINT_SYMBOL:
+ case TEP_PRINT_STRING:
+ case TEP_PRINT_BSTRING:
+ case TEP_PRINT_BITMASK:
+ case TEP_PRINT_CPUMASK:
+ default:
+ do_warning("invalid eval type %d", arg->type);
+ break;
+ }
+
+ return NULL;
+}
+
+static enum tep_event_type
+process_fields(struct tep_event *event, struct tep_print_flag_sym **list, char **tok)
+{
+ enum tep_event_type type;
+ struct tep_print_arg *arg = NULL;
+ struct tep_print_flag_sym *field;
+ char *token = *tok;
+ char *value;
+
+ do {
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+ if (test_type_token(type, token, TEP_EVENT_OP, "{"))
+ break;
+
+ arg = alloc_arg();
+ if (!arg)
+ goto out_free;
+
+ free_token(token);
+ type = process_arg(event, arg, &token);
+
+ if (type == TEP_EVENT_OP)
+ type = process_op(event, arg, &token);
+
+ if (type == TEP_EVENT_ERROR)
+ goto out_free;
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
+ goto out_free;
+
+ field = calloc(1, sizeof(*field));
+ if (!field)
+ goto out_free;
+
+ value = arg_eval(arg);
+ if (value == NULL)
+ goto out_free_field;
+ field->value = strdup(value);
+ if (field->value == NULL)
+ goto out_free_field;
+
+ free_arg(arg);
+ arg = alloc_arg();
+ if (!arg)
+ goto out_free;
+
+ free_token(token);
+ type = process_arg(event, arg, &token);
+ if (test_type_token(type, token, TEP_EVENT_OP, "}"))
+ goto out_free_field;
+
+ value = arg_eval(arg);
+ if (value == NULL)
+ goto out_free_field;
+ field->str = strdup(value);
+ if (field->str == NULL)
+ goto out_free_field;
+ free_arg(arg);
+ arg = NULL;
+
+ *list = field;
+ list = &field->next;
+
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+ } while (type == TEP_EVENT_DELIM && strcmp(token, ",") == 0);
+
+ *tok = token;
+ return type;
+
+out_free_field:
+ free_flag_sym(field);
+out_free:
+ free_arg(arg);
+ free_token(token);
+ *tok = NULL;
+
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_flags(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ struct tep_print_arg *field;
+ enum tep_event_type type;
+ char *token = NULL;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = TEP_PRINT_FLAGS;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out_free;
+ }
+
+ type = process_field_arg(event, field, &token);
+
+ /* Handle operations in the first argument */
+ while (type == TEP_EVENT_OP)
+ type = process_op(event, field, &token);
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
+ goto out_free_field;
+ free_token(token);
+
+ arg->flags.field = field;
+
+ type = read_token_item(event->tep, &token);
+ if (event_item_type(type)) {
+ arg->flags.delim = token;
+ type = read_token_item(event->tep, &token);
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
+ goto out_free;
+
+ type = process_fields(event, &arg->flags.flags, &token);
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(event->tep, tok);
+ return type;
+
+out_free_field:
+ free_arg(field);
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_symbols(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ struct tep_print_arg *field;
+ enum tep_event_type type;
+ char *token = NULL;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = TEP_PRINT_SYMBOL;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out_free;
+ }
+
+ type = process_field_arg(event, field, &token);
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
+ goto out_free_field;
+
+ arg->symbol.field = field;
+
+ type = process_fields(event, &arg->symbol.symbols, &token);
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(event->tep, tok);
+ return type;
+
+out_free_field:
+ free_arg(field);
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_hex_common(struct tep_event *event, struct tep_print_arg *arg,
+ char **tok, enum tep_print_arg_type type)
+{
+ memset(arg, 0, sizeof(*arg));
+ arg->type = type;
+
+ if (alloc_and_process_delim(event, ",", &arg->hex.field))
+ goto out;
+
+ if (alloc_and_process_delim(event, ")", &arg->hex.size))
+ goto free_field;
+
+ return read_token_item(event->tep, tok);
+
+free_field:
+ free_arg(arg->hex.field);
+ arg->hex.field = NULL;
+out:
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_hex(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ return process_hex_common(event, arg, tok, TEP_PRINT_HEX);
+}
+
+static enum tep_event_type
+process_hex_str(struct tep_event *event, struct tep_print_arg *arg,
+ char **tok)
+{
+ return process_hex_common(event, arg, tok, TEP_PRINT_HEX_STR);
+}
+
+static enum tep_event_type
+process_int_array(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ memset(arg, 0, sizeof(*arg));
+ arg->type = TEP_PRINT_INT_ARRAY;
+
+ if (alloc_and_process_delim(event, ",", &arg->int_array.field))
+ goto out;
+
+ if (alloc_and_process_delim(event, ",", &arg->int_array.count))
+ goto free_field;
+
+ if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
+ goto free_size;
+
+ return read_token_item(event->tep, tok);
+
+free_size:
+ free_arg(arg->int_array.count);
+ arg->int_array.count = NULL;
+free_field:
+ free_arg(arg->int_array.field);
+ arg->int_array.field = NULL;
+out:
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_dynamic_array(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ struct tep_format_field *field;
+ enum tep_event_type type;
+ char *token;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = TEP_PRINT_DYNAMIC_ARRAY;
+
+ /*
+ * The item within the parenthesis is another field that holds
+ * the index into where the array starts.
+ */
+ type = read_token(event->tep, &token);
+ *tok = token;
+ if (type != TEP_EVENT_ITEM)
+ goto out_free;
+
+ /* Find the field */
+
+ field = tep_find_field(event, token);
+ if (!field)
+ goto out_free;
+
+ arg->dynarray.field = field;
+ arg->dynarray.index = 0;
+
+ if (read_expected(event->tep, TEP_EVENT_DELIM, ")") < 0)
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+ *tok = token;
+ if (type != TEP_EVENT_OP || strcmp(token, "[") != 0)
+ return type;
+
+ free_token(token);
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+ }
+
+ type = process_arg(event, arg, &token);
+ if (type == TEP_EVENT_ERROR)
+ goto out_free_arg;
+
+ if (!test_type_token(type, token, TEP_EVENT_OP, "]"))
+ goto out_free_arg;
+
+ free_token(token);
+ type = read_token_item(event->tep, tok);
+ return type;
+
+ out_free_arg:
+ free_arg(arg);
+ out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_dynamic_array_len(struct tep_event *event, struct tep_print_arg *arg,
+ char **tok)
+{
+ struct tep_format_field *field;
+ enum tep_event_type type;
+ char *token;
+
+ if (read_expect_type(event->tep, TEP_EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = TEP_PRINT_DYNAMIC_ARRAY_LEN;
+
+ /* Find the field */
+ field = tep_find_field(event, token);
+ if (!field)
+ goto out_free;
+
+ arg->dynarray.field = field;
+ arg->dynarray.index = 0;
+
+ if (read_expected(event->tep, TEP_EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ free_token(token);
+ type = read_token(event->tep, &token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_paren(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ struct tep_print_arg *item_arg;
+ enum tep_event_type type;
+ char *token;
+
+ type = process_arg(event, arg, &token);
+
+ if (type == TEP_EVENT_ERROR)
+ goto out_free;
+
+ if (type == TEP_EVENT_OP)
+ type = process_op(event, arg, &token);
+
+ if (type == TEP_EVENT_ERROR)
+ goto out_free;
+
+ /*
+ * If REC is surrounded by parenthesis, the process_arg()
+ * will return TEP_EVENT_ITEM with token == ")". In
+ * this case, we need to continue processing the item
+ * and return.
+ */
+ if (type == TEP_EVENT_ITEM && strcmp(token, ")") == 0) {
+ free_token(token);
+ return process_entry(event, arg, tok);
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+
+ /*
+ * If the next token is an item or another open paren, then
+ * this was a typecast.
+ */
+ if (event_item_type(type) ||
+ (type == TEP_EVENT_DELIM && strcmp(token, "(") == 0)) {
+
+ /* make this a typecast and contine */
+
+ /* prevous must be an atom */
+ if (arg->type != TEP_PRINT_ATOM) {
+ do_warning_event(event, "previous needed to be TEP_PRINT_ATOM");
+ goto out_free;
+ }
+
+ item_arg = alloc_arg();
+ if (!item_arg) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ goto out_free;
+ }
+
+ arg->type = TEP_PRINT_TYPE;
+ arg->typecast.type = arg->atom.atom;
+ arg->typecast.item = item_arg;
+ type = process_arg_token(event, item_arg, &token, type);
+
+ }
+
+ *tok = token;
+ return type;
+
+ out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+
+static enum tep_event_type
+process_str(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ enum tep_event_type type;
+ char *token;
+
+ if (read_expect_type(event->tep, TEP_EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = TEP_PRINT_STRING;
+ arg->string.string = token;
+ arg->string.offset = -1;
+ arg->string.field = NULL;
+
+ if (read_expected(event->tep, TEP_EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ type = read_token(event->tep, &token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_bitmask(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ enum tep_event_type type;
+ char *token;
+
+ if (read_expect_type(event->tep, TEP_EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = TEP_PRINT_BITMASK;
+ arg->bitmask.bitmask = token;
+ arg->bitmask.offset = -1;
+ arg->bitmask.field = NULL;
+
+ if (read_expected(event->tep, TEP_EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ type = read_token(event->tep, &token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_cpumask(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
+ char **tok)
+{
+ enum tep_event_type type = process_bitmask(event, arg, tok);
+ if (type != TEP_EVENT_ERROR)
+ arg->type = TEP_PRINT_CPUMASK;
+
+ return type;
+}
+
+static struct tep_function_handler *
+find_func_handler(struct tep_handle *tep, char *func_name)
+{
+ struct tep_function_handler *func;
+
+ if (!tep)
+ return NULL;
+
+ for (func = tep->func_handlers; func; func = func->next) {
+ if (strcmp(func->name, func_name) == 0)
+ break;
+ }
+
+ return func;
+}
+
+static void remove_func_handler(struct tep_handle *tep, char *func_name)
+{
+ struct tep_function_handler *func;
+ struct tep_function_handler **next;
+
+ next = &tep->func_handlers;
+ while ((func = *next)) {
+ if (strcmp(func->name, func_name) == 0) {
+ *next = func->next;
+ free_func_handle(func);
+ break;
+ }
+ next = &func->next;
+ }
+}
+
+static enum tep_event_type
+process_func_handler(struct tep_event *event, struct tep_function_handler *func,
+ struct tep_print_arg *arg, char **tok)
+{
+ struct tep_print_arg **next_arg;
+ struct tep_print_arg *farg;
+ enum tep_event_type type;
+ char *token;
+ int i;
+
+ arg->type = TEP_PRINT_FUNC;
+ arg->func.func = func;
+
+ *tok = NULL;
+
+ next_arg = &(arg->func.args);
+ for (i = 0; i < func->nr_args; i++) {
+ farg = alloc_arg();
+ if (!farg) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ return TEP_EVENT_ERROR;
+ }
+
+ type = process_arg(event, farg, &token);
+ if (i < (func->nr_args - 1)) {
+ if (type != TEP_EVENT_DELIM || strcmp(token, ",") != 0) {
+ do_warning_event(event,
+ "Error: function '%s()' expects %d arguments but event %s only uses %d",
+ func->name, func->nr_args,
+ event->name, i + 1);
+ goto err;
+ }
+ } else {
+ if (type != TEP_EVENT_DELIM || strcmp(token, ")") != 0) {
+ do_warning_event(event,
+ "Error: function '%s()' only expects %d arguments but event %s has more",
+ func->name, func->nr_args, event->name);
+ goto err;
+ }
+ }
+
+ *next_arg = farg;
+ next_arg = &(farg->next);
+ free_token(token);
+ }
+
+ type = read_token(event->tep, &token);
+ *tok = token;
+
+ return type;
+
+err:
+ free_arg(farg);
+ free_token(token);
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_builtin_expect(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ enum tep_event_type type;
+ char *token = NULL;
+
+ /* Handle __builtin_expect( cond, #) */
+ type = process_arg(event, arg, &token);
+
+ if (type != TEP_EVENT_DELIM || token[0] != ',')
+ goto out_free;
+
+ free_token(token);
+
+ /* We don't care what the second parameter is of the __builtin_expect() */
+ if (read_expect_type(event->tep, TEP_EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ if (read_expected(event->tep, TEP_EVENT_DELIM, ")") < 0)
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(event->tep, tok);
+ return type;
+
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_sizeof(struct tep_event *event, struct tep_print_arg *arg, char **tok)
+{
+ struct tep_format_field *field;
+ enum tep_event_type type;
+ char *token = NULL;
+ bool ok = false;
+ int ret;
+
+ type = read_token_item(event->tep, &token);
+
+ arg->type = TEP_PRINT_ATOM;
+
+ /* We handle some sizeof types */
+ if (strcmp(token, "unsigned") == 0) {
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+
+ if (type == TEP_EVENT_ERROR)
+ goto error;
+
+ if (type != TEP_EVENT_ITEM)
+ ok = true;
+ }
+
+ if (ok || strcmp(token, "int") == 0) {
+ arg->atom.atom = strdup("4");
+
+ } else if (strcmp(token, "long") == 0) {
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+
+ if (token && strcmp(token, "long") == 0) {
+ arg->atom.atom = strdup("8");
+ } else {
+ switch (event->tep->long_size) {
+ case 4:
+ arg->atom.atom = strdup("4");
+ break;
+ case 8:
+ arg->atom.atom = strdup("8");
+ break;
+ default:
+ /* long size not defined yet, fail to parse it */
+ goto error;
+ }
+ /* The token is the next token */
+ ok = true;
+ }
+ } else if (strcmp(token, "REC") == 0) {
+
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+
+ if (test_type_token(type, token, TEP_EVENT_OP, "->"))
+ goto error;
+ free_token(token);
+
+ if (read_expect_type(event->tep, TEP_EVENT_ITEM, &token) < 0)
+ goto error;
+
+ field = tep_find_any_field(event, token);
+ /* Can't handle arrays (yet) */
+ if (!field || field->flags & TEP_FIELD_IS_ARRAY)
+ goto error;
+
+ ret = asprintf(&arg->atom.atom, "%d", field->size);
+ if (ret < 0)
+ goto error;
+
+ } else if (!ok) {
+ goto error;
+ }
+
+ if (!ok) {
+ free_token(token);
+ type = read_token_item(event->tep, tok);
+ }
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
+ goto error;
+
+ free_token(token);
+ return read_token_item(event->tep, tok);
+error:
+ free_token(token);
+ *tok = NULL;
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_function(struct tep_event *event, struct tep_print_arg *arg,
+ char *token, char **tok)
+{
+ struct tep_function_handler *func;
+
+ if (strcmp(token, "__print_flags") == 0) {
+ free_token(token);
+ is_flag_field = 1;
+ return process_flags(event, arg, tok);
+ }
+ if (strcmp(token, "__print_symbolic") == 0) {
+ free_token(token);
+ is_symbolic_field = 1;
+ return process_symbols(event, arg, tok);
+ }
+ if (strcmp(token, "__print_hex") == 0) {
+ free_token(token);
+ return process_hex(event, arg, tok);
+ }
+ if (strcmp(token, "__print_hex_str") == 0) {
+ free_token(token);
+ return process_hex_str(event, arg, tok);
+ }
+ if (strcmp(token, "__print_array") == 0) {
+ free_token(token);
+ return process_int_array(event, arg, tok);
+ }
+ if (strcmp(token, "__get_str") == 0 ||
+ strcmp(token, "__get_rel_str") == 0) {
+ free_token(token);
+ return process_str(event, arg, tok);
+ }
+ if (strcmp(token, "__get_bitmask") == 0 ||
+ strcmp(token, "__get_rel_bitmask") == 0) {
+ free_token(token);
+ return process_bitmask(event, arg, tok);
+ }
+ if (strcmp(token, "__get_cpumask") == 0 ||
+ strcmp(token, "__get_rel_cpumask") == 0) {
+ free_token(token);
+ return process_cpumask(event, arg, tok);
+ }
+ if (strcmp(token, "__get_dynamic_array") == 0 ||
+ strcmp(token, "__get_rel_dynamic_array") == 0 ||
+ strcmp(token, "__get_sockaddr") == 0 ||
+ strcmp(token, "__get_sockaddr_rel") == 0) {
+ free_token(token);
+ return process_dynamic_array(event, arg, tok);
+ }
+ if (strcmp(token, "__get_dynamic_array_len") == 0 ||
+ strcmp(token, "__get_rel_dynamic_array_len") == 0) {
+ free_token(token);
+ return process_dynamic_array_len(event, arg, tok);
+ }
+ if (strcmp(token, "__builtin_expect") == 0) {
+ free_token(token);
+ return process_builtin_expect(event, arg, tok);
+ }
+ if (strcmp(token, "sizeof") == 0) {
+ free_token(token);
+ return process_sizeof(event, arg, tok);
+ }
+
+ func = find_func_handler(event->tep, token);
+ if (func) {
+ free_token(token);
+ return process_func_handler(event, func, arg, tok);
+ }
+
+ do_warning_event(event, "function %s not defined", token);
+ free_token(token);
+ return TEP_EVENT_ERROR;
+}
+
+static enum tep_event_type
+process_arg_token(struct tep_event *event, struct tep_print_arg *arg,
+ char **tok, enum tep_event_type type)
+{
+ char *token;
+ char *atom;
+
+ token = *tok;
+
+ switch (type) {
+ case TEP_EVENT_ITEM:
+ if (strcmp(token, "REC") == 0) {
+ free_token(token);
+ type = process_entry(event, arg, &token);
+ break;
+ }
+ atom = token;
+ /* test the next token */
+ type = read_token_item(event->tep, &token);
+
+ /*
+ * If the next token is a parenthesis, then this
+ * is a function.
+ */
+ if (type == TEP_EVENT_DELIM && strcmp(token, "(") == 0) {
+ free_token(token);
+ token = NULL;
+ /* this will free atom. */
+ type = process_function(event, arg, atom, &token);
+ break;
+ }
+ /* atoms can be more than one token long */
+ while (type == TEP_EVENT_ITEM) {
+ int ret;
+
+ ret = append(&atom, " ", token);
+ if (ret < 0) {
+ free(atom);
+ *tok = NULL;
+ free_token(token);
+ return TEP_EVENT_ERROR;
+ }
+ free_token(token);
+ type = read_token_item(event->tep, &token);
+ }
+
+ arg->type = TEP_PRINT_ATOM;
+ arg->atom.atom = atom;
+ break;
+
+ case TEP_EVENT_DQUOTE:
+ case TEP_EVENT_SQUOTE:
+ arg->type = TEP_PRINT_ATOM;
+ arg->atom.atom = token;
+ type = read_token_item(event->tep, &token);
+ break;
+ case TEP_EVENT_DELIM:
+ if (strcmp(token, "(") == 0) {
+ free_token(token);
+ type = process_paren(event, arg, &token);
+ break;
+ }
+ case TEP_EVENT_OP:
+ /* handle single ops */
+ arg->type = TEP_PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = NULL;
+ type = process_op(event, arg, &token);
+
+ /* On error, the op is freed */
+ if (type == TEP_EVENT_ERROR)
+ arg->op.op = NULL;
+
+ /* return error type if errored */
+ break;
+
+ case TEP_EVENT_ERROR ... TEP_EVENT_NEWLINE:
+ default:
+ do_warning_event(event, "unexpected type %d", type);
+ return TEP_EVENT_ERROR;
+ }
+ *tok = token;
+
+ return type;
+}
+
+static int event_read_print_args(struct tep_event *event, struct tep_print_arg **list)
+{
+ enum tep_event_type type = TEP_EVENT_ERROR;
+ struct tep_print_arg *arg;
+ char *token;
+ int args = 0;
+
+ do {
+ if (type == TEP_EVENT_NEWLINE) {
+ type = read_token_item(event->tep, &token);
+ continue;
+ }
+
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ return -1;
+ }
+
+ type = process_arg(event, arg, &token);
+
+ if (type == TEP_EVENT_ERROR) {
+ free_token(token);
+ free_arg(arg);
+ return -1;
+ }
+
+ *list = arg;
+ args++;
+
+ if (type == TEP_EVENT_OP) {
+ type = process_op(event, arg, &token);
+ free_token(token);
+
+ if (consolidate_op_arg(arg) < 0)
+ type = TEP_EVENT_ERROR;
+
+ if (type == TEP_EVENT_ERROR) {
+ *list = NULL;
+ free_arg(arg);
+ return -1;
+ }
+ list = &arg->next;
+ continue;
+ }
+
+ if (type == TEP_EVENT_DELIM && strcmp(token, ",") == 0) {
+ free_token(token);
+ *list = arg;
+ list = &arg->next;
+ continue;
+ }
+ break;
+ } while (type != TEP_EVENT_NONE);
+
+ if (type != TEP_EVENT_NONE && type != TEP_EVENT_ERROR)
+ free_token(token);
+
+ return args;
+}
+
+static int event_read_print(struct tep_event *event)
+{
+ enum tep_event_type type;
+ char *token;
+ int ret;
+
+ if (read_expected_item(event->tep, TEP_EVENT_ITEM, "print") < 0)
+ return -1;
+
+ if (read_expected(event->tep, TEP_EVENT_ITEM, "fmt") < 0)
+ return -1;
+
+ if (read_expected(event->tep, TEP_EVENT_OP, ":") < 0)
+ return -1;
+
+ if (read_expect_type(event->tep, TEP_EVENT_DQUOTE, &token) < 0)
+ goto fail;
+
+ concat:
+ event->print_fmt.format = token;
+ event->print_fmt.args = NULL;
+
+ /* ok to have no arg */
+ type = read_token_item(event->tep, &token);
+
+ if (type == TEP_EVENT_NONE)
+ return 0;
+
+ /* Handle concatenation of print lines */
+ if (type == TEP_EVENT_DQUOTE) {
+ char *cat;
+
+ if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
+ goto fail;
+ free_token(token);
+ free_token(event->print_fmt.format);
+ event->print_fmt.format = NULL;
+ token = cat;
+ goto concat;
+ }
+
+ if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
+ goto fail;
+
+ free_token(token);
+
+ ret = event_read_print_args(event, &event->print_fmt.args);
+ if (ret < 0)
+ return -1;
+
+ return ret;
+
+ fail:
+ free_token(token);
+ return -1;
+}
+
+/**
+ * tep_find_common_field - return a common field by event
+ * @event: handle for the event
+ * @name: the name of the common field to return
+ *
+ * Returns a common field from the event by the given @name.
+ * This only searches the common fields and not all field.
+ */
+struct tep_format_field *
+tep_find_common_field(struct tep_event *event, const char *name)
+{
+ struct tep_format_field *format;
+
+ for (format = event->format.common_fields;
+ format; format = format->next) {
+ if (strcmp(format->name, name) == 0)
+ break;
+ }
+
+ return format;
+}
+
+/**
+ * tep_find_field - find a non-common field
+ * @event: handle for the event
+ * @name: the name of the non-common field
+ *
+ * Returns a non-common field by the given @name.
+ * This does not search common fields.
+ */
+struct tep_format_field *
+tep_find_field(struct tep_event *event, const char *name)
+{
+ struct tep_format_field *format;
+
+ for (format = event->format.fields;
+ format; format = format->next) {
+ if (strcmp(format->name, name) == 0)
+ break;
+ }
+
+ return format;
+}
+
+/**
+ * tep_find_any_field - find any field by name
+ * @event: handle for the event
+ * @name: the name of the field
+ *
+ * Returns a field by the given @name.
+ * This searches the common field names first, then
+ * the non-common ones if a common one was not found.
+ */
+struct tep_format_field *
+tep_find_any_field(struct tep_event *event, const char *name)
+{
+ struct tep_format_field *format;
+
+ format = tep_find_common_field(event, name);
+ if (format)
+ return format;
+ return tep_find_field(event, name);
+}
+
+/**
+ * tep_read_number - read a number from data
+ * @tep: a handle to the trace event parser context
+ * @ptr: the raw data
+ * @size: the size of the data that holds the number
+ *
+ * Returns the number (converted to host) from the
+ * raw data.
+ */
+unsigned long long tep_read_number(struct tep_handle *tep,
+ const void *ptr, int size)
+{
+ unsigned long long val;
+
+ switch (size) {
+ case 1:
+ return *(unsigned char *)ptr;
+ case 2:
+ return data2host2(tep, *(unsigned short *)ptr);
+ case 4:
+ return data2host4(tep, *(unsigned int *)ptr);
+ case 8:
+ memcpy(&val, (ptr), sizeof(unsigned long long));
+ return data2host8(tep, val);
+ default:
+ /* BUG! */
+ return 0;
+ }
+}
+
+/**
+ * tep_read_number_field - read a number from data
+ * @field: a handle to the field
+ * @data: the raw data to read
+ * @value: the value to place the number in
+ *
+ * Reads raw data according to a field offset and size,
+ * and translates it into @value.
+ *
+ * Returns 0 on success, -1 otherwise.
+ */
+int tep_read_number_field(struct tep_format_field *field, const void *data,
+ unsigned long long *value)
+{
+ if (!field)
+ return -1;
+ switch (field->size) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ *value = tep_read_number(field->event->tep,
+ data + field->offset, field->size);
+ return 0;
+ default:
+ return -1;
+ }
+}
+
+static int get_common_info(struct tep_handle *tep,
+ const char *type, int *offset, int *size)
+{
+ struct tep_event *event;
+ struct tep_format_field *field;
+
+ /*
+ * All events should have the same common elements.
+ * Pick any event to find where the type is;
+ */
+ if (!tep->events) {
+ do_warning("no event_list!");
+ return -1;
+ }
+
+ event = tep->events[0];
+ field = tep_find_common_field(event, type);
+ if (!field)
+ return -1;
+
+ *offset = field->offset;
+ *size = field->size;
+
+ return 0;
+}
+
+static int __parse_common(struct tep_handle *tep, void *data,
+ int *size, int *offset, const char *name)
+{
+ int ret;
+
+ if (!*size) {
+ ret = get_common_info(tep, name, offset, size);
+ if (ret < 0)
+ return ret;
+ }
+ return tep_read_number(tep, data + *offset, *size);
+}
+
+static int trace_parse_common_type(struct tep_handle *tep, void *data)
+{
+ return __parse_common(tep, data,
+ &tep->type_size, &tep->type_offset,
+ "common_type");
+}
+
+static int parse_common_pid(struct tep_handle *tep, void *data)
+{
+ return __parse_common(tep, data,
+ &tep->pid_size, &tep->pid_offset,
+ "common_pid");
+}
+
+static int parse_common_pc(struct tep_handle *tep, void *data)
+{
+ return __parse_common(tep, data,
+ &tep->pc_size, &tep->pc_offset,
+ "common_preempt_count");
+}
+
+static int parse_common_flags(struct tep_handle *tep, void *data)
+{
+ return __parse_common(tep, data,
+ &tep->flags_size, &tep->flags_offset,
+ "common_flags");
+}
+
+static int parse_common_lock_depth(struct tep_handle *tep, void *data)
+{
+ return __parse_common(tep, data,
+ &tep->ld_size, &tep->ld_offset,
+ "common_lock_depth");
+}
+
+static int parse_common_migrate_disable(struct tep_handle *tep, void *data)
+{
+ return __parse_common(tep, data,
+ &tep->ld_size, &tep->ld_offset,
+ "common_migrate_disable");
+}
+
+static int events_id_cmp(const void *a, const void *b);
+
+/**
+ * tep_find_event - find an event by given id
+ * @tep: a handle to the trace event parser context
+ * @id: the id of the event
+ *
+ * Returns an event that has a given @id.
+ */
+struct tep_event *tep_find_event(struct tep_handle *tep, int id)
+{
+ struct tep_event **eventptr;
+ struct tep_event key;
+ struct tep_event *pkey = &key;
+
+ /* Check cache first */
+ if (tep->last_event && tep->last_event->id == id)
+ return tep->last_event;
+
+ key.id = id;
+
+ eventptr = bsearch(&pkey, tep->events, tep->nr_events,
+ sizeof(*tep->events), events_id_cmp);
+
+ if (eventptr) {
+ tep->last_event = *eventptr;
+ return *eventptr;
+ }
+
+ return NULL;
+}
+
+/**
+ * tep_find_event_by_name - find an event by given name
+ * @tep: a handle to the trace event parser context
+ * @sys: the system name to search for
+ * @name: the name of the event to search for
+ *
+ * This returns an event with a given @name and under the system
+ * @sys. If @sys is NULL the first event with @name is returned.
+ */
+struct tep_event *
+tep_find_event_by_name(struct tep_handle *tep,
+ const char *sys, const char *name)
+{
+ struct tep_event *event = NULL;
+ int i;
+
+ if (tep->last_event &&
+ strcmp(tep->last_event->name, name) == 0 &&
+ (!sys || strcmp(tep->last_event->system, sys) == 0))
+ return tep->last_event;
+
+ for (i = 0; i < tep->nr_events; i++) {
+ event = tep->events[i];
+ if (strcmp(event->name, name) == 0) {
+ if (!sys)
+ break;
+ if (strcmp(event->system, sys) == 0)
+ break;
+ }
+ }
+ if (i == tep->nr_events)
+ event = NULL;
+
+ tep->last_event = event;
+ return event;
+}
+
+static unsigned long long test_for_symbol(struct tep_handle *tep,
+ struct tep_print_arg *arg)
+{
+ unsigned long long val = 0;
+ struct func_list *item = tep->funclist;
+ char *func;
+ int i;
+
+ if (isdigit(arg->atom.atom[0]))
+ return 0;
+
+ /* Linear search but only happens once (see after the loop) */
+ for (i = 0; i < (int)tep->func_count; i++) {
+ unsigned long long addr;
+ const char *name;
+
+ if (tep->func_map) {
+ addr = tep->func_map[i].addr;
+ name = tep->func_map[i].func;
+ } else if (item) {
+ addr = item->addr;
+ name = item->func;
+ item = item->next;
+ } else
+ break;
+
+ if (strcmp(arg->atom.atom, name) == 0) {
+ val = addr;
+ break;
+ }
+ }
+
+ /*
+ * This modifies the arg to hardcode the value
+ * and will not loop again.
+ */
+ func = realloc(arg->atom.atom, 32);
+ if (func) {
+ snprintf(func, 32, "%lld", val);
+ arg->atom.atom = func;
+ }
+ return val;
+}
+
+#define TEP_OFFSET_LEN_MASK 0xffff
+#define TEP_LEN_SHIFT 16
+
+static void dynamic_offset(struct tep_handle *tep, int size, void *data,
+ int data_size, unsigned int *offset, unsigned int *len)
+{
+ unsigned long long val;
+ unsigned int o, l;
+
+ /*
+ * The total allocated length of the dynamic array is
+ * stored in the top half of the field and the offset
+ * is in the bottom half of the 32 bit field.
+ */
+ val = tep_read_number(tep, data, size);
+
+ /* Check for overflows */
+ o = (unsigned int)(val & TEP_OFFSET_LEN_MASK);
+
+ /* If there's no length, then just make the length the size of the data */
+ if (size == 2)
+ l = data_size - o;
+ else
+ l = (unsigned int)((val >> TEP_LEN_SHIFT) & TEP_OFFSET_LEN_MASK);
+
+ if (offset)
+ *offset = o > data_size ? 0 : o;
+ if (len)
+ *len = o + l > data_size ? 0 : l;
+}
+
+static inline void dynamic_offset_field(struct tep_handle *tep,
+ struct tep_format_field *field,
+ void *data, int size,
+ unsigned int *offset,
+ unsigned int *len)
+{
+ /* Test for overflow */
+ if (field->offset + field->size > size) {
+ if (offset)
+ *offset = 0;
+ if (len)
+ *len = 0;
+ return;
+ }
+ dynamic_offset(tep, field->size, data + field->offset, size, offset, len);
+ if (field->flags & TEP_FIELD_IS_RELATIVE)
+ *offset += field->offset + field->size;
+}
+
+static bool check_data_offset_size(struct tep_event *event, const char *field_name,
+ int data_size, int field_offset, int field_size)
+{
+ /* Check to make sure the field is within the data */
+ if (field_offset + field_size <= data_size)
+ return false;
+
+ tep_warning("Event '%s' field '%s' goes beyond the size of the event (%d > %d)",
+ event->name, field_name, field_offset + field_size, data_size);
+ return true;
+}
+
+static unsigned long long
+eval_num_arg(void *data, int size, struct tep_event *event, struct tep_print_arg *arg)
+{
+ struct tep_handle *tep = event->tep;
+ unsigned long long val = 0;
+ unsigned long long left, right;
+ struct tep_print_arg *typearg = NULL;
+ struct tep_print_arg *larg;
+ unsigned int offset;
+ unsigned int field_size;
+
+ switch (arg->type) {
+ case TEP_PRINT_NULL:
+ /* ?? */
+ return 0;
+ case TEP_PRINT_ATOM:
+ val = strtoull(arg->atom.atom, NULL, 0);
+ if (!val)
+ val = test_for_symbol(tep, arg);
+ return val;
+ case TEP_PRINT_FIELD:
+ if (!arg->field.field) {
+ arg->field.field = tep_find_any_field(event, arg->field.name);
+ if (!arg->field.field)
+ goto out_warning_field;
+ }
+ if (check_data_offset_size(event, arg->field.name, size,
+ arg->field.field->offset,
+ arg->field.field->size)) {
+ val = 0;
+ break;
+ }
+ /* must be a number */
+ val = tep_read_number(tep, data + arg->field.field->offset,
+ arg->field.field->size);
+ break;
+ case TEP_PRINT_FLAGS:
+ case TEP_PRINT_SYMBOL:
+ case TEP_PRINT_INT_ARRAY:
+ case TEP_PRINT_HEX:
+ case TEP_PRINT_HEX_STR:
+ break;
+ case TEP_PRINT_TYPE:
+ val = eval_num_arg(data, size, event, arg->typecast.item);
+ return eval_type(val, arg, 0);
+ case TEP_PRINT_STRING:
+ case TEP_PRINT_BSTRING:
+ case TEP_PRINT_BITMASK:
+ case TEP_PRINT_CPUMASK:
+ return 0;
+ case TEP_PRINT_FUNC: {
+ struct trace_seq s;
+ trace_seq_init(&s);
+ val = process_defined_func(&s, data, size, event, arg);
+ trace_seq_destroy(&s);
+ return val;
+ }
+ case TEP_PRINT_OP:
+ if (strcmp(arg->op.op, "[") == 0) {
+ /*
+ * Arrays are special, since we don't want
+ * to read the arg as is.
+ */
+ right = eval_num_arg(data, size, event, arg->op.right);
+
+ /* handle typecasts */
+ larg = arg->op.left;
+ while (larg->type == TEP_PRINT_TYPE) {
+ if (!typearg)
+ typearg = larg;
+ larg = larg->typecast.item;
+ }
+
+ /* Default to long size */
+ field_size = tep->long_size;
+
+ switch (larg->type) {
+ case TEP_PRINT_DYNAMIC_ARRAY:
+ dynamic_offset_field(tep, larg->dynarray.field, data,
+ size, &offset, NULL);
+ offset += right;
+ if (larg->dynarray.field->elementsize)
+ field_size = larg->dynarray.field->elementsize;
+ break;
+ case TEP_PRINT_FIELD:
+ if (!larg->field.field) {
+ larg->field.field =
+ tep_find_any_field(event, larg->field.name);
+ if (!larg->field.field) {
+ arg = larg;
+ goto out_warning_field;
+ }
+ }
+ field_size = larg->field.field->elementsize;
+ offset = larg->field.field->offset +
+ right * larg->field.field->elementsize;
+ break;
+ default:
+ goto default_op; /* oops, all bets off */
+ }
+ if (check_data_offset_size(event, arg->field.name, size,
+ offset, field_size)) {
+ val = 0;
+ break;
+ }
+ val = tep_read_number(tep,
+ data + offset, field_size);
+ if (typearg)
+ val = eval_type(val, typearg, 1);
+ break;
+ } else if (strcmp(arg->op.op, "?") == 0) {
+ left = eval_num_arg(data, size, event, arg->op.left);
+ arg = arg->op.right;
+ if (left)
+ val = eval_num_arg(data, size, event, arg->op.left);
+ else
+ val = eval_num_arg(data, size, event, arg->op.right);
+ break;
+ }
+ default_op:
+ left = eval_num_arg(data, size, event, arg->op.left);
+ right = eval_num_arg(data, size, event, arg->op.right);
+ switch (arg->op.op[0]) {
+ case '!':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = !right;
+ break;
+ case '=':
+ val = left != right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case '~':
+ val = ~right;
+ break;
+ case '|':
+ if (arg->op.op[1])
+ val = left || right;
+ else
+ val = left | right;
+ break;
+ case '&':
+ if (arg->op.op[1])
+ val = left && right;
+ else
+ val = left & right;
+ break;
+ case '<':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = left < right;
+ break;
+ case '<':
+ val = left << right;
+ break;
+ case '=':
+ val = left <= right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case '>':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = left > right;
+ break;
+ case '>':
+ val = left >> right;
+ break;
+ case '=':
+ val = left >= right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case '=':
+ if (arg->op.op[1] != '=')
+ goto out_warning_op;
+
+ val = left == right;
+ break;
+ case '-':
+ val = left - right;
+ break;
+ case '+':
+ val = left + right;
+ break;
+ case '/':
+ val = left / right;
+ break;
+ case '%':
+ val = left % right;
+ break;
+ case '*':
+ val = left * right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case TEP_PRINT_DYNAMIC_ARRAY_LEN:
+ dynamic_offset_field(tep, arg->dynarray.field, data, size,
+ NULL, &field_size);
+ val = field_size;
+ break;
+ case TEP_PRINT_DYNAMIC_ARRAY:
+ /* Without [], we pass the address to the dynamic data */
+ dynamic_offset_field(tep, arg->dynarray.field, data, size,
+ &offset, NULL);
+ if (check_data_offset_size(event, arg->field.name, size,
+ offset, 0)) {
+ val = (unsigned long)data;
+ break;
+ }
+ val = (unsigned long)data + offset;
+ break;
+ default: /* not sure what to do there */
+ return 0;
+ }
+ return val;
+
+out_warning_op:
+ do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
+ return 0;
+
+out_warning_field:
+ do_warning_event(event, "%s: field %s not found",
+ __func__, arg->field.name);
+ return 0;
+}
+
+struct flag {
+ const char *name;
+ unsigned long long value;
+};
+
+static const struct flag flags[] = {
+ { "HI_SOFTIRQ", 0 },
+ { "TIMER_SOFTIRQ", 1 },
+ { "NET_TX_SOFTIRQ", 2 },
+ { "NET_RX_SOFTIRQ", 3 },
+ { "BLOCK_SOFTIRQ", 4 },
+ { "IRQ_POLL_SOFTIRQ", 5 },
+ { "TASKLET_SOFTIRQ", 6 },
+ { "SCHED_SOFTIRQ", 7 },
+ { "HRTIMER_SOFTIRQ", 8 },
+ { "RCU_SOFTIRQ", 9 },
+
+ { "HRTIMER_NORESTART", 0 },
+ { "HRTIMER_RESTART", 1 },
+};
+
+static long long eval_flag(const char *flag)
+{
+ int i;
+
+ /*
+ * Some flags in the format files do not get converted.
+ * If the flag is not numeric, see if it is something that
+ * we already know about.
+ */
+ if (isdigit(flag[0]))
+ return strtoull(flag, NULL, 0);
+
+ for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
+ if (strcmp(flags[i].name, flag) == 0)
+ return flags[i].value;
+
+ return -1LL;
+}
+
+static void print_str_to_seq(struct trace_seq *s, const char *format,
+ int len_arg, const char *str)
+{
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+}
+
+static void print_bitmask_to_seq(struct tep_handle *tep,
+ struct trace_seq *s, const char *format,
+ int len_arg, const void *data, int size)
+{
+ int nr_bits = size * 8;
+ int str_size = (nr_bits + 3) / 4;
+ int len = 0;
+ char buf[3];
+ char *str;
+ int index;
+ int i;
+
+ /*
+ * The kernel likes to put in commas every 32 bits, we
+ * can do the same.
+ */
+ str_size += (nr_bits - 1) / 32;
+
+ str = malloc(str_size + 1);
+ if (!str) {
+ do_warning("%s: not enough memory!", __func__);
+ return;
+ }
+ str[str_size] = 0;
+
+ /* Start out with -2 for the two chars per byte */
+ for (i = str_size - 2; i >= 0; i -= 2) {
+ /*
+ * data points to a bit mask of size bytes.
+ * In the kernel, this is an array of long words, thus
+ * endianness is very important.
+ */
+ if (tep->file_bigendian)
+ index = size - (len + 1);
+ else
+ index = len;
+
+ snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
+ memcpy(str + i, buf, 2);
+ len++;
+ if (!(len & 3) && i > 0) {
+ i--;
+ str[i] = ',';
+ }
+ }
+
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+
+ free(str);
+}
+
+#define log10(n) \
+( \
+ n < 10UL ? 0 : \
+ n < 100UL ? 1 : \
+ n < 1000UL ? 2 : \
+ n < 10000UL ? 3 : \
+ n < 100000UL ? 4 : \
+ n < 1000000UL ? 5 : \
+ n < 10000000UL ? 6 : \
+ n < 100000000UL ? 7 : \
+ n < 1000000000UL ? 8 : \
+ 9 \
+)
+
+/* ilog10(0) should be 1 but the 0 simplifies below math */
+#define ilog10(n) \
+( \
+ n == 0 ? 0UL : \
+ n == 1 ? 10UL : \
+ n == 2 ? 100UL : \
+ n == 3 ? 1000UL : \
+ n == 4 ? 10000UL : \
+ n == 5 ? 100000UL : \
+ n == 6 ? 1000000UL : \
+ n == 7 ? 10000000UL : \
+ n == 8 ? 100000000UL : \
+ 1000000000UL \
+)
+
+static unsigned int cpumask_worst_size(unsigned int nr_bits)
+{
+ /*
+ * Printing all the CPUs separated by a comma is a decent bound for the
+ * maximum memory required to print a cpumask (a slightly better bound
+ * is chunks of 2 bits set, i.e. 0-1,3-4,6-7...).
+ *
+ * e.g. for nr_bits=132:
+ * - 131 commas
+ * - 10 * 1 chars for CPUS [0, 9]
+ * - 90 * 2 chars for CPUS [10-99]
+ * - 32 * 3 chars for CPUS [100-131]
+ */
+ unsigned int last_cpu = nr_bits - 1;
+ unsigned int nr_chars = nr_bits - 1;
+ int last_lvl = log10(last_cpu);
+
+ /* All log10 levels before the last one have all values used */
+ for (int lvl = 0; lvl < last_lvl; lvl++) {
+ int nr_values = ilog10(lvl + 1) - ilog10(lvl);
+
+ nr_chars += nr_values * (lvl + 1);
+ }
+ /* Last level is incomplete */
+ nr_chars += (nr_bits - ilog10(last_lvl)) * (last_lvl + 1);
+
+ return nr_chars;
+}
+
+static void print_cpumask_to_seq(struct tep_handle *tep,
+ struct trace_seq *s, const char *format,
+ int len_arg, const void *data, int size)
+{
+ int firstone = -1, firstzero = -1;
+ int nr_bits = size * 8;
+ bool first = true;
+ int str_size = 0;
+ char buf[12]; /* '-' + log10(2^32) + 1 digits + '\0' */
+ char *str;
+ int index;
+ int i;
+
+ str = malloc(cpumask_worst_size(nr_bits) + 1);
+ if (!str) {
+ do_warning("%s: not enough memory!", __func__);
+ return;
+ }
+
+ for (i = 0; i < size; i++) {
+ unsigned char byte;
+ int fmtsize;
+
+ if (tep->file_bigendian)
+ index = size - (i + 1);
+ else
+ index = i;
+
+ /* Byte by byte scan, not the best... */
+ byte = *(((unsigned char *)data) + index);
+more:
+ /* First find a bit set to one...*/
+ if (firstone < 0 && byte) {
+ /*
+ * Set all lower bits, so a later ffz on this same byte
+ * is guaranteed to find a later bit.
+ */
+ firstone = ffs(byte) - 1;
+ byte |= (1 << firstone) - 1;
+ firstone += i * 8;
+ }
+
+ if (firstone < 0)
+ continue;
+
+ /* ...Then find a bit set to zero */
+ if ((~byte) & 0xFF) {
+ /*
+ * Clear all lower bits, so a later ffs on this same
+ * byte is guaranteed to find a later bit.
+ */
+ firstzero = ffs(~byte) - 1;
+ byte &= ~((1 << (firstzero)) - 1);
+ firstzero += i * 8;
+ } else if (i == size - 1) { /* ...Or reach the end of the mask */
+ firstzero = nr_bits;
+ byte = 0;
+ } else {
+ continue;
+ }
+
+ /* We've found a bit set to one, and a later bit set to zero. */
+ if (!first) {
+ str[str_size] = ',';
+ str_size++;
+ }
+ first = false;
+
+ /* It takes {log10(number) + 1} chars to format a number */
+ fmtsize = log10(firstone) + 1;
+ snprintf(buf, fmtsize + 1, "%d", firstone);
+ memcpy(str + str_size, buf, fmtsize);
+ str_size += fmtsize;
+
+ if (firstzero > firstone + 1) {
+ fmtsize = log10(firstzero - 1) + 2;
+ snprintf(buf, fmtsize + 1, "-%d", firstzero - 1);
+ memcpy(str + str_size, buf, fmtsize);
+ str_size += fmtsize;
+ }
+
+ firstzero = firstone = -1;
+ if (byte)
+ goto more;
+ }
+
+ str[str_size] = 0;
+ str_size++;
+
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+
+ free(str);
+}
+
+static void print_str_arg(struct trace_seq *s, void *data, int size,
+ struct tep_event *event, const char *format,
+ int len_arg, struct tep_print_arg *arg)
+{
+ struct tep_handle *tep = event->tep;
+ struct tep_print_flag_sym *flag;
+ struct tep_format_field *field;
+ struct printk_map *printk;
+ unsigned int offset, len;
+ long long val, fval;
+ unsigned long long addr;
+ char *str;
+ unsigned char *hex;
+ int print;
+ int i;
+
+ switch (arg->type) {
+ case TEP_PRINT_NULL:
+ /* ?? */
+ return;
+ case TEP_PRINT_ATOM:
+ print_str_to_seq(s, format, len_arg, arg->atom.atom);
+ return;
+ case TEP_PRINT_FIELD:
+ field = arg->field.field;
+ if (!field) {
+ field = tep_find_any_field(event, arg->field.name);
+ if (!field) {
+ str = arg->field.name;
+ goto out_warning_field;
+ }
+ arg->field.field = field;
+ }
+ /* Zero sized fields, mean the rest of the data */
+ len = field->size ? : size - field->offset;
+
+ /*
+ * Some events pass in pointers. If this is not an array
+ * and the size is the same as long_size, assume that it
+ * is a pointer.
+ */
+ if (!(field->flags & TEP_FIELD_IS_ARRAY) &&
+ field->size == tep->long_size) {
+
+ /* Handle heterogeneous recording and processing
+ * architectures
+ *
+ * CASE I:
+ * Traces recorded on 32-bit devices (32-bit
+ * addressing) and processed on 64-bit devices:
+ * In this case, only 32 bits should be read.
+ *
+ * CASE II:
+ * Traces recorded on 64 bit devices and processed
+ * on 32-bit devices:
+ * In this case, 64 bits must be read.
+ */
+ addr = (tep->long_size == 8) ?
+ *(unsigned long long *)(data + field->offset) :
+ (unsigned long long)*(unsigned int *)(data + field->offset);
+
+ /* Check if it matches a print format */
+ printk = find_printk(tep, addr);
+ if (printk)
+ trace_seq_puts(s, printk->printk);
+ else
+ trace_seq_printf(s, "%llx", addr);
+ break;
+ }
+ str = malloc(len + 1);
+ if (!str) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ return;
+ }
+ memcpy(str, data + field->offset, len);
+ str[len] = 0;
+ print_str_to_seq(s, format, len_arg, str);
+ free(str);
+ break;
+ case TEP_PRINT_FLAGS:
+ val = eval_num_arg(data, size, event, arg->flags.field);
+ print = 0;
+ for (flag = arg->flags.flags; flag; flag = flag->next) {
+ fval = eval_flag(flag->value);
+ if (!val && fval < 0) {
+ print_str_to_seq(s, format, len_arg, flag->str);
+ break;
+ }
+ if (fval > 0 && (val & fval) == fval) {
+ if (print && arg->flags.delim)
+ trace_seq_puts(s, arg->flags.delim);
+ print_str_to_seq(s, format, len_arg, flag->str);
+ print = 1;
+ val &= ~fval;
+ }
+ }
+ if (val) {
+ if (print && arg->flags.delim)
+ trace_seq_puts(s, arg->flags.delim);
+ trace_seq_printf(s, "0x%llx", val);
+ }
+ break;
+ case TEP_PRINT_SYMBOL:
+ val = eval_num_arg(data, size, event, arg->symbol.field);
+ for (flag = arg->symbol.symbols; flag; flag = flag->next) {
+ fval = eval_flag(flag->value);
+ if (val == fval) {
+ print_str_to_seq(s, format, len_arg, flag->str);
+ break;
+ }
+ }
+ if (!flag)
+ trace_seq_printf(s, "0x%llx", val);
+ break;
+ case TEP_PRINT_HEX:
+ case TEP_PRINT_HEX_STR:
+ if (arg->hex.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
+ dynamic_offset_field(tep, arg->hex.field->dynarray.field, data,
+ size, &offset, NULL);
+ hex = data + offset;
+ } else {
+ field = arg->hex.field->field.field;
+ if (!field) {
+ str = arg->hex.field->field.name;
+ field = tep_find_any_field(event, str);
+ if (!field)
+ goto out_warning_field;
+ arg->hex.field->field.field = field;
+ }
+ hex = data + field->offset;
+ }
+ len = eval_num_arg(data, size, event, arg->hex.size);
+ for (i = 0; i < len; i++) {
+ if (i && arg->type == TEP_PRINT_HEX)
+ trace_seq_putc(s, ' ');
+ trace_seq_printf(s, "%02x", hex[i]);
+ }
+ break;
+
+ case TEP_PRINT_INT_ARRAY: {
+ void *num;
+ int el_size;
+
+ if (arg->int_array.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
+ dynamic_offset_field(tep, arg->int_array.field->dynarray.field, data,
+ size, &offset, NULL);
+ num = data + offset;
+ } else {
+ field = arg->int_array.field->field.field;
+ if (!field) {
+ str = arg->int_array.field->field.name;
+ field = tep_find_any_field(event, str);
+ if (!field)
+ goto out_warning_field;
+ arg->int_array.field->field.field = field;
+ }
+ num = data + field->offset;
+ }
+ len = eval_num_arg(data, size, event, arg->int_array.count);
+ el_size = eval_num_arg(data, size, event,
+ arg->int_array.el_size);
+ for (i = 0; i < len; i++) {
+ if (i)
+ trace_seq_putc(s, ' ');
+
+ if (el_size == 1) {
+ trace_seq_printf(s, "%u", *(uint8_t *)num);
+ } else if (el_size == 2) {
+ trace_seq_printf(s, "%u", *(uint16_t *)num);
+ } else if (el_size == 4) {
+ trace_seq_printf(s, "%u", *(uint32_t *)num);
+ } else if (el_size == 8) {
+ trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
+ } else {
+ trace_seq_printf(s, "BAD SIZE:%d 0x%x",
+ el_size, *(uint8_t *)num);
+ el_size = 1;
+ }
+
+ num += el_size;
+ }
+ break;
+ }
+ case TEP_PRINT_TYPE:
+ break;
+ case TEP_PRINT_STRING: {
+ if (!arg->string.field) {
+ arg->string.field = tep_find_any_field(event, arg->string.string);
+ if (!arg->string.field)
+ break;
+ arg->string.offset = arg->string.field->offset;
+ }
+ dynamic_offset_field(tep, arg->string.field, data, size, &offset, &len);
+ /* Do not attempt to save zero length dynamic strings */
+ if (!len)
+ break;
+ print_str_to_seq(s, format, len_arg, ((char *)data) + offset);
+ break;
+ }
+ case TEP_PRINT_BSTRING:
+ print_str_to_seq(s, format, len_arg, arg->string.string);
+ break;
+ case TEP_PRINT_BITMASK: {
+ if (!arg->bitmask.field) {
+ arg->bitmask.field = tep_find_any_field(event, arg->bitmask.bitmask);
+ if (!arg->bitmask.field)
+ break;
+ arg->bitmask.offset = arg->bitmask.field->offset;
+ }
+ dynamic_offset_field(tep, arg->bitmask.field, data, size, &offset, &len);
+ print_bitmask_to_seq(tep, s, format, len_arg,
+ data + offset, len);
+ break;
+ }
+ case TEP_PRINT_CPUMASK: {
+ if (!arg->bitmask.field) {
+ arg->bitmask.field = tep_find_any_field(event, arg->bitmask.bitmask);
+ arg->bitmask.offset = arg->bitmask.field->offset;
+ }
+ if (!arg->bitmask.field)
+ break;
+ dynamic_offset_field(tep, arg->bitmask.field, data, size, &offset, &len);
+ print_cpumask_to_seq(tep, s, format, len_arg,
+ data + offset, len);
+ break;
+ }
+ case TEP_PRINT_OP:
+ /*
+ * The only op for string should be ? :
+ */
+ if (arg->op.op[0] != '?')
+ return;
+ val = eval_num_arg(data, size, event, arg->op.left);
+ if (val)
+ print_str_arg(s, data, size, event,
+ format, len_arg, arg->op.right->op.left);
+ else
+ print_str_arg(s, data, size, event,
+ format, len_arg, arg->op.right->op.right);
+ break;
+ case TEP_PRINT_FUNC:
+ process_defined_func(s, data, size, event, arg);
+ break;
+ default:
+ /* well... */
+ break;
+ }
+
+ return;
+
+out_warning_field:
+ do_warning_event(event, "%s: field %s not found",
+ __func__, arg->field.name);
+}
+
+static unsigned long long
+process_defined_func(struct trace_seq *s, void *data, int size,
+ struct tep_event *event, struct tep_print_arg *arg)
+{
+ struct tep_function_handler *func_handle = arg->func.func;
+ struct func_params *param;
+ unsigned long long *args;
+ unsigned long long ret;
+ struct tep_print_arg *farg;
+ struct trace_seq str;
+ struct save_str {
+ struct save_str *next;
+ char *str;
+ } *strings = NULL, *string;
+ int i;
+
+ if (!func_handle->nr_args) {
+ ret = (*func_handle->func)(s, NULL);
+ goto out;
+ }
+
+ farg = arg->func.args;
+ param = func_handle->params;
+
+ ret = ULLONG_MAX;
+ args = malloc(sizeof(*args) * func_handle->nr_args);
+ if (!args)
+ goto out;
+
+ for (i = 0; i < func_handle->nr_args; i++) {
+ switch (param->type) {
+ case TEP_FUNC_ARG_INT:
+ case TEP_FUNC_ARG_LONG:
+ case TEP_FUNC_ARG_PTR:
+ args[i] = eval_num_arg(data, size, event, farg);
+ break;
+ case TEP_FUNC_ARG_STRING:
+ trace_seq_init(&str);
+ print_str_arg(&str, data, size, event, "%s", -1, farg);
+ trace_seq_terminate(&str);
+ string = malloc(sizeof(*string));
+ if (!string) {
+ do_warning_event(event, "%s(%d): malloc str",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ string->next = strings;
+ string->str = strdup(str.buffer);
+ if (!string->str) {
+ free(string);
+ do_warning_event(event, "%s(%d): malloc str",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ args[i] = (uintptr_t)string->str;
+ strings = string;
+ trace_seq_destroy(&str);
+ break;
+ default:
+ /*
+ * Something went totally wrong, this is not
+ * an input error, something in this code broke.
+ */
+ do_warning_event(event, "Unexpected end of arguments\n");
+ goto out_free;
+ }
+ farg = farg->next;
+ param = param->next;
+ }
+
+ ret = (*func_handle->func)(s, args);
+out_free:
+ free(args);
+ while (strings) {
+ string = strings;
+ strings = string->next;
+ free(string->str);
+ free(string);
+ }
+
+ out:
+ /* TBD : handle return type here */
+ return ret;
+}
+
+static void free_args(struct tep_print_arg *args)
+{
+ struct tep_print_arg *next;
+
+ while (args) {
+ next = args->next;
+
+ free_arg(args);
+ args = next;
+ }
+}
+
+static struct tep_print_arg *make_bprint_args(char *fmt, void *data, int size, struct tep_event *event)
+{
+ struct tep_handle *tep = event->tep;
+ struct tep_format_field *field, *ip_field;
+ struct tep_print_arg *args, *arg, **next;
+ unsigned long long ip, val;
+ char *ptr;
+ void *bptr;
+ int vsize = 0;
+
+ field = tep->bprint_buf_field;
+ ip_field = tep->bprint_ip_field;
+
+ if (!field) {
+ field = tep_find_field(event, "buf");
+ if (!field) {
+ do_warning_event(event, "can't find buffer field for binary printk");
+ return NULL;
+ }
+ ip_field = tep_find_field(event, "ip");
+ if (!ip_field) {
+ do_warning_event(event, "can't find ip field for binary printk");
+ return NULL;
+ }
+ tep->bprint_buf_field = field;
+ tep->bprint_ip_field = ip_field;
+ }
+
+ ip = tep_read_number(tep, data + ip_field->offset, ip_field->size);
+
+ /*
+ * The first arg is the IP pointer.
+ */
+ args = alloc_arg();
+ if (!args) {
+ do_warning_event(event, "%s(%d): not enough memory!",
+ __func__, __LINE__);
+ return NULL;
+ }
+ arg = args;
+ arg->next = NULL;
+ next = &arg->next;
+
+ arg->type = TEP_PRINT_ATOM;
+
+ if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
+ goto out_free;
+
+ /* skip the first "%ps: " */
+ for (ptr = fmt + 5, bptr = data + field->offset;
+ bptr < data + size && *ptr; ptr++) {
+ int ls = 0;
+
+ if (*ptr == '%') {
+ process_again:
+ ptr++;
+ switch (*ptr) {
+ case '%':
+ break;
+ case 'l':
+ ls++;
+ goto process_again;
+ case 'L':
+ ls = 2;
+ goto process_again;
+ case '0' ... '9':
+ goto process_again;
+ case '.':
+ goto process_again;
+ case '#':
+ goto process_again;
+ case 'z':
+ case 'Z':
+ ls = 1;
+ goto process_again;
+ case 'p':
+ ls = 1;
+ if (isalnum(ptr[1])) {
+ ptr++;
+ /* Check for special pointers */
+ switch (*ptr) {
+ case 's':
+ case 'S':
+ case 'x':
+ break;
+ case 'f':
+ case 'F':
+ /*
+ * Pre-5.5 kernels use %pf and
+ * %pF for printing symbols
+ * while kernels since 5.5 use
+ * %pfw for fwnodes. So check
+ * %p[fF] isn't followed by 'w'.
+ */
+ if (ptr[1] != 'w')
+ break;
+ /* fall through */
+ default:
+ /*
+ * Older kernels do not process
+ * dereferenced pointers.
+ * Only process if the pointer
+ * value is a printable.
+ */
+ if (isprint(*(char *)bptr))
+ goto process_string;
+ }
+ }
+ /* fall through */
+ case 'd':
+ case 'u':
+ case 'i':
+ case 'x':
+ case 'X':
+ case 'o':
+ switch (ls) {
+ case 0:
+ vsize = 4;
+ break;
+ case 1:
+ vsize = tep->long_size;
+ break;
+ case 2:
+ vsize = 8;
+ break;
+ default:
+ vsize = ls; /* ? */
+ break;
+ }
+ /* fall through */
+ case '*':
+ if (*ptr == '*')
+ vsize = 4;
+
+ /* the pointers are always 4 bytes aligned */
+ bptr = (void *)(((unsigned long)bptr + 3) &
+ ~3);
+ val = tep_read_number(tep, bptr, vsize);
+ bptr += vsize;
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s(%d): not enough memory!",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ arg->next = NULL;
+ arg->type = TEP_PRINT_ATOM;
+ if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
+ free(arg);
+ goto out_free;
+ }
+ *next = arg;
+ next = &arg->next;
+ /*
+ * The '*' case means that an arg is used as the length.
+ * We need to continue to figure out for what.
+ */
+ if (*ptr == '*')
+ goto process_again;
+
+ break;
+ case 's':
+ process_string:
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s(%d): not enough memory!",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ arg->next = NULL;
+ arg->type = TEP_PRINT_BSTRING;
+ arg->string.string = strdup(bptr);
+ if (!arg->string.string) {
+ free(arg);
+ goto out_free;
+ }
+ bptr += strlen(bptr) + 1;
+ *next = arg;
+ next = &arg->next;
+ default:
+ break;
+ }
+ }
+ }
+
+ return args;
+
+out_free:
+ free_args(args);
+ return NULL;
+}
+
+static char *
+get_bprint_format(void *data, int size __maybe_unused,
+ struct tep_event *event)
+{
+ struct tep_handle *tep = event->tep;
+ unsigned long long addr;
+ struct tep_format_field *field;
+ struct printk_map *printk;
+ char *format;
+
+ field = tep->bprint_fmt_field;
+
+ if (!field) {
+ field = tep_find_field(event, "fmt");
+ if (!field) {
+ do_warning_event(event, "can't find format field for binary printk");
+ return NULL;
+ }
+ tep->bprint_fmt_field = field;
+ }
+
+ addr = tep_read_number(tep, data + field->offset, field->size);
+
+ printk = find_printk(tep, addr);
+ if (!printk) {
+ if (asprintf(&format, "%%ps: (NO FORMAT FOUND at %llx)\n", addr) < 0)
+ return NULL;
+ return format;
+ }
+
+ if (asprintf(&format, "%s: %s", "%ps", printk->printk) < 0)
+ return NULL;
+
+ return format;
+}
+
+static int print_mac_arg(struct trace_seq *s, const char *format,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
+ bool reverse = false;
+ unsigned char *buf;
+ int ret = 0;
+
+ if (arg->type == TEP_PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return 0;
+ }
+
+ /* evaluate if the arg has a type cast */
+ while (arg->type == TEP_PRINT_TYPE)
+ arg = arg->typecast.item;
+
+ if (arg->type != TEP_PRINT_FIELD) {
+ trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
+ arg->type);
+ return 0;
+ }
+
+ if (format[0] == 'm') {
+ fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
+ } else if (format[0] == 'M' && format[1] == 'F') {
+ fmt = "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x";
+ ret++;
+ }
+ if (format[1] == 'R') {
+ reverse = true;
+ ret++;
+ }
+
+ if (!arg->field.field) {
+ arg->field.field =
+ tep_find_any_field(event, arg->field.name);
+ if (!arg->field.field) {
+ do_warning_event(event, "%s: field %s not found",
+ __func__, arg->field.name);
+ return ret;
+ }
+ }
+ if (arg->field.field->size != 6) {
+ trace_seq_printf(s, "INVALIDMAC");
+ return ret;
+ }
+
+ buf = data + arg->field.field->offset;
+ if (reverse)
+ trace_seq_printf(s, fmt, buf[5], buf[4], buf[3], buf[2], buf[1], buf[0]);
+ else
+ trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+
+ return ret;
+}
+
+static int parse_ip4_print_args(struct tep_handle *tep,
+ const char *ptr, bool *reverse)
+{
+ int ret = 0;
+
+ *reverse = false;
+
+ /* hnbl */
+ switch (*ptr) {
+ case 'h':
+ if (tep->file_bigendian)
+ *reverse = false;
+ else
+ *reverse = true;
+ ret++;
+ break;
+ case 'l':
+ *reverse = true;
+ ret++;
+ break;
+ case 'n':
+ case 'b':
+ ret++;
+ /* fall through */
+ default:
+ *reverse = false;
+ break;
+ }
+
+ return ret;
+}
+
+static void print_ip4_addr(struct trace_seq *s, char i, bool reverse, unsigned char *buf)
+{
+ const char *fmt;
+
+ if (i == 'i')
+ fmt = "%03d.%03d.%03d.%03d";
+ else
+ fmt = "%d.%d.%d.%d";
+
+ if (reverse)
+ trace_seq_printf(s, fmt, buf[3], buf[2], buf[1], buf[0]);
+ else
+ trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
+
+}
+
+static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
+{
+ return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
+ (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
+}
+
+static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
+{
+ return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
+}
+
+static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
+{
+ int i, j, range;
+ unsigned char zerolength[8];
+ int longest = 1;
+ int colonpos = -1;
+ uint16_t word;
+ uint8_t hi, lo;
+ bool needcolon = false;
+ bool useIPv4;
+ struct in6_addr in6;
+
+ memcpy(&in6, addr, sizeof(struct in6_addr));
+
+ useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
+
+ memset(zerolength, 0, sizeof(zerolength));
+
+ if (useIPv4)
+ range = 6;
+ else
+ range = 8;
+
+ /* find position of longest 0 run */
+ for (i = 0; i < range; i++) {
+ for (j = i; j < range; j++) {
+ if (in6.s6_addr16[j] != 0)
+ break;
+ zerolength[i]++;
+ }
+ }
+ for (i = 0; i < range; i++) {
+ if (zerolength[i] > longest) {
+ longest = zerolength[i];
+ colonpos = i;
+ }
+ }
+ if (longest == 1) /* don't compress a single 0 */
+ colonpos = -1;
+
+ /* emit address */
+ for (i = 0; i < range; i++) {
+ if (i == colonpos) {
+ if (needcolon || i == 0)
+ trace_seq_printf(s, ":");
+ trace_seq_printf(s, ":");
+ needcolon = false;
+ i += longest - 1;
+ continue;
+ }
+ if (needcolon) {
+ trace_seq_printf(s, ":");
+ needcolon = false;
+ }
+ /* hex u16 without leading 0s */
+ word = ntohs(in6.s6_addr16[i]);
+ hi = word >> 8;
+ lo = word & 0xff;
+ if (hi)
+ trace_seq_printf(s, "%x%02x", hi, lo);
+ else
+ trace_seq_printf(s, "%x", lo);
+
+ needcolon = true;
+ }
+
+ if (useIPv4) {
+ if (needcolon)
+ trace_seq_printf(s, ":");
+ print_ip4_addr(s, 'I', false, &in6.s6_addr[12]);
+ }
+
+ return;
+}
+
+static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
+{
+ int j;
+
+ for (j = 0; j < 16; j += 2) {
+ trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
+ if (i == 'I' && j < 14)
+ trace_seq_printf(s, ":");
+ }
+}
+
+/*
+ * %pi4 print an IPv4 address with leading zeros
+ * %pI4 print an IPv4 address without leading zeros
+ * %pi6 print an IPv6 address without colons
+ * %pI6 print an IPv6 address with colons
+ * %pI6c print an IPv6 address in compressed form with colons
+ * %pISpc print an IP address based on sockaddr; p adds port.
+ */
+static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ bool reverse = false;
+ unsigned char *buf;
+ int ret;
+
+ ret = parse_ip4_print_args(event->tep, ptr, &reverse);
+
+ if (arg->type == TEP_PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return ret;
+ }
+
+ /* evaluate if the arg has a type cast */
+ while (arg->type == TEP_PRINT_TYPE)
+ arg = arg->typecast.item;
+
+ if (arg->type != TEP_PRINT_FIELD) {
+ trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
+ return ret;
+ }
+
+ if (!arg->field.field) {
+ arg->field.field =
+ tep_find_any_field(event, arg->field.name);
+ if (!arg->field.field) {
+ do_warning("%s: field %s not found",
+ __func__, arg->field.name);
+ return ret;
+ }
+ }
+
+ buf = data + arg->field.field->offset;
+
+ if (arg->field.field->size != 4) {
+ trace_seq_printf(s, "INVALIDIPv4");
+ return ret;
+ }
+
+ print_ip4_addr(s, i, reverse, buf);
+ return ret;
+
+}
+
+static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ char have_c = 0;
+ unsigned char *buf;
+ int rc = 0;
+
+ /* pI6c */
+ if (i == 'I' && *ptr == 'c') {
+ have_c = 1;
+ ptr++;
+ rc++;
+ }
+
+ if (arg->type == TEP_PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return rc;
+ }
+
+ /* evaluate if the arg has a type cast */
+ while (arg->type == TEP_PRINT_TYPE)
+ arg = arg->typecast.item;
+
+ if (arg->type != TEP_PRINT_FIELD) {
+ trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
+ return rc;
+ }
+
+ if (!arg->field.field) {
+ arg->field.field =
+ tep_find_any_field(event, arg->field.name);
+ if (!arg->field.field) {
+ do_warning("%s: field %s not found",
+ __func__, arg->field.name);
+ return rc;
+ }
+ }
+
+ buf = data + arg->field.field->offset;
+
+ if (arg->field.field->size != 16) {
+ trace_seq_printf(s, "INVALIDIPv6");
+ return rc;
+ }
+
+ if (have_c)
+ print_ip6c_addr(s, buf);
+ else
+ print_ip6_addr(s, i, buf);
+
+ return rc;
+}
+
+static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ char have_c = 0, have_p = 0;
+ unsigned char *buf;
+ struct sockaddr_storage *sa;
+ bool reverse = false;
+ unsigned int offset;
+ unsigned int len;
+ int rc = 0;
+ int ret;
+
+ /* pISpc */
+ if (i == 'I') {
+ if (*ptr == 'p') {
+ have_p = 1;
+ ptr++;
+ rc++;
+ }
+ if (*ptr == 'c') {
+ have_c = 1;
+ ptr++;
+ rc++;
+ }
+ }
+ ret = parse_ip4_print_args(event->tep, ptr, &reverse);
+ ptr += ret;
+ rc += ret;
+
+ if (arg->type == TEP_PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return rc;
+ }
+
+ /* evaluate if the arg has a type cast */
+ while (arg->type == TEP_PRINT_TYPE)
+ arg = arg->typecast.item;
+
+ if (arg->type == TEP_PRINT_FIELD) {
+
+ if (!arg->field.field) {
+ arg->field.field =
+ tep_find_any_field(event, arg->field.name);
+ if (!arg->field.field) {
+ do_warning("%s: field %s not found",
+ __func__, arg->field.name);
+ return rc;
+ }
+ }
+
+ offset = arg->field.field->offset;
+ len = arg->field.field->size;
+
+ } else if (arg->type == TEP_PRINT_DYNAMIC_ARRAY) {
+
+ dynamic_offset_field(event->tep, arg->dynarray.field, data,
+ size, &offset, &len);
+
+ } else {
+ trace_seq_printf(s, "ARG NOT FIELD NOR DYNAMIC ARRAY BUT TYPE %d",
+ arg->type);
+ return rc;
+ }
+
+ sa = (struct sockaddr_storage *)(data + offset);
+
+ if (sa->ss_family == AF_INET) {
+ struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
+
+ if (len < sizeof(struct sockaddr_in)) {
+ trace_seq_printf(s, "INVALIDIPv4");
+ return rc;
+ }
+
+ print_ip4_addr(s, i, reverse, (unsigned char *) &sa4->sin_addr);
+ if (have_p)
+ trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
+
+
+ } else if (sa->ss_family == AF_INET6) {
+ struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
+
+ if (len < sizeof(struct sockaddr_in6)) {
+ trace_seq_printf(s, "INVALIDIPv6");
+ return rc;
+ }
+
+ if (have_p)
+ trace_seq_printf(s, "[");
+
+ buf = (unsigned char *) &sa6->sin6_addr;
+ if (have_c)
+ print_ip6c_addr(s, buf);
+ else
+ print_ip6_addr(s, i, buf);
+
+ if (have_p)
+ trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
+ }
+
+ return rc;
+}
+
+static int print_ip_arg(struct trace_seq *s, const char *ptr,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ char i = *ptr; /* 'i' or 'I' */
+ int rc = 1;
+
+ /* IP version */
+ ptr++;
+
+ switch (*ptr) {
+ case '4':
+ rc += print_ipv4_arg(s, ptr + 1, i, data, size, event, arg);
+ break;
+ case '6':
+ rc += print_ipv6_arg(s, ptr + 1, i, data, size, event, arg);
+ break;
+ case 'S':
+ rc += print_ipsa_arg(s, ptr + 1, i, data, size, event, arg);
+ break;
+ default:
+ return 0;
+ }
+
+ return rc;
+}
+
+static const int guid_index[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15};
+static const int uuid_index[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
+
+static int print_uuid_arg(struct trace_seq *s, const char *ptr,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ const int *index = uuid_index;
+ char *format = "%02x";
+ int ret = 0;
+ char *buf;
+ int i;
+
+ switch (*(ptr + 1)) {
+ case 'L':
+ format = "%02X";
+ /* fall through */
+ case 'l':
+ index = guid_index;
+ ret++;
+ break;
+ case 'B':
+ format = "%02X";
+ /* fall through */
+ case 'b':
+ ret++;
+ break;
+ }
+
+ if (arg->type == TEP_PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return ret;
+ }
+
+ /* evaluate if the arg has a type cast */
+ while (arg->type == TEP_PRINT_TYPE)
+ arg = arg->typecast.item;
+
+ if (arg->type != TEP_PRINT_FIELD) {
+ trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
+ return ret;
+ }
+
+ if (!arg->field.field) {
+ arg->field.field =
+ tep_find_any_field(event, arg->field.name);
+ if (!arg->field.field) {
+ do_warning("%s: field %s not found",
+ __func__, arg->field.name);
+ return ret;
+ }
+ }
+
+ if (arg->field.field->size != 16) {
+ trace_seq_printf(s, "INVALIDUUID");
+ return ret;
+ }
+
+ buf = data + arg->field.field->offset;
+
+ for (i = 0; i < 16; i++) {
+ trace_seq_printf(s, format, buf[index[i]] & 0xff);
+ switch (i) {
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ trace_seq_printf(s, "-");
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int print_raw_buff_arg(struct trace_seq *s, const char *ptr,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg, int print_len)
+{
+ unsigned int offset, arr_len;
+ int plen = print_len;
+ char *delim = " ";
+ int ret = 0;
+ char *buf;
+ int i;
+
+ switch (*(ptr + 1)) {
+ case 'C':
+ delim = ":";
+ ret++;
+ break;
+ case 'D':
+ delim = "-";
+ ret++;
+ break;
+ case 'N':
+ delim = "";
+ ret++;
+ break;
+ }
+
+ if (arg->type == TEP_PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return ret;
+ }
+
+ if (arg->type != TEP_PRINT_DYNAMIC_ARRAY) {
+ trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
+ return ret;
+ }
+
+ dynamic_offset_field(event->tep, arg->dynarray.field, data, size,
+ &offset, &arr_len);
+ buf = data + offset;
+
+ if (arr_len < plen)
+ plen = arr_len;
+
+ if (plen < 1)
+ return ret;
+
+ trace_seq_printf(s, "%02x", buf[0] & 0xff);
+ for (i = 1; i < plen; i++)
+ trace_seq_printf(s, "%s%02x", delim, buf[i] & 0xff);
+
+ return ret;
+}
+
+static int is_printable_array(char *p, unsigned int len)
+{
+ unsigned int i;
+
+ for (i = 0; i < len && p[i]; i++)
+ if (!isprint(p[i]) && !isspace(p[i]))
+ return 0;
+ return 1;
+}
+
+static void print_field_raw(struct trace_seq *s, void *data, int size,
+ struct tep_format_field *field)
+{
+ struct tep_handle *tep = field->event->tep;
+ unsigned int offset, len, i;
+ unsigned long long val;
+
+ if (field->flags & TEP_FIELD_IS_ARRAY) {
+ if (field->flags & TEP_FIELD_IS_DYNAMIC) {
+ dynamic_offset_field(tep, field, data, size, &offset, &len);
+ } else {
+ offset = field->offset;
+ len = field->size;
+ }
+ if (field->flags & TEP_FIELD_IS_STRING &&
+ is_printable_array(data + offset, len)) {
+ trace_seq_printf(s, "%s", (char *)data + offset);
+ } else {
+ trace_seq_puts(s, "ARRAY[");
+ for (i = 0; i < len; i++) {
+ if (i)
+ trace_seq_puts(s, ", ");
+ trace_seq_printf(s, "%02x",
+ *((unsigned char *)data + offset + i));
+ }
+ trace_seq_putc(s, ']');
+ field->flags &= ~TEP_FIELD_IS_STRING;
+ }
+ } else {
+ val = tep_read_number(tep, data + field->offset,
+ field->size);
+ if (field->flags & TEP_FIELD_IS_POINTER) {
+ trace_seq_printf(s, "0x%llx", val);
+ } else if (field->flags & TEP_FIELD_IS_SIGNED) {
+ switch (field->size) {
+ case 4:
+ /*
+ * If field is long then print it in hex.
+ * A long usually stores pointers.
+ */
+ if (field->flags & TEP_FIELD_IS_LONG)
+ trace_seq_printf(s, "0x%x", (int)val);
+ else
+ trace_seq_printf(s, "%d", (int)val);
+ break;
+ case 2:
+ trace_seq_printf(s, "%2d", (short)val);
+ break;
+ case 1:
+ trace_seq_printf(s, "%1d", (char)val);
+ break;
+ default:
+ trace_seq_printf(s, "%lld", val);
+ }
+ } else {
+ if (field->flags & TEP_FIELD_IS_LONG)
+ trace_seq_printf(s, "0x%llx", val);
+ else
+ trace_seq_printf(s, "%llu", val);
+ }
+ }
+ trace_seq_terminate(s);
+}
+
+static int print_parse_data(struct tep_print_parse *parse, struct trace_seq *s,
+ void *data, int size, struct tep_event *event);
+
+static inline void print_field(struct trace_seq *s, void *data, int size,
+ struct tep_format_field *field,
+ struct tep_print_parse **parse_ptr)
+{
+ struct tep_event *event = field->event;
+ struct tep_print_parse *start_parse;
+ struct tep_print_parse *parse;
+ struct tep_print_arg *arg;
+ bool has_0x = false;
+
+ parse = parse_ptr ? *parse_ptr : event->print_fmt.print_cache;
+
+ if (!parse || event->flags & TEP_EVENT_FL_FAILED)
+ goto out;
+
+ if (field->flags & (TEP_FIELD_IS_ARRAY | TEP_FIELD_IS_STRING))
+ goto out;
+
+ start_parse = parse;
+ do {
+ if (parse->type == PRINT_FMT_STRING) {
+ int len = strlen(parse->format);
+
+ if (len > 1 &&
+ strcmp(parse->format + (len -2), "0x") == 0)
+ has_0x = true;
+ else
+ has_0x = false;
+
+ goto next;
+ }
+
+ arg = parse->arg;
+
+ while (arg && arg->type == TEP_PRINT_TYPE)
+ arg = arg->typecast.item;
+
+ if (!arg || arg->type != TEP_PRINT_FIELD ||
+ arg->field.field != field) {
+ has_0x = false;
+ goto next;
+ }
+
+ if (has_0x)
+ trace_seq_puts(s, "0x");
+
+ print_parse_data(parse, s, data, size, event);
+
+ if (parse_ptr)
+ *parse_ptr = parse->next;
+
+ return;
+
+ next:
+ parse = parse->next ? parse->next :
+ event->print_fmt.print_cache;
+ } while (parse != start_parse);
+
+ out:
+ /* Not found. */
+ print_field_raw(s, data, size, field);
+}
+
+/**
+ * tep_print_field_content - write out the raw content of a field
+ * @s: The trace_seq to write the content into
+ * @data: The payload to extract the field from.
+ * @size: The size of the payload.
+ * @field: The field to extract
+ *
+ * Use @field to find the field content from within @data and write it
+ * in human readable format into @s.
+ *
+ * It will not write anything on error (s->len will not move)
+ */
+void tep_print_field_content(struct trace_seq *s, void *data, int size,
+ struct tep_format_field *field)
+{
+ print_field(s, data, size, field, NULL);
+}
+
+/** DEPRECATED **/
+void tep_print_field(struct trace_seq *s, void *data,
+ struct tep_format_field *field)
+{
+ /* unsafe to use, should pass in size */
+ print_field(s, data, 4096, field, NULL);
+}
+
+static inline void
+print_selected_fields(struct trace_seq *s, void *data, int size,
+ struct tep_event *event,
+ unsigned long long ignore_mask)
+{
+ struct tep_print_parse *parse = event->print_fmt.print_cache;
+ struct tep_format_field *field;
+ unsigned long long field_mask = 1;
+
+ field = event->format.fields;
+ for(; field; field = field->next, field_mask <<= 1) {
+ if (field_mask & ignore_mask)
+ continue;
+
+ trace_seq_printf(s, " %s=", field->name);
+ print_field(s, data, size, field, &parse);
+ }
+}
+
+void tep_print_fields(struct trace_seq *s, void *data,
+ int size, struct tep_event *event)
+{
+ print_selected_fields(s, data, size, event, 0);
+}
+
+/**
+ * tep_record_print_fields - print the field name followed by the
+ * record's field value.
+ * @s: The seq to print to
+ * @record: The record to get the event from
+ * @event: The event that the field is for
+ */
+void tep_record_print_fields(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event)
+{
+ print_selected_fields(s, record->data, record->size, event, 0);
+}
+
+/**
+ * tep_record_print_selected_fields - print the field name followed by the
+ * record's field value for a selected subset of record fields.
+ * @s: The seq to print to
+ * @record: The record to get the event from
+ * @event: The event that the field is for
+ * @select_mask: Bit mask defining the fields to print
+ */
+void tep_record_print_selected_fields(struct trace_seq *s,
+ struct tep_record *record,
+ struct tep_event *event,
+ unsigned long long select_mask)
+{
+ unsigned long long ignore_mask = ~select_mask;
+
+ print_selected_fields(s, record->data, record->size, event, ignore_mask);
+}
+
+static int print_function(struct trace_seq *s, const char *format,
+ void *data, int size, struct tep_event *event,
+ struct tep_print_arg *arg)
+{
+ struct func_map *func;
+ unsigned long long val;
+
+ val = eval_num_arg(data, size, event, arg);
+ func = find_func(event->tep, val);
+ if (func) {
+ trace_seq_puts(s, func->func);
+ if (*format == 'F' || *format == 'S')
+ trace_seq_printf(s, "+0x%llx", val - func->addr);
+ } else {
+ if (event->tep->long_size == 4)
+ trace_seq_printf(s, "0x%lx", (long)val);
+ else
+ trace_seq_printf(s, "0x%llx", (long long)val);
+ }
+
+ return 0;
+}
+
+static int print_arg_pointer(struct trace_seq *s, const char *format, int plen,
+ void *data, int size,
+ struct tep_event *event, struct tep_print_arg *arg)
+{
+ unsigned long long val;
+ int ret = 1;
+
+ if (arg->type == TEP_PRINT_BSTRING) {
+ trace_seq_puts(s, arg->string.string);
+ return 0;
+ }
+ while (*format) {
+ if (*format == 'p') {
+ format++;
+ break;
+ }
+ format++;
+ }
+
+ switch (*format) {
+ case 'F':
+ case 'f':
+ case 'S':
+ case 's':
+ ret += print_function(s, format, data, size, event, arg);
+ break;
+ case 'M':
+ case 'm':
+ ret += print_mac_arg(s, format, data, size, event, arg);
+ break;
+ case 'I':
+ case 'i':
+ ret += print_ip_arg(s, format, data, size, event, arg);
+ break;
+ case 'U':
+ ret += print_uuid_arg(s, format, data, size, event, arg);
+ break;
+ case 'h':
+ ret += print_raw_buff_arg(s, format, data, size, event, arg, plen);
+ break;
+ default:
+ ret = 0;
+ val = eval_num_arg(data, size, event, arg);
+ trace_seq_printf(s, "%p", (void *)(intptr_t)val);
+ break;
+ }
+
+ return ret;
+
+}
+
+static int print_arg_number(struct trace_seq *s, const char *format, int plen,
+ void *data, int size, int ls,
+ struct tep_event *event, struct tep_print_arg *arg)
+{
+ unsigned long long val;
+
+ val = eval_num_arg(data, size, event, arg);
+
+ switch (ls) {
+ case -2:
+ if (plen >= 0)
+ trace_seq_printf(s, format, plen, (char)val);
+ else
+ trace_seq_printf(s, format, (char)val);
+ break;
+ case -1:
+ if (plen >= 0)
+ trace_seq_printf(s, format, plen, (short)val);
+ else
+ trace_seq_printf(s, format, (short)val);
+ break;
+ case 0:
+ if (plen >= 0)
+ trace_seq_printf(s, format, plen, (int)val);
+ else
+ trace_seq_printf(s, format, (int)val);
+ break;
+ case 1:
+ if (plen >= 0)
+ trace_seq_printf(s, format, plen, (long)val);
+ else
+ trace_seq_printf(s, format, (long)val);
+ break;
+ case 2:
+ if (plen >= 0)
+ trace_seq_printf(s, format, plen, (long long)val);
+ else
+ trace_seq_printf(s, format, (long long)val);
+ break;
+ default:
+ do_warning_event(event, "bad count (%d)", ls);
+ event->flags |= TEP_EVENT_FL_FAILED;
+ }
+ return 0;
+}
+
+
+static void print_arg_string(struct trace_seq *s, const char *format, int plen,
+ void *data, int size,
+ struct tep_event *event, struct tep_print_arg *arg)
+{
+ struct trace_seq p;
+
+ /* Use helper trace_seq */
+ trace_seq_init(&p);
+ print_str_arg(&p, data, size, event,
+ format, plen, arg);
+ trace_seq_terminate(&p);
+ trace_seq_puts(s, p.buffer);
+ trace_seq_destroy(&p);
+}
+
+static int parse_arg_format_pointer(const char *format)
+{
+ int ret = 0;
+ int index;
+ int loop;
+
+ switch (*format) {
+ case 'F':
+ case 'S':
+ case 'f':
+ case 's':
+ ret++;
+ break;
+ case 'M':
+ case 'm':
+ /* [mM]R , [mM]F */
+ switch (format[1]) {
+ case 'R':
+ case 'F':
+ ret++;
+ break;
+ }
+ ret++;
+ break;
+ case 'I':
+ case 'i':
+ index = 2;
+ loop = 1;
+ switch (format[1]) {
+ case 'S':
+ /*[S][pfs]*/
+ while (loop) {
+ switch (format[index]) {
+ case 'p':
+ case 'f':
+ case 's':
+ ret++;
+ index++;
+ break;
+ default:
+ loop = 0;
+ break;
+ }
+ }
+ /* fall through */
+ case '4':
+ /* [4S][hnbl] */
+ switch (format[index]) {
+ case 'h':
+ case 'n':
+ case 'l':
+ case 'b':
+ ret++;
+ index++;
+ break;
+ }
+ if (format[1] == '4') {
+ ret++;
+ break;
+ }
+ /* fall through */
+ case '6':
+ /* [6S]c */
+ if (format[index] == 'c')
+ ret++;
+ ret++;
+ break;
+ }
+ ret++;
+ break;
+ case 'U':
+ switch (format[1]) {
+ case 'L':
+ case 'l':
+ case 'B':
+ case 'b':
+ ret++;
+ break;
+ }
+ ret++;
+ break;
+ case 'h':
+ switch (format[1]) {
+ case 'C':
+ case 'D':
+ case 'N':
+ ret++;
+ break;
+ }
+ ret++;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void free_parse_args(struct tep_print_parse *arg)
+{
+ struct tep_print_parse *del;
+
+ while (arg) {
+ del = arg;
+ arg = del->next;
+ free(del->format);
+ free(del);
+ }
+}
+
+static int parse_arg_add(struct tep_print_parse **parse, char *format,
+ enum tep_print_parse_type type,
+ struct tep_print_arg *arg,
+ struct tep_print_arg *len_as_arg,
+ int ls)
+{
+ struct tep_print_parse *parg = NULL;
+
+ parg = calloc(1, sizeof(*parg));
+ if (!parg)
+ goto error;
+ parg->format = strdup(format);
+ if (!parg->format)
+ goto error;
+ parg->type = type;
+ parg->arg = arg;
+ parg->len_as_arg = len_as_arg;
+ parg->ls = ls;
+ *parse = parg;
+ return 0;
+error:
+ if (parg) {
+ free(parg->format);
+ free(parg);
+ }
+ return -1;
+}
+
+static int parse_arg_format(struct tep_print_parse **parse,
+ struct tep_event *event,
+ const char *format, struct tep_print_arg **arg)
+{
+ struct tep_print_arg *len_arg = NULL;
+ char print_format[32];
+ const char *start = format;
+ int ret = 0;
+ int ls = 0;
+ int res;
+ int len;
+
+ format++;
+ ret++;
+ for (; *format; format++) {
+ switch (*format) {
+ case '#':
+ /* FIXME: need to handle properly */
+ break;
+ case 'h':
+ ls--;
+ break;
+ case 'l':
+ ls++;
+ break;
+ case 'L':
+ ls = 2;
+ break;
+ case 'z':
+ case 'Z':
+ ls = 1;
+ break;
+ case '.':
+ case '0' ... '9':
+ case '-':
+ break;
+ case '*':
+ /* The argument is the length. */
+ if (!*arg) {
+ do_warning_event(event, "no argument match");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ goto out_failed;
+ }
+ if (len_arg) {
+ do_warning_event(event, "argument already matched");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ goto out_failed;
+ }
+ len_arg = *arg;
+ *arg = (*arg)->next;
+ break;
+ case 'p':
+ if (!*arg) {
+ do_warning_event(event, "no argument match");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ goto out_failed;
+ }
+ res = parse_arg_format_pointer(format + 1);
+ if (res > 0) {
+ format += res;
+ ret += res;
+ }
+ len = ((unsigned long)format + 1) -
+ (unsigned long)start;
+ /* should never happen */
+ if (len > 31) {
+ do_warning_event(event, "bad format!");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ len = 31;
+ }
+ memcpy(print_format, start, len);
+ print_format[len] = 0;
+
+ parse_arg_add(parse, print_format,
+ PRINT_FMT_ARG_POINTER, *arg, len_arg, ls);
+ *arg = (*arg)->next;
+ ret++;
+ return ret;
+ case 'd':
+ case 'u':
+ case 'i':
+ case 'x':
+ case 'X':
+ case 'o':
+ if (!*arg) {
+ do_warning_event(event, "no argument match");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ goto out_failed;
+ }
+
+ len = ((unsigned long)format + 1) -
+ (unsigned long)start;
+
+ /* should never happen */
+ if (len > 30) {
+ do_warning_event(event, "bad format!");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ len = 31;
+ }
+ memcpy(print_format, start, len);
+ print_format[len] = 0;
+
+ if (event->tep->long_size == 8 && ls == 1 &&
+ sizeof(long) != 8) {
+ char *p;
+
+ /* make %l into %ll */
+ if (ls == 1 && (p = strchr(print_format, 'l')))
+ memmove(p+1, p, strlen(p)+1);
+ ls = 2;
+ }
+ if (ls < -2 || ls > 2) {
+ do_warning_event(event, "bad count (%d)", ls);
+ event->flags |= TEP_EVENT_FL_FAILED;
+ }
+ parse_arg_add(parse, print_format,
+ PRINT_FMT_ARG_DIGIT, *arg, len_arg, ls);
+ *arg = (*arg)->next;
+ ret++;
+ return ret;
+ case 's':
+ if (!*arg) {
+ do_warning_event(event, "no matching argument");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ goto out_failed;
+ }
+
+ len = ((unsigned long)format + 1) -
+ (unsigned long)start;
+
+ /* should never happen */
+ if (len > 31) {
+ do_warning_event(event, "bad format!");
+ event->flags |= TEP_EVENT_FL_FAILED;
+ len = 31;
+ }
+
+ memcpy(print_format, start, len);
+ print_format[len] = 0;
+
+ parse_arg_add(parse, print_format,
+ PRINT_FMT_ARG_STRING, *arg, len_arg, 0);
+ *arg = (*arg)->next;
+ ret++;
+ return ret;
+ default:
+ snprintf(print_format, 32, ">%c<", *format);
+ parse_arg_add(parse, print_format,
+ PRINT_FMT_STRING, NULL, NULL, 0);
+ ret++;
+ return ret;
+ }
+ ret++;
+ }
+
+out_failed:
+ return ret;
+
+}
+
+static int parse_arg_string(struct tep_print_parse **parse, const char *format)
+{
+ struct trace_seq s;
+ int ret = 0;
+
+ trace_seq_init(&s);
+ for (; *format; format++) {
+ if (*format == '\\') {
+ format++;
+ ret++;
+ switch (*format) {
+ case 'n':
+ trace_seq_putc(&s, '\n');
+ break;
+ case 't':
+ trace_seq_putc(&s, '\t');
+ break;
+ case 'r':
+ trace_seq_putc(&s, '\r');
+ break;
+ case '\\':
+ trace_seq_putc(&s, '\\');
+ break;
+ default:
+ trace_seq_putc(&s, *format);
+ break;
+ }
+ } else if (*format == '%') {
+ if (*(format + 1) == '%') {
+ trace_seq_putc(&s, '%');
+ format++;
+ ret++;
+ } else
+ break;
+ } else
+ trace_seq_putc(&s, *format);
+
+ ret++;
+ }
+ trace_seq_terminate(&s);
+ parse_arg_add(parse, s.buffer, PRINT_FMT_STRING, NULL, NULL, 0);
+ trace_seq_destroy(&s);
+
+ return ret;
+}
+
+static struct tep_print_parse *
+parse_args(struct tep_event *event, const char *format, struct tep_print_arg *arg)
+{
+ struct tep_print_parse *parse_ret = NULL;
+ struct tep_print_parse **parse = NULL;
+ int ret;
+ int len;
+
+ len = strlen(format);
+ while (*format) {
+ if (!parse_ret)
+ parse = &parse_ret;
+ if (*format == '%' && *(format + 1) != '%')
+ ret = parse_arg_format(parse, event, format, &arg);
+ else
+ ret = parse_arg_string(parse, format);
+ if (*parse)
+ parse = &((*parse)->next);
+
+ len -= ret;
+ if (len > 0)
+ format += ret;
+ else
+ break;
+ }
+ return parse_ret;
+}
+
+static int print_parse_data(struct tep_print_parse *parse, struct trace_seq *s,
+ void *data, int size, struct tep_event *event)
+{
+ int len_arg;
+
+ if (parse->len_as_arg)
+ len_arg = eval_num_arg(data, size, event, parse->len_as_arg);
+
+ switch (parse->type) {
+ case PRINT_FMT_ARG_DIGIT:
+ print_arg_number(s, parse->format,
+ parse->len_as_arg ? len_arg : -1, data,
+ size, parse->ls, event, parse->arg);
+ break;
+ case PRINT_FMT_ARG_POINTER:
+ print_arg_pointer(s, parse->format,
+ parse->len_as_arg ? len_arg : 1,
+ data, size, event, parse->arg);
+ break;
+ case PRINT_FMT_ARG_STRING:
+ print_arg_string(s, parse->format,
+ parse->len_as_arg ? len_arg : -1,
+ data, size, event, parse->arg);
+ break;
+ case PRINT_FMT_STRING:
+ default:
+ trace_seq_printf(s, "%s", parse->format);
+ /* Return 1 on non field. */
+ return 1;
+ }
+ /* Return 0 on field being processed. */
+ return 0;
+}
+
+static void print_event_cache(struct tep_print_parse *parse, struct trace_seq *s,
+ void *data, int size, struct tep_event *event)
+{
+ while (parse) {
+ print_parse_data(parse, s, data, size, event);
+ parse = parse->next;
+ }
+}
+
+static void pretty_print(struct trace_seq *s, void *data, int size, struct tep_event *event)
+{
+ struct tep_print_parse *parse = event->print_fmt.print_cache;
+ struct tep_print_arg *args = NULL;
+ char *bprint_fmt = NULL;
+
+ if (event->flags & TEP_EVENT_FL_FAILED) {
+ trace_seq_printf(s, "[FAILED TO PARSE]");
+ tep_print_fields(s, data, size, event);
+ return;
+ }
+
+ if (event->flags & TEP_EVENT_FL_ISBPRINT) {
+ bprint_fmt = get_bprint_format(data, size, event);
+ args = make_bprint_args(bprint_fmt, data, size, event);
+ parse = parse_args(event, bprint_fmt, args);
+ }
+
+ print_event_cache(parse, s, data, size, event);
+
+ if (event->flags & TEP_EVENT_FL_ISBPRINT) {
+ free_parse_args(parse);
+ free_args(args);
+ free(bprint_fmt);
+ }
+}
+
+/*
+ * This parses out the Latency format (interrupts disabled,
+ * need rescheduling, in hard/soft interrupt, preempt count
+ * and lock depth) and places it into the trace_seq.
+ */
+static void data_latency_format(struct tep_handle *tep, struct trace_seq *s,
+ char *format, struct tep_record *record)
+{
+ static int check_lock_depth = 1;
+ static int check_migrate_disable = 1;
+ static int lock_depth_exists;
+ static int migrate_disable_exists;
+ unsigned int lat_flags;
+ struct trace_seq sq;
+ unsigned int pc;
+ int lock_depth = 0;
+ int migrate_disable = 0;
+ int hardirq;
+ int softirq;
+ void *data = record->data;
+
+ trace_seq_init(&sq);
+ lat_flags = parse_common_flags(tep, data);
+ pc = parse_common_pc(tep, data);
+ /* lock_depth may not always exist */
+ if (lock_depth_exists)
+ lock_depth = parse_common_lock_depth(tep, data);
+ else if (check_lock_depth) {
+ lock_depth = parse_common_lock_depth(tep, data);
+ if (lock_depth < 0)
+ check_lock_depth = 0;
+ else
+ lock_depth_exists = 1;
+ }
+
+ /* migrate_disable may not always exist */
+ if (migrate_disable_exists)
+ migrate_disable = parse_common_migrate_disable(tep, data);
+ else if (check_migrate_disable) {
+ migrate_disable = parse_common_migrate_disable(tep, data);
+ if (migrate_disable < 0)
+ check_migrate_disable = 0;
+ else
+ migrate_disable_exists = 1;
+ }
+
+ hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
+ softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
+
+ trace_seq_printf(&sq, "%c%c%c",
+ (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
+ (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
+ 'X' : '.',
+ (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
+ 'N' : '.',
+ (hardirq && softirq) ? 'H' :
+ hardirq ? 'h' : softirq ? 's' : '.');
+
+ if (pc & 0xf)
+ trace_seq_printf(&sq, "%x", pc & 0xf);
+ else
+ trace_seq_printf(&sq, ".");
+
+ if (pc & 0xf0)
+ trace_seq_printf(&sq, "%x", pc >> 4);
+ else
+ trace_seq_printf(&sq, ".");
+
+ if (migrate_disable_exists) {
+ if (migrate_disable < 0)
+ trace_seq_printf(&sq, ".");
+ else
+ trace_seq_printf(&sq, "%d", migrate_disable);
+ }
+
+ if (lock_depth_exists) {
+ if (lock_depth < 0)
+ trace_seq_printf(&sq, ".");
+ else
+ trace_seq_printf(&sq, "%d", lock_depth);
+ }
+
+ if (sq.state == TRACE_SEQ__MEM_ALLOC_FAILED) {
+ s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
+ return;
+ }
+
+ trace_seq_terminate(&sq);
+ trace_seq_puts(s, sq.buffer);
+ trace_seq_destroy(&sq);
+ trace_seq_terminate(s);
+}
+
+/**
+ * tep_data_type - parse out the given event type
+ * @tep: a handle to the trace event parser context
+ * @rec: the record to read from
+ *
+ * This returns the event id from the @rec.
+ */
+int tep_data_type(struct tep_handle *tep, struct tep_record *rec)
+{
+ return trace_parse_common_type(tep, rec->data);
+}
+
+/**
+ * tep_data_pid - parse the PID from record
+ * @tep: a handle to the trace event parser context
+ * @rec: the record to parse
+ *
+ * This returns the PID from a record.
+ */
+int tep_data_pid(struct tep_handle *tep, struct tep_record *rec)
+{
+ return parse_common_pid(tep, rec->data);
+}
+
+/**
+ * tep_data_preempt_count - parse the preempt count from the record
+ * @tep: a handle to the trace event parser context
+ * @rec: the record to parse
+ *
+ * This returns the preempt count from a record.
+ */
+int tep_data_preempt_count(struct tep_handle *tep, struct tep_record *rec)
+{
+ return parse_common_pc(tep, rec->data);
+}
+
+/**
+ * tep_data_flags - parse the latency flags from the record
+ * @tep: a handle to the trace event parser context
+ * @rec: the record to parse
+ *
+ * This returns the latency flags from a record.
+ *
+ * Use trace_flag_type enum for the flags (see event-parse.h).
+ */
+int tep_data_flags(struct tep_handle *tep, struct tep_record *rec)
+{
+ return parse_common_flags(tep, rec->data);
+}
+
+/**
+ * tep_data_comm_from_pid - return the command line from PID
+ * @tep: a handle to the trace event parser context
+ * @pid: the PID of the task to search for
+ *
+ * This returns a pointer to the command line that has the given
+ * @pid.
+ */
+const char *tep_data_comm_from_pid(struct tep_handle *tep, int pid)
+{
+ const char *comm;
+
+ comm = find_cmdline(tep, pid);
+ return comm;
+}
+
+static struct tep_cmdline *
+pid_from_cmdlist(struct tep_handle *tep, const char *comm, struct tep_cmdline *next)
+{
+ struct cmdline_list *cmdlist = (struct cmdline_list *)next;
+
+ if (cmdlist)
+ cmdlist = cmdlist->next;
+ else
+ cmdlist = tep->cmdlist;
+
+ while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
+ cmdlist = cmdlist->next;
+
+ return (struct tep_cmdline *)cmdlist;
+}
+
+/**
+ * tep_data_pid_from_comm - return the pid from a given comm
+ * @tep: a handle to the trace event parser context
+ * @comm: the cmdline to find the pid from
+ * @next: the cmdline structure to find the next comm
+ *
+ * This returns the cmdline structure that holds a pid for a given
+ * comm, or NULL if none found. As there may be more than one pid for
+ * a given comm, the result of this call can be passed back into
+ * a recurring call in the @next parameter, and then it will find the
+ * next pid.
+ * Also, it does a linear search, so it may be slow.
+ */
+struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *tep, const char *comm,
+ struct tep_cmdline *next)
+{
+ struct tep_cmdline *cmdline;
+
+ /*
+ * If the cmdlines have not been converted yet, then use
+ * the list.
+ */
+ if (!tep->cmdlines)
+ return pid_from_cmdlist(tep, comm, next);
+
+ if (next) {
+ /*
+ * The next pointer could have been still from
+ * a previous call before cmdlines were created
+ */
+ if (next < tep->cmdlines ||
+ next >= tep->cmdlines + tep->cmdline_count)
+ next = NULL;
+ else
+ cmdline = next++;
+ }
+
+ if (!next)
+ cmdline = tep->cmdlines;
+
+ while (cmdline < tep->cmdlines + tep->cmdline_count) {
+ if (strcmp(cmdline->comm, comm) == 0)
+ return cmdline;
+ cmdline++;
+ }
+ return NULL;
+}
+
+/**
+ * tep_cmdline_pid - return the pid associated to a given cmdline
+ * @tep: a handle to the trace event parser context
+ * @cmdline: The cmdline structure to get the pid from
+ *
+ * Returns the pid for a give cmdline. If @cmdline is NULL, then
+ * -1 is returned.
+ */
+int tep_cmdline_pid(struct tep_handle *tep, struct tep_cmdline *cmdline)
+{
+ struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
+
+ if (!cmdline)
+ return -1;
+
+ /*
+ * If cmdlines have not been created yet, or cmdline is
+ * not part of the array, then treat it as a cmdlist instead.
+ */
+ if (!tep->cmdlines ||
+ cmdline < tep->cmdlines ||
+ cmdline >= tep->cmdlines + tep->cmdline_count)
+ return cmdlist->pid;
+
+ return cmdline->pid;
+}
+
+/*
+ * This parses the raw @data using the given @event information and
+ * writes the print format into the trace_seq.
+ */
+static void print_event_info(struct trace_seq *s, char *format, bool raw,
+ struct tep_event *event, struct tep_record *record)
+{
+ int print_pretty = 1;
+
+ if (raw || (event->flags & TEP_EVENT_FL_PRINTRAW))
+ tep_print_fields(s, record->data, record->size, event);
+ else {
+
+ if (event->handler && !(event->flags & TEP_EVENT_FL_NOHANDLE))
+ print_pretty = event->handler(s, record, event,
+ event->context);
+
+ if (print_pretty)
+ pretty_print(s, record->data, record->size, event);
+ }
+
+ trace_seq_terminate(s);
+}
+
+/**
+ * tep_find_event_by_record - return the event from a given record
+ * @tep: a handle to the trace event parser context
+ * @record: The record to get the event from
+ *
+ * Returns the associated event for a given record, or NULL if non is
+ * is found.
+ */
+struct tep_event *
+tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record)
+{
+ int type;
+
+ if (record->size < 0) {
+ do_warning("ug! negative record size %d", record->size);
+ return NULL;
+ }
+
+ type = trace_parse_common_type(tep, record->data);
+
+ return tep_find_event(tep, type);
+}
+
+/*
+ * Writes the timestamp of the record into @s. Time divisor and precision can be
+ * specified as part of printf @format string. Example:
+ * "%3.1000d" - divide the time by 1000 and print the first 3 digits
+ * before the dot. Thus, the timestamp "123456000" will be printed as
+ * "123.456"
+ */
+static void print_event_time(struct tep_handle *tep, struct trace_seq *s,
+ char *format, struct tep_event *event,
+ struct tep_record *record)
+{
+ unsigned long long time;
+ char *divstr;
+ int prec = 0, pr;
+ int div = 0;
+ int p10 = 1;
+
+ if (isdigit(*(format + 1)))
+ prec = atoi(format + 1);
+ divstr = strchr(format, '.');
+ if (divstr && isdigit(*(divstr + 1)))
+ div = atoi(divstr + 1);
+ time = record->ts;
+ if (div) {
+ time += div / 2;
+ time /= div;
+ }
+ pr = prec;
+ while (pr--)
+ p10 *= 10;
+
+ if (p10 > 1)
+ trace_seq_printf(s, "%5llu.%0*llu", time / p10, prec, time % p10);
+ else
+ trace_seq_printf(s, "%12llu", time);
+}
+
+struct print_event_type {
+ enum {
+ EVENT_TYPE_INT = 1,
+ EVENT_TYPE_STRING,
+ EVENT_TYPE_UNKNOWN,
+ } type;
+ char format[32];
+};
+
+static void print_string(struct tep_handle *tep, struct trace_seq *s,
+ struct tep_record *record, struct tep_event *event,
+ const char *arg, struct print_event_type *type)
+{
+ const char *comm;
+ int pid;
+
+ if (strncmp(arg, TEP_PRINT_LATENCY, strlen(TEP_PRINT_LATENCY)) == 0) {
+ data_latency_format(tep, s, type->format, record);
+ } else if (strncmp(arg, TEP_PRINT_COMM, strlen(TEP_PRINT_COMM)) == 0) {
+ pid = parse_common_pid(tep, record->data);
+ comm = find_cmdline(tep, pid);
+ trace_seq_printf(s, type->format, comm);
+ } else if (strncmp(arg, TEP_PRINT_INFO_RAW, strlen(TEP_PRINT_INFO_RAW)) == 0) {
+ print_event_info(s, type->format, true, event, record);
+ } else if (strncmp(arg, TEP_PRINT_INFO, strlen(TEP_PRINT_INFO)) == 0) {
+ print_event_info(s, type->format, false, event, record);
+ } else if (strncmp(arg, TEP_PRINT_NAME, strlen(TEP_PRINT_NAME)) == 0) {
+ trace_seq_printf(s, type->format, event->name);
+ } else {
+ trace_seq_printf(s, "[UNKNOWN TEP TYPE %s]", arg);
+ }
+
+}
+
+static void print_int(struct tep_handle *tep, struct trace_seq *s,
+ struct tep_record *record, struct tep_event *event,
+ int arg, struct print_event_type *type)
+{
+ int param;
+
+ switch (arg) {
+ case TEP_PRINT_CPU:
+ param = record->cpu;
+ break;
+ case TEP_PRINT_PID:
+ param = parse_common_pid(tep, record->data);
+ break;
+ case TEP_PRINT_TIME:
+ return print_event_time(tep, s, type->format, event, record);
+ default:
+ return;
+ }
+ trace_seq_printf(s, type->format, param);
+}
+
+static int tep_print_event_param_type(char *format,
+ struct print_event_type *type)
+{
+ char *str = format + 1;
+ int i = 1;
+
+ type->type = EVENT_TYPE_UNKNOWN;
+ while (*str) {
+ switch (*str) {
+ case 'd':
+ case 'u':
+ case 'i':
+ case 'x':
+ case 'X':
+ case 'o':
+ type->type = EVENT_TYPE_INT;
+ break;
+ case 's':
+ type->type = EVENT_TYPE_STRING;
+ break;
+ }
+ str++;
+ i++;
+ if (type->type != EVENT_TYPE_UNKNOWN)
+ break;
+ }
+ memset(type->format, 0, 32);
+ memcpy(type->format, format, i < 32 ? i : 31);
+ return i;
+}
+
+/**
+ * tep_print_event - Write various event information
+ * @tep: a handle to the trace event parser context
+ * @s: the trace_seq to write to
+ * @record: The record to get the event from
+ * @format: a printf format string. Supported event fileds:
+ * TEP_PRINT_PID, "%d" - event PID
+ * TEP_PRINT_CPU, "%d" - event CPU
+ * TEP_PRINT_COMM, "%s" - event command string
+ * TEP_PRINT_NAME, "%s" - event name
+ * TEP_PRINT_LATENCY, "%s" - event latency
+ * TEP_PRINT_TIME, %d - event time stamp. A divisor and precision
+ * can be specified as part of this format string:
+ * "%precision.divisord". Example:
+ * "%3.1000d" - divide the time by 1000 and print the first
+ * 3 digits before the dot. Thus, the time stamp
+ * "123456000" will be printed as "123.456"
+ * TEP_PRINT_INFO, "%s" - event information. If any width is specified in
+ * the format string, the event information will be printed
+ * in raw format.
+ * Writes the specified event information into @s.
+ */
+void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
+ struct tep_record *record, const char *fmt, ...)
+{
+ struct print_event_type type;
+ struct tep_event *event;
+ char *current;
+ char *format;
+ char *str;
+ int offset;
+ va_list args;
+
+ event = tep_find_event_by_record(tep, record);
+ if (!event) {
+ trace_seq_printf(s, "[UNKNOWN EVENT]");
+ return;
+ }
+
+ str = current = format = strdup(fmt);
+ if (!format)
+ return;
+
+ va_start(args, fmt);
+ while (*current) {
+ current = strchr(str, '%');
+ if (!current) {
+ trace_seq_puts(s, str);
+ break;
+ }
+ memset(&type, 0, sizeof(type));
+ offset = tep_print_event_param_type(current, &type);
+ *current = '\0';
+ trace_seq_puts(s, str);
+ current += offset;
+ switch (type.type) {
+ case EVENT_TYPE_STRING:
+ print_string(tep, s, record, event,
+ va_arg(args, char*), &type);
+ break;
+ case EVENT_TYPE_INT:
+ print_int(tep, s, record, event,
+ va_arg(args, int), &type);
+ break;
+ case EVENT_TYPE_UNKNOWN:
+ default:
+ trace_seq_printf(s, "[UNKNOWN TYPE]");
+ break;
+ }
+ str = current;
+
+ }
+ va_end(args);
+ free(format);
+}
+
+static int events_id_cmp(const void *a, const void *b)
+{
+ struct tep_event * const * ea = a;
+ struct tep_event * const * eb = b;
+
+ if ((*ea)->id < (*eb)->id)
+ return -1;
+
+ if ((*ea)->id > (*eb)->id)
+ return 1;
+
+ return 0;
+}
+
+static int events_name_cmp(const void *a, const void *b)
+{
+ struct tep_event * const * ea = a;
+ struct tep_event * const * eb = b;
+ int res;
+
+ res = strcmp((*ea)->name, (*eb)->name);
+ if (res)
+ return res;
+
+ res = strcmp((*ea)->system, (*eb)->system);
+ if (res)
+ return res;
+
+ return events_id_cmp(a, b);
+}
+
+static int events_system_cmp(const void *a, const void *b)
+{
+ struct tep_event * const * ea = a;
+ struct tep_event * const * eb = b;
+ int res;
+
+ res = strcmp((*ea)->system, (*eb)->system);
+ if (res)
+ return res;
+
+ res = strcmp((*ea)->name, (*eb)->name);
+ if (res)
+ return res;
+
+ return events_id_cmp(a, b);
+}
+
+static struct tep_event **list_events_copy(struct tep_handle *tep)
+{
+ struct tep_event **events;
+
+ if (!tep)
+ return NULL;
+
+ events = malloc(sizeof(*events) * (tep->nr_events + 1));
+ if (!events)
+ return NULL;
+
+ memcpy(events, tep->events, sizeof(*events) * tep->nr_events);
+ events[tep->nr_events] = NULL;
+ return events;
+}
+
+static void list_events_sort(struct tep_event **events, int nr_events,
+ enum tep_event_sort_type sort_type)
+{
+ int (*sort)(const void *a, const void *b);
+
+ switch (sort_type) {
+ case TEP_EVENT_SORT_ID:
+ sort = events_id_cmp;
+ break;
+ case TEP_EVENT_SORT_NAME:
+ sort = events_name_cmp;
+ break;
+ case TEP_EVENT_SORT_SYSTEM:
+ sort = events_system_cmp;
+ break;
+ default:
+ sort = NULL;
+ }
+
+ if (sort)
+ qsort(events, nr_events, sizeof(*events), sort);
+}
+
+/**
+ * tep_list_events - Get events, sorted by given criteria.
+ * @tep: a handle to the tep context
+ * @sort_type: desired sort order of the events in the array
+ *
+ * Returns an array of pointers to all events, sorted by the given
+ * @sort_type criteria. The last element of the array is NULL. The returned
+ * memory must not be freed, it is managed by the library.
+ * The function is not thread safe.
+ */
+struct tep_event **tep_list_events(struct tep_handle *tep,
+ enum tep_event_sort_type sort_type)
+{
+ struct tep_event **events;
+
+ if (!tep)
+ return NULL;
+
+ events = tep->sort_events;
+ if (events && tep->last_type == sort_type)
+ return events;
+
+ if (!events) {
+ events = list_events_copy(tep);
+ if (!events)
+ return NULL;
+
+ tep->sort_events = events;
+
+ /* the internal events are sorted by id */
+ if (sort_type == TEP_EVENT_SORT_ID) {
+ tep->last_type = sort_type;
+ return events;
+ }
+ }
+
+ list_events_sort(events, tep->nr_events, sort_type);
+ tep->last_type = sort_type;
+
+ return events;
+}
+
+
+/**
+ * tep_list_events_copy - Thread safe version of tep_list_events()
+ * @tep: a handle to the tep context
+ * @sort_type: desired sort order of the events in the array
+ *
+ * Returns an array of pointers to all events, sorted by the given
+ * @sort_type criteria. The last element of the array is NULL. The returned
+ * array is newly allocated inside the function and must be freed by the caller
+ */
+struct tep_event **tep_list_events_copy(struct tep_handle *tep,
+ enum tep_event_sort_type sort_type)
+{
+ struct tep_event **events;
+
+ if (!tep)
+ return NULL;
+
+ events = list_events_copy(tep);
+ if (!events)
+ return NULL;
+
+ /* the internal events are sorted by id */
+ if (sort_type == TEP_EVENT_SORT_ID)
+ return events;
+
+ list_events_sort(events, tep->nr_events, sort_type);
+
+ return events;
+}
+
+static struct tep_format_field **
+get_event_fields(const char *type, const char *name,
+ int count, struct tep_format_field *list)
+{
+ struct tep_format_field **fields;
+ struct tep_format_field *field;
+ int i = 0;
+
+ fields = malloc(sizeof(*fields) * (count + 1));
+ if (!fields)
+ return NULL;
+
+ for (field = list; field; field = field->next) {
+ fields[i++] = field;
+ if (i == count + 1) {
+ do_warning("event %s has more %s fields than specified",
+ name, type);
+ i--;
+ break;
+ }
+ }
+
+ if (i != count)
+ do_warning("event %s has less %s fields than specified",
+ name, type);
+
+ fields[i] = NULL;
+
+ return fields;
+}
+
+/**
+ * tep_event_common_fields - return a list of common fields for an event
+ * @event: the event to return the common fields of.
+ *
+ * Returns an allocated array of fields. The last item in the array is NULL.
+ * The array must be freed with free().
+ */
+struct tep_format_field **tep_event_common_fields(struct tep_event *event)
+{
+ return get_event_fields("common", event->name,
+ event->format.nr_common,
+ event->format.common_fields);
+}
+
+/**
+ * tep_event_fields - return a list of event specific fields for an event
+ * @event: the event to return the fields of.
+ *
+ * Returns an allocated array of fields. The last item in the array is NULL.
+ * The array must be freed with free().
+ */
+struct tep_format_field **tep_event_fields(struct tep_event *event)
+{
+ return get_event_fields("event", event->name,
+ event->format.nr_fields,
+ event->format.fields);
+}
+
+static void print_fields(struct trace_seq *s, struct tep_print_flag_sym *field)
+{
+ trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
+ if (field->next) {
+ trace_seq_puts(s, ", ");
+ print_fields(s, field->next);
+ }
+}
+
+/* for debugging */
+static void print_args(struct tep_print_arg *args)
+{
+ int print_paren = 1;
+ struct trace_seq s;
+
+ switch (args->type) {
+ case TEP_PRINT_NULL:
+ printf("null");
+ break;
+ case TEP_PRINT_ATOM:
+ printf("%s", args->atom.atom);
+ break;
+ case TEP_PRINT_FIELD:
+ printf("REC->%s", args->field.name);
+ break;
+ case TEP_PRINT_FLAGS:
+ printf("__print_flags(");
+ print_args(args->flags.field);
+ printf(", %s, ", args->flags.delim);
+ trace_seq_init(&s);
+ print_fields(&s, args->flags.flags);
+ trace_seq_do_printf(&s);
+ trace_seq_destroy(&s);
+ printf(")");
+ break;
+ case TEP_PRINT_SYMBOL:
+ printf("__print_symbolic(");
+ print_args(args->symbol.field);
+ printf(", ");
+ trace_seq_init(&s);
+ print_fields(&s, args->symbol.symbols);
+ trace_seq_do_printf(&s);
+ trace_seq_destroy(&s);
+ printf(")");
+ break;
+ case TEP_PRINT_HEX:
+ printf("__print_hex(");
+ print_args(args->hex.field);
+ printf(", ");
+ print_args(args->hex.size);
+ printf(")");
+ break;
+ case TEP_PRINT_HEX_STR:
+ printf("__print_hex_str(");
+ print_args(args->hex.field);
+ printf(", ");
+ print_args(args->hex.size);
+ printf(")");
+ break;
+ case TEP_PRINT_INT_ARRAY:
+ printf("__print_array(");
+ print_args(args->int_array.field);
+ printf(", ");
+ print_args(args->int_array.count);
+ printf(", ");
+ print_args(args->int_array.el_size);
+ printf(")");
+ break;
+ case TEP_PRINT_STRING:
+ case TEP_PRINT_BSTRING:
+ printf("__get_str(%s)", args->string.string);
+ break;
+ case TEP_PRINT_BITMASK:
+ printf("__get_bitmask(%s)", args->bitmask.bitmask);
+ break;
+ case TEP_PRINT_CPUMASK:
+ printf("__get_cpumask(%s)", args->bitmask.bitmask);
+ break;
+ case TEP_PRINT_TYPE:
+ printf("(%s)", args->typecast.type);
+ print_args(args->typecast.item);
+ break;
+ case TEP_PRINT_OP:
+ if (strcmp(args->op.op, ":") == 0)
+ print_paren = 0;
+ if (print_paren)
+ printf("(");
+ print_args(args->op.left);
+ printf(" %s ", args->op.op);
+ print_args(args->op.right);
+ if (print_paren)
+ printf(")");
+ break;
+ default:
+ /* we should warn... */
+ return;
+ }
+ if (args->next) {
+ printf("\n");
+ print_args(args->next);
+ }
+}
+
+static void parse_header_field(struct tep_handle *tep, const char *field,
+ int *offset, int *size, int mandatory)
+{
+ unsigned long long save_input_buf_ptr;
+ unsigned long long save_input_buf_siz;
+ char *token;
+ int type;
+
+ save_input_buf_ptr = tep->input_buf_ptr;
+ save_input_buf_siz = tep->input_buf_siz;
+
+ if (read_expected(tep, TEP_EVENT_ITEM, "field") < 0)
+ return;
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ return;
+
+ /* type */
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+ free_token(token);
+
+ /*
+ * If this is not a mandatory field, then test it first.
+ */
+ if (mandatory) {
+ if (read_expected(tep, TEP_EVENT_ITEM, field) < 0)
+ return;
+ } else {
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+ if (strcmp(token, field) != 0)
+ goto discard;
+ free_token(token);
+ }
+
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ return;
+ if (read_expected(tep, TEP_EVENT_ITEM, "offset") < 0)
+ return;
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ return;
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+ *offset = atoi(token);
+ free_token(token);
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ return;
+ if (read_expected(tep, TEP_EVENT_ITEM, "size") < 0)
+ return;
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ return;
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token) < 0)
+ goto fail;
+ *size = atoi(token);
+ free_token(token);
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ return;
+ type = read_token(tep, &token);
+ if (type != TEP_EVENT_NEWLINE) {
+ /* newer versions of the kernel have a "signed" type */
+ if (type != TEP_EVENT_ITEM)
+ goto fail;
+
+ if (strcmp(token, "signed") != 0)
+ goto fail;
+
+ free_token(token);
+
+ if (read_expected(tep, TEP_EVENT_OP, ":") < 0)
+ return;
+
+ if (read_expect_type(tep, TEP_EVENT_ITEM, &token))
+ goto fail;
+
+ free_token(token);
+ if (read_expected(tep, TEP_EVENT_OP, ";") < 0)
+ return;
+
+ if (read_expect_type(tep, TEP_EVENT_NEWLINE, &token))
+ goto fail;
+ }
+ fail:
+ free_token(token);
+ return;
+
+ discard:
+ tep->input_buf_ptr = save_input_buf_ptr;
+ tep->input_buf_siz = save_input_buf_siz;
+ *offset = 0;
+ *size = 0;
+ free_token(token);
+}
+
+/**
+ * tep_parse_header_page - parse the data stored in the header page
+ * @tep: a handle to the trace event parser context
+ * @buf: the buffer storing the header page format string
+ * @size: the size of @buf
+ * @long_size: the long size to use if there is no header
+ *
+ * This parses the header page format for information on the
+ * ring buffer used. The @buf should be copied from
+ *
+ * /sys/kernel/debug/tracing/events/header_page
+ */
+int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size,
+ int long_size)
+{
+ int ignore;
+
+ if (!size) {
+ /*
+ * Old kernels did not have header page info.
+ * Sorry but we just use what we find here in user space.
+ */
+ tep->header_page_ts_size = sizeof(long long);
+ tep->header_page_size_size = long_size;
+ tep->header_page_data_offset = sizeof(long long) + long_size;
+ tep->header_page_data_size = getpagesize() - tep->header_page_data_offset;
+ tep->old_format = 1;
+ return -1;
+ }
+ init_input_buf(tep, buf, size);
+
+ parse_header_field(tep, "timestamp", &tep->header_page_ts_offset,
+ &tep->header_page_ts_size, 1);
+ parse_header_field(tep, "commit", &tep->header_page_size_offset,
+ &tep->header_page_size_size, 1);
+ parse_header_field(tep, "overwrite", &tep->header_page_overwrite,
+ &ignore, 0);
+ parse_header_field(tep, "data", &tep->header_page_data_offset,
+ &tep->header_page_data_size, 1);
+
+ return 0;
+}
+
+static int event_matches(struct tep_event *event,
+ int id, const char *sys_name,
+ const char *event_name)
+{
+ if (id >= 0 && id != event->id)
+ return 0;
+
+ if (event_name && (strcmp(event_name, event->name) != 0))
+ return 0;
+
+ if (sys_name && (strcmp(sys_name, event->system) != 0))
+ return 0;
+
+ return 1;
+}
+
+static void free_handler(struct event_handler *handle)
+{
+ free((void *)handle->sys_name);
+ free((void *)handle->event_name);
+ free(handle);
+}
+
+static int find_event_handle(struct tep_handle *tep, struct tep_event *event)
+{
+ struct event_handler *handle, **next;
+
+ for (next = &tep->handlers; *next;
+ next = &(*next)->next) {
+ handle = *next;
+ if (event_matches(event, handle->id,
+ handle->sys_name,
+ handle->event_name))
+ break;
+ }
+
+ if (!(*next))
+ return 0;
+
+ tep_info("overriding event (%d) %s:%s with new print handler",
+ event->id, event->system, event->name);
+
+ event->handler = handle->func;
+ event->context = handle->context;
+
+ *next = handle->next;
+ free_handler(handle);
+
+ return 1;
+}
+
+/**
+ * parse_format - parse the event format
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+static enum tep_errno parse_format(struct tep_event **eventp,
+ struct tep_handle *tep, const char *buf,
+ unsigned long size, const char *sys)
+{
+ struct tep_event *event;
+ int ret;
+
+ init_input_buf(tep, buf, size);
+
+ *eventp = event = alloc_event();
+ if (!event)
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+
+ event->name = event_read_name(tep);
+ if (!event->name) {
+ /* Bad event? */
+ ret = TEP_ERRNO__MEM_ALLOC_FAILED;
+ goto event_alloc_failed;
+ }
+
+ if (strcmp(sys, "ftrace") == 0) {
+ event->flags |= TEP_EVENT_FL_ISFTRACE;
+
+ if (strcmp(event->name, "bprint") == 0)
+ event->flags |= TEP_EVENT_FL_ISBPRINT;
+ }
+
+ event->id = event_read_id(tep);
+ if (event->id < 0) {
+ ret = TEP_ERRNO__READ_ID_FAILED;
+ /*
+ * This isn't an allocation error actually.
+ * But as the ID is critical, just bail out.
+ */
+ goto event_alloc_failed;
+ }
+
+ event->system = strdup(sys);
+ if (!event->system) {
+ ret = TEP_ERRNO__MEM_ALLOC_FAILED;
+ goto event_alloc_failed;
+ }
+
+ /* Add tep to event so that it can be referenced */
+ event->tep = tep;
+
+ ret = event_read_format(event);
+ if (ret < 0) {
+ ret = TEP_ERRNO__READ_FORMAT_FAILED;
+ goto event_parse_failed;
+ }
+
+ /*
+ * If the event has an override, don't print warnings if the event
+ * print format fails to parse.
+ */
+ if (tep && find_event_handle(tep, event))
+ show_warning = 0;
+
+ ret = event_read_print(event);
+ show_warning = 1;
+
+ if (ret < 0) {
+ ret = TEP_ERRNO__READ_PRINT_FAILED;
+ goto event_parse_failed;
+ }
+
+ if (!ret && (event->flags & TEP_EVENT_FL_ISFTRACE)) {
+ struct tep_format_field *field;
+ struct tep_print_arg *arg, **list;
+
+ /* old ftrace had no args */
+ list = &event->print_fmt.args;
+ for (field = event->format.fields; field; field = field->next) {
+ arg = alloc_arg();
+ if (!arg) {
+ event->flags |= TEP_EVENT_FL_FAILED;
+ return TEP_ERRNO__OLD_FTRACE_ARG_FAILED;
+ }
+ arg->type = TEP_PRINT_FIELD;
+ arg->field.name = strdup(field->name);
+ if (!arg->field.name) {
+ event->flags |= TEP_EVENT_FL_FAILED;
+ free_arg(arg);
+ return TEP_ERRNO__OLD_FTRACE_ARG_FAILED;
+ }
+ arg->field.field = field;
+ *list = arg;
+ list = &arg->next;
+ }
+ }
+
+ if (!(event->flags & TEP_EVENT_FL_ISBPRINT))
+ event->print_fmt.print_cache = parse_args(event,
+ event->print_fmt.format,
+ event->print_fmt.args);
+
+ return 0;
+
+ event_parse_failed:
+ event->flags |= TEP_EVENT_FL_FAILED;
+ return ret;
+
+ event_alloc_failed:
+ free(event->system);
+ free(event->name);
+ free(event);
+ *eventp = NULL;
+ return ret;
+}
+
+static enum tep_errno
+__parse_event(struct tep_handle *tep,
+ struct tep_event **eventp,
+ const char *buf, unsigned long size,
+ const char *sys)
+{
+ int ret = parse_format(eventp, tep, buf, size, sys);
+ struct tep_event *event = *eventp;
+
+ if (event == NULL)
+ return ret;
+
+ if (tep && add_event(tep, event)) {
+ ret = TEP_ERRNO__MEM_ALLOC_FAILED;
+ goto event_add_failed;
+ }
+
+#define PRINT_ARGS 0
+ if (PRINT_ARGS && event->print_fmt.args)
+ print_args(event->print_fmt.args);
+
+ return 0;
+
+event_add_failed:
+ free_tep_event(event);
+ return ret;
+}
+
+/**
+ * tep_parse_format - parse the event format
+ * @tep: a handle to the trace event parser context
+ * @eventp: returned format
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum tep_errno tep_parse_format(struct tep_handle *tep,
+ struct tep_event **eventp,
+ const char *buf,
+ unsigned long size, const char *sys)
+{
+ return __parse_event(tep, eventp, buf, size, sys);
+}
+
+/**
+ * tep_parse_event - parse the event format
+ * @tep: a handle to the trace event parser context
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum tep_errno tep_parse_event(struct tep_handle *tep, const char *buf,
+ unsigned long size, const char *sys)
+{
+ struct tep_event *event = NULL;
+ return __parse_event(tep, &event, buf, size, sys);
+}
+
+int get_field_val(struct trace_seq *s, struct tep_format_field *field,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err)
+{
+ if (!field) {
+ if (err)
+ trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
+ return -1;
+ }
+
+ if (tep_read_number_field(field, record->data, val)) {
+ if (err)
+ trace_seq_printf(s, " %s=INVALID", name);
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * tep_get_field_raw - return the raw pointer into the data field
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @len: place to store the field length.
+ * @err: print default error if failed.
+ *
+ * Returns a pointer into record->data of the field and places
+ * the length of the field in @len.
+ *
+ * On failure, it returns NULL.
+ */
+void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ int *len, int err)
+{
+ struct tep_format_field *field;
+ void *data = record->data;
+ unsigned offset;
+ int dummy;
+
+ if (!event)
+ return NULL;
+
+ field = tep_find_field(event, name);
+
+ if (!field) {
+ if (err)
+ trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
+ return NULL;
+ }
+
+ /* Allow @len to be NULL */
+ if (!len)
+ len = &dummy;
+
+ offset = field->offset;
+ if (field->flags & TEP_FIELD_IS_DYNAMIC) {
+ offset = tep_read_number(event->tep,
+ data + offset, field->size);
+ *len = offset >> 16;
+ offset &= 0xffff;
+ if (field->flags & TEP_FIELD_IS_RELATIVE)
+ offset += field->offset + field->size;
+ } else
+ *len = field->size;
+
+ return data + offset;
+}
+
+/**
+ * tep_get_field_val - find a field and return its value
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @val: place to store the value of the field.
+ * @err: print default error if failed.
+ *
+ * Returns 0 on success -1 on field not found.
+ */
+int tep_get_field_val(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err)
+{
+ struct tep_format_field *field;
+
+ if (!event)
+ return -1;
+
+ field = tep_find_field(event, name);
+
+ return get_field_val(s, field, name, record, val, err);
+}
+
+/**
+ * tep_get_common_field_val - find a common field and return its value
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @val: place to store the value of the field.
+ * @err: print default error if failed.
+ *
+ * Returns 0 on success -1 on field not found.
+ */
+int tep_get_common_field_val(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err)
+{
+ struct tep_format_field *field;
+
+ if (!event)
+ return -1;
+
+ field = tep_find_common_field(event, name);
+
+ return get_field_val(s, field, name, record, val, err);
+}
+
+/**
+ * tep_get_any_field_val - find a any field and return its value
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @val: place to store the value of the field.
+ * @err: print default error if failed.
+ *
+ * Returns 0 on success -1 on field not found.
+ */
+int tep_get_any_field_val(struct trace_seq *s, struct tep_event *event,
+ const char *name, struct tep_record *record,
+ unsigned long long *val, int err)
+{
+ struct tep_format_field *field;
+
+ if (!event)
+ return -1;
+
+ field = tep_find_any_field(event, name);
+
+ return get_field_val(s, field, name, record, val, err);
+}
+
+/**
+ * tep_print_num_field - print a field and a format
+ * @s: The seq to print to
+ * @fmt: The printf format to print the field with.
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @err: print default error if failed.
+ *
+ * Returns positive value on success, negative in case of an error,
+ * or 0 if buffer is full.
+ */
+int tep_print_num_field(struct trace_seq *s, const char *fmt,
+ struct tep_event *event, const char *name,
+ struct tep_record *record, int err)
+{
+ struct tep_format_field *field = tep_find_field(event, name);
+ unsigned long long val;
+
+ if (!field)
+ goto failed;
+
+ if (tep_read_number_field(field, record->data, &val))
+ goto failed;
+
+ return trace_seq_printf(s, fmt, val);
+
+ failed:
+ if (err)
+ trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
+ return -1;
+}
+
+/**
+ * tep_print_func_field - print a field and a format for function pointers
+ * @s: The seq to print to
+ * @fmt: The printf format to print the field with.
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @err: print default error if failed.
+ *
+ * Returns positive value on success, negative in case of an error,
+ * or 0 if buffer is full.
+ */
+int tep_print_func_field(struct trace_seq *s, const char *fmt,
+ struct tep_event *event, const char *name,
+ struct tep_record *record, int err)
+{
+ struct tep_format_field *field = tep_find_field(event, name);
+ struct tep_handle *tep = event->tep;
+ unsigned long long val;
+ struct func_map *func;
+ char tmp[128];
+
+ if (!field)
+ goto failed;
+
+ if (tep_read_number_field(field, record->data, &val))
+ goto failed;
+
+ func = find_func(tep, val);
+
+ if (func)
+ snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
+ else
+ sprintf(tmp, "0x%08llx", val);
+
+ return trace_seq_printf(s, fmt, tmp);
+
+ failed:
+ if (err)
+ trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
+ return -1;
+}
+
+static void free_func_handle(struct tep_function_handler *func)
+{
+ struct func_params *params;
+
+ free(func->name);
+
+ while (func->params) {
+ params = func->params;
+ func->params = params->next;
+ free(params);
+ }
+
+ free(func);
+}
+
+/**
+ * tep_register_print_function - register a helper function
+ * @tep: a handle to the trace event parser context
+ * @func: the function to process the helper function
+ * @ret_type: the return type of the helper function
+ * @name: the name of the helper function
+ * @parameters: A list of enum tep_func_arg_type
+ *
+ * Some events may have helper functions in the print format arguments.
+ * This allows a plugin to dynamically create a way to process one
+ * of these functions.
+ *
+ * The @parameters is a variable list of tep_func_arg_type enums that
+ * must end with TEP_FUNC_ARG_VOID.
+ */
+int tep_register_print_function(struct tep_handle *tep,
+ tep_func_handler func,
+ enum tep_func_arg_type ret_type,
+ char *name, ...)
+{
+ struct tep_function_handler *func_handle;
+ struct func_params **next_param;
+ struct func_params *param;
+ enum tep_func_arg_type type;
+ va_list ap;
+ int ret;
+
+ func_handle = find_func_handler(tep, name);
+ if (func_handle) {
+ /*
+ * This is most like caused by the users own
+ * plugins updating the function. This overrides the
+ * system defaults.
+ */
+ tep_info("override of function helper '%s'", name);
+ remove_func_handler(tep, name);
+ }
+
+ func_handle = calloc(1, sizeof(*func_handle));
+ if (!func_handle) {
+ do_warning("Failed to allocate function handler");
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ func_handle->ret_type = ret_type;
+ func_handle->name = strdup(name);
+ func_handle->func = func;
+ if (!func_handle->name) {
+ do_warning("Failed to allocate function name");
+ free(func_handle);
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ next_param = &(func_handle->params);
+ va_start(ap, name);
+ for (;;) {
+ type = va_arg(ap, enum tep_func_arg_type);
+ if (type == TEP_FUNC_ARG_VOID)
+ break;
+
+ if (type >= TEP_FUNC_ARG_MAX_TYPES) {
+ do_warning("Invalid argument type %d", type);
+ ret = TEP_ERRNO__INVALID_ARG_TYPE;
+ goto out_free;
+ }
+
+ param = malloc(sizeof(*param));
+ if (!param) {
+ do_warning("Failed to allocate function param");
+ ret = TEP_ERRNO__MEM_ALLOC_FAILED;
+ goto out_free;
+ }
+ param->type = type;
+ param->next = NULL;
+
+ *next_param = param;
+ next_param = &(param->next);
+
+ func_handle->nr_args++;
+ }
+ va_end(ap);
+
+ func_handle->next = tep->func_handlers;
+ tep->func_handlers = func_handle;
+
+ return 0;
+ out_free:
+ va_end(ap);
+ free_func_handle(func_handle);
+ return ret;
+}
+
+/**
+ * tep_unregister_print_function - unregister a helper function
+ * @tep: a handle to the trace event parser context
+ * @func: the function to process the helper function
+ * @name: the name of the helper function
+ *
+ * This function removes existing print handler for function @name.
+ *
+ * Returns 0 if the handler was removed successully, -1 otherwise.
+ */
+int tep_unregister_print_function(struct tep_handle *tep,
+ tep_func_handler func, char *name)
+{
+ struct tep_function_handler *func_handle;
+
+ func_handle = find_func_handler(tep, name);
+ if (func_handle && func_handle->func == func) {
+ remove_func_handler(tep, name);
+ return 0;
+ }
+ return -1;
+}
+
+static struct tep_event *search_event(struct tep_handle *tep, int id,
+ const char *sys_name,
+ const char *event_name)
+{
+ struct tep_event *event;
+
+ if (id >= 0) {
+ /* search by id */
+ event = tep_find_event(tep, id);
+ if (!event)
+ return NULL;
+ if (event_name && (strcmp(event_name, event->name) != 0))
+ return NULL;
+ if (sys_name && (strcmp(sys_name, event->system) != 0))
+ return NULL;
+ } else {
+ event = tep_find_event_by_name(tep, sys_name, event_name);
+ if (!event)
+ return NULL;
+ }
+ return event;
+}
+
+/**
+ * tep_register_event_handler - register a way to parse an event
+ * @tep: a handle to the trace event parser context
+ * @id: the id of the event to register
+ * @sys_name: the system name the event belongs to
+ * @event_name: the name of the event
+ * @func: the function to call to parse the event information
+ * @context: the data to be passed to @func
+ *
+ * This function allows a developer to override the parsing of
+ * a given event. If for some reason the default print format
+ * is not sufficient, this function will register a function
+ * for an event to be used to parse the data instead.
+ *
+ * If @id is >= 0, then it is used to find the event.
+ * else @sys_name and @event_name are used.
+ *
+ * Returns:
+ * TEP_REGISTER_SUCCESS_OVERWRITE if an existing handler is overwritten
+ * TEP_REGISTER_SUCCESS if a new handler is registered successfully
+ * negative TEP_ERRNO_... in case of an error
+ *
+ */
+int tep_register_event_handler(struct tep_handle *tep, int id,
+ const char *sys_name, const char *event_name,
+ tep_event_handler_func func, void *context)
+{
+ struct tep_event *event;
+ struct event_handler *handle;
+
+ event = search_event(tep, id, sys_name, event_name);
+ if (event == NULL)
+ goto not_found;
+
+ tep_info("overriding event (%d) %s:%s with new print handler",
+ event->id, event->system, event->name);
+
+ event->handler = func;
+ event->context = context;
+ return TEP_REGISTER_SUCCESS_OVERWRITE;
+
+ not_found:
+ /* Save for later use. */
+ handle = calloc(1, sizeof(*handle));
+ if (!handle) {
+ do_warning("Failed to allocate event handler");
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ handle->id = id;
+ if (event_name)
+ handle->event_name = strdup(event_name);
+ if (sys_name)
+ handle->sys_name = strdup(sys_name);
+
+ if ((event_name && !handle->event_name) ||
+ (sys_name && !handle->sys_name)) {
+ do_warning("Failed to allocate event/sys name");
+ free((void *)handle->event_name);
+ free((void *)handle->sys_name);
+ free(handle);
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ handle->func = func;
+ handle->next = tep->handlers;
+ tep->handlers = handle;
+ handle->context = context;
+
+ return TEP_REGISTER_SUCCESS;
+}
+
+static int handle_matches(struct event_handler *handler, int id,
+ const char *sys_name, const char *event_name,
+ tep_event_handler_func func, void *context)
+{
+ if (id >= 0 && id != handler->id)
+ return 0;
+
+ if (event_name && (strcmp(event_name, handler->event_name) != 0))
+ return 0;
+
+ if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
+ return 0;
+
+ if (func != handler->func || context != handler->context)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * tep_unregister_event_handler - unregister an existing event handler
+ * @tep: a handle to the trace event parser context
+ * @id: the id of the event to unregister
+ * @sys_name: the system name the handler belongs to
+ * @event_name: the name of the event handler
+ * @func: the function to call to parse the event information
+ * @context: the data to be passed to @func
+ *
+ * This function removes existing event handler (parser).
+ *
+ * If @id is >= 0, then it is used to find the event.
+ * else @sys_name and @event_name are used.
+ *
+ * Returns 0 if handler was removed successfully, -1 if event was not found.
+ */
+int tep_unregister_event_handler(struct tep_handle *tep, int id,
+ const char *sys_name, const char *event_name,
+ tep_event_handler_func func, void *context)
+{
+ struct tep_event *event;
+ struct event_handler *handle;
+ struct event_handler **next;
+
+ event = search_event(tep, id, sys_name, event_name);
+ if (event == NULL)
+ goto not_found;
+
+ if (event->handler == func && event->context == context) {
+ tep_info("removing override handler for event (%d) %s:%s. Going back to default handler.",
+ event->id, event->system, event->name);
+
+ event->handler = NULL;
+ event->context = NULL;
+ return 0;
+ }
+
+not_found:
+ for (next = &tep->handlers; *next; next = &(*next)->next) {
+ handle = *next;
+ if (handle_matches(handle, id, sys_name, event_name,
+ func, context))
+ break;
+ }
+
+ if (!(*next))
+ return -1;
+
+ *next = handle->next;
+ free_handler(handle);
+
+ return 0;
+}
+
+/**
+ * tep_alloc - create a tep handle
+ */
+struct tep_handle *tep_alloc(void)
+{
+ struct tep_handle *tep = calloc(1, sizeof(*tep));
+
+ if (tep) {
+ tep->ref_count = 1;
+ tep->host_bigendian = tep_is_bigendian();
+ }
+
+ return tep;
+}
+
+void tep_ref(struct tep_handle *tep)
+{
+ tep->ref_count++;
+}
+
+int tep_get_ref(struct tep_handle *tep)
+{
+ if (tep)
+ return tep->ref_count;
+ return 0;
+}
+
+__hidden void free_tep_format_field(struct tep_format_field *field)
+{
+ free(field->type);
+ if (field->alias != field->name)
+ free(field->alias);
+ free(field->name);
+ free(field);
+}
+
+static void free_format_fields(struct tep_format_field *field)
+{
+ struct tep_format_field *next;
+
+ while (field) {
+ next = field->next;
+ free_tep_format_field(field);
+ field = next;
+ }
+}
+
+static void free_formats(struct tep_format *format)
+{
+ free_format_fields(format->common_fields);
+ free_format_fields(format->fields);
+}
+
+__hidden void free_tep_event(struct tep_event *event)
+{
+ free(event->name);
+ free(event->system);
+
+ free_formats(&event->format);
+
+ free(event->print_fmt.format);
+ free_args(event->print_fmt.args);
+ free_parse_args(event->print_fmt.print_cache);
+ free(event);
+}
+
+/**
+ * tep_free - free a tep handle
+ * @tep: the tep handle to free
+ */
+void tep_free(struct tep_handle *tep)
+{
+ struct cmdline_list *cmdlist, *cmdnext;
+ struct func_list *funclist, *funcnext;
+ struct printk_list *printklist, *printknext;
+ struct tep_function_handler *func_handler;
+ struct event_handler *handle;
+ int i;
+
+ if (!tep)
+ return;
+
+ cmdlist = tep->cmdlist;
+ funclist = tep->funclist;
+ printklist = tep->printklist;
+
+ tep->ref_count--;
+ if (tep->ref_count)
+ return;
+
+ if (tep->cmdlines) {
+ for (i = 0; i < tep->cmdline_count; i++)
+ free(tep->cmdlines[i].comm);
+ free(tep->cmdlines);
+ }
+
+ while (cmdlist) {
+ cmdnext = cmdlist->next;
+ free(cmdlist->comm);
+ free(cmdlist);
+ cmdlist = cmdnext;
+ }
+
+ if (tep->func_map) {
+ for (i = 0; i < (int)tep->func_count; i++) {
+ free(tep->func_map[i].func);
+ free(tep->func_map[i].mod);
+ }
+ free(tep->func_map);
+ }
+
+ while (funclist) {
+ funcnext = funclist->next;
+ free(funclist->func);
+ free(funclist->mod);
+ free(funclist);
+ funclist = funcnext;
+ }
+
+ while (tep->func_handlers) {
+ func_handler = tep->func_handlers;
+ tep->func_handlers = func_handler->next;
+ free_func_handle(func_handler);
+ }
+
+ if (tep->printk_map) {
+ for (i = 0; i < (int)tep->printk_count; i++)
+ free(tep->printk_map[i].printk);
+ free(tep->printk_map);
+ }
+
+ while (printklist) {
+ printknext = printklist->next;
+ free(printklist->printk);
+ free(printklist);
+ printklist = printknext;
+ }
+
+ for (i = 0; i < tep->nr_events; i++)
+ free_tep_event(tep->events[i]);
+
+ while (tep->handlers) {
+ handle = tep->handlers;
+ tep->handlers = handle->next;
+ free_handler(handle);
+ }
+
+ free(tep->events);
+ free(tep->sort_events);
+ free(tep->func_resolver);
+ free_tep_plugin_paths(tep);
+
+ free(tep);
+}
+
+void tep_unref(struct tep_handle *tep)
+{
+ tep_free(tep);
+}
diff --git a/src/event-plugin.c b/src/event-plugin.c
new file mode 100644
index 0000000..f42243f
--- /dev/null
+++ b/src/event-plugin.c
@@ -0,0 +1,711 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <errno.h>
+#include "event-parse.h"
+#include "event-parse-local.h"
+#include "event-utils.h"
+#include "trace-seq.h"
+
+#define LOCAL_PLUGIN_DIR ".local/lib/traceevent/plugins/"
+
+static struct registered_plugin_options {
+ struct registered_plugin_options *next;
+ struct tep_plugin_option *options;
+} *registered_options;
+
+static struct trace_plugin_options {
+ struct trace_plugin_options *next;
+ char *plugin;
+ char *option;
+ char *value;
+} *trace_plugin_options;
+
+struct tep_plugin_list {
+ struct tep_plugin_list *next;
+ char *name;
+ void *handle;
+};
+
+struct tep_plugins_dir {
+ struct tep_plugins_dir *next;
+ char *path;
+ enum tep_plugin_load_priority prio;
+};
+
+static void lower_case(char *str)
+{
+ if (!str)
+ return;
+ for (; *str; str++)
+ *str = tolower(*str);
+}
+
+static int update_option_value(struct tep_plugin_option *op, const char *val)
+{
+ char *op_val;
+
+ if (!val) {
+ /* toggle, only if option is boolean */
+ if (op->value)
+ /* Warn? */
+ return 0;
+ op->set ^= 1;
+ return 0;
+ }
+
+ /*
+ * If the option has a value then it takes a string
+ * otherwise the option is a boolean.
+ */
+ if (op->value) {
+ op->value = val;
+ return 0;
+ }
+
+ /* Option is boolean, must be either "1", "0", "true" or "false" */
+
+ op_val = strdup(val);
+ if (!op_val)
+ return -1;
+ lower_case(op_val);
+
+ if (strcmp(val, "1") == 0 || strcmp(val, "true") == 0)
+ op->set = 1;
+ else if (strcmp(val, "0") == 0 || strcmp(val, "false") == 0)
+ op->set = 0;
+ free(op_val);
+
+ return 0;
+}
+
+/**
+ * tep_plugin_list_options - get list of plugin options
+ *
+ * Returns an array of char strings that list the currently registered
+ * plugin options in the format of <plugin>:<option>. This list can be
+ * used by toggling the option.
+ *
+ * Returns NULL if there's no options registered. On error it returns
+ * INVALID_PLUGIN_LIST_OPTION
+ *
+ * Must be freed with tep_plugin_free_options_list().
+ */
+char **tep_plugin_list_options(void)
+{
+ struct registered_plugin_options *reg;
+ struct tep_plugin_option *op;
+ char **list = NULL;
+ char *name;
+ int count = 0;
+
+ for (reg = registered_options; reg; reg = reg->next) {
+ for (op = reg->options; op->name; op++) {
+ char *alias = op->plugin_alias ? op->plugin_alias : op->file;
+ char **temp = list;
+ int ret;
+
+ ret = asprintf(&name, "%s:%s", alias, op->name);
+ if (ret < 0)
+ goto err;
+
+ list = realloc(list, count + 2);
+ if (!list) {
+ list = temp;
+ free(name);
+ goto err;
+ }
+ list[count++] = name;
+ list[count] = NULL;
+ }
+ }
+ return list;
+
+ err:
+ while (--count >= 0)
+ free(list[count]);
+ free(list);
+
+ return INVALID_PLUGIN_LIST_OPTION;
+}
+
+void tep_plugin_free_options_list(char **list)
+{
+ int i;
+
+ if (!list)
+ return;
+
+ if (list == INVALID_PLUGIN_LIST_OPTION)
+ return;
+
+ for (i = 0; list[i]; i++)
+ free(list[i]);
+
+ free(list);
+}
+
+static int
+update_option(const char *file, struct tep_plugin_option *option)
+{
+ struct trace_plugin_options *op;
+ char *plugin;
+ int ret = 0;
+
+ if (option->plugin_alias) {
+ plugin = strdup(option->plugin_alias);
+ if (!plugin)
+ return -1;
+ } else {
+ char *p;
+ plugin = strdup(file);
+ if (!plugin)
+ return -1;
+ p = strstr(plugin, ".");
+ if (p)
+ *p = '\0';
+ }
+
+ /* first look for named options */
+ for (op = trace_plugin_options; op; op = op->next) {
+ if (!op->plugin)
+ continue;
+ if (strcmp(op->plugin, plugin) != 0)
+ continue;
+ if (strcmp(op->option, option->name) != 0)
+ continue;
+
+ ret = update_option_value(option, op->value);
+ if (ret)
+ goto out;
+ break;
+ }
+
+ /* first look for unnamed options */
+ for (op = trace_plugin_options; op; op = op->next) {
+ if (op->plugin)
+ continue;
+ if (strcmp(op->option, option->name) != 0)
+ continue;
+
+ ret = update_option_value(option, op->value);
+ break;
+ }
+
+ out:
+ free(plugin);
+ return ret;
+}
+
+/**
+ * tep_plugin_add_options - Add a set of options by a plugin
+ * @name: The name of the plugin adding the options
+ * @options: The set of options being loaded
+ *
+ * Sets the options with the values that have been added by user.
+ */
+int tep_plugin_add_options(const char *name,
+ struct tep_plugin_option *options)
+{
+ struct registered_plugin_options *reg;
+
+ reg = malloc(sizeof(*reg));
+ if (!reg)
+ return -1;
+ reg->next = registered_options;
+ reg->options = options;
+ registered_options = reg;
+
+ while (options->name) {
+ update_option(name, options);
+ options++;
+ }
+ return 0;
+}
+
+/**
+ * tep_plugin_remove_options - remove plugin options that were registered
+ * @options: Options to removed that were registered with tep_plugin_add_options
+ */
+void tep_plugin_remove_options(struct tep_plugin_option *options)
+{
+ struct registered_plugin_options **last;
+ struct registered_plugin_options *reg;
+
+ for (last = ®istered_options; *last; last = &(*last)->next) {
+ if ((*last)->options == options) {
+ reg = *last;
+ *last = reg->next;
+ free(reg);
+ return;
+ }
+ }
+}
+
+static int parse_option_name(char **option, char **plugin)
+{
+ char *p;
+
+ *plugin = NULL;
+
+ if ((p = strstr(*option, ":"))) {
+ *plugin = *option;
+ *p = '\0';
+ *option = strdup(p + 1);
+ if (!*option)
+ return -1;
+ }
+ return 0;
+}
+
+static struct tep_plugin_option *
+find_registered_option(const char *plugin, const char *option)
+{
+ struct registered_plugin_options *reg;
+ struct tep_plugin_option *op;
+ const char *op_plugin;
+
+ for (reg = registered_options; reg; reg = reg->next) {
+ for (op = reg->options; op->name; op++) {
+ if (op->plugin_alias)
+ op_plugin = op->plugin_alias;
+ else
+ op_plugin = op->file;
+
+ if (plugin && strcmp(plugin, op_plugin) != 0)
+ continue;
+ if (strcmp(option, op->name) != 0)
+ continue;
+
+ return op;
+ }
+ }
+
+ return NULL;
+}
+
+static int process_option(const char *plugin, const char *option, const char *val)
+{
+ struct tep_plugin_option *op;
+
+ op = find_registered_option(plugin, option);
+ if (!op)
+ return 0;
+
+ return update_option_value(op, val);
+}
+
+/**
+ * tep_plugin_add_option - add an option/val pair to set plugin options
+ * @name: The name of the option (format: <plugin>:<option> or just <option>)
+ * @val: (optional) the value for the option
+ *
+ * Modify a plugin option. If @val is given than the value of the option
+ * is set (note, some options just take a boolean, so @val must be either
+ * "1" or "0" or "true" or "false").
+ */
+int tep_plugin_add_option(const char *name, const char *val)
+{
+ struct trace_plugin_options *op;
+ char *option_str;
+ char *plugin;
+
+ option_str = strdup(name);
+ if (!option_str)
+ return -ENOMEM;
+
+ if (parse_option_name(&option_str, &plugin) < 0)
+ return -ENOMEM;
+
+ /* If the option exists, update the val */
+ for (op = trace_plugin_options; op; op = op->next) {
+ /* Both must be NULL or not NULL */
+ if ((!plugin || !op->plugin) && plugin != op->plugin)
+ continue;
+ if (plugin && strcmp(plugin, op->plugin) != 0)
+ continue;
+ if (strcmp(op->option, option_str) != 0)
+ continue;
+
+ /* update option */
+ free(op->value);
+ if (val) {
+ op->value = strdup(val);
+ if (!op->value)
+ goto out_free;
+ } else
+ op->value = NULL;
+
+ /* plugin and option_str don't get freed at the end */
+ free(plugin);
+ free(option_str);
+
+ plugin = op->plugin;
+ option_str = op->option;
+ break;
+ }
+
+ /* If not found, create */
+ if (!op) {
+ op = malloc(sizeof(*op));
+ if (!op)
+ goto out_free;
+ memset(op, 0, sizeof(*op));
+ op->plugin = plugin;
+ op->option = option_str;
+ if (val) {
+ op->value = strdup(val);
+ if (!op->value) {
+ free(op);
+ goto out_free;
+ }
+ }
+ op->next = trace_plugin_options;
+ trace_plugin_options = op;
+ }
+
+ return process_option(plugin, option_str, val);
+
+out_free:
+ free(plugin);
+ free(option_str);
+ return -ENOMEM;
+}
+
+static void print_op_data(struct trace_seq *s, const char *name,
+ const char *op)
+{
+ if (op)
+ trace_seq_printf(s, "%8s:\t%s\n", name, op);
+}
+
+/**
+ * tep_plugin_print_options - print out the registered plugin options
+ * @s: The trace_seq descriptor to write the plugin options into
+ *
+ * Writes a list of options into trace_seq @s.
+ */
+void tep_plugin_print_options(struct trace_seq *s)
+{
+ struct registered_plugin_options *reg;
+ struct tep_plugin_option *op;
+
+ for (reg = registered_options; reg; reg = reg->next) {
+ if (reg != registered_options)
+ trace_seq_printf(s, "============\n");
+ for (op = reg->options; op->name; op++) {
+ if (op != reg->options)
+ trace_seq_printf(s, "------------\n");
+ print_op_data(s, "file", op->file);
+ print_op_data(s, "plugin", op->plugin_alias);
+ print_op_data(s, "option", op->name);
+ print_op_data(s, "desc", op->description);
+ print_op_data(s, "value", op->value);
+ trace_seq_printf(s, "%8s:\t%d\n", "set", op->set);
+ }
+ }
+}
+
+/**
+ * tep_print_plugins - print out the list of plugins loaded
+ * @s: the trace_seq descripter to write to
+ * @prefix: The prefix string to add before listing the option name
+ * @suffix: The suffix string ot append after the option name
+ * @list: The list of plugins (usually returned by tep_load_plugins()
+ *
+ * Writes to the trace_seq @s the list of plugins (files) that is
+ * returned by tep_load_plugins(). Use @prefix and @suffix for formating:
+ * @prefix = " ", @suffix = "\n".
+ */
+void tep_print_plugins(struct trace_seq *s,
+ const char *prefix, const char *suffix,
+ const struct tep_plugin_list *list)
+{
+ while (list) {
+ trace_seq_printf(s, "%s%s%s", prefix, list->name, suffix);
+ list = list->next;
+ }
+}
+
+static void
+load_plugin(struct tep_handle *tep, const char *path,
+ const char *file, void *data)
+{
+ struct tep_plugin_list **plugin_list = data;
+ struct tep_plugin_option *options;
+ tep_plugin_load_func func;
+ struct tep_plugin_list *list;
+ const char *alias;
+ char *plugin;
+ void *handle;
+ int ret;
+
+ ret = asprintf(&plugin, "%s/%s", path, file);
+ if (ret < 0) {
+ tep_warning("could not allocate plugin memory\n");
+ return;
+ }
+
+ handle = dlopen(plugin, RTLD_NOW | RTLD_GLOBAL);
+ if (!handle) {
+ tep_warning("could not load plugin '%s'\n%s\n",
+ plugin, dlerror());
+ goto out_free;
+ }
+
+ alias = dlsym(handle, TEP_PLUGIN_ALIAS_NAME);
+ if (!alias)
+ alias = file;
+
+ options = dlsym(handle, TEP_PLUGIN_OPTIONS_NAME);
+ if (options) {
+ while (options->name) {
+ ret = update_option(alias, options);
+ if (ret < 0)
+ goto out_free;
+ options++;
+ }
+ }
+
+ func = dlsym(handle, TEP_PLUGIN_LOADER_NAME);
+ if (!func) {
+ tep_warning("could not find func '%s' in plugin '%s'\n%s\n",
+ TEP_PLUGIN_LOADER_NAME, plugin, dlerror());
+ goto out_free;
+ }
+
+ list = malloc(sizeof(*list));
+ if (!list) {
+ tep_warning("could not allocate plugin memory\n");
+ goto out_free;
+ }
+
+ list->next = *plugin_list;
+ list->handle = handle;
+ list->name = plugin;
+ *plugin_list = list;
+
+ tep_info("registering plugin: %s", plugin);
+ func(tep);
+ return;
+
+ out_free:
+ free(plugin);
+}
+
+static void
+load_plugins_dir(struct tep_handle *tep, const char *suffix,
+ const char *path,
+ void (*load_plugin)(struct tep_handle *tep,
+ const char *path,
+ const char *name,
+ void *data),
+ void *data)
+{
+ struct dirent *dent;
+ struct stat st;
+ DIR *dir;
+ int ret;
+
+ ret = stat(path, &st);
+ if (ret < 0)
+ return;
+
+ if (!S_ISDIR(st.st_mode))
+ return;
+
+ dir = opendir(path);
+ if (!dir)
+ return;
+
+ while ((dent = readdir(dir))) {
+ const char *name = dent->d_name;
+
+ if (strcmp(name, ".") == 0 ||
+ strcmp(name, "..") == 0)
+ continue;
+
+ /* Only load plugins that end in suffix */
+ if (strcmp(name + (strlen(name) - strlen(suffix)), suffix) != 0)
+ continue;
+
+ load_plugin(tep, path, name, data);
+ }
+
+ closedir(dir);
+}
+
+/**
+ * tep_load_plugins_hook - call a user specified callback to load a plugin
+ * @tep: handler to traceevent context
+ * @suffix: filter only plugin files with given suffix
+ * @load_plugin: user specified callback, called for each plugin file
+ * @data: custom context, passed to @load_plugin
+ *
+ * Searches for traceevent plugin files and calls @load_plugin for each
+ * The order of plugins search is:
+ * - Directories, specified in @tep->plugins_dir and priority TEP_PLUGIN_FIRST
+ * - Directory, specified at compile time with PLUGIN_TRACEEVENT_DIR
+ * - Directory, specified by environment variable TRACEEVENT_PLUGIN_DIR
+ * - In user's home: ~/.local/lib/traceevent/plugins/
+ * - Directories, specified in @tep->plugins_dir and priority TEP_PLUGIN_LAST
+ *
+ */
+void tep_load_plugins_hook(struct tep_handle *tep, const char *suffix,
+ void (*load_plugin)(struct tep_handle *tep,
+ const char *path,
+ const char *name,
+ void *data),
+ void *data)
+{
+ struct tep_plugins_dir *dir = NULL;
+ char *home;
+ char *path;
+ char *envdir;
+ int ret;
+
+ if (tep && tep->flags & TEP_DISABLE_PLUGINS)
+ return;
+
+ if (tep)
+ dir = tep->plugins_dir;
+ while (dir) {
+ if (dir->prio == TEP_PLUGIN_FIRST)
+ load_plugins_dir(tep, suffix, dir->path,
+ load_plugin, data);
+ dir = dir->next;
+ }
+
+ /*
+ * If a system plugin directory was defined,
+ * check that first.
+ */
+#ifdef PLUGIN_DIR
+ if (!tep || !(tep->flags & TEP_DISABLE_SYS_PLUGINS))
+ load_plugins_dir(tep, suffix, PLUGIN_DIR,
+ load_plugin, data);
+#endif
+
+ /*
+ * Next let the environment-set plugin directory
+ * override the system defaults.
+ */
+ envdir = getenv("TRACEEVENT_PLUGIN_DIR");
+ if (envdir)
+ load_plugins_dir(tep, suffix, envdir, load_plugin, data);
+
+ /*
+ * Now let the home directory override the environment
+ * or system defaults.
+ */
+ home = getenv("HOME");
+ if (!home)
+ return;
+
+ ret = asprintf(&path, "%s/%s", home, LOCAL_PLUGIN_DIR);
+ if (ret < 0) {
+ tep_warning("could not allocate plugin memory\n");
+ return;
+ }
+
+ load_plugins_dir(tep, suffix, path, load_plugin, data);
+
+ if (tep)
+ dir = tep->plugins_dir;
+ while (dir) {
+ if (dir->prio == TEP_PLUGIN_LAST)
+ load_plugins_dir(tep, suffix, dir->path,
+ load_plugin, data);
+ dir = dir->next;
+ }
+
+ free(path);
+}
+
+struct tep_plugin_list*
+tep_load_plugins(struct tep_handle *tep)
+{
+ struct tep_plugin_list *list = NULL;
+
+ tep_load_plugins_hook(tep, ".so", load_plugin, &list);
+ return list;
+}
+
+/**
+ * tep_add_plugin_path - Add a new plugin directory.
+ * @tep: Trace event handler.
+ * @path: Path to a directory. All plugin files in that
+ * directory will be loaded.
+ *@prio: Load priority of the plugins in that directory.
+ *
+ * Returns -1 in case of an error, 0 otherwise.
+ */
+int tep_add_plugin_path(struct tep_handle *tep, char *path,
+ enum tep_plugin_load_priority prio)
+{
+ struct tep_plugins_dir *dir;
+
+ if (!tep || !path)
+ return -1;
+
+ dir = calloc(1, sizeof(*dir));
+ if (!dir)
+ return -1;
+
+ dir->path = strdup(path);
+ if (!dir->path) {
+ free(dir);
+ return -1;
+ }
+ dir->prio = prio;
+ dir->next = tep->plugins_dir;
+ tep->plugins_dir = dir;
+
+ return 0;
+}
+
+__hidden void free_tep_plugin_paths(struct tep_handle *tep)
+{
+ struct tep_plugins_dir *dir;
+
+ if (!tep)
+ return;
+
+ dir = tep->plugins_dir;
+ while (dir) {
+ tep->plugins_dir = tep->plugins_dir->next;
+ free(dir->path);
+ free(dir);
+ dir = tep->plugins_dir;
+ }
+}
+
+void
+tep_unload_plugins(struct tep_plugin_list *plugin_list, struct tep_handle *tep)
+{
+ tep_plugin_unload_func func;
+ struct tep_plugin_list *list;
+
+ while (plugin_list) {
+ list = plugin_list;
+ plugin_list = list->next;
+ func = dlsym(list->handle, TEP_PLUGIN_UNLOADER_NAME);
+ if (func)
+ func(tep);
+ dlclose(list->handle);
+ free(list->name);
+ free(list);
+ }
+}
diff --git a/src/kbuffer-parse.c b/src/kbuffer-parse.c
new file mode 100644
index 0000000..390a789
--- /dev/null
+++ b/src/kbuffer-parse.c
@@ -0,0 +1,848 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include <sys/utsname.h>
+
+#include "kbuffer.h"
+
+#define MISSING_EVENTS (1UL << 31)
+#define MISSING_STORED (1UL << 30)
+
+#define COMMIT_MASK ((1 << 27) - 1)
+
+/* Absolute time stamps do not have the 5 MSB, take from the real time stamp */
+#define TS_MSB (0xf8ULL << 56)
+
+enum {
+ KBUFFER_FL_HOST_BIG_ENDIAN = (1<<0),
+ KBUFFER_FL_BIG_ENDIAN = (1<<1),
+ KBUFFER_FL_LONG_8 = (1<<2),
+ KBUFFER_FL_OLD_FORMAT = (1<<3),
+};
+
+#define ENDIAN_MASK (KBUFFER_FL_HOST_BIG_ENDIAN | KBUFFER_FL_BIG_ENDIAN)
+
+/** kbuffer
+ * @timestamp - timestamp of current event
+ * @lost_events - # of lost events between this subbuffer and previous
+ * @flags - special flags of the kbuffer
+ * @subbuffer - pointer to the sub-buffer page
+ * @data - pointer to the start of data on the sub-buffer page
+ * @index - index from @data to the @curr event data
+ * @curr - offset from @data to the start of current event
+ * (includes metadata)
+ * @next - offset from @data to the start of next event
+ * @size - The size of data on @data
+ * @start - The offset from @subbuffer where @data lives
+ * @first - The offset from @subbuffer where the first non time stamp event lives
+ *
+ * @read_4 - Function to read 4 raw bytes (may swap)
+ * @read_8 - Function to read 8 raw bytes (may swap)
+ * @read_long - Function to read a long word (4 or 8 bytes with needed swap)
+ */
+struct kbuffer {
+ unsigned long long timestamp;
+ long long lost_events;
+ unsigned long flags;
+ void *subbuffer;
+ void *data;
+ unsigned int index;
+ unsigned int curr;
+ unsigned int next;
+ unsigned int size;
+ unsigned int start;
+ unsigned int first;
+
+ unsigned int (*read_4)(void *ptr);
+ unsigned long long (*read_8)(void *ptr);
+ unsigned long long (*read_long)(struct kbuffer *kbuf, void *ptr);
+ int (*next_event)(struct kbuffer *kbuf);
+};
+
+static void *zmalloc(size_t size)
+{
+ return calloc(1, size);
+}
+
+static int host_is_bigendian(void)
+{
+ unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
+ unsigned int *ptr;
+
+ ptr = (unsigned int *)str;
+ return *ptr == 0x01020304;
+}
+
+static int do_swap(struct kbuffer *kbuf)
+{
+ return ((kbuf->flags & KBUFFER_FL_HOST_BIG_ENDIAN) + kbuf->flags) &
+ ENDIAN_MASK;
+}
+
+static unsigned long long __read_8(void *ptr)
+{
+ unsigned long long data = *(unsigned long long *)ptr;
+
+ return data;
+}
+
+static unsigned long long __read_8_sw(void *ptr)
+{
+ unsigned long long data = *(unsigned long long *)ptr;
+ unsigned long long swap;
+
+ swap = ((data & 0xffULL) << 56) |
+ ((data & (0xffULL << 8)) << 40) |
+ ((data & (0xffULL << 16)) << 24) |
+ ((data & (0xffULL << 24)) << 8) |
+ ((data & (0xffULL << 32)) >> 8) |
+ ((data & (0xffULL << 40)) >> 24) |
+ ((data & (0xffULL << 48)) >> 40) |
+ ((data & (0xffULL << 56)) >> 56);
+
+ return swap;
+}
+
+static unsigned int __read_4(void *ptr)
+{
+ unsigned int data = *(unsigned int *)ptr;
+
+ return data;
+}
+
+static unsigned int __read_4_sw(void *ptr)
+{
+ unsigned int data = *(unsigned int *)ptr;
+ unsigned int swap;
+
+ swap = ((data & 0xffULL) << 24) |
+ ((data & (0xffULL << 8)) << 8) |
+ ((data & (0xffULL << 16)) >> 8) |
+ ((data & (0xffULL << 24)) >> 24);
+
+ return swap;
+}
+
+static unsigned long long read_8(struct kbuffer *kbuf, void *ptr)
+{
+ return kbuf->read_8(ptr);
+}
+
+static unsigned int read_4(struct kbuffer *kbuf, void *ptr)
+{
+ return kbuf->read_4(ptr);
+}
+
+static unsigned long long __read_long_8(struct kbuffer *kbuf, void *ptr)
+{
+ return kbuf->read_8(ptr);
+}
+
+static unsigned long long __read_long_4(struct kbuffer *kbuf, void *ptr)
+{
+ return kbuf->read_4(ptr);
+}
+
+static unsigned long long read_long(struct kbuffer *kbuf, void *ptr)
+{
+ return kbuf->read_long(kbuf, ptr);
+}
+
+static int calc_index(struct kbuffer *kbuf, void *ptr)
+{
+ return (unsigned long)ptr - (unsigned long)kbuf->data;
+}
+
+static int __next_event(struct kbuffer *kbuf);
+
+/*
+ * Just because sizeof(long) is 4 bytes, doesn't mean the OS isn't
+ * 64bits
+ */
+static bool host_is_32bit(void)
+{
+ struct utsname buf;
+ int ret;
+
+ ret = uname(&buf);
+ if (ret < 0) {
+ /* Oh well, just assume it is 32 bit */
+ return true;
+ }
+ /* If the uname machine value contains 64, assume the kernel is 64 bit */
+ return strstr(buf.machine, "64") == NULL;
+}
+
+/**
+ * kbuffer_alloc - allocat a new kbuffer
+ * @size; enum to denote size of word
+ * @endian: enum to denote endianness
+ *
+ * Allocates and returns a new kbuffer.
+ */
+struct kbuffer *
+kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian)
+{
+ struct kbuffer *kbuf;
+ int flags = 0;
+
+ switch (size) {
+ case KBUFFER_LSIZE_4:
+ break;
+ case KBUFFER_LSIZE_SAME_AS_HOST:
+ if (sizeof(long) != 8 && host_is_32bit())
+ break;
+ /* fallthrough */
+ case KBUFFER_LSIZE_8:
+ flags |= KBUFFER_FL_LONG_8;
+ break;
+ default:
+ return NULL;
+ }
+
+ switch (endian) {
+ case KBUFFER_ENDIAN_LITTLE:
+ case KBUFFER_ENDIAN_SAME_AS_HOST:
+ break;
+ case KBUFFER_ENDIAN_BIG:
+ flags |= KBUFFER_FL_BIG_ENDIAN;
+ break;
+ default:
+ return NULL;
+ }
+
+ kbuf = zmalloc(sizeof(*kbuf));
+ if (!kbuf)
+ return NULL;
+
+ kbuf->flags = flags;
+
+ if (host_is_bigendian()) {
+ if (endian == KBUFFER_ENDIAN_SAME_AS_HOST)
+ flags |= KBUFFER_FL_BIG_ENDIAN;
+ kbuf->flags |= KBUFFER_FL_HOST_BIG_ENDIAN;
+ }
+
+ if (do_swap(kbuf)) {
+ kbuf->read_8 = __read_8_sw;
+ kbuf->read_4 = __read_4_sw;
+ } else {
+ kbuf->read_8 = __read_8;
+ kbuf->read_4 = __read_4;
+ }
+
+ if (kbuf->flags & KBUFFER_FL_LONG_8)
+ kbuf->read_long = __read_long_8;
+ else
+ kbuf->read_long = __read_long_4;
+
+ /* May be changed by kbuffer_set_old_format() */
+ kbuf->next_event = __next_event;
+
+ return kbuf;
+}
+
+/** kbuffer_free - free an allocated kbuffer
+ * @kbuf: The kbuffer to free
+ *
+ * Can take NULL as a parameter.
+ */
+void kbuffer_free(struct kbuffer *kbuf)
+{
+ free(kbuf);
+}
+
+static unsigned int type4host(struct kbuffer *kbuf,
+ unsigned int type_len_ts)
+{
+ if (kbuf->flags & KBUFFER_FL_BIG_ENDIAN)
+ return (type_len_ts >> 29) & 3;
+ else
+ return type_len_ts & 3;
+}
+
+static unsigned int len4host(struct kbuffer *kbuf,
+ unsigned int type_len_ts)
+{
+ if (kbuf->flags & KBUFFER_FL_BIG_ENDIAN)
+ return (type_len_ts >> 27) & 7;
+ else
+ return (type_len_ts >> 2) & 7;
+}
+
+static unsigned int type_len4host(struct kbuffer *kbuf,
+ unsigned int type_len_ts)
+{
+ if (kbuf->flags & KBUFFER_FL_BIG_ENDIAN)
+ return (type_len_ts >> 27) & ((1 << 5) - 1);
+ else
+ return type_len_ts & ((1 << 5) - 1);
+}
+
+static unsigned int ts4host(struct kbuffer *kbuf,
+ unsigned int type_len_ts)
+{
+ if (kbuf->flags & KBUFFER_FL_BIG_ENDIAN)
+ return type_len_ts & ((1 << 27) - 1);
+ else
+ return type_len_ts >> 5;
+}
+
+/*
+ * Linux 2.6.30 and earlier (not much ealier) had a different
+ * ring buffer format. It should be obsolete, but we handle it anyway.
+ */
+enum old_ring_buffer_type {
+ OLD_RINGBUF_TYPE_PADDING,
+ OLD_RINGBUF_TYPE_TIME_EXTEND,
+ OLD_RINGBUF_TYPE_TIME_STAMP,
+ OLD_RINGBUF_TYPE_DATA,
+};
+
+static unsigned int old_update_pointers(struct kbuffer *kbuf)
+{
+ unsigned long long extend;
+ unsigned int type_len_ts;
+ unsigned int type;
+ unsigned int len;
+ unsigned int delta;
+ unsigned int length;
+ void *ptr = kbuf->data + kbuf->curr;
+
+ type_len_ts = read_4(kbuf, ptr);
+ ptr += 4;
+
+ type = type4host(kbuf, type_len_ts);
+ len = len4host(kbuf, type_len_ts);
+ delta = ts4host(kbuf, type_len_ts);
+
+ switch (type) {
+ case OLD_RINGBUF_TYPE_PADDING:
+ kbuf->next = kbuf->size;
+ return 0;
+
+ case OLD_RINGBUF_TYPE_TIME_EXTEND:
+ extend = read_4(kbuf, ptr);
+ extend <<= TS_SHIFT;
+ extend += delta;
+ delta = extend;
+ ptr += 4;
+ length = 0;
+ break;
+
+ case OLD_RINGBUF_TYPE_TIME_STAMP:
+ /* should never happen! */
+ kbuf->curr = kbuf->size;
+ kbuf->next = kbuf->size;
+ kbuf->index = kbuf->size;
+ return -1;
+ default:
+ if (len)
+ length = len * 4;
+ else {
+ length = read_4(kbuf, ptr);
+ length -= 4;
+ ptr += 4;
+ }
+ break;
+ }
+
+ kbuf->timestamp += delta;
+ kbuf->index = calc_index(kbuf, ptr);
+ kbuf->next = kbuf->index + length;
+
+ return type;
+}
+
+static int __old_next_event(struct kbuffer *kbuf)
+{
+ int type;
+
+ do {
+ kbuf->curr = kbuf->next;
+ if (kbuf->next >= kbuf->size)
+ return -1;
+ type = old_update_pointers(kbuf);
+ } while (type == OLD_RINGBUF_TYPE_TIME_EXTEND || type == OLD_RINGBUF_TYPE_PADDING);
+
+ return 0;
+}
+
+static unsigned int
+translate_data(struct kbuffer *kbuf, void *data, void **rptr,
+ unsigned long long *delta, int *length)
+{
+ unsigned long long extend, msb = 0;
+ unsigned int type_len_ts;
+ unsigned int type_len;
+
+ type_len_ts = read_4(kbuf, data);
+ data += 4;
+
+ type_len = type_len4host(kbuf, type_len_ts);
+ *delta = ts4host(kbuf, type_len_ts);
+
+ switch (type_len) {
+ case KBUFFER_TYPE_PADDING:
+ *length = read_4(kbuf, data);
+ break;
+
+ case KBUFFER_TYPE_TIME_STAMP:
+ msb = kbuf->timestamp & TS_MSB;
+ /* fall through */
+ case KBUFFER_TYPE_TIME_EXTEND:
+ extend = read_4(kbuf, data);
+ data += 4;
+ extend <<= TS_SHIFT;
+ extend += *delta;
+ *delta = extend | msb;
+ *length = 0;
+ break;
+
+ case 0:
+ *length = read_4(kbuf, data) - 4;
+ *length = (*length + 3) & ~3;
+ data += 4;
+ break;
+ default:
+ *length = type_len * 4;
+ break;
+ }
+
+ *rptr = data;
+
+ return type_len;
+}
+
+static unsigned int update_pointers(struct kbuffer *kbuf)
+{
+ unsigned long long delta;
+ unsigned int type_len;
+ int length;
+ void *ptr = kbuf->data + kbuf->curr;
+
+ type_len = translate_data(kbuf, ptr, &ptr, &delta, &length);
+
+ if (type_len == KBUFFER_TYPE_TIME_STAMP)
+ kbuf->timestamp = delta;
+ else
+ kbuf->timestamp += delta;
+
+ kbuf->index = calc_index(kbuf, ptr);
+ kbuf->next = kbuf->index + length;
+
+ return type_len;
+}
+
+/**
+ * kbuffer_translate_data - read raw data to get a record
+ * @swap: Set to 1 if bytes in words need to be swapped when read
+ * @data: The raw data to read
+ * @size: Address to store the size of the event data.
+ *
+ * Returns a pointer to the event data. To determine the entire
+ * record size (record metadata + data) just add the difference between
+ * @data and the returned value to @size.
+ */
+void *kbuffer_translate_data(int swap, void *data, unsigned int *size)
+{
+ unsigned long long delta;
+ struct kbuffer kbuf;
+ int type_len;
+ int length;
+ void *ptr;
+
+ if (swap) {
+ kbuf.read_8 = __read_8_sw;
+ kbuf.read_4 = __read_4_sw;
+ kbuf.flags = host_is_bigendian() ? 0 : KBUFFER_FL_BIG_ENDIAN;
+ } else {
+ kbuf.read_8 = __read_8;
+ kbuf.read_4 = __read_4;
+ kbuf.flags = host_is_bigendian() ? KBUFFER_FL_BIG_ENDIAN: 0;
+ }
+
+ type_len = translate_data(&kbuf, data, &ptr, &delta, &length);
+ switch (type_len) {
+ case KBUFFER_TYPE_PADDING:
+ case KBUFFER_TYPE_TIME_EXTEND:
+ case KBUFFER_TYPE_TIME_STAMP:
+ return NULL;
+ }
+
+ *size = length;
+
+ return ptr;
+}
+
+static int __next_event(struct kbuffer *kbuf)
+{
+ int type;
+
+ do {
+ kbuf->curr = kbuf->next;
+ if (kbuf->next >= kbuf->size)
+ return -1;
+ type = update_pointers(kbuf);
+ } while (type == KBUFFER_TYPE_TIME_EXTEND ||
+ type == KBUFFER_TYPE_TIME_STAMP ||
+ type == KBUFFER_TYPE_PADDING);
+
+ return 0;
+}
+
+static int next_event(struct kbuffer *kbuf)
+{
+ return kbuf->next_event(kbuf);
+}
+
+/**
+ * kbuffer_next_event - increment the current pointer
+ * @kbuf: The kbuffer to read
+ * @ts: Address to store the next record's timestamp (may be NULL to ignore)
+ *
+ * Increments the pointers into the subbuffer of the kbuffer to point to the
+ * next event so that the next kbuffer_read_event() will return a
+ * new event.
+ *
+ * Returns the data of the next event if a new event exists on the subbuffer,
+ * NULL otherwise.
+ */
+void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts)
+{
+ int ret;
+
+ if (!kbuf || !kbuf->subbuffer)
+ return NULL;
+
+ ret = next_event(kbuf);
+ if (ret < 0)
+ return NULL;
+
+ if (ts)
+ *ts = kbuf->timestamp;
+
+ return kbuf->data + kbuf->index;
+}
+
+/**
+ * kbuffer_load_subbuffer - load a new subbuffer into the kbuffer
+ * @kbuf: The kbuffer to load
+ * @subbuffer: The subbuffer to load into @kbuf.
+ *
+ * Load a new subbuffer (page) into @kbuf. This will reset all
+ * the pointers and update the @kbuf timestamp. The next read will
+ * return the first event on @subbuffer.
+ *
+ * Returns 0 on succes, -1 otherwise.
+ */
+int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer)
+{
+ unsigned long long flags;
+ void *ptr = subbuffer;
+
+ if (!kbuf || !subbuffer)
+ return -1;
+
+ kbuf->subbuffer = subbuffer;
+
+ kbuf->timestamp = read_8(kbuf, ptr);
+ ptr += 8;
+
+ kbuf->curr = 0;
+
+ if (kbuf->flags & KBUFFER_FL_LONG_8)
+ kbuf->start = 16;
+ else
+ kbuf->start = 12;
+
+ kbuf->data = subbuffer + kbuf->start;
+
+ flags = read_long(kbuf, ptr);
+ kbuf->size = (unsigned int)flags & COMMIT_MASK;
+
+ if (flags & MISSING_EVENTS) {
+ if (flags & MISSING_STORED) {
+ ptr = kbuf->data + kbuf->size;
+ kbuf->lost_events = read_long(kbuf, ptr);
+ } else
+ kbuf->lost_events = -1;
+ } else
+ kbuf->lost_events = 0;
+
+ kbuf->index = 0;
+ kbuf->next = 0;
+
+ next_event(kbuf);
+
+ /* save the first record from the page */
+ kbuf->first = kbuf->curr;
+
+ return 0;
+}
+
+/**
+ * kbuffer_subbuf_timestamp - read the timestamp from a sub buffer
+ * @kbuf: The kbuffer to load
+ * @subbuf: The subbuffer to read from.
+ *
+ * Return the timestamp from a subbuffer.
+ */
+unsigned long long kbuffer_subbuf_timestamp(struct kbuffer *kbuf, void *subbuf)
+{
+ return kbuf->read_8(subbuf);
+}
+
+/**
+ * kbuffer_ptr_delta - read the delta field from a record
+ * @kbuf: The kbuffer to load
+ * @ptr: The record in the buffe.
+ *
+ * Return the timestamp delta from a record
+ */
+unsigned int kbuffer_ptr_delta(struct kbuffer *kbuf, void *ptr)
+{
+ unsigned int type_len_ts;
+
+ type_len_ts = read_4(kbuf, ptr);
+ return ts4host(kbuf, type_len_ts);
+}
+
+
+/**
+ * kbuffer_read_event - read the next event in the kbuffer subbuffer
+ * @kbuf: The kbuffer to read from
+ * @ts: The address to store the timestamp of the event (may be NULL to ignore)
+ *
+ * Returns a pointer to the data part of the current event.
+ * NULL if no event is left on the subbuffer.
+ */
+void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts)
+{
+ if (!kbuf || !kbuf->subbuffer)
+ return NULL;
+
+ if (kbuf->curr >= kbuf->size)
+ return NULL;
+
+ if (ts)
+ *ts = kbuf->timestamp;
+ return kbuf->data + kbuf->index;
+}
+
+/**
+ * kbuffer_timestamp - Return the timestamp of the current event
+ * @kbuf: The kbuffer to read from
+ *
+ * Returns the timestamp of the current (next) event.
+ */
+unsigned long long kbuffer_timestamp(struct kbuffer *kbuf)
+{
+ return kbuf->timestamp;
+}
+
+/**
+ * kbuffer_read_at_offset - read the event that is at offset
+ * @kbuf: The kbuffer to read from
+ * @offset: The offset into the subbuffer
+ * @ts: The address to store the timestamp of the event (may be NULL to ignore)
+ *
+ * The @offset must be an index from the @kbuf subbuffer beginning.
+ * If @offset is bigger than the stored subbuffer, NULL will be returned.
+ *
+ * Returns the data of the record that is at @offset. Note, @offset does
+ * not need to be the start of the record, the offset just needs to be
+ * in the record (or beginning of it).
+ *
+ * Note, the kbuf timestamp and pointers are updated to the
+ * returned record. That is, kbuffer_read_event() will return the same
+ * data and timestamp, and kbuffer_next_event() will increment from
+ * this record.
+ */
+void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset,
+ unsigned long long *ts)
+{
+ void *data;
+
+ if (offset < kbuf->start)
+ offset = 0;
+ else
+ offset -= kbuf->start;
+
+ /* Reset the buffer */
+ kbuffer_load_subbuffer(kbuf, kbuf->subbuffer);
+ data = kbuffer_read_event(kbuf, ts);
+
+ while (kbuf->curr < offset) {
+ data = kbuffer_next_event(kbuf, ts);
+ if (!data)
+ break;
+ }
+
+ return data;
+}
+
+/**
+ * kbuffer_subbuffer_size - the size of the loaded subbuffer
+ * @kbuf: The kbuffer to read from
+ *
+ * Returns the size of the subbuffer. Note, this size is
+ * where the last event resides. The stored subbuffer may actually be
+ * bigger due to padding and such.
+ */
+int kbuffer_subbuffer_size(struct kbuffer *kbuf)
+{
+ return kbuf->size;
+}
+
+/**
+ * kbuffer_curr_index - Return the index of the record
+ * @kbuf: The kbuffer to read from
+ *
+ * Returns the index from the start of the data part of
+ * the subbuffer to the current location. Note this is not
+ * from the start of the subbuffer. An index of zero will
+ * point to the first record. Use kbuffer_curr_offset() for
+ * the actually offset (that can be used by kbuffer_read_at_offset())
+ */
+int kbuffer_curr_index(struct kbuffer *kbuf)
+{
+ return kbuf->curr;
+}
+
+/**
+ * kbuffer_curr_offset - Return the offset of the record
+ * @kbuf: The kbuffer to read from
+ *
+ * Returns the offset from the start of the subbuffer to the
+ * current location.
+ */
+int kbuffer_curr_offset(struct kbuffer *kbuf)
+{
+ return kbuf->curr + kbuf->start;
+}
+
+/**
+ * kbuffer_event_size - return the size of the event data
+ * @kbuf: The kbuffer to read
+ *
+ * Returns the size of the event data (the payload not counting
+ * the meta data of the record) of the current event.
+ */
+int kbuffer_event_size(struct kbuffer *kbuf)
+{
+ return kbuf->next - kbuf->index;
+}
+
+/**
+ * kbuffer_curr_size - return the size of the entire record
+ * @kbuf: The kbuffer to read
+ *
+ * Returns the size of the entire record (meta data and payload)
+ * of the current event.
+ */
+int kbuffer_curr_size(struct kbuffer *kbuf)
+{
+ return kbuf->next - kbuf->curr;
+}
+
+/**
+ * kbuffer_missed_events - return the # of missed events from last event.
+ * @kbuf: The kbuffer to read from
+ *
+ * Returns the # of missed events (if recorded) before the current
+ * event. Note, only events on the beginning of a subbuffer can
+ * have missed events, all other events within the buffer will be
+ * zero.
+ */
+int kbuffer_missed_events(struct kbuffer *kbuf)
+{
+ /* Only the first event can have missed events */
+ if (kbuf->curr)
+ return 0;
+
+ return kbuf->lost_events;
+}
+
+/**
+ * kbuffer_set_old_forma - set the kbuffer to use the old format parsing
+ * @kbuf: The kbuffer to set
+ *
+ * This is obsolete (or should be). The first kernels to use the
+ * new ring buffer had a slightly different ring buffer format
+ * (2.6.30 and earlier). It is still somewhat supported by kbuffer,
+ * but should not be counted on in the future.
+ */
+void kbuffer_set_old_format(struct kbuffer *kbuf)
+{
+ kbuf->flags |= KBUFFER_FL_OLD_FORMAT;
+
+ kbuf->next_event = __old_next_event;
+}
+
+/**
+ * kbuffer_start_of_data - return offset of where data starts on subbuffer
+ * @kbuf: The kbuffer
+ *
+ * Returns the location on the subbuffer where the data starts.
+ */
+int kbuffer_start_of_data(struct kbuffer *kbuf)
+{
+ return kbuf->first + kbuf->start;
+}
+
+/**
+ * kbuffer_raw_get - get raw buffer info
+ * @kbuf: The kbuffer
+ * @subbuf: Start of mapped subbuffer
+ * @info: Info descriptor to fill in
+ *
+ * For debugging. This can return internals of the ring buffer.
+ * Expects to have info->next set to what it will read.
+ * The type, length and timestamp delta will be filled in, and
+ * @info->next will be updated to the next element.
+ * The @subbuf is used to know if the info is passed the end of
+ * data and NULL will be returned if it is.
+ */
+struct kbuffer_raw_info *
+kbuffer_raw_get(struct kbuffer *kbuf, void *subbuf, struct kbuffer_raw_info *info)
+{
+ unsigned long long flags;
+ unsigned long long delta;
+ unsigned int type_len;
+ unsigned int size;
+ int start;
+ int length;
+ void *ptr = info->next;
+
+ if (!kbuf || !subbuf)
+ return NULL;
+
+ if (kbuf->flags & KBUFFER_FL_LONG_8)
+ start = 16;
+ else
+ start = 12;
+
+ flags = read_long(kbuf, subbuf + 8);
+ size = (unsigned int)flags & COMMIT_MASK;
+
+ if (ptr < subbuf || ptr >= subbuf + start + size)
+ return NULL;
+
+ type_len = translate_data(kbuf, ptr, &ptr, &delta, &length);
+
+ info->next = ptr + length;
+
+ info->type = type_len;
+ info->delta = delta;
+ info->length = length;
+
+ return info;
+}
diff --git a/src/parse-filter.c b/src/parse-filter.c
new file mode 100644
index 0000000..e448ee2
--- /dev/null
+++ b/src/parse-filter.c
@@ -0,0 +1,2283 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include "event-parse.h"
+#include "event-parse-local.h"
+#include "event-utils.h"
+
+#define COMM "COMM"
+#define CPU "CPU"
+
+static struct tep_format_field comm = {
+ .name = "COMM",
+};
+
+static struct tep_format_field cpu = {
+ .name = "CPU",
+};
+
+struct event_list {
+ struct event_list *next;
+ struct tep_event *event;
+};
+
+static void show_error(struct tep_handle *tep, char *error_buf, const char *fmt, ...)
+{
+ unsigned long long index;
+ const char *input;
+ va_list ap;
+ int len;
+ int i;
+
+ input = get_input_buf(tep);
+ index = get_input_buf_ptr(tep);
+ len = input ? strlen(input) : 0;
+
+ if (len) {
+ strcpy(error_buf, input);
+ error_buf[len] = '\n';
+ for (i = 1; i < len && i < index; i++)
+ error_buf[len+i] = ' ';
+ error_buf[len + i] = '^';
+ error_buf[len + i + 1] = '\n';
+ len += i+2;
+ }
+
+ va_start(ap, fmt);
+ vsnprintf(error_buf + len, TEP_FILTER_ERROR_BUFSZ - len, fmt, ap);
+ va_end(ap);
+}
+
+static enum tep_event_type filter_read_token(struct tep_handle *tep, char **tok)
+{
+ enum tep_event_type type;
+ char *token = NULL;
+
+ do {
+ free_token(token);
+ type = read_token(tep, &token);
+ } while (type == TEP_EVENT_NEWLINE || type == TEP_EVENT_SPACE);
+
+ /* If token is = or ! check to see if the next char is ~ */
+ if (token &&
+ (strcmp(token, "=") == 0 || strcmp(token, "!") == 0) &&
+ peek_char(tep) == '~') {
+ /* append it */
+ *tok = malloc(3);
+ if (*tok == NULL) {
+ free_token(token);
+ return TEP_EVENT_ERROR;
+ }
+ sprintf(*tok, "%c%c", *token, '~');
+ free_token(token);
+ /* Now remove the '~' from the buffer */
+ read_token(tep, &token);
+ free_token(token);
+ } else
+ *tok = token;
+
+ return type;
+}
+
+static int filter_cmp(const void *a, const void *b)
+{
+ const struct tep_filter_type *ea = a;
+ const struct tep_filter_type *eb = b;
+
+ if (ea->event_id < eb->event_id)
+ return -1;
+
+ if (ea->event_id > eb->event_id)
+ return 1;
+
+ return 0;
+}
+
+static struct tep_filter_type *
+find_filter_type(struct tep_event_filter *filter, int id)
+{
+ struct tep_filter_type *filter_type;
+ struct tep_filter_type key;
+
+ key.event_id = id;
+
+ filter_type = bsearch(&key, filter->event_filters,
+ filter->filters,
+ sizeof(*filter->event_filters),
+ filter_cmp);
+
+ return filter_type;
+}
+
+static struct tep_filter_type *
+add_filter_type(struct tep_event_filter *filter, int id)
+{
+ struct tep_filter_type *filter_type;
+ int i;
+
+ filter_type = find_filter_type(filter, id);
+ if (filter_type)
+ return filter_type;
+
+ filter_type = realloc(filter->event_filters,
+ sizeof(*filter->event_filters) *
+ (filter->filters + 1));
+ if (!filter_type)
+ return NULL;
+
+ filter->event_filters = filter_type;
+
+ for (i = 0; i < filter->filters; i++) {
+ if (filter->event_filters[i].event_id > id)
+ break;
+ }
+
+ if (i < filter->filters)
+ memmove(&filter->event_filters[i+1],
+ &filter->event_filters[i],
+ sizeof(*filter->event_filters) *
+ (filter->filters - i));
+
+ filter_type = &filter->event_filters[i];
+ filter_type->event_id = id;
+ filter_type->event = tep_find_event(filter->tep, id);
+ filter_type->filter = NULL;
+
+ filter->filters++;
+
+ return filter_type;
+}
+
+/**
+ * tep_filter_alloc - create a new event filter
+ * @tep: The tep that this filter is associated with
+ */
+struct tep_event_filter *tep_filter_alloc(struct tep_handle *tep)
+{
+ struct tep_event_filter *filter;
+
+ filter = malloc(sizeof(*filter));
+ if (filter == NULL)
+ return NULL;
+
+ memset(filter, 0, sizeof(*filter));
+ filter->tep = tep;
+ tep_ref(tep);
+
+ return filter;
+}
+
+static struct tep_filter_arg *allocate_arg(void)
+{
+ return calloc(1, sizeof(struct tep_filter_arg));
+}
+
+static void free_arg(struct tep_filter_arg *arg)
+{
+ if (!arg)
+ return;
+
+ switch (arg->type) {
+ case TEP_FILTER_ARG_NONE:
+ case TEP_FILTER_ARG_BOOLEAN:
+ break;
+
+ case TEP_FILTER_ARG_NUM:
+ free_arg(arg->num.left);
+ free_arg(arg->num.right);
+ break;
+
+ case TEP_FILTER_ARG_EXP:
+ free_arg(arg->exp.left);
+ free_arg(arg->exp.right);
+ break;
+
+ case TEP_FILTER_ARG_STR:
+ free(arg->str.val);
+ regfree(&arg->str.reg);
+ free(arg->str.buffer);
+ break;
+
+ case TEP_FILTER_ARG_VALUE:
+ if (arg->value.type == TEP_FILTER_STRING ||
+ arg->value.type == TEP_FILTER_CHAR)
+ free(arg->value.str);
+ break;
+
+ case TEP_FILTER_ARG_OP:
+ free_arg(arg->op.left);
+ free_arg(arg->op.right);
+ default:
+ break;
+ }
+
+ free(arg);
+}
+
+static int add_event(struct event_list **events,
+ struct tep_event *event)
+{
+ struct event_list *list;
+
+ list = malloc(sizeof(*list));
+ if (list == NULL)
+ return -1;
+
+ list->next = *events;
+ *events = list;
+ list->event = event;
+ return 0;
+}
+
+static int event_match(struct tep_event *event,
+ regex_t *sreg, regex_t *ereg)
+{
+ if (sreg) {
+ return !regexec(sreg, event->system, 0, NULL, 0) &&
+ !regexec(ereg, event->name, 0, NULL, 0);
+ }
+
+ return !regexec(ereg, event->system, 0, NULL, 0) ||
+ !regexec(ereg, event->name, 0, NULL, 0);
+}
+
+static enum tep_errno
+find_event(struct tep_handle *tep, struct event_list **events,
+ char *sys_name, char *event_name)
+{
+ struct tep_event *event;
+ regex_t ereg;
+ regex_t sreg;
+ int match = 0;
+ int fail = 0;
+ char *reg;
+ int ret;
+ int i;
+
+ if (!event_name) {
+ /* if no name is given, then swap sys and name */
+ event_name = sys_name;
+ sys_name = NULL;
+ }
+
+ ret = asprintf(®, "^%s$", event_name);
+ if (ret < 0)
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+
+ ret = regcomp(&ereg, reg, REG_ICASE|REG_NOSUB);
+ free(reg);
+
+ if (ret)
+ return TEP_ERRNO__INVALID_EVENT_NAME;
+
+ if (sys_name) {
+ ret = asprintf(®, "^%s$", sys_name);
+ if (ret < 0) {
+ regfree(&ereg);
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ ret = regcomp(&sreg, reg, REG_ICASE|REG_NOSUB);
+ free(reg);
+ if (ret) {
+ regfree(&ereg);
+ return TEP_ERRNO__INVALID_EVENT_NAME;
+ }
+ }
+
+ for (i = 0; i < tep->nr_events; i++) {
+ event = tep->events[i];
+ if (event_match(event, sys_name ? &sreg : NULL, &ereg)) {
+ match = 1;
+ if (add_event(events, event) < 0) {
+ fail = 1;
+ break;
+ }
+ }
+ }
+
+ regfree(&ereg);
+ if (sys_name)
+ regfree(&sreg);
+
+ if (!match)
+ return TEP_ERRNO__EVENT_NOT_FOUND;
+ if (fail)
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+
+ return 0;
+}
+
+static void free_events(struct event_list *events)
+{
+ struct event_list *event;
+
+ while (events) {
+ event = events;
+ events = events->next;
+ free(event);
+ }
+}
+
+static enum tep_errno
+create_arg_item(struct tep_event *event, const char *token,
+ enum tep_event_type type, struct tep_filter_arg **parg, char *error_str)
+{
+ struct tep_format_field *field;
+ struct tep_filter_arg *arg;
+
+ arg = allocate_arg();
+ if (arg == NULL) {
+ show_error(event->tep, error_str, "failed to allocate filter arg");
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ switch (type) {
+
+ case TEP_EVENT_SQUOTE:
+ case TEP_EVENT_DQUOTE:
+ arg->type = TEP_FILTER_ARG_VALUE;
+ arg->value.type =
+ type == TEP_EVENT_DQUOTE ? TEP_FILTER_STRING : TEP_FILTER_CHAR;
+ arg->value.str = strdup(token);
+ if (!arg->value.str) {
+ free_arg(arg);
+ show_error(event->tep, error_str, "failed to allocate string filter arg");
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+ break;
+ case TEP_EVENT_ITEM:
+ /* if it is a number, then convert it */
+ if (isdigit(token[0])) {
+ arg->type = TEP_FILTER_ARG_VALUE;
+ arg->value.type = TEP_FILTER_NUMBER;
+ arg->value.val = strtoull(token, NULL, 0);
+ break;
+ }
+ /* Consider this a field */
+ field = tep_find_any_field(event, token);
+ if (!field) {
+ /* If token is 'COMM' or 'CPU' then it is special */
+ if (strcmp(token, COMM) == 0) {
+ field = &comm;
+ } else if (strcmp(token, CPU) == 0) {
+ field = &cpu;
+ } else {
+ /* not a field, Make it false */
+ arg->type = TEP_FILTER_ARG_BOOLEAN;
+ arg->boolean.value = TEP_FILTER_FALSE;
+ break;
+ }
+ }
+ arg->type = TEP_FILTER_ARG_FIELD;
+ arg->field.field = field;
+ break;
+ default:
+ free_arg(arg);
+ show_error(event->tep, error_str, "expected a value but found %s", token);
+ return TEP_ERRNO__UNEXPECTED_TYPE;
+ }
+ *parg = arg;
+ return 0;
+}
+
+static struct tep_filter_arg *
+create_arg_op(enum tep_filter_op_type btype)
+{
+ struct tep_filter_arg *arg;
+
+ arg = allocate_arg();
+ if (!arg)
+ return NULL;
+
+ arg->type = TEP_FILTER_ARG_OP;
+ arg->op.type = btype;
+
+ return arg;
+}
+
+static struct tep_filter_arg *
+create_arg_exp(enum tep_filter_exp_type etype)
+{
+ struct tep_filter_arg *arg;
+
+ arg = allocate_arg();
+ if (!arg)
+ return NULL;
+
+ arg->type = TEP_FILTER_ARG_EXP;
+ arg->exp.type = etype;
+
+ return arg;
+}
+
+static struct tep_filter_arg *
+create_arg_cmp(enum tep_filter_cmp_type ctype)
+{
+ struct tep_filter_arg *arg;
+
+ arg = allocate_arg();
+ if (!arg)
+ return NULL;
+
+ /* Use NUM and change if necessary */
+ arg->type = TEP_FILTER_ARG_NUM;
+ arg->num.type = ctype;
+
+ return arg;
+}
+
+static enum tep_errno
+add_right(struct tep_handle *tep, struct tep_filter_arg *op,
+ struct tep_filter_arg *arg, char *error_str)
+{
+ struct tep_filter_arg *left;
+ char *str;
+ int op_type;
+ int ret;
+
+ switch (op->type) {
+ case TEP_FILTER_ARG_EXP:
+ if (op->exp.right)
+ goto out_fail;
+ op->exp.right = arg;
+ break;
+
+ case TEP_FILTER_ARG_OP:
+ if (op->op.right)
+ goto out_fail;
+ op->op.right = arg;
+ break;
+
+ case TEP_FILTER_ARG_NUM:
+ if (op->op.right)
+ goto out_fail;
+ /*
+ * The arg must be num, str, or field
+ */
+ switch (arg->type) {
+ case TEP_FILTER_ARG_VALUE:
+ case TEP_FILTER_ARG_FIELD:
+ break;
+ default:
+ show_error(tep, error_str, "Illegal rvalue");
+ return TEP_ERRNO__ILLEGAL_RVALUE;
+ }
+
+ /*
+ * Depending on the type, we may need to
+ * convert this to a string or regex.
+ */
+ switch (arg->value.type) {
+ case TEP_FILTER_CHAR:
+ /*
+ * A char should be converted to number if
+ * the string is 1 byte, and the compare
+ * is not a REGEX.
+ */
+ if (strlen(arg->value.str) == 1 &&
+ op->num.type != TEP_FILTER_CMP_REGEX &&
+ op->num.type != TEP_FILTER_CMP_NOT_REGEX) {
+ arg->value.type = TEP_FILTER_NUMBER;
+ goto do_int;
+ }
+ /* fall through */
+ case TEP_FILTER_STRING:
+
+ /* convert op to a string arg */
+ op_type = op->num.type;
+ left = op->num.left;
+ str = arg->value.str;
+
+ /* reset the op for the new field */
+ memset(op, 0, sizeof(*op));
+
+ /*
+ * If left arg was a field not found then
+ * NULL the entire op.
+ */
+ if (left->type == TEP_FILTER_ARG_BOOLEAN) {
+ free_arg(left);
+ free_arg(arg);
+ op->type = TEP_FILTER_ARG_BOOLEAN;
+ op->boolean.value = TEP_FILTER_FALSE;
+ break;
+ }
+
+ /* Left arg must be a field */
+ if (left->type != TEP_FILTER_ARG_FIELD) {
+ show_error(tep, error_str,
+ "Illegal lvalue for string comparison");
+ return TEP_ERRNO__ILLEGAL_LVALUE;
+ }
+
+ /* Make sure this is a valid string compare */
+ switch (op_type) {
+ case TEP_FILTER_CMP_EQ:
+ op_type = TEP_FILTER_CMP_MATCH;
+ break;
+ case TEP_FILTER_CMP_NE:
+ op_type = TEP_FILTER_CMP_NOT_MATCH;
+ break;
+
+ case TEP_FILTER_CMP_REGEX:
+ case TEP_FILTER_CMP_NOT_REGEX:
+ ret = regcomp(&op->str.reg, str, REG_ICASE|REG_NOSUB);
+ if (ret) {
+ show_error(tep, error_str,
+ "RegEx '%s' did not compute",
+ str);
+ return TEP_ERRNO__INVALID_REGEX;
+ }
+ break;
+ default:
+ show_error(tep, error_str,
+ "Illegal comparison for string");
+ return TEP_ERRNO__ILLEGAL_STRING_CMP;
+ }
+
+ op->type = TEP_FILTER_ARG_STR;
+ op->str.type = op_type;
+ op->str.field = left->field.field;
+ op->str.val = strdup(str);
+ if (!op->str.val) {
+ show_error(tep, error_str, "Failed to allocate string filter");
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+ /*
+ * Need a buffer to copy data for tests
+ */
+ op->str.buffer = malloc(op->str.field->size + 1);
+ if (!op->str.buffer) {
+ show_error(tep, error_str, "Failed to allocate string filter");
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+ /* Null terminate this buffer */
+ op->str.buffer[op->str.field->size] = 0;
+
+ /* We no longer have left or right args */
+ free_arg(arg);
+ free_arg(left);
+
+ break;
+
+ case TEP_FILTER_NUMBER:
+
+ do_int:
+ switch (op->num.type) {
+ case TEP_FILTER_CMP_REGEX:
+ case TEP_FILTER_CMP_NOT_REGEX:
+ show_error(tep, error_str,
+ "Op not allowed with integers");
+ return TEP_ERRNO__ILLEGAL_INTEGER_CMP;
+
+ default:
+ break;
+ }
+
+ /* numeric compare */
+ op->num.right = arg;
+ break;
+ default:
+ goto out_fail;
+ }
+ break;
+ default:
+ goto out_fail;
+ }
+
+ return 0;
+
+ out_fail:
+ show_error(tep, error_str, "Syntax error");
+ return TEP_ERRNO__SYNTAX_ERROR;
+}
+
+static struct tep_filter_arg *
+rotate_op_right(struct tep_filter_arg *a, struct tep_filter_arg *b)
+{
+ struct tep_filter_arg *arg;
+
+ arg = a->op.right;
+ a->op.right = b;
+ return arg;
+}
+
+static enum tep_errno add_left(struct tep_filter_arg *op, struct tep_filter_arg *arg)
+{
+ switch (op->type) {
+ case TEP_FILTER_ARG_EXP:
+ if (arg->type == TEP_FILTER_ARG_OP)
+ arg = rotate_op_right(arg, op);
+ op->exp.left = arg;
+ break;
+
+ case TEP_FILTER_ARG_OP:
+ op->op.left = arg;
+ break;
+ case TEP_FILTER_ARG_NUM:
+ if (arg->type == TEP_FILTER_ARG_OP)
+ arg = rotate_op_right(arg, op);
+
+ /* left arg of compares must be a field */
+ if (arg->type != TEP_FILTER_ARG_FIELD &&
+ arg->type != TEP_FILTER_ARG_BOOLEAN)
+ return TEP_ERRNO__INVALID_ARG_TYPE;
+ op->num.left = arg;
+ break;
+ default:
+ return TEP_ERRNO__INVALID_ARG_TYPE;
+ }
+ return 0;
+}
+
+enum op_type {
+ OP_NONE,
+ OP_BOOL,
+ OP_NOT,
+ OP_EXP,
+ OP_CMP,
+};
+
+static enum op_type process_op(const char *token,
+ enum tep_filter_op_type *btype,
+ enum tep_filter_cmp_type *ctype,
+ enum tep_filter_exp_type *etype)
+{
+ *btype = TEP_FILTER_OP_NOT;
+ *etype = TEP_FILTER_EXP_NONE;
+ *ctype = TEP_FILTER_CMP_NONE;
+
+ if (strcmp(token, "&&") == 0)
+ *btype = TEP_FILTER_OP_AND;
+ else if (strcmp(token, "||") == 0)
+ *btype = TEP_FILTER_OP_OR;
+ else if (strcmp(token, "!") == 0)
+ return OP_NOT;
+
+ if (*btype != TEP_FILTER_OP_NOT)
+ return OP_BOOL;
+
+ /* Check for value expressions */
+ if (strcmp(token, "+") == 0) {
+ *etype = TEP_FILTER_EXP_ADD;
+ } else if (strcmp(token, "-") == 0) {
+ *etype = TEP_FILTER_EXP_SUB;
+ } else if (strcmp(token, "*") == 0) {
+ *etype = TEP_FILTER_EXP_MUL;
+ } else if (strcmp(token, "/") == 0) {
+ *etype = TEP_FILTER_EXP_DIV;
+ } else if (strcmp(token, "%") == 0) {
+ *etype = TEP_FILTER_EXP_MOD;
+ } else if (strcmp(token, ">>") == 0) {
+ *etype = TEP_FILTER_EXP_RSHIFT;
+ } else if (strcmp(token, "<<") == 0) {
+ *etype = TEP_FILTER_EXP_LSHIFT;
+ } else if (strcmp(token, "&") == 0) {
+ *etype = TEP_FILTER_EXP_AND;
+ } else if (strcmp(token, "|") == 0) {
+ *etype = TEP_FILTER_EXP_OR;
+ } else if (strcmp(token, "^") == 0) {
+ *etype = TEP_FILTER_EXP_XOR;
+ } else if (strcmp(token, "~") == 0)
+ *etype = TEP_FILTER_EXP_NOT;
+
+ if (*etype != TEP_FILTER_EXP_NONE)
+ return OP_EXP;
+
+ /* Check for compares */
+ if (strcmp(token, "==") == 0)
+ *ctype = TEP_FILTER_CMP_EQ;
+ else if (strcmp(token, "!=") == 0)
+ *ctype = TEP_FILTER_CMP_NE;
+ else if (strcmp(token, "<") == 0)
+ *ctype = TEP_FILTER_CMP_LT;
+ else if (strcmp(token, ">") == 0)
+ *ctype = TEP_FILTER_CMP_GT;
+ else if (strcmp(token, "<=") == 0)
+ *ctype = TEP_FILTER_CMP_LE;
+ else if (strcmp(token, ">=") == 0)
+ *ctype = TEP_FILTER_CMP_GE;
+ else if (strcmp(token, "=~") == 0)
+ *ctype = TEP_FILTER_CMP_REGEX;
+ else if (strcmp(token, "!~") == 0)
+ *ctype = TEP_FILTER_CMP_NOT_REGEX;
+ else
+ return OP_NONE;
+
+ return OP_CMP;
+}
+
+static int check_op_done(struct tep_filter_arg *arg)
+{
+ switch (arg->type) {
+ case TEP_FILTER_ARG_EXP:
+ return arg->exp.right != NULL;
+
+ case TEP_FILTER_ARG_OP:
+ return arg->op.right != NULL;
+
+ case TEP_FILTER_ARG_NUM:
+ return arg->num.right != NULL;
+
+ case TEP_FILTER_ARG_STR:
+ /* A string conversion is always done */
+ return 1;
+
+ case TEP_FILTER_ARG_BOOLEAN:
+ /* field not found, is ok */
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+enum filter_vals {
+ FILTER_VAL_NORM,
+ FILTER_VAL_FALSE,
+ FILTER_VAL_TRUE,
+};
+
+static enum tep_errno
+reparent_op_arg(struct tep_handle *tep, struct tep_filter_arg *parent,
+ struct tep_filter_arg *old_child, struct tep_filter_arg *arg,
+ char *error_str)
+{
+ struct tep_filter_arg *other_child;
+ struct tep_filter_arg **ptr;
+
+ if (parent->type != TEP_FILTER_ARG_OP &&
+ arg->type != TEP_FILTER_ARG_OP) {
+ show_error(tep, error_str, "can not reparent other than OP");
+ return TEP_ERRNO__REPARENT_NOT_OP;
+ }
+
+ /* Get the sibling */
+ if (old_child->op.right == arg) {
+ ptr = &old_child->op.right;
+ other_child = old_child->op.left;
+ } else if (old_child->op.left == arg) {
+ ptr = &old_child->op.left;
+ other_child = old_child->op.right;
+ } else {
+ show_error(tep, error_str, "Error in reparent op, find other child");
+ return TEP_ERRNO__REPARENT_FAILED;
+ }
+
+ /* Detach arg from old_child */
+ *ptr = NULL;
+
+ /* Check for root */
+ if (parent == old_child) {
+ free_arg(other_child);
+ *parent = *arg;
+ /* Free arg without recussion */
+ free(arg);
+ return 0;
+ }
+
+ if (parent->op.right == old_child)
+ ptr = &parent->op.right;
+ else if (parent->op.left == old_child)
+ ptr = &parent->op.left;
+ else {
+ show_error(tep, error_str, "Error in reparent op");
+ return TEP_ERRNO__REPARENT_FAILED;
+ }
+
+ *ptr = arg;
+
+ free_arg(old_child);
+ return 0;
+}
+
+/* Returns either filter_vals (success) or tep_errno (failfure) */
+static int test_arg(struct tep_handle *tep, struct tep_filter_arg *parent,
+ struct tep_filter_arg *arg, char *error_str)
+{
+ int lval, rval;
+
+ switch (arg->type) {
+
+ /* bad case */
+ case TEP_FILTER_ARG_BOOLEAN:
+ return FILTER_VAL_FALSE + arg->boolean.value;
+
+ /* good cases: */
+ case TEP_FILTER_ARG_STR:
+ case TEP_FILTER_ARG_VALUE:
+ case TEP_FILTER_ARG_FIELD:
+ return FILTER_VAL_NORM;
+
+ case TEP_FILTER_ARG_EXP:
+ lval = test_arg(tep, arg, arg->exp.left, error_str);
+ if (lval != FILTER_VAL_NORM)
+ return lval;
+ rval = test_arg(tep, arg, arg->exp.right, error_str);
+ if (rval != FILTER_VAL_NORM)
+ return rval;
+ return FILTER_VAL_NORM;
+
+ case TEP_FILTER_ARG_NUM:
+ lval = test_arg(tep, arg, arg->num.left, error_str);
+ if (lval != FILTER_VAL_NORM)
+ return lval;
+ rval = test_arg(tep, arg, arg->num.right, error_str);
+ if (rval != FILTER_VAL_NORM)
+ return rval;
+ return FILTER_VAL_NORM;
+
+ case TEP_FILTER_ARG_OP:
+ if (arg->op.type != TEP_FILTER_OP_NOT) {
+ lval = test_arg(tep, arg, arg->op.left, error_str);
+ switch (lval) {
+ case FILTER_VAL_NORM:
+ break;
+ case FILTER_VAL_TRUE:
+ if (arg->op.type == TEP_FILTER_OP_OR)
+ return FILTER_VAL_TRUE;
+ rval = test_arg(tep, arg, arg->op.right, error_str);
+ if (rval != FILTER_VAL_NORM)
+ return rval;
+
+ return reparent_op_arg(tep, parent, arg, arg->op.right,
+ error_str);
+
+ case FILTER_VAL_FALSE:
+ if (arg->op.type == TEP_FILTER_OP_AND)
+ return FILTER_VAL_FALSE;
+ rval = test_arg(tep, arg, arg->op.right, error_str);
+ if (rval != FILTER_VAL_NORM)
+ return rval;
+
+ return reparent_op_arg(tep, parent, arg, arg->op.right,
+ error_str);
+
+ default:
+ return lval;
+ }
+ }
+
+ rval = test_arg(tep, arg, arg->op.right, error_str);
+ switch (rval) {
+ case FILTER_VAL_NORM:
+ default:
+ break;
+
+ case FILTER_VAL_TRUE:
+ if (arg->op.type == TEP_FILTER_OP_OR)
+ return FILTER_VAL_TRUE;
+ if (arg->op.type == TEP_FILTER_OP_NOT)
+ return FILTER_VAL_FALSE;
+
+ return reparent_op_arg(tep, parent, arg, arg->op.left,
+ error_str);
+
+ case FILTER_VAL_FALSE:
+ if (arg->op.type == TEP_FILTER_OP_AND)
+ return FILTER_VAL_FALSE;
+ if (arg->op.type == TEP_FILTER_OP_NOT)
+ return FILTER_VAL_TRUE;
+
+ return reparent_op_arg(tep, parent, arg, arg->op.left,
+ error_str);
+ }
+
+ return rval;
+ default:
+ show_error(tep, error_str, "bad arg in filter tree");
+ return TEP_ERRNO__BAD_FILTER_ARG;
+ }
+ return FILTER_VAL_NORM;
+}
+
+/* Remove any unknown event fields */
+static int collapse_tree(struct tep_handle *tep, struct tep_filter_arg *arg,
+ struct tep_filter_arg **arg_collapsed, char *error_str)
+{
+ int ret;
+
+ ret = test_arg(tep, arg, arg, error_str);
+ switch (ret) {
+ case FILTER_VAL_NORM:
+ break;
+
+ case FILTER_VAL_TRUE:
+ case FILTER_VAL_FALSE:
+ free_arg(arg);
+ arg = allocate_arg();
+ if (arg) {
+ arg->type = TEP_FILTER_ARG_BOOLEAN;
+ arg->boolean.value = ret == FILTER_VAL_TRUE;
+ } else {
+ show_error(tep, error_str, "Failed to allocate filter arg");
+ ret = TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+ break;
+
+ default:
+ /* test_arg() already set the error_str */
+ free_arg(arg);
+ arg = NULL;
+ break;
+ }
+
+ *arg_collapsed = arg;
+ return ret;
+}
+
+static enum tep_errno
+process_filter(struct tep_event *event, struct tep_filter_arg **parg,
+ char *error_str, int not)
+{
+ enum tep_event_type type;
+ char *token = NULL;
+ struct tep_filter_arg *current_op = NULL;
+ struct tep_filter_arg *current_exp = NULL;
+ struct tep_filter_arg *left_item = NULL;
+ struct tep_filter_arg *arg = NULL;
+ enum op_type op_type;
+ enum tep_filter_op_type btype;
+ enum tep_filter_exp_type etype;
+ enum tep_filter_cmp_type ctype;
+ enum tep_errno ret;
+
+ *parg = NULL;
+
+ do {
+ free(token);
+ type = filter_read_token(event->tep, &token);
+ switch (type) {
+ case TEP_EVENT_SQUOTE:
+ case TEP_EVENT_DQUOTE:
+ case TEP_EVENT_ITEM:
+ ret = create_arg_item(event, token, type, &arg, error_str);
+ if (ret < 0)
+ goto fail;
+ if (!left_item)
+ left_item = arg;
+ else if (current_exp) {
+ ret = add_right(event->tep, current_exp, arg, error_str);
+ if (ret < 0)
+ goto fail;
+ left_item = NULL;
+ /* Not's only one one expression */
+ if (not) {
+ arg = NULL;
+ if (current_op)
+ goto fail_syntax;
+ free(token);
+ *parg = current_exp;
+ return 0;
+ }
+ } else
+ goto fail_syntax;
+ arg = NULL;
+ break;
+
+ case TEP_EVENT_DELIM:
+ if (*token == ',') {
+ show_error(event->tep, error_str, "Illegal token ','");
+ ret = TEP_ERRNO__ILLEGAL_TOKEN;
+ goto fail;
+ }
+
+ if (*token == '(') {
+ if (left_item) {
+ show_error(event->tep, error_str,
+ "Open paren can not come after item");
+ ret = TEP_ERRNO__INVALID_PAREN;
+ goto fail;
+ }
+ if (current_exp) {
+ show_error(event->tep, error_str,
+ "Open paren can not come after expression");
+ ret = TEP_ERRNO__INVALID_PAREN;
+ goto fail;
+ }
+
+ ret = process_filter(event, &arg, error_str, 0);
+ if (ret != TEP_ERRNO__UNBALANCED_PAREN) {
+ if (ret == 0) {
+ show_error(event->tep, error_str,
+ "Unbalanced number of '('");
+ ret = TEP_ERRNO__UNBALANCED_PAREN;
+ }
+ goto fail;
+ }
+ ret = 0;
+
+ /* A not wants just one expression */
+ if (not) {
+ if (current_op)
+ goto fail_syntax;
+ *parg = arg;
+ return 0;
+ }
+
+ if (current_op)
+ ret = add_right(event->tep, current_op, arg, error_str);
+ else
+ current_exp = arg;
+
+ if (ret < 0)
+ goto fail;
+
+ } else { /* ')' */
+ if (!current_op && !current_exp)
+ goto fail_syntax;
+
+ /* Make sure everything is finished at this level */
+ if (current_exp && !check_op_done(current_exp))
+ goto fail_syntax;
+ if (current_op && !check_op_done(current_op))
+ goto fail_syntax;
+
+ if (current_op)
+ *parg = current_op;
+ else
+ *parg = current_exp;
+ free(token);
+ return TEP_ERRNO__UNBALANCED_PAREN;
+ }
+ break;
+
+ case TEP_EVENT_OP:
+ op_type = process_op(token, &btype, &ctype, &etype);
+
+ /* All expect a left arg except for NOT */
+ switch (op_type) {
+ case OP_BOOL:
+ /* Logic ops need a left expression */
+ if (!current_exp && !current_op)
+ goto fail_syntax;
+ /* fall through */
+ case OP_NOT:
+ /* logic only processes ops and exp */
+ if (left_item)
+ goto fail_syntax;
+ break;
+ case OP_EXP:
+ case OP_CMP:
+ if (!left_item)
+ goto fail_syntax;
+ break;
+ case OP_NONE:
+ show_error(event->tep, error_str,
+ "Unknown op token %s", token);
+ ret = TEP_ERRNO__UNKNOWN_TOKEN;
+ goto fail;
+ }
+
+ ret = 0;
+ switch (op_type) {
+ case OP_BOOL:
+ arg = create_arg_op(btype);
+ if (arg == NULL)
+ goto fail_alloc;
+ if (current_op)
+ ret = add_left(arg, current_op);
+ else
+ ret = add_left(arg, current_exp);
+ current_op = arg;
+ current_exp = NULL;
+ break;
+
+ case OP_NOT:
+ arg = create_arg_op(btype);
+ if (arg == NULL)
+ goto fail_alloc;
+ if (current_op)
+ ret = add_right(event->tep, current_op, arg, error_str);
+ if (ret < 0)
+ goto fail;
+ current_exp = arg;
+ ret = process_filter(event, &arg, error_str, 1);
+ if (ret < 0)
+ goto fail;
+ ret = add_right(event->tep, current_exp, arg, error_str);
+ if (ret < 0)
+ goto fail;
+ break;
+
+ case OP_EXP:
+ case OP_CMP:
+ if (op_type == OP_EXP)
+ arg = create_arg_exp(etype);
+ else
+ arg = create_arg_cmp(ctype);
+ if (arg == NULL)
+ goto fail_alloc;
+
+ if (current_op)
+ ret = add_right(event->tep,current_op, arg, error_str);
+ if (ret < 0)
+ goto fail;
+ ret = add_left(arg, left_item);
+ if (ret < 0) {
+ arg = NULL;
+ goto fail_syntax;
+ }
+ current_exp = arg;
+ break;
+ default:
+ break;
+ }
+ arg = NULL;
+ if (ret < 0)
+ goto fail_syntax;
+ break;
+ case TEP_EVENT_NONE:
+ break;
+ case TEP_EVENT_ERROR:
+ goto fail_alloc;
+ default:
+ goto fail_syntax;
+ }
+ } while (type != TEP_EVENT_NONE);
+
+ if (!current_op && !current_exp)
+ goto fail_syntax;
+
+ if (!current_op)
+ current_op = current_exp;
+
+ ret = collapse_tree(event->tep, current_op, parg, error_str);
+ /* collapse_tree() may free current_op, and updates parg accordingly */
+ current_op = NULL;
+ if (ret < 0)
+ goto fail;
+
+ free(token);
+ return 0;
+
+ fail_alloc:
+ show_error(event->tep, error_str, "failed to allocate filter arg");
+ ret = TEP_ERRNO__MEM_ALLOC_FAILED;
+ goto fail;
+ fail_syntax:
+ show_error(event->tep, error_str, "Syntax error");
+ ret = TEP_ERRNO__SYNTAX_ERROR;
+ fail:
+ free_arg(current_op);
+ free_arg(current_exp);
+ free_arg(arg);
+ free(token);
+ return ret;
+}
+
+static enum tep_errno
+process_event(struct tep_event *event, const char *filter_str,
+ struct tep_filter_arg **parg, char *error_str)
+{
+ int ret;
+
+ init_input_buf(event->tep, filter_str, strlen(filter_str));
+
+ ret = process_filter(event, parg, error_str, 0);
+ if (ret < 0)
+ return ret;
+
+ /* If parg is NULL, then make it into FALSE */
+ if (!*parg) {
+ *parg = allocate_arg();
+ if (*parg == NULL)
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+
+ (*parg)->type = TEP_FILTER_ARG_BOOLEAN;
+ (*parg)->boolean.value = TEP_FILTER_FALSE;
+ }
+
+ return 0;
+}
+
+static enum tep_errno
+filter_event(struct tep_event_filter *filter, struct tep_event *event,
+ const char *filter_str, char *error_str)
+{
+ struct tep_filter_type *filter_type;
+ struct tep_filter_arg *arg;
+ enum tep_errno ret;
+
+ if (filter_str) {
+ ret = process_event(event, filter_str, &arg, error_str);
+ if (ret < 0)
+ return ret;
+
+ } else {
+ /* just add a TRUE arg */
+ arg = allocate_arg();
+ if (arg == NULL)
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+
+ arg->type = TEP_FILTER_ARG_BOOLEAN;
+ arg->boolean.value = TEP_FILTER_TRUE;
+ }
+
+ filter_type = add_filter_type(filter, event->id);
+ if (filter_type == NULL) {
+ free_arg(arg);
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ if (filter_type->filter)
+ free_arg(filter_type->filter);
+ filter_type->filter = arg;
+
+ return 0;
+}
+
+static void filter_init_error_buf(struct tep_event_filter *filter)
+{
+ /* clear buffer to reset show error */
+ init_input_buf(filter->tep, "", 0);
+ filter->error_buffer[0] = '\0';
+}
+
+/**
+ * tep_filter_add_filter_str - add a new filter
+ * @filter: the event filter to add to
+ * @filter_str: the filter string that contains the filter
+ *
+ * Returns 0 if the filter was successfully added or a
+ * negative error code. Use tep_filter_strerror() to see
+ * actual error message in case of error.
+ */
+enum tep_errno tep_filter_add_filter_str(struct tep_event_filter *filter,
+ const char *filter_str)
+{
+ struct tep_handle *tep = filter->tep;
+ struct event_list *event;
+ struct event_list *events = NULL;
+ const char *filter_start;
+ const char *next_event;
+ char *this_event;
+ char *event_name = NULL;
+ char *sys_name = NULL;
+ char *sp;
+ enum tep_errno rtn = 0; /* TEP_ERRNO__SUCCESS */
+ int len;
+ int ret;
+
+ filter_init_error_buf(filter);
+
+ filter_start = strchr(filter_str, ':');
+ if (filter_start)
+ len = filter_start - filter_str;
+ else
+ len = strlen(filter_str);
+
+ do {
+ next_event = strchr(filter_str, ',');
+ if (next_event &&
+ (!filter_start || next_event < filter_start))
+ len = next_event - filter_str;
+ else if (filter_start)
+ len = filter_start - filter_str;
+ else
+ len = strlen(filter_str);
+
+ this_event = malloc(len + 1);
+ if (this_event == NULL) {
+ /* This can only happen when events is NULL, but still */
+ free_events(events);
+ return TEP_ERRNO__MEM_ALLOC_FAILED;
+ }
+ memcpy(this_event, filter_str, len);
+ this_event[len] = 0;
+
+ if (next_event)
+ next_event++;
+
+ filter_str = next_event;
+
+ sys_name = strtok_r(this_event, "/", &sp);
+ event_name = strtok_r(NULL, "/", &sp);
+
+ if (!sys_name) {
+ /* This can only happen when events is NULL, but still */
+ free_events(events);
+ free(this_event);
+ return TEP_ERRNO__FILTER_NOT_FOUND;
+ }
+
+ /* Find this event */
+ ret = find_event(tep, &events, strim(sys_name), strim(event_name));
+ if (ret < 0) {
+ free_events(events);
+ free(this_event);
+ return ret;
+ }
+ free(this_event);
+ } while (filter_str);
+
+ /* Skip the ':' */
+ if (filter_start)
+ filter_start++;
+
+ /* filter starts here */
+ for (event = events; event; event = event->next) {
+ ret = filter_event(filter, event->event, filter_start,
+ filter->error_buffer);
+ /* Failures are returned if a parse error happened */
+ if (ret < 0)
+ rtn = ret;
+
+ if (ret >= 0 && tep->test_filters) {
+ char *test;
+ test = tep_filter_make_string(filter, event->event->id);
+ if (test) {
+ printf(" '%s: %s'\n", event->event->name, test);
+ free(test);
+ }
+ }
+ }
+
+ free_events(events);
+
+ return rtn;
+}
+
+static void free_filter_type(struct tep_filter_type *filter_type)
+{
+ free_arg(filter_type->filter);
+}
+
+/**
+ * tep_filter_strerror - fill error message in a buffer
+ * @filter: the event filter contains error
+ * @err: the error code
+ * @buf: the buffer to be filled in
+ * @buflen: the size of the buffer
+ *
+ * Returns 0 if message was filled successfully, -1 if error
+ */
+int tep_filter_strerror(struct tep_event_filter *filter, enum tep_errno err,
+ char *buf, size_t buflen)
+{
+ if (err <= __TEP_ERRNO__START || err >= __TEP_ERRNO__END)
+ return -1;
+
+ if (strlen(filter->error_buffer) > 0) {
+ size_t len = snprintf(buf, buflen, "%s", filter->error_buffer);
+
+ if (len > buflen)
+ return -1;
+ return 0;
+ }
+
+ return tep_strerror(filter->tep, err, buf, buflen);
+}
+
+/**
+ * tep_filter_remove_event - remove a filter for an event
+ * @filter: the event filter to remove from
+ * @event_id: the event to remove a filter for
+ *
+ * Removes the filter saved for an event defined by @event_id
+ * from the @filter.
+ *
+ * Returns 1: if an event was removed
+ * 0: if the event was not found
+ */
+int tep_filter_remove_event(struct tep_event_filter *filter,
+ int event_id)
+{
+ struct tep_filter_type *filter_type;
+ unsigned long len;
+
+ if (!filter->filters)
+ return 0;
+
+ filter_type = find_filter_type(filter, event_id);
+
+ if (!filter_type)
+ return 0;
+
+ free_filter_type(filter_type);
+
+ /* The filter_type points into the event_filters array */
+ len = (unsigned long)(filter->event_filters + filter->filters) -
+ (unsigned long)(filter_type + 1);
+
+ memmove(filter_type, filter_type + 1, len);
+ filter->filters--;
+
+ memset(&filter->event_filters[filter->filters], 0,
+ sizeof(*filter_type));
+
+ return 1;
+}
+
+/**
+ * tep_filter_reset - clear all filters in a filter
+ * @filter: the event filter to reset
+ *
+ * Removes all filters from a filter and resets it.
+ */
+void tep_filter_reset(struct tep_event_filter *filter)
+{
+ int i;
+
+ for (i = 0; i < filter->filters; i++)
+ free_filter_type(&filter->event_filters[i]);
+
+ free(filter->event_filters);
+ filter->filters = 0;
+ filter->event_filters = NULL;
+}
+
+void tep_filter_free(struct tep_event_filter *filter)
+{
+ tep_unref(filter->tep);
+
+ tep_filter_reset(filter);
+
+ free(filter);
+}
+
+static char *arg_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg);
+
+static int copy_filter_type(struct tep_event_filter *filter,
+ struct tep_event_filter *source,
+ struct tep_filter_type *filter_type)
+{
+ struct tep_filter_arg *arg;
+ struct tep_event *event;
+ const char *sys;
+ const char *name;
+ char *str;
+
+ /* Can't assume that the tep's are the same */
+ sys = filter_type->event->system;
+ name = filter_type->event->name;
+ event = tep_find_event_by_name(filter->tep, sys, name);
+ if (!event)
+ return -1;
+
+ str = arg_to_str(source, filter_type->filter);
+ if (!str)
+ return -1;
+
+ if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) {
+ /* Add trivial event */
+ arg = allocate_arg();
+ if (arg == NULL) {
+ free(str);
+ return -1;
+ }
+
+ arg->type = TEP_FILTER_ARG_BOOLEAN;
+ if (strcmp(str, "TRUE") == 0)
+ arg->boolean.value = 1;
+ else
+ arg->boolean.value = 0;
+
+ filter_type = add_filter_type(filter, event->id);
+ if (filter_type == NULL) {
+ free(str);
+ free_arg(arg);
+ return -1;
+ }
+
+ filter_type->filter = arg;
+
+ free(str);
+ return 0;
+ }
+
+ filter_event(filter, event, str, NULL);
+ free(str);
+
+ return 0;
+}
+
+/**
+ * tep_filter_copy - copy a filter using another filter
+ * @dest - the filter to copy to
+ * @source - the filter to copy from
+ *
+ * Returns 0 on success and -1 if not all filters were copied
+ */
+int tep_filter_copy(struct tep_event_filter *dest, struct tep_event_filter *source)
+{
+ int ret = 0;
+ int i;
+
+ tep_filter_reset(dest);
+
+ for (i = 0; i < source->filters; i++) {
+ if (copy_filter_type(dest, source, &source->event_filters[i]))
+ ret = -1;
+ }
+ return ret;
+}
+
+static int test_filter(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err);
+
+static const char *
+get_comm(struct tep_event *event, struct tep_record *record)
+{
+ const char *comm;
+ int pid;
+
+ pid = tep_data_pid(event->tep, record);
+ comm = tep_data_comm_from_pid(event->tep, pid);
+ return comm;
+}
+
+static unsigned long long
+get_value(struct tep_event *event,
+ struct tep_format_field *field, struct tep_record *record)
+{
+ unsigned long long val;
+
+ /* Handle our dummy "comm" field */
+ if (field == &comm) {
+ const char *name;
+
+ name = get_comm(event, record);
+ return (unsigned long)name;
+ }
+
+ /* Handle our dummy "cpu" field */
+ if (field == &cpu)
+ return record->cpu;
+
+ tep_read_number_field(field, record->data, &val);
+
+ if (!(field->flags & TEP_FIELD_IS_SIGNED))
+ return val;
+
+ switch (field->size) {
+ case 1:
+ return (char)val;
+ case 2:
+ return (short)val;
+ case 4:
+ return (int)val;
+ case 8:
+ return (long long)val;
+ }
+ return val;
+}
+
+static unsigned long long
+get_arg_value(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err);
+
+static unsigned long long
+get_exp_value(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err)
+{
+ unsigned long long lval, rval;
+
+ lval = get_arg_value(event, arg->exp.left, record, err);
+ rval = get_arg_value(event, arg->exp.right, record, err);
+
+ if (*err) {
+ /*
+ * There was an error, no need to process anymore.
+ */
+ return 0;
+ }
+
+ switch (arg->exp.type) {
+ case TEP_FILTER_EXP_ADD:
+ return lval + rval;
+
+ case TEP_FILTER_EXP_SUB:
+ return lval - rval;
+
+ case TEP_FILTER_EXP_MUL:
+ return lval * rval;
+
+ case TEP_FILTER_EXP_DIV:
+ return lval / rval;
+
+ case TEP_FILTER_EXP_MOD:
+ return lval % rval;
+
+ case TEP_FILTER_EXP_RSHIFT:
+ return lval >> rval;
+
+ case TEP_FILTER_EXP_LSHIFT:
+ return lval << rval;
+
+ case TEP_FILTER_EXP_AND:
+ return lval & rval;
+
+ case TEP_FILTER_EXP_OR:
+ return lval | rval;
+
+ case TEP_FILTER_EXP_XOR:
+ return lval ^ rval;
+
+ case TEP_FILTER_EXP_NOT:
+ default:
+ if (!*err)
+ *err = TEP_ERRNO__INVALID_EXP_TYPE;
+ }
+ return 0;
+}
+
+static unsigned long long
+get_arg_value(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err)
+{
+ switch (arg->type) {
+ case TEP_FILTER_ARG_FIELD:
+ return get_value(event, arg->field.field, record);
+
+ case TEP_FILTER_ARG_VALUE:
+ if (arg->value.type != TEP_FILTER_NUMBER) {
+ if (!*err)
+ *err = TEP_ERRNO__NOT_A_NUMBER;
+ }
+ return arg->value.val;
+
+ case TEP_FILTER_ARG_EXP:
+ return get_exp_value(event, arg, record, err);
+
+ default:
+ if (!*err)
+ *err = TEP_ERRNO__INVALID_ARG_TYPE;
+ }
+ return 0;
+}
+
+static int test_num(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err)
+{
+ unsigned long long lval, rval;
+
+ lval = get_arg_value(event, arg->num.left, record, err);
+ rval = get_arg_value(event, arg->num.right, record, err);
+
+ if (*err) {
+ /*
+ * There was an error, no need to process anymore.
+ */
+ return 0;
+ }
+
+ switch (arg->num.type) {
+ case TEP_FILTER_CMP_EQ:
+ return lval == rval;
+
+ case TEP_FILTER_CMP_NE:
+ return lval != rval;
+
+ case TEP_FILTER_CMP_GT:
+ return lval > rval;
+
+ case TEP_FILTER_CMP_LT:
+ return lval < rval;
+
+ case TEP_FILTER_CMP_GE:
+ return lval >= rval;
+
+ case TEP_FILTER_CMP_LE:
+ return lval <= rval;
+
+ default:
+ if (!*err)
+ *err = TEP_ERRNO__ILLEGAL_INTEGER_CMP;
+ return 0;
+ }
+}
+
+static const char *get_field_str(struct tep_filter_arg *arg, struct tep_record *record)
+{
+ struct tep_event *event;
+ struct tep_handle *tep;
+ unsigned long long addr;
+ const char *val = NULL;
+ unsigned int size;
+ char hex[64];
+
+ /* If the field is not a string convert it */
+ if (arg->str.field->flags & TEP_FIELD_IS_STRING) {
+ val = record->data + arg->str.field->offset;
+ size = arg->str.field->size;
+
+ if (arg->str.field->flags & TEP_FIELD_IS_DYNAMIC) {
+ addr = *(unsigned int *)val;
+ size = addr >> 16;
+ addr &= 0xffff;
+ if (arg->str.field->flags & TEP_FIELD_IS_RELATIVE)
+ addr += arg->str.field->offset + arg->str.field->size;
+ val = record->data + addr;
+ }
+
+ /*
+ * We need to copy the data since we can't be sure the field
+ * is null terminated.
+ */
+ if (*(val + size - 1)) {
+ /* copy it */
+ memcpy(arg->str.buffer, val, arg->str.field->size);
+ /* the buffer is already NULL terminated */
+ val = arg->str.buffer;
+ }
+
+ } else {
+ event = arg->str.field->event;
+ tep = event->tep;
+ addr = get_value(event, arg->str.field, record);
+
+ if (arg->str.field->flags & (TEP_FIELD_IS_POINTER | TEP_FIELD_IS_LONG))
+ /* convert to a kernel symbol */
+ val = tep_find_function(tep, addr);
+
+ if (val == NULL) {
+ /* just use the hex of the string name */
+ snprintf(hex, 64, "0x%llx", addr);
+ val = hex;
+ }
+ }
+
+ return val;
+}
+
+static int test_str(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err)
+{
+ const char *val;
+
+ if (arg->str.field == &comm)
+ val = get_comm(event, record);
+ else
+ val = get_field_str(arg, record);
+
+ switch (arg->str.type) {
+ case TEP_FILTER_CMP_MATCH:
+ return strcmp(val, arg->str.val) == 0;
+
+ case TEP_FILTER_CMP_NOT_MATCH:
+ return strcmp(val, arg->str.val) != 0;
+
+ case TEP_FILTER_CMP_REGEX:
+ /* Returns zero on match */
+ return !regexec(&arg->str.reg, val, 0, NULL, 0);
+
+ case TEP_FILTER_CMP_NOT_REGEX:
+ return regexec(&arg->str.reg, val, 0, NULL, 0);
+
+ default:
+ if (!*err)
+ *err = TEP_ERRNO__ILLEGAL_STRING_CMP;
+ return 0;
+ }
+}
+
+static int test_op(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err)
+{
+ switch (arg->op.type) {
+ case TEP_FILTER_OP_AND:
+ return test_filter(event, arg->op.left, record, err) &&
+ test_filter(event, arg->op.right, record, err);
+
+ case TEP_FILTER_OP_OR:
+ return test_filter(event, arg->op.left, record, err) ||
+ test_filter(event, arg->op.right, record, err);
+
+ case TEP_FILTER_OP_NOT:
+ return !test_filter(event, arg->op.right, record, err);
+
+ default:
+ if (!*err)
+ *err = TEP_ERRNO__INVALID_OP_TYPE;
+ return 0;
+ }
+}
+
+static int test_filter(struct tep_event *event, struct tep_filter_arg *arg,
+ struct tep_record *record, enum tep_errno *err)
+{
+ if (*err) {
+ /*
+ * There was an error, no need to process anymore.
+ */
+ return 0;
+ }
+
+ switch (arg->type) {
+ case TEP_FILTER_ARG_BOOLEAN:
+ /* easy case */
+ return arg->boolean.value;
+
+ case TEP_FILTER_ARG_OP:
+ return test_op(event, arg, record, err);
+
+ case TEP_FILTER_ARG_NUM:
+ return test_num(event, arg, record, err);
+
+ case TEP_FILTER_ARG_STR:
+ return test_str(event, arg, record, err);
+
+ case TEP_FILTER_ARG_EXP:
+ case TEP_FILTER_ARG_VALUE:
+ case TEP_FILTER_ARG_FIELD:
+ /*
+ * Expressions, fields and values evaluate
+ * to true if they return non zero
+ */
+ return !!get_arg_value(event, arg, record, err);
+
+ default:
+ if (!*err)
+ *err = TEP_ERRNO__INVALID_ARG_TYPE;
+ return 0;
+ }
+}
+
+/**
+ * tep_event_filtered - return true if event has filter
+ * @filter: filter struct with filter information
+ * @event_id: event id to test if filter exists
+ *
+ * Returns 1 if filter found for @event_id
+ * otherwise 0;
+ */
+int tep_event_filtered(struct tep_event_filter *filter, int event_id)
+{
+ struct tep_filter_type *filter_type;
+
+ if (!filter->filters)
+ return 0;
+
+ filter_type = find_filter_type(filter, event_id);
+
+ return filter_type ? 1 : 0;
+}
+
+/**
+ * tep_filter_match - test if a record matches a filter
+ * @filter: filter struct with filter information
+ * @record: the record to test against the filter
+ *
+ * Returns: match result or error code (prefixed with TEP_ERRNO__)
+ * FILTER_MATCH - filter found for event and @record matches
+ * FILTER_MISS - filter found for event and @record does not match
+ * FILTER_NOT_FOUND - no filter found for @record's event
+ * NO_FILTER - if no filters exist
+ * otherwise - error occurred during test
+ */
+enum tep_errno tep_filter_match(struct tep_event_filter *filter,
+ struct tep_record *record)
+{
+ struct tep_handle *tep = filter->tep;
+ struct tep_filter_type *filter_type;
+ int event_id;
+ int ret;
+ enum tep_errno err = 0;
+
+ filter_init_error_buf(filter);
+
+ if (!filter->filters)
+ return TEP_ERRNO__NO_FILTER;
+
+ event_id = tep_data_type(tep, record);
+
+ filter_type = find_filter_type(filter, event_id);
+ if (!filter_type)
+ return TEP_ERRNO__FILTER_NOT_FOUND;
+
+ ret = test_filter(filter_type->event, filter_type->filter, record, &err);
+ if (err)
+ return err;
+
+ return ret ? TEP_ERRNO__FILTER_MATCH : TEP_ERRNO__FILTER_MISS;
+}
+
+static char *op_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ char *str = NULL;
+ char *left = NULL;
+ char *right = NULL;
+ char *op = NULL;
+ int left_val = -1;
+ int right_val = -1;
+ int val;
+
+ switch (arg->op.type) {
+ case TEP_FILTER_OP_AND:
+ op = "&&";
+ /* fall through */
+ case TEP_FILTER_OP_OR:
+ if (!op)
+ op = "||";
+
+ left = arg_to_str(filter, arg->op.left);
+ right = arg_to_str(filter, arg->op.right);
+ if (!left || !right)
+ break;
+
+ /* Try to consolidate boolean values */
+ if (strcmp(left, "TRUE") == 0)
+ left_val = 1;
+ else if (strcmp(left, "FALSE") == 0)
+ left_val = 0;
+
+ if (strcmp(right, "TRUE") == 0)
+ right_val = 1;
+ else if (strcmp(right, "FALSE") == 0)
+ right_val = 0;
+
+ if (left_val >= 0) {
+ if ((arg->op.type == TEP_FILTER_OP_AND && !left_val) ||
+ (arg->op.type == TEP_FILTER_OP_OR && left_val)) {
+ /* Just return left value */
+ str = left;
+ left = NULL;
+ break;
+ }
+ if (right_val >= 0) {
+ /* just evaluate this. */
+ val = 0;
+ switch (arg->op.type) {
+ case TEP_FILTER_OP_AND:
+ val = left_val && right_val;
+ break;
+ case TEP_FILTER_OP_OR:
+ val = left_val || right_val;
+ break;
+ default:
+ break;
+ }
+ if (asprintf(&str, val ? "TRUE" : "FALSE") < 0)
+ str = NULL;
+ break;
+ }
+ }
+ if (right_val >= 0) {
+ if ((arg->op.type == TEP_FILTER_OP_AND && !right_val) ||
+ (arg->op.type == TEP_FILTER_OP_OR && right_val)) {
+ /* Just return right value */
+ str = right;
+ right = NULL;
+ break;
+ }
+ /* The right value is meaningless */
+ str = left;
+ left = NULL;
+ break;
+ }
+
+ if (asprintf(&str, "(%s) %s (%s)", left, op, right) < 0)
+ str = NULL;
+ break;
+
+ case TEP_FILTER_OP_NOT:
+ op = "!";
+ right = arg_to_str(filter, arg->op.right);
+ if (!right)
+ break;
+
+ /* See if we can consolidate */
+ if (strcmp(right, "TRUE") == 0)
+ right_val = 1;
+ else if (strcmp(right, "FALSE") == 0)
+ right_val = 0;
+ if (right_val >= 0) {
+ /* just return the opposite */
+ if (asprintf(&str, right_val ? "FALSE" : "TRUE") < 0)
+ str = NULL;
+ break;
+ }
+ if (asprintf(&str, "%s(%s)", op, right) < 0)
+ str = NULL;
+ break;
+
+ default:
+ /* ?? */
+ break;
+ }
+ free(left);
+ free(right);
+ return str;
+}
+
+static char *val_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ char *str = NULL;
+
+ if (asprintf(&str, "%lld", arg->value.val) < 0)
+ str = NULL;
+
+ return str;
+}
+
+static char *field_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ return strdup(arg->field.field->name);
+}
+
+static char *exp_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ char *lstr;
+ char *rstr;
+ char *op;
+ char *str = NULL;
+
+ lstr = arg_to_str(filter, arg->exp.left);
+ rstr = arg_to_str(filter, arg->exp.right);
+ if (!lstr || !rstr)
+ goto out;
+
+ switch (arg->exp.type) {
+ case TEP_FILTER_EXP_ADD:
+ op = "+";
+ break;
+ case TEP_FILTER_EXP_SUB:
+ op = "-";
+ break;
+ case TEP_FILTER_EXP_MUL:
+ op = "*";
+ break;
+ case TEP_FILTER_EXP_DIV:
+ op = "/";
+ break;
+ case TEP_FILTER_EXP_MOD:
+ op = "%";
+ break;
+ case TEP_FILTER_EXP_RSHIFT:
+ op = ">>";
+ break;
+ case TEP_FILTER_EXP_LSHIFT:
+ op = "<<";
+ break;
+ case TEP_FILTER_EXP_AND:
+ op = "&";
+ break;
+ case TEP_FILTER_EXP_OR:
+ op = "|";
+ break;
+ case TEP_FILTER_EXP_XOR:
+ op = "^";
+ break;
+ default:
+ op = "[ERROR IN EXPRESSION TYPE]";
+ break;
+ }
+
+ if (asprintf(&str, "%s %s %s", lstr, op, rstr) < 0)
+ str = NULL;
+out:
+ free(lstr);
+ free(rstr);
+
+ return str;
+}
+
+static char *num_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ char *lstr;
+ char *rstr;
+ char *str = NULL;
+ char *op = NULL;
+
+ lstr = arg_to_str(filter, arg->num.left);
+ rstr = arg_to_str(filter, arg->num.right);
+ if (!lstr || !rstr)
+ goto out;
+
+ switch (arg->num.type) {
+ case TEP_FILTER_CMP_EQ:
+ op = "==";
+ /* fall through */
+ case TEP_FILTER_CMP_NE:
+ if (!op)
+ op = "!=";
+ /* fall through */
+ case TEP_FILTER_CMP_GT:
+ if (!op)
+ op = ">";
+ /* fall through */
+ case TEP_FILTER_CMP_LT:
+ if (!op)
+ op = "<";
+ /* fall through */
+ case TEP_FILTER_CMP_GE:
+ if (!op)
+ op = ">=";
+ /* fall through */
+ case TEP_FILTER_CMP_LE:
+ if (!op)
+ op = "<=";
+
+ if (asprintf(&str, "%s %s %s", lstr, op, rstr) < 0)
+ str = NULL;
+ break;
+
+ default:
+ /* ?? */
+ break;
+ }
+
+out:
+ free(lstr);
+ free(rstr);
+ return str;
+}
+
+static char *str_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ char *str = NULL;
+ char *op = NULL;
+
+ switch (arg->str.type) {
+ case TEP_FILTER_CMP_MATCH:
+ op = "==";
+ /* fall through */
+ case TEP_FILTER_CMP_NOT_MATCH:
+ if (!op)
+ op = "!=";
+ /* fall through */
+ case TEP_FILTER_CMP_REGEX:
+ if (!op)
+ op = "=~";
+ /* fall through */
+ case TEP_FILTER_CMP_NOT_REGEX:
+ if (!op)
+ op = "!~";
+
+ if (asprintf(&str, "%s %s \"%s\"",
+ arg->str.field->name, op, arg->str.val) < 0)
+ str = NULL;
+ break;
+
+ default:
+ /* ?? */
+ break;
+ }
+ return str;
+}
+
+static char *arg_to_str(struct tep_event_filter *filter, struct tep_filter_arg *arg)
+{
+ char *str = NULL;
+
+ switch (arg->type) {
+ case TEP_FILTER_ARG_BOOLEAN:
+ if (asprintf(&str, arg->boolean.value ? "TRUE" : "FALSE") < 0)
+ str = NULL;
+ return str;
+
+ case TEP_FILTER_ARG_OP:
+ return op_to_str(filter, arg);
+
+ case TEP_FILTER_ARG_NUM:
+ return num_to_str(filter, arg);
+
+ case TEP_FILTER_ARG_STR:
+ return str_to_str(filter, arg);
+
+ case TEP_FILTER_ARG_VALUE:
+ return val_to_str(filter, arg);
+
+ case TEP_FILTER_ARG_FIELD:
+ return field_to_str(filter, arg);
+
+ case TEP_FILTER_ARG_EXP:
+ return exp_to_str(filter, arg);
+
+ default:
+ /* ?? */
+ return NULL;
+ }
+
+}
+
+/**
+ * tep_filter_make_string - return a string showing the filter
+ * @filter: filter struct with filter information
+ * @event_id: the event id to return the filter string with
+ *
+ * Returns a string that displays the filter contents.
+ * This string must be freed with free(str).
+ * NULL is returned if no filter is found or allocation failed.
+ */
+char *
+tep_filter_make_string(struct tep_event_filter *filter, int event_id)
+{
+ struct tep_filter_type *filter_type;
+
+ if (!filter->filters)
+ return NULL;
+
+ filter_type = find_filter_type(filter, event_id);
+
+ if (!filter_type)
+ return NULL;
+
+ return arg_to_str(filter, filter_type->filter);
+}
+
+/**
+ * tep_filter_compare - compare two filters and return if they are the same
+ * @filter1: Filter to compare with @filter2
+ * @filter2: Filter to compare with @filter1
+ *
+ * Returns:
+ * 1 if the two filters hold the same content.
+ * 0 if they do not.
+ */
+int tep_filter_compare(struct tep_event_filter *filter1, struct tep_event_filter *filter2)
+{
+ struct tep_filter_type *filter_type1;
+ struct tep_filter_type *filter_type2;
+ char *str1, *str2;
+ int result;
+ int i;
+
+ /* Do the easy checks first */
+ if (filter1->filters != filter2->filters)
+ return 0;
+ if (!filter1->filters && !filter2->filters)
+ return 1;
+
+ /*
+ * Now take a look at each of the events to see if they have the same
+ * filters to them.
+ */
+ for (i = 0; i < filter1->filters; i++) {
+ filter_type1 = &filter1->event_filters[i];
+ filter_type2 = find_filter_type(filter2, filter_type1->event_id);
+ if (!filter_type2)
+ break;
+ if (filter_type1->filter->type != filter_type2->filter->type)
+ break;
+ /* The best way to compare complex filters is with strings */
+ str1 = arg_to_str(filter1, filter_type1->filter);
+ str2 = arg_to_str(filter2, filter_type2->filter);
+ if (str1 && str2)
+ result = strcmp(str1, str2) != 0;
+ else
+ /* bail out if allocation fails */
+ result = 1;
+
+ free(str1);
+ free(str2);
+ if (result)
+ break;
+ }
+
+ if (i < filter1->filters)
+ return 0;
+ return 1;
+}
+
diff --git a/src/parse-utils.c b/src/parse-utils.c
new file mode 100644
index 0000000..9c38e1e
--- /dev/null
+++ b/src/parse-utils.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include "event-utils.h"
+#include "event-parse.h"
+#include "kbuffer.h"
+
+#define __weak __attribute__((weak))
+
+static int log_level = TEP_LOG_CRITICAL;
+
+/**
+ * tep_set_loglevel - set log level of the library
+ * @level: desired level of the library messages
+ */
+void tep_set_loglevel(enum tep_loglevel level)
+{
+ log_level = level;
+}
+
+/**
+ * tep_vprint - print library log messages
+ * @name: name of the library.
+ * @level: severity of the log message. This parameter is not used in this implementation, but as
+ * the function is weak and can be overridden, having the log level could be useful
+ * for other implementations.
+ * @print_err: whether to print the errno, if non zero.
+ * @fmt: printf format string of the message.
+ * @ap: list of printf parameters.
+ *
+ * This function is used to print all messages from traceevent, tracefs and trace-cmd libraries.
+ * It is defined as weak, so the application that uses those libraries can override it in order
+ * to implement its own logic for printing library logs.
+ *
+ * Return the value of errno at the function enter.
+ */
+int __weak tep_vprint(const char *name, enum tep_loglevel level,
+ bool print_err, const char *fmt, va_list ap)
+{
+ return __tep_vprint(name, level, print_err, fmt, ap);
+}
+
+/**
+ * __tep_vprint - print library log messages
+ * @name: name of the library.
+ * @level: severity of the log message. This parameter is not used in this implementation, but as
+ * the function is weak and can be overridden, having the log level could be useful
+ * for other implementations.
+ * @print_err: whether to print the errno, if non zero.
+ * @fmt: printf format string of the message.
+ * @ap: list of printf parameters.
+ *
+ * This function is used to print all messages from traceevent, tracefs and trace-cmd libraries.
+ * It is defined as weak, so the application that uses those libraries can override it in order
+ * to implement its own logic for printing library logs.
+ *
+ * Return the value of errno at the function enter.
+ */
+int __tep_vprint(const char *name, enum tep_loglevel level,
+ bool print_err, const char *fmt, va_list ap)
+{
+ int ret = errno;
+ FILE *fp = stdout;
+
+ if (level <= TEP_LOG_WARNING) {
+ fp = stderr;
+ if (errno && print_err) {
+ perror(name);
+ fprintf(stderr, " ");
+ }
+ }
+ vfprintf(fp, fmt, ap);
+ fprintf(fp, "\n");
+
+ return ret;
+}
+
+void tep_warning(const char *fmt, ...)
+{
+ va_list ap;
+
+ if (log_level < TEP_LOG_WARNING)
+ return;
+
+ va_start(ap, fmt);
+ tep_vprint("libtraceevent", TEP_LOG_WARNING, true, fmt, ap);
+ va_end(ap);
+}
+
+
+void tep_info(const char *fmt, ...)
+{
+ va_list ap;
+
+ if (log_level < TEP_LOG_INFO)
+ return;
+
+ va_start(ap, fmt);
+ tep_vprint("libtraceevent", TEP_LOG_INFO, false, fmt, ap);
+ va_end(ap);
+}
+
+/* The below is for backward compatibility */
+int __weak tep_vwarning(const char *name, const char *fmt, va_list ap)
+{
+ return tep_vprint(name, TEP_LOG_WARNING, true, fmt, ap);
+}
+
+void pr_stat(const char *fmt, ...) __attribute__((weak, alias("tep_info")));
+void __pr_stat(const char *fmt, ...) __attribute__((weak, alias("tep_info")));
+
+void __weak __vpr_stat(const char *fmt, va_list ap)
+{
+ tep_vprint("libtraceevent", TEP_LOG_INFO, false, fmt, ap);
+}
+
+void vpr_stat(const char *fmt, va_list ap) __attribute__((weak, alias("__vpr_stat")));
+
+/**
+ * tep_kbuffer - return an allocated kbuffer that can be used for the tep handle
+ * @tep: the handle that will work with the kbuffer descriptor
+ *
+ * Allocates and returns a new kbuffer.
+ * The return must be freed by kbuffer_free();
+ */
+struct kbuffer *tep_kbuffer(struct tep_handle *tep)
+{
+ enum kbuffer_endian endian;
+ int long_size;
+
+ long_size = tep_get_long_size(tep);
+ if (long_size == 8)
+ long_size = KBUFFER_LSIZE_8;
+ else
+ long_size = KBUFFER_LSIZE_4;
+
+ if (tep_is_file_bigendian(tep))
+ endian = KBUFFER_ENDIAN_BIG;
+ else
+ endian = KBUFFER_ENDIAN_LITTLE;
+
+ return kbuffer_alloc(long_size, endian);
+}
diff --git a/src/tep_strerror.c b/src/tep_strerror.c
new file mode 100644
index 0000000..4ac2644
--- /dev/null
+++ b/src/tep_strerror.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: LGPL-2.1
+#undef _GNU_SOURCE
+#include <string.h>
+#include <stdio.h>
+
+#include "event-parse.h"
+
+#undef _PE
+#define _PE(code, str) str
+static const char * const tep_error_str[] = {
+ TEP_ERRORS
+};
+#undef _PE
+
+/*
+ * The tools so far have been using the strerror_r() GNU variant, that returns
+ * a string, be it the buffer passed or something else.
+ *
+ * But that, besides being tricky in cases where we expect that the function
+ * using strerror_r() returns the error formatted in a provided buffer (we have
+ * to check if it returned something else and copy that instead), breaks the
+ * build on systems not using glibc, like Alpine Linux, where musl libc is
+ * used.
+ *
+ * So, introduce yet another wrapper, str_error_r(), that has the GNU
+ * interface, but uses the portable XSI variant of strerror_r(), so that users
+ * rest asured that the provided buffer is used and it is what is returned.
+ */
+int tep_strerror(struct tep_handle *tep __maybe_unused,
+ enum tep_errno errnum, char *buf, size_t buflen)
+{
+ const char *msg;
+ int idx;
+
+ if (!buflen)
+ return 0;
+
+ if (errnum >= 0) {
+ int err = strerror_r(errnum, buf, buflen);
+ buf[buflen - 1] = 0;
+ return err;
+ }
+
+ if (errnum <= __TEP_ERRNO__START ||
+ errnum >= __TEP_ERRNO__END)
+ return -1;
+
+ idx = errnum - __TEP_ERRNO__START - 1;
+ msg = tep_error_str[idx];
+ snprintf(buf, buflen, "%s", msg);
+
+ return 0;
+}
diff --git a/src/trace-seq.c b/src/trace-seq.c
new file mode 100644
index 0000000..8d5ecd2
--- /dev/null
+++ b/src/trace-seq.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ */
+#include "trace-seq.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include <asm/bug.h>
+#include "event-parse.h"
+#include "event-utils.h"
+
+/*
+ * The TRACE_SEQ_POISON is to catch the use of using
+ * a trace_seq structure after it was destroyed.
+ */
+#define TRACE_SEQ_POISON ((void *)0xdeadbeef)
+#define TRACE_SEQ_CHECK(s) \
+do { \
+ if (WARN_ONCE((s)->buffer == TRACE_SEQ_POISON, \
+ "Usage of trace_seq after it was destroyed")) \
+ (s)->state = TRACE_SEQ__BUFFER_POISONED; \
+} while (0)
+
+#define TRACE_SEQ_CHECK_RET_N(s, n) \
+do { \
+ TRACE_SEQ_CHECK(s); \
+ if ((s)->state != TRACE_SEQ__GOOD) \
+ return n; \
+} while (0)
+
+#define TRACE_SEQ_CHECK_RET(s) TRACE_SEQ_CHECK_RET_N(s, )
+#define TRACE_SEQ_CHECK_RET0(s) TRACE_SEQ_CHECK_RET_N(s, 0)
+
+/**
+ * trace_seq_init - initialize the trace_seq structure
+ * @s: a pointer to the trace_seq structure to initialize
+ */
+void trace_seq_init(struct trace_seq *s)
+{
+ s->len = 0;
+ s->readpos = 0;
+ s->buffer_size = TRACE_SEQ_BUF_SIZE;
+ s->buffer = malloc(s->buffer_size);
+ if (s->buffer != NULL)
+ s->state = TRACE_SEQ__GOOD;
+ else
+ s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
+}
+
+/**
+ * trace_seq_reset - re-initialize the trace_seq structure
+ * @s: a pointer to the trace_seq structure to reset
+ */
+void trace_seq_reset(struct trace_seq *s)
+{
+ if (!s)
+ return;
+ TRACE_SEQ_CHECK(s);
+ s->len = 0;
+ s->readpos = 0;
+}
+
+/**
+ * trace_seq_destroy - free up memory of a trace_seq
+ * @s: a pointer to the trace_seq to free the buffer
+ *
+ * Only frees the buffer, not the trace_seq struct itself.
+ */
+void trace_seq_destroy(struct trace_seq *s)
+{
+ if (!s)
+ return;
+ TRACE_SEQ_CHECK_RET(s);
+ free(s->buffer);
+ s->buffer = TRACE_SEQ_POISON;
+}
+
+static void expand_buffer(struct trace_seq *s)
+{
+ char *buf;
+
+ buf = realloc(s->buffer, s->buffer_size + TRACE_SEQ_BUF_SIZE);
+ if (WARN_ONCE(!buf, "Can't allocate trace_seq buffer memory")) {
+ s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
+ return;
+ }
+
+ s->buffer = buf;
+ s->buffer_size += TRACE_SEQ_BUF_SIZE;
+}
+
+/**
+ * trace_seq_printf - sequence printing of trace information
+ * @s: trace sequence descriptor
+ * @fmt: printf format string
+ *
+ * It returns 0 if the trace oversizes the buffer's free
+ * space, the number of characters printed, or a negative
+ * value in case of an error.
+ *
+ * The tracer may use either sequence operations or its own
+ * copy to user routines. To simplify formating of a trace
+ * trace_seq_printf is used to store strings into a special
+ * buffer (@s). Then the output may be either used by
+ * the sequencer or pulled into another buffer.
+ */
+int
+trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+{
+ va_list ap;
+ int len;
+ int ret;
+
+ try_again:
+ TRACE_SEQ_CHECK_RET0(s);
+
+ len = (s->buffer_size - 1) - s->len;
+
+ va_start(ap, fmt);
+ ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
+ va_end(ap);
+
+ if (ret >= len) {
+ expand_buffer(s);
+ goto try_again;
+ }
+
+ if (ret > 0)
+ s->len += ret;
+
+ return ret;
+}
+
+/**
+ * trace_seq_vprintf - sequence printing of trace information
+ * @s: trace sequence descriptor
+ * @fmt: printf format string
+ *
+ * It returns 0 if the trace oversizes the buffer's free
+ * space, the number of characters printed, or a negative
+ * value in case of an error.
+ * *
+ * The tracer may use either sequence operations or its own
+ * copy to user routines. To simplify formating of a trace
+ * trace_seq_printf is used to store strings into a special
+ * buffer (@s). Then the output may be either used by
+ * the sequencer or pulled into another buffer.
+ */
+int
+trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
+{
+ int len;
+ int ret;
+
+ try_again:
+ TRACE_SEQ_CHECK_RET0(s);
+
+ len = (s->buffer_size - 1) - s->len;
+
+ ret = vsnprintf(s->buffer + s->len, len, fmt, args);
+
+ if (ret >= len) {
+ expand_buffer(s);
+ goto try_again;
+ }
+
+ if (ret > 0)
+ s->len += ret;
+
+ return ret;
+}
+
+/**
+ * trace_seq_puts - trace sequence printing of simple string
+ * @s: trace sequence descriptor
+ * @str: simple string to record
+ *
+ * The tracer may use either the sequence operations or its own
+ * copy to user routines. This function records a simple string
+ * into a special buffer (@s) for later retrieval by a sequencer
+ * or other mechanism.
+ */
+int trace_seq_puts(struct trace_seq *s, const char *str)
+{
+ int len;
+
+ TRACE_SEQ_CHECK_RET0(s);
+
+ len = strlen(str);
+
+ while (len > ((s->buffer_size - 1) - s->len))
+ expand_buffer(s);
+
+ TRACE_SEQ_CHECK_RET0(s);
+
+ memcpy(s->buffer + s->len, str, len);
+ s->len += len;
+
+ return len;
+}
+
+int trace_seq_putc(struct trace_seq *s, unsigned char c)
+{
+ TRACE_SEQ_CHECK_RET0(s);
+
+ while (s->len >= (s->buffer_size - 1))
+ expand_buffer(s);
+
+ TRACE_SEQ_CHECK_RET0(s);
+
+ s->buffer[s->len++] = c;
+
+ return 1;
+}
+
+void trace_seq_terminate(struct trace_seq *s)
+{
+ TRACE_SEQ_CHECK_RET(s);
+
+ /* There's always one character left on the buffer */
+ s->buffer[s->len] = 0;
+}
+
+int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp)
+{
+ TRACE_SEQ_CHECK(s);
+
+ switch (s->state) {
+ case TRACE_SEQ__GOOD:
+ return fprintf(fp, "%.*s", s->len, s->buffer);
+ case TRACE_SEQ__BUFFER_POISONED:
+ fprintf(fp, "%s\n", "Usage of trace_seq after it was destroyed");
+ break;
+ case TRACE_SEQ__MEM_ALLOC_FAILED:
+ fprintf(fp, "%s\n", "Can't allocate trace_seq buffer memory");
+ break;
+ }
+ return -1;
+}
+
+int trace_seq_do_printf(struct trace_seq *s)
+{
+ return trace_seq_do_fprintf(s, stdout);
+}
diff --git a/test.c b/test.c
new file mode 100644
index 0000000..7566fac
--- /dev/null
+++ b/test.c
@@ -0,0 +1,7 @@
+#include <event-parse.h>
+
+int main ()
+{
+ tep_load_plugins(NULL);
+ return 0;
+}
diff --git a/utest/.gitignore b/utest/.gitignore
new file mode 100644
index 0000000..3620cd0
--- /dev/null
+++ b/utest/.gitignore
@@ -0,0 +1 @@
+trace-utest
diff --git a/utest/Makefile b/utest/Makefile
new file mode 100644
index 0000000..160bdb4
--- /dev/null
+++ b/utest/Makefile
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: LGPL-2.1
+
+include $(src)/scripts/utils.mk
+
+TARGETS = $(bdir)/trace-utest
+
+OBJS =
+OBJS += trace-utest.o
+OBJS += traceevent-utest.o
+
+LIBS += -lcunit \
+ -ldl \
+ $(LIBTRACEEVENT_STATIC)
+
+OBJS := $(OBJS:%.o=$(bdir)/%.o)
+DEPS := $(OBJS:$(bdir)/%.o=$(bdir)/.%.d)
+
+$(OBJS): | $(bdir)
+$(DEPS): | $(bdir)
+
+$(bdir)/trace-utest: $(OBJS) $(LIBTRACEEVENT_STATIC)
+ $(Q)$(do_app_build)
+
+$(bdir)/%.o: %.c
+ $(Q)$(call do_fpic_compile)
+
+$(DEPS): $(bdir)/.%.d: %.c
+ $(Q)$(CC) -M $(CPPFLAGS) $(CFLAGS) $< > $@
+ $(Q)$(CC) -M -MT $(bdir)/$*.o $(CPPFLAGS) $(CFLAGS) $< > $@
+
+$(OBJS): $(bdir)/%.o : $(bdir)/.%.d
+
+dep_includes := $(wildcard $(DEPS))
+
+test: $(TARGETS)
+
+clean:
+ $(Q)$(call do_clean,$(TARGETS) $(bdir)/*.o $(bdir)/.*.d)
diff --git a/utest/README b/utest/README
new file mode 100644
index 0000000..87d6bd9
--- /dev/null
+++ b/utest/README
@@ -0,0 +1,17 @@
+
+Unit tests for libtraceevent library. The tests use CUnit framework:
+
+ http://cunit.sourceforge.net/
+
+which must be pre installed on the system, before building the unit tests.
+The framework can be downloaded, compiled and installed manually, or
+using a precompiled distro package:
+
+ Fedora:
+ CUnit
+ CUnit-devel
+
+ Ubuntu and Debian:
+ libcunit1
+ libcunit1-doc
+ libcunit1-dev
diff --git a/utest/trace-utest.c b/utest/trace-utest.c
new file mode 100644
index 0000000..1403c86
--- /dev/null
+++ b/utest/trace-utest.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2020, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
+ *
+ * Modified from libtracefs to libtraceevent:
+ * Copyright (C) 2021, VMware, Steven Rostedt <rostedt@goodmis.org>
+ *
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <stdlib.h>
+
+#include <CUnit/CUnit.h>
+#include <CUnit/Basic.h>
+
+#include "trace-utest.h"
+
+enum unit_tests {
+ RUN_NONE = 0,
+ RUN_TRACEEVENT = (1 << 0),
+ RUN_ALL = 0xFFFF
+};
+
+static void print_help(char **argv)
+{
+ printf("Usage: %s [OPTIONS]\n", basename(argv[0]));
+ printf("\t-s, --silent\tPrint test summary\n");
+ printf("\t-r, --run test\tRun specific test:\n");
+ printf("\t\t traceevent run libtraceevent tests\n");
+ printf("\t-h, --help\tPrint usage information\n");
+ exit(0);
+}
+
+int main(int argc, char **argv)
+{
+ CU_BasicRunMode verbose = CU_BRM_VERBOSE;
+ enum unit_tests tests = RUN_NONE;
+
+ for (;;) {
+ int c;
+ int index = 0;
+ const char *opts = "+hsr:";
+ static struct option long_options[] = {
+ {"silent", no_argument, NULL, 's'},
+ {"run", required_argument, NULL, 'r'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, 0}
+ };
+
+ c = getopt_long (argc, argv, opts, long_options, &index);
+ if (c == -1)
+ break;
+ switch (c) {
+ case 'r':
+ if (strcmp(optarg, "traceevent") == 0)
+ tests |= RUN_TRACEEVENT;
+ else
+ print_help(argv);
+ break;
+ case 's':
+ verbose = CU_BRM_SILENT;
+ break;
+ case 'h':
+ default:
+ print_help(argv);
+ break;
+ }
+ }
+
+ if (tests == RUN_NONE)
+ tests = RUN_ALL;
+
+ if (CU_initialize_registry() != CUE_SUCCESS) {
+ printf("Test registry cannot be initialized\n");
+ return -1;
+ }
+
+ if (tests & RUN_TRACEEVENT)
+ test_traceevent_lib();
+
+ CU_basic_set_mode(verbose);
+ CU_basic_run_tests();
+ CU_cleanup_registry();
+ return 0;
+}
diff --git a/utest/trace-utest.h b/utest/trace-utest.h
new file mode 100644
index 0000000..2aa3455
--- /dev/null
+++ b/utest/trace-utest.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ * Copyright (C) 2020, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
+ *
+ * Modified from libtracefs to libtraceevent:
+ * Copyright (C) 2021, VMware, Steven Rostedt <rostedt@goodmis.org>
+ *
+ */
+#ifndef _TRACE_UTEST_H_
+#define _TRACE_UTEST_H_
+
+void test_traceevent_lib(void);
+
+#endif /* _TRACE_UTEST_H_ */
diff --git a/utest/traceevent-utest.c b/utest/traceevent-utest.c
new file mode 100644
index 0000000..ebd5eb9
--- /dev/null
+++ b/utest/traceevent-utest.c
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2020, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
+ *
+ * Modified from libtracefs to libtraceevent:
+ * Copyright (C) 2021, VMware, Steven Rostedt <rostedt@goodmis.org>
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <dirent.h>
+#include <ftw.h>
+
+#include <CUnit/CUnit.h>
+#include <CUnit/Basic.h>
+
+#include "event-parse.h"
+#include "trace-seq.h"
+
+#define TRACEEVENT_SUITE "traceevent library"
+
+#define DYN_STR_EVENT_SYSTEM "irq"
+#define DYN_STR_FIELD "name"
+#define DYN_STRING "hello"
+#define DYN_STRING_FMT "irq=0 handler=hello"
+static const char dyn_str_event[] =
+ "name: irq_handler_entry\n"
+ "ID: 1\n"
+ "format:\n"
+ "\tfield:unsigned short common_type;\toffset:0;\tsize:2;\tsigned:0;\n"
+ "\tfield:unsigned char common_flags;\toffset:2;\tsize:1;\tsigned:0;\n"
+ "\tfield:unsigned char common_preempt_count;\toffset:3;\tsize:1;\tsigned:0;\n"
+ "\tfield:int common_pid;\toffset:4;\tsize:4;\tsigned:1;\n"
+ "\n"
+ "\tfield:int irq;\toffset:8;\tsize:4;\tsigned:1;\n"
+ "\tfield:__data_loc char[] name;\toffset:12;\tsize:4;\tsigned:1;\n"
+ "\n"
+ "print fmt: \"irq=%d handler=%s\", REC->irq, __get_str(name)\n";
+
+static char dyn_str_data[] = {
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ /* common type */ 1, 0x00,
+#else
+ /* common type */ 0x00, 1
+#endif
+ /* common flags */ 0x00,
+ /* common_preempt_count */ 0x00,
+ /* common_pid */ 0x00, 0x00, 0x00, 0x00,
+ /* irq */ 0x00, 0x00, 0x00, 0x00,
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ /* name : offset */ 16, 0x00,
+ /* name : length */ 6, 0x00,
+#else
+ /* name : length */ 0x00, 6,
+ /* name : offset */ 0x00, 16,
+#endif
+ /* name */ 'h', 'e', 'l', 'l', 'o', '\0',
+ /* padding */ 0x00, 0x00
+};
+static void *dyn_str_event_data = (void *)dyn_str_data;
+
+static const char dyn_str_old_event[] =
+ "name: irq_handler_entry\n"
+ "ID: 2\n"
+ "format:\n"
+ "\tfield:unsigned short common_type;\toffset:0;\tsize:2;\n"
+ "\tfield:unsigned char common_flags;\toffset:2;\tsize:1;\n"
+ "\tfield:unsigned char common_preempt_count;\toffset:3;\tsize:1;\n"
+ "\tfield:int common_pid;\toffset:4;\tsize:4;\n"
+ "\n"
+ "\tfield:int irq;\toffset:8;\tsize:4;\n"
+ "\tfield:__data_loc name;\toffset:12;\tsize:2;\n"
+ "\n"
+ "print fmt: \"irq=%d handler=%s\", REC->irq, __get_str(name)\n";
+
+static char dyn_str_old_data[] = {
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ /* common type */ 2, 0x00,
+#else
+ /* common type */ 0x00, 2
+#endif
+ /* common flags */ 0x00,
+ /* common_preempt_count */ 0x00,
+ /* common_pid */ 0x00, 0x00, 0x00, 0x00,
+ /* irq */ 0x00, 0x00, 0x00, 0x00,
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ /* name : offset */ 16, 0x00,
+#else
+ /* name : offset */ 0x00, 16,
+#endif
+ /* padding */ 0x00, 0x00,
+ /* name */ 'h', 'e', 'l', 'l', 'o', '\0',
+ /* padding */ 0x00, 0x00, 0x00
+};
+static void *dyn_str_old_event_data = (void *)dyn_str_old_data;
+
+#define CPUMASK_EVENT_SYSTEM "ipi"
+#define CPUMASK_EVENT_FIELD "cpumask"
+static const char cpumask_event_format[] =
+ "name: ipi_send_cpumask\n"
+ "ID: 3\n"
+ "format:\n"
+ "\tfield:unsigned short common_type;\toffset:0;\tsize:2;\n"
+ "\tfield:unsigned char common_flags;\toffset:2;\tsize:1;\n"
+ "\tfield:unsigned char common_preempt_count;\toffset:3;\tsize:1;\n"
+ "\tfield:int common_pid;\toffset:4;\tsize:4;\n"
+ "\n"
+ "\tfield:__data_loc cpumask_t *[] cpumask;\toffset:8;\tsize:4;\tsigned:0;\n"
+ "\n"
+ "print fmt: \"cpumask=%s\", __get_cpumask(cpumask)\n";
+
+/* Mind the endianness! */
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define DECL_CPUMASK_EVENT_DATA(name, args...) \
+ static char cpumask_##name##_event_data[] = { \
+ /* common type */ 3, 0x00, \
+ /* common flags */ 0x00, \
+ /* common_preempt_count */ 0x00, \
+ /* common_pid */ 0x00, 0x00, 0x00, 0x00, \
+ /* [offset, size] */ 16, 0x00, 8, 0x00, \
+ /* padding */ 0x00, 0x00, 0x00, 0x00, \
+ /* cpumask */ args, \
+}
+#else
+#define DECL_CPUMASK_EVENT_DATA(name, args...) \
+static char cpumask_##name##_event_data[] = { \
+ /* common type */ 0x00, 3, \
+ /* common flags */ 0x00, \
+ /* common_preempt_count */ 0x00, \
+ /* common_pid */ 0x00, 0x00, 0x00, 0x00, \
+ /* [offset, size] */ 0x00, 8, 0x00, 16, \
+ /* padding */ 0x00, 0x00, 0x00, 0x00, \
+ /* cpumask */ args, \
+}
+#endif
+
+#define SIZEOF_LONG0_FMT "[FAILED TO PARSE] s4=0 u4=0 s8=0 u8=0x0"
+#define SIZEOF_LONG4_FMT "int=4 unsigned=4 unsigned int=4 long=4 unsigned long=4 long long=8 unsigned long long=8 s4=4 u4=4 s8=8 u8=8"
+#define SIZEOF_LONG8_FMT "int=4 unsigned=4 unsigned int=4 long=8 unsigned long=8 long long=8 unsigned long long=8 s4=4 u4=4 s8=8 u8=8"
+
+static const char size_of_event[] =
+ "name: sizeof_event\n"
+ "ID: 23\n"
+ "format:\n"
+ "\tfield:unsigned short common_type;\toffset:0;\tsize:2;\tsigned:0;\n"
+ "\tfield:unsigned char common_flags;\toffset:2;\tsize:1;\tsigned:0;\n"
+ "\tfield:unsigned char common_preempt_count;\toffset:3;\tsize:1;\tsigned:0;\n"
+ "\tfield:int common_pid;\toffset:4;\tsize:4;\tsigned:1;\n"
+ "\n"
+ "\tfield:int s4;\toffset:8;\tsize:4;\tsigned:1;\n"
+ "\tfield:unsigned int u4;\toffset:12;\tsize:4;\tsigned:0;\n"
+ "\tfield:long long s8;\toffset:16;\tsize:8;\tsigned:1;\n"
+ "\tfield:unsigned long long u8;\toffset:24;\tsize:8;\tsigned:0;\n"
+ "\n"
+ "print fmt: \"int=%d unsigned=%d unsigned int=%d long=%d unsigned long=%d long long=%d unsigned long long=%d s4=%d u4=%d s8=%d u8=%d\", "
+ "sizeof(int), sizeof(unsigned), sizeof(unsigned int), sizeof(long), sizeof(unsigned long), "
+ "sizeof(long long), sizeof(unsigned long long), sizeof(REC->s4), "
+ "sizeof(REC->u4), sizeof(REC->s8), sizeof(REC->u8))\n";
+static char sizeof_data[] = {
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ /* common type */ 23, 0x00,
+#else
+ /* common type */ 0x00, 23
+#endif
+ /* common flags */ 0x00,
+ /* common_preempt_count */ 0x00,
+ /* common_pid */ 0x00, 0x00, 0x00, 0x00,
+ /* irq */ 0x00, 0x00, 0x00, 0x00,
+
+ /* s4 */ 0x00, 0x00, 0x00, 0x00,
+ /* u4 */ 0x00, 0x00, 0x00, 0x00,
+ /* s8 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ /* u8 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+static void *sizeof_event_data = (void *)sizeof_data;
+
+DECL_CPUMASK_EVENT_DATA(full, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff);
+#define CPUMASK_FULL "ARRAY[ff, ff, ff, ff, ff, ff, ff, ff]"
+#define CPUMASK_FULL_FMT "cpumask=0-63"
+
+DECL_CPUMASK_EVENT_DATA(empty, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+#define CPUMASK_EMPTY "ARRAY[00, 00, 00, 00, 00, 00, 00, 00]"
+#define CPUMASK_EMPTY_FMT "cpumask="
+
+DECL_CPUMASK_EVENT_DATA(half, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55);
+#define CPUMASK_HALF "ARRAY[55, 55, 55, 55, 55, 55, 55, 55]"
+#define CPUMASK_HALF_FMT "cpumask=0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62"
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+DECL_CPUMASK_EVENT_DATA(bytep1, 0x01, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+#define CPUMASK_BYTEP1 "ARRAY[01, 80, 00, 00, 00, 00, 00, 00]"
+#define CPUMASK_BYTEP1_FMT "cpumask=0,15"
+
+DECL_CPUMASK_EVENT_DATA(bytep2, 0x01, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00);
+#define CPUMASK_BYTEP2 "ARRAY[01, 00, 80, 00, 00, 00, 00, 00]"
+#define CPUMASK_BYTEP2_FMT "cpumask=0,23"
+
+DECL_CPUMASK_EVENT_DATA(bytepn, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80);
+#define CPUMASK_BYTEPN "ARRAY[01, 00, 00, 00, 00, 00, 00, 80]"
+#define CPUMASK_BYTEPN_FMT "cpumask=0,63"
+
+#else
+
+DECL_CPUMASK_EVENT_DATA(bytep1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x01);
+#define CPUMASK_BYTEP1 "ARRAY[00, 00, 00, 00, 00, 00, 80, 01]"
+#define CPUMASK_BYTEP1_FMT "cpumask=0,15"
+
+DECL_CPUMASK_EVENT_DATA(bytep2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x01);
+#define CPUMASK_BYTEP2 "ARRAY[00, 00, 00, 00, 00, 80, 00, 01]"
+#define CPUMASK_BYTEP2_FMT "cpumask=0,23"
+
+DECL_CPUMASK_EVENT_DATA(bytepn, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01);
+#define CPUMASK_BYTEPN "ARRAY[80, 00, 00, 00, 00, 00, 80, 01]"
+#define CPUMASK_BYTEPN_FMT "cpumask=0,63"
+#endif
+
+static struct tep_handle *test_tep;
+static struct trace_seq *test_seq;
+static struct trace_seq seq_storage;
+
+static void parse_dyn_str(const char *dyn_str, void *data, int size)
+{
+ struct tep_format_field *field;
+ struct tep_event *event;
+ struct tep_record record;
+
+ record.data = data;
+ record.size = size;
+
+ CU_TEST(tep_parse_format(test_tep, &event,
+ dyn_str, strlen(dyn_str),
+ DYN_STR_EVENT_SYSTEM) == TEP_ERRNO__SUCCESS);
+
+ field = tep_find_any_field(event, DYN_STR_FIELD);
+ CU_TEST(field != NULL);
+ trace_seq_reset(test_seq);
+ tep_print_field_content(test_seq, data, size, field);
+ CU_TEST(strcmp(test_seq->buffer, DYN_STRING) == 0);
+
+ trace_seq_reset(test_seq);
+ tep_print_event(test_tep, test_seq, &record, "%s", TEP_PRINT_INFO);
+ trace_seq_do_printf(test_seq);
+ CU_TEST(strcmp(test_seq->buffer, DYN_STRING_FMT) == 0);
+}
+
+static void test_parse_dyn_str_event(void)
+{
+ parse_dyn_str(dyn_str_event, dyn_str_event_data, sizeof(dyn_str_data));
+}
+
+static void test_parse_dyn_str_old_event(void)
+{
+ parse_dyn_str(dyn_str_old_event, dyn_str_old_event_data, sizeof(dyn_str_old_data));
+}
+
+static void parse_cpumask(const char *format, void *data, int size,
+ const char* expected_raw, const char* expected)
+{
+ struct tep_format_field *field;
+ struct tep_event *event;
+ struct tep_record record;
+
+ record.data = data;
+ record.size = size;
+
+ CU_TEST(tep_parse_format(test_tep, &event,
+ format, strlen(format),
+ CPUMASK_EVENT_SYSTEM) == TEP_ERRNO__SUCCESS);
+
+ field = tep_find_any_field(event, CPUMASK_EVENT_FIELD);
+ CU_TEST(field != NULL);
+
+ trace_seq_reset(test_seq);
+ tep_print_field_content(test_seq, data, size, field);
+ CU_TEST(strcmp(test_seq->buffer, expected_raw) == 0);
+
+ trace_seq_reset(test_seq);
+ tep_print_event(test_tep, test_seq, &record, "%s", TEP_PRINT_INFO);
+ trace_seq_do_printf(test_seq);
+ CU_TEST(strcmp(test_seq->buffer, expected) == 0);
+}
+
+static void test_parse_cpumask_full(void)
+{
+ parse_cpumask(cpumask_event_format,
+ cpumask_full_event_data, sizeof(cpumask_full_event_data),
+ CPUMASK_FULL, CPUMASK_FULL_FMT);
+}
+
+static void test_parse_cpumask_empty(void)
+{
+ parse_cpumask(cpumask_event_format,
+ cpumask_empty_event_data, sizeof(cpumask_empty_event_data),
+ CPUMASK_EMPTY, CPUMASK_EMPTY_FMT);
+}
+
+static void test_parse_cpumask_half(void)
+{
+ parse_cpumask(cpumask_event_format,
+ cpumask_half_event_data, sizeof(cpumask_half_event_data),
+ CPUMASK_HALF, CPUMASK_HALF_FMT);
+}
+
+static void test_parse_cpumask_bytep1(void)
+{
+ parse_cpumask(cpumask_event_format,
+ cpumask_bytep1_event_data, sizeof(cpumask_bytep1_event_data),
+ CPUMASK_BYTEP1, CPUMASK_BYTEP1_FMT);
+}
+
+static void test_parse_cpumask_bytep2(void)
+{
+ parse_cpumask(cpumask_event_format,
+ cpumask_bytep2_event_data, sizeof(cpumask_bytep2_event_data),
+ CPUMASK_BYTEP2, CPUMASK_BYTEP2_FMT);
+}
+
+static void test_parse_cpumask_bytepn(void)
+{
+ parse_cpumask(cpumask_event_format,
+ cpumask_bytepn_event_data, sizeof(cpumask_bytepn_event_data),
+ CPUMASK_BYTEPN, CPUMASK_BYTEPN_FMT);
+}
+
+static void test_parse_sizeof(int long_size, int value, const char *system,
+ const char *test_str)
+{
+ struct tep_event *event;
+ struct tep_record record;
+ char *sizeof_event;
+ char *p;
+
+ tep_set_long_size(test_tep, long_size);
+
+ record.data = sizeof_event_data;
+ record.size = sizeof(sizeof_data);
+
+ sizeof_event = strdup(size_of_event);
+ CU_TEST(sizeof_event != NULL);
+
+ /* Set a new id */
+ p = strstr(sizeof_event, "ID: 2");
+ p[5] = '0' + value;
+
+ /* Handles endianess */
+ *(unsigned short *)sizeof_data = 20 + value;
+
+ CU_TEST(tep_parse_format(test_tep, &event, sizeof_event,
+ strlen(sizeof_event),
+ system) == TEP_ERRNO__SUCCESS);
+
+ trace_seq_reset(test_seq);
+ tep_print_event(test_tep, test_seq, &record, "%s", TEP_PRINT_INFO);
+ trace_seq_do_printf(test_seq);
+ CU_TEST(strcmp(test_seq->buffer, test_str) == 0);
+
+ free(sizeof_event);
+}
+
+static void test_parse_sizeof8(void)
+{
+ test_parse_sizeof(8, 3, "sizeof8", SIZEOF_LONG8_FMT);
+}
+
+static void test_parse_sizeof4(void)
+{
+ test_parse_sizeof(4, 4, "sizeof4", SIZEOF_LONG4_FMT);
+}
+
+static void test_parse_sizeof_undef(void)
+{
+ test_parse_sizeof(0, 5, "sizeof_undef", SIZEOF_LONG0_FMT);
+}
+
+static int test_suite_destroy(void)
+{
+ tep_free(test_tep);
+ trace_seq_destroy(test_seq);
+ return 0;
+}
+
+static int test_suite_init(void)
+{
+ test_seq = &seq_storage;
+ trace_seq_init(test_seq);
+ test_tep = tep_alloc();
+ if (!test_tep)
+ return 1;
+ return 0;
+}
+
+void test_traceevent_lib(void)
+{
+ CU_pSuite suite = NULL;
+
+ suite = CU_add_suite(TRACEEVENT_SUITE, test_suite_init, test_suite_destroy);
+ if (suite == NULL) {
+ fprintf(stderr, "Suite \"%s\" cannot be ceated\n", TRACEEVENT_SUITE);
+ return;
+ }
+ CU_add_test(suite, "parse dynamic string event",
+ test_parse_dyn_str_event);
+ CU_add_test(suite, "parse old dynamic string event",
+ test_parse_dyn_str_old_event);
+ CU_add_test(suite, "parse full cpumask",
+ test_parse_cpumask_full);
+ CU_add_test(suite, "parse empty cpumask",
+ test_parse_cpumask_empty);
+ CU_add_test(suite, "parse half-filled cpumask",
+ test_parse_cpumask_half);
+ CU_add_test(suite, "parse cpumask spanning 2 bytes",
+ test_parse_cpumask_bytep1);
+ CU_add_test(suite, "parse cpumask spanning 3 bytes",
+ test_parse_cpumask_bytep2);
+ CU_add_test(suite, "parse cpumask spanning all bytes",
+ test_parse_cpumask_bytepn);
+ CU_add_test(suite, "parse sizeof() 8byte values",
+ test_parse_sizeof8);
+ CU_add_test(suite, "parse sizeof() 4byte values",
+ test_parse_sizeof4);
+ CU_add_test(suite, "parse sizeof() no long size defined",
+ test_parse_sizeof_undef);
+}
