src/llvm-project/lldb/test/API/tools/lldb-server/memory-allocation/TestGdbRemoteMemoryAllocation.py

import gdbremote_testcase
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil

supported_linux_archs = ["x86_64", "i386"]
supported_oses = ["linux", "windows"] + lldbplatformutil.getDarwinOSTriples()


class TestGdbRemoteMemoryAllocation(gdbremote_testcase.GdbRemoteTestCaseBase):
    def allocate(self, size, permissions):
        self.test_sequence.add_log_lines(
            [
                "read packet: $_M{:x},{}#00".format(size, permissions),
                {
                    "direction": "send",
                    "regex": r"^\$([0-9a-f]+)#[0-9a-fA-F]{2}$",
                    "capture": {1: "addr"},
                },
            ],
            True,
        )
        context = self.expect_gdbremote_sequence()
        self.assertIsNotNone(context)

        addr = int(context.get("addr"), 16)
        self.test_sequence.add_log_lines(
            [
                "read packet: $qMemoryRegionInfo:{:x}#00".format(addr),
                {
                    "direction": "send",
                    "regex": r"^\$start:([0-9a-fA-F]+);size:([0-9a-fA-F]+);permissions:([rwx]*);.*#[0-9a-fA-F]{2}$",
                    "capture": {1: "addr", 2: "size", 3: "permissions"},
                },
                "read packet: $_m{:x}#00".format(addr),
                "send packet: $OK#00",
            ],
            True,
        )
        context = self.expect_gdbremote_sequence()
        self.assertIsNotNone(context)

        self.assertEqual(addr, int(context.get("addr"), 16))
        self.assertLessEqual(size, int(context.get("size"), 16))
        self.assertEqual(permissions, context.get("permissions"))

    @skipIf(oslist=no_match(supported_oses))
    @skipIf(oslist=["linux"], archs=no_match(supported_linux_archs))
    @expectedFailureDarwin(
        archs=["arm64", "arm64e"]
    )  # Memory cannot be writable and executable
    @expectedFailureAll(
        oslist=["windows"]
    )  # Memory allocated with incorrect permissions
    def test_supported(self):
        """Make sure (de)allocation works on platforms where it's supposed to
        work"""
        self.build()
        self.set_inferior_startup_launch()
        procs = self.prep_debug_monitor_and_inferior()

        self.allocate(0x1000, "r")
        self.allocate(0x2000, "rw")
        self.allocate(0x100, "rx")
        self.allocate(0x1100, "rwx")

    @skipIf(oslist=["linux"], archs=supported_linux_archs)
    @skipIf(oslist=supported_oses)
    def test_unsupported(self):
        """Make sure we get an "unsupported" error on platforms where the
        feature is not implemented."""

        self.build()
        self.set_inferior_startup_launch()
        procs = self.prep_debug_monitor_and_inferior()

        self.test_sequence.add_log_lines(
            [
                "read packet: $_M1000,rw#00",
                "send packet: $#00",
            ],
            True,
        )
        self.expect_gdbremote_sequence()

    def test_bad_packet(self):
        """Make sure we get a proper error for malformed packets."""

        self.build()
        self.set_inferior_startup_launch()
        procs = self.prep_debug_monitor_and_inferior()

        def e():
            return {
                "direction": "send",
                "regex": r"^\$E([0-9a-fA-F]+){2}#[0-9a-fA-F]{2}$",
            }

        self.test_sequence.add_log_lines(
            [
                "read packet: $_M#00",
                e(),
                "read packet: $_M1x#00",
                e(),
                "read packet: $_M1:#00",
                e(),
                "read packet: $_M1,q#00",
                e(),
                "read packet: $_m#00",
                e(),
            ],
            True,
        )
        self.expect_gdbremote_sequence()