| #!/usr/sbin/dtrace -Zs |
| |
| /* |
| * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| */ |
| |
| /* |
| * Usage: |
| * 1. hotspot_jni_calls_stat.d -c "java ..." |
| * 2. hotspot_jni_calls_stat.d -p JAVA_PID |
| * |
| * This script collects statistics about how many times particular JNI |
| * method has been called. |
| * |
| */ |
| |
| |
| #pragma D option quiet |
| #pragma D option destructive |
| #pragma D option defaultargs |
| #pragma D option bufsize=16m |
| #pragma D option aggrate=100ms |
| |
| |
| :::BEGIN |
| { |
| printf("BEGIN hotspot_jni tracing\n"); |
| } |
| |
| |
| hotspot_jni$target:::*-entry |
| { |
| JNI_CALLS ++; |
| @jni_calls[probename] = count(); |
| } |
| |
| :::END |
| { |
| printa("%10@d %s\n", @jni_calls); |
| printf("\n"); |
| printf("Total number of JNI calls: %d\n", JNI_CALLS); |
| |
| printf("\nEND hotspot_jni tracing.\n"); |
| } |
| |
| syscall::rexit:entry, |
| syscall::exit:entry |
| /pid == $target/ |
| { |
| exit(0); |
| } |