mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-27 05:21:08 +01:00
79 lines
2.4 KiB
D
Executable File
79 lines
2.4 KiB
D
Executable File
#!/usr/sbin/dtrace -CZs
|
|
/*
|
|
* j_profile.d - sample stack traces with Java translations using DTrace.
|
|
*
|
|
* USAGE: j_profile.d { -p PID | -c cmd } # hit Ctrl-C to end
|
|
* $Id: j_profile.d 19 2007-09-12 07:47:59Z brendan $
|
|
*
|
|
*
|
|
* This samples stack traces for the process specified. This stack trace
|
|
* will cross the JVM and system libraries, and insert translations for Java
|
|
* stack frames where appropriate. This is best explained with an example
|
|
* stack frame output,
|
|
*
|
|
* Func_loop.func_c()V
|
|
* Func_loop.func_b()V
|
|
* Func_loop.func_a()V
|
|
* Func_loop.main([Ljava/lang/String;)V
|
|
* StubRoutines (1)
|
|
* libjvm.so`__1cJJavaCallsLcall_helper6FpnJJavaValue_pnMmethodHan
|
|
* libjvm.so`__1cCosUos_exception_wrapper6FpFpnJJavaValue_pnMmetho
|
|
* libjvm.so`__1cJJavaCallsEcall6FpnJJavaValue_nMmethodHandle_pnRJ
|
|
* libjvm.so`__1cRjni_invoke_static6FpnHJNIEnv__pnJJavaValue_pnI_j
|
|
* libjvm.so`jni_CallStaticVoidMethod+0x15d
|
|
* java`JavaMain+0xd30
|
|
* libc.so.1`_thr_setup+0x52
|
|
* libc.so.1`_lwp_start
|
|
* 101
|
|
*
|
|
* The lines at the top are Java frames, followed by the JVM (libjvm.so).
|
|
* The JVM symbols may be translated by passing the output through c++filt.
|
|
*
|
|
* COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
|
|
*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License, Version 1.0 only
|
|
* (the "License"). You may not use this file except in compliance
|
|
* with the License.
|
|
*
|
|
* You can obtain a copy of the license at Docs/cddl1.txt
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* CDDL HEADER END
|
|
*
|
|
* 09-Sep-2007 Brendan Gregg Created this.
|
|
*/
|
|
|
|
#pragma D option quiet
|
|
#pragma D option jstackstrsize=1024
|
|
|
|
/*
|
|
* Tunables
|
|
*/
|
|
#define DEPTH 10 /* stack depth, frames */
|
|
#define RATE 101 /* sampling rate, Hertz */
|
|
#define TOP 25 /* number of stacks to output */
|
|
|
|
dtrace:::BEGIN
|
|
{
|
|
printf("Sampling %d-level stacks at %d Hertz... Hit Ctrl-C to end.\n",
|
|
DEPTH, RATE);
|
|
}
|
|
|
|
profile-RATE
|
|
/pid == $target/
|
|
{
|
|
@stacks[jstack(DEPTH)] = count();
|
|
}
|
|
|
|
dtrace:::END
|
|
{
|
|
trunc(@stacks, TOP);
|
|
printf("Top %d most frequently sampled stacks,\n", TOP);
|
|
printa(@stacks);
|
|
}
|