diff options
Diffstat (limited to 'cddl/contrib/dtracetoolkit/Java/j_profile.d')
-rwxr-xr-x | cddl/contrib/dtracetoolkit/Java/j_profile.d | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/cddl/contrib/dtracetoolkit/Java/j_profile.d b/cddl/contrib/dtracetoolkit/Java/j_profile.d new file mode 100755 index 0000000..4ff009e --- /dev/null +++ b/cddl/contrib/dtracetoolkit/Java/j_profile.d @@ -0,0 +1,78 @@ +#!/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); +} |