NAME

j_profile.d - sample stack traces with Java translations using DTrace.

SYNOPSIS

DESCRIPTION

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.

OS

Solaris

STABILITY

Evolving - uses the DTrace hotspot provider, which may change as additional features are introduced. Check Java/Readme to see what version these scripts are based on.

EXAMPLES

Default output,: # j_profile.d

DOCUMENTATION

See the DTraceToolkit for further documentation under the Examples, Notes and Docs directories. The example files may be especially useful as they aim to demonstrate how to interpret the output.

EXIT

j_profile.d will run until Ctrl-C is hit.

AUTHOR

Brendan Gregg [CA, USA]