#!/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. method_invocation_tree.d -c "java ..."
* 2. method_invocation_tree.d -p JAVA_PID
*
* This script prints tree of Java and JNI method invocations.
*
* Notes:
* - These probes are disabled by default since it incurs performance
* overhead to the application. To trace the method-entry and
* method-exit probes, you need to turn on the ExtendedDTraceProbes VM
* option.
* You can either start the application with -XX:+ExtendedDTraceProbes
* option or use the jinfo command to enable it at runtime as follows:
*
* jinfo -flag +ExtendedDTraceProbes <java_pid>
*
*/
#pragma D option quiet
#pragma D option destructive
#pragma D option defaultargs
#pragma D option bufsize=16m
#pragma D option aggrate=100ms
self char *str_ptr;
self string class_name;
self string method_name;
self string signature;
self int indent;
BEGIN
{
SAMPLE_NAME = "hotspot method invocation tracing";
printf("BEGIN %s\n\n", SAMPLE_NAME);
}
hotspot$target:::*
/!self->indent/
{
self->indent = 0;
}
/*
* hotspot:::method-entry, hotspot:::method-return probe arguments:
* arg0: uintptr_t, Java thread id
* arg1: char*, a pointer to mUTF-8 string containing the name of
* the class of the method being entered
* arg2: uintptr_t, the length of the class name (in bytes)
* arg3: char*, a pointer to mUTF-8 string data which contains the
* name of the method being entered
* arg4: uintptr_t, the length of the method name (in bytes)
* arg5: char*, a pointer to mUTF-8 string data which contains the
* signature of the method being entered
* arg6: uintptr_t, the length of the signature(in bytes)
*/
hotspot$target:::method-return
{
self->indent --;
METHOD_RETURN_CNT ++
}
hotspot$target:::method-entry
{
self->indent ++;
METHOD_ENTRY_CNT ++;
self->str_ptr = (char*) copyin(arg1, arg2+1);
self->str_ptr[arg2] = '\0';
self->class_name = (string) self->str_ptr;
self->str_ptr = (char*) copyin(arg3, arg4+1);
self->str_ptr[arg4] = '\0';
self->method_name = (string) self->str_ptr;
self->str_ptr = (char*) copyin(arg5, arg6+1);
self->str_ptr[arg6] = '\0';
self->signature = (string) self->str_ptr;
printf("%-10u%*s%s:%s:%s\n",
tid, self->indent, "", self->class_name,
self->method_name, self->signature);
}
hotspot_jni$target:::*_entry
{
printf("%-10u%*sJNI:%s\n", tid, self->indent+1, "", probename);
}
:::END
{
printf("METHOD_ENTRY_CNT: %10d\n", METHOD_ENTRY_CNT);
printf("METHOD_RETURN_CNT: %10d\n", METHOD_RETURN_CNT);
printf("\nEND of %s\n", SAMPLE_NAME);
}
syscall::rexit:entry,
syscall::exit:entry
/pid == $target/
{
exit(0);
}