#!/usr/sbin/dtrace -Zs
/*
* j_methodcalls.d - count Java method calls DTrace.
* Written for the Java hotspot DTrace provider.
*
* $Id: j_methodcalls.d 19 2007-09-12 07:47:59Z brendan $
*
* This traces activity from all Java processes on the system with hotspot
* provider support (1.6.0) and the flag "+ExtendedDTraceProbes". eg,
* java -XX:+ExtendedDTraceProbes classfile
*
* USAGE: j_methodcalls.d # hit Ctrl-C to end
*
* FIELDS:
* PID Process ID
* COUNT Number of calls during sample
* CLASS.METHOD Java class and method name
*
* 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
dtrace:::BEGIN
{
printf("Tracing... Hit Ctrl-C to end.\n");
}
hotspot*:::method-entry
{
this->class = (char *)copyin(arg1, arg2 + 1);
this->class[arg2] = '\0';
this->method = (char *)copyin(arg3, arg4 + 1);
this->method[arg4] = '\0';
this->name = strjoin(strjoin(stringof(this->class), "."),
stringof(this->method));
@calls[pid, this->name] = count();
}
dtrace:::END
{
printf(" %6s %8s %s\n", "PID", "COUNT", "CLASS.METHOD");
printa(" %6d %@8d %s\n", @calls);
}