1696Spaul#!/usr/sbin/dtrace -Zs
214260Spst/*
3696Spaul * j_methodcalls.d - count Java method calls DTrace.
4696Spaul *                   Written for the Java hotspot DTrace provider.
5696Spaul *
6696Spaul * $Id: j_methodcalls.d 19 2007-09-12 07:47:59Z brendan $
7696Spaul *
8696Spaul * This traces activity from all Java processes on the system with hotspot
9696Spaul * provider support (1.6.0) and the flag "+ExtendedDTraceProbes". eg,
10696Spaul * java -XX:+ExtendedDTraceProbes classfile
11696Spaul *
12696Spaul * USAGE: j_methodcalls.d 	# hit Ctrl-C to end
13696Spaul *
14696Spaul * FIELDS:
15696Spaul *		PID		Process ID
16696Spaul *		COUNT		Number of calls during sample
171153Sjkh *		CLASS.METHOD	Java class and method name
18696Spaul *
19696Spaul * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
20696Spaul *
21696Spaul * CDDL HEADER START
22696Spaul *
23696Spaul *  The contents of this file are subject to the terms of the
24696Spaul *  Common Development and Distribution License, Version 1.0 only
25696Spaul *  (the "License").  You may not use this file except in compliance
26696Spaul *  with the License.
27696Spaul *
28696Spaul *  You can obtain a copy of the license at Docs/cddl1.txt
29696Spaul *  or http://www.opensolaris.org/os/licensing.
3018597Speter *  See the License for the specific language governing permissions
31696Spaul *  and limitations under the License.
32696Spaul *
33696Spaul * CDDL HEADER END
34696Spaul *
35696Spaul * 09-Sep-2007	Brendan Gregg	Created this.
36696Spaul */
37696Spaul
38696Spaul#pragma D option quiet
39696Spaul
401741Srichdtrace:::BEGIN
411741Srich{
4217142Sjkh	printf("Tracing... Hit Ctrl-C to end.\n");
4317142Sjkh}
44696Spaul
45696Spaulhotspot*:::method-entry
46696Spaul{
47696Spaul	this->class = (char *)copyin(arg1, arg2 + 1);
48696Spaul	this->class[arg2] = '\0';
491741Srich	this->method = (char *)copyin(arg3, arg4 + 1);
501741Srich	this->method[arg4] = '\0';
51696Spaul	this->name = strjoin(strjoin(stringof(this->class), "."),
521741Srich	    stringof(this->method));
53696Spaul	@calls[pid, this->name] = count();
5418597Speter}
55696Spaul
5618597Speterdtrace:::END
5718597Speter{
5818597Speter	printf(" %6s %8s %s\n", "PID", "COUNT", "CLASS.METHOD");
5918597Speter	printa(" %6d %@8d %s\n", @calls);
6018597Speter}
61696Spaul