1#!/usr/sbin/dtrace -Zs
2/*
3 * j_package.d - count Java class loads by package using DTrace.
4 *               Written for the Java hotspot DTrace provider.
5 *
6 * $Id: j_package.d 19 2007-09-12 07:47:59Z brendan $
7 *
8 * This traces activity from all Java processes on the system with hotspot
9 * provider support (1.6.0).
10 *
11 * USAGE: j_package.d 		# hit Ctrl-C to end
12 *
13 * FIELDS:
14 *		PID		Process ID
15 *		LOADS		Class loads during trace
16 *		PACKAGE		Package name from class
17 *
18 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
19 *
20 * CDDL HEADER START
21 *
22 *  The contents of this file are subject to the terms of the
23 *  Common Development and Distribution License, Version 1.0 only
24 *  (the "License").  You may not use this file except in compliance
25 *  with the License.
26 *
27 *  You can obtain a copy of the license at Docs/cddl1.txt
28 *  or http://www.opensolaris.org/os/licensing.
29 *  See the License for the specific language governing permissions
30 *  and limitations under the License.
31 *
32 * CDDL HEADER END
33 *
34 * 09-Sep-2007	Brendan Gregg	Created this.
35 */
36
37#pragma D option quiet
38
39dtrace:::BEGIN
40{
41	printf("Tracing... Hit Ctrl-C to end.\n");
42}
43
44hotspot*:::class-loaded
45{
46	this->class = (char *)copyin(arg0, arg1 + 1);
47	this->class[arg1] = '\0';
48
49	@loads[pid, dirname(stringof(this->class))] = count();
50}
51
52dtrace:::END
53{
54	printf("   %6s %8s  %s\n", "PID", "LOADS", "PACKAGE");
55	printa("   %6d %@8d  %s\n", @loads);
56}
57