1#!/usr/sbin/dtrace -Zs
2/*
3 * j_who.d - trace Java calls by process using DTrace.
4 *           Written for the Java hotspot DTrace provider.
5 *
6 * $Id: j_who.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_who.d 		# hit Ctrl-C to end
12 *
13 * FIELDS:
14 *		PID		Process ID of Java
15 *		UID		User ID of the owner
16 *		CALLS		Number of calls made (a measure of activity)
17 *		ARGS		Process name and arguments
18 *
19 * The argument list is truncated at 55 characters (up to 80 is easily
20 * available). To easily read the full argument list, use other system tools;
21 * on Solaris use "pargs PID".
22 *
23 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
24 *
25 * CDDL HEADER START
26 *
27 *  The contents of this file are subject to the terms of the
28 *  Common Development and Distribution License, Version 1.0 only
29 *  (the "License").  You may not use this file except in compliance
30 *  with the License.
31 *
32 *  You can obtain a copy of the license at Docs/cddl1.txt
33 *  or http://www.opensolaris.org/os/licensing.
34 *  See the License for the specific language governing permissions
35 *  and limitations under the License.
36 *
37 * CDDL HEADER END
38 *
39 * 09-Sep-2007	Brendan Gregg	Created this.
40 */
41
42#pragma D option quiet
43
44dtrace:::BEGIN
45{
46	printf("Tracing... Hit Ctrl-C to end.\n");
47}
48
49hotspot*:::Call*-entry
50{
51	@calls[pid, uid, curpsinfo->pr_psargs] = count();
52}
53
54dtrace:::END
55{
56	printf("   %6s %6s %6s %-55s\n", "PID", "UID", "CALLS", "ARGS");
57	printa("   %6d %6d %@6d %-55.55s\n", @calls);
58}
59