1#!/usr/sbin/dtrace -Zs
2/*
3 * j_events.d - count Java events using DTrace.
4 *              Written for the Java hotspot DTrace provider.
5 *
6 * $Id: j_events.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
7 *
8 * This traces activity from all Java processes on the system with hotspot
9 * provider support (1.6.0). Some events such as method calls are only
10 * visible when using the flag "+ExtendedDTraceProbes". eg,
11 * java -XX:+ExtendedDTraceProbes classfile
12 *
13 * USAGE: j_events.d 		# hit Ctrl-C to end
14 *
15 * FIELDS:
16 *		PID		Process ID
17 *		EVENT		Event name (DTrace probe name)
18 *		COUNT		Number of calls during sample
19 *
20 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
21 *
22 * CDDL HEADER START
23 *
24 *  The contents of this file are subject to the terms of the
25 *  Common Development and Distribution License, Version 1.0 only
26 *  (the "License").  You may not use this file except in compliance
27 *  with the License.
28 *
29 *  You can obtain a copy of the license at Docs/cddl1.txt
30 *  or http://www.opensolaris.org/os/licensing.
31 *  See the License for the specific language governing permissions
32 *  and limitations under the License.
33 *
34 * CDDL HEADER END
35 *
36 * 09-Sep-2007	Brendan Gregg	Created this.
37 */
38
39#pragma D option quiet
40
41dtrace:::BEGIN
42{
43	printf("Tracing... Hit Ctrl-C to end.\n");
44}
45
46/* this matches both hotspot and hotspot_jni providers */
47hotspot*:::
48{
49	@calls[pid, probename] = count();
50}
51
52dtrace:::END
53{
54	printf(" %6s  %-36s %8s\n", "PID", "EVENT", "COUNT");
55	printa(" %6d  %-36s %@8d\n", @calls);
56}
57