3 * j_who.d - trace Java calls by process using DTrace.
4 * Written for the Java hotspot DTrace provider.
6 * $Id: j_who.d 19 2007-09-12 07:47:59Z brendan $
8 * This traces activity from all Java processes on the system with hotspot
9 * provider support (1.6.0).
11 * USAGE: j_who.d # hit Ctrl-C to end
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
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".
23 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
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
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.
39 * 09-Sep-2007 Brendan Gregg Created this.
42 #pragma D option quiet
46 printf("Tracing... Hit Ctrl-C to end.\n");
49 hotspot*:::Call*-entry
51 @calls[pid, uid, curpsinfo->pr_psargs] = count();
56 printf(" %6s %6s %6s %-55s\n", "PID", "UID", "CALLS", "ARGS");
57 printa(" %6d %6d %@6d %-55.55s\n", @calls);