#!/usr/sbin/dtrace -Zs /* * j_who.d - trace Java calls by process using DTrace. * Written for the Java hotspot DTrace provider. * * $Id: j_who.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * This traces activity from all Java processes on the system with hotspot * provider support (1.6.0). * * USAGE: j_who.d # hit Ctrl-C to end * * FIELDS: * PID Process ID of Java * UID User ID of the owner * CALLS Number of calls made (a measure of activity) * ARGS Process name and arguments * * The argument list is truncated at 55 characters (up to 80 is easily * available). To easily read the full argument list, use other system tools; * on Solaris use "pargs PID". * * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. * * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at Docs/cddl1.txt * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * CDDL HEADER END * * 09-Sep-2007 Brendan Gregg Created this. */ #pragma D option quiet dtrace:::BEGIN { printf("Tracing... Hit Ctrl-C to end.\n"); } hotspot*:::Call*-entry { @calls[pid, uid, curpsinfo->pr_psargs] = count(); } dtrace:::END { printf(" %6s %6s %6s %-55s\n", "PID", "UID", "CALLS", "ARGS"); printa(" %6d %6d %@6d %-55.55s\n", @calls); }