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#!/usr/sbin/dtrace -Zs
/*
* j_package.d - count Java class loads by package using DTrace.
* Written for the Java hotspot DTrace provider.
*
* $Id: j_package.d 19 2007-09-12 07:47:59Z brendan $
*
* This traces activity from all Java processes on the system with hotspot
* provider support (1.6.0).
*
* USAGE: j_package.d # hit Ctrl-C to end
*
* FIELDS:
* PID Process ID
* LOADS Class loads during trace
* PACKAGE Package name from class
*
* 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*:::class-loaded
{
this->class = (char *)copyin(arg0, arg1 + 1);
this->class[arg1] = '\0';
@loads[pid, dirname(stringof(this->class))] = count();
}
dtrace:::END
{
printf(" %6s %8s %s\n", "PID", "LOADS", "PACKAGE");
printa(" %6d %@8d %s\n", @loads);
}
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