#!/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,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_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); }