#!/usr/sbin/dtrace -Zs /* * j_objnew.d - report Java object allocation using DTrace. * Written for the Java hotspot DTrace provider. * * $Id: j_objnew.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) and the flag "+ExtendedDTraceProbes". eg, * java -XX:+ExtendedDTraceProbes classfile * * USAGE: j_objnew.d # hit Ctrl-C to end * * FIELDS: * PID Process ID * OBJS Number of objects created * CLASS.METHOD Java class and method name * * 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*:::object-alloc { this->class = (char *)copyin(arg1, arg2 + 1); this->class[arg2] = '\0'; @objs[pid, stringof(this->class)] = count(); @dist[pid, stringof(this->class)] = quantize(arg3); } dtrace:::END { printf("Java object allocation byte distributions by pid and class,\n"); printa(@dist); printf("Java object allocation count by pid and class,\n\n"); printf(" %6s %8s %s\n", "PID", "OBJS", "CLASS"); printa(" %6d %8@d %s\n", @objs); }