62 lines
1.7 KiB
D
Executable File
62 lines
1.7 KiB
D
Executable File
#!/usr/sbin/dtrace -Zs
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/*
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* j_objnew.d - report Java object allocation using DTrace.
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* Written for the Java hotspot DTrace provider.
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*
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* $Id: j_objnew.d,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $
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*
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* This traces activity from all Java processes on the system with hotspot
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* provider support (1.6.0) and the flag "+ExtendedDTraceProbes". eg,
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* java -XX:+ExtendedDTraceProbes classfile
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*
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* USAGE: j_objnew.d # hit Ctrl-C to end
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*
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* FIELDS:
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* PID Process ID
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* OBJS Number of objects created
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* CLASS.METHOD Java class and method name
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*
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* COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
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*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at Docs/cddl1.txt
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* CDDL HEADER END
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*
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* 09-Sep-2007 Brendan Gregg Created this.
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*/
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#pragma D option quiet
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dtrace:::BEGIN
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{
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printf("Tracing... Hit Ctrl-C to end.\n");
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}
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hotspot*:::object-alloc
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{
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this->class = (char *)copyin(arg1, arg2 + 1);
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this->class[arg2] = '\0';
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@objs[pid, stringof(this->class)] = count();
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@dist[pid, stringof(this->class)] = quantize(arg3);
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}
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dtrace:::END
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{
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printf("Java object allocation byte distributions by pid and class,\n");
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printa(@dist);
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printf("Java object allocation count by pid and class,\n\n");
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printf(" %6s %8s %s\n", "PID", "OBJS", "CLASS");
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printa(" %6d %8@d %s\n", @objs);
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}
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