114 lines
3.0 KiB
D
Executable File
114 lines
3.0 KiB
D
Executable File
#!/usr/sbin/dtrace -Zs
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/*
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* j_calls.d - count Java calls (method/...) using DTrace.
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* Written for the Java hotspot DTrace provider.
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*
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* $Id: j_calls.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). Method calls and object allocation are only
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* visible when using the flag "+ExtendedDTraceProbes". eg,
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* java -XX:+ExtendedDTraceProbes classfile
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*
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* USAGE: j_calls.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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* TYPE Type of call (see below)
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* NAME Name of call
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* COUNT Number of calls during sample
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*
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* TYPEs:
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* cload class load
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* method method call
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* mcompile method compile
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* mload compiled method load
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* oalloc object alloc
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* thread thread start
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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*:::method-entry
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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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this->method = (char *)copyin(arg3, arg4 + 1);
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this->method[arg4] = '\0';
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this->name = strjoin(strjoin(stringof(this->class), "."),
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stringof(this->method));
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@calls[pid, "method", this->name] = count();
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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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@calls[pid, "oalloc", stringof(this->class)] = count();
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}
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hotspot*:::class-loaded
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{
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this->class = (char *)copyin(arg0, arg1 + 1);
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this->class[arg1] = '\0';
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@calls[pid, "cload", stringof(this->class)] = count();
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}
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hotspot*:::thread-start
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{
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this->thread = (char *)copyin(arg0, arg1 + 1);
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this->thread[arg1] = '\0';
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@calls[pid, "thread", stringof(this->thread)] = count();
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}
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hotspot*:::method-compile-begin
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{
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this->class = (char *)copyin(arg0, arg1 + 1);
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this->class[arg1] = '\0';
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this->method = (char *)copyin(arg2, arg3 + 1);
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this->method[arg3] = '\0';
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this->name = strjoin(strjoin(stringof(this->class), "."),
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stringof(this->method));
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@calls[pid, "mcompile", this->name] = count();
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}
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hotspot*:::compiled-method-load
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{
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this->class = (char *)copyin(arg0, arg1 + 1);
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this->class[arg1] = '\0';
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this->method = (char *)copyin(arg2, arg3 + 1);
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this->method[arg3] = '\0';
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this->name = strjoin(strjoin(stringof(this->class), "."),
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stringof(this->method));
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@calls[pid, "mload", this->name] = count();
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}
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dtrace:::END
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{
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printf(" %6s %-8s %-52s %8s\n", "PID", "TYPE", "NAME", "COUNT");
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printa(" %6d %-8s %-52s %@8d\n", @calls);
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}
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