82 lines
2.2 KiB
D
Executable File
82 lines
2.2 KiB
D
Executable File
#!/usr/sbin/dtrace -Zs
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/*
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* pl_malloc.d - Perl libc malloc analysis.
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* Written for the Perl DTrace provider.
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*
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* $Id: pl_malloc.d,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $
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*
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* This is an expiremental script to identify who is calling malloc() for
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* memory allocation, and to print distribution plots of the requested bytes.
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* If a malloc() occured while in a Perl subroutine, then that subroutine is
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* identified as responsible; else the caller of malloc() is identified as
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* responsible - which will be a function from the Perl engine.
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*
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* USAGE: pl_malloc.d { -p PID | -c cmd } # hit Ctrl-C to end
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*
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* Filename and subroutine names are printed if available.
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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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perl$target:::sub-entry
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{
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self->file = basename(copyinstr(arg1));
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self->name = copyinstr(arg0);
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}
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perl$target:::sub-return
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{
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self->file = 0;
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self->name = 0;
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}
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pid$target:libc:malloc:entry
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/self->file != NULL/
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{
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@malloc_sub_size[self->file, self->name] = sum(arg0);
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@malloc_sub_dist[self->file, self->name] = quantize(arg0);
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}
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pid$target:libc:malloc:entry
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/self->name == NULL/
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{
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@malloc_lib_size[usym(ucaller)] = sum(arg0);
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@malloc_lib_dist[usym(ucaller)] = quantize(arg0);
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}
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dtrace:::END
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{
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printf("\nPerl malloc byte distributions by engine caller,\n\n");
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printa(" %A, total bytes = %@d %@d\n", @malloc_lib_size,
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@malloc_lib_dist);
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printf("\nPerl malloc byte distributions by Perl file and ");
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printf("subroutine,\n\n");
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printa(" %s, %s, bytes total = %@d %@d\n", @malloc_sub_size,
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@malloc_sub_dist);
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}
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