1235368Sgnn#!/usr/sbin/dtrace -Zs 2235368Sgnn/* 3235368Sgnn * pl_malloc.d - Perl libc malloc analysis. 4235368Sgnn * Written for the Perl DTrace provider. 5235368Sgnn * 6235368Sgnn * $Id: pl_malloc.d 19 2007-09-12 07:47:59Z brendan $ 7235368Sgnn * 8235368Sgnn * This is an expiremental script to identify who is calling malloc() for 9235368Sgnn * memory allocation, and to print distribution plots of the requested bytes. 10235368Sgnn * If a malloc() occured while in a Perl subroutine, then that subroutine is 11235368Sgnn * identified as responsible; else the caller of malloc() is identified as 12235368Sgnn * responsible - which will be a function from the Perl engine. 13235368Sgnn * 14235368Sgnn * USAGE: pl_malloc.d { -p PID | -c cmd } # hit Ctrl-C to end 15235368Sgnn * 16235368Sgnn * Filename and subroutine names are printed if available. 17235368Sgnn * 18235368Sgnn * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 19235368Sgnn * 20235368Sgnn * CDDL HEADER START 21235368Sgnn * 22235368Sgnn * The contents of this file are subject to the terms of the 23235368Sgnn * Common Development and Distribution License, Version 1.0 only 24235368Sgnn * (the "License"). You may not use this file except in compliance 25235368Sgnn * with the License. 26235368Sgnn * 27235368Sgnn * You can obtain a copy of the license at Docs/cddl1.txt 28235368Sgnn * or http://www.opensolaris.org/os/licensing. 29235368Sgnn * See the License for the specific language governing permissions 30235368Sgnn * and limitations under the License. 31235368Sgnn * 32235368Sgnn * CDDL HEADER END 33235368Sgnn * 34235368Sgnn * 09-Sep-2007 Brendan Gregg Created this. 35235368Sgnn */ 36235368Sgnn 37235368Sgnn#pragma D option quiet 38235368Sgnn 39235368Sgnndtrace:::BEGIN 40235368Sgnn{ 41235368Sgnn printf("Tracing... Hit Ctrl-C to end.\n"); 42235368Sgnn} 43235368Sgnn 44235368Sgnnperl$target:::sub-entry 45235368Sgnn{ 46235368Sgnn self->file = basename(copyinstr(arg1)); 47235368Sgnn self->name = copyinstr(arg0); 48235368Sgnn} 49235368Sgnn 50235368Sgnnperl$target:::sub-return 51235368Sgnn{ 52235368Sgnn self->file = 0; 53235368Sgnn self->name = 0; 54235368Sgnn} 55235368Sgnn 56235368Sgnnpid$target:libc:malloc:entry 57235368Sgnn/self->file != NULL/ 58235368Sgnn{ 59235368Sgnn @malloc_sub_size[self->file, self->name] = sum(arg0); 60235368Sgnn @malloc_sub_dist[self->file, self->name] = quantize(arg0); 61235368Sgnn} 62235368Sgnn 63235368Sgnnpid$target:libc:malloc:entry 64235368Sgnn/self->name == NULL/ 65235368Sgnn{ 66235368Sgnn @malloc_lib_size[usym(ucaller)] = sum(arg0); 67235368Sgnn @malloc_lib_dist[usym(ucaller)] = quantize(arg0); 68235368Sgnn} 69235368Sgnn 70235368Sgnn 71235368Sgnndtrace:::END 72235368Sgnn{ 73235368Sgnn printf("\nPerl malloc byte distributions by engine caller,\n\n"); 74235368Sgnn printa(" %A, total bytes = %@d %@d\n", @malloc_lib_size, 75235368Sgnn @malloc_lib_dist); 76235368Sgnn 77235368Sgnn printf("\nPerl malloc byte distributions by Perl file and "); 78235368Sgnn printf("subroutine,\n\n"); 79235368Sgnn printa(" %s, %s, bytes total = %@d %@d\n", @malloc_sub_size, 80235368Sgnn @malloc_sub_dist); 81235368Sgnn} 82