1235368Sgnn#!/usr/sbin/dtrace -Zs 2235368Sgnn/* 3235368Sgnn * php_malloc.d - PHP libc malloc analysis. 4235368Sgnn * Written for the PHP DTrace provider. 5235368Sgnn * 6235368Sgnn * $Id: php_malloc.d 53 2007-09-24 04:58:38Z 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 PHP function, then that function is 11235368Sgnn * identified as responsible; else the caller of malloc() is identified as 12235368Sgnn * responsible - which will be a function from the PHP engine. 13235368Sgnn * 14235368Sgnn * USAGE: php_malloc.d { -p PID | -c cmd } # hit Ctrl-C to end 15235368Sgnn * 16235368Sgnn * Filename and function 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 44235368Sgnnphp$target:::function-entry 45235368Sgnn/arg0/ 46235368Sgnn{ 47235368Sgnn self->file = basename(copyinstr(arg1)); 48235368Sgnn self->name = copyinstr(arg0); 49235368Sgnn} 50235368Sgnn 51235368Sgnnphp$target:::function-return 52235368Sgnn{ 53235368Sgnn self->file = 0; 54235368Sgnn self->name = 0; 55235368Sgnn} 56235368Sgnn 57235368Sgnnpid$target:libc:malloc:entry 58235368Sgnn/self->file != NULL/ 59235368Sgnn{ 60235368Sgnn @malloc_func_size[self->file, self->name] = sum(arg1); 61235368Sgnn @malloc_func_dist[self->file, self->name] = quantize(arg1); 62235368Sgnn} 63235368Sgnn 64235368Sgnnpid$target:libc:malloc:entry 65235368Sgnn/self->name == NULL/ 66235368Sgnn{ 67235368Sgnn @malloc_lib_size[usym(ucaller)] = sum(arg1); 68235368Sgnn @malloc_lib_dist[usym(ucaller)] = quantize(arg1); 69235368Sgnn} 70235368Sgnn 71235368Sgnn 72235368Sgnndtrace:::END 73235368Sgnn{ 74235368Sgnn printf("\nPHP malloc byte distributions by engine caller,\n\n"); 75235368Sgnn printa(" %A, total bytes = %@d %@d\n", @malloc_lib_size, 76235368Sgnn @malloc_lib_dist); 77235368Sgnn 78235368Sgnn printf("\nPHP malloc byte distributions by PHP file and "); 79235368Sgnn printf("function,\n\n"); 80235368Sgnn printa(" %s, %s, bytes total = %@d %@d\n", @malloc_func_size, 81235368Sgnn @malloc_func_dist); 82235368Sgnn} 83