183610Ssobomax#!/usr/sbin/dtrace -Zs 283610Ssobomax/* 383610Ssobomax * php_malloc.d - PHP libc malloc analysis. 483610Ssobomax * Written for the PHP DTrace provider. 583610Ssobomax * 683610Ssobomax * $Id: php_malloc.d 53 2007-09-24 04:58:38Z brendan $ 783610Ssobomax * 883610Ssobomax * This is an expiremental script to identify who is calling malloc() for 983610Ssobomax * memory allocation, and to print distribution plots of the requested bytes. 1083610Ssobomax * If a malloc() occured while in a PHP function, then that function is 1183610Ssobomax * identified as responsible; else the caller of malloc() is identified as 1283610Ssobomax * responsible - which will be a function from the PHP engine. 1383610Ssobomax * 1483610Ssobomax * USAGE: php_malloc.d { -p PID | -c cmd } # hit Ctrl-C to end 1583610Ssobomax * 1683610Ssobomax * Filename and function names are printed if available. 1783610Ssobomax * 1883610Ssobomax * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 1983610Ssobomax * 2083610Ssobomax * CDDL HEADER START 2183610Ssobomax * 2283610Ssobomax * The contents of this file are subject to the terms of the 2383610Ssobomax * Common Development and Distribution License, Version 1.0 only 2483610Ssobomax * (the "License"). You may not use this file except in compliance 2583610Ssobomax * with the License. 2683610Ssobomax * 2783610Ssobomax * You can obtain a copy of the license at Docs/cddl1.txt 2884221Sdillon * or http://www.opensolaris.org/os/licensing. 2984221Sdillon * See the License for the specific language governing permissions 3084221Sdillon * and limitations under the License. 31174741Ssobomax * 3283610Ssobomax * CDDL HEADER END 33174741Ssobomax * 34174741Ssobomax * 09-Sep-2007 Brendan Gregg Created this. 35174741Ssobomax */ 36174741Ssobomax 37174741Ssobomax#pragma D option quiet 3883610Ssobomax 39174741Ssobomaxdtrace:::BEGIN 40174741Ssobomax{ 41174741Ssobomax printf("Tracing... Hit Ctrl-C to end.\n"); 42174741Ssobomax} 43174741Ssobomax 44174741Ssobomaxphp$target:::function-entry 45174741Ssobomax/arg0/ 46174741Ssobomax{ 47174741Ssobomax self->file = basename(copyinstr(arg1)); 48174741Ssobomax self->name = copyinstr(arg0); 4983610Ssobomax} 5083610Ssobomax 51146324Sobrienphp$target:::function-return 5283610Ssobomax{ 5383610Ssobomax self->file = 0; 5483610Ssobomax self->name = 0; 5583610Ssobomax} 5683610Ssobomax 5783610Ssobomaxpid$target:libc:malloc:entry 5883610Ssobomax/self->file != NULL/ 5983610Ssobomax{ 60174741Ssobomax @malloc_func_size[self->file, self->name] = sum(arg1); 6183610Ssobomax @malloc_func_dist[self->file, self->name] = quantize(arg1); 6283610Ssobomax} 6383610Ssobomax 6483610Ssobomaxpid$target:libc:malloc:entry 6583610Ssobomax/self->name == NULL/ 6683610Ssobomax{ 6783610Ssobomax @malloc_lib_size[usym(ucaller)] = sum(arg1); 6883610Ssobomax @malloc_lib_dist[usym(ucaller)] = quantize(arg1); 6983610Ssobomax} 70174741Ssobomax 7183610Ssobomax 7283610Ssobomaxdtrace:::END 7383610Ssobomax{ 7483610Ssobomax printf("\nPHP malloc byte distributions by engine caller,\n\n"); 7583610Ssobomax printa(" %A, total bytes = %@d %@d\n", @malloc_lib_size, 7683610Ssobomax @malloc_lib_dist); 7783610Ssobomax 7883610Ssobomax printf("\nPHP malloc byte distributions by PHP file and "); 7983610Ssobomax printf("function,\n\n"); 8083610Ssobomax printa(" %s, %s, bytes total = %@d %@d\n", @malloc_func_size, 81174741Ssobomax @malloc_func_dist); 8283610Ssobomax} 8383610Ssobomax