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      1 #!/usr/sbin/dtrace -Zs
      2 /*
      3  * php_malloc.d - PHP libc malloc analysis.
      4  *                Written for the PHP DTrace provider.
      5  *
      6  * $Id: php_malloc.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
      7  *
      8  * This is an expiremental script to identify who is calling malloc() for
      9  * memory allocation, and to print distribution plots of the requested bytes.
     10  * If a malloc() occured while in a PHP function, then that function is
     11  * identified as responsible; else the caller of malloc() is identified as
     12  * responsible - which will be a function from the PHP engine.
     13  *
     14  * USAGE: php_malloc.d { -p PID | -c cmd }	# hit Ctrl-C to end
     15  *
     16  * Filename and function names are printed if available.
     17  *
     18  * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
     19  *
     20  * CDDL HEADER START
     21  *
     22  *  The contents of this file are subject to the terms of the
     23  *  Common Development and Distribution License, Version 1.0 only
     24  *  (the "License").  You may not use this file except in compliance
     25  *  with the License.
     26  *
     27  *  You can obtain a copy of the license at Docs/cddl1.txt
     28  *  or http://www.opensolaris.org/os/licensing.
     29  *  See the License for the specific language governing permissions
     30  *  and limitations under the License.
     31  *
     32  * CDDL HEADER END
     33  *
     34  * 09-Sep-2007	Brendan Gregg	Created this.
     35  */
     36 
     37 #pragma D option quiet
     38 
     39 dtrace:::BEGIN
     40 {
     41 	printf("Tracing... Hit Ctrl-C to end.\n");
     42 }
     43 
     44 php$target:::function-entry
     45 /arg0/
     46 {
     47 	self->file = basename(copyinstr(arg1));
     48 	self->name = copyinstr(arg0);
     49 }
     50 
     51 php$target:::function-return
     52 {
     53 	self->file = 0;
     54 	self->name = 0;
     55 }
     56 
     57 pid$target:libc:malloc:entry
     58 /self->file != NULL/
     59 {
     60 	@malloc_func_size[self->file, self->name] = sum(arg1);
     61 	@malloc_func_dist[self->file, self->name] = quantize(arg1);
     62 }
     63 
     64 pid$target:libc:malloc:entry
     65 /self->name == NULL/
     66 {
     67 	@malloc_lib_size[usym(ucaller)] = sum(arg1);
     68 	@malloc_lib_dist[usym(ucaller)] = quantize(arg1);
     69 }
     70 
     71 
     72 dtrace:::END
     73 {
     74 	printf("\nPHP malloc byte distributions by engine caller,\n\n");
     75 	printa("   %A, total bytes = %@d %@d\n", @malloc_lib_size,
     76 	    @malloc_lib_dist);
     77 
     78 	printf("\nPHP malloc byte distributions by PHP file and ");
     79 	printf("function,\n\n");
     80 	printa("   %s, %s, bytes total = %@d %@d\n", @malloc_func_size,
     81 	    @malloc_func_dist);
     82 }
     83