1235368Sgnn#!/usr/sbin/dtrace -Zs
2/*
3 * rb_malloc.d - Ruby operations and libc malloc statistics.
4 *               Written for the Ruby DTrace provider.
5 *
6 * $Id: rb_malloc.d 20 2007-09-12 09:28:22Z brendan $
7 *
8 * WARNING: This script is not 100% accurate; This prints libc malloc() byte
9 * distributions by "recent" Ruby operation, which we hope will be usually
10 * relevant. This is an experimental script that may be improved over time.
11 *
12 * USAGE: rb_malloc.d { -p PID | -c cmd }	# hit Ctrl-C to end
13 *
14 * FIELDS:
15 *		1		Filename of the Ruby program
16 *		2		Type of operation (method/objnew/startup)
17 *		3		Name of operation
18 *
19 * Filename and method names are printed if available.
20 *
21 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
22 *
23 * CDDL HEADER START
24 *
25 *  The contents of this file are subject to the terms of the
26 *  Common Development and Distribution License, Version 1.0 only
27 *  (the "License").  You may not use this file except in compliance
28 *  with the License.
29 *
30 *  You can obtain a copy of the license at Docs/cddl1.txt
31 *  or http://www.opensolaris.org/os/licensing.
32 *  See the License for the specific language governing permissions
33 *  and limitations under the License.
34 *
35 * CDDL HEADER END
36 *
37 * 09-Sep-2007	Brendan Gregg	Created this.
38 */
39
40#pragma D option quiet
41
42self string filename;
43
44dtrace:::BEGIN
45{
46	printf("Tracing... Hit Ctrl-C to end.\n");
47}
48
49ruby$target:::function-entry
50{
51	self->file = basename(copyinstr(arg2));
52	self->type = "method";
53	self->name = strjoin(strjoin(copyinstr(arg0), "::"), copyinstr(arg1));
54}
55
56ruby$target:::object-create-start
57{
58	self->file = basename(copyinstr(arg1));
59	self->type = "objnew";
60	self->name = copyinstr(arg0);
61}
62
63pid$target:libc:malloc:entry
64/self->file != NULL/
65{
66	@mallocs[self->file, self->type, self->name] = quantize(arg0);
67}
68
69pid$target:libc:malloc:entry
70/self->file == NULL/
71{
72	@mallocs["ruby", "startup", "-"] = quantize(arg0);
73}
74
75
76dtrace:::END
77{
78	printf("Ruby malloc byte distributions by recent Ruby operation,\n");
79	printa("   %s, %s, %s %@d\n", @mallocs);
80}
81