1235368Sgnn#!/usr/sbin/dtrace -Zs
2/*
3 * rb_flow.d - snoop Ruby execution showing method flow using DTrace.
4 *             Written for the Ruby DTrace provider.
5 *
6 * $Id: rb_flow.d 41 2007-09-17 02:20:10Z brendan $
7 *
8 * This traces activity from all Ruby programs on the system that are
9 * running with Ruby provider support.
10 *
11 * USAGE: rb_flow.d 		# hit Ctrl-C to end
12 *
13 * FIELDS:
14 *		C		CPU-id
15 *		TIME(us)	Time since boot, us
16 *		FILE		Filename that this method belongs to
17 *		CLASS::METHOD	Ruby classname and method
18 *
19 * LEGEND:
20 *		->		method entry
21 *		<-		method return
22 *
23 * Filename and method names are printed if available.
24 *
25 * WARNING: Watch the first column carefully, it prints the CPU-id. If it
26 * changes, then it is very likely that the output has been shuffled.
27 *
28 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
29 *
30 * CDDL HEADER START
31 *
32 *  The contents of this file are subject to the terms of the
33 *  Common Development and Distribution License, Version 1.0 only
34 *  (the "License").  You may not use this file except in compliance
35 *  with the License.
36 *
37 *  You can obtain a copy of the license at Docs/cddl1.txt
38 *  or http://www.opensolaris.org/os/licensing.
39 *  See the License for the specific language governing permissions
40 *  and limitations under the License.
41 *
42 * CDDL HEADER END
43 *
44 * 09-Sep-2007	Brendan Gregg	Created this.
45 */
46
47#pragma D option quiet
48#pragma D option switchrate=10
49
50self int depth;
51
52dtrace:::BEGIN
53{
54	printf("%3s %-16s %-22s -- %s\n", "C", "TIME(us)", "FILE",
55	    "CLASS::METHOD");
56}
57
58ruby*:::function-entry
59{
60	printf("%3d %-16d %-22s %*s-> %s::%s\n", cpu, timestamp / 1000,
61	    basename(copyinstr(arg2)), self->depth * 2, "", copyinstr(arg0),
62	    copyinstr(arg1));
63	self->depth++;
64}
65
66ruby*:::function-return
67{
68	self->depth -= self->depth > 0 ? 1 : 0;
69	printf("%3d %-16d %-22s %*s<- %s::%s\n", cpu, timestamp / 1000,
70	    basename(copyinstr(arg2)), self->depth * 2, "", copyinstr(arg0),
71	    copyinstr(arg1));
72}
73