1235368Sgnn#!/usr/sbin/dtrace -Zs
2/*
3 * js_flow.d - snoop JavaScript execution showing function flow using DTrace.
4 *             Written for the JavaScript DTrace provider.
5 *
6 * $Id: js_flow.d 63 2007-10-04 04:34:38Z brendan $
7 *
8 * This traces activity from all browsers on the system that are running
9 * with JavaScript provider support.
10 *
11 * USAGE: js_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 function belongs to
17 *		FUNC		Function name
18 *
19 * LEGEND:
20 *		->		function entry
21 *		<-		function return
22 *
23 * Filename and function 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", "FUNC");
55}
56
57javascript*:::function-entry
58{
59	printf("%3d %-16d %-22s %*s-> %s\n", cpu, timestamp / 1000,
60	    basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg2));
61	self->depth++;
62}
63
64javascript*:::function-return
65{
66	self->depth -= self->depth > 0 ? 1 : 0;
67	printf("%3d %-16d %-22s %*s<- %s\n", cpu, timestamp / 1000,
68	    basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg2));
69}
70