1#!/usr/sbin/dtrace -Zs
2/*
3 * js_flowtime.d - JavaScript function flow with delta times using DTrace.
4 *                 Written for the JavaScript DTrace provider.
5 *
6 * $Id: js_flowtime.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_flowtime.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 *		DELTA(us)	Elapsed time from previous line to this line
18 *		FUNC		Function name
19 *
20 * LEGEND:
21 *		->		function entry
22 *		<-		function return
23 *
24 * Filename and function names are printed if available.
25 *
26 * WARNING: Watch the first column carefully, it prints the CPU-id. If it
27 * changes, then it is very likely that the output has been shuffled.
28 *
29 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
30 *
31 * CDDL HEADER START
32 *
33 *  The contents of this file are subject to the terms of the
34 *  Common Development and Distribution License, Version 1.0 only
35 *  (the "License").  You may not use this file except in compliance
36 *  with the License.
37 *
38 *  You can obtain a copy of the license at Docs/cddl1.txt
39 *  or http://www.opensolaris.org/os/licensing.
40 *  See the License for the specific language governing permissions
41 *  and limitations under the License.
42 *
43 * CDDL HEADER END
44 *
45 * 09-Sep-2007	Brendan Gregg	Created this.
46 */
47
48#pragma D option quiet
49#pragma D option switchrate=10
50
51self int depth;
52
53dtrace:::BEGIN
54{
55	printf("%3s %-16s %-18s %9s -- %s\n", "C", "TIME(us)", "FILE",
56	    "DELTA(us)", "FUNC");
57}
58
59javascript*:::function-entry,
60javascript*:::function-return
61/self->last == 0/
62{
63	self->last = timestamp;
64}
65
66javascript*:::function-entry
67{
68	this->delta = (timestamp - self->last) / 1000;
69	printf("%3d %-16d %-18s %9d %*s-> %s\n", cpu, timestamp / 1000,
70	    basename(copyinstr(arg0)), this->delta, self->depth * 2, "",
71	    copyinstr(arg2));
72	self->depth++;
73	self->last = timestamp;
74}
75
76javascript*:::function-return
77{
78	this->delta = (timestamp - self->last) / 1000;
79	self->depth -= self->depth > 0 ? 1 : 0;
80	printf("%3d %-16d %-18s %9d %*s<- %s\n", cpu, timestamp / 1000,
81	    basename(copyinstr(arg0)), this->delta, self->depth * 2, "",
82	    copyinstr(arg2));
83	self->last = timestamp;
84}
85