1#!/usr/sbin/dtrace -Zs
2/*
3 * js_flowinfo.d - JavaScript function flow with info using DTrace.
4 *                 Written for the JavaScript DTrace provider.
5 *
6 * $Id: js_flowinfo.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_flowinfo.d 	# hit Ctrl-C to end
12 *
13 * FIELDS:
14 *		C		CPU-id
15 *		PID		Process ID
16 *		DELTA(us)	Elapsed time from previous line to this line
17 *		FILE		Filename of the JavScript program
18 *		LINE		Line number of filename
19 *		TYPE		Type of call (func)
20 *		FUNC		Function name
21 *
22 * LEGEND:
23 *		->		function entry
24 *		<-		function return
25 *
26 * Filename and function names are printed if available.
27 *
28 * WARNING: Watch the first column carefully, it prints the CPU-id. If it
29 * changes, then it is very likely that the output has been shuffled.
30 *
31 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
32 *
33 * CDDL HEADER START
34 *
35 *  The contents of this file are subject to the terms of the
36 *  Common Development and Distribution License, Version 1.0 only
37 *  (the "License").  You may not use this file except in compliance
38 *  with the License.
39 *
40 *  You can obtain a copy of the license at Docs/cddl1.txt
41 *  or http://www.opensolaris.org/os/licensing.
42 *  See the License for the specific language governing permissions
43 *  and limitations under the License.
44 *
45 * CDDL HEADER END
46 *
47 * 09-Sep-2007	Brendan Gregg	Created this.
48 */
49
50#pragma D option quiet
51#pragma D option switchrate=10
52
53self int depth;
54
55dtrace:::BEGIN
56{
57	printf("%3s %6s %10s  %16s:%-4s %-8s -- %s\n", "C", "PID", "DELTA(us)",
58	    "FILE", "LINE", "TYPE", "FUNC");
59}
60
61javascript*:::function-info,
62javascript*:::function-return
63/self->last == 0/
64{
65	self->last = timestamp;
66}
67
68javascript*:::function-info
69{
70	this->delta = (timestamp - self->last) / 1000;
71	printf("%3d %6d %10d  %16s:%-4d %-8s %*s-> %s\n", cpu, pid,
72	    this->delta, basename(copyinstr(arg4)), arg5, "func",
73	    self->depth * 2, "", copyinstr(arg2));
74	self->depth++;
75	self->last = timestamp;
76}
77
78javascript*:::function-return
79{
80	this->delta = (timestamp - self->last) / 1000;
81	self->depth -= self->depth > 0 ? 1 : 0;
82	printf("%3d %6d %10d  %16s:-    %-8s %*s<- %s\n", cpu, pid,
83	    this->delta, basename(copyinstr(arg0)), "func", self->depth * 2,
84	    "", copyinstr(arg2));
85	self->last = timestamp;
86}
87