1 #!/usr/sbin/dtrace -ws
2 /*
3  * CDDL HEADER START
4  *
5  * The contents of this file are subject to the terms of the
6  * Common Development and Distribution License (the "License").
7  * You may not use this file except in compliance with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 
23 /*
24  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25  * Use is subject to license terms.
26  */
27 
28 #pragma ident	"%Z%%M%	%I%	%E% SMI"
29 
30 /*
31  * ASSERTION:
32  * Destructive actions may never be speculative.
33  *
34  * SECTION: Speculative Tracing/Using a Speculation
35  * SECTION: dtrace(1M) Utility/ -w option
36  *
37  */
38 #pragma D option quiet
39 
40 BEGIN
41 {
42 	i = 0;
43 }
44 
45 profile:::tick-1sec
46 /i < 1/
47 {
48 	var = speculation();
49 	speculate(var);
50 	printf("Speculation ID: %d", var);
51 	panic();
52 	i++;
53 }
54 
55 profile:::tick-1sec
56 /1 == i/
57 {
58 	exit(0);
59 }
60 
61 ERROR
62 {
63 	exit(0);
64 }
65 
66 END
67 {
68 	exit(0);
69 }
70