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 /*
29  * ASSERTION:
30  * Destructive actions may never be speculative.
31  *
32  * SECTION: Speculative Tracing/Using a Speculation
33  * SECTION: dtrace(8) Utility/ -w option
34  */
35 #pragma D option quiet
36 
37 string str;
38 char a[2];
39 uintptr_t addr;
40 size_t maxlen;
41 BEGIN
42 {
43 	self->i = 0;
44 	addr = (uintptr_t) &a[0];
45 	maxlen = 10;
46 	var = speculation();
47 }
48 
49 BEGIN
50 {
51 	speculate(var);
52 	printf("Speculation ID: %d", var);
53 	self->i++;
54 	copyoutstr(str, addr, maxlen);
55 }
56 
57 BEGIN
58 {
59 	printf("This test should not have compiled\n");
60 	exit(0);
61 }
62 
63 ERROR
64 {
65 	exit(0);
66 }
67