1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*
28  * ASSERTION:
29  * Can call discard on an already discarded buffer.
30  *
31  * SECTION: Speculative Tracing/Discarding a Speculation;
32  *	Options and Tunables/cleanrate
33  *
34  */
35 #pragma D option quiet
36 #pragma D option cleanrate=3000hz
37 
38 BEGIN
39 {
40 	self->i = 0;
41 	self->discard1 = 0;
42 	self->discard2 = 0;
43 	var1 = speculation();
44 	printf("Speculation ID: %d\n", var1);
45 }
46 
47 BEGIN
48 /var1/
49 {
50 	speculate(var1);
51 	printf("This statement and the following are speculative!!\n");
52 	printf("Speculating on id: %d\n", var1);
53 	self->i++;
54 }
55 
56 BEGIN
57 /(self->i)/
58 {
59 	discard(var1);
60 	self->discard1++;
61 	discard(var1);
62 	self->discard2++;
63 }
64 
65 BEGIN
66 /(self->discard2) && (self->discard1)/
67 {
68 	printf("Discarded a discarded buffer\n");
69 	exit(0);
70 }
71 
72 
73 BEGIN
74 /(!self->discard2) || (!self->discard1)/
75 {
76 	printf("Couldnt discard a discarded buffer\n");
77 	exit(1);
78 }
79 
80 ERROR
81 {
82 	exit(1);
83 }
84