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[FreeBSD/stable/10.git] / cddl / contrib / opensolaris / cmd / dtrace / test / tst / common / docsExamples / specopen.d
1 #!/usr/sbin/dtrace -Fs
2
3
4 /*
5  * CDDL HEADER START
6  *
7  * The contents of this file are subject to the terms of the
8  * Common Development and Distribution License (the "License").
9  * You may not use this file except in compliance with the License.
10  *
11  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
12  * or http://www.opensolaris.org/os/licensing.
13  * See the License for the specific language governing permissions
14  * and limitations under the License.
15  *
16  * When distributing Covered Code, include this CDDL HEADER in each
17  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
18  * If applicable, add the following below this CDDL HEADER, with the
19  * fields enclosed by brackets "[]" replaced with your own identifying
20  * information: Portions Copyright [yyyy] [name of copyright owner]
21  *
22  * CDDL HEADER END
23  */
24
25 /*
26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  */
29
30 #pragma ident   "%Z%%M% %I%     %E% SMI"
31
32 /*
33  * ASSERTION:
34  *      Verify doc example 13-1
35  *
36  * SECTION:
37  *      DocExamples/specopen
38  */
39
40 syscall::open:entry,
41 syscall::open64:entry
42 {
43         self->spec = speculation();
44         speculate(self->spec);
45
46         printf("%s", stringof(copyinstr(arg0)));
47 }
48
49 fbt:::
50 /self->spec/
51 {
52         speculate(self->spec);
53 }
54
55 syscall::open:return,
56 syscall::open64:return
57 /self->spec/
58 {
59         speculate(self->spec);
60         trace(errno);
61 }
62
63 syscall::open:return,
64 syscall::open64:return
65 /self->spec && errno != 0/
66 {
67         commit(self->spec);
68         self->spec = 0;
69 }
70
71 syscall::open:return,
72 syscall::open64:return
73 /self->spec && errno == 0/
74 {
75         discard(self->spec);
76         self->spec = 0;
77 }
78
79