usr/src/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