usr/src/cmd/dtrace/test/tst/common/speculation/tst.CommitAfterDiscard.d

   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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * ASSERTION:
  31  * Call to commit() on a buffer after it has been discarded is silently
  32  * ignored.
  33  *
  34  * SECTION: Speculative Tracing/Committing a Speculation;
  35  *      Options and Tunables/cleanrate
  36  *
  37  */
  38 #pragma D option quiet
  39 #pragma D option cleanrate=3000hz
  40
  41 BEGIN
  42 {
  43         self->i = 0;
  44         self->commit = 0;
  45         self->discard = 0;
  46         var1 = speculation();
  47         printf("Speculation ID: %d\n", var1);
  48 }
  49
  50 BEGIN
  51 /var1/
  52 {
  53         speculate(var1);
  54         printf("This statement and the following are speculative!!\n");
  55         printf("Speculating on id: %d\n", var1);
  56         self->i++;
  57 }
  58
  59 BEGIN
  60 /(self->i)/
  61 {
  62         discard(var1);
  63         self->discard++;
  64         commit(var1);
  65         self->commit++;
  66 }
  67
  68 BEGIN
  69 /self->commit/
  70 {
  71         printf("Commited a discarded buffer\n");
  72         exit(0);
  73 }
  74
  75
  76 BEGIN
  77 /!self->commit/
  78 {
  79         printf("Couldnt commit a discarded buffer\n");
  80         exit(1);
  81 }
  82
  83 ERROR
  84 {
  85         exit(1);
  86 }