usr/src/cmd/dtrace/test/tst/common/speculation/tst.DiscardWithZero.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: An Id of zero though invalid may be passed to speculate(),
  31  * commit() and discard() without any ill effects.
  32  *
  33  * SECTION: Speculative Tracing/Creating a Speculation;
  34  *      Options and Tunables/cleanrate
  35  */
  36 #pragma D option quiet
  37 #pragma D option cleanrate=4000hz
  38
  39 BEGIN
  40 {
  41         self->discardFlag = 0;
  42         self->var1 = speculation();
  43         printf("Speculative buffer ID: %d\n", self->var1);
  44         self->spec = speculation();
  45         printf("Speculative buffer ID: %d\n", self->spec);
  46 }
  47
  48 BEGIN
  49 /0 == self->spec/
  50 {
  51         discard(self->spec);
  52         self->discardFlag++;
  53 }
  54
  55 BEGIN
  56 /0 < self->discardFlag/
  57 {
  58         printf("discard(), self->discardFlag = %d\n", self->discardFlag);
  59         exit(0);
  60 }
  61
  62 BEGIN
  63 /0 == self->discardFlag/
  64 {
  65         printf("discard(), self->discardFlag = %d\n", self->discardFlag);
  66         exit(1);
  67 }