1 #!/usr/sbin/dtrace -ws 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* 29 * ASSERTION: 30 * Destructive actions may never be speculative. 31 * 32 * SECTION: Speculative Tracing/Using a Speculation 33 * SECTION: dtrace(8) Utility/ -w option 34 * 35 */ 36 #pragma D option quiet 37 38 BEGIN 39 { 40 i = 0; 41 } 42 43 profile:::tick-1sec 44 /i < 1/ 45 { 46 var = speculation(); 47 speculate(var); 48 printf("Speculation ID: %d", var); 49 panic(); 50 i++; 51 } 52 53 profile:::tick-1sec 54 /1 == i/ 55 { 56 exit(0); 57 } 58 59 ERROR 60 { 61 exit(0); 62 } 63 64 END 65 { 66 exit(0); 67 } 68