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 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 /* 31 * ASSERTION: 32 * Destructive actions may never be speculative. 33 * 34 * SECTION: Speculative Tracing/Using a Speculation 35 * SECTION: dtrace(1M) Utility/ -w option 36 */ 37 #pragma D option quiet 38 39 BEGIN 40 { 41 i = 0; 42 } 43 44 profile:::tick-1sec 45 /i < 1/ 46 { 47 var = speculation(); 48 speculate(var); 49 printf("Speculation ID: %d", var); 50 raise(9); 51 i++; 52 } 53 54 profile:::tick-1sec 55 /1 == i/ 56 { 57 exit(0); 58 } 59 60 ERROR 61 { 62 exit(0); 63 } 64 65 END 66 { 67 exit(0); 68 } 69