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 /* 28 * ASSERTION: 29 * Can call discard on an already discarded buffer. 30 * 31 * SECTION: Speculative Tracing/Discarding a Speculation; 32 * Options and Tunables/cleanrate 33 * 34 */ 35 #pragma D option quiet 36 #pragma D option cleanrate=3000hz 37 38 BEGIN 39 { 40 self->i = 0; 41 self->discard1 = 0; 42 self->discard2 = 0; 43 var1 = speculation(); 44 printf("Speculation ID: %d\n", var1); 45 } 46 47 BEGIN 48 /var1/ 49 { 50 speculate(var1); 51 printf("This statement and the following are speculative!!\n"); 52 printf("Speculating on id: %d\n", var1); 53 self->i++; 54 } 55 56 BEGIN 57 /(self->i)/ 58 { 59 discard(var1); 60 self->discard1++; 61 discard(var1); 62 self->discard2++; 63 } 64 65 BEGIN 66 /(self->discard2) && (self->discard1)/ 67 { 68 printf("Discarded a discarded buffer\n"); 69 exit(0); 70 } 71 72 73 BEGIN 74 /(!self->discard2) || (!self->discard1)/ 75 { 76 printf("Couldnt discard a discarded buffer\n"); 77 exit(1); 78 } 79 80 ERROR 81 { 82 exit(1); 83 } 84