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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright (c) 2012 by Delphix. All rights reserved. 29 */ 30 31 /* 32 * ASSERTION: 33 * Using integer arithmetic providing a non-aligned memory address will throw 34 * a runtime error. 35 * 36 * SECTION: Pointers and Arrays/Generic Pointers 37 */ 38 39 #pragma D option quiet 40 41 #if defined(__i386) || defined(__amd64) 42 #define __x86 1 43 #endif 44 45 int array[2]; 46 char *ptr; 47 int *p; 48 int *q; 49 int *r; 50 51 BEGIN 52 { 53 array[0] = 0x12345678; 54 array[1] = 0xabcdefff; 55 56 ptr = (char *) &array[0]; 57 58 p = (int *) (ptr); 59 q = (int *) (ptr + 2); 60 r = (int *) (ptr + 3); 61 62 printf("*p: 0x%x\n", *p); 63 printf("*q: 0x%x\n", *q); 64 printf("*r: 0x%x\n", *r); 65 66 /* 67 * On x86, the above unaligned memory accesses are allowed and should 68 * not result in the ERROR probe firing. 69 */ 70 #ifdef __x86 71 exit(1); 72 #else 73 exit(0); 74 #endif 75 } 76 77 ERROR 78 { 79 #ifdef __x86 80 exit(0); 81 #else 82 exit(1); 83 #endif 84 } 85