usr/src/cmd/dtrace/test/tst/common/pointers/tst.IntegerArithmetic1.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 2006 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:
  31  * Integer arithmetic can be performed on pointers by casting to uintptr_t.
  32  *
  33  * SECTION: Pointers and Arrays/Generic Pointers
  34  *
  35  * NOTES:
  36  *
  37  */
  38
  39 #pragma D option quiet
  40
  41 int array[3];
  42 uintptr_t uptr;
  43 int *p;
  44 int *q;
  45 int *r;
  46
  47 BEGIN
  48 {
  49         array[0] = 20;
  50         array[1] = 40;
  51         array[2] = 80;
  52
  53         uptr = (uintptr_t) &array[0];
  54
  55         p = (int *) (uptr);
  56         q = (int *) (uptr + 4);
  57         r = (int *) (uptr + 8);
  58
  59         printf("array[0]: %d\t*p: %d\n", array[0], *p);
  60         printf("array[1]: %d\t*q: %d\n", array[1], *q);
  61         printf("array[2]: %d\t*r: %d\n", array[2], *r);
  62
  63         exit(0);
  64 }
  65
  66 END
  67 /(20 != *p) || (40 != *q) || (80 != *r)/
  68 {
  69         printf("Error");
  70         exit(1);
  71 }
  72