usr/src/cmd/dtrace/test/tst/common/offsetof/tst.OffsetofArith.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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 /*
  29  * ASSERTION: offsetof can be used anywhere in a D program that an integer
  30  * constant can be used.
  31  *
  32  * SECTION: Structs and Unions/Member Sizes and Offsets
  33  *
  34  * NOTES:
  35  *
  36  */
  37
  38 #pragma D option quiet
  39
  40 typedef struct record {
  41         char c;
  42         int x;
  43         int y;
  44 } record_t;
  45
  46 BEGIN
  47 {
  48
  49         add = offsetof(record_t, c) + offsetof(record_t, x) +
  50             offsetof(record_t, y);
  51         sub = offsetof(record_t, y) - offsetof(record_t, x);
  52         mul = offsetof(record_t, x) * offsetof(record_t, c);
  53         div = offsetof(record_t, y) / offsetof(record_t, x);
  54
  55         printf("offsetof(record_t, c) = %d\n", offsetof(record_t, c));
  56         printf("offsetof(record_t, x) = %d\n", offsetof(record_t, x));
  57         printf("offsetof(record_t, y) = %d\n", offsetof(record_t, y));
  58
  59         printf("Addition of offsets (c+x+y)= %d\n", add);
  60         printf("Subtraction of offsets (y-x)= %d\n", sub);
  61         printf("Multiplication of offsets (x*c) = %d\n", mul);
  62         printf("Division of offsets (y/x) = %d\n", div);
  63
  64         exit(0);
  65 }
  66
  67 END
  68 /(8 != offsetof(record_t, y)) || (4 != offsetof(record_t, x)) ||
  69     (0 != offsetof(record_t, c)) || (12 != add)  || (4 != sub) || (0 != mul)
  70     || (2 != div)/
  71 {
  72         exit(1);
  73 }