usr/src/lib/libmtmalloc/tests/align.c

   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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * 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  * Copyright (c) 1998 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <sys/types.h>
  32
  33 /*
  34  * This file tests for 8 bytes alignment on all allocations.
  35  *
  36  * cc -O -o align align.c -lmtmalloc
  37  */
  38
  39 #define N 100   /* big enough to hold results */
  40
  41 main(int argc, char ** argv)
  42 {
  43         int i = 0;
  44         char *bar[N];
  45
  46         while (i < 20) {
  47                 bar[i] = malloc(1<<i);
  48                 if ((uintptr_t)bar[i] & 7) {
  49                         fprintf(stderr, "Address %p is not 8 byte aligned\n",
  50                                 bar[i]);
  51                         fprintf(stderr, "Allocation size %d\n", 1<<i);
  52                 }
  53                 i++;
  54         }
  55
  56         i = 0;
  57         while (i < 20) {
  58                 free(bar[i]);
  59                 i++;
  60         }
  61 }