align.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
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
41main(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}
62