libmtmalloc/tests/align.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
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/*
 * Copyright (c) 1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>

/*
 * This file tests for 8 bytes alignment on all allocations.
 *
 * cc -O -o align align.c -lmtmalloc
 */

#define N 100   /* big enough to hold results */

main(int argc, char ** argv)
{
    int i = 0;
    char *bar[N];

    while (i < 20) {
        bar[i] = malloc(1<<i);
        if ((uintptr_t)bar[i] & 7) {
            fprintf(stderr, "Address %p is not 8 byte aligned\n",
                bar[i]);
            fprintf(stderr, "Allocation size %d\n", 1<<i);
        }
        i++;
    }

    i = 0;
    while (i < 20) {
        free(bar[i]);
        i++;
    }
}