align.c revision 7c478bd95313f5f23a4c958a745db2134aa0324
17c478bdstevel@tonic-gate/*
27c478bdstevel@tonic-gate * CDDL HEADER START
37c478bdstevel@tonic-gate *
47c478bdstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bdstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bdstevel@tonic-gate * (the "License").  You may not use this file except in compliance
77c478bdstevel@tonic-gate * with the License.
87c478bdstevel@tonic-gate *
97c478bdstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bdstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bdstevel@tonic-gate * See the License for the specific language governing permissions
127c478bdstevel@tonic-gate * and limitations under the License.
137c478bdstevel@tonic-gate *
147c478bdstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bdstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bdstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bdstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bdstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bdstevel@tonic-gate *
207c478bdstevel@tonic-gate * CDDL HEADER END
217c478bdstevel@tonic-gate */
227c478bdstevel@tonic-gate/*
237c478bdstevel@tonic-gate * Copyright (c) 1998 by Sun Microsystems, Inc.
247c478bdstevel@tonic-gate * All rights reserved.
257c478bdstevel@tonic-gate */
267c478bdstevel@tonic-gate
277c478bdstevel@tonic-gate#pragma	ident	"%Z%%M%	%I%	%E% SMI"
287c478bdstevel@tonic-gate
297c478bdstevel@tonic-gate#include <stdio.h>
307c478bdstevel@tonic-gate#include <stdlib.h>
317c478bdstevel@tonic-gate#include <sys/types.h>
327c478bdstevel@tonic-gate
337c478bdstevel@tonic-gate/*
347c478bdstevel@tonic-gate * This file tests for 8 bytes alignment on all allocations.
357c478bdstevel@tonic-gate *
367c478bdstevel@tonic-gate * cc -O -o align align.c -lmtmalloc
377c478bdstevel@tonic-gate */
387c478bdstevel@tonic-gate
397c478bdstevel@tonic-gate#define	N 100	/* big enough to hold results */
407c478bdstevel@tonic-gate
417c478bdstevel@tonic-gatemain(int argc, char ** argv)
427c478bdstevel@tonic-gate{
437c478bdstevel@tonic-gate	int i = 0;
447c478bdstevel@tonic-gate	char *bar[N];
457c478bdstevel@tonic-gate
467c478bdstevel@tonic-gate	while (i < 20) {
477c478bdstevel@tonic-gate		bar[i] = malloc(1<<i);
487c478bdstevel@tonic-gate		if ((uintptr_t)bar[i] & 7) {
497c478bdstevel@tonic-gate			fprintf(stderr, "Address %p is not 8 byte aligned\n",
507c478bdstevel@tonic-gate				bar[i]);
517c478bdstevel@tonic-gate			fprintf(stderr, "Allocation size %d\n", 1<<i);
527c478bdstevel@tonic-gate		}
537c478bdstevel@tonic-gate		i++;
547c478bdstevel@tonic-gate	}
557c478bdstevel@tonic-gate
567c478bdstevel@tonic-gate	i = 0;
577c478bdstevel@tonic-gate	while (i < 20) {
587c478bdstevel@tonic-gate		free(bar[i]);
597c478bdstevel@tonic-gate		i++;
607c478bdstevel@tonic-gate	}
617c478bdstevel@tonic-gate}
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