/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdio.h>
#include <stdlib.h>
/*
* realloc() optimization for Small sized caches.
* If a malloc'ed buffer can satisfy a realloc() request
* as well, it should return the same buffer.
*
* cc -O -o reallocs reallocs.c -lmtmalloc
*/
#define MAX_CACHE_SZ 65536
int
main()
{
void *p, *q;
size_t size;
for (size = 1; size <= MAX_CACHE_SZ; size++) {
p = malloc(size);
q = realloc(p, size);
if (p != q)
(void) fprintf(stderr, "size: %d, p: 0x%p, q: 0x%p\n",
size, p, q);
free(q);
}
return (0);
}