usr/src/lib/libmtmalloc/tests/dblfree.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 "mtmalloc.h"
  31
  32 /*
  33  * test double free. The first double free should be fine.
  34  * the next double free should result in a core dump.
  35  *
  36  * cc -O -o dblfree dblfree.c -I../common -lmtmalloc
  37  */
  38
  39 main(int argc, char ** argv)
  40 {
  41         char *foo;
  42
  43         foo = malloc(10);
  44         free(foo);
  45
  46         mallocctl(MTDOUBLEFREE, 1);
  47
  48         printf("Double free coming up\n");
  49         printf("This should NOT dump core.\n");
  50         free(foo);
  51
  52         foo = malloc(10);
  53         free(foo);
  54
  55         mallocctl(MTDOUBLEFREE, 0);
  56
  57         printf("Double free coming up\n");
  58         printf("This should dump core.\n");
  59
  60         free(foo);
  61 }