usr/src/cmd/sendmail/libsm/t-heap.c

   1 /*
   2  * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  *
   5  * By using this file, you agree to the terms and conditions set
   6  * forth in the LICENSE file which can be found at the top level of
   7  * the sendmail distribution.
   8  */
   9
  10 #pragma ident   "%Z%%M% %I%     %E% SMI"
  11
  12 #include <sm/gen.h>
  13 SM_IDSTR(id, "@(#)$Id: t-heap.c,v 1.8 2001/03/06 17:27:36 ca Exp $")
  14
  15 #include <sm/debug.h>
  16 #include <sm/heap.h>
  17 #include <sm/io.h>
  18 #include <sm/test.h>
  19 #include <sm/xtrap.h>
  20
  21 #if SM_HEAP_CHECK
  22 extern SM_DEBUG_T SmHeapCheck;
  23 # define HEAP_CHECK sm_debug_active(&SmHeapCheck, 1)
  24 #else /* SM_HEAP_CHECK */
  25 # define HEAP_CHECK 0
  26 #endif /* SM_HEAP_CHECK */
  27
  28 int
  29 main(argc, argv)
  30         int argc;
  31         char **argv;
  32 {
  33         void *p;
  34
  35         sm_test_begin(argc, argv, "test heap handling");
  36         if (argc > 1)
  37                 sm_debug_addsettings_x(argv[1]);
  38
  39         p = sm_malloc(10);
  40         SM_TEST(p != NULL);
  41         p = sm_realloc_x(p, 20);
  42         SM_TEST(p != NULL);
  43         p = sm_realloc(p, 30);
  44         SM_TEST(p != NULL);
  45         if (HEAP_CHECK)
  46         {
  47                 sm_dprintf("heap with 1 30-byte block allocated:\n");
  48                 sm_heap_report(smioout, 3);
  49         }
  50
  51         if (HEAP_CHECK)
  52         {
  53                 sm_free(p);
  54                 sm_dprintf("heap with 0 blocks allocated:\n");
  55                 sm_heap_report(smioout, 3);
  56                 sm_dprintf("xtrap count = %d\n", SmXtrapCount);
  57         }
  58
  59 #if DEBUG
  60         /* this will cause a core dump */
  61         sm_dprintf("about to free %p for the second time\n", p);
  62         sm_free(p);
  63 #endif /* DEBUG */
  64
  65         return sm_test_end();
  66 }