malloc/tst-mcheck.c

   1 /* Copyright (C) 2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 static int errors = 0;
  25
  26 static void
  27 merror (const char *msg)
  28 {
  29   ++errors;
  30   printf ("Error: %s\n", msg);
  31 }
  32
  33 int
  34 main (void)
  35 {
  36   void *p, *q;
  37
  38   errno = 0;
  39
  40   p = malloc (-1);
  41
  42   if (p != NULL)
  43     merror ("malloc (-1) succeeded.");
  44   else if (errno != ENOMEM)
  45     merror ("errno is not set correctly.");
  46
  47   p = malloc (10);
  48   if (p == NULL)
  49     merror ("malloc (10) failed.");
  50
  51   p = realloc (p, 0);
  52   if (p != NULL)
  53     merror ("realloc (p, 0) failed.");
  54
  55   p = malloc (0);
  56   if (p == NULL)
  57     merror ("malloc (0) failed.");
  58
  59   p = realloc (p, 0);
  60   if (p != NULL)
  61     merror ("realloc (p, 0) failed.");
  62
  63   q = malloc (256);
  64   if (q == NULL)
  65     merror ("malloc (256) failed.");
  66
  67   p = malloc (512);
  68   if (p == NULL)
  69     merror ("malloc (512) failed.");
  70
  71   if (realloc (p, -256) != NULL)
  72     merror ("realloc (p, -256) succeeded.");
  73   else if (errno != ENOMEM)
  74     merror ("errno is not set correctly.");
  75
  76   free (p);
  77
  78   p = malloc (512);
  79   if (p == NULL)
  80     merror ("malloc (512) failed.");
  81
  82   if (realloc (p, -1) != NULL)
  83     merror ("realloc (p, -1) succeeded.");
  84   else if (errno != ENOMEM)
  85     merror ("errno is not set correctly.");
  86
  87   free (p);
  88   free (q);
  89
  90   return errors != 0;
  91 }