malloc/tst-malloc.c

   1 /* Copyright (C) 1999-2013 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1999.
   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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <malloc.h>
  21 #include <stdio.h>
  22
  23 static int errors = 0;
  24
  25 static void
  26 merror (const char *msg)
  27 {
  28   ++errors;
  29   printf ("Error: %s\n", msg);
  30 }
  31
  32 int
  33 main (void)
  34 {
  35   void *p, *q;
  36   int save;
  37
  38   errno = 0;
  39
  40   p = malloc (-1);
  41   save = errno;
  42
  43   if (p != NULL)
  44     merror ("malloc (-1) succeeded.");
  45
  46   if (p == NULL && save != ENOMEM)
  47     merror ("errno is not set correctly");
  48
  49   p = malloc (10);
  50   if (p == NULL)
  51     merror ("malloc (10) failed.");
  52
  53   /* realloc (p, 0) == free (p).  */
  54   p = realloc (p, 0);
  55   if (p != NULL)
  56     merror ("realloc (p, 0) failed.");
  57
  58   p = malloc (0);
  59   if (p == NULL)
  60     merror ("malloc (0) failed.");
  61
  62   p = realloc (p, 0);
  63   if (p != NULL)
  64     merror ("realloc (p, 0) failed.");
  65
  66   p = malloc (513 * 1024);
  67   if (p == NULL)
  68     merror ("malloc (513K) failed.");
  69
  70   q = malloc (-512 * 1024);
  71   if (q != NULL)
  72     merror ("malloc (-512K) succeeded.");
  73
  74   free (p);
  75
  76   return errors != 0;
  77 }