malloc/tst-malloc.c

   1 /* Copyright (C) 1999 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <errno.h>
  21 #include <malloc.h>
  22 #include <stdio.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;
  37   int save;
  38
  39   errno = 0;
  40
  41   p = malloc (-1);
  42   save = errno;
  43
  44   if (p != NULL)
  45     merror ("malloc (-1) succeeded.");
  46
  47   if (p == NULL && save != ENOMEM)
  48     merror ("errno is not set correctly");
  49
  50   p = malloc (10);
  51   if (p == NULL)
  52     merror ("malloc (10) failed.");
  53
  54   /* realloc (p, 0) == free (p).  */
  55   p = realloc (p, 0);
  56   if (p != NULL)
  57     merror ("realloc (p, 0) failed.");
  58
  59   p = malloc (0);
  60   if (p == NULL)
  61     merror ("malloc (0) failed.");
  62
  63   p = realloc (p, 0);
  64   if (p != NULL)
  65     merror ("realloc (p, 0) failed.");
  66
  67   return errors != 0;
  68 }