malloc/tst-malloc.c

   1 /* Copyright (C) 1999-2019 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <malloc.h>
  21 #include <stdio.h>
  22 #include <libc-diag.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 static int
  34 do_test (void)
  35 {
  36   void *p, *q;
  37   int save;
  38
  39   errno = 0;
  40
  41   DIAG_PUSH_NEEDS_COMMENT;
  42 #if __GNUC_PREREQ (7, 0)
  43   /* GCC 7 warns about too-large allocations; here we want to test
  44      that they fail.  */
  45   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  46 #endif
  47   p = malloc (-1);
  48   DIAG_POP_NEEDS_COMMENT;
  49   save = errno;
  50
  51   if (p != NULL)
  52     merror ("malloc (-1) succeeded.");
  53
  54   if (p == NULL && save != ENOMEM)
  55     merror ("errno is not set correctly");
  56
  57   p = malloc (10);
  58   if (p == NULL)
  59     merror ("malloc (10) failed.");
  60
  61   /* realloc (p, 0) == free (p).  */
  62   p = realloc (p, 0);
  63   if (p != NULL)
  64     merror ("realloc (p, 0) failed.");
  65
  66   p = malloc (0);
  67   if (p == NULL)
  68     merror ("malloc (0) failed.");
  69
  70   p = realloc (p, 0);
  71   if (p != NULL)
  72     merror ("realloc (p, 0) failed.");
  73
  74   p = malloc (513 * 1024);
  75   if (p == NULL)
  76     merror ("malloc (513K) failed.");
  77
  78   DIAG_PUSH_NEEDS_COMMENT;
  79 #if __GNUC_PREREQ (7, 0)
  80   /* GCC 7 warns about too-large allocations; here we want to test
  81      that they fail.  */
  82   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  83 #endif
  84   q = malloc (-512 * 1024);
  85   DIAG_POP_NEEDS_COMMENT;
  86   if (q != NULL)
  87     merror ("malloc (-512K) succeeded.");
  88
  89   free (p);
  90
  91   return errors != 0;
  92 }
  93
  94 #define TEST_FUNCTION do_test ()
  95 #include "../test-skeleton.c"