malloc/tst-mcheck.c

   1 /* Copyright (C) 2005-2019 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <stdio.h>
  21 #include <stdlib.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
  38   errno = 0;
  39
  40   DIAG_PUSH_NEEDS_COMMENT;
  41 #if __GNUC_PREREQ (7, 0)
  42   /* GCC 7 warns about too-large allocations; here we want to test
  43      that they fail.  */
  44   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  45 #endif
  46   p = malloc (-1);
  47   DIAG_POP_NEEDS_COMMENT;
  48
  49   if (p != NULL)
  50     merror ("malloc (-1) succeeded.");
  51   else if (errno != ENOMEM)
  52     merror ("errno is not set correctly.");
  53
  54   p = malloc (10);
  55   if (p == NULL)
  56     merror ("malloc (10) failed.");
  57
  58   p = realloc (p, 0);
  59   if (p != NULL)
  60     merror ("realloc (p, 0) failed.");
  61
  62   p = malloc (0);
  63   if (p == NULL)
  64     merror ("malloc (0) failed.");
  65
  66   p = realloc (p, 0);
  67   if (p != NULL)
  68     merror ("realloc (p, 0) failed.");
  69
  70   q = malloc (256);
  71   if (q == NULL)
  72     merror ("malloc (256) failed.");
  73
  74   p = malloc (512);
  75   if (p == NULL)
  76     merror ("malloc (512) 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   if (realloc (p, -256) != NULL)
  85     merror ("realloc (p, -256) succeeded.");
  86   else if (errno != ENOMEM)
  87     merror ("errno is not set correctly.");
  88   DIAG_POP_NEEDS_COMMENT;
  89
  90   free (p);
  91
  92   p = malloc (512);
  93   if (p == NULL)
  94     merror ("malloc (512) failed.");
  95
  96   DIAG_PUSH_NEEDS_COMMENT;
  97 #if __GNUC_PREREQ (7, 0)
  98   /* GCC 7 warns about too-large allocations; here we want to test
  99      that they fail.  */
 100   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
 101 #endif
 102   if (realloc (p, -1) != NULL)
 103     merror ("realloc (p, -1) succeeded.");
 104   else if (errno != ENOMEM)
 105     merror ("errno is not set correctly.");
 106   DIAG_POP_NEEDS_COMMENT;
 107
 108   free (p);
 109   free (q);
 110
 111   return errors != 0;
 112 }
 113
 114 #define TEST_FUNCTION do_test ()
 115 #include "../test-skeleton.c"