malloc/tst-malloc-check.c

   1 /* Copyright (C) 2005-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <libc-diag.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 static int
  33 do_test (void)
  34 {
  35   void *p, *q;
  36
  37   errno = 0;
  38
  39   DIAG_PUSH_NEEDS_COMMENT;
  40 #if __GNUC_PREREQ (7, 0)
  41   /* GCC 7 warns about too-large allocations; here we want to test
  42      that they fail.  */
  43   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  44 #endif
  45   p = malloc (-1);
  46   DIAG_POP_NEEDS_COMMENT;
  47
  48   if (p != NULL)
  49     merror ("malloc (-1) succeeded.");
  50   else if (errno != ENOMEM)
  51     merror ("errno is not set correctly.");
  52
  53   p = malloc (10);
  54   if (p == NULL)
  55     merror ("malloc (10) failed.");
  56
  57   p = realloc (p, 0);
  58   if (p != NULL)
  59     merror ("realloc (p, 0) failed.");
  60
  61   p = malloc (0);
  62   if (p == NULL)
  63     merror ("malloc (0) failed.");
  64
  65   p = realloc (p, 0);
  66   if (p != NULL)
  67     merror ("realloc (p, 0) failed.");
  68
  69   q = malloc (256);
  70   if (q == NULL)
  71     merror ("malloc (256) failed.");
  72
  73   p = malloc (512);
  74   if (p == NULL)
  75     merror ("malloc (512) failed.");
  76
  77   DIAG_PUSH_NEEDS_COMMENT;
  78 #if __GNUC_PREREQ (7, 0)
  79   /* GCC 7 warns about too-large allocations; here we want to test
  80      that they fail.  */
  81   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
  82 #endif
  83   if (realloc (p, -256) != NULL)
  84     merror ("realloc (p, -256) succeeded.");
  85   else if (errno != ENOMEM)
  86     merror ("errno is not set correctly.");
  87   DIAG_POP_NEEDS_COMMENT;
  88
  89   free (p);
  90
  91   p = malloc (512);
  92   if (p == NULL)
  93     merror ("malloc (512) failed.");
  94
  95   DIAG_PUSH_NEEDS_COMMENT;
  96 #if __GNUC_PREREQ (7, 0)
  97   /* GCC 7 warns about too-large allocations; here we want to test
  98      that they fail.  */
  99   DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
 100 #endif
 101   if (realloc (p, -1) != NULL)
 102     merror ("realloc (p, -1) succeeded.");
 103   else if (errno != ENOMEM)
 104     merror ("errno is not set correctly.");
 105   DIAG_POP_NEEDS_COMMENT;
 106
 107   free (p);
 108   free (q);
 109
 110   return errors != 0;
 111 }
 112
 113 #define TEST_FUNCTION do_test ()
 114 #include "../test-skeleton.c"