tests/test-malloc-posix.c

   1 /* Test of malloc function.
   2    Copyright (C) 2024-2025 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <stdlib.h>
  21
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <stdint.h>
  25
  26 #include "macros.h"
  27
  28 /* Work around clang bug
  29    <https://github.com/llvm/llvm-project/issues/114772>.  */
  30 void *(*volatile my_malloc) (size_t) = malloc;
  31 #undef malloc
  32 #define malloc my_malloc
  33
  34 int
  35 main ()
  36 {
  37   /* Check that malloc sets errno when it fails.
  38      Do this only in 64-bit processes, because there are many bi-arch systems
  39      nowadays where a 32-bit process can actually allocate 2 GiB of RAM.  */
  40   if (sizeof (size_t) >= 8)
  41     {
  42       void *p;
  43
  44       errno = 0;
  45       p = malloc (SIZE_MAX / 10);
  46       ASSERT (p == NULL);
  47       ASSERT (errno == ENOMEM);
  48
  49       errno = 0;
  50       p = malloc (SIZE_MAX / 3);
  51       ASSERT (p == NULL);
  52       ASSERT (errno == ENOMEM);
  53
  54       return test_exit_status;
  55     }
  56   else
  57     {
  58       fputs ("Skipping test: size_t is not 64-bits wide\n", stderr);
  59       return 77;
  60     }
  61 }