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/* Test of realloc function.
Copyright (C) 2010-2024 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <stdlib.h>
#include <errno.h>
#include <stdint.h>
#include "macros.h"
int
main (int argc, _GL_UNUSED char **argv)
{
/* Check that realloc (NULL, 0) is not a NULL pointer. */
void *volatile p = realloc (NULL, 0);
ASSERT (p != NULL);
/* Check that realloc (p, n) fails when p is non-null and n exceeds
PTRDIFF_MAX. */
if (PTRDIFF_MAX < SIZE_MAX)
{
size_t one = argc != 12345;
p = realloc (p, PTRDIFF_MAX + one);
ASSERT (p == NULL);
/* Avoid a test failure due to glibc bug
<https://sourceware.org/bugzilla/show_bug.cgi?id=27870>. */
if (!getenv ("MALLOC_CHECK_"))
ASSERT (errno == ENOMEM);
}
free (p);
return 0;
}
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