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/* Test of reallocarray 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 "signature.h"
SIGNATURE_CHECK (reallocarray, void *, (void *, size_t, size_t));
#include "macros.h"
int
main ()
{
/* Check that reallocarray fails when requested to allocate a block
of memory larger than PTRDIFF_MAX or SIZE_MAX bytes. */
for (size_t n = 2; n != 0; n <<= 1)
{
void *volatile p = NULL;
if (PTRDIFF_MAX / n + 1 <= SIZE_MAX)
{
p = reallocarray (p, PTRDIFF_MAX / n + 1, n);
ASSERT (p == NULL);
ASSERT (errno == ENOMEM);
}
p = reallocarray (p, SIZE_MAX / n + 1, n);
ASSERT (p == NULL);
ASSERT (errno == ENOMEM
|| errno == EOVERFLOW /* NetBSD */);
/* Reallocarray should not crash with zero sizes. */
p = reallocarray (p, 0, n);
p = reallocarray (p, n, 0);
free (p);
}
return 0;
}
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