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/* Test for posix_memalign.
Copyright (C) 2013-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libc-diag.h>
static int errors = 0;
static void
merror (const char *msg)
{
++errors;
printf ("Error: %s\n", msg);
}
static int
do_test (void)
{
void *p;
int ret;
unsigned long pagesize = getpagesize ();
unsigned long ptrval;
p = NULL;
DIAG_PUSH_NEEDS_COMMENT;
#if __GNUC_PREREQ (7, 0)
/* GCC 7 warns about too-large allocations; here we want to test
that they fail. */
DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
#endif
/* An attempt to allocate a huge value should return ENOMEM and
p should remain NULL. */
ret = posix_memalign (&p, sizeof (void *), -1);
#if __GNUC_PREREQ (7, 0)
DIAG_POP_NEEDS_COMMENT;
#endif
if (ret != ENOMEM)
merror ("posix_memalign (&p, sizeof (void *), -1) succeeded.");
if (ret == ENOMEM && p != NULL)
merror ("returned an error but pointer was modified");
free (p);
p = NULL;
/* Test to expose integer overflow in malloc internals from BZ #15857. */
ret = posix_memalign (&p, pagesize, -pagesize);
if (ret != ENOMEM)
merror ("posix_memalign (&p, pagesize, -pagesize) succeeded.");
free (p);
p = NULL;
/* Test to expose integer overflow in malloc internals from BZ #16038. */
ret = posix_memalign (&p, -1, pagesize);
if (ret != EINVAL)
merror ("posix_memalign (&p, -1, pagesize) succeeded.");
free (p);
p = NULL;
/* A zero-sized allocation should succeed with glibc, returning zero
and setting p to a non-NULL value. */
ret = posix_memalign (&p, sizeof (void *), 0);
if (ret != 0 || p == NULL)
merror ("posix_memalign (&p, sizeof (void *), 0) failed.");
free (p);
ret = posix_memalign (&p, 0x300, 10);
if (ret != EINVAL)
merror ("posix_memalign (&p, 0x300, 10) succeeded.");
ret = posix_memalign (&p, 0, 10);
if (ret != EINVAL)
merror ("posix_memalign (&p, 0, 10) succeeded.");
p = NULL;
ret = posix_memalign (&p, 0x100, 10);
if (ret != 0)
merror ("posix_memalign (&p, 0x100, 10) failed.");
if (ret == 0 && p == NULL)
merror ("returned success but pointer is NULL");
ptrval = (unsigned long) p;
if (ret == 0 && (ptrval & 0xff) != 0)
merror ("pointer is not aligned to 0x100");
free (p);
return errors != 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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