mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 16:50:07 +00:00
d1417176a3
This patch adds the strict checking for power-of-two alignments in aligned_alloc(), and updates the manual accordingly. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* Test for C17 alignment requirements.
|
|
Copyright (C) 2023 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 <malloc.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <libc-diag.h>
|
|
#include <support/check.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
void *p1;
|
|
void *p2;
|
|
void *p3;
|
|
void *p4;
|
|
void *p5;
|
|
|
|
errno = 0;
|
|
|
|
/* The implementation supports alignments that are non-negative powers of 2.
|
|
We test 5 distinct conditions here:
|
|
- A non-negative power of 2 alignment e.g. 64.
|
|
- A degenerate zero power of 2 alignment e.g. 1.
|
|
- A non-power-of-2 alignment e.g. 65.
|
|
- A zero alignment.
|
|
- A corner case SIZE_MAX / 2 + 1 alignment.
|
|
*/
|
|
|
|
p1 = aligned_alloc (64, 64);
|
|
|
|
if (p1 == NULL)
|
|
FAIL_EXIT1 ("aligned_alloc(64, 64) failed");
|
|
|
|
p2 = aligned_alloc (1, 64);
|
|
|
|
if (p2 == NULL)
|
|
FAIL_EXIT1 ("aligned_alloc(1, 64) failed");
|
|
|
|
p3 = aligned_alloc (65, 64);
|
|
|
|
if (p3 != NULL)
|
|
FAIL_EXIT1 ("aligned_alloc(65, 64) did not fail");
|
|
|
|
p4 = aligned_alloc (0, 64);
|
|
|
|
if (p4 != NULL)
|
|
FAIL_EXIT1 ("aligned_alloc(0, 64) did not fail");
|
|
|
|
/* This is an alignment like 0x80000000...UL */
|
|
p5 = aligned_alloc (SIZE_MAX / 2 + 1, 64);
|
|
|
|
if (p5 != NULL)
|
|
FAIL_EXIT1 ("aligned_alloc(SIZE_MAX/2+1, 64) did not fail");
|
|
|
|
free (p1);
|
|
free (p2);
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|