1/* Test for C17 alignment requirements.
2 Copyright (C) 2023-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <malloc.h>
21#include <stdint.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <libc-diag.h>
26#include <support/check.h>
27
28#include "tst-malloc-aux.h"
29
30static int
31do_test (void)
32{
33 void *p1;
34 void *p2;
35 void *p3;
36 void *p4;
37 void *p5;
38
39 errno = 0;
40
41 /* The implementation supports alignments that are non-negative powers of 2.
42 We test 5 distinct conditions here:
43 - A non-negative power of 2 alignment e.g. 64.
44 - A degenerate zero power of 2 alignment e.g. 1.
45 - A non-power-of-2 alignment e.g. 65.
46 - A zero alignment.
47 - A corner case SIZE_MAX / 2 + 1 alignment.
48 */
49
50 p1 = aligned_alloc (64, 64);
51
52 if (p1 == NULL)
53 FAIL_EXIT1 ("aligned_alloc(64, 64) failed");
54
55 p2 = aligned_alloc (1, 64);
56
57 if (p2 == NULL)
58 FAIL_EXIT1 ("aligned_alloc(1, 64) failed");
59
60 p3 = aligned_alloc (65, 64);
61
62 if (p3 != NULL)
63 FAIL_EXIT1 ("aligned_alloc(65, 64) did not fail");
64
65 p4 = aligned_alloc (0, 64);
66
67 if (p4 != NULL)
68 FAIL_EXIT1 ("aligned_alloc(0, 64) did not fail");
69
70 /* This is an alignment like 0x80000000...UL */
71 p5 = aligned_alloc (SIZE_MAX / 2 + 1, 64);
72
73 if (p5 != NULL)
74 FAIL_EXIT1 ("aligned_alloc(SIZE_MAX/2+1, 64) did not fail");
75
76 free (ptr: p1);
77 free (ptr: p2);
78 return 0;
79}
80
81#define TEST_FUNCTION do_test ()
82#include "../test-skeleton.c"
83

source code of glibc/malloc/tst-aligned-alloc.c