1/* Test for posix_memalign.
2 Copyright (C) 2013-2022 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 <stdlib.h>
21#include <stdio.h>
22#include <string.h>
23#include <unistd.h>
24#include <libc-diag.h>
25
26static int errors = 0;
27
28static void
29merror (const char *msg)
30{
31 ++errors;
32 printf (format: "Error: %s\n", msg);
33}
34
35static int
36do_test (void)
37{
38 void *p;
39 int ret;
40 unsigned long pagesize = getpagesize ();
41 unsigned long ptrval;
42
43 p = NULL;
44
45 DIAG_PUSH_NEEDS_COMMENT;
46#if __GNUC_PREREQ (7, 0)
47 /* GCC 7 warns about too-large allocations; here we want to test
48 that they fail. */
49 DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
50#endif
51 /* An attempt to allocate a huge value should return ENOMEM and
52 p should remain NULL. */
53 ret = posix_memalign (memptr: &p, alignment: sizeof (void *), size: -1);
54#if __GNUC_PREREQ (7, 0)
55 DIAG_POP_NEEDS_COMMENT;
56#endif
57
58 if (ret != ENOMEM)
59 merror (msg: "posix_memalign (&p, sizeof (void *), -1) succeeded.");
60
61 if (ret == ENOMEM && p != NULL)
62 merror (msg: "returned an error but pointer was modified");
63
64 free (ptr: p);
65
66 p = NULL;
67
68 /* Test to expose integer overflow in malloc internals from BZ #15857. */
69 ret = posix_memalign (memptr: &p, alignment: pagesize, size: -pagesize);
70
71 if (ret != ENOMEM)
72 merror (msg: "posix_memalign (&p, pagesize, -pagesize) succeeded.");
73
74 free (ptr: p);
75
76 p = NULL;
77
78 /* Test to expose integer overflow in malloc internals from BZ #16038. */
79 ret = posix_memalign (memptr: &p, alignment: -1, size: pagesize);
80
81 if (ret != EINVAL)
82 merror (msg: "posix_memalign (&p, -1, pagesize) succeeded.");
83
84 free (ptr: p);
85
86 p = NULL;
87
88 /* A zero-sized allocation should succeed with glibc, returning zero
89 and setting p to a non-NULL value. */
90 ret = posix_memalign (memptr: &p, alignment: sizeof (void *), size: 0);
91
92 if (ret != 0 || p == NULL)
93 merror (msg: "posix_memalign (&p, sizeof (void *), 0) failed.");
94
95 free (ptr: p);
96
97 ret = posix_memalign (memptr: &p, alignment: 0x300, size: 10);
98
99 if (ret != EINVAL)
100 merror (msg: "posix_memalign (&p, 0x300, 10) succeeded.");
101
102 ret = posix_memalign (memptr: &p, alignment: 0, size: 10);
103
104 if (ret != EINVAL)
105 merror (msg: "posix_memalign (&p, 0, 10) succeeded.");
106
107 p = NULL;
108
109 ret = posix_memalign (memptr: &p, alignment: 0x100, size: 10);
110
111 if (ret != 0)
112 merror (msg: "posix_memalign (&p, 0x100, 10) failed.");
113
114 if (ret == 0 && p == NULL)
115 merror (msg: "returned success but pointer is NULL");
116
117 ptrval = (unsigned long) p;
118
119 if (ret == 0 && (ptrval & 0xff) != 0)
120 merror (msg: "pointer is not aligned to 0x100");
121
122 free (ptr: p);
123
124 return errors != 0;
125}
126
127#define TEST_FUNCTION do_test ()
128#include "../test-skeleton.c"
129

source code of glibc/malloc/tst-posix_memalign.c