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215c7d43 | 1 | /* Test for memalign. |
2b778ceb | 2 | Copyright (C) 2013-2021 Free Software Foundation, Inc. |
215c7d43 WN |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
215c7d43 WN |
18 | |
19 | #include <errno.h> | |
20 | #include <malloc.h> | |
21 | #include <stdio.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
9bf8e29c | 24 | #include <libc-diag.h> |
215c7d43 WN |
25 | |
26 | static int errors = 0; | |
27 | ||
28 | static void | |
29 | merror (const char *msg) | |
30 | { | |
31 | ++errors; | |
32 | printf ("Error: %s\n", msg); | |
33 | } | |
34 | ||
35 | static int | |
36 | do_test (void) | |
37 | { | |
38 | void *p; | |
39 | unsigned long pagesize = getpagesize (); | |
40 | unsigned long ptrval; | |
41 | int save; | |
42 | ||
43 | errno = 0; | |
44 | ||
9bf8e29c AZ |
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 | |
215c7d43 WN |
51 | /* An attempt to allocate a huge value should return NULL and set |
52 | errno to ENOMEM. */ | |
53 | p = memalign (sizeof (void *), -1); | |
9bf8e29c AZ |
54 | #if __GNUC_PREREQ (7, 0) |
55 | DIAG_POP_NEEDS_COMMENT; | |
56 | #endif | |
215c7d43 WN |
57 | |
58 | save = errno; | |
59 | ||
60 | if (p != NULL) | |
61 | merror ("memalign (sizeof (void *), -1) succeeded."); | |
62 | ||
63 | if (p == NULL && save != ENOMEM) | |
64 | merror ("memalign (sizeof (void *), -1) errno is not set correctly"); | |
65 | ||
66 | free (p); | |
67 | ||
68 | errno = 0; | |
69 | ||
70 | /* Test to expose integer overflow in malloc internals from BZ #15857. */ | |
71 | p = memalign (pagesize, -pagesize); | |
72 | ||
73 | save = errno; | |
74 | ||
75 | if (p != NULL) | |
76 | merror ("memalign (pagesize, -pagesize) succeeded."); | |
77 | ||
78 | if (p == NULL && save != ENOMEM) | |
79 | merror ("memalign (pagesize, -pagesize) errno is not set correctly"); | |
80 | ||
81 | free (p); | |
82 | ||
a56ee40b WN |
83 | errno = 0; |
84 | ||
85 | /* Test to expose integer overflow in malloc internals from BZ #16038. */ | |
86 | p = memalign (-1, pagesize); | |
87 | ||
88 | save = errno; | |
89 | ||
90 | if (p != NULL) | |
91 | merror ("memalign (-1, pagesize) succeeded."); | |
92 | ||
93 | if (p == NULL && save != EINVAL) | |
94 | merror ("memalign (-1, pagesize) errno is not set correctly"); | |
95 | ||
96 | free (p); | |
97 | ||
215c7d43 WN |
98 | /* A zero-sized allocation should succeed with glibc, returning a |
99 | non-NULL value. */ | |
100 | p = memalign (sizeof (void *), 0); | |
101 | ||
102 | if (p == NULL) | |
103 | merror ("memalign (sizeof (void *), 0) failed."); | |
104 | ||
105 | free (p); | |
106 | ||
107 | /* Check the alignment of the returned pointer is correct. */ | |
108 | p = memalign (0x100, 10); | |
109 | ||
110 | if (p == NULL) | |
111 | merror ("memalign (0x100, 10) failed."); | |
112 | ||
113 | ptrval = (unsigned long) p; | |
114 | ||
115 | if ((ptrval & 0xff) != 0) | |
116 | merror ("pointer is not aligned to 0x100"); | |
117 | ||
118 | free (p); | |
119 | ||
120 | return errors != 0; | |
121 | } | |
122 | ||
123 | #define TEST_FUNCTION do_test () | |
124 | #include "../test-skeleton.c" |