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27d0461b | 1 | /* Test for posix_memalign. |
2b778ceb | 2 | Copyright (C) 2013-2021 Free Software Foundation, Inc. |
4868b204 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/>. */ |
4868b204 WN |
18 | |
19 | #include <errno.h> | |
20 | #include <stdlib.h> | |
21 | #include <stdio.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
9bf8e29c | 24 | #include <libc-diag.h> |
4868b204 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 | int ret; | |
27d0461b | 40 | unsigned long pagesize = getpagesize (); |
4868b204 WN |
41 | unsigned long ptrval; |
42 | ||
43 | p = NULL; | |
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 | |
27d0461b WN |
51 | /* An attempt to allocate a huge value should return ENOMEM and |
52 | p should remain NULL. */ | |
4868b204 | 53 | ret = posix_memalign (&p, sizeof (void *), -1); |
9bf8e29c AZ |
54 | #if __GNUC_PREREQ (7, 0) |
55 | DIAG_POP_NEEDS_COMMENT; | |
56 | #endif | |
4868b204 WN |
57 | |
58 | if (ret != ENOMEM) | |
59 | merror ("posix_memalign (&p, sizeof (void *), -1) succeeded."); | |
60 | ||
61 | if (ret == ENOMEM && p != NULL) | |
62 | merror ("returned an error but pointer was modified"); | |
63 | ||
27d0461b WN |
64 | free (p); |
65 | ||
4868b204 WN |
66 | p = NULL; |
67 | ||
27d0461b | 68 | /* Test to expose integer overflow in malloc internals from BZ #15857. */ |
4868b204 WN |
69 | ret = posix_memalign (&p, pagesize, -pagesize); |
70 | ||
71 | if (ret != ENOMEM) | |
72 | merror ("posix_memalign (&p, pagesize, -pagesize) succeeded."); | |
73 | ||
27d0461b WN |
74 | free (p); |
75 | ||
4868b204 WN |
76 | p = NULL; |
77 | ||
a56ee40b WN |
78 | /* Test to expose integer overflow in malloc internals from BZ #16038. */ |
79 | ret = posix_memalign (&p, -1, pagesize); | |
80 | ||
81 | if (ret != EINVAL) | |
82 | merror ("posix_memalign (&p, -1, pagesize) succeeded."); | |
83 | ||
84 | free (p); | |
85 | ||
86 | p = NULL; | |
87 | ||
27d0461b WN |
88 | /* A zero-sized allocation should succeed with glibc, returning zero |
89 | and setting p to a non-NULL value. */ | |
4868b204 WN |
90 | ret = posix_memalign (&p, sizeof (void *), 0); |
91 | ||
92 | if (ret != 0 || p == NULL) | |
93 | merror ("posix_memalign (&p, sizeof (void *), 0) failed."); | |
94 | ||
95 | free (p); | |
96 | ||
97 | ret = posix_memalign (&p, 0x300, 10); | |
98 | ||
99 | if (ret != EINVAL) | |
100 | merror ("posix_memalign (&p, 0x300, 10) succeeded."); | |
101 | ||
102 | ret = posix_memalign (&p, 0, 10); | |
103 | ||
104 | if (ret != EINVAL) | |
105 | merror ("posix_memalign (&p, 0, 10) succeeded."); | |
106 | ||
107 | p = NULL; | |
108 | ||
109 | ret = posix_memalign (&p, 0x100, 10); | |
110 | ||
111 | if (ret != 0) | |
112 | merror ("posix_memalign (&p, 0x100, 10) failed."); | |
113 | ||
114 | if (ret == 0 && p == NULL) | |
115 | merror ("returned success but pointer is NULL"); | |
116 | ||
27d0461b | 117 | ptrval = (unsigned long) p; |
4868b204 | 118 | |
27d0461b | 119 | if (ret == 0 && (ptrval & 0xff) != 0) |
4868b204 WN |
120 | merror ("pointer is not aligned to 0x100"); |
121 | ||
122 | free (p); | |
123 | ||
124 | return errors != 0; | |
125 | } | |
126 | ||
127 | #define TEST_FUNCTION do_test () | |
128 | #include "../test-skeleton.c" |