1 | /* Test for 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 <malloc.h> |
21 | #include <stdio.h> |
22 | #include <string.h> |
23 | #include <unistd.h> |
24 | #include <libc-diag.h> |
25 | |
26 | static int errors = 0; |
27 | |
28 | static void |
29 | merror (const char *msg) |
30 | { |
31 | ++errors; |
32 | printf (format: "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 | |
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 NULL and set |
52 | errno to ENOMEM. */ |
53 | p = memalign (alignment: sizeof (void *), size: -1); |
54 | #if __GNUC_PREREQ (7, 0) |
55 | DIAG_POP_NEEDS_COMMENT; |
56 | #endif |
57 | |
58 | save = errno; |
59 | |
60 | if (p != NULL) |
61 | merror (msg: "memalign (sizeof (void *), -1) succeeded." ); |
62 | |
63 | if (p == NULL && save != ENOMEM) |
64 | merror (msg: "memalign (sizeof (void *), -1) errno is not set correctly" ); |
65 | |
66 | free (ptr: p); |
67 | |
68 | errno = 0; |
69 | |
70 | /* Test to expose integer overflow in malloc internals from BZ #15857. */ |
71 | p = memalign (alignment: pagesize, size: -pagesize); |
72 | |
73 | save = errno; |
74 | |
75 | if (p != NULL) |
76 | merror (msg: "memalign (pagesize, -pagesize) succeeded." ); |
77 | |
78 | if (p == NULL && save != ENOMEM) |
79 | merror (msg: "memalign (pagesize, -pagesize) errno is not set correctly" ); |
80 | |
81 | free (ptr: p); |
82 | |
83 | errno = 0; |
84 | |
85 | /* Test to expose integer overflow in malloc internals from BZ #16038. */ |
86 | p = memalign (alignment: -1, size: pagesize); |
87 | |
88 | save = errno; |
89 | |
90 | if (p != NULL) |
91 | merror (msg: "memalign (-1, pagesize) succeeded." ); |
92 | |
93 | if (p == NULL && save != EINVAL) |
94 | merror (msg: "memalign (-1, pagesize) errno is not set correctly" ); |
95 | |
96 | free (ptr: p); |
97 | |
98 | /* A zero-sized allocation should succeed with glibc, returning a |
99 | non-NULL value. */ |
100 | p = memalign (alignment: sizeof (void *), size: 0); |
101 | |
102 | if (p == NULL) |
103 | merror (msg: "memalign (sizeof (void *), 0) failed." ); |
104 | |
105 | free (ptr: p); |
106 | |
107 | /* Check the alignment of the returned pointer is correct. */ |
108 | p = memalign (alignment: 0x100, size: 10); |
109 | |
110 | if (p == NULL) |
111 | merror (msg: "memalign (0x100, 10) failed." ); |
112 | |
113 | ptrval = (unsigned long) p; |
114 | |
115 | if ((ptrval & 0xff) != 0) |
116 | merror (msg: "pointer is not aligned to 0x100" ); |
117 | |
118 | free (ptr: p); |
119 | |
120 | return errors != 0; |
121 | } |
122 | |
123 | #define TEST_FUNCTION do_test () |
124 | #include "../test-skeleton.c" |
125 | |