1 | /* Support for testing and measuring memcpy functions. |
2 | Copyright (C) 1999-2024 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 | /* This fail contains the actual memcpy test functions. It is included |
20 | in test-memcpy.c and test-memcpy-large.c. They are split because |
21 | the tests take a long time to run and splitting them allows for |
22 | simpler parallel testing. */ |
23 | |
24 | #ifndef MEMCPY_RESULT |
25 | #define MEMCPY_RESULT(dst, len) dst |
26 | #define MIN_PAGE_SIZE 131072 |
27 | #define TEST_MAIN |
28 | #define TEST_NAME "memcpy" |
29 | #define TIMEOUT (8 * 60) |
30 | #include "test-string.h" |
31 | |
32 | IMPL (memcpy, 1) |
33 | |
34 | /* Naive implementation to verify results. */ |
35 | char * |
36 | simple_memcpy (char *dst, const char *src, size_t n) |
37 | { |
38 | char *ret = dst; |
39 | while (n--) |
40 | *dst++ = *src++; |
41 | return ret; |
42 | } |
43 | |
44 | #endif |
45 | typedef char *(*proto_t) (char *, const char *, size_t); |
46 | typedef uint32_t __attribute__ ((may_alias, aligned (1))) unaligned_uint32_t; |
47 | |
48 | static void |
49 | do_one_test (impl_t *impl, char *dst, const char *src, size_t len) |
50 | { |
51 | size_t i; |
52 | |
53 | /* Must clear the destination buffer set by the previous run. */ |
54 | for (i = 0; i < len; i++) |
55 | dst[i] = 0; |
56 | |
57 | if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len)) |
58 | { |
59 | error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p" , impl->name, |
60 | CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len)); |
61 | ret = 1; |
62 | return; |
63 | } |
64 | |
65 | if (memcmp (dst, src, len) != 0) |
66 | { |
67 | error (status: 0, errnum: 0, |
68 | format: "Wrong result in function %s dst %p \"%.*s\" src %p \"%.*s\" len " |
69 | "%zu" , |
70 | impl->name, dst, (int)len, dst, src, (int)len, src, len); |
71 | ret = 1; |
72 | return; |
73 | } |
74 | } |
75 | |
76 | static void |
77 | do_test (size_t align1, size_t align2, size_t len) |
78 | { |
79 | size_t i, j; |
80 | char *s1, *s2; |
81 | |
82 | align1 &= 4095; |
83 | if (align1 + len >= page_size) |
84 | return; |
85 | |
86 | align2 &= 4095; |
87 | if (align2 + len >= page_size) |
88 | return; |
89 | |
90 | s1 = (char *)(buf1 + align1); |
91 | s2 = (char *)(buf2 + align2); |
92 | for (size_t repeats = 0; repeats < 2; ++repeats) |
93 | { |
94 | for (i = 0, j = 1; i < len; i++, j += 23) |
95 | s1[i] = j; |
96 | |
97 | FOR_EACH_IMPL (impl, 0) |
98 | do_one_test (impl, dst: s2, src: s1, len); |
99 | |
100 | s1 = (char *) (buf2 + align1); |
101 | s2 = (char *) (buf1 + align2); |
102 | } |
103 | } |
104 | |
105 | static void |
106 | do_test1 (size_t align1, size_t align2, size_t size) |
107 | { |
108 | void *large_buf; |
109 | size_t mmap_size, region_size; |
110 | |
111 | align1 &= (page_size - 1); |
112 | if (align1 == 0) |
113 | align1 = page_size; |
114 | |
115 | align2 &= (page_size - 1); |
116 | if (align2 == 0) |
117 | align2 = page_size; |
118 | |
119 | region_size = (size + page_size - 1) & (~(page_size - 1)); |
120 | |
121 | mmap_size = region_size * 2 + 3 * page_size; |
122 | large_buf = mmap (NULL, len: mmap_size, PROT_READ | PROT_WRITE, |
123 | MAP_PRIVATE | MAP_ANON, fd: -1, offset: 0); |
124 | if (large_buf == MAP_FAILED) |
125 | { |
126 | puts (s: "Failed to allocate large_buf, skipping do_test" ); |
127 | return; |
128 | } |
129 | if (mprotect (addr: large_buf + region_size + page_size, len: page_size, PROT_NONE)) |
130 | error (EXIT_FAILURE, errno, format: "mprotect failed" ); |
131 | |
132 | size_t array_size = size / sizeof (uint32_t); |
133 | unaligned_uint32_t *dest = large_buf + align1; |
134 | unaligned_uint32_t *src = large_buf + region_size + 2 * page_size + align2; |
135 | size_t i; |
136 | for (size_t repeats = 0; repeats < 2; repeats++) |
137 | { |
138 | for (i = 0; i < array_size; i++) |
139 | src[i] = (uint32_t)i; |
140 | FOR_EACH_IMPL (impl, 0) |
141 | { |
142 | memset (dest, -1, size); |
143 | CALL (impl, (char *)dest, (char *)src, size); |
144 | if (memcmp (src, dest, size)) |
145 | { |
146 | for (i = 0; i < array_size; i++) |
147 | if (dest[i] != src[i]) |
148 | { |
149 | error (status: 0, errnum: 0, |
150 | format: "Wrong result in function %s dst \"%p\" src \"%p\" " |
151 | "offset \"%zd\"" , |
152 | impl->name, dest, src, i); |
153 | ret = 1; |
154 | munmap (addr: (void *)large_buf, len: mmap_size); |
155 | return; |
156 | } |
157 | } |
158 | } |
159 | dest = large_buf + region_size + 2 * page_size + align1; |
160 | src = large_buf + align2; |
161 | } |
162 | munmap (addr: (void *)large_buf, len: mmap_size); |
163 | } |
164 | |