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bb95ebbe KC |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Test cases for memcpy(), memmove(), and memset(). | |
4 | */ | |
5 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
6 | ||
7 | #include <kunit/test.h> | |
8 | #include <linux/device.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/overflow.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/vmalloc.h> | |
17 | ||
18 | struct some_bytes { | |
19 | union { | |
20 | u8 data[32]; | |
21 | struct { | |
22 | u32 one; | |
23 | u16 two; | |
24 | u8 three; | |
25 | /* 1 byte hole */ | |
26 | u32 four[4]; | |
27 | }; | |
28 | }; | |
29 | }; | |
30 | ||
31 | #define check(instance, v) do { \ | |
32 | int i; \ | |
33 | BUILD_BUG_ON(sizeof(instance.data) != 32); \ | |
34 | for (i = 0; i < sizeof(instance.data); i++) { \ | |
35 | KUNIT_ASSERT_EQ_MSG(test, instance.data[i], v, \ | |
36 | "line %d: '%s' not initialized to 0x%02x @ %d (saw 0x%02x)\n", \ | |
37 | __LINE__, #instance, v, i, instance.data[i]); \ | |
38 | } \ | |
39 | } while (0) | |
40 | ||
41 | #define compare(name, one, two) do { \ | |
42 | int i; \ | |
43 | BUILD_BUG_ON(sizeof(one) != sizeof(two)); \ | |
44 | for (i = 0; i < sizeof(one); i++) { \ | |
45 | KUNIT_EXPECT_EQ_MSG(test, one.data[i], two.data[i], \ | |
46 | "line %d: %s.data[%d] (0x%02x) != %s.data[%d] (0x%02x)\n", \ | |
47 | __LINE__, #one, i, one.data[i], #two, i, two.data[i]); \ | |
48 | } \ | |
49 | kunit_info(test, "ok: " TEST_OP "() " name "\n"); \ | |
50 | } while (0) | |
51 | ||
52 | static void memcpy_test(struct kunit *test) | |
53 | { | |
54 | #define TEST_OP "memcpy" | |
55 | struct some_bytes control = { | |
56 | .data = { 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
57 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
58 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
59 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
60 | }, | |
61 | }; | |
62 | struct some_bytes zero = { }; | |
63 | struct some_bytes middle = { | |
64 | .data = { 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
65 | 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, | |
66 | 0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, | |
67 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
68 | }, | |
69 | }; | |
70 | struct some_bytes three = { | |
71 | .data = { 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
72 | 0x20, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, | |
73 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
74 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
75 | }, | |
76 | }; | |
77 | struct some_bytes dest = { }; | |
78 | int count; | |
79 | u8 *ptr; | |
80 | ||
81 | /* Verify static initializers. */ | |
82 | check(control, 0x20); | |
83 | check(zero, 0); | |
84 | compare("static initializers", dest, zero); | |
85 | ||
86 | /* Verify assignment. */ | |
87 | dest = control; | |
88 | compare("direct assignment", dest, control); | |
89 | ||
90 | /* Verify complete overwrite. */ | |
91 | memcpy(dest.data, zero.data, sizeof(dest.data)); | |
92 | compare("complete overwrite", dest, zero); | |
93 | ||
94 | /* Verify middle overwrite. */ | |
95 | dest = control; | |
96 | memcpy(dest.data + 12, zero.data, 7); | |
97 | compare("middle overwrite", dest, middle); | |
98 | ||
99 | /* Verify argument side-effects aren't repeated. */ | |
100 | dest = control; | |
101 | ptr = dest.data; | |
102 | count = 1; | |
103 | memcpy(ptr++, zero.data, count++); | |
104 | ptr += 8; | |
105 | memcpy(ptr++, zero.data, count++); | |
106 | compare("argument side-effects", dest, three); | |
107 | #undef TEST_OP | |
108 | } | |
109 | ||
110 | static void memmove_test(struct kunit *test) | |
111 | { | |
112 | #define TEST_OP "memmove" | |
113 | struct some_bytes control = { | |
114 | .data = { 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
115 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
116 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
117 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
118 | }, | |
119 | }; | |
120 | struct some_bytes zero = { }; | |
121 | struct some_bytes middle = { | |
122 | .data = { 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
123 | 0x99, 0x99, 0x99, 0x99, 0x00, 0x00, 0x00, 0x00, | |
124 | 0x00, 0x00, 0x00, 0x99, 0x99, 0x99, 0x99, 0x99, | |
125 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
126 | }, | |
127 | }; | |
128 | struct some_bytes five = { | |
129 | .data = { 0x00, 0x00, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
130 | 0x99, 0x99, 0x00, 0x00, 0x00, 0x99, 0x99, 0x99, | |
131 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
132 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
133 | }, | |
134 | }; | |
135 | struct some_bytes overlap = { | |
136 | .data = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
137 | 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, | |
138 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
139 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
140 | }, | |
141 | }; | |
142 | struct some_bytes overlap_expected = { | |
143 | .data = { 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x04, 0x07, | |
144 | 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, | |
145 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
146 | 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, | |
147 | }, | |
148 | }; | |
149 | struct some_bytes dest = { }; | |
150 | int count; | |
151 | u8 *ptr; | |
152 | ||
153 | /* Verify static initializers. */ | |
154 | check(control, 0x99); | |
155 | check(zero, 0); | |
156 | compare("static initializers", zero, dest); | |
157 | ||
158 | /* Verify assignment. */ | |
159 | dest = control; | |
160 | compare("direct assignment", dest, control); | |
161 | ||
162 | /* Verify complete overwrite. */ | |
163 | memmove(dest.data, zero.data, sizeof(dest.data)); | |
164 | compare("complete overwrite", dest, zero); | |
165 | ||
166 | /* Verify middle overwrite. */ | |
167 | dest = control; | |
168 | memmove(dest.data + 12, zero.data, 7); | |
169 | compare("middle overwrite", dest, middle); | |
170 | ||
171 | /* Verify argument side-effects aren't repeated. */ | |
172 | dest = control; | |
173 | ptr = dest.data; | |
174 | count = 2; | |
175 | memmove(ptr++, zero.data, count++); | |
176 | ptr += 9; | |
177 | memmove(ptr++, zero.data, count++); | |
178 | compare("argument side-effects", dest, five); | |
179 | ||
180 | /* Verify overlapping overwrite is correct. */ | |
181 | ptr = &overlap.data[2]; | |
182 | memmove(ptr, overlap.data, 5); | |
183 | compare("overlapping write", overlap, overlap_expected); | |
184 | #undef TEST_OP | |
185 | } | |
186 | ||
187 | static void memset_test(struct kunit *test) | |
188 | { | |
189 | #define TEST_OP "memset" | |
190 | struct some_bytes control = { | |
191 | .data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
192 | 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
193 | 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
194 | 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
195 | }, | |
196 | }; | |
197 | struct some_bytes complete = { | |
198 | .data = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
199 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
200 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
201 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
202 | }, | |
203 | }; | |
204 | struct some_bytes middle = { | |
205 | .data = { 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x31, 0x31, | |
206 | 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, | |
207 | 0x31, 0x31, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, | |
208 | 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
209 | }, | |
210 | }; | |
211 | struct some_bytes three = { | |
212 | .data = { 0x60, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
213 | 0x30, 0x61, 0x61, 0x30, 0x30, 0x30, 0x30, 0x30, | |
214 | 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
215 | 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
216 | }, | |
217 | }; | |
4797632f KC |
218 | struct some_bytes after = { |
219 | .data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x72, | |
220 | 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, | |
221 | 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, | |
222 | 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, | |
223 | }, | |
224 | }; | |
6dbefad4 KC |
225 | struct some_bytes startat = { |
226 | .data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, | |
227 | 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, | |
228 | 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, | |
229 | 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, | |
230 | }, | |
231 | }; | |
bb95ebbe KC |
232 | struct some_bytes dest = { }; |
233 | int count, value; | |
234 | u8 *ptr; | |
235 | ||
236 | /* Verify static initializers. */ | |
237 | check(control, 0x30); | |
238 | check(dest, 0); | |
239 | ||
240 | /* Verify assignment. */ | |
241 | dest = control; | |
242 | compare("direct assignment", dest, control); | |
243 | ||
244 | /* Verify complete overwrite. */ | |
245 | memset(dest.data, 0xff, sizeof(dest.data)); | |
246 | compare("complete overwrite", dest, complete); | |
247 | ||
248 | /* Verify middle overwrite. */ | |
249 | dest = control; | |
250 | memset(dest.data + 4, 0x31, 16); | |
251 | compare("middle overwrite", dest, middle); | |
252 | ||
253 | /* Verify argument side-effects aren't repeated. */ | |
254 | dest = control; | |
255 | ptr = dest.data; | |
256 | value = 0x60; | |
257 | count = 1; | |
258 | memset(ptr++, value++, count++); | |
259 | ptr += 8; | |
260 | memset(ptr++, value++, count++); | |
261 | compare("argument side-effects", dest, three); | |
4797632f KC |
262 | |
263 | /* Verify memset_after() */ | |
264 | dest = control; | |
265 | memset_after(&dest, 0x72, three); | |
266 | compare("memset_after()", dest, after); | |
267 | ||
6dbefad4 KC |
268 | /* Verify memset_startat() */ |
269 | dest = control; | |
270 | memset_startat(&dest, 0x79, four); | |
271 | compare("memset_startat()", dest, startat); | |
bb95ebbe KC |
272 | #undef TEST_OP |
273 | } | |
274 | ||
275 | static struct kunit_case memcpy_test_cases[] = { | |
276 | KUNIT_CASE(memset_test), | |
277 | KUNIT_CASE(memcpy_test), | |
278 | KUNIT_CASE(memmove_test), | |
279 | {} | |
280 | }; | |
281 | ||
282 | static struct kunit_suite memcpy_test_suite = { | |
283 | .name = "memcpy", | |
284 | .test_cases = memcpy_test_cases, | |
285 | }; | |
286 | ||
287 | kunit_test_suite(memcpy_test_suite); | |
288 | ||
289 | MODULE_LICENSE("GPL"); |