Jakub Czapiga | f5e636c | 2021-02-19 10:09:42 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #define memmove cb_memmove |
| 4 | #include "../lib/memmove.c" |
| 5 | #undef memmove |
| 6 | |
| 7 | #include <stdlib.h> |
| 8 | #include <tests/test.h> |
| 9 | #include <commonlib/helpers.h> |
| 10 | #include <types.h> |
| 11 | |
| 12 | #define MEMMOVE_BUFFER_SZ (4 * KiB) |
| 13 | |
| 14 | /* Prototype of memmove() from string.h was changed to cb_memmove(). |
| 15 | It has to be defined again. */ |
| 16 | void *memmove(void *dst, const void *src, size_t n); |
| 17 | |
| 18 | struct test_memmove_data { |
| 19 | u8 *buffer_from; |
| 20 | u8 *buffer_to; |
| 21 | u8 *helper_buffer; |
| 22 | }; |
| 23 | |
| 24 | int setup_test(void **state) |
| 25 | { |
| 26 | struct test_memmove_data *s = malloc(sizeof(struct test_memmove_data)); |
| 27 | |
| 28 | if (!s) |
| 29 | return -1; |
| 30 | |
| 31 | s->buffer_from = malloc(MEMMOVE_BUFFER_SZ); |
| 32 | s->buffer_to = malloc(MEMMOVE_BUFFER_SZ); |
| 33 | s->helper_buffer = malloc(MEMMOVE_BUFFER_SZ); |
| 34 | |
| 35 | if (!s->buffer_from || !s->buffer_to || !s->helper_buffer) { |
| 36 | free(s->buffer_from); |
| 37 | free(s->buffer_to); |
| 38 | free(s->helper_buffer); |
| 39 | free(s); |
| 40 | return -1; |
| 41 | } |
| 42 | |
| 43 | /* Fill buffers with different values (other than zero) to make them distinguishable. |
| 44 | The helper buffer is often used as a backup of destination buffer so it has the |
| 45 | same value. */ |
| 46 | memset(s->buffer_from, 0xAB, MEMMOVE_BUFFER_SZ); |
| 47 | memset(s->buffer_to, 0xBC, MEMMOVE_BUFFER_SZ); |
| 48 | memset(s->helper_buffer, 0xBC, MEMMOVE_BUFFER_SZ); |
| 49 | |
| 50 | *state = s; |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | int teardown_test(void **state) |
| 56 | { |
| 57 | struct test_memmove_data *s = *state; |
| 58 | |
| 59 | free(s->buffer_from); |
| 60 | free(s->buffer_to); |
| 61 | free(s->helper_buffer); |
| 62 | free(s); |
| 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | /* Fill buffer with values from provided range [start; end] in circular way. */ |
| 68 | static void fill_buffer_data_range(u8 *buffer, size_t sz, u8 start_value, u8 end_value) |
| 69 | { |
| 70 | for (size_t i = 0; i < sz; ++i) |
| 71 | buffer[i] = (start_value + i) % (end_value - start_value + 1); |
| 72 | } |
| 73 | |
| 74 | static void test_memmove_full_buffer_copy(void **state) |
| 75 | { |
| 76 | struct test_memmove_data *s = *state; |
| 77 | void *res_cb; |
| 78 | |
| 79 | fill_buffer_data_range(s->buffer_from, MEMMOVE_BUFFER_SZ, 0, 255); |
| 80 | |
| 81 | res_cb = cb_memmove(s->buffer_to, s->buffer_from, MEMMOVE_BUFFER_SZ); |
| 82 | |
| 83 | assert_ptr_equal(s->buffer_to, res_cb); |
| 84 | assert_memory_equal(s->buffer_from, s->buffer_to, MEMMOVE_BUFFER_SZ); |
| 85 | } |
| 86 | |
| 87 | static void test_memmove_zero_size(void **state) |
| 88 | { |
| 89 | struct test_memmove_data *s = *state; |
| 90 | void *res_cb; |
| 91 | |
| 92 | fill_buffer_data_range(s->buffer_from, MEMMOVE_BUFFER_SZ, 'A', 'Z'); |
| 93 | |
| 94 | /* Expect no change in destination buffer. */ |
| 95 | res_cb = cb_memmove(s->buffer_to, s->buffer_from, 0); |
| 96 | assert_ptr_equal(res_cb, s->buffer_to); |
| 97 | assert_memory_equal(s->buffer_to, s->helper_buffer, MEMMOVE_BUFFER_SZ); |
| 98 | } |
| 99 | |
| 100 | static void test_memmove_buffer_part(void **state) |
| 101 | { |
| 102 | struct test_memmove_data *s = *state; |
| 103 | void *res_cb; |
| 104 | const size_t offset = MEMMOVE_BUFFER_SZ / 4; |
| 105 | const size_t sz = MEMMOVE_BUFFER_SZ / 3; |
| 106 | |
| 107 | /* Self-test for correct data ranges */ |
| 108 | assert_true(offset + sz <= MEMMOVE_BUFFER_SZ); |
| 109 | |
| 110 | fill_buffer_data_range(s->buffer_from, MEMMOVE_BUFFER_SZ, '0', '9'); |
| 111 | |
| 112 | /* Expect only *sz* bytes of buffer to be copied. Helper buffer is used as template. */ |
| 113 | res_cb = cb_memmove(s->buffer_to + offset, s->buffer_from, sz); |
| 114 | assert_ptr_equal(s->buffer_to + offset, res_cb); |
| 115 | assert_memory_equal(s->buffer_to, s->helper_buffer, offset); |
| 116 | assert_memory_equal(s->buffer_to + offset, s->buffer_from, sz); |
| 117 | assert_memory_equal(s->buffer_to + offset + sz, s->helper_buffer + offset + sz, |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 118 | MEMMOVE_BUFFER_SZ - (offset + sz)); |
Jakub Czapiga | f5e636c | 2021-02-19 10:09:42 +0100 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static void test_memmove_buffer_part_unaligned(void **state) |
| 122 | { |
| 123 | struct test_memmove_data *s = *state; |
| 124 | void *res_cb; |
| 125 | const size_t dst_offset = MEMMOVE_BUFFER_SZ / 8 + 3; |
| 126 | const size_t src_offset = MEMMOVE_BUFFER_SZ / 4 - 3; |
| 127 | const size_t sz = MEMMOVE_BUFFER_SZ / 4 + 7; |
| 128 | |
| 129 | /* Self-test for correct data ranges */ |
| 130 | assert_true(dst_offset + sz <= MEMMOVE_BUFFER_SZ); |
| 131 | assert_true(src_offset + sz <= MEMMOVE_BUFFER_SZ); |
| 132 | |
| 133 | fill_buffer_data_range(s->buffer_from, MEMMOVE_BUFFER_SZ, 0x13, 0xB7); |
| 134 | |
| 135 | res_cb = cb_memmove(s->buffer_to + dst_offset, s->buffer_from + src_offset, sz); |
| 136 | assert_ptr_equal(s->buffer_to + dst_offset, res_cb); |
| 137 | assert_memory_equal(s->buffer_to, s->helper_buffer, dst_offset); |
| 138 | assert_memory_equal(s->buffer_to + dst_offset, s->buffer_from + src_offset, sz); |
| 139 | assert_memory_equal(s->buffer_to + dst_offset + sz, s->helper_buffer + dst_offset + sz, |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 140 | MEMMOVE_BUFFER_SZ - (dst_offset + sz)); |
Jakub Czapiga | f5e636c | 2021-02-19 10:09:42 +0100 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static void test_memmove_copy_to_itself(void **state) |
| 144 | { |
| 145 | struct test_memmove_data *s = *state; |
| 146 | void *res_cb; |
| 147 | |
| 148 | fill_buffer_data_range(s->buffer_to, MEMMOVE_BUFFER_SZ, 'G', 'X'); |
| 149 | memmove(s->buffer_to, s->helper_buffer, MEMMOVE_BUFFER_SZ); |
| 150 | |
| 151 | /* Expect no change in source/destination buffer. */ |
| 152 | res_cb = cb_memmove(s->buffer_to, s->buffer_to, MEMMOVE_BUFFER_SZ); |
| 153 | assert_ptr_equal(res_cb, s->buffer_to); |
| 154 | assert_memory_equal(s->buffer_to, s->helper_buffer, MEMMOVE_BUFFER_SZ); |
| 155 | } |
| 156 | |
| 157 | static void test_memmove_self_higher_to_lower(void **state) |
| 158 | { |
| 159 | struct test_memmove_data *s = *state; |
| 160 | void *res_cb; |
| 161 | const size_t offset = MEMMOVE_BUFFER_SZ / 8; |
| 162 | const size_t sz = MEMMOVE_BUFFER_SZ - offset; |
| 163 | |
| 164 | fill_buffer_data_range(s->buffer_to, MEMMOVE_BUFFER_SZ, 'd', 'v'); |
| 165 | memmove(s->helper_buffer, s->buffer_to, MEMMOVE_BUFFER_SZ); |
| 166 | |
| 167 | /* Expect only *sz* bytes to be overwritten and *offset* bytes to be left at the end. */ |
| 168 | res_cb = cb_memmove(s->buffer_to, s->buffer_to + offset, sz); |
| 169 | assert_ptr_equal(res_cb, s->buffer_to); |
| 170 | assert_memory_equal(s->buffer_to, s->helper_buffer + offset, sz); |
| 171 | assert_memory_equal(s->buffer_to + sz, s->helper_buffer + sz, offset); |
| 172 | } |
| 173 | |
| 174 | static void test_memmove_self_higher_to_lower_unaligned(void **state) |
| 175 | { |
| 176 | struct test_memmove_data *s = *state; |
| 177 | void *res_cb; |
| 178 | const size_t offset = MEMMOVE_BUFFER_SZ / 6 + 7; |
| 179 | const size_t sz = MEMMOVE_BUFFER_SZ - offset; |
| 180 | |
| 181 | fill_buffer_data_range(s->buffer_to, MEMMOVE_BUFFER_SZ, 'd', 'v'); |
| 182 | memmove(s->helper_buffer, s->buffer_to, MEMMOVE_BUFFER_SZ); |
| 183 | |
| 184 | /* Expect only *sz* bytes to be overwritten and *offset* bytes to be left at the end. */ |
| 185 | res_cb = cb_memmove(s->buffer_to, s->buffer_to + offset, sz); |
| 186 | assert_ptr_equal(res_cb, s->buffer_to); |
| 187 | assert_memory_equal(s->buffer_to, s->helper_buffer + offset, sz); |
| 188 | assert_memory_equal(s->buffer_to + sz, s->helper_buffer + sz, offset); |
| 189 | } |
| 190 | |
| 191 | static void test_memmove_self_lower_to_higher(void **state) |
| 192 | { |
| 193 | struct test_memmove_data *s = *state; |
| 194 | void *res_cb; |
| 195 | const size_t offset = MEMMOVE_BUFFER_SZ / 4; |
| 196 | const size_t sz = MEMMOVE_BUFFER_SZ - offset; |
| 197 | |
| 198 | fill_buffer_data_range(s->buffer_to, MEMMOVE_BUFFER_SZ, 'd', 'v'); |
| 199 | memmove(s->helper_buffer, s->buffer_to, MEMMOVE_BUFFER_SZ); |
| 200 | |
| 201 | /* Expect only *sz* bytes to be overwritten and *offset* bytes to be left at the end. */ |
| 202 | res_cb = cb_memmove(s->buffer_to + offset, s->buffer_to, sz); |
| 203 | assert_ptr_equal(res_cb, s->buffer_to + offset); |
| 204 | assert_memory_equal(s->buffer_to + offset, s->helper_buffer, sz); |
| 205 | assert_memory_equal(s->buffer_to, s->helper_buffer, offset); |
| 206 | } |
| 207 | |
| 208 | static void test_memmove_self_lower_to_higher_unaligned(void **state) |
| 209 | { |
| 210 | struct test_memmove_data *s = *state; |
| 211 | void *res_cb; |
| 212 | const size_t offset = MEMMOVE_BUFFER_SZ / 4 - 17; |
| 213 | const size_t sz = MEMMOVE_BUFFER_SZ - offset; |
| 214 | |
| 215 | fill_buffer_data_range(s->buffer_to, MEMMOVE_BUFFER_SZ, 'd', 'v'); |
| 216 | memmove(s->helper_buffer, s->buffer_to, MEMMOVE_BUFFER_SZ); |
| 217 | |
| 218 | /* Expect only *sz* bytes to be overwritten and *offset* bytes to be left at the end. */ |
| 219 | res_cb = cb_memmove(s->buffer_to + offset, s->buffer_to, sz); |
| 220 | assert_ptr_equal(res_cb, s->buffer_to + offset); |
| 221 | assert_memory_equal(s->buffer_to + offset, s->helper_buffer, sz); |
| 222 | assert_memory_equal(s->buffer_to, s->helper_buffer, offset); |
| 223 | } |
| 224 | |
| 225 | int main(void) |
| 226 | { |
| 227 | const struct CMUnitTest tests[] = { |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 228 | cmocka_unit_test_setup_teardown(test_memmove_full_buffer_copy, setup_test, |
| 229 | teardown_test), |
| 230 | cmocka_unit_test_setup_teardown(test_memmove_zero_size, setup_test, |
| 231 | teardown_test), |
| 232 | cmocka_unit_test_setup_teardown(test_memmove_buffer_part, setup_test, |
| 233 | teardown_test), |
| 234 | cmocka_unit_test_setup_teardown(test_memmove_buffer_part_unaligned, setup_test, |
| 235 | teardown_test), |
| 236 | cmocka_unit_test_setup_teardown(test_memmove_copy_to_itself, setup_test, |
| 237 | teardown_test), |
| 238 | cmocka_unit_test_setup_teardown(test_memmove_self_higher_to_lower, setup_test, |
| 239 | teardown_test), |
Jakub Czapiga | f5e636c | 2021-02-19 10:09:42 +0100 | [diff] [blame] | 240 | cmocka_unit_test_setup_teardown(test_memmove_self_higher_to_lower_unaligned, |
| 241 | setup_test, teardown_test), |
Jakub Czapiga | c08b6a7 | 2022-01-10 13:36:47 +0000 | [diff] [blame] | 242 | cmocka_unit_test_setup_teardown(test_memmove_self_lower_to_higher, setup_test, |
| 243 | teardown_test), |
Jakub Czapiga | f5e636c | 2021-02-19 10:09:42 +0100 | [diff] [blame] | 244 | cmocka_unit_test_setup_teardown(test_memmove_self_lower_to_higher_unaligned, |
| 245 | setup_test, teardown_test), |
| 246 | }; |
| 247 | |
Jakub Czapiga | 7c6081e | 2021-08-25 16:27:35 +0200 | [diff] [blame] | 248 | return cb_run_group_tests(tests, NULL, NULL); |
Jakub Czapiga | f5e636c | 2021-02-19 10:09:42 +0100 | [diff] [blame] | 249 | } |