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