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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* Include memcpy() source code and alter its name to compare results with libc memcpy() */
#define memcpy cb_memcpy
#include "../lib/memcpy.c"
#undef memcpy
#include <stdlib.h>
#include <tests/test.h>
#include <commonlib/helpers.h>
#include <types.h>
#define MEMCPY_BUFFER_SZ (4 * KiB)
/* Prototype of memcpy() from string.h was changed to cb_memcpy().
It has to be defined again. */
void *memcpy(void *dest, const void *src, size_t n);
struct test_memcpy_data {
u8 *buffer_from;
u8 *buffer_to;
u8 *helper_buffer;
};
int setup_test(void **state)
{
struct test_memcpy_data *s = malloc(sizeof(struct test_memcpy_data));
if (!s)
return -1;
s->buffer_from = malloc(MEMCPY_BUFFER_SZ);
s->buffer_to = malloc(MEMCPY_BUFFER_SZ);
s->helper_buffer = malloc(MEMCPY_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, MEMCPY_BUFFER_SZ);
memset(s->buffer_to, 0xBC, MEMCPY_BUFFER_SZ);
memset(s->helper_buffer, 0xBC, MEMCPY_BUFFER_SZ);
*state = s;
return 0;
}
int teardown_test(void **state)
{
struct test_memcpy_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_memcpy_full_buffer_copy(void **state)
{
struct test_memcpy_data *s = *state;
void *res_cb;
fill_buffer_data_range(s->buffer_from, MEMCPY_BUFFER_SZ, 0, 255);
res_cb = cb_memcpy(s->buffer_to, s->buffer_from, MEMCPY_BUFFER_SZ);
assert_ptr_equal(s->buffer_to, res_cb);
assert_memory_equal(s->buffer_from, s->buffer_to, MEMCPY_BUFFER_SZ);
}
static void test_memcpy_zero_size(void **state)
{
struct test_memcpy_data *s = *state;
void *res_cb;
fill_buffer_data_range(s->buffer_from, MEMCPY_BUFFER_SZ, 'A', 'Z');
/* Expect no change in destination buffer. */
res_cb = cb_memcpy(s->buffer_to, s->buffer_from, 0);
assert_ptr_equal(s->buffer_to, res_cb);
assert_memory_equal(s->buffer_to, s->helper_buffer, MEMCPY_BUFFER_SZ);
}
static void test_memcpy_buffer_part(void **state)
{
struct test_memcpy_data *s = *state;
void *res_cb;
const size_t offset = MEMCPY_BUFFER_SZ / 4;
const size_t sz = MEMCPY_BUFFER_SZ / 2;
/* Self-test for correct data ranges */
assert_true(offset + sz <= MEMCPY_BUFFER_SZ);
fill_buffer_data_range(s->buffer_from, MEMCPY_BUFFER_SZ, '0', '9');
/* Expect only *sz* bytes of buffer to be copied. Helper buffer is used as template. */
res_cb = cb_memcpy(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,
MEMCPY_BUFFER_SZ - (offset + sz));
}
static void test_memcpy_buffer_part_unaligned(void **state)
{
struct test_memcpy_data *s = *state;
void *res_cb;
const size_t dst_offset = MEMCPY_BUFFER_SZ / 8 + 3;
const size_t src_offset = MEMCPY_BUFFER_SZ / 4 - 3;
const size_t sz = MEMCPY_BUFFER_SZ / 4 + 7;
/* Self-test for correct data ranges */
assert_true(dst_offset + sz <= MEMCPY_BUFFER_SZ);
assert_true(src_offset + sz <= MEMCPY_BUFFER_SZ);
fill_buffer_data_range(s->buffer_from, MEMCPY_BUFFER_SZ, 0x13, 0xB7);
res_cb = cb_memcpy(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,
MEMCPY_BUFFER_SZ - (dst_offset + sz));
}
static void test_memcpy_copy_to_itself(void **state)
{
struct test_memcpy_data *s = *state;
void *res_cb;
fill_buffer_data_range(s->buffer_to, MEMCPY_BUFFER_SZ, 'G', 'X');
memcpy(s->buffer_to, s->helper_buffer, MEMCPY_BUFFER_SZ);
/* Expect no change in source/destination buffer. */
res_cb = cb_memcpy(s->buffer_to, s->buffer_to, MEMCPY_BUFFER_SZ);
assert_ptr_equal(s->buffer_to, res_cb);
assert_memory_equal(s->buffer_to, s->helper_buffer, MEMCPY_BUFFER_SZ);
}
static void test_memcpy_copy_part_of_itself_to_itself(void **state)
{
struct test_memcpy_data *s = *state;
void *res_cb;
const size_t offset = MEMCPY_BUFFER_SZ / 8;
const size_t sz = MEMCPY_BUFFER_SZ - offset;
/* Self-test for correct data ranges */
assert_true(offset + sz <= MEMCPY_BUFFER_SZ);
fill_buffer_data_range(s->buffer_to, MEMCPY_BUFFER_SZ, 'd', 'v');
memcpy(s->helper_buffer, s->buffer_to, MEMCPY_BUFFER_SZ);
/* Expect only *sz* bytes to be overwritten and *offset* bytes to be left at the end. */
res_cb = cb_memcpy(s->buffer_to, s->buffer_to + offset, sz);
assert_ptr_equal(s->buffer_to, res_cb);
assert_memory_equal(s->buffer_to, s->helper_buffer + offset, sz);
assert_memory_equal(s->buffer_to + sz, s->helper_buffer + sz, offset);
}
int main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(test_memcpy_full_buffer_copy, setup_test,
teardown_test),
cmocka_unit_test_setup_teardown(test_memcpy_zero_size, setup_test,
teardown_test),
cmocka_unit_test_setup_teardown(test_memcpy_buffer_part, setup_test,
teardown_test),
cmocka_unit_test_setup_teardown(test_memcpy_buffer_part_unaligned, setup_test,
teardown_test),
cmocka_unit_test_setup_teardown(test_memcpy_copy_to_itself, setup_test,
teardown_test),
cmocka_unit_test_setup_teardown(test_memcpy_copy_part_of_itself_to_itself,
setup_test, teardown_test),
};
return cb_run_group_tests(tests, NULL, NULL);
}
|
