]>
Commit | Line | Data |
---|---|---|
21e3cd29 OW |
1 | /* |
2 | * Xor Based Zero Run Length Encoding unit tests. | |
3 | * | |
4 | * Copyright 2013 Red Hat, Inc. and/or its affiliates | |
5 | * | |
6 | * Authors: | |
7 | * Orit Wasserman <owasserm@redhat.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | #include <stdint.h> | |
14 | #include <stdio.h> | |
15 | #include <stdlib.h> | |
16 | #include <strings.h> | |
17 | #include <string.h> | |
18 | #include <sys/time.h> | |
19 | #include <assert.h> | |
20 | #include "qemu-common.h" | |
21 | #include "include/migration/migration.h" | |
22 | ||
23 | #define PAGE_SIZE 4096 | |
24 | ||
25 | static void test_uleb(void) | |
26 | { | |
27 | uint32_t i, val; | |
28 | uint8_t buf[2]; | |
29 | int encode_ret, decode_ret; | |
30 | ||
31 | for (i = 0; i <= 0x3fff; i++) { | |
32 | encode_ret = uleb128_encode_small(&buf[0], i); | |
33 | decode_ret = uleb128_decode_small(&buf[0], &val); | |
34 | g_assert(encode_ret == decode_ret); | |
35 | g_assert(i == val); | |
36 | } | |
37 | ||
38 | /* decode invalid value */ | |
39 | buf[0] = 0x80; | |
40 | buf[1] = 0x80; | |
41 | ||
42 | decode_ret = uleb128_decode_small(&buf[0], &val); | |
43 | g_assert(decode_ret == -1); | |
44 | g_assert(val == 0); | |
45 | } | |
46 | ||
47 | static void test_encode_decode_zero(void) | |
48 | { | |
49 | uint8_t *buffer = g_malloc0(PAGE_SIZE); | |
50 | uint8_t *compressed = g_malloc0(PAGE_SIZE); | |
51 | int i = 0; | |
52 | int dlen = 0; | |
53 | int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006); | |
54 | ||
55 | for (i = diff_len; i > 0; i--) { | |
56 | buffer[1000 + i] = i; | |
57 | } | |
58 | ||
59 | buffer[1000 + diff_len + 3] = 103; | |
60 | buffer[1000 + diff_len + 5] = 105; | |
61 | ||
62 | /* encode zero page */ | |
63 | dlen = xbzrle_encode_buffer(buffer, buffer, PAGE_SIZE, compressed, | |
64 | PAGE_SIZE); | |
65 | g_assert(dlen == 0); | |
66 | ||
67 | g_free(buffer); | |
68 | g_free(compressed); | |
69 | } | |
70 | ||
71 | static void test_encode_decode_unchanged(void) | |
72 | { | |
73 | uint8_t *compressed = g_malloc0(PAGE_SIZE); | |
74 | uint8_t *test = g_malloc0(PAGE_SIZE); | |
75 | int i = 0; | |
76 | int dlen = 0; | |
77 | int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006); | |
78 | ||
79 | for (i = diff_len; i > 0; i--) { | |
80 | test[1000 + i] = i + 4; | |
81 | } | |
82 | ||
83 | test[1000 + diff_len + 3] = 107; | |
84 | test[1000 + diff_len + 5] = 109; | |
85 | ||
86 | /* test unchanged buffer */ | |
87 | dlen = xbzrle_encode_buffer(test, test, PAGE_SIZE, compressed, | |
88 | PAGE_SIZE); | |
89 | g_assert(dlen == 0); | |
90 | ||
91 | g_free(test); | |
92 | g_free(compressed); | |
93 | } | |
94 | ||
95 | static void test_encode_decode_1_byte(void) | |
96 | { | |
97 | uint8_t *buffer = g_malloc0(PAGE_SIZE); | |
98 | uint8_t *test = g_malloc0(PAGE_SIZE); | |
99 | uint8_t *compressed = g_malloc(PAGE_SIZE); | |
100 | int dlen = 0, rc = 0; | |
101 | uint8_t buf[2]; | |
102 | ||
103 | test[PAGE_SIZE - 1] = 1; | |
104 | ||
105 | dlen = xbzrle_encode_buffer(buffer, test, PAGE_SIZE, compressed, | |
106 | PAGE_SIZE); | |
107 | g_assert(dlen == (uleb128_encode_small(&buf[0], 4095) + 2)); | |
108 | ||
109 | rc = xbzrle_decode_buffer(compressed, dlen, buffer, PAGE_SIZE); | |
110 | g_assert(rc == PAGE_SIZE); | |
111 | g_assert(memcmp(test, buffer, PAGE_SIZE) == 0); | |
112 | ||
113 | g_free(buffer); | |
114 | g_free(compressed); | |
115 | g_free(test); | |
116 | } | |
117 | ||
118 | static void test_encode_decode_overflow(void) | |
119 | { | |
120 | uint8_t *compressed = g_malloc0(PAGE_SIZE); | |
121 | uint8_t *test = g_malloc0(PAGE_SIZE); | |
122 | uint8_t *buffer = g_malloc0(PAGE_SIZE); | |
123 | int i = 0, rc = 0; | |
124 | ||
125 | for (i = 0; i < PAGE_SIZE / 2 - 1; i++) { | |
126 | test[i * 2] = 1; | |
127 | } | |
128 | ||
129 | /* encode overflow */ | |
130 | rc = xbzrle_encode_buffer(buffer, test, PAGE_SIZE, compressed, | |
131 | PAGE_SIZE); | |
132 | g_assert(rc == -1); | |
133 | ||
134 | g_free(buffer); | |
135 | g_free(compressed); | |
136 | g_free(test); | |
137 | } | |
138 | ||
139 | static void encode_decode_range(void) | |
140 | { | |
141 | uint8_t *buffer = g_malloc0(PAGE_SIZE); | |
142 | uint8_t *compressed = g_malloc(PAGE_SIZE); | |
143 | uint8_t *test = g_malloc0(PAGE_SIZE); | |
144 | int i = 0, rc = 0; | |
145 | int dlen = 0; | |
146 | ||
147 | int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006); | |
148 | ||
149 | for (i = diff_len; i > 0; i--) { | |
150 | buffer[1000 + i] = i; | |
151 | test[1000 + i] = i + 4; | |
152 | } | |
153 | ||
154 | buffer[1000 + diff_len + 3] = 103; | |
155 | test[1000 + diff_len + 3] = 107; | |
156 | ||
157 | buffer[1000 + diff_len + 5] = 105; | |
158 | test[1000 + diff_len + 5] = 109; | |
159 | ||
160 | /* test encode/decode */ | |
161 | dlen = xbzrle_encode_buffer(test, buffer, PAGE_SIZE, compressed, | |
162 | PAGE_SIZE); | |
163 | ||
164 | rc = xbzrle_decode_buffer(compressed, dlen, test, PAGE_SIZE); | |
165 | g_assert(rc < PAGE_SIZE); | |
166 | g_assert(memcmp(test, buffer, PAGE_SIZE) == 0); | |
167 | ||
168 | g_free(buffer); | |
169 | g_free(compressed); | |
170 | g_free(test); | |
171 | } | |
172 | ||
173 | static void test_encode_decode(void) | |
174 | { | |
175 | int i; | |
176 | ||
177 | for (i = 0; i < 10000; i++) { | |
178 | encode_decode_range(); | |
179 | } | |
180 | } | |
181 | ||
182 | int main(int argc, char **argv) | |
183 | { | |
184 | g_test_init(&argc, &argv, NULL); | |
185 | g_test_rand_int(); | |
186 | g_test_add_func("/xbzrle/uleb", test_uleb); | |
187 | g_test_add_func("/xbzrle/encode_decode_zero", test_encode_decode_zero); | |
188 | g_test_add_func("/xbzrle/encode_decode_unchanged", | |
189 | test_encode_decode_unchanged); | |
190 | g_test_add_func("/xbzrle/encode_decode_1_byte", test_encode_decode_1_byte); | |
191 | g_test_add_func("/xbzrle/encode_decode_overflow", | |
192 | test_encode_decode_overflow); | |
193 | g_test_add_func("/xbzrle/encode_decode", test_encode_decode); | |
194 | ||
195 | return g_test_run(); | |
196 | } |