Orit Wasserman | 21e3cd2 | 2013-01-31 09:12:16 +0200 | [diff] [blame] | 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 | } |