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Diffstat (limited to 'tests/test-xbzrle.c')
| -rw-r--r-- | tests/test-xbzrle.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/tests/test-xbzrle.c b/tests/test-xbzrle.c new file mode 100644 index 0000000000..db93b0a3d2 --- /dev/null +++ b/tests/test-xbzrle.c @@ -0,0 +1,196 @@ +/* + * Xor Based Zero Run Length Encoding unit tests. + * + * Copyright 2013 Red Hat, Inc. and/or its affiliates + * + * Authors: + * Orit Wasserman <owasserm@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <strings.h> +#include <string.h> +#include <sys/time.h> +#include <assert.h> +#include "qemu-common.h" +#include "include/migration/migration.h" + +#define PAGE_SIZE 4096 + +static void test_uleb(void) +{ + uint32_t i, val; + uint8_t buf[2]; + int encode_ret, decode_ret; + + for (i = 0; i <= 0x3fff; i++) { + encode_ret = uleb128_encode_small(&buf[0], i); + decode_ret = uleb128_decode_small(&buf[0], &val); + g_assert(encode_ret == decode_ret); + g_assert(i == val); + } + + /* decode invalid value */ + buf[0] = 0x80; + buf[1] = 0x80; + + decode_ret = uleb128_decode_small(&buf[0], &val); + g_assert(decode_ret == -1); + g_assert(val == 0); +} + +static void test_encode_decode_zero(void) +{ + uint8_t *buffer = g_malloc0(PAGE_SIZE); + uint8_t *compressed = g_malloc0(PAGE_SIZE); + int i = 0; + int dlen = 0; + int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006); + + for (i = diff_len; i > 0; i--) { + buffer[1000 + i] = i; + } + + buffer[1000 + diff_len + 3] = 103; + buffer[1000 + diff_len + 5] = 105; + + /* encode zero page */ + dlen = xbzrle_encode_buffer(buffer, buffer, PAGE_SIZE, compressed, + PAGE_SIZE); + g_assert(dlen == 0); + + g_free(buffer); + g_free(compressed); +} + +static void test_encode_decode_unchanged(void) +{ + uint8_t *compressed = g_malloc0(PAGE_SIZE); + uint8_t *test = g_malloc0(PAGE_SIZE); + int i = 0; + int dlen = 0; + int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006); + + for (i = diff_len; i > 0; i--) { + test[1000 + i] = i + 4; + } + + test[1000 + diff_len + 3] = 107; + test[1000 + diff_len + 5] = 109; + + /* test unchanged buffer */ + dlen = xbzrle_encode_buffer(test, test, PAGE_SIZE, compressed, + PAGE_SIZE); + g_assert(dlen == 0); + + g_free(test); + g_free(compressed); +} + +static void test_encode_decode_1_byte(void) +{ + uint8_t *buffer = g_malloc0(PAGE_SIZE); + uint8_t *test = g_malloc0(PAGE_SIZE); + uint8_t *compressed = g_malloc(PAGE_SIZE); + int dlen = 0, rc = 0; + uint8_t buf[2]; + + test[PAGE_SIZE - 1] = 1; + + dlen = xbzrle_encode_buffer(buffer, test, PAGE_SIZE, compressed, + PAGE_SIZE); + g_assert(dlen == (uleb128_encode_small(&buf[0], 4095) + 2)); + + rc = xbzrle_decode_buffer(compressed, dlen, buffer, PAGE_SIZE); + g_assert(rc == PAGE_SIZE); + g_assert(memcmp(test, buffer, PAGE_SIZE) == 0); + + g_free(buffer); + g_free(compressed); + g_free(test); +} + +static void test_encode_decode_overflow(void) +{ + uint8_t *compressed = g_malloc0(PAGE_SIZE); + uint8_t *test = g_malloc0(PAGE_SIZE); + uint8_t *buffer = g_malloc0(PAGE_SIZE); + int i = 0, rc = 0; + + for (i = 0; i < PAGE_SIZE / 2 - 1; i++) { + test[i * 2] = 1; + } + + /* encode overflow */ + rc = xbzrle_encode_buffer(buffer, test, PAGE_SIZE, compressed, + PAGE_SIZE); + g_assert(rc == -1); + + g_free(buffer); + g_free(compressed); + g_free(test); +} + +static void encode_decode_range(void) +{ + uint8_t *buffer = g_malloc0(PAGE_SIZE); + uint8_t *compressed = g_malloc(PAGE_SIZE); + uint8_t *test = g_malloc0(PAGE_SIZE); + int i = 0, rc = 0; + int dlen = 0; + + int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006); + + for (i = diff_len; i > 0; i--) { + buffer[1000 + i] = i; + test[1000 + i] = i + 4; + } + + buffer[1000 + diff_len + 3] = 103; + test[1000 + diff_len + 3] = 107; + + buffer[1000 + diff_len + 5] = 105; + test[1000 + diff_len + 5] = 109; + + /* test encode/decode */ + dlen = xbzrle_encode_buffer(test, buffer, PAGE_SIZE, compressed, + PAGE_SIZE); + + rc = xbzrle_decode_buffer(compressed, dlen, test, PAGE_SIZE); + g_assert(rc < PAGE_SIZE); + g_assert(memcmp(test, buffer, PAGE_SIZE) == 0); + + g_free(buffer); + g_free(compressed); + g_free(test); +} + +static void test_encode_decode(void) +{ + int i; + + for (i = 0; i < 10000; i++) { + encode_decode_range(); + } +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + g_test_rand_int(); + g_test_add_func("/xbzrle/uleb", test_uleb); + g_test_add_func("/xbzrle/encode_decode_zero", test_encode_decode_zero); + g_test_add_func("/xbzrle/encode_decode_unchanged", + test_encode_decode_unchanged); + g_test_add_func("/xbzrle/encode_decode_1_byte", test_encode_decode_1_byte); + g_test_add_func("/xbzrle/encode_decode_overflow", + test_encode_decode_overflow); + g_test_add_func("/xbzrle/encode_decode", test_encode_decode); + + return g_test_run(); +} |