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![Juan Quintela](/assets/img/avatar_default.png)
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com>
192 lines
4.8 KiB
C
192 lines
4.8 KiB
C
/*
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* Xor Based Zero Run Length Encoding unit tests.
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*
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* Copyright 2013 Red Hat, Inc. and/or its affiliates
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*
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* Authors:
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* Orit Wasserman <owasserm@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qemu/cutils.h"
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#include "../migration/xbzrle.h"
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#define PAGE_SIZE 4096
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static void test_uleb(void)
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{
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uint32_t i, val;
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uint8_t buf[2];
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int encode_ret, decode_ret;
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for (i = 0; i <= 0x3fff; i++) {
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encode_ret = uleb128_encode_small(&buf[0], i);
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decode_ret = uleb128_decode_small(&buf[0], &val);
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g_assert(encode_ret == decode_ret);
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g_assert(i == val);
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}
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/* decode invalid value */
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buf[0] = 0x80;
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buf[1] = 0x80;
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decode_ret = uleb128_decode_small(&buf[0], &val);
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g_assert(decode_ret == -1);
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g_assert(val == 0);
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}
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static void test_encode_decode_zero(void)
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{
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uint8_t *buffer = g_malloc0(PAGE_SIZE);
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uint8_t *compressed = g_malloc0(PAGE_SIZE);
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int i = 0;
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int dlen = 0;
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int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006);
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for (i = diff_len; i > 0; i--) {
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buffer[1000 + i] = i;
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}
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buffer[1000 + diff_len + 3] = 103;
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buffer[1000 + diff_len + 5] = 105;
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/* encode zero page */
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dlen = xbzrle_encode_buffer(buffer, buffer, PAGE_SIZE, compressed,
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PAGE_SIZE);
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g_assert(dlen == 0);
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g_free(buffer);
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g_free(compressed);
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}
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static void test_encode_decode_unchanged(void)
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{
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uint8_t *compressed = g_malloc0(PAGE_SIZE);
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uint8_t *test = g_malloc0(PAGE_SIZE);
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int i = 0;
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int dlen = 0;
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int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006);
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for (i = diff_len; i > 0; i--) {
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test[1000 + i] = i + 4;
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}
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test[1000 + diff_len + 3] = 107;
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test[1000 + diff_len + 5] = 109;
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/* test unchanged buffer */
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dlen = xbzrle_encode_buffer(test, test, PAGE_SIZE, compressed,
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PAGE_SIZE);
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g_assert(dlen == 0);
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g_free(test);
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g_free(compressed);
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}
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static void test_encode_decode_1_byte(void)
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{
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uint8_t *buffer = g_malloc0(PAGE_SIZE);
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uint8_t *test = g_malloc0(PAGE_SIZE);
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uint8_t *compressed = g_malloc(PAGE_SIZE);
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int dlen = 0, rc = 0;
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uint8_t buf[2];
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test[PAGE_SIZE - 1] = 1;
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dlen = xbzrle_encode_buffer(buffer, test, PAGE_SIZE, compressed,
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PAGE_SIZE);
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g_assert(dlen == (uleb128_encode_small(&buf[0], 4095) + 2));
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rc = xbzrle_decode_buffer(compressed, dlen, buffer, PAGE_SIZE);
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g_assert(rc == PAGE_SIZE);
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g_assert(memcmp(test, buffer, PAGE_SIZE) == 0);
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g_free(buffer);
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g_free(compressed);
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g_free(test);
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}
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static void test_encode_decode_overflow(void)
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{
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uint8_t *compressed = g_malloc0(PAGE_SIZE);
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uint8_t *test = g_malloc0(PAGE_SIZE);
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uint8_t *buffer = g_malloc0(PAGE_SIZE);
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int i = 0, rc = 0;
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for (i = 0; i < PAGE_SIZE / 2 - 1; i++) {
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test[i * 2] = 1;
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}
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/* encode overflow */
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rc = xbzrle_encode_buffer(buffer, test, PAGE_SIZE, compressed,
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PAGE_SIZE);
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g_assert(rc == -1);
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g_free(buffer);
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g_free(compressed);
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g_free(test);
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}
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static void encode_decode_range(void)
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{
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uint8_t *buffer = g_malloc0(PAGE_SIZE);
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uint8_t *compressed = g_malloc(PAGE_SIZE);
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uint8_t *test = g_malloc0(PAGE_SIZE);
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int i = 0, rc = 0;
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int dlen = 0;
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int diff_len = g_test_rand_int_range(0, PAGE_SIZE - 1006);
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for (i = diff_len; i > 0; i--) {
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buffer[1000 + i] = i;
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test[1000 + i] = i + 4;
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}
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buffer[1000 + diff_len + 3] = 103;
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test[1000 + diff_len + 3] = 107;
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buffer[1000 + diff_len + 5] = 105;
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test[1000 + diff_len + 5] = 109;
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/* test encode/decode */
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dlen = xbzrle_encode_buffer(test, buffer, PAGE_SIZE, compressed,
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PAGE_SIZE);
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rc = xbzrle_decode_buffer(compressed, dlen, test, PAGE_SIZE);
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g_assert(rc < PAGE_SIZE);
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g_assert(memcmp(test, buffer, PAGE_SIZE) == 0);
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g_free(buffer);
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g_free(compressed);
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g_free(test);
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}
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static void test_encode_decode(void)
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{
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int i;
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for (i = 0; i < 10000; i++) {
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encode_decode_range();
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}
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}
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int main(int argc, char **argv)
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{
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g_test_init(&argc, &argv, NULL);
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g_test_rand_int();
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g_test_add_func("/xbzrle/uleb", test_uleb);
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g_test_add_func("/xbzrle/encode_decode_zero", test_encode_decode_zero);
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g_test_add_func("/xbzrle/encode_decode_unchanged",
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test_encode_decode_unchanged);
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g_test_add_func("/xbzrle/encode_decode_1_byte", test_encode_decode_1_byte);
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g_test_add_func("/xbzrle/encode_decode_overflow",
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test_encode_decode_overflow);
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g_test_add_func("/xbzrle/encode_decode", test_encode_decode);
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return g_test_run();
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}
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