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/*
* 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 "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/cutils.h"
#include "../migration/xbzrle.h"
#define XBZRLE_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(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0;
int dlen = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_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, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
g_assert(dlen == 0);
g_free(buffer);
g_free(compressed);
}
static void test_encode_decode_unchanged(void)
{
uint8_t *compressed = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0;
int dlen = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_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, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_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(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc(XBZRLE_PAGE_SIZE);
int dlen = 0, rc = 0;
uint8_t buf[2];
test[XBZRLE_PAGE_SIZE - 1] = 1;
dlen = xbzrle_encode_buffer(buffer, test, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
g_assert(dlen == (uleb128_encode_small(&buf[0], 4095) + 2));
rc = xbzrle_decode_buffer(compressed, dlen, buffer, XBZRLE_PAGE_SIZE);
g_assert(rc == XBZRLE_PAGE_SIZE);
g_assert(memcmp(test, buffer, XBZRLE_PAGE_SIZE) == 0);
g_free(buffer);
g_free(compressed);
g_free(test);
}
static void test_encode_decode_overflow(void)
{
uint8_t *compressed = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
uint8_t *buffer = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0, rc = 0;
for (i = 0; i < XBZRLE_PAGE_SIZE / 2 - 1; i++) {
test[i * 2] = 1;
}
/* encode overflow */
rc = xbzrle_encode_buffer(buffer, test, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_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(XBZRLE_PAGE_SIZE);
uint8_t *compressed = g_malloc(XBZRLE_PAGE_SIZE);
uint8_t *test = g_malloc0(XBZRLE_PAGE_SIZE);
int i = 0, rc = 0;
int dlen = 0;
int diff_len = g_test_rand_int_range(0, XBZRLE_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, XBZRLE_PAGE_SIZE, compressed,
XBZRLE_PAGE_SIZE);
rc = xbzrle_decode_buffer(compressed, dlen, test, XBZRLE_PAGE_SIZE);
g_assert(rc < XBZRLE_PAGE_SIZE);
g_assert(memcmp(test, buffer, XBZRLE_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();
}
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