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qemu-e2k/tests/test-hbitmap.c
Wen Congyang c6a8c3283f util/hbitmap: Add an API to reset all set bits in hbitmap 
The function bdrv_clear_dirty_bitmap() is updated to use
faster hbitmap_reset_all() call.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 555E868A.60506@cn.fujitsu.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2015-06-23 15:06:16 +01:00

695 lines
21 KiB
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/*
* Hierarchical bitmap unit-tests.
*
* Copyright (C) 2012 Red Hat Inc.
*
* Author: Paolo Bonzini <pbonzini@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 <glib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include "qemu/hbitmap.h"
#define LOG_BITS_PER_LONG (BITS_PER_LONG == 32 ? 5 : 6)
#define L1 BITS_PER_LONG
#define L2 (BITS_PER_LONG * L1)
#define L3 (BITS_PER_LONG * L2)
typedef struct TestHBitmapData {
HBitmap *hb;
unsigned long *bits;
size_t size;
size_t old_size;
int granularity;
} TestHBitmapData;
/* Check that the HBitmap and the shadow bitmap contain the same data,
* ignoring the same "first" bits.
*/
static void hbitmap_test_check(TestHBitmapData *data,
uint64_t first)
{
uint64_t count = 0;
size_t pos;
int bit;
HBitmapIter hbi;
int64_t i, next;
hbitmap_iter_init(&hbi, data->hb, first);
i = first;
for (;;) {
next = hbitmap_iter_next(&hbi);
if (next < 0) {
next = data->size;
}
while (i < next) {
pos = i >> LOG_BITS_PER_LONG;
bit = i & (BITS_PER_LONG - 1);
i++;
g_assert_cmpint(data->bits[pos] & (1UL << bit), ==, 0);
}
if (next == data->size) {
break;
}
pos = i >> LOG_BITS_PER_LONG;
bit = i & (BITS_PER_LONG - 1);
i++;
count++;
g_assert_cmpint(data->bits[pos] & (1UL << bit), !=, 0);
}
if (first == 0) {
g_assert_cmpint(count << data->granularity, ==, hbitmap_count(data->hb));
}
}
/* This is provided instead of a test setup function so that the sizes
are kept in the test functions (and not in main()) */
static void hbitmap_test_init(TestHBitmapData *data,
uint64_t size, int granularity)
{
size_t n;
data->hb = hbitmap_alloc(size, granularity);
n = (size + BITS_PER_LONG - 1) / BITS_PER_LONG;
if (n == 0) {
n = 1;
}
data->bits = g_new0(unsigned long, n);
data->size = size;
data->granularity = granularity;
if (size) {
hbitmap_test_check(data, 0);
}
}
static inline size_t hbitmap_test_array_size(size_t bits)
{
size_t n = (bits + BITS_PER_LONG - 1) / BITS_PER_LONG;
return n ? n : 1;
}
static void hbitmap_test_truncate_impl(TestHBitmapData *data,
size_t size)
{
size_t n;
size_t m;
data->old_size = data->size;
data->size = size;
if (data->size == data->old_size) {
return;
}
n = hbitmap_test_array_size(size);
m = hbitmap_test_array_size(data->old_size);
data->bits = g_realloc(data->bits, sizeof(unsigned long) * n);
if (n > m) {
memset(&data->bits[m], 0x00, sizeof(unsigned long) * (n - m));
}
/* If we shrink to an uneven multiple of sizeof(unsigned long),
* scrub the leftover memory. */
if (data->size < data->old_size) {
m = size % (sizeof(unsigned long) * 8);
if (m) {
unsigned long mask = (1ULL << m) - 1;
data->bits[n-1] &= mask;
}
}
hbitmap_truncate(data->hb, size);
}
static void hbitmap_test_teardown(TestHBitmapData *data,
const void *unused)
{
if (data->hb) {
hbitmap_free(data->hb);
data->hb = NULL;
}
if (data->bits) {
g_free(data->bits);
data->bits = NULL;
}
}
/* Set a range in the HBitmap and in the shadow "simple" bitmap.
* The two bitmaps are then tested against each other.
*/
static void hbitmap_test_set(TestHBitmapData *data,
uint64_t first, uint64_t count)
{
hbitmap_set(data->hb, first, count);
while (count-- != 0) {
size_t pos = first >> LOG_BITS_PER_LONG;
int bit = first & (BITS_PER_LONG - 1);
first++;
data->bits[pos] |= 1UL << bit;
}
if (data->granularity == 0) {
hbitmap_test_check(data, 0);
}
}
/* Reset a range in the HBitmap and in the shadow "simple" bitmap.
*/
static void hbitmap_test_reset(TestHBitmapData *data,
uint64_t first, uint64_t count)
{
hbitmap_reset(data->hb, first, count);
while (count-- != 0) {
size_t pos = first >> LOG_BITS_PER_LONG;
int bit = first & (BITS_PER_LONG - 1);
first++;
data->bits[pos] &= ~(1UL << bit);
}
if (data->granularity == 0) {
hbitmap_test_check(data, 0);
}
}
static void hbitmap_test_reset_all(TestHBitmapData *data)
{
size_t n;
hbitmap_reset_all(data->hb);
n = (data->size + BITS_PER_LONG - 1) / BITS_PER_LONG;
if (n == 0) {
n = 1;
}
memset(data->bits, 0, n * sizeof(unsigned long));
if (data->granularity == 0) {
hbitmap_test_check(data, 0);
}
}
static void hbitmap_test_check_get(TestHBitmapData *data)
{
uint64_t count = 0;
uint64_t i;
for (i = 0; i < data->size; i++) {
size_t pos = i >> LOG_BITS_PER_LONG;
int bit = i & (BITS_PER_LONG - 1);
unsigned long val = data->bits[pos] & (1UL << bit);
count += hbitmap_get(data->hb, i);
g_assert_cmpint(hbitmap_get(data->hb, i), ==, val != 0);
}
g_assert_cmpint(count, ==, hbitmap_count(data->hb));
}
static void test_hbitmap_zero(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, 0, 0);
}
static void test_hbitmap_unaligned(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3 + 23, 0);
hbitmap_test_set(data, 0, 1);
hbitmap_test_set(data, L3 + 22, 1);
}
static void test_hbitmap_iter_empty(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L1, 0);
}
static void test_hbitmap_iter_partial(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3, 0);
hbitmap_test_set(data, 0, L3);
hbitmap_test_check(data, 1);
hbitmap_test_check(data, L1 - 1);
hbitmap_test_check(data, L1);
hbitmap_test_check(data, L1 * 2 - 1);
hbitmap_test_check(data, L2 - 1);
hbitmap_test_check(data, L2);
hbitmap_test_check(data, L2 + 1);
hbitmap_test_check(data, L2 + L1);
hbitmap_test_check(data, L2 + L1 * 2 - 1);
hbitmap_test_check(data, L2 * 2 - 1);
hbitmap_test_check(data, L2 * 2);
hbitmap_test_check(data, L2 * 2 + 1);
hbitmap_test_check(data, L2 * 2 + L1);
hbitmap_test_check(data, L2 * 2 + L1 * 2 - 1);
hbitmap_test_check(data, L3 / 2);
}
static void test_hbitmap_set_all(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3, 0);
hbitmap_test_set(data, 0, L3);
}
static void test_hbitmap_get_all(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3, 0);
hbitmap_test_set(data, 0, L3);
hbitmap_test_check_get(data);
}
static void test_hbitmap_get_some(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, 2 * L2, 0);
hbitmap_test_set(data, 10, 1);
hbitmap_test_check_get(data);
hbitmap_test_set(data, L1 - 1, 1);
hbitmap_test_check_get(data);
hbitmap_test_set(data, L1, 1);
hbitmap_test_check_get(data);
hbitmap_test_set(data, L2 - 1, 1);
hbitmap_test_check_get(data);
hbitmap_test_set(data, L2, 1);
hbitmap_test_check_get(data);
}
static void test_hbitmap_set_one(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, 2 * L2, 0);
hbitmap_test_set(data, 10, 1);
hbitmap_test_set(data, L1 - 1, 1);
hbitmap_test_set(data, L1, 1);
hbitmap_test_set(data, L2 - 1, 1);
hbitmap_test_set(data, L2, 1);
}
static void test_hbitmap_set_two_elem(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, 2 * L2, 0);
hbitmap_test_set(data, L1 - 1, 2);
hbitmap_test_set(data, L1 * 2 - 1, 4);
hbitmap_test_set(data, L1 * 4, L1 + 1);
hbitmap_test_set(data, L1 * 8 - 1, L1 + 1);
hbitmap_test_set(data, L2 - 1, 2);
hbitmap_test_set(data, L2 + L1 - 1, 8);
hbitmap_test_set(data, L2 + L1 * 4, L1 + 1);
hbitmap_test_set(data, L2 + L1 * 8 - 1, L1 + 1);
}
static void test_hbitmap_set(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3 * 2, 0);
hbitmap_test_set(data, L1 - 1, L1 + 2);
hbitmap_test_set(data, L1 * 3 - 1, L1 + 2);
hbitmap_test_set(data, L1 * 5, L1 * 2 + 1);
hbitmap_test_set(data, L1 * 8 - 1, L1 * 2 + 1);
hbitmap_test_set(data, L2 - 1, L1 + 2);
hbitmap_test_set(data, L2 + L1 * 2 - 1, L1 + 2);
hbitmap_test_set(data, L2 + L1 * 4, L1 * 2 + 1);
hbitmap_test_set(data, L2 + L1 * 7 - 1, L1 * 2 + 1);
hbitmap_test_set(data, L2 * 2 - 1, L3 * 2 - L2 * 2);
}
static void test_hbitmap_set_twice(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L1 * 3, 0);
hbitmap_test_set(data, 0, L1 * 3);
hbitmap_test_set(data, L1, 1);
}
static void test_hbitmap_set_overlap(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3 * 2, 0);
hbitmap_test_set(data, L1 - 1, L1 + 2);
hbitmap_test_set(data, L1 * 2 - 1, L1 * 2 + 2);
hbitmap_test_set(data, 0, L1 * 3);
hbitmap_test_set(data, L1 * 8 - 1, L2);
hbitmap_test_set(data, L2, L1);
hbitmap_test_set(data, L2 - L1 - 1, L1 * 8 + 2);
hbitmap_test_set(data, L2, L3 - L2 + 1);
hbitmap_test_set(data, L3 - L1, L1 * 3);
hbitmap_test_set(data, L3 - 1, 3);
hbitmap_test_set(data, L3 - 1, L2);
}
static void test_hbitmap_reset_empty(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3, 0);
hbitmap_test_reset(data, 0, L3);
}
static void test_hbitmap_reset(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3 * 2, 0);
hbitmap_test_set(data, L1 - 1, L1 + 2);
hbitmap_test_reset(data, L1 * 2 - 1, L1 * 2 + 2);
hbitmap_test_set(data, 0, L1 * 3);
hbitmap_test_reset(data, L1 * 8 - 1, L2);
hbitmap_test_set(data, L2, L1);
hbitmap_test_reset(data, L2 - L1 - 1, L1 * 8 + 2);
hbitmap_test_set(data, L2, L3 - L2 + 1);
hbitmap_test_reset(data, L3 - L1, L1 * 3);
hbitmap_test_set(data, L3 - 1, 3);
hbitmap_test_reset(data, L3 - 1, L2);
hbitmap_test_set(data, 0, L3 * 2);
hbitmap_test_reset(data, 0, L1);
hbitmap_test_reset(data, 0, L2);
hbitmap_test_reset(data, L3, L3);
hbitmap_test_set(data, L3 / 2, L3);
}
static void test_hbitmap_reset_all(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_init(data, L3 * 2, 0);
hbitmap_test_set(data, L1 - 1, L1 + 2);
hbitmap_test_reset_all(data);
hbitmap_test_set(data, 0, L1 * 3);
hbitmap_test_reset_all(data);
hbitmap_test_set(data, L2, L1);
hbitmap_test_reset_all(data);
hbitmap_test_set(data, L2, L3 - L2 + 1);
hbitmap_test_reset_all(data);
hbitmap_test_set(data, L3 - 1, 3);
hbitmap_test_reset_all(data);
hbitmap_test_set(data, 0, L3 * 2);
hbitmap_test_reset_all(data);
hbitmap_test_set(data, L3 / 2, L3);
hbitmap_test_reset_all(data);
}
static void test_hbitmap_granularity(TestHBitmapData *data,
const void *unused)
{
/* Note that hbitmap_test_check has to be invoked manually in this test. */
hbitmap_test_init(data, L1, 1);
hbitmap_test_set(data, 0, 1);
g_assert_cmpint(hbitmap_count(data->hb), ==, 2);
hbitmap_test_check(data, 0);
hbitmap_test_set(data, 2, 1);
g_assert_cmpint(hbitmap_count(data->hb), ==, 4);
hbitmap_test_check(data, 0);
hbitmap_test_set(data, 0, 3);
g_assert_cmpint(hbitmap_count(data->hb), ==, 4);
hbitmap_test_reset(data, 0, 1);
g_assert_cmpint(hbitmap_count(data->hb), ==, 2);
}
static void test_hbitmap_iter_granularity(TestHBitmapData *data,
const void *unused)
{
HBitmapIter hbi;
/* Note that hbitmap_test_check has to be invoked manually in this test. */
hbitmap_test_init(data, 131072 << 7, 7);
hbitmap_iter_init(&hbi, data->hb, 0);
g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_test_set(data, ((L2 + L1 + 1) << 7) + 8, 8);
hbitmap_iter_init(&hbi, data->hb, 0);
g_assert_cmpint(hbitmap_iter_next(&hbi), ==, (L2 + L1 + 1) << 7);
g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_iter_init(&hbi, data->hb, (L2 + L1 + 2) << 7);
g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_test_set(data, (131072 << 7) - 8, 8);
hbitmap_iter_init(&hbi, data->hb, 0);
g_assert_cmpint(hbitmap_iter_next(&hbi), ==, (L2 + L1 + 1) << 7);
g_assert_cmpint(hbitmap_iter_next(&hbi), ==, 131071 << 7);
g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
hbitmap_iter_init(&hbi, data->hb, (L2 + L1 + 2) << 7);
g_assert_cmpint(hbitmap_iter_next(&hbi), ==, 131071 << 7);
g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0);
}
static void hbitmap_test_set_boundary_bits(TestHBitmapData *data, ssize_t diff)
{
size_t size = data->size;
/* First bit */
hbitmap_test_set(data, 0, 1);
if (diff < 0) {
/* Last bit in new, shortened map */
hbitmap_test_set(data, size + diff - 1, 1);
/* First bit to be truncated away */
hbitmap_test_set(data, size + diff, 1);
}
/* Last bit */
hbitmap_test_set(data, size - 1, 1);
if (data->granularity == 0) {
hbitmap_test_check_get(data);
}
}
static void hbitmap_test_check_boundary_bits(TestHBitmapData *data)
{
size_t size = MIN(data->size, data->old_size);
if (data->granularity == 0) {
hbitmap_test_check_get(data);
hbitmap_test_check(data, 0);
} else {
/* If a granularity was set, note that every distinct
* (bit >> granularity) value that was set will increase
* the bit pop count by 2^granularity, not just 1.
*
* The hbitmap_test_check facility does not currently tolerate
* non-zero granularities, so test the boundaries and the population
* count manually.
*/
g_assert(hbitmap_get(data->hb, 0));
g_assert(hbitmap_get(data->hb, size - 1));
g_assert_cmpint(2 << data->granularity, ==, hbitmap_count(data->hb));
}
}
/* Generic truncate test. */
static void hbitmap_test_truncate(TestHBitmapData *data,
size_t size,
ssize_t diff,
int granularity)
{
hbitmap_test_init(data, size, granularity);
hbitmap_test_set_boundary_bits(data, diff);
hbitmap_test_truncate_impl(data, size + diff);
hbitmap_test_check_boundary_bits(data);
}
static void test_hbitmap_truncate_nop(TestHBitmapData *data,
const void *unused)
{
hbitmap_test_truncate(data, L2, 0, 0);
}
/**
* Grow by an amount smaller than the granularity, without crossing
* a granularity alignment boundary. Effectively a NOP.
*/
static void test_hbitmap_truncate_grow_negligible(TestHBitmapData *data,
const void *unused)
{
size_t size = L2 - 1;
size_t diff = 1;
int granularity = 1;
hbitmap_test_truncate(data, size, diff, granularity);
}
/**
* Shrink by an amount smaller than the granularity, without crossing
* a granularity alignment boundary. Effectively a NOP.
*/
static void test_hbitmap_truncate_shrink_negligible(TestHBitmapData *data,
const void *unused)
{
size_t size = L2;
ssize_t diff = -1;
int granularity = 1;
hbitmap_test_truncate(data, size, diff, granularity);
}
/**
* Grow by an amount smaller than the granularity, but crossing over
* a granularity alignment boundary.
*/
static void test_hbitmap_truncate_grow_tiny(TestHBitmapData *data,
const void *unused)
{
size_t size = L2 - 2;
ssize_t diff = 1;
int granularity = 1;
hbitmap_test_truncate(data, size, diff, granularity);
}
/**
* Shrink by an amount smaller than the granularity, but crossing over
* a granularity alignment boundary.
*/
static void test_hbitmap_truncate_shrink_tiny(TestHBitmapData *data,
const void *unused)
{
size_t size = L2 - 1;
ssize_t diff = -1;
int granularity = 1;
hbitmap_test_truncate(data, size, diff, granularity);
}
/**
* Grow by an amount smaller than sizeof(long), and not crossing over
* a sizeof(long) alignment boundary.
*/
static void test_hbitmap_truncate_grow_small(TestHBitmapData *data,
const void *unused)
{
size_t size = L2 + 1;
size_t diff = sizeof(long) / 2;
hbitmap_test_truncate(data, size, diff, 0);
}
/**
* Shrink by an amount smaller than sizeof(long), and not crossing over
* a sizeof(long) alignment boundary.
*/
static void test_hbitmap_truncate_shrink_small(TestHBitmapData *data,
const void *unused)
{
size_t size = L2;
size_t diff = sizeof(long) / 2;
hbitmap_test_truncate(data, size, -diff, 0);
}
/**
* Grow by an amount smaller than sizeof(long), while crossing over
* a sizeof(long) alignment boundary.
*/
static void test_hbitmap_truncate_grow_medium(TestHBitmapData *data,
const void *unused)
{
size_t size = L2 - 1;
size_t diff = sizeof(long) / 2;
hbitmap_test_truncate(data, size, diff, 0);
}
/**
* Shrink by an amount smaller than sizeof(long), while crossing over
* a sizeof(long) alignment boundary.
*/
static void test_hbitmap_truncate_shrink_medium(TestHBitmapData *data,
const void *unused)
{
size_t size = L2 + 1;
size_t diff = sizeof(long) / 2;
hbitmap_test_truncate(data, size, -diff, 0);
}
/**
* Grow by an amount larger than sizeof(long).
*/
static void test_hbitmap_truncate_grow_large(TestHBitmapData *data,
const void *unused)
{
size_t size = L2;
size_t diff = 8 * sizeof(long);
hbitmap_test_truncate(data, size, diff, 0);
}
/**
* Shrink by an amount larger than sizeof(long).
*/
static void test_hbitmap_truncate_shrink_large(TestHBitmapData *data,
const void *unused)
{
size_t size = L2;
size_t diff = 8 * sizeof(long);
hbitmap_test_truncate(data, size, -diff, 0);
}
static void hbitmap_test_add(const char *testpath,
void (*test_func)(TestHBitmapData *data, const void *user_data))
{
g_test_add(testpath, TestHBitmapData, NULL, NULL, test_func,
hbitmap_test_teardown);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
hbitmap_test_add("/hbitmap/size/0", test_hbitmap_zero);
hbitmap_test_add("/hbitmap/size/unaligned", test_hbitmap_unaligned);
hbitmap_test_add("/hbitmap/iter/empty", test_hbitmap_iter_empty);
hbitmap_test_add("/hbitmap/iter/partial", test_hbitmap_iter_partial);
hbitmap_test_add("/hbitmap/iter/granularity", test_hbitmap_iter_granularity);
hbitmap_test_add("/hbitmap/get/all", test_hbitmap_get_all);
hbitmap_test_add("/hbitmap/get/some", test_hbitmap_get_some);
hbitmap_test_add("/hbitmap/set/all", test_hbitmap_set_all);
hbitmap_test_add("/hbitmap/set/one", test_hbitmap_set_one);
hbitmap_test_add("/hbitmap/set/two-elem", test_hbitmap_set_two_elem);
hbitmap_test_add("/hbitmap/set/general", test_hbitmap_set);
hbitmap_test_add("/hbitmap/set/twice", test_hbitmap_set_twice);
hbitmap_test_add("/hbitmap/set/overlap", test_hbitmap_set_overlap);
hbitmap_test_add("/hbitmap/reset/empty", test_hbitmap_reset_empty);
hbitmap_test_add("/hbitmap/reset/general", test_hbitmap_reset);
hbitmap_test_add("/hbitmap/reset/all", test_hbitmap_reset_all);
hbitmap_test_add("/hbitmap/granularity", test_hbitmap_granularity);
hbitmap_test_add("/hbitmap/truncate/nop", test_hbitmap_truncate_nop);
hbitmap_test_add("/hbitmap/truncate/grow/negligible",
test_hbitmap_truncate_grow_negligible);
hbitmap_test_add("/hbitmap/truncate/shrink/negligible",
test_hbitmap_truncate_shrink_negligible);
hbitmap_test_add("/hbitmap/truncate/grow/tiny",
test_hbitmap_truncate_grow_tiny);
hbitmap_test_add("/hbitmap/truncate/shrink/tiny",
test_hbitmap_truncate_shrink_tiny);
hbitmap_test_add("/hbitmap/truncate/grow/small",
test_hbitmap_truncate_grow_small);
hbitmap_test_add("/hbitmap/truncate/shrink/small",
test_hbitmap_truncate_shrink_small);
hbitmap_test_add("/hbitmap/truncate/grow/medium",
test_hbitmap_truncate_grow_medium);
hbitmap_test_add("/hbitmap/truncate/shrink/medium",
test_hbitmap_truncate_shrink_medium);
hbitmap_test_add("/hbitmap/truncate/grow/large",
test_hbitmap_truncate_grow_large);
hbitmap_test_add("/hbitmap/truncate/shrink/large",
test_hbitmap_truncate_shrink_large);
g_test_run();
return 0;
}
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