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qemu/tests/test-vmstate.c

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/*
* Test code for VMState
*
* Copyright (c) 2013 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "migration/migration.h"
#include "migration/vmstate.h"
#include "qemu/coroutine.h"
#include "io/channel-file.h"
static char temp_file[] = "/tmp/vmst.test.XXXXXX";
static int temp_fd;
/* Fake yield_until_fd_readable() implementation so we don't have to pull the
* coroutine code as dependency.
*/
void yield_until_fd_readable(int fd)
{
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd, &fds);
select(fd + 1, &fds, NULL, NULL, NULL);
}
/* Duplicate temp_fd and seek to the beginning of the file */
static QEMUFile *open_test_file(bool write)
{
int fd = dup(temp_fd);
QIOChannel *ioc;
QEMUFile *f;
lseek(fd, 0, SEEK_SET);
if (write) {
g_assert_cmpint(ftruncate(fd, 0), ==, 0);
}
ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
if (write) {
f = qemu_fopen_channel_output(ioc);
} else {
f = qemu_fopen_channel_input(ioc);
}
object_unref(OBJECT(ioc));
return f;
}
#define SUCCESS(val) \
g_assert_cmpint((val), ==, 0)
#define FAILURE(val) \
g_assert_cmpint((val), !=, 0)
static void save_vmstate(const VMStateDescription *desc, void *obj)
{
QEMUFile *f = open_test_file(true);
/* Save file with vmstate */
vmstate_save_state(f, desc, obj, NULL);
qemu_put_byte(f, QEMU_VM_EOF);
g_assert(!qemu_file_get_error(f));
qemu_fclose(f);
}
static void save_buffer(const uint8_t *buf, size_t buf_size)
{
QEMUFile *fsave = open_test_file(true);
qemu_put_buffer(fsave, buf, buf_size);
qemu_fclose(fsave);
}
static void compare_vmstate(uint8_t *wire, size_t size)
{
QEMUFile *f = open_test_file(false);
uint8_t result[size];
/* read back as binary */
g_assert_cmpint(qemu_get_buffer(f, result, sizeof(result)), ==,
sizeof(result));
g_assert(!qemu_file_get_error(f));
/* Compare that what is on the file is the same that what we
expected to be there */
SUCCESS(memcmp(result, wire, sizeof(result)));
/* Must reach EOF */
qemu_get_byte(f);
g_assert_cmpint(qemu_file_get_error(f), ==, -EIO);
qemu_fclose(f);
}
static int load_vmstate_one(const VMStateDescription *desc, void *obj,
int version, uint8_t *wire, size_t size)
{
QEMUFile *f;
int ret;
f = open_test_file(true);
qemu_put_buffer(f, wire, size);
qemu_fclose(f);
f = open_test_file(false);
ret = vmstate_load_state(f, desc, obj, version);
if (ret) {
g_assert(qemu_file_get_error(f));
} else{
g_assert(!qemu_file_get_error(f));
}
qemu_fclose(f);
return ret;
}
static int load_vmstate(const VMStateDescription *desc,
void *obj, void *obj_clone,
void (*obj_copy)(void *, void*),
int version, uint8_t *wire, size_t size)
{
/* We test with zero size */
obj_copy(obj_clone, obj);
FAILURE(load_vmstate_one(desc, obj, version, wire, 0));
/* Stream ends with QEMU_EOF, so we need at least 3 bytes to be
* able to test in the middle */
if (size > 3) {
/* We test with size - 2. We can't test size - 1 due to EOF tricks */
obj_copy(obj, obj_clone);
FAILURE(load_vmstate_one(desc, obj, version, wire, size - 2));
/* Test with size/2, first half of real state */
obj_copy(obj, obj_clone);
FAILURE(load_vmstate_one(desc, obj, version, wire, size/2));
/* Test with size/2, second half of real state */
obj_copy(obj, obj_clone);
FAILURE(load_vmstate_one(desc, obj, version, wire + (size/2), size/2));
}
obj_copy(obj, obj_clone);
return load_vmstate_one(desc, obj, version, wire, size);
}
/* Test struct that we are going to use for our tests */
typedef struct TestSimple {
bool b_1, b_2;
uint8_t u8_1;
uint16_t u16_1;
uint32_t u32_1;
uint64_t u64_1;
int8_t i8_1, i8_2;
int16_t i16_1, i16_2;
int32_t i32_1, i32_2;
int64_t i64_1, i64_2;
} TestSimple;
/* Object instantiation, we are going to use it in more than one test */
TestSimple obj_simple = {
.b_1 = true,
.b_2 = false,
.u8_1 = 130,
.u16_1 = 512,
.u32_1 = 70000,
.u64_1 = 12121212,
.i8_1 = 65,
.i8_2 = -65,
.i16_1 = 512,
.i16_2 = -512,
.i32_1 = 70000,
.i32_2 = -70000,
.i64_1 = 12121212,
.i64_2 = -12121212,
};
/* Description of the values. If you add a primitive type
you are expected to add a test here */
static const VMStateDescription vmstate_simple_primitive = {
.name = "simple/primitive",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_BOOL(b_1, TestSimple),
VMSTATE_BOOL(b_2, TestSimple),
VMSTATE_UINT8(u8_1, TestSimple),
VMSTATE_UINT16(u16_1, TestSimple),
VMSTATE_UINT32(u32_1, TestSimple),
VMSTATE_UINT64(u64_1, TestSimple),
VMSTATE_INT8(i8_1, TestSimple),
VMSTATE_INT8(i8_2, TestSimple),
VMSTATE_INT16(i16_1, TestSimple),
VMSTATE_INT16(i16_2, TestSimple),
VMSTATE_INT32(i32_1, TestSimple),
VMSTATE_INT32(i32_2, TestSimple),
VMSTATE_INT64(i64_1, TestSimple),
VMSTATE_INT64(i64_2, TestSimple),
VMSTATE_END_OF_LIST()
}
};
/* It describes what goes through the wire. Our tests are basically:
* save test
- save a struct a vmstate to a file
- read that file back (binary read, no vmstate)
- compare it with what we expect to be on the wire
* load test
- save to the file what we expect to be on the wire
- read struct back with vmstate in a different
- compare back with the original struct
*/
uint8_t wire_simple_primitive[] = {
/* b_1 */ 0x01,
/* b_2 */ 0x00,
/* u8_1 */ 0x82,
/* u16_1 */ 0x02, 0x00,
/* u32_1 */ 0x00, 0x01, 0x11, 0x70,
/* u64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
/* i8_1 */ 0x41,
/* i8_2 */ 0xbf,
/* i16_1 */ 0x02, 0x00,
/* i16_2 */ 0xfe, 0x0,
/* i32_1 */ 0x00, 0x01, 0x11, 0x70,
/* i32_2 */ 0xff, 0xfe, 0xee, 0x90,
/* i64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
/* i64_2 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0x47, 0x0b, 0x84,
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
static void obj_simple_copy(void *target, void *source)
{
memcpy(target, source, sizeof(TestSimple));
}
static void test_simple_primitive(void)
{
TestSimple obj, obj_clone;
memset(&obj, 0, sizeof(obj));
save_vmstate(&vmstate_simple_primitive, &obj_simple);
compare_vmstate(wire_simple_primitive, sizeof(wire_simple_primitive));
SUCCESS(load_vmstate(&vmstate_simple_primitive, &obj, &obj_clone,
obj_simple_copy, 1, wire_simple_primitive,
sizeof(wire_simple_primitive)));
#define FIELD_EQUAL(name) g_assert_cmpint(obj.name, ==, obj_simple.name)
FIELD_EQUAL(b_1);
FIELD_EQUAL(b_2);
FIELD_EQUAL(u8_1);
FIELD_EQUAL(u16_1);
FIELD_EQUAL(u32_1);
FIELD_EQUAL(u64_1);
FIELD_EQUAL(i8_1);
FIELD_EQUAL(i8_2);
FIELD_EQUAL(i16_1);
FIELD_EQUAL(i16_2);
FIELD_EQUAL(i32_1);
FIELD_EQUAL(i32_2);
FIELD_EQUAL(i64_1);
FIELD_EQUAL(i64_2);
}
#undef FIELD_EQUAL
typedef struct TestStruct {
uint32_t a, b, c, e;
uint64_t d, f;
bool skip_c_e;
} TestStruct;
static const VMStateDescription vmstate_versioned = {
.name = "test/versioned",
.version_id = 2,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(a, TestStruct),
VMSTATE_UINT32_V(b, TestStruct, 2), /* Versioned field in the middle, so
* we catch bugs more easily.
*/
VMSTATE_UINT32(c, TestStruct),
VMSTATE_UINT64(d, TestStruct),
VMSTATE_UINT32_V(e, TestStruct, 2),
VMSTATE_UINT64_V(f, TestStruct, 2),
VMSTATE_END_OF_LIST()
}
};
static void test_load_v1(void)
{
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
save_buffer(buf, sizeof(buf));
QEMUFile *loading = open_test_file(false);
TestStruct obj = { .b = 200, .e = 500, .f = 600 };
vmstate_load_state(loading, &vmstate_versioned, &obj, 1);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 200);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 500);
g_assert_cmpint(obj.f, ==, 600);
qemu_fclose(loading);
}
static void test_load_v2(void)
{
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
0, 0, 0, 50, /* e */
0, 0, 0, 0, 0, 0, 0, 60, /* f */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
save_buffer(buf, sizeof(buf));
QEMUFile *loading = open_test_file(false);
TestStruct obj;
vmstate_load_state(loading, &vmstate_versioned, &obj, 2);
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 50);
g_assert_cmpint(obj.f, ==, 60);
qemu_fclose(loading);
}
static bool test_skip(void *opaque, int version_id)
{
TestStruct *t = (TestStruct *)opaque;
return !t->skip_c_e;
}
static const VMStateDescription vmstate_skipping = {
.name = "test/skip",
.version_id = 2,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(a, TestStruct),
VMSTATE_UINT32(b, TestStruct),
VMSTATE_UINT32_TEST(c, TestStruct, test_skip),
VMSTATE_UINT64(d, TestStruct),
VMSTATE_UINT32_TEST(e, TestStruct, test_skip),
VMSTATE_UINT64_V(f, TestStruct, 2),
VMSTATE_END_OF_LIST()
}
};
static void test_save_noskip(void)
{
QEMUFile *fsave = open_test_file(true);
TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
.skip_c_e = false };
vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
g_assert(!qemu_file_get_error(fsave));
uint8_t expected[] = {
0, 0, 0, 1, /* a */
0, 0, 0, 2, /* b */
0, 0, 0, 3, /* c */
0, 0, 0, 0, 0, 0, 0, 4, /* d */
0, 0, 0, 5, /* e */
0, 0, 0, 0, 0, 0, 0, 6, /* f */
};
qemu_fclose(fsave);
compare_vmstate(expected, sizeof(expected));
}
static void test_save_skip(void)
{
QEMUFile *fsave = open_test_file(true);
TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
.skip_c_e = true };
vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
g_assert(!qemu_file_get_error(fsave));
uint8_t expected[] = {
0, 0, 0, 1, /* a */
0, 0, 0, 2, /* b */
0, 0, 0, 0, 0, 0, 0, 4, /* d */
0, 0, 0, 0, 0, 0, 0, 6, /* f */
};
qemu_fclose(fsave);
compare_vmstate(expected, sizeof(expected));
}
static void test_load_noskip(void)
{
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
0, 0, 0, 50, /* e */
0, 0, 0, 0, 0, 0, 0, 60, /* f */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
save_buffer(buf, sizeof(buf));
QEMUFile *loading = open_test_file(false);
TestStruct obj = { .skip_c_e = false };
vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 50);
g_assert_cmpint(obj.f, ==, 60);
qemu_fclose(loading);
}
static void test_load_skip(void)
{
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
0, 0, 0, 0, 0, 0, 0, 60, /* f */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
save_buffer(buf, sizeof(buf));
QEMUFile *loading = open_test_file(false);
TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 };
vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 300);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 500);
g_assert_cmpint(obj.f, ==, 60);
qemu_fclose(loading);
}
typedef struct {
int32_t i;
} TestStructTriv;
const VMStateDescription vmsd_tst = {
.name = "test/tst",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32(i, TestStructTriv),
VMSTATE_END_OF_LIST()
}
};
#define AR_SIZE 4
typedef struct {
TestStructTriv *ar[AR_SIZE];
} TestArrayOfPtrToStuct;
const VMStateDescription vmsd_arps = {
.name = "test/arps",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(ar, TestArrayOfPtrToStuct,
AR_SIZE, 0, vmsd_tst, TestStructTriv),
VMSTATE_END_OF_LIST()
}
};
static void test_arr_ptr_str_no0_save(void)
{
TestStructTriv ar[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
TestArrayOfPtrToStuct sample = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
uint8_t wire_sample[] = {
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x02,
0x00, 0x00, 0x00, 0x03,
QEMU_VM_EOF
};
save_vmstate(&vmsd_arps, &sample);
compare_vmstate(wire_sample, sizeof(wire_sample));
}
static void test_arr_ptr_str_no0_load(void)
{
TestStructTriv ar_gt[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
TestStructTriv ar[AR_SIZE] = {};
TestArrayOfPtrToStuct obj = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
int idx;
uint8_t wire_sample[] = {
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x02,
0x00, 0x00, 0x00, 0x03,
QEMU_VM_EOF
};
save_buffer(wire_sample, sizeof(wire_sample));
SUCCESS(load_vmstate_one(&vmsd_arps, &obj, 1,
wire_sample, sizeof(wire_sample)));
for (idx = 0; idx < AR_SIZE; ++idx) {
/* compare the target array ar with the ground truth array ar_gt */
g_assert_cmpint(ar_gt[idx].i, ==, ar[idx].i);
}
}
int main(int argc, char **argv)
{
temp_fd = mkstemp(temp_file);
module_call_init(MODULE_INIT_QOM);
g_test_init(&argc, &argv, NULL);
g_test_add_func("/vmstate/simple/primitive", test_simple_primitive);
g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
g_test_add_func("/vmstate/versioned/load/v2", test_load_v2);
g_test_add_func("/vmstate/field_exists/load/noskip", test_load_noskip);
g_test_add_func("/vmstate/field_exists/load/skip", test_load_skip);
g_test_add_func("/vmstate/field_exists/save/noskip", test_save_noskip);
g_test_add_func("/vmstate/field_exists/save/skip", test_save_skip);
g_test_add_func("/vmstate/array/ptr/str/no0/save",
test_arr_ptr_str_no0_save);
g_test_add_func("/vmstate/array/ptr/str/no0/load",
test_arr_ptr_str_no0_load);
g_test_run();
close(temp_fd);
unlink(temp_file);
return 0;
}
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