tests/test-vmstate.c

   1 /*
   2  *  Test code for VMState
   3  *
   4  *  Copyright (c) 2013 Red Hat Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26
  27 #include "../migration/migration.h"
  28 #include "migration/vmstate.h"
  29 #include "migration/qemu-file-types.h"
  30 #include "../migration/qemu-file.h"
  31 #include "../migration/qemu-file-channel.h"
  32 #include "../migration/savevm.h"
  33 #include "qemu/coroutine.h"
  34 #include "qemu/module.h"
  35 #include "io/channel-file.h"
  36
  37 static char temp_file[] = "/tmp/vmst.test.XXXXXX";
  38 static int temp_fd;
  39
  40
  41 /* Duplicate temp_fd and seek to the beginning of the file */
  42 static QEMUFile *open_test_file(bool write)
  43 {
  44     int fd = dup(temp_fd);
  45     QIOChannel *ioc;
  46     QEMUFile *f;
  47
  48     lseek(fd, 0, SEEK_SET);
  49     if (write) {
  50         g_assert_cmpint(ftruncate(fd, 0), ==, 0);
  51     }
  52     ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
  53     if (write) {
  54         f = qemu_fopen_channel_output(ioc);
  55     } else {
  56         f = qemu_fopen_channel_input(ioc);
  57     }
  58     object_unref(OBJECT(ioc));
  59     return f;
  60 }
  61
  62 #define SUCCESS(val) \
  63     g_assert_cmpint((val), ==, 0)
  64
  65 #define FAILURE(val) \
  66     g_assert_cmpint((val), !=, 0)
  67
  68 static void save_vmstate(const VMStateDescription *desc, void *obj)
  69 {
  70     QEMUFile *f = open_test_file(true);
  71
  72     /* Save file with vmstate */
  73     int ret = vmstate_save_state(f, desc, obj, NULL);
  74     g_assert(!ret);
  75     qemu_put_byte(f, QEMU_VM_EOF);
  76     g_assert(!qemu_file_get_error(f));
  77     qemu_fclose(f);
  78 }
  79
  80 static void save_buffer(const uint8_t *buf, size_t buf_size)
  81 {
  82     QEMUFile *fsave = open_test_file(true);
  83     qemu_put_buffer(fsave, buf, buf_size);
  84     qemu_fclose(fsave);
  85 }
  86
  87 static void compare_vmstate(const uint8_t *wire, size_t size)
  88 {
  89     QEMUFile *f = open_test_file(false);
  90     uint8_t result[size];
  91
  92     /* read back as binary */
  93
  94     g_assert_cmpint(qemu_get_buffer(f, result, sizeof(result)), ==,
  95                     sizeof(result));
  96     g_assert(!qemu_file_get_error(f));
  97
  98     /* Compare that what is on the file is the same that what we
  99        expected to be there */
 100     SUCCESS(memcmp(result, wire, sizeof(result)));
 101
 102     /* Must reach EOF */
 103     qemu_get_byte(f);
 104     g_assert_cmpint(qemu_file_get_error(f), ==, -EIO);
 105
 106     qemu_fclose(f);
 107 }
 108
 109 static int load_vmstate_one(const VMStateDescription *desc, void *obj,
 110                             int version, const uint8_t *wire, size_t size)
 111 {
 112     QEMUFile *f;
 113     int ret;
 114
 115     f = open_test_file(true);
 116     qemu_put_buffer(f, wire, size);
 117     qemu_fclose(f);
 118
 119     f = open_test_file(false);
 120     ret = vmstate_load_state(f, desc, obj, version);
 121     if (ret) {
 122         g_assert(qemu_file_get_error(f));
 123     } else{
 124         g_assert(!qemu_file_get_error(f));
 125     }
 126     qemu_fclose(f);
 127     return ret;
 128 }
 129
 130
 131 static int load_vmstate(const VMStateDescription *desc,
 132                         void *obj, void *obj_clone,
 133                         void (*obj_copy)(void *, void*),
 134                         int version, const uint8_t *wire, size_t size)
 135 {
 136     /* We test with zero size */
 137     obj_copy(obj_clone, obj);
 138     FAILURE(load_vmstate_one(desc, obj, version, wire, 0));
 139
 140     /* Stream ends with QEMU_EOF, so we need at least 3 bytes to be
 141      * able to test in the middle */
 142
 143     if (size > 3) {
 144
 145         /* We test with size - 2. We can't test size - 1 due to EOF tricks */
 146         obj_copy(obj, obj_clone);
 147         FAILURE(load_vmstate_one(desc, obj, version, wire, size - 2));
 148
 149         /* Test with size/2, first half of real state */
 150         obj_copy(obj, obj_clone);
 151         FAILURE(load_vmstate_one(desc, obj, version, wire, size/2));
 152
 153         /* Test with size/2, second half of real state */
 154         obj_copy(obj, obj_clone);
 155         FAILURE(load_vmstate_one(desc, obj, version, wire + (size/2), size/2));
 156
 157     }
 158     obj_copy(obj, obj_clone);
 159     return load_vmstate_one(desc, obj, version, wire, size);
 160 }
 161
 162 /* Test struct that we are going to use for our tests */
 163
 164 typedef struct TestSimple {
 165     bool     b_1,   b_2;
 166     uint8_t  u8_1;
 167     uint16_t u16_1;
 168     uint32_t u32_1;
 169     uint64_t u64_1;
 170     int8_t   i8_1,  i8_2;
 171     int16_t  i16_1, i16_2;
 172     int32_t  i32_1, i32_2;
 173     int64_t  i64_1, i64_2;
 174 } TestSimple;
 175
 176 /* Object instantiation, we are going to use it in more than one test */
 177
 178 TestSimple obj_simple = {
 179     .b_1 = true,
 180     .b_2 = false,
 181     .u8_1 = 130,
 182     .u16_1 = 512,
 183     .u32_1 = 70000,
 184     .u64_1 = 12121212,
 185     .i8_1 = 65,
 186     .i8_2 = -65,
 187     .i16_1 = 512,
 188     .i16_2 = -512,
 189     .i32_1 = 70000,
 190     .i32_2 = -70000,
 191     .i64_1 = 12121212,
 192     .i64_2 = -12121212,
 193 };
 194
 195 /* Description of the values.  If you add a primitive type
 196    you are expected to add a test here */
 197
 198 static const VMStateDescription vmstate_simple_primitive = {
 199     .name = "simple/primitive",
 200     .version_id = 1,
 201     .minimum_version_id = 1,
 202     .fields = (VMStateField[]) {
 203         VMSTATE_BOOL(b_1, TestSimple),
 204         VMSTATE_BOOL(b_2, TestSimple),
 205         VMSTATE_UINT8(u8_1, TestSimple),
 206         VMSTATE_UINT16(u16_1, TestSimple),
 207         VMSTATE_UINT32(u32_1, TestSimple),
 208         VMSTATE_UINT64(u64_1, TestSimple),
 209         VMSTATE_INT8(i8_1, TestSimple),
 210         VMSTATE_INT8(i8_2, TestSimple),
 211         VMSTATE_INT16(i16_1, TestSimple),
 212         VMSTATE_INT16(i16_2, TestSimple),
 213         VMSTATE_INT32(i32_1, TestSimple),
 214         VMSTATE_INT32(i32_2, TestSimple),
 215         VMSTATE_INT64(i64_1, TestSimple),
 216         VMSTATE_INT64(i64_2, TestSimple),
 217         VMSTATE_END_OF_LIST()
 218     }
 219 };
 220
 221 /* It describes what goes through the wire.  Our tests are basically:
 222
 223    * save test
 224      - save a struct a vmstate to a file
 225      - read that file back (binary read, no vmstate)
 226      - compare it with what we expect to be on the wire
 227    * load test
 228      - save to the file what we expect to be on the wire
 229      - read struct back with vmstate in a different
 230      - compare back with the original struct
 231 */
 232
 233 uint8_t wire_simple_primitive[] = {
 234     /* b_1 */   0x01,
 235     /* b_2 */   0x00,
 236     /* u8_1 */  0x82,
 237     /* u16_1 */ 0x02, 0x00,
 238     /* u32_1 */ 0x00, 0x01, 0x11, 0x70,
 239     /* u64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
 240     /* i8_1 */  0x41,
 241     /* i8_2 */  0xbf,
 242     /* i16_1 */ 0x02, 0x00,
 243     /* i16_2 */ 0xfe, 0x0,
 244     /* i32_1 */ 0x00, 0x01, 0x11, 0x70,
 245     /* i32_2 */ 0xff, 0xfe, 0xee, 0x90,
 246     /* i64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
 247     /* i64_2 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0x47, 0x0b, 0x84,
 248     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 249 };
 250
 251 static void obj_simple_copy(void *target, void *source)
 252 {
 253     memcpy(target, source, sizeof(TestSimple));
 254 }
 255
 256 static void test_simple_primitive(void)
 257 {
 258     TestSimple obj, obj_clone;
 259
 260     memset(&obj, 0, sizeof(obj));
 261     save_vmstate(&vmstate_simple_primitive, &obj_simple);
 262
 263     compare_vmstate(wire_simple_primitive, sizeof(wire_simple_primitive));
 264
 265     SUCCESS(load_vmstate(&vmstate_simple_primitive, &obj, &obj_clone,
 266                          obj_simple_copy, 1, wire_simple_primitive,
 267                          sizeof(wire_simple_primitive)));
 268
 269 #define FIELD_EQUAL(name)   g_assert_cmpint(obj.name, ==, obj_simple.name)
 270
 271     FIELD_EQUAL(b_1);
 272     FIELD_EQUAL(b_2);
 273     FIELD_EQUAL(u8_1);
 274     FIELD_EQUAL(u16_1);
 275     FIELD_EQUAL(u32_1);
 276     FIELD_EQUAL(u64_1);
 277     FIELD_EQUAL(i8_1);
 278     FIELD_EQUAL(i8_2);
 279     FIELD_EQUAL(i16_1);
 280     FIELD_EQUAL(i16_2);
 281     FIELD_EQUAL(i32_1);
 282     FIELD_EQUAL(i32_2);
 283     FIELD_EQUAL(i64_1);
 284     FIELD_EQUAL(i64_2);
 285 }
 286
 287 typedef struct TestSimpleArray {
 288     uint16_t u16_1[3];
 289 } TestSimpleArray;
 290
 291 /* Object instantiation, we are going to use it in more than one test */
 292
 293 TestSimpleArray obj_simple_arr = {
 294     .u16_1 = { 0x42, 0x43, 0x44 },
 295 };
 296
 297 /* Description of the values.  If you add a primitive type
 298    you are expected to add a test here */
 299
 300 static const VMStateDescription vmstate_simple_arr = {
 301     .name = "simple/array",
 302     .version_id = 1,
 303     .minimum_version_id = 1,
 304     .fields = (VMStateField[]) {
 305         VMSTATE_UINT16_ARRAY(u16_1, TestSimpleArray, 3),
 306         VMSTATE_END_OF_LIST()
 307     }
 308 };
 309
 310 uint8_t wire_simple_arr[] = {
 311     /* u16_1 */ 0x00, 0x42,
 312     /* u16_1 */ 0x00, 0x43,
 313     /* u16_1 */ 0x00, 0x44,
 314     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 315 };
 316
 317 static void obj_simple_arr_copy(void *target, void *source)
 318 {
 319     memcpy(target, source, sizeof(TestSimpleArray));
 320 }
 321
 322 static void test_simple_array(void)
 323 {
 324     TestSimpleArray obj, obj_clone;
 325
 326     memset(&obj, 0, sizeof(obj));
 327     save_vmstate(&vmstate_simple_arr, &obj_simple_arr);
 328
 329     compare_vmstate(wire_simple_arr, sizeof(wire_simple_arr));
 330
 331     SUCCESS(load_vmstate(&vmstate_simple_arr, &obj, &obj_clone,
 332                          obj_simple_arr_copy, 1, wire_simple_arr,
 333                          sizeof(wire_simple_arr)));
 334 }
 335
 336 typedef struct TestStruct {
 337     uint32_t a, b, c, e;
 338     uint64_t d, f;
 339     bool skip_c_e;
 340 } TestStruct;
 341
 342 static const VMStateDescription vmstate_versioned = {
 343     .name = "test/versioned",
 344     .version_id = 2,
 345     .minimum_version_id = 1,
 346     .fields = (VMStateField[]) {
 347         VMSTATE_UINT32(a, TestStruct),
 348         VMSTATE_UINT32_V(b, TestStruct, 2), /* Versioned field in the middle, so
 349                                              * we catch bugs more easily.
 350                                              */
 351         VMSTATE_UINT32(c, TestStruct),
 352         VMSTATE_UINT64(d, TestStruct),
 353         VMSTATE_UINT32_V(e, TestStruct, 2),
 354         VMSTATE_UINT64_V(f, TestStruct, 2),
 355         VMSTATE_END_OF_LIST()
 356     }
 357 };
 358
 359 static void test_load_v1(void)
 360 {
 361     uint8_t buf[] = {
 362         0, 0, 0, 10,             /* a */
 363         0, 0, 0, 30,             /* c */
 364         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 365         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 366     };
 367     save_buffer(buf, sizeof(buf));
 368
 369     QEMUFile *loading = open_test_file(false);
 370     TestStruct obj = { .b = 200, .e = 500, .f = 600 };
 371     vmstate_load_state(loading, &vmstate_versioned, &obj, 1);
 372     g_assert(!qemu_file_get_error(loading));
 373     g_assert_cmpint(obj.a, ==, 10);
 374     g_assert_cmpint(obj.b, ==, 200);
 375     g_assert_cmpint(obj.c, ==, 30);
 376     g_assert_cmpint(obj.d, ==, 40);
 377     g_assert_cmpint(obj.e, ==, 500);
 378     g_assert_cmpint(obj.f, ==, 600);
 379     qemu_fclose(loading);
 380 }
 381
 382 static void test_load_v2(void)
 383 {
 384     uint8_t buf[] = {
 385         0, 0, 0, 10,             /* a */
 386         0, 0, 0, 20,             /* b */
 387         0, 0, 0, 30,             /* c */
 388         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 389         0, 0, 0, 50,             /* e */
 390         0, 0, 0, 0, 0, 0, 0, 60, /* f */
 391         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 392     };
 393     save_buffer(buf, sizeof(buf));
 394
 395     QEMUFile *loading = open_test_file(false);
 396     TestStruct obj;
 397     vmstate_load_state(loading, &vmstate_versioned, &obj, 2);
 398     g_assert_cmpint(obj.a, ==, 10);
 399     g_assert_cmpint(obj.b, ==, 20);
 400     g_assert_cmpint(obj.c, ==, 30);
 401     g_assert_cmpint(obj.d, ==, 40);
 402     g_assert_cmpint(obj.e, ==, 50);
 403     g_assert_cmpint(obj.f, ==, 60);
 404     qemu_fclose(loading);
 405 }
 406
 407 static bool test_skip(void *opaque, int version_id)
 408 {
 409     TestStruct *t = (TestStruct *)opaque;
 410     return !t->skip_c_e;
 411 }
 412
 413 static const VMStateDescription vmstate_skipping = {
 414     .name = "test/skip",
 415     .version_id = 2,
 416     .minimum_version_id = 1,
 417     .fields = (VMStateField[]) {
 418         VMSTATE_UINT32(a, TestStruct),
 419         VMSTATE_UINT32(b, TestStruct),
 420         VMSTATE_UINT32_TEST(c, TestStruct, test_skip),
 421         VMSTATE_UINT64(d, TestStruct),
 422         VMSTATE_UINT32_TEST(e, TestStruct, test_skip),
 423         VMSTATE_UINT64_V(f, TestStruct, 2),
 424         VMSTATE_END_OF_LIST()
 425     }
 426 };
 427
 428
 429 static void test_save_noskip(void)
 430 {
 431     QEMUFile *fsave = open_test_file(true);
 432     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
 433                        .skip_c_e = false };
 434     int ret = vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
 435     g_assert(!ret);
 436     g_assert(!qemu_file_get_error(fsave));
 437
 438     uint8_t expected[] = {
 439         0, 0, 0, 1,             /* a */
 440         0, 0, 0, 2,             /* b */
 441         0, 0, 0, 3,             /* c */
 442         0, 0, 0, 0, 0, 0, 0, 4, /* d */
 443         0, 0, 0, 5,             /* e */
 444         0, 0, 0, 0, 0, 0, 0, 6, /* f */
 445     };
 446
 447     qemu_fclose(fsave);
 448     compare_vmstate(expected, sizeof(expected));
 449 }
 450
 451 static void test_save_skip(void)
 452 {
 453     QEMUFile *fsave = open_test_file(true);
 454     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
 455                        .skip_c_e = true };
 456     int ret = vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
 457     g_assert(!ret);
 458     g_assert(!qemu_file_get_error(fsave));
 459
 460     uint8_t expected[] = {
 461         0, 0, 0, 1,             /* a */
 462         0, 0, 0, 2,             /* b */
 463         0, 0, 0, 0, 0, 0, 0, 4, /* d */
 464         0, 0, 0, 0, 0, 0, 0, 6, /* f */
 465     };
 466
 467     qemu_fclose(fsave);
 468     compare_vmstate(expected, sizeof(expected));
 469 }
 470
 471 static void test_load_noskip(void)
 472 {
 473     uint8_t buf[] = {
 474         0, 0, 0, 10,             /* a */
 475         0, 0, 0, 20,             /* b */
 476         0, 0, 0, 30,             /* c */
 477         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 478         0, 0, 0, 50,             /* e */
 479         0, 0, 0, 0, 0, 0, 0, 60, /* f */
 480         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 481     };
 482     save_buffer(buf, sizeof(buf));
 483
 484     QEMUFile *loading = open_test_file(false);
 485     TestStruct obj = { .skip_c_e = false };
 486     vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
 487     g_assert(!qemu_file_get_error(loading));
 488     g_assert_cmpint(obj.a, ==, 10);
 489     g_assert_cmpint(obj.b, ==, 20);
 490     g_assert_cmpint(obj.c, ==, 30);
 491     g_assert_cmpint(obj.d, ==, 40);
 492     g_assert_cmpint(obj.e, ==, 50);
 493     g_assert_cmpint(obj.f, ==, 60);
 494     qemu_fclose(loading);
 495 }
 496
 497 static void test_load_skip(void)
 498 {
 499     uint8_t buf[] = {
 500         0, 0, 0, 10,             /* a */
 501         0, 0, 0, 20,             /* b */
 502         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 503         0, 0, 0, 0, 0, 0, 0, 60, /* f */
 504         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 505     };
 506     save_buffer(buf, sizeof(buf));
 507
 508     QEMUFile *loading = open_test_file(false);
 509     TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 };
 510     vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
 511     g_assert(!qemu_file_get_error(loading));
 512     g_assert_cmpint(obj.a, ==, 10);
 513     g_assert_cmpint(obj.b, ==, 20);
 514     g_assert_cmpint(obj.c, ==, 300);
 515     g_assert_cmpint(obj.d, ==, 40);
 516     g_assert_cmpint(obj.e, ==, 500);
 517     g_assert_cmpint(obj.f, ==, 60);
 518     qemu_fclose(loading);
 519 }
 520
 521 typedef struct {
 522     int32_t i;
 523 } TestStructTriv;
 524
 525 const VMStateDescription vmsd_tst = {
 526     .name = "test/tst",
 527     .version_id = 1,
 528     .minimum_version_id = 1,
 529     .fields = (VMStateField[]) {
 530         VMSTATE_INT32(i, TestStructTriv),
 531         VMSTATE_END_OF_LIST()
 532     }
 533 };
 534
 535 /* test array migration */
 536
 537 #define AR_SIZE 4
 538
 539 typedef struct {
 540     TestStructTriv *ar[AR_SIZE];
 541 } TestArrayOfPtrToStuct;
 542
 543 const VMStateDescription vmsd_arps = {
 544     .name = "test/arps",
 545     .version_id = 1,
 546     .minimum_version_id = 1,
 547     .fields = (VMStateField[]) {
 548         VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(ar, TestArrayOfPtrToStuct,
 549                 AR_SIZE, 0, vmsd_tst, TestStructTriv),
 550         VMSTATE_END_OF_LIST()
 551     }
 552 };
 553
 554 static uint8_t wire_arr_ptr_no0[] = {
 555     0x00, 0x00, 0x00, 0x00,
 556     0x00, 0x00, 0x00, 0x01,
 557     0x00, 0x00, 0x00, 0x02,
 558     0x00, 0x00, 0x00, 0x03,
 559     QEMU_VM_EOF
 560 };
 561
 562 static void test_arr_ptr_str_no0_save(void)
 563 {
 564     TestStructTriv ar[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
 565     TestArrayOfPtrToStuct sample = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
 566
 567     save_vmstate(&vmsd_arps, &sample);
 568     compare_vmstate(wire_arr_ptr_no0, sizeof(wire_arr_ptr_no0));
 569 }
 570
 571 static void test_arr_ptr_str_no0_load(void)
 572 {
 573     TestStructTriv ar_gt[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
 574     TestStructTriv ar[AR_SIZE] = {};
 575     TestArrayOfPtrToStuct obj = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
 576     int idx;
 577
 578     save_buffer(wire_arr_ptr_no0, sizeof(wire_arr_ptr_no0));
 579     SUCCESS(load_vmstate_one(&vmsd_arps, &obj, 1,
 580                           wire_arr_ptr_no0, sizeof(wire_arr_ptr_no0)));
 581     for (idx = 0; idx < AR_SIZE; ++idx) {
 582         /* compare the target array ar with the ground truth array ar_gt */
 583         g_assert_cmpint(ar_gt[idx].i, ==, ar[idx].i);
 584     }
 585 }
 586
 587 static uint8_t wire_arr_ptr_0[] = {
 588     0x00, 0x00, 0x00, 0x00,
 589     VMS_NULLPTR_MARKER,
 590     0x00, 0x00, 0x00, 0x02,
 591     0x00, 0x00, 0x00, 0x03,
 592     QEMU_VM_EOF
 593 };
 594
 595 static void test_arr_ptr_str_0_save(void)
 596 {
 597     TestStructTriv ar[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
 598     TestArrayOfPtrToStuct sample = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
 599
 600     save_vmstate(&vmsd_arps, &sample);
 601     compare_vmstate(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
 602 }
 603
 604 static void test_arr_ptr_str_0_load(void)
 605 {
 606     TestStructTriv ar_gt[AR_SIZE] = {{.i = 0}, {.i = 0}, {.i = 2}, {.i = 3} };
 607     TestStructTriv ar[AR_SIZE] = {};
 608     TestArrayOfPtrToStuct obj = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
 609     int idx;
 610
 611     save_buffer(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
 612     SUCCESS(load_vmstate_one(&vmsd_arps, &obj, 1,
 613                           wire_arr_ptr_0, sizeof(wire_arr_ptr_0)));
 614     for (idx = 0; idx < AR_SIZE; ++idx) {
 615         /* compare the target array ar with the ground truth array ar_gt */
 616         g_assert_cmpint(ar_gt[idx].i, ==, ar[idx].i);
 617     }
 618     for (idx = 0; idx < AR_SIZE; ++idx) {
 619         if (idx == 1) {
 620             g_assert_cmpint((uintptr_t)(obj.ar[idx]), ==, 0);
 621         } else {
 622             g_assert_cmpint((uintptr_t)(obj.ar[idx]), !=, 0);
 623         }
 624     }
 625 }
 626
 627 typedef struct TestArrayOfPtrToInt {
 628     int32_t *ar[AR_SIZE];
 629 } TestArrayOfPtrToInt;
 630
 631 const VMStateDescription vmsd_arpp = {
 632     .name = "test/arps",
 633     .version_id = 1,
 634     .minimum_version_id = 1,
 635     .fields = (VMStateField[]) {
 636         VMSTATE_ARRAY_OF_POINTER(ar, TestArrayOfPtrToInt,
 637                 AR_SIZE, 0, vmstate_info_int32, int32_t*),
 638         VMSTATE_END_OF_LIST()
 639     }
 640 };
 641
 642 static void test_arr_ptr_prim_0_save(void)
 643 {
 644     int32_t ar[AR_SIZE] = {0 , 1, 2, 3};
 645     TestArrayOfPtrToInt  sample = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
 646
 647     save_vmstate(&vmsd_arpp, &sample);
 648     compare_vmstate(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
 649 }
 650
 651 static void test_arr_ptr_prim_0_load(void)
 652 {
 653     int32_t ar_gt[AR_SIZE] = {0, 1, 2, 3};
 654     int32_t ar[AR_SIZE] = {3 , 42, 1, 0};
 655     TestArrayOfPtrToInt obj = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
 656     int idx;
 657
 658     save_buffer(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
 659     SUCCESS(load_vmstate_one(&vmsd_arpp, &obj, 1,
 660                           wire_arr_ptr_0, sizeof(wire_arr_ptr_0)));
 661     for (idx = 0; idx < AR_SIZE; ++idx) {
 662         /* compare the target array ar with the ground truth array ar_gt */
 663         if (idx == 1) {
 664             g_assert_cmpint(42, ==, ar[idx]);
 665         } else {
 666             g_assert_cmpint(ar_gt[idx], ==, ar[idx]);
 667         }
 668     }
 669 }
 670
 671 /* test QTAILQ migration */
 672 typedef struct TestQtailqElement TestQtailqElement;
 673
 674 struct TestQtailqElement {
 675     bool     b;
 676     uint8_t  u8;
 677     QTAILQ_ENTRY(TestQtailqElement) next;
 678 };
 679
 680 typedef struct TestQtailq {
 681     int16_t  i16;
 682     QTAILQ_HEAD(, TestQtailqElement) q;
 683     int32_t  i32;
 684 } TestQtailq;
 685
 686 static const VMStateDescription vmstate_q_element = {
 687     .name = "test/queue-element",
 688     .version_id = 1,
 689     .minimum_version_id = 1,
 690     .fields = (VMStateField[]) {
 691         VMSTATE_BOOL(b, TestQtailqElement),
 692         VMSTATE_UINT8(u8, TestQtailqElement),
 693         VMSTATE_END_OF_LIST()
 694     },
 695 };
 696
 697 static const VMStateDescription vmstate_q = {
 698     .name = "test/queue",
 699     .version_id = 1,
 700     .minimum_version_id = 1,
 701     .fields = (VMStateField[]) {
 702         VMSTATE_INT16(i16, TestQtailq),
 703         VMSTATE_QTAILQ_V(q, TestQtailq, 1, vmstate_q_element, TestQtailqElement,
 704                          next),
 705         VMSTATE_INT32(i32, TestQtailq),
 706         VMSTATE_END_OF_LIST()
 707     }
 708 };
 709
 710 uint8_t wire_q[] = {
 711     /* i16 */                     0xfe, 0x0,
 712     /* start of element 0 of q */ 0x01,
 713     /* .b  */                     0x01,
 714     /* .u8 */                     0x82,
 715     /* start of element 1 of q */ 0x01,
 716     /* b */                       0x00,
 717     /* u8 */                      0x41,
 718     /* end of q */                0x00,
 719     /* i32 */                     0x00, 0x01, 0x11, 0x70,
 720     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 721 };
 722
 723 static void test_save_q(void)
 724 {
 725     TestQtailq obj_q = {
 726         .i16 = -512,
 727         .i32 = 70000,
 728     };
 729
 730     TestQtailqElement obj_qe1 = {
 731         .b = true,
 732         .u8 = 130,
 733     };
 734
 735     TestQtailqElement obj_qe2 = {
 736         .b = false,
 737         .u8 = 65,
 738     };
 739
 740     QTAILQ_INIT(&obj_q.q);
 741     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
 742     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);
 743
 744     save_vmstate(&vmstate_q, &obj_q);
 745     compare_vmstate(wire_q, sizeof(wire_q));
 746 }
 747
 748 static void test_load_q(void)
 749 {
 750     TestQtailq obj_q = {
 751         .i16 = -512,
 752         .i32 = 70000,
 753     };
 754
 755     TestQtailqElement obj_qe1 = {
 756         .b = true,
 757         .u8 = 130,
 758     };
 759
 760     TestQtailqElement obj_qe2 = {
 761         .b = false,
 762         .u8 = 65,
 763     };
 764
 765     QTAILQ_INIT(&obj_q.q);
 766     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
 767     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);
 768
 769     QEMUFile *fsave = open_test_file(true);
 770
 771     qemu_put_buffer(fsave, wire_q, sizeof(wire_q));
 772     g_assert(!qemu_file_get_error(fsave));
 773     qemu_fclose(fsave);
 774
 775     QEMUFile *fload = open_test_file(false);
 776     TestQtailq tgt;
 777
 778     QTAILQ_INIT(&tgt.q);
 779     vmstate_load_state(fload, &vmstate_q, &tgt, 1);
 780     char eof = qemu_get_byte(fload);
 781     g_assert(!qemu_file_get_error(fload));
 782     g_assert_cmpint(tgt.i16, ==, obj_q.i16);
 783     g_assert_cmpint(tgt.i32, ==, obj_q.i32);
 784     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
 785
 786     TestQtailqElement *qele_from = QTAILQ_FIRST(&obj_q.q);
 787     TestQtailqElement *qlast_from = QTAILQ_LAST(&obj_q.q);
 788     TestQtailqElement *qele_to = QTAILQ_FIRST(&tgt.q);
 789     TestQtailqElement *qlast_to = QTAILQ_LAST(&tgt.q);
 790
 791     while (1) {
 792         g_assert_cmpint(qele_to->b, ==, qele_from->b);
 793         g_assert_cmpint(qele_to->u8, ==, qele_from->u8);
 794         if ((qele_from == qlast_from) || (qele_to == qlast_to)) {
 795             break;
 796         }
 797         qele_from = QTAILQ_NEXT(qele_from, next);
 798         qele_to = QTAILQ_NEXT(qele_to, next);
 799     }
 800
 801     g_assert_cmpint((uintptr_t) qele_from, ==, (uintptr_t) qlast_from);
 802     g_assert_cmpint((uintptr_t) qele_to, ==, (uintptr_t) qlast_to);
 803
 804     /* clean up */
 805     TestQtailqElement *qele;
 806     while (!QTAILQ_EMPTY(&tgt.q)) {
 807         qele = QTAILQ_LAST(&tgt.q);
 808         QTAILQ_REMOVE(&tgt.q, qele, next);
 809         free(qele);
 810         qele = NULL;
 811     }
 812     qemu_fclose(fload);
 813 }
 814
 815 /* interval (key) */
 816 typedef struct TestGTreeInterval {
 817     uint64_t low;
 818     uint64_t high;
 819 } TestGTreeInterval;
 820
 821 #define VMSTATE_INTERVAL                               \
 822 {                                                      \
 823     .name = "interval",                                \
 824     .version_id = 1,                                   \
 825     .minimum_version_id = 1,                           \
 826     .fields = (VMStateField[]) {                       \
 827         VMSTATE_UINT64(low, TestGTreeInterval),        \
 828         VMSTATE_UINT64(high, TestGTreeInterval),       \
 829         VMSTATE_END_OF_LIST()                          \
 830     }                                                  \
 831 }
 832
 833 /* mapping (value) */
 834 typedef struct TestGTreeMapping {
 835     uint64_t phys_addr;
 836     uint32_t flags;
 837 } TestGTreeMapping;
 838
 839 #define VMSTATE_MAPPING                               \
 840 {                                                     \
 841     .name = "mapping",                                \
 842     .version_id = 1,                                  \
 843     .minimum_version_id = 1,                          \
 844     .fields = (VMStateField[]) {                      \
 845         VMSTATE_UINT64(phys_addr, TestGTreeMapping),  \
 846         VMSTATE_UINT32(flags, TestGTreeMapping),      \
 847         VMSTATE_END_OF_LIST()                         \
 848     },                                                \
 849 }
 850
 851 static const VMStateDescription vmstate_interval_mapping[2] = {
 852     VMSTATE_MAPPING,   /* value */
 853     VMSTATE_INTERVAL   /* key   */
 854 };
 855
 856 typedef struct TestGTreeDomain {
 857     int32_t  id;
 858     GTree    *mappings;
 859 } TestGTreeDomain;
 860
 861 typedef struct TestGTreeIOMMU {
 862     int32_t  id;
 863     GTree    *domains;
 864 } TestGTreeIOMMU;
 865
 866 /* Interval comparison function */
 867 static gint interval_cmp(gconstpointer a, gconstpointer b, gpointer user_data)
 868 {
 869     TestGTreeInterval *inta = (TestGTreeInterval *)a;
 870     TestGTreeInterval *intb = (TestGTreeInterval *)b;
 871
 872     if (inta->high < intb->low) {
 873         return -1;
 874     } else if (intb->high < inta->low) {
 875         return 1;
 876     } else {
 877         return 0;
 878     }
 879 }
 880
 881 /* ID comparison function */
 882 static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data)
 883 {
 884     uint ua = GPOINTER_TO_UINT(a);
 885     uint ub = GPOINTER_TO_UINT(b);
 886     return (ua > ub) - (ua < ub);
 887 }
 888
 889 static void destroy_domain(gpointer data)
 890 {
 891     TestGTreeDomain *domain = (TestGTreeDomain *)data;
 892
 893     g_tree_destroy(domain->mappings);
 894     g_free(domain);
 895 }
 896
 897 static int domain_preload(void *opaque)
 898 {
 899     TestGTreeDomain *domain = opaque;
 900
 901     domain->mappings = g_tree_new_full((GCompareDataFunc)interval_cmp,
 902                                        NULL, g_free, g_free);
 903     return 0;
 904 }
 905
 906 static int iommu_preload(void *opaque)
 907 {
 908     TestGTreeIOMMU *iommu = opaque;
 909
 910     iommu->domains = g_tree_new_full((GCompareDataFunc)int_cmp,
 911                                      NULL, NULL, destroy_domain);
 912     return 0;
 913 }
 914
 915 static const VMStateDescription vmstate_domain = {
 916     .name = "domain",
 917     .version_id = 1,
 918     .minimum_version_id = 1,
 919     .pre_load = domain_preload,
 920     .fields = (VMStateField[]) {
 921         VMSTATE_INT32(id, TestGTreeDomain),
 922         VMSTATE_GTREE_V(mappings, TestGTreeDomain, 1,
 923                         vmstate_interval_mapping,
 924                         TestGTreeInterval, TestGTreeMapping),
 925         VMSTATE_END_OF_LIST()
 926     }
 927 };
 928
 929 static const VMStateDescription vmstate_iommu = {
 930     .name = "iommu",
 931     .version_id = 1,
 932     .minimum_version_id = 1,
 933     .pre_load = iommu_preload,
 934     .fields = (VMStateField[]) {
 935         VMSTATE_INT32(id, TestGTreeIOMMU),
 936         VMSTATE_GTREE_DIRECT_KEY_V(domains, TestGTreeIOMMU, 1,
 937                                    &vmstate_domain, TestGTreeDomain),
 938         VMSTATE_END_OF_LIST()
 939     }
 940 };
 941
 942 uint8_t first_domain_dump[] = {
 943     /* id */
 944     0x00, 0x0, 0x0, 0x6,
 945     0x00, 0x0, 0x0, 0x2, /* 2 mappings */
 946     0x1, /* start of a */
 947     /* a */
 948     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
 949     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0xFF,
 950     /* map_a */
 951     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x00,
 952     0x00, 0x00, 0x00, 0x01,
 953     0x1, /* start of b */
 954     /* b */
 955     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00,
 956     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4F, 0xFF,
 957     /* map_b */
 958     0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x00,
 959     0x00, 0x00, 0x00, 0x02,
 960     0x0, /* end of gtree */
 961     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 962 };
 963
 964 static TestGTreeDomain *create_first_domain(void)
 965 {
 966     TestGTreeDomain *domain;
 967     TestGTreeMapping *map_a, *map_b;
 968     TestGTreeInterval *a, *b;
 969
 970     domain = g_malloc0(sizeof(TestGTreeDomain));
 971     domain->id = 6;
 972
 973     a = g_malloc0(sizeof(TestGTreeInterval));
 974     a->low = 0x1000;
 975     a->high = 0x1FFF;
 976
 977     b = g_malloc0(sizeof(TestGTreeInterval));
 978     b->low = 0x4000;
 979     b->high = 0x4FFF;
 980
 981     map_a = g_malloc0(sizeof(TestGTreeMapping));
 982     map_a->phys_addr = 0xa000;
 983     map_a->flags = 1;
 984
 985     map_b = g_malloc0(sizeof(TestGTreeMapping));
 986     map_b->phys_addr = 0xe0000;
 987     map_b->flags = 2;
 988
 989     domain->mappings = g_tree_new_full((GCompareDataFunc)interval_cmp, NULL,
 990                                         (GDestroyNotify)g_free,
 991                                         (GDestroyNotify)g_free);
 992     g_tree_insert(domain->mappings, a, map_a);
 993     g_tree_insert(domain->mappings, b, map_b);
 994     return domain;
 995 }
 996
 997 static void test_gtree_save_domain(void)
 998 {
 999     TestGTreeDomain *first_domain = create_first_domain();
1000
1001     save_vmstate(&vmstate_domain, first_domain);
1002     compare_vmstate(first_domain_dump, sizeof(first_domain_dump));
1003     destroy_domain(first_domain);
1004 }
1005
1006 struct match_node_data {
1007     GTree *tree;
1008     gpointer key;
1009     gpointer value;
1010 };
1011
1012 struct tree_cmp_data {
1013     GTree *tree1;
1014     GTree *tree2;
1015     GTraverseFunc match_node;
1016 };
1017
1018 static gboolean match_interval_mapping_node(gpointer key,
1019                                             gpointer value, gpointer data)
1020 {
1021     TestGTreeMapping *map_a, *map_b;
1022     TestGTreeInterval *a, *b;
1023     struct match_node_data *d = (struct match_node_data *)data;
1024     char *str = g_strdup_printf("dest");
1025
1026     g_free(str);
1027     a = (TestGTreeInterval *)key;
1028     b = (TestGTreeInterval *)d->key;
1029
1030     map_a = (TestGTreeMapping *)value;
1031     map_b = (TestGTreeMapping *)d->value;
1032
1033     assert(a->low == b->low);
1034     assert(a->high == b->high);
1035     assert(map_a->phys_addr == map_b->phys_addr);
1036     assert(map_a->flags == map_b->flags);
1037     g_tree_remove(d->tree, key);
1038     return true;
1039 }
1040
1041 static gboolean diff_tree(gpointer key, gpointer value, gpointer data)
1042 {
1043     struct tree_cmp_data *tp = (struct tree_cmp_data *)data;
1044     struct match_node_data d = {tp->tree2, key, value};
1045
1046     g_tree_foreach(tp->tree2, tp->match_node, &d);
1047     g_tree_remove(tp->tree1, key);
1048     return false;
1049 }
1050
1051 static void compare_trees(GTree *tree1, GTree *tree2,
1052                           GTraverseFunc function)
1053 {
1054     struct tree_cmp_data tp = {tree1, tree2, function};
1055
1056     g_tree_foreach(tree1, diff_tree, &tp);
1057     assert(g_tree_nnodes(tree1) == 0);
1058     assert(g_tree_nnodes(tree2) == 0);
1059 }
1060
1061 static void diff_domain(TestGTreeDomain *d1, TestGTreeDomain *d2)
1062 {
1063     assert(d1->id == d2->id);
1064     compare_trees(d1->mappings, d2->mappings, match_interval_mapping_node);
1065 }
1066
1067 static gboolean match_domain_node(gpointer key, gpointer value, gpointer data)
1068 {
1069     uint64_t id1, id2;
1070     TestGTreeDomain *d1, *d2;
1071     struct match_node_data *d = (struct match_node_data *)data;
1072
1073     id1 = (uint64_t)(uintptr_t)key;
1074     id2 = (uint64_t)(uintptr_t)d->key;
1075     d1 = (TestGTreeDomain *)value;
1076     d2 = (TestGTreeDomain *)d->value;
1077     assert(id1 == id2);
1078     diff_domain(d1, d2);
1079     g_tree_remove(d->tree, key);
1080     return true;
1081 }
1082
1083 static void diff_iommu(TestGTreeIOMMU *iommu1, TestGTreeIOMMU *iommu2)
1084 {
1085     assert(iommu1->id == iommu2->id);
1086     compare_trees(iommu1->domains, iommu2->domains, match_domain_node);
1087 }
1088
1089 static void test_gtree_load_domain(void)
1090 {
1091     TestGTreeDomain *dest_domain = g_malloc0(sizeof(TestGTreeDomain));
1092     TestGTreeDomain *orig_domain = create_first_domain();
1093     QEMUFile *fload, *fsave;
1094     char eof;
1095
1096     fsave = open_test_file(true);
1097     qemu_put_buffer(fsave, first_domain_dump, sizeof(first_domain_dump));
1098     g_assert(!qemu_file_get_error(fsave));
1099     qemu_fclose(fsave);
1100
1101     fload = open_test_file(false);
1102
1103     vmstate_load_state(fload, &vmstate_domain, dest_domain, 1);
1104     eof = qemu_get_byte(fload);
1105     g_assert(!qemu_file_get_error(fload));
1106     g_assert_cmpint(orig_domain->id, ==, dest_domain->id);
1107     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
1108
1109     diff_domain(orig_domain, dest_domain);
1110     destroy_domain(orig_domain);
1111     destroy_domain(dest_domain);
1112     qemu_fclose(fload);
1113 }
1114
1115 uint8_t iommu_dump[] = {
1116     /* iommu id */
1117     0x00, 0x0, 0x0, 0x7,
1118     0x00, 0x0, 0x0, 0x2, /* 2 domains */
1119     0x1,/* start of domain 5 */
1120         0x00, 0x00, 0x00, 0x00, 0x00, 0x0, 0x0, 0x5, /* key = 5 */
1121         0x00, 0x0, 0x0, 0x5, /* domain1 id */
1122         0x00, 0x0, 0x0, 0x1, /* 1 mapping */
1123         0x1, /* start of mappings */
1124             /* c */
1125             0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
1126             0x00, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF,
1127             /* map_c */
1128             0x00, 0x00, 0x00, 0x00, 0x0F, 0x00, 0x00, 0x00,
1129             0x00, 0x0, 0x0, 0x3,
1130             0x0, /* end of domain1 mappings*/
1131     0x1,/* start of domain 6 */
1132         0x00, 0x00, 0x00, 0x00, 0x00, 0x0, 0x0, 0x6, /* key = 6 */
1133         0x00, 0x0, 0x0, 0x6, /* domain6 id */
1134             0x00, 0x0, 0x0, 0x2, /* 2 mappings */
1135             0x1, /* start of a */
1136             /* a */
1137             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
1138             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0xFF,
1139             /* map_a */
1140             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x00,
1141             0x00, 0x00, 0x00, 0x01,
1142             0x1, /* start of b */
1143             /* b */
1144             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00,
1145             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4F, 0xFF,
1146             /* map_b */
1147             0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x00,
1148             0x00, 0x00, 0x00, 0x02,
1149             0x0, /* end of domain6 mappings*/
1150     0x0, /* end of domains */
1151     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
1152 };
1153
1154 static TestGTreeIOMMU *create_iommu(void)
1155 {
1156     TestGTreeIOMMU *iommu = g_malloc0(sizeof(TestGTreeIOMMU));
1157     TestGTreeDomain *first_domain = create_first_domain();
1158     TestGTreeDomain *second_domain;
1159     TestGTreeMapping *map_c;
1160     TestGTreeInterval *c;
1161
1162     iommu->id = 7;
1163     iommu->domains = g_tree_new_full((GCompareDataFunc)int_cmp, NULL,
1164                                      NULL,
1165                                      destroy_domain);
1166
1167     second_domain = g_malloc0(sizeof(TestGTreeDomain));
1168     second_domain->id = 5;
1169     second_domain->mappings = g_tree_new_full((GCompareDataFunc)interval_cmp,
1170                                               NULL,
1171                                               (GDestroyNotify)g_free,
1172                                               (GDestroyNotify)g_free);
1173
1174     g_tree_insert(iommu->domains, GUINT_TO_POINTER(6), first_domain);
1175     g_tree_insert(iommu->domains, (gpointer)0x0000000000000005, second_domain);
1176
1177     c = g_malloc0(sizeof(TestGTreeInterval));
1178     c->low = 0x1000000;
1179     c->high = 0x1FFFFFF;
1180
1181     map_c = g_malloc0(sizeof(TestGTreeMapping));
1182     map_c->phys_addr = 0xF000000;
1183     map_c->flags = 0x3;
1184
1185     g_tree_insert(second_domain->mappings, c, map_c);
1186     return iommu;
1187 }
1188
1189 static void destroy_iommu(TestGTreeIOMMU *iommu)
1190 {
1191     g_tree_destroy(iommu->domains);
1192     g_free(iommu);
1193 }
1194
1195 static void test_gtree_save_iommu(void)
1196 {
1197     TestGTreeIOMMU *iommu = create_iommu();
1198
1199     save_vmstate(&vmstate_iommu, iommu);
1200     compare_vmstate(iommu_dump, sizeof(iommu_dump));
1201     destroy_iommu(iommu);
1202 }
1203
1204 static void test_gtree_load_iommu(void)
1205 {
1206     TestGTreeIOMMU *dest_iommu = g_malloc0(sizeof(TestGTreeIOMMU));
1207     TestGTreeIOMMU *orig_iommu = create_iommu();
1208     QEMUFile *fsave, *fload;
1209     char eof;
1210     int ret;
1211
1212     fsave = open_test_file(true);
1213     qemu_put_buffer(fsave, iommu_dump, sizeof(iommu_dump));
1214     g_assert(!qemu_file_get_error(fsave));
1215     qemu_fclose(fsave);
1216
1217     fload = open_test_file(false);
1218     vmstate_load_state(fload, &vmstate_iommu, dest_iommu, 1);
1219     ret = qemu_file_get_error(fload);
1220     eof = qemu_get_byte(fload);
1221     ret = qemu_file_get_error(fload);
1222     g_assert(!ret);
1223     g_assert_cmpint(orig_iommu->id, ==, dest_iommu->id);
1224     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
1225
1226     diff_iommu(orig_iommu, dest_iommu);
1227     destroy_iommu(orig_iommu);
1228     destroy_iommu(dest_iommu);
1229     qemu_fclose(fload);
1230 }
1231
1232 typedef struct TmpTestStruct {
1233     TestStruct *parent;
1234     int64_t diff;
1235 } TmpTestStruct;
1236
1237 static int tmp_child_pre_save(void *opaque)
1238 {
1239     struct TmpTestStruct *tts = opaque;
1240
1241     tts->diff = tts->parent->b - tts->parent->a;
1242
1243     return 0;
1244 }
1245
1246 static int tmp_child_post_load(void *opaque, int version_id)
1247 {
1248     struct TmpTestStruct *tts = opaque;
1249
1250     tts->parent->b = tts->parent->a + tts->diff;
1251
1252     return 0;
1253 }
1254
1255 static const VMStateDescription vmstate_tmp_back_to_parent = {
1256     .name = "test/tmp_child_parent",
1257     .fields = (VMStateField[]) {
1258         VMSTATE_UINT64(f, TestStruct),
1259         VMSTATE_END_OF_LIST()
1260     }
1261 };
1262
1263 static const VMStateDescription vmstate_tmp_child = {
1264     .name = "test/tmp_child",
1265     .pre_save = tmp_child_pre_save,
1266     .post_load = tmp_child_post_load,
1267     .fields = (VMStateField[]) {
1268         VMSTATE_INT64(diff, TmpTestStruct),
1269         VMSTATE_STRUCT_POINTER(parent, TmpTestStruct,
1270                                vmstate_tmp_back_to_parent, TestStruct),
1271         VMSTATE_END_OF_LIST()
1272     }
1273 };
1274
1275 static const VMStateDescription vmstate_with_tmp = {
1276     .name = "test/with_tmp",
1277     .version_id = 1,
1278     .fields = (VMStateField[]) {
1279         VMSTATE_UINT32(a, TestStruct),
1280         VMSTATE_UINT64(d, TestStruct),
1281         VMSTATE_WITH_TMP(TestStruct, TmpTestStruct, vmstate_tmp_child),
1282         VMSTATE_END_OF_LIST()
1283     }
1284 };
1285
1286 static void obj_tmp_copy(void *target, void *source)
1287 {
1288     memcpy(target, source, sizeof(TestStruct));
1289 }
1290
1291 static void test_tmp_struct(void)
1292 {
1293     TestStruct obj, obj_clone;
1294
1295     uint8_t const wire_with_tmp[] = {
1296         /* u32 a */ 0x00, 0x00, 0x00, 0x02,
1297         /* u64 d */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
1298         /* diff  */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
1299         /* u64 f */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
1300         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
1301     };
1302
1303     memset(&obj, 0, sizeof(obj));
1304     obj.a = 2;
1305     obj.b = 4;
1306     obj.d = 1;
1307     obj.f = 8;
1308     save_vmstate(&vmstate_with_tmp, &obj);
1309
1310     compare_vmstate(wire_with_tmp, sizeof(wire_with_tmp));
1311
1312     memset(&obj, 0, sizeof(obj));
1313     SUCCESS(load_vmstate(&vmstate_with_tmp, &obj, &obj_clone,
1314                          obj_tmp_copy, 1, wire_with_tmp,
1315                          sizeof(wire_with_tmp)));
1316     g_assert_cmpint(obj.a, ==, 2); /* From top level vmsd */
1317     g_assert_cmpint(obj.b, ==, 4); /* from the post_load */
1318     g_assert_cmpint(obj.d, ==, 1); /* From top level vmsd */
1319     g_assert_cmpint(obj.f, ==, 8); /* From the child->parent */
1320 }
1321
1322 int main(int argc, char **argv)
1323 {
1324     temp_fd = mkstemp(temp_file);
1325
1326     module_call_init(MODULE_INIT_QOM);
1327
1328     g_setenv("QTEST_SILENT_ERRORS", "1", 1);
1329
1330     g_test_init(&argc, &argv, NULL);
1331     g_test_add_func("/vmstate/simple/primitive", test_simple_primitive);
1332     g_test_add_func("/vmstate/simple/array", test_simple_array);
1333     g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
1334     g_test_add_func("/vmstate/versioned/load/v2", test_load_v2);
1335     g_test_add_func("/vmstate/field_exists/load/noskip", test_load_noskip);
1336     g_test_add_func("/vmstate/field_exists/load/skip", test_load_skip);
1337     g_test_add_func("/vmstate/field_exists/save/noskip", test_save_noskip);
1338     g_test_add_func("/vmstate/field_exists/save/skip", test_save_skip);
1339     g_test_add_func("/vmstate/array/ptr/str/no0/save",
1340                     test_arr_ptr_str_no0_save);
1341     g_test_add_func("/vmstate/array/ptr/str/no0/load",
1342                     test_arr_ptr_str_no0_load);
1343     g_test_add_func("/vmstate/array/ptr/str/0/save", test_arr_ptr_str_0_save);
1344     g_test_add_func("/vmstate/array/ptr/str/0/load",
1345                     test_arr_ptr_str_0_load);
1346     g_test_add_func("/vmstate/array/ptr/prim/0/save",
1347                     test_arr_ptr_prim_0_save);
1348     g_test_add_func("/vmstate/array/ptr/prim/0/load",
1349                     test_arr_ptr_prim_0_load);
1350     g_test_add_func("/vmstate/qtailq/save/saveq", test_save_q);
1351     g_test_add_func("/vmstate/qtailq/load/loadq", test_load_q);
1352     g_test_add_func("/vmstate/gtree/save/savedomain", test_gtree_save_domain);
1353     g_test_add_func("/vmstate/gtree/load/loaddomain", test_gtree_load_domain);
1354     g_test_add_func("/vmstate/gtree/save/saveiommu", test_gtree_save_iommu);
1355     g_test_add_func("/vmstate/gtree/load/loadiommu", test_gtree_load_iommu);
1356     g_test_add_func("/vmstate/tmp_struct", test_tmp_struct);
1357     g_test_run();
1358
1359     close(temp_fd);
1360     unlink(temp_file);
1361
1362     return 0;
1363 }