1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
content / browser / site_instance_impl.cc [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/site_instance_impl.h"
#include <string>
#include <tuple>
#include "base/containers/contains.h"
#include "base/debug/crash_logging.h"
#include "base/debug/dump_without_crashing.h"
#include "base/lazy_instance.h"
#include "base/trace_event/typed_macros.h"
#include "content/browser/bad_message.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/isolated_origin_util.h"
#include "content/browser/isolation_context.h"
#include "content/browser/process_lock.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/site_instance_group.h"
#include "content/browser/storage_partition_impl.h"
#include "content/common/features.h"
#include "content/public/browser/browser_or_resource_context.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/site_isolation_policy.h"
#include "content/public/browser/web_ui_controller_factory.h"
#include "content/public/common/content_client.h"
#include "content/public/common/url_constants.h"
#include "content/public/common/url_utils.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "third_party/blink/public/common/chrome_debug_urls.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/perfetto/include/perfetto/tracing/traced_value.h"
#include "url/origin.h"
namespace content {
namespace {
// Constant used to mark two call sites that must always agree on whether
// the default SiteInstance is allowed.
constexpr bool kCreateForURLAllowsDefaultSiteInstance = true;
// Asks the embedder whether effective URLs should be used when determining if
// |dest_url| should end up in |site_instance|.
// This is used to keep same-site scripting working for hosted apps.
bool ShouldCompareEffectiveURLs(BrowserContext* browser_context,
SiteInstanceImpl* site_instance,
bool for_outermost_main_frame,
const GURL& dest_url) {
return site_instance->IsDefaultSiteInstance() ||
GetContentClient()
->browser()
->ShouldCompareEffectiveURLsForSiteInstanceSelection(
browser_context, site_instance, for_outermost_main_frame,
site_instance->original_url(), dest_url);
}
SiteInstanceId::Generator g_site_instance_id_generator;
} // namespace
// static
const GURL& SiteInstanceImpl::GetDefaultSiteURL() {
struct DefaultSiteURL {
const GURL url = GURL("http://unisolated.invalid");
};
static base::LazyInstance<DefaultSiteURL>::Leaky default_site_url =
LAZY_INSTANCE_INITIALIZER;
return default_site_url.Get().url;
}
class SiteInstanceImpl::DefaultSiteInstanceState {
public:
void AddSiteInfo(const SiteInfo& site_info) {
default_site_url_set_.insert(site_info.site_url());
}
bool ContainsSite(const GURL& site_url) {
return base::Contains(default_site_url_set_, site_url);
}
private:
// Keeps track of the site URLs that have been mapped to the default
// SiteInstance.
// TODO(wjmaclean): Revise this to store SiteInfos instead of GURLs.
std::set<GURL> default_site_url_set_;
};
SiteInstanceImpl::SiteInstanceImpl(BrowsingInstance* browsing_instance)
: id_(g_site_instance_id_generator.GenerateNextId()),
browsing_instance_(browsing_instance),
can_associate_with_spare_process_(true),
site_info_(browsing_instance->isolation_context()
.browser_or_resource_context()
.ToBrowserContext()),
has_site_(false),
process_reuse_policy_(ProcessReusePolicy::DEFAULT),
is_for_service_worker_(false),
process_assignment_(SiteInstanceProcessAssignment::UNKNOWN) {
DCHECK(browsing_instance);
}
SiteInstanceImpl::~SiteInstanceImpl() {
if (destruction_callback_for_testing_) {
std::move(destruction_callback_for_testing_).Run();
}
// Now that no one is referencing us, we can safely remove ourselves from
// the BrowsingInstance. Any future visits to a page from this site
// (within the same BrowsingInstance) can safely create a new SiteInstance.
if (has_site_)
browsing_instance_->UnregisterSiteInstance(this);
if (has_group()) {
group()->RemoveSiteInstance(this);
ResetSiteInstanceGroup();
}
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::Create(
BrowserContext* browser_context) {
DCHECK(browser_context);
return base::WrapRefCounted(new SiteInstanceImpl(new BrowsingInstance(
browser_context, WebExposedIsolationInfo::CreateNonIsolated(),
/*is_guest=*/false, /*is_fenced=*/false,
/*is_fixed_storage_partition=*/false,
/*coop_related_group=*/nullptr, /*common_coop_origin=*/std::nullopt)));
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::CreateForUrlInfo(
BrowserContext* browser_context,
const UrlInfo& url_info,
bool is_guest,
bool is_fenced,
bool is_fixed_storage_partition) {
DCHECK(url_info.is_sandboxed ||
url_info.unique_sandbox_id == UrlInfo::kInvalidUniqueSandboxId);
CHECK(!is_guest || url_info.storage_partition_config.has_value());
DCHECK(browser_context);
// This will create a new SiteInstance and BrowsingInstance.
scoped_refptr<BrowsingInstance> instance(new BrowsingInstance(
browser_context,
url_info.web_exposed_isolation_info.value_or(
WebExposedIsolationInfo::CreateNonIsolated()),
is_guest, is_fenced, is_fixed_storage_partition,
/*coop_related_group=*/nullptr, url_info.common_coop_origin));
// Note: The |allow_default_instance| value used here MUST match the value
// used in DoesSiteForURLMatch().
return instance->GetSiteInstanceForURL(
url_info, kCreateForURLAllowsDefaultSiteInstance);
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::CreateForServiceWorker(
BrowserContext* browser_context,
const UrlInfo& url_info,
bool can_reuse_process,
bool is_guest,
bool is_fenced) {
DCHECK(!url_info.url.SchemeIs(kChromeErrorScheme));
DCHECK(url_info.storage_partition_config.has_value());
// This will create a new SiteInstance and BrowsingInstance.
// TODO(crbug.com/40186710): Verify that having different common COOP
// origins does not hinder the ability of a ServiceWorker to share its page's
// process.
scoped_refptr<BrowsingInstance> instance(new BrowsingInstance(
browser_context,
url_info.web_exposed_isolation_info.value_or(
WebExposedIsolationInfo::CreateNonIsolated()),
is_guest, is_fenced,
// It should be safe to just default this to true since the
// BrowsingInstance is not shared with frames, and there are no
// navigations happening in service workers.
/*is_fixed_storage_partition=*/true,
/*coop_related_group=*/nullptr, url_info.common_coop_origin));
// We do NOT want to allow the default site instance here because workers
// need to be kept separate from other sites.
scoped_refptr<SiteInstanceImpl> site_instance =
instance->GetSiteInstanceForURL(url_info,
/* allow_default_instance */ false);
DCHECK(!site_instance->GetSiteInfo().is_error_page());
DCHECK_EQ(site_instance->IsGuest(), is_guest);
site_instance->is_for_service_worker_ = true;
// Attempt to reuse a renderer process if possible. Note that in the
// <webview> case, process reuse isn't currently supported and a new
// process will always be created (https://crbug.com/752667).
DCHECK(site_instance->process_reuse_policy() == ProcessReusePolicy::DEFAULT ||
site_instance->process_reuse_policy() ==
ProcessReusePolicy::PROCESS_PER_SITE);
if (can_reuse_process) {
site_instance->set_process_reuse_policy(
ProcessReusePolicy::REUSE_PENDING_OR_COMMITTED_SITE_WORKER);
}
return site_instance;
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::CreateForGuest(
BrowserContext* browser_context,
const StoragePartitionConfig& partition_config) {
DCHECK(browser_context);
DCHECK(!partition_config.is_default());
auto guest_site_info =
SiteInfo::CreateForGuest(browser_context, partition_config);
scoped_refptr<SiteInstanceImpl> site_instance =
base::WrapRefCounted(new SiteInstanceImpl(new BrowsingInstance(
browser_context, guest_site_info.web_exposed_isolation_info(),
/*is_guest=*/true,
/*is_fenced=*/false,
/*is_fixed_storage_partition=*/true,
/*coop_related_group=*/nullptr,
/*common_coop_origin=*/std::nullopt)));
site_instance->SetSiteInfoInternal(guest_site_info);
return site_instance;
}
// static
scoped_refptr<SiteInstanceImpl>
SiteInstanceImpl::CreateForFixedStoragePartition(
BrowserContext* browser_context,
const GURL& url,
const StoragePartitionConfig& partition_config) {
CHECK(browser_context);
CHECK(!partition_config.is_default());
return SiteInstanceImpl::CreateForUrlInfo(
browser_context,
UrlInfo(UrlInfoInit(url).WithStoragePartitionConfig(partition_config)),
/*is_guest=*/false,
/*is_fenced=*/false, /*is_fixed_storage_partition=*/true);
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::CreateForFencedFrame(
SiteInstanceImpl* embedder_site_instance) {
DCHECK(embedder_site_instance);
BrowserContext* browser_context = embedder_site_instance->GetBrowserContext();
bool should_isolate_fenced_frames =
SiteIsolationPolicy::IsProcessIsolationForFencedFramesEnabled();
scoped_refptr<SiteInstanceImpl> site_instance =
base::WrapRefCounted(new SiteInstanceImpl(new BrowsingInstance(
browser_context, embedder_site_instance->GetWebExposedIsolationInfo(),
embedder_site_instance->IsGuest(),
/*is_fenced=*/should_isolate_fenced_frames,
embedder_site_instance->IsFixedStoragePartition(),
/*coop_related_group=*/nullptr,
/*common_coop_origin=*/std::nullopt)));
// Give the new fenced frame SiteInstance the same site url as its embedder's
// SiteInstance to allow it to reuse its embedder's process. We avoid doing
// this in the default SiteInstance case as the url will be invalid; process
// reuse will still happen below though, as the embedder's SiteInstance's
// process will not be locked to any site.
// Note: Even when process isolation for fenced frames is enabled, we will
// still be able to reuse the embedder's process below, because we set its
// SiteInfo to be the embedder's SiteInfo, and |is_fenced| will be false. The
// process will change after the first navigation (the new SiteInstance will
// have a SiteInfo with is_fenced set to true).
if (!embedder_site_instance->IsDefaultSiteInstance()) {
site_instance->SetSite(embedder_site_instance->GetSiteInfo());
} else if (embedder_site_instance->IsGuest()) {
// For guests, in the case where the embedder is not a default SiteInstance,
// we reuse the embedder's SiteInfo above. When the embedder is
// a default SiteInstance, we explicitly create a SiteInfo through
// CreateForGuest.
// TODO(crbug.com/40230422): When we support fenced frame process isolation
// with partial or no site isolation modes, we will be able to reach this
// code path and will need to also set is_fenced for the SiteInfo created
// below.
DCHECK(!should_isolate_fenced_frames);
site_instance->SetSite(SiteInfo::CreateForGuest(
browser_context, embedder_site_instance->GetStoragePartitionConfig()));
}
DCHECK_EQ(embedder_site_instance->IsGuest(), site_instance->IsGuest());
site_instance->ReuseExistingProcessIfPossible(
embedder_site_instance->GetProcess());
return site_instance;
}
// static
scoped_refptr<SiteInstanceImpl>
SiteInstanceImpl::CreateReusableInstanceForTesting(
BrowserContext* browser_context,
const GURL& url) {
DCHECK(browser_context);
// This will create a new SiteInstance and BrowsingInstance.
scoped_refptr<BrowsingInstance> instance(new BrowsingInstance(
browser_context, WebExposedIsolationInfo::CreateNonIsolated(),
/*is_guest=*/false, /*is_fenced=*/false,
/*is_fixed_storage_partition=*/false,
/*coop_related_group=*/nullptr,
/*common_coop_origin=*/std::nullopt));
auto site_instance = instance->GetSiteInstanceForURL(
UrlInfo(UrlInfoInit(url)), /* allow_default_instance */ false);
site_instance->set_process_reuse_policy(
ProcessReusePolicy::REUSE_PENDING_OR_COMMITTED_SITE_SUBFRAME);
return site_instance;
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::CreateForTesting(
BrowserContext* browser_context,
const GURL& url) {
DCHECK(browser_context);
return SiteInstanceImpl::CreateForUrlInfo(
browser_context, UrlInfo::CreateForTesting(url),
/*is_guest=*/false,
/*is_fenced=*/false,
/*is_fixed_storage_partition=*/false);
}
// static
bool SiteInstanceImpl::ShouldAssignSiteForUrlInfo(const UrlInfo& url_info) {
// Only empty document schemes can leave SiteInstances unassigned.
if (!base::Contains(url::GetEmptyDocumentSchemes(), url_info.url.scheme())) {
return true;
}
if (url_info.url.SchemeIs(url::kAboutScheme)) {
// TODO(alexmos): Currently, we force about: URLs that are not about:blank
// to assign a site. This has been the legacy behavior, and it's unclear
// whether this matters one way or another, so we can consider changing
// this if there's a good motivation.
if (!url_info.url.IsAboutBlank()) {
return true;
}
// Check if the UrlInfo carries an inherited origin for about:blank, such
// as with a renderer-initiated about:blank navigation where the origin is
// taken from the navigation's initiator. In such cases, the SiteInstance
// assignment must also honor a valid initiator origin (which could require
// a dedicated process), and hence it cannot be left unassigned.
//
// Note that starting an about:blank navigation from an opaque unique
// origin is safe to leave unassigned. Some Android tests currently rely on
// that behavior.
if (url_info.origin.has_value() &&
url_info.origin->GetTupleOrPrecursorTupleIfOpaque().IsValid()) {
return true;
}
// Otherwise, it is ok for about:blank to not "use up" a new SiteInstance.
// The SiteInstance can still be used for a normal web site. For example,
// this is used for newly-created tabs.
return false;
}
// Do not assign a site for other empty document schemes. One notable use of
// this is for Android's native NTP, which uses the chrome-native: scheme.
return false;
}
SiteInstanceId SiteInstanceImpl::GetId() {
return id_;
}
BrowsingInstanceId SiteInstanceImpl::GetBrowsingInstanceId() {
return browsing_instance_->isolation_context().browsing_instance_id();
}
const IsolationContext& SiteInstanceImpl::GetIsolationContext() {
return browsing_instance_->isolation_context();
}
RenderProcessHost* SiteInstanceImpl::GetSiteInstanceGroupProcessIfAvailable() {
return browsing_instance_->site_instance_group_manager()
.GetExistingGroupProcess(this);
}
bool SiteInstanceImpl::IsDefaultSiteInstance() const {
return default_site_instance_state_ != nullptr;
}
void SiteInstanceImpl::AddSiteInfoToDefault(const SiteInfo& site_info) {
DCHECK(IsDefaultSiteInstance());
default_site_instance_state_->AddSiteInfo(site_info);
}
bool SiteInstanceImpl::IsSiteInDefaultSiteInstance(const GURL& site_url) const {
DCHECK(IsDefaultSiteInstance());
return default_site_instance_state_->ContainsSite(site_url);
}
// static
BrowsingInstanceId SiteInstanceImpl::NextBrowsingInstanceId() {
return BrowsingInstance::NextBrowsingInstanceId();
}
bool SiteInstanceImpl::HasProcess() {
if (has_group())
return true;
// If we would use process-per-site for this site, also check if there is an
// existing process that we would use if GetProcess() were called.
if (ShouldUseProcessPerSite() &&
RenderProcessHostImpl::GetSoleProcessHostForSite(GetIsolationContext(),
site_info_)) {
return true;
}
return false;
}
RenderProcessHost* SiteInstanceImpl::GetProcess() {
// Create a new SiteInstanceGroup and RenderProcessHost if there isn't one.
// All SiteInstances within a SiteInstanceGroup share a process and
// AgentSchedulingGroupHost. A group must have a process. If the process gets
// destructed, `site_instance_group_` will get cleared, and another one with a
// new process will be assigned the next time GetProcess() gets called.
if (!has_group()) {
// Check if the ProcessReusePolicy should be updated.
if (ShouldUseProcessPerSite()) {
process_reuse_policy_ = ProcessReusePolicy::PROCESS_PER_SITE;
} else if (process_reuse_policy_ == ProcessReusePolicy::PROCESS_PER_SITE) {
process_reuse_policy_ = ProcessReusePolicy::DEFAULT;
}
SetProcessInternal(
RenderProcessHostImpl::GetProcessHostForSiteInstance(this));
}
DCHECK(site_instance_group_);
return site_instance_group_->process();
}
SiteInstanceGroupId SiteInstanceImpl::GetSiteInstanceGroupId() {
return has_group() ? site_instance_group_->GetId() : SiteInstanceGroupId(0);
}
bool SiteInstanceImpl::ShouldUseProcessPerSite() const {
BrowserContext* browser_context = browsing_instance_->GetBrowserContext();
return has_site_ && site_info_.ShouldUseProcessPerSite(browser_context);
}
void SiteInstanceImpl::ReuseExistingProcessIfPossible(
RenderProcessHost* existing_process) {
if (HasProcess())
return;
// We should not reuse `existing_process` if the destination uses
// process-per-site. Note that this includes the case where the process for
// the site is not there yet (so we're going to create a new process). Note
// also that this does not apply for the reverse case: if the existing process
// is used for a process-per-site site, it is ok to reuse this for the new
// page (regardless of the site).
if (ShouldUseProcessPerSite())
return;
// Do not reuse the process if it's not suitable for this SiteInstance. For
// example, this won't allow reusing a process if it's locked to a site that's
// different from this SiteInstance's site.
if (!RenderProcessHostImpl::MayReuseAndIsSuitable(existing_process, this)) {
return;
}
// TODO(crbug.com/40676483): Don't try to reuse process if either of the
// SiteInstances are cross-origin isolated (uses COOP/COEP).
SetProcessInternal(existing_process);
}
void SiteInstanceImpl::SetProcessInternal(RenderProcessHost* process) {
if (!site_instance_group_) {
site_instance_group_ = base::WrapRefCounted(
new SiteInstanceGroup(browsing_instance(), process));
site_instance_group_->AddSiteInstance(this);
}
LockProcessIfNeeded();
// If we are using process-per-site, we need to register this process
// for the current site so that we can find it again. (If no site is set
// at this time, we will register it in SetSite().)
if (process_reuse_policy_ == ProcessReusePolicy::PROCESS_PER_SITE &&
has_site_) {
RenderProcessHostImpl::RegisterSoleProcessHostForSite(
site_instance_group_->process(), this);
}
TRACE_EVENT2("navigation", "SiteInstanceImpl::SetProcessInternal", "site id",
id_.value(), "process id",
site_instance_group_->process()->GetID());
// Inform the embedder if the SiteInstance now has both the process and the
// site assigned. Note that this can be called either here or when setting
// the site in SetSiteInfoInternal() below. This could be called multiple
// times if the SiteInstance's RenderProcessHost goes away and a new one
// replaces it later.
if (has_site_) {
GetContentClient()->browser()->SiteInstanceGotProcessAndSite(this);
}
// Notify SiteInstanceGroupManager that the process was set on this
// SiteInstance. This must be called after LockProcessIfNeeded() because
// the SiteInstanceGroupManager does suitability checks that use the lock.
browsing_instance_->site_instance_group_manager().OnProcessSet(this);
}
bool SiteInstanceImpl::CanAssociateWithSpareProcess() {
return can_associate_with_spare_process_;
}
void SiteInstanceImpl::PreventAssociationWithSpareProcess() {
can_associate_with_spare_process_ = false;
}
void SiteInstanceImpl::SetSite(const UrlInfo& url_info) {
const GURL& url = url_info.url;
// TODO(creis): Consider calling ShouldAssignSiteForURL internally, rather
// than before multiple call sites. See https://crbug.com/949220.
TRACE_EVENT2("navigation", "SiteInstanceImpl::SetSite", "site id",
id_.value(), "url", url.possibly_invalid_spec());
// A SiteInstance's site should not change.
// TODO(creis): When following links or script navigations, we can currently
// render pages from other sites in this SiteInstance. This will eventually
// be fixed, but until then, we should still not set the site of a
// SiteInstance more than once.
DCHECK(!has_site_);
original_url_ = url;
// Convert |url| into an appropriate SiteInfo that can be passed to
// SetSiteInfoInternal(). We must do this transformation for any arbitrary
// URL we get from a user, a navigation, or script.
SetSiteInfoInternal(browsing_instance_->GetSiteInfoForURL(
url_info, /* allow_default_instance */ false));
}
void SiteInstanceImpl::SetSite(const SiteInfo& site_info) {
TRACE_EVENT2("navigation", "SiteInstanceImpl::SetSite", "site id",
id_.value(), "siteinfo", site_info.GetDebugString());
DCHECK(!has_site_);
SetSiteInfoInternal(site_info);
}
void SiteInstanceImpl::SetSiteInfoToDefault(
const StoragePartitionConfig& storage_partition_config) {
TRACE_EVENT1("navigation", "SiteInstanceImpl::SetSiteInfoToDefault",
"site id", id_.value());
DCHECK(!has_site_);
default_site_instance_state_ = std::make_unique<DefaultSiteInstanceState>();
original_url_ = GetDefaultSiteURL();
SetSiteInfoInternal(SiteInfo::CreateForDefaultSiteInstance(
GetIsolationContext(), storage_partition_config,
GetWebExposedIsolationInfo()));
}
void SiteInstanceImpl::SetSiteInfoInternal(const SiteInfo& site_info) {
// TODO(acolwell): Add logic to validate |site_url| and |lock_url| are valid.
DCHECK(!has_site_);
CHECK_EQ(site_info.web_exposed_isolation_info(),
browsing_instance_->web_exposed_isolation_info());
if (verify_storage_partition_info_) {
auto old_partition_config = site_info_.storage_partition_config();
auto new_partition_config = site_info.storage_partition_config();
CHECK_EQ(old_partition_config, new_partition_config);
}
// Remember that this SiteInstance has been used to load a URL, even if the
// URL is invalid.
has_site_ = true;
site_info_ = site_info;
// Now that we have a site, register it with the BrowsingInstance. This
// ensures that we won't create another SiteInstance for this site within
// the same BrowsingInstance, because all same-site pages within a
// BrowsingInstance can script each other.
browsing_instance_->RegisterSiteInstance(this);
if (site_info_.requires_origin_keyed_process() &&
!site_info_.requires_origin_keyed_process_by_default()) {
// Track this origin's isolation in the current BrowsingInstance, if it has
// received an origin-keyed process due to an explicit opt-in. This is
// needed to consistently isolate future navigations to this origin in this
// BrowsingInstance, even if its opt-in status changes later.
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
url::Origin origin(url::Origin::Create(site_info_.process_lock_url()));
// This is one of two places that origins can be marked as opted-in, the
// other is
// NavigationRequest::AddSameProcessOriginAgentClusterStateIfNecessary().
// This site handles the case where OAC isolation gets a separate process.
// In future, when SiteInstance Groups are complete, this may revert to
// being the only call site.
policy->AddOriginIsolationStateForBrowsingInstance(
browsing_instance_->isolation_context(), origin,
true /* is_origin_agent_cluster */,
true /* requires_origin_keyed_process */);
}
if (site_info_.does_site_request_dedicated_process_for_coop()) {
// If there was a request to process-isolate `site_info_` from COOP
// headers, notify ChildProcessSecurityPolicy about the new isolated origin
// in the current BrowsingInstance. Note that we must convert the origin
// to a site to avoid breaking document.domain. Typically, the process
// lock URL would already correspond to a site (since we isolate sites, not
// origins, by default), but this isn't always the case. For example, this
// SiteInstance could be isolated with the origin granularity due to
// Origin-Agent-Cluster (see site_info_.requires_origin_keyed_process()
// above).
url::Origin origin(url::Origin::Create(site_info_.process_lock_url()));
GURL site(SiteInfo::GetSiteForOrigin(origin));
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
policy->AddCoopIsolatedOriginForBrowsingInstance(
browsing_instance_->isolation_context(), url::Origin::Create(site),
ChildProcessSecurityPolicy::IsolatedOriginSource::WEB_TRIGGERED);
}
// Update the process reuse policy based on the site.
bool should_use_process_per_site = ShouldUseProcessPerSite();
if (should_use_process_per_site)
process_reuse_policy_ = ProcessReusePolicy::PROCESS_PER_SITE;
if (has_group()) {
LockProcessIfNeeded();
// Inform the embedder if the SiteInstance now has both the process and the
// site assigned. Note that this can be called either here or when setting
// the process in SetProcessInternal() above.
GetContentClient()->browser()->SiteInstanceGotProcessAndSite(this);
// Ensure the process is registered for this site if necessary.
if (should_use_process_per_site) {
RenderProcessHostImpl::RegisterSoleProcessHostForSite(
site_instance_group_->process(), this);
}
}
// Notify SiteInstanceGroupManager that the SiteInfo was set on this
// SiteInstance. This must be called after LockProcessIfNeeded() because
// the SiteInstanceGroupManager does suitability checks that use the lock.
browsing_instance_->site_instance_group_manager().OnSiteInfoSet(this,
has_group());
}
void SiteInstanceImpl::ConvertToDefaultOrSetSite(const UrlInfo& url_info) {
DCHECK(!has_site_);
if (!browsing_instance_->HasDefaultSiteInstance()) {
// We want to set a SiteInfo in this SiteInstance, from information in a
// UrlInfo. The WebExposedIsolationInfo must be compatible for this function
// to not violate WebExposedIsolationInfo isolation invariant within a
// BrowsingInstance.
DCHECK(WebExposedIsolationInfo::AreCompatible(
url_info.web_exposed_isolation_info, GetWebExposedIsolationInfo()));
// If |url_info| has a null WebExposedIsolationInfo, it is compatible with
// any isolation state. We reuse the isolation state of the browsing
// instance for the SiteInfo, to preserve the invariant.
UrlInfo updated_url_info = url_info;
updated_url_info.web_exposed_isolation_info = GetWebExposedIsolationInfo();
const SiteInfo site_info =
SiteInfo::Create(GetIsolationContext(), updated_url_info);
if (CanBePlacedInDefaultSiteInstance(GetIsolationContext(),
updated_url_info.url, site_info)) {
SetSiteInfoToDefault(site_info.storage_partition_config());
AddSiteInfoToDefault(site_info);
DCHECK(browsing_instance_->HasDefaultSiteInstance());
return;
}
}
SetSite(url_info);
}
SiteInstanceProcessAssignment
SiteInstanceImpl::GetLastProcessAssignmentOutcome() {
return process_assignment_;
}
const GURL& SiteInstanceImpl::GetSiteURL() {
return site_info_.site_url();
}
const SiteInfo& SiteInstanceImpl::GetSiteInfo() {
return site_info_;
}
SiteInfo SiteInstanceImpl::DeriveSiteInfo(
const UrlInfo& url_info,
bool is_related,
bool disregard_web_exposed_isolation_info) {
if (is_related) {
return browsing_instance_->GetSiteInfoForURL(
url_info, /* allow_default_instance */ true);
}
// If we care about WebExposedIsolationInfo, verify that the passed in
// WebExposedIsolationInfo is compatible with the internal state. If they
// don't, the semantics of the function would be unclear.
if (!disregard_web_exposed_isolation_info) {
DCHECK(WebExposedIsolationInfo::AreCompatible(
url_info.web_exposed_isolation_info, GetWebExposedIsolationInfo()));
}
// At this stage, we either have two values of WebExposedIsolationInfo that
// can be resolved into one, for example when UrlInfo has an empty
// WebExposedIsolationInfo and it is matchable with any isolation state. Or we
// are trying to compute other state, regardless of what the passed in
// WebExposedIsolationInfos are. In both cases, we simply use the
// SiteInstance's value.
UrlInfo overridden_url_info = url_info;
overridden_url_info.web_exposed_isolation_info = GetWebExposedIsolationInfo();
// Keep the same StoragePartition when the storage partition is fixed (e.g.
// for <webview>).
if (IsFixedStoragePartition()) {
overridden_url_info.storage_partition_config =
GetSiteInfo().storage_partition_config();
}
return SiteInfo::Create(GetIsolationContext(), overridden_url_info);
}
bool SiteInstanceImpl::HasSite() const {
return has_site_;
}
bool SiteInstanceImpl::HasRelatedSiteInstance(const SiteInfo& site_info) {
return browsing_instance_->HasSiteInstance(site_info);
}
scoped_refptr<SiteInstance> SiteInstanceImpl::GetRelatedSiteInstance(
const GURL& url) {
return GetRelatedSiteInstanceImpl(UrlInfo(UrlInfoInit(url)));
}
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::GetRelatedSiteInstanceImpl(
const UrlInfo& url_info) {
return browsing_instance_->GetSiteInstanceForURL(
url_info, /* allow_default_instance */ true);
}
scoped_refptr<SiteInstanceImpl>
SiteInstanceImpl::GetCoopRelatedSiteInstanceImpl(const UrlInfo& url_info) {
return browsing_instance_->GetCoopRelatedSiteInstanceForURL(
url_info, /* allow_default_instance */ true);
}
AgentSchedulingGroupHost& SiteInstanceImpl::GetOrCreateAgentSchedulingGroup() {
if (!site_instance_group_)
GetProcess();
return site_instance_group_->agent_scheduling_group();
}
void SiteInstanceImpl::ResetSiteInstanceGroup() {
site_instance_group_.reset();
}
bool SiteInstanceImpl::IsRelatedSiteInstance(const SiteInstance* instance) {
return browsing_instance_.get() ==
static_cast<const SiteInstanceImpl*>(instance)
->browsing_instance_.get();
}
size_t SiteInstanceImpl::GetRelatedActiveContentsCount() {
return browsing_instance_->GetCoopRelatedGroupActiveContentsCount();
}
namespace {
bool SandboxConfigurationsMatch(const SiteInfo& site_info,
const UrlInfo& url_info) {
return site_info.is_sandboxed() == url_info.is_sandboxed &&
site_info.unique_sandbox_id() == url_info.unique_sandbox_id;
}
} // namespace
bool SiteInstanceImpl::IsSuitableForUrlInfo(const UrlInfo& url_info) {
const GURL& url = url_info.url;
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// If the URL to navigate to can be associated with any site instance,
// we want to keep it in the same process.
if (blink::IsRendererDebugURL(url))
return true;
// Any process can host an about:blank URL, except the one used for error
// pages, which should not commit successful navigations. This check avoids a
// process transfer for browser-initiated navigations to about:blank in a
// dedicated process; without it, IsSuitableHost would consider this process
// unsuitable for about:blank when it compares process locks.
// Renderer-initiated navigations will handle about:blank navigations
// elsewhere and leave them in the source SiteInstance, along with
// about:srcdoc and data:.
if (url.IsAboutBlank() && !site_info_.is_error_page())
return true;
// The is_sandboxed flags and unique_sandbox_ids must match for this to be a
// suitable SiteInstance.
if (!SandboxConfigurationsMatch(GetSiteInfo(), url_info))
return false;
// If the site URL is an extension (e.g., for hosted apps or WebUI) but the
// process is not (or vice versa), make sure we notice and fix it.
// Note: This call must return information that is identical to what
// would be reported in the SiteInstance returned by
// GetRelatedSiteInstance(url).
SiteInfo site_info = DeriveSiteInfo(url_info, /* is_related= */ true);
// If this is a default SiteInstance and the BrowsingInstance gives us a
// non-default SiteInfo even when we explicitly allow the default SiteInstance
// to be considered, then |url| does not belong in the same process as this
// SiteInstance. This can happen when the
// kProcessSharingWithDefaultSiteInstances feature is not enabled and the
// site URL is explicitly set on a SiteInstance for a URL that would normally
// be directed to the default SiteInstance (e.g. a site not requiring a
// dedicated process). This situation typically happens when the top-level
// frame is a site that should be in the default SiteInstance and the
// SiteInstance associated with that frame is initially a SiteInstance with
// no site URL set.
if (IsDefaultSiteInstance() && site_info != site_info_)
return false;
// Note that HasProcess() may return true if site_instance_group_->process_ is
// null, in process-per-site cases where there's an existing process
// available. We want to use such a process in the IsSuitableHost check, so we
// may end up assigning process_ in the GetProcess() call below.
if (!HasProcess()) {
// If there is no process or site, then this is a new SiteInstance that can
// be used for anything.
if (!HasSite())
return true;
// If there is no process but there is a site, then the process must have
// been discarded after we navigated away. If the SiteInfos match, then it
// is safe to use this SiteInstance unless it is a guest. Guests are a
// special case because we need to be consistent with the HasProcess() path
// and the IsSuitableHost() call below always returns false for guests.
if (site_info_ == site_info)
return !IsGuest();
// If the site URLs do not match, but neither this SiteInstance nor the
// destination site_url require dedicated processes, then it is safe to use
// this SiteInstance.
if (!RequiresDedicatedProcess() &&
!site_info.RequiresDedicatedProcess(GetIsolationContext())) {
return true;
}
// Otherwise, there's no process, the SiteInfos don't match, and at least
// one of them requires a dedicated process, so it is not safe to use this
// SiteInstance.
return false;
}
return RenderProcessHostImpl::IsSuitableHost(
GetProcess(), GetIsolationContext(), site_info);
}
bool SiteInstanceImpl::RequiresDedicatedProcess() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!has_site_)
return false;
return site_info_.RequiresDedicatedProcess(GetIsolationContext());
}
bool SiteInstanceImpl::RequiresOriginKeyedProcess() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!has_site_)
return false;
// TODO(wjmaclean): once SiteInstanceGroups are ready we may give logically
// (same-process) isolated origins their own SiteInstances ... in that case we
// should consider updating this function.
return site_info_.requires_origin_keyed_process();
}
bool SiteInstanceImpl::IsSandboxed() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!has_site_) {
return false;
}
return site_info_.is_sandboxed();
}
void SiteInstanceImpl::IncrementRelatedActiveContentsCount() {
browsing_instance_->IncrementActiveContentsCount();
}
void SiteInstanceImpl::DecrementRelatedActiveContentsCount() {
browsing_instance_->DecrementActiveContentsCount();
}
BrowserContext* SiteInstanceImpl::GetBrowserContext() {
return browsing_instance_->GetBrowserContext();
}
// static
scoped_refptr<SiteInstance> SiteInstance::Create(
BrowserContext* browser_context) {
DCHECK(browser_context);
return SiteInstanceImpl::Create(browser_context);
}
// static
scoped_refptr<SiteInstance> SiteInstance::CreateForURL(
BrowserContext* browser_context,
const GURL& url) {
return SiteInstanceImpl::CreateForURL(browser_context, url);
}
// static
scoped_refptr<SiteInstanceImpl> SiteInstanceImpl::CreateForURL(
BrowserContext* browser_context,
const GURL& url) {
DCHECK(browser_context);
return SiteInstanceImpl::CreateForUrlInfo(
browser_context, UrlInfo(UrlInfoInit(url)), /*is_guest=*/false,
/*is_fenced=*/false, /*is_fixed_storage_partition=*/false);
}
// static
scoped_refptr<SiteInstance> SiteInstance::CreateForGuest(
BrowserContext* browser_context,
const StoragePartitionConfig& partition_config) {
DCHECK(browser_context);
return SiteInstanceImpl::CreateForGuest(browser_context, partition_config);
}
// static
scoped_refptr<SiteInstance> SiteInstance::CreateForFixedStoragePartition(
BrowserContext* browser_context,
const GURL& url,
const StoragePartitionConfig& partition_config) {
CHECK(browser_context);
return SiteInstanceImpl::CreateForFixedStoragePartition(browser_context, url,
partition_config);
}
// static
bool SiteInstance::ShouldAssignSiteForURL(const GURL& url) {
return SiteInstanceImpl::ShouldAssignSiteForUrlInfo(
UrlInfo(UrlInfoInit(url)));
}
bool SiteInstanceImpl::IsSameSiteWithURL(const GURL& url) {
return IsSameSiteWithURLInfo(UrlInfo(UrlInfoInit(url)));
}
bool SiteInstanceImpl::IsSameSiteWithURLInfo(const UrlInfo& url_info) {
const GURL& url = url_info.url;
if (IsDefaultSiteInstance()) {
// about:blank URLs should always be considered same site just like they are
// in IsSameSite().
if (url.IsAboutBlank())
return true;
// Consider |url| the same site if it could be handled by the
// default SiteInstance and we don't already have a SiteInstance for
// this URL.
// TODO(acolwell): Remove HasSiteInstance() call once we have a way to
// prevent SiteInstances with no site URL from being used for URLs
// that should be routed to the default SiteInstance.
DCHECK_EQ(site_info_.site_url(), GetDefaultSiteURL());
// We're only interested in knowning if we're same-site.
// WebExposedIsolationInfo should not come into play here so we make them
// match explicitly.
UrlInfo updated_url_info = url_info;
updated_url_info.web_exposed_isolation_info = GetWebExposedIsolationInfo();
auto site_info = SiteInfo::Create(GetIsolationContext(), updated_url_info);
return CanBePlacedInDefaultSiteInstance(GetIsolationContext(), url,
site_info) &&
!browsing_instance_->HasSiteInstance(site_info);
}
return SiteInstanceImpl::IsSameSite(
GetIsolationContext(), UrlInfo(UrlInfoInit(site_info_.site_url())),
url_info, true /* should_compare_effective_urls */);
}
bool SiteInstanceImpl::IsGuest() {
return site_info_.is_guest();
}
bool SiteInstanceImpl::IsFixedStoragePartition() {
bool is_fixed_storage_partition =
browsing_instance_->is_fixed_storage_partition();
if (IsGuest()) {
CHECK(is_fixed_storage_partition);
}
return is_fixed_storage_partition;
}
bool SiteInstanceImpl::IsJitDisabled() {
return site_info_.is_jit_disabled();
}
bool SiteInstanceImpl::AreV8OptimizationsDisabled() {
return site_info_.are_v8_optimizations_disabled();
}
bool SiteInstanceImpl::IsPdf() {
return site_info_.is_pdf();
}
const StoragePartitionConfig& SiteInstanceImpl::GetStoragePartitionConfig() {
if (!has_site_) {
// Note: `site_info_` has not been set yet. This is ok as long as the
// StoragePartition of this SiteInstance does not change when `site_info_`
// is actually set. Enable the verification code in SetSiteInfoInternal()
// to verify that the storage partition info does not change.
verify_storage_partition_info_ = true;
}
return site_info_.storage_partition_config();
}
std::string SiteInstanceImpl::GetPartitionDomain(
StoragePartitionImpl* storage_partition) {
auto storage_partition_config = GetStoragePartitionConfig();
// The DCHECK here is to allow the trybots to detect any attempt to introduce
// new code that violates this assumption.
DCHECK_EQ(storage_partition->GetPartitionDomain(),
storage_partition_config.partition_domain());
if (storage_partition->GetPartitionDomain() !=
storage_partition_config.partition_domain()) {
// Trigger crash logging if we encounter a case that violates our
// assumptions.
SCOPED_CRASH_KEY_STRING256("GetPartitionDomain", "domain",
storage_partition->GetPartitionDomain());
SCOPED_CRASH_KEY_STRING256("GetPartitionDomain", "config_domain_key",
storage_partition_config.partition_domain());
base::debug::DumpWithoutCrashing();
// Return the value from the config to preserve legacy behavior until we
// can land a fix.
return storage_partition_config.partition_domain();
}
return storage_partition->GetPartitionDomain();
}
bool SiteInstanceImpl::IsOriginalUrlSameSite(
const UrlInfo& dest_url_info,
bool should_compare_effective_urls) {
if (IsDefaultSiteInstance())
return IsSameSiteWithURLInfo(dest_url_info);
// Here we use an |origin_isolation_request| of kNone (done implicitly in the
// UrlInfoInit constructor) when converting |original_url_| to UrlInfo, since
// (i) the isolation status of this SiteInstance was determined at the time
// |original_url_| was set, and in this case it is |dest_url_info| that is
// currently navigating, and that's where the current isolation request (if
// any) is stored. Whether or not this SiteInstance has origin isolation is a
// separate question, and not what the UrlInfo for |original_url_| is supposed
// to reflect.
return IsSameSite(GetIsolationContext(), UrlInfo(UrlInfoInit(original_url_)),
dest_url_info, should_compare_effective_urls);
}
bool SiteInstanceImpl::IsNavigationSameSite(
const GURL& last_successful_url,
const url::Origin& last_committed_origin,
bool for_outermost_main_frame,
const UrlInfo& dest_url_info) {
// The is_sandboxed flags and unique_sandbox_ids must match for this to be a
// same-site navigation.
if (!SandboxConfigurationsMatch(GetSiteInfo(), dest_url_info))
return false;
// Similarly, do not consider PDF and non-PDF documents to be same-site; they
// should never share a SiteInstance. See https://crbug.com/359345045.
if (IsPdf() != dest_url_info.is_pdf) {
return false;
}
const GURL& dest_url = dest_url_info.url;
BrowserContext* browser_context = GetBrowserContext();
bool should_compare_effective_urls = ShouldCompareEffectiveURLs(
browser_context, this, for_outermost_main_frame, dest_url);
// If IsSuitableForUrlInfo finds a process type mismatch, return false
// even if |dest_url| is same-site. (The URL may have been installed as an
// app since the last time we visited it.)
//
// This check must be skipped for certain same-site navigations from a hosted
// app to non-hosted app, and vice versa, to keep them in the same process
// due to scripting requirements. Otherwise, this would return false due to
// a process privilege level mismatch.
//
// TODO(alexmos): Skipping this check is dangerous, since other bits in
// SiteInfo may disqualify the navigation from being same-site, even when a
// hosted app URL embeds a non-hosted-app same-site URL. Two of these cases,
// sandboxed frames and PDF, are currently handled explicitly above, and a
// couple more are handled in the callers of this function, but this should be
// refactored to more systematically check everything else in SiteInfo. See
// https://crbug.com/349777779.
bool should_check_for_wrong_process =
!IsNavigationAllowedToStayInSameProcessDueToEffectiveURLs(
browser_context, for_outermost_main_frame, dest_url);
if (should_check_for_wrong_process && !IsSuitableForUrlInfo(dest_url_info))
return false;
// In the common case, we use the last successful URL. Thus, we compare
// against the last successful commit when deciding whether to swap this time.
// We convert |last_successful_url| to UrlInfo with |origin_isolation_request|
// set to kNone (done implicitly in the UrlInfoInit constructor) since it
// isn't currently navigating.
if (IsSameSite(GetIsolationContext(),
UrlInfo(UrlInfoInit(last_successful_url)), dest_url_info,
should_compare_effective_urls)) {
return true;
}
// It is possible that last_successful_url was a nonstandard scheme (for
// example, "about:blank"). If so, examine the last committed origin to
// determine the site.
// Similar to above, convert |last_committed_origin| to UrlInfo with
// |origin_isolation_request| set to kNone: this is done implicitly in the
// UrlInfoInit constructor.
if (!last_committed_origin.opaque() &&
IsSameSite(GetIsolationContext(),
UrlInfo(UrlInfoInit(GURL(last_committed_origin.Serialize()))),
dest_url_info, should_compare_effective_urls)) {
return true;
}
// If the last successful URL was "about:blank" with a unique origin (which
// implies that it was a browser-initiated navigation to "about:blank"), none
// of the cases above apply, but we should still allow a scenario like
// foo.com -> about:blank -> foo.com to be treated as same-site, as some
// tests rely on that behavior. To accomplish this, compare |dest_url|
// against the site URL.
if (last_successful_url.IsAboutBlank() && last_committed_origin.opaque() &&
IsOriginalUrlSameSite(dest_url_info, should_compare_effective_urls)) {
return true;
}
// Not same-site.
return false;
}
bool SiteInstanceImpl::IsNavigationAllowedToStayInSameProcessDueToEffectiveURLs(
BrowserContext* browser_context,
bool for_outermost_main_frame,
const GURL& dest_url) {
if (ShouldCompareEffectiveURLs(browser_context, this,
for_outermost_main_frame, dest_url)) {
return false;
}
bool src_has_effective_url = !IsDefaultSiteInstance() &&
HasEffectiveURL(browser_context, original_url());
if (src_has_effective_url)
return true;
return HasEffectiveURL(browser_context, dest_url);
}
// static
bool SiteInstanceImpl::IsSameSite(const IsolationContext& isolation_context,
const UrlInfo& real_src_url_info,
const UrlInfo& real_dest_url_info,
bool should_compare_effective_urls) {
const GURL& real_src_url = real_src_url_info.url;
const GURL& real_dest_url = real_dest_url_info.url;
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserContext* browser_context =
isolation_context.browser_or_resource_context().ToBrowserContext();
DCHECK(browser_context);
DCHECK_NE(real_src_url, GetDefaultSiteURL());
GURL src_url =
should_compare_effective_urls
? SiteInstanceImpl::GetEffectiveURL(browser_context, real_src_url)
: real_src_url;
GURL dest_url =
should_compare_effective_urls
? SiteInstanceImpl::GetEffectiveURL(browser_context, real_dest_url)
: real_dest_url;
// We infer web site boundaries based on the registered domain name of the
// top-level page and the scheme. We do not pay attention to the port if
// one is present, because pages served from different ports can still
// access each other if they change their document.domain variable.
// Some special URLs will match the site instance of any other URL. This is
// done before checking both of them for validity, since we want these URLs
// to have the same site instance as even an invalid one.
if (blink::IsRendererDebugURL(src_url) || blink::IsRendererDebugURL(dest_url))
return true;
// If either URL is invalid, they aren't part of the same site.
if (!src_url.is_valid() || !dest_url.is_valid())
return false;
// To be same-site they must have the same `is_sandbox` flag.
if (real_src_url_info.is_sandboxed != real_dest_url_info.is_sandboxed)
return false;
// If the destination url is just a blank page, we treat them as part of the
// same site.
if (dest_url.IsAboutBlank()) {
// TODO(crbug.com/40266169): It's actually possible for the
// about:blank page to inherit an origin that doesn't match `src_origin`. In
// that case we shouldn't treat it as same-site. Consider changing this
// behavior if all tests can pass.
return true;
}
// If the source and destination URLs are equal excluding the hash, they have
// the same site. This matters for file URLs, where SameDomainOrHost() would
// otherwise return false below.
if (src_url.EqualsIgnoringRef(dest_url))
return true;
url::Origin src_origin = url::Origin::Create(src_url);
url::Origin dest_origin = url::Origin::Create(dest_url);
// If the schemes differ, they aren't part of the same site.
if (src_origin.scheme() != dest_origin.scheme())
return false;
// Rely on an origin comparison if StrictOriginIsolation is enabled for all
// URLs, or if we're comparing against a sandboxed iframe in a per-origin
// mode. Due to an earlier check, at this point
// `real_src_url_info.is_sandboxed` and `real_dest_url_info.is_sandboxed` are
// known to have the same value.
if (SiteIsolationPolicy::IsStrictOriginIsolationEnabled() ||
(real_src_url_info.is_sandboxed &&
blink::features::kIsolateSandboxedIframesGroupingParam.Get() ==
blink::features::IsolateSandboxedIframesGrouping::kPerOrigin)) {
return src_origin == dest_origin;
}
if (!net::registry_controlled_domains::SameDomainOrHost(
src_origin, dest_origin,
net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES)) {
return false;
}
// If the sites are the same, check isolated origins. If either URL matches
// an isolated origin, compare origins rather than sites. As an optimization
// to avoid unneeded isolated origin lookups, shortcut this check if the two
// origins are the same.
if (src_origin == dest_origin)
return true;
auto* policy = ChildProcessSecurityPolicyImpl::GetInstance();
url::Origin src_isolated_origin;
url::Origin dest_isolated_origin;
bool src_origin_is_isolated = policy->GetMatchingProcessIsolatedOrigin(
isolation_context, src_origin,
real_src_url_info.RequestsOriginKeyedProcess(isolation_context),
&src_isolated_origin);
bool dest_origin_is_isolated = policy->GetMatchingProcessIsolatedOrigin(
isolation_context, dest_origin,
real_dest_url_info.RequestsOriginKeyedProcess(isolation_context),
&dest_isolated_origin);
if (src_origin_is_isolated || dest_origin_is_isolated) {
// Compare most specific matching origins to ensure that a subdomain of an
// isolated origin (e.g., https://subdomain.isolated.foo.com) also matches
// the isolated origin's site URL (e.g., https://isolated.foo.com).
return src_isolated_origin == dest_isolated_origin;
}
return true;
}
bool SiteInstanceImpl::DoesSiteInfoForURLMatch(const UrlInfo& url_info) {
// We want to compare this SiteInstance's SiteInfo to the SiteInfo that would
// be generated by the passed in UrlInfo. For them to match, the
// WebExposedIsolationInfo must be compatible.
if (!WebExposedIsolationInfo::AreCompatible(
url_info.web_exposed_isolation_info, GetWebExposedIsolationInfo())) {
return false;
}
// Similarly, the common_coop_origin in the UrlInfo and in this
// SiteInstance's BrowsingInstance must be compatible.
if (url_info.common_coop_origin != GetCommonCoopOrigin()) {
return false;
}
// Similarly, the CrossOriginIsolationKeys should match.
if (GetSiteInfo().agent_cluster_key() &&
GetSiteInfo().agent_cluster_key()->GetCrossOriginIsolationKey() !=
url_info.cross_origin_isolation_key) {
return false;
}
// If the passed in UrlInfo has a null WebExposedIsolationInfo, meaning that
// it is compatible with any isolation state, we reuse the isolation state of
// this SiteInstance's SiteInfo so the member comparison of SiteInfos will
// match.
UrlInfo updated_url_info = url_info;
updated_url_info.web_exposed_isolation_info =
site_info_.web_exposed_isolation_info();
auto site_info = SiteInfo::Create(GetIsolationContext(), updated_url_info);
if (kCreateForURLAllowsDefaultSiteInstance &&
CanBePlacedInDefaultSiteInstance(GetIsolationContext(), url_info.url,
site_info)) {
site_info = SiteInfo::CreateForDefaultSiteInstance(
GetIsolationContext(), site_info.storage_partition_config(),
GetWebExposedIsolationInfo());
}
return site_info_.IsExactMatch(site_info);
}
void SiteInstanceImpl::RegisterAsDefaultOriginIsolation(
const url::Origin& previously_visited_origin) {
auto* policy = ChildProcessSecurityPolicyImpl::GetInstance();
policy->AddDefaultIsolatedOriginIfNeeded(
GetIsolationContext(), previously_visited_origin,
true /* is_global_walk_or_frame_removal */);
}
// static
bool SiteInstanceImpl::CanBePlacedInDefaultSiteInstance(
const IsolationContext& isolation_context,
const GURL& url,
const SiteInfo& site_info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!base::FeatureList::IsEnabled(
features::kProcessSharingWithDefaultSiteInstances)) {
return false;
}
// Exclude "file://" URLs from the default SiteInstance to prevent the
// default SiteInstance process from accumulating file access grants that
// could be exploited by other non-isolated sites.
if (url.SchemeIs(url::kFileScheme))
return false;
// Don't use the default SiteInstance when
// kProcessSharingWithStrictSiteInstances is enabled because we want each
// site to have its own SiteInstance object and logic elsewhere ensures
// that those SiteInstances share a process.
if (base::FeatureList::IsEnabled(
features::kProcessSharingWithStrictSiteInstances)) {
return false;
}
// Don't use the default SiteInstance when SiteInstance doesn't assign a
// site URL for |url|, since in that case the SiteInstance should remain
// unused, and a subsequent navigation should always be able to reuse it,
// whether or not it's to a site requiring a dedicated process or to a site
// that will use the default SiteInstance.
if (!ShouldAssignSiteForURL(url))
return false;
// Allow the default SiteInstance to be used for sites that don't need to be
// isolated in their own process.
return !site_info.RequiresDedicatedProcess(isolation_context);
}
// static
GURL SiteInstanceImpl::GetEffectiveURL(BrowserContext* browser_context,
const GURL& url) {
DCHECK(browser_context);
return GetContentClient()->browser()->GetEffectiveURL(browser_context, url);
}
// static
bool SiteInstanceImpl::HasEffectiveURL(BrowserContext* browser_context,
const GURL& url) {
return GetEffectiveURL(browser_context, url) != url;
}
void SiteInstanceImpl::LockProcessIfNeeded() {
RenderProcessHost* process = site_instance_group_->process();
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
ProcessLock process_lock = process->GetProcessLock();
StoragePartitionImpl* storage_partition =
static_cast<StoragePartitionImpl*>(process->GetStoragePartition());
if (!has_site_) {
CHECK(!process_lock.is_locked_to_site())
<< "A process that's already locked to " << process_lock.ToString()
<< " cannot be updated to a more permissive lock";
// Update the process lock state to signal that the process has been
// associated with a SiteInstance that is not locked to a site yet. Note
// that even if the process lock is already set to a lock that allows any
// site, we still need to notify ChildProcessSecurityPolicy about the
// current SiteInstance's IsolationContext, so that the corresponding
// BrowsingInstance can be associated with |process_|. See
// https://crbug.com/1135539.
if (process_lock.is_invalid()) {
auto new_process_lock = ProcessLock::CreateAllowAnySite(
storage_partition->GetConfig(), GetWebExposedIsolationInfo());
process->SetProcessLock(GetIsolationContext(), new_process_lock);
} else {
CHECK(process_lock.allows_any_site())
<< "Unexpected process lock " << process_lock.ToString();
policy->IncludeIsolationContext(process->GetID(), GetIsolationContext());
}
return;
}
DCHECK(HasSite());
DCHECK_EQ(storage_partition->GetConfig(),
site_info_.storage_partition_config());
if (site_info_.ShouldLockProcessToSite(GetIsolationContext())) {
ProcessLock lock_to_set = ProcessLock::FromSiteInfo(GetSiteInfo());
if (!process_lock.is_locked_to_site()) {
// TODO(nick): When all sites are isolated, this operation provides
// strong protection. If only some sites are isolated, we need
// additional logic to prevent the non-isolated sites from requesting
// resources for isolated sites. https://crbug.com/509125
TRACE_EVENT2("navigation", "RenderProcessHost::SetProcessLock", "site id",
id_.value(), "lock", lock_to_set.ToString());
process->SetProcessLock(GetIsolationContext(), lock_to_set);
} else if (process_lock != lock_to_set) {
// We should never attempt to reassign a different origin lock to a
// process.
base::debug::SetCrashKeyString(bad_message::GetRequestedSiteInfoKey(),
site_info_.GetDebugString());
policy->LogKilledProcessOriginLock(process->GetID());
CHECK(false) << "Trying to lock a process to " << lock_to_set.ToString()
<< " but the process is already locked to "
<< process_lock.ToString();
} else {
// Process already has the right origin lock assigned. This case will
// happen for commits to |site_info_| after the first one.
}
} else {
if (process_lock.is_locked_to_site()) {
// The site that we're committing doesn't require a dedicated
// process, but it has been put in a process for a site that does.
base::debug::SetCrashKeyString(bad_message::GetRequestedSiteInfoKey(),
site_info_.GetDebugString());
policy->LogKilledProcessOriginLock(process->GetID());
CHECK(false) << "Trying to commit non-isolated site " << site_info_
<< " in process locked to " << process_lock.ToString();
} else if (process_lock.is_invalid()) {
// Update the process lock state to signal that the process has been
// associated with a SiteInstance that is not locked to a site yet.
auto new_process_lock = ProcessLock::CreateAllowAnySite(
storage_partition->GetConfig(), GetWebExposedIsolationInfo());
process->SetProcessLock(GetIsolationContext(), new_process_lock);
} else {
CHECK(process_lock.allows_any_site())
<< "Unexpected process lock " << process_lock.ToString();
}
}
// From now on, this process should be considered "tainted" for future
// process reuse decisions:
// (1) If |site_info_| required a dedicated process, this SiteInstance's
// process can only host URLs for the same site.
// (2) Even if |site_info_| does not require a dedicated process, this
// SiteInstance's process still cannot be reused to host other sites
// requiring dedicated sites in the future.
// We can get here either when we commit a URL into a SiteInstance that does
// not yet have a site, or when we create a process for a SiteInstance with a
// preassigned site.
process->SetIsUsed();
// Track which isolation contexts use the given process. This lets
// ChildProcessSecurityPolicyImpl (e.g. CanAccessDataForOrigin) determine
// whether a given URL should require a lock or not (a dynamically isolated
// origin may require a lock in some isolation contexts but not in others).
policy->IncludeIsolationContext(process->GetID(), GetIsolationContext());
}
const WebExposedIsolationInfo& SiteInstanceImpl::GetWebExposedIsolationInfo()
const {
return browsing_instance_->web_exposed_isolation_info();
}
bool SiteInstanceImpl::IsCrossOriginIsolated() const {
return GetWebExposedIsolationInfo().is_isolated() ||
(site_info_.agent_cluster_key() &&
site_info_.agent_cluster_key()->GetCrossOriginIsolationKey() &&
site_info_.agent_cluster_key()
->GetCrossOriginIsolationKey()
->cross_origin_isolation_mode ==
CrossOriginIsolationMode::kConcrete);
}
const std::optional<url::Origin>& SiteInstanceImpl::GetCommonCoopOrigin()
const {
return browsing_instance_->common_coop_origin();
}
// static
void SiteInstance::StartIsolatingSite(
BrowserContext* context,
const GURL& url,
ChildProcessSecurityPolicy::IsolatedOriginSource source,
bool should_persist) {
if (!SiteIsolationPolicy::AreDynamicIsolatedOriginsEnabled())
return;
// Ignore attempts to isolate origins that are not supported. Do this here
// instead of relying on AddFutureIsolatedOrigins()'s internal validation, to
// avoid the runtime warning generated by the latter.
url::Origin origin(url::Origin::Create(url));
if (!IsolatedOriginUtil::IsValidIsolatedOrigin(origin))
return;
// Convert |url| to a site, to avoid breaking document.domain. Note that
// this doesn't use effective URL resolution or other special cases from
// GetSiteForURL() and simply converts |origin| to a scheme and eTLD+1.
GURL site(SiteInfo::GetSiteForOrigin(origin));
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
url::Origin site_origin(url::Origin::Create(site));
policy->AddFutureIsolatedOrigins({site_origin}, source, context);
// This function currently assumes the new isolated site should persist
// across restarts, so ask the embedder to save it, excluding off-the-record
// profiles.
if (!context->IsOffTheRecord() && should_persist) {
GetContentClient()->browser()->PersistIsolatedOrigin(context, site_origin,
source);
}
}
void SiteInstanceImpl::WriteIntoTrace(
perfetto::TracedProto<perfetto::protos::pbzero::SiteInstance> proto) {
proto->set_site_instance_id(GetId().value());
proto->set_browsing_instance_id(GetBrowsingInstanceId().value());
proto->set_is_default(IsDefaultSiteInstance());
proto->set_has_process(HasProcess());
proto->set_related_active_contents_count(GetRelatedActiveContentsCount());
proto.Set(TraceProto::kSiteInstanceGroup, group());
if (group()) {
proto->set_active_rfh_count(site_instance_group_->active_frame_count());
}
perfetto::TracedDictionary dict = std::move(proto).AddDebugAnnotations();
dict.Add("site_info", site_info_);
}
int SiteInstanceImpl::EstimateOriginAgentClusterOverheadForMetrics() {
return browsing_instance_->EstimateOriginAgentClusterOverhead();
}
scoped_refptr<SiteInstanceImpl>
SiteInstanceImpl::GetCompatibleSandboxedSiteInstance(
const UrlInfo& url_info,
const url::Origin& parent_origin) {
DCHECK(!IsDefaultSiteInstance());
DCHECK(has_site_);
DCHECK(!GetSiteInfo().is_sandboxed());
DCHECK(url_info.url.IsAboutSrcdoc());
UrlInfo sandboxed_url_info = url_info;
// Since the input `url_info` has a srcdoc url, using the url as-is will
// result in a SiteInfo that's not very specific, so we need something more
// meaningful. Ideally we'd use the UrlInfo used to load the parent, but we
// don't have that anymore, so we use the parent's origin which should be
// close enough. We use GetTupleOrPrecursorTupleIfOpaque in case
// `parent_origin` is opaque.
sandboxed_url_info.url =
parent_origin.GetTupleOrPrecursorTupleIfOpaque().GetURL();
// The `url_info` should already have its is_sandboxed flag set if we're here.
DCHECK(sandboxed_url_info.is_sandboxed);
DCHECK(!sandboxed_url_info.origin);
// At this point assume all other fields in the input `url_info` are correct.
auto sandboxed_site_info =
SiteInfo::Create(GetIsolationContext(), sandboxed_url_info);
auto result =
browsing_instance_->GetSiteInstanceForSiteInfo(sandboxed_site_info);
result->original_url_ = original_url_;
return result;
}
RenderProcessHost* SiteInstanceImpl::GetDefaultProcessForBrowsingInstance() {
if (SiteInstanceImpl* default_instance =
browsing_instance_->default_site_instance()) {
DCHECK(base::FeatureList::IsEnabled(
features::kProcessSharingWithDefaultSiteInstances));
return default_instance->HasProcess() ? default_instance->GetProcess()
: nullptr;
}
if (browsing_instance_->site_instance_group_manager().default_process()) {
DCHECK(base::FeatureList::IsEnabled(
features::kProcessSharingWithStrictSiteInstances));
return browsing_instance_->site_instance_group_manager().default_process();
}
return nullptr;
}
bool SiteInstanceImpl::IsCoopRelatedSiteInstance(
const SiteInstanceImpl* instance) const {
return instance->browsing_instance_->coop_related_group_token() ==
browsing_instance_->coop_related_group_token();
}
void SiteInstanceImpl::SetProcessForTesting(RenderProcessHost* process) {
SetProcessInternal(process);
}
void SiteInstanceImpl::IncrementActiveDocumentCount(
const SiteInfo& url_derived_site_info) {
if (url_derived_site_info.site_url().is_empty()) {
// This can happen when this function is called when destructing an active
// RenderFrameHost, e.g. on frame detach. In this case, there's no need to
// increment the count.
return;
}
if (active_document_counts_.contains(url_derived_site_info)) {
active_document_counts_[url_derived_site_info]++;
} else {
active_document_counts_[url_derived_site_info] = 1;
}
}
void SiteInstanceImpl::DecrementActiveDocumentCount(
const SiteInfo& url_derived_site_info) {
if (url_derived_site_info.site_url().is_empty()) {
// This can happen when this function is called for the initial
// RenderFrameHost, whose `url_derived_site_info` was never set. In that
// case, `IncrementActiveDocumentCount()` will never be called and the map
// won't contain the SiteInfo, so just return early here.
return;
}
CHECK(active_document_counts_.contains(url_derived_site_info));
active_document_counts_[url_derived_site_info]--;
if (active_document_counts_[url_derived_site_info] == 0) {
active_document_counts_.erase(url_derived_site_info);
}
}
size_t SiteInstanceImpl::GetActiveDocumentCount(
const SiteInfo& url_derived_site_info) {
if (active_document_counts_.contains(url_derived_site_info)) {
return active_document_counts_[url_derived_site_info];
}
return 0;
}
} // namespace content