summaryrefslogtreecommitdiffstats
path: root/ipc/glue/GeckoChildProcessHost.cpp
blob: 3e444060bcc115a790f05277954e7c519e2baebf (plain)
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
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "GeckoChildProcessHost.h"

#include "base/command_line.h"
#include "base/process.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "base/task.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/process_watcher.h"
#include "mozilla/ProcessType.h"
#ifdef MOZ_WIDGET_COCOA
#  include <bsm/libbsm.h>
#  include <mach/mach_traps.h>
#  include <servers/bootstrap.h>
#  include "SharedMemoryBasic.h"
#  include "base/rand_util.h"
#  include "chrome/common/mach_ipc_mac.h"
#  include "mozilla/StaticPrefs_media.h"
#  include "nsILocalFileMac.h"
#endif

#include "GeckoProfiler.h"
#include "MainThreadUtils.h"
#include "mozilla/Preferences.h"
#include "mozilla/Sprintf.h"
#include "nsXPCOMPrivate.h"
#include "prenv.h"
#include "prerror.h"

#if defined(MOZ_SANDBOX)
#  include "mozilla/SandboxSettings.h"
#  include "nsAppDirectoryServiceDefs.h"
#endif

#include <sys/stat.h>

#include "ProtocolUtils.h"
#include "mozilla/LinkedList.h"
#include "mozilla/Logging.h"
#include "mozilla/Maybe.h"
#include "mozilla/GeckoArgs.h"
#include "mozilla/Omnijar.h"
#include "mozilla/RDDProcessHost.h"
#include "mozilla/Services.h"
#include "mozilla/SharedThreadPool.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/TaskQueue.h"
#include "mozilla/Telemetry.h"
#include "mozilla/UniquePtrExtensions.h"
#include "mozilla/ipc/BrowserProcessSubThread.h"
#include "mozilla/ipc/EnvironmentMap.h"
#include "mozilla/ipc/NodeController.h"
#include "mozilla/net/SocketProcessHost.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsExceptionHandler.h"
#include "nsIFile.h"
#include "nsIObserverService.h"
#include "nsPrintfCString.h"

#ifdef XP_WIN
#  include <stdlib.h>

#  include "nsIWinTaskbar.h"
#  define NS_TASKBAR_CONTRACTID "@mozilla.org/windows-taskbar;1"

#  if defined(MOZ_SANDBOX)
#    include "WinUtils.h"
#    include "mozilla/Preferences.h"
#    include "mozilla/sandboxing/sandboxLogging.h"
#    if defined(_ARM64_)
#      include "mozilla/remoteSandboxBroker.h"
#    endif
#  endif

#  include "mozilla/NativeNt.h"
#  include "mozilla/CacheNtDllThunk.h"
#endif

#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
#  include "mozilla/SandboxLaunch.h"
#endif

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
#  include "GMPProcessParent.h"
#  include "nsMacUtilsImpl.h"
#endif

#include "mozilla/ipc/UtilityProcessHost.h"
#include "mozilla/ipc/UtilityProcessSandboxing.h"

#include "nsClassHashtable.h"
#include "nsHashKeys.h"
#include "nsNativeCharsetUtils.h"
#include "nsTArray.h"
#include "nscore.h"  // for NS_FREE_PERMANENT_DATA
#include "nsIThread.h"

using mozilla::MonitorAutoLock;
using mozilla::Preferences;
using mozilla::StaticMutexAutoLock;

#ifdef MOZ_WIDGET_ANDROID
#  include "AndroidBridge.h"
#  include "mozilla/java/GeckoProcessManagerWrappers.h"
#  include "mozilla/java/GeckoProcessTypeWrappers.h"
#  include "mozilla/java/GeckoResultWrappers.h"
#  include "mozilla/jni/Refs.h"
#  include "mozilla/jni/Utils.h"
#endif

#ifdef MOZ_ENABLE_FORKSERVER
#  include "mozilla/ipc/ForkServiceChild.h"
#endif

static bool ShouldHaveDirectoryService() {
  return GeckoProcessType_Default == XRE_GetProcessType();
}

namespace mozilla {
namespace ipc {

struct LaunchResults {
  base::ProcessHandle mHandle = 0;
#ifdef XP_MACOSX
  task_t mChildTask = MACH_PORT_NULL;
#endif
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
  RefPtr<AbstractSandboxBroker> mSandboxBroker;
#endif
};
typedef mozilla::MozPromise<LaunchResults, LaunchError, true>
    ProcessLaunchPromise;

static Atomic<int32_t> gChildCounter;

static inline nsISerialEventTarget* IOThread() {
  return XRE_GetIOMessageLoop()->SerialEventTarget();
}

class BaseProcessLauncher {
 public:
  BaseProcessLauncher(GeckoChildProcessHost* aHost,
                      std::vector<std::string>&& aExtraOpts)
      : mProcessType(aHost->mProcessType),
        mLaunchOptions(std::move(aHost->mLaunchOptions)),
        mExtraOpts(std::move(aExtraOpts)),
#ifdef XP_WIN
        mGroupId(aHost->mGroupId),
#endif
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
        mAllowedFilesRead(aHost->mAllowedFilesRead),
        mSandboxLevel(aHost->mSandboxLevel),
        mSandbox(aHost->mSandbox),
        mIsFileContent(aHost->mIsFileContent),
        mEnableSandboxLogging(aHost->mEnableSandboxLogging),
#endif
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
        mDisableOSActivityMode(aHost->mDisableOSActivityMode),
#endif
        mTmpDirName(aHost->mTmpDirName),
        mChildId(++gChildCounter) {
    SprintfLiteral(mPidString, "%" PRIPID, base::GetCurrentProcId());
    aHost->mInitialChannelId.ToProvidedString(mInitialChannelIdString);

    // Compute the serial event target we'll use for launching.
    nsCOMPtr<nsIEventTarget> threadOrPool = GetIPCLauncher();
    mLaunchThread =
        TaskQueue::Create(threadOrPool.forget(), "BaseProcessLauncher");

    if (ShouldHaveDirectoryService()) {
      // "Current process directory" means the app dir, not the current
      // working dir or similar.
      mozilla::Unused
          << nsDirectoryService::gService->GetCurrentProcessDirectory(
                 getter_AddRefs(mAppDir));
    }
  }

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(BaseProcessLauncher);

#ifdef ALLOW_GECKO_CHILD_PROCESS_ARCH
  void SetLaunchArchitecture(uint32_t aLaunchArch) {
    mLaunchArch = aLaunchArch;
  }
#endif

  RefPtr<ProcessLaunchPromise> Launch(GeckoChildProcessHost*);

 protected:
  virtual ~BaseProcessLauncher() = default;

  RefPtr<ProcessLaunchPromise> PerformAsyncLaunch();
  RefPtr<ProcessLaunchPromise> FinishLaunch();

  // Overrideable hooks. If superclass behavior is invoked, it's always at the
  // top of the override.
  virtual Result<Ok, LaunchError> DoSetup();
  virtual RefPtr<ProcessHandlePromise> DoLaunch() = 0;
  virtual Result<Ok, LaunchError> DoFinishLaunch();

  void MapChildLogging();

  static BinPathType GetPathToBinary(FilePath&, GeckoProcessType);

  void GetChildLogName(const char* origLogName, nsACString& buffer);

  const char* ChildProcessType() {
    return XRE_GeckoProcessTypeToString(mProcessType);
  }

  nsCOMPtr<nsISerialEventTarget> mLaunchThread;
  GeckoProcessType mProcessType;
  UniquePtr<base::LaunchOptions> mLaunchOptions;
#ifdef ALLOW_GECKO_CHILD_PROCESS_ARCH
  uint32_t mLaunchArch = base::PROCESS_ARCH_INVALID;
#endif
  std::vector<std::string> mExtraOpts;
#ifdef XP_WIN
  nsString mGroupId;
#endif
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
  std::vector<std::wstring> mAllowedFilesRead;
  int32_t mSandboxLevel;
  SandboxingKind mSandbox;
  bool mIsFileContent;
  bool mEnableSandboxLogging;
#endif
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
  // Controls whether or not the process will be launched with
  // environment variable OS_ACTIVITY_MODE set to "disabled".
  bool mDisableOSActivityMode;
#endif
  nsCString mTmpDirName;
  LaunchResults mResults = LaunchResults();
  int32_t mChildId;
  TimeStamp mStartTimeStamp = TimeStamp::Now();
  char mPidString[32];
  char mInitialChannelIdString[NSID_LENGTH];

  // Set during launch.
  IPC::Channel::ChannelHandle mClientChannelHandle;
  nsCOMPtr<nsIFile> mAppDir;
};

#ifdef XP_WIN
class WindowsProcessLauncher : public BaseProcessLauncher {
 public:
  WindowsProcessLauncher(GeckoChildProcessHost* aHost,
                         std::vector<std::string>&& aExtraOpts)
      : BaseProcessLauncher(aHost, std::move(aExtraOpts)),
        mCachedNtdllThunk(GetCachedNtDllThunk()) {}

 protected:
  virtual Result<Ok, LaunchError> DoSetup() override;
  virtual RefPtr<ProcessHandlePromise> DoLaunch() override;
  virtual Result<Ok, LaunchError> DoFinishLaunch() override;

  mozilla::Maybe<CommandLine> mCmdLine;
#  ifdef MOZ_SANDBOX
  bool mUseSandbox = false;
#  endif

  const Buffer<IMAGE_THUNK_DATA>* mCachedNtdllThunk;
};
typedef WindowsProcessLauncher ProcessLauncher;
#endif  // XP_WIN

#ifdef XP_UNIX
class PosixProcessLauncher : public BaseProcessLauncher {
 public:
  PosixProcessLauncher(GeckoChildProcessHost* aHost,
                       std::vector<std::string>&& aExtraOpts)
      : BaseProcessLauncher(aHost, std::move(aExtraOpts)),
        mProfileDir(aHost->mProfileDir),
        mChannelDstFd(IPC::Channel::GetClientChannelHandle()) {}

 protected:
  virtual Result<Ok, LaunchError> DoSetup() override;
  virtual RefPtr<ProcessHandlePromise> DoLaunch() override;

  nsCOMPtr<nsIFile> mProfileDir;

  std::vector<std::string> mChildArgv;
  int mChannelDstFd;
};

#  if defined(XP_MACOSX)
class MacProcessLauncher : public PosixProcessLauncher {
 public:
  MacProcessLauncher(GeckoChildProcessHost* aHost,
                     std::vector<std::string>&& aExtraOpts)
      : PosixProcessLauncher(aHost, std::move(aExtraOpts)),
        // Put a random number into the channel name, so that
        // a compromised renderer can't pretend being the child
        // that's forked off.
        mMachConnectionName(
            StringPrintf("org.mozilla.machname.%d",
                         base::RandInt(0, std::numeric_limits<int>::max()))) {
    MOZ_ASSERT(mMachConnectionName.size() < BOOTSTRAP_MAX_NAME_LEN);
  }

 protected:
  virtual Result<Ok, LaunchError> DoFinishLaunch() override;

  std::string mMachConnectionName;
  // We add a mach port to the command line so the child can communicate its
  // 'task_t' back to the parent.
  mozilla::UniqueMachReceiveRight mParentRecvPort;

  friend class PosixProcessLauncher;
};
typedef MacProcessLauncher ProcessLauncher;
#  elif defined(MOZ_WIDGET_ANDROID)
class AndroidProcessLauncher : public PosixProcessLauncher {
 public:
  AndroidProcessLauncher(GeckoChildProcessHost* aHost,
                         std::vector<std::string>&& aExtraOpts)
      : PosixProcessLauncher(aHost, std::move(aExtraOpts)) {}

 protected:
  virtual RefPtr<ProcessHandlePromise> DoLaunch() override;
  RefPtr<ProcessHandlePromise> LaunchAndroidService(
      const GeckoProcessType aType, const std::vector<std::string>& argv,
      const base::file_handle_mapping_vector& fds_to_remap);
};
typedef AndroidProcessLauncher ProcessLauncher;
// NB: Technically Android is linux (i.e. XP_LINUX is defined), but we want
// orthogonal IPC machinery there. Conversely, there are tier-3 non-Linux
// platforms (BSD and Solaris) where we want the "linux" IPC machinery. So
// we use MOZ_WIDGET_* to choose the platform backend.
#  elif defined(MOZ_WIDGET_GTK)
class LinuxProcessLauncher : public PosixProcessLauncher {
 public:
  LinuxProcessLauncher(GeckoChildProcessHost* aHost,
                       std::vector<std::string>&& aExtraOpts)
      : PosixProcessLauncher(aHost, std::move(aExtraOpts)) {}

 protected:
  virtual Result<Ok, LaunchError> DoSetup() override;
};
typedef LinuxProcessLauncher ProcessLauncher;
#  elif defined(MOZ_WIDGET_UIKIT)
class IosProcessLauncher : public PosixProcessLauncher {
 public:
  IosProcessLauncher(GeckoChildProcessHost* aHost,
                     std::vector<std::string>&& aExtraOpts)
      : PosixProcessLauncher(aHost, std::move(aExtraOpts)) {}

 protected:
  virtual RefPtr<ProcessHandlePromise> DoLaunch() override {
    MOZ_CRASH("IosProcessLauncher::DoLaunch not implemented");
  }
};
typedef IosProcessLauncher ProcessLauncher;
#  else
#    error "Unknown platform"
#  endif
#endif  // XP_UNIX

using base::ProcessHandle;
using mozilla::ipc::BaseProcessLauncher;
using mozilla::ipc::ProcessLauncher;

mozilla::StaticAutoPtr<mozilla::LinkedList<GeckoChildProcessHost>>
    GeckoChildProcessHost::sGeckoChildProcessHosts;

mozilla::StaticMutex GeckoChildProcessHost::sMutex;

GeckoChildProcessHost::GeckoChildProcessHost(GeckoProcessType aProcessType,
                                             bool aIsFileContent)
    : mProcessType(aProcessType),
      mIsFileContent(aIsFileContent),
      mMonitor("mozilla.ipc.GeckoChildProcessHost.mMonitor"),
      mLaunchOptions(MakeUnique<base::LaunchOptions>()),
      mInitialChannelId(nsID::GenerateUUID()),
      mProcessState(CREATING_CHANNEL),
#ifdef XP_WIN
      mGroupId(u"-"),
#endif
#if defined(MOZ_SANDBOX) && defined(XP_WIN)
      mEnableSandboxLogging(false),
      mSandboxLevel(0),
#endif
      mHandleLock("mozilla.ipc.GeckoChildProcessHost.mHandleLock"),
      mChildProcessHandle(0),
#if defined(MOZ_WIDGET_COCOA)
      mChildTask(MACH_PORT_NULL),
#endif
#if defined(MOZ_SANDBOX) && defined(XP_MACOSX)
      mDisableOSActivityMode(false),
#endif
      mDestroying(false) {
  MOZ_COUNT_CTOR(GeckoChildProcessHost);
  StaticMutexAutoLock lock(sMutex);
  if (!sGeckoChildProcessHosts) {
    sGeckoChildProcessHosts = new mozilla::LinkedList<GeckoChildProcessHost>();
  }
  sGeckoChildProcessHosts->insertBack(this);
#if defined(MOZ_SANDBOX) && defined(XP_LINUX)
  if (aProcessType == GeckoProcessType_Content) {
#  if defined(MOZ_CONTENT_TEMP_DIR)
    // The content process needs the content temp dir:
    nsCOMPtr<nsIFile> contentTempDir;
    nsresult rv = NS_GetSpecialDirectory(NS_APP_CONTENT_PROCESS_TEMP_DIR,
                                         getter_AddRefs(contentTempDir));
    if (NS_SUCCEEDED(rv)) {
      contentTempDir->GetNativePath(mTmpDirName);
    }
#  endif
  } else if (aProcessType == GeckoProcessType_RDD) {
    // The RDD process makes limited use of EGL.  If Mesa's shader
    // cache is enabled and the directory isn't explicitly set, then
    // it will try to getpwuid() the user which can cause problems
    // with sandboxing.  Because we shouldn't need shader caching in
    // this process, we just disable the cache to prevent that.
    mLaunchOptions->env_map["MESA_GLSL_CACHE_DISABLE"] = "true";
    mLaunchOptions->env_map["MESA_SHADER_CACHE_DISABLE"] = "true";
    // In case the nvidia driver is also loaded:
    mLaunchOptions->env_map["__GL_SHADER_DISK_CACHE"] = "0";
  }
#endif
#if defined(MOZ_ENABLE_FORKSERVER)
  if (aProcessType != GeckoProcessType_ForkServer && ForkServiceChild::Get()) {
    mLaunchOptions->use_forkserver = true;
  }
#endif
}

GeckoChildProcessHost::~GeckoChildProcessHost()

{
  AssertIOThread();
  MOZ_RELEASE_ASSERT(mDestroying);

  MOZ_COUNT_DTOR(GeckoChildProcessHost);

  {
    mozilla::AutoWriteLock hLock(mHandleLock);
#if defined(MOZ_WIDGET_COCOA)
    if (mChildTask != MACH_PORT_NULL) {
      mach_port_deallocate(mach_task_self(), mChildTask);
    }
#endif

    if (mChildProcessHandle != 0) {
      ProcessWatcher::EnsureProcessTerminated(
          mChildProcessHandle
#ifdef NS_FREE_PERMANENT_DATA
          // If we're doing leak logging, shutdown can be slow.
          ,
          false  // don't "force"
#endif
      );
      mChildProcessHandle = 0;
    }
  }

#if defined(MOZ_SANDBOX) && defined(XP_WIN)
  if (mSandboxBroker) {
    mSandboxBroker->Shutdown();
    mSandboxBroker = nullptr;
  }
#endif
}

base::ProcessHandle GeckoChildProcessHost::GetChildProcessHandle() {
  mozilla::AutoReadLock handleLock(mHandleLock);
  return mChildProcessHandle;
}

base::ProcessId GeckoChildProcessHost::GetChildProcessId() {
  mozilla::AutoReadLock handleLock(mHandleLock);
  if (!mChildProcessHandle) {
    return 0;
  }
  return base::GetProcId(mChildProcessHandle);
}

#ifdef XP_MACOSX
task_t GeckoChildProcessHost::GetChildTask() {
  mozilla::AutoReadLock handleLock(mHandleLock);
  return mChildTask;
}
#endif

void GeckoChildProcessHost::RemoveFromProcessList() {
  StaticMutexAutoLock lock(sMutex);
  if (!sGeckoChildProcessHosts) {
    return;
  }
  LinkedListElement<GeckoChildProcessHost>::removeFrom(
      *sGeckoChildProcessHosts);
}

void GeckoChildProcessHost::Destroy() {
  MOZ_RELEASE_ASSERT(!mDestroying);
  // We can remove from the list before it's really destroyed
  RemoveFromProcessList();
  RefPtr<ProcessHandlePromise> whenReady = mHandlePromise;

  if (!whenReady) {
    // AsyncLaunch not called yet, so dispatch immediately.
    whenReady = ProcessHandlePromise::CreateAndReject(
        LaunchError("DestroyEarly"), __func__);
  }

  using Value = ProcessHandlePromise::ResolveOrRejectValue;
  mDestroying = true;
  whenReady->Then(XRE_GetIOMessageLoop()->SerialEventTarget(), __func__,
                  [this](const Value&) { delete this; });
}

// static
mozilla::BinPathType BaseProcessLauncher::GetPathToBinary(
    FilePath& exePath, GeckoProcessType processType) {
  BinPathType pathType = XRE_GetChildProcBinPathType(processType);

  if (pathType == BinPathType::Self) {
#if defined(XP_WIN)
    wchar_t exePathBuf[MAXPATHLEN];
    if (!::GetModuleFileNameW(nullptr, exePathBuf, MAXPATHLEN)) {
      MOZ_CRASH("GetModuleFileNameW failed (FIXME)");
    }
    exePath = FilePath::FromWStringHack(exePathBuf);
#else
    exePath = FilePath(CommandLine::ForCurrentProcess()->argv()[0]);
#endif
    return pathType;
  }

#ifdef MOZ_WIDGET_COCOA
  // The GMP child process runs via the Media Plugin Helper executable
  // which is a clone of plugin-container allowing for GMP-specific
  // codesigning entitlements.
  nsCString bundleName;
  std::string executableLeafName;
  if (processType == GeckoProcessType_GMPlugin &&
      mozilla::StaticPrefs::media_plugin_helper_process_enabled()) {
    bundleName = MOZ_EME_PROCESS_BUNDLENAME;
    executableLeafName = MOZ_EME_PROCESS_NAME_BRANDED;
  } else {
    bundleName = MOZ_CHILD_PROCESS_BUNDLENAME;
    executableLeafName = MOZ_CHILD_PROCESS_NAME;
  }
#endif

  if (ShouldHaveDirectoryService()) {
    MOZ_ASSERT(gGREBinPath);
#ifdef XP_WIN
    exePath = FilePath(char16ptr_t(gGREBinPath));
#elif MOZ_WIDGET_COCOA
    nsCOMPtr<nsIFile> childProcPath;
    NS_NewLocalFile(nsDependentString(gGREBinPath), false,
                    getter_AddRefs(childProcPath));

    // We need to use an App Bundle on OS X so that we can hide
    // the dock icon. See Bug 557225.
    childProcPath->AppendNative(bundleName);
    childProcPath->AppendNative("Contents"_ns);
    childProcPath->AppendNative("MacOS"_ns);
    nsCString tempCPath;
    childProcPath->GetNativePath(tempCPath);
    exePath = FilePath(tempCPath.get());
#else
    nsCString path;
    NS_CopyUnicodeToNative(nsDependentString(gGREBinPath), path);
    exePath = FilePath(path.get());
#endif
  }

  if (exePath.empty()) {
#ifdef XP_WIN
    exePath =
        FilePath::FromWStringHack(CommandLine::ForCurrentProcess()->program());
#else
    exePath = FilePath(CommandLine::ForCurrentProcess()->argv()[0]);
#endif
    exePath = exePath.DirName();
  }

#ifdef MOZ_WIDGET_COCOA
  exePath = exePath.Append(executableLeafName);
#else
  exePath = exePath.AppendASCII(MOZ_CHILD_PROCESS_NAME);
#endif

  return pathType;
}

#ifdef MOZ_WIDGET_COCOA
class AutoCFTypeObject {
 public:
  explicit AutoCFTypeObject(CFTypeRef object) { mObject = object; }
  ~AutoCFTypeObject() { ::CFRelease(mObject); }

 private:
  CFTypeRef mObject;
};
#endif

// We start the unique IDs at 1 so that 0 can be used to mean that
// a component has no unique ID assigned to it.
uint32_t GeckoChildProcessHost::sNextUniqueID = 1;

/* static */
uint32_t GeckoChildProcessHost::GetUniqueID() { return sNextUniqueID++; }

/* static */
void GeckoChildProcessHost::SetEnv(const char* aKey, const char* aValue) {
  MOZ_ASSERT(mLaunchOptions);
  mLaunchOptions->env_map[ENVIRONMENT_STRING(aKey)] =
      ENVIRONMENT_STRING(aValue);
}

void GeckoChildProcessHost::PrepareLaunch() {
  if (CrashReporter::GetEnabled()) {
    CrashReporter::OOPInit();
  }

#if defined(XP_LINUX) && defined(MOZ_SANDBOX)
  SandboxLaunch::Configure(mProcessType, mSandbox, mLaunchOptions.get());
#endif

#ifdef XP_WIN

#  if defined(MOZ_SANDBOX)
  // We need to get the pref here as the process is launched off main thread.
  if (mProcessType == GeckoProcessType_Content) {
    // Win32k Lockdown state must be initialized on the main thread.
    // This is our last chance to do it before it is read on the IPC Launch
    // thread
    GetWin32kLockdownState();
    mSandboxLevel = GetEffectiveContentSandboxLevel();
    mEnableSandboxLogging =
        Preferences::GetBool("security.sandbox.logging.enabled");

    // We currently have to whitelist certain paths for tests to work in some
    // development configurations.
    nsAutoString readPaths;
    nsresult rv = Preferences::GetString(
        "security.sandbox.content.read_path_whitelist", readPaths);
    if (NS_SUCCEEDED(rv)) {
      for (const nsAString& readPath : readPaths.Split(',')) {
        nsString trimmedPath(readPath);
        trimmedPath.Trim(" ", true, true);
        std::wstring resolvedPath(trimmedPath.Data());
        // Check if path ends with '\' as this indicates we want to give read
        // access to a directory and so it needs a wildcard.
        if (resolvedPath.back() == L'\\') {
          resolvedPath.append(L"*");
        }
        mAllowedFilesRead.push_back(resolvedPath);
      }
    }
  }
#  endif

#  if defined(MOZ_SANDBOX)
  // For other process types we can't rely on them being launched on main
  // thread and they may not have access to prefs in the child process, so allow
  // them to turn on logging via an environment variable.
  mEnableSandboxLogging =
      mEnableSandboxLogging || !!PR_GetEnv("MOZ_SANDBOX_LOGGING");

#  endif
#elif defined(XP_MACOSX)
#  if defined(MOZ_SANDBOX)
  if (ShouldHaveDirectoryService() &&
      mProcessType != GeckoProcessType_GMPlugin) {
    mozilla::Unused << NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
                                              getter_AddRefs(mProfileDir));
  }
#  endif
#endif
}

#ifdef XP_WIN
void GeckoChildProcessHost::InitWindowsGroupID() {
  // On Win7+, pass the application user model to the child, so it can
  // register with it. This insures windows created by the container
  // properly group with the parent app on the Win7 taskbar.
  nsCOMPtr<nsIWinTaskbar> taskbarInfo = do_GetService(NS_TASKBAR_CONTRACTID);
  if (taskbarInfo) {
    bool isSupported = false;
    taskbarInfo->GetAvailable(&isSupported);
    nsAutoString appId;
    if (isSupported && NS_SUCCEEDED(taskbarInfo->GetDefaultGroupId(appId))) {
      MOZ_ASSERT(mGroupId.EqualsLiteral("-"));
      mGroupId.Assign(appId);
    }
  }
}
#endif

bool GeckoChildProcessHost::SyncLaunch(std::vector<std::string> aExtraOpts,
                                       int aTimeoutMs) {
  if (!AsyncLaunch(std::move(aExtraOpts))) {
    return false;
  }
  return WaitUntilConnected(aTimeoutMs);
}

// Note: for most process types, we currently call AsyncLaunch, and therefore
// the *ProcessLauncher constructor, on the main thread, while the
// ProcessLauncher methods to actually execute the launch are called on the IO
// or IPC launcher thread. GMP processes are an exception - the GMP code
// invokes GeckoChildProcessHost from non-main-threads, and therefore we cannot
// rely on having access to mainthread-only services (like the directory
// service) from this code if we're launching that type of process.
bool GeckoChildProcessHost::AsyncLaunch(std::vector<std::string> aExtraOpts) {
  PrepareLaunch();

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
  if (IsMacSandboxLaunchEnabled() && !AppendMacSandboxParams(aExtraOpts)) {
    return false;
  }
#endif

  RefPtr<BaseProcessLauncher> launcher =
      new ProcessLauncher(this, std::move(aExtraOpts));
#ifdef ALLOW_GECKO_CHILD_PROCESS_ARCH
  launcher->SetLaunchArchitecture(mLaunchArch);
#endif

  // Note: Destroy() waits on mHandlePromise to delete |this|. As such, we want
  // to be sure that all of our post-launch processing on |this| happens before
  // mHandlePromise notifies.
  MOZ_ASSERT(mHandlePromise == nullptr);
  mHandlePromise =
      mozilla::InvokeAsync<GeckoChildProcessHost*>(
          IOThread(), launcher.get(), __func__, &BaseProcessLauncher::Launch,
          this)
          ->Then(
              IOThread(), __func__,
              [this](LaunchResults&& aResults) {
                {
                  {
                    mozilla::AutoWriteLock handleLock(mHandleLock);
                    if (!OpenPrivilegedHandle(base::GetProcId(aResults.mHandle))
#ifdef XP_WIN
                        // If we failed in opening the process handle, try
                        // harder by duplicating one.
                        && !::DuplicateHandle(
                               ::GetCurrentProcess(), aResults.mHandle,
                               ::GetCurrentProcess(), &mChildProcessHandle,
                               PROCESS_DUP_HANDLE | PROCESS_TERMINATE |
                                   PROCESS_QUERY_INFORMATION | PROCESS_VM_READ |
                                   SYNCHRONIZE,
                               FALSE, 0)
#endif  // XP_WIN
                    ) {
                      MOZ_CRASH("cannot open handle to child process");
                    }
                    // The original handle is no longer needed; it must
                    // be closed to prevent a resource leak.
                    base::CloseProcessHandle(aResults.mHandle);
                    // FIXME (bug 1720523): define a cross-platform
                    // "safe" invalid value to use in places like this.
                    aResults.mHandle = 0;

#ifdef XP_MACOSX
                    this->mChildTask = aResults.mChildTask;
#endif

                    if (mNodeChannel) {
                      mNodeChannel->SetOtherPid(
                          base::GetProcId(this->mChildProcessHandle));
#ifdef XP_MACOSX
                      mNodeChannel->SetMachTaskPort(this->mChildTask);
#endif
                    }
                  }
#if defined(XP_WIN) && defined(MOZ_SANDBOX)
                  this->mSandboxBroker = std::move(aResults.mSandboxBroker);
#endif

                  MonitorAutoLock lock(mMonitor);
                  // The OnChannel{Connected,Error} may have already advanced
                  // the state.
                  if (mProcessState < PROCESS_CREATED) {
                    mProcessState = PROCESS_CREATED;
                  }
                  lock.Notify();
                }
                return ProcessHandlePromise::CreateAndResolve(
                    GetChildProcessHandle(), __func__);
              },
              [this](const LaunchError aError) {
                // WaitUntilConnected might be waiting for us to signal.
                // If something failed let's set the error state and notify.
                CHROMIUM_LOG(ERROR)
                    << "Failed to launch "
                    << XRE_GeckoProcessTypeToString(mProcessType)
                    << " subprocess";
                Telemetry::Accumulate(
                    Telemetry::SUBPROCESS_LAUNCH_FAILURE,
                    nsDependentCString(
                        XRE_GeckoProcessTypeToString(mProcessType)));
                nsCString telemetryKey = nsPrintfCString(
#if defined(XP_WIN)
                    "%s,0x%lx,%s",
#else
                    "%s,%d,%s",
#endif
                    aError.FunctionName(), aError.ErrorCode(),
                    XRE_GeckoProcessTypeToString(mProcessType));
                // Max telemetry key is 72 chars
                // https://searchfox.org/mozilla-central/rev/c244b16815d1fc827d141472b9faac5610f250e7/toolkit/components/telemetry/core/TelemetryScalar.cpp#105
                if (telemetryKey.Length() > 72) {
                  NS_WARNING(nsPrintfCString("Truncating telemetry key: %s",
                                             telemetryKey.get())
                                 .get());
                  telemetryKey.Truncate(72);
                }
                Telemetry::ScalarAdd(
                    Telemetry::ScalarID::
                        DOM_PARENTPROCESS_PROCESS_LAUNCH_ERRORS,
                    NS_ConvertUTF8toUTF16(telemetryKey), 1);
                {
                  MonitorAutoLock lock(mMonitor);
                  mProcessState = PROCESS_ERROR;
                  lock.Notify();
                }
                return ProcessHandlePromise::CreateAndReject(aError, __func__);
              });
  return true;
}

bool GeckoChildProcessHost::WaitUntilConnected(int32_t aTimeoutMs) {
  AUTO_PROFILER_LABEL("GeckoChildProcessHost::WaitUntilConnected", OTHER);

  // NB: this uses a different mechanism than the chromium parent
  // class.
  TimeDuration timeout = (aTimeoutMs > 0)
                             ? TimeDuration::FromMilliseconds(aTimeoutMs)
                             : TimeDuration::Forever();

  MonitorAutoLock lock(mMonitor);
  TimeStamp waitStart = TimeStamp::Now();
  TimeStamp current;

  // We'll receive several notifications, we need to exit when we
  // have either successfully launched or have timed out.
  while (mProcessState != PROCESS_CONNECTED) {
    // If there was an error then return it, don't wait out the timeout.
    if (mProcessState == PROCESS_ERROR) {
      break;
    }

    CVStatus status = lock.Wait(timeout);
    if (status == CVStatus::Timeout) {
      break;
    }

    if (timeout != TimeDuration::Forever()) {
      current = TimeStamp::Now();
      timeout -= current - waitStart;
      waitStart = current;
    }
  }

  return mProcessState == PROCESS_CONNECTED;
}

bool GeckoChildProcessHost::WaitForProcessHandle() {
  MonitorAutoLock lock(mMonitor);
  while (mProcessState < PROCESS_CREATED) {
    lock.Wait();
  }
  MOZ_ASSERT(mProcessState == PROCESS_ERROR || GetChildProcessHandle());

  return mProcessState < PROCESS_ERROR;
}

bool GeckoChildProcessHost::LaunchAndWaitForProcessHandle(
    StringVector aExtraOpts) {
  if (!AsyncLaunch(std::move(aExtraOpts))) {
    return false;
  }
  return WaitForProcessHandle();
}

void GeckoChildProcessHost::InitializeChannel(
    IPC::Channel::ChannelHandle&& aServerHandle) {
  // Create the IPC channel which will be used for communication with this
  // process.
  mozilla::UniquePtr<IPC::Channel> channel = MakeUnique<IPC::Channel>(
      std::move(aServerHandle), IPC::Channel::MODE_SERVER,
      base::kInvalidProcessId);
#if defined(XP_WIN)
  channel->StartAcceptingHandles(IPC::Channel::MODE_SERVER);
#elif defined(XP_DARWIN)
  channel->StartAcceptingMachPorts(IPC::Channel::MODE_SERVER);
#endif

  mNodeController = NodeController::GetSingleton();
  std::tie(mInitialPort, mNodeChannel) =
      mNodeController->InviteChildProcess(std::move(channel), this);

  MonitorAutoLock lock(mMonitor);
  mProcessState = CHANNEL_INITIALIZED;
  lock.Notify();
}

void GeckoChildProcessHost::SetAlreadyDead() {
  mozilla::AutoWriteLock handleLock(mHandleLock);
  if (mChildProcessHandle &&
      mChildProcessHandle != base::kInvalidProcessHandle) {
    base::CloseProcessHandle(mChildProcessHandle);
  }

  mChildProcessHandle = 0;
}

void BaseProcessLauncher::GetChildLogName(const char* origLogName,
                                          nsACString& buffer) {
#ifdef XP_WIN
  // On Windows we must expand relative paths because sandboxing rules
  // bound only to full paths.  fopen fowards to NtCreateFile which checks
  // the path against the sanboxing rules as passed to fopen (left relative).
  char absPath[MAX_PATH + 2];
  if (_fullpath(absPath, origLogName, sizeof(absPath))) {
    buffer.Append(absPath);
  } else
#endif
  {
    buffer.Append(origLogName);
  }

  // Remove .moz_log extension to avoid its duplication, it will be added
  // automatically by the logging backend
  static constexpr auto kMozLogExt = nsLiteralCString{MOZ_LOG_FILE_EXTENSION};
  if (StringEndsWith(buffer, kMozLogExt)) {
    buffer.Truncate(buffer.Length() - kMozLogExt.Length());
  }

  // Append child-specific postfix to name
  buffer.AppendLiteral(".child-");
  buffer.AppendInt(mChildId);
}

// Windows needs a single dedicated thread for process launching,
// because of thread-safety restrictions/assertions in the sandbox
// code.
//
// Android also needs a single dedicated thread to simplify thread
// safety in java.
//
// Fork server needs a dedicated thread for accessing
// |ForkServiceChild|.
#if defined(XP_WIN) || defined(MOZ_WIDGET_ANDROID) || \
    defined(MOZ_ENABLE_FORKSERVER)

static mozilla::StaticMutex gIPCLaunchThreadMutex;
static mozilla::StaticRefPtr<nsIThread> gIPCLaunchThread
    MOZ_GUARDED_BY(gIPCLaunchThreadMutex);

class IPCLaunchThreadObserver final : public nsIObserver {
 public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIOBSERVER
 protected:
  virtual ~IPCLaunchThreadObserver() = default;
};

NS_IMPL_ISUPPORTS(IPCLaunchThreadObserver, nsIObserver, nsISupports)

NS_IMETHODIMP
IPCLaunchThreadObserver::Observe(nsISupports* aSubject, const char* aTopic,
                                 const char16_t* aData) {
  MOZ_RELEASE_ASSERT(strcmp(aTopic, "xpcom-shutdown-threads") == 0);
  StaticMutexAutoLock lock(gIPCLaunchThreadMutex);

  nsresult rv = NS_OK;
  if (gIPCLaunchThread) {
    rv = gIPCLaunchThread->Shutdown();
    gIPCLaunchThread = nullptr;
  }
  mozilla::Unused << NS_WARN_IF(NS_FAILED(rv));
  return rv;
}

nsCOMPtr<nsIEventTarget> GetIPCLauncher() {
  StaticMutexAutoLock lock(gIPCLaunchThreadMutex);
  if (!gIPCLaunchThread) {
    nsCOMPtr<nsIThread> thread;
    nsresult rv = NS_NewNamedThread("IPC Launch"_ns, getter_AddRefs(thread));
    if (!NS_WARN_IF(NS_FAILED(rv))) {
      NS_DispatchToMainThread(
          NS_NewRunnableFunction("GeckoChildProcessHost::GetIPCLauncher", [] {
            nsCOMPtr<nsIObserverService> obsService =
                mozilla::services::GetObserverService();
            nsCOMPtr<nsIObserver> obs = new IPCLaunchThreadObserver();
            obsService->AddObserver(obs, "xpcom-shutdown-threads", false);
          }));
      gIPCLaunchThread = thread.forget();
    }
  }

  nsCOMPtr<nsIEventTarget> thread = gIPCLaunchThread.get();
  MOZ_DIAGNOSTIC_ASSERT(thread);
  return thread;
}

#else  // defined(XP_WIN) || defined(MOZ_WIDGET_ANDROID) ||
       // defined(MOZ_ENABLE_FORKSERVER)

// Other platforms use an on-demand thread pool.

nsCOMPtr<nsIEventTarget> GetIPCLauncher() {
  nsCOMPtr<nsIEventTarget> pool =
      mozilla::SharedThreadPool::Get("IPC Launch"_ns);
  MOZ_DIAGNOSTIC_ASSERT(pool);
  return pool;
}

#endif  // XP_WIN || MOZ_WIDGET_ANDROID || MOZ_ENABLE_FORKSERVER

void
#if defined(XP_WIN)
AddAppDirToCommandLine(CommandLine& aCmdLine, nsIFile* aAppDir)
#else
AddAppDirToCommandLine(std::vector<std::string>& aCmdLine, nsIFile* aAppDir,
    nsIFile* aProfileDir)
#endif
{
  // Content processes need access to application resources, so pass
  // the full application directory path to the child process.
  if (aAppDir) {
#if defined(XP_WIN)
    nsString path;
    MOZ_ALWAYS_SUCCEEDS(aAppDir->GetPath(path));
    aCmdLine.AppendLooseValue(UTF8ToWide(geckoargs::sAppDir.Name()));
    std::wstring wpath(path.get());
    aCmdLine.AppendLooseValue(wpath);
#else
    nsAutoCString path;
    MOZ_ALWAYS_SUCCEEDS(aAppDir->GetNativePath(path));
    geckoargs::sAppDir.Put(path.get(), aCmdLine);
#endif

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
    // Full path to the profile dir
    if (aProfileDir) {
      // If the profile doesn't exist, normalization will
      // fail. But we don't return an error here because some
      // tests require startup with a missing profile dir.
      // For users, almost universally, the profile will be in
      // the home directory and normalization isn't required.
      mozilla::Unused << aProfileDir->Normalize();
      nsAutoCString path;
      MOZ_ALWAYS_SUCCEEDS(aProfileDir->GetNativePath(path));
      geckoargs::sProfile.Put(path.get(), aCmdLine);
    }
#endif
  }
}

#if defined(XP_WIN) && (defined(MOZ_SANDBOX) || defined(_ARM64_))
static bool Contains(const std::vector<std::string>& aExtraOpts,
                     const char* aValue) {
  return std::any_of(aExtraOpts.begin(), aExtraOpts.end(),
                     [&](const std::string arg) {
                       return arg.find(aValue) != std::string::npos;
                     });
}
#endif  // defined(XP_WIN) && (defined(MOZ_SANDBOX) || defined(_ARM64_))

RefPtr<ProcessLaunchPromise> BaseProcessLauncher::PerformAsyncLaunch() {
  Result<Ok, LaunchError> aError = DoSetup();
  if (aError.isErr()) {
    return ProcessLaunchPromise::CreateAndReject(aError.unwrapErr(), __func__);
  }
  RefPtr<BaseProcessLauncher> self = this;
  return DoLaunch()->Then(
      mLaunchThread, __func__,
      [self](base::ProcessHandle aHandle) {
        self->mResults.mHandle = aHandle;
        return self->FinishLaunch();
      },
      [](LaunchError aError) {
        return ProcessLaunchPromise::CreateAndReject(aError, __func__);
      });
}

Result<Ok, LaunchError> BaseProcessLauncher::DoSetup() {
  RefPtr<BaseProcessLauncher> self = this;
  GetProfilerEnvVarsForChildProcess([self](const char* key, const char* value) {
    self->mLaunchOptions->env_map[ENVIRONMENT_STRING(key)] =
        ENVIRONMENT_STRING(value);
  });
#ifdef MOZ_MEMORY
  if (mProcessType == GeckoProcessType_Content) {
    nsAutoCString mallocOpts(PR_GetEnv("MALLOC_OPTIONS"));
    // Disable randomization of small arenas in content.
    mallocOpts.Append("r");
    self->mLaunchOptions->env_map[ENVIRONMENT_LITERAL("MALLOC_OPTIONS")] =
        ENVIRONMENT_STRING(mallocOpts.get());
  }
#endif

  MapChildLogging();

  return Ok();
}

void BaseProcessLauncher::MapChildLogging() {
  const char* origNSPRLogName = PR_GetEnv("NSPR_LOG_FILE");
  const char* origMozLogName = PR_GetEnv("MOZ_LOG_FILE");

  if (origNSPRLogName) {
    nsAutoCString nsprLogName;
    GetChildLogName(origNSPRLogName, nsprLogName);
    mLaunchOptions->env_map[ENVIRONMENT_LITERAL("NSPR_LOG_FILE")] =
        ENVIRONMENT_STRING(nsprLogName.get());
  }
  if (origMozLogName) {
    nsAutoCString mozLogName;
    GetChildLogName(origMozLogName, mozLogName);
    mLaunchOptions->env_map[ENVIRONMENT_LITERAL("MOZ_LOG_FILE")] =
        ENVIRONMENT_STRING(mozLogName.get());
  }

  // `RUST_LOG_CHILD` is meant for logging child processes only.
  nsAutoCString childRustLog(PR_GetEnv("RUST_LOG_CHILD"));
  if (!childRustLog.IsEmpty()) {
    mLaunchOptions->env_map[ENVIRONMENT_LITERAL("RUST_LOG")] =
        ENVIRONMENT_STRING(childRustLog.get());
  }
}

Result<Ok, LaunchError> BaseProcessLauncher::DoFinishLaunch() {
  // We're in the parent and the child was launched. Close the child channel
  // handle in the parent as soon as possible, which will allow the parent to
  // detect when the child closes its handle (either due to normal exit or due
  // to crash).
  mClientChannelHandle = nullptr;

  return Ok();
}

#if defined(MOZ_WIDGET_GTK)
Result<Ok, LaunchError> LinuxProcessLauncher::DoSetup() {
  Result<Ok, LaunchError> aError = PosixProcessLauncher::DoSetup();
  if (aError.isErr()) {
    return aError;
  }

  if (mProcessType == GeckoProcessType_Content) {
    // disable IM module to avoid sandbox violation
    mLaunchOptions->env_map["GTK_IM_MODULE"] = "gtk-im-context-simple";

    // Disable ATK accessibility code in content processes because it conflicts
    // with the sandbox, and we proxy that information through the main process
    // anyway.
    mLaunchOptions->env_map["NO_AT_BRIDGE"] = "1";
  }

#  ifdef MOZ_SANDBOX
  if (!mTmpDirName.IsEmpty()) {
    // Point a bunch of things that might want to write from content to our
    // shiny new content-process specific tmpdir
    mLaunchOptions->env_map[ENVIRONMENT_LITERAL("TMPDIR")] =
        ENVIRONMENT_STRING(mTmpDirName.get());
    // Partial fix for bug 1380051 (not persistent - should be)
    mLaunchOptions->env_map[ENVIRONMENT_LITERAL("MESA_GLSL_CACHE_DIR")] =
        ENVIRONMENT_STRING(mTmpDirName.get());
  }
#  endif  // MOZ_SANDBOX

  return Ok();
}
#endif  // MOZ_WIDGET_GTK

#ifdef XP_UNIX
Result<Ok, LaunchError> PosixProcessLauncher::DoSetup() {
  Result<Ok, LaunchError> aError = BaseProcessLauncher::DoSetup();
  if (aError.isErr()) {
    return aError;
  }

  // XPCOM may not be initialized in some subprocesses.  We don't want
  // to initialize XPCOM just for the directory service, especially
  // since LD_LIBRARY_PATH is already set correctly in subprocesses
  // (meaning that we don't need to set that up in the environment).
  if (ShouldHaveDirectoryService()) {
    MOZ_ASSERT(gGREBinPath);
    nsCString path;
    NS_CopyUnicodeToNative(nsDependentString(gGREBinPath), path);
#  if defined(XP_LINUX) || defined(__DragonFly__) || defined(XP_FREEBSD) || \
      defined(XP_NETBSD) || defined(XP_OPENBSD)
    const char* ld_library_path = PR_GetEnv("LD_LIBRARY_PATH");
    nsCString new_ld_lib_path(path.get());

    if (ld_library_path && *ld_library_path) {
      new_ld_lib_path.Append(':');
      new_ld_lib_path.Append(ld_library_path);
    }
    mLaunchOptions->env_map["LD_LIBRARY_PATH"] = new_ld_lib_path.get();

#  elif XP_MACOSX
    // With signed production Mac builds, the dynamic linker (dyld) will
    // ignore dyld environment variables preventing the use of variables
    // such as DYLD_LIBRARY_PATH and DYLD_INSERT_LIBRARIES.

    // If we're running with gtests, add the gtest XUL ahead of normal XUL on
    // the DYLD_LIBRARY_PATH so that plugin-container.app loads it instead.
    nsCString new_dyld_lib_path(path.get());
    if (PR_GetEnv("MOZ_RUN_GTEST")) {
      new_dyld_lib_path = path + "/gtest:"_ns + new_dyld_lib_path;
      mLaunchOptions->env_map["DYLD_LIBRARY_PATH"] = new_dyld_lib_path.get();
    }

    // DYLD_INSERT_LIBRARIES is currently unused by default but we allow
    // it to be set by the external environment.
    const char* interpose = PR_GetEnv("DYLD_INSERT_LIBRARIES");
    if (interpose && strlen(interpose) > 0) {
      mLaunchOptions->env_map["DYLD_INSERT_LIBRARIES"] = interpose;
    }

    // Prevent connection attempts to diagnosticd(8) to save cycles. Log
    // messages can trigger these connection attempts, but access to
    // diagnosticd is blocked in sandboxed child processes.
#    if defined(MOZ_SANDBOX) && defined(XP_MACOSX)
    if (mDisableOSActivityMode) {
      mLaunchOptions->env_map["OS_ACTIVITY_MODE"] = "disable";
    }
#    endif  // defined(MOZ_SANDBOX)
#  endif
  }

  FilePath exePath;
  BinPathType pathType = GetPathToBinary(exePath, mProcessType);

  // remap the IPC socket fd to a well-known int, as the OS does for
  // STDOUT_FILENO, for example
  // The fork server doesn't use IPC::Channel, so can skip this step.
  if (mProcessType != GeckoProcessType_ForkServer) {
#  ifdef MOZ_WIDGET_ANDROID
    // On Android mChannelDstFd is uninitialised and the launching code uses
    // only the first of each pair.
    mLaunchOptions->fds_to_remap.push_back(
        std::pair<int, int>(mClientChannelHandle.get(), -1));
#  else
    MOZ_ASSERT(mChannelDstFd >= 0);
    mLaunchOptions->fds_to_remap.push_back(
        std::pair<int, int>(mClientChannelHandle.get(), mChannelDstFd));
#  endif
  }

  // no need for kProcessChannelID, the child process inherits the
  // other end of the socketpair() from us

  mChildArgv.push_back(exePath.value());

  if (pathType == BinPathType::Self) {
    mChildArgv.push_back("-contentproc");
  }

  mChildArgv.insert(mChildArgv.end(), mExtraOpts.begin(), mExtraOpts.end());

  if ((mProcessType == GeckoProcessType_Content ||
       mProcessType == GeckoProcessType_ForkServer) &&
      Omnijar::IsInitialized()) {
    // Make sure that child processes can find the omnijar, if they
    // use full XPCOM.  See Omnijar::ChildProcessInit and its callers.
    nsAutoCString path;
    nsCOMPtr<nsIFile> greFile = Omnijar::GetPath(Omnijar::GRE);
    if (greFile && NS_SUCCEEDED(greFile->GetNativePath(path))) {
      geckoargs::sGREOmni.Put(path.get(), mChildArgv);
    }
    nsCOMPtr<nsIFile> appFile = Omnijar::GetPath(Omnijar::APP);
    if (appFile && NS_SUCCEEDED(appFile->GetNativePath(path))) {
      geckoargs::sAppOmni.Put(path.get(), mChildArgv);
    }
  }

  if (mProcessType != GeckoProcessType_GMPlugin) {
    // Add the application directory path (-appdir path)
#  ifdef XP_MACOSX
    AddAppDirToCommandLine(mChildArgv, mAppDir, mProfileDir);
#  else
    AddAppDirToCommandLine(mChildArgv, mAppDir, nullptr);
#  endif
  }

  mChildArgv.push_back(mInitialChannelIdString);

  mChildArgv.push_back(mPidString);

  if (!CrashReporter::IsDummy()) {
#  if defined(MOZ_WIDGET_COCOA)
    mChildArgv.push_back(CrashReporter::GetChildNotificationPipe());
#  elif defined(XP_UNIX)
    int childCrashFd, childCrashRemapFd;
    if (NS_WARN_IF(!CrashReporter::CreateNotificationPipeForChild(
            &childCrashFd, &childCrashRemapFd))) {
      return Err(LaunchError("CR::CreateNotificationPipeForChild"));
    }

    if (0 <= childCrashFd) {
      mLaunchOptions->fds_to_remap.push_back(
          std::pair<int, int>(childCrashFd, childCrashRemapFd));
      // "true" == crash reporting enabled
      mChildArgv.push_back("true");
    } else {
      // "false" == crash reporting disabled
      mChildArgv.push_back("false");
    }
#  endif
  }

#  ifdef MOZ_WIDGET_COCOA
  {
    auto* thisMac = static_cast<MacProcessLauncher*>(this);
    kern_return_t kr =
        bootstrap_check_in(bootstrap_port, thisMac->mMachConnectionName.c_str(),
                           getter_Transfers(thisMac->mParentRecvPort));
    if (kr != KERN_SUCCESS) {
      CHROMIUM_LOG(ERROR) << "parent bootstrap_check_in failed: "
                          << mach_error_string(kr);
      return Err(LaunchError("bootstrap_check_in", kr));
    }
    mChildArgv.push_back(thisMac->mMachConnectionName.c_str());
  }
#  endif  // MOZ_WIDGET_COCOA

  mChildArgv.push_back(ChildProcessType());
  return Ok();
}
#endif  // XP_UNIX

#if defined(MOZ_WIDGET_ANDROID)
RefPtr<ProcessHandlePromise> AndroidProcessLauncher::DoLaunch() {
  return LaunchAndroidService(mProcessType, mChildArgv,
                              mLaunchOptions->fds_to_remap);
}
#endif  // MOZ_WIDGET_ANDROID

#ifdef XP_UNIX
RefPtr<ProcessHandlePromise> PosixProcessLauncher::DoLaunch() {
  ProcessHandle handle = 0;
  Result<Ok, LaunchError> aError =
      base::LaunchApp(mChildArgv, std::move(*mLaunchOptions), &handle);
  if (aError.isErr()) {
    return ProcessHandlePromise::CreateAndReject(aError.unwrapErr(), __func__);
  }
  return ProcessHandlePromise::CreateAndResolve(handle, __func__);
}
#endif  // XP_UNIX

#ifdef XP_MACOSX
Result<Ok, LaunchError> MacProcessLauncher::DoFinishLaunch() {
  Result<Ok, LaunchError> aError = PosixProcessLauncher::DoFinishLaunch();
  if (aError.isErr()) {
    return aError;
  }

  MOZ_ASSERT(mParentRecvPort, "should have been configured during DoSetup()");

  // Wait for the child process to send us its 'task_t' data.
  const int kTimeoutMs = 10000;

  mozilla::UniqueMachSendRight child_task;
  audit_token_t audit_token{};
  kern_return_t kr = MachReceivePortSendRight(
      mParentRecvPort, mozilla::Some(kTimeoutMs), &child_task, &audit_token);
  if (kr != KERN_SUCCESS) {
    std::string errString = StringPrintf("0x%x %s", kr, mach_error_string(kr));
    CHROMIUM_LOG(ERROR) << "parent MachReceivePortSendRight failed: "
                        << errString;
    return Err(LaunchError("MachReceivePortSendRight", kr));
  }

  // Ensure the message was sent by the newly spawned child process.
  if (audit_token_to_pid(audit_token) != base::GetProcId(mResults.mHandle)) {
    CHROMIUM_LOG(ERROR) << "task_t was not sent by child process";
    return Err(LaunchError("audit_token_to_pid"));
  }

  // Ensure the task_t corresponds to the newly spawned child process.
  pid_t task_pid = -1;
  kr = pid_for_task(child_task.get(), &task_pid);
  if (kr != KERN_SUCCESS) {
    CHROMIUM_LOG(ERROR) << "pid_for_task failed: " << mach_error_string(kr);
    return Err(LaunchError("pid_for_task", kr));
  }
  if (task_pid != base::GetProcId(mResults.mHandle)) {
    CHROMIUM_LOG(ERROR) << "task_t is not for child process";
    return Err(LaunchError("task_pid"));
  }

  mResults.mChildTask = child_task.release();

  return Ok();
}
#endif  // XP_MACOSX

#ifdef XP_WIN
Result<Ok, LaunchError> WindowsProcessLauncher::DoSetup() {
  Result<Ok, LaunchError> aError = BaseProcessLauncher::DoSetup();
  if (aError.isErr()) {
    return aError;
  }

  FilePath exePath;
  BinPathType pathType = GetPathToBinary(exePath, mProcessType);

#  if defined(MOZ_SANDBOX) || defined(_ARM64_)
  const bool isGMP = mProcessType == GeckoProcessType_GMPlugin;
  const bool isWidevine = isGMP && Contains(mExtraOpts, "gmp-widevinecdm");
#    if defined(_ARM64_)
  bool useRemoteSandboxBroker = false;
  if (mLaunchArch & (base::PROCESS_ARCH_I386 | base::PROCESS_ARCH_X86_64)) {
    // On Windows on ARM64 for ClearKey and Widevine, and for the sandbox
    // launcher process, we want to run the x86 plugin-container.exe in
    // the "i686" subdirectory, instead of the aarch64 plugin-container.exe.
    // So insert "i686" into the exePath.
    exePath = exePath.DirName().AppendASCII("i686").Append(exePath.BaseName());
    useRemoteSandboxBroker =
        mProcessType != GeckoProcessType_RemoteSandboxBroker;
  }
#    endif  // if defined(_ARM64_)
#  endif    // defined(MOZ_SANDBOX) || defined(_ARM64_)

  mCmdLine.emplace(exePath.ToWStringHack());

  if (pathType == BinPathType::Self) {
    mCmdLine->AppendLooseValue(UTF8ToWide("-contentproc"));
  }

#  ifdef HAS_DLL_BLOCKLIST
  if (IsDynamicBlocklistDisabled(
          gSafeMode,
          CommandLine::ForCurrentProcess()->HasSwitch(UTF8ToWide(
              mozilla::geckoargs::sDisableDynamicDllBlocklist.sMatch)))) {
    mCmdLine->AppendLooseValue(
        UTF8ToWide(mozilla::geckoargs::sDisableDynamicDllBlocklist.sMatch));
  }
#  endif  // HAS_DLL_BLOCKLIST

  // Inherit the initial client channel handle into the child process.
  std::wstring processChannelID =
      std::to_wstring(uint32_t(uintptr_t(mClientChannelHandle.get())));
  mLaunchOptions->handles_to_inherit.push_back(mClientChannelHandle.get());
  mCmdLine->AppendSwitchWithValue(switches::kProcessChannelID,
                                  processChannelID);

  for (std::vector<std::string>::iterator it = mExtraOpts.begin();
       it != mExtraOpts.end(); ++it) {
    mCmdLine->AppendLooseValue(UTF8ToWide(*it));
  }

#  if defined(MOZ_SANDBOX)
#    if defined(_ARM64_)
  if (useRemoteSandboxBroker)
    mResults.mSandboxBroker = new RemoteSandboxBroker(mLaunchArch);
  else
#    endif  // if defined(_ARM64_)
    mResults.mSandboxBroker = new SandboxBroker();

  // XXX: Bug 1124167: We should get rid of the process specific logic for
  // sandboxing in this class at some point. Unfortunately it will take a bit
  // of reorganizing so I don't think this patch is the right time.
  switch (mProcessType) {
    case GeckoProcessType_Content:
      if (mSandboxLevel > 0) {
        // For now we treat every failure as fatal in
        // SetSecurityLevelForContentProcess and just crash there right away.
        // Should this change in the future then we should also handle the error
        // here.
        mResults.mSandboxBroker->SetSecurityLevelForContentProcess(
            mSandboxLevel, mIsFileContent);
        mUseSandbox = true;
      }
      break;
    case GeckoProcessType_IPDLUnitTest:
      // XXX: We don't sandbox this process type yet
      break;
    case GeckoProcessType_GMPlugin:
      if (!PR_GetEnv("MOZ_DISABLE_GMP_SANDBOX")) {
        // The Widevine CDM on Windows can only load at USER_RESTRICTED,
        // not at USER_LOCKDOWN. So look in the command line arguments
        // to see if we're loading the path to the Widevine CDM, and if
        // so use sandbox level USER_RESTRICTED instead of USER_LOCKDOWN.
        auto level =
            isWidevine ? SandboxBroker::Restricted : SandboxBroker::LockDown;
        if (NS_WARN_IF(
                !mResults.mSandboxBroker->SetSecurityLevelForGMPlugin(level))) {
          return Err(LaunchError("SetSecurityLevelForGMPlugin"));
        }
        mUseSandbox = true;
      }
      break;
    case GeckoProcessType_GPU:
      if (mSandboxLevel > 0 && !PR_GetEnv("MOZ_DISABLE_GPU_SANDBOX")) {
        // For now we treat every failure as fatal in
        // SetSecurityLevelForGPUProcess and just crash there right away. Should
        // this change in the future then we should also handle the error here.
        mResults.mSandboxBroker->SetSecurityLevelForGPUProcess(mSandboxLevel);
        mUseSandbox = true;
      }
      break;
    case GeckoProcessType_VR:
      if (mSandboxLevel > 0 && !PR_GetEnv("MOZ_DISABLE_VR_SANDBOX")) {
        // TODO: Implement sandbox for VR process, Bug 1430043.
      }
      break;
    case GeckoProcessType_RDD:
      if (!PR_GetEnv("MOZ_DISABLE_RDD_SANDBOX")) {
        if (NS_WARN_IF(
                !mResults.mSandboxBroker->SetSecurityLevelForRDDProcess())) {
          return Err(LaunchError("SetSecurityLevelForRDDProcess"));
        }
        mUseSandbox = true;
      }
      break;
    case GeckoProcessType_Socket:
      if (!PR_GetEnv("MOZ_DISABLE_SOCKET_PROCESS_SANDBOX")) {
        if (NS_WARN_IF(
                !mResults.mSandboxBroker->SetSecurityLevelForSocketProcess())) {
          return Err(LaunchError("SetSecurityLevelForSocketProcess"));
        }
        mUseSandbox = true;
      }
      break;
    case GeckoProcessType_Utility:
      if (IsUtilitySandboxEnabled(mSandbox)) {
        if (!mResults.mSandboxBroker->SetSecurityLevelForUtilityProcess(
                mSandbox)) {
          return Err(LaunchError("SetSecurityLevelForUtilityProcess"));
        }
        mUseSandbox = true;
      }
      break;
    case GeckoProcessType_RemoteSandboxBroker:
      // We don't sandbox the sandbox launcher...
      break;
    case GeckoProcessType_Default:
    default:
      MOZ_CRASH("Bad process type in GeckoChildProcessHost");
      break;
  };

  if (mUseSandbox) {
    for (auto it = mAllowedFilesRead.begin(); it != mAllowedFilesRead.end();
         ++it) {
      mResults.mSandboxBroker->AllowReadFile(it->c_str());
    }

    if (mResults.mSandboxBroker->IsWin32kLockedDown()) {
      mCmdLine->AppendLooseValue(
          UTF8ToWide(geckoargs::sWin32kLockedDown.Name()));
    }
  }
#  endif  // defined(MOZ_SANDBOX)

  // Add the application directory path (-appdir path)
  AddAppDirToCommandLine(mCmdLine.ref(), mAppDir);

  // XXX Command line params past this point are expected to be at
  // the end of the command line string, and in a specific order.
  // See XRE_InitChildProcess in nsEmbedFunction.

  // Win app model id
  mCmdLine->AppendLooseValue(mGroupId.get());

  // Initial MessageChannel id
  mCmdLine->AppendLooseValue(UTF8ToWide(mInitialChannelIdString));

  // Process id
  mCmdLine->AppendLooseValue(UTF8ToWide(mPidString));

  mCmdLine->AppendLooseValue(
      UTF8ToWide(CrashReporter::GetChildNotificationPipe()));

  // Process type
  mCmdLine->AppendLooseValue(UTF8ToWide(ChildProcessType()));

#  ifdef MOZ_SANDBOX
  if (mUseSandbox) {
    // Mark the handles to inherit as inheritable.
    for (HANDLE h : mLaunchOptions->handles_to_inherit) {
      mResults.mSandboxBroker->AddHandleToShare(h);
    }
  }
#  endif  // MOZ_SANDBOX

  return Ok();
}

RefPtr<ProcessHandlePromise> WindowsProcessLauncher::DoLaunch() {
  ProcessHandle handle = 0;
#  ifdef MOZ_SANDBOX
  if (mUseSandbox) {
    const IMAGE_THUNK_DATA* cachedNtdllThunk =
        mCachedNtdllThunk ? mCachedNtdllThunk->begin() : nullptr;
    Result<Ok, LaunchError> err = mResults.mSandboxBroker->LaunchApp(
        mCmdLine->program().c_str(), mCmdLine->command_line_string().c_str(),
        mLaunchOptions->env_map, mProcessType, mEnableSandboxLogging,
        cachedNtdllThunk, &handle);
    if (err.isOk()) {
      EnvironmentLog("MOZ_PROCESS_LOG")
          .print("==> process %d launched child process %d (%S)\n",
                 base::GetCurrentProcId(), base::GetProcId(handle),
                 mCmdLine->command_line_string().c_str());
      return ProcessHandlePromise::CreateAndResolve(handle, __func__);
    }
    return ProcessHandlePromise::CreateAndReject(err.unwrapErr(), __func__);
  }
#  endif  // defined(MOZ_SANDBOX)

  Result<Ok, LaunchError> launchErr =
      base::LaunchApp(mCmdLine.ref(), *mLaunchOptions, &handle);
  if (launchErr.isErr()) {
    return ProcessHandlePromise::CreateAndReject(launchErr.unwrapErr(),
                                                 __func__);
  }
  return ProcessHandlePromise::CreateAndResolve(handle, __func__);
}

Result<Ok, LaunchError> WindowsProcessLauncher::DoFinishLaunch() {
  Result<Ok, LaunchError> err = BaseProcessLauncher::DoFinishLaunch();
  if (err.isErr()) {
    return err;
  }

  return Ok();
}
#endif  // XP_WIN

RefPtr<ProcessLaunchPromise> BaseProcessLauncher::FinishLaunch() {
  Result<Ok, LaunchError> aError = DoFinishLaunch();
  if (aError.isErr()) {
    return ProcessLaunchPromise::CreateAndReject(aError.unwrapErr(), __func__);
  }

  MOZ_DIAGNOSTIC_ASSERT(mResults.mHandle);

  Telemetry::AccumulateTimeDelta(Telemetry::CHILD_PROCESS_LAUNCH_MS,
                                 mStartTimeStamp);

  return ProcessLaunchPromise::CreateAndResolve(mResults, __func__);
}

bool GeckoChildProcessHost::OpenPrivilegedHandle(base::ProcessId aPid) {
  if (mChildProcessHandle) {
    MOZ_ASSERT(aPid == base::GetProcId(mChildProcessHandle));
    return true;
  }

  return base::OpenPrivilegedProcessHandle(aPid, &mChildProcessHandle);
}

void GeckoChildProcessHost::OnChannelConnected(base::ProcessId peer_pid) {
  {
    mozilla::AutoWriteLock hLock(mHandleLock);
    if (!OpenPrivilegedHandle(peer_pid)) {
      MOZ_CRASH("can't open handle to child process");
    }
  }
  MonitorAutoLock lock(mMonitor);
  mProcessState = PROCESS_CONNECTED;
  lock.Notify();
}

RefPtr<ProcessHandlePromise> GeckoChildProcessHost::WhenProcessHandleReady() {
  MOZ_ASSERT(mHandlePromise != nullptr);
  return mHandlePromise;
}

#ifdef MOZ_WIDGET_ANDROID
RefPtr<ProcessHandlePromise> AndroidProcessLauncher::LaunchAndroidService(
    const GeckoProcessType aType, const std::vector<std::string>& argv,
    const base::file_handle_mapping_vector& fds_to_remap) {
  MOZ_RELEASE_ASSERT((2 <= fds_to_remap.size()) && (fds_to_remap.size() <= 5));
  JNIEnv* const env = mozilla::jni::GetEnvForThread();
  MOZ_ASSERT(env);

  const int argvSize = argv.size();
  jni::ObjectArray::LocalRef jargs =
      jni::ObjectArray::New<jni::String>(argvSize);
  for (int ix = 0; ix < argvSize; ix++) {
    jargs->SetElement(ix, jni::StringParam(argv[ix].c_str(), env));
  }

  // XXX: this processing depends entirely on the internals of
  // ContentParent::LaunchSubprocess()
  // GeckoChildProcessHost::PerformAsyncLaunch(), and the order in
  // which they append to fds_to_remap. There must be a better way to do it.
  // See bug 1440207.
  int32_t prefsFd = fds_to_remap[0].first;
  int32_t prefMapFd = fds_to_remap[1].first;
  int32_t ipcFd = fds_to_remap[2].first;
  int32_t crashFd = -1;
  if (fds_to_remap.size() == 4) {
    crashFd = fds_to_remap[3].first;
  }

  auto type = java::GeckoProcessType::FromInt(aType);
  auto genericResult = java::GeckoProcessManager::Start(
      type, jargs, prefsFd, prefMapFd, ipcFd, crashFd);
  auto typedResult = java::GeckoResult::LocalRef(std::move(genericResult));
  return ProcessHandlePromise::FromGeckoResult(typedResult);
}
#endif

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
bool GeckoChildProcessHost::AppendMacSandboxParams(StringVector& aArgs) {
  MacSandboxInfo info;
  if (NS_WARN_IF(!FillMacSandboxInfo(info))) {
    return false;
  }
  info.AppendAsParams(aArgs);
  return true;
}

// Fill |aInfo| with the flags needed to launch the utility sandbox
bool GeckoChildProcessHost::FillMacSandboxInfo(MacSandboxInfo& aInfo) {
  aInfo.type = GetDefaultMacSandboxType();
  aInfo.shouldLog = Preferences::GetBool("security.sandbox.logging.enabled") ||
                    PR_GetEnv("MOZ_SANDBOX_LOGGING");

  nsAutoCString appPath;
  if (!nsMacUtilsImpl::GetAppPath(appPath)) {
    MOZ_CRASH("Failed to get app path");
  }
  aInfo.appPath.assign(appPath.get());
  return true;
}

void GeckoChildProcessHost::DisableOSActivityMode() {
  mDisableOSActivityMode = true;
}

//
// If early sandbox startup is enabled for this process type, map the
// process type to the sandbox type and enable the sandbox. Returns true
// if no errors were encountered or if early sandbox startup is not
// enabled for this process. Returns false if an error was encountered.
//
/* static */
bool GeckoChildProcessHost::StartMacSandbox(int aArgc, char** aArgv,
                                            std::string& aErrorMessage) {
  MacSandboxType sandboxType = MacSandboxType_Invalid;
  switch (XRE_GetProcessType()) {
    // For now, only support early sandbox startup for content,
    // RDD, and GMP processes. Add case statements for the additional
    // process types once early sandbox startup is implemented for them.
    case GeckoProcessType_Content:
      // Content processes don't use GeckoChildProcessHost
      // to configure sandboxing so hard code the sandbox type.
      sandboxType = MacSandboxType_Content;
      break;
    case GeckoProcessType_RDD:
      sandboxType = RDDProcessHost::GetMacSandboxType();
      break;
    case GeckoProcessType_Socket:
      sandboxType = net::SocketProcessHost::GetMacSandboxType();
      break;
    case GeckoProcessType_GMPlugin:
      sandboxType = gmp::GMPProcessParent::GetMacSandboxType();
      break;
    case GeckoProcessType_Utility:
      sandboxType = ipc::UtilityProcessHost::GetMacSandboxType();
      break;
    default:
      return true;
  }

  return mozilla::StartMacSandboxIfEnabled(sandboxType, aArgc, aArgv,
                                           aErrorMessage);
}

#endif /* XP_MACOSX && MOZ_SANDBOX */

/* static */
void GeckoChildProcessHost::GetAll(const GeckoProcessCallback& aCallback) {
  StaticMutexAutoLock lock(sMutex);
  if (!sGeckoChildProcessHosts) {
    return;
  }
  for (GeckoChildProcessHost* gp = sGeckoChildProcessHosts->getFirst(); gp;
       gp = static_cast<mozilla::LinkedListElement<GeckoChildProcessHost>*>(gp)
                ->getNext()) {
    aCallback(gp);
  }
}

RefPtr<ProcessLaunchPromise> BaseProcessLauncher::Launch(
    GeckoChildProcessHost* aHost) {
  AssertIOThread();

  // The ForkServer doesn't use IPC::Channel for communication, so we can skip
  // initializing it.
  if (mProcessType != GeckoProcessType_ForkServer) {
    IPC::Channel::ChannelHandle serverHandle;
    if (!IPC::Channel::CreateRawPipe(&serverHandle, &mClientChannelHandle)) {
      return ProcessLaunchPromise::CreateAndReject(LaunchError("CreateRawPipe"),
                                                   __func__);
    }
    aHost->InitializeChannel(std::move(serverHandle));
  }

  return InvokeAsync(mLaunchThread, this, __func__,
                     &BaseProcessLauncher::PerformAsyncLaunch);
}

}  // namespace ipc
}  // namespace mozilla