-
Notifications
You must be signed in to change notification settings - Fork 10.5k
/
Copy pathSerializedModuleLoader.cpp
1854 lines (1606 loc) · 69.2 KB
/
SerializedModuleLoader.cpp
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
//===--- SerializedModuleLoader.cpp - Import Swift modules ----------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/Serialization/SerializedModuleLoader.h"
#include "ModuleFile.h"
#include "ModuleFileSharedCore.h"
#include "swift/AST/ASTContext.h"
#include "swift/AST/DiagnosticsSema.h"
#include "swift/AST/ImportCache.h"
#include "swift/AST/ModuleDependencies.h"
#include "swift/Basic/Defer.h"
#include "swift/Basic/FileTypes.h"
#include "swift/Basic/Platform.h"
#include "swift/Basic/STLExtras.h"
#include "swift/Basic/SourceManager.h"
#include "swift/Basic/Version.h"
#include "swift/Frontend/ModuleInterfaceLoader.h"
#include "swift/Option/Options.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/ArgList.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/TargetParser/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/CommandLine.h"
#include <system_error>
using namespace swift;
using swift::version::Version;
namespace {
/// Apply \c body for each target-specific module file base name to search from
/// most to least desirable.
void forEachTargetModuleBasename(const ASTContext &Ctx,
llvm::function_ref<void(StringRef)> body) {
auto normalizedTarget = getTargetSpecificModuleTriple(Ctx.LangOpts.Target);
// An arm64 module can import an arm64e module.
llvm::Optional<llvm::Triple> normalizedAltTarget;
if ((normalizedTarget.getArch() == llvm::Triple::ArchType::aarch64) &&
(normalizedTarget.getSubArch() !=
llvm::Triple::SubArchType::AArch64SubArch_arm64e)) {
auto altTarget = normalizedTarget;
altTarget.setArchName("arm64e");
normalizedAltTarget = getTargetSpecificModuleTriple(altTarget);
}
body(normalizedTarget.str());
if (normalizedAltTarget) {
body(normalizedAltTarget->str());
}
// We used the un-normalized architecture as a target-specific
// module name. Fall back to that behavior.
body(Ctx.LangOpts.Target.getArchName());
// FIXME: We used to use "major architecture" names for these files---the
// names checked in "#if arch(...)". Fall back to that name in the one case
// where it's different from what Swift 4.2 supported:
// - 32-bit ARM platforms (formerly "arm")
// We should be able to drop this once there's an Xcode that supports the
// new names.
if (Ctx.LangOpts.Target.getArch() == llvm::Triple::ArchType::arm) {
body("arm");
}
if (normalizedAltTarget) {
body(normalizedAltTarget->getArchName());
}
}
/// Apply \p body for each module search path in \p Ctx until \p body returns
/// non-None value. Returns the return value from \p body, or \c None.
llvm::Optional<bool> forEachModuleSearchPath(
const ASTContext &Ctx,
llvm::function_ref<llvm::Optional<bool>(StringRef, ModuleSearchPathKind,
bool isSystem)>
callback) {
for (const auto &path : Ctx.SearchPathOpts.getImportSearchPaths())
if (auto result =
callback(path, ModuleSearchPathKind::Import, /*isSystem=*/false))
return result;
for (const auto &path : Ctx.SearchPathOpts.getFrameworkSearchPaths())
if (auto result =
callback(path.Path, ModuleSearchPathKind::Framework, path.IsSystem))
return result;
// Apple platforms have extra implicit framework search paths:
// $SDKROOT/System/Library/Frameworks/ and $SDKROOT/Library/Frameworks/.
if (Ctx.LangOpts.Target.isOSDarwin()) {
for (const auto &path : Ctx.getDarwinImplicitFrameworkSearchPaths())
if (auto result =
callback(path, ModuleSearchPathKind::DarwinImplicitFramework,
/*isSystem=*/true))
return result;
}
for (const auto &importPath :
Ctx.SearchPathOpts.getRuntimeLibraryImportPaths()) {
if (auto result = callback(importPath, ModuleSearchPathKind::RuntimeLibrary,
/*isSystem=*/true))
return result;
}
return llvm::None;
}
} // end unnamed namespace
// Defined out-of-line so that we can see ~ModuleFile.
SerializedModuleLoaderBase::SerializedModuleLoaderBase(
ASTContext &ctx, DependencyTracker *tracker, ModuleLoadingMode loadMode,
bool IgnoreSwiftSourceInfoFile)
: ModuleLoader(tracker), Ctx(ctx), LoadMode(loadMode),
IgnoreSwiftSourceInfoFile(IgnoreSwiftSourceInfoFile) {}
SerializedModuleLoaderBase::~SerializedModuleLoaderBase() = default;
ImplicitSerializedModuleLoader::~ImplicitSerializedModuleLoader() = default;
MemoryBufferSerializedModuleLoader::~MemoryBufferSerializedModuleLoader() =
default;
void SerializedModuleLoaderBase::collectVisibleTopLevelModuleNamesImpl(
SmallVectorImpl<Identifier> &names, StringRef extension) const {
llvm::SmallString<16> moduleSuffix;
moduleSuffix += '.';
moduleSuffix += file_types::getExtension(file_types::TY_SwiftModuleFile);
llvm::SmallString<16> suffix;
suffix += '.';
suffix += extension;
SmallVector<SmallString<64>, 2> targetFiles;
forEachTargetModuleBasename(Ctx, [&](StringRef targetName) {
targetFiles.emplace_back(targetName);
targetFiles.back() += suffix;
});
auto &fs = *Ctx.SourceMgr.getFileSystem();
// Apply \p body for each directory entry in \p dirPath.
auto forEachDirectoryEntryPath =
[&](StringRef dirPath, llvm::function_ref<void(StringRef)> body) {
std::error_code errorCode;
llvm::vfs::directory_iterator DI = fs.dir_begin(dirPath, errorCode);
llvm::vfs::directory_iterator End;
for (; !errorCode && DI != End; DI.increment(errorCode))
body(DI->path());
};
// Check whether target specific module file exists or not in given directory.
// $PATH/{arch}.{extension}
auto checkTargetFiles = [&](StringRef path) -> bool {
llvm::SmallString<256> scratch;
for (auto targetFile : targetFiles) {
scratch.clear();
llvm::sys::path::append(scratch, path, targetFile);
// If {arch}.{extension} exists, consider it's visible. Technically, we
// should check the file type, permission, format, etc., but it's too
// heavy to do that for each files.
if (fs.exists(scratch))
return true;
}
return false;
};
forEachModuleSearchPath(Ctx, [&](StringRef searchPath,
ModuleSearchPathKind Kind, bool isSystem) {
switch (Kind) {
case ModuleSearchPathKind::Import: {
// Look for:
// $PATH/{name}.swiftmodule/{arch}.{extension} or
// $PATH/{name}.{extension}
forEachDirectoryEntryPath(searchPath, [&](StringRef path) {
auto pathExt = llvm::sys::path::extension(path);
if (pathExt != moduleSuffix && pathExt != suffix)
return;
auto stat = fs.status(path);
if (!stat)
return;
if (pathExt == moduleSuffix && stat->isDirectory()) {
if (!checkTargetFiles(path))
return;
} else if (pathExt != suffix || stat->isDirectory()) {
return;
}
// Extract module name.
auto name = llvm::sys::path::filename(path).drop_back(pathExt.size());
names.push_back(Ctx.getIdentifier(name));
});
return llvm::None;
}
case ModuleSearchPathKind::RuntimeLibrary: {
// Look for:
// (Darwin OS) $PATH/{name}.swiftmodule/{arch}.{extension}
// (Other OS) $PATH/{name}.{extension}
bool requireTargetSpecificModule = Ctx.LangOpts.Target.isOSDarwin();
forEachDirectoryEntryPath(searchPath, [&](StringRef path) {
auto pathExt = llvm::sys::path::extension(path);
if (pathExt != moduleSuffix)
if (requireTargetSpecificModule || pathExt != suffix)
return;
if (!checkTargetFiles(path)) {
if (requireTargetSpecificModule)
return;
auto stat = fs.status(path);
if (!stat || stat->isDirectory())
return;
}
// Extract module name.
auto name = llvm::sys::path::filename(path).drop_back(pathExt.size());
names.push_back(Ctx.getIdentifier(name));
});
return llvm::None;
}
case ModuleSearchPathKind::Framework:
case ModuleSearchPathKind::DarwinImplicitFramework: {
// Look for:
// $PATH/{name}.framework/Modules/{name}.swiftmodule/{arch}.{extension}
forEachDirectoryEntryPath(searchPath, [&](StringRef path) {
if (llvm::sys::path::extension(path) != ".framework")
return;
// Extract Framework name.
auto name = llvm::sys::path::filename(path).drop_back(
StringLiteral(".framework").size());
SmallString<256> moduleDir;
llvm::sys::path::append(moduleDir, path, "Modules",
name + moduleSuffix);
if (!checkTargetFiles(moduleDir))
return;
names.push_back(Ctx.getIdentifier(name));
});
return llvm::None;
}
}
llvm_unreachable("covered switch");
});
}
void ImplicitSerializedModuleLoader::collectVisibleTopLevelModuleNames(
SmallVectorImpl<Identifier> &names) const {
collectVisibleTopLevelModuleNamesImpl(
names, file_types::getExtension(file_types::TY_SwiftModuleFile));
}
std::error_code SerializedModuleLoaderBase::openModuleDocFileIfPresent(
ImportPath::Element ModuleID,
const SerializedModuleBaseName &BaseName,
std::unique_ptr<llvm::MemoryBuffer> *ModuleDocBuffer) {
if (!ModuleDocBuffer)
return std::error_code();
llvm::vfs::FileSystem &FS = *Ctx.SourceMgr.getFileSystem();
// Try to open the module documentation file. If it does not exist, ignore
// the error. However, pass though all other errors.
SmallString<256>
ModuleDocPath{BaseName.getName(file_types::TY_SwiftModuleDocFile)};
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ModuleDocOrErr =
FS.getBufferForFile(ModuleDocPath);
if (ModuleDocOrErr) {
*ModuleDocBuffer = std::move(*ModuleDocOrErr);
} else if (ModuleDocOrErr.getError() !=
std::errc::no_such_file_or_directory) {
return ModuleDocOrErr.getError();
}
return std::error_code();
}
std::unique_ptr<llvm::MemoryBuffer>
SerializedModuleLoaderBase::getModuleName(ASTContext &Ctx, StringRef modulePath,
std::string &Name) {
return ModuleFile::getModuleName(Ctx, modulePath, Name);
}
std::error_code
SerializedModuleLoaderBase::openModuleSourceInfoFileIfPresent(
ImportPath::Element ModuleID,
const SerializedModuleBaseName &BaseName,
std::unique_ptr<llvm::MemoryBuffer> *ModuleSourceInfoBuffer) {
if (IgnoreSwiftSourceInfoFile || !ModuleSourceInfoBuffer)
return std::error_code();
llvm::vfs::FileSystem &FS = *Ctx.SourceMgr.getFileSystem();
llvm::SmallString<128>
PathWithoutProjectDir{BaseName.getName(file_types::TY_SwiftSourceInfoFile)};
llvm::SmallString<128> PathWithProjectDir = PathWithoutProjectDir;
// Insert "Project" before the filename in PathWithProjectDir.
StringRef FileName = llvm::sys::path::filename(PathWithoutProjectDir);
llvm::sys::path::remove_filename(PathWithProjectDir);
llvm::sys::path::append(PathWithProjectDir, "Project");
llvm::sys::path::append(PathWithProjectDir, FileName);
// Try to open the module source info file from the "Project" directory.
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
ModuleSourceInfoOrErr = FS.getBufferForFile(PathWithProjectDir);
// If it does not exist, try to open the module source info file adjacent to
// the .swiftmodule file.
if (ModuleSourceInfoOrErr.getError() == std::errc::no_such_file_or_directory)
ModuleSourceInfoOrErr = FS.getBufferForFile(PathWithoutProjectDir);
// If we ended up with a different file system error, return it.
if (ModuleSourceInfoOrErr)
*ModuleSourceInfoBuffer = std::move(*ModuleSourceInfoOrErr);
else if (ModuleSourceInfoOrErr.getError() !=
std::errc::no_such_file_or_directory)
return ModuleSourceInfoOrErr.getError();
return std::error_code();
}
std::error_code SerializedModuleLoaderBase::openModuleFile(
ImportPath::Element ModuleID, const SerializedModuleBaseName &BaseName,
std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer) {
llvm::vfs::FileSystem &FS = *Ctx.SourceMgr.getFileSystem();
// Try to open the module file first. If we fail, don't even look for the
// module documentation file.
SmallString<256> ModulePath{BaseName.getName(file_types::TY_SwiftModuleFile)};
// If there's no buffer to load into, simply check for the existence of
// the module file.
if (!ModuleBuffer) {
llvm::ErrorOr<llvm::vfs::Status> statResult = FS.status(ModulePath);
if (!statResult)
return statResult.getError();
if (!statResult->exists())
return std::make_error_code(std::errc::no_such_file_or_directory);
// FIXME: llvm::vfs::FileSystem doesn't give us information on whether or
// not we can /read/ the file without actually trying to do so.
return std::error_code();
}
// Actually load the file and error out if necessary.
//
// Use the default arguments except for IsVolatile that is set by the
// frontend option -enable-volatile-modules. If set, we avoid the use of
// mmap to workaround issues on NFS when the swiftmodule file loaded changes
// on disk while it's in use.
//
// In practice, a swiftmodule file can chane when a client uses a
// swiftmodule file from a framework while the framework is recompiled and
// installed over existing files. Or when many processes rebuild the same
// module interface.
//
// We have seen these scenarios leading to deserialization errors that on
// the surface look like memory corruption.
//
// rdar://63755989
bool enableVolatileModules = Ctx.LangOpts.EnableVolatileModules;
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ModuleOrErr =
FS.getBufferForFile(ModulePath,
/*FileSize=*/-1,
/*RequiresNullTerminator=*/true,
/*IsVolatile=*/enableVolatileModules);
if (!ModuleOrErr)
return ModuleOrErr.getError();
*ModuleBuffer = std::move(ModuleOrErr.get());
return std::error_code();
}
llvm::ErrorOr<SerializedModuleLoaderBase::BinaryModuleImports>
SerializedModuleLoaderBase::getImportsOfModule(
Twine modulePath, ModuleLoadingBehavior transitiveBehavior,
bool isFramework, bool isRequiredOSSAModules, StringRef SDKName,
StringRef packageName, llvm::vfs::FileSystem *fileSystem,
PathObfuscator &recoverer) {
auto moduleBuf = fileSystem->getBufferForFile(modulePath);
if (!moduleBuf)
return moduleBuf.getError();
llvm::StringSet<> importedModuleNames;
llvm::StringSet<> importedHeaders;
// Load the module file without validation.
std::shared_ptr<const ModuleFileSharedCore> loadedModuleFile;
serialization::ValidationInfo loadInfo = ModuleFileSharedCore::load(
"", "", std::move(moduleBuf.get()), nullptr, nullptr, isFramework,
isRequiredOSSAModules, SDKName, recoverer, loadedModuleFile);
for (const auto &dependency : loadedModuleFile->getDependencies()) {
if (dependency.isHeader()) {
importedHeaders.insert(dependency.RawPath);
continue;
}
ModuleLoadingBehavior dependencyTransitiveBehavior =
loadedModuleFile->getTransitiveLoadingBehavior(
dependency,
/*debuggerMode*/ false,
/*isPartialModule*/ false, packageName,
loadedModuleFile->isTestable());
if (dependencyTransitiveBehavior > transitiveBehavior)
continue;
// Find the top-level module name.
auto modulePathStr = dependency.getPrettyPrintedPath();
StringRef moduleName = modulePathStr;
auto dotPos = moduleName.find('.');
if (dotPos != std::string::npos)
moduleName = moduleName.slice(0, dotPos);
importedModuleNames.insert(moduleName);
}
return SerializedModuleLoaderBase::BinaryModuleImports{importedModuleNames, importedHeaders};
}
llvm::ErrorOr<ModuleDependencyInfo>
SerializedModuleLoaderBase::scanModuleFile(Twine modulePath, bool isFramework) {
const std::string moduleDocPath;
const std::string sourceInfoPath;
// Some transitive dependencies of binary modules are not required to be
// imported during normal builds.
// TODO: This is worth revisiting for debugger purposes where
// loading the module is optional, and implementation-only imports
// from modules with testing enabled where the dependency is
// optional.
ModuleLoadingBehavior transitiveLoadingBehavior =
ModuleLoadingBehavior::Required;
auto binaryModuleImports = getImportsOfModule(
modulePath, transitiveLoadingBehavior, isFramework,
isRequiredOSSAModules(), Ctx.LangOpts.SDKName, Ctx.LangOpts.PackageName,
Ctx.SourceMgr.getFileSystem().get(),
Ctx.SearchPathOpts.DeserializedPathRecoverer);
if (!binaryModuleImports)
return binaryModuleImports.getError();
// Lookup optional imports of this module also
auto binaryModuleOptionalImports = getImportsOfModule(
modulePath, ModuleLoadingBehavior::Optional, isFramework,
isRequiredOSSAModules(), Ctx.LangOpts.SDKName, Ctx.LangOpts.PackageName,
Ctx.SourceMgr.getFileSystem().get(),
Ctx.SearchPathOpts.DeserializedPathRecoverer);
if (!binaryModuleOptionalImports)
return binaryModuleImports.getError();
auto importedModuleSet = binaryModuleImports.get().moduleImports;
std::vector<std::string> importedModuleNames;
importedModuleNames.reserve(importedModuleSet.size());
llvm::transform(importedModuleSet.keys(),
std::back_inserter(importedModuleNames),
[](llvm::StringRef N) {
return N.str();
});
auto importedHeaderSet = binaryModuleImports.get().headerImports;
std::vector<std::string> importedHeaders;
// FIXME: We only record these dependencies in CAS mode, because
// we require explicit PCH tasks to be produced for imported header
// of binary module dependencies. In the meantime, in non-CAS mode
// loading clients will consume the `.h` files encoded in the `.swiftmodules`
// directly.
if (Ctx.ClangImporterOpts.CASOpts) {
importedHeaders.reserve(importedHeaderSet.size());
llvm::transform(importedHeaderSet.keys(),
std::back_inserter(importedHeaders),
[](llvm::StringRef N) {
return N.str();
});
}
auto &importedOptionalModuleSet = binaryModuleOptionalImports.get().moduleImports;
std::vector<std::string> importedOptionalModuleNames;
for (const auto optionalImportedModule : importedOptionalModuleSet.keys())
if (!importedModuleSet.contains(optionalImportedModule))
importedOptionalModuleNames.push_back(optionalImportedModule.str());
// Map the set of dependencies over to the "module dependencies".
auto dependencies = ModuleDependencyInfo::forSwiftBinaryModule(
modulePath.str(), moduleDocPath, sourceInfoPath,
importedModuleNames, importedOptionalModuleNames,
importedHeaders, isFramework, /*module-cache-key*/ "");
return std::move(dependencies);
}
std::error_code ImplicitSerializedModuleLoader::findModuleFilesInDirectory(
ImportPath::Element ModuleID, const SerializedModuleBaseName &BaseName,
SmallVectorImpl<char> *ModuleInterfacePath,
SmallVectorImpl<char> *ModuleInterfaceSourcePath,
std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer,
std::unique_ptr<llvm::MemoryBuffer> *ModuleDocBuffer,
std::unique_ptr<llvm::MemoryBuffer> *ModuleSourceInfoBuffer,
bool skipBuildingInterface, bool IsFramework, bool IsTestableDependencyLookup) {
if (LoadMode == ModuleLoadingMode::OnlyInterface ||
Ctx.IgnoreAdjacentModules)
return std::make_error_code(std::errc::not_supported);
auto ModuleErr = openModuleFile(ModuleID, BaseName, ModuleBuffer);
if (ModuleErr)
return ModuleErr;
if (ModuleInterfaceSourcePath) {
if (auto InterfacePath =
BaseName.findInterfacePath(*Ctx.SourceMgr.getFileSystem(), Ctx))
ModuleInterfaceSourcePath->assign(InterfacePath->begin(),
InterfacePath->end());
}
if (auto ModuleSourceInfoError = openModuleSourceInfoFileIfPresent(
ModuleID, BaseName, ModuleSourceInfoBuffer))
return ModuleSourceInfoError;
if (auto ModuleDocErr =
openModuleDocFileIfPresent(ModuleID, BaseName, ModuleDocBuffer))
return ModuleDocErr;
return std::error_code();
}
bool ImplicitSerializedModuleLoader::maybeDiagnoseTargetMismatch(
SourceLoc sourceLocation, StringRef moduleName,
const SerializedModuleBaseName &absoluteBaseName) {
llvm::vfs::FileSystem &fs = *Ctx.SourceMgr.getFileSystem();
// Get the last component of the base name, which is the target-specific one.
auto target = llvm::sys::path::filename(absoluteBaseName.baseName);
// Strip off the last component to get the .swiftmodule folder.
auto dir = absoluteBaseName.baseName;
llvm::sys::path::remove_filename(dir);
std::error_code errorCode;
std::string foundArchs;
for (llvm::vfs::directory_iterator directoryIterator =
fs.dir_begin(dir, errorCode), endIterator;
directoryIterator != endIterator;
directoryIterator.increment(errorCode)) {
if (errorCode)
return false;
StringRef filePath = directoryIterator->path();
StringRef extension = llvm::sys::path::extension(filePath);
if (file_types::lookupTypeForExtension(extension) ==
file_types::TY_SwiftModuleFile) {
if (!foundArchs.empty())
foundArchs += ", ";
foundArchs += llvm::sys::path::stem(filePath).str();
}
}
if (foundArchs.empty()) {
// Maybe this swiftmodule directory only contains swiftinterfaces, or
// maybe something else is going on. Regardless, we shouldn't emit a
// possibly incorrect diagnostic.
return false;
}
Ctx.Diags.diagnose(sourceLocation, diag::sema_no_import_target, moduleName,
target, foundArchs, dir);
return true;
}
SerializedModuleBaseName::SerializedModuleBaseName(
StringRef parentDir, const SerializedModuleBaseName &name)
: baseName(parentDir) {
llvm::sys::path::append(baseName, name.baseName);
}
std::string SerializedModuleBaseName::getName(file_types::ID fileTy) const {
auto result = baseName;
result += '.';
result += file_types::getExtension(fileTy);
return std::string(result.str());
}
llvm::Optional<std::string> SerializedModuleBaseName::getPackageInterfacePathIfInSamePackage(llvm::vfs::FileSystem &fs, ASTContext &ctx) const {
if (!ctx.LangOpts.EnablePackageInterfaceLoad)
return {};
std::string packagePath{
getName(file_types::TY_PackageSwiftModuleInterfaceFile)};
if (fs.exists(packagePath)) {
// Read the interface file and extract its package-name argument value
StringRef result;
if (auto packageFile = llvm::MemoryBuffer::getFile(packagePath)) {
llvm::BumpPtrAllocator alloc;
llvm::StringSaver argSaver(alloc);
SmallVector<const char*, 8> args;
(void)extractCompilerFlagsFromInterface(packagePath,
(*packageFile)->getBuffer(), argSaver, args);
for (unsigned I = 0, N = args.size(); I + 1 < N; I++) {
StringRef current(args[I]), next(args[I + 1]);
if (current == "-package-name") {
// Instead of `break` here, continue to get the last value in case of dupes,
// to be consistent with the default parsing logic.
result = next;
}
}
}
// Return the .package.swiftinterface path if the package name applies to
// the importer module.
if (!result.empty() && result == ctx.LangOpts.PackageName)
return packagePath;
}
return {};
}
llvm::Optional<std::string>
SerializedModuleBaseName::findInterfacePath(llvm::vfs::FileSystem &fs, ASTContext &ctx) const {
std::string interfacePath{getName(file_types::TY_SwiftModuleInterfaceFile)};
// Ensure the public swiftinterface already exists, otherwise bail early
// as it's considered the module doesn't exist.
if (!fs.exists(interfacePath))
return {};
// Check if a package interface exists and if the package name applies to
// the importer module.
auto pkgPath = getPackageInterfacePathIfInSamePackage(fs, ctx).value_or("");
if (fs.exists(pkgPath))
return pkgPath;
// If above fails, use the existing logic as fallback.
// If present, use the private interface instead of the public one.
std::string privatePath{
getName(file_types::TY_PrivateSwiftModuleInterfaceFile)};
if (fs.exists(privatePath))
return privatePath;
// Otherwise return the public .swiftinterface path
return interfacePath;
}
bool SerializedModuleLoaderBase::findModule(
ImportPath::Element moduleID, SmallVectorImpl<char> *moduleInterfacePath,
SmallVectorImpl<char> *moduleInterfaceSourcePath,
std::unique_ptr<llvm::MemoryBuffer> *moduleBuffer,
std::unique_ptr<llvm::MemoryBuffer> *moduleDocBuffer,
std::unique_ptr<llvm::MemoryBuffer> *moduleSourceInfoBuffer,
bool skipBuildingInterface, bool isTestableDependencyLookup,
bool &isFramework, bool &isSystemModule) {
// Find a module with an actual, physical name on disk, in case
// -module-alias is used (otherwise same).
//
// For example, if '-module-alias Foo=Bar' is passed in to the frontend,
// and a source file has 'import Foo', a module called Bar (real name)
// should be searched.
StringRef moduleNameRef = Ctx.getRealModuleName(moduleID.Item).str();
SmallString<32> moduleName(moduleNameRef);
SerializedModuleBaseName genericBaseName(moduleName);
auto genericModuleFileName =
genericBaseName.getName(file_types::TY_SwiftModuleFile);
SmallVector<SerializedModuleBaseName, 4> targetSpecificBaseNames;
forEachTargetModuleBasename(Ctx, [&](StringRef targetName) {
// Construct a base name like ModuleName.swiftmodule/arch-vendor-os
SmallString<64> targetBaseName{genericModuleFileName};
llvm::sys::path::append(targetBaseName, targetName);
targetSpecificBaseNames.emplace_back(targetBaseName.str());
});
auto &fs = *Ctx.SourceMgr.getFileSystem();
llvm::SmallString<256> currPath;
enum class SearchResult { Found, NotFound, Error };
/// Returns true if a target-specific module file was found, false if an error
/// was diagnosed, or None if neither one happened and the search should
/// continue.
auto findTargetSpecificModuleFiles = [&](bool IsFramework) -> SearchResult {
llvm::Optional<SerializedModuleBaseName> firstAbsoluteBaseName;
for (const auto &targetSpecificBaseName : targetSpecificBaseNames) {
SerializedModuleBaseName
absoluteBaseName{currPath, targetSpecificBaseName};
if (!firstAbsoluteBaseName.has_value())
firstAbsoluteBaseName.emplace(absoluteBaseName);
auto result = findModuleFilesInDirectory(
moduleID, absoluteBaseName, moduleInterfacePath,
moduleInterfaceSourcePath, moduleBuffer, moduleDocBuffer,
moduleSourceInfoBuffer, skipBuildingInterface,
IsFramework, isTestableDependencyLookup);
if (!result) {
return SearchResult::Found;
} else if (result == std::errc::not_supported) {
return SearchResult::Error;
} else if (result != std::errc::no_such_file_or_directory) {
return SearchResult::NotFound;
}
}
// We can only get here if all targetFileNamePairs failed with
// 'std::errc::no_such_file_or_directory'.
if (firstAbsoluteBaseName
&& maybeDiagnoseTargetMismatch(moduleID.Loc, moduleName,
*firstAbsoluteBaseName)) {
return SearchResult::Error;
} else {
return SearchResult::NotFound;
}
};
SmallVector<std::string, 4> InterestingFilenames = {
(moduleName + ".framework").str(),
genericBaseName.getName(file_types::TY_SwiftModuleInterfaceFile),
genericBaseName.getName(file_types::TY_PrivateSwiftModuleInterfaceFile),
genericBaseName.getName(file_types::TY_PackageSwiftModuleInterfaceFile),
genericBaseName.getName(file_types::TY_SwiftModuleFile)};
auto searchPaths = Ctx.SearchPathOpts.moduleSearchPathsContainingFile(
InterestingFilenames, Ctx.SourceMgr.getFileSystem().get(),
Ctx.LangOpts.Target.isOSDarwin());
for (const auto &searchPath : searchPaths) {
currPath = searchPath->getPath();
isSystemModule = searchPath->isSystem();
switch (searchPath->getKind()) {
case ModuleSearchPathKind::Import:
case ModuleSearchPathKind::RuntimeLibrary: {
isFramework = false;
// On Apple platforms, we can assume that the runtime libraries use
// target-specific module files within a `.swiftmodule` directory.
// This was not always true on non-Apple platforms, and in order to
// ease the transition, check both layouts.
bool checkTargetSpecificModule = true;
if (searchPath->getKind() != ModuleSearchPathKind::RuntimeLibrary ||
!Ctx.LangOpts.Target.isOSDarwin()) {
auto modulePath = currPath;
llvm::sys::path::append(modulePath, genericModuleFileName);
llvm::ErrorOr<llvm::vfs::Status> statResult = fs.status(modulePath);
// Even if stat fails, we can't just return the error; the path
// we're looking for might not be "Foo.swiftmodule".
checkTargetSpecificModule = statResult && statResult->isDirectory();
}
if (checkTargetSpecificModule) {
// A .swiftmodule directory contains architecture-specific files.
switch (findTargetSpecificModuleFiles(isFramework)) {
case SearchResult::Found:
return true;
case SearchResult::NotFound:
continue;
case SearchResult::Error:
return false;
}
}
SerializedModuleBaseName absoluteBaseName{currPath, genericBaseName};
auto result = findModuleFilesInDirectory(
moduleID, absoluteBaseName, moduleInterfacePath,
moduleInterfaceSourcePath, moduleBuffer, moduleDocBuffer,
moduleSourceInfoBuffer, skipBuildingInterface, isFramework);
if (!result) {
return true;
} else if (result == std::errc::not_supported) {
return false;
} else {
continue;
}
}
case ModuleSearchPathKind::Framework:
case ModuleSearchPathKind::DarwinImplicitFramework: {
isFramework = true;
llvm::sys::path::append(currPath, moduleName + ".framework");
// Check if the framework directory exists.
if (!fs.exists(currPath)) {
continue;
}
// Frameworks always use architecture-specific files within a
// .swiftmodule directory.
llvm::sys::path::append(currPath, "Modules");
switch (findTargetSpecificModuleFiles(isFramework)) {
case SearchResult::Found:
return true;
case SearchResult::NotFound:
continue;
case SearchResult::Error:
return false;
}
}
}
llvm_unreachable("covered switch");
}
return false;
}
static std::pair<StringRef, clang::VersionTuple>
getOSAndVersionForDiagnostics(const llvm::Triple &triple) {
StringRef osName;
llvm::VersionTuple osVersion;
if (triple.isMacOSX()) {
// macOS triples represent their versions differently, so we have to use the
// special accessor.
triple.getMacOSXVersion(osVersion);
osName = swift::prettyPlatformString(PlatformKind::macOS);
} else {
osVersion = triple.getOSVersion();
if (triple.isWatchOS()) {
osName = swift::prettyPlatformString(PlatformKind::watchOS);
} else if (triple.isTvOS()) {
assert(triple.isiOS() &&
"LLVM treats tvOS as a kind of iOS, so tvOS is checked first");
osName = swift::prettyPlatformString(PlatformKind::tvOS);
} else if (triple.isiOS()) {
osName = swift::prettyPlatformString(PlatformKind::iOS);
} else {
assert(!triple.isOSDarwin() && "unknown Apple OS");
// Fallback to the LLVM triple name. This isn't great (it won't be
// capitalized or anything), but it's better than nothing.
osName = triple.getOSName();
}
}
assert(!osName.empty());
return {osName, osVersion};
}
LoadedFile *SerializedModuleLoaderBase::loadAST(
ModuleDecl &M, llvm::Optional<SourceLoc> diagLoc,
StringRef moduleInterfacePath, StringRef moduleInterfaceSourcePath,
std::unique_ptr<llvm::MemoryBuffer> moduleInputBuffer,
std::unique_ptr<llvm::MemoryBuffer> moduleDocInputBuffer,
std::unique_ptr<llvm::MemoryBuffer> moduleSourceInfoInputBuffer,
bool isFramework) {
assert(moduleInputBuffer);
// The buffers are moved into the shared core, so grab their IDs now in case
// they're needed for diagnostics later.
StringRef moduleBufferID = moduleInputBuffer->getBufferIdentifier();
StringRef moduleDocBufferID;
if (moduleDocInputBuffer)
moduleDocBufferID = moduleDocInputBuffer->getBufferIdentifier();
StringRef moduleSourceInfoID;
if (moduleSourceInfoInputBuffer)
moduleSourceInfoID = moduleSourceInfoInputBuffer->getBufferIdentifier();
if (moduleInputBuffer->getBufferSize() % 4 != 0) {
if (diagLoc)
Ctx.Diags.diagnose(*diagLoc, diag::serialization_malformed_module,
moduleBufferID);
return nullptr;
}
std::unique_ptr<ModuleFile> loadedModuleFile;
std::shared_ptr<const ModuleFileSharedCore> loadedModuleFileCore;
serialization::ValidationInfo loadInfo = ModuleFileSharedCore::load(
moduleInterfacePath, moduleInterfaceSourcePath,
std::move(moduleInputBuffer), std::move(moduleDocInputBuffer),
std::move(moduleSourceInfoInputBuffer), isFramework,
isRequiredOSSAModules(), Ctx.LangOpts.SDKName,
Ctx.SearchPathOpts.DeserializedPathRecoverer, loadedModuleFileCore);
SerializedASTFile *fileUnit = nullptr;
if (loadInfo.status == serialization::Status::Valid) {
loadedModuleFile =
std::make_unique<ModuleFile>(std::move(loadedModuleFileCore));
M.setResilienceStrategy(loadedModuleFile->getResilienceStrategy());
// We've loaded the file. Now try to bring it into the AST.
fileUnit = new (Ctx) SerializedASTFile(M, *loadedModuleFile);
M.setStaticLibrary(loadedModuleFile->isStaticLibrary());
M.setHasHermeticSealAtLink(loadedModuleFile->hasHermeticSealAtLink());
M.setIsEmbeddedSwiftModule(loadedModuleFile->isEmbeddedSwiftModule());
if (loadedModuleFile->isTestable())
M.setTestingEnabled();
if (loadedModuleFile->arePrivateImportsEnabled())
M.setPrivateImportsEnabled();
if (loadedModuleFile->isImplicitDynamicEnabled())
M.setImplicitDynamicEnabled();
if (loadedModuleFile->hasIncrementalInfo())
M.setHasIncrementalInfo();
if (loadedModuleFile->isBuiltFromInterface())
M.setIsBuiltFromInterface();
if (!loadedModuleFile->getModuleABIName().empty())
M.setABIName(Ctx.getIdentifier(loadedModuleFile->getModuleABIName()));
if (loadedModuleFile->isConcurrencyChecked())
M.setIsConcurrencyChecked();
if (loadedModuleFile->hasCxxInteroperability())
M.setHasCxxInteroperability();
if (!loadedModuleFile->getModulePackageName().empty()) {
M.setPackageName(Ctx.getIdentifier(loadedModuleFile->getModulePackageName()));
}
M.setUserModuleVersion(loadedModuleFile->getUserModuleVersion());
for (auto name: loadedModuleFile->getAllowableClientNames()) {
M.addAllowableClientName(Ctx.getIdentifier(name));
}
if (Ctx.LangOpts.BypassResilienceChecks)
M.setBypassResilience();
auto diagLocOrInvalid = diagLoc.value_or(SourceLoc());
loadInfo.status = loadedModuleFile->associateWithFileContext(
fileUnit, diagLocOrInvalid, Ctx.LangOpts.AllowModuleWithCompilerErrors);
// FIXME: This seems wrong. Overlay for system Clang module doesn't
// necessarily mean it's "system" module. User can make their own overlay
// in non-system directory.
// Remove this block after we fix the test suite.
if (auto shadowed = loadedModuleFile->getUnderlyingModule())
if (shadowed->isSystemModule())
M.setIsSystemModule(true);
if (loadInfo.status == serialization::Status::Valid ||
(Ctx.LangOpts.AllowModuleWithCompilerErrors &&
(loadInfo.status == serialization::Status::TargetTooNew ||
loadInfo.status == serialization::Status::TargetIncompatible))) {
if (loadedModuleFile->hasSourceInfoFile() &&
!loadedModuleFile->hasSourceInfo())
Ctx.Diags.diagnose(diagLocOrInvalid,
diag::serialization_malformed_sourceinfo,
moduleSourceInfoID);
Ctx.bumpGeneration();
LoadedModuleFiles.emplace_back(std::move(loadedModuleFile),
Ctx.getCurrentGeneration());
findOverlayFiles(diagLoc.value_or(SourceLoc()), &M, fileUnit);
} else {
fileUnit = nullptr;
}
}
if (loadInfo.status != serialization::Status::Valid) {
if (diagLoc)
serialization::diagnoseSerializedASTLoadFailure(
Ctx, *diagLoc, loadInfo, moduleBufferID, moduleDocBufferID,
loadedModuleFile.get(), M.getName());
// Even though the module failed to load, it's possible its contents
// include a source buffer that need to survive because it's already been
// used for diagnostics.
// Note this is only necessary in case a bridging header failed to load
// during the `associateWithFileContext()` call.
if (loadedModuleFile &&
loadedModuleFile->mayHaveDiagnosticsPointingAtBuffer())
OrphanedModuleFiles.push_back(std::move(loadedModuleFile));
} else {
// Report non-fatal compiler tag mismatch on stderr only to avoid
// polluting the IDE UI.
if (!loadInfo.problematicRevision.empty()) {
llvm::errs() << "remark: compiled module was created by a different " <<
"version of the compiler '" <<
loadInfo.problematicRevision <<
"': " << moduleBufferID << "\n";
}
}
// The -experimental-hermetic-seal-at-link flag turns on dead-stripping
// optimizations assuming library code can be optimized against client code.
// If the imported module was built with -experimental-hermetic-seal-at-link
// but the current module isn't, error out.
if (M.hasHermeticSealAtLink() && !Ctx.LangOpts.HermeticSealAtLink) {
Ctx.Diags.diagnose(diagLoc.value_or(SourceLoc()),
diag::need_hermetic_seal_to_import_module, M.getName());
}
if (M.isEmbeddedSwiftModule() &&
!Ctx.LangOpts.hasFeature(Feature::Embedded)) {
Ctx.Diags.diagnose(diagLoc.value_or(SourceLoc()),
diag::cannot_import_embedded_module, M.getName());
}
if (!M.isEmbeddedSwiftModule() &&
Ctx.LangOpts.hasFeature(Feature::Embedded)) {
Ctx.Diags.diagnose(diagLoc.value_or(SourceLoc()),
diag::cannot_import_non_embedded_module, M.getName());
}
// Non-resilient modules built with C++ interoperability enabled