1 //===-- ASTReader.cpp - AST File Reader -----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ASTReader class, which reads AST files.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Serialization/ASTReader.h"
15 #include "ASTCommon.h"
16 #include "ASTReaderInternals.h"
17 #include "clang/AST/ASTConsumer.h"
18 #include "clang/AST/ASTContext.h"
19 #include "clang/AST/ASTMutationListener.h"
20 #include "clang/AST/ASTUnresolvedSet.h"
21 #include "clang/AST/Decl.h"
22 #include "clang/AST/DeclCXX.h"
23 #include "clang/AST/DeclGroup.h"
24 #include "clang/AST/DeclObjC.h"
25 #include "clang/AST/DeclTemplate.h"
26 #include "clang/AST/Expr.h"
27 #include "clang/AST/ExprCXX.h"
28 #include "clang/AST/NestedNameSpecifier.h"
29 #include "clang/AST/ODRHash.h"
30 #include "clang/AST/RawCommentList.h"
31 #include "clang/AST/Type.h"
32 #include "clang/AST/TypeLocVisitor.h"
33 #include "clang/AST/UnresolvedSet.h"
34 #include "clang/Basic/CommentOptions.h"
35 #include "clang/Basic/DiagnosticOptions.h"
36 #include "clang/Basic/ExceptionSpecificationType.h"
37 #include "clang/Basic/FileManager.h"
38 #include "clang/Basic/FileSystemOptions.h"
39 #include "clang/Basic/LangOptions.h"
40 #include "clang/Basic/MemoryBufferCache.h"
41 #include "clang/Basic/ObjCRuntime.h"
42 #include "clang/Basic/OperatorKinds.h"
43 #include "clang/Basic/Sanitizers.h"
44 #include "clang/Basic/SourceManager.h"
45 #include "clang/Basic/SourceManagerInternals.h"
46 #include "clang/Basic/Specifiers.h"
47 #include "clang/Basic/TargetInfo.h"
48 #include "clang/Basic/TargetOptions.h"
49 #include "clang/Basic/TokenKinds.h"
50 #include "clang/Basic/Version.h"
51 #include "clang/Basic/VersionTuple.h"
52 #include "clang/Frontend/PCHContainerOperations.h"
53 #include "clang/Lex/HeaderSearch.h"
54 #include "clang/Lex/HeaderSearchOptions.h"
55 #include "clang/Lex/MacroInfo.h"
56 #include "clang/Lex/ModuleMap.h"
57 #include "clang/Lex/PreprocessingRecord.h"
58 #include "clang/Lex/Preprocessor.h"
59 #include "clang/Lex/PreprocessorOptions.h"
60 #include "clang/Sema/Scope.h"
61 #include "clang/Sema/Sema.h"
62 #include "clang/Sema/Weak.h"
63 #include "clang/Serialization/ASTDeserializationListener.h"
64 #include "clang/Serialization/GlobalModuleIndex.h"
65 #include "clang/Serialization/ModuleManager.h"
66 #include "clang/Serialization/SerializationDiagnostic.h"
67 #include "llvm/ADT/APFloat.h"
68 #include "llvm/ADT/APInt.h"
69 #include "llvm/ADT/APSInt.h"
70 #include "llvm/ADT/Hashing.h"
71 #include "llvm/ADT/SmallString.h"
72 #include "llvm/ADT/StringExtras.h"
73 #include "llvm/ADT/Triple.h"
74 #include "llvm/Bitcode/BitstreamReader.h"
75 #include "llvm/Support/Compression.h"
76 #include "llvm/Support/Compiler.h"
77 #include "llvm/Support/Error.h"
78 #include "llvm/Support/ErrorHandling.h"
79 #include "llvm/Support/FileSystem.h"
80 #include "llvm/Support/MemoryBuffer.h"
81 #include "llvm/Support/Path.h"
82 #include "llvm/Support/SaveAndRestore.h"
83 #include "llvm/Support/raw_ostream.h"
96 #include <system_error>
101 using namespace clang;
102 using namespace clang::serialization;
103 using namespace clang::serialization::reader;
104 using llvm::BitstreamCursor;
106 //===----------------------------------------------------------------------===//
107 // ChainedASTReaderListener implementation
108 //===----------------------------------------------------------------------===//
111 ChainedASTReaderListener::ReadFullVersionInformation(StringRef FullVersion) {
112 return First->ReadFullVersionInformation(FullVersion) ||
113 Second->ReadFullVersionInformation(FullVersion);
116 void ChainedASTReaderListener::ReadModuleName(StringRef ModuleName) {
117 First->ReadModuleName(ModuleName);
118 Second->ReadModuleName(ModuleName);
121 void ChainedASTReaderListener::ReadModuleMapFile(StringRef ModuleMapPath) {
122 First->ReadModuleMapFile(ModuleMapPath);
123 Second->ReadModuleMapFile(ModuleMapPath);
127 ChainedASTReaderListener::ReadLanguageOptions(const LangOptions &LangOpts,
129 bool AllowCompatibleDifferences) {
130 return First->ReadLanguageOptions(LangOpts, Complain,
131 AllowCompatibleDifferences) ||
132 Second->ReadLanguageOptions(LangOpts, Complain,
133 AllowCompatibleDifferences);
136 bool ChainedASTReaderListener::ReadTargetOptions(
137 const TargetOptions &TargetOpts, bool Complain,
138 bool AllowCompatibleDifferences) {
139 return First->ReadTargetOptions(TargetOpts, Complain,
140 AllowCompatibleDifferences) ||
141 Second->ReadTargetOptions(TargetOpts, Complain,
142 AllowCompatibleDifferences);
145 bool ChainedASTReaderListener::ReadDiagnosticOptions(
146 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
147 return First->ReadDiagnosticOptions(DiagOpts, Complain) ||
148 Second->ReadDiagnosticOptions(DiagOpts, Complain);
152 ChainedASTReaderListener::ReadFileSystemOptions(const FileSystemOptions &FSOpts,
154 return First->ReadFileSystemOptions(FSOpts, Complain) ||
155 Second->ReadFileSystemOptions(FSOpts, Complain);
158 bool ChainedASTReaderListener::ReadHeaderSearchOptions(
159 const HeaderSearchOptions &HSOpts, StringRef SpecificModuleCachePath,
161 return First->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
163 Second->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
167 bool ChainedASTReaderListener::ReadPreprocessorOptions(
168 const PreprocessorOptions &PPOpts, bool Complain,
169 std::string &SuggestedPredefines) {
170 return First->ReadPreprocessorOptions(PPOpts, Complain,
171 SuggestedPredefines) ||
172 Second->ReadPreprocessorOptions(PPOpts, Complain, SuggestedPredefines);
174 void ChainedASTReaderListener::ReadCounter(const serialization::ModuleFile &M,
176 First->ReadCounter(M, Value);
177 Second->ReadCounter(M, Value);
179 bool ChainedASTReaderListener::needsInputFileVisitation() {
180 return First->needsInputFileVisitation() ||
181 Second->needsInputFileVisitation();
183 bool ChainedASTReaderListener::needsSystemInputFileVisitation() {
184 return First->needsSystemInputFileVisitation() ||
185 Second->needsSystemInputFileVisitation();
187 void ChainedASTReaderListener::visitModuleFile(StringRef Filename,
189 First->visitModuleFile(Filename, Kind);
190 Second->visitModuleFile(Filename, Kind);
193 bool ChainedASTReaderListener::visitInputFile(StringRef Filename,
196 bool isExplicitModule) {
197 bool Continue = false;
198 if (First->needsInputFileVisitation() &&
199 (!isSystem || First->needsSystemInputFileVisitation()))
200 Continue |= First->visitInputFile(Filename, isSystem, isOverridden,
202 if (Second->needsInputFileVisitation() &&
203 (!isSystem || Second->needsSystemInputFileVisitation()))
204 Continue |= Second->visitInputFile(Filename, isSystem, isOverridden,
209 void ChainedASTReaderListener::readModuleFileExtension(
210 const ModuleFileExtensionMetadata &Metadata) {
211 First->readModuleFileExtension(Metadata);
212 Second->readModuleFileExtension(Metadata);
215 //===----------------------------------------------------------------------===//
216 // PCH validator implementation
217 //===----------------------------------------------------------------------===//
219 ASTReaderListener::~ASTReaderListener() {}
221 /// \brief Compare the given set of language options against an existing set of
222 /// language options.
224 /// \param Diags If non-NULL, diagnostics will be emitted via this engine.
225 /// \param AllowCompatibleDifferences If true, differences between compatible
226 /// language options will be permitted.
228 /// \returns true if the languagae options mis-match, false otherwise.
229 static bool checkLanguageOptions(const LangOptions &LangOpts,
230 const LangOptions &ExistingLangOpts,
231 DiagnosticsEngine *Diags,
232 bool AllowCompatibleDifferences = true) {
233 #define LANGOPT(Name, Bits, Default, Description) \
234 if (ExistingLangOpts.Name != LangOpts.Name) { \
236 Diags->Report(diag::err_pch_langopt_mismatch) \
237 << Description << LangOpts.Name << ExistingLangOpts.Name; \
241 #define VALUE_LANGOPT(Name, Bits, Default, Description) \
242 if (ExistingLangOpts.Name != LangOpts.Name) { \
244 Diags->Report(diag::err_pch_langopt_value_mismatch) \
249 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
250 if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) { \
252 Diags->Report(diag::err_pch_langopt_value_mismatch) \
257 #define COMPATIBLE_LANGOPT(Name, Bits, Default, Description) \
258 if (!AllowCompatibleDifferences) \
259 LANGOPT(Name, Bits, Default, Description)
261 #define COMPATIBLE_ENUM_LANGOPT(Name, Bits, Default, Description) \
262 if (!AllowCompatibleDifferences) \
263 ENUM_LANGOPT(Name, Bits, Default, Description)
265 #define COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description) \
266 if (!AllowCompatibleDifferences) \
267 VALUE_LANGOPT(Name, Bits, Default, Description)
269 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
270 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
271 #define BENIGN_VALUE_LANGOPT(Name, Type, Bits, Default, Description)
272 #include "clang/Basic/LangOptions.def"
274 if (ExistingLangOpts.ModuleFeatures != LangOpts.ModuleFeatures) {
276 Diags->Report(diag::err_pch_langopt_value_mismatch) << "module features";
280 if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) {
282 Diags->Report(diag::err_pch_langopt_value_mismatch)
283 << "target Objective-C runtime";
287 if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
288 LangOpts.CommentOpts.BlockCommandNames) {
290 Diags->Report(diag::err_pch_langopt_value_mismatch)
291 << "block command names";
298 /// \brief Compare the given set of target options against an existing set of
301 /// \param Diags If non-NULL, diagnostics will be emitted via this engine.
303 /// \returns true if the target options mis-match, false otherwise.
304 static bool checkTargetOptions(const TargetOptions &TargetOpts,
305 const TargetOptions &ExistingTargetOpts,
306 DiagnosticsEngine *Diags,
307 bool AllowCompatibleDifferences = true) {
308 #define CHECK_TARGET_OPT(Field, Name) \
309 if (TargetOpts.Field != ExistingTargetOpts.Field) { \
311 Diags->Report(diag::err_pch_targetopt_mismatch) \
312 << Name << TargetOpts.Field << ExistingTargetOpts.Field; \
316 // The triple and ABI must match exactly.
317 CHECK_TARGET_OPT(Triple, "target");
318 CHECK_TARGET_OPT(ABI, "target ABI");
320 // We can tolerate different CPUs in many cases, notably when one CPU
321 // supports a strict superset of another. When allowing compatible
322 // differences skip this check.
323 if (!AllowCompatibleDifferences)
324 CHECK_TARGET_OPT(CPU, "target CPU");
326 #undef CHECK_TARGET_OPT
328 // Compare feature sets.
329 SmallVector<StringRef, 4> ExistingFeatures(
330 ExistingTargetOpts.FeaturesAsWritten.begin(),
331 ExistingTargetOpts.FeaturesAsWritten.end());
332 SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(),
333 TargetOpts.FeaturesAsWritten.end());
334 std::sort(ExistingFeatures.begin(), ExistingFeatures.end());
335 std::sort(ReadFeatures.begin(), ReadFeatures.end());
337 // We compute the set difference in both directions explicitly so that we can
338 // diagnose the differences differently.
339 SmallVector<StringRef, 4> UnmatchedExistingFeatures, UnmatchedReadFeatures;
341 ExistingFeatures.begin(), ExistingFeatures.end(), ReadFeatures.begin(),
342 ReadFeatures.end(), std::back_inserter(UnmatchedExistingFeatures));
343 std::set_difference(ReadFeatures.begin(), ReadFeatures.end(),
344 ExistingFeatures.begin(), ExistingFeatures.end(),
345 std::back_inserter(UnmatchedReadFeatures));
347 // If we are allowing compatible differences and the read feature set is
348 // a strict subset of the existing feature set, there is nothing to diagnose.
349 if (AllowCompatibleDifferences && UnmatchedReadFeatures.empty())
353 for (StringRef Feature : UnmatchedReadFeatures)
354 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
355 << /* is-existing-feature */ false << Feature;
356 for (StringRef Feature : UnmatchedExistingFeatures)
357 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
358 << /* is-existing-feature */ true << Feature;
361 return !UnmatchedReadFeatures.empty() || !UnmatchedExistingFeatures.empty();
365 PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts,
367 bool AllowCompatibleDifferences) {
368 const LangOptions &ExistingLangOpts = PP.getLangOpts();
369 return checkLanguageOptions(LangOpts, ExistingLangOpts,
370 Complain ? &Reader.Diags : nullptr,
371 AllowCompatibleDifferences);
374 bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts,
376 bool AllowCompatibleDifferences) {
377 const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts();
378 return checkTargetOptions(TargetOpts, ExistingTargetOpts,
379 Complain ? &Reader.Diags : nullptr,
380 AllowCompatibleDifferences);
385 typedef llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/> >
387 typedef llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8> >
390 } // end anonymous namespace
392 static bool checkDiagnosticGroupMappings(DiagnosticsEngine &StoredDiags,
393 DiagnosticsEngine &Diags,
395 typedef DiagnosticsEngine::Level Level;
397 // Check current mappings for new -Werror mappings, and the stored mappings
398 // for cases that were explicitly mapped to *not* be errors that are now
399 // errors because of options like -Werror.
400 DiagnosticsEngine *MappingSources[] = { &Diags, &StoredDiags };
402 for (DiagnosticsEngine *MappingSource : MappingSources) {
403 for (auto DiagIDMappingPair : MappingSource->getDiagnosticMappings()) {
404 diag::kind DiagID = DiagIDMappingPair.first;
405 Level CurLevel = Diags.getDiagnosticLevel(DiagID, SourceLocation());
406 if (CurLevel < DiagnosticsEngine::Error)
407 continue; // not significant
409 StoredDiags.getDiagnosticLevel(DiagID, SourceLocation());
410 if (StoredLevel < DiagnosticsEngine::Error) {
412 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror=" +
413 Diags.getDiagnosticIDs()->getWarningOptionForDiag(DiagID).str();
422 static bool isExtHandlingFromDiagsError(DiagnosticsEngine &Diags) {
423 diag::Severity Ext = Diags.getExtensionHandlingBehavior();
424 if (Ext == diag::Severity::Warning && Diags.getWarningsAsErrors())
426 return Ext >= diag::Severity::Error;
429 static bool checkDiagnosticMappings(DiagnosticsEngine &StoredDiags,
430 DiagnosticsEngine &Diags,
431 bool IsSystem, bool Complain) {
434 if (Diags.getSuppressSystemWarnings())
436 // If -Wsystem-headers was not enabled before, be conservative
437 if (StoredDiags.getSuppressSystemWarnings()) {
439 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Wsystem-headers";
444 if (Diags.getWarningsAsErrors() && !StoredDiags.getWarningsAsErrors()) {
446 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror";
450 if (Diags.getWarningsAsErrors() && Diags.getEnableAllWarnings() &&
451 !StoredDiags.getEnableAllWarnings()) {
453 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Weverything -Werror";
457 if (isExtHandlingFromDiagsError(Diags) &&
458 !isExtHandlingFromDiagsError(StoredDiags)) {
460 Diags.Report(diag::err_pch_diagopt_mismatch) << "-pedantic-errors";
464 return checkDiagnosticGroupMappings(StoredDiags, Diags, Complain);
467 /// Return the top import module if it is implicit, nullptr otherwise.
468 static Module *getTopImportImplicitModule(ModuleManager &ModuleMgr,
470 // If the original import came from a file explicitly generated by the user,
471 // don't check the diagnostic mappings.
472 // FIXME: currently this is approximated by checking whether this is not a
473 // module import of an implicitly-loaded module file.
474 // Note: ModuleMgr.rbegin() may not be the current module, but it must be in
475 // the transitive closure of its imports, since unrelated modules cannot be
476 // imported until after this module finishes validation.
477 ModuleFile *TopImport = &*ModuleMgr.rbegin();
478 while (!TopImport->ImportedBy.empty())
479 TopImport = TopImport->ImportedBy[0];
480 if (TopImport->Kind != MK_ImplicitModule)
483 StringRef ModuleName = TopImport->ModuleName;
484 assert(!ModuleName.empty() && "diagnostic options read before module name");
486 Module *M = PP.getHeaderSearchInfo().lookupModule(ModuleName);
487 assert(M && "missing module");
491 bool PCHValidator::ReadDiagnosticOptions(
492 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
493 DiagnosticsEngine &ExistingDiags = PP.getDiagnostics();
494 IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(ExistingDiags.getDiagnosticIDs());
495 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
496 new DiagnosticsEngine(DiagIDs, DiagOpts.get()));
497 // This should never fail, because we would have processed these options
498 // before writing them to an ASTFile.
499 ProcessWarningOptions(*Diags, *DiagOpts, /*Report*/false);
501 ModuleManager &ModuleMgr = Reader.getModuleManager();
502 assert(ModuleMgr.size() >= 1 && "what ASTFile is this then");
504 Module *TopM = getTopImportImplicitModule(ModuleMgr, PP);
508 // FIXME: if the diagnostics are incompatible, save a DiagnosticOptions that
509 // contains the union of their flags.
510 return checkDiagnosticMappings(*Diags, ExistingDiags, TopM->IsSystem,
514 /// \brief Collect the macro definitions provided by the given preprocessor
517 collectMacroDefinitions(const PreprocessorOptions &PPOpts,
518 MacroDefinitionsMap &Macros,
519 SmallVectorImpl<StringRef> *MacroNames = nullptr) {
520 for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
521 StringRef Macro = PPOpts.Macros[I].first;
522 bool IsUndef = PPOpts.Macros[I].second;
524 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
525 StringRef MacroName = MacroPair.first;
526 StringRef MacroBody = MacroPair.second;
528 // For an #undef'd macro, we only care about the name.
530 if (MacroNames && !Macros.count(MacroName))
531 MacroNames->push_back(MacroName);
533 Macros[MacroName] = std::make_pair("", true);
537 // For a #define'd macro, figure out the actual definition.
538 if (MacroName.size() == Macro.size())
541 // Note: GCC drops anything following an end-of-line character.
542 StringRef::size_type End = MacroBody.find_first_of("\n\r");
543 MacroBody = MacroBody.substr(0, End);
546 if (MacroNames && !Macros.count(MacroName))
547 MacroNames->push_back(MacroName);
548 Macros[MacroName] = std::make_pair(MacroBody, false);
552 /// \brief Check the preprocessor options deserialized from the control block
553 /// against the preprocessor options in an existing preprocessor.
555 /// \param Diags If non-null, produce diagnostics for any mismatches incurred.
556 /// \param Validate If true, validate preprocessor options. If false, allow
557 /// macros defined by \p ExistingPPOpts to override those defined by
558 /// \p PPOpts in SuggestedPredefines.
559 static bool checkPreprocessorOptions(const PreprocessorOptions &PPOpts,
560 const PreprocessorOptions &ExistingPPOpts,
561 DiagnosticsEngine *Diags,
562 FileManager &FileMgr,
563 std::string &SuggestedPredefines,
564 const LangOptions &LangOpts,
565 bool Validate = true) {
566 // Check macro definitions.
567 MacroDefinitionsMap ASTFileMacros;
568 collectMacroDefinitions(PPOpts, ASTFileMacros);
569 MacroDefinitionsMap ExistingMacros;
570 SmallVector<StringRef, 4> ExistingMacroNames;
571 collectMacroDefinitions(ExistingPPOpts, ExistingMacros, &ExistingMacroNames);
573 for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) {
574 // Dig out the macro definition in the existing preprocessor options.
575 StringRef MacroName = ExistingMacroNames[I];
576 std::pair<StringRef, bool> Existing = ExistingMacros[MacroName];
578 // Check whether we know anything about this macro name or not.
579 llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/> >::iterator Known
580 = ASTFileMacros.find(MacroName);
581 if (!Validate || Known == ASTFileMacros.end()) {
582 // FIXME: Check whether this identifier was referenced anywhere in the
583 // AST file. If so, we should reject the AST file. Unfortunately, this
584 // information isn't in the control block. What shall we do about it?
586 if (Existing.second) {
587 SuggestedPredefines += "#undef ";
588 SuggestedPredefines += MacroName.str();
589 SuggestedPredefines += '\n';
591 SuggestedPredefines += "#define ";
592 SuggestedPredefines += MacroName.str();
593 SuggestedPredefines += ' ';
594 SuggestedPredefines += Existing.first.str();
595 SuggestedPredefines += '\n';
600 // If the macro was defined in one but undef'd in the other, we have a
602 if (Existing.second != Known->second.second) {
604 Diags->Report(diag::err_pch_macro_def_undef)
605 << MacroName << Known->second.second;
610 // If the macro was #undef'd in both, or if the macro bodies are identical,
612 if (Existing.second || Existing.first == Known->second.first)
615 // The macro bodies differ; complain.
617 Diags->Report(diag::err_pch_macro_def_conflict)
618 << MacroName << Known->second.first << Existing.first;
623 // Check whether we're using predefines.
624 if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines && Validate) {
626 Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines;
631 // Detailed record is important since it is used for the module cache hash.
632 if (LangOpts.Modules &&
633 PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord && Validate) {
635 Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord;
640 // Compute the #include and #include_macros lines we need.
641 for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) {
642 StringRef File = ExistingPPOpts.Includes[I];
643 if (File == ExistingPPOpts.ImplicitPCHInclude)
646 if (std::find(PPOpts.Includes.begin(), PPOpts.Includes.end(), File)
647 != PPOpts.Includes.end())
650 SuggestedPredefines += "#include \"";
651 SuggestedPredefines += File;
652 SuggestedPredefines += "\"\n";
655 for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) {
656 StringRef File = ExistingPPOpts.MacroIncludes[I];
657 if (std::find(PPOpts.MacroIncludes.begin(), PPOpts.MacroIncludes.end(),
659 != PPOpts.MacroIncludes.end())
662 SuggestedPredefines += "#__include_macros \"";
663 SuggestedPredefines += File;
664 SuggestedPredefines += "\"\n##\n";
670 bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
672 std::string &SuggestedPredefines) {
673 const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts();
675 return checkPreprocessorOptions(PPOpts, ExistingPPOpts,
676 Complain? &Reader.Diags : nullptr,
682 bool SimpleASTReaderListener::ReadPreprocessorOptions(
683 const PreprocessorOptions &PPOpts,
685 std::string &SuggestedPredefines) {
686 return checkPreprocessorOptions(PPOpts,
687 PP.getPreprocessorOpts(),
695 /// Check the header search options deserialized from the control block
696 /// against the header search options in an existing preprocessor.
698 /// \param Diags If non-null, produce diagnostics for any mismatches incurred.
699 static bool checkHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
700 StringRef SpecificModuleCachePath,
701 StringRef ExistingModuleCachePath,
702 DiagnosticsEngine *Diags,
703 const LangOptions &LangOpts) {
704 if (LangOpts.Modules) {
705 if (SpecificModuleCachePath != ExistingModuleCachePath) {
707 Diags->Report(diag::err_pch_modulecache_mismatch)
708 << SpecificModuleCachePath << ExistingModuleCachePath;
716 bool PCHValidator::ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
717 StringRef SpecificModuleCachePath,
719 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
720 PP.getHeaderSearchInfo().getModuleCachePath(),
721 Complain ? &Reader.Diags : nullptr,
725 void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) {
726 PP.setCounterValue(Value);
729 //===----------------------------------------------------------------------===//
730 // AST reader implementation
731 //===----------------------------------------------------------------------===//
733 void ASTReader::setDeserializationListener(ASTDeserializationListener *Listener,
734 bool TakeOwnership) {
735 DeserializationListener = Listener;
736 OwnsDeserializationListener = TakeOwnership;
739 unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) {
740 return serialization::ComputeHash(Sel);
743 std::pair<unsigned, unsigned>
744 ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
745 using namespace llvm::support;
746 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
747 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
748 return std::make_pair(KeyLen, DataLen);
751 ASTSelectorLookupTrait::internal_key_type
752 ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) {
753 using namespace llvm::support;
754 SelectorTable &SelTable = Reader.getContext().Selectors;
755 unsigned N = endian::readNext<uint16_t, little, unaligned>(d);
756 IdentifierInfo *FirstII = Reader.getLocalIdentifier(
757 F, endian::readNext<uint32_t, little, unaligned>(d));
759 return SelTable.getNullarySelector(FirstII);
761 return SelTable.getUnarySelector(FirstII);
763 SmallVector<IdentifierInfo *, 16> Args;
764 Args.push_back(FirstII);
765 for (unsigned I = 1; I != N; ++I)
766 Args.push_back(Reader.getLocalIdentifier(
767 F, endian::readNext<uint32_t, little, unaligned>(d)));
769 return SelTable.getSelector(N, Args.data());
772 ASTSelectorLookupTrait::data_type
773 ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d,
775 using namespace llvm::support;
779 Result.ID = Reader.getGlobalSelectorID(
780 F, endian::readNext<uint32_t, little, unaligned>(d));
781 unsigned FullInstanceBits = endian::readNext<uint16_t, little, unaligned>(d);
782 unsigned FullFactoryBits = endian::readNext<uint16_t, little, unaligned>(d);
783 Result.InstanceBits = FullInstanceBits & 0x3;
784 Result.InstanceHasMoreThanOneDecl = (FullInstanceBits >> 2) & 0x1;
785 Result.FactoryBits = FullFactoryBits & 0x3;
786 Result.FactoryHasMoreThanOneDecl = (FullFactoryBits >> 2) & 0x1;
787 unsigned NumInstanceMethods = FullInstanceBits >> 3;
788 unsigned NumFactoryMethods = FullFactoryBits >> 3;
790 // Load instance methods
791 for (unsigned I = 0; I != NumInstanceMethods; ++I) {
792 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
793 F, endian::readNext<uint32_t, little, unaligned>(d)))
794 Result.Instance.push_back(Method);
797 // Load factory methods
798 for (unsigned I = 0; I != NumFactoryMethods; ++I) {
799 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
800 F, endian::readNext<uint32_t, little, unaligned>(d)))
801 Result.Factory.push_back(Method);
807 unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) {
808 return llvm::HashString(a);
811 std::pair<unsigned, unsigned>
812 ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) {
813 using namespace llvm::support;
814 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
815 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
816 return std::make_pair(KeyLen, DataLen);
819 ASTIdentifierLookupTraitBase::internal_key_type
820 ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) {
821 assert(n >= 2 && d[n-1] == '\0');
822 return StringRef((const char*) d, n-1);
825 /// \brief Whether the given identifier is "interesting".
826 static bool isInterestingIdentifier(ASTReader &Reader, IdentifierInfo &II,
828 return II.hadMacroDefinition() ||
830 (IsModule ? II.hasRevertedBuiltin() : II.getObjCOrBuiltinID()) ||
831 II.hasRevertedTokenIDToIdentifier() ||
832 (!(IsModule && Reader.getContext().getLangOpts().CPlusPlus) &&
833 II.getFETokenInfo<void>());
836 static bool readBit(unsigned &Bits) {
837 bool Value = Bits & 0x1;
842 IdentID ASTIdentifierLookupTrait::ReadIdentifierID(const unsigned char *d) {
843 using namespace llvm::support;
844 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
845 return Reader.getGlobalIdentifierID(F, RawID >> 1);
848 static void markIdentifierFromAST(ASTReader &Reader, IdentifierInfo &II) {
849 if (!II.isFromAST()) {
851 bool IsModule = Reader.getPreprocessor().getCurrentModule() != nullptr;
852 if (isInterestingIdentifier(Reader, II, IsModule))
853 II.setChangedSinceDeserialization();
857 IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
858 const unsigned char* d,
860 using namespace llvm::support;
861 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
862 bool IsInteresting = RawID & 0x01;
864 // Wipe out the "is interesting" bit.
867 // Build the IdentifierInfo and link the identifier ID with it.
868 IdentifierInfo *II = KnownII;
870 II = &Reader.getIdentifierTable().getOwn(k);
873 markIdentifierFromAST(Reader, *II);
874 Reader.markIdentifierUpToDate(II);
876 IdentID ID = Reader.getGlobalIdentifierID(F, RawID);
877 if (!IsInteresting) {
878 // For uninteresting identifiers, there's nothing else to do. Just notify
879 // the reader that we've finished loading this identifier.
880 Reader.SetIdentifierInfo(ID, II);
884 unsigned ObjCOrBuiltinID = endian::readNext<uint16_t, little, unaligned>(d);
885 unsigned Bits = endian::readNext<uint16_t, little, unaligned>(d);
886 bool CPlusPlusOperatorKeyword = readBit(Bits);
887 bool HasRevertedTokenIDToIdentifier = readBit(Bits);
888 bool HasRevertedBuiltin = readBit(Bits);
889 bool Poisoned = readBit(Bits);
890 bool ExtensionToken = readBit(Bits);
891 bool HadMacroDefinition = readBit(Bits);
893 assert(Bits == 0 && "Extra bits in the identifier?");
896 // Set or check the various bits in the IdentifierInfo structure.
897 // Token IDs are read-only.
898 if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
899 II->revertTokenIDToIdentifier();
901 II->setObjCOrBuiltinID(ObjCOrBuiltinID);
902 else if (HasRevertedBuiltin && II->getBuiltinID()) {
904 assert((II->hasRevertedBuiltin() ||
905 II->getObjCOrBuiltinID() == ObjCOrBuiltinID) &&
906 "Incorrect ObjC keyword or builtin ID");
908 assert(II->isExtensionToken() == ExtensionToken &&
909 "Incorrect extension token flag");
910 (void)ExtensionToken;
912 II->setIsPoisoned(true);
913 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&
914 "Incorrect C++ operator keyword flag");
915 (void)CPlusPlusOperatorKeyword;
917 // If this identifier is a macro, deserialize the macro
919 if (HadMacroDefinition) {
920 uint32_t MacroDirectivesOffset =
921 endian::readNext<uint32_t, little, unaligned>(d);
924 Reader.addPendingMacro(II, &F, MacroDirectivesOffset);
927 Reader.SetIdentifierInfo(ID, II);
929 // Read all of the declarations visible at global scope with this
932 SmallVector<uint32_t, 4> DeclIDs;
933 for (; DataLen > 0; DataLen -= 4)
934 DeclIDs.push_back(Reader.getGlobalDeclID(
935 F, endian::readNext<uint32_t, little, unaligned>(d)));
936 Reader.SetGloballyVisibleDecls(II, DeclIDs);
942 DeclarationNameKey::DeclarationNameKey(DeclarationName Name)
943 : Kind(Name.getNameKind()) {
945 case DeclarationName::Identifier:
946 Data = (uint64_t)Name.getAsIdentifierInfo();
948 case DeclarationName::ObjCZeroArgSelector:
949 case DeclarationName::ObjCOneArgSelector:
950 case DeclarationName::ObjCMultiArgSelector:
951 Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr();
953 case DeclarationName::CXXOperatorName:
954 Data = Name.getCXXOverloadedOperator();
956 case DeclarationName::CXXLiteralOperatorName:
957 Data = (uint64_t)Name.getCXXLiteralIdentifier();
959 case DeclarationName::CXXDeductionGuideName:
960 Data = (uint64_t)Name.getCXXDeductionGuideTemplate()
961 ->getDeclName().getAsIdentifierInfo();
963 case DeclarationName::CXXConstructorName:
964 case DeclarationName::CXXDestructorName:
965 case DeclarationName::CXXConversionFunctionName:
966 case DeclarationName::CXXUsingDirective:
972 unsigned DeclarationNameKey::getHash() const {
973 llvm::FoldingSetNodeID ID;
977 case DeclarationName::Identifier:
978 case DeclarationName::CXXLiteralOperatorName:
979 case DeclarationName::CXXDeductionGuideName:
980 ID.AddString(((IdentifierInfo*)Data)->getName());
982 case DeclarationName::ObjCZeroArgSelector:
983 case DeclarationName::ObjCOneArgSelector:
984 case DeclarationName::ObjCMultiArgSelector:
985 ID.AddInteger(serialization::ComputeHash(Selector(Data)));
987 case DeclarationName::CXXOperatorName:
988 ID.AddInteger((OverloadedOperatorKind)Data);
990 case DeclarationName::CXXConstructorName:
991 case DeclarationName::CXXDestructorName:
992 case DeclarationName::CXXConversionFunctionName:
993 case DeclarationName::CXXUsingDirective:
997 return ID.ComputeHash();
1001 ASTDeclContextNameLookupTrait::ReadFileRef(const unsigned char *&d) {
1002 using namespace llvm::support;
1003 uint32_t ModuleFileID = endian::readNext<uint32_t, little, unaligned>(d);
1004 return Reader.getLocalModuleFile(F, ModuleFileID);
1007 std::pair<unsigned, unsigned>
1008 ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char *&d) {
1009 using namespace llvm::support;
1010 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
1011 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
1012 return std::make_pair(KeyLen, DataLen);
1015 ASTDeclContextNameLookupTrait::internal_key_type
1016 ASTDeclContextNameLookupTrait::ReadKey(const unsigned char *d, unsigned) {
1017 using namespace llvm::support;
1019 auto Kind = (DeclarationName::NameKind)*d++;
1022 case DeclarationName::Identifier:
1023 case DeclarationName::CXXLiteralOperatorName:
1024 case DeclarationName::CXXDeductionGuideName:
1025 Data = (uint64_t)Reader.getLocalIdentifier(
1026 F, endian::readNext<uint32_t, little, unaligned>(d));
1028 case DeclarationName::ObjCZeroArgSelector:
1029 case DeclarationName::ObjCOneArgSelector:
1030 case DeclarationName::ObjCMultiArgSelector:
1032 (uint64_t)Reader.getLocalSelector(
1033 F, endian::readNext<uint32_t, little, unaligned>(
1034 d)).getAsOpaquePtr();
1036 case DeclarationName::CXXOperatorName:
1037 Data = *d++; // OverloadedOperatorKind
1039 case DeclarationName::CXXConstructorName:
1040 case DeclarationName::CXXDestructorName:
1041 case DeclarationName::CXXConversionFunctionName:
1042 case DeclarationName::CXXUsingDirective:
1047 return DeclarationNameKey(Kind, Data);
1050 void ASTDeclContextNameLookupTrait::ReadDataInto(internal_key_type,
1051 const unsigned char *d,
1053 data_type_builder &Val) {
1054 using namespace llvm::support;
1055 for (unsigned NumDecls = DataLen / 4; NumDecls; --NumDecls) {
1056 uint32_t LocalID = endian::readNext<uint32_t, little, unaligned>(d);
1057 Val.insert(Reader.getGlobalDeclID(F, LocalID));
1061 bool ASTReader::ReadLexicalDeclContextStorage(ModuleFile &M,
1062 BitstreamCursor &Cursor,
1065 assert(Offset != 0);
1067 SavedStreamPosition SavedPosition(Cursor);
1068 Cursor.JumpToBit(Offset);
1072 unsigned Code = Cursor.ReadCode();
1073 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
1074 if (RecCode != DECL_CONTEXT_LEXICAL) {
1075 Error("Expected lexical block");
1079 assert(!isa<TranslationUnitDecl>(DC) &&
1080 "expected a TU_UPDATE_LEXICAL record for TU");
1081 // If we are handling a C++ class template instantiation, we can see multiple
1082 // lexical updates for the same record. It's important that we select only one
1083 // of them, so that field numbering works properly. Just pick the first one we
1085 auto &Lex = LexicalDecls[DC];
1087 Lex = std::make_pair(
1088 &M, llvm::makeArrayRef(
1089 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
1093 DC->setHasExternalLexicalStorage(true);
1097 bool ASTReader::ReadVisibleDeclContextStorage(ModuleFile &M,
1098 BitstreamCursor &Cursor,
1101 assert(Offset != 0);
1103 SavedStreamPosition SavedPosition(Cursor);
1104 Cursor.JumpToBit(Offset);
1108 unsigned Code = Cursor.ReadCode();
1109 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
1110 if (RecCode != DECL_CONTEXT_VISIBLE) {
1111 Error("Expected visible lookup table block");
1115 // We can't safely determine the primary context yet, so delay attaching the
1116 // lookup table until we're done with recursive deserialization.
1117 auto *Data = (const unsigned char*)Blob.data();
1118 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&M, Data});
1122 void ASTReader::Error(StringRef Msg) const {
1123 Error(diag::err_fe_pch_malformed, Msg);
1124 if (Context.getLangOpts().Modules && !Diags.isDiagnosticInFlight() &&
1125 !PP.getHeaderSearchInfo().getModuleCachePath().empty()) {
1126 Diag(diag::note_module_cache_path)
1127 << PP.getHeaderSearchInfo().getModuleCachePath();
1131 void ASTReader::Error(unsigned DiagID,
1132 StringRef Arg1, StringRef Arg2) const {
1133 if (Diags.isDiagnosticInFlight())
1134 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2);
1136 Diag(DiagID) << Arg1 << Arg2;
1139 //===----------------------------------------------------------------------===//
1140 // Source Manager Deserialization
1141 //===----------------------------------------------------------------------===//
1143 /// \brief Read the line table in the source manager block.
1144 /// \returns true if there was an error.
1145 bool ASTReader::ParseLineTable(ModuleFile &F,
1146 const RecordData &Record) {
1148 LineTableInfo &LineTable = SourceMgr.getLineTable();
1150 // Parse the file names
1151 std::map<int, int> FileIDs;
1152 for (unsigned I = 0; Record[Idx]; ++I) {
1153 // Extract the file name
1154 auto Filename = ReadPath(F, Record, Idx);
1155 FileIDs[I] = LineTable.getLineTableFilenameID(Filename);
1159 // Parse the line entries
1160 std::vector<LineEntry> Entries;
1161 while (Idx < Record.size()) {
1162 int FID = Record[Idx++];
1163 assert(FID >= 0 && "Serialized line entries for non-local file.");
1164 // Remap FileID from 1-based old view.
1165 FID += F.SLocEntryBaseID - 1;
1167 // Extract the line entries
1168 unsigned NumEntries = Record[Idx++];
1169 assert(NumEntries && "no line entries for file ID");
1171 Entries.reserve(NumEntries);
1172 for (unsigned I = 0; I != NumEntries; ++I) {
1173 unsigned FileOffset = Record[Idx++];
1174 unsigned LineNo = Record[Idx++];
1175 int FilenameID = FileIDs[Record[Idx++]];
1176 SrcMgr::CharacteristicKind FileKind
1177 = (SrcMgr::CharacteristicKind)Record[Idx++];
1178 unsigned IncludeOffset = Record[Idx++];
1179 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
1180 FileKind, IncludeOffset));
1182 LineTable.AddEntry(FileID::get(FID), Entries);
1188 /// \brief Read a source manager block
1189 bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
1190 using namespace SrcMgr;
1192 BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
1194 // Set the source-location entry cursor to the current position in
1195 // the stream. This cursor will be used to read the contents of the
1196 // source manager block initially, and then lazily read
1197 // source-location entries as needed.
1198 SLocEntryCursor = F.Stream;
1200 // The stream itself is going to skip over the source manager block.
1201 if (F.Stream.SkipBlock()) {
1202 Error("malformed block record in AST file");
1206 // Enter the source manager block.
1207 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) {
1208 Error("malformed source manager block record in AST file");
1214 llvm::BitstreamEntry E = SLocEntryCursor.advanceSkippingSubblocks();
1217 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1218 case llvm::BitstreamEntry::Error:
1219 Error("malformed block record in AST file");
1221 case llvm::BitstreamEntry::EndBlock:
1223 case llvm::BitstreamEntry::Record:
1224 // The interesting case.
1231 switch (SLocEntryCursor.readRecord(E.ID, Record, &Blob)) {
1232 default: // Default behavior: ignore.
1235 case SM_SLOC_FILE_ENTRY:
1236 case SM_SLOC_BUFFER_ENTRY:
1237 case SM_SLOC_EXPANSION_ENTRY:
1238 // Once we hit one of the source location entries, we're done.
1244 /// \brief If a header file is not found at the path that we expect it to be
1245 /// and the PCH file was moved from its original location, try to resolve the
1246 /// file by assuming that header+PCH were moved together and the header is in
1247 /// the same place relative to the PCH.
1249 resolveFileRelativeToOriginalDir(const std::string &Filename,
1250 const std::string &OriginalDir,
1251 const std::string &CurrDir) {
1252 assert(OriginalDir != CurrDir &&
1253 "No point trying to resolve the file if the PCH dir didn't change");
1254 using namespace llvm::sys;
1255 SmallString<128> filePath(Filename);
1256 fs::make_absolute(filePath);
1257 assert(path::is_absolute(OriginalDir));
1258 SmallString<128> currPCHPath(CurrDir);
1260 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)),
1261 fileDirE = path::end(path::parent_path(filePath));
1262 path::const_iterator origDirI = path::begin(OriginalDir),
1263 origDirE = path::end(OriginalDir);
1264 // Skip the common path components from filePath and OriginalDir.
1265 while (fileDirI != fileDirE && origDirI != origDirE &&
1266 *fileDirI == *origDirI) {
1270 for (; origDirI != origDirE; ++origDirI)
1271 path::append(currPCHPath, "..");
1272 path::append(currPCHPath, fileDirI, fileDirE);
1273 path::append(currPCHPath, path::filename(Filename));
1274 return currPCHPath.str();
1277 bool ASTReader::ReadSLocEntry(int ID) {
1281 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1282 Error("source location entry ID out-of-range for AST file");
1286 // Local helper to read the (possibly-compressed) buffer data following the
1288 auto ReadBuffer = [this](
1289 BitstreamCursor &SLocEntryCursor,
1290 StringRef Name) -> std::unique_ptr<llvm::MemoryBuffer> {
1293 unsigned Code = SLocEntryCursor.ReadCode();
1294 unsigned RecCode = SLocEntryCursor.readRecord(Code, Record, &Blob);
1296 if (RecCode == SM_SLOC_BUFFER_BLOB_COMPRESSED) {
1297 if (!llvm::zlib::isAvailable()) {
1298 Error("zlib is not available");
1301 SmallString<0> Uncompressed;
1303 llvm::zlib::uncompress(Blob, Uncompressed, Record[0])) {
1304 Error("could not decompress embedded file contents: " +
1305 llvm::toString(std::move(E)));
1308 return llvm::MemoryBuffer::getMemBufferCopy(Uncompressed, Name);
1309 } else if (RecCode == SM_SLOC_BUFFER_BLOB) {
1310 return llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name, true);
1312 Error("AST record has invalid code");
1317 ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second;
1318 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]);
1319 BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
1320 unsigned BaseOffset = F->SLocEntryBaseOffset;
1322 ++NumSLocEntriesRead;
1323 llvm::BitstreamEntry Entry = SLocEntryCursor.advance();
1324 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1325 Error("incorrectly-formatted source location entry in AST file");
1331 switch (SLocEntryCursor.readRecord(Entry.ID, Record, &Blob)) {
1333 Error("incorrectly-formatted source location entry in AST file");
1336 case SM_SLOC_FILE_ENTRY: {
1337 // We will detect whether a file changed and return 'Failure' for it, but
1338 // we will also try to fail gracefully by setting up the SLocEntry.
1339 unsigned InputID = Record[4];
1340 InputFile IF = getInputFile(*F, InputID);
1341 const FileEntry *File = IF.getFile();
1342 bool OverriddenBuffer = IF.isOverridden();
1344 // Note that we only check if a File was returned. If it was out-of-date
1345 // we have complained but we will continue creating a FileID to recover
1350 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1351 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
1352 // This is the module's main file.
1353 IncludeLoc = getImportLocation(F);
1355 SrcMgr::CharacteristicKind
1356 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1357 FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter,
1358 ID, BaseOffset + Record[0]);
1359 SrcMgr::FileInfo &FileInfo =
1360 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
1361 FileInfo.NumCreatedFIDs = Record[5];
1363 FileInfo.setHasLineDirectives();
1365 const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
1366 unsigned NumFileDecls = Record[7];
1368 assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?");
1369 FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl,
1373 const SrcMgr::ContentCache *ContentCache
1374 = SourceMgr.getOrCreateContentCache(File,
1375 /*isSystemFile=*/FileCharacter != SrcMgr::C_User);
1376 if (OverriddenBuffer && !ContentCache->BufferOverridden &&
1377 ContentCache->ContentsEntry == ContentCache->OrigEntry &&
1378 !ContentCache->getRawBuffer()) {
1379 auto Buffer = ReadBuffer(SLocEntryCursor, File->getName());
1382 SourceMgr.overrideFileContents(File, std::move(Buffer));
1388 case SM_SLOC_BUFFER_ENTRY: {
1389 const char *Name = Blob.data();
1390 unsigned Offset = Record[0];
1391 SrcMgr::CharacteristicKind
1392 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1393 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1394 if (IncludeLoc.isInvalid() && F->isModule()) {
1395 IncludeLoc = getImportLocation(F);
1398 auto Buffer = ReadBuffer(SLocEntryCursor, Name);
1401 SourceMgr.createFileID(std::move(Buffer), FileCharacter, ID,
1402 BaseOffset + Offset, IncludeLoc);
1406 case SM_SLOC_EXPANSION_ENTRY: {
1407 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]);
1408 SourceMgr.createExpansionLoc(SpellingLoc,
1409 ReadSourceLocation(*F, Record[2]),
1410 ReadSourceLocation(*F, Record[3]),
1413 BaseOffset + Record[0]);
1421 std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
1423 return std::make_pair(SourceLocation(), "");
1425 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1426 Error("source location entry ID out-of-range for AST file");
1427 return std::make_pair(SourceLocation(), "");
1430 // Find which module file this entry lands in.
1431 ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second;
1433 return std::make_pair(SourceLocation(), "");
1435 // FIXME: Can we map this down to a particular submodule? That would be
1437 return std::make_pair(M->ImportLoc, StringRef(M->ModuleName));
1440 /// \brief Find the location where the module F is imported.
1441 SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
1442 if (F->ImportLoc.isValid())
1443 return F->ImportLoc;
1445 // Otherwise we have a PCH. It's considered to be "imported" at the first
1446 // location of its includer.
1447 if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
1448 // Main file is the importer.
1449 assert(SourceMgr.getMainFileID().isValid() && "missing main file");
1450 return SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
1452 return F->ImportedBy[0]->FirstLoc;
1455 /// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
1456 /// specified cursor. Read the abbreviations that are at the top of the block
1457 /// and then leave the cursor pointing into the block.
1458 bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) {
1459 if (Cursor.EnterSubBlock(BlockID))
1463 uint64_t Offset = Cursor.GetCurrentBitNo();
1464 unsigned Code = Cursor.ReadCode();
1466 // We expect all abbrevs to be at the start of the block.
1467 if (Code != llvm::bitc::DEFINE_ABBREV) {
1468 Cursor.JumpToBit(Offset);
1471 Cursor.ReadAbbrevRecord();
1475 Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record,
1479 Tok.setLocation(ReadSourceLocation(F, Record, Idx));
1480 Tok.setLength(Record[Idx++]);
1481 if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++]))
1482 Tok.setIdentifierInfo(II);
1483 Tok.setKind((tok::TokenKind)Record[Idx++]);
1484 Tok.setFlag((Token::TokenFlags)Record[Idx++]);
1488 MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
1489 BitstreamCursor &Stream = F.MacroCursor;
1491 // Keep track of where we are in the stream, then jump back there
1492 // after reading this macro.
1493 SavedStreamPosition SavedPosition(Stream);
1495 Stream.JumpToBit(Offset);
1497 SmallVector<IdentifierInfo*, 16> MacroArgs;
1498 MacroInfo *Macro = nullptr;
1501 // Advance to the next record, but if we get to the end of the block, don't
1502 // pop it (removing all the abbreviations from the cursor) since we want to
1503 // be able to reseek within the block and read entries.
1504 unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
1505 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(Flags);
1507 switch (Entry.Kind) {
1508 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1509 case llvm::BitstreamEntry::Error:
1510 Error("malformed block record in AST file");
1512 case llvm::BitstreamEntry::EndBlock:
1514 case llvm::BitstreamEntry::Record:
1515 // The interesting case.
1521 PreprocessorRecordTypes RecType =
1522 (PreprocessorRecordTypes)Stream.readRecord(Entry.ID, Record);
1524 case PP_MODULE_MACRO:
1525 case PP_MACRO_DIRECTIVE_HISTORY:
1528 case PP_MACRO_OBJECT_LIKE:
1529 case PP_MACRO_FUNCTION_LIKE: {
1530 // If we already have a macro, that means that we've hit the end
1531 // of the definition of the macro we were looking for. We're
1536 unsigned NextIndex = 1; // Skip identifier ID.
1537 SubmoduleID SubModID = getGlobalSubmoduleID(F, Record[NextIndex++]);
1538 SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex);
1539 MacroInfo *MI = PP.AllocateDeserializedMacroInfo(Loc, SubModID);
1540 MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex));
1541 MI->setIsUsed(Record[NextIndex++]);
1542 MI->setUsedForHeaderGuard(Record[NextIndex++]);
1544 if (RecType == PP_MACRO_FUNCTION_LIKE) {
1545 // Decode function-like macro info.
1546 bool isC99VarArgs = Record[NextIndex++];
1547 bool isGNUVarArgs = Record[NextIndex++];
1548 bool hasCommaPasting = Record[NextIndex++];
1550 unsigned NumArgs = Record[NextIndex++];
1551 for (unsigned i = 0; i != NumArgs; ++i)
1552 MacroArgs.push_back(getLocalIdentifier(F, Record[NextIndex++]));
1554 // Install function-like macro info.
1555 MI->setIsFunctionLike();
1556 if (isC99VarArgs) MI->setIsC99Varargs();
1557 if (isGNUVarArgs) MI->setIsGNUVarargs();
1558 if (hasCommaPasting) MI->setHasCommaPasting();
1559 MI->setArgumentList(MacroArgs, PP.getPreprocessorAllocator());
1562 // Remember that we saw this macro last so that we add the tokens that
1563 // form its body to it.
1566 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
1567 Record[NextIndex]) {
1568 // We have a macro definition. Register the association
1569 PreprocessedEntityID
1570 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]);
1571 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
1572 PreprocessingRecord::PPEntityID PPID =
1573 PPRec.getPPEntityID(GlobalID - 1, /*isLoaded=*/true);
1574 MacroDefinitionRecord *PPDef = cast_or_null<MacroDefinitionRecord>(
1575 PPRec.getPreprocessedEntity(PPID));
1577 PPRec.RegisterMacroDefinition(Macro, PPDef);
1585 // If we see a TOKEN before a PP_MACRO_*, then the file is
1586 // erroneous, just pretend we didn't see this.
1590 Token Tok = ReadToken(F, Record, Idx);
1591 Macro->AddTokenToBody(Tok);
1598 PreprocessedEntityID
1599 ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M,
1600 unsigned LocalID) const {
1601 if (!M.ModuleOffsetMap.empty())
1602 ReadModuleOffsetMap(M);
1604 ContinuousRangeMap<uint32_t, int, 2>::const_iterator
1605 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS);
1606 assert(I != M.PreprocessedEntityRemap.end()
1607 && "Invalid index into preprocessed entity index remap");
1609 return LocalID + I->second;
1612 unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
1613 return llvm::hash_combine(ikey.Size, ikey.ModTime);
1616 HeaderFileInfoTrait::internal_key_type
1617 HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) {
1618 internal_key_type ikey = {FE->getSize(),
1619 M.HasTimestamps ? FE->getModificationTime() : 0,
1620 FE->getName(), /*Imported*/ false};
1624 bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
1625 if (a.Size != b.Size || (a.ModTime && b.ModTime && a.ModTime != b.ModTime))
1628 if (llvm::sys::path::is_absolute(a.Filename) && a.Filename == b.Filename)
1631 // Determine whether the actual files are equivalent.
1632 FileManager &FileMgr = Reader.getFileManager();
1633 auto GetFile = [&](const internal_key_type &Key) -> const FileEntry* {
1635 return FileMgr.getFile(Key.Filename);
1637 std::string Resolved = Key.Filename;
1638 Reader.ResolveImportedPath(M, Resolved);
1639 return FileMgr.getFile(Resolved);
1642 const FileEntry *FEA = GetFile(a);
1643 const FileEntry *FEB = GetFile(b);
1644 return FEA && FEA == FEB;
1647 std::pair<unsigned, unsigned>
1648 HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
1649 using namespace llvm::support;
1650 unsigned KeyLen = (unsigned) endian::readNext<uint16_t, little, unaligned>(d);
1651 unsigned DataLen = (unsigned) *d++;
1652 return std::make_pair(KeyLen, DataLen);
1655 HeaderFileInfoTrait::internal_key_type
1656 HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
1657 using namespace llvm::support;
1658 internal_key_type ikey;
1659 ikey.Size = off_t(endian::readNext<uint64_t, little, unaligned>(d));
1660 ikey.ModTime = time_t(endian::readNext<uint64_t, little, unaligned>(d));
1661 ikey.Filename = (const char *)d;
1662 ikey.Imported = true;
1666 HeaderFileInfoTrait::data_type
1667 HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
1669 const unsigned char *End = d + DataLen;
1670 using namespace llvm::support;
1672 unsigned Flags = *d++;
1673 // FIXME: Refactor with mergeHeaderFileInfo in HeaderSearch.cpp.
1674 HFI.isImport |= (Flags >> 4) & 0x01;
1675 HFI.isPragmaOnce |= (Flags >> 3) & 0x01;
1676 HFI.DirInfo = (Flags >> 1) & 0x03;
1677 HFI.IndexHeaderMapHeader = Flags & 0x01;
1678 // FIXME: Find a better way to handle this. Maybe just store a
1679 // "has been included" flag?
1680 HFI.NumIncludes = std::max(endian::readNext<uint16_t, little, unaligned>(d),
1682 HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
1683 M, endian::readNext<uint32_t, little, unaligned>(d));
1684 if (unsigned FrameworkOffset =
1685 endian::readNext<uint32_t, little, unaligned>(d)) {
1686 // The framework offset is 1 greater than the actual offset,
1687 // since 0 is used as an indicator for "no framework name".
1688 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
1689 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName);
1692 assert((End - d) % 4 == 0 &&
1693 "Wrong data length in HeaderFileInfo deserialization");
1695 uint32_t LocalSMID = endian::readNext<uint32_t, little, unaligned>(d);
1696 auto HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>(LocalSMID & 3);
1699 // This header is part of a module. Associate it with the module to enable
1700 // implicit module import.
1701 SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID);
1702 Module *Mod = Reader.getSubmodule(GlobalSMID);
1703 FileManager &FileMgr = Reader.getFileManager();
1705 Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1707 std::string Filename = key.Filename;
1709 Reader.ResolveImportedPath(M, Filename);
1710 // FIXME: This is not always the right filename-as-written, but we're not
1711 // going to use this information to rebuild the module, so it doesn't make
1712 // a lot of difference.
1713 Module::Header H = { key.Filename, FileMgr.getFile(Filename) };
1714 ModMap.addHeader(Mod, H, HeaderRole, /*Imported*/true);
1715 HFI.isModuleHeader |= !(HeaderRole & ModuleMap::TextualHeader);
1718 // This HeaderFileInfo was externally loaded.
1719 HFI.External = true;
1724 void ASTReader::addPendingMacro(IdentifierInfo *II,
1726 uint64_t MacroDirectivesOffset) {
1727 assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard");
1728 PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset));
1731 void ASTReader::ReadDefinedMacros() {
1732 // Note that we are loading defined macros.
1733 Deserializing Macros(this);
1735 for (ModuleFile &I : llvm::reverse(ModuleMgr)) {
1736 BitstreamCursor &MacroCursor = I.MacroCursor;
1738 // If there was no preprocessor block, skip this file.
1739 if (MacroCursor.getBitcodeBytes().empty())
1742 BitstreamCursor Cursor = MacroCursor;
1743 Cursor.JumpToBit(I.MacroStartOffset);
1747 llvm::BitstreamEntry E = Cursor.advanceSkippingSubblocks();
1750 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1751 case llvm::BitstreamEntry::Error:
1752 Error("malformed block record in AST file");
1754 case llvm::BitstreamEntry::EndBlock:
1757 case llvm::BitstreamEntry::Record:
1759 switch (Cursor.readRecord(E.ID, Record)) {
1760 default: // Default behavior: ignore.
1763 case PP_MACRO_OBJECT_LIKE:
1764 case PP_MACRO_FUNCTION_LIKE: {
1765 IdentifierInfo *II = getLocalIdentifier(I, Record[0]);
1766 if (II->isOutOfDate())
1767 updateOutOfDateIdentifier(*II);
1784 /// \brief Visitor class used to look up identifirs in an AST file.
1785 class IdentifierLookupVisitor {
1788 unsigned PriorGeneration;
1789 unsigned &NumIdentifierLookups;
1790 unsigned &NumIdentifierLookupHits;
1791 IdentifierInfo *Found;
1794 IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
1795 unsigned &NumIdentifierLookups,
1796 unsigned &NumIdentifierLookupHits)
1797 : Name(Name), NameHash(ASTIdentifierLookupTrait::ComputeHash(Name)),
1798 PriorGeneration(PriorGeneration),
1799 NumIdentifierLookups(NumIdentifierLookups),
1800 NumIdentifierLookupHits(NumIdentifierLookupHits),
1805 bool operator()(ModuleFile &M) {
1806 // If we've already searched this module file, skip it now.
1807 if (M.Generation <= PriorGeneration)
1810 ASTIdentifierLookupTable *IdTable
1811 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
1815 ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), M,
1817 ++NumIdentifierLookups;
1818 ASTIdentifierLookupTable::iterator Pos =
1819 IdTable->find_hashed(Name, NameHash, &Trait);
1820 if (Pos == IdTable->end())
1823 // Dereferencing the iterator has the effect of building the
1824 // IdentifierInfo node and populating it with the various
1825 // declarations it needs.
1826 ++NumIdentifierLookupHits;
1831 // \brief Retrieve the identifier info found within the module
1833 IdentifierInfo *getIdentifierInfo() const { return Found; }
1836 } // end anonymous namespace
1838 void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
1839 // Note that we are loading an identifier.
1840 Deserializing AnIdentifier(this);
1842 unsigned PriorGeneration = 0;
1843 if (getContext().getLangOpts().Modules)
1844 PriorGeneration = IdentifierGeneration[&II];
1846 // If there is a global index, look there first to determine which modules
1847 // provably do not have any results for this identifier.
1848 GlobalModuleIndex::HitSet Hits;
1849 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
1850 if (!loadGlobalIndex()) {
1851 if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
1856 IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
1857 NumIdentifierLookups,
1858 NumIdentifierLookupHits);
1859 ModuleMgr.visit(Visitor, HitsPtr);
1860 markIdentifierUpToDate(&II);
1863 void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
1867 II->setOutOfDate(false);
1869 // Update the generation for this identifier.
1870 if (getContext().getLangOpts().Modules)
1871 IdentifierGeneration[II] = getGeneration();
1874 void ASTReader::resolvePendingMacro(IdentifierInfo *II,
1875 const PendingMacroInfo &PMInfo) {
1876 ModuleFile &M = *PMInfo.M;
1878 BitstreamCursor &Cursor = M.MacroCursor;
1879 SavedStreamPosition SavedPosition(Cursor);
1880 Cursor.JumpToBit(PMInfo.MacroDirectivesOffset);
1882 struct ModuleMacroRecord {
1883 SubmoduleID SubModID;
1885 SmallVector<SubmoduleID, 8> Overrides;
1887 llvm::SmallVector<ModuleMacroRecord, 8> ModuleMacros;
1889 // We expect to see a sequence of PP_MODULE_MACRO records listing exported
1890 // macros, followed by a PP_MACRO_DIRECTIVE_HISTORY record with the complete
1894 llvm::BitstreamEntry Entry =
1895 Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
1896 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1897 Error("malformed block record in AST file");
1902 switch ((PreprocessorRecordTypes)Cursor.readRecord(Entry.ID, Record)) {
1903 case PP_MACRO_DIRECTIVE_HISTORY:
1906 case PP_MODULE_MACRO: {
1907 ModuleMacros.push_back(ModuleMacroRecord());
1908 auto &Info = ModuleMacros.back();
1909 Info.SubModID = getGlobalSubmoduleID(M, Record[0]);
1910 Info.MI = getMacro(getGlobalMacroID(M, Record[1]));
1911 for (int I = 2, N = Record.size(); I != N; ++I)
1912 Info.Overrides.push_back(getGlobalSubmoduleID(M, Record[I]));
1917 Error("malformed block record in AST file");
1921 // We found the macro directive history; that's the last record
1926 // Module macros are listed in reverse dependency order.
1928 std::reverse(ModuleMacros.begin(), ModuleMacros.end());
1929 llvm::SmallVector<ModuleMacro*, 8> Overrides;
1930 for (auto &MMR : ModuleMacros) {
1932 for (unsigned ModID : MMR.Overrides) {
1933 Module *Mod = getSubmodule(ModID);
1934 auto *Macro = PP.getModuleMacro(Mod, II);
1935 assert(Macro && "missing definition for overridden macro");
1936 Overrides.push_back(Macro);
1939 bool Inserted = false;
1940 Module *Owner = getSubmodule(MMR.SubModID);
1941 PP.addModuleMacro(Owner, II, MMR.MI, Overrides, Inserted);
1945 // Don't read the directive history for a module; we don't have anywhere
1950 // Deserialize the macro directives history in reverse source-order.
1951 MacroDirective *Latest = nullptr, *Earliest = nullptr;
1952 unsigned Idx = 0, N = Record.size();
1954 MacroDirective *MD = nullptr;
1955 SourceLocation Loc = ReadSourceLocation(M, Record, Idx);
1956 MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
1958 case MacroDirective::MD_Define: {
1959 MacroInfo *MI = getMacro(getGlobalMacroID(M, Record[Idx++]));
1960 MD = PP.AllocateDefMacroDirective(MI, Loc);
1963 case MacroDirective::MD_Undefine: {
1964 MD = PP.AllocateUndefMacroDirective(Loc);
1967 case MacroDirective::MD_Visibility:
1968 bool isPublic = Record[Idx++];
1969 MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
1976 Earliest->setPrevious(MD);
1981 PP.setLoadedMacroDirective(II, Earliest, Latest);
1984 ASTReader::InputFileInfo
1985 ASTReader::readInputFileInfo(ModuleFile &F, unsigned ID) {
1986 // Go find this input file.
1987 BitstreamCursor &Cursor = F.InputFilesCursor;
1988 SavedStreamPosition SavedPosition(Cursor);
1989 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
1991 unsigned Code = Cursor.ReadCode();
1995 unsigned Result = Cursor.readRecord(Code, Record, &Blob);
1996 assert(static_cast<InputFileRecordTypes>(Result) == INPUT_FILE &&
1997 "invalid record type for input file");
2000 assert(Record[0] == ID && "Bogus stored ID or offset");
2002 R.StoredSize = static_cast<off_t>(Record[1]);
2003 R.StoredTime = static_cast<time_t>(Record[2]);
2004 R.Overridden = static_cast<bool>(Record[3]);
2005 R.Transient = static_cast<bool>(Record[4]);
2007 ResolveImportedPath(F, R.Filename);
2011 static unsigned moduleKindForDiagnostic(ModuleKind Kind);
2012 InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
2013 // If this ID is bogus, just return an empty input file.
2014 if (ID == 0 || ID > F.InputFilesLoaded.size())
2017 // If we've already loaded this input file, return it.
2018 if (F.InputFilesLoaded[ID-1].getFile())
2019 return F.InputFilesLoaded[ID-1];
2021 if (F.InputFilesLoaded[ID-1].isNotFound())
2024 // Go find this input file.
2025 BitstreamCursor &Cursor = F.InputFilesCursor;
2026 SavedStreamPosition SavedPosition(Cursor);
2027 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2029 InputFileInfo FI = readInputFileInfo(F, ID);
2030 off_t StoredSize = FI.StoredSize;
2031 time_t StoredTime = FI.StoredTime;
2032 bool Overridden = FI.Overridden;
2033 bool Transient = FI.Transient;
2034 StringRef Filename = FI.Filename;
2036 const FileEntry *File = FileMgr.getFile(Filename, /*OpenFile=*/false);
2038 // If we didn't find the file, resolve it relative to the
2039 // original directory from which this AST file was created.
2040 if (File == nullptr && !F.OriginalDir.empty() && !CurrentDir.empty() &&
2041 F.OriginalDir != CurrentDir) {
2042 std::string Resolved = resolveFileRelativeToOriginalDir(Filename,
2045 if (!Resolved.empty())
2046 File = FileMgr.getFile(Resolved);
2049 // For an overridden file, create a virtual file with the stored
2051 if ((Overridden || Transient) && File == nullptr)
2052 File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime);
2054 if (File == nullptr) {
2056 std::string ErrorStr = "could not find file '";
2057 ErrorStr += Filename;
2058 ErrorStr += "' referenced by AST file '";
2059 ErrorStr += F.FileName;
2063 // Record that we didn't find the file.
2064 F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
2068 // Check if there was a request to override the contents of the file
2069 // that was part of the precompiled header. Overridding such a file
2070 // can lead to problems when lexing using the source locations from the
2072 SourceManager &SM = getSourceManager();
2073 // FIXME: Reject if the overrides are different.
2074 if ((!Overridden && !Transient) && SM.isFileOverridden(File)) {
2076 Error(diag::err_fe_pch_file_overridden, Filename);
2077 // After emitting the diagnostic, recover by disabling the override so
2078 // that the original file will be used.
2080 // FIXME: This recovery is just as broken as the original state; there may
2081 // be another precompiled module that's using the overridden contents, or
2082 // we might be half way through parsing it. Instead, we should treat the
2083 // overridden contents as belonging to a separate FileEntry.
2084 SM.disableFileContentsOverride(File);
2085 // The FileEntry is a virtual file entry with the size of the contents
2086 // that would override the original contents. Set it to the original's
2088 FileMgr.modifyFileEntry(const_cast<FileEntry*>(File),
2089 StoredSize, StoredTime);
2092 bool IsOutOfDate = false;
2094 // For an overridden file, there is nothing to validate.
2095 if (!Overridden && //
2096 (StoredSize != File->getSize() ||
2097 (StoredTime && StoredTime != File->getModificationTime() &&
2101 // Build a list of the PCH imports that got us here (in reverse).
2102 SmallVector<ModuleFile *, 4> ImportStack(1, &F);
2103 while (ImportStack.back()->ImportedBy.size() > 0)
2104 ImportStack.push_back(ImportStack.back()->ImportedBy[0]);
2106 // The top-level PCH is stale.
2107 StringRef TopLevelPCHName(ImportStack.back()->FileName);
2108 unsigned DiagnosticKind = moduleKindForDiagnostic(ImportStack.back()->Kind);
2109 if (DiagnosticKind == 0)
2110 Error(diag::err_fe_pch_file_modified, Filename, TopLevelPCHName);
2111 else if (DiagnosticKind == 1)
2112 Error(diag::err_fe_module_file_modified, Filename, TopLevelPCHName);
2114 Error(diag::err_fe_ast_file_modified, Filename, TopLevelPCHName);
2116 // Print the import stack.
2117 if (ImportStack.size() > 1 && !Diags.isDiagnosticInFlight()) {
2118 Diag(diag::note_pch_required_by)
2119 << Filename << ImportStack[0]->FileName;
2120 for (unsigned I = 1; I < ImportStack.size(); ++I)
2121 Diag(diag::note_pch_required_by)
2122 << ImportStack[I-1]->FileName << ImportStack[I]->FileName;
2125 if (!Diags.isDiagnosticInFlight())
2126 Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
2131 // FIXME: If the file is overridden and we've already opened it,
2132 // issue an error (or split it into a separate FileEntry).
2134 InputFile IF = InputFile(File, Overridden || Transient, IsOutOfDate);
2136 // Note that we've loaded this input file.
2137 F.InputFilesLoaded[ID-1] = IF;
2141 /// \brief If we are loading a relocatable PCH or module file, and the filename
2142 /// is not an absolute path, add the system or module root to the beginning of
2144 void ASTReader::ResolveImportedPath(ModuleFile &M, std::string &Filename) {
2145 // Resolve relative to the base directory, if we have one.
2146 if (!M.BaseDirectory.empty())
2147 return ResolveImportedPath(Filename, M.BaseDirectory);
2150 void ASTReader::ResolveImportedPath(std::string &Filename, StringRef Prefix) {
2151 if (Filename.empty() || llvm::sys::path::is_absolute(Filename))
2154 SmallString<128> Buffer;
2155 llvm::sys::path::append(Buffer, Prefix, Filename);
2156 Filename.assign(Buffer.begin(), Buffer.end());
2159 static bool isDiagnosedResult(ASTReader::ASTReadResult ARR, unsigned Caps) {
2161 case ASTReader::Failure: return true;
2162 case ASTReader::Missing: return !(Caps & ASTReader::ARR_Missing);
2163 case ASTReader::OutOfDate: return !(Caps & ASTReader::ARR_OutOfDate);
2164 case ASTReader::VersionMismatch: return !(Caps & ASTReader::ARR_VersionMismatch);
2165 case ASTReader::ConfigurationMismatch:
2166 return !(Caps & ASTReader::ARR_ConfigurationMismatch);
2167 case ASTReader::HadErrors: return true;
2168 case ASTReader::Success: return false;
2171 llvm_unreachable("unknown ASTReadResult");
2174 ASTReader::ASTReadResult ASTReader::ReadOptionsBlock(
2175 BitstreamCursor &Stream, unsigned ClientLoadCapabilities,
2176 bool AllowCompatibleConfigurationMismatch, ASTReaderListener &Listener,
2177 std::string &SuggestedPredefines) {
2178 if (Stream.EnterSubBlock(OPTIONS_BLOCK_ID))
2181 // Read all of the records in the options block.
2183 ASTReadResult Result = Success;
2185 llvm::BitstreamEntry Entry = Stream.advance();
2187 switch (Entry.Kind) {
2188 case llvm::BitstreamEntry::Error:
2189 case llvm::BitstreamEntry::SubBlock:
2192 case llvm::BitstreamEntry::EndBlock:
2195 case llvm::BitstreamEntry::Record:
2196 // The interesting case.
2200 // Read and process a record.
2202 switch ((OptionsRecordTypes)Stream.readRecord(Entry.ID, Record)) {
2203 case LANGUAGE_OPTIONS: {
2204 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2205 if (ParseLanguageOptions(Record, Complain, Listener,
2206 AllowCompatibleConfigurationMismatch))
2207 Result = ConfigurationMismatch;
2211 case TARGET_OPTIONS: {
2212 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2213 if (ParseTargetOptions(Record, Complain, Listener,
2214 AllowCompatibleConfigurationMismatch))
2215 Result = ConfigurationMismatch;
2219 case FILE_SYSTEM_OPTIONS: {
2220 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2221 if (!AllowCompatibleConfigurationMismatch &&
2222 ParseFileSystemOptions(Record, Complain, Listener))
2223 Result = ConfigurationMismatch;
2227 case HEADER_SEARCH_OPTIONS: {
2228 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2229 if (!AllowCompatibleConfigurationMismatch &&
2230 ParseHeaderSearchOptions(Record, Complain, Listener))
2231 Result = ConfigurationMismatch;
2235 case PREPROCESSOR_OPTIONS:
2236 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2237 if (!AllowCompatibleConfigurationMismatch &&
2238 ParsePreprocessorOptions(Record, Complain, Listener,
2239 SuggestedPredefines))
2240 Result = ConfigurationMismatch;
2246 ASTReader::ASTReadResult
2247 ASTReader::ReadControlBlock(ModuleFile &F,
2248 SmallVectorImpl<ImportedModule> &Loaded,
2249 const ModuleFile *ImportedBy,
2250 unsigned ClientLoadCapabilities) {
2251 BitstreamCursor &Stream = F.Stream;
2252 ASTReadResult Result = Success;
2254 if (Stream.EnterSubBlock(CONTROL_BLOCK_ID)) {
2255 Error("malformed block record in AST file");
2259 // Lambda to read the unhashed control block the first time it's called.
2261 // For PCM files, the unhashed control block cannot be read until after the
2262 // MODULE_NAME record. However, PCH files have no MODULE_NAME, and yet still
2263 // need to look ahead before reading the IMPORTS record. For consistency,
2264 // this block is always read somehow (see BitstreamEntry::EndBlock).
2265 bool HasReadUnhashedControlBlock = false;
2266 auto readUnhashedControlBlockOnce = [&]() {
2267 if (!HasReadUnhashedControlBlock) {
2268 HasReadUnhashedControlBlock = true;
2269 if (ASTReadResult Result =
2270 readUnhashedControlBlock(F, ImportedBy, ClientLoadCapabilities))
2276 // Read all of the records and blocks in the control block.
2278 unsigned NumInputs = 0;
2279 unsigned NumUserInputs = 0;
2281 llvm::BitstreamEntry Entry = Stream.advance();
2283 switch (Entry.Kind) {
2284 case llvm::BitstreamEntry::Error:
2285 Error("malformed block record in AST file");
2287 case llvm::BitstreamEntry::EndBlock: {
2288 // Validate the module before returning. This call catches an AST with
2289 // no module name and no imports.
2290 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2293 // Validate input files.
2294 const HeaderSearchOptions &HSOpts =
2295 PP.getHeaderSearchInfo().getHeaderSearchOpts();
2297 // All user input files reside at the index range [0, NumUserInputs), and
2298 // system input files reside at [NumUserInputs, NumInputs). For explicitly
2299 // loaded module files, ignore missing inputs.
2300 if (!DisableValidation && F.Kind != MK_ExplicitModule &&
2301 F.Kind != MK_PrebuiltModule) {
2302 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2304 // If we are reading a module, we will create a verification timestamp,
2305 // so we verify all input files. Otherwise, verify only user input
2308 unsigned N = NumUserInputs;
2309 if (ValidateSystemInputs ||
2310 (HSOpts.ModulesValidateOncePerBuildSession &&
2311 F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp &&
2312 F.Kind == MK_ImplicitModule))
2315 for (unsigned I = 0; I < N; ++I) {
2316 InputFile IF = getInputFile(F, I+1, Complain);
2317 if (!IF.getFile() || IF.isOutOfDate())
2323 Listener->visitModuleFile(F.FileName, F.Kind);
2325 if (Listener && Listener->needsInputFileVisitation()) {
2326 unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2328 for (unsigned I = 0; I < N; ++I) {
2329 bool IsSystem = I >= NumUserInputs;
2330 InputFileInfo FI = readInputFileInfo(F, I+1);
2331 Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden,
2332 F.Kind == MK_ExplicitModule ||
2333 F.Kind == MK_PrebuiltModule);
2340 case llvm::BitstreamEntry::SubBlock:
2342 case INPUT_FILES_BLOCK_ID:
2343 F.InputFilesCursor = Stream;
2344 if (Stream.SkipBlock() || // Skip with the main cursor
2345 // Read the abbreviations
2346 ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
2347 Error("malformed block record in AST file");
2352 case OPTIONS_BLOCK_ID:
2353 // If we're reading the first module for this group, check its options
2354 // are compatible with ours. For modules it imports, no further checking
2355 // is required, because we checked them when we built it.
2356 if (Listener && !ImportedBy) {
2357 // Should we allow the configuration of the module file to differ from
2358 // the configuration of the current translation unit in a compatible
2361 // FIXME: Allow this for files explicitly specified with -include-pch.
2362 bool AllowCompatibleConfigurationMismatch =
2363 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
2365 Result = ReadOptionsBlock(Stream, ClientLoadCapabilities,
2366 AllowCompatibleConfigurationMismatch,
2367 *Listener, SuggestedPredefines);
2368 if (Result == Failure) {
2369 Error("malformed block record in AST file");
2373 if (DisableValidation ||
2374 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
2377 // If we can't load the module, exit early since we likely
2378 // will rebuild the module anyway. The stream may be in the
2379 // middle of a block.
2380 if (Result != Success)
2382 } else if (Stream.SkipBlock()) {
2383 Error("malformed block record in AST file");
2389 if (Stream.SkipBlock()) {
2390 Error("malformed block record in AST file");
2396 case llvm::BitstreamEntry::Record:
2397 // The interesting case.
2401 // Read and process a record.
2404 switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2406 if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2407 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2408 Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2409 : diag::err_pch_version_too_new);
2410 return VersionMismatch;
2413 bool hasErrors = Record[6];
2414 if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
2415 Diag(diag::err_pch_with_compiler_errors);
2419 Diags.ErrorOccurred = true;
2420 Diags.UncompilableErrorOccurred = true;
2421 Diags.UnrecoverableErrorOccurred = true;
2424 F.RelocatablePCH = Record[4];
2425 // Relative paths in a relocatable PCH are relative to our sysroot.
2426 if (F.RelocatablePCH)
2427 F.BaseDirectory = isysroot.empty() ? "/" : isysroot;
2429 F.HasTimestamps = Record[5];
2431 const std::string &CurBranch = getClangFullRepositoryVersion();
2432 StringRef ASTBranch = Blob;
2433 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
2434 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2435 Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
2436 return VersionMismatch;
2442 // Validate the AST before processing any imports (otherwise, untangling
2443 // them can be error-prone and expensive). A module will have a name and
2444 // will already have been validated, but this catches the PCH case.
2445 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2448 // Load each of the imported PCH files.
2449 unsigned Idx = 0, N = Record.size();
2451 // Read information about the AST file.
2452 ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
2453 // The import location will be the local one for now; we will adjust
2454 // all import locations of module imports after the global source
2455 // location info are setup, in ReadAST.
2456 SourceLocation ImportLoc =
2457 ReadUntranslatedSourceLocation(Record[Idx++]);
2458 off_t StoredSize = (off_t)Record[Idx++];
2459 time_t StoredModTime = (time_t)Record[Idx++];
2460 ASTFileSignature StoredSignature = {
2461 {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2462 (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2463 (uint32_t)Record[Idx++]}}};
2464 auto ImportedFile = ReadPath(F, Record, Idx);
2466 // If our client can't cope with us being out of date, we can't cope with
2467 // our dependency being missing.
2468 unsigned Capabilities = ClientLoadCapabilities;
2469 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2470 Capabilities &= ~ARR_Missing;
2472 // Load the AST file.
2473 auto Result = ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F,
2474 Loaded, StoredSize, StoredModTime,
2475 StoredSignature, Capabilities);
2477 // If we diagnosed a problem, produce a backtrace.
2478 if (isDiagnosedResult(Result, Capabilities))
2479 Diag(diag::note_module_file_imported_by)
2480 << F.FileName << !F.ModuleName.empty() << F.ModuleName;
2483 case Failure: return Failure;
2484 // If we have to ignore the dependency, we'll have to ignore this too.
2486 case OutOfDate: return OutOfDate;
2487 case VersionMismatch: return VersionMismatch;
2488 case ConfigurationMismatch: return ConfigurationMismatch;
2489 case HadErrors: return HadErrors;
2490 case Success: break;
2497 F.OriginalSourceFileID = FileID::get(Record[0]);
2498 F.ActualOriginalSourceFileName = Blob;
2499 F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
2500 ResolveImportedPath(F, F.OriginalSourceFileName);
2503 case ORIGINAL_FILE_ID:
2504 F.OriginalSourceFileID = FileID::get(Record[0]);
2507 case ORIGINAL_PCH_DIR:
2508 F.OriginalDir = Blob;
2512 F.ModuleName = Blob;
2514 Listener->ReadModuleName(F.ModuleName);
2516 // Validate the AST as soon as we have a name so we can exit early on
2518 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2523 case MODULE_DIRECTORY: {
2524 assert(!F.ModuleName.empty() &&
2525 "MODULE_DIRECTORY found before MODULE_NAME");
2526 // If we've already loaded a module map file covering this module, we may
2527 // have a better path for it (relative to the current build).
2528 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
2529 if (M && M->Directory) {
2530 // If we're implicitly loading a module, the base directory can't
2531 // change between the build and use.
2532 if (F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
2533 const DirectoryEntry *BuildDir =
2534 PP.getFileManager().getDirectory(Blob);
2535 if (!BuildDir || BuildDir != M->Directory) {
2536 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2537 Diag(diag::err_imported_module_relocated)
2538 << F.ModuleName << Blob << M->Directory->getName();
2542 F.BaseDirectory = M->Directory->getName();
2544 F.BaseDirectory = Blob;
2549 case MODULE_MAP_FILE:
2550 if (ASTReadResult Result =
2551 ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
2555 case INPUT_FILE_OFFSETS:
2556 NumInputs = Record[0];
2557 NumUserInputs = Record[1];
2558 F.InputFileOffsets =
2559 (const llvm::support::unaligned_uint64_t *)Blob.data();
2560 F.InputFilesLoaded.resize(NumInputs);
2561 F.NumUserInputFiles = NumUserInputs;
2567 ASTReader::ASTReadResult
2568 ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
2569 BitstreamCursor &Stream = F.Stream;
2571 if (Stream.EnterSubBlock(AST_BLOCK_ID)) {
2572 Error("malformed block record in AST file");
2576 // Read all of the records and blocks for the AST file.
2579 llvm::BitstreamEntry Entry = Stream.advance();
2581 switch (Entry.Kind) {
2582 case llvm::BitstreamEntry::Error:
2583 Error("error at end of module block in AST file");
2585 case llvm::BitstreamEntry::EndBlock: {
2586 // Outside of C++, we do not store a lookup map for the translation unit.
2587 // Instead, mark it as needing a lookup map to be built if this module
2588 // contains any declarations lexically within it (which it always does!).
2589 // This usually has no cost, since we very rarely need the lookup map for
2590 // the translation unit outside C++.
2591 DeclContext *DC = Context.getTranslationUnitDecl();
2592 if (DC->hasExternalLexicalStorage() &&
2593 !getContext().getLangOpts().CPlusPlus)
2594 DC->setMustBuildLookupTable();
2598 case llvm::BitstreamEntry::SubBlock:
2600 case DECLTYPES_BLOCK_ID:
2601 // We lazily load the decls block, but we want to set up the
2602 // DeclsCursor cursor to point into it. Clone our current bitcode
2603 // cursor to it, enter the block and read the abbrevs in that block.
2604 // With the main cursor, we just skip over it.
2605 F.DeclsCursor = Stream;
2606 if (Stream.SkipBlock() || // Skip with the main cursor.
2607 // Read the abbrevs.
2608 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
2609 Error("malformed block record in AST file");
2614 case PREPROCESSOR_BLOCK_ID:
2615 F.MacroCursor = Stream;
2616 if (!PP.getExternalSource())
2617 PP.setExternalSource(this);
2619 if (Stream.SkipBlock() ||
2620 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
2621 Error("malformed block record in AST file");
2624 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
2627 case PREPROCESSOR_DETAIL_BLOCK_ID:
2628 F.PreprocessorDetailCursor = Stream;
2629 if (Stream.SkipBlock() ||
2630 ReadBlockAbbrevs(F.PreprocessorDetailCursor,
2631 PREPROCESSOR_DETAIL_BLOCK_ID)) {
2632 Error("malformed preprocessor detail record in AST file");
2635 F.PreprocessorDetailStartOffset
2636 = F.PreprocessorDetailCursor.GetCurrentBitNo();
2638 if (!PP.getPreprocessingRecord())
2639 PP.createPreprocessingRecord();
2640 if (!PP.getPreprocessingRecord()->getExternalSource())
2641 PP.getPreprocessingRecord()->SetExternalSource(*this);
2644 case SOURCE_MANAGER_BLOCK_ID:
2645 if (ReadSourceManagerBlock(F))
2649 case SUBMODULE_BLOCK_ID:
2650 if (ASTReadResult Result =
2651 ReadSubmoduleBlock(F, ClientLoadCapabilities))
2655 case COMMENTS_BLOCK_ID: {
2656 BitstreamCursor C = Stream;
2657 if (Stream.SkipBlock() ||
2658 ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
2659 Error("malformed comments block in AST file");
2662 CommentsCursors.push_back(std::make_pair(C, &F));
2667 if (Stream.SkipBlock()) {
2668 Error("malformed block record in AST file");
2675 case llvm::BitstreamEntry::Record:
2676 // The interesting case.
2680 // Read and process a record.
2683 switch ((ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2684 default: // Default behavior: ignore.
2688 if (F.LocalNumTypes != 0) {
2689 Error("duplicate TYPE_OFFSET record in AST file");
2692 F.TypeOffsets = (const uint32_t *)Blob.data();
2693 F.LocalNumTypes = Record[0];
2694 unsigned LocalBaseTypeIndex = Record[1];
2695 F.BaseTypeIndex = getTotalNumTypes();
2697 if (F.LocalNumTypes > 0) {
2698 // Introduce the global -> local mapping for types within this module.
2699 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
2701 // Introduce the local -> global mapping for types within this module.
2702 F.TypeRemap.insertOrReplace(
2703 std::make_pair(LocalBaseTypeIndex,
2704 F.BaseTypeIndex - LocalBaseTypeIndex));
2706 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
2712 if (F.LocalNumDecls != 0) {
2713 Error("duplicate DECL_OFFSET record in AST file");
2716 F.DeclOffsets = (const DeclOffset *)Blob.data();
2717 F.LocalNumDecls = Record[0];
2718 unsigned LocalBaseDeclID = Record[1];
2719 F.BaseDeclID = getTotalNumDecls();
2721 if (F.LocalNumDecls > 0) {
2722 // Introduce the global -> local mapping for declarations within this
2724 GlobalDeclMap.insert(
2725 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));
2727 // Introduce the local -> global mapping for declarations within this
2729 F.DeclRemap.insertOrReplace(
2730 std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));
2732 // Introduce the global -> local mapping for declarations within this
2734 F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
2736 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls);
2741 case TU_UPDATE_LEXICAL: {
2742 DeclContext *TU = Context.getTranslationUnitDecl();
2743 LexicalContents Contents(
2744 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
2746 static_cast<unsigned int>(Blob.size() / 4));
2747 TULexicalDecls.push_back(std::make_pair(&F, Contents));
2748 TU->setHasExternalLexicalStorage(true);
2752 case UPDATE_VISIBLE: {
2754 serialization::DeclID ID = ReadDeclID(F, Record, Idx);
2755 auto *Data = (const unsigned char*)Blob.data();
2756 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&F, Data});
2757 // If we've already loaded the decl, perform the updates when we finish
2758 // loading this block.
2759 if (Decl *D = GetExistingDecl(ID))
2760 PendingUpdateRecords.push_back(std::make_pair(ID, D));
2764 case IDENTIFIER_TABLE:
2765 F.IdentifierTableData = Blob.data();
2767 F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
2768 (const unsigned char *)F.IdentifierTableData + Record[0],
2769 (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
2770 (const unsigned char *)F.IdentifierTableData,
2771 ASTIdentifierLookupTrait(*this, F));
2773 PP.getIdentifierTable().setExternalIdentifierLookup(this);
2777 case IDENTIFIER_OFFSET: {
2778 if (F.LocalNumIdentifiers != 0) {
2779 Error("duplicate IDENTIFIER_OFFSET record in AST file");
2782 F.IdentifierOffsets = (const uint32_t *)Blob.data();
2783 F.LocalNumIdentifiers = Record[0];
2784 unsigned LocalBaseIdentifierID = Record[1];
2785 F.BaseIdentifierID = getTotalNumIdentifiers();
2787 if (F.LocalNumIdentifiers > 0) {
2788 // Introduce the global -> local mapping for identifiers within this
2790 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
2793 // Introduce the local -> global mapping for identifiers within this
2795 F.IdentifierRemap.insertOrReplace(
2796 std::make_pair(LocalBaseIdentifierID,
2797 F.BaseIdentifierID - LocalBaseIdentifierID));
2799 IdentifiersLoaded.resize(IdentifiersLoaded.size()
2800 + F.LocalNumIdentifiers);
2805 case INTERESTING_IDENTIFIERS:
2806 F.PreloadIdentifierOffsets.assign(Record.begin(), Record.end());
2809 case EAGERLY_DESERIALIZED_DECLS:
2810 // FIXME: Skip reading this record if our ASTConsumer doesn't care
2811 // about "interesting" decls (for instance, if we're building a module).
2812 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2813 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2816 case MODULAR_CODEGEN_DECLS:
2817 // FIXME: Skip reading this record if our ASTConsumer doesn't care about
2818 // them (ie: if we're not codegenerating this module).
2819 if (F.Kind == MK_MainFile)
2820 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2821 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2825 if (SpecialTypes.empty()) {
2826 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2827 SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
2831 if (SpecialTypes.size() != Record.size()) {
2832 Error("invalid special-types record");
2836 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
2837 serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
2838 if (!SpecialTypes[I])
2839 SpecialTypes[I] = ID;
2840 // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
2846 TotalNumStatements += Record[0];
2847 TotalNumMacros += Record[1];
2848 TotalLexicalDeclContexts += Record[2];
2849 TotalVisibleDeclContexts += Record[3];
2852 case UNUSED_FILESCOPED_DECLS:
2853 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2854 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
2857 case DELEGATING_CTORS:
2858 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2859 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
2862 case WEAK_UNDECLARED_IDENTIFIERS:
2863 if (Record.size() % 4 != 0) {
2864 Error("invalid weak identifiers record");
2868 // FIXME: Ignore weak undeclared identifiers from non-original PCH
2869 // files. This isn't the way to do it :)
2870 WeakUndeclaredIdentifiers.clear();
2872 // Translate the weak, undeclared identifiers into global IDs.
2873 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
2874 WeakUndeclaredIdentifiers.push_back(
2875 getGlobalIdentifierID(F, Record[I++]));
2876 WeakUndeclaredIdentifiers.push_back(
2877 getGlobalIdentifierID(F, Record[I++]));
2878 WeakUndeclaredIdentifiers.push_back(
2879 ReadSourceLocation(F, Record, I).getRawEncoding());
2880 WeakUndeclaredIdentifiers.push_back(Record[I++]);
2884 case SELECTOR_OFFSETS: {
2885 F.SelectorOffsets = (const uint32_t *)Blob.data();
2886 F.LocalNumSelectors = Record[0];
2887 unsigned LocalBaseSelectorID = Record[1];
2888 F.BaseSelectorID = getTotalNumSelectors();
2890 if (F.LocalNumSelectors > 0) {
2891 // Introduce the global -> local mapping for selectors within this
2893 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));
2895 // Introduce the local -> global mapping for selectors within this
2897 F.SelectorRemap.insertOrReplace(
2898 std::make_pair(LocalBaseSelectorID,
2899 F.BaseSelectorID - LocalBaseSelectorID));
2901 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors);
2907 F.SelectorLookupTableData = (const unsigned char *)Blob.data();
2909 F.SelectorLookupTable
2910 = ASTSelectorLookupTable::Create(
2911 F.SelectorLookupTableData + Record[0],
2912 F.SelectorLookupTableData,
2913 ASTSelectorLookupTrait(*this, F));
2914 TotalNumMethodPoolEntries += Record[1];
2917 case REFERENCED_SELECTOR_POOL:
2918 if (!Record.empty()) {
2919 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
2920 ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
2922 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
2928 case PP_COUNTER_VALUE:
2929 if (!Record.empty() && Listener)
2930 Listener->ReadCounter(F, Record[0]);
2933 case FILE_SORTED_DECLS:
2934 F.FileSortedDecls = (const DeclID *)Blob.data();
2935 F.NumFileSortedDecls = Record[0];
2938 case SOURCE_LOCATION_OFFSETS: {
2939 F.SLocEntryOffsets = (const uint32_t *)Blob.data();
2940 F.LocalNumSLocEntries = Record[0];
2941 unsigned SLocSpaceSize = Record[1];
2942 std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
2943 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries,
2945 if (!F.SLocEntryBaseID) {
2946 Error("ran out of source locations");
2949 // Make our entry in the range map. BaseID is negative and growing, so
2950 // we invert it. Because we invert it, though, we need the other end of
2952 unsigned RangeStart =
2953 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
2954 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
2955 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);
2957 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
2958 assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0);
2959 GlobalSLocOffsetMap.insert(
2960 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
2961 - SLocSpaceSize,&F));
2963 // Initialize the remapping table.
2964 // Invalid stays invalid.
2965 F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
2966 // This module. Base was 2 when being compiled.
2967 F.SLocRemap.insertOrReplace(std::make_pair(2U,
2968 static_cast<int>(F.SLocEntryBaseOffset - 2)));
2970 TotalNumSLocEntries += F.LocalNumSLocEntries;
2974 case MODULE_OFFSET_MAP:
2975 F.ModuleOffsetMap = Blob;
2978 case SOURCE_MANAGER_LINE_TABLE:
2979 if (ParseLineTable(F, Record))
2983 case SOURCE_LOCATION_PRELOADS: {
2984 // Need to transform from the local view (1-based IDs) to the global view,
2985 // which is based off F.SLocEntryBaseID.
2986 if (!F.PreloadSLocEntries.empty()) {
2987 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
2991 F.PreloadSLocEntries.swap(Record);
2995 case EXT_VECTOR_DECLS:
2996 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2997 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
3001 if (Record.size() % 3 != 0) {
3002 Error("Invalid VTABLE_USES record");
3006 // Later tables overwrite earlier ones.
3007 // FIXME: Modules will have some trouble with this. This is clearly not
3008 // the right way to do this.
3011 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3012 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
3013 VTableUses.push_back(
3014 ReadSourceLocation(F, Record, Idx).getRawEncoding());
3015 VTableUses.push_back(Record[Idx++]);
3019 case PENDING_IMPLICIT_INSTANTIATIONS:
3020 if (PendingInstantiations.size() % 2 != 0) {
3021 Error("Invalid existing PendingInstantiations");
3025 if (Record.size() % 2 != 0) {
3026 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3030 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3031 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
3032 PendingInstantiations.push_back(
3033 ReadSourceLocation(F, Record, I).getRawEncoding());
3037 case SEMA_DECL_REFS:
3038 if (Record.size() != 3) {
3039 Error("Invalid SEMA_DECL_REFS block");
3042 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3043 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3046 case PPD_ENTITIES_OFFSETS: {
3047 F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3048 assert(Blob.size() % sizeof(PPEntityOffset) == 0);
3049 F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3051 unsigned LocalBasePreprocessedEntityID = Record[0];
3053 unsigned StartingID;
3054 if (!PP.getPreprocessingRecord())
3055 PP.createPreprocessingRecord();
3056 if (!PP.getPreprocessingRecord()->getExternalSource())
3057 PP.getPreprocessingRecord()->SetExternalSource(*this);
3059 = PP.getPreprocessingRecord()
3060 ->allocateLoadedEntities(F.NumPreprocessedEntities);
3061 F.BasePreprocessedEntityID = StartingID;
3063 if (F.NumPreprocessedEntities > 0) {
3064 // Introduce the global -> local mapping for preprocessed entities in
3066 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));
3068 // Introduce the local -> global mapping for preprocessed entities in
3070 F.PreprocessedEntityRemap.insertOrReplace(
3071 std::make_pair(LocalBasePreprocessedEntityID,
3072 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3078 case DECL_UPDATE_OFFSETS: {
3079 if (Record.size() % 2 != 0) {
3080 Error("invalid DECL_UPDATE_OFFSETS block in AST file");
3083 for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3084 GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
3085 DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));
3087 // If we've already loaded the decl, perform the updates when we finish
3088 // loading this block.
3089 if (Decl *D = GetExistingDecl(ID))
3090 PendingUpdateRecords.push_back(std::make_pair(ID, D));
3095 case OBJC_CATEGORIES_MAP: {
3096 if (F.LocalNumObjCCategoriesInMap != 0) {
3097 Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
3101 F.LocalNumObjCCategoriesInMap = Record[0];
3102 F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3106 case OBJC_CATEGORIES:
3107 F.ObjCCategories.swap(Record);
3110 case CUDA_SPECIAL_DECL_REFS:
3111 // Later tables overwrite earlier ones.
3112 // FIXME: Modules will have trouble with this.
3113 CUDASpecialDeclRefs.clear();
3114 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3115 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3118 case HEADER_SEARCH_TABLE: {
3119 F.HeaderFileInfoTableData = Blob.data();
3120 F.LocalNumHeaderFileInfos = Record[1];
3122 F.HeaderFileInfoTable
3123 = HeaderFileInfoLookupTable::Create(
3124 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3125 (const unsigned char *)F.HeaderFileInfoTableData,
3126 HeaderFileInfoTrait(*this, F,
3127 &PP.getHeaderSearchInfo(),
3128 Blob.data() + Record[2]));
3130 PP.getHeaderSearchInfo().SetExternalSource(this);
3131 if (!PP.getHeaderSearchInfo().getExternalLookup())
3132 PP.getHeaderSearchInfo().SetExternalLookup(this);
3137 case FP_PRAGMA_OPTIONS:
3138 // Later tables overwrite earlier ones.
3139 FPPragmaOptions.swap(Record);
3142 case OPENCL_EXTENSIONS:
3143 for (unsigned I = 0, E = Record.size(); I != E; ) {
3144 auto Name = ReadString(Record, I);
3145 auto &Opt = OpenCLExtensions.OptMap[Name];
3146 Opt.Supported = Record[I++] != 0;
3147 Opt.Enabled = Record[I++] != 0;
3148 Opt.Avail = Record[I++];
3149 Opt.Core = Record[I++];
3153 case OPENCL_EXTENSION_TYPES:
3154 for (unsigned I = 0, E = Record.size(); I != E;) {
3155 auto TypeID = static_cast<::TypeID>(Record[I++]);
3156 auto *Type = GetType(TypeID).getTypePtr();
3157 auto NumExt = static_cast<unsigned>(Record[I++]);
3158 for (unsigned II = 0; II != NumExt; ++II) {
3159 auto Ext = ReadString(Record, I);
3160 OpenCLTypeExtMap[Type].insert(Ext);
3165 case OPENCL_EXTENSION_DECLS:
3166 for (unsigned I = 0, E = Record.size(); I != E;) {
3167 auto DeclID = static_cast<::DeclID>(Record[I++]);
3168 auto *Decl = GetDecl(DeclID);
3169 auto NumExt = static_cast<unsigned>(Record[I++]);
3170 for (unsigned II = 0; II != NumExt; ++II) {
3171 auto Ext = ReadString(Record, I);
3172 OpenCLDeclExtMap[Decl].insert(Ext);
3177 case TENTATIVE_DEFINITIONS:
3178 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3179 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
3182 case KNOWN_NAMESPACES:
3183 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3184 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
3187 case UNDEFINED_BUT_USED:
3188 if (UndefinedButUsed.size() % 2 != 0) {
3189 Error("Invalid existing UndefinedButUsed");
3193 if (Record.size() % 2 != 0) {
3194 Error("invalid undefined-but-used record");
3197 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3198 UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
3199 UndefinedButUsed.push_back(
3200 ReadSourceLocation(F, Record, I).getRawEncoding());
3203 case DELETE_EXPRS_TO_ANALYZE:
3204 for (unsigned I = 0, N = Record.size(); I != N;) {
3205 DelayedDeleteExprs.push_back(getGlobalDeclID(F, Record[I++]));
3206 const uint64_t Count = Record[I++];
3207 DelayedDeleteExprs.push_back(Count);
3208 for (uint64_t C = 0; C < Count; ++C) {
3209 DelayedDeleteExprs.push_back(ReadSourceLocation(F, Record, I).getRawEncoding());
3210 bool IsArrayForm = Record[I++] == 1;
3211 DelayedDeleteExprs.push_back(IsArrayForm);
3216 case IMPORTED_MODULES: {
3217 if (!F.isModule()) {
3218 // If we aren't loading a module (which has its own exports), make
3219 // all of the imported modules visible.
3220 // FIXME: Deal with macros-only imports.
3221 for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3222 unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
3223 SourceLocation Loc = ReadSourceLocation(F, Record, I);
3225 ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
3226 if (DeserializationListener)
3227 DeserializationListener->ModuleImportRead(GlobalID, Loc);
3234 case MACRO_OFFSET: {
3235 if (F.LocalNumMacros != 0) {
3236 Error("duplicate MACRO_OFFSET record in AST file");
3239 F.MacroOffsets = (const uint32_t *)Blob.data();
3240 F.LocalNumMacros = Record[0];
3241 unsigned LocalBaseMacroID = Record[1];
3242 F.BaseMacroID = getTotalNumMacros();
3244 if (F.LocalNumMacros > 0) {
3245 // Introduce the global -> local mapping for macros within this module.
3246 GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));
3248 // Introduce the local -> global mapping for macros within this module.
3249 F.MacroRemap.insertOrReplace(
3250 std::make_pair(LocalBaseMacroID,
3251 F.BaseMacroID - LocalBaseMacroID));
3253 MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros);
3258 case LATE_PARSED_TEMPLATE: {
3259 LateParsedTemplates.append(Record.begin(), Record.end());
3263 case OPTIMIZE_PRAGMA_OPTIONS:
3264 if (Record.size() != 1) {
3265 Error("invalid pragma optimize record");
3268 OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
3271 case MSSTRUCT_PRAGMA_OPTIONS:
3272 if (Record.size() != 1) {
3273 Error("invalid pragma ms_struct record");
3276 PragmaMSStructState = Record[0];
3279 case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
3280 if (Record.size() != 2) {
3281 Error("invalid pragma ms_struct record");
3284 PragmaMSPointersToMembersState = Record[0];
3285 PointersToMembersPragmaLocation = ReadSourceLocation(F, Record[1]);
3288 case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
3289 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3290 UnusedLocalTypedefNameCandidates.push_back(
3291 getGlobalDeclID(F, Record[I]));
3294 case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
3295 if (Record.size() != 1) {
3296 Error("invalid cuda pragma options record");
3299 ForceCUDAHostDeviceDepth = Record[0];
3302 case PACK_PRAGMA_OPTIONS: {
3303 if (Record.size() < 3) {
3304 Error("invalid pragma pack record");
3307 PragmaPackCurrentValue = Record[0];
3308 PragmaPackCurrentLocation = ReadSourceLocation(F, Record[1]);
3309 unsigned NumStackEntries = Record[2];
3311 // Reset the stack when importing a new module.
3312 PragmaPackStack.clear();
3313 for (unsigned I = 0; I < NumStackEntries; ++I) {
3314 PragmaPackStackEntry Entry;
3315 Entry.Value = Record[Idx++];
3316 Entry.Location = ReadSourceLocation(F, Record[Idx++]);
3317 PragmaPackStrings.push_back(ReadString(Record, Idx));
3318 Entry.SlotLabel = PragmaPackStrings.back();
3319 PragmaPackStack.push_back(Entry);
3327 void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
3328 assert(!F.ModuleOffsetMap.empty() && "no module offset map to read");
3330 // Additional remapping information.
3331 const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
3332 const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
3333 F.ModuleOffsetMap = StringRef();
3335 // If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
3336 if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
3337 F.SLocRemap.insert(std::make_pair(0U, 0));
3338 F.SLocRemap.insert(std::make_pair(2U, 1));
3341 // Continuous range maps we may be updating in our module.
3342 typedef ContinuousRangeMap<uint32_t, int, 2>::Builder
3344 RemapBuilder SLocRemap(F.SLocRemap);
3345 RemapBuilder IdentifierRemap(F.IdentifierRemap);
3346 RemapBuilder MacroRemap(F.MacroRemap);
3347 RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
3348 RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
3349 RemapBuilder SelectorRemap(F.SelectorRemap);
3350 RemapBuilder DeclRemap(F.DeclRemap);
3351 RemapBuilder TypeRemap(F.TypeRemap);
3353 while (Data < DataEnd) {
3354 // FIXME: Looking up dependency modules by filename is horrible.
3355 using namespace llvm::support;
3356 uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
3357 StringRef Name = StringRef((const char*)Data, Len);
3359 ModuleFile *OM = ModuleMgr.lookup(Name);
3362 "SourceLocation remap refers to unknown module, cannot find ";
3368 uint32_t SLocOffset =
3369 endian::readNext<uint32_t, little, unaligned>(Data);
3370 uint32_t IdentifierIDOffset =
3371 endian::readNext<uint32_t, little, unaligned>(Data);
3372 uint32_t MacroIDOffset =
3373 endian::readNext<uint32_t, little, unaligned>(Data);
3374 uint32_t PreprocessedEntityIDOffset =
3375 endian::readNext<uint32_t, little, unaligned>(Data);
3376 uint32_t SubmoduleIDOffset =
3377 endian::readNext<uint32_t, little, unaligned>(Data);
3378 uint32_t SelectorIDOffset =
3379 endian::readNext<uint32_t, little, unaligned>(Data);
3380 uint32_t DeclIDOffset =
3381 endian::readNext<uint32_t, little, unaligned>(Data);
3382 uint32_t TypeIndexOffset =
3383 endian::readNext<uint32_t, little, unaligned>(Data);
3385 uint32_t None = std::numeric_limits<uint32_t>::max();
3387 auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
3388 RemapBuilder &Remap) {
3390 Remap.insert(std::make_pair(Offset,
3391 static_cast<int>(BaseOffset - Offset)));
3393 mapOffset(SLocOffset, OM->SLocEntryBaseOffset, SLocRemap);
3394 mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
3395 mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
3396 mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
3397 PreprocessedEntityRemap);
3398 mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
3399 mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
3400 mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
3401 mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
3403 // Global -> local mappings.
3404 F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
3408 ASTReader::ASTReadResult
3409 ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
3410 const ModuleFile *ImportedBy,
3411 unsigned ClientLoadCapabilities) {
3413 F.ModuleMapPath = ReadPath(F, Record, Idx);
3415 if (F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule) {
3416 // For an explicitly-loaded module, we don't care whether the original
3417 // module map file exists or matches.
3421 // Try to resolve ModuleName in the current header search context and
3422 // verify that it is found in the same module map file as we saved. If the
3423 // top-level AST file is a main file, skip this check because there is no
3424 // usable header search context.
3425 assert(!F.ModuleName.empty() &&
3426 "MODULE_NAME should come before MODULE_MAP_FILE");
3427 if (F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
3428 // An implicitly-loaded module file should have its module listed in some
3429 // module map file that we've already loaded.
3430 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
3431 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
3432 const FileEntry *ModMap = M ? Map.getModuleMapFileForUniquing(M) : nullptr;
3434 assert(ImportedBy && "top-level import should be verified");
3435 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0) {
3436 if (auto *ASTFE = M ? M->getASTFile() : nullptr)
3437 // This module was defined by an imported (explicit) module.
3438 Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
3439 << ASTFE->getName();
3441 // This module was built with a different module map.
3442 Diag(diag::err_imported_module_not_found)
3443 << F.ModuleName << F.FileName << ImportedBy->FileName
3449 assert(M->Name == F.ModuleName && "found module with different name");
3451 // Check the primary module map file.
3452 const FileEntry *StoredModMap = FileMgr.getFile(F.ModuleMapPath);
3453 if (StoredModMap == nullptr || StoredModMap != ModMap) {
3454 assert(ModMap && "found module is missing module map file");
3455 assert(ImportedBy && "top-level import should be verified");
3456 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3457 Diag(diag::err_imported_module_modmap_changed)
3458 << F.ModuleName << ImportedBy->FileName
3459 << ModMap->getName() << F.ModuleMapPath;
3463 llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
3464 for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
3465 // FIXME: we should use input files rather than storing names.
3466 std::string Filename = ReadPath(F, Record, Idx);
3467 const FileEntry *F =
3468 FileMgr.getFile(Filename, false, false);
3470 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3471 Error("could not find file '" + Filename +"' referenced by AST file");
3474 AdditionalStoredMaps.insert(F);
3477 // Check any additional module map files (e.g. module.private.modulemap)
3478 // that are not in the pcm.
3479 if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
3480 for (const FileEntry *ModMap : *AdditionalModuleMaps) {
3481 // Remove files that match
3482 // Note: SmallPtrSet::erase is really remove
3483 if (!AdditionalStoredMaps.erase(ModMap)) {
3484 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3485 Diag(diag::err_module_different_modmap)
3486 << F.ModuleName << /*new*/0 << ModMap->getName();
3492 // Check any additional module map files that are in the pcm, but not
3493 // found in header search. Cases that match are already removed.
3494 for (const FileEntry *ModMap : AdditionalStoredMaps) {
3495 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3496 Diag(diag::err_module_different_modmap)
3497 << F.ModuleName << /*not new*/1 << ModMap->getName();
3503 Listener->ReadModuleMapFile(F.ModuleMapPath);
3508 /// \brief Move the given method to the back of the global list of methods.
3509 static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
3510 // Find the entry for this selector in the method pool.
3511 Sema::GlobalMethodPool::iterator Known
3512 = S.MethodPool.find(Method->getSelector());
3513 if (Known == S.MethodPool.end())
3516 // Retrieve the appropriate method list.
3517 ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
3518 : Known->second.second;
3520 for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
3522 if (List->getMethod() == Method) {
3530 if (List->getNext())
3531 List->setMethod(List->getNext()->getMethod());
3533 List->setMethod(Method);
3537 void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
3538 assert(Owner->NameVisibility != Module::Hidden && "nothing to make visible?");
3539 for (Decl *D : Names) {
3540 bool wasHidden = D->Hidden;
3543 if (wasHidden && SemaObj) {
3544 if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
3545 moveMethodToBackOfGlobalList(*SemaObj, Method);
3551 void ASTReader::makeModuleVisible(Module *Mod,
3552 Module::NameVisibilityKind NameVisibility,
3553 SourceLocation ImportLoc) {
3554 llvm::SmallPtrSet<Module *, 4> Visited;
3555 SmallVector<Module *, 4> Stack;
3556 Stack.push_back(Mod);
3557 while (!Stack.empty()) {
3558 Mod = Stack.pop_back_val();
3560 if (NameVisibility <= Mod->NameVisibility) {
3561 // This module already has this level of visibility (or greater), so
3562 // there is nothing more to do.
3566 if (!Mod->isAvailable()) {
3567 // Modules that aren't available cannot be made visible.
3571 // Update the module's name visibility.
3572 Mod->NameVisibility = NameVisibility;
3574 // If we've already deserialized any names from this module,
3575 // mark them as visible.
3576 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
3577 if (Hidden != HiddenNamesMap.end()) {
3578 auto HiddenNames = std::move(*Hidden);
3579 HiddenNamesMap.erase(Hidden);
3580 makeNamesVisible(HiddenNames.second, HiddenNames.first);
3581 assert(HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
3582 "making names visible added hidden names");
3585 // Push any exported modules onto the stack to be marked as visible.
3586 SmallVector<Module *, 16> Exports;
3587 Mod->getExportedModules(Exports);
3588 for (SmallVectorImpl<Module *>::iterator
3589 I = Exports.begin(), E = Exports.end(); I != E; ++I) {
3590 Module *Exported = *I;
3591 if (Visited.insert(Exported).second)
3592 Stack.push_back(Exported);
3597 /// We've merged the definition \p MergedDef into the existing definition
3598 /// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
3600 void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
3601 NamedDecl *MergedDef) {
3602 // FIXME: This doesn't correctly handle the case where MergedDef is visible
3603 // in modules other than its owning module. We should instead give the
3604 // ASTContext a list of merged definitions for Def.
3605 if (Def->isHidden()) {
3606 // If MergedDef is visible or becomes visible, make the definition visible.
3607 if (!MergedDef->isHidden())
3608 Def->Hidden = false;
3609 else if (getContext().getLangOpts().ModulesLocalVisibility) {
3610 getContext().mergeDefinitionIntoModule(
3611 Def, MergedDef->getImportedOwningModule(),
3612 /*NotifyListeners*/ false);
3613 PendingMergedDefinitionsToDeduplicate.insert(Def);
3615 auto SubmoduleID = MergedDef->getOwningModuleID();
3616 assert(SubmoduleID && "hidden definition in no module");
3617 HiddenNamesMap[getSubmodule(SubmoduleID)].push_back(Def);
3622 bool ASTReader::loadGlobalIndex() {
3626 if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
3627 !Context.getLangOpts().Modules)
3630 // Try to load the global index.
3631 TriedLoadingGlobalIndex = true;
3632 StringRef ModuleCachePath
3633 = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
3634 std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result
3635 = GlobalModuleIndex::readIndex(ModuleCachePath);
3639 GlobalIndex.reset(Result.first);
3640 ModuleMgr.setGlobalIndex(GlobalIndex.get());
3644 bool ASTReader::isGlobalIndexUnavailable() const {
3645 return Context.getLangOpts().Modules && UseGlobalIndex &&
3646 !hasGlobalIndex() && TriedLoadingGlobalIndex;
3649 static void updateModuleTimestamp(ModuleFile &MF) {
3650 // Overwrite the timestamp file contents so that file's mtime changes.
3651 std::string TimestampFilename = MF.getTimestampFilename();
3653 llvm::raw_fd_ostream OS(TimestampFilename, EC, llvm::sys::fs::F_Text);
3656 OS << "Timestamp file\n";
3659 /// \brief Given a cursor at the start of an AST file, scan ahead and drop the
3660 /// cursor into the start of the given block ID, returning false on success and
3661 /// true on failure.
3662 static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
3664 llvm::BitstreamEntry Entry = Cursor.advance();
3665 switch (Entry.Kind) {
3666 case llvm::BitstreamEntry::Error:
3667 case llvm::BitstreamEntry::EndBlock:
3670 case llvm::BitstreamEntry::Record:
3671 // Ignore top-level records.
3672 Cursor.skipRecord(Entry.ID);
3675 case llvm::BitstreamEntry::SubBlock:
3676 if (Entry.ID == BlockID) {
3677 if (Cursor.EnterSubBlock(BlockID))
3683 if (Cursor.SkipBlock())
3689 ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
3691 SourceLocation ImportLoc,
3692 unsigned ClientLoadCapabilities,
3693 SmallVectorImpl<ImportedSubmodule> *Imported) {
3694 llvm::SaveAndRestore<SourceLocation>
3695 SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
3697 // Defer any pending actions until we get to the end of reading the AST file.
3698 Deserializing AnASTFile(this);
3700 // Bump the generation number.
3701 unsigned PreviousGeneration = incrementGeneration(Context);
3703 unsigned NumModules = ModuleMgr.size();
3704 SmallVector<ImportedModule, 4> Loaded;
3705 switch (ASTReadResult ReadResult =
3706 ReadASTCore(FileName, Type, ImportLoc,
3707 /*ImportedBy=*/nullptr, Loaded, 0, 0,
3708 ASTFileSignature(), ClientLoadCapabilities)) {
3712 case VersionMismatch:
3713 case ConfigurationMismatch:
3715 llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
3716 for (const ImportedModule &IM : Loaded)
3717 LoadedSet.insert(IM.Mod);
3719 ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, LoadedSet,
3720 Context.getLangOpts().Modules
3721 ? &PP.getHeaderSearchInfo().getModuleMap()
3724 // If we find that any modules are unusable, the global index is going
3725 // to be out-of-date. Just remove it.
3726 GlobalIndex.reset();
3727 ModuleMgr.setGlobalIndex(nullptr);
3734 // Here comes stuff that we only do once the entire chain is loaded.
3736 // Load the AST blocks of all of the modules that we loaded.
3737 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3738 MEnd = Loaded.end();
3740 ModuleFile &F = *M->Mod;
3742 // Read the AST block.
3743 if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
3746 // Read the extension blocks.
3747 while (!SkipCursorToBlock(F.Stream, EXTENSION_BLOCK_ID)) {
3748 if (ASTReadResult Result = ReadExtensionBlock(F))
3752 // Once read, set the ModuleFile bit base offset and update the size in
3753 // bits of all files we've seen.
3754 F.GlobalBitOffset = TotalModulesSizeInBits;
3755 TotalModulesSizeInBits += F.SizeInBits;
3756 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));
3758 // Preload SLocEntries.
3759 for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
3760 int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
3761 // Load it through the SourceManager and don't call ReadSLocEntry()
3762 // directly because the entry may have already been loaded in which case
3763 // calling ReadSLocEntry() directly would trigger an assertion in
3765 SourceMgr.getLoadedSLocEntryByID(Index);
3768 // Preload all the pending interesting identifiers by marking them out of
3770 for (auto Offset : F.PreloadIdentifierOffsets) {
3771 const unsigned char *Data = reinterpret_cast<const unsigned char *>(
3772 F.IdentifierTableData + Offset);
3774 ASTIdentifierLookupTrait Trait(*this, F);
3775 auto KeyDataLen = Trait.ReadKeyDataLength(Data);
3776 auto Key = Trait.ReadKey(Data, KeyDataLen.first);
3777 auto &II = PP.getIdentifierTable().getOwn(Key);
3778 II.setOutOfDate(true);
3780 // Mark this identifier as being from an AST file so that we can track
3781 // whether we need to serialize it.
3782 markIdentifierFromAST(*this, II);
3784 // Associate the ID with the identifier so that the writer can reuse it.
3785 auto ID = Trait.ReadIdentifierID(Data + KeyDataLen.first);
3786 SetIdentifierInfo(ID, &II);
3790 // Setup the import locations and notify the module manager that we've
3791 // committed to these module files.
3792 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3793 MEnd = Loaded.end();
3795 ModuleFile &F = *M->Mod;
3797 ModuleMgr.moduleFileAccepted(&F);
3799 // Set the import location.
3800 F.DirectImportLoc = ImportLoc;
3801 // FIXME: We assume that locations from PCH / preamble do not need
3804 F.ImportLoc = M->ImportLoc;
3806 F.ImportLoc = TranslateSourceLocation(*M->ImportedBy, M->ImportLoc);
3809 if (!Context.getLangOpts().CPlusPlus ||
3810 (Type != MK_ImplicitModule && Type != MK_ExplicitModule &&
3811 Type != MK_PrebuiltModule)) {
3812 // Mark all of the identifiers in the identifier table as being out of date,
3813 // so that various accessors know to check the loaded modules when the
3814 // identifier is used.
3816 // For C++ modules, we don't need information on many identifiers (just
3817 // those that provide macros or are poisoned), so we mark all of
3818 // the interesting ones via PreloadIdentifierOffsets.
3819 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
3820 IdEnd = PP.getIdentifierTable().end();
3822 Id->second->setOutOfDate(true);
3824 // Mark selectors as out of date.
3825 for (auto Sel : SelectorGeneration)
3826 SelectorOutOfDate[Sel.first] = true;
3828 // Resolve any unresolved module exports.
3829 for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
3830 UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
3831 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
3832 Module *ResolvedMod = getSubmodule(GlobalID);
3834 switch (Unresolved.Kind) {
3835 case UnresolvedModuleRef::Conflict:
3837 Module::Conflict Conflict;
3838 Conflict.Other = ResolvedMod;
3839 Conflict.Message = Unresolved.String.str();
3840 Unresolved.Mod->Conflicts.push_back(Conflict);
3844 case UnresolvedModuleRef::Import:
3846 Unresolved.Mod->Imports.insert(ResolvedMod);
3849 case UnresolvedModuleRef::Export:
3850 if (ResolvedMod || Unresolved.IsWildcard)
3851 Unresolved.Mod->Exports.push_back(
3852 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
3856 UnresolvedModuleRefs.clear();
3859 Imported->append(ImportedModules.begin(),
3860 ImportedModules.end());
3862 // FIXME: How do we load the 'use'd modules? They may not be submodules.
3863 // Might be unnecessary as use declarations are only used to build the
3866 InitializeContext();
3871 if (DeserializationListener)
3872 DeserializationListener->ReaderInitialized(this);
3874 ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
3875 if (PrimaryModule.OriginalSourceFileID.isValid()) {
3876 PrimaryModule.OriginalSourceFileID
3877 = FileID::get(PrimaryModule.SLocEntryBaseID
3878 + PrimaryModule.OriginalSourceFileID.getOpaqueValue() - 1);
3880 // If this AST file is a precompiled preamble, then set the
3881 // preamble file ID of the source manager to the file source file
3882 // from which the preamble was built.
3883 if (Type == MK_Preamble) {
3884 SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
3885 } else if (Type == MK_MainFile) {
3886 SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
3890 // For any Objective-C class definitions we have already loaded, make sure
3891 // that we load any additional categories.
3892 for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
3893 loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
3894 ObjCClassesLoaded[I],
3895 PreviousGeneration);
3898 if (PP.getHeaderSearchInfo()
3899 .getHeaderSearchOpts()
3900 .ModulesValidateOncePerBuildSession) {
3901 // Now we are certain that the module and all modules it depends on are
3902 // up to date. Create or update timestamp files for modules that are
3903 // located in the module cache (not for PCH files that could be anywhere
3904 // in the filesystem).
3905 for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
3906 ImportedModule &M = Loaded[I];
3907 if (M.Mod->Kind == MK_ImplicitModule) {
3908 updateModuleTimestamp(*M.Mod);
3916 static ASTFileSignature readASTFileSignature(StringRef PCH);
3918 /// \brief Whether \p Stream starts with the AST/PCH file magic number 'CPCH'.
3919 static bool startsWithASTFileMagic(BitstreamCursor &Stream) {
3920 return Stream.canSkipToPos(4) &&
3921 Stream.Read(8) == 'C' &&
3922 Stream.Read(8) == 'P' &&
3923 Stream.Read(8) == 'C' &&
3924 Stream.Read(8) == 'H';
3927 static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
3931 case MK_ImplicitModule:
3932 case MK_ExplicitModule:
3933 case MK_PrebuiltModule:
3937 return 2; // main source file
3939 llvm_unreachable("unknown module kind");
3942 ASTReader::ASTReadResult
3943 ASTReader::ReadASTCore(StringRef FileName,
3945 SourceLocation ImportLoc,
3946 ModuleFile *ImportedBy,
3947 SmallVectorImpl<ImportedModule> &Loaded,
3948 off_t ExpectedSize, time_t ExpectedModTime,
3949 ASTFileSignature ExpectedSignature,
3950 unsigned ClientLoadCapabilities) {
3952 std::string ErrorStr;
3953 ModuleManager::AddModuleResult AddResult
3954 = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
3955 getGeneration(), ExpectedSize, ExpectedModTime,
3956 ExpectedSignature, readASTFileSignature,
3959 switch (AddResult) {
3960 case ModuleManager::AlreadyLoaded:
3963 case ModuleManager::NewlyLoaded:
3964 // Load module file below.
3967 case ModuleManager::Missing:
3968 // The module file was missing; if the client can handle that, return
3970 if (ClientLoadCapabilities & ARR_Missing)
3973 // Otherwise, return an error.
3974 Diag(diag::err_module_file_not_found) << moduleKindForDiagnostic(Type)
3975 << FileName << !ErrorStr.empty()
3979 case ModuleManager::OutOfDate:
3980 // We couldn't load the module file because it is out-of-date. If the
3981 // client can handle out-of-date, return it.
3982 if (ClientLoadCapabilities & ARR_OutOfDate)
3985 // Otherwise, return an error.
3986 Diag(diag::err_module_file_out_of_date) << moduleKindForDiagnostic(Type)
3987 << FileName << !ErrorStr.empty()
3992 assert(M && "Missing module file");
3994 // FIXME: This seems rather a hack. Should CurrentDir be part of the
3996 if (FileName != "-") {
3997 CurrentDir = llvm::sys::path::parent_path(FileName);
3998 if (CurrentDir.empty()) CurrentDir = ".";
4002 BitstreamCursor &Stream = F.Stream;
4003 Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(*F.Buffer));
4004 F.SizeInBits = F.Buffer->getBufferSize() * 8;
4006 // Sniff for the signature.
4007 if (!startsWithASTFileMagic(Stream)) {
4008 Diag(diag::err_module_file_invalid) << moduleKindForDiagnostic(Type)
4013 // This is used for compatibility with older PCH formats.
4014 bool HaveReadControlBlock = false;
4016 llvm::BitstreamEntry Entry = Stream.advance();
4018 switch (Entry.Kind) {
4019 case llvm::BitstreamEntry::Error:
4020 case llvm::BitstreamEntry::Record:
4021 case llvm::BitstreamEntry::EndBlock:
4022 Error("invalid record at top-level of AST file");
4025 case llvm::BitstreamEntry::SubBlock:
4030 case CONTROL_BLOCK_ID:
4031 HaveReadControlBlock = true;
4032 switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
4034 // Check that we didn't try to load a non-module AST file as a module.
4036 // FIXME: Should we also perform the converse check? Loading a module as
4037 // a PCH file sort of works, but it's a bit wonky.
4038 if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
4039 Type == MK_PrebuiltModule) &&
4040 F.ModuleName.empty()) {
4041 auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
4042 if (Result != OutOfDate ||
4043 (ClientLoadCapabilities & ARR_OutOfDate) == 0)
4044 Diag(diag::err_module_file_not_module) << FileName;
4049 case Failure: return Failure;
4050 case Missing: return Missing;
4051 case OutOfDate: return OutOfDate;
4052 case VersionMismatch: return VersionMismatch;
4053 case ConfigurationMismatch: return ConfigurationMismatch;
4054 case HadErrors: return HadErrors;
4059 if (!HaveReadControlBlock) {
4060 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
4061 Diag(diag::err_pch_version_too_old);
4062 return VersionMismatch;
4065 // Record that we've loaded this module.
4066 Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
4069 case UNHASHED_CONTROL_BLOCK_ID:
4070 // This block is handled using look-ahead during ReadControlBlock. We
4071 // shouldn't get here!
4072 Error("malformed block record in AST file");
4076 if (Stream.SkipBlock()) {
4077 Error("malformed block record in AST file");
4087 ASTReader::ASTReadResult
4088 ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
4089 unsigned ClientLoadCapabilities) {
4090 const HeaderSearchOptions &HSOpts =
4091 PP.getHeaderSearchInfo().getHeaderSearchOpts();
4092 bool AllowCompatibleConfigurationMismatch =
4093 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
4095 ASTReadResult Result = readUnhashedControlBlockImpl(
4096 &F, F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
4098 WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);
4100 // If F was directly imported by another module, it's implicitly validated by
4101 // the importing module.
4102 if (DisableValidation || WasImportedBy ||
4103 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
4106 if (Result == Failure) {
4107 Error("malformed block record in AST file");
4111 if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
4112 // If this module has already been finalized in the PCMCache, we're stuck
4113 // with it; we can only load a single version of each module.
4115 // This can happen when a module is imported in two contexts: in one, as a
4116 // user module; in another, as a system module (due to an import from
4117 // another module marked with the [system] flag). It usually indicates a
4118 // bug in the module map: this module should also be marked with [system].
4120 // If -Wno-system-headers (the default), and the first import is as a
4121 // system module, then validation will fail during the as-user import,
4122 // since -Werror flags won't have been validated. However, it's reasonable
4123 // to treat this consistently as a system module.
4125 // If -Wsystem-headers, the PCM on disk was built with
4126 // -Wno-system-headers, and the first import is as a user module, then
4127 // validation will fail during the as-system import since the PCM on disk
4128 // doesn't guarantee that -Werror was respected. However, the -Werror
4129 // flags were checked during the initial as-user import.
4130 if (PCMCache.isBufferFinal(F.FileName)) {
4131 Diag(diag::warn_module_system_bit_conflict) << F.FileName;
4139 ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
4140 ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
4141 bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
4142 bool ValidateDiagnosticOptions) {
4143 // Initialize a stream.
4144 BitstreamCursor Stream(StreamData);
4146 // Sniff for the signature.
4147 if (!startsWithASTFileMagic(Stream))
4150 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4151 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4154 // Read all of the records in the options block.
4156 ASTReadResult Result = Success;
4158 llvm::BitstreamEntry Entry = Stream.advance();
4160 switch (Entry.Kind) {
4161 case llvm::BitstreamEntry::Error:
4162 case llvm::BitstreamEntry::SubBlock:
4165 case llvm::BitstreamEntry::EndBlock:
4168 case llvm::BitstreamEntry::Record:
4169 // The interesting case.
4173 // Read and process a record.
4176 (UnhashedControlBlockRecordTypes)Stream.readRecord(Entry.ID, Record)) {
4179 std::copy(Record.begin(), Record.end(), F->Signature.data());
4182 case DIAGNOSTIC_OPTIONS: {
4183 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
4184 if (Listener && ValidateDiagnosticOptions &&
4185 !AllowCompatibleConfigurationMismatch &&
4186 ParseDiagnosticOptions(Record, Complain, *Listener))
4187 Result = OutOfDate; // Don't return early. Read the signature.
4190 case DIAG_PRAGMA_MAPPINGS:
4193 if (F->PragmaDiagMappings.empty())
4194 F->PragmaDiagMappings.swap(Record);
4196 F->PragmaDiagMappings.insert(F->PragmaDiagMappings.end(),
4197 Record.begin(), Record.end());
4203 /// Parse a record and blob containing module file extension metadata.
4204 static bool parseModuleFileExtensionMetadata(
4205 const SmallVectorImpl<uint64_t> &Record,
4207 ModuleFileExtensionMetadata &Metadata) {
4208 if (Record.size() < 4) return true;
4210 Metadata.MajorVersion = Record[0];
4211 Metadata.MinorVersion = Record[1];
4213 unsigned BlockNameLen = Record[2];
4214 unsigned UserInfoLen = Record[3];
4216 if (BlockNameLen + UserInfoLen > Blob.size()) return true;
4218 Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
4219 Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
4220 Blob.data() + BlockNameLen + UserInfoLen);
4224 ASTReader::ASTReadResult ASTReader::ReadExtensionBlock(ModuleFile &F) {
4225 BitstreamCursor &Stream = F.Stream;
4229 llvm::BitstreamEntry Entry = Stream.advance();
4230 switch (Entry.Kind) {
4231 case llvm::BitstreamEntry::SubBlock:
4232 if (Stream.SkipBlock())
4237 case llvm::BitstreamEntry::EndBlock:
4240 case llvm::BitstreamEntry::Error:
4243 case llvm::BitstreamEntry::Record:
4249 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4251 case EXTENSION_METADATA: {
4252 ModuleFileExtensionMetadata Metadata;
4253 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4256 // Find a module file extension with this block name.
4257 auto Known = ModuleFileExtensions.find(Metadata.BlockName);
4258 if (Known == ModuleFileExtensions.end()) break;
4261 if (auto Reader = Known->second->createExtensionReader(Metadata, *this,
4263 F.ExtensionReaders.push_back(std::move(Reader));
4274 void ASTReader::InitializeContext() {
4275 // If there's a listener, notify them that we "read" the translation unit.
4276 if (DeserializationListener)
4277 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
4278 Context.getTranslationUnitDecl());
4280 // FIXME: Find a better way to deal with collisions between these
4281 // built-in types. Right now, we just ignore the problem.
4283 // Load the special types.
4284 if (SpecialTypes.size() >= NumSpecialTypeIDs) {
4285 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
4286 if (!Context.CFConstantStringTypeDecl)
4287 Context.setCFConstantStringType(GetType(String));
4290 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
4291 QualType FileType = GetType(File);
4292 if (FileType.isNull()) {
4293 Error("FILE type is NULL");
4297 if (!Context.FILEDecl) {
4298 if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
4299 Context.setFILEDecl(Typedef->getDecl());
4301 const TagType *Tag = FileType->getAs<TagType>();
4303 Error("Invalid FILE type in AST file");
4306 Context.setFILEDecl(Tag->getDecl());
4311 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
4312 QualType Jmp_bufType = GetType(Jmp_buf);
4313 if (Jmp_bufType.isNull()) {
4314 Error("jmp_buf type is NULL");
4318 if (!Context.jmp_bufDecl) {
4319 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
4320 Context.setjmp_bufDecl(Typedef->getDecl());
4322 const TagType *Tag = Jmp_bufType->getAs<TagType>();
4324 Error("Invalid jmp_buf type in AST file");
4327 Context.setjmp_bufDecl(Tag->getDecl());
4332 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
4333 QualType Sigjmp_bufType = GetType(Sigjmp_buf);
4334 if (Sigjmp_bufType.isNull()) {
4335 Error("sigjmp_buf type is NULL");
4339 if (!Context.sigjmp_bufDecl) {
4340 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
4341 Context.setsigjmp_bufDecl(Typedef->getDecl());
4343 const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
4344 assert(Tag && "Invalid sigjmp_buf type in AST file");
4345 Context.setsigjmp_bufDecl(Tag->getDecl());
4350 if (unsigned ObjCIdRedef
4351 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
4352 if (Context.ObjCIdRedefinitionType.isNull())
4353 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
4356 if (unsigned ObjCClassRedef
4357 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
4358 if (Context.ObjCClassRedefinitionType.isNull())
4359 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
4362 if (unsigned ObjCSelRedef
4363 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
4364 if (Context.ObjCSelRedefinitionType.isNull())
4365 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
4368 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
4369 QualType Ucontext_tType = GetType(Ucontext_t);
4370 if (Ucontext_tType.isNull()) {
4371 Error("ucontext_t type is NULL");
4375 if (!Context.ucontext_tDecl) {
4376 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
4377 Context.setucontext_tDecl(Typedef->getDecl());
4379 const TagType *Tag = Ucontext_tType->getAs<TagType>();
4380 assert(Tag && "Invalid ucontext_t type in AST file");
4381 Context.setucontext_tDecl(Tag->getDecl());
4387 ReadPragmaDiagnosticMappings(Context.getDiagnostics());
4389 // If there were any CUDA special declarations, deserialize them.
4390 if (!CUDASpecialDeclRefs.empty()) {
4391 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!");
4392 Context.setcudaConfigureCallDecl(
4393 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
4396 // Re-export any modules that were imported by a non-module AST file.
4397 // FIXME: This does not make macro-only imports visible again.
4398 for (auto &Import : ImportedModules) {
4399 if (Module *Imported = getSubmodule(Import.ID)) {
4400 makeModuleVisible(Imported, Module::AllVisible,
4401 /*ImportLoc=*/Import.ImportLoc);
4402 if (Import.ImportLoc.isValid())
4403 PP.makeModuleVisible(Imported, Import.ImportLoc);
4404 // FIXME: should we tell Sema to make the module visible too?
4407 ImportedModules.clear();
4410 void ASTReader::finalizeForWriting() {
4411 // Nothing to do for now.
4414 /// \brief Reads and return the signature record from \p PCH's control block, or
4416 static ASTFileSignature readASTFileSignature(StringRef PCH) {
4417 BitstreamCursor Stream(PCH);
4418 if (!startsWithASTFileMagic(Stream))
4419 return ASTFileSignature();
4421 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4422 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4423 return ASTFileSignature();
4425 // Scan for SIGNATURE inside the diagnostic options block.
4426 ASTReader::RecordData Record;
4428 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4429 if (Entry.Kind != llvm::BitstreamEntry::Record)
4430 return ASTFileSignature();
4434 if (SIGNATURE == Stream.readRecord(Entry.ID, Record, &Blob))
4435 return {{{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
4436 (uint32_t)Record[3], (uint32_t)Record[4]}}};
4440 /// \brief Retrieve the name of the original source file name
4441 /// directly from the AST file, without actually loading the AST
4443 std::string ASTReader::getOriginalSourceFile(
4444 const std::string &ASTFileName, FileManager &FileMgr,
4445 const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
4446 // Open the AST file.
4447 auto Buffer = FileMgr.getBufferForFile(ASTFileName);
4449 Diags.Report(diag::err_fe_unable_to_read_pch_file)
4450 << ASTFileName << Buffer.getError().message();
4451 return std::string();
4454 // Initialize the stream
4455 BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(**Buffer));
4457 // Sniff for the signature.
4458 if (!startsWithASTFileMagic(Stream)) {
4459 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName;
4460 return std::string();
4463 // Scan for the CONTROL_BLOCK_ID block.
4464 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
4465 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4466 return std::string();
4469 // Scan for ORIGINAL_FILE inside the control block.
4472 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4473 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4474 return std::string();
4476 if (Entry.Kind != llvm::BitstreamEntry::Record) {
4477 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4478 return std::string();
4483 if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE)
4490 class SimplePCHValidator : public ASTReaderListener {
4491 const LangOptions &ExistingLangOpts;
4492 const TargetOptions &ExistingTargetOpts;
4493 const PreprocessorOptions &ExistingPPOpts;
4494 std::string ExistingModuleCachePath;
4495 FileManager &FileMgr;
4498 SimplePCHValidator(const LangOptions &ExistingLangOpts,
4499 const TargetOptions &ExistingTargetOpts,
4500 const PreprocessorOptions &ExistingPPOpts,
4501 StringRef ExistingModuleCachePath,
4502 FileManager &FileMgr)
4503 : ExistingLangOpts(ExistingLangOpts),
4504 ExistingTargetOpts(ExistingTargetOpts),
4505 ExistingPPOpts(ExistingPPOpts),
4506 ExistingModuleCachePath(ExistingModuleCachePath),
4511 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
4512 bool AllowCompatibleDifferences) override {
4513 return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr,
4514 AllowCompatibleDifferences);
4517 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
4518 bool AllowCompatibleDifferences) override {
4519 return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr,
4520 AllowCompatibleDifferences);
4523 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
4524 StringRef SpecificModuleCachePath,
4525 bool Complain) override {
4526 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
4527 ExistingModuleCachePath,
4528 nullptr, ExistingLangOpts);
4531 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
4533 std::string &SuggestedPredefines) override {
4534 return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
4535 SuggestedPredefines, ExistingLangOpts);
4539 } // end anonymous namespace
4541 bool ASTReader::readASTFileControlBlock(
4542 StringRef Filename, FileManager &FileMgr,
4543 const PCHContainerReader &PCHContainerRdr,
4544 bool FindModuleFileExtensions,
4545 ASTReaderListener &Listener, bool ValidateDiagnosticOptions) {
4546 // Open the AST file.
4547 // FIXME: This allows use of the VFS; we do not allow use of the
4548 // VFS when actually loading a module.
4549 auto Buffer = FileMgr.getBufferForFile(Filename);
4554 // Initialize the stream
4555 StringRef Bytes = PCHContainerRdr.ExtractPCH(**Buffer);
4556 BitstreamCursor Stream(Bytes);
4558 // Sniff for the signature.
4559 if (!startsWithASTFileMagic(Stream))
4562 // Scan for the CONTROL_BLOCK_ID block.
4563 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
4566 bool NeedsInputFiles = Listener.needsInputFileVisitation();
4567 bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
4568 bool NeedsImports = Listener.needsImportVisitation();
4569 BitstreamCursor InputFilesCursor;
4572 std::string ModuleDir;
4573 bool DoneWithControlBlock = false;
4574 while (!DoneWithControlBlock) {
4575 llvm::BitstreamEntry Entry = Stream.advance();
4577 switch (Entry.Kind) {
4578 case llvm::BitstreamEntry::SubBlock: {
4580 case OPTIONS_BLOCK_ID: {
4581 std::string IgnoredSuggestedPredefines;
4582 if (ReadOptionsBlock(Stream, ARR_ConfigurationMismatch | ARR_OutOfDate,
4583 /*AllowCompatibleConfigurationMismatch*/ false,
4584 Listener, IgnoredSuggestedPredefines) != Success)
4589 case INPUT_FILES_BLOCK_ID:
4590 InputFilesCursor = Stream;
4591 if (Stream.SkipBlock() ||
4593 ReadBlockAbbrevs(InputFilesCursor, INPUT_FILES_BLOCK_ID)))
4598 if (Stream.SkipBlock())
4606 case llvm::BitstreamEntry::EndBlock:
4607 DoneWithControlBlock = true;
4610 case llvm::BitstreamEntry::Error:
4613 case llvm::BitstreamEntry::Record:
4617 if (DoneWithControlBlock) break;
4621 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4622 switch ((ControlRecordTypes)RecCode) {
4624 if (Record[0] != VERSION_MAJOR)
4627 if (Listener.ReadFullVersionInformation(Blob))
4633 Listener.ReadModuleName(Blob);
4635 case MODULE_DIRECTORY:
4638 case MODULE_MAP_FILE: {
4640 auto Path = ReadString(Record, Idx);
4641 ResolveImportedPath(Path, ModuleDir);
4642 Listener.ReadModuleMapFile(Path);
4645 case INPUT_FILE_OFFSETS: {
4646 if (!NeedsInputFiles)
4649 unsigned NumInputFiles = Record[0];
4650 unsigned NumUserFiles = Record[1];
4651 const uint64_t *InputFileOffs = (const uint64_t *)Blob.data();
4652 for (unsigned I = 0; I != NumInputFiles; ++I) {
4653 // Go find this input file.
4654 bool isSystemFile = I >= NumUserFiles;
4656 if (isSystemFile && !NeedsSystemInputFiles)
4657 break; // the rest are system input files
4659 BitstreamCursor &Cursor = InputFilesCursor;
4660 SavedStreamPosition SavedPosition(Cursor);
4661 Cursor.JumpToBit(InputFileOffs[I]);
4663 unsigned Code = Cursor.ReadCode();
4666 bool shouldContinue = false;
4667 switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) {
4669 bool Overridden = static_cast<bool>(Record[3]);
4670 std::string Filename = Blob;
4671 ResolveImportedPath(Filename, ModuleDir);
4672 shouldContinue = Listener.visitInputFile(
4673 Filename, isSystemFile, Overridden, /*IsExplicitModule*/false);
4676 if (!shouldContinue)
4686 unsigned Idx = 0, N = Record.size();
4688 // Read information about the AST file.
4689 Idx += 5; // ImportLoc, Size, ModTime, Signature
4690 std::string Filename = ReadString(Record, Idx);
4691 ResolveImportedPath(Filename, ModuleDir);
4692 Listener.visitImport(Filename);
4698 // No other validation to perform.
4703 // Look for module file extension blocks, if requested.
4704 if (FindModuleFileExtensions) {
4705 BitstreamCursor SavedStream = Stream;
4706 while (!SkipCursorToBlock(Stream, EXTENSION_BLOCK_ID)) {
4707 bool DoneWithExtensionBlock = false;
4708 while (!DoneWithExtensionBlock) {
4709 llvm::BitstreamEntry Entry = Stream.advance();
4711 switch (Entry.Kind) {
4712 case llvm::BitstreamEntry::SubBlock:
4713 if (Stream.SkipBlock())
4718 case llvm::BitstreamEntry::EndBlock:
4719 DoneWithExtensionBlock = true;
4722 case llvm::BitstreamEntry::Error:
4725 case llvm::BitstreamEntry::Record:
4731 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4733 case EXTENSION_METADATA: {
4734 ModuleFileExtensionMetadata Metadata;
4735 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4738 Listener.readModuleFileExtension(Metadata);
4744 Stream = SavedStream;
4747 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4748 if (readUnhashedControlBlockImpl(
4749 nullptr, Bytes, ARR_ConfigurationMismatch | ARR_OutOfDate,
4750 /*AllowCompatibleConfigurationMismatch*/ false, &Listener,
4751 ValidateDiagnosticOptions) != Success)
4757 bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
4758 const PCHContainerReader &PCHContainerRdr,
4759 const LangOptions &LangOpts,
4760 const TargetOptions &TargetOpts,
4761 const PreprocessorOptions &PPOpts,
4762 StringRef ExistingModuleCachePath) {
4763 SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
4764 ExistingModuleCachePath, FileMgr);
4765 return !readASTFileControlBlock(Filename, FileMgr, PCHContainerRdr,
4766 /*FindModuleFileExtensions=*/false,
4768 /*ValidateDiagnosticOptions=*/true);
4771 ASTReader::ASTReadResult
4772 ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
4773 // Enter the submodule block.
4774 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
4775 Error("malformed submodule block record in AST file");
4779 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
4781 Module *CurrentModule = nullptr;
4782 Module::ModuleKind ModuleKind = Module::ModuleMapModule;
4785 llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks();
4787 switch (Entry.Kind) {
4788 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
4789 case llvm::BitstreamEntry::Error:
4790 Error("malformed block record in AST file");
4792 case llvm::BitstreamEntry::EndBlock:
4794 case llvm::BitstreamEntry::Record:
4795 // The interesting case.
4802 auto Kind = F.Stream.readRecord(Entry.ID, Record, &Blob);
4804 if ((Kind == SUBMODULE_METADATA) != First) {
4805 Error("submodule metadata record should be at beginning of block");
4810 // Submodule information is only valid if we have a current module.
4811 // FIXME: Should we error on these cases?
4812 if (!CurrentModule && Kind != SUBMODULE_METADATA &&
4813 Kind != SUBMODULE_DEFINITION)
4817 default: // Default behavior: ignore.
4820 case SUBMODULE_DEFINITION: {
4821 if (Record.size() < 8) {
4822 Error("malformed module definition");
4826 StringRef Name = Blob;
4828 SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
4829 SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
4830 bool IsFramework = Record[Idx++];
4831 bool IsExplicit = Record[Idx++];
4832 bool IsSystem = Record[Idx++];
4833 bool IsExternC = Record[Idx++];
4834 bool InferSubmodules = Record[Idx++];
4835 bool InferExplicitSubmodules = Record[Idx++];
4836 bool InferExportWildcard = Record[Idx++];
4837 bool ConfigMacrosExhaustive = Record[Idx++];
4839 Module *ParentModule = nullptr;
4841 ParentModule = getSubmodule(Parent);
4843 // Retrieve this (sub)module from the module map, creating it if
4846 ModMap.findOrCreateModule(Name, ParentModule, IsFramework, IsExplicit)
4849 // FIXME: set the definition loc for CurrentModule, or call
4850 // ModMap.setInferredModuleAllowedBy()
4852 SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
4853 if (GlobalIndex >= SubmodulesLoaded.size() ||
4854 SubmodulesLoaded[GlobalIndex]) {
4855 Error("too many submodules");
4859 if (!ParentModule) {
4860 if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
4861 if (CurFile != F.File) {
4862 if (!Diags.isDiagnosticInFlight()) {
4863 Diag(diag::err_module_file_conflict)
4864 << CurrentModule->getTopLevelModuleName()
4865 << CurFile->getName()
4866 << F.File->getName();
4872 CurrentModule->setASTFile(F.File);
4875 CurrentModule->Kind = ModuleKind;
4876 CurrentModule->Signature = F.Signature;
4877 CurrentModule->IsFromModuleFile = true;
4878 CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
4879 CurrentModule->IsExternC = IsExternC;
4880 CurrentModule->InferSubmodules = InferSubmodules;
4881 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
4882 CurrentModule->InferExportWildcard = InferExportWildcard;
4883 CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
4884 if (DeserializationListener)
4885 DeserializationListener->ModuleRead(GlobalID, CurrentModule);
4887 SubmodulesLoaded[GlobalIndex] = CurrentModule;
4889 // Clear out data that will be replaced by what is in the module file.
4890 CurrentModule->LinkLibraries.clear();
4891 CurrentModule->ConfigMacros.clear();
4892 CurrentModule->UnresolvedConflicts.clear();
4893 CurrentModule->Conflicts.clear();
4895 // The module is available unless it's missing a requirement; relevant
4896 // requirements will be (re-)added by SUBMODULE_REQUIRES records.
4897 // Missing headers that were present when the module was built do not
4898 // make it unavailable -- if we got this far, this must be an explicitly
4899 // imported module file.
4900 CurrentModule->Requirements.clear();
4901 CurrentModule->MissingHeaders.clear();
4902 CurrentModule->IsMissingRequirement =
4903 ParentModule && ParentModule->IsMissingRequirement;
4904 CurrentModule->IsAvailable = !CurrentModule->IsMissingRequirement;
4908 case SUBMODULE_UMBRELLA_HEADER: {
4909 std::string Filename = Blob;
4910 ResolveImportedPath(F, Filename);
4911 if (auto *Umbrella = PP.getFileManager().getFile(Filename)) {
4912 if (!CurrentModule->getUmbrellaHeader())
4913 ModMap.setUmbrellaHeader(CurrentModule, Umbrella, Blob);
4914 else if (CurrentModule->getUmbrellaHeader().Entry != Umbrella) {
4915 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
4916 Error("mismatched umbrella headers in submodule");
4923 case SUBMODULE_HEADER:
4924 case SUBMODULE_EXCLUDED_HEADER:
4925 case SUBMODULE_PRIVATE_HEADER:
4926 // We lazily associate headers with their modules via the HeaderInfo table.
4927 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
4928 // of complete filenames or remove it entirely.
4931 case SUBMODULE_TEXTUAL_HEADER:
4932 case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
4933 // FIXME: Textual headers are not marked in the HeaderInfo table. Load
4937 case SUBMODULE_TOPHEADER: {
4938 CurrentModule->addTopHeaderFilename(Blob);
4942 case SUBMODULE_UMBRELLA_DIR: {
4943 std::string Dirname = Blob;
4944 ResolveImportedPath(F, Dirname);
4945 if (auto *Umbrella = PP.getFileManager().getDirectory(Dirname)) {
4946 if (!CurrentModule->getUmbrellaDir())
4947 ModMap.setUmbrellaDir(CurrentModule, Umbrella, Blob);
4948 else if (CurrentModule->getUmbrellaDir().Entry != Umbrella) {
4949 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
4950 Error("mismatched umbrella directories in submodule");
4957 case SUBMODULE_METADATA: {
4958 F.BaseSubmoduleID = getTotalNumSubmodules();
4959 F.LocalNumSubmodules = Record[0];
4960 unsigned LocalBaseSubmoduleID = Record[1];
4961 if (F.LocalNumSubmodules > 0) {
4962 // Introduce the global -> local mapping for submodules within this
4964 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));
4966 // Introduce the local -> global mapping for submodules within this
4968 F.SubmoduleRemap.insertOrReplace(
4969 std::make_pair(LocalBaseSubmoduleID,
4970 F.BaseSubmoduleID - LocalBaseSubmoduleID));
4972 SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules);
4974 ModuleKind = (Module::ModuleKind)Record[2];
4978 case SUBMODULE_IMPORTS: {
4979 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
4980 UnresolvedModuleRef Unresolved;
4981 Unresolved.File = &F;
4982 Unresolved.Mod = CurrentModule;
4983 Unresolved.ID = Record[Idx];
4984 Unresolved.Kind = UnresolvedModuleRef::Import;
4985 Unresolved.IsWildcard = false;
4986 UnresolvedModuleRefs.push_back(Unresolved);
4991 case SUBMODULE_EXPORTS: {
4992 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
4993 UnresolvedModuleRef Unresolved;
4994 Unresolved.File = &F;
4995 Unresolved.Mod = CurrentModule;
4996 Unresolved.ID = Record[Idx];
4997 Unresolved.Kind = UnresolvedModuleRef::Export;
4998 Unresolved.IsWildcard = Record[Idx + 1];
4999 UnresolvedModuleRefs.push_back(Unresolved);
5002 // Once we've loaded the set of exports, there's no reason to keep
5003 // the parsed, unresolved exports around.
5004 CurrentModule->UnresolvedExports.clear();
5007 case SUBMODULE_REQUIRES: {
5008 CurrentModule->addRequirement(Blob, Record[0], Context.getLangOpts(),
5009 Context.getTargetInfo());
5013 case SUBMODULE_LINK_LIBRARY:
5014 CurrentModule->LinkLibraries.push_back(
5015 Module::LinkLibrary(Blob, Record[0]));
5018 case SUBMODULE_CONFIG_MACRO:
5019 CurrentModule->ConfigMacros.push_back(Blob.str());
5022 case SUBMODULE_CONFLICT: {
5023 UnresolvedModuleRef Unresolved;
5024 Unresolved.File = &F;
5025 Unresolved.Mod = CurrentModule;
5026 Unresolved.ID = Record[0];
5027 Unresolved.Kind = UnresolvedModuleRef::Conflict;
5028 Unresolved.IsWildcard = false;
5029 Unresolved.String = Blob;
5030 UnresolvedModuleRefs.push_back(Unresolved);
5034 case SUBMODULE_INITIALIZERS:
5035 SmallVector<uint32_t, 16> Inits;
5036 for (auto &ID : Record)
5037 Inits.push_back(getGlobalDeclID(F, ID));
5038 Context.addLazyModuleInitializers(CurrentModule, Inits);
5044 /// \brief Parse the record that corresponds to a LangOptions data
5047 /// This routine parses the language options from the AST file and then gives
5048 /// them to the AST listener if one is set.
5050 /// \returns true if the listener deems the file unacceptable, false otherwise.
5051 bool ASTReader::ParseLanguageOptions(const RecordData &Record,
5053 ASTReaderListener &Listener,
5054 bool AllowCompatibleDifferences) {
5055 LangOptions LangOpts;
5057 #define LANGOPT(Name, Bits, Default, Description) \
5058 LangOpts.Name = Record[Idx++];
5059 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
5060 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
5061 #include "clang/Basic/LangOptions.def"
5062 #define SANITIZER(NAME, ID) \
5063 LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
5064 #include "clang/Basic/Sanitizers.def"
5066 for (unsigned N = Record[Idx++]; N; --N)
5067 LangOpts.ModuleFeatures.push_back(ReadString(Record, Idx));
5069 ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
5070 VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
5071 LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
5073 LangOpts.CurrentModule = ReadString(Record, Idx);
5076 for (unsigned N = Record[Idx++]; N; --N) {
5077 LangOpts.CommentOpts.BlockCommandNames.push_back(
5078 ReadString(Record, Idx));
5080 LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
5082 // OpenMP offloading options.
5083 for (unsigned N = Record[Idx++]; N; --N) {
5084 LangOpts.OMPTargetTriples.push_back(llvm::Triple(ReadString(Record, Idx)));
5087 LangOpts.OMPHostIRFile = ReadString(Record, Idx);
5089 return Listener.ReadLanguageOptions(LangOpts, Complain,
5090 AllowCompatibleDifferences);
5093 bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
5094 ASTReaderListener &Listener,
5095 bool AllowCompatibleDifferences) {
5097 TargetOptions TargetOpts;
5098 TargetOpts.Triple = ReadString(Record, Idx);
5099 TargetOpts.CPU = ReadString(Record, Idx);
5100 TargetOpts.ABI = ReadString(Record, Idx);
5101 for (unsigned N = Record[Idx++]; N; --N) {
5102 TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
5104 for (unsigned N = Record[Idx++]; N; --N) {
5105 TargetOpts.Features.push_back(ReadString(Record, Idx));
5108 return Listener.ReadTargetOptions(TargetOpts, Complain,
5109 AllowCompatibleDifferences);
5112 bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
5113 ASTReaderListener &Listener) {
5114 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
5116 #define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
5117 #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
5118 DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
5119 #include "clang/Basic/DiagnosticOptions.def"
5121 for (unsigned N = Record[Idx++]; N; --N)
5122 DiagOpts->Warnings.push_back(ReadString(Record, Idx));
5123 for (unsigned N = Record[Idx++]; N; --N)
5124 DiagOpts->Remarks.push_back(ReadString(Record, Idx));
5126 return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
5129 bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
5130 ASTReaderListener &Listener) {
5131 FileSystemOptions FSOpts;
5133 FSOpts.WorkingDir = ReadString(Record, Idx);
5134 return Listener.ReadFileSystemOptions(FSOpts, Complain);
5137 bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
5139 ASTReaderListener &Listener) {
5140 HeaderSearchOptions HSOpts;
5142 HSOpts.Sysroot = ReadString(Record, Idx);
5145 for (unsigned N = Record[Idx++]; N; --N) {
5146 std::string Path = ReadString(Record, Idx);
5147 frontend::IncludeDirGroup Group
5148 = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
5149 bool IsFramework = Record[Idx++];
5150 bool IgnoreSysRoot = Record[Idx++];
5151 HSOpts.UserEntries.emplace_back(std::move(Path), Group, IsFramework,
5155 // System header prefixes.
5156 for (unsigned N = Record[Idx++]; N; --N) {
5157 std::string Prefix = ReadString(Record, Idx);
5158 bool IsSystemHeader = Record[Idx++];
5159 HSOpts.SystemHeaderPrefixes.emplace_back(std::move(Prefix), IsSystemHeader);
5162 HSOpts.ResourceDir = ReadString(Record, Idx);
5163 HSOpts.ModuleCachePath = ReadString(Record, Idx);
5164 HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
5165 HSOpts.DisableModuleHash = Record[Idx++];
5166 HSOpts.UseBuiltinIncludes = Record[Idx++];
5167 HSOpts.UseStandardSystemIncludes = Record[Idx++];
5168 HSOpts.UseStandardCXXIncludes = Record[Idx++];
5169 HSOpts.UseLibcxx = Record[Idx++];
5170 std::string SpecificModuleCachePath = ReadString(Record, Idx);
5172 return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
5176 bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
5178 ASTReaderListener &Listener,
5179 std::string &SuggestedPredefines) {
5180 PreprocessorOptions PPOpts;
5183 // Macro definitions/undefs
5184 for (unsigned N = Record[Idx++]; N; --N) {
5185 std::string Macro = ReadString(Record, Idx);
5186 bool IsUndef = Record[Idx++];
5187 PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
5191 for (unsigned N = Record[Idx++]; N; --N) {
5192 PPOpts.Includes.push_back(ReadString(Record, Idx));
5196 for (unsigned N = Record[Idx++]; N; --N) {
5197 PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
5200 PPOpts.UsePredefines = Record[Idx++];
5201 PPOpts.DetailedRecord = Record[Idx++];
5202 PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
5203 PPOpts.ImplicitPTHInclude = ReadString(Record, Idx);
5204 PPOpts.ObjCXXARCStandardLibrary =
5205 static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
5206 SuggestedPredefines.clear();
5207 return Listener.ReadPreprocessorOptions(PPOpts, Complain,
5208 SuggestedPredefines);
5211 std::pair<ModuleFile *, unsigned>
5212 ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
5213 GlobalPreprocessedEntityMapType::iterator
5214 I = GlobalPreprocessedEntityMap.find(GlobalIndex);
5215 assert(I != GlobalPreprocessedEntityMap.end() &&
5216 "Corrupted global preprocessed entity map");
5217 ModuleFile *M = I->second;
5218 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
5219 return std::make_pair(M, LocalIndex);
5222 llvm::iterator_range<PreprocessingRecord::iterator>
5223 ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
5224 if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
5225 return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
5226 Mod.NumPreprocessedEntities);
5228 return llvm::make_range(PreprocessingRecord::iterator(),
5229 PreprocessingRecord::iterator());
5232 llvm::iterator_range<ASTReader::ModuleDeclIterator>
5233 ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
5234 return llvm::make_range(
5235 ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
5236 ModuleDeclIterator(this, &Mod,
5237 Mod.FileSortedDecls + Mod.NumFileSortedDecls));
5240 PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
5241 PreprocessedEntityID PPID = Index+1;
5242 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5243 ModuleFile &M = *PPInfo.first;
5244 unsigned LocalIndex = PPInfo.second;
5245 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5247 if (!PP.getPreprocessingRecord()) {
5248 Error("no preprocessing record");
5252 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
5253 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset);
5255 llvm::BitstreamEntry Entry =
5256 M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
5257 if (Entry.Kind != llvm::BitstreamEntry::Record)
5261 SourceRange Range(TranslateSourceLocation(M, PPOffs.getBegin()),
5262 TranslateSourceLocation(M, PPOffs.getEnd()));
5263 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
5266 PreprocessorDetailRecordTypes RecType =
5267 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord(
5268 Entry.ID, Record, &Blob);
5270 case PPD_MACRO_EXPANSION: {
5271 bool isBuiltin = Record[0];
5272 IdentifierInfo *Name = nullptr;
5273 MacroDefinitionRecord *Def = nullptr;
5275 Name = getLocalIdentifier(M, Record[1]);
5277 PreprocessedEntityID GlobalID =
5278 getGlobalPreprocessedEntityID(M, Record[1]);
5279 Def = cast<MacroDefinitionRecord>(
5280 PPRec.getLoadedPreprocessedEntity(GlobalID - 1));
5285 ME = new (PPRec) MacroExpansion(Name, Range);
5287 ME = new (PPRec) MacroExpansion(Def, Range);
5292 case PPD_MACRO_DEFINITION: {
5293 // Decode the identifier info and then check again; if the macro is
5294 // still defined and associated with the identifier,
5295 IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
5296 MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);
5298 if (DeserializationListener)
5299 DeserializationListener->MacroDefinitionRead(PPID, MD);
5304 case PPD_INCLUSION_DIRECTIVE: {
5305 const char *FullFileNameStart = Blob.data() + Record[0];
5306 StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
5307 const FileEntry *File = nullptr;
5308 if (!FullFileName.empty())
5309 File = PP.getFileManager().getFile(FullFileName);
5311 // FIXME: Stable encoding
5312 InclusionDirective::InclusionKind Kind
5313 = static_cast<InclusionDirective::InclusionKind>(Record[2]);
5314 InclusionDirective *ID
5315 = new (PPRec) InclusionDirective(PPRec, Kind,
5316 StringRef(Blob.data(), Record[0]),
5317 Record[1], Record[3],
5324 llvm_unreachable("Invalid PreprocessorDetailRecordTypes");
5327 /// \brief \arg SLocMapI points at a chunk of a module that contains no
5328 /// preprocessed entities or the entities it contains are not the ones we are
5329 /// looking for. Find the next module that contains entities and return the ID
5330 /// of the first entry.
5331 PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
5332 GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
5334 for (GlobalSLocOffsetMapType::const_iterator
5335 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
5336 ModuleFile &M = *SLocMapI->second;
5337 if (M.NumPreprocessedEntities)
5338 return M.BasePreprocessedEntityID;
5341 return getTotalNumPreprocessedEntities();
5346 struct PPEntityComp {
5347 const ASTReader &Reader;
5350 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) { }
5352 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
5353 SourceLocation LHS = getLoc(L);
5354 SourceLocation RHS = getLoc(R);
5355 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5358 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
5359 SourceLocation LHS = getLoc(L);
5360 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5363 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
5364 SourceLocation RHS = getLoc(R);
5365 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5368 SourceLocation getLoc(const PPEntityOffset &PPE) const {
5369 return Reader.TranslateSourceLocation(M, PPE.getBegin());
5373 } // end anonymous namespace
5375 PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
5376 bool EndsAfter) const {
5377 if (SourceMgr.isLocalSourceLocation(Loc))
5378 return getTotalNumPreprocessedEntities();
5380 GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
5381 SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
5382 assert(SLocMapI != GlobalSLocOffsetMap.end() &&
5383 "Corrupted global sloc offset map");
5385 if (SLocMapI->second->NumPreprocessedEntities == 0)
5386 return findNextPreprocessedEntity(SLocMapI);
5388 ModuleFile &M = *SLocMapI->second;
5389 typedef const PPEntityOffset *pp_iterator;
5390 pp_iterator pp_begin = M.PreprocessedEntityOffsets;
5391 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
5393 size_t Count = M.NumPreprocessedEntities;
5395 pp_iterator First = pp_begin;
5399 PPI = std::upper_bound(pp_begin, pp_end, Loc,
5400 PPEntityComp(*this, M));
5402 // Do a binary search manually instead of using std::lower_bound because
5403 // The end locations of entities may be unordered (when a macro expansion
5404 // is inside another macro argument), but for this case it is not important
5405 // whether we get the first macro expansion or its containing macro.
5409 std::advance(PPI, Half);
5410 if (SourceMgr.isBeforeInTranslationUnit(
5411 TranslateSourceLocation(M, PPI->getEnd()), Loc)) {
5414 Count = Count - Half - 1;
5421 return findNextPreprocessedEntity(SLocMapI);
5423 return M.BasePreprocessedEntityID + (PPI - pp_begin);
5426 /// \brief Returns a pair of [Begin, End) indices of preallocated
5427 /// preprocessed entities that \arg Range encompasses.
5428 std::pair<unsigned, unsigned>
5429 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
5430 if (Range.isInvalid())
5431 return std::make_pair(0,0);
5432 assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()));
5434 PreprocessedEntityID BeginID =
5435 findPreprocessedEntity(Range.getBegin(), false);
5436 PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
5437 return std::make_pair(BeginID, EndID);
5440 /// \brief Optionally returns true or false if the preallocated preprocessed
5441 /// entity with index \arg Index came from file \arg FID.
5442 Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
5444 if (FID.isInvalid())
5447 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5448 ModuleFile &M = *PPInfo.first;
5449 unsigned LocalIndex = PPInfo.second;
5450 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5452 SourceLocation Loc = TranslateSourceLocation(M, PPOffs.getBegin());
5453 if (Loc.isInvalid())
5456 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
5464 /// \brief Visitor used to search for information about a header file.
5465 class HeaderFileInfoVisitor {
5466 const FileEntry *FE;
5468 Optional<HeaderFileInfo> HFI;
5471 explicit HeaderFileInfoVisitor(const FileEntry *FE)
5474 bool operator()(ModuleFile &M) {
5475 HeaderFileInfoLookupTable *Table
5476 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
5480 // Look in the on-disk hash table for an entry for this file name.
5481 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE);
5482 if (Pos == Table->end())
5489 Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
5492 } // end anonymous namespace
5494 HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
5495 HeaderFileInfoVisitor Visitor(FE);
5496 ModuleMgr.visit(Visitor);
5497 if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
5500 return HeaderFileInfo();
5503 void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
5504 using DiagState = DiagnosticsEngine::DiagState;
5505 SmallVector<DiagState *, 32> DiagStates;
5507 for (ModuleFile &F : ModuleMgr) {
5509 auto &Record = F.PragmaDiagMappings;
5515 auto ReadDiagState =
5516 [&](const DiagState &BasedOn, SourceLocation Loc,
5517 bool IncludeNonPragmaStates) -> DiagnosticsEngine::DiagState * {
5518 unsigned BackrefID = Record[Idx++];
5520 return DiagStates[BackrefID - 1];
5522 // A new DiagState was created here.
5523 Diag.DiagStates.push_back(BasedOn);
5524 DiagState *NewState = &Diag.DiagStates.back();
5525 DiagStates.push_back(NewState);
5526 unsigned Size = Record[Idx++];
5527 assert(Idx + Size * 2 <= Record.size() &&
5528 "Invalid data, not enough diag/map pairs");
5530 unsigned DiagID = Record[Idx++];
5531 unsigned SeverityAndUpgradedFromWarning = Record[Idx++];
5532 bool WasUpgradedFromWarning =
5533 DiagnosticMapping::deserializeUpgradedFromWarning(
5534 SeverityAndUpgradedFromWarning);
5535 DiagnosticMapping NewMapping =
5536 Diag.makeUserMapping(DiagnosticMapping::deserializeSeverity(
5537 SeverityAndUpgradedFromWarning),
5539 if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
5542 DiagnosticMapping &Mapping = NewState->getOrAddMapping(DiagID);
5544 // If this mapping was specified as a warning but the severity was
5545 // upgraded due to diagnostic settings, simulate the current diagnostic
5546 // settings (and use a warning).
5547 if (WasUpgradedFromWarning && !Mapping.isErrorOrFatal()) {
5548 Mapping = Diag.makeUserMapping(diag::Severity::Warning, Loc);
5552 // Use the deserialized mapping verbatim.
5553 Mapping = NewMapping;
5554 Mapping.setUpgradedFromWarning(WasUpgradedFromWarning);
5559 // Read the first state.
5560 DiagState *FirstState;
5561 if (F.Kind == MK_ImplicitModule) {
5562 // Implicitly-built modules are reused with different diagnostic
5563 // settings. Use the initial diagnostic state from Diag to simulate this
5564 // compilation's diagnostic settings.
5565 FirstState = Diag.DiagStatesByLoc.FirstDiagState;
5566 DiagStates.push_back(FirstState);
5568 // Skip the initial diagnostic state from the serialized module.
5569 assert(Record[0] == 0 &&
5570 "Invalid data, unexpected backref in initial state");
5571 Idx = 2 + Record[1] * 2;
5572 assert(Idx < Record.size() &&
5573 "Invalid data, not enough state change pairs in initial state");
5575 FirstState = ReadDiagState(
5576 F.isModule() ? DiagState() : *Diag.DiagStatesByLoc.CurDiagState,
5577 SourceLocation(), F.isModule());
5580 // Read the state transitions.
5581 unsigned NumLocations = Record[Idx++];
5582 while (NumLocations--) {
5583 assert(Idx < Record.size() &&
5584 "Invalid data, missing pragma diagnostic states");
5585 SourceLocation Loc = ReadSourceLocation(F, Record[Idx++]);
5586 auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
5587 assert(IDAndOffset.second == 0 && "not a start location for a FileID");
5588 unsigned Transitions = Record[Idx++];
5590 // Note that we don't need to set up Parent/ParentOffset here, because
5591 // we won't be changing the diagnostic state within imported FileIDs
5592 // (other than perhaps appending to the main source file, which has no
5594 auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
5595 F.StateTransitions.reserve(F.StateTransitions.size() + Transitions);
5596 for (unsigned I = 0; I != Transitions; ++I) {
5597 unsigned Offset = Record[Idx++];
5599 ReadDiagState(*FirstState, Loc.getLocWithOffset(Offset), false);
5600 F.StateTransitions.push_back({State, Offset});
5604 // Read the final state.
5605 assert(Idx < Record.size() &&
5606 "Invalid data, missing final pragma diagnostic state");
5607 SourceLocation CurStateLoc =
5608 ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
5609 auto *CurState = ReadDiagState(*FirstState, CurStateLoc, false);
5611 if (!F.isModule()) {
5612 Diag.DiagStatesByLoc.CurDiagState = CurState;
5613 Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;
5615 // Preserve the property that the imaginary root file describes the
5617 auto &T = Diag.DiagStatesByLoc.Files[FileID()].StateTransitions;
5619 T.push_back({CurState, 0});
5621 T[0].State = CurState;
5624 // Don't try to read these mappings again.
5629 /// \brief Get the correct cursor and offset for loading a type.
5630 ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
5631 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
5632 assert(I != GlobalTypeMap.end() && "Corrupted global type map");
5633 ModuleFile *M = I->second;
5634 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
5637 /// \brief Read and return the type with the given index..
5639 /// The index is the type ID, shifted and minus the number of predefs. This
5640 /// routine actually reads the record corresponding to the type at the given
5641 /// location. It is a helper routine for GetType, which deals with reading type
5643 QualType ASTReader::readTypeRecord(unsigned Index) {
5644 RecordLocation Loc = TypeCursorForIndex(Index);
5645 BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
5647 // Keep track of where we are in the stream, then jump back there
5648 // after reading this type.
5649 SavedStreamPosition SavedPosition(DeclsCursor);
5651 ReadingKindTracker ReadingKind(Read_Type, *this);
5653 // Note that we are loading a type record.
5654 Deserializing AType(this);
5657 DeclsCursor.JumpToBit(Loc.Offset);
5659 unsigned Code = DeclsCursor.ReadCode();
5660 switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) {
5661 case TYPE_EXT_QUAL: {
5662 if (Record.size() != 2) {
5663 Error("Incorrect encoding of extended qualifier type");
5666 QualType Base = readType(*Loc.F, Record, Idx);
5667 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
5668 return Context.getQualifiedType(Base, Quals);
5671 case TYPE_COMPLEX: {
5672 if (Record.size() != 1) {
5673 Error("Incorrect encoding of complex type");
5676 QualType ElemType = readType(*Loc.F, Record, Idx);
5677 return Context.getComplexType(ElemType);
5680 case TYPE_POINTER: {
5681 if (Record.size() != 1) {
5682 Error("Incorrect encoding of pointer type");
5685 QualType PointeeType = readType(*Loc.F, Record, Idx);
5686 return Context.getPointerType(PointeeType);
5689 case TYPE_DECAYED: {
5690 if (Record.size() != 1) {
5691 Error("Incorrect encoding of decayed type");
5694 QualType OriginalType = readType(*Loc.F, Record, Idx);
5695 QualType DT = Context.getAdjustedParameterType(OriginalType);
5696 if (!isa<DecayedType>(DT))
5697 Error("Decayed type does not decay");
5701 case TYPE_ADJUSTED: {
5702 if (Record.size() != 2) {
5703 Error("Incorrect encoding of adjusted type");
5706 QualType OriginalTy = readType(*Loc.F, Record, Idx);
5707 QualType AdjustedTy = readType(*Loc.F, Record, Idx);
5708 return Context.getAdjustedType(OriginalTy, AdjustedTy);
5711 case TYPE_BLOCK_POINTER: {
5712 if (Record.size() != 1) {
5713 Error("Incorrect encoding of block pointer type");
5716 QualType PointeeType = readType(*Loc.F, Record, Idx);
5717 return Context.getBlockPointerType(PointeeType);
5720 case TYPE_LVALUE_REFERENCE: {
5721 if (Record.size() != 2) {
5722 Error("Incorrect encoding of lvalue reference type");
5725 QualType PointeeType = readType(*Loc.F, Record, Idx);
5726 return Context.getLValueReferenceType(PointeeType, Record[1]);
5729 case TYPE_RVALUE_REFERENCE: {
5730 if (Record.size() != 1) {
5731 Error("Incorrect encoding of rvalue reference type");
5734 QualType PointeeType = readType(*Loc.F, Record, Idx);
5735 return Context.getRValueReferenceType(PointeeType);
5738 case TYPE_MEMBER_POINTER: {
5739 if (Record.size() != 2) {
5740 Error("Incorrect encoding of member pointer type");
5743 QualType PointeeType = readType(*Loc.F, Record, Idx);
5744 QualType ClassType = readType(*Loc.F, Record, Idx);
5745 if (PointeeType.isNull() || ClassType.isNull())
5748 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
5751 case TYPE_CONSTANT_ARRAY: {
5752 QualType ElementType = readType(*Loc.F, Record, Idx);
5753 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5754 unsigned IndexTypeQuals = Record[2];
5756 llvm::APInt Size = ReadAPInt(Record, Idx);
5757 return Context.getConstantArrayType(ElementType, Size,
5758 ASM, IndexTypeQuals);
5761 case TYPE_INCOMPLETE_ARRAY: {
5762 QualType ElementType = readType(*Loc.F, Record, Idx);
5763 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5764 unsigned IndexTypeQuals = Record[2];
5765 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
5768 case TYPE_VARIABLE_ARRAY: {
5769 QualType ElementType = readType(*Loc.F, Record, Idx);
5770 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5771 unsigned IndexTypeQuals = Record[2];
5772 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
5773 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
5774 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
5775 ASM, IndexTypeQuals,
5776 SourceRange(LBLoc, RBLoc));
5780 if (Record.size() != 3) {
5781 Error("incorrect encoding of vector type in AST file");
5785 QualType ElementType = readType(*Loc.F, Record, Idx);
5786 unsigned NumElements = Record[1];
5787 unsigned VecKind = Record[2];
5788 return Context.getVectorType(ElementType, NumElements,
5789 (VectorType::VectorKind)VecKind);
5792 case TYPE_EXT_VECTOR: {
5793 if (Record.size() != 3) {
5794 Error("incorrect encoding of extended vector type in AST file");
5798 QualType ElementType = readType(*Loc.F, Record, Idx);
5799 unsigned NumElements = Record[1];
5800 return Context.getExtVectorType(ElementType, NumElements);
5803 case TYPE_FUNCTION_NO_PROTO: {
5804 if (Record.size() != 6) {
5805 Error("incorrect encoding of no-proto function type");
5808 QualType ResultType = readType(*Loc.F, Record, Idx);
5809 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
5810 (CallingConv)Record[4], Record[5]);
5811 return Context.getFunctionNoProtoType(ResultType, Info);
5814 case TYPE_FUNCTION_PROTO: {
5815 QualType ResultType = readType(*Loc.F, Record, Idx);
5817 FunctionProtoType::ExtProtoInfo EPI;
5818 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
5819 /*hasregparm*/ Record[2],
5820 /*regparm*/ Record[3],
5821 static_cast<CallingConv>(Record[4]),
5822 /*produces*/ Record[5]);
5826 EPI.Variadic = Record[Idx++];
5827 EPI.HasTrailingReturn = Record[Idx++];
5828 EPI.TypeQuals = Record[Idx++];
5829 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
5830 SmallVector<QualType, 8> ExceptionStorage;
5831 readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);
5833 unsigned NumParams = Record[Idx++];
5834 SmallVector<QualType, 16> ParamTypes;
5835 for (unsigned I = 0; I != NumParams; ++I)
5836 ParamTypes.push_back(readType(*Loc.F, Record, Idx));
5838 SmallVector<FunctionProtoType::ExtParameterInfo, 4> ExtParameterInfos;
5839 if (Idx != Record.size()) {
5840 for (unsigned I = 0; I != NumParams; ++I)
5841 ExtParameterInfos.push_back(
5842 FunctionProtoType::ExtParameterInfo
5843 ::getFromOpaqueValue(Record[Idx++]));
5844 EPI.ExtParameterInfos = ExtParameterInfos.data();
5847 assert(Idx == Record.size());
5849 return Context.getFunctionType(ResultType, ParamTypes, EPI);
5852 case TYPE_UNRESOLVED_USING: {
5854 return Context.getTypeDeclType(
5855 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
5858 case TYPE_TYPEDEF: {
5859 if (Record.size() != 2) {
5860 Error("incorrect encoding of typedef type");
5864 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
5865 QualType Canonical = readType(*Loc.F, Record, Idx);
5866 if (!Canonical.isNull())
5867 Canonical = Context.getCanonicalType(Canonical);
5868 return Context.getTypedefType(Decl, Canonical);
5871 case TYPE_TYPEOF_EXPR:
5872 return Context.getTypeOfExprType(ReadExpr(*Loc.F));
5875 if (Record.size() != 1) {
5876 Error("incorrect encoding of typeof(type) in AST file");
5879 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
5880 return Context.getTypeOfType(UnderlyingType);
5883 case TYPE_DECLTYPE: {
5884 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
5885 return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
5888 case TYPE_UNARY_TRANSFORM: {
5889 QualType BaseType = readType(*Loc.F, Record, Idx);
5890 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
5891 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
5892 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
5896 QualType Deduced = readType(*Loc.F, Record, Idx);
5897 AutoTypeKeyword Keyword = (AutoTypeKeyword)Record[Idx++];
5898 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
5899 return Context.getAutoType(Deduced, Keyword, IsDependent);
5902 case TYPE_DEDUCED_TEMPLATE_SPECIALIZATION: {
5903 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
5904 QualType Deduced = readType(*Loc.F, Record, Idx);
5905 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
5906 return Context.getDeducedTemplateSpecializationType(Name, Deduced,
5911 if (Record.size() != 2) {
5912 Error("incorrect encoding of record type");
5916 bool IsDependent = Record[Idx++];
5917 RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
5918 RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
5919 QualType T = Context.getRecordType(RD);
5920 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
5925 if (Record.size() != 2) {
5926 Error("incorrect encoding of enum type");
5930 bool IsDependent = Record[Idx++];
5932 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
5933 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
5937 case TYPE_ATTRIBUTED: {
5938 if (Record.size() != 3) {
5939 Error("incorrect encoding of attributed type");
5942 QualType modifiedType = readType(*Loc.F, Record, Idx);
5943 QualType equivalentType = readType(*Loc.F, Record, Idx);
5944 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]);
5945 return Context.getAttributedType(kind, modifiedType, equivalentType);
5949 if (Record.size() != 1) {
5950 Error("incorrect encoding of paren type");
5953 QualType InnerType = readType(*Loc.F, Record, Idx);
5954 return Context.getParenType(InnerType);
5957 case TYPE_PACK_EXPANSION: {
5958 if (Record.size() != 2) {
5959 Error("incorrect encoding of pack expansion type");
5962 QualType Pattern = readType(*Loc.F, Record, Idx);
5963 if (Pattern.isNull())
5965 Optional<unsigned> NumExpansions;
5967 NumExpansions = Record[1] - 1;
5968 return Context.getPackExpansionType(Pattern, NumExpansions);
5971 case TYPE_ELABORATED: {
5973 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
5974 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
5975 QualType NamedType = readType(*Loc.F, Record, Idx);
5976 return Context.getElaboratedType(Keyword, NNS, NamedType);
5979 case TYPE_OBJC_INTERFACE: {
5981 ObjCInterfaceDecl *ItfD
5982 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx);
5983 return Context.getObjCInterfaceType(ItfD->getCanonicalDecl());
5986 case TYPE_OBJC_TYPE_PARAM: {
5988 ObjCTypeParamDecl *Decl
5989 = ReadDeclAs<ObjCTypeParamDecl>(*Loc.F, Record, Idx);
5990 unsigned NumProtos = Record[Idx++];
5991 SmallVector<ObjCProtocolDecl*, 4> Protos;
5992 for (unsigned I = 0; I != NumProtos; ++I)
5993 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
5994 return Context.getObjCTypeParamType(Decl, Protos);
5996 case TYPE_OBJC_OBJECT: {
5998 QualType Base = readType(*Loc.F, Record, Idx);
5999 unsigned NumTypeArgs = Record[Idx++];
6000 SmallVector<QualType, 4> TypeArgs;
6001 for (unsigned I = 0; I != NumTypeArgs; ++I)
6002 TypeArgs.push_back(readType(*Loc.F, Record, Idx));
6003 unsigned NumProtos = Record[Idx++];
6004 SmallVector<ObjCProtocolDecl*, 4> Protos;
6005 for (unsigned I = 0; I != NumProtos; ++I)
6006 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
6007 bool IsKindOf = Record[Idx++];
6008 return Context.getObjCObjectType(Base, TypeArgs, Protos, IsKindOf);
6011 case TYPE_OBJC_OBJECT_POINTER: {
6013 QualType Pointee = readType(*Loc.F, Record, Idx);
6014 return Context.getObjCObjectPointerType(Pointee);
6017 case TYPE_SUBST_TEMPLATE_TYPE_PARM: {
6019 QualType Parm = readType(*Loc.F, Record, Idx);
6020 QualType Replacement = readType(*Loc.F, Record, Idx);
6021 return Context.getSubstTemplateTypeParmType(
6022 cast<TemplateTypeParmType>(Parm),
6023 Context.getCanonicalType(Replacement));
6026 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: {
6028 QualType Parm = readType(*Loc.F, Record, Idx);
6029 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx);
6030 return Context.getSubstTemplateTypeParmPackType(
6031 cast<TemplateTypeParmType>(Parm),
6035 case TYPE_INJECTED_CLASS_NAME: {
6036 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx);
6037 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable
6038 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable
6039 // for AST reading, too much interdependencies.
6040 const Type *T = nullptr;
6041 for (auto *DI = D; DI; DI = DI->getPreviousDecl()) {
6042 if (const Type *Existing = DI->getTypeForDecl()) {
6048 T = new (Context, TypeAlignment) InjectedClassNameType(D, TST);
6049 for (auto *DI = D; DI; DI = DI->getPreviousDecl())
6050 DI->setTypeForDecl(T);
6052 return QualType(T, 0);
6055 case TYPE_TEMPLATE_TYPE_PARM: {
6057 unsigned Depth = Record[Idx++];
6058 unsigned Index = Record[Idx++];
6059 bool Pack = Record[Idx++];
6060 TemplateTypeParmDecl *D
6061 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx);
6062 return Context.getTemplateTypeParmType(Depth, Index, Pack, D);
6065 case TYPE_DEPENDENT_NAME: {
6067 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6068 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6069 const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
6070 QualType Canon = readType(*Loc.F, Record, Idx);
6071 if (!Canon.isNull())
6072 Canon = Context.getCanonicalType(Canon);
6073 return Context.getDependentNameType(Keyword, NNS, Name, Canon);
6076 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: {
6078 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6079 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6080 const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
6081 unsigned NumArgs = Record[Idx++];
6082 SmallVector<TemplateArgument, 8> Args;
6083 Args.reserve(NumArgs);
6085 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx));
6086 return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name,
6090 case TYPE_DEPENDENT_SIZED_ARRAY: {
6094 QualType ElementType = readType(*Loc.F, Record, Idx);
6095 ArrayType::ArraySizeModifier ASM
6096 = (ArrayType::ArraySizeModifier)Record[Idx++];
6097 unsigned IndexTypeQuals = Record[Idx++];
6099 // DependentSizedArrayType
6100 Expr *NumElts = ReadExpr(*Loc.F);
6101 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx);
6103 return Context.getDependentSizedArrayType(ElementType, NumElts, ASM,
6104 IndexTypeQuals, Brackets);
6107 case TYPE_TEMPLATE_SPECIALIZATION: {
6109 bool IsDependent = Record[Idx++];
6110 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6111 SmallVector<TemplateArgument, 8> Args;
6112 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx);
6113 QualType Underlying = readType(*Loc.F, Record, Idx);
6115 if (Underlying.isNull())
6116 T = Context.getCanonicalTemplateSpecializationType(Name, Args);
6118 T = Context.getTemplateSpecializationType(Name, Args, Underlying);
6119 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6124 if (Record.size() != 1) {
6125 Error("Incorrect encoding of atomic type");
6128 QualType ValueType = readType(*Loc.F, Record, Idx);
6129 return Context.getAtomicType(ValueType);
6133 if (Record.size() != 2) {
6134 Error("Incorrect encoding of pipe type");
6138 // Reading the pipe element type.
6139 QualType ElementType = readType(*Loc.F, Record, Idx);
6140 unsigned ReadOnly = Record[1];
6141 return Context.getPipeType(ElementType, ReadOnly);
6144 case TYPE_DEPENDENT_SIZED_EXT_VECTOR: {
6147 // DependentSizedExtVectorType
6148 QualType ElementType = readType(*Loc.F, Record, Idx);
6149 Expr *SizeExpr = ReadExpr(*Loc.F);
6150 SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
6152 return Context.getDependentSizedExtVectorType(ElementType, SizeExpr,
6156 llvm_unreachable("Invalid TypeCode!");
6159 void ASTReader::readExceptionSpec(ModuleFile &ModuleFile,
6160 SmallVectorImpl<QualType> &Exceptions,
6161 FunctionProtoType::ExceptionSpecInfo &ESI,
6162 const RecordData &Record, unsigned &Idx) {
6163 ExceptionSpecificationType EST =
6164 static_cast<ExceptionSpecificationType>(Record[Idx++]);
6166 if (EST == EST_Dynamic) {
6167 for (unsigned I = 0, N = Record[Idx++]; I != N; ++I)
6168 Exceptions.push_back(readType(ModuleFile, Record, Idx));
6169 ESI.Exceptions = Exceptions;
6170 } else if (EST == EST_ComputedNoexcept) {
6171 ESI.NoexceptExpr = ReadExpr(ModuleFile);
6172 } else if (EST == EST_Uninstantiated) {
6173 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6174 ESI.SourceTemplate = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6175 } else if (EST == EST_Unevaluated) {
6176 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6180 class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> {
6183 const ASTReader::RecordData &Record;
6186 SourceLocation ReadSourceLocation() {
6187 return Reader->ReadSourceLocation(*F, Record, Idx);
6190 TypeSourceInfo *GetTypeSourceInfo() {
6191 return Reader->GetTypeSourceInfo(*F, Record, Idx);
6194 NestedNameSpecifierLoc ReadNestedNameSpecifierLoc() {
6195 return Reader->ReadNestedNameSpecifierLoc(*F, Record, Idx);
6199 TypeLocReader(ModuleFile &F, ASTReader &Reader,
6200 const ASTReader::RecordData &Record, unsigned &Idx)
6201 : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
6203 // We want compile-time assurance that we've enumerated all of
6204 // these, so unfortunately we have to declare them first, then
6205 // define them out-of-line.
6206 #define ABSTRACT_TYPELOC(CLASS, PARENT)
6207 #define TYPELOC(CLASS, PARENT) \
6208 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
6209 #include "clang/AST/TypeLocNodes.def"
6211 void VisitFunctionTypeLoc(FunctionTypeLoc);
6212 void VisitArrayTypeLoc(ArrayTypeLoc);
6215 void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
6219 void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
6220 TL.setBuiltinLoc(ReadSourceLocation());
6221 if (TL.needsExtraLocalData()) {
6222 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++]));
6223 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++]));
6224 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++]));
6225 TL.setModeAttr(Record[Idx++]);
6229 void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
6230 TL.setNameLoc(ReadSourceLocation());
6233 void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
6234 TL.setStarLoc(ReadSourceLocation());
6237 void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
6241 void TypeLocReader::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
6245 void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
6246 TL.setCaretLoc(ReadSourceLocation());
6249 void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
6250 TL.setAmpLoc(ReadSourceLocation());
6253 void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
6254 TL.setAmpAmpLoc(ReadSourceLocation());
6257 void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
6258 TL.setStarLoc(ReadSourceLocation());
6259 TL.setClassTInfo(GetTypeSourceInfo());
6262 void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
6263 TL.setLBracketLoc(ReadSourceLocation());
6264 TL.setRBracketLoc(ReadSourceLocation());
6266 TL.setSizeExpr(Reader->ReadExpr(*F));
6268 TL.setSizeExpr(nullptr);
6271 void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
6272 VisitArrayTypeLoc(TL);
6275 void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
6276 VisitArrayTypeLoc(TL);
6279 void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
6280 VisitArrayTypeLoc(TL);
6283 void TypeLocReader::VisitDependentSizedArrayTypeLoc(
6284 DependentSizedArrayTypeLoc TL) {
6285 VisitArrayTypeLoc(TL);
6288 void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
6289 DependentSizedExtVectorTypeLoc TL) {
6290 TL.setNameLoc(ReadSourceLocation());
6293 void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
6294 TL.setNameLoc(ReadSourceLocation());
6297 void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
6298 TL.setNameLoc(ReadSourceLocation());
6301 void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
6302 TL.setLocalRangeBegin(ReadSourceLocation());
6303 TL.setLParenLoc(ReadSourceLocation());
6304 TL.setRParenLoc(ReadSourceLocation());
6305 TL.setExceptionSpecRange(SourceRange(Reader->ReadSourceLocation(*F, Record, Idx),
6306 Reader->ReadSourceLocation(*F, Record, Idx)));
6307 TL.setLocalRangeEnd(ReadSourceLocation());
6308 for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i) {
6309 TL.setParam(i, Reader->ReadDeclAs<ParmVarDecl>(*F, Record, Idx));
6313 void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
6314 VisitFunctionTypeLoc(TL);
6317 void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
6318 VisitFunctionTypeLoc(TL);
6320 void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
6321 TL.setNameLoc(ReadSourceLocation());
6323 void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
6324 TL.setNameLoc(ReadSourceLocation());
6326 void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
6327 TL.setTypeofLoc(ReadSourceLocation());
6328 TL.setLParenLoc(ReadSourceLocation());
6329 TL.setRParenLoc(ReadSourceLocation());
6331 void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
6332 TL.setTypeofLoc(ReadSourceLocation());
6333 TL.setLParenLoc(ReadSourceLocation());
6334 TL.setRParenLoc(ReadSourceLocation());
6335 TL.setUnderlyingTInfo(GetTypeSourceInfo());
6337 void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
6338 TL.setNameLoc(ReadSourceLocation());
6341 void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
6342 TL.setKWLoc(ReadSourceLocation());
6343 TL.setLParenLoc(ReadSourceLocation());
6344 TL.setRParenLoc(ReadSourceLocation());
6345 TL.setUnderlyingTInfo(GetTypeSourceInfo());
6348 void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) {
6349 TL.setNameLoc(ReadSourceLocation());
6352 void TypeLocReader::VisitDeducedTemplateSpecializationTypeLoc(
6353 DeducedTemplateSpecializationTypeLoc TL) {
6354 TL.setTemplateNameLoc(ReadSourceLocation());
6357 void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
6358 TL.setNameLoc(ReadSourceLocation());
6361 void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
6362 TL.setNameLoc(ReadSourceLocation());
6365 void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
6366 TL.setAttrNameLoc(ReadSourceLocation());
6367 if (TL.hasAttrOperand()) {
6369 range.setBegin(ReadSourceLocation());
6370 range.setEnd(ReadSourceLocation());
6371 TL.setAttrOperandParensRange(range);
6373 if (TL.hasAttrExprOperand()) {
6375 TL.setAttrExprOperand(Reader->ReadExpr(*F));
6377 TL.setAttrExprOperand(nullptr);
6378 } else if (TL.hasAttrEnumOperand())
6379 TL.setAttrEnumOperandLoc(ReadSourceLocation());
6382 void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
6383 TL.setNameLoc(ReadSourceLocation());
6386 void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
6387 SubstTemplateTypeParmTypeLoc TL) {
6388 TL.setNameLoc(ReadSourceLocation());
6390 void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc(
6391 SubstTemplateTypeParmPackTypeLoc TL) {
6392 TL.setNameLoc(ReadSourceLocation());
6394 void TypeLocReader::VisitTemplateSpecializationTypeLoc(
6395 TemplateSpecializationTypeLoc TL) {
6396 TL.setTemplateKeywordLoc(ReadSourceLocation());
6397 TL.setTemplateNameLoc(ReadSourceLocation());
6398 TL.setLAngleLoc(ReadSourceLocation());
6399 TL.setRAngleLoc(ReadSourceLocation());
6400 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
6403 Reader->GetTemplateArgumentLocInfo(
6404 *F, TL.getTypePtr()->getArg(i).getKind(), Record, Idx));
6406 void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) {
6407 TL.setLParenLoc(ReadSourceLocation());
6408 TL.setRParenLoc(ReadSourceLocation());
6411 void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
6412 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6413 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6416 void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
6417 TL.setNameLoc(ReadSourceLocation());
6420 void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
6421 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6422 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6423 TL.setNameLoc(ReadSourceLocation());
6426 void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
6427 DependentTemplateSpecializationTypeLoc TL) {
6428 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6429 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6430 TL.setTemplateKeywordLoc(ReadSourceLocation());
6431 TL.setTemplateNameLoc(ReadSourceLocation());
6432 TL.setLAngleLoc(ReadSourceLocation());
6433 TL.setRAngleLoc(ReadSourceLocation());
6434 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
6437 Reader->GetTemplateArgumentLocInfo(
6438 *F, TL.getTypePtr()->getArg(I).getKind(), Record, Idx));
6441 void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
6442 TL.setEllipsisLoc(ReadSourceLocation());
6445 void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
6446 TL.setNameLoc(ReadSourceLocation());
6449 void TypeLocReader::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
6450 if (TL.getNumProtocols()) {
6451 TL.setProtocolLAngleLoc(ReadSourceLocation());
6452 TL.setProtocolRAngleLoc(ReadSourceLocation());
6454 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
6455 TL.setProtocolLoc(i, ReadSourceLocation());
6458 void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
6459 TL.setHasBaseTypeAsWritten(Record[Idx++]);
6460 TL.setTypeArgsLAngleLoc(ReadSourceLocation());
6461 TL.setTypeArgsRAngleLoc(ReadSourceLocation());
6462 for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
6463 TL.setTypeArgTInfo(i, GetTypeSourceInfo());
6464 TL.setProtocolLAngleLoc(ReadSourceLocation());
6465 TL.setProtocolRAngleLoc(ReadSourceLocation());
6466 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
6467 TL.setProtocolLoc(i, ReadSourceLocation());
6470 void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
6471 TL.setStarLoc(ReadSourceLocation());
6474 void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
6475 TL.setKWLoc(ReadSourceLocation());
6476 TL.setLParenLoc(ReadSourceLocation());
6477 TL.setRParenLoc(ReadSourceLocation());
6480 void TypeLocReader::VisitPipeTypeLoc(PipeTypeLoc TL) {
6481 TL.setKWLoc(ReadSourceLocation());
6485 ASTReader::GetTypeSourceInfo(ModuleFile &F, const ASTReader::RecordData &Record,
6487 QualType InfoTy = readType(F, Record, Idx);
6488 if (InfoTy.isNull())
6491 TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy);
6492 TypeLocReader TLR(F, *this, Record, Idx);
6493 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc())
6498 QualType ASTReader::GetType(TypeID ID) {
6499 unsigned FastQuals = ID & Qualifiers::FastMask;
6500 unsigned Index = ID >> Qualifiers::FastWidth;
6502 if (Index < NUM_PREDEF_TYPE_IDS) {
6504 switch ((PredefinedTypeIDs)Index) {
6505 case PREDEF_TYPE_NULL_ID:
6507 case PREDEF_TYPE_VOID_ID:
6510 case PREDEF_TYPE_BOOL_ID:
6514 case PREDEF_TYPE_CHAR_U_ID:
6515 case PREDEF_TYPE_CHAR_S_ID:
6516 // FIXME: Check that the signedness of CharTy is correct!
6520 case PREDEF_TYPE_UCHAR_ID:
6521 T = Context.UnsignedCharTy;
6523 case PREDEF_TYPE_USHORT_ID:
6524 T = Context.UnsignedShortTy;
6526 case PREDEF_TYPE_UINT_ID:
6527 T = Context.UnsignedIntTy;
6529 case PREDEF_TYPE_ULONG_ID:
6530 T = Context.UnsignedLongTy;
6532 case PREDEF_TYPE_ULONGLONG_ID:
6533 T = Context.UnsignedLongLongTy;
6535 case PREDEF_TYPE_UINT128_ID:
6536 T = Context.UnsignedInt128Ty;
6538 case PREDEF_TYPE_SCHAR_ID:
6539 T = Context.SignedCharTy;
6541 case PREDEF_TYPE_WCHAR_ID:
6542 T = Context.WCharTy;
6544 case PREDEF_TYPE_SHORT_ID:
6545 T = Context.ShortTy;
6547 case PREDEF_TYPE_INT_ID:
6550 case PREDEF_TYPE_LONG_ID:
6553 case PREDEF_TYPE_LONGLONG_ID:
6554 T = Context.LongLongTy;
6556 case PREDEF_TYPE_INT128_ID:
6557 T = Context.Int128Ty;
6559 case PREDEF_TYPE_HALF_ID:
6562 case PREDEF_TYPE_FLOAT_ID:
6563 T = Context.FloatTy;
6565 case PREDEF_TYPE_DOUBLE_ID:
6566 T = Context.DoubleTy;
6568 case PREDEF_TYPE_LONGDOUBLE_ID:
6569 T = Context.LongDoubleTy;
6571 case PREDEF_TYPE_FLOAT128_ID:
6572 T = Context.Float128Ty;
6574 case PREDEF_TYPE_OVERLOAD_ID:
6575 T = Context.OverloadTy;
6577 case PREDEF_TYPE_BOUND_MEMBER:
6578 T = Context.BoundMemberTy;
6580 case PREDEF_TYPE_PSEUDO_OBJECT:
6581 T = Context.PseudoObjectTy;
6583 case PREDEF_TYPE_DEPENDENT_ID:
6584 T = Context.DependentTy;
6586 case PREDEF_TYPE_UNKNOWN_ANY:
6587 T = Context.UnknownAnyTy;
6589 case PREDEF_TYPE_NULLPTR_ID:
6590 T = Context.NullPtrTy;
6592 case PREDEF_TYPE_CHAR16_ID:
6593 T = Context.Char16Ty;
6595 case PREDEF_TYPE_CHAR32_ID:
6596 T = Context.Char32Ty;
6598 case PREDEF_TYPE_OBJC_ID:
6599 T = Context.ObjCBuiltinIdTy;
6601 case PREDEF_TYPE_OBJC_CLASS:
6602 T = Context.ObjCBuiltinClassTy;
6604 case PREDEF_TYPE_OBJC_SEL:
6605 T = Context.ObjCBuiltinSelTy;
6607 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
6608 case PREDEF_TYPE_##Id##_ID: \
6609 T = Context.SingletonId; \
6611 #include "clang/Basic/OpenCLImageTypes.def"
6612 case PREDEF_TYPE_SAMPLER_ID:
6613 T = Context.OCLSamplerTy;
6615 case PREDEF_TYPE_EVENT_ID:
6616 T = Context.OCLEventTy;
6618 case PREDEF_TYPE_CLK_EVENT_ID:
6619 T = Context.OCLClkEventTy;
6621 case PREDEF_TYPE_QUEUE_ID:
6622 T = Context.OCLQueueTy;
6624 case PREDEF_TYPE_RESERVE_ID_ID:
6625 T = Context.OCLReserveIDTy;
6627 case PREDEF_TYPE_AUTO_DEDUCT:
6628 T = Context.getAutoDeductType();
6631 case PREDEF_TYPE_AUTO_RREF_DEDUCT:
6632 T = Context.getAutoRRefDeductType();
6635 case PREDEF_TYPE_ARC_UNBRIDGED_CAST:
6636 T = Context.ARCUnbridgedCastTy;
6639 case PREDEF_TYPE_BUILTIN_FN:
6640 T = Context.BuiltinFnTy;
6643 case PREDEF_TYPE_OMP_ARRAY_SECTION:
6644 T = Context.OMPArraySectionTy;
6648 assert(!T.isNull() && "Unknown predefined type");
6649 return T.withFastQualifiers(FastQuals);
6652 Index -= NUM_PREDEF_TYPE_IDS;
6653 assert(Index < TypesLoaded.size() && "Type index out-of-range");
6654 if (TypesLoaded[Index].isNull()) {
6655 TypesLoaded[Index] = readTypeRecord(Index);
6656 if (TypesLoaded[Index].isNull())
6659 TypesLoaded[Index]->setFromAST();
6660 if (DeserializationListener)
6661 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID),
6662 TypesLoaded[Index]);
6665 return TypesLoaded[Index].withFastQualifiers(FastQuals);
6668 QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
6669 return GetType(getGlobalTypeID(F, LocalID));
6672 serialization::TypeID
6673 ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
6674 unsigned FastQuals = LocalID & Qualifiers::FastMask;
6675 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;
6677 if (LocalIndex < NUM_PREDEF_TYPE_IDS)
6680 if (!F.ModuleOffsetMap.empty())
6681 ReadModuleOffsetMap(F);
6683 ContinuousRangeMap<uint32_t, int, 2>::iterator I
6684 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS);
6685 assert(I != F.TypeRemap.end() && "Invalid index into type index remap");
6687 unsigned GlobalIndex = LocalIndex + I->second;
6688 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
6691 TemplateArgumentLocInfo
6692 ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F,
6693 TemplateArgument::ArgKind Kind,
6694 const RecordData &Record,
6697 case TemplateArgument::Expression:
6699 case TemplateArgument::Type:
6700 return GetTypeSourceInfo(F, Record, Index);
6701 case TemplateArgument::Template: {
6702 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6704 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6705 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6708 case TemplateArgument::TemplateExpansion: {
6709 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6711 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6712 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index);
6713 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6716 case TemplateArgument::Null:
6717 case TemplateArgument::Integral:
6718 case TemplateArgument::Declaration:
6719 case TemplateArgument::NullPtr:
6720 case TemplateArgument::Pack:
6721 // FIXME: Is this right?
6722 return TemplateArgumentLocInfo();
6724 llvm_unreachable("unexpected template argument loc");
6728 ASTReader::ReadTemplateArgumentLoc(ModuleFile &F,
6729 const RecordData &Record, unsigned &Index) {
6730 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index);
6732 if (Arg.getKind() == TemplateArgument::Expression) {
6733 if (Record[Index++]) // bool InfoHasSameExpr.
6734 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
6736 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(),
6740 const ASTTemplateArgumentListInfo*
6741 ASTReader::ReadASTTemplateArgumentListInfo(ModuleFile &F,
6742 const RecordData &Record,
6744 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Index);
6745 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Index);
6746 unsigned NumArgsAsWritten = Record[Index++];
6747 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
6748 for (unsigned i = 0; i != NumArgsAsWritten; ++i)
6749 TemplArgsInfo.addArgument(ReadTemplateArgumentLoc(F, Record, Index));
6750 return ASTTemplateArgumentListInfo::Create(getContext(), TemplArgsInfo);
6753 Decl *ASTReader::GetExternalDecl(uint32_t ID) {
6757 void ASTReader::CompleteRedeclChain(const Decl *D) {
6758 if (NumCurrentElementsDeserializing) {
6759 // We arrange to not care about the complete redeclaration chain while we're
6760 // deserializing. Just remember that the AST has marked this one as complete
6761 // but that it's not actually complete yet, so we know we still need to
6762 // complete it later.
6763 PendingIncompleteDeclChains.push_back(const_cast<Decl*>(D));
6767 const DeclContext *DC = D->getDeclContext()->getRedeclContext();
6769 // If this is a named declaration, complete it by looking it up
6770 // within its context.
6772 // FIXME: Merging a function definition should merge
6773 // all mergeable entities within it.
6774 if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC) ||
6775 isa<CXXRecordDecl>(DC) || isa<EnumDecl>(DC)) {
6776 if (DeclarationName Name = cast<NamedDecl>(D)->getDeclName()) {
6777 if (!getContext().getLangOpts().CPlusPlus &&
6778 isa<TranslationUnitDecl>(DC)) {
6779 // Outside of C++, we don't have a lookup table for the TU, so update
6780 // the identifier instead. (For C++ modules, we don't store decls
6781 // in the serialized identifier table, so we do the lookup in the TU.)
6782 auto *II = Name.getAsIdentifierInfo();
6783 assert(II && "non-identifier name in C?");
6784 if (II->isOutOfDate())
6785 updateOutOfDateIdentifier(*II);
6788 } else if (needsAnonymousDeclarationNumber(cast<NamedDecl>(D))) {
6789 // Find all declarations of this kind from the relevant context.
6790 for (auto *DCDecl : cast<Decl>(D->getLexicalDeclContext())->redecls()) {
6791 auto *DC = cast<DeclContext>(DCDecl);
6792 SmallVector<Decl*, 8> Decls;
6793 FindExternalLexicalDecls(
6794 DC, [&](Decl::Kind K) { return K == D->getKind(); }, Decls);
6799 if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D))
6800 CTSD->getSpecializedTemplate()->LoadLazySpecializations();
6801 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D))
6802 VTSD->getSpecializedTemplate()->LoadLazySpecializations();
6803 if (auto *FD = dyn_cast<FunctionDecl>(D)) {
6804 if (auto *Template = FD->getPrimaryTemplate())
6805 Template->LoadLazySpecializations();
6809 CXXCtorInitializer **
6810 ASTReader::GetExternalCXXCtorInitializers(uint64_t Offset) {
6811 RecordLocation Loc = getLocalBitOffset(Offset);
6812 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
6813 SavedStreamPosition SavedPosition(Cursor);
6814 Cursor.JumpToBit(Loc.Offset);
6815 ReadingKindTracker ReadingKind(Read_Decl, *this);
6818 unsigned Code = Cursor.ReadCode();
6819 unsigned RecCode = Cursor.readRecord(Code, Record);
6820 if (RecCode != DECL_CXX_CTOR_INITIALIZERS) {
6821 Error("malformed AST file: missing C++ ctor initializers");
6826 return ReadCXXCtorInitializers(*Loc.F, Record, Idx);
6829 CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
6830 RecordLocation Loc = getLocalBitOffset(Offset);
6831 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
6832 SavedStreamPosition SavedPosition(Cursor);
6833 Cursor.JumpToBit(Loc.Offset);
6834 ReadingKindTracker ReadingKind(Read_Decl, *this);
6836 unsigned Code = Cursor.ReadCode();
6837 unsigned RecCode = Cursor.readRecord(Code, Record);
6838 if (RecCode != DECL_CXX_BASE_SPECIFIERS) {
6839 Error("malformed AST file: missing C++ base specifiers");
6844 unsigned NumBases = Record[Idx++];
6845 void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases);
6846 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases];
6847 for (unsigned I = 0; I != NumBases; ++I)
6848 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx);
6852 serialization::DeclID
6853 ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const {
6854 if (LocalID < NUM_PREDEF_DECL_IDS)
6857 if (!F.ModuleOffsetMap.empty())
6858 ReadModuleOffsetMap(F);
6860 ContinuousRangeMap<uint32_t, int, 2>::iterator I
6861 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS);
6862 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap");
6864 return LocalID + I->second;
6867 bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID,
6868 ModuleFile &M) const {
6869 // Predefined decls aren't from any module.
6870 if (ID < NUM_PREDEF_DECL_IDS)
6873 return ID - NUM_PREDEF_DECL_IDS >= M.BaseDeclID &&
6874 ID - NUM_PREDEF_DECL_IDS < M.BaseDeclID + M.LocalNumDecls;
6877 ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) {
6878 if (!D->isFromASTFile())
6880 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(D->getGlobalID());
6881 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
6885 SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) {
6886 if (ID < NUM_PREDEF_DECL_IDS)
6887 return SourceLocation();
6889 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
6891 if (Index > DeclsLoaded.size()) {
6892 Error("declaration ID out-of-range for AST file");
6893 return SourceLocation();
6896 if (Decl *D = DeclsLoaded[Index])
6897 return D->getLocation();
6900 DeclCursorForID(ID, Loc);
6904 static Decl *getPredefinedDecl(ASTContext &Context, PredefinedDeclIDs ID) {
6906 case PREDEF_DECL_NULL_ID:
6909 case PREDEF_DECL_TRANSLATION_UNIT_ID:
6910 return Context.getTranslationUnitDecl();
6912 case PREDEF_DECL_OBJC_ID_ID:
6913 return Context.getObjCIdDecl();
6915 case PREDEF_DECL_OBJC_SEL_ID:
6916 return Context.getObjCSelDecl();
6918 case PREDEF_DECL_OBJC_CLASS_ID:
6919 return Context.getObjCClassDecl();
6921 case PREDEF_DECL_OBJC_PROTOCOL_ID:
6922 return Context.getObjCProtocolDecl();
6924 case PREDEF_DECL_INT_128_ID:
6925 return Context.getInt128Decl();
6927 case PREDEF_DECL_UNSIGNED_INT_128_ID:
6928 return Context.getUInt128Decl();
6930 case PREDEF_DECL_OBJC_INSTANCETYPE_ID:
6931 return Context.getObjCInstanceTypeDecl();
6933 case PREDEF_DECL_BUILTIN_VA_LIST_ID:
6934 return Context.getBuiltinVaListDecl();
6936 case PREDEF_DECL_VA_LIST_TAG:
6937 return Context.getVaListTagDecl();
6939 case PREDEF_DECL_BUILTIN_MS_VA_LIST_ID:
6940 return Context.getBuiltinMSVaListDecl();
6942 case PREDEF_DECL_EXTERN_C_CONTEXT_ID:
6943 return Context.getExternCContextDecl();
6945 case PREDEF_DECL_MAKE_INTEGER_SEQ_ID:
6946 return Context.getMakeIntegerSeqDecl();
6948 case PREDEF_DECL_CF_CONSTANT_STRING_ID:
6949 return Context.getCFConstantStringDecl();
6951 case PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID:
6952 return Context.getCFConstantStringTagDecl();
6954 case PREDEF_DECL_TYPE_PACK_ELEMENT_ID:
6955 return Context.getTypePackElementDecl();
6957 llvm_unreachable("PredefinedDeclIDs unknown enum value");
6960 Decl *ASTReader::GetExistingDecl(DeclID ID) {
6961 if (ID < NUM_PREDEF_DECL_IDS) {
6962 Decl *D = getPredefinedDecl(Context, (PredefinedDeclIDs)ID);
6964 // Track that we have merged the declaration with ID \p ID into the
6965 // pre-existing predefined declaration \p D.
6966 auto &Merged = KeyDecls[D->getCanonicalDecl()];
6968 Merged.push_back(ID);
6973 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
6975 if (Index >= DeclsLoaded.size()) {
6976 assert(0 && "declaration ID out-of-range for AST file");
6977 Error("declaration ID out-of-range for AST file");
6981 return DeclsLoaded[Index];
6984 Decl *ASTReader::GetDecl(DeclID ID) {
6985 if (ID < NUM_PREDEF_DECL_IDS)
6986 return GetExistingDecl(ID);
6988 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
6990 if (Index >= DeclsLoaded.size()) {
6991 assert(0 && "declaration ID out-of-range for AST file");
6992 Error("declaration ID out-of-range for AST file");
6996 if (!DeclsLoaded[Index]) {
6998 if (DeserializationListener)
6999 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);
7002 return DeclsLoaded[Index];
7005 DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
7007 if (GlobalID < NUM_PREDEF_DECL_IDS)
7010 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(GlobalID);
7011 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
7012 ModuleFile *Owner = I->second;
7014 llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos
7015 = M.GlobalToLocalDeclIDs.find(Owner);
7016 if (Pos == M.GlobalToLocalDeclIDs.end())
7019 return GlobalID - Owner->BaseDeclID + Pos->second;
7022 serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F,
7023 const RecordData &Record,
7025 if (Idx >= Record.size()) {
7026 Error("Corrupted AST file");
7030 return getGlobalDeclID(F, Record[Idx++]);
7033 /// \brief Resolve the offset of a statement into a statement.
7035 /// This operation will read a new statement from the external
7036 /// source each time it is called, and is meant to be used via a
7037 /// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
7038 Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) {
7039 // Switch case IDs are per Decl.
7040 ClearSwitchCaseIDs();
7042 // Offset here is a global offset across the entire chain.
7043 RecordLocation Loc = getLocalBitOffset(Offset);
7044 Loc.F->DeclsCursor.JumpToBit(Loc.Offset);
7045 assert(NumCurrentElementsDeserializing == 0 &&
7046 "should not be called while already deserializing");
7047 Deserializing D(this);
7048 return ReadStmtFromStream(*Loc.F);
7051 void ASTReader::FindExternalLexicalDecls(
7052 const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
7053 SmallVectorImpl<Decl *> &Decls) {
7054 bool PredefsVisited[NUM_PREDEF_DECL_IDS] = {};
7056 auto Visit = [&] (ModuleFile *M, LexicalContents LexicalDecls) {
7057 assert(LexicalDecls.size() % 2 == 0 && "expected an even number of entries");
7058 for (int I = 0, N = LexicalDecls.size(); I != N; I += 2) {
7059 auto K = (Decl::Kind)+LexicalDecls[I];
7060 if (!IsKindWeWant(K))
7063 auto ID = (serialization::DeclID)+LexicalDecls[I + 1];
7065 // Don't add predefined declarations to the lexical context more
7067 if (ID < NUM_PREDEF_DECL_IDS) {
7068 if (PredefsVisited[ID])
7071 PredefsVisited[ID] = true;
7074 if (Decl *D = GetLocalDecl(*M, ID)) {
7075 assert(D->getKind() == K && "wrong kind for lexical decl");
7076 if (!DC->isDeclInLexicalTraversal(D))
7082 if (isa<TranslationUnitDecl>(DC)) {
7083 for (auto Lexical : TULexicalDecls)
7084 Visit(Lexical.first, Lexical.second);
7086 auto I = LexicalDecls.find(DC);
7087 if (I != LexicalDecls.end())
7088 Visit(I->second.first, I->second.second);
7091 ++NumLexicalDeclContextsRead;
7101 DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {}
7103 bool operator()(LocalDeclID L, LocalDeclID R) const {
7104 SourceLocation LHS = getLocation(L);
7105 SourceLocation RHS = getLocation(R);
7106 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7109 bool operator()(SourceLocation LHS, LocalDeclID R) const {
7110 SourceLocation RHS = getLocation(R);
7111 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7114 bool operator()(LocalDeclID L, SourceLocation RHS) const {
7115 SourceLocation LHS = getLocation(L);
7116 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7119 SourceLocation getLocation(LocalDeclID ID) const {
7120 return Reader.getSourceManager().getFileLoc(
7121 Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID)));
7125 } // end anonymous namespace
7127 void ASTReader::FindFileRegionDecls(FileID File,
7128 unsigned Offset, unsigned Length,
7129 SmallVectorImpl<Decl *> &Decls) {
7130 SourceManager &SM = getSourceManager();
7132 llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File);
7133 if (I == FileDeclIDs.end())
7136 FileDeclsInfo &DInfo = I->second;
7137 if (DInfo.Decls.empty())
7141 BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset);
7142 SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length);
7144 DeclIDComp DIDComp(*this, *DInfo.Mod);
7145 ArrayRef<serialization::LocalDeclID>::iterator
7146 BeginIt = std::lower_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
7148 if (BeginIt != DInfo.Decls.begin())
7151 // If we are pointing at a top-level decl inside an objc container, we need
7152 // to backtrack until we find it otherwise we will fail to report that the
7153 // region overlaps with an objc container.
7154 while (BeginIt != DInfo.Decls.begin() &&
7155 GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt))
7156 ->isTopLevelDeclInObjCContainer())
7159 ArrayRef<serialization::LocalDeclID>::iterator
7160 EndIt = std::upper_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
7162 if (EndIt != DInfo.Decls.end())
7165 for (ArrayRef<serialization::LocalDeclID>::iterator
7166 DIt = BeginIt; DIt != EndIt; ++DIt)
7167 Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt)));
7171 ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
7172 DeclarationName Name) {
7173 assert(DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() &&
7174 "DeclContext has no visible decls in storage");
7178 auto It = Lookups.find(DC);
7179 if (It == Lookups.end())
7182 Deserializing LookupResults(this);
7184 // Load the list of declarations.
7185 SmallVector<NamedDecl *, 64> Decls;
7186 for (DeclID ID : It->second.Table.find(Name)) {
7187 NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
7188 if (ND->getDeclName() == Name)
7189 Decls.push_back(ND);
7192 ++NumVisibleDeclContextsRead;
7193 SetExternalVisibleDeclsForName(DC, Name, Decls);
7194 return !Decls.empty();
7197 void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) {
7198 if (!DC->hasExternalVisibleStorage())
7201 auto It = Lookups.find(DC);
7202 assert(It != Lookups.end() &&
7203 "have external visible storage but no lookup tables");
7207 for (DeclID ID : It->second.Table.findAll()) {
7208 NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
7209 Decls[ND->getDeclName()].push_back(ND);
7212 ++NumVisibleDeclContextsRead;
7214 for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
7215 SetExternalVisibleDeclsForName(DC, I->first, I->second);
7217 const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false);
7220 const serialization::reader::DeclContextLookupTable *
7221 ASTReader::getLoadedLookupTables(DeclContext *Primary) const {
7222 auto I = Lookups.find(Primary);
7223 return I == Lookups.end() ? nullptr : &I->second;
7226 /// \brief Under non-PCH compilation the consumer receives the objc methods
7227 /// before receiving the implementation, and codegen depends on this.
7228 /// We simulate this by deserializing and passing to consumer the methods of the
7229 /// implementation before passing the deserialized implementation decl.
7230 static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD,
7231 ASTConsumer *Consumer) {
7232 assert(ImplD && Consumer);
7234 for (auto *I : ImplD->methods())
7235 Consumer->HandleInterestingDecl(DeclGroupRef(I));
7237 Consumer->HandleInterestingDecl(DeclGroupRef(ImplD));
7240 void ASTReader::PassInterestingDeclToConsumer(Decl *D) {
7241 if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D))
7242 PassObjCImplDeclToConsumer(ImplD, Consumer);
7244 Consumer->HandleInterestingDecl(DeclGroupRef(D));
7247 void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) {
7248 this->Consumer = Consumer;
7251 PassInterestingDeclsToConsumer();
7253 if (DeserializationListener)
7254 DeserializationListener->ReaderInitialized(this);
7257 void ASTReader::PrintStats() {
7258 std::fprintf(stderr, "*** AST File Statistics:\n");
7260 unsigned NumTypesLoaded
7261 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
7263 unsigned NumDeclsLoaded
7264 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
7266 unsigned NumIdentifiersLoaded
7267 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
7268 IdentifiersLoaded.end(),
7269 (IdentifierInfo *)nullptr);
7270 unsigned NumMacrosLoaded
7271 = MacrosLoaded.size() - std::count(MacrosLoaded.begin(),
7273 (MacroInfo *)nullptr);
7274 unsigned NumSelectorsLoaded
7275 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
7276 SelectorsLoaded.end(),
7279 if (unsigned TotalNumSLocEntries = getTotalNumSLocs())
7280 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n",
7281 NumSLocEntriesRead, TotalNumSLocEntries,
7282 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
7283 if (!TypesLoaded.empty())
7284 std::fprintf(stderr, " %u/%u types read (%f%%)\n",
7285 NumTypesLoaded, (unsigned)TypesLoaded.size(),
7286 ((float)NumTypesLoaded/TypesLoaded.size() * 100));
7287 if (!DeclsLoaded.empty())
7288 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n",
7289 NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
7290 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
7291 if (!IdentifiersLoaded.empty())
7292 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n",
7293 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
7294 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
7295 if (!MacrosLoaded.empty())
7296 std::fprintf(stderr, " %u/%u macros read (%f%%)\n",
7297 NumMacrosLoaded, (unsigned)MacrosLoaded.size(),
7298 ((float)NumMacrosLoaded/MacrosLoaded.size() * 100));
7299 if (!SelectorsLoaded.empty())
7300 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n",
7301 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
7302 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
7303 if (TotalNumStatements)
7304 std::fprintf(stderr, " %u/%u statements read (%f%%)\n",
7305 NumStatementsRead, TotalNumStatements,
7306 ((float)NumStatementsRead/TotalNumStatements * 100));
7308 std::fprintf(stderr, " %u/%u macros read (%f%%)\n",
7309 NumMacrosRead, TotalNumMacros,
7310 ((float)NumMacrosRead/TotalNumMacros * 100));
7311 if (TotalLexicalDeclContexts)
7312 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n",
7313 NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
7314 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
7316 if (TotalVisibleDeclContexts)
7317 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n",
7318 NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
7319 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
7321 if (TotalNumMethodPoolEntries) {
7322 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n",
7323 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
7324 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
7327 if (NumMethodPoolLookups) {
7328 std::fprintf(stderr, " %u/%u method pool lookups succeeded (%f%%)\n",
7329 NumMethodPoolHits, NumMethodPoolLookups,
7330 ((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0));
7332 if (NumMethodPoolTableLookups) {
7333 std::fprintf(stderr, " %u/%u method pool table lookups succeeded (%f%%)\n",
7334 NumMethodPoolTableHits, NumMethodPoolTableLookups,
7335 ((float)NumMethodPoolTableHits/NumMethodPoolTableLookups
7339 if (NumIdentifierLookupHits) {
7340 std::fprintf(stderr,
7341 " %u / %u identifier table lookups succeeded (%f%%)\n",
7342 NumIdentifierLookupHits, NumIdentifierLookups,
7343 (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
7347 std::fprintf(stderr, "\n");
7348 GlobalIndex->printStats();
7351 std::fprintf(stderr, "\n");
7353 std::fprintf(stderr, "\n");
7356 template<typename Key, typename ModuleFile, unsigned InitialCapacity>
7357 LLVM_DUMP_METHOD static void
7358 dumpModuleIDMap(StringRef Name,
7359 const ContinuousRangeMap<Key, ModuleFile *,
7360 InitialCapacity> &Map) {
7361 if (Map.begin() == Map.end())
7364 typedef ContinuousRangeMap<Key, ModuleFile *, InitialCapacity> MapType;
7365 llvm::errs() << Name << ":\n";
7366 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
7368 llvm::errs() << " " << I->first << " -> " << I->second->FileName
7373 LLVM_DUMP_METHOD void ASTReader::dump() {
7374 llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
7375 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap);
7376 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap);
7377 dumpModuleIDMap("Global type map", GlobalTypeMap);
7378 dumpModuleIDMap("Global declaration map", GlobalDeclMap);
7379 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap);
7380 dumpModuleIDMap("Global macro map", GlobalMacroMap);
7381 dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap);
7382 dumpModuleIDMap("Global selector map", GlobalSelectorMap);
7383 dumpModuleIDMap("Global preprocessed entity map",
7384 GlobalPreprocessedEntityMap);
7386 llvm::errs() << "\n*** PCH/Modules Loaded:";
7387 for (ModuleFile &M : ModuleMgr)
7391 /// Return the amount of memory used by memory buffers, breaking down
7392 /// by heap-backed versus mmap'ed memory.
7393 void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
7394 for (ModuleFile &I : ModuleMgr) {
7395 if (llvm::MemoryBuffer *buf = I.Buffer) {
7396 size_t bytes = buf->getBufferSize();
7397 switch (buf->getBufferKind()) {
7398 case llvm::MemoryBuffer::MemoryBuffer_Malloc:
7399 sizes.malloc_bytes += bytes;
7401 case llvm::MemoryBuffer::MemoryBuffer_MMap:
7402 sizes.mmap_bytes += bytes;
7409 void ASTReader::InitializeSema(Sema &S) {
7411 S.addExternalSource(this);
7413 // Makes sure any declarations that were deserialized "too early"
7414 // still get added to the identifier's declaration chains.
7415 for (uint64_t ID : PreloadedDeclIDs) {
7416 NamedDecl *D = cast<NamedDecl>(GetDecl(ID));
7417 pushExternalDeclIntoScope(D, D->getDeclName());
7419 PreloadedDeclIDs.clear();
7421 // FIXME: What happens if these are changed by a module import?
7422 if (!FPPragmaOptions.empty()) {
7423 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS");
7424 SemaObj->FPFeatures = FPOptions(FPPragmaOptions[0]);
7427 SemaObj->OpenCLFeatures.copy(OpenCLExtensions);
7428 SemaObj->OpenCLTypeExtMap = OpenCLTypeExtMap;
7429 SemaObj->OpenCLDeclExtMap = OpenCLDeclExtMap;
7434 void ASTReader::UpdateSema() {
7435 assert(SemaObj && "no Sema to update");
7437 // Load the offsets of the declarations that Sema references.
7438 // They will be lazily deserialized when needed.
7439 if (!SemaDeclRefs.empty()) {
7440 assert(SemaDeclRefs.size() % 3 == 0);
7441 for (unsigned I = 0; I != SemaDeclRefs.size(); I += 3) {
7442 if (!SemaObj->StdNamespace)
7443 SemaObj->StdNamespace = SemaDeclRefs[I];
7444 if (!SemaObj->StdBadAlloc)
7445 SemaObj->StdBadAlloc = SemaDeclRefs[I+1];
7446 if (!SemaObj->StdAlignValT)
7447 SemaObj->StdAlignValT = SemaDeclRefs[I+2];
7449 SemaDeclRefs.clear();
7452 // Update the state of pragmas. Use the same API as if we had encountered the
7453 // pragma in the source.
7454 if(OptimizeOffPragmaLocation.isValid())
7455 SemaObj->ActOnPragmaOptimize(/* IsOn = */ false, OptimizeOffPragmaLocation);
7456 if (PragmaMSStructState != -1)
7457 SemaObj->ActOnPragmaMSStruct((PragmaMSStructKind)PragmaMSStructState);
7458 if (PointersToMembersPragmaLocation.isValid()) {
7459 SemaObj->ActOnPragmaMSPointersToMembers(
7460 (LangOptions::PragmaMSPointersToMembersKind)
7461 PragmaMSPointersToMembersState,
7462 PointersToMembersPragmaLocation);
7464 SemaObj->ForceCUDAHostDeviceDepth = ForceCUDAHostDeviceDepth;
7466 if (PragmaPackCurrentValue) {
7467 // The bottom of the stack might have a default value. It must be adjusted
7468 // to the current value to ensure that the packing state is preserved after
7469 // popping entries that were included/imported from a PCH/module.
7470 bool DropFirst = false;
7471 if (!PragmaPackStack.empty() &&
7472 PragmaPackStack.front().Location.isInvalid()) {
7473 assert(PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue &&
7474 "Expected a default alignment value");
7475 SemaObj->PackStack.Stack.emplace_back(
7476 PragmaPackStack.front().SlotLabel, SemaObj->PackStack.CurrentValue,
7477 SemaObj->PackStack.CurrentPragmaLocation);
7480 for (const auto &Entry :
7481 llvm::makeArrayRef(PragmaPackStack).drop_front(DropFirst ? 1 : 0))
7482 SemaObj->PackStack.Stack.emplace_back(Entry.SlotLabel, Entry.Value,
7484 if (PragmaPackCurrentLocation.isInvalid()) {
7485 assert(*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue &&
7486 "Expected a default alignment value");
7487 // Keep the current values.
7489 SemaObj->PackStack.CurrentValue = *PragmaPackCurrentValue;
7490 SemaObj->PackStack.CurrentPragmaLocation = PragmaPackCurrentLocation;
7495 IdentifierInfo *ASTReader::get(StringRef Name) {
7496 // Note that we are loading an identifier.
7497 Deserializing AnIdentifier(this);
7499 IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
7500 NumIdentifierLookups,
7501 NumIdentifierLookupHits);
7503 // We don't need to do identifier table lookups in C++ modules (we preload
7504 // all interesting declarations, and don't need to use the scope for name
7505 // lookups). Perform the lookup in PCH files, though, since we don't build
7506 // a complete initial identifier table if we're carrying on from a PCH.
7507 if (Context.getLangOpts().CPlusPlus) {
7508 for (auto F : ModuleMgr.pch_modules())
7512 // If there is a global index, look there first to determine which modules
7513 // provably do not have any results for this identifier.
7514 GlobalModuleIndex::HitSet Hits;
7515 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
7516 if (!loadGlobalIndex()) {
7517 if (GlobalIndex->lookupIdentifier(Name, Hits)) {
7522 ModuleMgr.visit(Visitor, HitsPtr);
7525 IdentifierInfo *II = Visitor.getIdentifierInfo();
7526 markIdentifierUpToDate(II);
7532 /// \brief An identifier-lookup iterator that enumerates all of the
7533 /// identifiers stored within a set of AST files.
7534 class ASTIdentifierIterator : public IdentifierIterator {
7535 /// \brief The AST reader whose identifiers are being enumerated.
7536 const ASTReader &Reader;
7538 /// \brief The current index into the chain of AST files stored in
7542 /// \brief The current position within the identifier lookup table
7543 /// of the current AST file.
7544 ASTIdentifierLookupTable::key_iterator Current;
7546 /// \brief The end position within the identifier lookup table of
7547 /// the current AST file.
7548 ASTIdentifierLookupTable::key_iterator End;
7550 /// \brief Whether to skip any modules in the ASTReader.
7554 explicit ASTIdentifierIterator(const ASTReader &Reader,
7555 bool SkipModules = false);
7557 StringRef Next() override;
7560 } // end namespace clang
7562 ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader,
7564 : Reader(Reader), Index(Reader.ModuleMgr.size()), SkipModules(SkipModules) {
7567 StringRef ASTIdentifierIterator::Next() {
7568 while (Current == End) {
7569 // If we have exhausted all of our AST files, we're done.
7574 ModuleFile &F = Reader.ModuleMgr[Index];
7575 if (SkipModules && F.isModule())
7578 ASTIdentifierLookupTable *IdTable =
7579 (ASTIdentifierLookupTable *)F.IdentifierLookupTable;
7580 Current = IdTable->key_begin();
7581 End = IdTable->key_end();
7584 // We have any identifiers remaining in the current AST file; return
7586 StringRef Result = *Current;
7593 /// A utility for appending two IdentifierIterators.
7594 class ChainedIdentifierIterator : public IdentifierIterator {
7595 std::unique_ptr<IdentifierIterator> Current;
7596 std::unique_ptr<IdentifierIterator> Queued;
7599 ChainedIdentifierIterator(std::unique_ptr<IdentifierIterator> First,
7600 std::unique_ptr<IdentifierIterator> Second)
7601 : Current(std::move(First)), Queued(std::move(Second)) {}
7603 StringRef Next() override {
7607 StringRef result = Current->Next();
7608 if (!result.empty())
7611 // Try the queued iterator, which may itself be empty.
7613 std::swap(Current, Queued);
7618 } // end anonymous namespace.
7620 IdentifierIterator *ASTReader::getIdentifiers() {
7621 if (!loadGlobalIndex()) {
7622 std::unique_ptr<IdentifierIterator> ReaderIter(
7623 new ASTIdentifierIterator(*this, /*SkipModules=*/true));
7624 std::unique_ptr<IdentifierIterator> ModulesIter(
7625 GlobalIndex->createIdentifierIterator());
7626 return new ChainedIdentifierIterator(std::move(ReaderIter),
7627 std::move(ModulesIter));
7630 return new ASTIdentifierIterator(*this);
7634 namespace serialization {
7636 class ReadMethodPoolVisitor {
7639 unsigned PriorGeneration;
7640 unsigned InstanceBits;
7641 unsigned FactoryBits;
7642 bool InstanceHasMoreThanOneDecl;
7643 bool FactoryHasMoreThanOneDecl;
7644 SmallVector<ObjCMethodDecl *, 4> InstanceMethods;
7645 SmallVector<ObjCMethodDecl *, 4> FactoryMethods;
7648 ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel,
7649 unsigned PriorGeneration)
7650 : Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration),
7651 InstanceBits(0), FactoryBits(0), InstanceHasMoreThanOneDecl(false),
7652 FactoryHasMoreThanOneDecl(false) {}
7654 bool operator()(ModuleFile &M) {
7655 if (!M.SelectorLookupTable)
7658 // If we've already searched this module file, skip it now.
7659 if (M.Generation <= PriorGeneration)
7662 ++Reader.NumMethodPoolTableLookups;
7663 ASTSelectorLookupTable *PoolTable
7664 = (ASTSelectorLookupTable*)M.SelectorLookupTable;
7665 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel);
7666 if (Pos == PoolTable->end())
7669 ++Reader.NumMethodPoolTableHits;
7670 ++Reader.NumSelectorsRead;
7671 // FIXME: Not quite happy with the statistics here. We probably should
7672 // disable this tracking when called via LoadSelector.
7673 // Also, should entries without methods count as misses?
7674 ++Reader.NumMethodPoolEntriesRead;
7675 ASTSelectorLookupTrait::data_type Data = *Pos;
7676 if (Reader.DeserializationListener)
7677 Reader.DeserializationListener->SelectorRead(Data.ID, Sel);
7679 InstanceMethods.append(Data.Instance.begin(), Data.Instance.end());
7680 FactoryMethods.append(Data.Factory.begin(), Data.Factory.end());
7681 InstanceBits = Data.InstanceBits;
7682 FactoryBits = Data.FactoryBits;
7683 InstanceHasMoreThanOneDecl = Data.InstanceHasMoreThanOneDecl;
7684 FactoryHasMoreThanOneDecl = Data.FactoryHasMoreThanOneDecl;
7688 /// \brief Retrieve the instance methods found by this visitor.
7689 ArrayRef<ObjCMethodDecl *> getInstanceMethods() const {
7690 return InstanceMethods;
7693 /// \brief Retrieve the instance methods found by this visitor.
7694 ArrayRef<ObjCMethodDecl *> getFactoryMethods() const {
7695 return FactoryMethods;
7698 unsigned getInstanceBits() const { return InstanceBits; }
7699 unsigned getFactoryBits() const { return FactoryBits; }
7700 bool instanceHasMoreThanOneDecl() const {
7701 return InstanceHasMoreThanOneDecl;
7703 bool factoryHasMoreThanOneDecl() const { return FactoryHasMoreThanOneDecl; }
7706 } // end namespace serialization
7707 } // end namespace clang
7709 /// \brief Add the given set of methods to the method list.
7710 static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods,
7711 ObjCMethodList &List) {
7712 for (unsigned I = 0, N = Methods.size(); I != N; ++I) {
7713 S.addMethodToGlobalList(&List, Methods[I]);
7717 void ASTReader::ReadMethodPool(Selector Sel) {
7718 // Get the selector generation and update it to the current generation.
7719 unsigned &Generation = SelectorGeneration[Sel];
7720 unsigned PriorGeneration = Generation;
7721 Generation = getGeneration();
7722 SelectorOutOfDate[Sel] = false;
7724 // Search for methods defined with this selector.
7725 ++NumMethodPoolLookups;
7726 ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration);
7727 ModuleMgr.visit(Visitor);
7729 if (Visitor.getInstanceMethods().empty() &&
7730 Visitor.getFactoryMethods().empty())
7733 ++NumMethodPoolHits;
7738 Sema &S = *getSema();
7739 Sema::GlobalMethodPool::iterator Pos
7740 = S.MethodPool.insert(std::make_pair(Sel, Sema::GlobalMethods())).first;
7742 Pos->second.first.setBits(Visitor.getInstanceBits());
7743 Pos->second.first.setHasMoreThanOneDecl(Visitor.instanceHasMoreThanOneDecl());
7744 Pos->second.second.setBits(Visitor.getFactoryBits());
7745 Pos->second.second.setHasMoreThanOneDecl(Visitor.factoryHasMoreThanOneDecl());
7747 // Add methods to the global pool *after* setting hasMoreThanOneDecl, since
7748 // when building a module we keep every method individually and may need to
7749 // update hasMoreThanOneDecl as we add the methods.
7750 addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first);
7751 addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second);
7754 void ASTReader::updateOutOfDateSelector(Selector Sel) {
7755 if (SelectorOutOfDate[Sel])
7756 ReadMethodPool(Sel);
7759 void ASTReader::ReadKnownNamespaces(
7760 SmallVectorImpl<NamespaceDecl *> &Namespaces) {
7763 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) {
7764 if (NamespaceDecl *Namespace
7765 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I])))
7766 Namespaces.push_back(Namespace);
7770 void ASTReader::ReadUndefinedButUsed(
7771 llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {
7772 for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) {
7773 NamedDecl *D = cast<NamedDecl>(GetDecl(UndefinedButUsed[Idx++]));
7774 SourceLocation Loc =
7775 SourceLocation::getFromRawEncoding(UndefinedButUsed[Idx++]);
7776 Undefined.insert(std::make_pair(D, Loc));
7780 void ASTReader::ReadMismatchingDeleteExpressions(llvm::MapVector<
7781 FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
7783 for (unsigned Idx = 0, N = DelayedDeleteExprs.size(); Idx != N;) {
7784 FieldDecl *FD = cast<FieldDecl>(GetDecl(DelayedDeleteExprs[Idx++]));
7785 uint64_t Count = DelayedDeleteExprs[Idx++];
7786 for (uint64_t C = 0; C < Count; ++C) {
7787 SourceLocation DeleteLoc =
7788 SourceLocation::getFromRawEncoding(DelayedDeleteExprs[Idx++]);
7789 const bool IsArrayForm = DelayedDeleteExprs[Idx++];
7790 Exprs[FD].push_back(std::make_pair(DeleteLoc, IsArrayForm));
7795 void ASTReader::ReadTentativeDefinitions(
7796 SmallVectorImpl<VarDecl *> &TentativeDefs) {
7797 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
7798 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I]));
7800 TentativeDefs.push_back(Var);
7802 TentativeDefinitions.clear();
7805 void ASTReader::ReadUnusedFileScopedDecls(
7806 SmallVectorImpl<const DeclaratorDecl *> &Decls) {
7807 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
7809 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I]));
7813 UnusedFileScopedDecls.clear();
7816 void ASTReader::ReadDelegatingConstructors(
7817 SmallVectorImpl<CXXConstructorDecl *> &Decls) {
7818 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) {
7819 CXXConstructorDecl *D
7820 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I]));
7824 DelegatingCtorDecls.clear();
7827 void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) {
7828 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) {
7830 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I]));
7834 ExtVectorDecls.clear();
7837 void ASTReader::ReadUnusedLocalTypedefNameCandidates(
7838 llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) {
7839 for (unsigned I = 0, N = UnusedLocalTypedefNameCandidates.size(); I != N;
7841 TypedefNameDecl *D = dyn_cast_or_null<TypedefNameDecl>(
7842 GetDecl(UnusedLocalTypedefNameCandidates[I]));
7846 UnusedLocalTypedefNameCandidates.clear();
7849 void ASTReader::ReadReferencedSelectors(
7850 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) {
7851 if (ReferencedSelectorsData.empty())
7854 // If there are @selector references added them to its pool. This is for
7855 // implementation of -Wselector.
7856 unsigned int DataSize = ReferencedSelectorsData.size()-1;
7858 while (I < DataSize) {
7859 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]);
7860 SourceLocation SelLoc
7861 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]);
7862 Sels.push_back(std::make_pair(Sel, SelLoc));
7864 ReferencedSelectorsData.clear();
7867 void ASTReader::ReadWeakUndeclaredIdentifiers(
7868 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) {
7869 if (WeakUndeclaredIdentifiers.empty())
7872 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) {
7873 IdentifierInfo *WeakId
7874 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
7875 IdentifierInfo *AliasId
7876 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
7878 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]);
7879 bool Used = WeakUndeclaredIdentifiers[I++];
7880 WeakInfo WI(AliasId, Loc);
7882 WeakIDs.push_back(std::make_pair(WeakId, WI));
7884 WeakUndeclaredIdentifiers.clear();
7887 void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) {
7888 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) {
7889 ExternalVTableUse VT;
7890 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
7891 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]);
7892 VT.DefinitionRequired = VTableUses[Idx++];
7893 VTables.push_back(VT);
7899 void ASTReader::ReadPendingInstantiations(
7900 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) {
7901 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) {
7902 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++]));
7904 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]);
7906 Pending.push_back(std::make_pair(D, Loc));
7908 PendingInstantiations.clear();
7911 void ASTReader::ReadLateParsedTemplates(
7912 llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
7914 for (unsigned Idx = 0, N = LateParsedTemplates.size(); Idx < N;
7916 FunctionDecl *FD = cast<FunctionDecl>(GetDecl(LateParsedTemplates[Idx++]));
7918 auto LT = llvm::make_unique<LateParsedTemplate>();
7919 LT->D = GetDecl(LateParsedTemplates[Idx++]);
7921 ModuleFile *F = getOwningModuleFile(LT->D);
7922 assert(F && "No module");
7924 unsigned TokN = LateParsedTemplates[Idx++];
7925 LT->Toks.reserve(TokN);
7926 for (unsigned T = 0; T < TokN; ++T)
7927 LT->Toks.push_back(ReadToken(*F, LateParsedTemplates, Idx));
7929 LPTMap.insert(std::make_pair(FD, std::move(LT)));
7932 LateParsedTemplates.clear();
7935 void ASTReader::LoadSelector(Selector Sel) {
7936 // It would be complicated to avoid reading the methods anyway. So don't.
7937 ReadMethodPool(Sel);
7940 void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) {
7941 assert(ID && "Non-zero identifier ID required");
7942 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range");
7943 IdentifiersLoaded[ID - 1] = II;
7944 if (DeserializationListener)
7945 DeserializationListener->IdentifierRead(ID, II);
7948 /// \brief Set the globally-visible declarations associated with the given
7951 /// If the AST reader is currently in a state where the given declaration IDs
7952 /// cannot safely be resolved, they are queued until it is safe to resolve
7955 /// \param II an IdentifierInfo that refers to one or more globally-visible
7958 /// \param DeclIDs the set of declaration IDs with the name @p II that are
7959 /// visible at global scope.
7961 /// \param Decls if non-null, this vector will be populated with the set of
7962 /// deserialized declarations. These declarations will not be pushed into
7965 ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II,
7966 const SmallVectorImpl<uint32_t> &DeclIDs,
7967 SmallVectorImpl<Decl *> *Decls) {
7968 if (NumCurrentElementsDeserializing && !Decls) {
7969 PendingIdentifierInfos[II].append(DeclIDs.begin(), DeclIDs.end());
7973 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
7975 // Queue this declaration so that it will be added to the
7976 // translation unit scope and identifier's declaration chain
7977 // once a Sema object is known.
7978 PreloadedDeclIDs.push_back(DeclIDs[I]);
7982 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));
7984 // If we're simply supposed to record the declarations, do so now.
7986 Decls->push_back(D);
7990 // Introduce this declaration into the translation-unit scope
7991 // and add it to the declaration chain for this identifier, so
7992 // that (unqualified) name lookup will find it.
7993 pushExternalDeclIntoScope(D, II);
7997 IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) {
8001 if (IdentifiersLoaded.empty()) {
8002 Error("no identifier table in AST file");
8007 if (!IdentifiersLoaded[ID]) {
8008 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1);
8009 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map");
8010 ModuleFile *M = I->second;
8011 unsigned Index = ID - M->BaseIdentifierID;
8012 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index];
8014 // All of the strings in the AST file are preceded by a 16-bit length.
8015 // Extract that 16-bit length to avoid having to execute strlen().
8016 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as
8017 // unsigned integers. This is important to avoid integer overflow when
8018 // we cast them to 'unsigned'.
8019 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2;
8020 unsigned StrLen = (((unsigned) StrLenPtr[0])
8021 | (((unsigned) StrLenPtr[1]) << 8)) - 1;
8022 auto &II = PP.getIdentifierTable().get(StringRef(Str, StrLen));
8023 IdentifiersLoaded[ID] = &II;
8024 markIdentifierFromAST(*this, II);
8025 if (DeserializationListener)
8026 DeserializationListener->IdentifierRead(ID + 1, &II);
8029 return IdentifiersLoaded[ID];
8032 IdentifierInfo *ASTReader::getLocalIdentifier(ModuleFile &M, unsigned LocalID) {
8033 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID));
8036 IdentifierID ASTReader::getGlobalIdentifierID(ModuleFile &M, unsigned LocalID) {
8037 if (LocalID < NUM_PREDEF_IDENT_IDS)
8040 if (!M.ModuleOffsetMap.empty())
8041 ReadModuleOffsetMap(M);
8043 ContinuousRangeMap<uint32_t, int, 2>::iterator I
8044 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS);
8045 assert(I != M.IdentifierRemap.end()
8046 && "Invalid index into identifier index remap");
8048 return LocalID + I->second;
8051 MacroInfo *ASTReader::getMacro(MacroID ID) {
8055 if (MacrosLoaded.empty()) {
8056 Error("no macro table in AST file");
8060 ID -= NUM_PREDEF_MACRO_IDS;
8061 if (!MacrosLoaded[ID]) {
8062 GlobalMacroMapType::iterator I
8063 = GlobalMacroMap.find(ID + NUM_PREDEF_MACRO_IDS);
8064 assert(I != GlobalMacroMap.end() && "Corrupted global macro map");
8065 ModuleFile *M = I->second;
8066 unsigned Index = ID - M->BaseMacroID;
8067 MacrosLoaded[ID] = ReadMacroRecord(*M, M->MacroOffsets[Index]);
8069 if (DeserializationListener)
8070 DeserializationListener->MacroRead(ID + NUM_PREDEF_MACRO_IDS,
8074 return MacrosLoaded[ID];
8077 MacroID ASTReader::getGlobalMacroID(ModuleFile &M, unsigned LocalID) {
8078 if (LocalID < NUM_PREDEF_MACRO_IDS)
8081 if (!M.ModuleOffsetMap.empty())
8082 ReadModuleOffsetMap(M);
8084 ContinuousRangeMap<uint32_t, int, 2>::iterator I
8085 = M.MacroRemap.find(LocalID - NUM_PREDEF_MACRO_IDS);
8086 assert(I != M.MacroRemap.end() && "Invalid index into macro index remap");
8088 return LocalID + I->second;
8091 serialization::SubmoduleID
8092 ASTReader::getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID) {
8093 if (LocalID < NUM_PREDEF_SUBMODULE_IDS)
8096 if (!M.ModuleOffsetMap.empty())
8097 ReadModuleOffsetMap(M);
8099 ContinuousRangeMap<uint32_t, int, 2>::iterator I
8100 = M.SubmoduleRemap.find(LocalID - NUM_PREDEF_SUBMODULE_IDS);
8101 assert(I != M.SubmoduleRemap.end()
8102 && "Invalid index into submodule index remap");
8104 return LocalID + I->second;
8107 Module *ASTReader::getSubmodule(SubmoduleID GlobalID) {
8108 if (GlobalID < NUM_PREDEF_SUBMODULE_IDS) {
8109 assert(GlobalID == 0 && "Unhandled global submodule ID");
8113 if (GlobalID > SubmodulesLoaded.size()) {
8114 Error("submodule ID out of range in AST file");
8118 return SubmodulesLoaded[GlobalID - NUM_PREDEF_SUBMODULE_IDS];
8121 Module *ASTReader::getModule(unsigned ID) {
8122 return getSubmodule(ID);
8125 ModuleFile *ASTReader::getLocalModuleFile(ModuleFile &F, unsigned ID) {
8127 // It's a module, look it up by submodule ID.
8128 auto I = GlobalSubmoduleMap.find(getGlobalSubmoduleID(F, ID >> 1));
8129 return I == GlobalSubmoduleMap.end() ? nullptr : I->second;
8131 // It's a prefix (preamble, PCH, ...). Look it up by index.
8132 unsigned IndexFromEnd = ID >> 1;
8133 assert(IndexFromEnd && "got reference to unknown module file");
8134 return getModuleManager().pch_modules().end()[-IndexFromEnd];
8138 unsigned ASTReader::getModuleFileID(ModuleFile *F) {
8142 // For a file representing a module, use the submodule ID of the top-level
8143 // module as the file ID. For any other kind of file, the number of such
8144 // files loaded beforehand will be the same on reload.
8145 // FIXME: Is this true even if we have an explicit module file and a PCH?
8147 return ((F->BaseSubmoduleID + NUM_PREDEF_SUBMODULE_IDS) << 1) | 1;
8149 auto PCHModules = getModuleManager().pch_modules();
8150 auto I = std::find(PCHModules.begin(), PCHModules.end(), F);
8151 assert(I != PCHModules.end() && "emitting reference to unknown file");
8152 return (I - PCHModules.end()) << 1;
8155 llvm::Optional<ExternalASTSource::ASTSourceDescriptor>
8156 ASTReader::getSourceDescriptor(unsigned ID) {
8157 if (const Module *M = getSubmodule(ID))
8158 return ExternalASTSource::ASTSourceDescriptor(*M);
8160 // If there is only a single PCH, return it instead.
8161 // Chained PCH are not suported.
8162 const auto &PCHChain = ModuleMgr.pch_modules();
8163 if (std::distance(std::begin(PCHChain), std::end(PCHChain))) {
8164 ModuleFile &MF = ModuleMgr.getPrimaryModule();
8165 StringRef ModuleName = llvm::sys::path::filename(MF.OriginalSourceFileName);
8166 StringRef FileName = llvm::sys::path::filename(MF.FileName);
8167 return ASTReader::ASTSourceDescriptor(ModuleName, MF.OriginalDir, FileName,
8173 ExternalASTSource::ExtKind ASTReader::hasExternalDefinitions(const Decl *FD) {
8174 auto I = BodySource.find(FD);
8175 if (I == BodySource.end())
8176 return EK_ReplyHazy;
8177 return I->second ? EK_Never : EK_Always;
8180 Selector ASTReader::getLocalSelector(ModuleFile &M, unsigned LocalID) {
8181 return DecodeSelector(getGlobalSelectorID(M, LocalID));
8184 Selector ASTReader::DecodeSelector(serialization::SelectorID ID) {
8188 if (ID > SelectorsLoaded.size()) {
8189 Error("selector ID out of range in AST file");
8193 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == nullptr) {
8194 // Load this selector from the selector table.
8195 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID);
8196 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map");
8197 ModuleFile &M = *I->second;
8198 ASTSelectorLookupTrait Trait(*this, M);
8199 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS;
8200 SelectorsLoaded[ID - 1] =
8201 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0);
8202 if (DeserializationListener)
8203 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]);
8206 return SelectorsLoaded[ID - 1];
8209 Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) {
8210 return DecodeSelector(ID);
8213 uint32_t ASTReader::GetNumExternalSelectors() {
8214 // ID 0 (the null selector) is considered an external selector.
8215 return getTotalNumSelectors() + 1;
8218 serialization::SelectorID
8219 ASTReader::getGlobalSelectorID(ModuleFile &M, unsigned LocalID) const {
8220 if (LocalID < NUM_PREDEF_SELECTOR_IDS)
8223 if (!M.ModuleOffsetMap.empty())
8224 ReadModuleOffsetMap(M);
8226 ContinuousRangeMap<uint32_t, int, 2>::iterator I
8227 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS);
8228 assert(I != M.SelectorRemap.end()
8229 && "Invalid index into selector index remap");
8231 return LocalID + I->second;
8235 ASTReader::ReadDeclarationName(ModuleFile &F,
8236 const RecordData &Record, unsigned &Idx) {
8237 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++];
8239 case DeclarationName::Identifier:
8240 return DeclarationName(GetIdentifierInfo(F, Record, Idx));
8242 case DeclarationName::ObjCZeroArgSelector:
8243 case DeclarationName::ObjCOneArgSelector:
8244 case DeclarationName::ObjCMultiArgSelector:
8245 return DeclarationName(ReadSelector(F, Record, Idx));
8247 case DeclarationName::CXXConstructorName:
8248 return Context.DeclarationNames.getCXXConstructorName(
8249 Context.getCanonicalType(readType(F, Record, Idx)));
8251 case DeclarationName::CXXDestructorName:
8252 return Context.DeclarationNames.getCXXDestructorName(
8253 Context.getCanonicalType(readType(F, Record, Idx)));
8255 case DeclarationName::CXXDeductionGuideName:
8256 return Context.DeclarationNames.getCXXDeductionGuideName(
8257 ReadDeclAs<TemplateDecl>(F, Record, Idx));
8259 case DeclarationName::CXXConversionFunctionName:
8260 return Context.DeclarationNames.getCXXConversionFunctionName(
8261 Context.getCanonicalType(readType(F, Record, Idx)));
8263 case DeclarationName::CXXOperatorName:
8264 return Context.DeclarationNames.getCXXOperatorName(
8265 (OverloadedOperatorKind)Record[Idx++]);
8267 case DeclarationName::CXXLiteralOperatorName:
8268 return Context.DeclarationNames.getCXXLiteralOperatorName(
8269 GetIdentifierInfo(F, Record, Idx));
8271 case DeclarationName::CXXUsingDirective:
8272 return DeclarationName::getUsingDirectiveName();
8275 llvm_unreachable("Invalid NameKind!");
8278 void ASTReader::ReadDeclarationNameLoc(ModuleFile &F,
8279 DeclarationNameLoc &DNLoc,
8280 DeclarationName Name,
8281 const RecordData &Record, unsigned &Idx) {
8282 switch (Name.getNameKind()) {
8283 case DeclarationName::CXXConstructorName:
8284 case DeclarationName::CXXDestructorName:
8285 case DeclarationName::CXXConversionFunctionName:
8286 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx);
8289 case DeclarationName::CXXOperatorName:
8290 DNLoc.CXXOperatorName.BeginOpNameLoc
8291 = ReadSourceLocation(F, Record, Idx).getRawEncoding();
8292 DNLoc.CXXOperatorName.EndOpNameLoc
8293 = ReadSourceLocation(F, Record, Idx).getRawEncoding();
8296 case DeclarationName::CXXLiteralOperatorName:
8297 DNLoc.CXXLiteralOperatorName.OpNameLoc
8298 = ReadSourceLocation(F, Record, Idx).getRawEncoding();
8301 case DeclarationName::Identifier:
8302 case DeclarationName::ObjCZeroArgSelector:
8303 case DeclarationName::ObjCOneArgSelector:
8304 case DeclarationName::ObjCMultiArgSelector:
8305 case DeclarationName::CXXUsingDirective:
8306 case DeclarationName::CXXDeductionGuideName:
8311 void ASTReader::ReadDeclarationNameInfo(ModuleFile &F,
8312 DeclarationNameInfo &NameInfo,
8313 const RecordData &Record, unsigned &Idx) {
8314 NameInfo.setName(ReadDeclarationName(F, Record, Idx));
8315 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx));
8316 DeclarationNameLoc DNLoc;
8317 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx);
8318 NameInfo.setInfo(DNLoc);
8321 void ASTReader::ReadQualifierInfo(ModuleFile &F, QualifierInfo &Info,
8322 const RecordData &Record, unsigned &Idx) {
8323 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx);
8324 unsigned NumTPLists = Record[Idx++];
8325 Info.NumTemplParamLists = NumTPLists;
8327 Info.TemplParamLists = new (Context) TemplateParameterList*[NumTPLists];
8328 for (unsigned i = 0; i != NumTPLists; ++i)
8329 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx);
8334 ASTReader::ReadTemplateName(ModuleFile &F, const RecordData &Record,
8336 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++];
8338 case TemplateName::Template:
8339 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx));
8341 case TemplateName::OverloadedTemplate: {
8342 unsigned size = Record[Idx++];
8343 UnresolvedSet<8> Decls;
8345 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx));
8347 return Context.getOverloadedTemplateName(Decls.begin(), Decls.end());
8350 case TemplateName::QualifiedTemplate: {
8351 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx);
8352 bool hasTemplKeyword = Record[Idx++];
8353 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx);
8354 return Context.getQualifiedTemplateName(NNS, hasTemplKeyword, Template);
8357 case TemplateName::DependentTemplate: {
8358 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx);
8359 if (Record[Idx++]) // isIdentifier
8360 return Context.getDependentTemplateName(NNS,
8361 GetIdentifierInfo(F, Record,
8363 return Context.getDependentTemplateName(NNS,
8364 (OverloadedOperatorKind)Record[Idx++]);
8367 case TemplateName::SubstTemplateTemplateParm: {
8368 TemplateTemplateParmDecl *param
8369 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx);
8370 if (!param) return TemplateName();
8371 TemplateName replacement = ReadTemplateName(F, Record, Idx);
8372 return Context.getSubstTemplateTemplateParm(param, replacement);
8375 case TemplateName::SubstTemplateTemplateParmPack: {
8376 TemplateTemplateParmDecl *Param
8377 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx);
8379 return TemplateName();
8381 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx);
8382 if (ArgPack.getKind() != TemplateArgument::Pack)
8383 return TemplateName();
8385 return Context.getSubstTemplateTemplateParmPack(Param, ArgPack);
8389 llvm_unreachable("Unhandled template name kind!");
8392 TemplateArgument ASTReader::ReadTemplateArgument(ModuleFile &F,
8393 const RecordData &Record,
8395 bool Canonicalize) {
8397 // The caller wants a canonical template argument. Sometimes the AST only
8398 // wants template arguments in canonical form (particularly as the template
8399 // argument lists of template specializations) so ensure we preserve that
8400 // canonical form across serialization.
8401 TemplateArgument Arg = ReadTemplateArgument(F, Record, Idx, false);
8402 return Context.getCanonicalTemplateArgument(Arg);
8405 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++];
8407 case TemplateArgument::Null:
8408 return TemplateArgument();
8409 case TemplateArgument::Type:
8410 return TemplateArgument(readType(F, Record, Idx));
8411 case TemplateArgument::Declaration: {
8412 ValueDecl *D = ReadDeclAs<ValueDecl>(F, Record, Idx);
8413 return TemplateArgument(D, readType(F, Record, Idx));
8415 case TemplateArgument::NullPtr:
8416 return TemplateArgument(readType(F, Record, Idx), /*isNullPtr*/true);
8417 case TemplateArgument::Integral: {
8418 llvm::APSInt Value = ReadAPSInt(Record, Idx);
8419 QualType T = readType(F, Record, Idx);
8420 return TemplateArgument(Context, Value, T);
8422 case TemplateArgument::Template:
8423 return TemplateArgument(ReadTemplateName(F, Record, Idx));
8424 case TemplateArgument::TemplateExpansion: {
8425 TemplateName Name = ReadTemplateName(F, Record, Idx);
8426 Optional<unsigned> NumTemplateExpansions;
8427 if (unsigned NumExpansions = Record[Idx++])
8428 NumTemplateExpansions = NumExpansions - 1;
8429 return TemplateArgument(Name, NumTemplateExpansions);
8431 case TemplateArgument::Expression:
8432 return TemplateArgument(ReadExpr(F));
8433 case TemplateArgument::Pack: {
8434 unsigned NumArgs = Record[Idx++];
8435 TemplateArgument *Args = new (Context) TemplateArgument[NumArgs];
8436 for (unsigned I = 0; I != NumArgs; ++I)
8437 Args[I] = ReadTemplateArgument(F, Record, Idx);
8438 return TemplateArgument(llvm::makeArrayRef(Args, NumArgs));
8442 llvm_unreachable("Unhandled template argument kind!");
8445 TemplateParameterList *
8446 ASTReader::ReadTemplateParameterList(ModuleFile &F,
8447 const RecordData &Record, unsigned &Idx) {
8448 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx);
8449 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx);
8450 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx);
8452 unsigned NumParams = Record[Idx++];
8453 SmallVector<NamedDecl *, 16> Params;
8454 Params.reserve(NumParams);
8456 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx));
8459 TemplateParameterList* TemplateParams =
8460 TemplateParameterList::Create(Context, TemplateLoc, LAngleLoc,
8461 Params, RAngleLoc, nullptr);
8462 return TemplateParams;
8467 ReadTemplateArgumentList(SmallVectorImpl<TemplateArgument> &TemplArgs,
8468 ModuleFile &F, const RecordData &Record,
8469 unsigned &Idx, bool Canonicalize) {
8470 unsigned NumTemplateArgs = Record[Idx++];
8471 TemplArgs.reserve(NumTemplateArgs);
8472 while (NumTemplateArgs--)
8473 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx, Canonicalize));
8476 /// \brief Read a UnresolvedSet structure.
8477 void ASTReader::ReadUnresolvedSet(ModuleFile &F, LazyASTUnresolvedSet &Set,
8478 const RecordData &Record, unsigned &Idx) {
8479 unsigned NumDecls = Record[Idx++];
8480 Set.reserve(Context, NumDecls);
8481 while (NumDecls--) {
8482 DeclID ID = ReadDeclID(F, Record, Idx);
8483 AccessSpecifier AS = (AccessSpecifier)Record[Idx++];
8484 Set.addLazyDecl(Context, ID, AS);
8489 ASTReader::ReadCXXBaseSpecifier(ModuleFile &F,
8490 const RecordData &Record, unsigned &Idx) {
8491 bool isVirtual = static_cast<bool>(Record[Idx++]);
8492 bool isBaseOfClass = static_cast<bool>(Record[Idx++]);
8493 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]);
8494 bool inheritConstructors = static_cast<bool>(Record[Idx++]);
8495 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx);
8496 SourceRange Range = ReadSourceRange(F, Record, Idx);
8497 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx);
8498 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo,
8500 Result.setInheritConstructors(inheritConstructors);
8504 CXXCtorInitializer **
8505 ASTReader::ReadCXXCtorInitializers(ModuleFile &F, const RecordData &Record,
8507 unsigned NumInitializers = Record[Idx++];
8508 assert(NumInitializers && "wrote ctor initializers but have no inits");
8509 auto **CtorInitializers = new (Context) CXXCtorInitializer*[NumInitializers];
8510 for (unsigned i = 0; i != NumInitializers; ++i) {
8511 TypeSourceInfo *TInfo = nullptr;
8512 bool IsBaseVirtual = false;
8513 FieldDecl *Member = nullptr;
8514 IndirectFieldDecl *IndirectMember = nullptr;
8516 CtorInitializerType Type = (CtorInitializerType)Record[Idx++];
8518 case CTOR_INITIALIZER_BASE:
8519 TInfo = GetTypeSourceInfo(F, Record, Idx);
8520 IsBaseVirtual = Record[Idx++];
8523 case CTOR_INITIALIZER_DELEGATING:
8524 TInfo = GetTypeSourceInfo(F, Record, Idx);
8527 case CTOR_INITIALIZER_MEMBER:
8528 Member = ReadDeclAs<FieldDecl>(F, Record, Idx);
8531 case CTOR_INITIALIZER_INDIRECT_MEMBER:
8532 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx);
8536 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx);
8537 Expr *Init = ReadExpr(F);
8538 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx);
8539 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx);
8541 CXXCtorInitializer *BOMInit;
8542 if (Type == CTOR_INITIALIZER_BASE)
8543 BOMInit = new (Context)
8544 CXXCtorInitializer(Context, TInfo, IsBaseVirtual, LParenLoc, Init,
8545 RParenLoc, MemberOrEllipsisLoc);
8546 else if (Type == CTOR_INITIALIZER_DELEGATING)
8547 BOMInit = new (Context)
8548 CXXCtorInitializer(Context, TInfo, LParenLoc, Init, RParenLoc);
8550 BOMInit = new (Context)
8551 CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc, LParenLoc,
8554 BOMInit = new (Context)
8555 CXXCtorInitializer(Context, IndirectMember, MemberOrEllipsisLoc,
8556 LParenLoc, Init, RParenLoc);
8558 if (/*IsWritten*/Record[Idx++]) {
8559 unsigned SourceOrder = Record[Idx++];
8560 BOMInit->setSourceOrder(SourceOrder);
8563 CtorInitializers[i] = BOMInit;
8566 return CtorInitializers;
8569 NestedNameSpecifier *
8570 ASTReader::ReadNestedNameSpecifier(ModuleFile &F,
8571 const RecordData &Record, unsigned &Idx) {
8572 unsigned N = Record[Idx++];
8573 NestedNameSpecifier *NNS = nullptr, *Prev = nullptr;
8574 for (unsigned I = 0; I != N; ++I) {
8575 NestedNameSpecifier::SpecifierKind Kind
8576 = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
8578 case NestedNameSpecifier::Identifier: {
8579 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx);
8580 NNS = NestedNameSpecifier::Create(Context, Prev, II);
8584 case NestedNameSpecifier::Namespace: {
8585 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx);
8586 NNS = NestedNameSpecifier::Create(Context, Prev, NS);
8590 case NestedNameSpecifier::NamespaceAlias: {
8591 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx);
8592 NNS = NestedNameSpecifier::Create(Context, Prev, Alias);
8596 case NestedNameSpecifier::TypeSpec:
8597 case NestedNameSpecifier::TypeSpecWithTemplate: {
8598 const Type *T = readType(F, Record, Idx).getTypePtrOrNull();
8602 bool Template = Record[Idx++];
8603 NNS = NestedNameSpecifier::Create(Context, Prev, Template, T);
8607 case NestedNameSpecifier::Global: {
8608 NNS = NestedNameSpecifier::GlobalSpecifier(Context);
8609 // No associated value, and there can't be a prefix.
8613 case NestedNameSpecifier::Super: {
8614 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(F, Record, Idx);
8615 NNS = NestedNameSpecifier::SuperSpecifier(Context, RD);
8624 NestedNameSpecifierLoc
8625 ASTReader::ReadNestedNameSpecifierLoc(ModuleFile &F, const RecordData &Record,
8627 unsigned N = Record[Idx++];
8628 NestedNameSpecifierLocBuilder Builder;
8629 for (unsigned I = 0; I != N; ++I) {
8630 NestedNameSpecifier::SpecifierKind Kind
8631 = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
8633 case NestedNameSpecifier::Identifier: {
8634 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx);
8635 SourceRange Range = ReadSourceRange(F, Record, Idx);
8636 Builder.Extend(Context, II, Range.getBegin(), Range.getEnd());
8640 case NestedNameSpecifier::Namespace: {
8641 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx);
8642 SourceRange Range = ReadSourceRange(F, Record, Idx);
8643 Builder.Extend(Context, NS, Range.getBegin(), Range.getEnd());
8647 case NestedNameSpecifier::NamespaceAlias: {
8648 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx);
8649 SourceRange Range = ReadSourceRange(F, Record, Idx);
8650 Builder.Extend(Context, Alias, Range.getBegin(), Range.getEnd());
8654 case NestedNameSpecifier::TypeSpec:
8655 case NestedNameSpecifier::TypeSpecWithTemplate: {
8656 bool Template = Record[Idx++];
8657 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx);
8659 return NestedNameSpecifierLoc();
8660 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx);
8662 // FIXME: 'template' keyword location not saved anywhere, so we fake it.
8663 Builder.Extend(Context,
8664 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(),
8665 T->getTypeLoc(), ColonColonLoc);
8669 case NestedNameSpecifier::Global: {
8670 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx);
8671 Builder.MakeGlobal(Context, ColonColonLoc);
8675 case NestedNameSpecifier::Super: {
8676 CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(F, Record, Idx);
8677 SourceRange Range = ReadSourceRange(F, Record, Idx);
8678 Builder.MakeSuper(Context, RD, Range.getBegin(), Range.getEnd());
8684 return Builder.getWithLocInContext(Context);
8688 ASTReader::ReadSourceRange(ModuleFile &F, const RecordData &Record,
8690 SourceLocation beg = ReadSourceLocation(F, Record, Idx);
8691 SourceLocation end = ReadSourceLocation(F, Record, Idx);
8692 return SourceRange(beg, end);
8695 /// \brief Read an integral value
8696 llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) {
8697 unsigned BitWidth = Record[Idx++];
8698 unsigned NumWords = llvm::APInt::getNumWords(BitWidth);
8699 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]);
8704 /// \brief Read a signed integral value
8705 llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) {
8706 bool isUnsigned = Record[Idx++];
8707 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned);
8710 /// \brief Read a floating-point value
8711 llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record,
8712 const llvm::fltSemantics &Sem,
8714 return llvm::APFloat(Sem, ReadAPInt(Record, Idx));
8717 // \brief Read a string
8718 std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) {
8719 unsigned Len = Record[Idx++];
8720 std::string Result(Record.data() + Idx, Record.data() + Idx + Len);
8725 std::string ASTReader::ReadPath(ModuleFile &F, const RecordData &Record,
8727 std::string Filename = ReadString(Record, Idx);
8728 ResolveImportedPath(F, Filename);
8732 VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record,
8734 unsigned Major = Record[Idx++];
8735 unsigned Minor = Record[Idx++];
8736 unsigned Subminor = Record[Idx++];
8738 return VersionTuple(Major);
8740 return VersionTuple(Major, Minor - 1);
8741 return VersionTuple(Major, Minor - 1, Subminor - 1);
8744 CXXTemporary *ASTReader::ReadCXXTemporary(ModuleFile &F,
8745 const RecordData &Record,
8747 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx);
8748 return CXXTemporary::Create(Context, Decl);
8751 DiagnosticBuilder ASTReader::Diag(unsigned DiagID) const {
8752 return Diag(CurrentImportLoc, DiagID);
8755 DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) const {
8756 return Diags.Report(Loc, DiagID);
8759 /// \brief Retrieve the identifier table associated with the
8761 IdentifierTable &ASTReader::getIdentifierTable() {
8762 return PP.getIdentifierTable();
8765 /// \brief Record that the given ID maps to the given switch-case
8767 void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) {
8768 assert((*CurrSwitchCaseStmts)[ID] == nullptr &&
8769 "Already have a SwitchCase with this ID");
8770 (*CurrSwitchCaseStmts)[ID] = SC;
8773 /// \brief Retrieve the switch-case statement with the given ID.
8774 SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) {
8775 assert((*CurrSwitchCaseStmts)[ID] != nullptr && "No SwitchCase with this ID");
8776 return (*CurrSwitchCaseStmts)[ID];
8779 void ASTReader::ClearSwitchCaseIDs() {
8780 CurrSwitchCaseStmts->clear();
8783 void ASTReader::ReadComments() {
8784 std::vector<RawComment *> Comments;
8785 for (SmallVectorImpl<std::pair<BitstreamCursor,
8786 serialization::ModuleFile *> >::iterator
8787 I = CommentsCursors.begin(),
8788 E = CommentsCursors.end();
8791 BitstreamCursor &Cursor = I->first;
8792 serialization::ModuleFile &F = *I->second;
8793 SavedStreamPosition SavedPosition(Cursor);
8797 llvm::BitstreamEntry Entry =
8798 Cursor.advanceSkippingSubblocks(BitstreamCursor::AF_DontPopBlockAtEnd);
8800 switch (Entry.Kind) {
8801 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
8802 case llvm::BitstreamEntry::Error:
8803 Error("malformed block record in AST file");
8805 case llvm::BitstreamEntry::EndBlock:
8807 case llvm::BitstreamEntry::Record:
8808 // The interesting case.
8814 switch ((CommentRecordTypes)Cursor.readRecord(Entry.ID, Record)) {
8815 case COMMENTS_RAW_COMMENT: {
8817 SourceRange SR = ReadSourceRange(F, Record, Idx);
8818 RawComment::CommentKind Kind =
8819 (RawComment::CommentKind) Record[Idx++];
8820 bool IsTrailingComment = Record[Idx++];
8821 bool IsAlmostTrailingComment = Record[Idx++];
8822 Comments.push_back(new (Context) RawComment(
8823 SR, Kind, IsTrailingComment, IsAlmostTrailingComment,
8824 Context.getLangOpts().CommentOpts.ParseAllComments));
8830 // De-serialized SourceLocations get negative FileIDs for other modules,
8831 // potentially invalidating the original order. Sort it again.
8832 std::sort(Comments.begin(), Comments.end(),
8833 BeforeThanCompare<RawComment>(SourceMgr));
8834 Context.Comments.addDeserializedComments(Comments);
8838 void ASTReader::visitInputFiles(serialization::ModuleFile &MF,
8839 bool IncludeSystem, bool Complain,
8840 llvm::function_ref<void(const serialization::InputFile &IF,
8841 bool isSystem)> Visitor) {
8842 unsigned NumUserInputs = MF.NumUserInputFiles;
8843 unsigned NumInputs = MF.InputFilesLoaded.size();
8844 assert(NumUserInputs <= NumInputs);
8845 unsigned N = IncludeSystem ? NumInputs : NumUserInputs;
8846 for (unsigned I = 0; I < N; ++I) {
8847 bool IsSystem = I >= NumUserInputs;
8848 InputFile IF = getInputFile(MF, I+1, Complain);
8849 Visitor(IF, IsSystem);
8853 std::string ASTReader::getOwningModuleNameForDiagnostic(const Decl *D) {
8854 // If we know the owning module, use it.
8855 if (Module *M = D->getImportedOwningModule())
8856 return M->getFullModuleName();
8858 // Otherwise, use the name of the top-level module the decl is within.
8859 if (ModuleFile *M = getOwningModuleFile(D))
8860 return M->ModuleName;
8862 // Not from a module.
8866 void ASTReader::finishPendingActions() {
8867 while (!PendingIdentifierInfos.empty() ||
8868 !PendingIncompleteDeclChains.empty() || !PendingDeclChains.empty() ||
8869 !PendingMacroIDs.empty() || !PendingDeclContextInfos.empty() ||
8870 !PendingUpdateRecords.empty()) {
8871 // If any identifiers with corresponding top-level declarations have
8872 // been loaded, load those declarations now.
8873 typedef llvm::DenseMap<IdentifierInfo *, SmallVector<Decl *, 2> >
8875 TopLevelDeclsMap TopLevelDecls;
8877 while (!PendingIdentifierInfos.empty()) {
8878 IdentifierInfo *II = PendingIdentifierInfos.back().first;
8879 SmallVector<uint32_t, 4> DeclIDs =
8880 std::move(PendingIdentifierInfos.back().second);
8881 PendingIdentifierInfos.pop_back();
8883 SetGloballyVisibleDecls(II, DeclIDs, &TopLevelDecls[II]);
8886 // For each decl chain that we wanted to complete while deserializing, mark
8887 // it as "still needs to be completed".
8888 for (unsigned I = 0; I != PendingIncompleteDeclChains.size(); ++I) {
8889 markIncompleteDeclChain(PendingIncompleteDeclChains[I]);
8891 PendingIncompleteDeclChains.clear();
8893 // Load pending declaration chains.
8894 for (unsigned I = 0; I != PendingDeclChains.size(); ++I)
8895 loadPendingDeclChain(PendingDeclChains[I].first, PendingDeclChains[I].second);
8896 PendingDeclChains.clear();
8898 // Make the most recent of the top-level declarations visible.
8899 for (TopLevelDeclsMap::iterator TLD = TopLevelDecls.begin(),
8900 TLDEnd = TopLevelDecls.end(); TLD != TLDEnd; ++TLD) {
8901 IdentifierInfo *II = TLD->first;
8902 for (unsigned I = 0, N = TLD->second.size(); I != N; ++I) {
8903 pushExternalDeclIntoScope(cast<NamedDecl>(TLD->second[I]), II);
8907 // Load any pending macro definitions.
8908 for (unsigned I = 0; I != PendingMacroIDs.size(); ++I) {
8909 IdentifierInfo *II = PendingMacroIDs.begin()[I].first;
8910 SmallVector<PendingMacroInfo, 2> GlobalIDs;
8911 GlobalIDs.swap(PendingMacroIDs.begin()[I].second);
8912 // Initialize the macro history from chained-PCHs ahead of module imports.
8913 for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
8915 const PendingMacroInfo &Info = GlobalIDs[IDIdx];
8916 if (!Info.M->isModule())
8917 resolvePendingMacro(II, Info);
8919 // Handle module imports.
8920 for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
8922 const PendingMacroInfo &Info = GlobalIDs[IDIdx];
8923 if (Info.M->isModule())
8924 resolvePendingMacro(II, Info);
8927 PendingMacroIDs.clear();
8929 // Wire up the DeclContexts for Decls that we delayed setting until
8930 // recursive loading is completed.
8931 while (!PendingDeclContextInfos.empty()) {
8932 PendingDeclContextInfo Info = PendingDeclContextInfos.front();
8933 PendingDeclContextInfos.pop_front();
8934 DeclContext *SemaDC = cast<DeclContext>(GetDecl(Info.SemaDC));
8935 DeclContext *LexicalDC = cast<DeclContext>(GetDecl(Info.LexicalDC));
8936 Info.D->setDeclContextsImpl(SemaDC, LexicalDC, getContext());
8939 // Perform any pending declaration updates.
8940 while (!PendingUpdateRecords.empty()) {
8941 auto Update = PendingUpdateRecords.pop_back_val();
8942 ReadingKindTracker ReadingKind(Read_Decl, *this);
8943 loadDeclUpdateRecords(Update.first, Update.second);
8947 // At this point, all update records for loaded decls are in place, so any
8948 // fake class definitions should have become real.
8949 assert(PendingFakeDefinitionData.empty() &&
8950 "faked up a class definition but never saw the real one");
8952 // If we deserialized any C++ or Objective-C class definitions, any
8953 // Objective-C protocol definitions, or any redeclarable templates, make sure
8954 // that all redeclarations point to the definitions. Note that this can only
8955 // happen now, after the redeclaration chains have been fully wired.
8956 for (Decl *D : PendingDefinitions) {
8957 if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
8958 if (const TagType *TagT = dyn_cast<TagType>(TD->getTypeForDecl())) {
8959 // Make sure that the TagType points at the definition.
8960 const_cast<TagType*>(TagT)->decl = TD;
8963 if (auto RD = dyn_cast<CXXRecordDecl>(D)) {
8964 for (auto *R = getMostRecentExistingDecl(RD); R;
8965 R = R->getPreviousDecl()) {
8967 cast<CXXRecordDecl>(R)->isThisDeclarationADefinition() &&
8968 "declaration thinks it's the definition but it isn't");
8969 cast<CXXRecordDecl>(R)->DefinitionData = RD->DefinitionData;
8976 if (auto ID = dyn_cast<ObjCInterfaceDecl>(D)) {
8977 // Make sure that the ObjCInterfaceType points at the definition.
8978 const_cast<ObjCInterfaceType *>(cast<ObjCInterfaceType>(ID->TypeForDecl))
8981 for (auto *R = getMostRecentExistingDecl(ID); R; R = R->getPreviousDecl())
8982 cast<ObjCInterfaceDecl>(R)->Data = ID->Data;
8987 if (auto PD = dyn_cast<ObjCProtocolDecl>(D)) {
8988 for (auto *R = getMostRecentExistingDecl(PD); R; R = R->getPreviousDecl())
8989 cast<ObjCProtocolDecl>(R)->Data = PD->Data;
8994 auto RTD = cast<RedeclarableTemplateDecl>(D)->getCanonicalDecl();
8995 for (auto *R = getMostRecentExistingDecl(RTD); R; R = R->getPreviousDecl())
8996 cast<RedeclarableTemplateDecl>(R)->Common = RTD->Common;
8998 PendingDefinitions.clear();
9000 // Load the bodies of any functions or methods we've encountered. We do
9001 // this now (delayed) so that we can be sure that the declaration chains
9002 // have been fully wired up (hasBody relies on this).
9003 // FIXME: We shouldn't require complete redeclaration chains here.
9004 for (PendingBodiesMap::iterator PB = PendingBodies.begin(),
9005 PBEnd = PendingBodies.end();
9006 PB != PBEnd; ++PB) {
9007 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(PB->first)) {
9008 // FIXME: Check for =delete/=default?
9009 // FIXME: Complain about ODR violations here?
9010 const FunctionDecl *Defn = nullptr;
9011 if (!getContext().getLangOpts().Modules || !FD->hasBody(Defn)) {
9012 FD->setLazyBody(PB->second);
9014 mergeDefinitionVisibility(const_cast<FunctionDecl*>(Defn), FD);
9018 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(PB->first);
9019 if (!getContext().getLangOpts().Modules || !MD->hasBody())
9020 MD->setLazyBody(PB->second);
9022 PendingBodies.clear();
9025 for (auto *ND : PendingMergedDefinitionsToDeduplicate)
9026 getContext().deduplicateMergedDefinitonsFor(ND);
9027 PendingMergedDefinitionsToDeduplicate.clear();
9030 void ASTReader::diagnoseOdrViolations() {
9031 if (PendingOdrMergeFailures.empty() && PendingOdrMergeChecks.empty())
9034 // Trigger the import of the full definition of each class that had any
9035 // odr-merging problems, so we can produce better diagnostics for them.
9036 // These updates may in turn find and diagnose some ODR failures, so take
9037 // ownership of the set first.
9038 auto OdrMergeFailures = std::move(PendingOdrMergeFailures);
9039 PendingOdrMergeFailures.clear();
9040 for (auto &Merge : OdrMergeFailures) {
9041 Merge.first->buildLookup();
9042 Merge.first->decls_begin();
9043 Merge.first->bases_begin();
9044 Merge.first->vbases_begin();
9045 for (auto *RD : Merge.second) {
9052 // For each declaration from a merged context, check that the canonical
9053 // definition of that context also contains a declaration of the same
9056 // Caution: this loop does things that might invalidate iterators into
9057 // PendingOdrMergeChecks. Don't turn this into a range-based for loop!
9058 while (!PendingOdrMergeChecks.empty()) {
9059 NamedDecl *D = PendingOdrMergeChecks.pop_back_val();
9061 // FIXME: Skip over implicit declarations for now. This matters for things
9062 // like implicitly-declared special member functions. This isn't entirely
9063 // correct; we can end up with multiple unmerged declarations of the same
9065 if (D->isImplicit())
9068 DeclContext *CanonDef = D->getDeclContext();
9071 const Decl *DCanon = D->getCanonicalDecl();
9073 for (auto RI : D->redecls()) {
9074 if (RI->getLexicalDeclContext() == CanonDef) {
9082 // Quick check failed, time to do the slow thing. Note, we can't just
9083 // look up the name of D in CanonDef here, because the member that is
9084 // in CanonDef might not be found by name lookup (it might have been
9085 // replaced by a more recent declaration in the lookup table), and we
9086 // can't necessarily find it in the redeclaration chain because it might
9087 // be merely mergeable, not redeclarable.
9088 llvm::SmallVector<const NamedDecl*, 4> Candidates;
9089 for (auto *CanonMember : CanonDef->decls()) {
9090 if (CanonMember->getCanonicalDecl() == DCanon) {
9091 // This can happen if the declaration is merely mergeable and not
9092 // actually redeclarable (we looked for redeclarations earlier).
9094 // FIXME: We should be able to detect this more efficiently, without
9095 // pulling in all of the members of CanonDef.
9099 if (auto *ND = dyn_cast<NamedDecl>(CanonMember))
9100 if (ND->getDeclName() == D->getDeclName())
9101 Candidates.push_back(ND);
9105 // The AST doesn't like TagDecls becoming invalid after they've been
9106 // completed. We only really need to mark FieldDecls as invalid here.
9107 if (!isa<TagDecl>(D))
9108 D->setInvalidDecl();
9110 // Ensure we don't accidentally recursively enter deserialization while
9111 // we're producing our diagnostic.
9112 Deserializing RecursionGuard(this);
9114 std::string CanonDefModule =
9115 getOwningModuleNameForDiagnostic(cast<Decl>(CanonDef));
9116 Diag(D->getLocation(), diag::err_module_odr_violation_missing_decl)
9117 << D << getOwningModuleNameForDiagnostic(D)
9118 << CanonDef << CanonDefModule.empty() << CanonDefModule;
9120 if (Candidates.empty())
9121 Diag(cast<Decl>(CanonDef)->getLocation(),
9122 diag::note_module_odr_violation_no_possible_decls) << D;
9124 for (unsigned I = 0, N = Candidates.size(); I != N; ++I)
9125 Diag(Candidates[I]->getLocation(),
9126 diag::note_module_odr_violation_possible_decl)
9130 DiagnosedOdrMergeFailures.insert(CanonDef);
9134 if (OdrMergeFailures.empty())
9137 // Ensure we don't accidentally recursively enter deserialization while
9138 // we're producing our diagnostics.
9139 Deserializing RecursionGuard(this);
9141 // Issue any pending ODR-failure diagnostics.
9142 for (auto &Merge : OdrMergeFailures) {
9143 // If we've already pointed out a specific problem with this class, don't
9144 // bother issuing a general "something's different" diagnostic.
9145 if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
9148 bool Diagnosed = false;
9149 CXXRecordDecl *FirstRecord = Merge.first;
9150 std::string FirstModule = getOwningModuleNameForDiagnostic(FirstRecord);
9151 for (CXXRecordDecl *SecondRecord : Merge.second) {
9152 // Multiple different declarations got merged together; tell the user
9153 // where they came from.
9154 if (FirstRecord == SecondRecord)
9157 std::string SecondModule = getOwningModuleNameForDiagnostic(SecondRecord);
9158 using DeclHashes = llvm::SmallVector<std::pair<Decl *, unsigned>, 4>;
9159 DeclHashes FirstHashes;
9160 DeclHashes SecondHashes;
9163 auto PopulateHashes = [&Hash, FirstRecord](DeclHashes &Hashes,
9164 CXXRecordDecl *Record) {
9165 for (auto *D : Record->decls()) {
9166 // Due to decl merging, the first CXXRecordDecl is the parent of
9167 // Decls in both records.
9168 if (!ODRHash::isWhitelistedDecl(D, FirstRecord))
9172 Hashes.emplace_back(D, Hash.CalculateHash());
9175 PopulateHashes(FirstHashes, FirstRecord);
9176 PopulateHashes(SecondHashes, SecondRecord);
9178 // Used with err_module_odr_violation_mismatch_decl and
9179 // note_module_odr_violation_mismatch_decl
9189 } FirstDiffType = Other,
9190 SecondDiffType = Other;
9192 auto DifferenceSelector = [](Decl *D) {
9193 assert(D && "valid Decl required");
9194 switch (D->getKind()) {
9197 case Decl::AccessSpec:
9198 switch (D->getAccess()) {
9200 return PublicSpecifer;
9202 return PrivateSpecifer;
9204 return ProtectedSpecifer;
9208 llvm_unreachable("Invalid access specifier");
9209 case Decl::StaticAssert:
9210 return StaticAssert;
9213 case Decl::CXXMethod:
9218 Decl *FirstDecl = nullptr;
9219 Decl *SecondDecl = nullptr;
9220 auto FirstIt = FirstHashes.begin();
9221 auto SecondIt = SecondHashes.begin();
9223 // If there is a diagnoseable difference, FirstDiffType and
9224 // SecondDiffType will not be Other and FirstDecl and SecondDecl will be
9225 // filled in if not EndOfClass.
9226 while (FirstIt != FirstHashes.end() || SecondIt != SecondHashes.end()) {
9227 if (FirstIt != FirstHashes.end() && SecondIt != SecondHashes.end() &&
9228 FirstIt->second == SecondIt->second) {
9234 FirstDecl = FirstIt == FirstHashes.end() ? nullptr : FirstIt->first;
9235 SecondDecl = SecondIt == SecondHashes.end() ? nullptr : SecondIt->first;
9237 FirstDiffType = FirstDecl ? DifferenceSelector(FirstDecl) : EndOfClass;
9239 SecondDecl ? DifferenceSelector(SecondDecl) : EndOfClass;
9244 if (FirstDiffType == Other || SecondDiffType == Other) {
9245 // Reaching this point means an unexpected Decl was encountered
9246 // or no difference was detected. This causes a generic error
9247 // message to be emitted.
9248 Diag(FirstRecord->getLocation(),
9249 diag::err_module_odr_violation_different_definitions)
9250 << FirstRecord << FirstModule.empty() << FirstModule;
9252 Diag(SecondRecord->getLocation(),
9253 diag::note_module_odr_violation_different_definitions)
9259 if (FirstDiffType != SecondDiffType) {
9260 SourceLocation FirstLoc;
9261 SourceRange FirstRange;
9262 if (FirstDiffType == EndOfClass) {
9263 FirstLoc = FirstRecord->getBraceRange().getEnd();
9265 FirstLoc = FirstIt->first->getLocation();
9266 FirstRange = FirstIt->first->getSourceRange();
9268 Diag(FirstLoc, diag::err_module_odr_violation_mismatch_decl)
9269 << FirstRecord << FirstModule.empty() << FirstModule << FirstRange
9272 SourceLocation SecondLoc;
9273 SourceRange SecondRange;
9274 if (SecondDiffType == EndOfClass) {
9275 SecondLoc = SecondRecord->getBraceRange().getEnd();
9277 SecondLoc = SecondDecl->getLocation();
9278 SecondRange = SecondDecl->getSourceRange();
9280 Diag(SecondLoc, diag::note_module_odr_violation_mismatch_decl)
9281 << SecondModule << SecondRange << SecondDiffType;
9286 assert(FirstDiffType == SecondDiffType);
9288 // Used with err_module_odr_violation_mismatch_decl_diff and
9289 // note_module_odr_violation_mismatch_decl_diff
9290 enum ODRDeclDifference{
9291 StaticAssertCondition,
9292 StaticAssertMessage,
9293 StaticAssertOnlyMessage,
9296 FieldSingleBitField,
9297 FieldDifferentWidthBitField,
9299 FieldSingleInitializer,
9300 FieldDifferentInitializers,
9310 // These lambdas have the common portions of the ODR diagnostics. This
9311 // has the same return as Diag(), so addition parameters can be passed
9312 // in with operator<<
9313 auto ODRDiagError = [FirstRecord, &FirstModule, this](
9314 SourceLocation Loc, SourceRange Range, ODRDeclDifference DiffType) {
9315 return Diag(Loc, diag::err_module_odr_violation_mismatch_decl_diff)
9316 << FirstRecord << FirstModule.empty() << FirstModule << Range
9319 auto ODRDiagNote = [&SecondModule, this](
9320 SourceLocation Loc, SourceRange Range, ODRDeclDifference DiffType) {
9321 return Diag(Loc, diag::note_module_odr_violation_mismatch_decl_diff)
9322 << SecondModule << Range << DiffType;
9325 auto ComputeODRHash = [&Hash](const Stmt* S) {
9329 return Hash.CalculateHash();
9332 auto ComputeDeclNameODRHash = [&Hash](const DeclarationName Name) {
9334 Hash.AddDeclarationName(Name);
9335 return Hash.CalculateHash();
9338 switch (FirstDiffType) {
9341 case PublicSpecifer:
9342 case PrivateSpecifer:
9343 case ProtectedSpecifer:
9344 llvm_unreachable("Invalid diff type");
9346 case StaticAssert: {
9347 StaticAssertDecl *FirstSA = cast<StaticAssertDecl>(FirstDecl);
9348 StaticAssertDecl *SecondSA = cast<StaticAssertDecl>(SecondDecl);
9350 Expr *FirstExpr = FirstSA->getAssertExpr();
9351 Expr *SecondExpr = SecondSA->getAssertExpr();
9352 unsigned FirstODRHash = ComputeODRHash(FirstExpr);
9353 unsigned SecondODRHash = ComputeODRHash(SecondExpr);
9354 if (FirstODRHash != SecondODRHash) {
9355 ODRDiagError(FirstExpr->getLocStart(), FirstExpr->getSourceRange(),
9356 StaticAssertCondition);
9357 ODRDiagNote(SecondExpr->getLocStart(),
9358 SecondExpr->getSourceRange(), StaticAssertCondition);
9363 StringLiteral *FirstStr = FirstSA->getMessage();
9364 StringLiteral *SecondStr = SecondSA->getMessage();
9365 assert((FirstStr || SecondStr) && "Both messages cannot be empty");
9366 if ((FirstStr && !SecondStr) || (!FirstStr && SecondStr)) {
9367 SourceLocation FirstLoc, SecondLoc;
9368 SourceRange FirstRange, SecondRange;
9370 FirstLoc = FirstStr->getLocStart();
9371 FirstRange = FirstStr->getSourceRange();
9373 FirstLoc = FirstSA->getLocStart();
9374 FirstRange = FirstSA->getSourceRange();
9377 SecondLoc = SecondStr->getLocStart();
9378 SecondRange = SecondStr->getSourceRange();
9380 SecondLoc = SecondSA->getLocStart();
9381 SecondRange = SecondSA->getSourceRange();
9383 ODRDiagError(FirstLoc, FirstRange, StaticAssertOnlyMessage)
9384 << (FirstStr == nullptr);
9385 ODRDiagNote(SecondLoc, SecondRange, StaticAssertOnlyMessage)
9386 << (SecondStr == nullptr);
9391 if (FirstStr && SecondStr &&
9392 FirstStr->getString() != SecondStr->getString()) {
9393 ODRDiagError(FirstStr->getLocStart(), FirstStr->getSourceRange(),
9394 StaticAssertMessage);
9395 ODRDiagNote(SecondStr->getLocStart(), SecondStr->getSourceRange(),
9396 StaticAssertMessage);
9403 FieldDecl *FirstField = cast<FieldDecl>(FirstDecl);
9404 FieldDecl *SecondField = cast<FieldDecl>(SecondDecl);
9405 IdentifierInfo *FirstII = FirstField->getIdentifier();
9406 IdentifierInfo *SecondII = SecondField->getIdentifier();
9407 if (FirstII->getName() != SecondII->getName()) {
9408 ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
9411 ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
9420 Context.hasSameType(FirstField->getType(), SecondField->getType()));
9422 QualType FirstType = FirstField->getType();
9423 QualType SecondType = SecondField->getType();
9424 const TypedefType *FirstTypedef = dyn_cast<TypedefType>(FirstType);
9425 const TypedefType *SecondTypedef = dyn_cast<TypedefType>(SecondType);
9427 if ((FirstTypedef && !SecondTypedef) ||
9428 (!FirstTypedef && SecondTypedef)) {
9429 ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
9431 << FirstII << FirstType;
9432 ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
9434 << SecondII << SecondType;
9440 if (FirstTypedef && SecondTypedef) {
9441 unsigned FirstHash = ComputeDeclNameODRHash(
9442 FirstTypedef->getDecl()->getDeclName());
9443 unsigned SecondHash = ComputeDeclNameODRHash(
9444 SecondTypedef->getDecl()->getDeclName());
9445 if (FirstHash != SecondHash) {
9446 ODRDiagError(FirstField->getLocation(),
9447 FirstField->getSourceRange(), FieldTypeName)
9448 << FirstII << FirstType;
9449 ODRDiagNote(SecondField->getLocation(),
9450 SecondField->getSourceRange(), FieldTypeName)
9451 << SecondII << SecondType;
9458 const bool IsFirstBitField = FirstField->isBitField();
9459 const bool IsSecondBitField = SecondField->isBitField();
9460 if (IsFirstBitField != IsSecondBitField) {
9461 ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
9462 FieldSingleBitField)
9463 << FirstII << IsFirstBitField;
9464 ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
9465 FieldSingleBitField)
9466 << SecondII << IsSecondBitField;
9471 if (IsFirstBitField && IsSecondBitField) {
9472 ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
9473 FieldDifferentWidthBitField)
9474 << FirstII << FirstField->getBitWidth()->getSourceRange();
9475 ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
9476 FieldDifferentWidthBitField)
9477 << SecondII << SecondField->getBitWidth()->getSourceRange();
9482 const bool IsFirstMutable = FirstField->isMutable();
9483 const bool IsSecondMutable = SecondField->isMutable();
9484 if (IsFirstMutable != IsSecondMutable) {
9485 ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
9487 << FirstII << IsFirstMutable;
9488 ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
9490 << SecondII << IsSecondMutable;
9495 const Expr *FirstInitializer = FirstField->getInClassInitializer();
9496 const Expr *SecondInitializer = SecondField->getInClassInitializer();
9497 if ((!FirstInitializer && SecondInitializer) ||
9498 (FirstInitializer && !SecondInitializer)) {
9499 ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
9500 FieldSingleInitializer)
9501 << FirstII << (FirstInitializer != nullptr);
9502 ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
9503 FieldSingleInitializer)
9504 << SecondII << (SecondInitializer != nullptr);
9509 if (FirstInitializer && SecondInitializer) {
9510 unsigned FirstInitHash = ComputeODRHash(FirstInitializer);
9511 unsigned SecondInitHash = ComputeODRHash(SecondInitializer);
9512 if (FirstInitHash != SecondInitHash) {
9513 ODRDiagError(FirstField->getLocation(),
9514 FirstField->getSourceRange(),
9515 FieldDifferentInitializers)
9516 << FirstII << FirstInitializer->getSourceRange();
9517 ODRDiagNote(SecondField->getLocation(),
9518 SecondField->getSourceRange(),
9519 FieldDifferentInitializers)
9520 << SecondII << SecondInitializer->getSourceRange();
9529 const CXXMethodDecl *FirstMethod = cast<CXXMethodDecl>(FirstDecl);
9530 const CXXMethodDecl *SecondMethod = cast<CXXMethodDecl>(SecondDecl);
9531 auto FirstName = FirstMethod->getDeclName();
9532 auto SecondName = SecondMethod->getDeclName();
9533 if (FirstName != SecondName) {
9534 ODRDiagError(FirstMethod->getLocation(),
9535 FirstMethod->getSourceRange(), MethodName)
9537 ODRDiagNote(SecondMethod->getLocation(),
9538 SecondMethod->getSourceRange(), MethodName)
9545 const bool FirstDeleted = FirstMethod->isDeleted();
9546 const bool SecondDeleted = SecondMethod->isDeleted();
9547 if (FirstDeleted != SecondDeleted) {
9548 ODRDiagError(FirstMethod->getLocation(),
9549 FirstMethod->getSourceRange(), MethodDeleted)
9550 << FirstName << FirstDeleted;
9552 ODRDiagNote(SecondMethod->getLocation(),
9553 SecondMethod->getSourceRange(), MethodDeleted)
9554 << SecondName << SecondDeleted;
9559 const bool FirstVirtual = FirstMethod->isVirtualAsWritten();
9560 const bool SecondVirtual = SecondMethod->isVirtualAsWritten();
9561 const bool FirstPure = FirstMethod->isPure();
9562 const bool SecondPure = SecondMethod->isPure();
9563 if ((FirstVirtual || SecondVirtual) &&
9564 (FirstVirtual != SecondVirtual || FirstPure != SecondPure)) {
9565 ODRDiagError(FirstMethod->getLocation(),
9566 FirstMethod->getSourceRange(), MethodVirtual)
9567 << FirstName << FirstPure << FirstVirtual;
9568 ODRDiagNote(SecondMethod->getLocation(),
9569 SecondMethod->getSourceRange(), MethodVirtual)
9570 << SecondName << SecondPure << SecondVirtual;
9575 // CXXMethodDecl::isStatic uses the canonical Decl. With Decl merging,
9576 // FirstDecl is the canonical Decl of SecondDecl, so the storage
9577 // class needs to be checked instead.
9578 const auto FirstStorage = FirstMethod->getStorageClass();
9579 const auto SecondStorage = SecondMethod->getStorageClass();
9580 const bool FirstStatic = FirstStorage == SC_Static;
9581 const bool SecondStatic = SecondStorage == SC_Static;
9582 if (FirstStatic != SecondStatic) {
9583 ODRDiagError(FirstMethod->getLocation(),
9584 FirstMethod->getSourceRange(), MethodStatic)
9585 << FirstName << FirstStatic;
9586 ODRDiagNote(SecondMethod->getLocation(),
9587 SecondMethod->getSourceRange(), MethodStatic)
9588 << SecondName << SecondStatic;
9593 const bool FirstVolatile = FirstMethod->isVolatile();
9594 const bool SecondVolatile = SecondMethod->isVolatile();
9595 if (FirstVolatile != SecondVolatile) {
9596 ODRDiagError(FirstMethod->getLocation(),
9597 FirstMethod->getSourceRange(), MethodVolatile)
9598 << FirstName << FirstVolatile;
9599 ODRDiagNote(SecondMethod->getLocation(),
9600 SecondMethod->getSourceRange(), MethodVolatile)
9601 << SecondName << SecondVolatile;
9606 const bool FirstConst = FirstMethod->isConst();
9607 const bool SecondConst = SecondMethod->isConst();
9608 if (FirstConst != SecondConst) {
9609 ODRDiagError(FirstMethod->getLocation(),
9610 FirstMethod->getSourceRange(), MethodConst)
9611 << FirstName << FirstConst;
9612 ODRDiagNote(SecondMethod->getLocation(),
9613 SecondMethod->getSourceRange(), MethodConst)
9614 << SecondName << SecondConst;
9619 const bool FirstInline = FirstMethod->isInlineSpecified();
9620 const bool SecondInline = SecondMethod->isInlineSpecified();
9621 if (FirstInline != SecondInline) {
9622 ODRDiagError(FirstMethod->getLocation(),
9623 FirstMethod->getSourceRange(), MethodInline)
9624 << FirstName << FirstInline;
9625 ODRDiagNote(SecondMethod->getLocation(),
9626 SecondMethod->getSourceRange(), MethodInline)
9627 << SecondName << SecondInline;
9636 if (Diagnosed == true)
9639 Diag(FirstRecord->getLocation(),
9640 diag::err_module_odr_violation_different_definitions)
9641 << FirstRecord << FirstModule.empty() << FirstModule;
9643 Diag(SecondRecord->getLocation(),
9644 diag::note_module_odr_violation_different_definitions)
9650 // All definitions are updates to the same declaration. This happens if a
9651 // module instantiates the declaration of a class template specialization
9652 // and two or more other modules instantiate its definition.
9654 // FIXME: Indicate which modules had instantiations of this definition.
9655 // FIXME: How can this even happen?
9656 Diag(Merge.first->getLocation(),
9657 diag::err_module_odr_violation_different_instantiations)
9663 void ASTReader::StartedDeserializing() {
9664 if (++NumCurrentElementsDeserializing == 1 && ReadTimer.get())
9665 ReadTimer->startTimer();
9668 void ASTReader::FinishedDeserializing() {
9669 assert(NumCurrentElementsDeserializing &&
9670 "FinishedDeserializing not paired with StartedDeserializing");
9671 if (NumCurrentElementsDeserializing == 1) {
9672 // We decrease NumCurrentElementsDeserializing only after pending actions
9673 // are finished, to avoid recursively re-calling finishPendingActions().
9674 finishPendingActions();
9676 --NumCurrentElementsDeserializing;
9678 if (NumCurrentElementsDeserializing == 0) {
9679 // Propagate exception specification updates along redeclaration chains.
9680 while (!PendingExceptionSpecUpdates.empty()) {
9681 auto Updates = std::move(PendingExceptionSpecUpdates);
9682 PendingExceptionSpecUpdates.clear();
9683 for (auto Update : Updates) {
9684 ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
9685 auto *FPT = Update.second->getType()->castAs<FunctionProtoType>();
9686 auto ESI = FPT->getExtProtoInfo().ExceptionSpec;
9687 if (auto *Listener = Context.getASTMutationListener())
9688 Listener->ResolvedExceptionSpec(cast<FunctionDecl>(Update.second));
9689 for (auto *Redecl : Update.second->redecls())
9690 Context.adjustExceptionSpec(cast<FunctionDecl>(Redecl), ESI);
9695 ReadTimer->stopTimer();
9697 diagnoseOdrViolations();
9699 // We are not in recursive loading, so it's safe to pass the "interesting"
9700 // decls to the consumer.
9702 PassInterestingDeclsToConsumer();
9706 void ASTReader::pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name) {
9707 if (IdentifierInfo *II = Name.getAsIdentifierInfo()) {
9708 // Remove any fake results before adding any real ones.
9709 auto It = PendingFakeLookupResults.find(II);
9710 if (It != PendingFakeLookupResults.end()) {
9711 for (auto *ND : It->second)
9712 SemaObj->IdResolver.RemoveDecl(ND);
9713 // FIXME: this works around module+PCH performance issue.
9714 // Rather than erase the result from the map, which is O(n), just clear
9715 // the vector of NamedDecls.
9720 if (SemaObj->IdResolver.tryAddTopLevelDecl(D, Name) && SemaObj->TUScope) {
9721 SemaObj->TUScope->AddDecl(D);
9722 } else if (SemaObj->TUScope) {
9723 // Adding the decl to IdResolver may have failed because it was already in
9724 // (even though it was not added in scope). If it is already in, make sure
9725 // it gets in the scope as well.
9726 if (std::find(SemaObj->IdResolver.begin(Name),
9727 SemaObj->IdResolver.end(), D) != SemaObj->IdResolver.end())
9728 SemaObj->TUScope->AddDecl(D);
9732 ASTReader::ASTReader(Preprocessor &PP, ASTContext &Context,
9733 const PCHContainerReader &PCHContainerRdr,
9734 ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
9735 StringRef isysroot, bool DisableValidation,
9736 bool AllowASTWithCompilerErrors,
9737 bool AllowConfigurationMismatch, bool ValidateSystemInputs,
9738 bool UseGlobalIndex,
9739 std::unique_ptr<llvm::Timer> ReadTimer)
9740 : Listener(DisableValidation
9741 ? cast<ASTReaderListener>(new SimpleASTReaderListener(PP))
9742 : cast<ASTReaderListener>(new PCHValidator(PP, *this))),
9743 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()),
9744 PCHContainerRdr(PCHContainerRdr), Diags(PP.getDiagnostics()), PP(PP),
9746 ModuleMgr(PP.getFileManager(), PP.getPCMCache(), PCHContainerRdr),
9747 PCMCache(PP.getPCMCache()), DummyIdResolver(PP),
9748 ReadTimer(std::move(ReadTimer)), isysroot(isysroot),
9749 DisableValidation(DisableValidation),
9750 AllowASTWithCompilerErrors(AllowASTWithCompilerErrors),
9751 AllowConfigurationMismatch(AllowConfigurationMismatch),
9752 ValidateSystemInputs(ValidateSystemInputs),
9753 UseGlobalIndex(UseGlobalIndex), CurrSwitchCaseStmts(&SwitchCaseStmts) {
9754 SourceMgr.setExternalSLocEntrySource(this);
9756 for (const auto &Ext : Extensions) {
9757 auto BlockName = Ext->getExtensionMetadata().BlockName;
9758 auto Known = ModuleFileExtensions.find(BlockName);
9759 if (Known != ModuleFileExtensions.end()) {
9760 Diags.Report(diag::warn_duplicate_module_file_extension)
9765 ModuleFileExtensions.insert({BlockName, Ext});
9769 ASTReader::~ASTReader() {
9770 if (OwnsDeserializationListener)
9771 delete DeserializationListener;
9774 IdentifierResolver &ASTReader::getIdResolver() {
9775 return SemaObj ? SemaObj->IdResolver : DummyIdResolver;
9778 unsigned ASTRecordReader::readRecord(llvm::BitstreamCursor &Cursor,
9779 unsigned AbbrevID) {
9782 return Cursor.readRecord(AbbrevID, Record);