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/DeclTemplate.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/NestedNameSpecifier.h"
23 #include "clang/AST/Type.h"
24 #include "clang/AST/TypeLocVisitor.h"
25 #include "clang/Basic/DiagnosticOptions.h"
26 #include "clang/Basic/FileManager.h"
27 #include "clang/Basic/SourceManager.h"
28 #include "clang/Basic/SourceManagerInternals.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Basic/TargetOptions.h"
31 #include "clang/Basic/Version.h"
32 #include "clang/Basic/VersionTuple.h"
33 #include "clang/Frontend/Utils.h"
34 #include "clang/Lex/HeaderSearch.h"
35 #include "clang/Lex/HeaderSearchOptions.h"
36 #include "clang/Lex/MacroInfo.h"
37 #include "clang/Lex/PreprocessingRecord.h"
38 #include "clang/Lex/Preprocessor.h"
39 #include "clang/Lex/PreprocessorOptions.h"
40 #include "clang/Sema/Scope.h"
41 #include "clang/Sema/Sema.h"
42 #include "clang/Serialization/ASTDeserializationListener.h"
43 #include "clang/Serialization/GlobalModuleIndex.h"
44 #include "clang/Serialization/ModuleManager.h"
45 #include "clang/Serialization/SerializationDiagnostic.h"
46 #include "llvm/ADT/Hashing.h"
47 #include "llvm/ADT/StringExtras.h"
48 #include "llvm/Bitcode/BitstreamReader.h"
49 #include "llvm/Support/ErrorHandling.h"
50 #include "llvm/Support/FileSystem.h"
51 #include "llvm/Support/MemoryBuffer.h"
52 #include "llvm/Support/Path.h"
53 #include "llvm/Support/SaveAndRestore.h"
54 #include "llvm/Support/raw_ostream.h"
58 #include <system_error>
60 using namespace clang;
61 using namespace clang::serialization;
62 using namespace clang::serialization::reader;
63 using llvm::BitstreamCursor;
66 //===----------------------------------------------------------------------===//
67 // ChainedASTReaderListener implementation
68 //===----------------------------------------------------------------------===//
71 ChainedASTReaderListener::ReadFullVersionInformation(StringRef FullVersion) {
72 return First->ReadFullVersionInformation(FullVersion) ||
73 Second->ReadFullVersionInformation(FullVersion);
75 void ChainedASTReaderListener::ReadModuleName(StringRef ModuleName) {
76 First->ReadModuleName(ModuleName);
77 Second->ReadModuleName(ModuleName);
79 void ChainedASTReaderListener::ReadModuleMapFile(StringRef ModuleMapPath) {
80 First->ReadModuleMapFile(ModuleMapPath);
81 Second->ReadModuleMapFile(ModuleMapPath);
83 bool ChainedASTReaderListener::ReadLanguageOptions(const LangOptions &LangOpts,
85 return First->ReadLanguageOptions(LangOpts, Complain) ||
86 Second->ReadLanguageOptions(LangOpts, Complain);
89 ChainedASTReaderListener::ReadTargetOptions(const TargetOptions &TargetOpts,
91 return First->ReadTargetOptions(TargetOpts, Complain) ||
92 Second->ReadTargetOptions(TargetOpts, Complain);
94 bool ChainedASTReaderListener::ReadDiagnosticOptions(
95 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
96 return First->ReadDiagnosticOptions(DiagOpts, Complain) ||
97 Second->ReadDiagnosticOptions(DiagOpts, Complain);
100 ChainedASTReaderListener::ReadFileSystemOptions(const FileSystemOptions &FSOpts,
102 return First->ReadFileSystemOptions(FSOpts, Complain) ||
103 Second->ReadFileSystemOptions(FSOpts, Complain);
106 bool ChainedASTReaderListener::ReadHeaderSearchOptions(
107 const HeaderSearchOptions &HSOpts, bool Complain) {
108 return First->ReadHeaderSearchOptions(HSOpts, Complain) ||
109 Second->ReadHeaderSearchOptions(HSOpts, Complain);
111 bool ChainedASTReaderListener::ReadPreprocessorOptions(
112 const PreprocessorOptions &PPOpts, bool Complain,
113 std::string &SuggestedPredefines) {
114 return First->ReadPreprocessorOptions(PPOpts, Complain,
115 SuggestedPredefines) ||
116 Second->ReadPreprocessorOptions(PPOpts, Complain, SuggestedPredefines);
118 void ChainedASTReaderListener::ReadCounter(const serialization::ModuleFile &M,
120 First->ReadCounter(M, Value);
121 Second->ReadCounter(M, Value);
123 bool ChainedASTReaderListener::needsInputFileVisitation() {
124 return First->needsInputFileVisitation() ||
125 Second->needsInputFileVisitation();
127 bool ChainedASTReaderListener::needsSystemInputFileVisitation() {
128 return First->needsSystemInputFileVisitation() ||
129 Second->needsSystemInputFileVisitation();
131 void ChainedASTReaderListener::visitModuleFile(StringRef Filename) {
132 First->visitModuleFile(Filename);
133 Second->visitModuleFile(Filename);
135 bool ChainedASTReaderListener::visitInputFile(StringRef Filename,
138 bool Continue = false;
139 if (First->needsInputFileVisitation() &&
140 (!isSystem || First->needsSystemInputFileVisitation()))
141 Continue |= First->visitInputFile(Filename, isSystem, isOverridden);
142 if (Second->needsInputFileVisitation() &&
143 (!isSystem || Second->needsSystemInputFileVisitation()))
144 Continue |= Second->visitInputFile(Filename, isSystem, isOverridden);
148 //===----------------------------------------------------------------------===//
149 // PCH validator implementation
150 //===----------------------------------------------------------------------===//
152 ASTReaderListener::~ASTReaderListener() {}
154 /// \brief Compare the given set of language options against an existing set of
155 /// language options.
157 /// \param Diags If non-NULL, diagnostics will be emitted via this engine.
159 /// \returns true if the languagae options mis-match, false otherwise.
160 static bool checkLanguageOptions(const LangOptions &LangOpts,
161 const LangOptions &ExistingLangOpts,
162 DiagnosticsEngine *Diags) {
163 #define LANGOPT(Name, Bits, Default, Description) \
164 if (ExistingLangOpts.Name != LangOpts.Name) { \
166 Diags->Report(diag::err_pch_langopt_mismatch) \
167 << Description << LangOpts.Name << ExistingLangOpts.Name; \
171 #define VALUE_LANGOPT(Name, Bits, Default, Description) \
172 if (ExistingLangOpts.Name != LangOpts.Name) { \
174 Diags->Report(diag::err_pch_langopt_value_mismatch) \
179 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
180 if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) { \
182 Diags->Report(diag::err_pch_langopt_value_mismatch) \
187 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
188 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
189 #include "clang/Basic/LangOptions.def"
191 if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) {
193 Diags->Report(diag::err_pch_langopt_value_mismatch)
194 << "target Objective-C runtime";
198 if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
199 LangOpts.CommentOpts.BlockCommandNames) {
201 Diags->Report(diag::err_pch_langopt_value_mismatch)
202 << "block command names";
209 /// \brief Compare the given set of target options against an existing set of
212 /// \param Diags If non-NULL, diagnostics will be emitted via this engine.
214 /// \returns true if the target options mis-match, false otherwise.
215 static bool checkTargetOptions(const TargetOptions &TargetOpts,
216 const TargetOptions &ExistingTargetOpts,
217 DiagnosticsEngine *Diags) {
218 #define CHECK_TARGET_OPT(Field, Name) \
219 if (TargetOpts.Field != ExistingTargetOpts.Field) { \
221 Diags->Report(diag::err_pch_targetopt_mismatch) \
222 << Name << TargetOpts.Field << ExistingTargetOpts.Field; \
226 CHECK_TARGET_OPT(Triple, "target");
227 CHECK_TARGET_OPT(CPU, "target CPU");
228 CHECK_TARGET_OPT(ABI, "target ABI");
229 #undef CHECK_TARGET_OPT
231 // Compare feature sets.
232 SmallVector<StringRef, 4> ExistingFeatures(
233 ExistingTargetOpts.FeaturesAsWritten.begin(),
234 ExistingTargetOpts.FeaturesAsWritten.end());
235 SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(),
236 TargetOpts.FeaturesAsWritten.end());
237 std::sort(ExistingFeatures.begin(), ExistingFeatures.end());
238 std::sort(ReadFeatures.begin(), ReadFeatures.end());
240 unsigned ExistingIdx = 0, ExistingN = ExistingFeatures.size();
241 unsigned ReadIdx = 0, ReadN = ReadFeatures.size();
242 while (ExistingIdx < ExistingN && ReadIdx < ReadN) {
243 if (ExistingFeatures[ExistingIdx] == ReadFeatures[ReadIdx]) {
249 if (ReadFeatures[ReadIdx] < ExistingFeatures[ExistingIdx]) {
251 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
252 << false << ReadFeatures[ReadIdx];
257 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
258 << true << ExistingFeatures[ExistingIdx];
262 if (ExistingIdx < ExistingN) {
264 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
265 << true << ExistingFeatures[ExistingIdx];
269 if (ReadIdx < ReadN) {
271 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
272 << false << ReadFeatures[ReadIdx];
280 PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts,
282 const LangOptions &ExistingLangOpts = PP.getLangOpts();
283 return checkLanguageOptions(LangOpts, ExistingLangOpts,
284 Complain? &Reader.Diags : nullptr);
287 bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts,
289 const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts();
290 return checkTargetOptions(TargetOpts, ExistingTargetOpts,
291 Complain? &Reader.Diags : nullptr);
295 typedef llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/> >
297 typedef llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8> >
301 static bool checkDiagnosticGroupMappings(DiagnosticsEngine &StoredDiags,
302 DiagnosticsEngine &Diags,
304 typedef DiagnosticsEngine::Level Level;
306 // Check current mappings for new -Werror mappings, and the stored mappings
307 // for cases that were explicitly mapped to *not* be errors that are now
308 // errors because of options like -Werror.
309 DiagnosticsEngine *MappingSources[] = { &Diags, &StoredDiags };
311 for (DiagnosticsEngine *MappingSource : MappingSources) {
312 for (auto DiagIDMappingPair : MappingSource->getDiagnosticMappings()) {
313 diag::kind DiagID = DiagIDMappingPair.first;
314 Level CurLevel = Diags.getDiagnosticLevel(DiagID, SourceLocation());
315 if (CurLevel < DiagnosticsEngine::Error)
316 continue; // not significant
318 StoredDiags.getDiagnosticLevel(DiagID, SourceLocation());
319 if (StoredLevel < DiagnosticsEngine::Error) {
321 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror=" +
322 Diags.getDiagnosticIDs()->getWarningOptionForDiag(DiagID).str();
331 static bool isExtHandlingFromDiagsError(DiagnosticsEngine &Diags) {
332 diag::Severity Ext = Diags.getExtensionHandlingBehavior();
333 if (Ext == diag::Severity::Warning && Diags.getWarningsAsErrors())
335 return Ext >= diag::Severity::Error;
338 static bool checkDiagnosticMappings(DiagnosticsEngine &StoredDiags,
339 DiagnosticsEngine &Diags,
340 bool IsSystem, bool Complain) {
343 if (Diags.getSuppressSystemWarnings())
345 // If -Wsystem-headers was not enabled before, be conservative
346 if (StoredDiags.getSuppressSystemWarnings()) {
348 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Wsystem-headers";
353 if (Diags.getWarningsAsErrors() && !StoredDiags.getWarningsAsErrors()) {
355 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror";
359 if (Diags.getWarningsAsErrors() && Diags.getEnableAllWarnings() &&
360 !StoredDiags.getEnableAllWarnings()) {
362 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Weverything -Werror";
366 if (isExtHandlingFromDiagsError(Diags) &&
367 !isExtHandlingFromDiagsError(StoredDiags)) {
369 Diags.Report(diag::err_pch_diagopt_mismatch) << "-pedantic-errors";
373 return checkDiagnosticGroupMappings(StoredDiags, Diags, Complain);
376 bool PCHValidator::ReadDiagnosticOptions(
377 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
378 DiagnosticsEngine &ExistingDiags = PP.getDiagnostics();
379 IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(ExistingDiags.getDiagnosticIDs());
380 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
381 new DiagnosticsEngine(DiagIDs, DiagOpts.get()));
382 // This should never fail, because we would have processed these options
383 // before writing them to an ASTFile.
384 ProcessWarningOptions(*Diags, *DiagOpts, /*Report*/false);
386 ModuleManager &ModuleMgr = Reader.getModuleManager();
387 assert(ModuleMgr.size() >= 1 && "what ASTFile is this then");
389 // If the original import came from a file explicitly generated by the user,
390 // don't check the diagnostic mappings.
391 // FIXME: currently this is approximated by checking whether this is not a
393 // Note: ModuleMgr.rbegin() may not be the current module, but it must be in
394 // the transitive closure of its imports, since unrelated modules cannot be
395 // imported until after this module finishes validation.
396 ModuleFile *TopImport = *ModuleMgr.rbegin();
397 while (!TopImport->ImportedBy.empty())
398 TopImport = TopImport->ImportedBy[0];
399 if (TopImport->Kind != MK_Module)
402 StringRef ModuleName = TopImport->ModuleName;
403 assert(!ModuleName.empty() && "diagnostic options read before module name");
405 Module *M = PP.getHeaderSearchInfo().lookupModule(ModuleName);
406 assert(M && "missing module");
408 // FIXME: if the diagnostics are incompatible, save a DiagnosticOptions that
409 // contains the union of their flags.
410 return checkDiagnosticMappings(*Diags, ExistingDiags, M->IsSystem, Complain);
413 /// \brief Collect the macro definitions provided by the given preprocessor
416 collectMacroDefinitions(const PreprocessorOptions &PPOpts,
417 MacroDefinitionsMap &Macros,
418 SmallVectorImpl<StringRef> *MacroNames = nullptr) {
419 for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
420 StringRef Macro = PPOpts.Macros[I].first;
421 bool IsUndef = PPOpts.Macros[I].second;
423 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
424 StringRef MacroName = MacroPair.first;
425 StringRef MacroBody = MacroPair.second;
427 // For an #undef'd macro, we only care about the name.
429 if (MacroNames && !Macros.count(MacroName))
430 MacroNames->push_back(MacroName);
432 Macros[MacroName] = std::make_pair("", true);
436 // For a #define'd macro, figure out the actual definition.
437 if (MacroName.size() == Macro.size())
440 // Note: GCC drops anything following an end-of-line character.
441 StringRef::size_type End = MacroBody.find_first_of("\n\r");
442 MacroBody = MacroBody.substr(0, End);
445 if (MacroNames && !Macros.count(MacroName))
446 MacroNames->push_back(MacroName);
447 Macros[MacroName] = std::make_pair(MacroBody, false);
451 /// \brief Check the preprocessor options deserialized from the control block
452 /// against the preprocessor options in an existing preprocessor.
454 /// \param Diags If non-null, produce diagnostics for any mismatches incurred.
455 static bool checkPreprocessorOptions(const PreprocessorOptions &PPOpts,
456 const PreprocessorOptions &ExistingPPOpts,
457 DiagnosticsEngine *Diags,
458 FileManager &FileMgr,
459 std::string &SuggestedPredefines,
460 const LangOptions &LangOpts) {
461 // Check macro definitions.
462 MacroDefinitionsMap ASTFileMacros;
463 collectMacroDefinitions(PPOpts, ASTFileMacros);
464 MacroDefinitionsMap ExistingMacros;
465 SmallVector<StringRef, 4> ExistingMacroNames;
466 collectMacroDefinitions(ExistingPPOpts, ExistingMacros, &ExistingMacroNames);
468 for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) {
469 // Dig out the macro definition in the existing preprocessor options.
470 StringRef MacroName = ExistingMacroNames[I];
471 std::pair<StringRef, bool> Existing = ExistingMacros[MacroName];
473 // Check whether we know anything about this macro name or not.
474 llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/> >::iterator Known
475 = ASTFileMacros.find(MacroName);
476 if (Known == ASTFileMacros.end()) {
477 // FIXME: Check whether this identifier was referenced anywhere in the
478 // AST file. If so, we should reject the AST file. Unfortunately, this
479 // information isn't in the control block. What shall we do about it?
481 if (Existing.second) {
482 SuggestedPredefines += "#undef ";
483 SuggestedPredefines += MacroName.str();
484 SuggestedPredefines += '\n';
486 SuggestedPredefines += "#define ";
487 SuggestedPredefines += MacroName.str();
488 SuggestedPredefines += ' ';
489 SuggestedPredefines += Existing.first.str();
490 SuggestedPredefines += '\n';
495 // If the macro was defined in one but undef'd in the other, we have a
497 if (Existing.second != Known->second.second) {
499 Diags->Report(diag::err_pch_macro_def_undef)
500 << MacroName << Known->second.second;
505 // If the macro was #undef'd in both, or if the macro bodies are identical,
507 if (Existing.second || Existing.first == Known->second.first)
510 // The macro bodies differ; complain.
512 Diags->Report(diag::err_pch_macro_def_conflict)
513 << MacroName << Known->second.first << Existing.first;
518 // Check whether we're using predefines.
519 if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines) {
521 Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines;
526 // Detailed record is important since it is used for the module cache hash.
527 if (LangOpts.Modules &&
528 PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord) {
530 Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord;
535 // Compute the #include and #include_macros lines we need.
536 for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) {
537 StringRef File = ExistingPPOpts.Includes[I];
538 if (File == ExistingPPOpts.ImplicitPCHInclude)
541 if (std::find(PPOpts.Includes.begin(), PPOpts.Includes.end(), File)
542 != PPOpts.Includes.end())
545 SuggestedPredefines += "#include \"";
546 SuggestedPredefines += File;
547 SuggestedPredefines += "\"\n";
550 for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) {
551 StringRef File = ExistingPPOpts.MacroIncludes[I];
552 if (std::find(PPOpts.MacroIncludes.begin(), PPOpts.MacroIncludes.end(),
554 != PPOpts.MacroIncludes.end())
557 SuggestedPredefines += "#__include_macros \"";
558 SuggestedPredefines += File;
559 SuggestedPredefines += "\"\n##\n";
565 bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
567 std::string &SuggestedPredefines) {
568 const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts();
570 return checkPreprocessorOptions(PPOpts, ExistingPPOpts,
571 Complain? &Reader.Diags : nullptr,
577 void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) {
578 PP.setCounterValue(Value);
581 //===----------------------------------------------------------------------===//
582 // AST reader implementation
583 //===----------------------------------------------------------------------===//
585 void ASTReader::setDeserializationListener(ASTDeserializationListener *Listener,
586 bool TakeOwnership) {
587 DeserializationListener = Listener;
588 OwnsDeserializationListener = TakeOwnership;
593 unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) {
594 return serialization::ComputeHash(Sel);
598 std::pair<unsigned, unsigned>
599 ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
600 using namespace llvm::support;
601 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
602 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
603 return std::make_pair(KeyLen, DataLen);
606 ASTSelectorLookupTrait::internal_key_type
607 ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) {
608 using namespace llvm::support;
609 SelectorTable &SelTable = Reader.getContext().Selectors;
610 unsigned N = endian::readNext<uint16_t, little, unaligned>(d);
611 IdentifierInfo *FirstII = Reader.getLocalIdentifier(
612 F, endian::readNext<uint32_t, little, unaligned>(d));
614 return SelTable.getNullarySelector(FirstII);
616 return SelTable.getUnarySelector(FirstII);
618 SmallVector<IdentifierInfo *, 16> Args;
619 Args.push_back(FirstII);
620 for (unsigned I = 1; I != N; ++I)
621 Args.push_back(Reader.getLocalIdentifier(
622 F, endian::readNext<uint32_t, little, unaligned>(d)));
624 return SelTable.getSelector(N, Args.data());
627 ASTSelectorLookupTrait::data_type
628 ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d,
630 using namespace llvm::support;
634 Result.ID = Reader.getGlobalSelectorID(
635 F, endian::readNext<uint32_t, little, unaligned>(d));
636 unsigned NumInstanceMethodsAndBits =
637 endian::readNext<uint16_t, little, unaligned>(d);
638 unsigned NumFactoryMethodsAndBits =
639 endian::readNext<uint16_t, little, unaligned>(d);
640 Result.InstanceBits = NumInstanceMethodsAndBits & 0x3;
641 Result.FactoryBits = NumFactoryMethodsAndBits & 0x3;
642 unsigned NumInstanceMethods = NumInstanceMethodsAndBits >> 2;
643 unsigned NumFactoryMethods = NumFactoryMethodsAndBits >> 2;
645 // Load instance methods
646 for (unsigned I = 0; I != NumInstanceMethods; ++I) {
647 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
648 F, endian::readNext<uint32_t, little, unaligned>(d)))
649 Result.Instance.push_back(Method);
652 // Load factory methods
653 for (unsigned I = 0; I != NumFactoryMethods; ++I) {
654 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
655 F, endian::readNext<uint32_t, little, unaligned>(d)))
656 Result.Factory.push_back(Method);
662 unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) {
663 return llvm::HashString(a);
666 std::pair<unsigned, unsigned>
667 ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) {
668 using namespace llvm::support;
669 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
670 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
671 return std::make_pair(KeyLen, DataLen);
674 ASTIdentifierLookupTraitBase::internal_key_type
675 ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) {
676 assert(n >= 2 && d[n-1] == '\0');
677 return StringRef((const char*) d, n-1);
680 /// \brief Whether the given identifier is "interesting".
681 static bool isInterestingIdentifier(IdentifierInfo &II) {
682 return II.isPoisoned() ||
683 II.isExtensionToken() ||
684 II.getObjCOrBuiltinID() ||
685 II.hasRevertedTokenIDToIdentifier() ||
686 II.hadMacroDefinition() ||
687 II.getFETokenInfo<void>();
690 IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
691 const unsigned char* d,
693 using namespace llvm::support;
694 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
695 bool IsInteresting = RawID & 0x01;
697 // Wipe out the "is interesting" bit.
700 IdentID ID = Reader.getGlobalIdentifierID(F, RawID);
701 if (!IsInteresting) {
702 // For uninteresting identifiers, just build the IdentifierInfo
703 // and associate it with the persistent ID.
704 IdentifierInfo *II = KnownII;
706 II = &Reader.getIdentifierTable().getOwn(k);
709 Reader.SetIdentifierInfo(ID, II);
710 if (!II->isFromAST()) {
711 bool WasInteresting = isInterestingIdentifier(*II);
714 II->setChangedSinceDeserialization();
716 Reader.markIdentifierUpToDate(II);
720 unsigned ObjCOrBuiltinID = endian::readNext<uint16_t, little, unaligned>(d);
721 unsigned Bits = endian::readNext<uint16_t, little, unaligned>(d);
722 bool CPlusPlusOperatorKeyword = Bits & 0x01;
724 bool HasRevertedTokenIDToIdentifier = Bits & 0x01;
726 bool Poisoned = Bits & 0x01;
728 bool ExtensionToken = Bits & 0x01;
730 bool hasSubmoduleMacros = Bits & 0x01;
732 bool hadMacroDefinition = Bits & 0x01;
735 assert(Bits == 0 && "Extra bits in the identifier?");
738 // Build the IdentifierInfo itself and link the identifier ID with
739 // the new IdentifierInfo.
740 IdentifierInfo *II = KnownII;
742 II = &Reader.getIdentifierTable().getOwn(StringRef(k));
745 Reader.markIdentifierUpToDate(II);
746 if (!II->isFromAST()) {
747 bool WasInteresting = isInterestingIdentifier(*II);
750 II->setChangedSinceDeserialization();
753 // Set or check the various bits in the IdentifierInfo structure.
754 // Token IDs are read-only.
755 if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
756 II->RevertTokenIDToIdentifier();
757 II->setObjCOrBuiltinID(ObjCOrBuiltinID);
758 assert(II->isExtensionToken() == ExtensionToken &&
759 "Incorrect extension token flag");
760 (void)ExtensionToken;
762 II->setIsPoisoned(true);
763 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&
764 "Incorrect C++ operator keyword flag");
765 (void)CPlusPlusOperatorKeyword;
767 // If this identifier is a macro, deserialize the macro
769 if (hadMacroDefinition) {
770 uint32_t MacroDirectivesOffset =
771 endian::readNext<uint32_t, little, unaligned>(d);
773 SmallVector<uint32_t, 8> LocalMacroIDs;
774 if (hasSubmoduleMacros) {
776 uint32_t LocalMacroID =
777 endian::readNext<uint32_t, little, unaligned>(d);
779 if (LocalMacroID == 0xdeadbeef) break;
780 LocalMacroIDs.push_back(LocalMacroID);
784 if (F.Kind == MK_Module) {
785 // Macro definitions are stored from newest to oldest, so reverse them
786 // before registering them.
787 llvm::SmallVector<unsigned, 8> MacroSizes;
788 for (SmallVectorImpl<uint32_t>::iterator
789 I = LocalMacroIDs.begin(), E = LocalMacroIDs.end(); I != E; /**/) {
792 static const uint32_t HasOverridesFlag = 0x80000000U;
793 if (I + 1 != E && (I[1] & HasOverridesFlag))
794 Size += 1 + (I[1] & ~HasOverridesFlag);
796 MacroSizes.push_back(Size);
800 SmallVectorImpl<uint32_t>::iterator I = LocalMacroIDs.end();
801 for (SmallVectorImpl<unsigned>::reverse_iterator SI = MacroSizes.rbegin(),
802 SE = MacroSizes.rend();
806 uint32_t LocalMacroID = *I;
807 ArrayRef<uint32_t> Overrides;
809 Overrides = llvm::makeArrayRef(&I[2], *SI - 2);
810 Reader.addPendingMacroFromModule(II, &F, LocalMacroID, Overrides);
812 assert(I == LocalMacroIDs.begin());
814 Reader.addPendingMacroFromPCH(II, &F, MacroDirectivesOffset);
818 Reader.SetIdentifierInfo(ID, II);
820 // Read all of the declarations visible at global scope with this
823 SmallVector<uint32_t, 4> DeclIDs;
824 for (; DataLen > 0; DataLen -= 4)
825 DeclIDs.push_back(Reader.getGlobalDeclID(
826 F, endian::readNext<uint32_t, little, unaligned>(d)));
827 Reader.SetGloballyVisibleDecls(II, DeclIDs);
834 ASTDeclContextNameLookupTrait::ComputeHash(const DeclNameKey &Key) const {
835 llvm::FoldingSetNodeID ID;
836 ID.AddInteger(Key.Kind);
839 case DeclarationName::Identifier:
840 case DeclarationName::CXXLiteralOperatorName:
841 ID.AddString(((IdentifierInfo*)Key.Data)->getName());
843 case DeclarationName::ObjCZeroArgSelector:
844 case DeclarationName::ObjCOneArgSelector:
845 case DeclarationName::ObjCMultiArgSelector:
846 ID.AddInteger(serialization::ComputeHash(Selector(Key.Data)));
848 case DeclarationName::CXXOperatorName:
849 ID.AddInteger((OverloadedOperatorKind)Key.Data);
851 case DeclarationName::CXXConstructorName:
852 case DeclarationName::CXXDestructorName:
853 case DeclarationName::CXXConversionFunctionName:
854 case DeclarationName::CXXUsingDirective:
858 return ID.ComputeHash();
861 ASTDeclContextNameLookupTrait::internal_key_type
862 ASTDeclContextNameLookupTrait::GetInternalKey(
863 const external_key_type& Name) const {
865 Key.Kind = Name.getNameKind();
866 switch (Name.getNameKind()) {
867 case DeclarationName::Identifier:
868 Key.Data = (uint64_t)Name.getAsIdentifierInfo();
870 case DeclarationName::ObjCZeroArgSelector:
871 case DeclarationName::ObjCOneArgSelector:
872 case DeclarationName::ObjCMultiArgSelector:
873 Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr();
875 case DeclarationName::CXXOperatorName:
876 Key.Data = Name.getCXXOverloadedOperator();
878 case DeclarationName::CXXLiteralOperatorName:
879 Key.Data = (uint64_t)Name.getCXXLiteralIdentifier();
881 case DeclarationName::CXXConstructorName:
882 case DeclarationName::CXXDestructorName:
883 case DeclarationName::CXXConversionFunctionName:
884 case DeclarationName::CXXUsingDirective:
892 std::pair<unsigned, unsigned>
893 ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
894 using namespace llvm::support;
895 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
896 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
897 return std::make_pair(KeyLen, DataLen);
900 ASTDeclContextNameLookupTrait::internal_key_type
901 ASTDeclContextNameLookupTrait::ReadKey(const unsigned char* d, unsigned) {
902 using namespace llvm::support;
905 Key.Kind = (DeclarationName::NameKind)*d++;
907 case DeclarationName::Identifier:
908 Key.Data = (uint64_t)Reader.getLocalIdentifier(
909 F, endian::readNext<uint32_t, little, unaligned>(d));
911 case DeclarationName::ObjCZeroArgSelector:
912 case DeclarationName::ObjCOneArgSelector:
913 case DeclarationName::ObjCMultiArgSelector:
915 (uint64_t)Reader.getLocalSelector(
916 F, endian::readNext<uint32_t, little, unaligned>(
917 d)).getAsOpaquePtr();
919 case DeclarationName::CXXOperatorName:
920 Key.Data = *d++; // OverloadedOperatorKind
922 case DeclarationName::CXXLiteralOperatorName:
923 Key.Data = (uint64_t)Reader.getLocalIdentifier(
924 F, endian::readNext<uint32_t, little, unaligned>(d));
926 case DeclarationName::CXXConstructorName:
927 case DeclarationName::CXXDestructorName:
928 case DeclarationName::CXXConversionFunctionName:
929 case DeclarationName::CXXUsingDirective:
937 ASTDeclContextNameLookupTrait::data_type
938 ASTDeclContextNameLookupTrait::ReadData(internal_key_type,
939 const unsigned char* d,
941 using namespace llvm::support;
942 unsigned NumDecls = endian::readNext<uint16_t, little, unaligned>(d);
943 LE32DeclID *Start = reinterpret_cast<LE32DeclID *>(
944 const_cast<unsigned char *>(d));
945 return std::make_pair(Start, Start + NumDecls);
948 bool ASTReader::ReadDeclContextStorage(ModuleFile &M,
949 BitstreamCursor &Cursor,
950 const std::pair<uint64_t, uint64_t> &Offsets,
951 DeclContextInfo &Info) {
952 SavedStreamPosition SavedPosition(Cursor);
953 // First the lexical decls.
954 if (Offsets.first != 0) {
955 Cursor.JumpToBit(Offsets.first);
959 unsigned Code = Cursor.ReadCode();
960 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
961 if (RecCode != DECL_CONTEXT_LEXICAL) {
962 Error("Expected lexical block");
966 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob.data());
967 Info.NumLexicalDecls = Blob.size() / sizeof(KindDeclIDPair);
970 // Now the lookup table.
971 if (Offsets.second != 0) {
972 Cursor.JumpToBit(Offsets.second);
976 unsigned Code = Cursor.ReadCode();
977 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
978 if (RecCode != DECL_CONTEXT_VISIBLE) {
979 Error("Expected visible lookup table block");
982 Info.NameLookupTableData = ASTDeclContextNameLookupTable::Create(
983 (const unsigned char *)Blob.data() + Record[0],
984 (const unsigned char *)Blob.data() + sizeof(uint32_t),
985 (const unsigned char *)Blob.data(),
986 ASTDeclContextNameLookupTrait(*this, M));
992 void ASTReader::Error(StringRef Msg) {
993 Error(diag::err_fe_pch_malformed, Msg);
994 if (Context.getLangOpts().Modules && !Diags.isDiagnosticInFlight()) {
995 Diag(diag::note_module_cache_path)
996 << PP.getHeaderSearchInfo().getModuleCachePath();
1000 void ASTReader::Error(unsigned DiagID,
1001 StringRef Arg1, StringRef Arg2) {
1002 if (Diags.isDiagnosticInFlight())
1003 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2);
1005 Diag(DiagID) << Arg1 << Arg2;
1008 //===----------------------------------------------------------------------===//
1009 // Source Manager Deserialization
1010 //===----------------------------------------------------------------------===//
1012 /// \brief Read the line table in the source manager block.
1013 /// \returns true if there was an error.
1014 bool ASTReader::ParseLineTable(ModuleFile &F,
1015 SmallVectorImpl<uint64_t> &Record) {
1017 LineTableInfo &LineTable = SourceMgr.getLineTable();
1019 // Parse the file names
1020 std::map<int, int> FileIDs;
1021 for (int I = 0, N = Record[Idx++]; I != N; ++I) {
1022 // Extract the file name
1023 unsigned FilenameLen = Record[Idx++];
1024 std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen);
1026 MaybeAddSystemRootToFilename(F, Filename);
1027 FileIDs[I] = LineTable.getLineTableFilenameID(Filename);
1030 // Parse the line entries
1031 std::vector<LineEntry> Entries;
1032 while (Idx < Record.size()) {
1033 int FID = Record[Idx++];
1034 assert(FID >= 0 && "Serialized line entries for non-local file.");
1035 // Remap FileID from 1-based old view.
1036 FID += F.SLocEntryBaseID - 1;
1038 // Extract the line entries
1039 unsigned NumEntries = Record[Idx++];
1040 assert(NumEntries && "Numentries is 00000");
1042 Entries.reserve(NumEntries);
1043 for (unsigned I = 0; I != NumEntries; ++I) {
1044 unsigned FileOffset = Record[Idx++];
1045 unsigned LineNo = Record[Idx++];
1046 int FilenameID = FileIDs[Record[Idx++]];
1047 SrcMgr::CharacteristicKind FileKind
1048 = (SrcMgr::CharacteristicKind)Record[Idx++];
1049 unsigned IncludeOffset = Record[Idx++];
1050 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
1051 FileKind, IncludeOffset));
1053 LineTable.AddEntry(FileID::get(FID), Entries);
1059 /// \brief Read a source manager block
1060 bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
1061 using namespace SrcMgr;
1063 BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
1065 // Set the source-location entry cursor to the current position in
1066 // the stream. This cursor will be used to read the contents of the
1067 // source manager block initially, and then lazily read
1068 // source-location entries as needed.
1069 SLocEntryCursor = F.Stream;
1071 // The stream itself is going to skip over the source manager block.
1072 if (F.Stream.SkipBlock()) {
1073 Error("malformed block record in AST file");
1077 // Enter the source manager block.
1078 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) {
1079 Error("malformed source manager block record in AST file");
1085 llvm::BitstreamEntry E = SLocEntryCursor.advanceSkippingSubblocks();
1088 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1089 case llvm::BitstreamEntry::Error:
1090 Error("malformed block record in AST file");
1092 case llvm::BitstreamEntry::EndBlock:
1094 case llvm::BitstreamEntry::Record:
1095 // The interesting case.
1102 switch (SLocEntryCursor.readRecord(E.ID, Record, &Blob)) {
1103 default: // Default behavior: ignore.
1106 case SM_SLOC_FILE_ENTRY:
1107 case SM_SLOC_BUFFER_ENTRY:
1108 case SM_SLOC_EXPANSION_ENTRY:
1109 // Once we hit one of the source location entries, we're done.
1115 /// \brief If a header file is not found at the path that we expect it to be
1116 /// and the PCH file was moved from its original location, try to resolve the
1117 /// file by assuming that header+PCH were moved together and the header is in
1118 /// the same place relative to the PCH.
1120 resolveFileRelativeToOriginalDir(const std::string &Filename,
1121 const std::string &OriginalDir,
1122 const std::string &CurrDir) {
1123 assert(OriginalDir != CurrDir &&
1124 "No point trying to resolve the file if the PCH dir didn't change");
1125 using namespace llvm::sys;
1126 SmallString<128> filePath(Filename);
1127 fs::make_absolute(filePath);
1128 assert(path::is_absolute(OriginalDir));
1129 SmallString<128> currPCHPath(CurrDir);
1131 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)),
1132 fileDirE = path::end(path::parent_path(filePath));
1133 path::const_iterator origDirI = path::begin(OriginalDir),
1134 origDirE = path::end(OriginalDir);
1135 // Skip the common path components from filePath and OriginalDir.
1136 while (fileDirI != fileDirE && origDirI != origDirE &&
1137 *fileDirI == *origDirI) {
1141 for (; origDirI != origDirE; ++origDirI)
1142 path::append(currPCHPath, "..");
1143 path::append(currPCHPath, fileDirI, fileDirE);
1144 path::append(currPCHPath, path::filename(Filename));
1145 return currPCHPath.str();
1148 bool ASTReader::ReadSLocEntry(int ID) {
1152 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1153 Error("source location entry ID out-of-range for AST file");
1157 ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second;
1158 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]);
1159 BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
1160 unsigned BaseOffset = F->SLocEntryBaseOffset;
1162 ++NumSLocEntriesRead;
1163 llvm::BitstreamEntry Entry = SLocEntryCursor.advance();
1164 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1165 Error("incorrectly-formatted source location entry in AST file");
1171 switch (SLocEntryCursor.readRecord(Entry.ID, Record, &Blob)) {
1173 Error("incorrectly-formatted source location entry in AST file");
1176 case SM_SLOC_FILE_ENTRY: {
1177 // We will detect whether a file changed and return 'Failure' for it, but
1178 // we will also try to fail gracefully by setting up the SLocEntry.
1179 unsigned InputID = Record[4];
1180 InputFile IF = getInputFile(*F, InputID);
1181 const FileEntry *File = IF.getFile();
1182 bool OverriddenBuffer = IF.isOverridden();
1184 // Note that we only check if a File was returned. If it was out-of-date
1185 // we have complained but we will continue creating a FileID to recover
1190 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1191 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
1192 // This is the module's main file.
1193 IncludeLoc = getImportLocation(F);
1195 SrcMgr::CharacteristicKind
1196 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1197 FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter,
1198 ID, BaseOffset + Record[0]);
1199 SrcMgr::FileInfo &FileInfo =
1200 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
1201 FileInfo.NumCreatedFIDs = Record[5];
1203 FileInfo.setHasLineDirectives();
1205 const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
1206 unsigned NumFileDecls = Record[7];
1208 assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?");
1209 FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl,
1213 const SrcMgr::ContentCache *ContentCache
1214 = SourceMgr.getOrCreateContentCache(File,
1215 /*isSystemFile=*/FileCharacter != SrcMgr::C_User);
1216 if (OverriddenBuffer && !ContentCache->BufferOverridden &&
1217 ContentCache->ContentsEntry == ContentCache->OrigEntry) {
1218 unsigned Code = SLocEntryCursor.ReadCode();
1220 unsigned RecCode = SLocEntryCursor.readRecord(Code, Record, &Blob);
1222 if (RecCode != SM_SLOC_BUFFER_BLOB) {
1223 Error("AST record has invalid code");
1227 llvm::MemoryBuffer *Buffer
1228 = llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), File->getName());
1229 SourceMgr.overrideFileContents(File, Buffer);
1235 case SM_SLOC_BUFFER_ENTRY: {
1236 const char *Name = Blob.data();
1237 unsigned Offset = Record[0];
1238 SrcMgr::CharacteristicKind
1239 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1240 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1241 if (IncludeLoc.isInvalid() && F->Kind == MK_Module) {
1242 IncludeLoc = getImportLocation(F);
1244 unsigned Code = SLocEntryCursor.ReadCode();
1247 = SLocEntryCursor.readRecord(Code, Record, &Blob);
1249 if (RecCode != SM_SLOC_BUFFER_BLOB) {
1250 Error("AST record has invalid code");
1254 llvm::MemoryBuffer *Buffer
1255 = llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name);
1256 SourceMgr.createFileID(Buffer, FileCharacter, ID, BaseOffset + Offset,
1261 case SM_SLOC_EXPANSION_ENTRY: {
1262 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]);
1263 SourceMgr.createExpansionLoc(SpellingLoc,
1264 ReadSourceLocation(*F, Record[2]),
1265 ReadSourceLocation(*F, Record[3]),
1268 BaseOffset + Record[0]);
1276 std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
1278 return std::make_pair(SourceLocation(), "");
1280 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1281 Error("source location entry ID out-of-range for AST file");
1282 return std::make_pair(SourceLocation(), "");
1285 // Find which module file this entry lands in.
1286 ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second;
1287 if (M->Kind != MK_Module)
1288 return std::make_pair(SourceLocation(), "");
1290 // FIXME: Can we map this down to a particular submodule? That would be
1292 return std::make_pair(M->ImportLoc, StringRef(M->ModuleName));
1295 /// \brief Find the location where the module F is imported.
1296 SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
1297 if (F->ImportLoc.isValid())
1298 return F->ImportLoc;
1300 // Otherwise we have a PCH. It's considered to be "imported" at the first
1301 // location of its includer.
1302 if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
1303 // Main file is the importer.
1304 assert(!SourceMgr.getMainFileID().isInvalid() && "missing main file");
1305 return SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
1307 return F->ImportedBy[0]->FirstLoc;
1310 /// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
1311 /// specified cursor. Read the abbreviations that are at the top of the block
1312 /// and then leave the cursor pointing into the block.
1313 bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) {
1314 if (Cursor.EnterSubBlock(BlockID)) {
1315 Error("malformed block record in AST file");
1320 uint64_t Offset = Cursor.GetCurrentBitNo();
1321 unsigned Code = Cursor.ReadCode();
1323 // We expect all abbrevs to be at the start of the block.
1324 if (Code != llvm::bitc::DEFINE_ABBREV) {
1325 Cursor.JumpToBit(Offset);
1328 Cursor.ReadAbbrevRecord();
1332 Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record,
1336 Tok.setLocation(ReadSourceLocation(F, Record, Idx));
1337 Tok.setLength(Record[Idx++]);
1338 if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++]))
1339 Tok.setIdentifierInfo(II);
1340 Tok.setKind((tok::TokenKind)Record[Idx++]);
1341 Tok.setFlag((Token::TokenFlags)Record[Idx++]);
1345 MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
1346 BitstreamCursor &Stream = F.MacroCursor;
1348 // Keep track of where we are in the stream, then jump back there
1349 // after reading this macro.
1350 SavedStreamPosition SavedPosition(Stream);
1352 Stream.JumpToBit(Offset);
1354 SmallVector<IdentifierInfo*, 16> MacroArgs;
1355 MacroInfo *Macro = nullptr;
1358 // Advance to the next record, but if we get to the end of the block, don't
1359 // pop it (removing all the abbreviations from the cursor) since we want to
1360 // be able to reseek within the block and read entries.
1361 unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
1362 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(Flags);
1364 switch (Entry.Kind) {
1365 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1366 case llvm::BitstreamEntry::Error:
1367 Error("malformed block record in AST file");
1369 case llvm::BitstreamEntry::EndBlock:
1371 case llvm::BitstreamEntry::Record:
1372 // The interesting case.
1378 PreprocessorRecordTypes RecType =
1379 (PreprocessorRecordTypes)Stream.readRecord(Entry.ID, Record);
1381 case PP_MACRO_DIRECTIVE_HISTORY:
1384 case PP_MACRO_OBJECT_LIKE:
1385 case PP_MACRO_FUNCTION_LIKE: {
1386 // If we already have a macro, that means that we've hit the end
1387 // of the definition of the macro we were looking for. We're
1392 unsigned NextIndex = 1; // Skip identifier ID.
1393 SubmoduleID SubModID = getGlobalSubmoduleID(F, Record[NextIndex++]);
1394 SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex);
1395 MacroInfo *MI = PP.AllocateDeserializedMacroInfo(Loc, SubModID);
1396 MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex));
1397 MI->setIsUsed(Record[NextIndex++]);
1398 MI->setUsedForHeaderGuard(Record[NextIndex++]);
1400 if (RecType == PP_MACRO_FUNCTION_LIKE) {
1401 // Decode function-like macro info.
1402 bool isC99VarArgs = Record[NextIndex++];
1403 bool isGNUVarArgs = Record[NextIndex++];
1404 bool hasCommaPasting = Record[NextIndex++];
1406 unsigned NumArgs = Record[NextIndex++];
1407 for (unsigned i = 0; i != NumArgs; ++i)
1408 MacroArgs.push_back(getLocalIdentifier(F, Record[NextIndex++]));
1410 // Install function-like macro info.
1411 MI->setIsFunctionLike();
1412 if (isC99VarArgs) MI->setIsC99Varargs();
1413 if (isGNUVarArgs) MI->setIsGNUVarargs();
1414 if (hasCommaPasting) MI->setHasCommaPasting();
1415 MI->setArgumentList(MacroArgs.data(), MacroArgs.size(),
1416 PP.getPreprocessorAllocator());
1419 // Remember that we saw this macro last so that we add the tokens that
1420 // form its body to it.
1423 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
1424 Record[NextIndex]) {
1425 // We have a macro definition. Register the association
1426 PreprocessedEntityID
1427 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]);
1428 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
1429 PreprocessingRecord::PPEntityID
1430 PPID = PPRec.getPPEntityID(GlobalID-1, /*isLoaded=*/true);
1431 MacroDefinition *PPDef =
1432 cast_or_null<MacroDefinition>(PPRec.getPreprocessedEntity(PPID));
1434 PPRec.RegisterMacroDefinition(Macro, PPDef);
1442 // If we see a TOKEN before a PP_MACRO_*, then the file is
1443 // erroneous, just pretend we didn't see this.
1447 Token Tok = ReadToken(F, Record, Idx);
1448 Macro->AddTokenToBody(Tok);
1455 PreprocessedEntityID
1456 ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M, unsigned LocalID) const {
1457 ContinuousRangeMap<uint32_t, int, 2>::const_iterator
1458 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS);
1459 assert(I != M.PreprocessedEntityRemap.end()
1460 && "Invalid index into preprocessed entity index remap");
1462 return LocalID + I->second;
1465 unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
1466 return llvm::hash_combine(ikey.Size, ikey.ModTime);
1469 HeaderFileInfoTrait::internal_key_type
1470 HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) {
1471 internal_key_type ikey = { FE->getSize(), FE->getModificationTime(),
1476 bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
1477 if (a.Size != b.Size || a.ModTime != b.ModTime)
1480 if (strcmp(a.Filename, b.Filename) == 0)
1483 // Determine whether the actual files are equivalent.
1484 FileManager &FileMgr = Reader.getFileManager();
1485 const FileEntry *FEA = FileMgr.getFile(a.Filename);
1486 const FileEntry *FEB = FileMgr.getFile(b.Filename);
1487 return (FEA && FEA == FEB);
1490 std::pair<unsigned, unsigned>
1491 HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
1492 using namespace llvm::support;
1493 unsigned KeyLen = (unsigned) endian::readNext<uint16_t, little, unaligned>(d);
1494 unsigned DataLen = (unsigned) *d++;
1495 return std::make_pair(KeyLen, DataLen);
1498 HeaderFileInfoTrait::internal_key_type
1499 HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
1500 using namespace llvm::support;
1501 internal_key_type ikey;
1502 ikey.Size = off_t(endian::readNext<uint64_t, little, unaligned>(d));
1503 ikey.ModTime = time_t(endian::readNext<uint64_t, little, unaligned>(d));
1504 ikey.Filename = (const char *)d;
1508 HeaderFileInfoTrait::data_type
1509 HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
1511 const unsigned char *End = d + DataLen;
1512 using namespace llvm::support;
1514 unsigned Flags = *d++;
1515 HFI.HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>
1516 ((Flags >> 6) & 0x03);
1517 HFI.isImport = (Flags >> 5) & 0x01;
1518 HFI.isPragmaOnce = (Flags >> 4) & 0x01;
1519 HFI.DirInfo = (Flags >> 2) & 0x03;
1520 HFI.Resolved = (Flags >> 1) & 0x01;
1521 HFI.IndexHeaderMapHeader = Flags & 0x01;
1522 HFI.NumIncludes = endian::readNext<uint16_t, little, unaligned>(d);
1523 HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
1524 M, endian::readNext<uint32_t, little, unaligned>(d));
1525 if (unsigned FrameworkOffset =
1526 endian::readNext<uint32_t, little, unaligned>(d)) {
1527 // The framework offset is 1 greater than the actual offset,
1528 // since 0 is used as an indicator for "no framework name".
1529 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
1530 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName);
1534 uint32_t LocalSMID = endian::readNext<uint32_t, little, unaligned>(d);
1536 // This header is part of a module. Associate it with the module to enable
1537 // implicit module import.
1538 SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID);
1539 Module *Mod = Reader.getSubmodule(GlobalSMID);
1540 HFI.isModuleHeader = true;
1541 FileManager &FileMgr = Reader.getFileManager();
1543 Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1544 ModMap.addHeader(Mod, FileMgr.getFile(key.Filename), HFI.getHeaderRole());
1548 assert(End == d && "Wrong data length in HeaderFileInfo deserialization");
1551 // This HeaderFileInfo was externally loaded.
1552 HFI.External = true;
1557 ASTReader::addPendingMacroFromModule(IdentifierInfo *II, ModuleFile *M,
1558 GlobalMacroID GMacID,
1559 ArrayRef<SubmoduleID> Overrides) {
1560 assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard");
1561 SubmoduleID *OverrideData = nullptr;
1562 if (!Overrides.empty()) {
1563 OverrideData = new (Context) SubmoduleID[Overrides.size() + 1];
1564 OverrideData[0] = Overrides.size();
1565 for (unsigned I = 0; I != Overrides.size(); ++I)
1566 OverrideData[I + 1] = getGlobalSubmoduleID(*M, Overrides[I]);
1568 PendingMacroIDs[II].push_back(PendingMacroInfo(M, GMacID, OverrideData));
1571 void ASTReader::addPendingMacroFromPCH(IdentifierInfo *II,
1573 uint64_t MacroDirectivesOffset) {
1574 assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard");
1575 PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset));
1578 void ASTReader::ReadDefinedMacros() {
1579 // Note that we are loading defined macros.
1580 Deserializing Macros(this);
1582 for (ModuleReverseIterator I = ModuleMgr.rbegin(),
1583 E = ModuleMgr.rend(); I != E; ++I) {
1584 BitstreamCursor &MacroCursor = (*I)->MacroCursor;
1586 // If there was no preprocessor block, skip this file.
1587 if (!MacroCursor.getBitStreamReader())
1590 BitstreamCursor Cursor = MacroCursor;
1591 Cursor.JumpToBit((*I)->MacroStartOffset);
1595 llvm::BitstreamEntry E = Cursor.advanceSkippingSubblocks();
1598 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1599 case llvm::BitstreamEntry::Error:
1600 Error("malformed block record in AST file");
1602 case llvm::BitstreamEntry::EndBlock:
1605 case llvm::BitstreamEntry::Record:
1607 switch (Cursor.readRecord(E.ID, Record)) {
1608 default: // Default behavior: ignore.
1611 case PP_MACRO_OBJECT_LIKE:
1612 case PP_MACRO_FUNCTION_LIKE:
1613 getLocalIdentifier(**I, Record[0]);
1628 /// \brief Visitor class used to look up identifirs in an AST file.
1629 class IdentifierLookupVisitor {
1631 unsigned PriorGeneration;
1632 unsigned &NumIdentifierLookups;
1633 unsigned &NumIdentifierLookupHits;
1634 IdentifierInfo *Found;
1637 IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
1638 unsigned &NumIdentifierLookups,
1639 unsigned &NumIdentifierLookupHits)
1640 : Name(Name), PriorGeneration(PriorGeneration),
1641 NumIdentifierLookups(NumIdentifierLookups),
1642 NumIdentifierLookupHits(NumIdentifierLookupHits),
1647 static bool visit(ModuleFile &M, void *UserData) {
1648 IdentifierLookupVisitor *This
1649 = static_cast<IdentifierLookupVisitor *>(UserData);
1651 // If we've already searched this module file, skip it now.
1652 if (M.Generation <= This->PriorGeneration)
1655 ASTIdentifierLookupTable *IdTable
1656 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
1660 ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(),
1662 ++This->NumIdentifierLookups;
1663 ASTIdentifierLookupTable::iterator Pos = IdTable->find(This->Name,&Trait);
1664 if (Pos == IdTable->end())
1667 // Dereferencing the iterator has the effect of building the
1668 // IdentifierInfo node and populating it with the various
1669 // declarations it needs.
1670 ++This->NumIdentifierLookupHits;
1675 // \brief Retrieve the identifier info found within the module
1677 IdentifierInfo *getIdentifierInfo() const { return Found; }
1681 void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
1682 // Note that we are loading an identifier.
1683 Deserializing AnIdentifier(this);
1685 unsigned PriorGeneration = 0;
1686 if (getContext().getLangOpts().Modules)
1687 PriorGeneration = IdentifierGeneration[&II];
1689 // If there is a global index, look there first to determine which modules
1690 // provably do not have any results for this identifier.
1691 GlobalModuleIndex::HitSet Hits;
1692 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
1693 if (!loadGlobalIndex()) {
1694 if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
1699 IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
1700 NumIdentifierLookups,
1701 NumIdentifierLookupHits);
1702 ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor, HitsPtr);
1703 markIdentifierUpToDate(&II);
1706 void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
1710 II->setOutOfDate(false);
1712 // Update the generation for this identifier.
1713 if (getContext().getLangOpts().Modules)
1714 IdentifierGeneration[II] = getGeneration();
1717 struct ASTReader::ModuleMacroInfo {
1718 SubmoduleID SubModID;
1720 SubmoduleID *Overrides;
1721 // FIXME: Remove this.
1724 bool isDefine() const { return MI; }
1726 SubmoduleID getSubmoduleID() const { return SubModID; }
1728 ArrayRef<SubmoduleID> getOverriddenSubmodules() const {
1731 return llvm::makeArrayRef(Overrides + 1, *Overrides);
1734 MacroDirective *import(Preprocessor &PP, SourceLocation ImportLoc) const {
1736 return PP.AllocateUndefMacroDirective(ImportLoc, SubModID,
1737 getOverriddenSubmodules());
1738 return PP.AllocateDefMacroDirective(MI, ImportLoc, SubModID,
1739 getOverriddenSubmodules());
1743 ASTReader::ModuleMacroInfo *
1744 ASTReader::getModuleMacro(const PendingMacroInfo &PMInfo) {
1745 ModuleMacroInfo Info;
1747 uint32_t ID = PMInfo.ModuleMacroData.MacID;
1749 // Macro undefinition.
1750 Info.SubModID = getGlobalSubmoduleID(*PMInfo.M, ID >> 1);
1753 // Macro definition.
1754 GlobalMacroID GMacID = getGlobalMacroID(*PMInfo.M, ID >> 1);
1757 // If this macro has already been loaded, don't do so again.
1758 // FIXME: This is highly dubious. Multiple macro definitions can have the
1759 // same MacroInfo (and hence the same GMacID) due to #pragma push_macro etc.
1760 if (MacrosLoaded[GMacID - NUM_PREDEF_MACRO_IDS])
1763 Info.MI = getMacro(GMacID);
1764 Info.SubModID = Info.MI->getOwningModuleID();
1766 Info.Overrides = PMInfo.ModuleMacroData.Overrides;
1769 return new (Context) ModuleMacroInfo(Info);
1772 void ASTReader::resolvePendingMacro(IdentifierInfo *II,
1773 const PendingMacroInfo &PMInfo) {
1776 if (PMInfo.M->Kind != MK_Module) {
1777 installPCHMacroDirectives(II, *PMInfo.M,
1778 PMInfo.PCHMacroData.MacroDirectivesOffset);
1784 ModuleMacroInfo *MMI = getModuleMacro(PMInfo);
1788 Module *Owner = getSubmodule(MMI->getSubmoduleID());
1789 if (Owner && Owner->NameVisibility == Module::Hidden) {
1790 // Macros in the owning module are hidden. Just remember this macro to
1791 // install if we make this module visible.
1792 HiddenNamesMap[Owner].HiddenMacros.insert(std::make_pair(II, MMI));
1794 installImportedMacro(II, MMI, Owner);
1798 void ASTReader::installPCHMacroDirectives(IdentifierInfo *II,
1799 ModuleFile &M, uint64_t Offset) {
1800 assert(M.Kind != MK_Module);
1802 BitstreamCursor &Cursor = M.MacroCursor;
1803 SavedStreamPosition SavedPosition(Cursor);
1804 Cursor.JumpToBit(Offset);
1806 llvm::BitstreamEntry Entry =
1807 Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
1808 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1809 Error("malformed block record in AST file");
1814 PreprocessorRecordTypes RecType =
1815 (PreprocessorRecordTypes)Cursor.readRecord(Entry.ID, Record);
1816 if (RecType != PP_MACRO_DIRECTIVE_HISTORY) {
1817 Error("malformed block record in AST file");
1821 // Deserialize the macro directives history in reverse source-order.
1822 MacroDirective *Latest = nullptr, *Earliest = nullptr;
1823 unsigned Idx = 0, N = Record.size();
1825 MacroDirective *MD = nullptr;
1826 SourceLocation Loc = ReadSourceLocation(M, Record, Idx);
1827 MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
1829 case MacroDirective::MD_Define: {
1830 GlobalMacroID GMacID = getGlobalMacroID(M, Record[Idx++]);
1831 MacroInfo *MI = getMacro(GMacID);
1832 SubmoduleID ImportedFrom = Record[Idx++];
1833 bool IsAmbiguous = Record[Idx++];
1834 llvm::SmallVector<unsigned, 4> Overrides;
1836 Overrides.insert(Overrides.end(),
1837 &Record[Idx] + 1, &Record[Idx] + 1 + Record[Idx]);
1838 Idx += Overrides.size() + 1;
1840 DefMacroDirective *DefMD =
1841 PP.AllocateDefMacroDirective(MI, Loc, ImportedFrom, Overrides);
1842 DefMD->setAmbiguous(IsAmbiguous);
1846 case MacroDirective::MD_Undefine: {
1847 SubmoduleID ImportedFrom = Record[Idx++];
1848 llvm::SmallVector<unsigned, 4> Overrides;
1850 Overrides.insert(Overrides.end(),
1851 &Record[Idx] + 1, &Record[Idx] + 1 + Record[Idx]);
1852 Idx += Overrides.size() + 1;
1854 MD = PP.AllocateUndefMacroDirective(Loc, ImportedFrom, Overrides);
1857 case MacroDirective::MD_Visibility:
1858 bool isPublic = Record[Idx++];
1859 MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
1866 Earliest->setPrevious(MD);
1870 PP.setLoadedMacroDirective(II, Latest);
1873 /// \brief For the given macro definitions, check if they are both in system
1875 static bool areDefinedInSystemModules(MacroInfo *PrevMI, MacroInfo *NewMI,
1876 Module *NewOwner, ASTReader &Reader) {
1877 assert(PrevMI && NewMI);
1878 Module *PrevOwner = nullptr;
1879 if (SubmoduleID PrevModID = PrevMI->getOwningModuleID())
1880 PrevOwner = Reader.getSubmodule(PrevModID);
1881 SourceManager &SrcMgr = Reader.getSourceManager();
1883 = PrevOwner? PrevOwner->IsSystem
1884 : SrcMgr.isInSystemHeader(PrevMI->getDefinitionLoc());
1886 = NewOwner? NewOwner->IsSystem
1887 : SrcMgr.isInSystemHeader(NewMI->getDefinitionLoc());
1888 if (PrevOwner && PrevOwner == NewOwner)
1890 return PrevInSystem && NewInSystem;
1893 void ASTReader::removeOverriddenMacros(IdentifierInfo *II,
1894 SourceLocation ImportLoc,
1895 AmbiguousMacros &Ambig,
1896 ArrayRef<SubmoduleID> Overrides) {
1897 for (unsigned OI = 0, ON = Overrides.size(); OI != ON; ++OI) {
1898 SubmoduleID OwnerID = Overrides[OI];
1900 // If this macro is not yet visible, remove it from the hidden names list.
1901 // It won't be there if we're in the middle of making the owner visible.
1902 Module *Owner = getSubmodule(OwnerID);
1903 auto HiddenIt = HiddenNamesMap.find(Owner);
1904 if (HiddenIt != HiddenNamesMap.end()) {
1905 HiddenNames &Hidden = HiddenIt->second;
1906 HiddenMacrosMap::iterator HI = Hidden.HiddenMacros.find(II);
1907 if (HI != Hidden.HiddenMacros.end()) {
1908 // Register the macro now so we don't lose it when we re-export.
1909 PP.appendMacroDirective(II, HI->second->import(PP, ImportLoc));
1911 auto SubOverrides = HI->second->getOverriddenSubmodules();
1912 Hidden.HiddenMacros.erase(HI);
1913 removeOverriddenMacros(II, ImportLoc, Ambig, SubOverrides);
1917 // If this macro is already in our list of conflicts, remove it from there.
1919 std::remove_if(Ambig.begin(), Ambig.end(), [&](DefMacroDirective *MD) {
1920 return MD->getInfo()->getOwningModuleID() == OwnerID;
1926 ASTReader::AmbiguousMacros *
1927 ASTReader::removeOverriddenMacros(IdentifierInfo *II,
1928 SourceLocation ImportLoc,
1929 ArrayRef<SubmoduleID> Overrides) {
1930 MacroDirective *Prev = PP.getMacroDirective(II);
1931 if (!Prev && Overrides.empty())
1934 DefMacroDirective *PrevDef = Prev ? Prev->getDefinition().getDirective()
1936 if (PrevDef && PrevDef->isAmbiguous()) {
1937 // We had a prior ambiguity. Check whether we resolve it (or make it worse).
1938 AmbiguousMacros &Ambig = AmbiguousMacroDefs[II];
1939 Ambig.push_back(PrevDef);
1941 removeOverriddenMacros(II, ImportLoc, Ambig, Overrides);
1946 AmbiguousMacroDefs.erase(II);
1948 // There's no ambiguity yet. Maybe we're introducing one.
1949 AmbiguousMacros Ambig;
1951 Ambig.push_back(PrevDef);
1953 removeOverriddenMacros(II, ImportLoc, Ambig, Overrides);
1955 if (!Ambig.empty()) {
1956 AmbiguousMacros &Result = AmbiguousMacroDefs[II];
1957 std::swap(Result, Ambig);
1962 // We ended up with no ambiguity.
1966 void ASTReader::installImportedMacro(IdentifierInfo *II, ModuleMacroInfo *MMI,
1968 assert(II && Owner);
1970 SourceLocation ImportLoc = Owner->MacroVisibilityLoc;
1971 if (ImportLoc.isInvalid()) {
1972 // FIXME: If we made macros from this module visible but didn't provide a
1973 // source location for the import, we don't have a location for the macro.
1974 // Use the location at which the containing module file was first imported
1976 ImportLoc = MMI->F->DirectImportLoc;
1977 assert(ImportLoc.isValid() && "no import location for a visible macro?");
1980 AmbiguousMacros *Prev =
1981 removeOverriddenMacros(II, ImportLoc, MMI->getOverriddenSubmodules());
1983 // Create a synthetic macro definition corresponding to the import (or null
1984 // if this was an undefinition of the macro).
1985 MacroDirective *Imported = MMI->import(PP, ImportLoc);
1986 DefMacroDirective *MD = dyn_cast<DefMacroDirective>(Imported);
1988 // If there's no ambiguity, just install the macro.
1990 PP.appendMacroDirective(II, Imported);
1993 assert(!Prev->empty());
1996 // We imported a #undef that didn't remove all prior definitions. The most
1997 // recent prior definition remains, and we install it in the place of the
1998 // imported directive, as if by a local #pragma pop_macro.
1999 MacroInfo *NewMI = Prev->back()->getInfo();
2001 MD = PP.AllocateDefMacroDirective(NewMI, ImportLoc);
2003 // Install our #undef first so that we don't lose track of it. We'll replace
2004 // this with whichever macro definition ends up winning.
2005 PP.appendMacroDirective(II, Imported);
2008 // We're introducing a macro definition that creates or adds to an ambiguity.
2009 // We can resolve that ambiguity if this macro is token-for-token identical to
2010 // all of the existing definitions.
2011 MacroInfo *NewMI = MD->getInfo();
2012 assert(NewMI && "macro definition with no MacroInfo?");
2013 while (!Prev->empty()) {
2014 MacroInfo *PrevMI = Prev->back()->getInfo();
2015 assert(PrevMI && "macro definition with no MacroInfo?");
2017 // Before marking the macros as ambiguous, check if this is a case where
2018 // both macros are in system headers. If so, we trust that the system
2019 // did not get it wrong. This also handles cases where Clang's own
2020 // headers have a different spelling of certain system macros:
2021 // #define LONG_MAX __LONG_MAX__ (clang's limits.h)
2022 // #define LONG_MAX 0x7fffffffffffffffL (system's limits.h)
2024 // FIXME: Remove the defined-in-system-headers check. clang's limits.h
2025 // overrides the system limits.h's macros, so there's no conflict here.
2026 if (NewMI != PrevMI &&
2027 !PrevMI->isIdenticalTo(*NewMI, PP, /*Syntactically=*/true) &&
2028 !areDefinedInSystemModules(PrevMI, NewMI, Owner, *this))
2031 // The previous definition is the same as this one (or both are defined in
2032 // system modules so we can assume they're equivalent); we don't need to
2033 // track it any more.
2038 MD->setAmbiguous(true);
2040 PP.appendMacroDirective(II, MD);
2043 ASTReader::InputFileInfo
2044 ASTReader::readInputFileInfo(ModuleFile &F, unsigned ID) {
2045 // Go find this input file.
2046 BitstreamCursor &Cursor = F.InputFilesCursor;
2047 SavedStreamPosition SavedPosition(Cursor);
2048 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2050 unsigned Code = Cursor.ReadCode();
2054 unsigned Result = Cursor.readRecord(Code, Record, &Blob);
2055 assert(static_cast<InputFileRecordTypes>(Result) == INPUT_FILE &&
2056 "invalid record type for input file");
2059 std::string Filename;
2064 assert(Record[0] == ID && "Bogus stored ID or offset");
2065 StoredSize = static_cast<off_t>(Record[1]);
2066 StoredTime = static_cast<time_t>(Record[2]);
2067 Overridden = static_cast<bool>(Record[3]);
2069 MaybeAddSystemRootToFilename(F, Filename);
2071 InputFileInfo R = { std::move(Filename), StoredSize, StoredTime, Overridden };
2075 std::string ASTReader::getInputFileName(ModuleFile &F, unsigned int ID) {
2076 return readInputFileInfo(F, ID).Filename;
2079 InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
2080 // If this ID is bogus, just return an empty input file.
2081 if (ID == 0 || ID > F.InputFilesLoaded.size())
2084 // If we've already loaded this input file, return it.
2085 if (F.InputFilesLoaded[ID-1].getFile())
2086 return F.InputFilesLoaded[ID-1];
2088 if (F.InputFilesLoaded[ID-1].isNotFound())
2091 // Go find this input file.
2092 BitstreamCursor &Cursor = F.InputFilesCursor;
2093 SavedStreamPosition SavedPosition(Cursor);
2094 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2096 InputFileInfo FI = readInputFileInfo(F, ID);
2097 off_t StoredSize = FI.StoredSize;
2098 time_t StoredTime = FI.StoredTime;
2099 bool Overridden = FI.Overridden;
2100 StringRef Filename = FI.Filename;
2102 const FileEntry *File
2103 = Overridden? FileMgr.getVirtualFile(Filename, StoredSize, StoredTime)
2104 : FileMgr.getFile(Filename, /*OpenFile=*/false);
2106 // If we didn't find the file, resolve it relative to the
2107 // original directory from which this AST file was created.
2108 if (File == nullptr && !F.OriginalDir.empty() && !CurrentDir.empty() &&
2109 F.OriginalDir != CurrentDir) {
2110 std::string Resolved = resolveFileRelativeToOriginalDir(Filename,
2113 if (!Resolved.empty())
2114 File = FileMgr.getFile(Resolved);
2117 // For an overridden file, create a virtual file with the stored
2119 if (Overridden && File == nullptr) {
2120 File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime);
2123 if (File == nullptr) {
2125 std::string ErrorStr = "could not find file '";
2126 ErrorStr += Filename;
2127 ErrorStr += "' referenced by AST file";
2128 Error(ErrorStr.c_str());
2130 // Record that we didn't find the file.
2131 F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
2135 // Check if there was a request to override the contents of the file
2136 // that was part of the precompiled header. Overridding such a file
2137 // can lead to problems when lexing using the source locations from the
2139 SourceManager &SM = getSourceManager();
2140 if (!Overridden && SM.isFileOverridden(File)) {
2142 Error(diag::err_fe_pch_file_overridden, Filename);
2143 // After emitting the diagnostic, recover by disabling the override so
2144 // that the original file will be used.
2145 SM.disableFileContentsOverride(File);
2146 // The FileEntry is a virtual file entry with the size of the contents
2147 // that would override the original contents. Set it to the original's
2149 FileMgr.modifyFileEntry(const_cast<FileEntry*>(File),
2150 StoredSize, StoredTime);
2153 bool IsOutOfDate = false;
2155 // For an overridden file, there is nothing to validate.
2156 if (!Overridden && (StoredSize != File->getSize()
2157 #if !defined(LLVM_ON_WIN32)
2158 // In our regression testing, the Windows file system seems to
2159 // have inconsistent modification times that sometimes
2160 // erroneously trigger this error-handling path.
2161 || StoredTime != File->getModificationTime()
2165 // Build a list of the PCH imports that got us here (in reverse).
2166 SmallVector<ModuleFile *, 4> ImportStack(1, &F);
2167 while (ImportStack.back()->ImportedBy.size() > 0)
2168 ImportStack.push_back(ImportStack.back()->ImportedBy[0]);
2170 // The top-level PCH is stale.
2171 StringRef TopLevelPCHName(ImportStack.back()->FileName);
2172 Error(diag::err_fe_pch_file_modified, Filename, TopLevelPCHName);
2174 // Print the import stack.
2175 if (ImportStack.size() > 1 && !Diags.isDiagnosticInFlight()) {
2176 Diag(diag::note_pch_required_by)
2177 << Filename << ImportStack[0]->FileName;
2178 for (unsigned I = 1; I < ImportStack.size(); ++I)
2179 Diag(diag::note_pch_required_by)
2180 << ImportStack[I-1]->FileName << ImportStack[I]->FileName;
2183 if (!Diags.isDiagnosticInFlight())
2184 Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
2190 InputFile IF = InputFile(File, Overridden, IsOutOfDate);
2192 // Note that we've loaded this input file.
2193 F.InputFilesLoaded[ID-1] = IF;
2197 const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) {
2198 ModuleFile &M = ModuleMgr.getPrimaryModule();
2199 std::string Filename = filenameStrRef;
2200 MaybeAddSystemRootToFilename(M, Filename);
2201 const FileEntry *File = FileMgr.getFile(Filename);
2202 if (File == nullptr && !M.OriginalDir.empty() && !CurrentDir.empty() &&
2203 M.OriginalDir != CurrentDir) {
2204 std::string resolved = resolveFileRelativeToOriginalDir(Filename,
2207 if (!resolved.empty())
2208 File = FileMgr.getFile(resolved);
2214 /// \brief If we are loading a relocatable PCH file, and the filename is
2215 /// not an absolute path, add the system root to the beginning of the file
2217 void ASTReader::MaybeAddSystemRootToFilename(ModuleFile &M,
2218 std::string &Filename) {
2219 // If this is not a relocatable PCH file, there's nothing to do.
2220 if (!M.RelocatablePCH)
2223 if (Filename.empty() || llvm::sys::path::is_absolute(Filename))
2226 if (isysroot.empty()) {
2227 // If no system root was given, default to '/'
2228 Filename.insert(Filename.begin(), '/');
2232 unsigned Length = isysroot.size();
2233 if (isysroot[Length - 1] != '/')
2234 Filename.insert(Filename.begin(), '/');
2236 Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end());
2239 ASTReader::ASTReadResult
2240 ASTReader::ReadControlBlock(ModuleFile &F,
2241 SmallVectorImpl<ImportedModule> &Loaded,
2242 const ModuleFile *ImportedBy,
2243 unsigned ClientLoadCapabilities) {
2244 BitstreamCursor &Stream = F.Stream;
2246 if (Stream.EnterSubBlock(CONTROL_BLOCK_ID)) {
2247 Error("malformed block record in AST file");
2251 // Read all of the records and blocks in the control block.
2254 llvm::BitstreamEntry Entry = Stream.advance();
2256 switch (Entry.Kind) {
2257 case llvm::BitstreamEntry::Error:
2258 Error("malformed block record in AST file");
2260 case llvm::BitstreamEntry::EndBlock: {
2261 // Validate input files.
2262 const HeaderSearchOptions &HSOpts =
2263 PP.getHeaderSearchInfo().getHeaderSearchOpts();
2265 // All user input files reside at the index range [0, Record[1]), and
2266 // system input files reside at [Record[1], Record[0]).
2267 // Record is the one from INPUT_FILE_OFFSETS.
2268 unsigned NumInputs = Record[0];
2269 unsigned NumUserInputs = Record[1];
2271 if (!DisableValidation &&
2272 (ValidateSystemInputs || !HSOpts.ModulesValidateOncePerBuildSession ||
2273 F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp)) {
2274 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2276 // If we are reading a module, we will create a verification timestamp,
2277 // so we verify all input files. Otherwise, verify only user input
2280 unsigned N = NumUserInputs;
2281 if (ValidateSystemInputs ||
2282 (HSOpts.ModulesValidateOncePerBuildSession && F.Kind == MK_Module))
2285 for (unsigned I = 0; I < N; ++I) {
2286 InputFile IF = getInputFile(F, I+1, Complain);
2287 if (!IF.getFile() || IF.isOutOfDate())
2293 Listener->visitModuleFile(F.FileName);
2295 if (Listener && Listener->needsInputFileVisitation()) {
2296 unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2298 for (unsigned I = 0; I < N; ++I) {
2299 bool IsSystem = I >= NumUserInputs;
2300 InputFileInfo FI = readInputFileInfo(F, I+1);
2301 Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden);
2308 case llvm::BitstreamEntry::SubBlock:
2310 case INPUT_FILES_BLOCK_ID:
2311 F.InputFilesCursor = Stream;
2312 if (Stream.SkipBlock() || // Skip with the main cursor
2313 // Read the abbreviations
2314 ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
2315 Error("malformed block record in AST file");
2321 if (Stream.SkipBlock()) {
2322 Error("malformed block record in AST file");
2328 case llvm::BitstreamEntry::Record:
2329 // The interesting case.
2333 // Read and process a record.
2336 switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2338 if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2339 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2340 Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2341 : diag::err_pch_version_too_new);
2342 return VersionMismatch;
2345 bool hasErrors = Record[5];
2346 if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
2347 Diag(diag::err_pch_with_compiler_errors);
2351 F.RelocatablePCH = Record[4];
2353 const std::string &CurBranch = getClangFullRepositoryVersion();
2354 StringRef ASTBranch = Blob;
2355 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
2356 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2357 Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
2358 return VersionMismatch;
2364 // Load each of the imported PCH files.
2365 unsigned Idx = 0, N = Record.size();
2367 // Read information about the AST file.
2368 ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
2369 // The import location will be the local one for now; we will adjust
2370 // all import locations of module imports after the global source
2371 // location info are setup.
2372 SourceLocation ImportLoc =
2373 SourceLocation::getFromRawEncoding(Record[Idx++]);
2374 off_t StoredSize = (off_t)Record[Idx++];
2375 time_t StoredModTime = (time_t)Record[Idx++];
2376 unsigned Length = Record[Idx++];
2377 SmallString<128> ImportedFile(Record.begin() + Idx,
2378 Record.begin() + Idx + Length);
2381 // Load the AST file.
2382 switch(ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F, Loaded,
2383 StoredSize, StoredModTime,
2384 ClientLoadCapabilities)) {
2385 case Failure: return Failure;
2386 // If we have to ignore the dependency, we'll have to ignore this too.
2388 case OutOfDate: return OutOfDate;
2389 case VersionMismatch: return VersionMismatch;
2390 case ConfigurationMismatch: return ConfigurationMismatch;
2391 case HadErrors: return HadErrors;
2392 case Success: break;
2398 case LANGUAGE_OPTIONS: {
2399 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2400 if (Listener && &F == *ModuleMgr.begin() &&
2401 ParseLanguageOptions(Record, Complain, *Listener) &&
2402 !DisableValidation && !AllowConfigurationMismatch)
2403 return ConfigurationMismatch;
2407 case TARGET_OPTIONS: {
2408 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0;
2409 if (Listener && &F == *ModuleMgr.begin() &&
2410 ParseTargetOptions(Record, Complain, *Listener) &&
2411 !DisableValidation && !AllowConfigurationMismatch)
2412 return ConfigurationMismatch;
2416 case DIAGNOSTIC_OPTIONS: {
2417 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate)==0;
2418 if (Listener && &F == *ModuleMgr.begin() &&
2419 ParseDiagnosticOptions(Record, Complain, *Listener) &&
2425 case FILE_SYSTEM_OPTIONS: {
2426 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0;
2427 if (Listener && &F == *ModuleMgr.begin() &&
2428 ParseFileSystemOptions(Record, Complain, *Listener) &&
2429 !DisableValidation && !AllowConfigurationMismatch)
2430 return ConfigurationMismatch;
2434 case HEADER_SEARCH_OPTIONS: {
2435 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0;
2436 if (Listener && &F == *ModuleMgr.begin() &&
2437 ParseHeaderSearchOptions(Record, Complain, *Listener) &&
2438 !DisableValidation && !AllowConfigurationMismatch)
2439 return ConfigurationMismatch;
2443 case PREPROCESSOR_OPTIONS: {
2444 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0;
2445 if (Listener && &F == *ModuleMgr.begin() &&
2446 ParsePreprocessorOptions(Record, Complain, *Listener,
2447 SuggestedPredefines) &&
2448 !DisableValidation && !AllowConfigurationMismatch)
2449 return ConfigurationMismatch;
2454 F.OriginalSourceFileID = FileID::get(Record[0]);
2455 F.ActualOriginalSourceFileName = Blob;
2456 F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
2457 MaybeAddSystemRootToFilename(F, F.OriginalSourceFileName);
2460 case ORIGINAL_FILE_ID:
2461 F.OriginalSourceFileID = FileID::get(Record[0]);
2464 case ORIGINAL_PCH_DIR:
2465 F.OriginalDir = Blob;
2469 F.ModuleName = Blob;
2471 Listener->ReadModuleName(F.ModuleName);
2474 case MODULE_MAP_FILE:
2475 if (ASTReadResult Result =
2476 ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
2478 case INPUT_FILE_OFFSETS:
2479 F.InputFileOffsets = (const uint32_t *)Blob.data();
2480 F.InputFilesLoaded.resize(Record[0]);
2486 ASTReader::ASTReadResult
2487 ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
2488 BitstreamCursor &Stream = F.Stream;
2490 if (Stream.EnterSubBlock(AST_BLOCK_ID)) {
2491 Error("malformed block record in AST file");
2495 // Read all of the records and blocks for the AST file.
2498 llvm::BitstreamEntry Entry = Stream.advance();
2500 switch (Entry.Kind) {
2501 case llvm::BitstreamEntry::Error:
2502 Error("error at end of module block in AST file");
2504 case llvm::BitstreamEntry::EndBlock: {
2505 // Outside of C++, we do not store a lookup map for the translation unit.
2506 // Instead, mark it as needing a lookup map to be built if this module
2507 // contains any declarations lexically within it (which it always does!).
2508 // This usually has no cost, since we very rarely need the lookup map for
2509 // the translation unit outside C++.
2510 DeclContext *DC = Context.getTranslationUnitDecl();
2511 if (DC->hasExternalLexicalStorage() &&
2512 !getContext().getLangOpts().CPlusPlus)
2513 DC->setMustBuildLookupTable();
2517 case llvm::BitstreamEntry::SubBlock:
2519 case DECLTYPES_BLOCK_ID:
2520 // We lazily load the decls block, but we want to set up the
2521 // DeclsCursor cursor to point into it. Clone our current bitcode
2522 // cursor to it, enter the block and read the abbrevs in that block.
2523 // With the main cursor, we just skip over it.
2524 F.DeclsCursor = Stream;
2525 if (Stream.SkipBlock() || // Skip with the main cursor.
2526 // Read the abbrevs.
2527 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
2528 Error("malformed block record in AST file");
2533 case PREPROCESSOR_BLOCK_ID:
2534 F.MacroCursor = Stream;
2535 if (!PP.getExternalSource())
2536 PP.setExternalSource(this);
2538 if (Stream.SkipBlock() ||
2539 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
2540 Error("malformed block record in AST file");
2543 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
2546 case PREPROCESSOR_DETAIL_BLOCK_ID:
2547 F.PreprocessorDetailCursor = Stream;
2548 if (Stream.SkipBlock() ||
2549 ReadBlockAbbrevs(F.PreprocessorDetailCursor,
2550 PREPROCESSOR_DETAIL_BLOCK_ID)) {
2551 Error("malformed preprocessor detail record in AST file");
2554 F.PreprocessorDetailStartOffset
2555 = F.PreprocessorDetailCursor.GetCurrentBitNo();
2557 if (!PP.getPreprocessingRecord())
2558 PP.createPreprocessingRecord();
2559 if (!PP.getPreprocessingRecord()->getExternalSource())
2560 PP.getPreprocessingRecord()->SetExternalSource(*this);
2563 case SOURCE_MANAGER_BLOCK_ID:
2564 if (ReadSourceManagerBlock(F))
2568 case SUBMODULE_BLOCK_ID:
2569 if (ASTReadResult Result = ReadSubmoduleBlock(F, ClientLoadCapabilities))
2573 case COMMENTS_BLOCK_ID: {
2574 BitstreamCursor C = Stream;
2575 if (Stream.SkipBlock() ||
2576 ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
2577 Error("malformed comments block in AST file");
2580 CommentsCursors.push_back(std::make_pair(C, &F));
2585 if (Stream.SkipBlock()) {
2586 Error("malformed block record in AST file");
2593 case llvm::BitstreamEntry::Record:
2594 // The interesting case.
2598 // Read and process a record.
2601 switch ((ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2602 default: // Default behavior: ignore.
2606 if (F.LocalNumTypes != 0) {
2607 Error("duplicate TYPE_OFFSET record in AST file");
2610 F.TypeOffsets = (const uint32_t *)Blob.data();
2611 F.LocalNumTypes = Record[0];
2612 unsigned LocalBaseTypeIndex = Record[1];
2613 F.BaseTypeIndex = getTotalNumTypes();
2615 if (F.LocalNumTypes > 0) {
2616 // Introduce the global -> local mapping for types within this module.
2617 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
2619 // Introduce the local -> global mapping for types within this module.
2620 F.TypeRemap.insertOrReplace(
2621 std::make_pair(LocalBaseTypeIndex,
2622 F.BaseTypeIndex - LocalBaseTypeIndex));
2624 // Increase size by >= 1 so we get a unique base index in the next module.
2625 TypesLoaded.resize(TypesLoaded.size() + std::max(F.LocalNumTypes, 1U));
2630 if (F.LocalNumDecls != 0) {
2631 Error("duplicate DECL_OFFSET record in AST file");
2634 F.DeclOffsets = (const DeclOffset *)Blob.data();
2635 F.LocalNumDecls = Record[0];
2636 unsigned LocalBaseDeclID = Record[1];
2637 F.BaseDeclID = getTotalNumDecls();
2639 if (F.LocalNumDecls > 0) {
2640 // Introduce the global -> local mapping for declarations within this
2642 GlobalDeclMap.insert(
2643 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));
2645 // Introduce the local -> global mapping for declarations within this
2647 F.DeclRemap.insertOrReplace(
2648 std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));
2650 // Introduce the global -> local mapping for declarations within this
2652 F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
2655 // Increase size by >= 1 so we get a unique base index in the next module.
2656 DeclsLoaded.resize(DeclsLoaded.size() + std::max(F.LocalNumDecls, 1U));
2660 case TU_UPDATE_LEXICAL: {
2661 DeclContext *TU = Context.getTranslationUnitDecl();
2662 DeclContextInfo &Info = F.DeclContextInfos[TU];
2663 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair *>(Blob.data());
2664 Info.NumLexicalDecls
2665 = static_cast<unsigned int>(Blob.size() / sizeof(KindDeclIDPair));
2666 TU->setHasExternalLexicalStorage(true);
2670 case UPDATE_VISIBLE: {
2672 serialization::DeclID ID = ReadDeclID(F, Record, Idx);
2673 ASTDeclContextNameLookupTable *Table =
2674 ASTDeclContextNameLookupTable::Create(
2675 (const unsigned char *)Blob.data() + Record[Idx++],
2676 (const unsigned char *)Blob.data() + sizeof(uint32_t),
2677 (const unsigned char *)Blob.data(),
2678 ASTDeclContextNameLookupTrait(*this, F));
2679 if (Decl *D = GetExistingDecl(ID)) {
2680 auto *DC = cast<DeclContext>(D);
2681 DC->getPrimaryContext()->setHasExternalVisibleStorage(true);
2682 auto *&LookupTable = F.DeclContextInfos[DC].NameLookupTableData;
2684 LookupTable = Table;
2686 PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F));
2690 case IDENTIFIER_TABLE:
2691 F.IdentifierTableData = Blob.data();
2693 F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
2694 (const unsigned char *)F.IdentifierTableData + Record[0],
2695 (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
2696 (const unsigned char *)F.IdentifierTableData,
2697 ASTIdentifierLookupTrait(*this, F));
2699 PP.getIdentifierTable().setExternalIdentifierLookup(this);
2703 case IDENTIFIER_OFFSET: {
2704 if (F.LocalNumIdentifiers != 0) {
2705 Error("duplicate IDENTIFIER_OFFSET record in AST file");
2708 F.IdentifierOffsets = (const uint32_t *)Blob.data();
2709 F.LocalNumIdentifiers = Record[0];
2710 unsigned LocalBaseIdentifierID = Record[1];
2711 F.BaseIdentifierID = getTotalNumIdentifiers();
2713 if (F.LocalNumIdentifiers > 0) {
2714 // Introduce the global -> local mapping for identifiers within this
2716 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
2719 // Introduce the local -> global mapping for identifiers within this
2721 F.IdentifierRemap.insertOrReplace(
2722 std::make_pair(LocalBaseIdentifierID,
2723 F.BaseIdentifierID - LocalBaseIdentifierID));
2726 // Increase size by >= 1 so we get a unique base index in the next module.
2727 IdentifiersLoaded.resize(IdentifiersLoaded.size() +
2728 std::max(F.LocalNumIdentifiers, 1U));
2732 case EAGERLY_DESERIALIZED_DECLS:
2733 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2734 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2738 if (SpecialTypes.empty()) {
2739 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2740 SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
2744 if (SpecialTypes.size() != Record.size()) {
2745 Error("invalid special-types record");
2749 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
2750 serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
2751 if (!SpecialTypes[I])
2752 SpecialTypes[I] = ID;
2753 // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
2759 TotalNumStatements += Record[0];
2760 TotalNumMacros += Record[1];
2761 TotalLexicalDeclContexts += Record[2];
2762 TotalVisibleDeclContexts += Record[3];
2765 case UNUSED_FILESCOPED_DECLS:
2766 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2767 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
2770 case DELEGATING_CTORS:
2771 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2772 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
2775 case WEAK_UNDECLARED_IDENTIFIERS:
2776 if (Record.size() % 4 != 0) {
2777 Error("invalid weak identifiers record");
2781 // FIXME: Ignore weak undeclared identifiers from non-original PCH
2782 // files. This isn't the way to do it :)
2783 WeakUndeclaredIdentifiers.clear();
2785 // Translate the weak, undeclared identifiers into global IDs.
2786 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
2787 WeakUndeclaredIdentifiers.push_back(
2788 getGlobalIdentifierID(F, Record[I++]));
2789 WeakUndeclaredIdentifiers.push_back(
2790 getGlobalIdentifierID(F, Record[I++]));
2791 WeakUndeclaredIdentifiers.push_back(
2792 ReadSourceLocation(F, Record, I).getRawEncoding());
2793 WeakUndeclaredIdentifiers.push_back(Record[I++]);
2797 case LOCALLY_SCOPED_EXTERN_C_DECLS:
2798 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2799 LocallyScopedExternCDecls.push_back(getGlobalDeclID(F, Record[I]));
2802 case SELECTOR_OFFSETS: {
2803 F.SelectorOffsets = (const uint32_t *)Blob.data();
2804 F.LocalNumSelectors = Record[0];
2805 unsigned LocalBaseSelectorID = Record[1];
2806 F.BaseSelectorID = getTotalNumSelectors();
2808 if (F.LocalNumSelectors > 0) {
2809 // Introduce the global -> local mapping for selectors within this
2811 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));
2813 // Introduce the local -> global mapping for selectors within this
2815 F.SelectorRemap.insertOrReplace(
2816 std::make_pair(LocalBaseSelectorID,
2817 F.BaseSelectorID - LocalBaseSelectorID));
2819 // Increase size by >= 1 so we get a unique base index in the next module.
2820 SelectorsLoaded.resize(SelectorsLoaded.size() +
2821 std::max(F.LocalNumSelectors, 1U));
2826 F.SelectorLookupTableData = (const unsigned char *)Blob.data();
2828 F.SelectorLookupTable
2829 = ASTSelectorLookupTable::Create(
2830 F.SelectorLookupTableData + Record[0],
2831 F.SelectorLookupTableData,
2832 ASTSelectorLookupTrait(*this, F));
2833 TotalNumMethodPoolEntries += Record[1];
2836 case REFERENCED_SELECTOR_POOL:
2837 if (!Record.empty()) {
2838 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
2839 ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
2841 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
2847 case PP_COUNTER_VALUE:
2848 if (!Record.empty() && Listener)
2849 Listener->ReadCounter(F, Record[0]);
2852 case FILE_SORTED_DECLS:
2853 F.FileSortedDecls = (const DeclID *)Blob.data();
2854 F.NumFileSortedDecls = Record[0];
2857 case SOURCE_LOCATION_OFFSETS: {
2858 F.SLocEntryOffsets = (const uint32_t *)Blob.data();
2859 F.LocalNumSLocEntries = Record[0];
2860 unsigned SLocSpaceSize = Record[1];
2862 // Increase size by >= 1 so we get a unique base index in the next module.
2863 std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
2864 SourceMgr.AllocateLoadedSLocEntries(std::max(F.LocalNumSLocEntries, 1U),
2866 // Make our entry in the range map. BaseID is negative and growing, so
2867 // we invert it. Because we invert it, though, we need the other end of
2869 unsigned RangeStart =
2870 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
2871 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
2872 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);
2874 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
2875 assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0);
2876 GlobalSLocOffsetMap.insert(
2877 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
2878 - SLocSpaceSize,&F));
2880 // Initialize the remapping table.
2881 // Invalid stays invalid.
2882 F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
2883 // This module. Base was 2 when being compiled.
2884 F.SLocRemap.insertOrReplace(std::make_pair(2U,
2885 static_cast<int>(F.SLocEntryBaseOffset - 2)));
2887 TotalNumSLocEntries += F.LocalNumSLocEntries;
2891 case MODULE_OFFSET_MAP: {
2892 // Additional remapping information.
2893 const unsigned char *Data = (const unsigned char*)Blob.data();
2894 const unsigned char *DataEnd = Data + Blob.size();
2896 // If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
2897 if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
2898 F.SLocRemap.insert(std::make_pair(0U, 0));
2899 F.SLocRemap.insert(std::make_pair(2U, 1));
2902 // Continuous range maps we may be updating in our module.
2903 ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap);
2904 ContinuousRangeMap<uint32_t, int, 2>::Builder
2905 IdentifierRemap(F.IdentifierRemap);
2906 ContinuousRangeMap<uint32_t, int, 2>::Builder
2907 MacroRemap(F.MacroRemap);
2908 ContinuousRangeMap<uint32_t, int, 2>::Builder
2909 PreprocessedEntityRemap(F.PreprocessedEntityRemap);
2910 ContinuousRangeMap<uint32_t, int, 2>::Builder
2911 SubmoduleRemap(F.SubmoduleRemap);
2912 ContinuousRangeMap<uint32_t, int, 2>::Builder
2913 SelectorRemap(F.SelectorRemap);
2914 ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap);
2915 ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap);
2917 while(Data < DataEnd) {
2918 using namespace llvm::support;
2919 uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
2920 StringRef Name = StringRef((const char*)Data, Len);
2922 ModuleFile *OM = ModuleMgr.lookup(Name);
2924 Error("SourceLocation remap refers to unknown module");
2928 uint32_t SLocOffset =
2929 endian::readNext<uint32_t, little, unaligned>(Data);
2930 uint32_t IdentifierIDOffset =
2931 endian::readNext<uint32_t, little, unaligned>(Data);
2932 uint32_t MacroIDOffset =
2933 endian::readNext<uint32_t, little, unaligned>(Data);
2934 uint32_t PreprocessedEntityIDOffset =
2935 endian::readNext<uint32_t, little, unaligned>(Data);
2936 uint32_t SubmoduleIDOffset =
2937 endian::readNext<uint32_t, little, unaligned>(Data);
2938 uint32_t SelectorIDOffset =
2939 endian::readNext<uint32_t, little, unaligned>(Data);
2940 uint32_t DeclIDOffset =
2941 endian::readNext<uint32_t, little, unaligned>(Data);
2942 uint32_t TypeIndexOffset =
2943 endian::readNext<uint32_t, little, unaligned>(Data);
2945 // Source location offset is mapped to OM->SLocEntryBaseOffset.
2946 SLocRemap.insert(std::make_pair(SLocOffset,
2947 static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset)));
2948 IdentifierRemap.insert(
2949 std::make_pair(IdentifierIDOffset,
2950 OM->BaseIdentifierID - IdentifierIDOffset));
2951 MacroRemap.insert(std::make_pair(MacroIDOffset,
2952 OM->BaseMacroID - MacroIDOffset));
2953 PreprocessedEntityRemap.insert(
2954 std::make_pair(PreprocessedEntityIDOffset,
2955 OM->BasePreprocessedEntityID - PreprocessedEntityIDOffset));
2956 SubmoduleRemap.insert(std::make_pair(SubmoduleIDOffset,
2957 OM->BaseSubmoduleID - SubmoduleIDOffset));
2958 SelectorRemap.insert(std::make_pair(SelectorIDOffset,
2959 OM->BaseSelectorID - SelectorIDOffset));
2960 DeclRemap.insert(std::make_pair(DeclIDOffset,
2961 OM->BaseDeclID - DeclIDOffset));
2963 TypeRemap.insert(std::make_pair(TypeIndexOffset,
2964 OM->BaseTypeIndex - TypeIndexOffset));
2966 // Global -> local mappings.
2967 F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
2972 case SOURCE_MANAGER_LINE_TABLE:
2973 if (ParseLineTable(F, Record))
2977 case SOURCE_LOCATION_PRELOADS: {
2978 // Need to transform from the local view (1-based IDs) to the global view,
2979 // which is based off F.SLocEntryBaseID.
2980 if (!F.PreloadSLocEntries.empty()) {
2981 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
2985 F.PreloadSLocEntries.swap(Record);
2989 case EXT_VECTOR_DECLS:
2990 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2991 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
2995 if (Record.size() % 3 != 0) {
2996 Error("Invalid VTABLE_USES record");
3000 // Later tables overwrite earlier ones.
3001 // FIXME: Modules will have some trouble with this. This is clearly not
3002 // the right way to do this.
3005 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3006 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
3007 VTableUses.push_back(
3008 ReadSourceLocation(F, Record, Idx).getRawEncoding());
3009 VTableUses.push_back(Record[Idx++]);
3013 case DYNAMIC_CLASSES:
3014 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3015 DynamicClasses.push_back(getGlobalDeclID(F, Record[I]));
3018 case PENDING_IMPLICIT_INSTANTIATIONS:
3019 if (PendingInstantiations.size() % 2 != 0) {
3020 Error("Invalid existing PendingInstantiations");
3024 if (Record.size() % 2 != 0) {
3025 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3029 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3030 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
3031 PendingInstantiations.push_back(
3032 ReadSourceLocation(F, Record, I).getRawEncoding());
3036 case SEMA_DECL_REFS:
3037 if (Record.size() != 2) {
3038 Error("Invalid SEMA_DECL_REFS block");
3041 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3042 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3045 case PPD_ENTITIES_OFFSETS: {
3046 F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3047 assert(Blob.size() % sizeof(PPEntityOffset) == 0);
3048 F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3050 unsigned LocalBasePreprocessedEntityID = Record[0];
3052 unsigned StartingID;
3053 if (!PP.getPreprocessingRecord())
3054 PP.createPreprocessingRecord();
3055 if (!PP.getPreprocessingRecord()->getExternalSource())
3056 PP.getPreprocessingRecord()->SetExternalSource(*this);
3058 // Increase size by >= 1 so we get a unique base index in the next module.
3060 = PP.getPreprocessingRecord()
3061 ->allocateLoadedEntities(std::max(F.NumPreprocessedEntities, 1U));
3062 F.BasePreprocessedEntityID = StartingID;
3064 if (F.NumPreprocessedEntities > 0) {
3065 // Introduce the global -> local mapping for preprocessed entities in
3067 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));
3069 // Introduce the local -> global mapping for preprocessed entities in
3071 F.PreprocessedEntityRemap.insertOrReplace(
3072 std::make_pair(LocalBasePreprocessedEntityID,
3073 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3079 case DECL_UPDATE_OFFSETS: {
3080 if (Record.size() % 2 != 0) {
3081 Error("invalid DECL_UPDATE_OFFSETS block in AST file");
3084 for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3085 GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
3086 DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));
3088 // If we've already loaded the decl, perform the updates when we finish
3089 // loading this block.
3090 if (Decl *D = GetExistingDecl(ID))
3091 PendingUpdateRecords.push_back(std::make_pair(ID, D));
3096 case DECL_REPLACEMENTS: {
3097 if (Record.size() % 3 != 0) {
3098 Error("invalid DECL_REPLACEMENTS block in AST file");
3101 for (unsigned I = 0, N = Record.size(); I != N; I += 3)
3102 ReplacedDecls[getGlobalDeclID(F, Record[I])]
3103 = ReplacedDeclInfo(&F, Record[I+1], Record[I+2]);
3107 case OBJC_CATEGORIES_MAP: {
3108 if (F.LocalNumObjCCategoriesInMap != 0) {
3109 Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
3113 F.LocalNumObjCCategoriesInMap = Record[0];
3114 F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3118 case OBJC_CATEGORIES:
3119 F.ObjCCategories.swap(Record);
3122 case CXX_BASE_SPECIFIER_OFFSETS: {
3123 if (F.LocalNumCXXBaseSpecifiers != 0) {
3124 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file");
3128 F.LocalNumCXXBaseSpecifiers = Record[0];
3129 F.CXXBaseSpecifiersOffsets = (const uint32_t *)Blob.data();
3130 NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers;
3134 case DIAG_PRAGMA_MAPPINGS:
3135 if (F.PragmaDiagMappings.empty())
3136 F.PragmaDiagMappings.swap(Record);
3138 F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(),
3139 Record.begin(), Record.end());
3142 case CUDA_SPECIAL_DECL_REFS:
3143 // Later tables overwrite earlier ones.
3144 // FIXME: Modules will have trouble with this.
3145 CUDASpecialDeclRefs.clear();
3146 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3147 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3150 case HEADER_SEARCH_TABLE: {
3151 F.HeaderFileInfoTableData = Blob.data();
3152 F.LocalNumHeaderFileInfos = Record[1];
3154 F.HeaderFileInfoTable
3155 = HeaderFileInfoLookupTable::Create(
3156 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3157 (const unsigned char *)F.HeaderFileInfoTableData,
3158 HeaderFileInfoTrait(*this, F,
3159 &PP.getHeaderSearchInfo(),
3160 Blob.data() + Record[2]));
3162 PP.getHeaderSearchInfo().SetExternalSource(this);
3163 if (!PP.getHeaderSearchInfo().getExternalLookup())
3164 PP.getHeaderSearchInfo().SetExternalLookup(this);
3169 case FP_PRAGMA_OPTIONS:
3170 // Later tables overwrite earlier ones.
3171 FPPragmaOptions.swap(Record);
3174 case OPENCL_EXTENSIONS:
3175 // Later tables overwrite earlier ones.
3176 OpenCLExtensions.swap(Record);
3179 case TENTATIVE_DEFINITIONS:
3180 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3181 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
3184 case KNOWN_NAMESPACES:
3185 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3186 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
3189 case UNDEFINED_BUT_USED:
3190 if (UndefinedButUsed.size() % 2 != 0) {
3191 Error("Invalid existing UndefinedButUsed");
3195 if (Record.size() % 2 != 0) {
3196 Error("invalid undefined-but-used record");
3199 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3200 UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
3201 UndefinedButUsed.push_back(
3202 ReadSourceLocation(F, Record, I).getRawEncoding());
3206 case IMPORTED_MODULES: {
3207 if (F.Kind != MK_Module) {
3208 // If we aren't loading a module (which has its own exports), make
3209 // all of the imported modules visible.
3210 // FIXME: Deal with macros-only imports.
3211 for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3212 unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
3213 SourceLocation Loc = ReadSourceLocation(F, Record, I);
3215 ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
3221 case LOCAL_REDECLARATIONS: {
3222 F.RedeclarationChains.swap(Record);
3226 case LOCAL_REDECLARATIONS_MAP: {
3227 if (F.LocalNumRedeclarationsInMap != 0) {
3228 Error("duplicate LOCAL_REDECLARATIONS_MAP record in AST file");
3232 F.LocalNumRedeclarationsInMap = Record[0];
3233 F.RedeclarationsMap = (const LocalRedeclarationsInfo *)Blob.data();
3237 case MERGED_DECLARATIONS: {
3238 for (unsigned Idx = 0; Idx < Record.size(); /* increment in loop */) {
3239 GlobalDeclID CanonID = getGlobalDeclID(F, Record[Idx++]);
3240 SmallVectorImpl<GlobalDeclID> &Decls = StoredMergedDecls[CanonID];
3241 for (unsigned N = Record[Idx++]; N > 0; --N)
3242 Decls.push_back(getGlobalDeclID(F, Record[Idx++]));
3247 case MACRO_OFFSET: {
3248 if (F.LocalNumMacros != 0) {
3249 Error("duplicate MACRO_OFFSET record in AST file");
3252 F.MacroOffsets = (const uint32_t *)Blob.data();
3253 F.LocalNumMacros = Record[0];
3254 unsigned LocalBaseMacroID = Record[1];
3255 F.BaseMacroID = getTotalNumMacros();
3257 if (F.LocalNumMacros > 0) {
3258 // Introduce the global -> local mapping for macros within this module.
3259 GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));
3261 // Introduce the local -> global mapping for macros within this module.
3262 F.MacroRemap.insertOrReplace(
3263 std::make_pair(LocalBaseMacroID,
3264 F.BaseMacroID - LocalBaseMacroID));
3266 // Increase size by >= 1 so we get a unique base index in the next module.
3267 MacrosLoaded.resize(MacrosLoaded.size() + std::max(F.LocalNumMacros, 1U));
3272 // FIXME: Not used yet.
3276 case LATE_PARSED_TEMPLATE: {
3277 LateParsedTemplates.append(Record.begin(), Record.end());
3281 case OPTIMIZE_PRAGMA_OPTIONS:
3282 if (Record.size() != 1) {
3283 Error("invalid pragma optimize record");
3286 OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
3292 ASTReader::ASTReadResult
3293 ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
3294 const ModuleFile *ImportedBy,
3295 unsigned ClientLoadCapabilities) {
3297 F.ModuleMapPath = ReadString(Record, Idx);
3299 // Try to resolve ModuleName in the current header search context and
3300 // verify that it is found in the same module map file as we saved. If the
3301 // top-level AST file is a main file, skip this check because there is no
3302 // usable header search context.
3303 assert(!F.ModuleName.empty() &&
3304 "MODULE_NAME should come before MOUDLE_MAP_FILE");
3305 if (F.Kind == MK_Module && (*ModuleMgr.begin())->Kind != MK_MainFile) {
3306 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
3308 assert(ImportedBy && "top-level import should be verified");
3309 if ((ClientLoadCapabilities & ARR_Missing) == 0)
3310 Diag(diag::err_imported_module_not_found)
3311 << F.ModuleName << ImportedBy->FileName;
3315 // Check the primary module map file.
3316 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
3317 const FileEntry *StoredModMap = FileMgr.getFile(F.ModuleMapPath);
3318 const FileEntry *ModMap = Map.getModuleMapFileForUniquing(M);
3319 if (StoredModMap == nullptr || StoredModMap != ModMap) {
3320 assert(ModMap && "found module is missing module map file");
3321 assert(M->Name == F.ModuleName && "found module with different name");
3322 assert(ImportedBy && "top-level import should be verified");
3323 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3324 Diag(diag::err_imported_module_modmap_changed)
3325 << F.ModuleName << ImportedBy->FileName
3326 << ModMap->getName() << F.ModuleMapPath;
3330 llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
3331 for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
3332 // FIXME: we should use input files rather than storing names.
3333 std::string Filename = ReadString(Record, Idx);
3334 const FileEntry *F =
3335 FileMgr.getFile(Filename, false, false);
3337 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3338 Error("could not find file '" + Filename +"' referenced by AST file");
3341 AdditionalStoredMaps.insert(F);
3344 // Check any additional module map files (e.g. module.private.modulemap)
3345 // that are not in the pcm.
3346 if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
3347 for (const FileEntry *ModMap : *AdditionalModuleMaps) {
3348 // Remove files that match
3349 // Note: SmallPtrSet::erase is really remove
3350 if (!AdditionalStoredMaps.erase(ModMap)) {
3351 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3352 Diag(diag::err_module_different_modmap)
3353 << F.ModuleName << /*new*/0 << ModMap->getName();
3359 // Check any additional module map files that are in the pcm, but not
3360 // found in header search. Cases that match are already removed.
3361 for (const FileEntry *ModMap : AdditionalStoredMaps) {
3362 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3363 Diag(diag::err_module_different_modmap)
3364 << F.ModuleName << /*not new*/1 << ModMap->getName();
3370 Listener->ReadModuleMapFile(F.ModuleMapPath);
3375 /// \brief Move the given method to the back of the global list of methods.
3376 static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
3377 // Find the entry for this selector in the method pool.
3378 Sema::GlobalMethodPool::iterator Known
3379 = S.MethodPool.find(Method->getSelector());
3380 if (Known == S.MethodPool.end())
3383 // Retrieve the appropriate method list.
3384 ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
3385 : Known->second.second;
3387 for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
3389 if (List->Method == Method) {
3397 if (List->getNext())
3398 List->Method = List->getNext()->Method;
3400 List->Method = Method;
3404 void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner,
3405 bool FromFinalization) {
3406 // FIXME: Only do this if Owner->NameVisibility == AllVisible.
3407 for (Decl *D : Names.HiddenDecls) {
3408 bool wasHidden = D->Hidden;
3411 if (wasHidden && SemaObj) {
3412 if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
3413 moveMethodToBackOfGlobalList(*SemaObj, Method);
3418 assert((FromFinalization || Owner->NameVisibility >= Module::MacrosVisible) &&
3419 "nothing to make visible?");
3420 for (const auto &Macro : Names.HiddenMacros) {
3421 if (FromFinalization)
3422 PP.appendMacroDirective(Macro.first,
3423 Macro.second->import(PP, SourceLocation()));
3425 installImportedMacro(Macro.first, Macro.second, Owner);
3429 void ASTReader::makeModuleVisible(Module *Mod,
3430 Module::NameVisibilityKind NameVisibility,
3431 SourceLocation ImportLoc,
3433 llvm::SmallPtrSet<Module *, 4> Visited;
3434 SmallVector<Module *, 4> Stack;
3435 Stack.push_back(Mod);
3436 while (!Stack.empty()) {
3437 Mod = Stack.pop_back_val();
3439 if (NameVisibility <= Mod->NameVisibility) {
3440 // This module already has this level of visibility (or greater), so
3441 // there is nothing more to do.
3445 if (!Mod->isAvailable()) {
3446 // Modules that aren't available cannot be made visible.
3450 // Update the module's name visibility.
3451 if (NameVisibility >= Module::MacrosVisible &&
3452 Mod->NameVisibility < Module::MacrosVisible)
3453 Mod->MacroVisibilityLoc = ImportLoc;
3454 Mod->NameVisibility = NameVisibility;
3456 // If we've already deserialized any names from this module,
3457 // mark them as visible.
3458 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
3459 if (Hidden != HiddenNamesMap.end()) {
3460 auto HiddenNames = std::move(*Hidden);
3461 HiddenNamesMap.erase(Hidden);
3462 makeNamesVisible(HiddenNames.second, HiddenNames.first,
3463 /*FromFinalization*/false);
3464 assert(HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
3465 "making names visible added hidden names");
3468 // Push any exported modules onto the stack to be marked as visible.
3469 SmallVector<Module *, 16> Exports;
3470 Mod->getExportedModules(Exports);
3471 for (SmallVectorImpl<Module *>::iterator
3472 I = Exports.begin(), E = Exports.end(); I != E; ++I) {
3473 Module *Exported = *I;
3474 if (Visited.insert(Exported))
3475 Stack.push_back(Exported);
3478 // Detect any conflicts.
3480 assert(ImportLoc.isValid() && "Missing import location");
3481 for (unsigned I = 0, N = Mod->Conflicts.size(); I != N; ++I) {
3482 if (Mod->Conflicts[I].Other->NameVisibility >= NameVisibility) {
3483 Diag(ImportLoc, diag::warn_module_conflict)
3484 << Mod->getFullModuleName()
3485 << Mod->Conflicts[I].Other->getFullModuleName()
3486 << Mod->Conflicts[I].Message;
3487 // FIXME: Need note where the other module was imported.
3494 bool ASTReader::loadGlobalIndex() {
3498 if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
3499 !Context.getLangOpts().Modules)
3502 // Try to load the global index.
3503 TriedLoadingGlobalIndex = true;
3504 StringRef ModuleCachePath
3505 = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
3506 std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result
3507 = GlobalModuleIndex::readIndex(ModuleCachePath);
3511 GlobalIndex.reset(Result.first);
3512 ModuleMgr.setGlobalIndex(GlobalIndex.get());
3516 bool ASTReader::isGlobalIndexUnavailable() const {
3517 return Context.getLangOpts().Modules && UseGlobalIndex &&
3518 !hasGlobalIndex() && TriedLoadingGlobalIndex;
3521 static void updateModuleTimestamp(ModuleFile &MF) {
3522 // Overwrite the timestamp file contents so that file's mtime changes.
3523 std::string TimestampFilename = MF.getTimestampFilename();
3524 std::string ErrorInfo;
3525 llvm::raw_fd_ostream OS(TimestampFilename.c_str(), ErrorInfo,
3526 llvm::sys::fs::F_Text);
3527 if (!ErrorInfo.empty())
3529 OS << "Timestamp file\n";
3532 ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName,
3534 SourceLocation ImportLoc,
3535 unsigned ClientLoadCapabilities) {
3536 llvm::SaveAndRestore<SourceLocation>
3537 SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
3539 // Defer any pending actions until we get to the end of reading the AST file.
3540 Deserializing AnASTFile(this);
3542 // Bump the generation number.
3543 unsigned PreviousGeneration = incrementGeneration(Context);
3545 unsigned NumModules = ModuleMgr.size();
3546 SmallVector<ImportedModule, 4> Loaded;
3547 switch(ASTReadResult ReadResult = ReadASTCore(FileName, Type, ImportLoc,
3548 /*ImportedBy=*/nullptr, Loaded,
3550 ClientLoadCapabilities)) {
3554 case VersionMismatch:
3555 case ConfigurationMismatch:
3557 llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
3558 for (const ImportedModule &IM : Loaded)
3559 LoadedSet.insert(IM.Mod);
3561 ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, ModuleMgr.end(),
3563 Context.getLangOpts().Modules
3564 ? &PP.getHeaderSearchInfo().getModuleMap()
3567 // If we find that any modules are unusable, the global index is going
3568 // to be out-of-date. Just remove it.
3569 GlobalIndex.reset();
3570 ModuleMgr.setGlobalIndex(nullptr);
3577 // Here comes stuff that we only do once the entire chain is loaded.
3579 // Load the AST blocks of all of the modules that we loaded.
3580 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3581 MEnd = Loaded.end();
3583 ModuleFile &F = *M->Mod;
3585 // Read the AST block.
3586 if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
3589 // Once read, set the ModuleFile bit base offset and update the size in
3590 // bits of all files we've seen.
3591 F.GlobalBitOffset = TotalModulesSizeInBits;
3592 TotalModulesSizeInBits += F.SizeInBits;
3593 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));
3595 // Preload SLocEntries.
3596 for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
3597 int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
3598 // Load it through the SourceManager and don't call ReadSLocEntry()
3599 // directly because the entry may have already been loaded in which case
3600 // calling ReadSLocEntry() directly would trigger an assertion in
3602 SourceMgr.getLoadedSLocEntryByID(Index);
3606 // Setup the import locations and notify the module manager that we've
3607 // committed to these module files.
3608 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3609 MEnd = Loaded.end();
3611 ModuleFile &F = *M->Mod;
3613 ModuleMgr.moduleFileAccepted(&F);
3615 // Set the import location.
3616 F.DirectImportLoc = ImportLoc;
3618 F.ImportLoc = M->ImportLoc;
3620 F.ImportLoc = ReadSourceLocation(*M->ImportedBy,
3621 M->ImportLoc.getRawEncoding());
3624 // Mark all of the identifiers in the identifier table as being out of date,
3625 // so that various accessors know to check the loaded modules when the
3626 // identifier is used.
3627 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
3628 IdEnd = PP.getIdentifierTable().end();
3630 Id->second->setOutOfDate(true);
3632 // Resolve any unresolved module exports.
3633 for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
3634 UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
3635 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
3636 Module *ResolvedMod = getSubmodule(GlobalID);
3638 switch (Unresolved.Kind) {
3639 case UnresolvedModuleRef::Conflict:
3641 Module::Conflict Conflict;
3642 Conflict.Other = ResolvedMod;
3643 Conflict.Message = Unresolved.String.str();
3644 Unresolved.Mod->Conflicts.push_back(Conflict);
3648 case UnresolvedModuleRef::Import:
3650 Unresolved.Mod->Imports.push_back(ResolvedMod);
3653 case UnresolvedModuleRef::Export:
3654 if (ResolvedMod || Unresolved.IsWildcard)
3655 Unresolved.Mod->Exports.push_back(
3656 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
3660 UnresolvedModuleRefs.clear();
3662 // FIXME: How do we load the 'use'd modules? They may not be submodules.
3663 // Might be unnecessary as use declarations are only used to build the
3666 InitializeContext();
3671 if (DeserializationListener)
3672 DeserializationListener->ReaderInitialized(this);
3674 ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
3675 if (!PrimaryModule.OriginalSourceFileID.isInvalid()) {
3676 PrimaryModule.OriginalSourceFileID
3677 = FileID::get(PrimaryModule.SLocEntryBaseID
3678 + PrimaryModule.OriginalSourceFileID.getOpaqueValue() - 1);
3680 // If this AST file is a precompiled preamble, then set the
3681 // preamble file ID of the source manager to the file source file
3682 // from which the preamble was built.
3683 if (Type == MK_Preamble) {
3684 SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
3685 } else if (Type == MK_MainFile) {
3686 SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
3690 // For any Objective-C class definitions we have already loaded, make sure
3691 // that we load any additional categories.
3692 for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
3693 loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
3694 ObjCClassesLoaded[I],
3695 PreviousGeneration);
3698 if (PP.getHeaderSearchInfo()
3699 .getHeaderSearchOpts()
3700 .ModulesValidateOncePerBuildSession) {
3701 // Now we are certain that the module and all modules it depends on are
3702 // up to date. Create or update timestamp files for modules that are
3703 // located in the module cache (not for PCH files that could be anywhere
3704 // in the filesystem).
3705 for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
3706 ImportedModule &M = Loaded[I];
3707 if (M.Mod->Kind == MK_Module) {
3708 updateModuleTimestamp(*M.Mod);
3716 ASTReader::ASTReadResult
3717 ASTReader::ReadASTCore(StringRef FileName,
3719 SourceLocation ImportLoc,
3720 ModuleFile *ImportedBy,
3721 SmallVectorImpl<ImportedModule> &Loaded,
3722 off_t ExpectedSize, time_t ExpectedModTime,
3723 unsigned ClientLoadCapabilities) {
3725 std::string ErrorStr;
3726 ModuleManager::AddModuleResult AddResult
3727 = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
3728 getGeneration(), ExpectedSize, ExpectedModTime,
3731 switch (AddResult) {
3732 case ModuleManager::AlreadyLoaded:
3735 case ModuleManager::NewlyLoaded:
3736 // Load module file below.
3739 case ModuleManager::Missing:
3740 // The module file was missing; if the client handle handle, that, return
3742 if (ClientLoadCapabilities & ARR_Missing)
3745 // Otherwise, return an error.
3747 std::string Msg = "Unable to load module \"" + FileName.str() + "\": "
3753 case ModuleManager::OutOfDate:
3754 // We couldn't load the module file because it is out-of-date. If the
3755 // client can handle out-of-date, return it.
3756 if (ClientLoadCapabilities & ARR_OutOfDate)
3759 // Otherwise, return an error.
3761 std::string Msg = "Unable to load module \"" + FileName.str() + "\": "
3768 assert(M && "Missing module file");
3770 // FIXME: This seems rather a hack. Should CurrentDir be part of the
3772 if (FileName != "-") {
3773 CurrentDir = llvm::sys::path::parent_path(FileName);
3774 if (CurrentDir.empty()) CurrentDir = ".";
3778 BitstreamCursor &Stream = F.Stream;
3779 Stream.init(F.StreamFile);
3780 F.SizeInBits = F.Buffer->getBufferSize() * 8;
3782 // Sniff for the signature.
3783 if (Stream.Read(8) != 'C' ||
3784 Stream.Read(8) != 'P' ||
3785 Stream.Read(8) != 'C' ||
3786 Stream.Read(8) != 'H') {
3787 Diag(diag::err_not_a_pch_file) << FileName;
3791 // This is used for compatibility with older PCH formats.
3792 bool HaveReadControlBlock = false;
3795 llvm::BitstreamEntry Entry = Stream.advance();
3797 switch (Entry.Kind) {
3798 case llvm::BitstreamEntry::Error:
3799 case llvm::BitstreamEntry::EndBlock:
3800 case llvm::BitstreamEntry::Record:
3801 Error("invalid record at top-level of AST file");
3804 case llvm::BitstreamEntry::SubBlock:
3808 // We only know the control subblock ID.
3810 case llvm::bitc::BLOCKINFO_BLOCK_ID:
3811 if (Stream.ReadBlockInfoBlock()) {
3812 Error("malformed BlockInfoBlock in AST file");
3816 case CONTROL_BLOCK_ID:
3817 HaveReadControlBlock = true;
3818 switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
3822 case Failure: return Failure;
3823 case Missing: return Missing;
3824 case OutOfDate: return OutOfDate;
3825 case VersionMismatch: return VersionMismatch;
3826 case ConfigurationMismatch: return ConfigurationMismatch;
3827 case HadErrors: return HadErrors;
3831 if (!HaveReadControlBlock) {
3832 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
3833 Diag(diag::err_pch_version_too_old);
3834 return VersionMismatch;
3837 // Record that we've loaded this module.
3838 Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
3842 if (Stream.SkipBlock()) {
3843 Error("malformed block record in AST file");
3853 void ASTReader::InitializeContext() {
3854 // If there's a listener, notify them that we "read" the translation unit.
3855 if (DeserializationListener)
3856 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
3857 Context.getTranslationUnitDecl());
3859 // FIXME: Find a better way to deal with collisions between these
3860 // built-in types. Right now, we just ignore the problem.
3862 // Load the special types.
3863 if (SpecialTypes.size() >= NumSpecialTypeIDs) {
3864 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
3865 if (!Context.CFConstantStringTypeDecl)
3866 Context.setCFConstantStringType(GetType(String));
3869 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
3870 QualType FileType = GetType(File);
3871 if (FileType.isNull()) {
3872 Error("FILE type is NULL");
3876 if (!Context.FILEDecl) {
3877 if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
3878 Context.setFILEDecl(Typedef->getDecl());
3880 const TagType *Tag = FileType->getAs<TagType>();
3882 Error("Invalid FILE type in AST file");
3885 Context.setFILEDecl(Tag->getDecl());
3890 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
3891 QualType Jmp_bufType = GetType(Jmp_buf);
3892 if (Jmp_bufType.isNull()) {
3893 Error("jmp_buf type is NULL");
3897 if (!Context.jmp_bufDecl) {
3898 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
3899 Context.setjmp_bufDecl(Typedef->getDecl());
3901 const TagType *Tag = Jmp_bufType->getAs<TagType>();
3903 Error("Invalid jmp_buf type in AST file");
3906 Context.setjmp_bufDecl(Tag->getDecl());
3911 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
3912 QualType Sigjmp_bufType = GetType(Sigjmp_buf);
3913 if (Sigjmp_bufType.isNull()) {
3914 Error("sigjmp_buf type is NULL");
3918 if (!Context.sigjmp_bufDecl) {
3919 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
3920 Context.setsigjmp_bufDecl(Typedef->getDecl());
3922 const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
3923 assert(Tag && "Invalid sigjmp_buf type in AST file");
3924 Context.setsigjmp_bufDecl(Tag->getDecl());
3929 if (unsigned ObjCIdRedef
3930 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
3931 if (Context.ObjCIdRedefinitionType.isNull())
3932 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
3935 if (unsigned ObjCClassRedef
3936 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
3937 if (Context.ObjCClassRedefinitionType.isNull())
3938 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
3941 if (unsigned ObjCSelRedef
3942 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
3943 if (Context.ObjCSelRedefinitionType.isNull())
3944 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
3947 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
3948 QualType Ucontext_tType = GetType(Ucontext_t);
3949 if (Ucontext_tType.isNull()) {
3950 Error("ucontext_t type is NULL");
3954 if (!Context.ucontext_tDecl) {
3955 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
3956 Context.setucontext_tDecl(Typedef->getDecl());
3958 const TagType *Tag = Ucontext_tType->getAs<TagType>();
3959 assert(Tag && "Invalid ucontext_t type in AST file");
3960 Context.setucontext_tDecl(Tag->getDecl());
3966 ReadPragmaDiagnosticMappings(Context.getDiagnostics());
3968 // If there were any CUDA special declarations, deserialize them.
3969 if (!CUDASpecialDeclRefs.empty()) {
3970 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!");
3971 Context.setcudaConfigureCallDecl(
3972 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
3975 // Re-export any modules that were imported by a non-module AST file.
3976 // FIXME: This does not make macro-only imports visible again. It also doesn't
3977 // make #includes mapped to module imports visible.
3978 for (auto &Import : ImportedModules) {
3979 if (Module *Imported = getSubmodule(Import.ID))
3980 makeModuleVisible(Imported, Module::AllVisible,
3981 /*ImportLoc=*/Import.ImportLoc,
3982 /*Complain=*/false);
3984 ImportedModules.clear();
3987 void ASTReader::finalizeForWriting() {
3988 while (!HiddenNamesMap.empty()) {
3989 auto HiddenNames = std::move(*HiddenNamesMap.begin());
3990 HiddenNamesMap.erase(HiddenNamesMap.begin());
3991 makeNamesVisible(HiddenNames.second, HiddenNames.first,
3992 /*FromFinalization*/true);
3996 /// \brief Given a cursor at the start of an AST file, scan ahead and drop the
3997 /// cursor into the start of the given block ID, returning false on success and
3998 /// true on failure.
3999 static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
4001 llvm::BitstreamEntry Entry = Cursor.advance();
4002 switch (Entry.Kind) {
4003 case llvm::BitstreamEntry::Error:
4004 case llvm::BitstreamEntry::EndBlock:
4007 case llvm::BitstreamEntry::Record:
4008 // Ignore top-level records.
4009 Cursor.skipRecord(Entry.ID);
4012 case llvm::BitstreamEntry::SubBlock:
4013 if (Entry.ID == BlockID) {
4014 if (Cursor.EnterSubBlock(BlockID))
4020 if (Cursor.SkipBlock())
4026 /// \brief Retrieve the name of the original source file name
4027 /// directly from the AST file, without actually loading the AST
4029 std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName,
4030 FileManager &FileMgr,
4031 DiagnosticsEngine &Diags) {
4032 // Open the AST file.
4034 std::unique_ptr<llvm::MemoryBuffer> Buffer;
4035 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr));
4037 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ASTFileName << ErrStr;
4038 return std::string();
4041 // Initialize the stream
4042 llvm::BitstreamReader StreamFile;
4043 BitstreamCursor Stream;
4044 StreamFile.init((const unsigned char *)Buffer->getBufferStart(),
4045 (const unsigned char *)Buffer->getBufferEnd());
4046 Stream.init(StreamFile);
4048 // Sniff for the signature.
4049 if (Stream.Read(8) != 'C' ||
4050 Stream.Read(8) != 'P' ||
4051 Stream.Read(8) != 'C' ||
4052 Stream.Read(8) != 'H') {
4053 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName;
4054 return std::string();
4057 // Scan for the CONTROL_BLOCK_ID block.
4058 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
4059 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4060 return std::string();
4063 // Scan for ORIGINAL_FILE inside the control block.
4066 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4067 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4068 return std::string();
4070 if (Entry.Kind != llvm::BitstreamEntry::Record) {
4071 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4072 return std::string();
4077 if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE)
4083 class SimplePCHValidator : public ASTReaderListener {
4084 const LangOptions &ExistingLangOpts;
4085 const TargetOptions &ExistingTargetOpts;
4086 const PreprocessorOptions &ExistingPPOpts;
4087 FileManager &FileMgr;
4090 SimplePCHValidator(const LangOptions &ExistingLangOpts,
4091 const TargetOptions &ExistingTargetOpts,
4092 const PreprocessorOptions &ExistingPPOpts,
4093 FileManager &FileMgr)
4094 : ExistingLangOpts(ExistingLangOpts),
4095 ExistingTargetOpts(ExistingTargetOpts),
4096 ExistingPPOpts(ExistingPPOpts),
4101 bool ReadLanguageOptions(const LangOptions &LangOpts,
4102 bool Complain) override {
4103 return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr);
4105 bool ReadTargetOptions(const TargetOptions &TargetOpts,
4106 bool Complain) override {
4107 return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr);
4109 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
4111 std::string &SuggestedPredefines) override {
4112 return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
4113 SuggestedPredefines, ExistingLangOpts);
4118 bool ASTReader::readASTFileControlBlock(StringRef Filename,
4119 FileManager &FileMgr,
4120 ASTReaderListener &Listener) {
4121 // Open the AST file.
4123 std::unique_ptr<llvm::MemoryBuffer> Buffer;
4124 Buffer.reset(FileMgr.getBufferForFile(Filename, &ErrStr));
4129 // Initialize the stream
4130 llvm::BitstreamReader StreamFile;
4131 BitstreamCursor Stream;
4132 StreamFile.init((const unsigned char *)Buffer->getBufferStart(),
4133 (const unsigned char *)Buffer->getBufferEnd());
4134 Stream.init(StreamFile);
4136 // Sniff for the signature.
4137 if (Stream.Read(8) != 'C' ||
4138 Stream.Read(8) != 'P' ||
4139 Stream.Read(8) != 'C' ||
4140 Stream.Read(8) != 'H') {
4144 // Scan for the CONTROL_BLOCK_ID block.
4145 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
4148 bool NeedsInputFiles = Listener.needsInputFileVisitation();
4149 bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
4150 BitstreamCursor InputFilesCursor;
4151 if (NeedsInputFiles) {
4152 InputFilesCursor = Stream;
4153 if (SkipCursorToBlock(InputFilesCursor, INPUT_FILES_BLOCK_ID))
4156 // Read the abbreviations
4158 uint64_t Offset = InputFilesCursor.GetCurrentBitNo();
4159 unsigned Code = InputFilesCursor.ReadCode();
4161 // We expect all abbrevs to be at the start of the block.
4162 if (Code != llvm::bitc::DEFINE_ABBREV) {
4163 InputFilesCursor.JumpToBit(Offset);
4166 InputFilesCursor.ReadAbbrevRecord();
4170 // Scan for ORIGINAL_FILE inside the control block.
4173 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4174 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4177 if (Entry.Kind != llvm::BitstreamEntry::Record)
4182 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4183 switch ((ControlRecordTypes)RecCode) {
4185 if (Record[0] != VERSION_MAJOR)
4188 if (Listener.ReadFullVersionInformation(Blob))
4194 Listener.ReadModuleName(Blob);
4196 case MODULE_MAP_FILE: {
4198 Listener.ReadModuleMapFile(ReadString(Record, Idx));
4201 case LANGUAGE_OPTIONS:
4202 if (ParseLanguageOptions(Record, false, Listener))
4206 case TARGET_OPTIONS:
4207 if (ParseTargetOptions(Record, false, Listener))
4211 case DIAGNOSTIC_OPTIONS:
4212 if (ParseDiagnosticOptions(Record, false, Listener))
4216 case FILE_SYSTEM_OPTIONS:
4217 if (ParseFileSystemOptions(Record, false, Listener))
4221 case HEADER_SEARCH_OPTIONS:
4222 if (ParseHeaderSearchOptions(Record, false, Listener))
4226 case PREPROCESSOR_OPTIONS: {
4227 std::string IgnoredSuggestedPredefines;
4228 if (ParsePreprocessorOptions(Record, false, Listener,
4229 IgnoredSuggestedPredefines))
4234 case INPUT_FILE_OFFSETS: {
4235 if (!NeedsInputFiles)
4238 unsigned NumInputFiles = Record[0];
4239 unsigned NumUserFiles = Record[1];
4240 const uint32_t *InputFileOffs = (const uint32_t *)Blob.data();
4241 for (unsigned I = 0; I != NumInputFiles; ++I) {
4242 // Go find this input file.
4243 bool isSystemFile = I >= NumUserFiles;
4245 if (isSystemFile && !NeedsSystemInputFiles)
4246 break; // the rest are system input files
4248 BitstreamCursor &Cursor = InputFilesCursor;
4249 SavedStreamPosition SavedPosition(Cursor);
4250 Cursor.JumpToBit(InputFileOffs[I]);
4252 unsigned Code = Cursor.ReadCode();
4255 bool shouldContinue = false;
4256 switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) {
4258 bool Overridden = static_cast<bool>(Record[3]);
4259 shouldContinue = Listener.visitInputFile(Blob, isSystemFile, Overridden);
4262 if (!shouldContinue)
4269 // No other validation to perform.
4276 bool ASTReader::isAcceptableASTFile(StringRef Filename,
4277 FileManager &FileMgr,
4278 const LangOptions &LangOpts,
4279 const TargetOptions &TargetOpts,
4280 const PreprocessorOptions &PPOpts) {
4281 SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts, FileMgr);
4282 return !readASTFileControlBlock(Filename, FileMgr, validator);
4285 ASTReader::ASTReadResult
4286 ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
4287 // Enter the submodule block.
4288 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
4289 Error("malformed submodule block record in AST file");
4293 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
4295 Module *CurrentModule = nullptr;
4298 llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks();
4300 switch (Entry.Kind) {
4301 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
4302 case llvm::BitstreamEntry::Error:
4303 Error("malformed block record in AST file");
4305 case llvm::BitstreamEntry::EndBlock:
4307 case llvm::BitstreamEntry::Record:
4308 // The interesting case.
4315 switch (F.Stream.readRecord(Entry.ID, Record, &Blob)) {
4316 default: // Default behavior: ignore.
4319 case SUBMODULE_DEFINITION: {
4321 Error("missing submodule metadata record at beginning of block");
4325 if (Record.size() < 8) {
4326 Error("malformed module definition");
4330 StringRef Name = Blob;
4332 SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
4333 SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
4334 bool IsFramework = Record[Idx++];
4335 bool IsExplicit = Record[Idx++];
4336 bool IsSystem = Record[Idx++];
4337 bool IsExternC = Record[Idx++];
4338 bool InferSubmodules = Record[Idx++];
4339 bool InferExplicitSubmodules = Record[Idx++];
4340 bool InferExportWildcard = Record[Idx++];
4341 bool ConfigMacrosExhaustive = Record[Idx++];
4343 Module *ParentModule = nullptr;
4345 ParentModule = getSubmodule(Parent);
4347 // Retrieve this (sub)module from the module map, creating it if
4349 CurrentModule = ModMap.findOrCreateModule(Name, ParentModule, IsFramework,
4352 // FIXME: set the definition loc for CurrentModule, or call
4353 // ModMap.setInferredModuleAllowedBy()
4355 SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
4356 if (GlobalIndex >= SubmodulesLoaded.size() ||
4357 SubmodulesLoaded[GlobalIndex]) {
4358 Error("too many submodules");
4362 if (!ParentModule) {
4363 if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
4364 if (CurFile != F.File) {
4365 if (!Diags.isDiagnosticInFlight()) {
4366 Diag(diag::err_module_file_conflict)
4367 << CurrentModule->getTopLevelModuleName()
4368 << CurFile->getName()
4369 << F.File->getName();
4375 CurrentModule->setASTFile(F.File);
4378 CurrentModule->IsFromModuleFile = true;
4379 CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
4380 CurrentModule->IsExternC = IsExternC;
4381 CurrentModule->InferSubmodules = InferSubmodules;
4382 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
4383 CurrentModule->InferExportWildcard = InferExportWildcard;
4384 CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
4385 if (DeserializationListener)
4386 DeserializationListener->ModuleRead(GlobalID, CurrentModule);
4388 SubmodulesLoaded[GlobalIndex] = CurrentModule;
4390 // Clear out data that will be replaced by what is the module file.
4391 CurrentModule->LinkLibraries.clear();
4392 CurrentModule->ConfigMacros.clear();
4393 CurrentModule->UnresolvedConflicts.clear();
4394 CurrentModule->Conflicts.clear();
4398 case SUBMODULE_UMBRELLA_HEADER: {
4400 Error("missing submodule metadata record at beginning of block");
4407 if (const FileEntry *Umbrella = PP.getFileManager().getFile(Blob)) {
4408 if (!CurrentModule->getUmbrellaHeader())
4409 ModMap.setUmbrellaHeader(CurrentModule, Umbrella);
4410 else if (CurrentModule->getUmbrellaHeader() != Umbrella) {
4411 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
4412 Error("mismatched umbrella headers in submodule");
4419 case SUBMODULE_HEADER: {
4421 Error("missing submodule metadata record at beginning of block");
4428 // We lazily associate headers with their modules via the HeaderInfoTable.
4429 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
4430 // of complete filenames or remove it entirely.
4434 case SUBMODULE_EXCLUDED_HEADER: {
4436 Error("missing submodule metadata record at beginning of block");
4443 // We lazily associate headers with their modules via the HeaderInfoTable.
4444 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
4445 // of complete filenames or remove it entirely.
4449 case SUBMODULE_PRIVATE_HEADER: {
4451 Error("missing submodule metadata record at beginning of block");
4458 // We lazily associate headers with their modules via the HeaderInfoTable.
4459 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
4460 // of complete filenames or remove it entirely.
4464 case SUBMODULE_TOPHEADER: {
4466 Error("missing submodule metadata record at beginning of block");
4473 CurrentModule->addTopHeaderFilename(Blob);
4477 case SUBMODULE_UMBRELLA_DIR: {
4479 Error("missing submodule metadata record at beginning of block");
4486 if (const DirectoryEntry *Umbrella
4487 = PP.getFileManager().getDirectory(Blob)) {
4488 if (!CurrentModule->getUmbrellaDir())
4489 ModMap.setUmbrellaDir(CurrentModule, Umbrella);
4490 else if (CurrentModule->getUmbrellaDir() != Umbrella) {
4491 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
4492 Error("mismatched umbrella directories in submodule");
4499 case SUBMODULE_METADATA: {
4501 Error("submodule metadata record not at beginning of block");
4506 F.BaseSubmoduleID = getTotalNumSubmodules();
4507 F.LocalNumSubmodules = Record[0];
4508 unsigned LocalBaseSubmoduleID = Record[1];
4509 if (F.LocalNumSubmodules > 0) {
4510 // Introduce the global -> local mapping for submodules within this
4512 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));
4514 // Introduce the local -> global mapping for submodules within this
4516 F.SubmoduleRemap.insertOrReplace(
4517 std::make_pair(LocalBaseSubmoduleID,
4518 F.BaseSubmoduleID - LocalBaseSubmoduleID));
4521 // Increase size by >= 1 so we get a unique base index in the next module.
4522 SubmodulesLoaded.resize(SubmodulesLoaded.size() +
4523 std::max(F.LocalNumSubmodules, 1U));
4527 case SUBMODULE_IMPORTS: {
4529 Error("missing submodule metadata record at beginning of block");
4536 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
4537 UnresolvedModuleRef Unresolved;
4538 Unresolved.File = &F;
4539 Unresolved.Mod = CurrentModule;
4540 Unresolved.ID = Record[Idx];
4541 Unresolved.Kind = UnresolvedModuleRef::Import;
4542 Unresolved.IsWildcard = false;
4543 UnresolvedModuleRefs.push_back(Unresolved);
4548 case SUBMODULE_EXPORTS: {
4550 Error("missing submodule metadata record at beginning of block");
4557 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
4558 UnresolvedModuleRef Unresolved;
4559 Unresolved.File = &F;
4560 Unresolved.Mod = CurrentModule;
4561 Unresolved.ID = Record[Idx];
4562 Unresolved.Kind = UnresolvedModuleRef::Export;
4563 Unresolved.IsWildcard = Record[Idx + 1];
4564 UnresolvedModuleRefs.push_back(Unresolved);
4567 // Once we've loaded the set of exports, there's no reason to keep
4568 // the parsed, unresolved exports around.
4569 CurrentModule->UnresolvedExports.clear();
4572 case SUBMODULE_REQUIRES: {
4574 Error("missing submodule metadata record at beginning of block");
4581 CurrentModule->addRequirement(Blob, Record[0], Context.getLangOpts(),
4582 Context.getTargetInfo());
4586 case SUBMODULE_LINK_LIBRARY:
4588 Error("missing submodule metadata record at beginning of block");
4595 CurrentModule->LinkLibraries.push_back(
4596 Module::LinkLibrary(Blob, Record[0]));
4599 case SUBMODULE_CONFIG_MACRO:
4601 Error("missing submodule metadata record at beginning of block");
4608 CurrentModule->ConfigMacros.push_back(Blob.str());
4611 case SUBMODULE_CONFLICT: {
4613 Error("missing submodule metadata record at beginning of block");
4620 UnresolvedModuleRef Unresolved;
4621 Unresolved.File = &F;
4622 Unresolved.Mod = CurrentModule;
4623 Unresolved.ID = Record[0];
4624 Unresolved.Kind = UnresolvedModuleRef::Conflict;
4625 Unresolved.IsWildcard = false;
4626 Unresolved.String = Blob;
4627 UnresolvedModuleRefs.push_back(Unresolved);
4634 /// \brief Parse the record that corresponds to a LangOptions data
4637 /// This routine parses the language options from the AST file and then gives
4638 /// them to the AST listener if one is set.
4640 /// \returns true if the listener deems the file unacceptable, false otherwise.
4641 bool ASTReader::ParseLanguageOptions(const RecordData &Record,
4643 ASTReaderListener &Listener) {
4644 LangOptions LangOpts;
4646 #define LANGOPT(Name, Bits, Default, Description) \
4647 LangOpts.Name = Record[Idx++];
4648 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
4649 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
4650 #include "clang/Basic/LangOptions.def"
4651 #define SANITIZER(NAME, ID) LangOpts.Sanitize.ID = Record[Idx++];
4652 #include "clang/Basic/Sanitizers.def"
4654 ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
4655 VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
4656 LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
4658 unsigned Length = Record[Idx++];
4659 LangOpts.CurrentModule.assign(Record.begin() + Idx,
4660 Record.begin() + Idx + Length);
4665 for (unsigned N = Record[Idx++]; N; --N) {
4666 LangOpts.CommentOpts.BlockCommandNames.push_back(
4667 ReadString(Record, Idx));
4669 LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
4671 return Listener.ReadLanguageOptions(LangOpts, Complain);
4674 bool ASTReader::ParseTargetOptions(const RecordData &Record,
4676 ASTReaderListener &Listener) {
4678 TargetOptions TargetOpts;
4679 TargetOpts.Triple = ReadString(Record, Idx);
4680 TargetOpts.CPU = ReadString(Record, Idx);
4681 TargetOpts.ABI = ReadString(Record, Idx);
4682 for (unsigned N = Record[Idx++]; N; --N) {
4683 TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
4685 for (unsigned N = Record[Idx++]; N; --N) {
4686 TargetOpts.Features.push_back(ReadString(Record, Idx));
4689 return Listener.ReadTargetOptions(TargetOpts, Complain);
4692 bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
4693 ASTReaderListener &Listener) {
4694 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
4696 #define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
4697 #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
4698 DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
4699 #include "clang/Basic/DiagnosticOptions.def"
4701 for (unsigned N = Record[Idx++]; N; --N)
4702 DiagOpts->Warnings.push_back(ReadString(Record, Idx));
4703 for (unsigned N = Record[Idx++]; N; --N)
4704 DiagOpts->Remarks.push_back(ReadString(Record, Idx));
4706 return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
4709 bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
4710 ASTReaderListener &Listener) {
4711 FileSystemOptions FSOpts;
4713 FSOpts.WorkingDir = ReadString(Record, Idx);
4714 return Listener.ReadFileSystemOptions(FSOpts, Complain);
4717 bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
4719 ASTReaderListener &Listener) {
4720 HeaderSearchOptions HSOpts;
4722 HSOpts.Sysroot = ReadString(Record, Idx);
4725 for (unsigned N = Record[Idx++]; N; --N) {
4726 std::string Path = ReadString(Record, Idx);
4727 frontend::IncludeDirGroup Group
4728 = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
4729 bool IsFramework = Record[Idx++];
4730 bool IgnoreSysRoot = Record[Idx++];
4731 HSOpts.UserEntries.push_back(
4732 HeaderSearchOptions::Entry(Path, Group, IsFramework, IgnoreSysRoot));
4735 // System header prefixes.
4736 for (unsigned N = Record[Idx++]; N; --N) {
4737 std::string Prefix = ReadString(Record, Idx);
4738 bool IsSystemHeader = Record[Idx++];
4739 HSOpts.SystemHeaderPrefixes.push_back(
4740 HeaderSearchOptions::SystemHeaderPrefix(Prefix, IsSystemHeader));
4743 HSOpts.ResourceDir = ReadString(Record, Idx);
4744 HSOpts.ModuleCachePath = ReadString(Record, Idx);
4745 HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
4746 HSOpts.DisableModuleHash = Record[Idx++];
4747 HSOpts.UseBuiltinIncludes = Record[Idx++];
4748 HSOpts.UseStandardSystemIncludes = Record[Idx++];
4749 HSOpts.UseStandardCXXIncludes = Record[Idx++];
4750 HSOpts.UseLibcxx = Record[Idx++];
4752 return Listener.ReadHeaderSearchOptions(HSOpts, Complain);
4755 bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
4757 ASTReaderListener &Listener,
4758 std::string &SuggestedPredefines) {
4759 PreprocessorOptions PPOpts;
4762 // Macro definitions/undefs
4763 for (unsigned N = Record[Idx++]; N; --N) {
4764 std::string Macro = ReadString(Record, Idx);
4765 bool IsUndef = Record[Idx++];
4766 PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
4770 for (unsigned N = Record[Idx++]; N; --N) {
4771 PPOpts.Includes.push_back(ReadString(Record, Idx));
4775 for (unsigned N = Record[Idx++]; N; --N) {
4776 PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
4779 PPOpts.UsePredefines = Record[Idx++];
4780 PPOpts.DetailedRecord = Record[Idx++];
4781 PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
4782 PPOpts.ImplicitPTHInclude = ReadString(Record, Idx);
4783 PPOpts.ObjCXXARCStandardLibrary =
4784 static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
4785 SuggestedPredefines.clear();
4786 return Listener.ReadPreprocessorOptions(PPOpts, Complain,
4787 SuggestedPredefines);
4790 std::pair<ModuleFile *, unsigned>
4791 ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
4792 GlobalPreprocessedEntityMapType::iterator
4793 I = GlobalPreprocessedEntityMap.find(GlobalIndex);
4794 assert(I != GlobalPreprocessedEntityMap.end() &&
4795 "Corrupted global preprocessed entity map");
4796 ModuleFile *M = I->second;
4797 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
4798 return std::make_pair(M, LocalIndex);
4801 std::pair<PreprocessingRecord::iterator, PreprocessingRecord::iterator>
4802 ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
4803 if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
4804 return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
4805 Mod.NumPreprocessedEntities);
4807 return std::make_pair(PreprocessingRecord::iterator(),
4808 PreprocessingRecord::iterator());
4811 std::pair<ASTReader::ModuleDeclIterator, ASTReader::ModuleDeclIterator>
4812 ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
4813 return std::make_pair(ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
4814 ModuleDeclIterator(this, &Mod,
4815 Mod.FileSortedDecls + Mod.NumFileSortedDecls));
4818 PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
4819 PreprocessedEntityID PPID = Index+1;
4820 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
4821 ModuleFile &M = *PPInfo.first;
4822 unsigned LocalIndex = PPInfo.second;
4823 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
4825 if (!PP.getPreprocessingRecord()) {
4826 Error("no preprocessing record");
4830 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
4831 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset);
4833 llvm::BitstreamEntry Entry =
4834 M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
4835 if (Entry.Kind != llvm::BitstreamEntry::Record)
4839 SourceRange Range(ReadSourceLocation(M, PPOffs.Begin),
4840 ReadSourceLocation(M, PPOffs.End));
4841 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
4844 PreprocessorDetailRecordTypes RecType =
4845 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord(
4846 Entry.ID, Record, &Blob);
4848 case PPD_MACRO_EXPANSION: {
4849 bool isBuiltin = Record[0];
4850 IdentifierInfo *Name = nullptr;
4851 MacroDefinition *Def = nullptr;
4853 Name = getLocalIdentifier(M, Record[1]);
4855 PreprocessedEntityID
4856 GlobalID = getGlobalPreprocessedEntityID(M, Record[1]);
4857 Def =cast<MacroDefinition>(PPRec.getLoadedPreprocessedEntity(GlobalID-1));
4862 ME = new (PPRec) MacroExpansion(Name, Range);
4864 ME = new (PPRec) MacroExpansion(Def, Range);
4869 case PPD_MACRO_DEFINITION: {
4870 // Decode the identifier info and then check again; if the macro is
4871 // still defined and associated with the identifier,
4872 IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
4874 = new (PPRec) MacroDefinition(II, Range);
4876 if (DeserializationListener)
4877 DeserializationListener->MacroDefinitionRead(PPID, MD);
4882 case PPD_INCLUSION_DIRECTIVE: {
4883 const char *FullFileNameStart = Blob.data() + Record[0];
4884 StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
4885 const FileEntry *File = nullptr;
4886 if (!FullFileName.empty())
4887 File = PP.getFileManager().getFile(FullFileName);
4889 // FIXME: Stable encoding
4890 InclusionDirective::InclusionKind Kind
4891 = static_cast<InclusionDirective::InclusionKind>(Record[2]);
4892 InclusionDirective *ID
4893 = new (PPRec) InclusionDirective(PPRec, Kind,
4894 StringRef(Blob.data(), Record[0]),
4895 Record[1], Record[3],
4902 llvm_unreachable("Invalid PreprocessorDetailRecordTypes");
4905 /// \brief \arg SLocMapI points at a chunk of a module that contains no
4906 /// preprocessed entities or the entities it contains are not the ones we are
4907 /// looking for. Find the next module that contains entities and return the ID
4908 /// of the first entry.
4909 PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
4910 GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
4912 for (GlobalSLocOffsetMapType::const_iterator
4913 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
4914 ModuleFile &M = *SLocMapI->second;
4915 if (M.NumPreprocessedEntities)
4916 return M.BasePreprocessedEntityID;
4919 return getTotalNumPreprocessedEntities();
4924 template <unsigned PPEntityOffset::*PPLoc>
4925 struct PPEntityComp {
4926 const ASTReader &Reader;
4929 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) { }
4931 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
4932 SourceLocation LHS = getLoc(L);
4933 SourceLocation RHS = getLoc(R);
4934 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
4937 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
4938 SourceLocation LHS = getLoc(L);
4939 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
4942 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
4943 SourceLocation RHS = getLoc(R);
4944 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
4947 SourceLocation getLoc(const PPEntityOffset &PPE) const {
4948 return Reader.ReadSourceLocation(M, PPE.*PPLoc);
4954 PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
4955 bool EndsAfter) const {
4956 if (SourceMgr.isLocalSourceLocation(Loc))
4957 return getTotalNumPreprocessedEntities();
4959 GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
4960 SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
4961 assert(SLocMapI != GlobalSLocOffsetMap.end() &&
4962 "Corrupted global sloc offset map");
4964 if (SLocMapI->second->NumPreprocessedEntities == 0)
4965 return findNextPreprocessedEntity(SLocMapI);
4967 ModuleFile &M = *SLocMapI->second;
4968 typedef const PPEntityOffset *pp_iterator;
4969 pp_iterator pp_begin = M.PreprocessedEntityOffsets;
4970 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
4972 size_t Count = M.NumPreprocessedEntities;
4974 pp_iterator First = pp_begin;
4978 PPI = std::upper_bound(pp_begin, pp_end, Loc,
4979 PPEntityComp<&PPEntityOffset::Begin>(*this, M));
4981 // Do a binary search manually instead of using std::lower_bound because
4982 // The end locations of entities may be unordered (when a macro expansion
4983 // is inside another macro argument), but for this case it is not important
4984 // whether we get the first macro expansion or its containing macro.
4988 std::advance(PPI, Half);
4989 if (SourceMgr.isBeforeInTranslationUnit(ReadSourceLocation(M, PPI->End),
4993 Count = Count - Half - 1;
5000 return findNextPreprocessedEntity(SLocMapI);
5002 return M.BasePreprocessedEntityID + (PPI - pp_begin);
5005 /// \brief Returns a pair of [Begin, End) indices of preallocated
5006 /// preprocessed entities that \arg Range encompasses.
5007 std::pair<unsigned, unsigned>
5008 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
5009 if (Range.isInvalid())
5010 return std::make_pair(0,0);
5011 assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()));
5013 PreprocessedEntityID BeginID =
5014 findPreprocessedEntity(Range.getBegin(), false);
5015 PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
5016 return std::make_pair(BeginID, EndID);
5019 /// \brief Optionally returns true or false if the preallocated preprocessed
5020 /// entity with index \arg Index came from file \arg FID.
5021 Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
5023 if (FID.isInvalid())
5026 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5027 ModuleFile &M = *PPInfo.first;
5028 unsigned LocalIndex = PPInfo.second;
5029 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5031 SourceLocation Loc = ReadSourceLocation(M, PPOffs.Begin);
5032 if (Loc.isInvalid())
5035 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
5042 /// \brief Visitor used to search for information about a header file.
5043 class HeaderFileInfoVisitor {
5044 const FileEntry *FE;
5046 Optional<HeaderFileInfo> HFI;
5049 explicit HeaderFileInfoVisitor(const FileEntry *FE)
5052 static bool visit(ModuleFile &M, void *UserData) {
5053 HeaderFileInfoVisitor *This
5054 = static_cast<HeaderFileInfoVisitor *>(UserData);
5056 HeaderFileInfoLookupTable *Table
5057 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
5061 // Look in the on-disk hash table for an entry for this file name.
5062 HeaderFileInfoLookupTable::iterator Pos = Table->find(This->FE);
5063 if (Pos == Table->end())
5070 Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
5074 HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
5075 HeaderFileInfoVisitor Visitor(FE);
5076 ModuleMgr.visit(&HeaderFileInfoVisitor::visit, &Visitor);
5077 if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
5080 return HeaderFileInfo();
5083 void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
5084 // FIXME: Make it work properly with modules.
5085 SmallVector<DiagnosticsEngine::DiagState *, 32> DiagStates;
5086 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) {
5087 ModuleFile &F = *(*I);
5090 assert(!Diag.DiagStates.empty());
5091 DiagStates.push_back(&Diag.DiagStates.front()); // the command-line one.
5092 while (Idx < F.PragmaDiagMappings.size()) {
5093 SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
5094 unsigned DiagStateID = F.PragmaDiagMappings[Idx++];
5095 if (DiagStateID != 0) {
5096 Diag.DiagStatePoints.push_back(
5097 DiagnosticsEngine::DiagStatePoint(DiagStates[DiagStateID-1],
5098 FullSourceLoc(Loc, SourceMgr)));
5102 assert(DiagStateID == 0);
5103 // A new DiagState was created here.
5104 Diag.DiagStates.push_back(*Diag.GetCurDiagState());
5105 DiagnosticsEngine::DiagState *NewState = &Diag.DiagStates.back();
5106 DiagStates.push_back(NewState);
5107 Diag.DiagStatePoints.push_back(
5108 DiagnosticsEngine::DiagStatePoint(NewState,
5109 FullSourceLoc(Loc, SourceMgr)));
5111 assert(Idx < F.PragmaDiagMappings.size() &&
5112 "Invalid data, didn't find '-1' marking end of diag/map pairs");
5113 if (Idx >= F.PragmaDiagMappings.size()) {
5114 break; // Something is messed up but at least avoid infinite loop in
5117 unsigned DiagID = F.PragmaDiagMappings[Idx++];
5118 if (DiagID == (unsigned)-1) {
5119 break; // no more diag/map pairs for this location.
5121 diag::Severity Map = (diag::Severity)F.PragmaDiagMappings[Idx++];
5122 DiagnosticMapping Mapping = Diag.makeUserMapping(Map, Loc);
5123 Diag.GetCurDiagState()->setMapping(DiagID, Mapping);
5129 /// \brief Get the correct cursor and offset for loading a type.
5130 ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
5131 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
5132 assert(I != GlobalTypeMap.end() && "Corrupted global type map");
5133 ModuleFile *M = I->second;
5134 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
5137 /// \brief Read and return the type with the given index..
5139 /// The index is the type ID, shifted and minus the number of predefs. This
5140 /// routine actually reads the record corresponding to the type at the given
5141 /// location. It is a helper routine for GetType, which deals with reading type
5143 QualType ASTReader::readTypeRecord(unsigned Index) {
5144 RecordLocation Loc = TypeCursorForIndex(Index);
5145 BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
5147 // Keep track of where we are in the stream, then jump back there
5148 // after reading this type.
5149 SavedStreamPosition SavedPosition(DeclsCursor);
5151 ReadingKindTracker ReadingKind(Read_Type, *this);
5153 // Note that we are loading a type record.
5154 Deserializing AType(this);
5157 DeclsCursor.JumpToBit(Loc.Offset);
5159 unsigned Code = DeclsCursor.ReadCode();
5160 switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) {
5161 case TYPE_EXT_QUAL: {
5162 if (Record.size() != 2) {
5163 Error("Incorrect encoding of extended qualifier type");
5166 QualType Base = readType(*Loc.F, Record, Idx);
5167 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
5168 return Context.getQualifiedType(Base, Quals);
5171 case TYPE_COMPLEX: {
5172 if (Record.size() != 1) {
5173 Error("Incorrect encoding of complex type");
5176 QualType ElemType = readType(*Loc.F, Record, Idx);
5177 return Context.getComplexType(ElemType);
5180 case TYPE_POINTER: {
5181 if (Record.size() != 1) {
5182 Error("Incorrect encoding of pointer type");
5185 QualType PointeeType = readType(*Loc.F, Record, Idx);
5186 return Context.getPointerType(PointeeType);
5189 case TYPE_DECAYED: {
5190 if (Record.size() != 1) {
5191 Error("Incorrect encoding of decayed type");
5194 QualType OriginalType = readType(*Loc.F, Record, Idx);
5195 QualType DT = Context.getAdjustedParameterType(OriginalType);
5196 if (!isa<DecayedType>(DT))
5197 Error("Decayed type does not decay");
5201 case TYPE_ADJUSTED: {
5202 if (Record.size() != 2) {
5203 Error("Incorrect encoding of adjusted type");
5206 QualType OriginalTy = readType(*Loc.F, Record, Idx);
5207 QualType AdjustedTy = readType(*Loc.F, Record, Idx);
5208 return Context.getAdjustedType(OriginalTy, AdjustedTy);
5211 case TYPE_BLOCK_POINTER: {
5212 if (Record.size() != 1) {
5213 Error("Incorrect encoding of block pointer type");
5216 QualType PointeeType = readType(*Loc.F, Record, Idx);
5217 return Context.getBlockPointerType(PointeeType);
5220 case TYPE_LVALUE_REFERENCE: {
5221 if (Record.size() != 2) {
5222 Error("Incorrect encoding of lvalue reference type");
5225 QualType PointeeType = readType(*Loc.F, Record, Idx);
5226 return Context.getLValueReferenceType(PointeeType, Record[1]);
5229 case TYPE_RVALUE_REFERENCE: {
5230 if (Record.size() != 1) {
5231 Error("Incorrect encoding of rvalue reference type");
5234 QualType PointeeType = readType(*Loc.F, Record, Idx);
5235 return Context.getRValueReferenceType(PointeeType);
5238 case TYPE_MEMBER_POINTER: {
5239 if (Record.size() != 2) {
5240 Error("Incorrect encoding of member pointer type");
5243 QualType PointeeType = readType(*Loc.F, Record, Idx);
5244 QualType ClassType = readType(*Loc.F, Record, Idx);
5245 if (PointeeType.isNull() || ClassType.isNull())
5248 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
5251 case TYPE_CONSTANT_ARRAY: {
5252 QualType ElementType = readType(*Loc.F, Record, Idx);
5253 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5254 unsigned IndexTypeQuals = Record[2];
5256 llvm::APInt Size = ReadAPInt(Record, Idx);
5257 return Context.getConstantArrayType(ElementType, Size,
5258 ASM, IndexTypeQuals);
5261 case TYPE_INCOMPLETE_ARRAY: {
5262 QualType ElementType = readType(*Loc.F, Record, Idx);
5263 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5264 unsigned IndexTypeQuals = Record[2];
5265 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
5268 case TYPE_VARIABLE_ARRAY: {
5269 QualType ElementType = readType(*Loc.F, Record, Idx);
5270 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5271 unsigned IndexTypeQuals = Record[2];
5272 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
5273 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
5274 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
5275 ASM, IndexTypeQuals,
5276 SourceRange(LBLoc, RBLoc));
5280 if (Record.size() != 3) {
5281 Error("incorrect encoding of vector type in AST file");
5285 QualType ElementType = readType(*Loc.F, Record, Idx);
5286 unsigned NumElements = Record[1];
5287 unsigned VecKind = Record[2];
5288 return Context.getVectorType(ElementType, NumElements,
5289 (VectorType::VectorKind)VecKind);
5292 case TYPE_EXT_VECTOR: {
5293 if (Record.size() != 3) {
5294 Error("incorrect encoding of extended vector type in AST file");
5298 QualType ElementType = readType(*Loc.F, Record, Idx);
5299 unsigned NumElements = Record[1];
5300 return Context.getExtVectorType(ElementType, NumElements);
5303 case TYPE_FUNCTION_NO_PROTO: {
5304 if (Record.size() != 6) {
5305 Error("incorrect encoding of no-proto function type");
5308 QualType ResultType = readType(*Loc.F, Record, Idx);
5309 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
5310 (CallingConv)Record[4], Record[5]);
5311 return Context.getFunctionNoProtoType(ResultType, Info);
5314 case TYPE_FUNCTION_PROTO: {
5315 QualType ResultType = readType(*Loc.F, Record, Idx);
5317 FunctionProtoType::ExtProtoInfo EPI;
5318 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
5319 /*hasregparm*/ Record[2],
5320 /*regparm*/ Record[3],
5321 static_cast<CallingConv>(Record[4]),
5322 /*produces*/ Record[5]);
5326 EPI.Variadic = Record[Idx++];
5327 EPI.HasTrailingReturn = Record[Idx++];
5328 EPI.TypeQuals = Record[Idx++];
5329 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
5330 SmallVector<QualType, 8> ExceptionStorage;
5331 readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);
5333 unsigned NumParams = Record[Idx++];
5334 SmallVector<QualType, 16> ParamTypes;
5335 for (unsigned I = 0; I != NumParams; ++I)
5336 ParamTypes.push_back(readType(*Loc.F, Record, Idx));
5338 return Context.getFunctionType(ResultType, ParamTypes, EPI);
5341 case TYPE_UNRESOLVED_USING: {
5343 return Context.getTypeDeclType(
5344 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
5347 case TYPE_TYPEDEF: {
5348 if (Record.size() != 2) {
5349 Error("incorrect encoding of typedef type");
5353 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
5354 QualType Canonical = readType(*Loc.F, Record, Idx);
5355 if (!Canonical.isNull())
5356 Canonical = Context.getCanonicalType(Canonical);
5357 return Context.getTypedefType(Decl, Canonical);
5360 case TYPE_TYPEOF_EXPR:
5361 return Context.getTypeOfExprType(ReadExpr(*Loc.F));
5364 if (Record.size() != 1) {
5365 Error("incorrect encoding of typeof(type) in AST file");
5368 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
5369 return Context.getTypeOfType(UnderlyingType);
5372 case TYPE_DECLTYPE: {
5373 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
5374 return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
5377 case TYPE_UNARY_TRANSFORM: {
5378 QualType BaseType = readType(*Loc.F, Record, Idx);
5379 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
5380 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
5381 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
5385 QualType Deduced = readType(*Loc.F, Record, Idx);
5386 bool IsDecltypeAuto = Record[Idx++];
5387 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
5388 return Context.getAutoType(Deduced, IsDecltypeAuto, IsDependent);
5392 if (Record.size() != 2) {
5393 Error("incorrect encoding of record type");
5397 bool IsDependent = Record[Idx++];
5398 RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
5399 RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
5400 QualType T = Context.getRecordType(RD);
5401 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
5406 if (Record.size() != 2) {
5407 Error("incorrect encoding of enum type");
5411 bool IsDependent = Record[Idx++];
5413 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
5414 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
5418 case TYPE_ATTRIBUTED: {
5419 if (Record.size() != 3) {
5420 Error("incorrect encoding of attributed type");
5423 QualType modifiedType = readType(*Loc.F, Record, Idx);
5424 QualType equivalentType = readType(*Loc.F, Record, Idx);
5425 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]);
5426 return Context.getAttributedType(kind, modifiedType, equivalentType);
5430 if (Record.size() != 1) {
5431 Error("incorrect encoding of paren type");
5434 QualType InnerType = readType(*Loc.F, Record, Idx);
5435 return Context.getParenType(InnerType);
5438 case TYPE_PACK_EXPANSION: {
5439 if (Record.size() != 2) {
5440 Error("incorrect encoding of pack expansion type");
5443 QualType Pattern = readType(*Loc.F, Record, Idx);
5444 if (Pattern.isNull())
5446 Optional<unsigned> NumExpansions;
5448 NumExpansions = Record[1] - 1;
5449 return Context.getPackExpansionType(Pattern, NumExpansions);
5452 case TYPE_ELABORATED: {
5454 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
5455 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
5456 QualType NamedType = readType(*Loc.F, Record, Idx);
5457 return Context.getElaboratedType(Keyword, NNS, NamedType);
5460 case TYPE_OBJC_INTERFACE: {
5462 ObjCInterfaceDecl *ItfD
5463 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx);
5464 return Context.getObjCInterfaceType(ItfD->getCanonicalDecl());
5467 case TYPE_OBJC_OBJECT: {
5469 QualType Base = readType(*Loc.F, Record, Idx);
5470 unsigned NumProtos = Record[Idx++];
5471 SmallVector<ObjCProtocolDecl*, 4> Protos;
5472 for (unsigned I = 0; I != NumProtos; ++I)
5473 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
5474 return Context.getObjCObjectType(Base, Protos.data(), NumProtos);
5477 case TYPE_OBJC_OBJECT_POINTER: {
5479 QualType Pointee = readType(*Loc.F, Record, Idx);
5480 return Context.getObjCObjectPointerType(Pointee);
5483 case TYPE_SUBST_TEMPLATE_TYPE_PARM: {
5485 QualType Parm = readType(*Loc.F, Record, Idx);
5486 QualType Replacement = readType(*Loc.F, Record, Idx);
5487 return Context.getSubstTemplateTypeParmType(
5488 cast<TemplateTypeParmType>(Parm),
5489 Context.getCanonicalType(Replacement));
5492 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: {
5494 QualType Parm = readType(*Loc.F, Record, Idx);
5495 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx);
5496 return Context.getSubstTemplateTypeParmPackType(
5497 cast<TemplateTypeParmType>(Parm),
5501 case TYPE_INJECTED_CLASS_NAME: {
5502 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx);
5503 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable
5504 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable
5505 // for AST reading, too much interdependencies.
5507 if (const Type *Existing = D->getTypeForDecl())
5509 else if (auto *Prev = D->getPreviousDecl())
5510 T = Prev->getTypeForDecl();
5512 T = new (Context, TypeAlignment) InjectedClassNameType(D, TST);
5513 return QualType(T, 0);
5516 case TYPE_TEMPLATE_TYPE_PARM: {
5518 unsigned Depth = Record[Idx++];
5519 unsigned Index = Record[Idx++];
5520 bool Pack = Record[Idx++];
5521 TemplateTypeParmDecl *D
5522 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx);
5523 return Context.getTemplateTypeParmType(Depth, Index, Pack, D);
5526 case TYPE_DEPENDENT_NAME: {
5528 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
5529 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
5530 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx);
5531 QualType Canon = readType(*Loc.F, Record, Idx);
5532 if (!Canon.isNull())
5533 Canon = Context.getCanonicalType(Canon);
5534 return Context.getDependentNameType(Keyword, NNS, Name, Canon);
5537 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: {
5539 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
5540 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
5541 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx);
5542 unsigned NumArgs = Record[Idx++];
5543 SmallVector<TemplateArgument, 8> Args;
5544 Args.reserve(NumArgs);
5546 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx));
5547 return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name,
5548 Args.size(), Args.data());
5551 case TYPE_DEPENDENT_SIZED_ARRAY: {
5555 QualType ElementType = readType(*Loc.F, Record, Idx);
5556 ArrayType::ArraySizeModifier ASM
5557 = (ArrayType::ArraySizeModifier)Record[Idx++];
5558 unsigned IndexTypeQuals = Record[Idx++];
5560 // DependentSizedArrayType
5561 Expr *NumElts = ReadExpr(*Loc.F);
5562 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx);
5564 return Context.getDependentSizedArrayType(ElementType, NumElts, ASM,
5565 IndexTypeQuals, Brackets);
5568 case TYPE_TEMPLATE_SPECIALIZATION: {
5570 bool IsDependent = Record[Idx++];
5571 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
5572 SmallVector<TemplateArgument, 8> Args;
5573 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx);
5574 QualType Underlying = readType(*Loc.F, Record, Idx);
5576 if (Underlying.isNull())
5577 T = Context.getCanonicalTemplateSpecializationType(Name, Args.data(),
5580 T = Context.getTemplateSpecializationType(Name, Args.data(),
5581 Args.size(), Underlying);
5582 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
5587 if (Record.size() != 1) {
5588 Error("Incorrect encoding of atomic type");
5591 QualType ValueType = readType(*Loc.F, Record, Idx);
5592 return Context.getAtomicType(ValueType);
5595 llvm_unreachable("Invalid TypeCode!");
5598 void ASTReader::readExceptionSpec(ModuleFile &ModuleFile,
5599 SmallVectorImpl<QualType> &Exceptions,
5600 FunctionProtoType::ExceptionSpecInfo &ESI,
5601 const RecordData &Record, unsigned &Idx) {
5602 ExceptionSpecificationType EST =
5603 static_cast<ExceptionSpecificationType>(Record[Idx++]);
5605 if (EST == EST_Dynamic) {
5606 for (unsigned I = 0, N = Record[Idx++]; I != N; ++I)
5607 Exceptions.push_back(readType(ModuleFile, Record, Idx));
5608 ESI.Exceptions = Exceptions;
5609 } else if (EST == EST_ComputedNoexcept) {
5610 ESI.NoexceptExpr = ReadExpr(ModuleFile);
5611 } else if (EST == EST_Uninstantiated) {
5612 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
5613 ESI.SourceTemplate = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
5614 } else if (EST == EST_Unevaluated) {
5615 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
5619 class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> {
5622 const ASTReader::RecordData &Record;
5625 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R,
5627 return Reader.ReadSourceLocation(F, R, I);
5630 template<typename T>
5631 T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) {
5632 return Reader.ReadDeclAs<T>(F, Record, Idx);
5636 TypeLocReader(ASTReader &Reader, ModuleFile &F,
5637 const ASTReader::RecordData &Record, unsigned &Idx)
5638 : Reader(Reader), F(F), Record(Record), Idx(Idx)
5641 // We want compile-time assurance that we've enumerated all of
5642 // these, so unfortunately we have to declare them first, then
5643 // define them out-of-line.
5644 #define ABSTRACT_TYPELOC(CLASS, PARENT)
5645 #define TYPELOC(CLASS, PARENT) \
5646 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
5647 #include "clang/AST/TypeLocNodes.def"
5649 void VisitFunctionTypeLoc(FunctionTypeLoc);
5650 void VisitArrayTypeLoc(ArrayTypeLoc);
5653 void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
5656 void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
5657 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx));
5658 if (TL.needsExtraLocalData()) {
5659 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++]));
5660 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++]));
5661 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++]));
5662 TL.setModeAttr(Record[Idx++]);
5665 void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
5666 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5668 void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
5669 TL.setStarLoc(ReadSourceLocation(Record, Idx));
5671 void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
5674 void TypeLocReader::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
5677 void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
5678 TL.setCaretLoc(ReadSourceLocation(Record, Idx));
5680 void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
5681 TL.setAmpLoc(ReadSourceLocation(Record, Idx));
5683 void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
5684 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx));
5686 void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
5687 TL.setStarLoc(ReadSourceLocation(Record, Idx));
5688 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx));
5690 void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
5691 TL.setLBracketLoc(ReadSourceLocation(Record, Idx));
5692 TL.setRBracketLoc(ReadSourceLocation(Record, Idx));
5694 TL.setSizeExpr(Reader.ReadExpr(F));
5696 TL.setSizeExpr(nullptr);
5698 void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
5699 VisitArrayTypeLoc(TL);
5701 void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
5702 VisitArrayTypeLoc(TL);
5704 void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
5705 VisitArrayTypeLoc(TL);
5707 void TypeLocReader::VisitDependentSizedArrayTypeLoc(
5708 DependentSizedArrayTypeLoc TL) {
5709 VisitArrayTypeLoc(TL);
5711 void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
5712 DependentSizedExtVectorTypeLoc TL) {
5713 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5715 void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
5716 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5718 void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
5719 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5721 void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
5722 TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx));
5723 TL.setLParenLoc(ReadSourceLocation(Record, Idx));
5724 TL.setRParenLoc(ReadSourceLocation(Record, Idx));
5725 TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx));
5726 for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i) {
5727 TL.setParam(i, ReadDeclAs<ParmVarDecl>(Record, Idx));
5730 void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
5731 VisitFunctionTypeLoc(TL);
5733 void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
5734 VisitFunctionTypeLoc(TL);
5736 void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
5737 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5739 void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
5740 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5742 void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
5743 TL.setTypeofLoc(ReadSourceLocation(Record, Idx));
5744 TL.setLParenLoc(ReadSourceLocation(Record, Idx));
5745 TL.setRParenLoc(ReadSourceLocation(Record, Idx));
5747 void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
5748 TL.setTypeofLoc(ReadSourceLocation(Record, Idx));
5749 TL.setLParenLoc(ReadSourceLocation(Record, Idx));
5750 TL.setRParenLoc(ReadSourceLocation(Record, Idx));
5751 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx));
5753 void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
5754 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5756 void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
5757 TL.setKWLoc(ReadSourceLocation(Record, Idx));
5758 TL.setLParenLoc(ReadSourceLocation(Record, Idx));
5759 TL.setRParenLoc(ReadSourceLocation(Record, Idx));
5760 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx));
5762 void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) {
5763 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5765 void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
5766 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5768 void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
5769 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5771 void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
5772 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx));
5773 if (TL.hasAttrOperand()) {
5775 range.setBegin(ReadSourceLocation(Record, Idx));
5776 range.setEnd(ReadSourceLocation(Record, Idx));
5777 TL.setAttrOperandParensRange(range);
5779 if (TL.hasAttrExprOperand()) {
5781 TL.setAttrExprOperand(Reader.ReadExpr(F));
5783 TL.setAttrExprOperand(nullptr);
5784 } else if (TL.hasAttrEnumOperand())
5785 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx));
5787 void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
5788 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5790 void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
5791 SubstTemplateTypeParmTypeLoc TL) {
5792 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5794 void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc(
5795 SubstTemplateTypeParmPackTypeLoc TL) {
5796 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5798 void TypeLocReader::VisitTemplateSpecializationTypeLoc(
5799 TemplateSpecializationTypeLoc TL) {
5800 TL.setTemplateKeywordLoc(ReadSourceLocation(Record, Idx));
5801 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx));
5802 TL.setLAngleLoc(ReadSourceLocation(Record, Idx));
5803 TL.setRAngleLoc(ReadSourceLocation(Record, Idx));
5804 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
5806 Reader.GetTemplateArgumentLocInfo(F,
5807 TL.getTypePtr()->getArg(i).getKind(),
5810 void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) {
5811 TL.setLParenLoc(ReadSourceLocation(Record, Idx));
5812 TL.setRParenLoc(ReadSourceLocation(Record, Idx));
5814 void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
5815 TL.setElaboratedKeywordLoc(ReadSourceLocation(Record, Idx));
5816 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx));
5818 void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
5819 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5821 void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
5822 TL.setElaboratedKeywordLoc(ReadSourceLocation(Record, Idx));
5823 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx));
5824 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5826 void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
5827 DependentTemplateSpecializationTypeLoc TL) {
5828 TL.setElaboratedKeywordLoc(ReadSourceLocation(Record, Idx));
5829 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx));
5830 TL.setTemplateKeywordLoc(ReadSourceLocation(Record, Idx));
5831 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx));
5832 TL.setLAngleLoc(ReadSourceLocation(Record, Idx));
5833 TL.setRAngleLoc(ReadSourceLocation(Record, Idx));
5834 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
5836 Reader.GetTemplateArgumentLocInfo(F,
5837 TL.getTypePtr()->getArg(I).getKind(),
5840 void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
5841 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx));
5843 void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
5844 TL.setNameLoc(ReadSourceLocation(Record, Idx));
5846 void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
5847 TL.setHasBaseTypeAsWritten(Record[Idx++]);
5848 TL.setLAngleLoc(ReadSourceLocation(Record, Idx));
5849 TL.setRAngleLoc(ReadSourceLocation(Record, Idx));
5850 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
5851 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx));
5853 void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
5854 TL.setStarLoc(ReadSourceLocation(Record, Idx));
5856 void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
5857 TL.setKWLoc(ReadSourceLocation(Record, Idx));
5858 TL.setLParenLoc(ReadSourceLocation(Record, Idx));
5859 TL.setRParenLoc(ReadSourceLocation(Record, Idx));
5862 TypeSourceInfo *ASTReader::GetTypeSourceInfo(ModuleFile &F,
5863 const RecordData &Record,
5865 QualType InfoTy = readType(F, Record, Idx);
5866 if (InfoTy.isNull())
5869 TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy);
5870 TypeLocReader TLR(*this, F, Record, Idx);
5871 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc())
5876 QualType ASTReader::GetType(TypeID ID) {
5877 unsigned FastQuals = ID & Qualifiers::FastMask;
5878 unsigned Index = ID >> Qualifiers::FastWidth;
5880 if (Index < NUM_PREDEF_TYPE_IDS) {
5882 switch ((PredefinedTypeIDs)Index) {
5883 case PREDEF_TYPE_NULL_ID: return QualType();
5884 case PREDEF_TYPE_VOID_ID: T = Context.VoidTy; break;
5885 case PREDEF_TYPE_BOOL_ID: T = Context.BoolTy; break;
5887 case PREDEF_TYPE_CHAR_U_ID:
5888 case PREDEF_TYPE_CHAR_S_ID:
5889 // FIXME: Check that the signedness of CharTy is correct!
5893 case PREDEF_TYPE_UCHAR_ID: T = Context.UnsignedCharTy; break;
5894 case PREDEF_TYPE_USHORT_ID: T = Context.UnsignedShortTy; break;
5895 case PREDEF_TYPE_UINT_ID: T = Context.UnsignedIntTy; break;
5896 case PREDEF_TYPE_ULONG_ID: T = Context.UnsignedLongTy; break;
5897 case PREDEF_TYPE_ULONGLONG_ID: T = Context.UnsignedLongLongTy; break;
5898 case PREDEF_TYPE_UINT128_ID: T = Context.UnsignedInt128Ty; break;
5899 case PREDEF_TYPE_SCHAR_ID: T = Context.SignedCharTy; break;
5900 case PREDEF_TYPE_WCHAR_ID: T = Context.WCharTy; break;
5901 case PREDEF_TYPE_SHORT_ID: T = Context.ShortTy; break;
5902 case PREDEF_TYPE_INT_ID: T = Context.IntTy; break;
5903 case PREDEF_TYPE_LONG_ID: T = Context.LongTy; break;
5904 case PREDEF_TYPE_LONGLONG_ID: T = Context.LongLongTy; break;
5905 case PREDEF_TYPE_INT128_ID: T = Context.Int128Ty; break;
5906 case PREDEF_TYPE_HALF_ID: T = Context.HalfTy; break;
5907 case PREDEF_TYPE_FLOAT_ID: T = Context.FloatTy; break;
5908 case PREDEF_TYPE_DOUBLE_ID: T = Context.DoubleTy; break;
5909 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context.LongDoubleTy; break;
5910 case PREDEF_TYPE_OVERLOAD_ID: T = Context.OverloadTy; break;
5911 case PREDEF_TYPE_BOUND_MEMBER: T = Context.BoundMemberTy; break;
5912 case PREDEF_TYPE_PSEUDO_OBJECT: T = Context.PseudoObjectTy; break;
5913 case PREDEF_TYPE_DEPENDENT_ID: T = Context.DependentTy; break;
5914 case PREDEF_TYPE_UNKNOWN_ANY: T = Context.UnknownAnyTy; break;
5915 case PREDEF_TYPE_NULLPTR_ID: T = Context.NullPtrTy; break;
5916 case PREDEF_TYPE_CHAR16_ID: T = Context.Char16Ty; break;
5917 case PREDEF_TYPE_CHAR32_ID: T = Context.Char32Ty; break;
5918 case PREDEF_TYPE_OBJC_ID: T = Context.ObjCBuiltinIdTy; break;
5919 case PREDEF_TYPE_OBJC_CLASS: T = Context.ObjCBuiltinClassTy; break;
5920 case PREDEF_TYPE_OBJC_SEL: T = Context.ObjCBuiltinSelTy; break;
5921 case PREDEF_TYPE_IMAGE1D_ID: T = Context.OCLImage1dTy; break;
5922 case PREDEF_TYPE_IMAGE1D_ARR_ID: T = Context.OCLImage1dArrayTy; break;
5923 case PREDEF_TYPE_IMAGE1D_BUFF_ID: T = Context.OCLImage1dBufferTy; break;
5924 case PREDEF_TYPE_IMAGE2D_ID: T = Context.OCLImage2dTy; break;
5925 case PREDEF_TYPE_IMAGE2D_ARR_ID: T = Context.OCLImage2dArrayTy; break;
5926 case PREDEF_TYPE_IMAGE3D_ID: T = Context.OCLImage3dTy; break;
5927 case PREDEF_TYPE_SAMPLER_ID: T = Context.OCLSamplerTy; break;
5928 case PREDEF_TYPE_EVENT_ID: T = Context.OCLEventTy; break;
5929 case PREDEF_TYPE_AUTO_DEDUCT: T = Context.getAutoDeductType(); break;
5931 case PREDEF_TYPE_AUTO_RREF_DEDUCT:
5932 T = Context.getAutoRRefDeductType();
5935 case PREDEF_TYPE_ARC_UNBRIDGED_CAST:
5936 T = Context.ARCUnbridgedCastTy;
5939 case PREDEF_TYPE_VA_LIST_TAG:
5940 T = Context.getVaListTagType();
5943 case PREDEF_TYPE_BUILTIN_FN:
5944 T = Context.BuiltinFnTy;
5948 assert(!T.isNull() && "Unknown predefined type");
5949 return T.withFastQualifiers(FastQuals);
5952 Index -= NUM_PREDEF_TYPE_IDS;
5953 assert(Index < TypesLoaded.size() && "Type index out-of-range");
5954 if (TypesLoaded[Index].isNull()) {
5955 TypesLoaded[Index] = readTypeRecord(Index);
5956 if (TypesLoaded[Index].isNull())
5959 TypesLoaded[Index]->setFromAST();
5960 if (DeserializationListener)
5961 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID),
5962 TypesLoaded[Index]);
5965 return TypesLoaded[Index].withFastQualifiers(FastQuals);
5968 QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
5969 return GetType(getGlobalTypeID(F, LocalID));
5972 serialization::TypeID
5973 ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
5974 unsigned FastQuals = LocalID & Qualifiers::FastMask;
5975 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;
5977 if (LocalIndex < NUM_PREDEF_TYPE_IDS)
5980 ContinuousRangeMap<uint32_t, int, 2>::iterator I
5981 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS);
5982 assert(I != F.TypeRemap.end() && "Invalid index into type index remap");
5984 unsigned GlobalIndex = LocalIndex + I->second;
5985 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
5988 TemplateArgumentLocInfo
5989 ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F,
5990 TemplateArgument::ArgKind Kind,
5991 const RecordData &Record,
5994 case TemplateArgument::Expression:
5996 case TemplateArgument::Type:
5997 return GetTypeSourceInfo(F, Record, Index);
5998 case TemplateArgument::Template: {
5999 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6001 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6002 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6005 case TemplateArgument::TemplateExpansion: {
6006 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6008 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6009 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index);
6010 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6013 case TemplateArgument::Null:
6014 case TemplateArgument::Integral:
6015 case TemplateArgument::Declaration:
6016 case TemplateArgument::NullPtr:
6017 case TemplateArgument::Pack:
6018 // FIXME: Is this right?
6019 return TemplateArgumentLocInfo();
6021 llvm_unreachable("unexpected template argument loc");
6025 ASTReader::ReadTemplateArgumentLoc(ModuleFile &F,
6026 const RecordData &Record, unsigned &Index) {
6027 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index);
6029 if (Arg.getKind() == TemplateArgument::Expression) {
6030 if (Record[Index++]) // bool InfoHasSameExpr.
6031 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
6033 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(),
6037 const ASTTemplateArgumentListInfo*
6038 ASTReader::ReadASTTemplateArgumentListInfo(ModuleFile &F,
6039 const RecordData &Record,
6041 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Index);
6042 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Index);
6043 unsigned NumArgsAsWritten = Record[Index++];
6044 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
6045 for (unsigned i = 0; i != NumArgsAsWritten; ++i)
6046 TemplArgsInfo.addArgument(ReadTemplateArgumentLoc(F, Record, Index));
6047 return ASTTemplateArgumentListInfo::Create(getContext(), TemplArgsInfo);
6050 Decl *ASTReader::GetExternalDecl(uint32_t ID) {
6054 void ASTReader::CompleteRedeclChain(const Decl *D) {
6055 if (NumCurrentElementsDeserializing) {
6056 // We arrange to not care about the complete redeclaration chain while we're
6057 // deserializing. Just remember that the AST has marked this one as complete
6058 // but that it's not actually complete yet, so we know we still need to
6059 // complete it later.
6060 PendingIncompleteDeclChains.push_back(const_cast<Decl*>(D));
6064 const DeclContext *DC = D->getDeclContext()->getRedeclContext();
6066 // If this is a named declaration, complete it by looking it up
6067 // within its context.
6069 // FIXME: We don't currently handle the cases where we can't do this;
6070 // merging a class definition that contains unnamed entities should merge
6071 // those entities. Likewise, merging a function definition should merge
6072 // all mergeable entities within it.
6073 if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC) ||
6074 isa<CXXRecordDecl>(DC) || isa<EnumDecl>(DC)) {
6075 if (DeclarationName Name = cast<NamedDecl>(D)->getDeclName()) {
6076 auto *II = Name.getAsIdentifierInfo();
6077 if (isa<TranslationUnitDecl>(DC) && II) {
6078 // Outside of C++, we don't have a lookup table for the TU, so update
6079 // the identifier instead. In C++, either way should work fine.
6080 if (II->isOutOfDate())
6081 updateOutOfDateIdentifier(*II);
6088 uint64_t ASTReader::readCXXBaseSpecifiers(ModuleFile &M,
6089 const RecordData &Record,
6091 if (Idx >= Record.size() || Record[Idx] > M.LocalNumCXXBaseSpecifiers) {
6092 Error("malformed AST file: missing C++ base specifier");
6096 unsigned LocalID = Record[Idx++];
6097 return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]);
6100 CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
6101 RecordLocation Loc = getLocalBitOffset(Offset);
6102 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
6103 SavedStreamPosition SavedPosition(Cursor);
6104 Cursor.JumpToBit(Loc.Offset);
6105 ReadingKindTracker ReadingKind(Read_Decl, *this);
6107 unsigned Code = Cursor.ReadCode();
6108 unsigned RecCode = Cursor.readRecord(Code, Record);
6109 if (RecCode != DECL_CXX_BASE_SPECIFIERS) {
6110 Error("malformed AST file: missing C++ base specifiers");
6115 unsigned NumBases = Record[Idx++];
6116 void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases);
6117 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases];
6118 for (unsigned I = 0; I != NumBases; ++I)
6119 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx);
6123 serialization::DeclID
6124 ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const {
6125 if (LocalID < NUM_PREDEF_DECL_IDS)
6128 ContinuousRangeMap<uint32_t, int, 2>::iterator I
6129 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS);
6130 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap");
6132 return LocalID + I->second;
6135 bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID,
6136 ModuleFile &M) const {
6137 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(ID);
6138 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
6139 return &M == I->second;
6142 ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) {
6143 if (!D->isFromASTFile())
6145 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(D->getGlobalID());
6146 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
6150 SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) {
6151 if (ID < NUM_PREDEF_DECL_IDS)
6152 return SourceLocation();
6154 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
6156 if (Index > DeclsLoaded.size()) {
6157 Error("declaration ID out-of-range for AST file");
6158 return SourceLocation();
6161 if (Decl *D = DeclsLoaded[Index])
6162 return D->getLocation();
6164 unsigned RawLocation = 0;
6165 RecordLocation Rec = DeclCursorForID(ID, RawLocation);
6166 return ReadSourceLocation(*Rec.F, RawLocation);
6169 Decl *ASTReader::GetExistingDecl(DeclID ID) {
6170 if (ID < NUM_PREDEF_DECL_IDS) {
6171 switch ((PredefinedDeclIDs)ID) {
6172 case PREDEF_DECL_NULL_ID:
6175 case PREDEF_DECL_TRANSLATION_UNIT_ID:
6176 return Context.getTranslationUnitDecl();
6178 case PREDEF_DECL_OBJC_ID_ID:
6179 return Context.getObjCIdDecl();
6181 case PREDEF_DECL_OBJC_SEL_ID:
6182 return Context.getObjCSelDecl();
6184 case PREDEF_DECL_OBJC_CLASS_ID:
6185 return Context.getObjCClassDecl();
6187 case PREDEF_DECL_OBJC_PROTOCOL_ID:
6188 return Context.getObjCProtocolDecl();
6190 case PREDEF_DECL_INT_128_ID:
6191 return Context.getInt128Decl();
6193 case PREDEF_DECL_UNSIGNED_INT_128_ID:
6194 return Context.getUInt128Decl();
6196 case PREDEF_DECL_OBJC_INSTANCETYPE_ID:
6197 return Context.getObjCInstanceTypeDecl();
6199 case PREDEF_DECL_BUILTIN_VA_LIST_ID:
6200 return Context.getBuiltinVaListDecl();
6204 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
6206 if (Index >= DeclsLoaded.size()) {
6207 assert(0 && "declaration ID out-of-range for AST file");
6208 Error("declaration ID out-of-range for AST file");
6212 return DeclsLoaded[Index];
6215 Decl *ASTReader::GetDecl(DeclID ID) {
6216 if (ID < NUM_PREDEF_DECL_IDS)
6217 return GetExistingDecl(ID);
6219 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
6221 if (Index >= DeclsLoaded.size()) {
6222 assert(0 && "declaration ID out-of-range for AST file");
6223 Error("declaration ID out-of-range for AST file");
6227 if (!DeclsLoaded[Index]) {
6229 if (DeserializationListener)
6230 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);
6233 return DeclsLoaded[Index];
6236 DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
6238 if (GlobalID < NUM_PREDEF_DECL_IDS)
6241 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(GlobalID);
6242 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
6243 ModuleFile *Owner = I->second;
6245 llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos
6246 = M.GlobalToLocalDeclIDs.find(Owner);
6247 if (Pos == M.GlobalToLocalDeclIDs.end())
6250 return GlobalID - Owner->BaseDeclID + Pos->second;
6253 serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F,
6254 const RecordData &Record,
6256 if (Idx >= Record.size()) {
6257 Error("Corrupted AST file");
6261 return getGlobalDeclID(F, Record[Idx++]);
6264 /// \brief Resolve the offset of a statement into a statement.
6266 /// This operation will read a new statement from the external
6267 /// source each time it is called, and is meant to be used via a
6268 /// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
6269 Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) {
6270 // Switch case IDs are per Decl.
6271 ClearSwitchCaseIDs();
6273 // Offset here is a global offset across the entire chain.
6274 RecordLocation Loc = getLocalBitOffset(Offset);
6275 Loc.F->DeclsCursor.JumpToBit(Loc.Offset);
6276 return ReadStmtFromStream(*Loc.F);
6280 class FindExternalLexicalDeclsVisitor {
6282 const DeclContext *DC;
6283 bool (*isKindWeWant)(Decl::Kind);
6285 SmallVectorImpl<Decl*> &Decls;
6286 bool PredefsVisited[NUM_PREDEF_DECL_IDS];
6289 FindExternalLexicalDeclsVisitor(ASTReader &Reader, const DeclContext *DC,
6290 bool (*isKindWeWant)(Decl::Kind),
6291 SmallVectorImpl<Decl*> &Decls)
6292 : Reader(Reader), DC(DC), isKindWeWant(isKindWeWant), Decls(Decls)
6294 for (unsigned I = 0; I != NUM_PREDEF_DECL_IDS; ++I)
6295 PredefsVisited[I] = false;
6298 static bool visit(ModuleFile &M, bool Preorder, void *UserData) {
6302 FindExternalLexicalDeclsVisitor *This
6303 = static_cast<FindExternalLexicalDeclsVisitor *>(UserData);
6305 ModuleFile::DeclContextInfosMap::iterator Info
6306 = M.DeclContextInfos.find(This->DC);
6307 if (Info == M.DeclContextInfos.end() || !Info->second.LexicalDecls)
6310 // Load all of the declaration IDs
6311 for (const KindDeclIDPair *ID = Info->second.LexicalDecls,
6312 *IDE = ID + Info->second.NumLexicalDecls;
6314 if (This->isKindWeWant && !This->isKindWeWant((Decl::Kind)ID->first))
6317 // Don't add predefined declarations to the lexical context more
6319 if (ID->second < NUM_PREDEF_DECL_IDS) {
6320 if (This->PredefsVisited[ID->second])
6323 This->PredefsVisited[ID->second] = true;
6326 if (Decl *D = This->Reader.GetLocalDecl(M, ID->second)) {
6327 if (!This->DC->isDeclInLexicalTraversal(D))
6328 This->Decls.push_back(D);
6337 ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC,
6338 bool (*isKindWeWant)(Decl::Kind),
6339 SmallVectorImpl<Decl*> &Decls) {
6340 // There might be lexical decls in multiple modules, for the TU at
6341 // least. Walk all of the modules in the order they were loaded.
6342 FindExternalLexicalDeclsVisitor Visitor(*this, DC, isKindWeWant, Decls);
6343 ModuleMgr.visitDepthFirst(&FindExternalLexicalDeclsVisitor::visit, &Visitor);
6344 ++NumLexicalDeclContextsRead;
6355 DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {}
6357 bool operator()(LocalDeclID L, LocalDeclID R) const {
6358 SourceLocation LHS = getLocation(L);
6359 SourceLocation RHS = getLocation(R);
6360 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
6363 bool operator()(SourceLocation LHS, LocalDeclID R) const {
6364 SourceLocation RHS = getLocation(R);
6365 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
6368 bool operator()(LocalDeclID L, SourceLocation RHS) const {
6369 SourceLocation LHS = getLocation(L);
6370 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
6373 SourceLocation getLocation(LocalDeclID ID) const {
6374 return Reader.getSourceManager().getFileLoc(
6375 Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID)));
6381 void ASTReader::FindFileRegionDecls(FileID File,
6382 unsigned Offset, unsigned Length,
6383 SmallVectorImpl<Decl *> &Decls) {
6384 SourceManager &SM = getSourceManager();
6386 llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File);
6387 if (I == FileDeclIDs.end())
6390 FileDeclsInfo &DInfo = I->second;
6391 if (DInfo.Decls.empty())
6395 BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset);
6396 SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length);
6398 DeclIDComp DIDComp(*this, *DInfo.Mod);
6399 ArrayRef<serialization::LocalDeclID>::iterator
6400 BeginIt = std::lower_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
6402 if (BeginIt != DInfo.Decls.begin())
6405 // If we are pointing at a top-level decl inside an objc container, we need
6406 // to backtrack until we find it otherwise we will fail to report that the
6407 // region overlaps with an objc container.
6408 while (BeginIt != DInfo.Decls.begin() &&
6409 GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt))
6410 ->isTopLevelDeclInObjCContainer())
6413 ArrayRef<serialization::LocalDeclID>::iterator
6414 EndIt = std::upper_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
6416 if (EndIt != DInfo.Decls.end())
6419 for (ArrayRef<serialization::LocalDeclID>::iterator
6420 DIt = BeginIt; DIt != EndIt; ++DIt)
6421 Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt)));
6425 /// \brief ModuleFile visitor used to perform name lookup into a
6426 /// declaration context.
6427 class DeclContextNameLookupVisitor {
6429 ArrayRef<const DeclContext *> Contexts;
6430 DeclarationName Name;
6431 SmallVectorImpl<NamedDecl *> &Decls;
6434 DeclContextNameLookupVisitor(ASTReader &Reader,
6435 ArrayRef<const DeclContext *> Contexts,
6436 DeclarationName Name,
6437 SmallVectorImpl<NamedDecl *> &Decls)
6438 : Reader(Reader), Contexts(Contexts), Name(Name), Decls(Decls) { }
6440 static bool visit(ModuleFile &M, void *UserData) {
6441 DeclContextNameLookupVisitor *This
6442 = static_cast<DeclContextNameLookupVisitor *>(UserData);
6444 // Check whether we have any visible declaration information for
6445 // this context in this module.
6446 ModuleFile::DeclContextInfosMap::iterator Info;
6447 bool FoundInfo = false;
6448 for (auto *DC : This->Contexts) {
6449 Info = M.DeclContextInfos.find(DC);
6450 if (Info != M.DeclContextInfos.end() &&
6451 Info->second.NameLookupTableData) {
6460 // Look for this name within this module.
6461 ASTDeclContextNameLookupTable *LookupTable =
6462 Info->second.NameLookupTableData;
6463 ASTDeclContextNameLookupTable::iterator Pos
6464 = LookupTable->find(This->Name);
6465 if (Pos == LookupTable->end())
6468 bool FoundAnything = false;
6469 ASTDeclContextNameLookupTrait::data_type Data = *Pos;
6470 for (; Data.first != Data.second; ++Data.first) {
6471 NamedDecl *ND = This->Reader.GetLocalDeclAs<NamedDecl>(M, *Data.first);
6475 if (ND->getDeclName() != This->Name) {
6476 // A name might be null because the decl's redeclarable part is
6477 // currently read before reading its name. The lookup is triggered by
6478 // building that decl (likely indirectly), and so it is later in the
6479 // sense of "already existing" and can be ignored here.
6480 // FIXME: This should not happen; deserializing declarations should
6481 // not perform lookups since that can lead to deserialization cycles.
6485 // Record this declaration.
6486 FoundAnything = true;
6487 This->Decls.push_back(ND);
6490 return FoundAnything;
6495 /// \brief Retrieve the "definitive" module file for the definition of the
6496 /// given declaration context, if there is one.
6498 /// The "definitive" module file is the only place where we need to look to
6499 /// find information about the declarations within the given declaration
6500 /// context. For example, C++ and Objective-C classes, C structs/unions, and
6501 /// Objective-C protocols, categories, and extensions are all defined in a
6502 /// single place in the source code, so they have definitive module files
6503 /// associated with them. C++ namespaces, on the other hand, can have
6504 /// definitions in multiple different module files.
6506 /// Note: this needs to be kept in sync with ASTWriter::AddedVisibleDecl's
6507 /// NDEBUG checking.
6508 static ModuleFile *getDefinitiveModuleFileFor(const DeclContext *DC,
6509 ASTReader &Reader) {
6510 if (const DeclContext *DefDC = getDefinitiveDeclContext(DC))
6511 return Reader.getOwningModuleFile(cast<Decl>(DefDC));
6517 ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
6518 DeclarationName Name) {
6519 assert(DC->hasExternalVisibleStorage() &&
6520 "DeclContext has no visible decls in storage");
6524 Deserializing LookupResults(this);
6526 SmallVector<NamedDecl *, 64> Decls;
6528 // Compute the declaration contexts we need to look into. Multiple such
6529 // declaration contexts occur when two declaration contexts from disjoint
6530 // modules get merged, e.g., when two namespaces with the same name are
6531 // independently defined in separate modules.
6532 SmallVector<const DeclContext *, 2> Contexts;
6533 Contexts.push_back(DC);
6535 if (DC->isNamespace()) {
6536 auto Merged = MergedDecls.find(const_cast<Decl *>(cast<Decl>(DC)));
6537 if (Merged != MergedDecls.end()) {
6538 for (unsigned I = 0, N = Merged->second.size(); I != N; ++I)
6539 Contexts.push_back(cast<DeclContext>(GetDecl(Merged->second[I])));
6543 auto LookUpInContexts = [&](ArrayRef<const DeclContext*> Contexts) {
6544 DeclContextNameLookupVisitor Visitor(*this, Contexts, Name, Decls);
6546 // If we can definitively determine which module file to look into,
6547 // only look there. Otherwise, look in all module files.
6548 ModuleFile *Definitive;
6549 if (Contexts.size() == 1 &&
6550 (Definitive = getDefinitiveModuleFileFor(Contexts[0], *this))) {
6551 DeclContextNameLookupVisitor::visit(*Definitive, &Visitor);
6553 ModuleMgr.visit(&DeclContextNameLookupVisitor::visit, &Visitor);
6557 LookUpInContexts(Contexts);
6559 // If this might be an implicit special member function, then also search
6560 // all merged definitions of the surrounding class. We need to search them
6561 // individually, because finding an entity in one of them doesn't imply that
6562 // we can't find a different entity in another one.
6563 if (isa<CXXRecordDecl>(DC)) {
6564 auto Kind = Name.getNameKind();
6565 if (Kind == DeclarationName::CXXConstructorName ||
6566 Kind == DeclarationName::CXXDestructorName ||
6567 (Kind == DeclarationName::CXXOperatorName &&
6568 Name.getCXXOverloadedOperator() == OO_Equal)) {
6569 auto Merged = MergedLookups.find(DC);
6570 if (Merged != MergedLookups.end())
6571 for (auto *MergedDC : Merged->second)
6572 LookUpInContexts(MergedDC);
6576 ++NumVisibleDeclContextsRead;
6577 SetExternalVisibleDeclsForName(DC, Name, Decls);
6578 return !Decls.empty();
6582 /// \brief ModuleFile visitor used to retrieve all visible names in a
6583 /// declaration context.
6584 class DeclContextAllNamesVisitor {
6586 SmallVectorImpl<const DeclContext *> &Contexts;
6591 DeclContextAllNamesVisitor(ASTReader &Reader,
6592 SmallVectorImpl<const DeclContext *> &Contexts,
6593 DeclsMap &Decls, bool VisitAll)
6594 : Reader(Reader), Contexts(Contexts), Decls(Decls), VisitAll(VisitAll) { }
6596 static bool visit(ModuleFile &M, void *UserData) {
6597 DeclContextAllNamesVisitor *This
6598 = static_cast<DeclContextAllNamesVisitor *>(UserData);
6600 // Check whether we have any visible declaration information for
6601 // this context in this module.
6602 ModuleFile::DeclContextInfosMap::iterator Info;
6603 bool FoundInfo = false;
6604 for (unsigned I = 0, N = This->Contexts.size(); I != N; ++I) {
6605 Info = M.DeclContextInfos.find(This->Contexts[I]);
6606 if (Info != M.DeclContextInfos.end() &&
6607 Info->second.NameLookupTableData) {
6616 ASTDeclContextNameLookupTable *LookupTable =
6617 Info->second.NameLookupTableData;
6618 bool FoundAnything = false;
6619 for (ASTDeclContextNameLookupTable::data_iterator
6620 I = LookupTable->data_begin(), E = LookupTable->data_end();
6623 ASTDeclContextNameLookupTrait::data_type Data = *I;
6624 for (; Data.first != Data.second; ++Data.first) {
6625 NamedDecl *ND = This->Reader.GetLocalDeclAs<NamedDecl>(M,
6630 // Record this declaration.
6631 FoundAnything = true;
6632 This->Decls[ND->getDeclName()].push_back(ND);
6636 return FoundAnything && !This->VisitAll;
6641 void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) {
6642 if (!DC->hasExternalVisibleStorage())
6646 // Compute the declaration contexts we need to look into. Multiple such
6647 // declaration contexts occur when two declaration contexts from disjoint
6648 // modules get merged, e.g., when two namespaces with the same name are
6649 // independently defined in separate modules.
6650 SmallVector<const DeclContext *, 2> Contexts;
6651 Contexts.push_back(DC);
6653 if (DC->isNamespace()) {
6654 MergedDeclsMap::iterator Merged
6655 = MergedDecls.find(const_cast<Decl *>(cast<Decl>(DC)));
6656 if (Merged != MergedDecls.end()) {
6657 for (unsigned I = 0, N = Merged->second.size(); I != N; ++I)
6658 Contexts.push_back(cast<DeclContext>(GetDecl(Merged->second[I])));
6662 DeclContextAllNamesVisitor Visitor(*this, Contexts, Decls,
6663 /*VisitAll=*/DC->isFileContext());
6664 ModuleMgr.visit(&DeclContextAllNamesVisitor::visit, &Visitor);
6665 ++NumVisibleDeclContextsRead;
6667 for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
6668 SetExternalVisibleDeclsForName(DC, I->first, I->second);
6670 const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false);
6673 /// \brief Under non-PCH compilation the consumer receives the objc methods
6674 /// before receiving the implementation, and codegen depends on this.
6675 /// We simulate this by deserializing and passing to consumer the methods of the
6676 /// implementation before passing the deserialized implementation decl.
6677 static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD,
6678 ASTConsumer *Consumer) {
6679 assert(ImplD && Consumer);
6681 for (auto *I : ImplD->methods())
6682 Consumer->HandleInterestingDecl(DeclGroupRef(I));
6684 Consumer->HandleInterestingDecl(DeclGroupRef(ImplD));
6687 void ASTReader::PassInterestingDeclsToConsumer() {
6690 if (PassingDeclsToConsumer)
6693 // Guard variable to avoid recursively redoing the process of passing
6694 // decls to consumer.
6695 SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer,
6698 while (!InterestingDecls.empty()) {
6699 Decl *D = InterestingDecls.front();
6700 InterestingDecls.pop_front();
6702 PassInterestingDeclToConsumer(D);
6706 void ASTReader::PassInterestingDeclToConsumer(Decl *D) {
6707 if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D))
6708 PassObjCImplDeclToConsumer(ImplD, Consumer);
6710 Consumer->HandleInterestingDecl(DeclGroupRef(D));
6713 void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) {
6714 this->Consumer = Consumer;
6719 for (unsigned I = 0, N = EagerlyDeserializedDecls.size(); I != N; ++I) {
6720 // Force deserialization of this decl, which will cause it to be queued for
6721 // passing to the consumer.
6722 GetDecl(EagerlyDeserializedDecls[I]);
6724 EagerlyDeserializedDecls.clear();
6726 PassInterestingDeclsToConsumer();
6729 void ASTReader::PrintStats() {
6730 std::fprintf(stderr, "*** AST File Statistics:\n");
6732 unsigned NumTypesLoaded
6733 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
6735 unsigned NumDeclsLoaded
6736 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
6738 unsigned NumIdentifiersLoaded
6739 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
6740 IdentifiersLoaded.end(),
6741 (IdentifierInfo *)nullptr);
6742 unsigned NumMacrosLoaded
6743 = MacrosLoaded.size() - std::count(MacrosLoaded.begin(),
6745 (MacroInfo *)nullptr);
6746 unsigned NumSelectorsLoaded
6747 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
6748 SelectorsLoaded.end(),
6751 if (unsigned TotalNumSLocEntries = getTotalNumSLocs())
6752 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n",
6753 NumSLocEntriesRead, TotalNumSLocEntries,
6754 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
6755 if (!TypesLoaded.empty())
6756 std::fprintf(stderr, " %u/%u types read (%f%%)\n",
6757 NumTypesLoaded, (unsigned)TypesLoaded.size(),
6758 ((float)NumTypesLoaded/TypesLoaded.size() * 100));
6759 if (!DeclsLoaded.empty())
6760 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n",
6761 NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
6762 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
6763 if (!IdentifiersLoaded.empty())
6764 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n",
6765 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
6766 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
6767 if (!MacrosLoaded.empty())
6768 std::fprintf(stderr, " %u/%u macros read (%f%%)\n",
6769 NumMacrosLoaded, (unsigned)MacrosLoaded.size(),
6770 ((float)NumMacrosLoaded/MacrosLoaded.size() * 100));
6771 if (!SelectorsLoaded.empty())
6772 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n",
6773 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
6774 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
6775 if (TotalNumStatements)
6776 std::fprintf(stderr, " %u/%u statements read (%f%%)\n",
6777 NumStatementsRead, TotalNumStatements,
6778 ((float)NumStatementsRead/TotalNumStatements * 100));
6780 std::fprintf(stderr, " %u/%u macros read (%f%%)\n",
6781 NumMacrosRead, TotalNumMacros,
6782 ((float)NumMacrosRead/TotalNumMacros * 100));
6783 if (TotalLexicalDeclContexts)
6784 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n",
6785 NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
6786 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
6788 if (TotalVisibleDeclContexts)
6789 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n",
6790 NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
6791 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
6793 if (TotalNumMethodPoolEntries) {
6794 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n",
6795 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
6796 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
6799 if (NumMethodPoolLookups) {
6800 std::fprintf(stderr, " %u/%u method pool lookups succeeded (%f%%)\n",
6801 NumMethodPoolHits, NumMethodPoolLookups,
6802 ((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0));
6804 if (NumMethodPoolTableLookups) {
6805 std::fprintf(stderr, " %u/%u method pool table lookups succeeded (%f%%)\n",
6806 NumMethodPoolTableHits, NumMethodPoolTableLookups,
6807 ((float)NumMethodPoolTableHits/NumMethodPoolTableLookups
6811 if (NumIdentifierLookupHits) {
6812 std::fprintf(stderr,
6813 " %u / %u identifier table lookups succeeded (%f%%)\n",
6814 NumIdentifierLookupHits, NumIdentifierLookups,
6815 (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
6819 std::fprintf(stderr, "\n");
6820 GlobalIndex->printStats();
6823 std::fprintf(stderr, "\n");
6825 std::fprintf(stderr, "\n");
6828 template<typename Key, typename ModuleFile, unsigned InitialCapacity>
6830 dumpModuleIDMap(StringRef Name,
6831 const ContinuousRangeMap<Key, ModuleFile *,
6832 InitialCapacity> &Map) {
6833 if (Map.begin() == Map.end())
6836 typedef ContinuousRangeMap<Key, ModuleFile *, InitialCapacity> MapType;
6837 llvm::errs() << Name << ":\n";
6838 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
6840 llvm::errs() << " " << I->first << " -> " << I->second->FileName
6845 void ASTReader::dump() {
6846 llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
6847 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap);
6848 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap);
6849 dumpModuleIDMap("Global type map", GlobalTypeMap);
6850 dumpModuleIDMap("Global declaration map", GlobalDeclMap);
6851 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap);
6852 dumpModuleIDMap("Global macro map", GlobalMacroMap);
6853 dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap);
6854 dumpModuleIDMap("Global selector map", GlobalSelectorMap);
6855 dumpModuleIDMap("Global preprocessed entity map",
6856 GlobalPreprocessedEntityMap);
6858 llvm::errs() << "\n*** PCH/Modules Loaded:";
6859 for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(),
6860 MEnd = ModuleMgr.end();
6865 /// Return the amount of memory used by memory buffers, breaking down
6866 /// by heap-backed versus mmap'ed memory.
6867 void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
6868 for (ModuleConstIterator I = ModuleMgr.begin(),
6869 E = ModuleMgr.end(); I != E; ++I) {
6870 if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) {
6871 size_t bytes = buf->getBufferSize();
6872 switch (buf->getBufferKind()) {
6873 case llvm::MemoryBuffer::MemoryBuffer_Malloc:
6874 sizes.malloc_bytes += bytes;
6876 case llvm::MemoryBuffer::MemoryBuffer_MMap:
6877 sizes.mmap_bytes += bytes;
6884 void ASTReader::InitializeSema(Sema &S) {
6886 S.addExternalSource(this);
6888 // Makes sure any declarations that were deserialized "too early"
6889 // still get added to the identifier's declaration chains.
6890 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) {
6891 pushExternalDeclIntoScope(PreloadedDecls[I],
6892 PreloadedDecls[I]->getDeclName());
6894 PreloadedDecls.clear();
6896 // FIXME: What happens if these are changed by a module import?
6897 if (!FPPragmaOptions.empty()) {
6898 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS");
6899 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0];
6902 // FIXME: What happens if these are changed by a module import?
6903 if (!OpenCLExtensions.empty()) {
6905 #define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++];
6906 #include "clang/Basic/OpenCLExtensions.def"
6908 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS");
6914 void ASTReader::UpdateSema() {
6915 assert(SemaObj && "no Sema to update");
6917 // Load the offsets of the declarations that Sema references.
6918 // They will be lazily deserialized when needed.
6919 if (!SemaDeclRefs.empty()) {
6920 assert(SemaDeclRefs.size() % 2 == 0);
6921 for (unsigned I = 0; I != SemaDeclRefs.size(); I += 2) {
6922 if (!SemaObj->StdNamespace)
6923 SemaObj->StdNamespace = SemaDeclRefs[I];
6924 if (!SemaObj->StdBadAlloc)
6925 SemaObj->StdBadAlloc = SemaDeclRefs[I+1];
6927 SemaDeclRefs.clear();
6930 // Update the state of 'pragma clang optimize'. Use the same API as if we had
6931 // encountered the pragma in the source.
6932 if(OptimizeOffPragmaLocation.isValid())
6933 SemaObj->ActOnPragmaOptimize(/* IsOn = */ false, OptimizeOffPragmaLocation);
6936 IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) {
6937 // Note that we are loading an identifier.
6938 Deserializing AnIdentifier(this);
6939 StringRef Name(NameStart, NameEnd - NameStart);
6941 // If there is a global index, look there first to determine which modules
6942 // provably do not have any results for this identifier.
6943 GlobalModuleIndex::HitSet Hits;
6944 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
6945 if (!loadGlobalIndex()) {
6946 if (GlobalIndex->lookupIdentifier(Name, Hits)) {
6950 IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
6951 NumIdentifierLookups,
6952 NumIdentifierLookupHits);
6953 ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor, HitsPtr);
6954 IdentifierInfo *II = Visitor.getIdentifierInfo();
6955 markIdentifierUpToDate(II);
6960 /// \brief An identifier-lookup iterator that enumerates all of the
6961 /// identifiers stored within a set of AST files.
6962 class ASTIdentifierIterator : public IdentifierIterator {
6963 /// \brief The AST reader whose identifiers are being enumerated.
6964 const ASTReader &Reader;
6966 /// \brief The current index into the chain of AST files stored in
6970 /// \brief The current position within the identifier lookup table
6971 /// of the current AST file.
6972 ASTIdentifierLookupTable::key_iterator Current;
6974 /// \brief The end position within the identifier lookup table of
6975 /// the current AST file.
6976 ASTIdentifierLookupTable::key_iterator End;
6979 explicit ASTIdentifierIterator(const ASTReader &Reader);
6981 StringRef Next() override;
6985 ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader)
6986 : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) {
6987 ASTIdentifierLookupTable *IdTable
6988 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable;
6989 Current = IdTable->key_begin();
6990 End = IdTable->key_end();
6993 StringRef ASTIdentifierIterator::Next() {
6994 while (Current == End) {
6995 // If we have exhausted all of our AST files, we're done.
7000 ASTIdentifierLookupTable *IdTable
7001 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].
7002 IdentifierLookupTable;
7003 Current = IdTable->key_begin();
7004 End = IdTable->key_end();
7007 // We have any identifiers remaining in the current AST file; return
7009 StringRef Result = *Current;
7014 IdentifierIterator *ASTReader::getIdentifiers() {
7015 if (!loadGlobalIndex())
7016 return GlobalIndex->createIdentifierIterator();
7018 return new ASTIdentifierIterator(*this);
7021 namespace clang { namespace serialization {
7022 class ReadMethodPoolVisitor {
7025 unsigned PriorGeneration;
7026 unsigned InstanceBits;
7027 unsigned FactoryBits;
7028 SmallVector<ObjCMethodDecl *, 4> InstanceMethods;
7029 SmallVector<ObjCMethodDecl *, 4> FactoryMethods;
7032 ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel,
7033 unsigned PriorGeneration)
7034 : Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration),
7035 InstanceBits(0), FactoryBits(0) { }
7037 static bool visit(ModuleFile &M, void *UserData) {
7038 ReadMethodPoolVisitor *This
7039 = static_cast<ReadMethodPoolVisitor *>(UserData);
7041 if (!M.SelectorLookupTable)
7044 // If we've already searched this module file, skip it now.
7045 if (M.Generation <= This->PriorGeneration)
7048 ++This->Reader.NumMethodPoolTableLookups;
7049 ASTSelectorLookupTable *PoolTable
7050 = (ASTSelectorLookupTable*)M.SelectorLookupTable;
7051 ASTSelectorLookupTable::iterator Pos = PoolTable->find(This->Sel);
7052 if (Pos == PoolTable->end())
7055 ++This->Reader.NumMethodPoolTableHits;
7056 ++This->Reader.NumSelectorsRead;
7057 // FIXME: Not quite happy with the statistics here. We probably should
7058 // disable this tracking when called via LoadSelector.
7059 // Also, should entries without methods count as misses?
7060 ++This->Reader.NumMethodPoolEntriesRead;
7061 ASTSelectorLookupTrait::data_type Data = *Pos;
7062 if (This->Reader.DeserializationListener)
7063 This->Reader.DeserializationListener->SelectorRead(Data.ID,
7066 This->InstanceMethods.append(Data.Instance.begin(), Data.Instance.end());
7067 This->FactoryMethods.append(Data.Factory.begin(), Data.Factory.end());
7068 This->InstanceBits = Data.InstanceBits;
7069 This->FactoryBits = Data.FactoryBits;
7073 /// \brief Retrieve the instance methods found by this visitor.
7074 ArrayRef<ObjCMethodDecl *> getInstanceMethods() const {
7075 return InstanceMethods;
7078 /// \brief Retrieve the instance methods found by this visitor.
7079 ArrayRef<ObjCMethodDecl *> getFactoryMethods() const {
7080 return FactoryMethods;
7083 unsigned getInstanceBits() const { return InstanceBits; }
7084 unsigned getFactoryBits() const { return FactoryBits; }
7086 } } // end namespace clang::serialization
7088 /// \brief Add the given set of methods to the method list.
7089 static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods,
7090 ObjCMethodList &List) {
7091 for (unsigned I = 0, N = Methods.size(); I != N; ++I) {
7092 S.addMethodToGlobalList(&List, Methods[I]);
7096 void ASTReader::ReadMethodPool(Selector Sel) {
7097 // Get the selector generation and update it to the current generation.
7098 unsigned &Generation = SelectorGeneration[Sel];
7099 unsigned PriorGeneration = Generation;
7100 Generation = getGeneration();
7102 // Search for methods defined with this selector.
7103 ++NumMethodPoolLookups;
7104 ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration);
7105 ModuleMgr.visit(&ReadMethodPoolVisitor::visit, &Visitor);
7107 if (Visitor.getInstanceMethods().empty() &&
7108 Visitor.getFactoryMethods().empty())
7111 ++NumMethodPoolHits;
7116 Sema &S = *getSema();
7117 Sema::GlobalMethodPool::iterator Pos
7118 = S.MethodPool.insert(std::make_pair(Sel, Sema::GlobalMethods())).first;
7120 addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first);
7121 addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second);
7122 Pos->second.first.setBits(Visitor.getInstanceBits());
7123 Pos->second.second.setBits(Visitor.getFactoryBits());
7126 void ASTReader::ReadKnownNamespaces(
7127 SmallVectorImpl<NamespaceDecl *> &Namespaces) {
7130 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) {
7131 if (NamespaceDecl *Namespace
7132 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I])))
7133 Namespaces.push_back(Namespace);
7137 void ASTReader::ReadUndefinedButUsed(
7138 llvm::DenseMap<NamedDecl*, SourceLocation> &Undefined) {
7139 for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) {
7140 NamedDecl *D = cast<NamedDecl>(GetDecl(UndefinedButUsed[Idx++]));
7141 SourceLocation Loc =
7142 SourceLocation::getFromRawEncoding(UndefinedButUsed[Idx++]);
7143 Undefined.insert(std::make_pair(D, Loc));
7147 void ASTReader::ReadTentativeDefinitions(
7148 SmallVectorImpl<VarDecl *> &TentativeDefs) {
7149 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
7150 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I]));
7152 TentativeDefs.push_back(Var);
7154 TentativeDefinitions.clear();
7157 void ASTReader::ReadUnusedFileScopedDecls(
7158 SmallVectorImpl<const DeclaratorDecl *> &Decls) {
7159 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
7161 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I]));
7165 UnusedFileScopedDecls.clear();
7168 void ASTReader::ReadDelegatingConstructors(
7169 SmallVectorImpl<CXXConstructorDecl *> &Decls) {
7170 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) {
7171 CXXConstructorDecl *D
7172 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I]));
7176 DelegatingCtorDecls.clear();
7179 void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) {
7180 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) {
7182 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I]));
7186 ExtVectorDecls.clear();
7189 void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) {
7190 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) {
7192 = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I]));
7196 DynamicClasses.clear();
7200 ASTReader::ReadLocallyScopedExternCDecls(SmallVectorImpl<NamedDecl *> &Decls) {
7201 for (unsigned I = 0, N = LocallyScopedExternCDecls.size(); I != N; ++I) {
7203 = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternCDecls[I]));
7207 LocallyScopedExternCDecls.clear();
7210 void ASTReader::ReadReferencedSelectors(
7211 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) {
7212 if (ReferencedSelectorsData.empty())
7215 // If there are @selector references added them to its pool. This is for
7216 // implementation of -Wselector.
7217 unsigned int DataSize = ReferencedSelectorsData.size()-1;
7219 while (I < DataSize) {
7220 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]);
7221 SourceLocation SelLoc
7222 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]);
7223 Sels.push_back(std::make_pair(Sel, SelLoc));
7225 ReferencedSelectorsData.clear();
7228 void ASTReader::ReadWeakUndeclaredIdentifiers(
7229 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) {
7230 if (WeakUndeclaredIdentifiers.empty())
7233 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) {
7234 IdentifierInfo *WeakId
7235 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
7236 IdentifierInfo *AliasId
7237 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
7239 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]);
7240 bool Used = WeakUndeclaredIdentifiers[I++];
7241 WeakInfo WI(AliasId, Loc);
7243 WeakIDs.push_back(std::make_pair(WeakId, WI));
7245 WeakUndeclaredIdentifiers.clear();
7248 void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) {
7249 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) {
7250 ExternalVTableUse VT;
7251 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
7252 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]);
7253 VT.DefinitionRequired = VTableUses[Idx++];
7254 VTables.push_back(VT);
7260 void ASTReader::ReadPendingInstantiations(
7261 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) {
7262 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) {
7263 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++]));
7265 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]);
7267 Pending.push_back(std::make_pair(D, Loc));
7269 PendingInstantiations.clear();
7272 void ASTReader::ReadLateParsedTemplates(
7273 llvm::DenseMap<const FunctionDecl *, LateParsedTemplate *> &LPTMap) {
7274 for (unsigned Idx = 0, N = LateParsedTemplates.size(); Idx < N;
7276 FunctionDecl *FD = cast<FunctionDecl>(GetDecl(LateParsedTemplates[Idx++]));
7278 LateParsedTemplate *LT = new LateParsedTemplate;
7279 LT->D = GetDecl(LateParsedTemplates[Idx++]);
7281 ModuleFile *F = getOwningModuleFile(LT->D);
7282 assert(F && "No module");
7284 unsigned TokN = LateParsedTemplates[Idx++];
7285 LT->Toks.reserve(TokN);
7286 for (unsigned T = 0; T < TokN; ++T)
7287 LT->Toks.push_back(ReadToken(*F, LateParsedTemplates, Idx));
7292 LateParsedTemplates.clear();
7295 void ASTReader::LoadSelector(Selector Sel) {
7296 // It would be complicated to avoid reading the methods anyway. So don't.
7297 ReadMethodPool(Sel);
7300 void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) {
7301 assert(ID && "Non-zero identifier ID required");
7302 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range");
7303 IdentifiersLoaded[ID - 1] = II;
7304 if (DeserializationListener)
7305 DeserializationListener->IdentifierRead(ID, II);
7308 /// \brief Set the globally-visible declarations associated with the given
7311 /// If the AST reader is currently in a state where the given declaration IDs
7312 /// cannot safely be resolved, they are queued until it is safe to resolve
7315 /// \param II an IdentifierInfo that refers to one or more globally-visible
7318 /// \param DeclIDs the set of declaration IDs with the name @p II that are
7319 /// visible at global scope.
7321 /// \param Decls if non-null, this vector will be populated with the set of
7322 /// deserialized declarations. These declarations will not be pushed into
7325 ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II,
7326 const SmallVectorImpl<uint32_t> &DeclIDs,
7327 SmallVectorImpl<Decl *> *Decls) {
7328 if (NumCurrentElementsDeserializing && !Decls) {
7329 PendingIdentifierInfos[II].append(DeclIDs.begin(), DeclIDs.end());
7333 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
7334 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));
7336 // If we're simply supposed to record the declarations, do so now.
7338 Decls->push_back(D);
7342 // Introduce this declaration into the translation-unit scope
7343 // and add it to the declaration chain for this identifier, so
7344 // that (unqualified) name lookup will find it.
7345 pushExternalDeclIntoScope(D, II);
7347 // Queue this declaration so that it will be added to the
7348 // translation unit scope and identifier's declaration chain
7349 // once a Sema object is known.
7350 PreloadedDecls.push_back(D);
7355 IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) {
7359 if (IdentifiersLoaded.empty()) {
7360 Error("no identifier table in AST file");
7365 if (!IdentifiersLoaded[ID]) {
7366 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1);
7367 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map");
7368 ModuleFile *M = I->second;
7369 unsigned Index = ID - M->BaseIdentifierID;
7370 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index];
7372 // All of the strings in the AST file are preceded by a 16-bit length.
7373 // Extract that 16-bit length to avoid having to execute strlen().
7374 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as
7375 // unsigned integers. This is important to avoid integer overflow when
7376 // we cast them to 'unsigned'.
7377 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2;
7378 unsigned StrLen = (((unsigned) StrLenPtr[0])
7379 | (((unsigned) StrLenPtr[1]) << 8)) - 1;
7380 IdentifiersLoaded[ID]
7381 = &PP.getIdentifierTable().get(StringRef(Str, StrLen));
7382 if (DeserializationListener)
7383 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]);
7386 return IdentifiersLoaded[ID];
7389 IdentifierInfo *ASTReader::getLocalIdentifier(ModuleFile &M, unsigned LocalID) {
7390 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID));
7393 IdentifierID ASTReader::getGlobalIdentifierID(ModuleFile &M, unsigned LocalID) {
7394 if (LocalID < NUM_PREDEF_IDENT_IDS)
7397 ContinuousRangeMap<uint32_t, int, 2>::iterator I
7398 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS);
7399 assert(I != M.IdentifierRemap.end()
7400 && "Invalid index into identifier index remap");
7402 return LocalID + I->second;
7405 MacroInfo *ASTReader::getMacro(MacroID ID) {
7409 if (MacrosLoaded.empty()) {
7410 Error("no macro table in AST file");
7414 ID -= NUM_PREDEF_MACRO_IDS;
7415 if (!MacrosLoaded[ID]) {
7416 GlobalMacroMapType::iterator I
7417 = GlobalMacroMap.find(ID + NUM_PREDEF_MACRO_IDS);
7418 assert(I != GlobalMacroMap.end() && "Corrupted global macro map");
7419 ModuleFile *M = I->second;
7420 unsigned Index = ID - M->BaseMacroID;
7421 MacrosLoaded[ID] = ReadMacroRecord(*M, M->MacroOffsets[Index]);
7423 if (DeserializationListener)
7424 DeserializationListener->MacroRead(ID + NUM_PREDEF_MACRO_IDS,
7428 return MacrosLoaded[ID];
7431 MacroID ASTReader::getGlobalMacroID(ModuleFile &M, unsigned LocalID) {
7432 if (LocalID < NUM_PREDEF_MACRO_IDS)
7435 ContinuousRangeMap<uint32_t, int, 2>::iterator I
7436 = M.MacroRemap.find(LocalID - NUM_PREDEF_MACRO_IDS);
7437 assert(I != M.MacroRemap.end() && "Invalid index into macro index remap");
7439 return LocalID + I->second;
7442 serialization::SubmoduleID
7443 ASTReader::getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID) {
7444 if (LocalID < NUM_PREDEF_SUBMODULE_IDS)
7447 ContinuousRangeMap<uint32_t, int, 2>::iterator I
7448 = M.SubmoduleRemap.find(LocalID - NUM_PREDEF_SUBMODULE_IDS);
7449 assert(I != M.SubmoduleRemap.end()
7450 && "Invalid index into submodule index remap");
7452 return LocalID + I->second;
7455 Module *ASTReader::getSubmodule(SubmoduleID GlobalID) {
7456 if (GlobalID < NUM_PREDEF_SUBMODULE_IDS) {
7457 assert(GlobalID == 0 && "Unhandled global submodule ID");
7461 if (GlobalID > SubmodulesLoaded.size()) {
7462 Error("submodule ID out of range in AST file");
7466 return SubmodulesLoaded[GlobalID - NUM_PREDEF_SUBMODULE_IDS];
7469 Module *ASTReader::getModule(unsigned ID) {
7470 return getSubmodule(ID);
7473 Selector ASTReader::getLocalSelector(ModuleFile &M, unsigned LocalID) {
7474 return DecodeSelector(getGlobalSelectorID(M, LocalID));
7477 Selector ASTReader::DecodeSelector(serialization::SelectorID ID) {
7481 if (ID > SelectorsLoaded.size()) {
7482 Error("selector ID out of range in AST file");
7486 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == nullptr) {
7487 // Load this selector from the selector table.
7488 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID);
7489 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map");
7490 ModuleFile &M = *I->second;
7491 ASTSelectorLookupTrait Trait(*this, M);
7492 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS;
7493 SelectorsLoaded[ID - 1] =
7494 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0);
7495 if (DeserializationListener)
7496 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]);
7499 return SelectorsLoaded[ID - 1];
7502 Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) {
7503 return DecodeSelector(ID);
7506 uint32_t ASTReader::GetNumExternalSelectors() {
7507 // ID 0 (the null selector) is considered an external selector.
7508 return getTotalNumSelectors() + 1;
7511 serialization::SelectorID
7512 ASTReader::getGlobalSelectorID(ModuleFile &M, unsigned LocalID) const {
7513 if (LocalID < NUM_PREDEF_SELECTOR_IDS)
7516 ContinuousRangeMap<uint32_t, int, 2>::iterator I
7517 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS);
7518 assert(I != M.SelectorRemap.end()
7519 && "Invalid index into selector index remap");
7521 return LocalID + I->second;
7525 ASTReader::ReadDeclarationName(ModuleFile &F,
7526 const RecordData &Record, unsigned &Idx) {
7527 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++];
7529 case DeclarationName::Identifier:
7530 return DeclarationName(GetIdentifierInfo(F, Record, Idx));
7532 case DeclarationName::ObjCZeroArgSelector:
7533 case DeclarationName::ObjCOneArgSelector:
7534 case DeclarationName::ObjCMultiArgSelector:
7535 return DeclarationName(ReadSelector(F, Record, Idx));
7537 case DeclarationName::CXXConstructorName:
7538 return Context.DeclarationNames.getCXXConstructorName(
7539 Context.getCanonicalType(readType(F, Record, Idx)));
7541 case DeclarationName::CXXDestructorName:
7542 return Context.DeclarationNames.getCXXDestructorName(
7543 Context.getCanonicalType(readType(F, Record, Idx)));
7545 case DeclarationName::CXXConversionFunctionName:
7546 return Context.DeclarationNames.getCXXConversionFunctionName(
7547 Context.getCanonicalType(readType(F, Record, Idx)));
7549 case DeclarationName::CXXOperatorName:
7550 return Context.DeclarationNames.getCXXOperatorName(
7551 (OverloadedOperatorKind)Record[Idx++]);
7553 case DeclarationName::CXXLiteralOperatorName:
7554 return Context.DeclarationNames.getCXXLiteralOperatorName(
7555 GetIdentifierInfo(F, Record, Idx));
7557 case DeclarationName::CXXUsingDirective:
7558 return DeclarationName::getUsingDirectiveName();
7561 llvm_unreachable("Invalid NameKind!");
7564 void ASTReader::ReadDeclarationNameLoc(ModuleFile &F,
7565 DeclarationNameLoc &DNLoc,
7566 DeclarationName Name,
7567 const RecordData &Record, unsigned &Idx) {
7568 switch (Name.getNameKind()) {
7569 case DeclarationName::CXXConstructorName:
7570 case DeclarationName::CXXDestructorName:
7571 case DeclarationName::CXXConversionFunctionName:
7572 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx);
7575 case DeclarationName::CXXOperatorName:
7576 DNLoc.CXXOperatorName.BeginOpNameLoc
7577 = ReadSourceLocation(F, Record, Idx).getRawEncoding();
7578 DNLoc.CXXOperatorName.EndOpNameLoc
7579 = ReadSourceLocation(F, Record, Idx).getRawEncoding();
7582 case DeclarationName::CXXLiteralOperatorName:
7583 DNLoc.CXXLiteralOperatorName.OpNameLoc
7584 = ReadSourceLocation(F, Record, Idx).getRawEncoding();
7587 case DeclarationName::Identifier:
7588 case DeclarationName::ObjCZeroArgSelector:
7589 case DeclarationName::ObjCOneArgSelector:
7590 case DeclarationName::ObjCMultiArgSelector:
7591 case DeclarationName::CXXUsingDirective:
7596 void ASTReader::ReadDeclarationNameInfo(ModuleFile &F,
7597 DeclarationNameInfo &NameInfo,
7598 const RecordData &Record, unsigned &Idx) {
7599 NameInfo.setName(ReadDeclarationName(F, Record, Idx));
7600 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx));
7601 DeclarationNameLoc DNLoc;
7602 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx);
7603 NameInfo.setInfo(DNLoc);
7606 void ASTReader::ReadQualifierInfo(ModuleFile &F, QualifierInfo &Info,
7607 const RecordData &Record, unsigned &Idx) {
7608 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx);
7609 unsigned NumTPLists = Record[Idx++];
7610 Info.NumTemplParamLists = NumTPLists;
7612 Info.TemplParamLists = new (Context) TemplateParameterList*[NumTPLists];
7613 for (unsigned i=0; i != NumTPLists; ++i)
7614 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx);
7619 ASTReader::ReadTemplateName(ModuleFile &F, const RecordData &Record,
7621 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++];
7623 case TemplateName::Template:
7624 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx));
7626 case TemplateName::OverloadedTemplate: {
7627 unsigned size = Record[Idx++];
7628 UnresolvedSet<8> Decls;
7630 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx));
7632 return Context.getOverloadedTemplateName(Decls.begin(), Decls.end());
7635 case TemplateName::QualifiedTemplate: {
7636 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx);
7637 bool hasTemplKeyword = Record[Idx++];
7638 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx);
7639 return Context.getQualifiedTemplateName(NNS, hasTemplKeyword, Template);
7642 case TemplateName::DependentTemplate: {
7643 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx);
7644 if (Record[Idx++]) // isIdentifier
7645 return Context.getDependentTemplateName(NNS,
7646 GetIdentifierInfo(F, Record,
7648 return Context.getDependentTemplateName(NNS,
7649 (OverloadedOperatorKind)Record[Idx++]);
7652 case TemplateName::SubstTemplateTemplateParm: {
7653 TemplateTemplateParmDecl *param
7654 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx);
7655 if (!param) return TemplateName();
7656 TemplateName replacement = ReadTemplateName(F, Record, Idx);
7657 return Context.getSubstTemplateTemplateParm(param, replacement);
7660 case TemplateName::SubstTemplateTemplateParmPack: {
7661 TemplateTemplateParmDecl *Param
7662 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx);
7664 return TemplateName();
7666 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx);
7667 if (ArgPack.getKind() != TemplateArgument::Pack)
7668 return TemplateName();
7670 return Context.getSubstTemplateTemplateParmPack(Param, ArgPack);
7674 llvm_unreachable("Unhandled template name kind!");
7678 ASTReader::ReadTemplateArgument(ModuleFile &F,
7679 const RecordData &Record, unsigned &Idx) {
7680 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++];
7682 case TemplateArgument::Null:
7683 return TemplateArgument();
7684 case TemplateArgument::Type:
7685 return TemplateArgument(readType(F, Record, Idx));
7686 case TemplateArgument::Declaration: {
7687 ValueDecl *D = ReadDeclAs<ValueDecl>(F, Record, Idx);
7688 bool ForReferenceParam = Record[Idx++];
7689 return TemplateArgument(D, ForReferenceParam);
7691 case TemplateArgument::NullPtr:
7692 return TemplateArgument(readType(F, Record, Idx), /*isNullPtr*/true);
7693 case TemplateArgument::Integral: {
7694 llvm::APSInt Value = ReadAPSInt(Record, Idx);
7695 QualType T = readType(F, Record, Idx);
7696 return TemplateArgument(Context, Value, T);
7698 case TemplateArgument::Template:
7699 return TemplateArgument(ReadTemplateName(F, Record, Idx));
7700 case TemplateArgument::TemplateExpansion: {
7701 TemplateName Name = ReadTemplateName(F, Record, Idx);
7702 Optional<unsigned> NumTemplateExpansions;
7703 if (unsigned NumExpansions = Record[Idx++])
7704 NumTemplateExpansions = NumExpansions - 1;
7705 return TemplateArgument(Name, NumTemplateExpansions);
7707 case TemplateArgument::Expression:
7708 return TemplateArgument(ReadExpr(F));
7709 case TemplateArgument::Pack: {
7710 unsigned NumArgs = Record[Idx++];
7711 TemplateArgument *Args = new (Context) TemplateArgument[NumArgs];
7712 for (unsigned I = 0; I != NumArgs; ++I)
7713 Args[I] = ReadTemplateArgument(F, Record, Idx);
7714 return TemplateArgument(Args, NumArgs);
7718 llvm_unreachable("Unhandled template argument kind!");
7721 TemplateParameterList *
7722 ASTReader::ReadTemplateParameterList(ModuleFile &F,
7723 const RecordData &Record, unsigned &Idx) {
7724 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx);
7725 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx);
7726 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx);
7728 unsigned NumParams = Record[Idx++];
7729 SmallVector<NamedDecl *, 16> Params;
7730 Params.reserve(NumParams);
7732 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx));
7734 TemplateParameterList* TemplateParams =
7735 TemplateParameterList::Create(Context, TemplateLoc, LAngleLoc,
7736 Params.data(), Params.size(), RAngleLoc);
7737 return TemplateParams;
7742 ReadTemplateArgumentList(SmallVectorImpl<TemplateArgument> &TemplArgs,
7743 ModuleFile &F, const RecordData &Record,
7745 unsigned NumTemplateArgs = Record[Idx++];
7746 TemplArgs.reserve(NumTemplateArgs);
7747 while (NumTemplateArgs--)
7748 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx));
7751 /// \brief Read a UnresolvedSet structure.
7752 void ASTReader::ReadUnresolvedSet(ModuleFile &F, LazyASTUnresolvedSet &Set,
7753 const RecordData &Record, unsigned &Idx) {
7754 unsigned NumDecls = Record[Idx++];
7755 Set.reserve(Context, NumDecls);
7756 while (NumDecls--) {
7757 DeclID ID = ReadDeclID(F, Record, Idx);
7758 AccessSpecifier AS = (AccessSpecifier)Record[Idx++];
7759 Set.addLazyDecl(Context, ID, AS);
7764 ASTReader::ReadCXXBaseSpecifier(ModuleFile &F,
7765 const RecordData &Record, unsigned &Idx) {
7766 bool isVirtual = static_cast<bool>(Record[Idx++]);
7767 bool isBaseOfClass = static_cast<bool>(Record[Idx++]);
7768 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]);
7769 bool inheritConstructors = static_cast<bool>(Record[Idx++]);
7770 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx);
7771 SourceRange Range = ReadSourceRange(F, Record, Idx);
7772 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx);
7773 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo,
7775 Result.setInheritConstructors(inheritConstructors);
7779 std::pair<CXXCtorInitializer **, unsigned>
7780 ASTReader::ReadCXXCtorInitializers(ModuleFile &F, const RecordData &Record,
7782 CXXCtorInitializer **CtorInitializers = nullptr;
7783 unsigned NumInitializers = Record[Idx++];
7784 if (NumInitializers) {
7786 = new (Context) CXXCtorInitializer*[NumInitializers];
7787 for (unsigned i=0; i != NumInitializers; ++i) {
7788 TypeSourceInfo *TInfo = nullptr;
7789 bool IsBaseVirtual = false;
7790 FieldDecl *Member = nullptr;
7791 IndirectFieldDecl *IndirectMember = nullptr;
7793 CtorInitializerType Type = (CtorInitializerType)Record[Idx++];
7795 case CTOR_INITIALIZER_BASE:
7796 TInfo = GetTypeSourceInfo(F, Record, Idx);
7797 IsBaseVirtual = Record[Idx++];
7800 case CTOR_INITIALIZER_DELEGATING:
7801 TInfo = GetTypeSourceInfo(F, Record, Idx);
7804 case CTOR_INITIALIZER_MEMBER:
7805 Member = ReadDeclAs<FieldDecl>(F, Record, Idx);
7808 case CTOR_INITIALIZER_INDIRECT_MEMBER:
7809 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx);
7813 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx);
7814 Expr *Init = ReadExpr(F);
7815 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx);
7816 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx);
7817 bool IsWritten = Record[Idx++];
7818 unsigned SourceOrderOrNumArrayIndices;
7819 SmallVector<VarDecl *, 8> Indices;
7821 SourceOrderOrNumArrayIndices = Record[Idx++];
7823 SourceOrderOrNumArrayIndices = Record[Idx++];
7824 Indices.reserve(SourceOrderOrNumArrayIndices);
7825 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i)
7826 Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx));
7829 CXXCtorInitializer *BOMInit;
7830 if (Type == CTOR_INITIALIZER_BASE) {
7831 BOMInit = new (Context) CXXCtorInitializer(Context, TInfo, IsBaseVirtual,
7832 LParenLoc, Init, RParenLoc,
7833 MemberOrEllipsisLoc);
7834 } else if (Type == CTOR_INITIALIZER_DELEGATING) {
7835 BOMInit = new (Context) CXXCtorInitializer(Context, TInfo, LParenLoc,
7837 } else if (IsWritten) {
7839 BOMInit = new (Context) CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc,
7840 LParenLoc, Init, RParenLoc);
7842 BOMInit = new (Context) CXXCtorInitializer(Context, IndirectMember,
7843 MemberOrEllipsisLoc, LParenLoc,
7846 if (IndirectMember) {
7847 assert(Indices.empty() && "Indirect field improperly initialized");
7848 BOMInit = new (Context) CXXCtorInitializer(Context, IndirectMember,
7849 MemberOrEllipsisLoc, LParenLoc,
7852 BOMInit = CXXCtorInitializer::Create(Context, Member, MemberOrEllipsisLoc,
7853 LParenLoc, Init, RParenLoc,
7854 Indices.data(), Indices.size());
7859 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices);
7860 CtorInitializers[i] = BOMInit;
7864 return std::make_pair(CtorInitializers, NumInitializers);
7867 NestedNameSpecifier *
7868 ASTReader::ReadNestedNameSpecifier(ModuleFile &F,
7869 const RecordData &Record, unsigned &Idx) {
7870 unsigned N = Record[Idx++];
7871 NestedNameSpecifier *NNS = nullptr, *Prev = nullptr;
7872 for (unsigned I = 0; I != N; ++I) {
7873 NestedNameSpecifier::SpecifierKind Kind
7874 = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
7876 case NestedNameSpecifier::Identifier: {
7877 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx);
7878 NNS = NestedNameSpecifier::Create(Context, Prev, II);
7882 case NestedNameSpecifier::Namespace: {
7883 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx);
7884 NNS = NestedNameSpecifier::Create(Context, Prev, NS);
7888 case NestedNameSpecifier::NamespaceAlias: {
7889 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx);
7890 NNS = NestedNameSpecifier::Create(Context, Prev, Alias);
7894 case NestedNameSpecifier::TypeSpec:
7895 case NestedNameSpecifier::TypeSpecWithTemplate: {
7896 const Type *T = readType(F, Record, Idx).getTypePtrOrNull();
7900 bool Template = Record[Idx++];
7901 NNS = NestedNameSpecifier::Create(Context, Prev, Template, T);
7905 case NestedNameSpecifier::Global: {
7906 NNS = NestedNameSpecifier::GlobalSpecifier(Context);
7907 // No associated value, and there can't be a prefix.
7916 NestedNameSpecifierLoc
7917 ASTReader::ReadNestedNameSpecifierLoc(ModuleFile &F, const RecordData &Record,
7919 unsigned N = Record[Idx++];
7920 NestedNameSpecifierLocBuilder Builder;
7921 for (unsigned I = 0; I != N; ++I) {
7922 NestedNameSpecifier::SpecifierKind Kind
7923 = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
7925 case NestedNameSpecifier::Identifier: {
7926 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx);
7927 SourceRange Range = ReadSourceRange(F, Record, Idx);
7928 Builder.Extend(Context, II, Range.getBegin(), Range.getEnd());
7932 case NestedNameSpecifier::Namespace: {
7933 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx);
7934 SourceRange Range = ReadSourceRange(F, Record, Idx);
7935 Builder.Extend(Context, NS, Range.getBegin(), Range.getEnd());
7939 case NestedNameSpecifier::NamespaceAlias: {
7940 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx);
7941 SourceRange Range = ReadSourceRange(F, Record, Idx);
7942 Builder.Extend(Context, Alias, Range.getBegin(), Range.getEnd());
7946 case NestedNameSpecifier::TypeSpec:
7947 case NestedNameSpecifier::TypeSpecWithTemplate: {
7948 bool Template = Record[Idx++];
7949 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx);
7951 return NestedNameSpecifierLoc();
7952 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx);
7954 // FIXME: 'template' keyword location not saved anywhere, so we fake it.
7955 Builder.Extend(Context,
7956 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(),
7957 T->getTypeLoc(), ColonColonLoc);
7961 case NestedNameSpecifier::Global: {
7962 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx);
7963 Builder.MakeGlobal(Context, ColonColonLoc);
7969 return Builder.getWithLocInContext(Context);
7973 ASTReader::ReadSourceRange(ModuleFile &F, const RecordData &Record,
7975 SourceLocation beg = ReadSourceLocation(F, Record, Idx);
7976 SourceLocation end = ReadSourceLocation(F, Record, Idx);
7977 return SourceRange(beg, end);
7980 /// \brief Read an integral value
7981 llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) {
7982 unsigned BitWidth = Record[Idx++];
7983 unsigned NumWords = llvm::APInt::getNumWords(BitWidth);
7984 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]);
7989 /// \brief Read a signed integral value
7990 llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) {
7991 bool isUnsigned = Record[Idx++];
7992 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned);
7995 /// \brief Read a floating-point value
7996 llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record,
7997 const llvm::fltSemantics &Sem,
7999 return llvm::APFloat(Sem, ReadAPInt(Record, Idx));
8002 // \brief Read a string
8003 std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) {
8004 unsigned Len = Record[Idx++];
8005 std::string Result(Record.data() + Idx, Record.data() + Idx + Len);
8010 VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record,
8012 unsigned Major = Record[Idx++];
8013 unsigned Minor = Record[Idx++];
8014 unsigned Subminor = Record[Idx++];
8016 return VersionTuple(Major);
8018 return VersionTuple(Major, Minor - 1);
8019 return VersionTuple(Major, Minor - 1, Subminor - 1);
8022 CXXTemporary *ASTReader::ReadCXXTemporary(ModuleFile &F,
8023 const RecordData &Record,
8025 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx);
8026 return CXXTemporary::Create(Context, Decl);
8029 DiagnosticBuilder ASTReader::Diag(unsigned DiagID) {
8030 return Diag(CurrentImportLoc, DiagID);
8033 DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) {
8034 return Diags.Report(Loc, DiagID);
8037 /// \brief Retrieve the identifier table associated with the
8039 IdentifierTable &ASTReader::getIdentifierTable() {
8040 return PP.getIdentifierTable();
8043 /// \brief Record that the given ID maps to the given switch-case
8045 void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) {
8046 assert((*CurrSwitchCaseStmts)[ID] == nullptr &&
8047 "Already have a SwitchCase with this ID");
8048 (*CurrSwitchCaseStmts)[ID] = SC;
8051 /// \brief Retrieve the switch-case statement with the given ID.
8052 SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) {
8053 assert((*CurrSwitchCaseStmts)[ID] != nullptr && "No SwitchCase with this ID");
8054 return (*CurrSwitchCaseStmts)[ID];
8057 void ASTReader::ClearSwitchCaseIDs() {
8058 CurrSwitchCaseStmts->clear();
8061 void ASTReader::ReadComments() {
8062 std::vector<RawComment *> Comments;
8063 for (SmallVectorImpl<std::pair<BitstreamCursor,
8064 serialization::ModuleFile *> >::iterator
8065 I = CommentsCursors.begin(),
8066 E = CommentsCursors.end();
8069 BitstreamCursor &Cursor = I->first;
8070 serialization::ModuleFile &F = *I->second;
8071 SavedStreamPosition SavedPosition(Cursor);
8075 llvm::BitstreamEntry Entry =
8076 Cursor.advanceSkippingSubblocks(BitstreamCursor::AF_DontPopBlockAtEnd);
8078 switch (Entry.Kind) {
8079 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
8080 case llvm::BitstreamEntry::Error:
8081 Error("malformed block record in AST file");
8083 case llvm::BitstreamEntry::EndBlock:
8085 case llvm::BitstreamEntry::Record:
8086 // The interesting case.
8092 switch ((CommentRecordTypes)Cursor.readRecord(Entry.ID, Record)) {
8093 case COMMENTS_RAW_COMMENT: {
8095 SourceRange SR = ReadSourceRange(F, Record, Idx);
8096 RawComment::CommentKind Kind =
8097 (RawComment::CommentKind) Record[Idx++];
8098 bool IsTrailingComment = Record[Idx++];
8099 bool IsAlmostTrailingComment = Record[Idx++];
8100 Comments.push_back(new (Context) RawComment(
8101 SR, Kind, IsTrailingComment, IsAlmostTrailingComment,
8102 Context.getLangOpts().CommentOpts.ParseAllComments));
8108 Context.Comments.addDeserializedComments(Comments);
8112 std::string ASTReader::getOwningModuleNameForDiagnostic(const Decl *D) {
8113 // If we know the owning module, use it.
8114 if (Module *M = D->getOwningModule())
8115 return M->getFullModuleName();
8117 // Otherwise, use the name of the top-level module the decl is within.
8118 if (ModuleFile *M = getOwningModuleFile(D))
8119 return M->ModuleName;
8121 // Not from a module.
8125 void ASTReader::finishPendingActions() {
8126 while (!PendingIdentifierInfos.empty() ||
8127 !PendingIncompleteDeclChains.empty() || !PendingDeclChains.empty() ||
8128 !PendingMacroIDs.empty() || !PendingDeclContextInfos.empty() ||
8129 !PendingUpdateRecords.empty()) {
8130 // If any identifiers with corresponding top-level declarations have
8131 // been loaded, load those declarations now.
8132 typedef llvm::DenseMap<IdentifierInfo *, SmallVector<Decl *, 2> >
8134 TopLevelDeclsMap TopLevelDecls;
8136 while (!PendingIdentifierInfos.empty()) {
8137 IdentifierInfo *II = PendingIdentifierInfos.back().first;
8138 SmallVector<uint32_t, 4> DeclIDs =
8139 std::move(PendingIdentifierInfos.back().second);
8140 PendingIdentifierInfos.pop_back();
8142 SetGloballyVisibleDecls(II, DeclIDs, &TopLevelDecls[II]);
8145 // For each decl chain that we wanted to complete while deserializing, mark
8146 // it as "still needs to be completed".
8147 for (unsigned I = 0; I != PendingIncompleteDeclChains.size(); ++I) {
8148 markIncompleteDeclChain(PendingIncompleteDeclChains[I]);
8150 PendingIncompleteDeclChains.clear();
8152 // Load pending declaration chains.
8153 for (unsigned I = 0; I != PendingDeclChains.size(); ++I) {
8154 loadPendingDeclChain(PendingDeclChains[I]);
8155 PendingDeclChainsKnown.erase(PendingDeclChains[I]);
8157 PendingDeclChains.clear();
8159 // Make the most recent of the top-level declarations visible.
8160 for (TopLevelDeclsMap::iterator TLD = TopLevelDecls.begin(),
8161 TLDEnd = TopLevelDecls.end(); TLD != TLDEnd; ++TLD) {
8162 IdentifierInfo *II = TLD->first;
8163 for (unsigned I = 0, N = TLD->second.size(); I != N; ++I) {
8164 pushExternalDeclIntoScope(cast<NamedDecl>(TLD->second[I]), II);
8168 // Load any pending macro definitions.
8169 for (unsigned I = 0; I != PendingMacroIDs.size(); ++I) {
8170 IdentifierInfo *II = PendingMacroIDs.begin()[I].first;
8171 SmallVector<PendingMacroInfo, 2> GlobalIDs;
8172 GlobalIDs.swap(PendingMacroIDs.begin()[I].second);
8173 // Initialize the macro history from chained-PCHs ahead of module imports.
8174 for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
8176 const PendingMacroInfo &Info = GlobalIDs[IDIdx];
8177 if (Info.M->Kind != MK_Module)
8178 resolvePendingMacro(II, Info);
8180 // Handle module imports.
8181 for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
8183 const PendingMacroInfo &Info = GlobalIDs[IDIdx];
8184 if (Info.M->Kind == MK_Module)
8185 resolvePendingMacro(II, Info);
8188 PendingMacroIDs.clear();
8190 // Wire up the DeclContexts for Decls that we delayed setting until
8191 // recursive loading is completed.
8192 while (!PendingDeclContextInfos.empty()) {
8193 PendingDeclContextInfo Info = PendingDeclContextInfos.front();
8194 PendingDeclContextInfos.pop_front();
8195 DeclContext *SemaDC = cast<DeclContext>(GetDecl(Info.SemaDC));
8196 DeclContext *LexicalDC = cast<DeclContext>(GetDecl(Info.LexicalDC));
8197 Info.D->setDeclContextsImpl(SemaDC, LexicalDC, getContext());
8200 // Perform any pending declaration updates.
8201 while (!PendingUpdateRecords.empty()) {
8202 auto Update = PendingUpdateRecords.pop_back_val();
8203 ReadingKindTracker ReadingKind(Read_Decl, *this);
8204 loadDeclUpdateRecords(Update.first, Update.second);
8208 // If we deserialized any C++ or Objective-C class definitions, any
8209 // Objective-C protocol definitions, or any redeclarable templates, make sure
8210 // that all redeclarations point to the definitions. Note that this can only
8211 // happen now, after the redeclaration chains have been fully wired.
8212 for (llvm::SmallPtrSet<Decl *, 4>::iterator D = PendingDefinitions.begin(),
8213 DEnd = PendingDefinitions.end();
8215 if (TagDecl *TD = dyn_cast<TagDecl>(*D)) {
8216 if (const TagType *TagT = dyn_cast<TagType>(TD->getTypeForDecl())) {
8217 // Make sure that the TagType points at the definition.
8218 const_cast<TagType*>(TagT)->decl = TD;
8221 if (auto RD = dyn_cast<CXXRecordDecl>(*D)) {
8222 for (auto R : RD->redecls())
8223 cast<CXXRecordDecl>(R)->DefinitionData = RD->DefinitionData;
8229 if (auto ID = dyn_cast<ObjCInterfaceDecl>(*D)) {
8230 // Make sure that the ObjCInterfaceType points at the definition.
8231 const_cast<ObjCInterfaceType *>(cast<ObjCInterfaceType>(ID->TypeForDecl))
8234 for (auto R : ID->redecls())
8240 if (auto PD = dyn_cast<ObjCProtocolDecl>(*D)) {
8241 for (auto R : PD->redecls())
8247 auto RTD = cast<RedeclarableTemplateDecl>(*D)->getCanonicalDecl();
8248 for (auto R : RTD->redecls())
8249 R->Common = RTD->Common;
8251 PendingDefinitions.clear();
8253 // Load the bodies of any functions or methods we've encountered. We do
8254 // this now (delayed) so that we can be sure that the declaration chains
8255 // have been fully wired up.
8256 for (PendingBodiesMap::iterator PB = PendingBodies.begin(),
8257 PBEnd = PendingBodies.end();
8258 PB != PBEnd; ++PB) {
8259 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(PB->first)) {
8260 // FIXME: Check for =delete/=default?
8261 // FIXME: Complain about ODR violations here?
8262 if (!getContext().getLangOpts().Modules || !FD->hasBody())
8263 FD->setLazyBody(PB->second);
8267 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(PB->first);
8268 if (!getContext().getLangOpts().Modules || !MD->hasBody())
8269 MD->setLazyBody(PB->second);
8271 PendingBodies.clear();
8274 void ASTReader::diagnoseOdrViolations() {
8275 if (PendingOdrMergeFailures.empty() && PendingOdrMergeChecks.empty())
8278 // Trigger the import of the full definition of each class that had any
8279 // odr-merging problems, so we can produce better diagnostics for them.
8280 // These updates may in turn find and diagnose some ODR failures, so take
8281 // ownership of the set first.
8282 auto OdrMergeFailures = std::move(PendingOdrMergeFailures);
8283 PendingOdrMergeFailures.clear();
8284 for (auto &Merge : OdrMergeFailures) {
8285 Merge.first->buildLookup();
8286 Merge.first->decls_begin();
8287 Merge.first->bases_begin();
8288 Merge.first->vbases_begin();
8289 for (auto *RD : Merge.second) {
8296 // For each declaration from a merged context, check that the canonical
8297 // definition of that context also contains a declaration of the same
8300 // Caution: this loop does things that might invalidate iterators into
8301 // PendingOdrMergeChecks. Don't turn this into a range-based for loop!
8302 while (!PendingOdrMergeChecks.empty()) {
8303 NamedDecl *D = PendingOdrMergeChecks.pop_back_val();
8305 // FIXME: Skip over implicit declarations for now. This matters for things
8306 // like implicitly-declared special member functions. This isn't entirely
8307 // correct; we can end up with multiple unmerged declarations of the same
8309 if (D->isImplicit())
8312 DeclContext *CanonDef = D->getDeclContext();
8313 DeclContext::lookup_result R = CanonDef->lookup(D->getDeclName());
8316 const Decl *DCanon = D->getCanonicalDecl();
8318 llvm::SmallVector<const NamedDecl*, 4> Candidates;
8319 for (DeclContext::lookup_iterator I = R.begin(), E = R.end();
8320 !Found && I != E; ++I) {
8321 for (auto RI : (*I)->redecls()) {
8322 if (RI->getLexicalDeclContext() == CanonDef) {
8323 // This declaration is present in the canonical definition. If it's
8324 // in the same redecl chain, it's the one we're looking for.
8325 if (RI->getCanonicalDecl() == DCanon)
8328 Candidates.push_back(cast<NamedDecl>(RI));
8335 D->setInvalidDecl();
8337 std::string CanonDefModule =
8338 getOwningModuleNameForDiagnostic(cast<Decl>(CanonDef));
8339 Diag(D->getLocation(), diag::err_module_odr_violation_missing_decl)
8340 << D << getOwningModuleNameForDiagnostic(D)
8341 << CanonDef << CanonDefModule.empty() << CanonDefModule;
8343 if (Candidates.empty())
8344 Diag(cast<Decl>(CanonDef)->getLocation(),
8345 diag::note_module_odr_violation_no_possible_decls) << D;
8347 for (unsigned I = 0, N = Candidates.size(); I != N; ++I)
8348 Diag(Candidates[I]->getLocation(),
8349 diag::note_module_odr_violation_possible_decl)
8353 DiagnosedOdrMergeFailures.insert(CanonDef);
8357 // Issue any pending ODR-failure diagnostics.
8358 for (auto &Merge : OdrMergeFailures) {
8359 // If we've already pointed out a specific problem with this class, don't
8360 // bother issuing a general "something's different" diagnostic.
8361 if (!DiagnosedOdrMergeFailures.insert(Merge.first))
8364 bool Diagnosed = false;
8365 for (auto *RD : Merge.second) {
8366 // Multiple different declarations got merged together; tell the user
8367 // where they came from.
8368 if (Merge.first != RD) {
8369 // FIXME: Walk the definition, figure out what's different,
8370 // and diagnose that.
8372 std::string Module = getOwningModuleNameForDiagnostic(Merge.first);
8373 Diag(Merge.first->getLocation(),
8374 diag::err_module_odr_violation_different_definitions)
8375 << Merge.first << Module.empty() << Module;
8379 Diag(RD->getLocation(),
8380 diag::note_module_odr_violation_different_definitions)
8381 << getOwningModuleNameForDiagnostic(RD);
8386 // All definitions are updates to the same declaration. This happens if a
8387 // module instantiates the declaration of a class template specialization
8388 // and two or more other modules instantiate its definition.
8390 // FIXME: Indicate which modules had instantiations of this definition.
8391 // FIXME: How can this even happen?
8392 Diag(Merge.first->getLocation(),
8393 diag::err_module_odr_violation_different_instantiations)
8399 void ASTReader::FinishedDeserializing() {
8400 assert(NumCurrentElementsDeserializing &&
8401 "FinishedDeserializing not paired with StartedDeserializing");
8402 if (NumCurrentElementsDeserializing == 1) {
8403 // We decrease NumCurrentElementsDeserializing only after pending actions
8404 // are finished, to avoid recursively re-calling finishPendingActions().
8405 finishPendingActions();
8407 --NumCurrentElementsDeserializing;
8409 if (NumCurrentElementsDeserializing == 0) {
8410 diagnoseOdrViolations();
8412 // We are not in recursive loading, so it's safe to pass the "interesting"
8413 // decls to the consumer.
8415 PassInterestingDeclsToConsumer();
8419 void ASTReader::pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name) {
8420 D = D->getMostRecentDecl();
8422 if (SemaObj->IdResolver.tryAddTopLevelDecl(D, Name) && SemaObj->TUScope) {
8423 SemaObj->TUScope->AddDecl(D);
8424 } else if (SemaObj->TUScope) {
8425 // Adding the decl to IdResolver may have failed because it was already in
8426 // (even though it was not added in scope). If it is already in, make sure
8427 // it gets in the scope as well.
8428 if (std::find(SemaObj->IdResolver.begin(Name),
8429 SemaObj->IdResolver.end(), D) != SemaObj->IdResolver.end())
8430 SemaObj->TUScope->AddDecl(D);
8434 ASTReader::ASTReader(Preprocessor &PP, ASTContext &Context, StringRef isysroot,
8435 bool DisableValidation, bool AllowASTWithCompilerErrors,
8436 bool AllowConfigurationMismatch, bool ValidateSystemInputs,
8437 bool UseGlobalIndex)
8438 : Listener(new PCHValidator(PP, *this)), DeserializationListener(nullptr),
8439 OwnsDeserializationListener(false), SourceMgr(PP.getSourceManager()),
8440 FileMgr(PP.getFileManager()), Diags(PP.getDiagnostics()),
8441 SemaObj(nullptr), PP(PP), Context(Context), Consumer(nullptr),
8442 ModuleMgr(PP.getFileManager()), isysroot(isysroot),
8443 DisableValidation(DisableValidation),
8444 AllowASTWithCompilerErrors(AllowASTWithCompilerErrors),
8445 AllowConfigurationMismatch(AllowConfigurationMismatch),
8446 ValidateSystemInputs(ValidateSystemInputs),
8447 UseGlobalIndex(UseGlobalIndex), TriedLoadingGlobalIndex(false),
8448 CurrSwitchCaseStmts(&SwitchCaseStmts),
8449 NumSLocEntriesRead(0), TotalNumSLocEntries(0), NumStatementsRead(0),
8450 TotalNumStatements(0), NumMacrosRead(0), TotalNumMacros(0),
8451 NumIdentifierLookups(0), NumIdentifierLookupHits(0), NumSelectorsRead(0),
8452 NumMethodPoolEntriesRead(0), NumMethodPoolLookups(0),
8453 NumMethodPoolHits(0), NumMethodPoolTableLookups(0),
8454 NumMethodPoolTableHits(0), TotalNumMethodPoolEntries(0),
8455 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0),
8456 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0),
8457 TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0),
8458 PassingDeclsToConsumer(false), NumCXXBaseSpecifiersLoaded(0),
8459 ReadingKind(Read_None) {
8460 SourceMgr.setExternalSLocEntrySource(this);
8463 ASTReader::~ASTReader() {
8464 if (OwnsDeserializationListener)
8465 delete DeserializationListener;
8467 for (DeclContextVisibleUpdatesPending::iterator
8468 I = PendingVisibleUpdates.begin(),
8469 E = PendingVisibleUpdates.end();
8471 for (DeclContextVisibleUpdates::iterator J = I->second.begin(),
8472 F = I->second.end();