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Diffstat (limited to 'contrib/llvm/tools/clang/lib/Serialization/ASTReader.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Serialization/ASTReader.cpp | 7625 |
1 files changed, 7625 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Serialization/ASTReader.cpp b/contrib/llvm/tools/clang/lib/Serialization/ASTReader.cpp new file mode 100644 index 0000000..4d1b4b9 --- /dev/null +++ b/contrib/llvm/tools/clang/lib/Serialization/ASTReader.cpp @@ -0,0 +1,7625 @@ +//===--- ASTReader.cpp - AST File Reader ----------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines the ASTReader class, which reads AST files. +// +//===----------------------------------------------------------------------===// + +#include "clang/Serialization/ASTReader.h" +#include "ASTCommon.h" +#include "ASTReaderInternals.h" +#include "clang/AST/ASTConsumer.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/DeclTemplate.h" +#include "clang/AST/Expr.h" +#include "clang/AST/ExprCXX.h" +#include "clang/AST/NestedNameSpecifier.h" +#include "clang/AST/Type.h" +#include "clang/AST/TypeLocVisitor.h" +#include "clang/Basic/FileManager.h" +#include "clang/Basic/SourceManager.h" +#include "clang/Basic/SourceManagerInternals.h" +#include "clang/Basic/TargetInfo.h" +#include "clang/Basic/TargetOptions.h" +#include "clang/Basic/Version.h" +#include "clang/Basic/VersionTuple.h" +#include "clang/Lex/HeaderSearch.h" +#include "clang/Lex/HeaderSearchOptions.h" +#include "clang/Lex/MacroInfo.h" +#include "clang/Lex/PreprocessingRecord.h" +#include "clang/Lex/Preprocessor.h" +#include "clang/Lex/PreprocessorOptions.h" +#include "clang/Sema/Scope.h" +#include "clang/Sema/Sema.h" +#include "clang/Serialization/ASTDeserializationListener.h" +#include "clang/Serialization/GlobalModuleIndex.h" +#include "clang/Serialization/ModuleManager.h" +#include "clang/Serialization/SerializationDiagnostic.h" +#include "llvm/ADT/Hashing.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/Bitcode/BitstreamReader.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/SaveAndRestore.h" +#include "llvm/Support/system_error.h" +#include <algorithm> +#include <cstdio> +#include <iterator> + +using namespace clang; +using namespace clang::serialization; +using namespace clang::serialization::reader; +using llvm::BitstreamCursor; + +//===----------------------------------------------------------------------===// +// PCH validator implementation +//===----------------------------------------------------------------------===// + +ASTReaderListener::~ASTReaderListener() {} + +/// \brief Compare the given set of language options against an existing set of +/// language options. +/// +/// \param Diags If non-NULL, diagnostics will be emitted via this engine. +/// +/// \returns true if the languagae options mis-match, false otherwise. +static bool checkLanguageOptions(const LangOptions &LangOpts, + const LangOptions &ExistingLangOpts, + DiagnosticsEngine *Diags) { +#define LANGOPT(Name, Bits, Default, Description) \ + if (ExistingLangOpts.Name != LangOpts.Name) { \ + if (Diags) \ + Diags->Report(diag::err_pch_langopt_mismatch) \ + << Description << LangOpts.Name << ExistingLangOpts.Name; \ + return true; \ + } + +#define VALUE_LANGOPT(Name, Bits, Default, Description) \ + if (ExistingLangOpts.Name != LangOpts.Name) { \ + if (Diags) \ + Diags->Report(diag::err_pch_langopt_value_mismatch) \ + << Description; \ + return true; \ + } + +#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ + if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) { \ + if (Diags) \ + Diags->Report(diag::err_pch_langopt_value_mismatch) \ + << Description; \ + return true; \ + } + +#define BENIGN_LANGOPT(Name, Bits, Default, Description) +#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) +#include "clang/Basic/LangOptions.def" + + if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) { + if (Diags) + Diags->Report(diag::err_pch_langopt_value_mismatch) + << "target Objective-C runtime"; + return true; + } + + if (ExistingLangOpts.CommentOpts.BlockCommandNames != + LangOpts.CommentOpts.BlockCommandNames) { + if (Diags) + Diags->Report(diag::err_pch_langopt_value_mismatch) + << "block command names"; + return true; + } + + return false; +} + +/// \brief Compare the given set of target options against an existing set of +/// target options. +/// +/// \param Diags If non-NULL, diagnostics will be emitted via this engine. +/// +/// \returns true if the target options mis-match, false otherwise. +static bool checkTargetOptions(const TargetOptions &TargetOpts, + const TargetOptions &ExistingTargetOpts, + DiagnosticsEngine *Diags) { +#define CHECK_TARGET_OPT(Field, Name) \ + if (TargetOpts.Field != ExistingTargetOpts.Field) { \ + if (Diags) \ + Diags->Report(diag::err_pch_targetopt_mismatch) \ + << Name << TargetOpts.Field << ExistingTargetOpts.Field; \ + return true; \ + } + + CHECK_TARGET_OPT(Triple, "target"); + CHECK_TARGET_OPT(CPU, "target CPU"); + CHECK_TARGET_OPT(ABI, "target ABI"); + CHECK_TARGET_OPT(CXXABI, "target C++ ABI"); + CHECK_TARGET_OPT(LinkerVersion, "target linker version"); +#undef CHECK_TARGET_OPT + + // Compare feature sets. + SmallVector<StringRef, 4> ExistingFeatures( + ExistingTargetOpts.FeaturesAsWritten.begin(), + ExistingTargetOpts.FeaturesAsWritten.end()); + SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(), + TargetOpts.FeaturesAsWritten.end()); + std::sort(ExistingFeatures.begin(), ExistingFeatures.end()); + std::sort(ReadFeatures.begin(), ReadFeatures.end()); + + unsigned ExistingIdx = 0, ExistingN = ExistingFeatures.size(); + unsigned ReadIdx = 0, ReadN = ReadFeatures.size(); + while (ExistingIdx < ExistingN && ReadIdx < ReadN) { + if (ExistingFeatures[ExistingIdx] == ReadFeatures[ReadIdx]) { + ++ExistingIdx; + ++ReadIdx; + continue; + } + + if (ReadFeatures[ReadIdx] < ExistingFeatures[ExistingIdx]) { + if (Diags) + Diags->Report(diag::err_pch_targetopt_feature_mismatch) + << false << ReadFeatures[ReadIdx]; + return true; + } + + if (Diags) + Diags->Report(diag::err_pch_targetopt_feature_mismatch) + << true << ExistingFeatures[ExistingIdx]; + return true; + } + + if (ExistingIdx < ExistingN) { + if (Diags) + Diags->Report(diag::err_pch_targetopt_feature_mismatch) + << true << ExistingFeatures[ExistingIdx]; + return true; + } + + if (ReadIdx < ReadN) { + if (Diags) + Diags->Report(diag::err_pch_targetopt_feature_mismatch) + << false << ReadFeatures[ReadIdx]; + return true; + } + + return false; +} + +bool +PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts, + bool Complain) { + const LangOptions &ExistingLangOpts = PP.getLangOpts(); + return checkLanguageOptions(LangOpts, ExistingLangOpts, + Complain? &Reader.Diags : 0); +} + +bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts, + bool Complain) { + const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts(); + return checkTargetOptions(TargetOpts, ExistingTargetOpts, + Complain? &Reader.Diags : 0); +} + +namespace { + typedef llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/> > + MacroDefinitionsMap; + typedef llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8> > + DeclsMap; +} + +/// \brief Collect the macro definitions provided by the given preprocessor +/// options. +static void collectMacroDefinitions(const PreprocessorOptions &PPOpts, + MacroDefinitionsMap &Macros, + SmallVectorImpl<StringRef> *MacroNames = 0){ + for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) { + StringRef Macro = PPOpts.Macros[I].first; + bool IsUndef = PPOpts.Macros[I].second; + + std::pair<StringRef, StringRef> MacroPair = Macro.split('='); + StringRef MacroName = MacroPair.first; + StringRef MacroBody = MacroPair.second; + + // For an #undef'd macro, we only care about the name. + if (IsUndef) { + if (MacroNames && !Macros.count(MacroName)) + MacroNames->push_back(MacroName); + + Macros[MacroName] = std::make_pair("", true); + continue; + } + + // For a #define'd macro, figure out the actual definition. + if (MacroName.size() == Macro.size()) + MacroBody = "1"; + else { + // Note: GCC drops anything following an end-of-line character. + StringRef::size_type End = MacroBody.find_first_of("\n\r"); + MacroBody = MacroBody.substr(0, End); + } + + if (MacroNames && !Macros.count(MacroName)) + MacroNames->push_back(MacroName); + Macros[MacroName] = std::make_pair(MacroBody, false); + } +} + +/// \brief Check the preprocessor options deserialized from the control block +/// against the preprocessor options in an existing preprocessor. +/// +/// \param Diags If non-null, produce diagnostics for any mismatches incurred. +static bool checkPreprocessorOptions(const PreprocessorOptions &PPOpts, + const PreprocessorOptions &ExistingPPOpts, + DiagnosticsEngine *Diags, + FileManager &FileMgr, + std::string &SuggestedPredefines, + const LangOptions &LangOpts) { + // Check macro definitions. + MacroDefinitionsMap ASTFileMacros; + collectMacroDefinitions(PPOpts, ASTFileMacros); + MacroDefinitionsMap ExistingMacros; + SmallVector<StringRef, 4> ExistingMacroNames; + collectMacroDefinitions(ExistingPPOpts, ExistingMacros, &ExistingMacroNames); + + for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) { + // Dig out the macro definition in the existing preprocessor options. + StringRef MacroName = ExistingMacroNames[I]; + std::pair<StringRef, bool> Existing = ExistingMacros[MacroName]; + + // Check whether we know anything about this macro name or not. + llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/> >::iterator Known + = ASTFileMacros.find(MacroName); + if (Known == ASTFileMacros.end()) { + // FIXME: Check whether this identifier was referenced anywhere in the + // AST file. If so, we should reject the AST file. Unfortunately, this + // information isn't in the control block. What shall we do about it? + + if (Existing.second) { + SuggestedPredefines += "#undef "; + SuggestedPredefines += MacroName.str(); + SuggestedPredefines += '\n'; + } else { + SuggestedPredefines += "#define "; + SuggestedPredefines += MacroName.str(); + SuggestedPredefines += ' '; + SuggestedPredefines += Existing.first.str(); + SuggestedPredefines += '\n'; + } + continue; + } + + // If the macro was defined in one but undef'd in the other, we have a + // conflict. + if (Existing.second != Known->second.second) { + if (Diags) { + Diags->Report(diag::err_pch_macro_def_undef) + << MacroName << Known->second.second; + } + return true; + } + + // If the macro was #undef'd in both, or if the macro bodies are identical, + // it's fine. + if (Existing.second || Existing.first == Known->second.first) + continue; + + // The macro bodies differ; complain. + if (Diags) { + Diags->Report(diag::err_pch_macro_def_conflict) + << MacroName << Known->second.first << Existing.first; + } + return true; + } + + // Check whether we're using predefines. + if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines) { + if (Diags) { + Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines; + } + return true; + } + + // Detailed record is important since it is used for the module cache hash. + if (LangOpts.Modules && + PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord) { + if (Diags) { + Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord; + } + return true; + } + + // Compute the #include and #include_macros lines we need. + for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) { + StringRef File = ExistingPPOpts.Includes[I]; + if (File == ExistingPPOpts.ImplicitPCHInclude) + continue; + + if (std::find(PPOpts.Includes.begin(), PPOpts.Includes.end(), File) + != PPOpts.Includes.end()) + continue; + + SuggestedPredefines += "#include \""; + SuggestedPredefines += + HeaderSearch::NormalizeDashIncludePath(File, FileMgr); + SuggestedPredefines += "\"\n"; + } + + for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) { + StringRef File = ExistingPPOpts.MacroIncludes[I]; + if (std::find(PPOpts.MacroIncludes.begin(), PPOpts.MacroIncludes.end(), + File) + != PPOpts.MacroIncludes.end()) + continue; + + SuggestedPredefines += "#__include_macros \""; + SuggestedPredefines += + HeaderSearch::NormalizeDashIncludePath(File, FileMgr); + SuggestedPredefines += "\"\n##\n"; + } + + return false; +} + +bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts, + bool Complain, + std::string &SuggestedPredefines) { + const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts(); + + return checkPreprocessorOptions(PPOpts, ExistingPPOpts, + Complain? &Reader.Diags : 0, + PP.getFileManager(), + SuggestedPredefines, + PP.getLangOpts()); +} + +void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) { + PP.setCounterValue(Value); +} + +//===----------------------------------------------------------------------===// +// AST reader implementation +//===----------------------------------------------------------------------===// + +void +ASTReader::setDeserializationListener(ASTDeserializationListener *Listener) { + DeserializationListener = Listener; +} + + + +unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) { + return serialization::ComputeHash(Sel); +} + + +std::pair<unsigned, unsigned> +ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) { + using namespace clang::io; + unsigned KeyLen = ReadUnalignedLE16(d); + unsigned DataLen = ReadUnalignedLE16(d); + return std::make_pair(KeyLen, DataLen); +} + +ASTSelectorLookupTrait::internal_key_type +ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) { + using namespace clang::io; + SelectorTable &SelTable = Reader.getContext().Selectors; + unsigned N = ReadUnalignedLE16(d); + IdentifierInfo *FirstII + = Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); + if (N == 0) + return SelTable.getNullarySelector(FirstII); + else if (N == 1) + return SelTable.getUnarySelector(FirstII); + + SmallVector<IdentifierInfo *, 16> Args; + Args.push_back(FirstII); + for (unsigned I = 1; I != N; ++I) + Args.push_back(Reader.getLocalIdentifier(F, ReadUnalignedLE32(d))); + + return SelTable.getSelector(N, Args.data()); +} + +ASTSelectorLookupTrait::data_type +ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d, + unsigned DataLen) { + using namespace clang::io; + + data_type Result; + + Result.ID = Reader.getGlobalSelectorID(F, ReadUnalignedLE32(d)); + unsigned NumInstanceMethodsAndBits = ReadUnalignedLE16(d); + unsigned NumFactoryMethodsAndBits = ReadUnalignedLE16(d); + Result.InstanceBits = NumInstanceMethodsAndBits & 0x3; + Result.FactoryBits = NumFactoryMethodsAndBits & 0x3; + unsigned NumInstanceMethods = NumInstanceMethodsAndBits >> 2; + unsigned NumFactoryMethods = NumFactoryMethodsAndBits >> 2; + + // Load instance methods + for (unsigned I = 0; I != NumInstanceMethods; ++I) { + if (ObjCMethodDecl *Method + = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d))) + Result.Instance.push_back(Method); + } + + // Load factory methods + for (unsigned I = 0; I != NumFactoryMethods; ++I) { + if (ObjCMethodDecl *Method + = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d))) + Result.Factory.push_back(Method); + } + + return Result; +} + +unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) { + return llvm::HashString(a); +} + +std::pair<unsigned, unsigned> +ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) { + using namespace clang::io; + unsigned DataLen = ReadUnalignedLE16(d); + unsigned KeyLen = ReadUnalignedLE16(d); + return std::make_pair(KeyLen, DataLen); +} + +ASTIdentifierLookupTraitBase::internal_key_type +ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) { + assert(n >= 2 && d[n-1] == '\0'); + return StringRef((const char*) d, n-1); +} + +/// \brief Whether the given identifier is "interesting". +static bool isInterestingIdentifier(IdentifierInfo &II) { + return II.isPoisoned() || + II.isExtensionToken() || + II.getObjCOrBuiltinID() || + II.hasRevertedTokenIDToIdentifier() || + II.hadMacroDefinition() || + II.getFETokenInfo<void>(); +} + +IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k, + const unsigned char* d, + unsigned DataLen) { + using namespace clang::io; + unsigned RawID = ReadUnalignedLE32(d); + bool IsInteresting = RawID & 0x01; + + // Wipe out the "is interesting" bit. + RawID = RawID >> 1; + + IdentID ID = Reader.getGlobalIdentifierID(F, RawID); + if (!IsInteresting) { + // For uninteresting identifiers, just build the IdentifierInfo + // and associate it with the persistent ID. + IdentifierInfo *II = KnownII; + if (!II) { + II = &Reader.getIdentifierTable().getOwn(k); + KnownII = II; + } + Reader.SetIdentifierInfo(ID, II); + if (!II->isFromAST()) { + bool WasInteresting = isInterestingIdentifier(*II); + II->setIsFromAST(); + if (WasInteresting) + II->setChangedSinceDeserialization(); + } + Reader.markIdentifierUpToDate(II); + return II; + } + + unsigned ObjCOrBuiltinID = ReadUnalignedLE16(d); + unsigned Bits = ReadUnalignedLE16(d); + bool CPlusPlusOperatorKeyword = Bits & 0x01; + Bits >>= 1; + bool HasRevertedTokenIDToIdentifier = Bits & 0x01; + Bits >>= 1; + bool Poisoned = Bits & 0x01; + Bits >>= 1; + bool ExtensionToken = Bits & 0x01; + Bits >>= 1; + bool hasSubmoduleMacros = Bits & 0x01; + Bits >>= 1; + bool hadMacroDefinition = Bits & 0x01; + Bits >>= 1; + + assert(Bits == 0 && "Extra bits in the identifier?"); + DataLen -= 8; + + // Build the IdentifierInfo itself and link the identifier ID with + // the new IdentifierInfo. + IdentifierInfo *II = KnownII; + if (!II) { + II = &Reader.getIdentifierTable().getOwn(StringRef(k)); + KnownII = II; + } + Reader.markIdentifierUpToDate(II); + if (!II->isFromAST()) { + bool WasInteresting = isInterestingIdentifier(*II); + II->setIsFromAST(); + if (WasInteresting) + II->setChangedSinceDeserialization(); + } + + // Set or check the various bits in the IdentifierInfo structure. + // Token IDs are read-only. + if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier) + II->RevertTokenIDToIdentifier(); + II->setObjCOrBuiltinID(ObjCOrBuiltinID); + assert(II->isExtensionToken() == ExtensionToken && + "Incorrect extension token flag"); + (void)ExtensionToken; + if (Poisoned) + II->setIsPoisoned(true); + assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && + "Incorrect C++ operator keyword flag"); + (void)CPlusPlusOperatorKeyword; + + // If this identifier is a macro, deserialize the macro + // definition. + if (hadMacroDefinition) { + uint32_t MacroDirectivesOffset = ReadUnalignedLE32(d); + DataLen -= 4; + SmallVector<uint32_t, 8> LocalMacroIDs; + if (hasSubmoduleMacros) { + while (uint32_t LocalMacroID = ReadUnalignedLE32(d)) { + DataLen -= 4; + LocalMacroIDs.push_back(LocalMacroID); + } + DataLen -= 4; + } + + if (F.Kind == MK_Module) { + for (SmallVectorImpl<uint32_t>::iterator + I = LocalMacroIDs.begin(), E = LocalMacroIDs.end(); I != E; ++I) { + MacroID MacID = Reader.getGlobalMacroID(F, *I); + Reader.addPendingMacroFromModule(II, &F, MacID, F.DirectImportLoc); + } + } else { + Reader.addPendingMacroFromPCH(II, &F, MacroDirectivesOffset); + } + } + + Reader.SetIdentifierInfo(ID, II); + + // Read all of the declarations visible at global scope with this + // name. + if (DataLen > 0) { + SmallVector<uint32_t, 4> DeclIDs; + for (; DataLen > 0; DataLen -= 4) + DeclIDs.push_back(Reader.getGlobalDeclID(F, ReadUnalignedLE32(d))); + Reader.SetGloballyVisibleDecls(II, DeclIDs); + } + + return II; +} + +unsigned +ASTDeclContextNameLookupTrait::ComputeHash(const DeclNameKey &Key) const { + llvm::FoldingSetNodeID ID; + ID.AddInteger(Key.Kind); + + switch (Key.Kind) { + case DeclarationName::Identifier: + case DeclarationName::CXXLiteralOperatorName: + ID.AddString(((IdentifierInfo*)Key.Data)->getName()); + break; + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + ID.AddInteger(serialization::ComputeHash(Selector(Key.Data))); + break; + case DeclarationName::CXXOperatorName: + ID.AddInteger((OverloadedOperatorKind)Key.Data); + break; + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + case DeclarationName::CXXUsingDirective: + break; + } + + return ID.ComputeHash(); +} + +ASTDeclContextNameLookupTrait::internal_key_type +ASTDeclContextNameLookupTrait::GetInternalKey( + const external_key_type& Name) const { + DeclNameKey Key; + Key.Kind = Name.getNameKind(); + switch (Name.getNameKind()) { + case DeclarationName::Identifier: + Key.Data = (uint64_t)Name.getAsIdentifierInfo(); + break; + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr(); + break; + case DeclarationName::CXXOperatorName: + Key.Data = Name.getCXXOverloadedOperator(); + break; + case DeclarationName::CXXLiteralOperatorName: + Key.Data = (uint64_t)Name.getCXXLiteralIdentifier(); + break; + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + case DeclarationName::CXXUsingDirective: + Key.Data = 0; + break; + } + + return Key; +} + +std::pair<unsigned, unsigned> +ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char*& d) { + using namespace clang::io; + unsigned KeyLen = ReadUnalignedLE16(d); + unsigned DataLen = ReadUnalignedLE16(d); + return std::make_pair(KeyLen, DataLen); +} + +ASTDeclContextNameLookupTrait::internal_key_type +ASTDeclContextNameLookupTrait::ReadKey(const unsigned char* d, unsigned) { + using namespace clang::io; + + DeclNameKey Key; + Key.Kind = (DeclarationName::NameKind)*d++; + switch (Key.Kind) { + case DeclarationName::Identifier: + Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); + break; + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + Key.Data = + (uint64_t)Reader.getLocalSelector(F, ReadUnalignedLE32(d)) + .getAsOpaquePtr(); + break; + case DeclarationName::CXXOperatorName: + Key.Data = *d++; // OverloadedOperatorKind + break; + case DeclarationName::CXXLiteralOperatorName: + Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); + break; + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + case DeclarationName::CXXUsingDirective: + Key.Data = 0; + break; + } + + return Key; +} + +ASTDeclContextNameLookupTrait::data_type +ASTDeclContextNameLookupTrait::ReadData(internal_key_type, + const unsigned char* d, + unsigned DataLen) { + using namespace clang::io; + unsigned NumDecls = ReadUnalignedLE16(d); + LE32DeclID *Start = reinterpret_cast<LE32DeclID *>( + const_cast<unsigned char *>(d)); + return std::make_pair(Start, Start + NumDecls); +} + +bool ASTReader::ReadDeclContextStorage(ModuleFile &M, + BitstreamCursor &Cursor, + const std::pair<uint64_t, uint64_t> &Offsets, + DeclContextInfo &Info) { + SavedStreamPosition SavedPosition(Cursor); + // First the lexical decls. + if (Offsets.first != 0) { + Cursor.JumpToBit(Offsets.first); + + RecordData Record; + StringRef Blob; + unsigned Code = Cursor.ReadCode(); + unsigned RecCode = Cursor.readRecord(Code, Record, &Blob); + if (RecCode != DECL_CONTEXT_LEXICAL) { + Error("Expected lexical block"); + return true; + } + + Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob.data()); + Info.NumLexicalDecls = Blob.size() / sizeof(KindDeclIDPair); + } + + // Now the lookup table. + if (Offsets.second != 0) { + Cursor.JumpToBit(Offsets.second); + + RecordData Record; + StringRef Blob; + unsigned Code = Cursor.ReadCode(); + unsigned RecCode = Cursor.readRecord(Code, Record, &Blob); + if (RecCode != DECL_CONTEXT_VISIBLE) { + Error("Expected visible lookup table block"); + return true; + } + Info.NameLookupTableData + = ASTDeclContextNameLookupTable::Create( + (const unsigned char *)Blob.data() + Record[0], + (const unsigned char *)Blob.data(), + ASTDeclContextNameLookupTrait(*this, M)); + } + + return false; +} + +void ASTReader::Error(StringRef Msg) { + Error(diag::err_fe_pch_malformed, Msg); + if (Context.getLangOpts().Modules && !Diags.isDiagnosticInFlight()) { + Diag(diag::note_module_cache_path) + << PP.getHeaderSearchInfo().getModuleCachePath(); + } +} + +void ASTReader::Error(unsigned DiagID, + StringRef Arg1, StringRef Arg2) { + if (Diags.isDiagnosticInFlight()) + Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2); + else + Diag(DiagID) << Arg1 << Arg2; +} + +//===----------------------------------------------------------------------===// +// Source Manager Deserialization +//===----------------------------------------------------------------------===// + +/// \brief Read the line table in the source manager block. +/// \returns true if there was an error. +bool ASTReader::ParseLineTable(ModuleFile &F, + SmallVectorImpl<uint64_t> &Record) { + unsigned Idx = 0; + LineTableInfo &LineTable = SourceMgr.getLineTable(); + + // Parse the file names + std::map<int, int> FileIDs; + for (int I = 0, N = Record[Idx++]; I != N; ++I) { + // Extract the file name + unsigned FilenameLen = Record[Idx++]; + std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); + Idx += FilenameLen; + MaybeAddSystemRootToFilename(F, Filename); + FileIDs[I] = LineTable.getLineTableFilenameID(Filename); + } + + // Parse the line entries + std::vector<LineEntry> Entries; + while (Idx < Record.size()) { + int FID = Record[Idx++]; + assert(FID >= 0 && "Serialized line entries for non-local file."); + // Remap FileID from 1-based old view. + FID += F.SLocEntryBaseID - 1; + + // Extract the line entries + unsigned NumEntries = Record[Idx++]; + assert(NumEntries && "Numentries is 00000"); + Entries.clear(); + Entries.reserve(NumEntries); + for (unsigned I = 0; I != NumEntries; ++I) { + unsigned FileOffset = Record[Idx++]; + unsigned LineNo = Record[Idx++]; + int FilenameID = FileIDs[Record[Idx++]]; + SrcMgr::CharacteristicKind FileKind + = (SrcMgr::CharacteristicKind)Record[Idx++]; + unsigned IncludeOffset = Record[Idx++]; + Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, + FileKind, IncludeOffset)); + } + LineTable.AddEntry(FileID::get(FID), Entries); + } + + return false; +} + +/// \brief Read a source manager block +bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) { + using namespace SrcMgr; + + BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; + + // Set the source-location entry cursor to the current position in + // the stream. This cursor will be used to read the contents of the + // source manager block initially, and then lazily read + // source-location entries as needed. + SLocEntryCursor = F.Stream; + + // The stream itself is going to skip over the source manager block. + if (F.Stream.SkipBlock()) { + Error("malformed block record in AST file"); + return true; + } + + // Enter the source manager block. + if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) { + Error("malformed source manager block record in AST file"); + return true; + } + + RecordData Record; + while (true) { + llvm::BitstreamEntry E = SLocEntryCursor.advanceSkippingSubblocks(); + + switch (E.Kind) { + case llvm::BitstreamEntry::SubBlock: // Handled for us already. + case llvm::BitstreamEntry::Error: + Error("malformed block record in AST file"); + return true; + case llvm::BitstreamEntry::EndBlock: + return false; + case llvm::BitstreamEntry::Record: + // The interesting case. + break; + } + + // Read a record. + Record.clear(); + StringRef Blob; + switch (SLocEntryCursor.readRecord(E.ID, Record, &Blob)) { + default: // Default behavior: ignore. + break; + + case SM_SLOC_FILE_ENTRY: + case SM_SLOC_BUFFER_ENTRY: + case SM_SLOC_EXPANSION_ENTRY: + // Once we hit one of the source location entries, we're done. + return false; + } + } +} + +/// \brief If a header file is not found at the path that we expect it to be +/// and the PCH file was moved from its original location, try to resolve the +/// file by assuming that header+PCH were moved together and the header is in +/// the same place relative to the PCH. +static std::string +resolveFileRelativeToOriginalDir(const std::string &Filename, + const std::string &OriginalDir, + const std::string &CurrDir) { + assert(OriginalDir != CurrDir && + "No point trying to resolve the file if the PCH dir didn't change"); + using namespace llvm::sys; + SmallString<128> filePath(Filename); + fs::make_absolute(filePath); + assert(path::is_absolute(OriginalDir)); + SmallString<128> currPCHPath(CurrDir); + + path::const_iterator fileDirI = path::begin(path::parent_path(filePath)), + fileDirE = path::end(path::parent_path(filePath)); + path::const_iterator origDirI = path::begin(OriginalDir), + origDirE = path::end(OriginalDir); + // Skip the common path components from filePath and OriginalDir. + while (fileDirI != fileDirE && origDirI != origDirE && + *fileDirI == *origDirI) { + ++fileDirI; + ++origDirI; + } + for (; origDirI != origDirE; ++origDirI) + path::append(currPCHPath, ".."); + path::append(currPCHPath, fileDirI, fileDirE); + path::append(currPCHPath, path::filename(Filename)); + return currPCHPath.str(); +} + +bool ASTReader::ReadSLocEntry(int ID) { + if (ID == 0) + return false; + + if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) { + Error("source location entry ID out-of-range for AST file"); + return true; + } + + ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second; + F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]); + BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; + unsigned BaseOffset = F->SLocEntryBaseOffset; + + ++NumSLocEntriesRead; + llvm::BitstreamEntry Entry = SLocEntryCursor.advance(); + if (Entry.Kind != llvm::BitstreamEntry::Record) { + Error("incorrectly-formatted source location entry in AST file"); + return true; + } + + RecordData Record; + StringRef Blob; + switch (SLocEntryCursor.readRecord(Entry.ID, Record, &Blob)) { + default: + Error("incorrectly-formatted source location entry in AST file"); + return true; + + case SM_SLOC_FILE_ENTRY: { + // We will detect whether a file changed and return 'Failure' for it, but + // we will also try to fail gracefully by setting up the SLocEntry. + unsigned InputID = Record[4]; + InputFile IF = getInputFile(*F, InputID); + const FileEntry *File = IF.getFile(); + bool OverriddenBuffer = IF.isOverridden(); + + // Note that we only check if a File was returned. If it was out-of-date + // we have complained but we will continue creating a FileID to recover + // gracefully. + if (!File) + return true; + + SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]); + if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) { + // This is the module's main file. + IncludeLoc = getImportLocation(F); + } + SrcMgr::CharacteristicKind + FileCharacter = (SrcMgr::CharacteristicKind)Record[2]; + FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter, + ID, BaseOffset + Record[0]); + SrcMgr::FileInfo &FileInfo = + const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()); + FileInfo.NumCreatedFIDs = Record[5]; + if (Record[3]) + FileInfo.setHasLineDirectives(); + + const DeclID *FirstDecl = F->FileSortedDecls + Record[6]; + unsigned NumFileDecls = Record[7]; + if (NumFileDecls) { + assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?"); + FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl, + NumFileDecls)); + } + + const SrcMgr::ContentCache *ContentCache + = SourceMgr.getOrCreateContentCache(File, + /*isSystemFile=*/FileCharacter != SrcMgr::C_User); + if (OverriddenBuffer && !ContentCache->BufferOverridden && + ContentCache->ContentsEntry == ContentCache->OrigEntry) { + unsigned Code = SLocEntryCursor.ReadCode(); + Record.clear(); + unsigned RecCode = SLocEntryCursor.readRecord(Code, Record, &Blob); + + if (RecCode != SM_SLOC_BUFFER_BLOB) { + Error("AST record has invalid code"); + return true; + } + + llvm::MemoryBuffer *Buffer + = llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), File->getName()); + SourceMgr.overrideFileContents(File, Buffer); + } + + break; + } + + case SM_SLOC_BUFFER_ENTRY: { + const char *Name = Blob.data(); + unsigned Offset = Record[0]; + SrcMgr::CharacteristicKind + FileCharacter = (SrcMgr::CharacteristicKind)Record[2]; + SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]); + if (IncludeLoc.isInvalid() && F->Kind == MK_Module) { + IncludeLoc = getImportLocation(F); + } + unsigned Code = SLocEntryCursor.ReadCode(); + Record.clear(); + unsigned RecCode + = SLocEntryCursor.readRecord(Code, Record, &Blob); + + if (RecCode != SM_SLOC_BUFFER_BLOB) { + Error("AST record has invalid code"); + return true; + } + + llvm::MemoryBuffer *Buffer + = llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name); + SourceMgr.createFileIDForMemBuffer(Buffer, FileCharacter, ID, + BaseOffset + Offset, IncludeLoc); + break; + } + + case SM_SLOC_EXPANSION_ENTRY: { + SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]); + SourceMgr.createExpansionLoc(SpellingLoc, + ReadSourceLocation(*F, Record[2]), + ReadSourceLocation(*F, Record[3]), + Record[4], + ID, + BaseOffset + Record[0]); + break; + } + } + + return false; +} + +std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) { + if (ID == 0) + return std::make_pair(SourceLocation(), ""); + + if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) { + Error("source location entry ID out-of-range for AST file"); + return std::make_pair(SourceLocation(), ""); + } + + // Find which module file this entry lands in. + ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second; + if (M->Kind != MK_Module) + return std::make_pair(SourceLocation(), ""); + + // FIXME: Can we map this down to a particular submodule? That would be + // ideal. + return std::make_pair(M->ImportLoc, llvm::sys::path::stem(M->FileName)); +} + +/// \brief Find the location where the module F is imported. +SourceLocation ASTReader::getImportLocation(ModuleFile *F) { + if (F->ImportLoc.isValid()) + return F->ImportLoc; + + // Otherwise we have a PCH. It's considered to be "imported" at the first + // location of its includer. + if (F->ImportedBy.empty() || !F->ImportedBy[0]) { + // Main file is the importer. We assume that it is the first entry in the + // entry table. We can't ask the manager, because at the time of PCH loading + // the main file entry doesn't exist yet. + // The very first entry is the invalid instantiation loc, which takes up + // offsets 0 and 1. + return SourceLocation::getFromRawEncoding(2U); + } + //return F->Loaders[0]->FirstLoc; + return F->ImportedBy[0]->FirstLoc; +} + +/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the +/// specified cursor. Read the abbreviations that are at the top of the block +/// and then leave the cursor pointing into the block. +bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) { + if (Cursor.EnterSubBlock(BlockID)) { + Error("malformed block record in AST file"); + return Failure; + } + + while (true) { + uint64_t Offset = Cursor.GetCurrentBitNo(); + unsigned Code = Cursor.ReadCode(); + + // We expect all abbrevs to be at the start of the block. + if (Code != llvm::bitc::DEFINE_ABBREV) { + Cursor.JumpToBit(Offset); + return false; + } + Cursor.ReadAbbrevRecord(); + } +} + +Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record, + unsigned &Idx) { + Token Tok; + Tok.startToken(); + Tok.setLocation(ReadSourceLocation(F, Record, Idx)); + Tok.setLength(Record[Idx++]); + if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++])) + Tok.setIdentifierInfo(II); + Tok.setKind((tok::TokenKind)Record[Idx++]); + Tok.setFlag((Token::TokenFlags)Record[Idx++]); + return Tok; +} + +MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) { + BitstreamCursor &Stream = F.MacroCursor; + + // Keep track of where we are in the stream, then jump back there + // after reading this macro. + SavedStreamPosition SavedPosition(Stream); + + Stream.JumpToBit(Offset); + RecordData Record; + SmallVector<IdentifierInfo*, 16> MacroArgs; + MacroInfo *Macro = 0; + + while (true) { + // Advance to the next record, but if we get to the end of the block, don't + // pop it (removing all the abbreviations from the cursor) since we want to + // be able to reseek within the block and read entries. + unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd; + llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(Flags); + + switch (Entry.Kind) { + case llvm::BitstreamEntry::SubBlock: // Handled for us already. + case llvm::BitstreamEntry::Error: + Error("malformed block record in AST file"); + return Macro; + case llvm::BitstreamEntry::EndBlock: + return Macro; + case llvm::BitstreamEntry::Record: + // The interesting case. + break; + } + + // Read a record. + Record.clear(); + PreprocessorRecordTypes RecType = + (PreprocessorRecordTypes)Stream.readRecord(Entry.ID, Record); + switch (RecType) { + case PP_MACRO_DIRECTIVE_HISTORY: + return Macro; + + case PP_MACRO_OBJECT_LIKE: + case PP_MACRO_FUNCTION_LIKE: { + // If we already have a macro, that means that we've hit the end + // of the definition of the macro we were looking for. We're + // done. + if (Macro) + return Macro; + + unsigned NextIndex = 1; // Skip identifier ID. + SubmoduleID SubModID = getGlobalSubmoduleID(F, Record[NextIndex++]); + SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex); + MacroInfo *MI = PP.AllocateDeserializedMacroInfo(Loc, SubModID); + MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex)); + MI->setIsUsed(Record[NextIndex++]); + + if (RecType == PP_MACRO_FUNCTION_LIKE) { + // Decode function-like macro info. + bool isC99VarArgs = Record[NextIndex++]; + bool isGNUVarArgs = Record[NextIndex++]; + bool hasCommaPasting = Record[NextIndex++]; + MacroArgs.clear(); + unsigned NumArgs = Record[NextIndex++]; + for (unsigned i = 0; i != NumArgs; ++i) + MacroArgs.push_back(getLocalIdentifier(F, Record[NextIndex++])); + + // Install function-like macro info. + MI->setIsFunctionLike(); + if (isC99VarArgs) MI->setIsC99Varargs(); + if (isGNUVarArgs) MI->setIsGNUVarargs(); + if (hasCommaPasting) MI->setHasCommaPasting(); + MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), + PP.getPreprocessorAllocator()); + } + + // Remember that we saw this macro last so that we add the tokens that + // form its body to it. + Macro = MI; + + if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() && + Record[NextIndex]) { + // We have a macro definition. Register the association + PreprocessedEntityID + GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]); + PreprocessingRecord &PPRec = *PP.getPreprocessingRecord(); + PreprocessingRecord::PPEntityID + PPID = PPRec.getPPEntityID(GlobalID-1, /*isLoaded=*/true); + MacroDefinition *PPDef = + cast_or_null<MacroDefinition>(PPRec.getPreprocessedEntity(PPID)); + if (PPDef) + PPRec.RegisterMacroDefinition(Macro, PPDef); + } + + ++NumMacrosRead; + break; + } + + case PP_TOKEN: { + // If we see a TOKEN before a PP_MACRO_*, then the file is + // erroneous, just pretend we didn't see this. + if (Macro == 0) break; + + unsigned Idx = 0; + Token Tok = ReadToken(F, Record, Idx); + Macro->AddTokenToBody(Tok); + break; + } + } + } +} + +PreprocessedEntityID +ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M, unsigned LocalID) const { + ContinuousRangeMap<uint32_t, int, 2>::const_iterator + I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS); + assert(I != M.PreprocessedEntityRemap.end() + && "Invalid index into preprocessed entity index remap"); + + return LocalID + I->second; +} + +unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) { + return llvm::hash_combine(ikey.Size, ikey.ModTime); +} + +HeaderFileInfoTrait::internal_key_type +HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) { + internal_key_type ikey = { FE->getSize(), FE->getModificationTime(), + FE->getName() }; + return ikey; +} + +bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) { + if (a.Size != b.Size || a.ModTime != b.ModTime) + return false; + + if (strcmp(a.Filename, b.Filename) == 0) + return true; + + // Determine whether the actual files are equivalent. + FileManager &FileMgr = Reader.getFileManager(); + const FileEntry *FEA = FileMgr.getFile(a.Filename); + const FileEntry *FEB = FileMgr.getFile(b.Filename); + return (FEA && FEA == FEB); +} + +std::pair<unsigned, unsigned> +HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) { + unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); + unsigned DataLen = (unsigned) *d++; + return std::make_pair(KeyLen, DataLen); +} + +HeaderFileInfoTrait::internal_key_type +HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) { + internal_key_type ikey; + ikey.Size = off_t(clang::io::ReadUnalignedLE64(d)); + ikey.ModTime = time_t(clang::io::ReadUnalignedLE64(d)); + ikey.Filename = (const char *)d; + return ikey; +} + +HeaderFileInfoTrait::data_type +HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d, + unsigned DataLen) { + const unsigned char *End = d + DataLen; + using namespace clang::io; + HeaderFileInfo HFI; + unsigned Flags = *d++; + HFI.HeaderRole = static_cast<ModuleMap::ModuleHeaderRole> + ((Flags >> 6) & 0x03); + HFI.isImport = (Flags >> 5) & 0x01; + HFI.isPragmaOnce = (Flags >> 4) & 0x01; + HFI.DirInfo = (Flags >> 2) & 0x03; + HFI.Resolved = (Flags >> 1) & 0x01; + HFI.IndexHeaderMapHeader = Flags & 0x01; + HFI.NumIncludes = ReadUnalignedLE16(d); + HFI.ControllingMacroID = Reader.getGlobalIdentifierID(M, + ReadUnalignedLE32(d)); + if (unsigned FrameworkOffset = ReadUnalignedLE32(d)) { + // The framework offset is 1 greater than the actual offset, + // since 0 is used as an indicator for "no framework name". + StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1); + HFI.Framework = HS->getUniqueFrameworkName(FrameworkName); + } + + if (d != End) { + uint32_t LocalSMID = ReadUnalignedLE32(d); + if (LocalSMID) { + // This header is part of a module. Associate it with the module to enable + // implicit module import. + SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID); + Module *Mod = Reader.getSubmodule(GlobalSMID); + HFI.isModuleHeader = true; + FileManager &FileMgr = Reader.getFileManager(); + ModuleMap &ModMap = + Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap(); + ModMap.addHeader(Mod, FileMgr.getFile(key.Filename), HFI.getHeaderRole()); + } + } + + assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); + (void)End; + + // This HeaderFileInfo was externally loaded. + HFI.External = true; + return HFI; +} + +void ASTReader::addPendingMacroFromModule(IdentifierInfo *II, + ModuleFile *M, + GlobalMacroID GMacID, + SourceLocation ImportLoc) { + assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard"); + PendingMacroIDs[II].push_back(PendingMacroInfo(M, GMacID, ImportLoc)); +} + +void ASTReader::addPendingMacroFromPCH(IdentifierInfo *II, + ModuleFile *M, + uint64_t MacroDirectivesOffset) { + assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard"); + PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset)); +} + +void ASTReader::ReadDefinedMacros() { + // Note that we are loading defined macros. + Deserializing Macros(this); + + for (ModuleReverseIterator I = ModuleMgr.rbegin(), + E = ModuleMgr.rend(); I != E; ++I) { + BitstreamCursor &MacroCursor = (*I)->MacroCursor; + + // If there was no preprocessor block, skip this file. + if (!MacroCursor.getBitStreamReader()) + continue; + + BitstreamCursor Cursor = MacroCursor; + Cursor.JumpToBit((*I)->MacroStartOffset); + + RecordData Record; + while (true) { + llvm::BitstreamEntry E = Cursor.advanceSkippingSubblocks(); + + switch (E.Kind) { + case llvm::BitstreamEntry::SubBlock: // Handled for us already. + case llvm::BitstreamEntry::Error: + Error("malformed block record in AST file"); + return; + case llvm::BitstreamEntry::EndBlock: + goto NextCursor; + + case llvm::BitstreamEntry::Record: + Record.clear(); + switch (Cursor.readRecord(E.ID, Record)) { + default: // Default behavior: ignore. + break; + + case PP_MACRO_OBJECT_LIKE: + case PP_MACRO_FUNCTION_LIKE: + getLocalIdentifier(**I, Record[0]); + break; + + case PP_TOKEN: + // Ignore tokens. + break; + } + break; + } + } + NextCursor: ; + } +} + +namespace { + /// \brief Visitor class used to look up identifirs in an AST file. + class IdentifierLookupVisitor { + StringRef Name; + unsigned PriorGeneration; + unsigned &NumIdentifierLookups; + unsigned &NumIdentifierLookupHits; + IdentifierInfo *Found; + + public: + IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration, + unsigned &NumIdentifierLookups, + unsigned &NumIdentifierLookupHits) + : Name(Name), PriorGeneration(PriorGeneration), + NumIdentifierLookups(NumIdentifierLookups), + NumIdentifierLookupHits(NumIdentifierLookupHits), + Found() + { + } + + static bool visit(ModuleFile &M, void *UserData) { + IdentifierLookupVisitor *This + = static_cast<IdentifierLookupVisitor *>(UserData); + + // If we've already searched this module file, skip it now. + if (M.Generation <= This->PriorGeneration) + return true; + + ASTIdentifierLookupTable *IdTable + = (ASTIdentifierLookupTable *)M.IdentifierLookupTable; + if (!IdTable) + return false; + + ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), + M, This->Found); + ++This->NumIdentifierLookups; + ASTIdentifierLookupTable::iterator Pos = IdTable->find(This->Name,&Trait); + if (Pos == IdTable->end()) + return false; + + // Dereferencing the iterator has the effect of building the + // IdentifierInfo node and populating it with the various + // declarations it needs. + ++This->NumIdentifierLookupHits; + This->Found = *Pos; + return true; + } + + // \brief Retrieve the identifier info found within the module + // files. + IdentifierInfo *getIdentifierInfo() const { return Found; } + }; +} + +void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) { + // Note that we are loading an identifier. + Deserializing AnIdentifier(this); + + unsigned PriorGeneration = 0; + if (getContext().getLangOpts().Modules) + PriorGeneration = IdentifierGeneration[&II]; + + // If there is a global index, look there first to determine which modules + // provably do not have any results for this identifier. + GlobalModuleIndex::HitSet Hits; + GlobalModuleIndex::HitSet *HitsPtr = 0; + if (!loadGlobalIndex()) { + if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) { + HitsPtr = &Hits; + } + } + + IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration, + NumIdentifierLookups, + NumIdentifierLookupHits); + ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor, HitsPtr); + markIdentifierUpToDate(&II); +} + +void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) { + if (!II) + return; + + II->setOutOfDate(false); + + // Update the generation for this identifier. + if (getContext().getLangOpts().Modules) + IdentifierGeneration[II] = CurrentGeneration; +} + +void ASTReader::resolvePendingMacro(IdentifierInfo *II, + const PendingMacroInfo &PMInfo) { + assert(II); + + if (PMInfo.M->Kind != MK_Module) { + installPCHMacroDirectives(II, *PMInfo.M, + PMInfo.PCHMacroData.MacroDirectivesOffset); + return; + } + + // Module Macro. + + GlobalMacroID GMacID = PMInfo.ModuleMacroData.GMacID; + SourceLocation ImportLoc = + SourceLocation::getFromRawEncoding(PMInfo.ModuleMacroData.ImportLoc); + + assert(GMacID); + // If this macro has already been loaded, don't do so again. + if (MacrosLoaded[GMacID - NUM_PREDEF_MACRO_IDS]) + return; + + MacroInfo *MI = getMacro(GMacID); + SubmoduleID SubModID = MI->getOwningModuleID(); + MacroDirective *MD = PP.AllocateDefMacroDirective(MI, ImportLoc, + /*isImported=*/true); + + // Determine whether this macro definition is visible. + bool Hidden = false; + Module *Owner = 0; + if (SubModID) { + if ((Owner = getSubmodule(SubModID))) { + if (Owner->NameVisibility == Module::Hidden) { + // The owning module is not visible, and this macro definition + // should not be, either. + Hidden = true; + + // Note that this macro definition was hidden because its owning + // module is not yet visible. + HiddenNamesMap[Owner].push_back(HiddenName(II, MD)); + } + } + } + + if (!Hidden) + installImportedMacro(II, MD, Owner); +} + +void ASTReader::installPCHMacroDirectives(IdentifierInfo *II, + ModuleFile &M, uint64_t Offset) { + assert(M.Kind != MK_Module); + + BitstreamCursor &Cursor = M.MacroCursor; + SavedStreamPosition SavedPosition(Cursor); + Cursor.JumpToBit(Offset); + + llvm::BitstreamEntry Entry = + Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd); + if (Entry.Kind != llvm::BitstreamEntry::Record) { + Error("malformed block record in AST file"); + return; + } + + RecordData Record; + PreprocessorRecordTypes RecType = + (PreprocessorRecordTypes)Cursor.readRecord(Entry.ID, Record); + if (RecType != PP_MACRO_DIRECTIVE_HISTORY) { + Error("malformed block record in AST file"); + return; + } + + // Deserialize the macro directives history in reverse source-order. + MacroDirective *Latest = 0, *Earliest = 0; + unsigned Idx = 0, N = Record.size(); + while (Idx < N) { + MacroDirective *MD = 0; + SourceLocation Loc = ReadSourceLocation(M, Record, Idx); + MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++]; + switch (K) { + case MacroDirective::MD_Define: { + GlobalMacroID GMacID = getGlobalMacroID(M, Record[Idx++]); + MacroInfo *MI = getMacro(GMacID); + bool isImported = Record[Idx++]; + bool isAmbiguous = Record[Idx++]; + DefMacroDirective *DefMD = + PP.AllocateDefMacroDirective(MI, Loc, isImported); + DefMD->setAmbiguous(isAmbiguous); + MD = DefMD; + break; + } + case MacroDirective::MD_Undefine: + MD = PP.AllocateUndefMacroDirective(Loc); + break; + case MacroDirective::MD_Visibility: { + bool isPublic = Record[Idx++]; + MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic); + break; + } + } + + if (!Latest) + Latest = MD; + if (Earliest) + Earliest->setPrevious(MD); + Earliest = MD; + } + + PP.setLoadedMacroDirective(II, Latest); +} + +/// \brief For the given macro definitions, check if they are both in system +/// modules. +static bool areDefinedInSystemModules(MacroInfo *PrevMI, MacroInfo *NewMI, + Module *NewOwner, ASTReader &Reader) { + assert(PrevMI && NewMI); + Module *PrevOwner = 0; + if (SubmoduleID PrevModID = PrevMI->getOwningModuleID()) + PrevOwner = Reader.getSubmodule(PrevModID); + SourceManager &SrcMgr = Reader.getSourceManager(); + bool PrevInSystem + = PrevOwner? PrevOwner->IsSystem + : SrcMgr.isInSystemHeader(PrevMI->getDefinitionLoc()); + bool NewInSystem + = NewOwner? NewOwner->IsSystem + : SrcMgr.isInSystemHeader(NewMI->getDefinitionLoc()); + if (PrevOwner && PrevOwner == NewOwner) + return false; + return PrevInSystem && NewInSystem; +} + +void ASTReader::installImportedMacro(IdentifierInfo *II, MacroDirective *MD, + Module *Owner) { + assert(II && MD); + + DefMacroDirective *DefMD = cast<DefMacroDirective>(MD); + MacroDirective *Prev = PP.getMacroDirective(II); + if (Prev) { + MacroDirective::DefInfo PrevDef = Prev->getDefinition(); + MacroInfo *PrevMI = PrevDef.getMacroInfo(); + MacroInfo *NewMI = DefMD->getInfo(); + if (NewMI != PrevMI && !PrevMI->isIdenticalTo(*NewMI, PP, + /*Syntactically=*/true)) { + // Before marking the macros as ambiguous, check if this is a case where + // both macros are in system headers. If so, we trust that the system + // did not get it wrong. This also handles cases where Clang's own + // headers have a different spelling of certain system macros: + // #define LONG_MAX __LONG_MAX__ (clang's limits.h) + // #define LONG_MAX 0x7fffffffffffffffL (system's limits.h) + if (!areDefinedInSystemModules(PrevMI, NewMI, Owner, *this)) { + PrevDef.getDirective()->setAmbiguous(true); + DefMD->setAmbiguous(true); + } + } + } + + PP.appendMacroDirective(II, MD); +} + +InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) { + // If this ID is bogus, just return an empty input file. + if (ID == 0 || ID > F.InputFilesLoaded.size()) + return InputFile(); + + // If we've already loaded this input file, return it. + if (F.InputFilesLoaded[ID-1].getFile()) + return F.InputFilesLoaded[ID-1]; + + // Go find this input file. + BitstreamCursor &Cursor = F.InputFilesCursor; + SavedStreamPosition SavedPosition(Cursor); + Cursor.JumpToBit(F.InputFileOffsets[ID-1]); + + unsigned Code = Cursor.ReadCode(); + RecordData Record; + StringRef Blob; + switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) { + case INPUT_FILE: { + unsigned StoredID = Record[0]; + assert(ID == StoredID && "Bogus stored ID or offset"); + (void)StoredID; + off_t StoredSize = (off_t)Record[1]; + time_t StoredTime = (time_t)Record[2]; + bool Overridden = (bool)Record[3]; + + // Get the file entry for this input file. + StringRef OrigFilename = Blob; + std::string Filename = OrigFilename; + MaybeAddSystemRootToFilename(F, Filename); + const FileEntry *File + = Overridden? FileMgr.getVirtualFile(Filename, StoredSize, StoredTime) + : FileMgr.getFile(Filename, /*OpenFile=*/false); + + // If we didn't find the file, resolve it relative to the + // original directory from which this AST file was created. + if (File == 0 && !F.OriginalDir.empty() && !CurrentDir.empty() && + F.OriginalDir != CurrentDir) { + std::string Resolved = resolveFileRelativeToOriginalDir(Filename, + F.OriginalDir, + CurrentDir); + if (!Resolved.empty()) + File = FileMgr.getFile(Resolved); + } + + // For an overridden file, create a virtual file with the stored + // size/timestamp. + if (Overridden && File == 0) { + File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime); + } + + if (File == 0) { + if (Complain) { + std::string ErrorStr = "could not find file '"; + ErrorStr += Filename; + ErrorStr += "' referenced by AST file"; + Error(ErrorStr.c_str()); + } + return InputFile(); + } + + // Check if there was a request to override the contents of the file + // that was part of the precompiled header. Overridding such a file + // can lead to problems when lexing using the source locations from the + // PCH. + SourceManager &SM = getSourceManager(); + if (!Overridden && SM.isFileOverridden(File)) { + if (Complain) + Error(diag::err_fe_pch_file_overridden, Filename); + // After emitting the diagnostic, recover by disabling the override so + // that the original file will be used. + SM.disableFileContentsOverride(File); + // The FileEntry is a virtual file entry with the size of the contents + // that would override the original contents. Set it to the original's + // size/time. + FileMgr.modifyFileEntry(const_cast<FileEntry*>(File), + StoredSize, StoredTime); + } + + bool IsOutOfDate = false; + + // For an overridden file, there is nothing to validate. + if (!Overridden && (StoredSize != File->getSize() +#if !defined(LLVM_ON_WIN32) + // In our regression testing, the Windows file system seems to + // have inconsistent modification times that sometimes + // erroneously trigger this error-handling path. + || StoredTime != File->getModificationTime() +#endif + )) { + if (Complain) { + Error(diag::err_fe_pch_file_modified, Filename, F.FileName); + if (Context.getLangOpts().Modules && !Diags.isDiagnosticInFlight()) { + Diag(diag::note_module_cache_path) + << PP.getHeaderSearchInfo().getModuleCachePath(); + } + } + + IsOutOfDate = true; + } + + InputFile IF = InputFile(File, Overridden, IsOutOfDate); + + // Note that we've loaded this input file. + F.InputFilesLoaded[ID-1] = IF; + return IF; + } + } + + return InputFile(); +} + +const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) { + ModuleFile &M = ModuleMgr.getPrimaryModule(); + std::string Filename = filenameStrRef; + MaybeAddSystemRootToFilename(M, Filename); + const FileEntry *File = FileMgr.getFile(Filename); + if (File == 0 && !M.OriginalDir.empty() && !CurrentDir.empty() && + M.OriginalDir != CurrentDir) { + std::string resolved = resolveFileRelativeToOriginalDir(Filename, + M.OriginalDir, + CurrentDir); + if (!resolved.empty()) + File = FileMgr.getFile(resolved); + } + + return File; +} + +/// \brief If we are loading a relocatable PCH file, and the filename is +/// not an absolute path, add the system root to the beginning of the file +/// name. +void ASTReader::MaybeAddSystemRootToFilename(ModuleFile &M, + std::string &Filename) { + // If this is not a relocatable PCH file, there's nothing to do. + if (!M.RelocatablePCH) + return; + + if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) + return; + + if (isysroot.empty()) { + // If no system root was given, default to '/' + Filename.insert(Filename.begin(), '/'); + return; + } + + unsigned Length = isysroot.size(); + if (isysroot[Length - 1] != '/') + Filename.insert(Filename.begin(), '/'); + + Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end()); +} + +ASTReader::ASTReadResult +ASTReader::ReadControlBlock(ModuleFile &F, + SmallVectorImpl<ImportedModule> &Loaded, + unsigned ClientLoadCapabilities) { + BitstreamCursor &Stream = F.Stream; + + if (Stream.EnterSubBlock(CONTROL_BLOCK_ID)) { + Error("malformed block record in AST file"); + return Failure; + } + + // Read all of the records and blocks in the control block. + RecordData Record; + while (1) { + llvm::BitstreamEntry Entry = Stream.advance(); + + switch (Entry.Kind) { + case llvm::BitstreamEntry::Error: + Error("malformed block record in AST file"); + return Failure; + case llvm::BitstreamEntry::EndBlock: + // Validate all of the non-system input files. + if (!DisableValidation) { + bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0; + // All user input files reside at the index range [0, Record[1]). + // Record is the one from INPUT_FILE_OFFSETS. + for (unsigned I = 0, N = Record[1]; I < N; ++I) { + InputFile IF = getInputFile(F, I+1, Complain); + if (!IF.getFile() || IF.isOutOfDate()) + return OutOfDate; + } + } + return Success; + + case llvm::BitstreamEntry::SubBlock: + switch (Entry.ID) { + case INPUT_FILES_BLOCK_ID: + F.InputFilesCursor = Stream; + if (Stream.SkipBlock() || // Skip with the main cursor + // Read the abbreviations + ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) { + Error("malformed block record in AST file"); + return Failure; + } + continue; + + default: + if (Stream.SkipBlock()) { + Error("malformed block record in AST file"); + return Failure; + } + continue; + } + + case llvm::BitstreamEntry::Record: + // The interesting case. + break; + } + + // Read and process a record. + Record.clear(); + StringRef Blob; + switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) { + case METADATA: { + if (Record[0] != VERSION_MAJOR && !DisableValidation) { + if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0) + Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old + : diag::warn_pch_version_too_new); + return VersionMismatch; + } + + bool hasErrors = Record[5]; + if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) { + Diag(diag::err_pch_with_compiler_errors); + return HadErrors; + } + + F.RelocatablePCH = Record[4]; + + const std::string &CurBranch = getClangFullRepositoryVersion(); + StringRef ASTBranch = Blob; + if (StringRef(CurBranch) != ASTBranch && !DisableValidation) { + if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0) + Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; + return VersionMismatch; + } + break; + } + + case IMPORTS: { + // Load each of the imported PCH files. + unsigned Idx = 0, N = Record.size(); + while (Idx < N) { + // Read information about the AST file. + ModuleKind ImportedKind = (ModuleKind)Record[Idx++]; + // The import location will be the local one for now; we will adjust + // all import locations of module imports after the global source + // location info are setup. + SourceLocation ImportLoc = + SourceLocation::getFromRawEncoding(Record[Idx++]); + off_t StoredSize = (off_t)Record[Idx++]; + time_t StoredModTime = (time_t)Record[Idx++]; + unsigned Length = Record[Idx++]; + SmallString<128> ImportedFile(Record.begin() + Idx, + Record.begin() + Idx + Length); + Idx += Length; + + // Load the AST file. + switch(ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F, Loaded, + StoredSize, StoredModTime, + ClientLoadCapabilities)) { + case Failure: return Failure; + // If we have to ignore the dependency, we'll have to ignore this too. + case Missing: + case OutOfDate: return OutOfDate; + case VersionMismatch: return VersionMismatch; + case ConfigurationMismatch: return ConfigurationMismatch; + case HadErrors: return HadErrors; + case Success: break; + } + } + break; + } + + case LANGUAGE_OPTIONS: { + bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0; + if (Listener && &F == *ModuleMgr.begin() && + ParseLanguageOptions(Record, Complain, *Listener) && + !DisableValidation) + return ConfigurationMismatch; + break; + } + + case TARGET_OPTIONS: { + bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0; + if (Listener && &F == *ModuleMgr.begin() && + ParseTargetOptions(Record, Complain, *Listener) && + !DisableValidation) + return ConfigurationMismatch; + break; + } + + case DIAGNOSTIC_OPTIONS: { + bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0; + if (Listener && &F == *ModuleMgr.begin() && + ParseDiagnosticOptions(Record, Complain, *Listener) && + !DisableValidation) + return ConfigurationMismatch; + break; + } + + case FILE_SYSTEM_OPTIONS: { + bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0; + if (Listener && &F == *ModuleMgr.begin() && + ParseFileSystemOptions(Record, Complain, *Listener) && + !DisableValidation) + return ConfigurationMismatch; + break; + } + + case HEADER_SEARCH_OPTIONS: { + bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0; + if (Listener && &F == *ModuleMgr.begin() && + ParseHeaderSearchOptions(Record, Complain, *Listener) && + !DisableValidation) + return ConfigurationMismatch; + break; + } + + case PREPROCESSOR_OPTIONS: { + bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch)==0; + if (Listener && &F == *ModuleMgr.begin() && + ParsePreprocessorOptions(Record, Complain, *Listener, + SuggestedPredefines) && + !DisableValidation) + return ConfigurationMismatch; + break; + } + + case ORIGINAL_FILE: + F.OriginalSourceFileID = FileID::get(Record[0]); + F.ActualOriginalSourceFileName = Blob; + F.OriginalSourceFileName = F.ActualOriginalSourceFileName; + MaybeAddSystemRootToFilename(F, F.OriginalSourceFileName); + break; + + case ORIGINAL_FILE_ID: + F.OriginalSourceFileID = FileID::get(Record[0]); + break; + + case ORIGINAL_PCH_DIR: + F.OriginalDir = Blob; + break; + + case INPUT_FILE_OFFSETS: + F.InputFileOffsets = (const uint32_t *)Blob.data(); + F.InputFilesLoaded.resize(Record[0]); + break; + } + } +} + +bool ASTReader::ReadASTBlock(ModuleFile &F) { + BitstreamCursor &Stream = F.Stream; + + if (Stream.EnterSubBlock(AST_BLOCK_ID)) { + Error("malformed block record in AST file"); + return true; + } + + // Read all of the records and blocks for the AST file. + RecordData Record; + while (1) { + llvm::BitstreamEntry Entry = Stream.advance(); + + switch (Entry.Kind) { + case llvm::BitstreamEntry::Error: + Error("error at end of module block in AST file"); + return true; + case llvm::BitstreamEntry::EndBlock: { + // Outside of C++, we do not store a lookup map for the translation unit. + // Instead, mark it as needing a lookup map to be built if this module + // contains any declarations lexically within it (which it always does!). + // This usually has no cost, since we very rarely need the lookup map for + // the translation unit outside C++. + DeclContext *DC = Context.getTranslationUnitDecl(); + if (DC->hasExternalLexicalStorage() && + !getContext().getLangOpts().CPlusPlus) + DC->setMustBuildLookupTable(); + + return false; + } + case llvm::BitstreamEntry::SubBlock: + switch (Entry.ID) { + case DECLTYPES_BLOCK_ID: + // We lazily load the decls block, but we want to set up the + // DeclsCursor cursor to point into it. Clone our current bitcode + // cursor to it, enter the block and read the abbrevs in that block. + // With the main cursor, we just skip over it. + F.DeclsCursor = Stream; + if (Stream.SkipBlock() || // Skip with the main cursor. + // Read the abbrevs. + ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { + Error("malformed block record in AST file"); + return true; + } + break; + + case DECL_UPDATES_BLOCK_ID: + if (Stream.SkipBlock()) { + Error("malformed block record in AST file"); + return true; + } + break; + + case PREPROCESSOR_BLOCK_ID: + F.MacroCursor = Stream; + if (!PP.getExternalSource()) + PP.setExternalSource(this); + + if (Stream.SkipBlock() || + ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { + Error("malformed block record in AST file"); + return true; + } + F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); + break; + + case PREPROCESSOR_DETAIL_BLOCK_ID: + F.PreprocessorDetailCursor = Stream; + if (Stream.SkipBlock() || + ReadBlockAbbrevs(F.PreprocessorDetailCursor, + PREPROCESSOR_DETAIL_BLOCK_ID)) { + Error("malformed preprocessor detail record in AST file"); + return true; + } + F.PreprocessorDetailStartOffset + = F.PreprocessorDetailCursor.GetCurrentBitNo(); + + if (!PP.getPreprocessingRecord()) + PP.createPreprocessingRecord(); + if (!PP.getPreprocessingRecord()->getExternalSource()) + PP.getPreprocessingRecord()->SetExternalSource(*this); + break; + + case SOURCE_MANAGER_BLOCK_ID: + if (ReadSourceManagerBlock(F)) + return true; + break; + + case SUBMODULE_BLOCK_ID: + if (ReadSubmoduleBlock(F)) + return true; + break; + + case COMMENTS_BLOCK_ID: { + BitstreamCursor C = Stream; + if (Stream.SkipBlock() || + ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) { + Error("malformed comments block in AST file"); + return true; + } + CommentsCursors.push_back(std::make_pair(C, &F)); + break; + } + + default: + if (Stream.SkipBlock()) { + Error("malformed block record in AST file"); + return true; + } + break; + } + continue; + + case llvm::BitstreamEntry::Record: + // The interesting case. + break; + } + + // Read and process a record. + Record.clear(); + StringRef Blob; + switch ((ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) { + default: // Default behavior: ignore. + break; + + case TYPE_OFFSET: { + if (F.LocalNumTypes != 0) { + Error("duplicate TYPE_OFFSET record in AST file"); + return true; + } + F.TypeOffsets = (const uint32_t *)Blob.data(); + F.LocalNumTypes = Record[0]; + unsigned LocalBaseTypeIndex = Record[1]; + F.BaseTypeIndex = getTotalNumTypes(); + + if (F.LocalNumTypes > 0) { + // Introduce the global -> local mapping for types within this module. + GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F)); + + // Introduce the local -> global mapping for types within this module. + F.TypeRemap.insertOrReplace( + std::make_pair(LocalBaseTypeIndex, + F.BaseTypeIndex - LocalBaseTypeIndex)); + + TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes); + } + break; + } + + case DECL_OFFSET: { + if (F.LocalNumDecls != 0) { + Error("duplicate DECL_OFFSET record in AST file"); + return true; + } + F.DeclOffsets = (const DeclOffset *)Blob.data(); + F.LocalNumDecls = Record[0]; + unsigned LocalBaseDeclID = Record[1]; + F.BaseDeclID = getTotalNumDecls(); + + if (F.LocalNumDecls > 0) { + // Introduce the global -> local mapping for declarations within this + // module. + GlobalDeclMap.insert( + std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F)); + + // Introduce the local -> global mapping for declarations within this + // module. + F.DeclRemap.insertOrReplace( + std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID)); + + // Introduce the global -> local mapping for declarations within this + // module. + F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID; + + DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls); + } + break; + } + + case TU_UPDATE_LEXICAL: { + DeclContext *TU = Context.getTranslationUnitDecl(); + DeclContextInfo &Info = F.DeclContextInfos[TU]; + Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair *>(Blob.data()); + Info.NumLexicalDecls + = static_cast<unsigned int>(Blob.size() / sizeof(KindDeclIDPair)); + TU->setHasExternalLexicalStorage(true); + break; + } + + case UPDATE_VISIBLE: { + unsigned Idx = 0; + serialization::DeclID ID = ReadDeclID(F, Record, Idx); + ASTDeclContextNameLookupTable *Table = + ASTDeclContextNameLookupTable::Create( + (const unsigned char *)Blob.data() + Record[Idx++], + (const unsigned char *)Blob.data(), + ASTDeclContextNameLookupTrait(*this, F)); + if (ID == PREDEF_DECL_TRANSLATION_UNIT_ID) { // Is it the TU? + DeclContext *TU = Context.getTranslationUnitDecl(); + F.DeclContextInfos[TU].NameLookupTableData = Table; + TU->setHasExternalVisibleStorage(true); + } else + PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F)); + break; + } + + case IDENTIFIER_TABLE: + F.IdentifierTableData = Blob.data(); + if (Record[0]) { + F.IdentifierLookupTable + = ASTIdentifierLookupTable::Create( + (const unsigned char *)F.IdentifierTableData + Record[0], + (const unsigned char *)F.IdentifierTableData, + ASTIdentifierLookupTrait(*this, F)); + + PP.getIdentifierTable().setExternalIdentifierLookup(this); + } + break; + + case IDENTIFIER_OFFSET: { + if (F.LocalNumIdentifiers != 0) { + Error("duplicate IDENTIFIER_OFFSET record in AST file"); + return true; + } + F.IdentifierOffsets = (const uint32_t *)Blob.data(); + F.LocalNumIdentifiers = Record[0]; + unsigned LocalBaseIdentifierID = Record[1]; + F.BaseIdentifierID = getTotalNumIdentifiers(); + + if (F.LocalNumIdentifiers > 0) { + // Introduce the global -> local mapping for identifiers within this + // module. + GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1, + &F)); + + // Introduce the local -> global mapping for identifiers within this + // module. + F.IdentifierRemap.insertOrReplace( + std::make_pair(LocalBaseIdentifierID, + F.BaseIdentifierID - LocalBaseIdentifierID)); + + IdentifiersLoaded.resize(IdentifiersLoaded.size() + + F.LocalNumIdentifiers); + } + break; + } + + case EXTERNAL_DEFINITIONS: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + ExternalDefinitions.push_back(getGlobalDeclID(F, Record[I])); + break; + + case SPECIAL_TYPES: + if (SpecialTypes.empty()) { + for (unsigned I = 0, N = Record.size(); I != N; ++I) + SpecialTypes.push_back(getGlobalTypeID(F, Record[I])); + break; + } + + if (SpecialTypes.size() != Record.size()) { + Error("invalid special-types record"); + return true; + } + + for (unsigned I = 0, N = Record.size(); I != N; ++I) { + serialization::TypeID ID = getGlobalTypeID(F, Record[I]); + if (!SpecialTypes[I]) + SpecialTypes[I] = ID; + // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate + // merge step? + } + break; + + case STATISTICS: + TotalNumStatements += Record[0]; + TotalNumMacros += Record[1]; + TotalLexicalDeclContexts += Record[2]; + TotalVisibleDeclContexts += Record[3]; + break; + + case UNUSED_FILESCOPED_DECLS: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I])); + break; + + case DELEGATING_CTORS: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I])); + break; + + case WEAK_UNDECLARED_IDENTIFIERS: + if (Record.size() % 4 != 0) { + Error("invalid weak identifiers record"); + return true; + } + + // FIXME: Ignore weak undeclared identifiers from non-original PCH + // files. This isn't the way to do it :) + WeakUndeclaredIdentifiers.clear(); + + // Translate the weak, undeclared identifiers into global IDs. + for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) { + WeakUndeclaredIdentifiers.push_back( + getGlobalIdentifierID(F, Record[I++])); + WeakUndeclaredIdentifiers.push_back( + getGlobalIdentifierID(F, Record[I++])); + WeakUndeclaredIdentifiers.push_back( + ReadSourceLocation(F, Record, I).getRawEncoding()); + WeakUndeclaredIdentifiers.push_back(Record[I++]); + } + break; + + case LOCALLY_SCOPED_EXTERN_C_DECLS: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + LocallyScopedExternCDecls.push_back(getGlobalDeclID(F, Record[I])); + break; + + case SELECTOR_OFFSETS: { + F.SelectorOffsets = (const uint32_t *)Blob.data(); + F.LocalNumSelectors = Record[0]; + unsigned LocalBaseSelectorID = Record[1]; + F.BaseSelectorID = getTotalNumSelectors(); + + if (F.LocalNumSelectors > 0) { + // Introduce the global -> local mapping for selectors within this + // module. + GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F)); + + // Introduce the local -> global mapping for selectors within this + // module. + F.SelectorRemap.insertOrReplace( + std::make_pair(LocalBaseSelectorID, + F.BaseSelectorID - LocalBaseSelectorID)); + + SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors); + } + break; + } + + case METHOD_POOL: + F.SelectorLookupTableData = (const unsigned char *)Blob.data(); + if (Record[0]) + F.SelectorLookupTable + = ASTSelectorLookupTable::Create( + F.SelectorLookupTableData + Record[0], + F.SelectorLookupTableData, + ASTSelectorLookupTrait(*this, F)); + TotalNumMethodPoolEntries += Record[1]; + break; + + case REFERENCED_SELECTOR_POOL: + if (!Record.empty()) { + for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) { + ReferencedSelectorsData.push_back(getGlobalSelectorID(F, + Record[Idx++])); + ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx). + getRawEncoding()); + } + } + break; + + case PP_COUNTER_VALUE: + if (!Record.empty() && Listener) + Listener->ReadCounter(F, Record[0]); + break; + + case FILE_SORTED_DECLS: + F.FileSortedDecls = (const DeclID *)Blob.data(); + F.NumFileSortedDecls = Record[0]; + break; + + case SOURCE_LOCATION_OFFSETS: { + F.SLocEntryOffsets = (const uint32_t *)Blob.data(); + F.LocalNumSLocEntries = Record[0]; + unsigned SLocSpaceSize = Record[1]; + llvm::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) = + SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries, + SLocSpaceSize); + // Make our entry in the range map. BaseID is negative and growing, so + // we invert it. Because we invert it, though, we need the other end of + // the range. + unsigned RangeStart = + unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1; + GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F)); + F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset); + + // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing. + assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0); + GlobalSLocOffsetMap.insert( + std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset + - SLocSpaceSize,&F)); + + // Initialize the remapping table. + // Invalid stays invalid. + F.SLocRemap.insert(std::make_pair(0U, 0)); + // This module. Base was 2 when being compiled. + F.SLocRemap.insert(std::make_pair(2U, + static_cast<int>(F.SLocEntryBaseOffset - 2))); + + TotalNumSLocEntries += F.LocalNumSLocEntries; + break; + } + + case MODULE_OFFSET_MAP: { + // Additional remapping information. + const unsigned char *Data = (const unsigned char*)Blob.data(); + const unsigned char *DataEnd = Data + Blob.size(); + + // Continuous range maps we may be updating in our module. + ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder + IdentifierRemap(F.IdentifierRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder + MacroRemap(F.MacroRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder + PreprocessedEntityRemap(F.PreprocessedEntityRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder + SubmoduleRemap(F.SubmoduleRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder + SelectorRemap(F.SelectorRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap); + ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap); + + while(Data < DataEnd) { + uint16_t Len = io::ReadUnalignedLE16(Data); + StringRef Name = StringRef((const char*)Data, Len); + Data += Len; + ModuleFile *OM = ModuleMgr.lookup(Name); + if (!OM) { + Error("SourceLocation remap refers to unknown module"); + return true; + } + + uint32_t SLocOffset = io::ReadUnalignedLE32(Data); + uint32_t IdentifierIDOffset = io::ReadUnalignedLE32(Data); + uint32_t MacroIDOffset = io::ReadUnalignedLE32(Data); + uint32_t PreprocessedEntityIDOffset = io::ReadUnalignedLE32(Data); + uint32_t SubmoduleIDOffset = io::ReadUnalignedLE32(Data); + uint32_t SelectorIDOffset = io::ReadUnalignedLE32(Data); + uint32_t DeclIDOffset = io::ReadUnalignedLE32(Data); + uint32_t TypeIndexOffset = io::ReadUnalignedLE32(Data); + + // Source location offset is mapped to OM->SLocEntryBaseOffset. + SLocRemap.insert(std::make_pair(SLocOffset, + static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset))); + IdentifierRemap.insert( + std::make_pair(IdentifierIDOffset, + OM->BaseIdentifierID - IdentifierIDOffset)); + MacroRemap.insert(std::make_pair(MacroIDOffset, + OM->BaseMacroID - MacroIDOffset)); + PreprocessedEntityRemap.insert( + std::make_pair(PreprocessedEntityIDOffset, + OM->BasePreprocessedEntityID - PreprocessedEntityIDOffset)); + SubmoduleRemap.insert(std::make_pair(SubmoduleIDOffset, + OM->BaseSubmoduleID - SubmoduleIDOffset)); + SelectorRemap.insert(std::make_pair(SelectorIDOffset, + OM->BaseSelectorID - SelectorIDOffset)); + DeclRemap.insert(std::make_pair(DeclIDOffset, + OM->BaseDeclID - DeclIDOffset)); + + TypeRemap.insert(std::make_pair(TypeIndexOffset, + OM->BaseTypeIndex - TypeIndexOffset)); + + // Global -> local mappings. + F.GlobalToLocalDeclIDs[OM] = DeclIDOffset; + } + break; + } + + case SOURCE_MANAGER_LINE_TABLE: + if (ParseLineTable(F, Record)) + return true; + break; + + case SOURCE_LOCATION_PRELOADS: { + // Need to transform from the local view (1-based IDs) to the global view, + // which is based off F.SLocEntryBaseID. + if (!F.PreloadSLocEntries.empty()) { + Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file"); + return true; + } + + F.PreloadSLocEntries.swap(Record); + break; + } + + case EXT_VECTOR_DECLS: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I])); + break; + + case VTABLE_USES: + if (Record.size() % 3 != 0) { + Error("Invalid VTABLE_USES record"); + return true; + } + + // Later tables overwrite earlier ones. + // FIXME: Modules will have some trouble with this. This is clearly not + // the right way to do this. + VTableUses.clear(); + + for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) { + VTableUses.push_back(getGlobalDeclID(F, Record[Idx++])); + VTableUses.push_back( + ReadSourceLocation(F, Record, Idx).getRawEncoding()); + VTableUses.push_back(Record[Idx++]); + } + break; + + case DYNAMIC_CLASSES: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + DynamicClasses.push_back(getGlobalDeclID(F, Record[I])); + break; + + case PENDING_IMPLICIT_INSTANTIATIONS: + if (PendingInstantiations.size() % 2 != 0) { + Error("Invalid existing PendingInstantiations"); + return true; + } + + if (Record.size() % 2 != 0) { + Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block"); + return true; + } + + for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { + PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++])); + PendingInstantiations.push_back( + ReadSourceLocation(F, Record, I).getRawEncoding()); + } + break; + + case SEMA_DECL_REFS: + if (Record.size() != 2) { + Error("Invalid SEMA_DECL_REFS block"); + return true; + } + for (unsigned I = 0, N = Record.size(); I != N; ++I) + SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I])); + break; + + case PPD_ENTITIES_OFFSETS: { + F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data(); + assert(Blob.size() % sizeof(PPEntityOffset) == 0); + F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset); + + unsigned LocalBasePreprocessedEntityID = Record[0]; + + unsigned StartingID; + if (!PP.getPreprocessingRecord()) + PP.createPreprocessingRecord(); + if (!PP.getPreprocessingRecord()->getExternalSource()) + PP.getPreprocessingRecord()->SetExternalSource(*this); + StartingID + = PP.getPreprocessingRecord() + ->allocateLoadedEntities(F.NumPreprocessedEntities); + F.BasePreprocessedEntityID = StartingID; + + if (F.NumPreprocessedEntities > 0) { + // Introduce the global -> local mapping for preprocessed entities in + // this module. + GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F)); + + // Introduce the local -> global mapping for preprocessed entities in + // this module. + F.PreprocessedEntityRemap.insertOrReplace( + std::make_pair(LocalBasePreprocessedEntityID, + F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID)); + } + + break; + } + + case DECL_UPDATE_OFFSETS: { + if (Record.size() % 2 != 0) { + Error("invalid DECL_UPDATE_OFFSETS block in AST file"); + return true; + } + for (unsigned I = 0, N = Record.size(); I != N; I += 2) + DeclUpdateOffsets[getGlobalDeclID(F, Record[I])] + .push_back(std::make_pair(&F, Record[I+1])); + break; + } + + case DECL_REPLACEMENTS: { + if (Record.size() % 3 != 0) { + Error("invalid DECL_REPLACEMENTS block in AST file"); + return true; + } + for (unsigned I = 0, N = Record.size(); I != N; I += 3) + ReplacedDecls[getGlobalDeclID(F, Record[I])] + = ReplacedDeclInfo(&F, Record[I+1], Record[I+2]); + break; + } + + case OBJC_CATEGORIES_MAP: { + if (F.LocalNumObjCCategoriesInMap != 0) { + Error("duplicate OBJC_CATEGORIES_MAP record in AST file"); + return true; + } + + F.LocalNumObjCCategoriesInMap = Record[0]; + F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data(); + break; + } + + case OBJC_CATEGORIES: + F.ObjCCategories.swap(Record); + break; + + case CXX_BASE_SPECIFIER_OFFSETS: { + if (F.LocalNumCXXBaseSpecifiers != 0) { + Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); + return true; + } + + F.LocalNumCXXBaseSpecifiers = Record[0]; + F.CXXBaseSpecifiersOffsets = (const uint32_t *)Blob.data(); + NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers; + break; + } + + case DIAG_PRAGMA_MAPPINGS: + if (F.PragmaDiagMappings.empty()) + F.PragmaDiagMappings.swap(Record); + else + F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(), + Record.begin(), Record.end()); + break; + + case CUDA_SPECIAL_DECL_REFS: + // Later tables overwrite earlier ones. + // FIXME: Modules will have trouble with this. + CUDASpecialDeclRefs.clear(); + for (unsigned I = 0, N = Record.size(); I != N; ++I) + CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I])); + break; + + case HEADER_SEARCH_TABLE: { + F.HeaderFileInfoTableData = Blob.data(); + F.LocalNumHeaderFileInfos = Record[1]; + if (Record[0]) { + F.HeaderFileInfoTable + = HeaderFileInfoLookupTable::Create( + (const unsigned char *)F.HeaderFileInfoTableData + Record[0], + (const unsigned char *)F.HeaderFileInfoTableData, + HeaderFileInfoTrait(*this, F, + &PP.getHeaderSearchInfo(), + Blob.data() + Record[2])); + + PP.getHeaderSearchInfo().SetExternalSource(this); + if (!PP.getHeaderSearchInfo().getExternalLookup()) + PP.getHeaderSearchInfo().SetExternalLookup(this); + } + break; + } + + case FP_PRAGMA_OPTIONS: + // Later tables overwrite earlier ones. + FPPragmaOptions.swap(Record); + break; + + case OPENCL_EXTENSIONS: + // Later tables overwrite earlier ones. + OpenCLExtensions.swap(Record); + break; + + case TENTATIVE_DEFINITIONS: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I])); + break; + + case KNOWN_NAMESPACES: + for (unsigned I = 0, N = Record.size(); I != N; ++I) + KnownNamespaces.push_back(getGlobalDeclID(F, Record[I])); + break; + + case UNDEFINED_BUT_USED: + if (UndefinedButUsed.size() % 2 != 0) { + Error("Invalid existing UndefinedButUsed"); + return true; + } + + if (Record.size() % 2 != 0) { + Error("invalid undefined-but-used record"); + return true; + } + for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { + UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++])); + UndefinedButUsed.push_back( + ReadSourceLocation(F, Record, I).getRawEncoding()); + } + break; + + case IMPORTED_MODULES: { + if (F.Kind != MK_Module) { + // If we aren't loading a module (which has its own exports), make + // all of the imported modules visible. + // FIXME: Deal with macros-only imports. + for (unsigned I = 0, N = Record.size(); I != N; ++I) { + if (unsigned GlobalID = getGlobalSubmoduleID(F, Record[I])) + ImportedModules.push_back(GlobalID); + } + } + break; + } + + case LOCAL_REDECLARATIONS: { + F.RedeclarationChains.swap(Record); + break; + } + + case LOCAL_REDECLARATIONS_MAP: { + if (F.LocalNumRedeclarationsInMap != 0) { + Error("duplicate LOCAL_REDECLARATIONS_MAP record in AST file"); + return true; + } + + F.LocalNumRedeclarationsInMap = Record[0]; + F.RedeclarationsMap = (const LocalRedeclarationsInfo *)Blob.data(); + break; + } + + case MERGED_DECLARATIONS: { + for (unsigned Idx = 0; Idx < Record.size(); /* increment in loop */) { + GlobalDeclID CanonID = getGlobalDeclID(F, Record[Idx++]); + SmallVectorImpl<GlobalDeclID> &Decls = StoredMergedDecls[CanonID]; + for (unsigned N = Record[Idx++]; N > 0; --N) + Decls.push_back(getGlobalDeclID(F, Record[Idx++])); + } + break; + } + + case MACRO_OFFSET: { + if (F.LocalNumMacros != 0) { + Error("duplicate MACRO_OFFSET record in AST file"); + return true; + } + F.MacroOffsets = (const uint32_t *)Blob.data(); + F.LocalNumMacros = Record[0]; + unsigned LocalBaseMacroID = Record[1]; + F.BaseMacroID = getTotalNumMacros(); + + if (F.LocalNumMacros > 0) { + // Introduce the global -> local mapping for macros within this module. + GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F)); + + // Introduce the local -> global mapping for macros within this module. + F.MacroRemap.insertOrReplace( + std::make_pair(LocalBaseMacroID, + F.BaseMacroID - LocalBaseMacroID)); + + MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros); + } + break; + } + + case MACRO_TABLE: { + // FIXME: Not used yet. + break; + } + + case LATE_PARSED_TEMPLATE: { + LateParsedTemplates.append(Record.begin(), Record.end()); + break; + } + } + } +} + +/// \brief Move the given method to the back of the global list of methods. +static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) { + // Find the entry for this selector in the method pool. + Sema::GlobalMethodPool::iterator Known + = S.MethodPool.find(Method->getSelector()); + if (Known == S.MethodPool.end()) + return; + + // Retrieve the appropriate method list. + ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first + : Known->second.second; + bool Found = false; + for (ObjCMethodList *List = &Start; List; List = List->getNext()) { + if (!Found) { + if (List->Method == Method) { + Found = true; + } else { + // Keep searching. + continue; + } + } + + if (List->getNext()) + List->Method = List->getNext()->Method; + else + List->Method = Method; + } +} + +void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) { + for (unsigned I = 0, N = Names.size(); I != N; ++I) { + switch (Names[I].getKind()) { + case HiddenName::Declaration: { + Decl *D = Names[I].getDecl(); + bool wasHidden = D->Hidden; + D->Hidden = false; + + if (wasHidden && SemaObj) { + if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) { + moveMethodToBackOfGlobalList(*SemaObj, Method); + } + } + break; + } + case HiddenName::MacroVisibility: { + std::pair<IdentifierInfo *, MacroDirective *> Macro = Names[I].getMacro(); + installImportedMacro(Macro.first, Macro.second, Owner); + break; + } + } + } +} + +void ASTReader::makeModuleVisible(Module *Mod, + Module::NameVisibilityKind NameVisibility, + SourceLocation ImportLoc, + bool Complain) { + llvm::SmallPtrSet<Module *, 4> Visited; + SmallVector<Module *, 4> Stack; + Stack.push_back(Mod); + while (!Stack.empty()) { + Mod = Stack.pop_back_val(); + + if (NameVisibility <= Mod->NameVisibility) { + // This module already has this level of visibility (or greater), so + // there is nothing more to do. + continue; + } + + if (!Mod->isAvailable()) { + // Modules that aren't available cannot be made visible. + continue; + } + + // Update the module's name visibility. + Mod->NameVisibility = NameVisibility; + + // If we've already deserialized any names from this module, + // mark them as visible. + HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod); + if (Hidden != HiddenNamesMap.end()) { + makeNamesVisible(Hidden->second, Hidden->first); + HiddenNamesMap.erase(Hidden); + } + + // Push any exported modules onto the stack to be marked as visible. + SmallVector<Module *, 16> Exports; + Mod->getExportedModules(Exports); + for (SmallVectorImpl<Module *>::iterator + I = Exports.begin(), E = Exports.end(); I != E; ++I) { + Module *Exported = *I; + if (Visited.insert(Exported)) + Stack.push_back(Exported); + } + + // Detect any conflicts. + if (Complain) { + assert(ImportLoc.isValid() && "Missing import location"); + for (unsigned I = 0, N = Mod->Conflicts.size(); I != N; ++I) { + if (Mod->Conflicts[I].Other->NameVisibility >= NameVisibility) { + Diag(ImportLoc, diag::warn_module_conflict) + << Mod->getFullModuleName() + << Mod->Conflicts[I].Other->getFullModuleName() + << Mod->Conflicts[I].Message; + // FIXME: Need note where the other module was imported. + } + } + } + } +} + +bool ASTReader::loadGlobalIndex() { + if (GlobalIndex) + return false; + + if (TriedLoadingGlobalIndex || !UseGlobalIndex || + !Context.getLangOpts().Modules) + return true; + + // Try to load the global index. + TriedLoadingGlobalIndex = true; + StringRef ModuleCachePath + = getPreprocessor().getHeaderSearchInfo().getModuleCachePath(); + std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result + = GlobalModuleIndex::readIndex(ModuleCachePath); + if (!Result.first) + return true; + + GlobalIndex.reset(Result.first); + ModuleMgr.setGlobalIndex(GlobalIndex.get()); + return false; +} + +bool ASTReader::isGlobalIndexUnavailable() const { + return Context.getLangOpts().Modules && UseGlobalIndex && + !hasGlobalIndex() && TriedLoadingGlobalIndex; +} + +ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, + ModuleKind Type, + SourceLocation ImportLoc, + unsigned ClientLoadCapabilities) { + llvm::SaveAndRestore<SourceLocation> + SetCurImportLocRAII(CurrentImportLoc, ImportLoc); + + // Bump the generation number. + unsigned PreviousGeneration = CurrentGeneration++; + + unsigned NumModules = ModuleMgr.size(); + SmallVector<ImportedModule, 4> Loaded; + switch(ASTReadResult ReadResult = ReadASTCore(FileName, Type, ImportLoc, + /*ImportedBy=*/0, Loaded, + 0, 0, + ClientLoadCapabilities)) { + case Failure: + case Missing: + case OutOfDate: + case VersionMismatch: + case ConfigurationMismatch: + case HadErrors: + ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, ModuleMgr.end(), + Context.getLangOpts().Modules + ? &PP.getHeaderSearchInfo().getModuleMap() + : 0); + + // If we find that any modules are unusable, the global index is going + // to be out-of-date. Just remove it. + GlobalIndex.reset(); + ModuleMgr.setGlobalIndex(0); + return ReadResult; + + case Success: + break; + } + + // Here comes stuff that we only do once the entire chain is loaded. + + // Load the AST blocks of all of the modules that we loaded. + for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(), + MEnd = Loaded.end(); + M != MEnd; ++M) { + ModuleFile &F = *M->Mod; + + // Read the AST block. + if (ReadASTBlock(F)) + return Failure; + + // Once read, set the ModuleFile bit base offset and update the size in + // bits of all files we've seen. + F.GlobalBitOffset = TotalModulesSizeInBits; + TotalModulesSizeInBits += F.SizeInBits; + GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F)); + + // Preload SLocEntries. + for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) { + int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID; + // Load it through the SourceManager and don't call ReadSLocEntry() + // directly because the entry may have already been loaded in which case + // calling ReadSLocEntry() directly would trigger an assertion in + // SourceManager. + SourceMgr.getLoadedSLocEntryByID(Index); + } + } + + // Setup the import locations and notify the module manager that we've + // committed to these module files. + for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(), + MEnd = Loaded.end(); + M != MEnd; ++M) { + ModuleFile &F = *M->Mod; + + ModuleMgr.moduleFileAccepted(&F); + + // Set the import location. + F.DirectImportLoc = ImportLoc; + if (!M->ImportedBy) + F.ImportLoc = M->ImportLoc; + else + F.ImportLoc = ReadSourceLocation(*M->ImportedBy, + M->ImportLoc.getRawEncoding()); + } + + // Mark all of the identifiers in the identifier table as being out of date, + // so that various accessors know to check the loaded modules when the + // identifier is used. + for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(), + IdEnd = PP.getIdentifierTable().end(); + Id != IdEnd; ++Id) + Id->second->setOutOfDate(true); + + // Resolve any unresolved module exports. + for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) { + UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I]; + SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID); + Module *ResolvedMod = getSubmodule(GlobalID); + + switch (Unresolved.Kind) { + case UnresolvedModuleRef::Conflict: + if (ResolvedMod) { + Module::Conflict Conflict; + Conflict.Other = ResolvedMod; + Conflict.Message = Unresolved.String.str(); + Unresolved.Mod->Conflicts.push_back(Conflict); + } + continue; + + case UnresolvedModuleRef::Import: + if (ResolvedMod) + Unresolved.Mod->Imports.push_back(ResolvedMod); + continue; + + case UnresolvedModuleRef::Export: + if (ResolvedMod || Unresolved.IsWildcard) + Unresolved.Mod->Exports.push_back( + Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard)); + continue; + } + } + UnresolvedModuleRefs.clear(); + + // FIXME: How do we load the 'use'd modules? They may not be submodules. + // Might be unnecessary as use declarations are only used to build the + // module itself. + + InitializeContext(); + + if (SemaObj) + UpdateSema(); + + if (DeserializationListener) + DeserializationListener->ReaderInitialized(this); + + ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule(); + if (!PrimaryModule.OriginalSourceFileID.isInvalid()) { + PrimaryModule.OriginalSourceFileID + = FileID::get(PrimaryModule.SLocEntryBaseID + + PrimaryModule.OriginalSourceFileID.getOpaqueValue() - 1); + + // If this AST file is a precompiled preamble, then set the + // preamble file ID of the source manager to the file source file + // from which the preamble was built. + if (Type == MK_Preamble) { + SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID); + } else if (Type == MK_MainFile) { + SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID); + } + } + + // For any Objective-C class definitions we have already loaded, make sure + // that we load any additional categories. + for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) { + loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(), + ObjCClassesLoaded[I], + PreviousGeneration); + } + + return Success; +} + +ASTReader::ASTReadResult +ASTReader::ReadASTCore(StringRef FileName, + ModuleKind Type, + SourceLocation ImportLoc, + ModuleFile *ImportedBy, + SmallVectorImpl<ImportedModule> &Loaded, + off_t ExpectedSize, time_t ExpectedModTime, + unsigned ClientLoadCapabilities) { + ModuleFile *M; + std::string ErrorStr; + ModuleManager::AddModuleResult AddResult + = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy, + CurrentGeneration, ExpectedSize, ExpectedModTime, + M, ErrorStr); + + switch (AddResult) { + case ModuleManager::AlreadyLoaded: + return Success; + + case ModuleManager::NewlyLoaded: + // Load module file below. + break; + + case ModuleManager::Missing: + // The module file was missing; if the client handle handle, that, return + // it. + if (ClientLoadCapabilities & ARR_Missing) + return Missing; + + // Otherwise, return an error. + { + std::string Msg = "Unable to load module \"" + FileName.str() + "\": " + + ErrorStr; + Error(Msg); + } + return Failure; + + case ModuleManager::OutOfDate: + // We couldn't load the module file because it is out-of-date. If the + // client can handle out-of-date, return it. + if (ClientLoadCapabilities & ARR_OutOfDate) + return OutOfDate; + + // Otherwise, return an error. + { + std::string Msg = "Unable to load module \"" + FileName.str() + "\": " + + ErrorStr; + Error(Msg); + } + return Failure; + } + + assert(M && "Missing module file"); + + // FIXME: This seems rather a hack. Should CurrentDir be part of the + // module? + if (FileName != "-") { + CurrentDir = llvm::sys::path::parent_path(FileName); + if (CurrentDir.empty()) CurrentDir = "."; + } + + ModuleFile &F = *M; + BitstreamCursor &Stream = F.Stream; + Stream.init(F.StreamFile); + F.SizeInBits = F.Buffer->getBufferSize() * 8; + + // Sniff for the signature. + if (Stream.Read(8) != 'C' || + Stream.Read(8) != 'P' || + Stream.Read(8) != 'C' || + Stream.Read(8) != 'H') { + Diag(diag::err_not_a_pch_file) << FileName; + return Failure; + } + + // This is used for compatibility with older PCH formats. + bool HaveReadControlBlock = false; + + while (1) { + llvm::BitstreamEntry Entry = Stream.advance(); + + switch (Entry.Kind) { + case llvm::BitstreamEntry::Error: + case llvm::BitstreamEntry::EndBlock: + case llvm::BitstreamEntry::Record: + Error("invalid record at top-level of AST file"); + return Failure; + + case llvm::BitstreamEntry::SubBlock: + break; + } + + // We only know the control subblock ID. + switch (Entry.ID) { + case llvm::bitc::BLOCKINFO_BLOCK_ID: + if (Stream.ReadBlockInfoBlock()) { + Error("malformed BlockInfoBlock in AST file"); + return Failure; + } + break; + case CONTROL_BLOCK_ID: + HaveReadControlBlock = true; + switch (ReadControlBlock(F, Loaded, ClientLoadCapabilities)) { + case Success: + break; + + case Failure: return Failure; + case Missing: return Missing; + case OutOfDate: return OutOfDate; + case VersionMismatch: return VersionMismatch; + case ConfigurationMismatch: return ConfigurationMismatch; + case HadErrors: return HadErrors; + } + break; + case AST_BLOCK_ID: + if (!HaveReadControlBlock) { + if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0) + Diag(diag::warn_pch_version_too_old); + return VersionMismatch; + } + + // Record that we've loaded this module. + Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc)); + return Success; + + default: + if (Stream.SkipBlock()) { + Error("malformed block record in AST file"); + return Failure; + } + break; + } + } + + return Success; +} + +void ASTReader::InitializeContext() { + // If there's a listener, notify them that we "read" the translation unit. + if (DeserializationListener) + DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID, + Context.getTranslationUnitDecl()); + + // Make sure we load the declaration update records for the translation unit, + // if there are any. + loadDeclUpdateRecords(PREDEF_DECL_TRANSLATION_UNIT_ID, + Context.getTranslationUnitDecl()); + + // FIXME: Find a better way to deal with collisions between these + // built-in types. Right now, we just ignore the problem. + + // Load the special types. + if (SpecialTypes.size() >= NumSpecialTypeIDs) { + if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) { + if (!Context.CFConstantStringTypeDecl) + Context.setCFConstantStringType(GetType(String)); + } + + if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { + QualType FileType = GetType(File); + if (FileType.isNull()) { + Error("FILE type is NULL"); + return; + } + + if (!Context.FILEDecl) { + if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) + Context.setFILEDecl(Typedef->getDecl()); + else { + const TagType *Tag = FileType->getAs<TagType>(); + if (!Tag) { + Error("Invalid FILE type in AST file"); + return; + } + Context.setFILEDecl(Tag->getDecl()); + } + } + } + + if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) { + QualType Jmp_bufType = GetType(Jmp_buf); + if (Jmp_bufType.isNull()) { + Error("jmp_buf type is NULL"); + return; + } + + if (!Context.jmp_bufDecl) { + if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) + Context.setjmp_bufDecl(Typedef->getDecl()); + else { + const TagType *Tag = Jmp_bufType->getAs<TagType>(); + if (!Tag) { + Error("Invalid jmp_buf type in AST file"); + return; + } + Context.setjmp_bufDecl(Tag->getDecl()); + } + } + } + + if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) { + QualType Sigjmp_bufType = GetType(Sigjmp_buf); + if (Sigjmp_bufType.isNull()) { + Error("sigjmp_buf type is NULL"); + return; + } + + if (!Context.sigjmp_bufDecl) { + if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) + Context.setsigjmp_bufDecl(Typedef->getDecl()); + else { + const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); + assert(Tag && "Invalid sigjmp_buf type in AST file"); + Context.setsigjmp_bufDecl(Tag->getDecl()); + } + } + } + + if (unsigned ObjCIdRedef + = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) { + if (Context.ObjCIdRedefinitionType.isNull()) + Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef); + } + + if (unsigned ObjCClassRedef + = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) { + if (Context.ObjCClassRedefinitionType.isNull()) + Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef); + } + + if (unsigned ObjCSelRedef + = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) { + if (Context.ObjCSelRedefinitionType.isNull()) + Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef); + } + + if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) { + QualType Ucontext_tType = GetType(Ucontext_t); + if (Ucontext_tType.isNull()) { + Error("ucontext_t type is NULL"); + return; + } + + if (!Context.ucontext_tDecl) { + if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>()) + Context.setucontext_tDecl(Typedef->getDecl()); + else { + const TagType *Tag = Ucontext_tType->getAs<TagType>(); + assert(Tag && "Invalid ucontext_t type in AST file"); + Context.setucontext_tDecl(Tag->getDecl()); + } + } + } + } + + ReadPragmaDiagnosticMappings(Context.getDiagnostics()); + + // If there were any CUDA special declarations, deserialize them. + if (!CUDASpecialDeclRefs.empty()) { + assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); + Context.setcudaConfigureCallDecl( + cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); + } + + // Re-export any modules that were imported by a non-module AST file. + for (unsigned I = 0, N = ImportedModules.size(); I != N; ++I) { + if (Module *Imported = getSubmodule(ImportedModules[I])) + makeModuleVisible(Imported, Module::AllVisible, + /*ImportLoc=*/SourceLocation(), + /*Complain=*/false); + } + ImportedModules.clear(); +} + +void ASTReader::finalizeForWriting() { + for (HiddenNamesMapType::iterator Hidden = HiddenNamesMap.begin(), + HiddenEnd = HiddenNamesMap.end(); + Hidden != HiddenEnd; ++Hidden) { + makeNamesVisible(Hidden->second, Hidden->first); + } + HiddenNamesMap.clear(); +} + +/// \brief Given a cursor at the start of an AST file, scan ahead and drop the +/// cursor into the start of the given block ID, returning false on success and +/// true on failure. +static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) { + while (1) { + llvm::BitstreamEntry Entry = Cursor.advance(); + switch (Entry.Kind) { + case llvm::BitstreamEntry::Error: + case llvm::BitstreamEntry::EndBlock: + return true; + + case llvm::BitstreamEntry::Record: + // Ignore top-level records. + Cursor.skipRecord(Entry.ID); + break; + + case llvm::BitstreamEntry::SubBlock: + if (Entry.ID == BlockID) { + if (Cursor.EnterSubBlock(BlockID)) + return true; + // Found it! + return false; + } + + if (Cursor.SkipBlock()) + return true; + } + } +} + +/// \brief Retrieve the name of the original source file name +/// directly from the AST file, without actually loading the AST +/// file. +std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, + FileManager &FileMgr, + DiagnosticsEngine &Diags) { + // Open the AST file. + std::string ErrStr; + OwningPtr<llvm::MemoryBuffer> Buffer; + Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); + if (!Buffer) { + Diags.Report(diag::err_fe_unable_to_read_pch_file) << ASTFileName << ErrStr; + return std::string(); + } + + // Initialize the stream + llvm::BitstreamReader StreamFile; + BitstreamCursor Stream; + StreamFile.init((const unsigned char *)Buffer->getBufferStart(), + (const unsigned char *)Buffer->getBufferEnd()); + Stream.init(StreamFile); + + // Sniff for the signature. + if (Stream.Read(8) != 'C' || + Stream.Read(8) != 'P' || + Stream.Read(8) != 'C' || + Stream.Read(8) != 'H') { + Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; + return std::string(); + } + + // Scan for the CONTROL_BLOCK_ID block. + if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) { + Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; + return std::string(); + } + + // Scan for ORIGINAL_FILE inside the control block. + RecordData Record; + while (1) { + llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); + if (Entry.Kind == llvm::BitstreamEntry::EndBlock) + return std::string(); + + if (Entry.Kind != llvm::BitstreamEntry::Record) { + Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; + return std::string(); + } + + Record.clear(); + StringRef Blob; + if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE) + return Blob.str(); + } +} + +namespace { + class SimplePCHValidator : public ASTReaderListener { + const LangOptions &ExistingLangOpts; + const TargetOptions &ExistingTargetOpts; + const PreprocessorOptions &ExistingPPOpts; + FileManager &FileMgr; + + public: + SimplePCHValidator(const LangOptions &ExistingLangOpts, + const TargetOptions &ExistingTargetOpts, + const PreprocessorOptions &ExistingPPOpts, + FileManager &FileMgr) + : ExistingLangOpts(ExistingLangOpts), + ExistingTargetOpts(ExistingTargetOpts), + ExistingPPOpts(ExistingPPOpts), + FileMgr(FileMgr) + { + } + + virtual bool ReadLanguageOptions(const LangOptions &LangOpts, + bool Complain) { + return checkLanguageOptions(ExistingLangOpts, LangOpts, 0); + } + virtual bool ReadTargetOptions(const TargetOptions &TargetOpts, + bool Complain) { + return checkTargetOptions(ExistingTargetOpts, TargetOpts, 0); + } + virtual bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts, + bool Complain, + std::string &SuggestedPredefines) { + return checkPreprocessorOptions(ExistingPPOpts, PPOpts, 0, FileMgr, + SuggestedPredefines, ExistingLangOpts); + } + }; +} + +bool ASTReader::readASTFileControlBlock(StringRef Filename, + FileManager &FileMgr, + ASTReaderListener &Listener) { + // Open the AST file. + std::string ErrStr; + OwningPtr<llvm::MemoryBuffer> Buffer; + Buffer.reset(FileMgr.getBufferForFile(Filename, &ErrStr)); + if (!Buffer) { + return true; + } + + // Initialize the stream + llvm::BitstreamReader StreamFile; + BitstreamCursor Stream; + StreamFile.init((const unsigned char *)Buffer->getBufferStart(), + (const unsigned char *)Buffer->getBufferEnd()); + Stream.init(StreamFile); + + // Sniff for the signature. + if (Stream.Read(8) != 'C' || + Stream.Read(8) != 'P' || + Stream.Read(8) != 'C' || + Stream.Read(8) != 'H') { + return true; + } + + // Scan for the CONTROL_BLOCK_ID block. + if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) + return true; + + bool NeedsInputFiles = Listener.needsInputFileVisitation(); + BitstreamCursor InputFilesCursor; + if (NeedsInputFiles) { + InputFilesCursor = Stream; + if (SkipCursorToBlock(InputFilesCursor, INPUT_FILES_BLOCK_ID)) + return true; + + // Read the abbreviations + while (true) { + uint64_t Offset = InputFilesCursor.GetCurrentBitNo(); + unsigned Code = InputFilesCursor.ReadCode(); + + // We expect all abbrevs to be at the start of the block. + if (Code != llvm::bitc::DEFINE_ABBREV) { + InputFilesCursor.JumpToBit(Offset); + break; + } + InputFilesCursor.ReadAbbrevRecord(); + } + } + + // Scan for ORIGINAL_FILE inside the control block. + RecordData Record; + while (1) { + llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); + if (Entry.Kind == llvm::BitstreamEntry::EndBlock) + return false; + + if (Entry.Kind != llvm::BitstreamEntry::Record) + return true; + + Record.clear(); + StringRef Blob; + unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob); + switch ((ControlRecordTypes)RecCode) { + case METADATA: { + if (Record[0] != VERSION_MAJOR) + return true; + + if (Listener.ReadFullVersionInformation(Blob)) + return true; + + break; + } + case LANGUAGE_OPTIONS: + if (ParseLanguageOptions(Record, false, Listener)) + return true; + break; + + case TARGET_OPTIONS: + if (ParseTargetOptions(Record, false, Listener)) + return true; + break; + + case DIAGNOSTIC_OPTIONS: + if (ParseDiagnosticOptions(Record, false, Listener)) + return true; + break; + + case FILE_SYSTEM_OPTIONS: + if (ParseFileSystemOptions(Record, false, Listener)) + return true; + break; + + case HEADER_SEARCH_OPTIONS: + if (ParseHeaderSearchOptions(Record, false, Listener)) + return true; + break; + + case PREPROCESSOR_OPTIONS: { + std::string IgnoredSuggestedPredefines; + if (ParsePreprocessorOptions(Record, false, Listener, + IgnoredSuggestedPredefines)) + return true; + break; + } + + case INPUT_FILE_OFFSETS: { + if (!NeedsInputFiles) + break; + + unsigned NumInputFiles = Record[0]; + unsigned NumUserFiles = Record[1]; + const uint32_t *InputFileOffs = (const uint32_t *)Blob.data(); + for (unsigned I = 0; I != NumInputFiles; ++I) { + // Go find this input file. + bool isSystemFile = I >= NumUserFiles; + BitstreamCursor &Cursor = InputFilesCursor; + SavedStreamPosition SavedPosition(Cursor); + Cursor.JumpToBit(InputFileOffs[I]); + + unsigned Code = Cursor.ReadCode(); + RecordData Record; + StringRef Blob; + bool shouldContinue = false; + switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) { + case INPUT_FILE: + shouldContinue = Listener.visitInputFile(Blob, isSystemFile); + break; + } + if (!shouldContinue) + break; + } + break; + } + + default: + // No other validation to perform. + break; + } + } +} + + +bool ASTReader::isAcceptableASTFile(StringRef Filename, + FileManager &FileMgr, + const LangOptions &LangOpts, + const TargetOptions &TargetOpts, + const PreprocessorOptions &PPOpts) { + SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts, FileMgr); + return !readASTFileControlBlock(Filename, FileMgr, validator); +} + +bool ASTReader::ReadSubmoduleBlock(ModuleFile &F) { + // Enter the submodule block. + if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) { + Error("malformed submodule block record in AST file"); + return true; + } + + ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap(); + bool First = true; + Module *CurrentModule = 0; + RecordData Record; + while (true) { + llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks(); + + switch (Entry.Kind) { + case llvm::BitstreamEntry::SubBlock: // Handled for us already. + case llvm::BitstreamEntry::Error: + Error("malformed block record in AST file"); + return true; + case llvm::BitstreamEntry::EndBlock: + return false; + case llvm::BitstreamEntry::Record: + // The interesting case. + break; + } + + // Read a record. + StringRef Blob; + Record.clear(); + switch (F.Stream.readRecord(Entry.ID, Record, &Blob)) { + default: // Default behavior: ignore. + break; + + case SUBMODULE_DEFINITION: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (Record.size() < 8) { + Error("malformed module definition"); + return true; + } + + StringRef Name = Blob; + SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[0]); + SubmoduleID Parent = getGlobalSubmoduleID(F, Record[1]); + bool IsFramework = Record[2]; + bool IsExplicit = Record[3]; + bool IsSystem = Record[4]; + bool InferSubmodules = Record[5]; + bool InferExplicitSubmodules = Record[6]; + bool InferExportWildcard = Record[7]; + bool ConfigMacrosExhaustive = Record[8]; + + Module *ParentModule = 0; + if (Parent) + ParentModule = getSubmodule(Parent); + + // Retrieve this (sub)module from the module map, creating it if + // necessary. + CurrentModule = ModMap.findOrCreateModule(Name, ParentModule, + IsFramework, + IsExplicit).first; + SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS; + if (GlobalIndex >= SubmodulesLoaded.size() || + SubmodulesLoaded[GlobalIndex]) { + Error("too many submodules"); + return true; + } + + if (!ParentModule) { + if (const FileEntry *CurFile = CurrentModule->getASTFile()) { + if (CurFile != F.File) { + if (!Diags.isDiagnosticInFlight()) { + Diag(diag::err_module_file_conflict) + << CurrentModule->getTopLevelModuleName() + << CurFile->getName() + << F.File->getName(); + } + return true; + } + } + + CurrentModule->setASTFile(F.File); + } + + CurrentModule->IsFromModuleFile = true; + CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem; + CurrentModule->InferSubmodules = InferSubmodules; + CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules; + CurrentModule->InferExportWildcard = InferExportWildcard; + CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive; + if (DeserializationListener) + DeserializationListener->ModuleRead(GlobalID, CurrentModule); + + SubmodulesLoaded[GlobalIndex] = CurrentModule; + + // Clear out data that will be replaced by what is the module file. + CurrentModule->LinkLibraries.clear(); + CurrentModule->ConfigMacros.clear(); + CurrentModule->UnresolvedConflicts.clear(); + CurrentModule->Conflicts.clear(); + break; + } + + case SUBMODULE_UMBRELLA_HEADER: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + if (const FileEntry *Umbrella = PP.getFileManager().getFile(Blob)) { + if (!CurrentModule->getUmbrellaHeader()) + ModMap.setUmbrellaHeader(CurrentModule, Umbrella); + else if (CurrentModule->getUmbrellaHeader() != Umbrella) { + Error("mismatched umbrella headers in submodule"); + return true; + } + } + break; + } + + case SUBMODULE_HEADER: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + // We lazily associate headers with their modules via the HeaderInfoTable. + // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead + // of complete filenames or remove it entirely. + break; + } + + case SUBMODULE_EXCLUDED_HEADER: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + // We lazily associate headers with their modules via the HeaderInfoTable. + // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead + // of complete filenames or remove it entirely. + break; + } + + case SUBMODULE_PRIVATE_HEADER: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + // We lazily associate headers with their modules via the HeaderInfoTable. + // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead + // of complete filenames or remove it entirely. + break; + } + + case SUBMODULE_TOPHEADER: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + CurrentModule->addTopHeaderFilename(Blob); + break; + } + + case SUBMODULE_UMBRELLA_DIR: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + if (const DirectoryEntry *Umbrella + = PP.getFileManager().getDirectory(Blob)) { + if (!CurrentModule->getUmbrellaDir()) + ModMap.setUmbrellaDir(CurrentModule, Umbrella); + else if (CurrentModule->getUmbrellaDir() != Umbrella) { + Error("mismatched umbrella directories in submodule"); + return true; + } + } + break; + } + + case SUBMODULE_METADATA: { + if (!First) { + Error("submodule metadata record not at beginning of block"); + return true; + } + First = false; + + F.BaseSubmoduleID = getTotalNumSubmodules(); + F.LocalNumSubmodules = Record[0]; + unsigned LocalBaseSubmoduleID = Record[1]; + if (F.LocalNumSubmodules > 0) { + // Introduce the global -> local mapping for submodules within this + // module. + GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F)); + + // Introduce the local -> global mapping for submodules within this + // module. + F.SubmoduleRemap.insertOrReplace( + std::make_pair(LocalBaseSubmoduleID, + F.BaseSubmoduleID - LocalBaseSubmoduleID)); + + SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules); + } + break; + } + + case SUBMODULE_IMPORTS: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + for (unsigned Idx = 0; Idx != Record.size(); ++Idx) { + UnresolvedModuleRef Unresolved; + Unresolved.File = &F; + Unresolved.Mod = CurrentModule; + Unresolved.ID = Record[Idx]; + Unresolved.Kind = UnresolvedModuleRef::Import; + Unresolved.IsWildcard = false; + UnresolvedModuleRefs.push_back(Unresolved); + } + break; + } + + case SUBMODULE_EXPORTS: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) { + UnresolvedModuleRef Unresolved; + Unresolved.File = &F; + Unresolved.Mod = CurrentModule; + Unresolved.ID = Record[Idx]; + Unresolved.Kind = UnresolvedModuleRef::Export; + Unresolved.IsWildcard = Record[Idx + 1]; + UnresolvedModuleRefs.push_back(Unresolved); + } + + // Once we've loaded the set of exports, there's no reason to keep + // the parsed, unresolved exports around. + CurrentModule->UnresolvedExports.clear(); + break; + } + case SUBMODULE_REQUIRES: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + CurrentModule->addRequirement(Blob, Record[0], Context.getLangOpts(), + Context.getTargetInfo()); + break; + } + + case SUBMODULE_LINK_LIBRARY: + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + CurrentModule->LinkLibraries.push_back( + Module::LinkLibrary(Blob, Record[0])); + break; + + case SUBMODULE_CONFIG_MACRO: + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + CurrentModule->ConfigMacros.push_back(Blob.str()); + break; + + case SUBMODULE_CONFLICT: { + if (First) { + Error("missing submodule metadata record at beginning of block"); + return true; + } + + if (!CurrentModule) + break; + + UnresolvedModuleRef Unresolved; + Unresolved.File = &F; + Unresolved.Mod = CurrentModule; + Unresolved.ID = Record[0]; + Unresolved.Kind = UnresolvedModuleRef::Conflict; + Unresolved.IsWildcard = false; + Unresolved.String = Blob; + UnresolvedModuleRefs.push_back(Unresolved); + break; + } + } + } +} + +/// \brief Parse the record that corresponds to a LangOptions data +/// structure. +/// +/// This routine parses the language options from the AST file and then gives +/// them to the AST listener if one is set. +/// +/// \returns true if the listener deems the file unacceptable, false otherwise. +bool ASTReader::ParseLanguageOptions(const RecordData &Record, + bool Complain, + ASTReaderListener &Listener) { + LangOptions LangOpts; + unsigned Idx = 0; +#define LANGOPT(Name, Bits, Default, Description) \ + LangOpts.Name = Record[Idx++]; +#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ + LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++])); +#include "clang/Basic/LangOptions.def" +#define SANITIZER(NAME, ID) LangOpts.Sanitize.ID = Record[Idx++]; +#include "clang/Basic/Sanitizers.def" + + ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++]; + VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx); + LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion); + + unsigned Length = Record[Idx++]; + LangOpts.CurrentModule.assign(Record.begin() + Idx, + Record.begin() + Idx + Length); + + Idx += Length; + + // Comment options. + for (unsigned N = Record[Idx++]; N; --N) { + LangOpts.CommentOpts.BlockCommandNames.push_back( + ReadString(Record, Idx)); + } + LangOpts.CommentOpts.ParseAllComments = Record[Idx++]; + + return Listener.ReadLanguageOptions(LangOpts, Complain); +} + +bool ASTReader::ParseTargetOptions(const RecordData &Record, + bool Complain, + ASTReaderListener &Listener) { + unsigned Idx = 0; + TargetOptions TargetOpts; + TargetOpts.Triple = ReadString(Record, Idx); + TargetOpts.CPU = ReadString(Record, Idx); + TargetOpts.ABI = ReadString(Record, Idx); + TargetOpts.CXXABI = ReadString(Record, Idx); + TargetOpts.LinkerVersion = ReadString(Record, Idx); + for (unsigned N = Record[Idx++]; N; --N) { + TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx)); + } + for (unsigned N = Record[Idx++]; N; --N) { + TargetOpts.Features.push_back(ReadString(Record, Idx)); + } + + return Listener.ReadTargetOptions(TargetOpts, Complain); +} + +bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain, + ASTReaderListener &Listener) { + DiagnosticOptions DiagOpts; + unsigned Idx = 0; +#define DIAGOPT(Name, Bits, Default) DiagOpts.Name = Record[Idx++]; +#define ENUM_DIAGOPT(Name, Type, Bits, Default) \ + DiagOpts.set##Name(static_cast<Type>(Record[Idx++])); +#include "clang/Basic/DiagnosticOptions.def" + + for (unsigned N = Record[Idx++]; N; --N) { + DiagOpts.Warnings.push_back(ReadString(Record, Idx)); + } + + return Listener.ReadDiagnosticOptions(DiagOpts, Complain); +} + +bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain, + ASTReaderListener &Listener) { + FileSystemOptions FSOpts; + unsigned Idx = 0; + FSOpts.WorkingDir = ReadString(Record, Idx); + return Listener.ReadFileSystemOptions(FSOpts, Complain); +} + +bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record, + bool Complain, + ASTReaderListener &Listener) { + HeaderSearchOptions HSOpts; + unsigned Idx = 0; + HSOpts.Sysroot = ReadString(Record, Idx); + + // Include entries. + for (unsigned N = Record[Idx++]; N; --N) { + std::string Path = ReadString(Record, Idx); + frontend::IncludeDirGroup Group + = static_cast<frontend::IncludeDirGroup>(Record[Idx++]); + bool IsFramework = Record[Idx++]; + bool IgnoreSysRoot = Record[Idx++]; + HSOpts.UserEntries.push_back( + HeaderSearchOptions::Entry(Path, Group, IsFramework, IgnoreSysRoot)); + } + + // System header prefixes. + for (unsigned N = Record[Idx++]; N; --N) { + std::string Prefix = ReadString(Record, Idx); + bool IsSystemHeader = Record[Idx++]; + HSOpts.SystemHeaderPrefixes.push_back( + HeaderSearchOptions::SystemHeaderPrefix(Prefix, IsSystemHeader)); + } + + HSOpts.ResourceDir = ReadString(Record, Idx); + HSOpts.ModuleCachePath = ReadString(Record, Idx); + HSOpts.DisableModuleHash = Record[Idx++]; + HSOpts.UseBuiltinIncludes = Record[Idx++]; + HSOpts.UseStandardSystemIncludes = Record[Idx++]; + HSOpts.UseStandardCXXIncludes = Record[Idx++]; + HSOpts.UseLibcxx = Record[Idx++]; + + return Listener.ReadHeaderSearchOptions(HSOpts, Complain); +} + +bool ASTReader::ParsePreprocessorOptions(const RecordData &Record, + bool Complain, + ASTReaderListener &Listener, + std::string &SuggestedPredefines) { + PreprocessorOptions PPOpts; + unsigned Idx = 0; + + // Macro definitions/undefs + for (unsigned N = Record[Idx++]; N; --N) { + std::string Macro = ReadString(Record, Idx); + bool IsUndef = Record[Idx++]; + PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef)); + } + + // Includes + for (unsigned N = Record[Idx++]; N; --N) { + PPOpts.Includes.push_back(ReadString(Record, Idx)); + } + + // Macro Includes + for (unsigned N = Record[Idx++]; N; --N) { + PPOpts.MacroIncludes.push_back(ReadString(Record, Idx)); + } + + PPOpts.UsePredefines = Record[Idx++]; + PPOpts.DetailedRecord = Record[Idx++]; + PPOpts.ImplicitPCHInclude = ReadString(Record, Idx); + PPOpts.ImplicitPTHInclude = ReadString(Record, Idx); + PPOpts.ObjCXXARCStandardLibrary = + static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]); + SuggestedPredefines.clear(); + return Listener.ReadPreprocessorOptions(PPOpts, Complain, + SuggestedPredefines); +} + +std::pair<ModuleFile *, unsigned> +ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) { + GlobalPreprocessedEntityMapType::iterator + I = GlobalPreprocessedEntityMap.find(GlobalIndex); + assert(I != GlobalPreprocessedEntityMap.end() && + "Corrupted global preprocessed entity map"); + ModuleFile *M = I->second; + unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID; + return std::make_pair(M, LocalIndex); +} + +std::pair<PreprocessingRecord::iterator, PreprocessingRecord::iterator> +ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const { + if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord()) + return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID, + Mod.NumPreprocessedEntities); + + return std::make_pair(PreprocessingRecord::iterator(), + PreprocessingRecord::iterator()); +} + +std::pair<ASTReader::ModuleDeclIterator, ASTReader::ModuleDeclIterator> +ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) { + return std::make_pair(ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls), + ModuleDeclIterator(this, &Mod, + Mod.FileSortedDecls + Mod.NumFileSortedDecls)); +} + +PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) { + PreprocessedEntityID PPID = Index+1; + std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index); + ModuleFile &M = *PPInfo.first; + unsigned LocalIndex = PPInfo.second; + const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex]; + + if (!PP.getPreprocessingRecord()) { + Error("no preprocessing record"); + return 0; + } + + SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor); + M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset); + + llvm::BitstreamEntry Entry = + M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd); + if (Entry.Kind != llvm::BitstreamEntry::Record) + return 0; + + // Read the record. + SourceRange Range(ReadSourceLocation(M, PPOffs.Begin), + ReadSourceLocation(M, PPOffs.End)); + PreprocessingRecord &PPRec = *PP.getPreprocessingRecord(); + StringRef Blob; + RecordData Record; + PreprocessorDetailRecordTypes RecType = + (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord( + Entry.ID, Record, &Blob); + switch (RecType) { + case PPD_MACRO_EXPANSION: { + bool isBuiltin = Record[0]; + IdentifierInfo *Name = 0; + MacroDefinition *Def = 0; + if (isBuiltin) + Name = getLocalIdentifier(M, Record[1]); + else { + PreprocessedEntityID + GlobalID = getGlobalPreprocessedEntityID(M, Record[1]); + Def =cast<MacroDefinition>(PPRec.getLoadedPreprocessedEntity(GlobalID-1)); + } + + MacroExpansion *ME; + if (isBuiltin) + ME = new (PPRec) MacroExpansion(Name, Range); + else + ME = new (PPRec) MacroExpansion(Def, Range); + + return ME; + } + + case PPD_MACRO_DEFINITION: { + // Decode the identifier info and then check again; if the macro is + // still defined and associated with the identifier, + IdentifierInfo *II = getLocalIdentifier(M, Record[0]); + MacroDefinition *MD + = new (PPRec) MacroDefinition(II, Range); + + if (DeserializationListener) + DeserializationListener->MacroDefinitionRead(PPID, MD); + + return MD; + } + + case PPD_INCLUSION_DIRECTIVE: { + const char *FullFileNameStart = Blob.data() + Record[0]; + StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]); + const FileEntry *File = 0; + if (!FullFileName.empty()) + File = PP.getFileManager().getFile(FullFileName); + + // FIXME: Stable encoding + InclusionDirective::InclusionKind Kind + = static_cast<InclusionDirective::InclusionKind>(Record[2]); + InclusionDirective *ID + = new (PPRec) InclusionDirective(PPRec, Kind, + StringRef(Blob.data(), Record[0]), + Record[1], Record[3], + File, + Range); + return ID; + } + } + + llvm_unreachable("Invalid PreprocessorDetailRecordTypes"); +} + +/// \brief \arg SLocMapI points at a chunk of a module that contains no +/// preprocessed entities or the entities it contains are not the ones we are +/// looking for. Find the next module that contains entities and return the ID +/// of the first entry. +PreprocessedEntityID ASTReader::findNextPreprocessedEntity( + GlobalSLocOffsetMapType::const_iterator SLocMapI) const { + ++SLocMapI; + for (GlobalSLocOffsetMapType::const_iterator + EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) { + ModuleFile &M = *SLocMapI->second; + if (M.NumPreprocessedEntities) + return M.BasePreprocessedEntityID; + } + + return getTotalNumPreprocessedEntities(); +} + +namespace { + +template <unsigned PPEntityOffset::*PPLoc> +struct PPEntityComp { + const ASTReader &Reader; + ModuleFile &M; + + PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) { } + + bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const { + SourceLocation LHS = getLoc(L); + SourceLocation RHS = getLoc(R); + return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); + } + + bool operator()(const PPEntityOffset &L, SourceLocation RHS) const { + SourceLocation LHS = getLoc(L); + return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); + } + + bool operator()(SourceLocation LHS, const PPEntityOffset &R) const { + SourceLocation RHS = getLoc(R); + return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); + } + + SourceLocation getLoc(const PPEntityOffset &PPE) const { + return Reader.ReadSourceLocation(M, PPE.*PPLoc); + } +}; + +} + +/// \brief Returns the first preprocessed entity ID that ends after \arg BLoc. +PreprocessedEntityID +ASTReader::findBeginPreprocessedEntity(SourceLocation BLoc) const { + if (SourceMgr.isLocalSourceLocation(BLoc)) + return getTotalNumPreprocessedEntities(); + + GlobalSLocOffsetMapType::const_iterator + SLocMapI = GlobalSLocOffsetMap.find(SourceManager::MaxLoadedOffset - + BLoc.getOffset() - 1); + assert(SLocMapI != GlobalSLocOffsetMap.end() && + "Corrupted global sloc offset map"); + + if (SLocMapI->second->NumPreprocessedEntities == 0) + return findNextPreprocessedEntity(SLocMapI); + + ModuleFile &M = *SLocMapI->second; + typedef const PPEntityOffset *pp_iterator; + pp_iterator pp_begin = M.PreprocessedEntityOffsets; + pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities; + + size_t Count = M.NumPreprocessedEntities; + size_t Half; + pp_iterator First = pp_begin; + pp_iterator PPI; + + // Do a binary search manually instead of using std::lower_bound because + // The end locations of entities may be unordered (when a macro expansion + // is inside another macro argument), but for this case it is not important + // whether we get the first macro expansion or its containing macro. + while (Count > 0) { + Half = Count/2; + PPI = First; + std::advance(PPI, Half); + if (SourceMgr.isBeforeInTranslationUnit(ReadSourceLocation(M, PPI->End), + BLoc)){ + First = PPI; + ++First; + Count = Count - Half - 1; + } else + Count = Half; + } + + if (PPI == pp_end) + return findNextPreprocessedEntity(SLocMapI); + + return M.BasePreprocessedEntityID + (PPI - pp_begin); +} + +/// \brief Returns the first preprocessed entity ID that begins after \arg ELoc. +PreprocessedEntityID +ASTReader::findEndPreprocessedEntity(SourceLocation ELoc) const { + if (SourceMgr.isLocalSourceLocation(ELoc)) + return getTotalNumPreprocessedEntities(); + + GlobalSLocOffsetMapType::const_iterator + SLocMapI = GlobalSLocOffsetMap.find(SourceManager::MaxLoadedOffset - + ELoc.getOffset() - 1); + assert(SLocMapI != GlobalSLocOffsetMap.end() && + "Corrupted global sloc offset map"); + + if (SLocMapI->second->NumPreprocessedEntities == 0) + return findNextPreprocessedEntity(SLocMapI); + + ModuleFile &M = *SLocMapI->second; + typedef const PPEntityOffset *pp_iterator; + pp_iterator pp_begin = M.PreprocessedEntityOffsets; + pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities; + pp_iterator PPI = + std::upper_bound(pp_begin, pp_end, ELoc, + PPEntityComp<&PPEntityOffset::Begin>(*this, M)); + + if (PPI == pp_end) + return findNextPreprocessedEntity(SLocMapI); + + return M.BasePreprocessedEntityID + (PPI - pp_begin); +} + +/// \brief Returns a pair of [Begin, End) indices of preallocated +/// preprocessed entities that \arg Range encompasses. +std::pair<unsigned, unsigned> + ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) { + if (Range.isInvalid()) + return std::make_pair(0,0); + assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin())); + + PreprocessedEntityID BeginID = findBeginPreprocessedEntity(Range.getBegin()); + PreprocessedEntityID EndID = findEndPreprocessedEntity(Range.getEnd()); + return std::make_pair(BeginID, EndID); +} + +/// \brief Optionally returns true or false if the preallocated preprocessed +/// entity with index \arg Index came from file \arg FID. +Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index, + FileID FID) { + if (FID.isInvalid()) + return false; + + std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index); + ModuleFile &M = *PPInfo.first; + unsigned LocalIndex = PPInfo.second; + const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex]; + + SourceLocation Loc = ReadSourceLocation(M, PPOffs.Begin); + if (Loc.isInvalid()) + return false; + + if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID)) + return true; + else + return false; +} + +namespace { + /// \brief Visitor used to search for information about a header file. + class HeaderFileInfoVisitor { + const FileEntry *FE; + + Optional<HeaderFileInfo> HFI; + + public: + explicit HeaderFileInfoVisitor(const FileEntry *FE) + : FE(FE) { } + + static bool visit(ModuleFile &M, void *UserData) { + HeaderFileInfoVisitor *This + = static_cast<HeaderFileInfoVisitor *>(UserData); + + HeaderFileInfoLookupTable *Table + = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable); + if (!Table) + return false; + + // Look in the on-disk hash table for an entry for this file name. + HeaderFileInfoLookupTable::iterator Pos = Table->find(This->FE); + if (Pos == Table->end()) + return false; + + This->HFI = *Pos; + return true; + } + + Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; } + }; +} + +HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { + HeaderFileInfoVisitor Visitor(FE); + ModuleMgr.visit(&HeaderFileInfoVisitor::visit, &Visitor); + if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo()) + return *HFI; + + return HeaderFileInfo(); +} + +void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) { + // FIXME: Make it work properly with modules. + SmallVector<DiagnosticsEngine::DiagState *, 32> DiagStates; + for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { + ModuleFile &F = *(*I); + unsigned Idx = 0; + DiagStates.clear(); + assert(!Diag.DiagStates.empty()); + DiagStates.push_back(&Diag.DiagStates.front()); // the command-line one. + while (Idx < F.PragmaDiagMappings.size()) { + SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]); + unsigned DiagStateID = F.PragmaDiagMappings[Idx++]; + if (DiagStateID != 0) { + Diag.DiagStatePoints.push_back( + DiagnosticsEngine::DiagStatePoint(DiagStates[DiagStateID-1], + FullSourceLoc(Loc, SourceMgr))); + continue; + } + + assert(DiagStateID == 0); + // A new DiagState was created here. + Diag.DiagStates.push_back(*Diag.GetCurDiagState()); + DiagnosticsEngine::DiagState *NewState = &Diag.DiagStates.back(); + DiagStates.push_back(NewState); + Diag.DiagStatePoints.push_back( + DiagnosticsEngine::DiagStatePoint(NewState, + FullSourceLoc(Loc, SourceMgr))); + while (1) { + assert(Idx < F.PragmaDiagMappings.size() && + "Invalid data, didn't find '-1' marking end of diag/map pairs"); + if (Idx >= F.PragmaDiagMappings.size()) { + break; // Something is messed up but at least avoid infinite loop in + // release build. + } + unsigned DiagID = F.PragmaDiagMappings[Idx++]; + if (DiagID == (unsigned)-1) { + break; // no more diag/map pairs for this location. + } + diag::Mapping Map = (diag::Mapping)F.PragmaDiagMappings[Idx++]; + DiagnosticMappingInfo MappingInfo = Diag.makeMappingInfo(Map, Loc); + Diag.GetCurDiagState()->setMappingInfo(DiagID, MappingInfo); + } + } + } +} + +/// \brief Get the correct cursor and offset for loading a type. +ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { + GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index); + assert(I != GlobalTypeMap.end() && "Corrupted global type map"); + ModuleFile *M = I->second; + return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]); +} + +/// \brief Read and return the type with the given index.. +/// +/// The index is the type ID, shifted and minus the number of predefs. This +/// routine actually reads the record corresponding to the type at the given +/// location. It is a helper routine for GetType, which deals with reading type +/// IDs. +QualType ASTReader::readTypeRecord(unsigned Index) { + RecordLocation Loc = TypeCursorForIndex(Index); + BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; + + // Keep track of where we are in the stream, then jump back there + // after reading this type. + SavedStreamPosition SavedPosition(DeclsCursor); + + ReadingKindTracker ReadingKind(Read_Type, *this); + + // Note that we are loading a type record. + Deserializing AType(this); + + unsigned Idx = 0; + DeclsCursor.JumpToBit(Loc.Offset); + RecordData Record; + unsigned Code = DeclsCursor.ReadCode(); + switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) { + case TYPE_EXT_QUAL: { + if (Record.size() != 2) { + Error("Incorrect encoding of extended qualifier type"); + return QualType(); + } + QualType Base = readType(*Loc.F, Record, Idx); + Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]); + return Context.getQualifiedType(Base, Quals); + } + + case TYPE_COMPLEX: { + if (Record.size() != 1) { + Error("Incorrect encoding of complex type"); + return QualType(); + } + QualType ElemType = readType(*Loc.F, Record, Idx); + return Context.getComplexType(ElemType); + } + + case TYPE_POINTER: { + if (Record.size() != 1) { + Error("Incorrect encoding of pointer type"); + return QualType(); + } + QualType PointeeType = readType(*Loc.F, Record, Idx); + return Context.getPointerType(PointeeType); + } + + case TYPE_DECAYED: { + if (Record.size() != 1) { + Error("Incorrect encoding of decayed type"); + return QualType(); + } + QualType OriginalType = readType(*Loc.F, Record, Idx); + QualType DT = Context.getAdjustedParameterType(OriginalType); + if (!isa<DecayedType>(DT)) + Error("Decayed type does not decay"); + return DT; + } + + case TYPE_BLOCK_POINTER: { + if (Record.size() != 1) { + Error("Incorrect encoding of block pointer type"); + return QualType(); + } + QualType PointeeType = readType(*Loc.F, Record, Idx); + return Context.getBlockPointerType(PointeeType); + } + + case TYPE_LVALUE_REFERENCE: { + if (Record.size() != 2) { + Error("Incorrect encoding of lvalue reference type"); + return QualType(); + } + QualType PointeeType = readType(*Loc.F, Record, Idx); + return Context.getLValueReferenceType(PointeeType, Record[1]); + } + + case TYPE_RVALUE_REFERENCE: { + if (Record.size() != 1) { + Error("Incorrect encoding of rvalue reference type"); + return QualType(); + } + QualType PointeeType = readType(*Loc.F, Record, Idx); + return Context.getRValueReferenceType(PointeeType); + } + + case TYPE_MEMBER_POINTER: { + if (Record.size() != 2) { + Error("Incorrect encoding of member pointer type"); + return QualType(); + } + QualType PointeeType = readType(*Loc.F, Record, Idx); + QualType ClassType = readType(*Loc.F, Record, Idx); + if (PointeeType.isNull() || ClassType.isNull()) + return QualType(); + + return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr()); + } + + case TYPE_CONSTANT_ARRAY: { + QualType ElementType = readType(*Loc.F, Record, Idx); + ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; + unsigned IndexTypeQuals = Record[2]; + unsigned Idx = 3; + llvm::APInt Size = ReadAPInt(Record, Idx); + return Context.getConstantArrayType(ElementType, Size, + ASM, IndexTypeQuals); + } + + case TYPE_INCOMPLETE_ARRAY: { + QualType ElementType = readType(*Loc.F, Record, Idx); + ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; + unsigned IndexTypeQuals = Record[2]; + return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); + } + + case TYPE_VARIABLE_ARRAY: { + QualType ElementType = readType(*Loc.F, Record, Idx); + ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; + unsigned IndexTypeQuals = Record[2]; + SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); + SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); + return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F), + ASM, IndexTypeQuals, + SourceRange(LBLoc, RBLoc)); + } + + case TYPE_VECTOR: { + if (Record.size() != 3) { + Error("incorrect encoding of vector type in AST file"); + return QualType(); + } + + QualType ElementType = readType(*Loc.F, Record, Idx); + unsigned NumElements = Record[1]; + unsigned VecKind = Record[2]; + return Context.getVectorType(ElementType, NumElements, + (VectorType::VectorKind)VecKind); + } + + case TYPE_EXT_VECTOR: { + if (Record.size() != 3) { + Error("incorrect encoding of extended vector type in AST file"); + return QualType(); + } + + QualType ElementType = readType(*Loc.F, Record, Idx); + unsigned NumElements = Record[1]; + return Context.getExtVectorType(ElementType, NumElements); + } + + case TYPE_FUNCTION_NO_PROTO: { + if (Record.size() != 6) { + Error("incorrect encoding of no-proto function type"); + return QualType(); + } + QualType ResultType = readType(*Loc.F, Record, Idx); + FunctionType::ExtInfo Info(Record[1], Record[2], Record[3], + (CallingConv)Record[4], Record[5]); + return Context.getFunctionNoProtoType(ResultType, Info); + } + + case TYPE_FUNCTION_PROTO: { + QualType ResultType = readType(*Loc.F, Record, Idx); + + FunctionProtoType::ExtProtoInfo EPI; + EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], + /*hasregparm*/ Record[2], + /*regparm*/ Record[3], + static_cast<CallingConv>(Record[4]), + /*produces*/ Record[5]); + + unsigned Idx = 6; + unsigned NumParams = Record[Idx++]; + SmallVector<QualType, 16> ParamTypes; + for (unsigned I = 0; I != NumParams; ++I) + ParamTypes.push_back(readType(*Loc.F, Record, Idx)); + + EPI.Variadic = Record[Idx++]; + EPI.HasTrailingReturn = Record[Idx++]; + EPI.TypeQuals = Record[Idx++]; + EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); + ExceptionSpecificationType EST = + static_cast<ExceptionSpecificationType>(Record[Idx++]); + EPI.ExceptionSpecType = EST; + SmallVector<QualType, 2> Exceptions; + if (EST == EST_Dynamic) { + EPI.NumExceptions = Record[Idx++]; + for (unsigned I = 0; I != EPI.NumExceptions; ++I) + Exceptions.push_back(readType(*Loc.F, Record, Idx)); + EPI.Exceptions = Exceptions.data(); + } else if (EST == EST_ComputedNoexcept) { + EPI.NoexceptExpr = ReadExpr(*Loc.F); + } else if (EST == EST_Uninstantiated) { + EPI.ExceptionSpecDecl = ReadDeclAs<FunctionDecl>(*Loc.F, Record, Idx); + EPI.ExceptionSpecTemplate = ReadDeclAs<FunctionDecl>(*Loc.F, Record, Idx); + } else if (EST == EST_Unevaluated) { + EPI.ExceptionSpecDecl = ReadDeclAs<FunctionDecl>(*Loc.F, Record, Idx); + } + return Context.getFunctionType(ResultType, ParamTypes, EPI); + } + + case TYPE_UNRESOLVED_USING: { + unsigned Idx = 0; + return Context.getTypeDeclType( + ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx)); + } + + case TYPE_TYPEDEF: { + if (Record.size() != 2) { + Error("incorrect encoding of typedef type"); + return QualType(); + } + unsigned Idx = 0; + TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx); + QualType Canonical = readType(*Loc.F, Record, Idx); + if (!Canonical.isNull()) + Canonical = Context.getCanonicalType(Canonical); + return Context.getTypedefType(Decl, Canonical); + } + + case TYPE_TYPEOF_EXPR: + return Context.getTypeOfExprType(ReadExpr(*Loc.F)); + + case TYPE_TYPEOF: { + if (Record.size() != 1) { + Error("incorrect encoding of typeof(type) in AST file"); + return QualType(); + } + QualType UnderlyingType = readType(*Loc.F, Record, Idx); + return Context.getTypeOfType(UnderlyingType); + } + + case TYPE_DECLTYPE: { + QualType UnderlyingType = readType(*Loc.F, Record, Idx); + return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType); + } + + case TYPE_UNARY_TRANSFORM: { + QualType BaseType = readType(*Loc.F, Record, Idx); + QualType UnderlyingType = readType(*Loc.F, Record, Idx); + UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2]; + return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind); + } + + case TYPE_AUTO: { + QualType Deduced = readType(*Loc.F, Record, Idx); + bool IsDecltypeAuto = Record[Idx++]; + bool IsDependent = Deduced.isNull() ? Record[Idx++] : false; + return Context.getAutoType(Deduced, IsDecltypeAuto, IsDependent); + } + + case TYPE_RECORD: { + if (Record.size() != 2) { + Error("incorrect encoding of record type"); + return QualType(); + } + unsigned Idx = 0; + bool IsDependent = Record[Idx++]; + RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx); + RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl()); + QualType T = Context.getRecordType(RD); + const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); + return T; + } + + case TYPE_ENUM: { + if (Record.size() != 2) { + Error("incorrect encoding of enum type"); + return QualType(); + } + unsigned Idx = 0; + bool IsDependent = Record[Idx++]; + QualType T + = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx)); + const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); + return T; + } + + case TYPE_ATTRIBUTED: { + if (Record.size() != 3) { + Error("incorrect encoding of attributed type"); + return QualType(); + } + QualType modifiedType = readType(*Loc.F, Record, Idx); + QualType equivalentType = readType(*Loc.F, Record, Idx); + AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); + return Context.getAttributedType(kind, modifiedType, equivalentType); + } + + case TYPE_PAREN: { + if (Record.size() != 1) { + Error("incorrect encoding of paren type"); + return QualType(); + } + QualType InnerType = readType(*Loc.F, Record, Idx); + return Context.getParenType(InnerType); + } + + case TYPE_PACK_EXPANSION: { + if (Record.size() != 2) { + Error("incorrect encoding of pack expansion type"); + return QualType(); + } + QualType Pattern = readType(*Loc.F, Record, Idx); + if (Pattern.isNull()) + return QualType(); + Optional<unsigned> NumExpansions; + if (Record[1]) + NumExpansions = Record[1] - 1; + return Context.getPackExpansionType(Pattern, NumExpansions); + } + + case TYPE_ELABORATED: { + unsigned Idx = 0; + ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; + NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); + QualType NamedType = readType(*Loc.F, Record, Idx); + return Context.getElaboratedType(Keyword, NNS, NamedType); + } + + case TYPE_OBJC_INTERFACE: { + unsigned Idx = 0; + ObjCInterfaceDecl *ItfD + = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx); + return Context.getObjCInterfaceType(ItfD->getCanonicalDecl()); + } + + case TYPE_OBJC_OBJECT: { + unsigned Idx = 0; + QualType Base = readType(*Loc.F, Record, Idx); + unsigned NumProtos = Record[Idx++]; + SmallVector<ObjCProtocolDecl*, 4> Protos; + for (unsigned I = 0; I != NumProtos; ++I) + Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx)); + return Context.getObjCObjectType(Base, Protos.data(), NumProtos); + } + + case TYPE_OBJC_OBJECT_POINTER: { + unsigned Idx = 0; + QualType Pointee = readType(*Loc.F, Record, Idx); + return Context.getObjCObjectPointerType(Pointee); + } + + case TYPE_SUBST_TEMPLATE_TYPE_PARM: { + unsigned Idx = 0; + QualType Parm = readType(*Loc.F, Record, Idx); + QualType Replacement = readType(*Loc.F, Record, Idx); + return + Context.getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), + Replacement); + } + + case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { + unsigned Idx = 0; + QualType Parm = readType(*Loc.F, Record, Idx); + TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); + return Context.getSubstTemplateTypeParmPackType( + cast<TemplateTypeParmType>(Parm), + ArgPack); + } + + case TYPE_INJECTED_CLASS_NAME: { + CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx); + QualType TST = readType(*Loc.F, Record, Idx); // probably derivable + // FIXME: ASTContext::getInjectedClassNameType is not currently suitable + // for AST reading, too much interdependencies. + return + QualType(new (Context, TypeAlignment) InjectedClassNameType(D, TST), 0); + } + + case TYPE_TEMPLATE_TYPE_PARM: { + unsigned Idx = 0; + unsigned Depth = Record[Idx++]; + unsigned Index = Record[Idx++]; + bool Pack = Record[Idx++]; + TemplateTypeParmDecl *D + = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx); + return Context.getTemplateTypeParmType(Depth, Index, Pack, D); + } + + case TYPE_DEPENDENT_NAME: { + unsigned Idx = 0; + ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; + NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); + const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); + QualType Canon = readType(*Loc.F, Record, Idx); + if (!Canon.isNull()) + Canon = Context.getCanonicalType(Canon); + return Context.getDependentNameType(Keyword, NNS, Name, Canon); + } + + case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { + unsigned Idx = 0; + ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; + NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); + const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); + unsigned NumArgs = Record[Idx++]; + SmallVector<TemplateArgument, 8> Args; + Args.reserve(NumArgs); + while (NumArgs--) + Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); + return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name, + Args.size(), Args.data()); + } + + case TYPE_DEPENDENT_SIZED_ARRAY: { + unsigned Idx = 0; + + // ArrayType + QualType ElementType = readType(*Loc.F, Record, Idx); + ArrayType::ArraySizeModifier ASM + = (ArrayType::ArraySizeModifier)Record[Idx++]; + unsigned IndexTypeQuals = Record[Idx++]; + + // DependentSizedArrayType + Expr *NumElts = ReadExpr(*Loc.F); + SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); + + return Context.getDependentSizedArrayType(ElementType, NumElts, ASM, + IndexTypeQuals, Brackets); + } + + case TYPE_TEMPLATE_SPECIALIZATION: { + unsigned Idx = 0; + bool IsDependent = Record[Idx++]; + TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); + SmallVector<TemplateArgument, 8> Args; + ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); + QualType Underlying = readType(*Loc.F, Record, Idx); + QualType T; + if (Underlying.isNull()) + T = Context.getCanonicalTemplateSpecializationType(Name, Args.data(), + Args.size()); + else + T = Context.getTemplateSpecializationType(Name, Args.data(), + Args.size(), Underlying); + const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); + return T; + } + + case TYPE_ATOMIC: { + if (Record.size() != 1) { + Error("Incorrect encoding of atomic type"); + return QualType(); + } + QualType ValueType = readType(*Loc.F, Record, Idx); + return Context.getAtomicType(ValueType); + } + } + llvm_unreachable("Invalid TypeCode!"); +} + +class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { + ASTReader &Reader; + ModuleFile &F; + const ASTReader::RecordData &Record; + unsigned &Idx; + + SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, + unsigned &I) { + return Reader.ReadSourceLocation(F, R, I); + } + + template<typename T> + T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) { + return Reader.ReadDeclAs<T>(F, Record, Idx); + } + +public: + TypeLocReader(ASTReader &Reader, ModuleFile &F, + const ASTReader::RecordData &Record, unsigned &Idx) + : Reader(Reader), F(F), Record(Record), Idx(Idx) + { } + + // We want compile-time assurance that we've enumerated all of + // these, so unfortunately we have to declare them first, then + // define them out-of-line. +#define ABSTRACT_TYPELOC(CLASS, PARENT) +#define TYPELOC(CLASS, PARENT) \ + void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); +#include "clang/AST/TypeLocNodes.def" + + void VisitFunctionTypeLoc(FunctionTypeLoc); + void VisitArrayTypeLoc(ArrayTypeLoc); +}; + +void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { + // nothing to do +} +void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { + TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); + if (TL.needsExtraLocalData()) { + TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); + TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); + TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); + TL.setModeAttr(Record[Idx++]); + } +} +void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { + TL.setStarLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) { + // nothing to do +} +void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { + TL.setCaretLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { + TL.setAmpLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { + TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { + TL.setStarLoc(ReadSourceLocation(Record, Idx)); + TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); +} +void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { + TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); + TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); + if (Record[Idx++]) + TL.setSizeExpr(Reader.ReadExpr(F)); + else + TL.setSizeExpr(0); +} +void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocReader::VisitDependentSizedArrayTypeLoc( + DependentSizedArrayTypeLoc TL) { + VisitArrayTypeLoc(TL); +} +void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( + DependentSizedExtVectorTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { + TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx)); + TL.setLParenLoc(ReadSourceLocation(Record, Idx)); + TL.setRParenLoc(ReadSourceLocation(Record, Idx)); + TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx)); + for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { + TL.setArg(i, ReadDeclAs<ParmVarDecl>(Record, Idx)); + } +} +void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { + VisitFunctionTypeLoc(TL); +} +void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { + VisitFunctionTypeLoc(TL); +} +void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { + TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); + TL.setLParenLoc(ReadSourceLocation(Record, Idx)); + TL.setRParenLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { + TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); + TL.setLParenLoc(ReadSourceLocation(Record, Idx)); + TL.setRParenLoc(ReadSourceLocation(Record, Idx)); + TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); +} +void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { + TL.setKWLoc(ReadSourceLocation(Record, Idx)); + TL.setLParenLoc(ReadSourceLocation(Record, Idx)); + TL.setRParenLoc(ReadSourceLocation(Record, Idx)); + TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); +} +void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { + TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); + if (TL.hasAttrOperand()) { + SourceRange range; + range.setBegin(ReadSourceLocation(Record, Idx)); + range.setEnd(ReadSourceLocation(Record, Idx)); + TL.setAttrOperandParensRange(range); + } + if (TL.hasAttrExprOperand()) { + if (Record[Idx++]) + TL.setAttrExprOperand(Reader.ReadExpr(F)); + else + TL.setAttrExprOperand(0); + } else if (TL.hasAttrEnumOperand()) + TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( + SubstTemplateTypeParmTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( + SubstTemplateTypeParmPackTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitTemplateSpecializationTypeLoc( + TemplateSpecializationTypeLoc TL) { + TL.setTemplateKeywordLoc(ReadSourceLocation(Record, Idx)); + TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); + TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); + TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); + for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) + TL.setArgLocInfo(i, + Reader.GetTemplateArgumentLocInfo(F, + TL.getTypePtr()->getArg(i).getKind(), + Record, Idx)); +} +void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { + TL.setLParenLoc(ReadSourceLocation(Record, Idx)); + TL.setRParenLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { + TL.setElaboratedKeywordLoc(ReadSourceLocation(Record, Idx)); + TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); +} +void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { + TL.setElaboratedKeywordLoc(ReadSourceLocation(Record, Idx)); + TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( + DependentTemplateSpecializationTypeLoc TL) { + TL.setElaboratedKeywordLoc(ReadSourceLocation(Record, Idx)); + TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); + TL.setTemplateKeywordLoc(ReadSourceLocation(Record, Idx)); + TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); + TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); + TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); + for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) + TL.setArgLocInfo(I, + Reader.GetTemplateArgumentLocInfo(F, + TL.getTypePtr()->getArg(I).getKind(), + Record, Idx)); +} +void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { + TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { + TL.setNameLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { + TL.setHasBaseTypeAsWritten(Record[Idx++]); + TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); + TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); + for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) + TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { + TL.setStarLoc(ReadSourceLocation(Record, Idx)); +} +void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) { + TL.setKWLoc(ReadSourceLocation(Record, Idx)); + TL.setLParenLoc(ReadSourceLocation(Record, Idx)); + TL.setRParenLoc(ReadSourceLocation(Record, Idx)); +} + +TypeSourceInfo *ASTReader::GetTypeSourceInfo(ModuleFile &F, + const RecordData &Record, + unsigned &Idx) { + QualType InfoTy = readType(F, Record, Idx); + if (InfoTy.isNull()) + return 0; + + TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy); + TypeLocReader TLR(*this, F, Record, Idx); + for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) + TLR.Visit(TL); + return TInfo; +} + +QualType ASTReader::GetType(TypeID ID) { + unsigned FastQuals = ID & Qualifiers::FastMask; + unsigned Index = ID >> Qualifiers::FastWidth; + + if (Index < NUM_PREDEF_TYPE_IDS) { + QualType T; + switch ((PredefinedTypeIDs)Index) { + case PREDEF_TYPE_NULL_ID: return QualType(); + case PREDEF_TYPE_VOID_ID: T = Context.VoidTy; break; + case PREDEF_TYPE_BOOL_ID: T = Context.BoolTy; break; + + case PREDEF_TYPE_CHAR_U_ID: + case PREDEF_TYPE_CHAR_S_ID: + // FIXME: Check that the signedness of CharTy is correct! + T = Context.CharTy; + break; + + case PREDEF_TYPE_UCHAR_ID: T = Context.UnsignedCharTy; break; + case PREDEF_TYPE_USHORT_ID: T = Context.UnsignedShortTy; break; + case PREDEF_TYPE_UINT_ID: T = Context.UnsignedIntTy; break; + case PREDEF_TYPE_ULONG_ID: T = Context.UnsignedLongTy; break; + case PREDEF_TYPE_ULONGLONG_ID: T = Context.UnsignedLongLongTy; break; + case PREDEF_TYPE_UINT128_ID: T = Context.UnsignedInt128Ty; break; + case PREDEF_TYPE_SCHAR_ID: T = Context.SignedCharTy; break; + case PREDEF_TYPE_WCHAR_ID: T = Context.WCharTy; break; + case PREDEF_TYPE_SHORT_ID: T = Context.ShortTy; break; + case PREDEF_TYPE_INT_ID: T = Context.IntTy; break; + case PREDEF_TYPE_LONG_ID: T = Context.LongTy; break; + case PREDEF_TYPE_LONGLONG_ID: T = Context.LongLongTy; break; + case PREDEF_TYPE_INT128_ID: T = Context.Int128Ty; break; + case PREDEF_TYPE_HALF_ID: T = Context.HalfTy; break; + case PREDEF_TYPE_FLOAT_ID: T = Context.FloatTy; break; + case PREDEF_TYPE_DOUBLE_ID: T = Context.DoubleTy; break; + case PREDEF_TYPE_LONGDOUBLE_ID: T = Context.LongDoubleTy; break; + case PREDEF_TYPE_OVERLOAD_ID: T = Context.OverloadTy; break; + case PREDEF_TYPE_BOUND_MEMBER: T = Context.BoundMemberTy; break; + case PREDEF_TYPE_PSEUDO_OBJECT: T = Context.PseudoObjectTy; break; + case PREDEF_TYPE_DEPENDENT_ID: T = Context.DependentTy; break; + case PREDEF_TYPE_UNKNOWN_ANY: T = Context.UnknownAnyTy; break; + case PREDEF_TYPE_NULLPTR_ID: T = Context.NullPtrTy; break; + case PREDEF_TYPE_CHAR16_ID: T = Context.Char16Ty; break; + case PREDEF_TYPE_CHAR32_ID: T = Context.Char32Ty; break; + case PREDEF_TYPE_OBJC_ID: T = Context.ObjCBuiltinIdTy; break; + case PREDEF_TYPE_OBJC_CLASS: T = Context.ObjCBuiltinClassTy; break; + case PREDEF_TYPE_OBJC_SEL: T = Context.ObjCBuiltinSelTy; break; + case PREDEF_TYPE_IMAGE1D_ID: T = Context.OCLImage1dTy; break; + case PREDEF_TYPE_IMAGE1D_ARR_ID: T = Context.OCLImage1dArrayTy; break; + case PREDEF_TYPE_IMAGE1D_BUFF_ID: T = Context.OCLImage1dBufferTy; break; + case PREDEF_TYPE_IMAGE2D_ID: T = Context.OCLImage2dTy; break; + case PREDEF_TYPE_IMAGE2D_ARR_ID: T = Context.OCLImage2dArrayTy; break; + case PREDEF_TYPE_IMAGE3D_ID: T = Context.OCLImage3dTy; break; + case PREDEF_TYPE_SAMPLER_ID: T = Context.OCLSamplerTy; break; + case PREDEF_TYPE_EVENT_ID: T = Context.OCLEventTy; break; + case PREDEF_TYPE_AUTO_DEDUCT: T = Context.getAutoDeductType(); break; + + case PREDEF_TYPE_AUTO_RREF_DEDUCT: + T = Context.getAutoRRefDeductType(); + break; + + case PREDEF_TYPE_ARC_UNBRIDGED_CAST: + T = Context.ARCUnbridgedCastTy; + break; + + case PREDEF_TYPE_VA_LIST_TAG: + T = Context.getVaListTagType(); + break; + + case PREDEF_TYPE_BUILTIN_FN: + T = Context.BuiltinFnTy; + break; + } + + assert(!T.isNull() && "Unknown predefined type"); + return T.withFastQualifiers(FastQuals); + } + + Index -= NUM_PREDEF_TYPE_IDS; + assert(Index < TypesLoaded.size() && "Type index out-of-range"); + if (TypesLoaded[Index].isNull()) { + TypesLoaded[Index] = readTypeRecord(Index); + if (TypesLoaded[Index].isNull()) + return QualType(); + + TypesLoaded[Index]->setFromAST(); + if (DeserializationListener) + DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), + TypesLoaded[Index]); + } + + return TypesLoaded[Index].withFastQualifiers(FastQuals); +} + +QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) { + return GetType(getGlobalTypeID(F, LocalID)); +} + +serialization::TypeID +ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const { + unsigned FastQuals = LocalID & Qualifiers::FastMask; + unsigned LocalIndex = LocalID >> Qualifiers::FastWidth; + + if (LocalIndex < NUM_PREDEF_TYPE_IDS) + return LocalID; + + ContinuousRangeMap<uint32_t, int, 2>::iterator I + = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS); + assert(I != F.TypeRemap.end() && "Invalid index into type index remap"); + + unsigned GlobalIndex = LocalIndex + I->second; + return (GlobalIndex << Qualifiers::FastWidth) | FastQuals; +} + +TemplateArgumentLocInfo +ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F, + TemplateArgument::ArgKind Kind, + const RecordData &Record, + unsigned &Index) { + switch (Kind) { + case TemplateArgument::Expression: + return ReadExpr(F); + case TemplateArgument::Type: + return GetTypeSourceInfo(F, Record, Index); + case TemplateArgument::Template: { + NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, + Index); + SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); + return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, + SourceLocation()); + } + case TemplateArgument::TemplateExpansion: { + NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, + Index); + SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); + SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); + return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, + EllipsisLoc); + } + case TemplateArgument::Null: + case TemplateArgument::Integral: + case TemplateArgument::Declaration: + case TemplateArgument::NullPtr: + case TemplateArgument::Pack: + // FIXME: Is this right? + return TemplateArgumentLocInfo(); + } + llvm_unreachable("unexpected template argument loc"); +} + +TemplateArgumentLoc +ASTReader::ReadTemplateArgumentLoc(ModuleFile &F, + const RecordData &Record, unsigned &Index) { + TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); + + if (Arg.getKind() == TemplateArgument::Expression) { + if (Record[Index++]) // bool InfoHasSameExpr. + return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); + } + return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), + Record, Index)); +} + +const ASTTemplateArgumentListInfo* +ASTReader::ReadASTTemplateArgumentListInfo(ModuleFile &F, + const RecordData &Record, + unsigned &Index) { + SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Index); + SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Index); + unsigned NumArgsAsWritten = Record[Index++]; + TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc); + for (unsigned i = 0; i != NumArgsAsWritten; ++i) + TemplArgsInfo.addArgument(ReadTemplateArgumentLoc(F, Record, Index)); + return ASTTemplateArgumentListInfo::Create(getContext(), TemplArgsInfo); +} + +Decl *ASTReader::GetExternalDecl(uint32_t ID) { + return GetDecl(ID); +} + +uint64_t ASTReader::readCXXBaseSpecifiers(ModuleFile &M, const RecordData &Record, + unsigned &Idx){ + if (Idx >= Record.size()) + return 0; + + unsigned LocalID = Record[Idx++]; + return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]); +} + +CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { + RecordLocation Loc = getLocalBitOffset(Offset); + BitstreamCursor &Cursor = Loc.F->DeclsCursor; + SavedStreamPosition SavedPosition(Cursor); + Cursor.JumpToBit(Loc.Offset); + ReadingKindTracker ReadingKind(Read_Decl, *this); + RecordData Record; + unsigned Code = Cursor.ReadCode(); + unsigned RecCode = Cursor.readRecord(Code, Record); + if (RecCode != DECL_CXX_BASE_SPECIFIERS) { + Error("Malformed AST file: missing C++ base specifiers"); + return 0; + } + + unsigned Idx = 0; + unsigned NumBases = Record[Idx++]; + void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases); + CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; + for (unsigned I = 0; I != NumBases; ++I) + Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx); + return Bases; +} + +serialization::DeclID +ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const { + if (LocalID < NUM_PREDEF_DECL_IDS) + return LocalID; + + ContinuousRangeMap<uint32_t, int, 2>::iterator I + = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS); + assert(I != F.DeclRemap.end() && "Invalid index into decl index remap"); + + return LocalID + I->second; +} + +bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID, + ModuleFile &M) const { + GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(ID); + assert(I != GlobalDeclMap.end() && "Corrupted global declaration map"); + return &M == I->second; +} + +ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) { + if (!D->isFromASTFile()) + return 0; + GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(D->getGlobalID()); + assert(I != GlobalDeclMap.end() && "Corrupted global declaration map"); + return I->second; +} + +SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) { + if (ID < NUM_PREDEF_DECL_IDS) + return SourceLocation(); + + unsigned Index = ID - NUM_PREDEF_DECL_IDS; + + if (Index > DeclsLoaded.size()) { + Error("declaration ID out-of-range for AST file"); + return SourceLocation(); + } + + if (Decl *D = DeclsLoaded[Index]) + return D->getLocation(); + + unsigned RawLocation = 0; + RecordLocation Rec = DeclCursorForID(ID, RawLocation); + return ReadSourceLocation(*Rec.F, RawLocation); +} + +Decl *ASTReader::GetDecl(DeclID ID) { + if (ID < NUM_PREDEF_DECL_IDS) { + switch ((PredefinedDeclIDs)ID) { + case PREDEF_DECL_NULL_ID: + return 0; + + case PREDEF_DECL_TRANSLATION_UNIT_ID: + return Context.getTranslationUnitDecl(); + + case PREDEF_DECL_OBJC_ID_ID: + return Context.getObjCIdDecl(); + + case PREDEF_DECL_OBJC_SEL_ID: + return Context.getObjCSelDecl(); + + case PREDEF_DECL_OBJC_CLASS_ID: + return Context.getObjCClassDecl(); + + case PREDEF_DECL_OBJC_PROTOCOL_ID: + return Context.getObjCProtocolDecl(); + + case PREDEF_DECL_INT_128_ID: + return Context.getInt128Decl(); + + case PREDEF_DECL_UNSIGNED_INT_128_ID: + return Context.getUInt128Decl(); + + case PREDEF_DECL_OBJC_INSTANCETYPE_ID: + return Context.getObjCInstanceTypeDecl(); + + case PREDEF_DECL_BUILTIN_VA_LIST_ID: + return Context.getBuiltinVaListDecl(); + } + } + + unsigned Index = ID - NUM_PREDEF_DECL_IDS; + + if (Index >= DeclsLoaded.size()) { + assert(0 && "declaration ID out-of-range for AST file"); + Error("declaration ID out-of-range for AST file"); + return 0; + } + + if (!DeclsLoaded[Index]) { + ReadDeclRecord(ID); + if (DeserializationListener) + DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); + } + + return DeclsLoaded[Index]; +} + +DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M, + DeclID GlobalID) { + if (GlobalID < NUM_PREDEF_DECL_IDS) + return GlobalID; + + GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(GlobalID); + assert(I != GlobalDeclMap.end() && "Corrupted global declaration map"); + ModuleFile *Owner = I->second; + + llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos + = M.GlobalToLocalDeclIDs.find(Owner); + if (Pos == M.GlobalToLocalDeclIDs.end()) + return 0; + + return GlobalID - Owner->BaseDeclID + Pos->second; +} + +serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F, + const RecordData &Record, + unsigned &Idx) { + if (Idx >= Record.size()) { + Error("Corrupted AST file"); + return 0; + } + + return getGlobalDeclID(F, Record[Idx++]); +} + +/// \brief Resolve the offset of a statement into a statement. +/// +/// This operation will read a new statement from the external +/// source each time it is called, and is meant to be used via a +/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). +Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { + // Switch case IDs are per Decl. + ClearSwitchCaseIDs(); + + // Offset here is a global offset across the entire chain. + RecordLocation Loc = getLocalBitOffset(Offset); + Loc.F->DeclsCursor.JumpToBit(Loc.Offset); + return ReadStmtFromStream(*Loc.F); +} + +namespace { + class FindExternalLexicalDeclsVisitor { + ASTReader &Reader; + const DeclContext *DC; + bool (*isKindWeWant)(Decl::Kind); + + SmallVectorImpl<Decl*> &Decls; + bool PredefsVisited[NUM_PREDEF_DECL_IDS]; + + public: + FindExternalLexicalDeclsVisitor(ASTReader &Reader, const DeclContext *DC, + bool (*isKindWeWant)(Decl::Kind), + SmallVectorImpl<Decl*> &Decls) + : Reader(Reader), DC(DC), isKindWeWant(isKindWeWant), Decls(Decls) + { + for (unsigned I = 0; I != NUM_PREDEF_DECL_IDS; ++I) + PredefsVisited[I] = false; + } + + static bool visit(ModuleFile &M, bool Preorder, void *UserData) { + if (Preorder) + return false; + + FindExternalLexicalDeclsVisitor *This + = static_cast<FindExternalLexicalDeclsVisitor *>(UserData); + + ModuleFile::DeclContextInfosMap::iterator Info + = M.DeclContextInfos.find(This->DC); + if (Info == M.DeclContextInfos.end() || !Info->second.LexicalDecls) + return false; + + // Load all of the declaration IDs + for (const KindDeclIDPair *ID = Info->second.LexicalDecls, + *IDE = ID + Info->second.NumLexicalDecls; + ID != IDE; ++ID) { + if (This->isKindWeWant && !This->isKindWeWant((Decl::Kind)ID->first)) + continue; + + // Don't add predefined declarations to the lexical context more + // than once. + if (ID->second < NUM_PREDEF_DECL_IDS) { + if (This->PredefsVisited[ID->second]) + continue; + + This->PredefsVisited[ID->second] = true; + } + + if (Decl *D = This->Reader.GetLocalDecl(M, ID->second)) { + if (!This->DC->isDeclInLexicalTraversal(D)) + This->Decls.push_back(D); + } + } + + return false; + } + }; +} + +ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC, + bool (*isKindWeWant)(Decl::Kind), + SmallVectorImpl<Decl*> &Decls) { + // There might be lexical decls in multiple modules, for the TU at + // least. Walk all of the modules in the order they were loaded. + FindExternalLexicalDeclsVisitor Visitor(*this, DC, isKindWeWant, Decls); + ModuleMgr.visitDepthFirst(&FindExternalLexicalDeclsVisitor::visit, &Visitor); + ++NumLexicalDeclContextsRead; + return ELR_Success; +} + +namespace { + +class DeclIDComp { + ASTReader &Reader; + ModuleFile &Mod; + +public: + DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {} + + bool operator()(LocalDeclID L, LocalDeclID R) const { + SourceLocation LHS = getLocation(L); + SourceLocation RHS = getLocation(R); + return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); + } + + bool operator()(SourceLocation LHS, LocalDeclID R) const { + SourceLocation RHS = getLocation(R); + return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); + } + + bool operator()(LocalDeclID L, SourceLocation RHS) const { + SourceLocation LHS = getLocation(L); + return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS); + } + + SourceLocation getLocation(LocalDeclID ID) const { + return Reader.getSourceManager().getFileLoc( + Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID))); + } +}; + +} + +void ASTReader::FindFileRegionDecls(FileID File, + unsigned Offset, unsigned Length, + SmallVectorImpl<Decl *> &Decls) { + SourceManager &SM = getSourceManager(); + + llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File); + if (I == FileDeclIDs.end()) + return; + + FileDeclsInfo &DInfo = I->second; + if (DInfo.Decls.empty()) + return; + + SourceLocation + BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset); + SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length); + + DeclIDComp DIDComp(*this, *DInfo.Mod); + ArrayRef<serialization::LocalDeclID>::iterator + BeginIt = std::lower_bound(DInfo.Decls.begin(), DInfo.Decls.end(), + BeginLoc, DIDComp); + if (BeginIt != DInfo.Decls.begin()) + --BeginIt; + + // If we are pointing at a top-level decl inside an objc container, we need + // to backtrack until we find it otherwise we will fail to report that the + // region overlaps with an objc container. + while (BeginIt != DInfo.Decls.begin() && + GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt)) + ->isTopLevelDeclInObjCContainer()) + --BeginIt; + + ArrayRef<serialization::LocalDeclID>::iterator + EndIt = std::upper_bound(DInfo.Decls.begin(), DInfo.Decls.end(), + EndLoc, DIDComp); + if (EndIt != DInfo.Decls.end()) + ++EndIt; + + for (ArrayRef<serialization::LocalDeclID>::iterator + DIt = BeginIt; DIt != EndIt; ++DIt) + Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt))); +} + +namespace { + /// \brief ModuleFile visitor used to perform name lookup into a + /// declaration context. + class DeclContextNameLookupVisitor { + ASTReader &Reader; + SmallVectorImpl<const DeclContext *> &Contexts; + DeclarationName Name; + SmallVectorImpl<NamedDecl *> &Decls; + + public: + DeclContextNameLookupVisitor(ASTReader &Reader, + SmallVectorImpl<const DeclContext *> &Contexts, + DeclarationName Name, + SmallVectorImpl<NamedDecl *> &Decls) + : Reader(Reader), Contexts(Contexts), Name(Name), Decls(Decls) { } + + static bool visit(ModuleFile &M, void *UserData) { + DeclContextNameLookupVisitor *This + = static_cast<DeclContextNameLookupVisitor *>(UserData); + + // Check whether we have any visible declaration information for + // this context in this module. + ModuleFile::DeclContextInfosMap::iterator Info; + bool FoundInfo = false; + for (unsigned I = 0, N = This->Contexts.size(); I != N; ++I) { + Info = M.DeclContextInfos.find(This->Contexts[I]); + if (Info != M.DeclContextInfos.end() && + Info->second.NameLookupTableData) { + FoundInfo = true; + break; + } + } + + if (!FoundInfo) + return false; + + // Look for this name within this module. + ASTDeclContextNameLookupTable *LookupTable = + Info->second.NameLookupTableData; + ASTDeclContextNameLookupTable::iterator Pos + = LookupTable->find(This->Name); + if (Pos == LookupTable->end()) + return false; + + bool FoundAnything = false; + ASTDeclContextNameLookupTrait::data_type Data = *Pos; + for (; Data.first != Data.second; ++Data.first) { + NamedDecl *ND = This->Reader.GetLocalDeclAs<NamedDecl>(M, *Data.first); + if (!ND) + continue; + + if (ND->getDeclName() != This->Name) { + // A name might be null because the decl's redeclarable part is + // currently read before reading its name. The lookup is triggered by + // building that decl (likely indirectly), and so it is later in the + // sense of "already existing" and can be ignored here. + continue; + } + + // Record this declaration. + FoundAnything = true; + This->Decls.push_back(ND); + } + + return FoundAnything; + } + }; +} + +/// \brief Retrieve the "definitive" module file for the definition of the +/// given declaration context, if there is one. +/// +/// The "definitive" module file is the only place where we need to look to +/// find information about the declarations within the given declaration +/// context. For example, C++ and Objective-C classes, C structs/unions, and +/// Objective-C protocols, categories, and extensions are all defined in a +/// single place in the source code, so they have definitive module files +/// associated with them. C++ namespaces, on the other hand, can have +/// definitions in multiple different module files. +/// +/// Note: this needs to be kept in sync with ASTWriter::AddedVisibleDecl's +/// NDEBUG checking. +static ModuleFile *getDefinitiveModuleFileFor(const DeclContext *DC, + ASTReader &Reader) { + if (const DeclContext *DefDC = getDefinitiveDeclContext(DC)) + return Reader.getOwningModuleFile(cast<Decl>(DefDC)); + + return 0; +} + +bool +ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, + DeclarationName Name) { + assert(DC->hasExternalVisibleStorage() && + "DeclContext has no visible decls in storage"); + if (!Name) + return false; + + SmallVector<NamedDecl *, 64> Decls; + + // Compute the declaration contexts we need to look into. Multiple such + // declaration contexts occur when two declaration contexts from disjoint + // modules get merged, e.g., when two namespaces with the same name are + // independently defined in separate modules. + SmallVector<const DeclContext *, 2> Contexts; + Contexts.push_back(DC); + + if (DC->isNamespace()) { + MergedDeclsMap::iterator Merged + = MergedDecls.find(const_cast<Decl *>(cast<Decl>(DC))); + if (Merged != MergedDecls.end()) { + for (unsigned I = 0, N = Merged->second.size(); I != N; ++I) + Contexts.push_back(cast<DeclContext>(GetDecl(Merged->second[I]))); + } + } + + DeclContextNameLookupVisitor Visitor(*this, Contexts, Name, Decls); + + // If we can definitively determine which module file to look into, + // only look there. Otherwise, look in all module files. + ModuleFile *Definitive; + if (Contexts.size() == 1 && + (Definitive = getDefinitiveModuleFileFor(DC, *this))) { + DeclContextNameLookupVisitor::visit(*Definitive, &Visitor); + } else { + ModuleMgr.visit(&DeclContextNameLookupVisitor::visit, &Visitor); + } + ++NumVisibleDeclContextsRead; + SetExternalVisibleDeclsForName(DC, Name, Decls); + return !Decls.empty(); +} + +namespace { + /// \brief ModuleFile visitor used to retrieve all visible names in a + /// declaration context. + class DeclContextAllNamesVisitor { + ASTReader &Reader; + SmallVectorImpl<const DeclContext *> &Contexts; + DeclsMap &Decls; + bool VisitAll; + + public: + DeclContextAllNamesVisitor(ASTReader &Reader, + SmallVectorImpl<const DeclContext *> &Contexts, + DeclsMap &Decls, bool VisitAll) + : Reader(Reader), Contexts(Contexts), Decls(Decls), VisitAll(VisitAll) { } + + static bool visit(ModuleFile &M, void *UserData) { + DeclContextAllNamesVisitor *This + = static_cast<DeclContextAllNamesVisitor *>(UserData); + + // Check whether we have any visible declaration information for + // this context in this module. + ModuleFile::DeclContextInfosMap::iterator Info; + bool FoundInfo = false; + for (unsigned I = 0, N = This->Contexts.size(); I != N; ++I) { + Info = M.DeclContextInfos.find(This->Contexts[I]); + if (Info != M.DeclContextInfos.end() && + Info->second.NameLookupTableData) { + FoundInfo = true; + break; + } + } + + if (!FoundInfo) + return false; + + ASTDeclContextNameLookupTable *LookupTable = + Info->second.NameLookupTableData; + bool FoundAnything = false; + for (ASTDeclContextNameLookupTable::data_iterator + I = LookupTable->data_begin(), E = LookupTable->data_end(); + I != E; + ++I) { + ASTDeclContextNameLookupTrait::data_type Data = *I; + for (; Data.first != Data.second; ++Data.first) { + NamedDecl *ND = This->Reader.GetLocalDeclAs<NamedDecl>(M, + *Data.first); + if (!ND) + continue; + + // Record this declaration. + FoundAnything = true; + This->Decls[ND->getDeclName()].push_back(ND); + } + } + + return FoundAnything && !This->VisitAll; + } + }; +} + +void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) { + if (!DC->hasExternalVisibleStorage()) + return; + DeclsMap Decls; + + // Compute the declaration contexts we need to look into. Multiple such + // declaration contexts occur when two declaration contexts from disjoint + // modules get merged, e.g., when two namespaces with the same name are + // independently defined in separate modules. + SmallVector<const DeclContext *, 2> Contexts; + Contexts.push_back(DC); + + if (DC->isNamespace()) { + MergedDeclsMap::iterator Merged + = MergedDecls.find(const_cast<Decl *>(cast<Decl>(DC))); + if (Merged != MergedDecls.end()) { + for (unsigned I = 0, N = Merged->second.size(); I != N; ++I) + Contexts.push_back(cast<DeclContext>(GetDecl(Merged->second[I]))); + } + } + + DeclContextAllNamesVisitor Visitor(*this, Contexts, Decls, + /*VisitAll=*/DC->isFileContext()); + ModuleMgr.visit(&DeclContextAllNamesVisitor::visit, &Visitor); + ++NumVisibleDeclContextsRead; + + for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) { + SetExternalVisibleDeclsForName(DC, I->first, I->second); + } + const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false); +} + +/// \brief Under non-PCH compilation the consumer receives the objc methods +/// before receiving the implementation, and codegen depends on this. +/// We simulate this by deserializing and passing to consumer the methods of the +/// implementation before passing the deserialized implementation decl. +static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD, + ASTConsumer *Consumer) { + assert(ImplD && Consumer); + + for (ObjCImplDecl::method_iterator + I = ImplD->meth_begin(), E = ImplD->meth_end(); I != E; ++I) + Consumer->HandleInterestingDecl(DeclGroupRef(*I)); + + Consumer->HandleInterestingDecl(DeclGroupRef(ImplD)); +} + +void ASTReader::PassInterestingDeclsToConsumer() { + assert(Consumer); + while (!InterestingDecls.empty()) { + Decl *D = InterestingDecls.front(); + InterestingDecls.pop_front(); + + PassInterestingDeclToConsumer(D); + } +} + +void ASTReader::PassInterestingDeclToConsumer(Decl *D) { + if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D)) + PassObjCImplDeclToConsumer(ImplD, Consumer); + else + Consumer->HandleInterestingDecl(DeclGroupRef(D)); +} + +void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { + this->Consumer = Consumer; + + if (!Consumer) + return; + + for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { + // Force deserialization of this decl, which will cause it to be queued for + // passing to the consumer. + GetDecl(ExternalDefinitions[I]); + } + ExternalDefinitions.clear(); + + PassInterestingDeclsToConsumer(); +} + +void ASTReader::PrintStats() { + std::fprintf(stderr, "*** AST File Statistics:\n"); + + unsigned NumTypesLoaded + = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), + QualType()); + unsigned NumDeclsLoaded + = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), + (Decl *)0); + unsigned NumIdentifiersLoaded + = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), + IdentifiersLoaded.end(), + (IdentifierInfo *)0); + unsigned NumMacrosLoaded + = MacrosLoaded.size() - std::count(MacrosLoaded.begin(), + MacrosLoaded.end(), + (MacroInfo *)0); + unsigned NumSelectorsLoaded + = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), + SelectorsLoaded.end(), + Selector()); + + if (unsigned TotalNumSLocEntries = getTotalNumSLocs()) + std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", + NumSLocEntriesRead, TotalNumSLocEntries, + ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); + if (!TypesLoaded.empty()) + std::fprintf(stderr, " %u/%u types read (%f%%)\n", + NumTypesLoaded, (unsigned)TypesLoaded.size(), + ((float)NumTypesLoaded/TypesLoaded.size() * 100)); + if (!DeclsLoaded.empty()) + std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", + NumDeclsLoaded, (unsigned)DeclsLoaded.size(), + ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); + if (!IdentifiersLoaded.empty()) + std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", + NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), + ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); + if (!MacrosLoaded.empty()) + std::fprintf(stderr, " %u/%u macros read (%f%%)\n", + NumMacrosLoaded, (unsigned)MacrosLoaded.size(), + ((float)NumMacrosLoaded/MacrosLoaded.size() * 100)); + if (!SelectorsLoaded.empty()) + std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", + NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), + ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); + if (TotalNumStatements) + std::fprintf(stderr, " %u/%u statements read (%f%%)\n", + NumStatementsRead, TotalNumStatements, + ((float)NumStatementsRead/TotalNumStatements * 100)); + if (TotalNumMacros) + std::fprintf(stderr, " %u/%u macros read (%f%%)\n", + NumMacrosRead, TotalNumMacros, + ((float)NumMacrosRead/TotalNumMacros * 100)); + if (TotalLexicalDeclContexts) + std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", + NumLexicalDeclContextsRead, TotalLexicalDeclContexts, + ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts + * 100)); + if (TotalVisibleDeclContexts) + std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", + NumVisibleDeclContextsRead, TotalVisibleDeclContexts, + ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts + * 100)); + if (TotalNumMethodPoolEntries) { + std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", + NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, + ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries + * 100)); + } + if (NumMethodPoolLookups) { + std::fprintf(stderr, " %u/%u method pool lookups succeeded (%f%%)\n", + NumMethodPoolHits, NumMethodPoolLookups, + ((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0)); + } + if (NumMethodPoolTableLookups) { + std::fprintf(stderr, " %u/%u method pool table lookups succeeded (%f%%)\n", + NumMethodPoolTableHits, NumMethodPoolTableLookups, + ((float)NumMethodPoolTableHits/NumMethodPoolTableLookups + * 100.0)); + } + + if (NumIdentifierLookupHits) { + std::fprintf(stderr, + " %u / %u identifier table lookups succeeded (%f%%)\n", + NumIdentifierLookupHits, NumIdentifierLookups, + (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups); + } + + if (GlobalIndex) { + std::fprintf(stderr, "\n"); + GlobalIndex->printStats(); + } + + std::fprintf(stderr, "\n"); + dump(); + std::fprintf(stderr, "\n"); +} + +template<typename Key, typename ModuleFile, unsigned InitialCapacity> +static void +dumpModuleIDMap(StringRef Name, + const ContinuousRangeMap<Key, ModuleFile *, + InitialCapacity> &Map) { + if (Map.begin() == Map.end()) + return; + + typedef ContinuousRangeMap<Key, ModuleFile *, InitialCapacity> MapType; + llvm::errs() << Name << ":\n"; + for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); + I != IEnd; ++I) { + llvm::errs() << " " << I->first << " -> " << I->second->FileName + << "\n"; + } +} + +void ASTReader::dump() { + llvm::errs() << "*** PCH/ModuleFile Remappings:\n"; + dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap); + dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap); + dumpModuleIDMap("Global type map", GlobalTypeMap); + dumpModuleIDMap("Global declaration map", GlobalDeclMap); + dumpModuleIDMap("Global identifier map", GlobalIdentifierMap); + dumpModuleIDMap("Global macro map", GlobalMacroMap); + dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap); + dumpModuleIDMap("Global selector map", GlobalSelectorMap); + dumpModuleIDMap("Global preprocessed entity map", + GlobalPreprocessedEntityMap); + + llvm::errs() << "\n*** PCH/Modules Loaded:"; + for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(), + MEnd = ModuleMgr.end(); + M != MEnd; ++M) + (*M)->dump(); +} + +/// Return the amount of memory used by memory buffers, breaking down +/// by heap-backed versus mmap'ed memory. +void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { + for (ModuleConstIterator I = ModuleMgr.begin(), + E = ModuleMgr.end(); I != E; ++I) { + if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) { + size_t bytes = buf->getBufferSize(); + switch (buf->getBufferKind()) { + case llvm::MemoryBuffer::MemoryBuffer_Malloc: + sizes.malloc_bytes += bytes; + break; + case llvm::MemoryBuffer::MemoryBuffer_MMap: + sizes.mmap_bytes += bytes; + break; + } + } + } +} + +void ASTReader::InitializeSema(Sema &S) { + SemaObj = &S; + S.addExternalSource(this); + + // Makes sure any declarations that were deserialized "too early" + // still get added to the identifier's declaration chains. + for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { + pushExternalDeclIntoScope(PreloadedDecls[I], + PreloadedDecls[I]->getDeclName()); + } + PreloadedDecls.clear(); + + // FIXME: What happens if these are changed by a module import? + if (!FPPragmaOptions.empty()) { + assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); + SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; + } + + // FIXME: What happens if these are changed by a module import? + if (!OpenCLExtensions.empty()) { + unsigned I = 0; +#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; +#include "clang/Basic/OpenCLExtensions.def" + + assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); + } + + UpdateSema(); +} + +void ASTReader::UpdateSema() { + assert(SemaObj && "no Sema to update"); + + // Load the offsets of the declarations that Sema references. + // They will be lazily deserialized when needed. + if (!SemaDeclRefs.empty()) { + assert(SemaDeclRefs.size() % 2 == 0); + for (unsigned I = 0; I != SemaDeclRefs.size(); I += 2) { + if (!SemaObj->StdNamespace) + SemaObj->StdNamespace = SemaDeclRefs[I]; + if (!SemaObj->StdBadAlloc) + SemaObj->StdBadAlloc = SemaDeclRefs[I+1]; + } + SemaDeclRefs.clear(); + } +} + +IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { + // Note that we are loading an identifier. + Deserializing AnIdentifier(this); + StringRef Name(NameStart, NameEnd - NameStart); + + // If there is a global index, look there first to determine which modules + // provably do not have any results for this identifier. + GlobalModuleIndex::HitSet Hits; + GlobalModuleIndex::HitSet *HitsPtr = 0; + if (!loadGlobalIndex()) { + if (GlobalIndex->lookupIdentifier(Name, Hits)) { + HitsPtr = &Hits; + } + } + IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0, + NumIdentifierLookups, + NumIdentifierLookupHits); + ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor, HitsPtr); + IdentifierInfo *II = Visitor.getIdentifierInfo(); + markIdentifierUpToDate(II); + return II; +} + +namespace clang { + /// \brief An identifier-lookup iterator that enumerates all of the + /// identifiers stored within a set of AST files. + class ASTIdentifierIterator : public IdentifierIterator { + /// \brief The AST reader whose identifiers are being enumerated. + const ASTReader &Reader; + + /// \brief The current index into the chain of AST files stored in + /// the AST reader. + unsigned Index; + + /// \brief The current position within the identifier lookup table + /// of the current AST file. + ASTIdentifierLookupTable::key_iterator Current; + + /// \brief The end position within the identifier lookup table of + /// the current AST file. + ASTIdentifierLookupTable::key_iterator End; + + public: + explicit ASTIdentifierIterator(const ASTReader &Reader); + + virtual StringRef Next(); + }; +} + +ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) + : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) { + ASTIdentifierLookupTable *IdTable + = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable; + Current = IdTable->key_begin(); + End = IdTable->key_end(); +} + +StringRef ASTIdentifierIterator::Next() { + while (Current == End) { + // If we have exhausted all of our AST files, we're done. + if (Index == 0) + return StringRef(); + + --Index; + ASTIdentifierLookupTable *IdTable + = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index]. + IdentifierLookupTable; + Current = IdTable->key_begin(); + End = IdTable->key_end(); + } + + // We have any identifiers remaining in the current AST file; return + // the next one. + StringRef Result = *Current; + ++Current; + return Result; +} + +IdentifierIterator *ASTReader::getIdentifiers() { + if (!loadGlobalIndex()) + return GlobalIndex->createIdentifierIterator(); + + return new ASTIdentifierIterator(*this); +} + +namespace clang { namespace serialization { + class ReadMethodPoolVisitor { + ASTReader &Reader; + Selector Sel; + unsigned PriorGeneration; + unsigned InstanceBits; + unsigned FactoryBits; + SmallVector<ObjCMethodDecl *, 4> InstanceMethods; + SmallVector<ObjCMethodDecl *, 4> FactoryMethods; + + public: + ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel, + unsigned PriorGeneration) + : Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration), + InstanceBits(0), FactoryBits(0) { } + + static bool visit(ModuleFile &M, void *UserData) { + ReadMethodPoolVisitor *This + = static_cast<ReadMethodPoolVisitor *>(UserData); + + if (!M.SelectorLookupTable) + return false; + + // If we've already searched this module file, skip it now. + if (M.Generation <= This->PriorGeneration) + return true; + + ++This->Reader.NumMethodPoolTableLookups; + ASTSelectorLookupTable *PoolTable + = (ASTSelectorLookupTable*)M.SelectorLookupTable; + ASTSelectorLookupTable::iterator Pos = PoolTable->find(This->Sel); + if (Pos == PoolTable->end()) + return false; + + ++This->Reader.NumMethodPoolTableHits; + ++This->Reader.NumSelectorsRead; + // FIXME: Not quite happy with the statistics here. We probably should + // disable this tracking when called via LoadSelector. + // Also, should entries without methods count as misses? + ++This->Reader.NumMethodPoolEntriesRead; + ASTSelectorLookupTrait::data_type Data = *Pos; + if (This->Reader.DeserializationListener) + This->Reader.DeserializationListener->SelectorRead(Data.ID, + This->Sel); + + This->InstanceMethods.append(Data.Instance.begin(), Data.Instance.end()); + This->FactoryMethods.append(Data.Factory.begin(), Data.Factory.end()); + This->InstanceBits = Data.InstanceBits; + This->FactoryBits = Data.FactoryBits; + return true; + } + + /// \brief Retrieve the instance methods found by this visitor. + ArrayRef<ObjCMethodDecl *> getInstanceMethods() const { + return InstanceMethods; + } + + /// \brief Retrieve the instance methods found by this visitor. + ArrayRef<ObjCMethodDecl *> getFactoryMethods() const { + return FactoryMethods; + } + + unsigned getInstanceBits() const { return InstanceBits; } + unsigned getFactoryBits() const { return FactoryBits; } + }; +} } // end namespace clang::serialization + +/// \brief Add the given set of methods to the method list. +static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods, + ObjCMethodList &List) { + for (unsigned I = 0, N = Methods.size(); I != N; ++I) { + S.addMethodToGlobalList(&List, Methods[I]); + } +} + +void ASTReader::ReadMethodPool(Selector Sel) { + // Get the selector generation and update it to the current generation. + unsigned &Generation = SelectorGeneration[Sel]; + unsigned PriorGeneration = Generation; + Generation = CurrentGeneration; + + // Search for methods defined with this selector. + ++NumMethodPoolLookups; + ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration); + ModuleMgr.visit(&ReadMethodPoolVisitor::visit, &Visitor); + + if (Visitor.getInstanceMethods().empty() && + Visitor.getFactoryMethods().empty()) + return; + + ++NumMethodPoolHits; + + if (!getSema()) + return; + + Sema &S = *getSema(); + Sema::GlobalMethodPool::iterator Pos + = S.MethodPool.insert(std::make_pair(Sel, Sema::GlobalMethods())).first; + + addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first); + addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second); + Pos->second.first.setBits(Visitor.getInstanceBits()); + Pos->second.second.setBits(Visitor.getFactoryBits()); +} + +void ASTReader::ReadKnownNamespaces( + SmallVectorImpl<NamespaceDecl *> &Namespaces) { + Namespaces.clear(); + + for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) { + if (NamespaceDecl *Namespace + = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I]))) + Namespaces.push_back(Namespace); + } +} + +void ASTReader::ReadUndefinedButUsed( + llvm::DenseMap<NamedDecl*, SourceLocation> &Undefined) { + for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) { + NamedDecl *D = cast<NamedDecl>(GetDecl(UndefinedButUsed[Idx++])); + SourceLocation Loc = + SourceLocation::getFromRawEncoding(UndefinedButUsed[Idx++]); + Undefined.insert(std::make_pair(D, Loc)); + } +} + +void ASTReader::ReadTentativeDefinitions( + SmallVectorImpl<VarDecl *> &TentativeDefs) { + for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { + VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I])); + if (Var) + TentativeDefs.push_back(Var); + } + TentativeDefinitions.clear(); +} + +void ASTReader::ReadUnusedFileScopedDecls( + SmallVectorImpl<const DeclaratorDecl *> &Decls) { + for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { + DeclaratorDecl *D + = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); + if (D) + Decls.push_back(D); + } + UnusedFileScopedDecls.clear(); +} + +void ASTReader::ReadDelegatingConstructors( + SmallVectorImpl<CXXConstructorDecl *> &Decls) { + for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) { + CXXConstructorDecl *D + = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I])); + if (D) + Decls.push_back(D); + } + DelegatingCtorDecls.clear(); +} + +void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) { + for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) { + TypedefNameDecl *D + = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I])); + if (D) + Decls.push_back(D); + } + ExtVectorDecls.clear(); +} + +void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) { + for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) { + CXXRecordDecl *D + = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I])); + if (D) + Decls.push_back(D); + } + DynamicClasses.clear(); +} + +void +ASTReader::ReadLocallyScopedExternCDecls(SmallVectorImpl<NamedDecl *> &Decls) { + for (unsigned I = 0, N = LocallyScopedExternCDecls.size(); I != N; ++I) { + NamedDecl *D + = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternCDecls[I])); + if (D) + Decls.push_back(D); + } + LocallyScopedExternCDecls.clear(); +} + +void ASTReader::ReadReferencedSelectors( + SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) { + if (ReferencedSelectorsData.empty()) + return; + + // If there are @selector references added them to its pool. This is for + // implementation of -Wselector. + unsigned int DataSize = ReferencedSelectorsData.size()-1; + unsigned I = 0; + while (I < DataSize) { + Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); + SourceLocation SelLoc + = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); + Sels.push_back(std::make_pair(Sel, SelLoc)); + } + ReferencedSelectorsData.clear(); +} + +void ASTReader::ReadWeakUndeclaredIdentifiers( + SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) { + if (WeakUndeclaredIdentifiers.empty()) + return; + + for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) { + IdentifierInfo *WeakId + = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); + IdentifierInfo *AliasId + = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); + SourceLocation Loc + = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]); + bool Used = WeakUndeclaredIdentifiers[I++]; + WeakInfo WI(AliasId, Loc); + WI.setUsed(Used); + WeakIDs.push_back(std::make_pair(WeakId, WI)); + } + WeakUndeclaredIdentifiers.clear(); +} + +void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) { + for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) { + ExternalVTableUse VT; + VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); + VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]); + VT.DefinitionRequired = VTableUses[Idx++]; + VTables.push_back(VT); + } + + VTableUses.clear(); +} + +void ASTReader::ReadPendingInstantiations( + SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) { + for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) { + ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++])); + SourceLocation Loc + = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]); + + Pending.push_back(std::make_pair(D, Loc)); + } + PendingInstantiations.clear(); +} + +void ASTReader::ReadLateParsedTemplates( + llvm::DenseMap<const FunctionDecl *, LateParsedTemplate *> &LPTMap) { + for (unsigned Idx = 0, N = LateParsedTemplates.size(); Idx < N; + /* In loop */) { + FunctionDecl *FD = cast<FunctionDecl>(GetDecl(LateParsedTemplates[Idx++])); + + LateParsedTemplate *LT = new LateParsedTemplate; + LT->D = GetDecl(LateParsedTemplates[Idx++]); + + ModuleFile *F = getOwningModuleFile(LT->D); + assert(F && "No module"); + + unsigned TokN = LateParsedTemplates[Idx++]; + LT->Toks.reserve(TokN); + for (unsigned T = 0; T < TokN; ++T) + LT->Toks.push_back(ReadToken(*F, LateParsedTemplates, Idx)); + + LPTMap[FD] = LT; + } + + LateParsedTemplates.clear(); +} + +void ASTReader::LoadSelector(Selector Sel) { + // It would be complicated to avoid reading the methods anyway. So don't. + ReadMethodPool(Sel); +} + +void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) { + assert(ID && "Non-zero identifier ID required"); + assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); + IdentifiersLoaded[ID - 1] = II; + if (DeserializationListener) + DeserializationListener->IdentifierRead(ID, II); +} + +/// \brief Set the globally-visible declarations associated with the given +/// identifier. +/// +/// If the AST reader is currently in a state where the given declaration IDs +/// cannot safely be resolved, they are queued until it is safe to resolve +/// them. +/// +/// \param II an IdentifierInfo that refers to one or more globally-visible +/// declarations. +/// +/// \param DeclIDs the set of declaration IDs with the name @p II that are +/// visible at global scope. +/// +/// \param Decls if non-null, this vector will be populated with the set of +/// deserialized declarations. These declarations will not be pushed into +/// scope. +void +ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, + const SmallVectorImpl<uint32_t> &DeclIDs, + SmallVectorImpl<Decl *> *Decls) { + if (NumCurrentElementsDeserializing && !Decls) { + PendingIdentifierInfos[II].append(DeclIDs.begin(), DeclIDs.end()); + return; + } + + for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { + NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); + if (SemaObj) { + // If we're simply supposed to record the declarations, do so now. + if (Decls) { + Decls->push_back(D); + continue; + } + + // Introduce this declaration into the translation-unit scope + // and add it to the declaration chain for this identifier, so + // that (unqualified) name lookup will find it. + pushExternalDeclIntoScope(D, II); + } else { + // Queue this declaration so that it will be added to the + // translation unit scope and identifier's declaration chain + // once a Sema object is known. + PreloadedDecls.push_back(D); + } + } +} + +IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) { + if (ID == 0) + return 0; + + if (IdentifiersLoaded.empty()) { + Error("no identifier table in AST file"); + return 0; + } + + ID -= 1; + if (!IdentifiersLoaded[ID]) { + GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1); + assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map"); + ModuleFile *M = I->second; + unsigned Index = ID - M->BaseIdentifierID; + const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index]; + + // All of the strings in the AST file are preceded by a 16-bit length. + // Extract that 16-bit length to avoid having to execute strlen(). + // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as + // unsigned integers. This is important to avoid integer overflow when + // we cast them to 'unsigned'. + const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; + unsigned StrLen = (((unsigned) StrLenPtr[0]) + | (((unsigned) StrLenPtr[1]) << 8)) - 1; + IdentifiersLoaded[ID] + = &PP.getIdentifierTable().get(StringRef(Str, StrLen)); + if (DeserializationListener) + DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); + } + + return IdentifiersLoaded[ID]; +} + +IdentifierInfo *ASTReader::getLocalIdentifier(ModuleFile &M, unsigned LocalID) { + return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID)); +} + +IdentifierID ASTReader::getGlobalIdentifierID(ModuleFile &M, unsigned LocalID) { + if (LocalID < NUM_PREDEF_IDENT_IDS) + return LocalID; + + ContinuousRangeMap<uint32_t, int, 2>::iterator I + = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS); + assert(I != M.IdentifierRemap.end() + && "Invalid index into identifier index remap"); + + return LocalID + I->second; +} + +MacroInfo *ASTReader::getMacro(MacroID ID) { + if (ID == 0) + return 0; + + if (MacrosLoaded.empty()) { + Error("no macro table in AST file"); + return 0; + } + + ID -= NUM_PREDEF_MACRO_IDS; + if (!MacrosLoaded[ID]) { + GlobalMacroMapType::iterator I + = GlobalMacroMap.find(ID + NUM_PREDEF_MACRO_IDS); + assert(I != GlobalMacroMap.end() && "Corrupted global macro map"); + ModuleFile *M = I->second; + unsigned Index = ID - M->BaseMacroID; + MacrosLoaded[ID] = ReadMacroRecord(*M, M->MacroOffsets[Index]); + + if (DeserializationListener) + DeserializationListener->MacroRead(ID + NUM_PREDEF_MACRO_IDS, + MacrosLoaded[ID]); + } + + return MacrosLoaded[ID]; +} + +MacroID ASTReader::getGlobalMacroID(ModuleFile &M, unsigned LocalID) { + if (LocalID < NUM_PREDEF_MACRO_IDS) + return LocalID; + + ContinuousRangeMap<uint32_t, int, 2>::iterator I + = M.MacroRemap.find(LocalID - NUM_PREDEF_MACRO_IDS); + assert(I != M.MacroRemap.end() && "Invalid index into macro index remap"); + + return LocalID + I->second; +} + +serialization::SubmoduleID +ASTReader::getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID) { + if (LocalID < NUM_PREDEF_SUBMODULE_IDS) + return LocalID; + + ContinuousRangeMap<uint32_t, int, 2>::iterator I + = M.SubmoduleRemap.find(LocalID - NUM_PREDEF_SUBMODULE_IDS); + assert(I != M.SubmoduleRemap.end() + && "Invalid index into submodule index remap"); + + return LocalID + I->second; +} + +Module *ASTReader::getSubmodule(SubmoduleID GlobalID) { + if (GlobalID < NUM_PREDEF_SUBMODULE_IDS) { + assert(GlobalID == 0 && "Unhandled global submodule ID"); + return 0; + } + + if (GlobalID > SubmodulesLoaded.size()) { + Error("submodule ID out of range in AST file"); + return 0; + } + + return SubmodulesLoaded[GlobalID - NUM_PREDEF_SUBMODULE_IDS]; +} + +Module *ASTReader::getModule(unsigned ID) { + return getSubmodule(ID); +} + +Selector ASTReader::getLocalSelector(ModuleFile &M, unsigned LocalID) { + return DecodeSelector(getGlobalSelectorID(M, LocalID)); +} + +Selector ASTReader::DecodeSelector(serialization::SelectorID ID) { + if (ID == 0) + return Selector(); + + if (ID > SelectorsLoaded.size()) { + Error("selector ID out of range in AST file"); + return Selector(); + } + + if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { + // Load this selector from the selector table. + GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID); + assert(I != GlobalSelectorMap.end() && "Corrupted global selector map"); + ModuleFile &M = *I->second; + ASTSelectorLookupTrait Trait(*this, M); + unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS; + SelectorsLoaded[ID - 1] = + Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0); + if (DeserializationListener) + DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); + } + + return SelectorsLoaded[ID - 1]; +} + +Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) { + return DecodeSelector(ID); +} + +uint32_t ASTReader::GetNumExternalSelectors() { + // ID 0 (the null selector) is considered an external selector. + return getTotalNumSelectors() + 1; +} + +serialization::SelectorID +ASTReader::getGlobalSelectorID(ModuleFile &M, unsigned LocalID) const { + if (LocalID < NUM_PREDEF_SELECTOR_IDS) + return LocalID; + + ContinuousRangeMap<uint32_t, int, 2>::iterator I + = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS); + assert(I != M.SelectorRemap.end() + && "Invalid index into selector index remap"); + + return LocalID + I->second; +} + +DeclarationName +ASTReader::ReadDeclarationName(ModuleFile &F, + const RecordData &Record, unsigned &Idx) { + DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; + switch (Kind) { + case DeclarationName::Identifier: + return DeclarationName(GetIdentifierInfo(F, Record, Idx)); + + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + return DeclarationName(ReadSelector(F, Record, Idx)); + + case DeclarationName::CXXConstructorName: + return Context.DeclarationNames.getCXXConstructorName( + Context.getCanonicalType(readType(F, Record, Idx))); + + case DeclarationName::CXXDestructorName: + return Context.DeclarationNames.getCXXDestructorName( + Context.getCanonicalType(readType(F, Record, Idx))); + + case DeclarationName::CXXConversionFunctionName: + return Context.DeclarationNames.getCXXConversionFunctionName( + Context.getCanonicalType(readType(F, Record, Idx))); + + case DeclarationName::CXXOperatorName: + return Context.DeclarationNames.getCXXOperatorName( + (OverloadedOperatorKind)Record[Idx++]); + + case DeclarationName::CXXLiteralOperatorName: + return Context.DeclarationNames.getCXXLiteralOperatorName( + GetIdentifierInfo(F, Record, Idx)); + + case DeclarationName::CXXUsingDirective: + return DeclarationName::getUsingDirectiveName(); + } + + llvm_unreachable("Invalid NameKind!"); +} + +void ASTReader::ReadDeclarationNameLoc(ModuleFile &F, + DeclarationNameLoc &DNLoc, + DeclarationName Name, + const RecordData &Record, unsigned &Idx) { + switch (Name.getNameKind()) { + case DeclarationName::CXXConstructorName: + case DeclarationName::CXXDestructorName: + case DeclarationName::CXXConversionFunctionName: + DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); + break; + + case DeclarationName::CXXOperatorName: + DNLoc.CXXOperatorName.BeginOpNameLoc + = ReadSourceLocation(F, Record, Idx).getRawEncoding(); + DNLoc.CXXOperatorName.EndOpNameLoc + = ReadSourceLocation(F, Record, Idx).getRawEncoding(); + break; + + case DeclarationName::CXXLiteralOperatorName: + DNLoc.CXXLiteralOperatorName.OpNameLoc + = ReadSourceLocation(F, Record, Idx).getRawEncoding(); + break; + + case DeclarationName::Identifier: + case DeclarationName::ObjCZeroArgSelector: + case DeclarationName::ObjCOneArgSelector: + case DeclarationName::ObjCMultiArgSelector: + case DeclarationName::CXXUsingDirective: + break; + } +} + +void ASTReader::ReadDeclarationNameInfo(ModuleFile &F, + DeclarationNameInfo &NameInfo, + const RecordData &Record, unsigned &Idx) { + NameInfo.setName(ReadDeclarationName(F, Record, Idx)); + NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); + DeclarationNameLoc DNLoc; + ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); + NameInfo.setInfo(DNLoc); +} + +void ASTReader::ReadQualifierInfo(ModuleFile &F, QualifierInfo &Info, + const RecordData &Record, unsigned &Idx) { + Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); + unsigned NumTPLists = Record[Idx++]; + Info.NumTemplParamLists = NumTPLists; + if (NumTPLists) { + Info.TemplParamLists = new (Context) TemplateParameterList*[NumTPLists]; + for (unsigned i=0; i != NumTPLists; ++i) + Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); + } +} + +TemplateName +ASTReader::ReadTemplateName(ModuleFile &F, const RecordData &Record, + unsigned &Idx) { + TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; + switch (Kind) { + case TemplateName::Template: + return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx)); + + case TemplateName::OverloadedTemplate: { + unsigned size = Record[Idx++]; + UnresolvedSet<8> Decls; + while (size--) + Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx)); + + return Context.getOverloadedTemplateName(Decls.begin(), Decls.end()); + } + + case TemplateName::QualifiedTemplate: { + NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); + bool hasTemplKeyword = Record[Idx++]; + TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx); + return Context.getQualifiedTemplateName(NNS, hasTemplKeyword, Template); + } + + case TemplateName::DependentTemplate: { + NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); + if (Record[Idx++]) // isIdentifier + return Context.getDependentTemplateName(NNS, + GetIdentifierInfo(F, Record, + Idx)); + return Context.getDependentTemplateName(NNS, + (OverloadedOperatorKind)Record[Idx++]); + } + + case TemplateName::SubstTemplateTemplateParm: { + TemplateTemplateParmDecl *param + = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); + if (!param) return TemplateName(); + TemplateName replacement = ReadTemplateName(F, Record, Idx); + return Context.getSubstTemplateTemplateParm(param, replacement); + } + + case TemplateName::SubstTemplateTemplateParmPack: { + TemplateTemplateParmDecl *Param + = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); + if (!Param) + return TemplateName(); + + TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); + if (ArgPack.getKind() != TemplateArgument::Pack) + return TemplateName(); + + return Context.getSubstTemplateTemplateParmPack(Param, ArgPack); + } + } + + llvm_unreachable("Unhandled template name kind!"); +} + +TemplateArgument +ASTReader::ReadTemplateArgument(ModuleFile &F, + const RecordData &Record, unsigned &Idx) { + TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; + switch (Kind) { + case TemplateArgument::Null: + return TemplateArgument(); + case TemplateArgument::Type: + return TemplateArgument(readType(F, Record, Idx)); + case TemplateArgument::Declaration: { + ValueDecl *D = ReadDeclAs<ValueDecl>(F, Record, Idx); + bool ForReferenceParam = Record[Idx++]; + return TemplateArgument(D, ForReferenceParam); + } + case TemplateArgument::NullPtr: + return TemplateArgument(readType(F, Record, Idx), /*isNullPtr*/true); + case TemplateArgument::Integral: { + llvm::APSInt Value = ReadAPSInt(Record, Idx); + QualType T = readType(F, Record, Idx); + return TemplateArgument(Context, Value, T); + } + case TemplateArgument::Template: + return TemplateArgument(ReadTemplateName(F, Record, Idx)); + case TemplateArgument::TemplateExpansion: { + TemplateName Name = ReadTemplateName(F, Record, Idx); + Optional<unsigned> NumTemplateExpansions; + if (unsigned NumExpansions = Record[Idx++]) + NumTemplateExpansions = NumExpansions - 1; + return TemplateArgument(Name, NumTemplateExpansions); + } + case TemplateArgument::Expression: + return TemplateArgument(ReadExpr(F)); + case TemplateArgument::Pack: { + unsigned NumArgs = Record[Idx++]; + TemplateArgument *Args = new (Context) TemplateArgument[NumArgs]; + for (unsigned I = 0; I != NumArgs; ++I) + Args[I] = ReadTemplateArgument(F, Record, Idx); + return TemplateArgument(Args, NumArgs); + } + } + + llvm_unreachable("Unhandled template argument kind!"); +} + +TemplateParameterList * +ASTReader::ReadTemplateParameterList(ModuleFile &F, + const RecordData &Record, unsigned &Idx) { + SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); + SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); + SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); + + unsigned NumParams = Record[Idx++]; + SmallVector<NamedDecl *, 16> Params; + Params.reserve(NumParams); + while (NumParams--) + Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx)); + + TemplateParameterList* TemplateParams = + TemplateParameterList::Create(Context, TemplateLoc, LAngleLoc, + Params.data(), Params.size(), RAngleLoc); + return TemplateParams; +} + +void +ASTReader:: +ReadTemplateArgumentList(SmallVectorImpl<TemplateArgument> &TemplArgs, + ModuleFile &F, const RecordData &Record, + unsigned &Idx) { + unsigned NumTemplateArgs = Record[Idx++]; + TemplArgs.reserve(NumTemplateArgs); + while (NumTemplateArgs--) + TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); +} + +/// \brief Read a UnresolvedSet structure. +void ASTReader::ReadUnresolvedSet(ModuleFile &F, LazyASTUnresolvedSet &Set, + const RecordData &Record, unsigned &Idx) { + unsigned NumDecls = Record[Idx++]; + Set.reserve(Context, NumDecls); + while (NumDecls--) { + DeclID ID = ReadDeclID(F, Record, Idx); + AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; + Set.addLazyDecl(Context, ID, AS); + } +} + +CXXBaseSpecifier +ASTReader::ReadCXXBaseSpecifier(ModuleFile &F, + const RecordData &Record, unsigned &Idx) { + bool isVirtual = static_cast<bool>(Record[Idx++]); + bool isBaseOfClass = static_cast<bool>(Record[Idx++]); + AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); + bool inheritConstructors = static_cast<bool>(Record[Idx++]); + TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); + SourceRange Range = ReadSourceRange(F, Record, Idx); + SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); + CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, + EllipsisLoc); + Result.setInheritConstructors(inheritConstructors); + return Result; +} + +std::pair<CXXCtorInitializer **, unsigned> +ASTReader::ReadCXXCtorInitializers(ModuleFile &F, const RecordData &Record, + unsigned &Idx) { + CXXCtorInitializer **CtorInitializers = 0; + unsigned NumInitializers = Record[Idx++]; + if (NumInitializers) { + CtorInitializers + = new (Context) CXXCtorInitializer*[NumInitializers]; + for (unsigned i=0; i != NumInitializers; ++i) { + TypeSourceInfo *TInfo = 0; + bool IsBaseVirtual = false; + FieldDecl *Member = 0; + IndirectFieldDecl *IndirectMember = 0; + + CtorInitializerType Type = (CtorInitializerType)Record[Idx++]; + switch (Type) { + case CTOR_INITIALIZER_BASE: + TInfo = GetTypeSourceInfo(F, Record, Idx); + IsBaseVirtual = Record[Idx++]; + break; + + case CTOR_INITIALIZER_DELEGATING: + TInfo = GetTypeSourceInfo(F, Record, Idx); + break; + + case CTOR_INITIALIZER_MEMBER: + Member = ReadDeclAs<FieldDecl>(F, Record, Idx); + break; + + case CTOR_INITIALIZER_INDIRECT_MEMBER: + IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx); + break; + } + + SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); + Expr *Init = ReadExpr(F); + SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); + SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); + bool IsWritten = Record[Idx++]; + unsigned SourceOrderOrNumArrayIndices; + SmallVector<VarDecl *, 8> Indices; + if (IsWritten) { + SourceOrderOrNumArrayIndices = Record[Idx++]; + } else { + SourceOrderOrNumArrayIndices = Record[Idx++]; + Indices.reserve(SourceOrderOrNumArrayIndices); + for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) + Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx)); + } + + CXXCtorInitializer *BOMInit; + if (Type == CTOR_INITIALIZER_BASE) { + BOMInit = new (Context) CXXCtorInitializer(Context, TInfo, IsBaseVirtual, + LParenLoc, Init, RParenLoc, + MemberOrEllipsisLoc); + } else if (Type == CTOR_INITIALIZER_DELEGATING) { + BOMInit = new (Context) CXXCtorInitializer(Context, TInfo, LParenLoc, + Init, RParenLoc); + } else if (IsWritten) { + if (Member) + BOMInit = new (Context) CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc, + LParenLoc, Init, RParenLoc); + else + BOMInit = new (Context) CXXCtorInitializer(Context, IndirectMember, + MemberOrEllipsisLoc, LParenLoc, + Init, RParenLoc); + } else { + if (IndirectMember) { + assert(Indices.empty() && "Indirect field improperly initialized"); + BOMInit = new (Context) CXXCtorInitializer(Context, IndirectMember, + MemberOrEllipsisLoc, LParenLoc, + Init, RParenLoc); + } else { + BOMInit = CXXCtorInitializer::Create(Context, Member, MemberOrEllipsisLoc, + LParenLoc, Init, RParenLoc, + Indices.data(), Indices.size()); + } + } + + if (IsWritten) + BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); + CtorInitializers[i] = BOMInit; + } + } + + return std::make_pair(CtorInitializers, NumInitializers); +} + +NestedNameSpecifier * +ASTReader::ReadNestedNameSpecifier(ModuleFile &F, + const RecordData &Record, unsigned &Idx) { + unsigned N = Record[Idx++]; + NestedNameSpecifier *NNS = 0, *Prev = 0; + for (unsigned I = 0; I != N; ++I) { + NestedNameSpecifier::SpecifierKind Kind + = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; + switch (Kind) { + case NestedNameSpecifier::Identifier: { + IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); + NNS = NestedNameSpecifier::Create(Context, Prev, II); + break; + } + + case NestedNameSpecifier::Namespace: { + NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); + NNS = NestedNameSpecifier::Create(Context, Prev, NS); + break; + } + + case NestedNameSpecifier::NamespaceAlias: { + NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); + NNS = NestedNameSpecifier::Create(Context, Prev, Alias); + break; + } + + case NestedNameSpecifier::TypeSpec: + case NestedNameSpecifier::TypeSpecWithTemplate: { + const Type *T = readType(F, Record, Idx).getTypePtrOrNull(); + if (!T) + return 0; + + bool Template = Record[Idx++]; + NNS = NestedNameSpecifier::Create(Context, Prev, Template, T); + break; + } + + case NestedNameSpecifier::Global: { + NNS = NestedNameSpecifier::GlobalSpecifier(Context); + // No associated value, and there can't be a prefix. + break; + } + } + Prev = NNS; + } + return NNS; +} + +NestedNameSpecifierLoc +ASTReader::ReadNestedNameSpecifierLoc(ModuleFile &F, const RecordData &Record, + unsigned &Idx) { + unsigned N = Record[Idx++]; + NestedNameSpecifierLocBuilder Builder; + for (unsigned I = 0; I != N; ++I) { + NestedNameSpecifier::SpecifierKind Kind + = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; + switch (Kind) { + case NestedNameSpecifier::Identifier: { + IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); + SourceRange Range = ReadSourceRange(F, Record, Idx); + Builder.Extend(Context, II, Range.getBegin(), Range.getEnd()); + break; + } + + case NestedNameSpecifier::Namespace: { + NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); + SourceRange Range = ReadSourceRange(F, Record, Idx); + Builder.Extend(Context, NS, Range.getBegin(), Range.getEnd()); + break; + } + + case NestedNameSpecifier::NamespaceAlias: { + NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); + SourceRange Range = ReadSourceRange(F, Record, Idx); + Builder.Extend(Context, Alias, Range.getBegin(), Range.getEnd()); + break; + } + + case NestedNameSpecifier::TypeSpec: + case NestedNameSpecifier::TypeSpecWithTemplate: { + bool Template = Record[Idx++]; + TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); + if (!T) + return NestedNameSpecifierLoc(); + SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); + + // FIXME: 'template' keyword location not saved anywhere, so we fake it. + Builder.Extend(Context, + Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), + T->getTypeLoc(), ColonColonLoc); + break; + } + + case NestedNameSpecifier::Global: { + SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); + Builder.MakeGlobal(Context, ColonColonLoc); + break; + } + } + } + + return Builder.getWithLocInContext(Context); +} + +SourceRange +ASTReader::ReadSourceRange(ModuleFile &F, const RecordData &Record, + unsigned &Idx) { + SourceLocation beg = ReadSourceLocation(F, Record, Idx); + SourceLocation end = ReadSourceLocation(F, Record, Idx); + return SourceRange(beg, end); +} + +/// \brief Read an integral value +llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { + unsigned BitWidth = Record[Idx++]; + unsigned NumWords = llvm::APInt::getNumWords(BitWidth); + llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); + Idx += NumWords; + return Result; +} + +/// \brief Read a signed integral value +llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { + bool isUnsigned = Record[Idx++]; + return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); +} + +/// \brief Read a floating-point value +llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, + const llvm::fltSemantics &Sem, + unsigned &Idx) { + return llvm::APFloat(Sem, ReadAPInt(Record, Idx)); +} + +// \brief Read a string +std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { + unsigned Len = Record[Idx++]; + std::string Result(Record.data() + Idx, Record.data() + Idx + Len); + Idx += Len; + return Result; +} + +VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record, + unsigned &Idx) { + unsigned Major = Record[Idx++]; + unsigned Minor = Record[Idx++]; + unsigned Subminor = Record[Idx++]; + if (Minor == 0) + return VersionTuple(Major); + if (Subminor == 0) + return VersionTuple(Major, Minor - 1); + return VersionTuple(Major, Minor - 1, Subminor - 1); +} + +CXXTemporary *ASTReader::ReadCXXTemporary(ModuleFile &F, + const RecordData &Record, + unsigned &Idx) { + CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx); + return CXXTemporary::Create(Context, Decl); +} + +DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { + return Diag(CurrentImportLoc, DiagID); +} + +DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { + return Diags.Report(Loc, DiagID); +} + +/// \brief Retrieve the identifier table associated with the +/// preprocessor. +IdentifierTable &ASTReader::getIdentifierTable() { + return PP.getIdentifierTable(); +} + +/// \brief Record that the given ID maps to the given switch-case +/// statement. +void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { + assert((*CurrSwitchCaseStmts)[ID] == 0 && + "Already have a SwitchCase with this ID"); + (*CurrSwitchCaseStmts)[ID] = SC; +} + +/// \brief Retrieve the switch-case statement with the given ID. +SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { + assert((*CurrSwitchCaseStmts)[ID] != 0 && "No SwitchCase with this ID"); + return (*CurrSwitchCaseStmts)[ID]; +} + +void ASTReader::ClearSwitchCaseIDs() { + CurrSwitchCaseStmts->clear(); +} + +void ASTReader::ReadComments() { + std::vector<RawComment *> Comments; + for (SmallVectorImpl<std::pair<BitstreamCursor, + serialization::ModuleFile *> >::iterator + I = CommentsCursors.begin(), + E = CommentsCursors.end(); + I != E; ++I) { + BitstreamCursor &Cursor = I->first; + serialization::ModuleFile &F = *I->second; + SavedStreamPosition SavedPosition(Cursor); + + RecordData Record; + while (true) { + llvm::BitstreamEntry Entry = + Cursor.advanceSkippingSubblocks(BitstreamCursor::AF_DontPopBlockAtEnd); + + switch (Entry.Kind) { + case llvm::BitstreamEntry::SubBlock: // Handled for us already. + case llvm::BitstreamEntry::Error: + Error("malformed block record in AST file"); + return; + case llvm::BitstreamEntry::EndBlock: + goto NextCursor; + case llvm::BitstreamEntry::Record: + // The interesting case. + break; + } + + // Read a record. + Record.clear(); + switch ((CommentRecordTypes)Cursor.readRecord(Entry.ID, Record)) { + case COMMENTS_RAW_COMMENT: { + unsigned Idx = 0; + SourceRange SR = ReadSourceRange(F, Record, Idx); + RawComment::CommentKind Kind = + (RawComment::CommentKind) Record[Idx++]; + bool IsTrailingComment = Record[Idx++]; + bool IsAlmostTrailingComment = Record[Idx++]; + Comments.push_back(new (Context) RawComment( + SR, Kind, IsTrailingComment, IsAlmostTrailingComment, + Context.getLangOpts().CommentOpts.ParseAllComments)); + break; + } + } + } + NextCursor:; + } + Context.Comments.addCommentsToFront(Comments); +} + +void ASTReader::finishPendingActions() { + while (!PendingIdentifierInfos.empty() || !PendingDeclChains.empty() || + !PendingMacroIDs.empty() || !PendingDeclContextInfos.empty() || + !PendingOdrMergeChecks.empty()) { + // If any identifiers with corresponding top-level declarations have + // been loaded, load those declarations now. + typedef llvm::DenseMap<IdentifierInfo *, SmallVector<Decl *, 2> > + TopLevelDeclsMap; + TopLevelDeclsMap TopLevelDecls; + + while (!PendingIdentifierInfos.empty()) { + // FIXME: std::move + IdentifierInfo *II = PendingIdentifierInfos.back().first; + SmallVector<uint32_t, 4> DeclIDs = PendingIdentifierInfos.back().second; + PendingIdentifierInfos.pop_back(); + + SetGloballyVisibleDecls(II, DeclIDs, &TopLevelDecls[II]); + } + + // Load pending declaration chains. + for (unsigned I = 0; I != PendingDeclChains.size(); ++I) { + loadPendingDeclChain(PendingDeclChains[I]); + PendingDeclChainsKnown.erase(PendingDeclChains[I]); + } + PendingDeclChains.clear(); + + // Make the most recent of the top-level declarations visible. + for (TopLevelDeclsMap::iterator TLD = TopLevelDecls.begin(), + TLDEnd = TopLevelDecls.end(); TLD != TLDEnd; ++TLD) { + IdentifierInfo *II = TLD->first; + for (unsigned I = 0, N = TLD->second.size(); I != N; ++I) { + pushExternalDeclIntoScope(cast<NamedDecl>(TLD->second[I]), II); + } + } + + // Load any pending macro definitions. + for (unsigned I = 0; I != PendingMacroIDs.size(); ++I) { + IdentifierInfo *II = PendingMacroIDs.begin()[I].first; + SmallVector<PendingMacroInfo, 2> GlobalIDs; + GlobalIDs.swap(PendingMacroIDs.begin()[I].second); + // Initialize the macro history from chained-PCHs ahead of module imports. + for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs; + ++IDIdx) { + const PendingMacroInfo &Info = GlobalIDs[IDIdx]; + if (Info.M->Kind != MK_Module) + resolvePendingMacro(II, Info); + } + // Handle module imports. + for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs; + ++IDIdx) { + const PendingMacroInfo &Info = GlobalIDs[IDIdx]; + if (Info.M->Kind == MK_Module) + resolvePendingMacro(II, Info); + } + } + PendingMacroIDs.clear(); + + // Wire up the DeclContexts for Decls that we delayed setting until + // recursive loading is completed. + while (!PendingDeclContextInfos.empty()) { + PendingDeclContextInfo Info = PendingDeclContextInfos.front(); + PendingDeclContextInfos.pop_front(); + DeclContext *SemaDC = cast<DeclContext>(GetDecl(Info.SemaDC)); + DeclContext *LexicalDC = cast<DeclContext>(GetDecl(Info.LexicalDC)); + Info.D->setDeclContextsImpl(SemaDC, LexicalDC, getContext()); + } + + // For each declaration from a merged context, check that the canonical + // definition of that context also contains a declaration of the same + // entity. + while (!PendingOdrMergeChecks.empty()) { + NamedDecl *D = PendingOdrMergeChecks.pop_back_val(); + + // FIXME: Skip over implicit declarations for now. This matters for things + // like implicitly-declared special member functions. This isn't entirely + // correct; we can end up with multiple unmerged declarations of the same + // implicit entity. + if (D->isImplicit()) + continue; + + DeclContext *CanonDef = D->getDeclContext(); + DeclContext::lookup_result R = CanonDef->lookup(D->getDeclName()); + + bool Found = false; + const Decl *DCanon = D->getCanonicalDecl(); + + llvm::SmallVector<const NamedDecl*, 4> Candidates; + for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); + !Found && I != E; ++I) { + for (Decl::redecl_iterator RI = (*I)->redecls_begin(), + RE = (*I)->redecls_end(); + RI != RE; ++RI) { + if ((*RI)->getLexicalDeclContext() == CanonDef) { + // This declaration is present in the canonical definition. If it's + // in the same redecl chain, it's the one we're looking for. + if ((*RI)->getCanonicalDecl() == DCanon) + Found = true; + else + Candidates.push_back(cast<NamedDecl>(*RI)); + break; + } + } + } + + if (!Found) { + D->setInvalidDecl(); + + Module *CanonDefModule = cast<Decl>(CanonDef)->getOwningModule(); + Diag(D->getLocation(), diag::err_module_odr_violation_missing_decl) + << D << D->getOwningModule()->getFullModuleName() + << CanonDef << !CanonDefModule + << (CanonDefModule ? CanonDefModule->getFullModuleName() : ""); + + if (Candidates.empty()) + Diag(cast<Decl>(CanonDef)->getLocation(), + diag::note_module_odr_violation_no_possible_decls) << D; + else { + for (unsigned I = 0, N = Candidates.size(); I != N; ++I) + Diag(Candidates[I]->getLocation(), + diag::note_module_odr_violation_possible_decl) + << Candidates[I]; + } + } + } + } + + // If we deserialized any C++ or Objective-C class definitions, any + // Objective-C protocol definitions, or any redeclarable templates, make sure + // that all redeclarations point to the definitions. Note that this can only + // happen now, after the redeclaration chains have been fully wired. + for (llvm::SmallPtrSet<Decl *, 4>::iterator D = PendingDefinitions.begin(), + DEnd = PendingDefinitions.end(); + D != DEnd; ++D) { + if (TagDecl *TD = dyn_cast<TagDecl>(*D)) { + if (const TagType *TagT = dyn_cast<TagType>(TD->TypeForDecl)) { + // Make sure that the TagType points at the definition. + const_cast<TagType*>(TagT)->decl = TD; + } + + if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(*D)) { + for (CXXRecordDecl::redecl_iterator R = RD->redecls_begin(), + REnd = RD->redecls_end(); + R != REnd; ++R) + cast<CXXRecordDecl>(*R)->DefinitionData = RD->DefinitionData; + + } + + continue; + } + + if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(*D)) { + // Make sure that the ObjCInterfaceType points at the definition. + const_cast<ObjCInterfaceType *>(cast<ObjCInterfaceType>(ID->TypeForDecl)) + ->Decl = ID; + + for (ObjCInterfaceDecl::redecl_iterator R = ID->redecls_begin(), + REnd = ID->redecls_end(); + R != REnd; ++R) + R->Data = ID->Data; + + continue; + } + + if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(*D)) { + for (ObjCProtocolDecl::redecl_iterator R = PD->redecls_begin(), + REnd = PD->redecls_end(); + R != REnd; ++R) + R->Data = PD->Data; + + continue; + } + + RedeclarableTemplateDecl *RTD + = cast<RedeclarableTemplateDecl>(*D)->getCanonicalDecl(); + for (RedeclarableTemplateDecl::redecl_iterator R = RTD->redecls_begin(), + REnd = RTD->redecls_end(); + R != REnd; ++R) + R->Common = RTD->Common; + } + PendingDefinitions.clear(); + + // Load the bodies of any functions or methods we've encountered. We do + // this now (delayed) so that we can be sure that the declaration chains + // have been fully wired up. + for (PendingBodiesMap::iterator PB = PendingBodies.begin(), + PBEnd = PendingBodies.end(); + PB != PBEnd; ++PB) { + if (FunctionDecl *FD = dyn_cast<FunctionDecl>(PB->first)) { + // FIXME: Check for =delete/=default? + // FIXME: Complain about ODR violations here? + if (!getContext().getLangOpts().Modules || !FD->hasBody()) + FD->setLazyBody(PB->second); + continue; + } + + ObjCMethodDecl *MD = cast<ObjCMethodDecl>(PB->first); + if (!getContext().getLangOpts().Modules || !MD->hasBody()) + MD->setLazyBody(PB->second); + } + PendingBodies.clear(); +} + +void ASTReader::FinishedDeserializing() { + assert(NumCurrentElementsDeserializing && + "FinishedDeserializing not paired with StartedDeserializing"); + if (NumCurrentElementsDeserializing == 1) { + // We decrease NumCurrentElementsDeserializing only after pending actions + // are finished, to avoid recursively re-calling finishPendingActions(). + finishPendingActions(); + } + --NumCurrentElementsDeserializing; + + if (NumCurrentElementsDeserializing == 0 && + Consumer && !PassingDeclsToConsumer) { + // Guard variable to avoid recursively redoing the process of passing + // decls to consumer. + SaveAndRestore<bool> GuardPassingDeclsToConsumer(PassingDeclsToConsumer, + true); + + while (!InterestingDecls.empty()) { + // We are not in recursive loading, so it's safe to pass the "interesting" + // decls to the consumer. + Decl *D = InterestingDecls.front(); + InterestingDecls.pop_front(); + PassInterestingDeclToConsumer(D); + } + } +} + +void ASTReader::pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name) { + D = D->getMostRecentDecl(); + + if (SemaObj->IdResolver.tryAddTopLevelDecl(D, Name) && SemaObj->TUScope) { + SemaObj->TUScope->AddDecl(D); + } else if (SemaObj->TUScope) { + // Adding the decl to IdResolver may have failed because it was already in + // (even though it was not added in scope). If it is already in, make sure + // it gets in the scope as well. + if (std::find(SemaObj->IdResolver.begin(Name), + SemaObj->IdResolver.end(), D) != SemaObj->IdResolver.end()) + SemaObj->TUScope->AddDecl(D); + } +} + +ASTReader::ASTReader(Preprocessor &PP, ASTContext &Context, + StringRef isysroot, bool DisableValidation, + bool AllowASTWithCompilerErrors, bool UseGlobalIndex) + : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), + SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), + Diags(PP.getDiagnostics()), SemaObj(0), PP(PP), Context(Context), + Consumer(0), ModuleMgr(PP.getFileManager()), + isysroot(isysroot), DisableValidation(DisableValidation), + AllowASTWithCompilerErrors(AllowASTWithCompilerErrors), + UseGlobalIndex(UseGlobalIndex), TriedLoadingGlobalIndex(false), + CurrentGeneration(0), CurrSwitchCaseStmts(&SwitchCaseStmts), + NumSLocEntriesRead(0), TotalNumSLocEntries(0), + NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), + TotalNumMacros(0), NumIdentifierLookups(0), NumIdentifierLookupHits(0), + NumSelectorsRead(0), NumMethodPoolEntriesRead(0), + NumMethodPoolLookups(0), NumMethodPoolHits(0), + NumMethodPoolTableLookups(0), NumMethodPoolTableHits(0), + TotalNumMethodPoolEntries(0), + NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), + NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), + TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0), + PassingDeclsToConsumer(false), + NumCXXBaseSpecifiersLoaded(0), ReadingKind(Read_None) +{ + SourceMgr.setExternalSLocEntrySource(this); +} + +ASTReader::~ASTReader() { + for (DeclContextVisibleUpdatesPending::iterator + I = PendingVisibleUpdates.begin(), + E = PendingVisibleUpdates.end(); + I != E; ++I) { + for (DeclContextVisibleUpdates::iterator J = I->second.begin(), + F = I->second.end(); + J != F; ++J) + delete J->first; + } +} |
