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298 lines
12 KiB
298 lines
12 KiB
//===- ChainedIncludesSource.cpp - Chained PCHs in Memory -------*- C++ -*-===// |
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// |
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// The LLVM Compiler Infrastructure |
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// |
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// This file is distributed under the University of Illinois Open Source |
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// License. See LICENSE.TXT for details. |
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// |
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//===----------------------------------------------------------------------===// |
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// |
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// This file defines the ChainedIncludesSource class, which converts headers |
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// to chained PCHs in memory, mainly used for testing. |
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// |
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//===----------------------------------------------------------------------===// |
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#include "clang/Basic/TargetInfo.h" |
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#include "clang/Frontend/ASTUnit.h" |
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#include "clang/Frontend/CompilerInstance.h" |
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#include "clang/Frontend/TextDiagnosticPrinter.h" |
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#include "clang/Lex/Preprocessor.h" |
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#include "clang/Parse/ParseAST.h" |
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#include "clang/Serialization/ASTReader.h" |
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#include "clang/Serialization/ASTWriter.h" |
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#include "llvm/Support/MemoryBuffer.h" |
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using namespace clang; |
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namespace { |
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class ChainedIncludesSource : public ExternalSemaSource { |
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public: |
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~ChainedIncludesSource() override; |
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ExternalSemaSource &getFinalReader() const { return *FinalReader; } |
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std::vector<CompilerInstance *> CIs; |
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IntrusiveRefCntPtr<ExternalSemaSource> FinalReader; |
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protected: |
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//===----------------------------------------------------------------------===// |
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// ExternalASTSource interface. |
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//===----------------------------------------------------------------------===// |
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Decl *GetExternalDecl(uint32_t ID) override; |
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Selector GetExternalSelector(uint32_t ID) override; |
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uint32_t GetNumExternalSelectors() override; |
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Stmt *GetExternalDeclStmt(uint64_t Offset) override; |
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CXXCtorInitializer **GetExternalCXXCtorInitializers(uint64_t Offset) override; |
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CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset) override; |
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bool FindExternalVisibleDeclsByName(const DeclContext *DC, |
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DeclarationName Name) override; |
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void |
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FindExternalLexicalDecls(const DeclContext *DC, |
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llvm::function_ref<bool(Decl::Kind)> IsKindWeWant, |
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SmallVectorImpl<Decl *> &Result) override; |
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void CompleteType(TagDecl *Tag) override; |
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void CompleteType(ObjCInterfaceDecl *Class) override; |
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void StartedDeserializing() override; |
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void FinishedDeserializing() override; |
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void StartTranslationUnit(ASTConsumer *Consumer) override; |
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void PrintStats() override; |
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/// Return the amount of memory used by memory buffers, breaking down |
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/// by heap-backed versus mmap'ed memory. |
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void getMemoryBufferSizes(MemoryBufferSizes &sizes) const override; |
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//===----------------------------------------------------------------------===// |
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// ExternalSemaSource interface. |
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//===----------------------------------------------------------------------===// |
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void InitializeSema(Sema &S) override; |
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void ForgetSema() override; |
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void ReadMethodPool(Selector Sel) override; |
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bool LookupUnqualified(LookupResult &R, Scope *S) override; |
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}; |
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} |
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static ASTReader * |
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createASTReader(CompilerInstance &CI, StringRef pchFile, |
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SmallVectorImpl<std::unique_ptr<llvm::MemoryBuffer>> &MemBufs, |
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SmallVectorImpl<std::string> &bufNames, |
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ASTDeserializationListener *deserialListener = nullptr) { |
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Preprocessor &PP = CI.getPreprocessor(); |
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std::unique_ptr<ASTReader> Reader; |
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Reader.reset(new ASTReader(PP, CI.getASTContext(), |
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CI.getPCHContainerReader(), |
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/*Extensions=*/{ }, |
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/*isysroot=*/"", /*DisableValidation=*/true)); |
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for (unsigned ti = 0; ti < bufNames.size(); ++ti) { |
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StringRef sr(bufNames[ti]); |
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Reader->addInMemoryBuffer(sr, std::move(MemBufs[ti])); |
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} |
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Reader->setDeserializationListener(deserialListener); |
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switch (Reader->ReadAST(pchFile, serialization::MK_PCH, SourceLocation(), |
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ASTReader::ARR_None)) { |
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case ASTReader::Success: |
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// Set the predefines buffer as suggested by the PCH reader. |
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PP.setPredefines(Reader->getSuggestedPredefines()); |
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return Reader.release(); |
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case ASTReader::Failure: |
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case ASTReader::Missing: |
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case ASTReader::OutOfDate: |
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case ASTReader::VersionMismatch: |
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case ASTReader::ConfigurationMismatch: |
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case ASTReader::HadErrors: |
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break; |
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} |
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return nullptr; |
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} |
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ChainedIncludesSource::~ChainedIncludesSource() { |
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for (unsigned i = 0, e = CIs.size(); i != e; ++i) |
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delete CIs[i]; |
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} |
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IntrusiveRefCntPtr<ExternalSemaSource> clang::createChainedIncludesSource( |
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CompilerInstance &CI, IntrusiveRefCntPtr<ExternalSemaSource> &Reader) { |
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std::vector<std::string> &includes = CI.getPreprocessorOpts().ChainedIncludes; |
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assert(!includes.empty() && "No '-chain-include' in options!"); |
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IntrusiveRefCntPtr<ChainedIncludesSource> source(new ChainedIncludesSource()); |
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InputKind IK = CI.getFrontendOpts().Inputs[0].getKind(); |
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SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 4> SerialBufs; |
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SmallVector<std::string, 4> serialBufNames; |
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for (unsigned i = 0, e = includes.size(); i != e; ++i) { |
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bool firstInclude = (i == 0); |
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std::unique_ptr<CompilerInvocation> CInvok; |
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CInvok.reset(new CompilerInvocation(CI.getInvocation())); |
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CInvok->getPreprocessorOpts().ChainedIncludes.clear(); |
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CInvok->getPreprocessorOpts().ImplicitPCHInclude.clear(); |
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CInvok->getPreprocessorOpts().ImplicitPTHInclude.clear(); |
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CInvok->getPreprocessorOpts().DisablePCHValidation = true; |
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CInvok->getPreprocessorOpts().Includes.clear(); |
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CInvok->getPreprocessorOpts().MacroIncludes.clear(); |
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CInvok->getPreprocessorOpts().Macros.clear(); |
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CInvok->getFrontendOpts().Inputs.clear(); |
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FrontendInputFile InputFile(includes[i], IK); |
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CInvok->getFrontendOpts().Inputs.push_back(InputFile); |
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TextDiagnosticPrinter *DiagClient = |
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new TextDiagnosticPrinter(llvm::errs(), new DiagnosticOptions()); |
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IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); |
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IntrusiveRefCntPtr<DiagnosticsEngine> Diags( |
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new DiagnosticsEngine(DiagID, &CI.getDiagnosticOpts(), DiagClient)); |
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std::unique_ptr<CompilerInstance> Clang( |
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new CompilerInstance(CI.getPCHContainerOperations())); |
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Clang->setInvocation(CInvok.release()); |
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Clang->setDiagnostics(Diags.get()); |
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Clang->setTarget(TargetInfo::CreateTargetInfo( |
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Clang->getDiagnostics(), Clang->getInvocation().TargetOpts)); |
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Clang->createFileManager(); |
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Clang->createSourceManager(Clang->getFileManager()); |
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Clang->createPreprocessor(TU_Prefix); |
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Clang->getDiagnosticClient().BeginSourceFile(Clang->getLangOpts(), |
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&Clang->getPreprocessor()); |
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Clang->createASTContext(); |
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auto Buffer = std::make_shared<PCHBuffer>(); |
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ArrayRef<llvm::IntrusiveRefCntPtr<ModuleFileExtension>> Extensions; |
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auto consumer = llvm::make_unique<PCHGenerator>( |
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Clang->getPreprocessor(), "-", nullptr, /*isysroot=*/"", Buffer, |
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Extensions, /*AllowASTWithErrors=*/true); |
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Clang->getASTContext().setASTMutationListener( |
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consumer->GetASTMutationListener()); |
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Clang->setASTConsumer(std::move(consumer)); |
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Clang->createSema(TU_Prefix, nullptr); |
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if (firstInclude) { |
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Preprocessor &PP = Clang->getPreprocessor(); |
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PP.getBuiltinInfo().initializeBuiltins(PP.getIdentifierTable(), |
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PP.getLangOpts()); |
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} else { |
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assert(!SerialBufs.empty()); |
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SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 4> Bufs; |
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// TODO: Pass through the existing MemoryBuffer instances instead of |
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// allocating new ones. |
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for (auto &SB : SerialBufs) |
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Bufs.push_back(llvm::MemoryBuffer::getMemBuffer(SB->getBuffer())); |
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std::string pchName = includes[i-1]; |
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llvm::raw_string_ostream os(pchName); |
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os << ".pch" << i-1; |
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serialBufNames.push_back(os.str()); |
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IntrusiveRefCntPtr<ASTReader> Reader; |
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Reader = createASTReader( |
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*Clang, pchName, Bufs, serialBufNames, |
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Clang->getASTConsumer().GetASTDeserializationListener()); |
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if (!Reader) |
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return nullptr; |
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Clang->setModuleManager(Reader); |
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Clang->getASTContext().setExternalSource(Reader); |
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} |
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if (!Clang->InitializeSourceManager(InputFile)) |
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return nullptr; |
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ParseAST(Clang->getSema()); |
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Clang->getDiagnosticClient().EndSourceFile(); |
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assert(Buffer->IsComplete && "serialization did not complete"); |
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auto &serialAST = Buffer->Data; |
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SerialBufs.push_back(llvm::MemoryBuffer::getMemBufferCopy( |
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StringRef(serialAST.data(), serialAST.size()))); |
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serialAST.clear(); |
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source->CIs.push_back(Clang.release()); |
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} |
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assert(!SerialBufs.empty()); |
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std::string pchName = includes.back() + ".pch-final"; |
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serialBufNames.push_back(pchName); |
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Reader = createASTReader(CI, pchName, SerialBufs, serialBufNames); |
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if (!Reader) |
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return nullptr; |
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source->FinalReader = Reader; |
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return source; |
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} |
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//===----------------------------------------------------------------------===// |
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// ExternalASTSource interface. |
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//===----------------------------------------------------------------------===// |
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Decl *ChainedIncludesSource::GetExternalDecl(uint32_t ID) { |
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return getFinalReader().GetExternalDecl(ID); |
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} |
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Selector ChainedIncludesSource::GetExternalSelector(uint32_t ID) { |
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return getFinalReader().GetExternalSelector(ID); |
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} |
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uint32_t ChainedIncludesSource::GetNumExternalSelectors() { |
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return getFinalReader().GetNumExternalSelectors(); |
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} |
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Stmt *ChainedIncludesSource::GetExternalDeclStmt(uint64_t Offset) { |
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return getFinalReader().GetExternalDeclStmt(Offset); |
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} |
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CXXBaseSpecifier * |
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ChainedIncludesSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) { |
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return getFinalReader().GetExternalCXXBaseSpecifiers(Offset); |
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} |
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CXXCtorInitializer ** |
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ChainedIncludesSource::GetExternalCXXCtorInitializers(uint64_t Offset) { |
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return getFinalReader().GetExternalCXXCtorInitializers(Offset); |
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} |
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bool |
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ChainedIncludesSource::FindExternalVisibleDeclsByName(const DeclContext *DC, |
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DeclarationName Name) { |
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return getFinalReader().FindExternalVisibleDeclsByName(DC, Name); |
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} |
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void ChainedIncludesSource::FindExternalLexicalDecls( |
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const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant, |
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SmallVectorImpl<Decl *> &Result) { |
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return getFinalReader().FindExternalLexicalDecls(DC, IsKindWeWant, Result); |
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} |
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void ChainedIncludesSource::CompleteType(TagDecl *Tag) { |
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return getFinalReader().CompleteType(Tag); |
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} |
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void ChainedIncludesSource::CompleteType(ObjCInterfaceDecl *Class) { |
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return getFinalReader().CompleteType(Class); |
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} |
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void ChainedIncludesSource::StartedDeserializing() { |
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return getFinalReader().StartedDeserializing(); |
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} |
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void ChainedIncludesSource::FinishedDeserializing() { |
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return getFinalReader().FinishedDeserializing(); |
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} |
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void ChainedIncludesSource::StartTranslationUnit(ASTConsumer *Consumer) { |
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return getFinalReader().StartTranslationUnit(Consumer); |
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} |
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void ChainedIncludesSource::PrintStats() { |
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return getFinalReader().PrintStats(); |
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} |
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void ChainedIncludesSource::getMemoryBufferSizes(MemoryBufferSizes &sizes)const{ |
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for (unsigned i = 0, e = CIs.size(); i != e; ++i) { |
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if (const ExternalASTSource *eSrc = |
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CIs[i]->getASTContext().getExternalSource()) { |
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eSrc->getMemoryBufferSizes(sizes); |
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} |
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} |
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getFinalReader().getMemoryBufferSizes(sizes); |
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} |
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void ChainedIncludesSource::InitializeSema(Sema &S) { |
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return getFinalReader().InitializeSema(S); |
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} |
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void ChainedIncludesSource::ForgetSema() { |
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return getFinalReader().ForgetSema(); |
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} |
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void ChainedIncludesSource::ReadMethodPool(Selector Sel) { |
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getFinalReader().ReadMethodPool(Sel); |
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} |
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bool ChainedIncludesSource::LookupUnqualified(LookupResult &R, Scope *S) { |
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return getFinalReader().LookupUnqualified(R, S); |
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} |
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