forked from OSchip/llvm-project
299 lines
12 KiB
C++
299 lines
12 KiB
C++
//===- 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);
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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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