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Diffstat (limited to 'clang/lib/Frontend/FrontendAction.cpp')
| -rw-r--r-- | clang/lib/Frontend/FrontendAction.cpp | 468 |
1 files changed, 468 insertions, 0 deletions
diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp new file mode 100644 index 0000000..da4bdfa --- /dev/null +++ b/clang/lib/Frontend/FrontendAction.cpp @@ -0,0 +1,468 @@ +//===--- FrontendAction.cpp -----------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "clang/Frontend/FrontendAction.h" +#include "clang/AST/ASTConsumer.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/DeclGroup.h" +#include "clang/Lex/HeaderSearch.h" +#include "clang/Lex/Preprocessor.h" +#include "clang/Frontend/ASTUnit.h" +#include "clang/Frontend/ChainedIncludesSource.h" +#include "clang/Frontend/CompilerInstance.h" +#include "clang/Frontend/FrontendDiagnostic.h" +#include "clang/Frontend/FrontendPluginRegistry.h" +#include "clang/Frontend/LayoutOverrideSource.h" +#include "clang/Frontend/MultiplexConsumer.h" +#include "clang/Parse/ParseAST.h" +#include "clang/Serialization/ASTDeserializationListener.h" +#include "clang/Serialization/ASTReader.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Timer.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" +using namespace clang; + +namespace { + +class DelegatingDeserializationListener : public ASTDeserializationListener { + ASTDeserializationListener *Previous; + +public: + explicit DelegatingDeserializationListener( + ASTDeserializationListener *Previous) + : Previous(Previous) { } + + virtual void ReaderInitialized(ASTReader *Reader) { + if (Previous) + Previous->ReaderInitialized(Reader); + } + virtual void IdentifierRead(serialization::IdentID ID, + IdentifierInfo *II) { + if (Previous) + Previous->IdentifierRead(ID, II); + } + virtual void TypeRead(serialization::TypeIdx Idx, QualType T) { + if (Previous) + Previous->TypeRead(Idx, T); + } + virtual void DeclRead(serialization::DeclID ID, const Decl *D) { + if (Previous) + Previous->DeclRead(ID, D); + } + virtual void SelectorRead(serialization::SelectorID ID, Selector Sel) { + if (Previous) + Previous->SelectorRead(ID, Sel); + } + virtual void MacroDefinitionRead(serialization::PreprocessedEntityID PPID, + MacroDefinition *MD) { + if (Previous) + Previous->MacroDefinitionRead(PPID, MD); + } +}; + +/// \brief Dumps deserialized declarations. +class DeserializedDeclsDumper : public DelegatingDeserializationListener { +public: + explicit DeserializedDeclsDumper(ASTDeserializationListener *Previous) + : DelegatingDeserializationListener(Previous) { } + + virtual void DeclRead(serialization::DeclID ID, const Decl *D) { + llvm::outs() << "PCH DECL: " << D->getDeclKindName(); + if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) + llvm::outs() << " - " << *ND; + llvm::outs() << "\n"; + + DelegatingDeserializationListener::DeclRead(ID, D); + } +}; + + /// \brief Checks deserialized declarations and emits error if a name + /// matches one given in command-line using -error-on-deserialized-decl. + class DeserializedDeclsChecker : public DelegatingDeserializationListener { + ASTContext &Ctx; + std::set<std::string> NamesToCheck; + + public: + DeserializedDeclsChecker(ASTContext &Ctx, + const std::set<std::string> &NamesToCheck, + ASTDeserializationListener *Previous) + : DelegatingDeserializationListener(Previous), + Ctx(Ctx), NamesToCheck(NamesToCheck) { } + + virtual void DeclRead(serialization::DeclID ID, const Decl *D) { + if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) + if (NamesToCheck.find(ND->getNameAsString()) != NamesToCheck.end()) { + unsigned DiagID + = Ctx.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error, + "%0 was deserialized"); + Ctx.getDiagnostics().Report(Ctx.getFullLoc(D->getLocation()), DiagID) + << ND->getNameAsString(); + } + + DelegatingDeserializationListener::DeclRead(ID, D); + } +}; + +} // end anonymous namespace + +FrontendAction::FrontendAction() : Instance(0) {} + +FrontendAction::~FrontendAction() {} + +void FrontendAction::setCurrentInput(const FrontendInputFile &CurrentInput, + ASTUnit *AST) { + this->CurrentInput = CurrentInput; + CurrentASTUnit.reset(AST); +} + +ASTConsumer* FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI, + StringRef InFile) { + ASTConsumer* Consumer = CreateASTConsumer(CI, InFile); + if (!Consumer) + return 0; + + if (CI.getFrontendOpts().AddPluginActions.size() == 0) + return Consumer; + + // Make sure the non-plugin consumer is first, so that plugins can't + // modifiy the AST. + std::vector<ASTConsumer*> Consumers(1, Consumer); + + for (size_t i = 0, e = CI.getFrontendOpts().AddPluginActions.size(); + i != e; ++i) { + // This is O(|plugins| * |add_plugins|), but since both numbers are + // way below 50 in practice, that's ok. + for (FrontendPluginRegistry::iterator + it = FrontendPluginRegistry::begin(), + ie = FrontendPluginRegistry::end(); + it != ie; ++it) { + if (it->getName() == CI.getFrontendOpts().AddPluginActions[i]) { + OwningPtr<PluginASTAction> P(it->instantiate()); + FrontendAction* c = P.get(); + if (P->ParseArgs(CI, CI.getFrontendOpts().AddPluginArgs[i])) + Consumers.push_back(c->CreateASTConsumer(CI, InFile)); + } + } + } + + return new MultiplexConsumer(Consumers); +} + +bool FrontendAction::BeginSourceFile(CompilerInstance &CI, + const FrontendInputFile &Input) { + assert(!Instance && "Already processing a source file!"); + assert(!Input.File.empty() && "Unexpected empty filename!"); + setCurrentInput(Input); + setCompilerInstance(&CI); + + if (!BeginInvocation(CI)) + goto failure; + + // AST files follow a very different path, since they share objects via the + // AST unit. + if (Input.Kind == IK_AST) { + assert(!usesPreprocessorOnly() && + "Attempt to pass AST file to preprocessor only action!"); + assert(hasASTFileSupport() && + "This action does not have AST file support!"); + + IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics()); + std::string Error; + ASTUnit *AST = ASTUnit::LoadFromASTFile(Input.File, Diags, + CI.getFileSystemOpts()); + if (!AST) + goto failure; + + setCurrentInput(Input, AST); + + // Set the shared objects, these are reset when we finish processing the + // file, otherwise the CompilerInstance will happily destroy them. + CI.setFileManager(&AST->getFileManager()); + CI.setSourceManager(&AST->getSourceManager()); + CI.setPreprocessor(&AST->getPreprocessor()); + CI.setASTContext(&AST->getASTContext()); + + // Initialize the action. + if (!BeginSourceFileAction(CI, Input.File)) + goto failure; + + /// Create the AST consumer. + CI.setASTConsumer(CreateWrappedASTConsumer(CI, Input.File)); + if (!CI.hasASTConsumer()) + goto failure; + + return true; + } + + // Set up the file and source managers, if needed. + if (!CI.hasFileManager()) + CI.createFileManager(); + if (!CI.hasSourceManager()) + CI.createSourceManager(CI.getFileManager()); + + // IR files bypass the rest of initialization. + if (Input.Kind == IK_LLVM_IR) { + assert(hasIRSupport() && + "This action does not have IR file support!"); + + // Inform the diagnostic client we are processing a source file. + CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), 0); + + // Initialize the action. + if (!BeginSourceFileAction(CI, Input.File)) + goto failure; + + return true; + } + + // Set up the preprocessor. + CI.createPreprocessor(); + + // Inform the diagnostic client we are processing a source file. + CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), + &CI.getPreprocessor()); + + // Initialize the action. + if (!BeginSourceFileAction(CI, Input.File)) + goto failure; + + /// Create the AST context and consumer unless this is a preprocessor only + /// action. + if (!usesPreprocessorOnly()) { + CI.createASTContext(); + + OwningPtr<ASTConsumer> Consumer( + CreateWrappedASTConsumer(CI, Input.File)); + if (!Consumer) + goto failure; + + CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener()); + + if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) { + // Convert headers to PCH and chain them. + OwningPtr<ExternalASTSource> source; + source.reset(ChainedIncludesSource::create(CI)); + if (!source) + goto failure; + CI.getASTContext().setExternalSource(source); + + } else if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) { + // Use PCH. + assert(hasPCHSupport() && "This action does not have PCH support!"); + ASTDeserializationListener *DeserialListener = + Consumer->GetASTDeserializationListener(); + if (CI.getPreprocessorOpts().DumpDeserializedPCHDecls) + DeserialListener = new DeserializedDeclsDumper(DeserialListener); + if (!CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn.empty()) + DeserialListener = new DeserializedDeclsChecker(CI.getASTContext(), + CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn, + DeserialListener); + CI.createPCHExternalASTSource( + CI.getPreprocessorOpts().ImplicitPCHInclude, + CI.getPreprocessorOpts().DisablePCHValidation, + CI.getPreprocessorOpts().DisableStatCache, + CI.getPreprocessorOpts().AllowPCHWithCompilerErrors, + DeserialListener); + if (!CI.getASTContext().getExternalSource()) + goto failure; + } + + CI.setASTConsumer(Consumer.take()); + if (!CI.hasASTConsumer()) + goto failure; + } + + // Initialize built-in info as long as we aren't using an external AST + // source. + if (!CI.hasASTContext() || !CI.getASTContext().getExternalSource()) { + Preprocessor &PP = CI.getPreprocessor(); + PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(), + PP.getLangOpts()); + } + + // If there is a layout overrides file, attach an external AST source that + // provides the layouts from that file. + if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() && + CI.hasASTContext() && !CI.getASTContext().getExternalSource()) { + OwningPtr<ExternalASTSource> + Override(new LayoutOverrideSource( + CI.getFrontendOpts().OverrideRecordLayoutsFile)); + CI.getASTContext().setExternalSource(Override); + } + + return true; + + // If we failed, reset state since the client will not end up calling the + // matching EndSourceFile(). + failure: + if (isCurrentFileAST()) { + CI.setASTContext(0); + CI.setPreprocessor(0); + CI.setSourceManager(0); + CI.setFileManager(0); + } + + CI.getDiagnosticClient().EndSourceFile(); + setCurrentInput(FrontendInputFile()); + setCompilerInstance(0); + return false; +} + +void FrontendAction::Execute() { + CompilerInstance &CI = getCompilerInstance(); + + // Initialize the main file entry. This needs to be delayed until after PCH + // has loaded. + if (!isCurrentFileAST()) { + if (!CI.InitializeSourceManager(getCurrentFile(), + getCurrentInput().IsSystem + ? SrcMgr::C_System + : SrcMgr::C_User)) + return; + } + + if (CI.hasFrontendTimer()) { + llvm::TimeRegion Timer(CI.getFrontendTimer()); + ExecuteAction(); + } + else ExecuteAction(); +} + +void FrontendAction::EndSourceFile() { + CompilerInstance &CI = getCompilerInstance(); + + // Inform the diagnostic client we are done with this source file. + CI.getDiagnosticClient().EndSourceFile(); + + // Finalize the action. + EndSourceFileAction(); + + // Release the consumer and the AST, in that order since the consumer may + // perform actions in its destructor which require the context. + // + // FIXME: There is more per-file stuff we could just drop here? + if (CI.getFrontendOpts().DisableFree) { + CI.takeASTConsumer(); + if (!isCurrentFileAST()) { + CI.takeSema(); + CI.resetAndLeakASTContext(); + } + } else { + if (!isCurrentFileAST()) { + CI.setSema(0); + CI.setASTContext(0); + } + CI.setASTConsumer(0); + } + + // Inform the preprocessor we are done. + if (CI.hasPreprocessor()) + CI.getPreprocessor().EndSourceFile(); + + if (CI.getFrontendOpts().ShowStats) { + llvm::errs() << "\nSTATISTICS FOR '" << getCurrentFile() << "':\n"; + CI.getPreprocessor().PrintStats(); + CI.getPreprocessor().getIdentifierTable().PrintStats(); + CI.getPreprocessor().getHeaderSearchInfo().PrintStats(); + CI.getSourceManager().PrintStats(); + llvm::errs() << "\n"; + } + + // Cleanup the output streams, and erase the output files if we encountered + // an error. + CI.clearOutputFiles(/*EraseFiles=*/CI.getDiagnostics().hasErrorOccurred()); + + if (isCurrentFileAST()) { + CI.takeSema(); + CI.resetAndLeakASTContext(); + CI.resetAndLeakPreprocessor(); + CI.resetAndLeakSourceManager(); + CI.resetAndLeakFileManager(); + } + + setCompilerInstance(0); + setCurrentInput(FrontendInputFile()); +} + +//===----------------------------------------------------------------------===// +// Utility Actions +//===----------------------------------------------------------------------===// + +void ASTFrontendAction::ExecuteAction() { + CompilerInstance &CI = getCompilerInstance(); + + // FIXME: Move the truncation aspect of this into Sema, we delayed this till + // here so the source manager would be initialized. + if (hasCodeCompletionSupport() && + !CI.getFrontendOpts().CodeCompletionAt.FileName.empty()) + CI.createCodeCompletionConsumer(); + + // Use a code completion consumer? + CodeCompleteConsumer *CompletionConsumer = 0; + if (CI.hasCodeCompletionConsumer()) + CompletionConsumer = &CI.getCodeCompletionConsumer(); + + if (!CI.hasSema()) + CI.createSema(getTranslationUnitKind(), CompletionConsumer); + + ParseAST(CI.getSema(), CI.getFrontendOpts().ShowStats, + CI.getFrontendOpts().SkipFunctionBodies); +} + +void PluginASTAction::anchor() { } + +ASTConsumer * +PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI, + StringRef InFile) { + llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!"); +} + +ASTConsumer *WrapperFrontendAction::CreateASTConsumer(CompilerInstance &CI, + StringRef InFile) { + return WrappedAction->CreateASTConsumer(CI, InFile); +} +bool WrapperFrontendAction::BeginInvocation(CompilerInstance &CI) { + return WrappedAction->BeginInvocation(CI); +} +bool WrapperFrontendAction::BeginSourceFileAction(CompilerInstance &CI, + StringRef Filename) { + WrappedAction->setCurrentInput(getCurrentInput()); + WrappedAction->setCompilerInstance(&CI); + return WrappedAction->BeginSourceFileAction(CI, Filename); +} +void WrapperFrontendAction::ExecuteAction() { + WrappedAction->ExecuteAction(); +} +void WrapperFrontendAction::EndSourceFileAction() { + WrappedAction->EndSourceFileAction(); +} + +bool WrapperFrontendAction::usesPreprocessorOnly() const { + return WrappedAction->usesPreprocessorOnly(); +} +TranslationUnitKind WrapperFrontendAction::getTranslationUnitKind() { + return WrappedAction->getTranslationUnitKind(); +} +bool WrapperFrontendAction::hasPCHSupport() const { + return WrappedAction->hasPCHSupport(); +} +bool WrapperFrontendAction::hasASTFileSupport() const { + return WrappedAction->hasASTFileSupport(); +} +bool WrapperFrontendAction::hasIRSupport() const { + return WrappedAction->hasIRSupport(); +} +bool WrapperFrontendAction::hasCodeCompletionSupport() const { + return WrappedAction->hasCodeCompletionSupport(); +} + +WrapperFrontendAction::WrapperFrontendAction(FrontendAction *WrappedAction) + : WrappedAction(WrappedAction) {} + |