528 lines
18 KiB
C++
528 lines
18 KiB
C++
//===--- FrontendAction.cpp -----------------------------------------------===//
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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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#include "clang/Frontend/FrontendAction.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclGroup.h"
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#include "clang/Frontend/ASTUnit.h"
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#include "clang/Frontend/ChainedIncludesSource.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "clang/Frontend/FrontendPluginRegistry.h"
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#include "clang/Frontend/LayoutOverrideSource.h"
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#include "clang/Frontend/MultiplexConsumer.h"
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#include "clang/Lex/HeaderSearch.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/ASTDeserializationListener.h"
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#include "clang/Serialization/ASTReader.h"
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#include "clang/Serialization/GlobalModuleIndex.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/system_error.h"
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using namespace clang;
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namespace {
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class DelegatingDeserializationListener : public ASTDeserializationListener {
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ASTDeserializationListener *Previous;
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public:
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explicit DelegatingDeserializationListener(
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ASTDeserializationListener *Previous)
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: Previous(Previous) { }
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virtual void ReaderInitialized(ASTReader *Reader) {
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if (Previous)
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Previous->ReaderInitialized(Reader);
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}
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virtual void IdentifierRead(serialization::IdentID ID,
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IdentifierInfo *II) {
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if (Previous)
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Previous->IdentifierRead(ID, II);
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}
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virtual void TypeRead(serialization::TypeIdx Idx, QualType T) {
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if (Previous)
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Previous->TypeRead(Idx, T);
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}
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virtual void DeclRead(serialization::DeclID ID, const Decl *D) {
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if (Previous)
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Previous->DeclRead(ID, D);
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}
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virtual void SelectorRead(serialization::SelectorID ID, Selector Sel) {
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if (Previous)
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Previous->SelectorRead(ID, Sel);
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}
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virtual void MacroDefinitionRead(serialization::PreprocessedEntityID PPID,
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MacroDefinition *MD) {
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if (Previous)
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Previous->MacroDefinitionRead(PPID, MD);
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}
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};
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/// \brief Dumps deserialized declarations.
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class DeserializedDeclsDumper : public DelegatingDeserializationListener {
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public:
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explicit DeserializedDeclsDumper(ASTDeserializationListener *Previous)
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: DelegatingDeserializationListener(Previous) { }
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virtual void DeclRead(serialization::DeclID ID, const Decl *D) {
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llvm::outs() << "PCH DECL: " << D->getDeclKindName();
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if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
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llvm::outs() << " - " << *ND;
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llvm::outs() << "\n";
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DelegatingDeserializationListener::DeclRead(ID, D);
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}
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};
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/// \brief Checks deserialized declarations and emits error if a name
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/// matches one given in command-line using -error-on-deserialized-decl.
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class DeserializedDeclsChecker : public DelegatingDeserializationListener {
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ASTContext &Ctx;
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std::set<std::string> NamesToCheck;
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public:
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DeserializedDeclsChecker(ASTContext &Ctx,
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const std::set<std::string> &NamesToCheck,
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ASTDeserializationListener *Previous)
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: DelegatingDeserializationListener(Previous),
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Ctx(Ctx), NamesToCheck(NamesToCheck) { }
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virtual void DeclRead(serialization::DeclID ID, const Decl *D) {
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if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
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if (NamesToCheck.find(ND->getNameAsString()) != NamesToCheck.end()) {
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unsigned DiagID
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= Ctx.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error,
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"%0 was deserialized");
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Ctx.getDiagnostics().Report(Ctx.getFullLoc(D->getLocation()), DiagID)
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<< ND->getNameAsString();
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}
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DelegatingDeserializationListener::DeclRead(ID, D);
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}
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};
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} // end anonymous namespace
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FrontendAction::FrontendAction() : Instance(0) {}
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FrontendAction::~FrontendAction() {}
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void FrontendAction::setCurrentInput(const FrontendInputFile &CurrentInput,
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ASTUnit *AST) {
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this->CurrentInput = CurrentInput;
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CurrentASTUnit.reset(AST);
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}
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ASTConsumer* FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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ASTConsumer* Consumer = CreateASTConsumer(CI, InFile);
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if (!Consumer)
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return 0;
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if (CI.getFrontendOpts().AddPluginActions.size() == 0)
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return Consumer;
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// Make sure the non-plugin consumer is first, so that plugins can't
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// modifiy the AST.
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std::vector<ASTConsumer*> Consumers(1, Consumer);
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for (size_t i = 0, e = CI.getFrontendOpts().AddPluginActions.size();
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i != e; ++i) {
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// This is O(|plugins| * |add_plugins|), but since both numbers are
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// way below 50 in practice, that's ok.
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for (FrontendPluginRegistry::iterator
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it = FrontendPluginRegistry::begin(),
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ie = FrontendPluginRegistry::end();
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it != ie; ++it) {
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if (it->getName() == CI.getFrontendOpts().AddPluginActions[i]) {
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OwningPtr<PluginASTAction> P(it->instantiate());
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FrontendAction* c = P.get();
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if (P->ParseArgs(CI, CI.getFrontendOpts().AddPluginArgs[i]))
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Consumers.push_back(c->CreateASTConsumer(CI, InFile));
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}
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}
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}
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return new MultiplexConsumer(Consumers);
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}
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bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
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const FrontendInputFile &Input) {
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assert(!Instance && "Already processing a source file!");
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assert(!Input.isEmpty() && "Unexpected empty filename!");
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setCurrentInput(Input);
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setCompilerInstance(&CI);
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StringRef InputFile = Input.getFile();
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bool HasBegunSourceFile = false;
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if (!BeginInvocation(CI))
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goto failure;
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// AST files follow a very different path, since they share objects via the
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// AST unit.
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if (Input.getKind() == IK_AST) {
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assert(!usesPreprocessorOnly() &&
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"Attempt to pass AST file to preprocessor only action!");
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assert(hasASTFileSupport() &&
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"This action does not have AST file support!");
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IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
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std::string Error;
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ASTUnit *AST = ASTUnit::LoadFromASTFile(InputFile, Diags,
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CI.getFileSystemOpts());
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if (!AST)
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goto failure;
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setCurrentInput(Input, AST);
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// Inform the diagnostic client we are processing a source file.
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CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), 0);
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HasBegunSourceFile = true;
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// Set the shared objects, these are reset when we finish processing the
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// file, otherwise the CompilerInstance will happily destroy them.
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CI.setFileManager(&AST->getFileManager());
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CI.setSourceManager(&AST->getSourceManager());
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CI.setPreprocessor(&AST->getPreprocessor());
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CI.setASTContext(&AST->getASTContext());
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// Initialize the action.
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if (!BeginSourceFileAction(CI, InputFile))
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goto failure;
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// Create the AST consumer.
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CI.setASTConsumer(CreateWrappedASTConsumer(CI, InputFile));
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if (!CI.hasASTConsumer())
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goto failure;
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return true;
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}
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// Set up the file and source managers, if needed.
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if (!CI.hasFileManager())
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CI.createFileManager();
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if (!CI.hasSourceManager())
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CI.createSourceManager(CI.getFileManager());
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// IR files bypass the rest of initialization.
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if (Input.getKind() == IK_LLVM_IR) {
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assert(hasIRSupport() &&
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"This action does not have IR file support!");
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// Inform the diagnostic client we are processing a source file.
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CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), 0);
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HasBegunSourceFile = true;
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// Initialize the action.
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if (!BeginSourceFileAction(CI, InputFile))
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goto failure;
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return true;
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}
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// If the implicit PCH include is actually a directory, rather than
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// a single file, search for a suitable PCH file in that directory.
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if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
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FileManager &FileMgr = CI.getFileManager();
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PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
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StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
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if (const DirectoryEntry *PCHDir = FileMgr.getDirectory(PCHInclude)) {
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llvm::error_code EC;
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SmallString<128> DirNative;
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llvm::sys::path::native(PCHDir->getName(), DirNative);
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bool Found = false;
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for (llvm::sys::fs::directory_iterator Dir(DirNative.str(), EC), DirEnd;
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Dir != DirEnd && !EC; Dir.increment(EC)) {
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// Check whether this is an acceptable AST file.
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if (ASTReader::isAcceptableASTFile(Dir->path(), FileMgr,
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CI.getLangOpts(),
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CI.getTargetOpts(),
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CI.getPreprocessorOpts())) {
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PPOpts.ImplicitPCHInclude = Dir->path();
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Found = true;
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break;
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}
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}
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if (!Found) {
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CI.getDiagnostics().Report(diag::err_fe_no_pch_in_dir) << PCHInclude;
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return true;
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}
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}
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}
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// Set up the preprocessor.
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CI.createPreprocessor();
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// Inform the diagnostic client we are processing a source file.
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CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(),
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&CI.getPreprocessor());
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HasBegunSourceFile = true;
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// Initialize the action.
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if (!BeginSourceFileAction(CI, InputFile))
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goto failure;
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// Create the AST context and consumer unless this is a preprocessor only
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// action.
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if (!usesPreprocessorOnly()) {
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CI.createASTContext();
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OwningPtr<ASTConsumer> Consumer(
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CreateWrappedASTConsumer(CI, InputFile));
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if (!Consumer)
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goto failure;
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CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
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if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
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// Convert headers to PCH and chain them.
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OwningPtr<ExternalASTSource> source;
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source.reset(ChainedIncludesSource::create(CI));
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if (!source)
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goto failure;
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CI.setModuleManager(static_cast<ASTReader*>(
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&static_cast<ChainedIncludesSource*>(source.get())->getFinalReader()));
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CI.getASTContext().setExternalSource(source);
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} else if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
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// Use PCH.
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assert(hasPCHSupport() && "This action does not have PCH support!");
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ASTDeserializationListener *DeserialListener =
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Consumer->GetASTDeserializationListener();
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if (CI.getPreprocessorOpts().DumpDeserializedPCHDecls)
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DeserialListener = new DeserializedDeclsDumper(DeserialListener);
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if (!CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn.empty())
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DeserialListener = new DeserializedDeclsChecker(CI.getASTContext(),
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CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn,
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DeserialListener);
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CI.createPCHExternalASTSource(
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CI.getPreprocessorOpts().ImplicitPCHInclude,
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CI.getPreprocessorOpts().DisablePCHValidation,
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CI.getPreprocessorOpts().AllowPCHWithCompilerErrors,
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DeserialListener);
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if (!CI.getASTContext().getExternalSource())
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goto failure;
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}
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CI.setASTConsumer(Consumer.take());
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if (!CI.hasASTConsumer())
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goto failure;
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}
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// Initialize built-in info as long as we aren't using an external AST
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// source.
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if (!CI.hasASTContext() || !CI.getASTContext().getExternalSource()) {
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Preprocessor &PP = CI.getPreprocessor();
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PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
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PP.getLangOpts());
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}
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// If there is a layout overrides file, attach an external AST source that
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// provides the layouts from that file.
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if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() &&
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CI.hasASTContext() && !CI.getASTContext().getExternalSource()) {
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OwningPtr<ExternalASTSource>
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Override(new LayoutOverrideSource(
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CI.getFrontendOpts().OverrideRecordLayoutsFile));
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CI.getASTContext().setExternalSource(Override);
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}
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return true;
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// If we failed, reset state since the client will not end up calling the
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// matching EndSourceFile().
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failure:
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if (isCurrentFileAST()) {
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CI.setASTContext(0);
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CI.setPreprocessor(0);
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CI.setSourceManager(0);
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CI.setFileManager(0);
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}
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if (HasBegunSourceFile)
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CI.getDiagnosticClient().EndSourceFile();
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CI.clearOutputFiles(/*EraseFiles=*/true);
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setCurrentInput(FrontendInputFile());
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setCompilerInstance(0);
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return false;
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}
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bool FrontendAction::Execute() {
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CompilerInstance &CI = getCompilerInstance();
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// Initialize the main file entry. This needs to be delayed until after PCH
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// has loaded.
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if (!isCurrentFileAST()) {
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if (!CI.InitializeSourceManager(getCurrentInput()))
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return false;
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}
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if (CI.hasFrontendTimer()) {
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llvm::TimeRegion Timer(CI.getFrontendTimer());
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ExecuteAction();
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}
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else ExecuteAction();
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// If we are supposed to rebuild the global module index, do so now unless
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// there were any module-build failures.
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if (CI.shouldBuildGlobalModuleIndex() && CI.hasFileManager() &&
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CI.hasPreprocessor()) {
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GlobalModuleIndex::writeIndex(
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CI.getFileManager(),
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CI.getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
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}
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return true;
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}
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void FrontendAction::EndSourceFile() {
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CompilerInstance &CI = getCompilerInstance();
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// Inform the diagnostic client we are done with this source file.
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CI.getDiagnosticClient().EndSourceFile();
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// Finalize the action.
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EndSourceFileAction();
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// Release the consumer and the AST, in that order since the consumer may
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// perform actions in its destructor which require the context.
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//
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// FIXME: There is more per-file stuff we could just drop here?
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if (CI.getFrontendOpts().DisableFree) {
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CI.takeASTConsumer();
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if (!isCurrentFileAST()) {
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CI.takeSema();
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CI.resetAndLeakASTContext();
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}
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} else {
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if (!isCurrentFileAST()) {
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CI.setSema(0);
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CI.setASTContext(0);
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}
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CI.setASTConsumer(0);
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}
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// Inform the preprocessor we are done.
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if (CI.hasPreprocessor())
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CI.getPreprocessor().EndSourceFile();
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if (CI.getFrontendOpts().ShowStats) {
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llvm::errs() << "\nSTATISTICS FOR '" << getCurrentFile() << "':\n";
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CI.getPreprocessor().PrintStats();
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CI.getPreprocessor().getIdentifierTable().PrintStats();
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CI.getPreprocessor().getHeaderSearchInfo().PrintStats();
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CI.getSourceManager().PrintStats();
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llvm::errs() << "\n";
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}
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// Cleanup the output streams, and erase the output files if instructed by the
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// FrontendAction.
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CI.clearOutputFiles(/*EraseFiles=*/shouldEraseOutputFiles());
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if (isCurrentFileAST()) {
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CI.takeSema();
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CI.resetAndLeakASTContext();
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CI.resetAndLeakPreprocessor();
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CI.resetAndLeakSourceManager();
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CI.resetAndLeakFileManager();
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}
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setCompilerInstance(0);
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setCurrentInput(FrontendInputFile());
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}
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bool FrontendAction::shouldEraseOutputFiles() {
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return getCompilerInstance().getDiagnostics().hasErrorOccurred();
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}
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//===----------------------------------------------------------------------===//
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// Utility Actions
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//===----------------------------------------------------------------------===//
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void ASTFrontendAction::ExecuteAction() {
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CompilerInstance &CI = getCompilerInstance();
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if (!CI.hasPreprocessor())
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return;
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// FIXME: Move the truncation aspect of this into Sema, we delayed this till
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// here so the source manager would be initialized.
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if (hasCodeCompletionSupport() &&
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!CI.getFrontendOpts().CodeCompletionAt.FileName.empty())
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CI.createCodeCompletionConsumer();
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// Use a code completion consumer?
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CodeCompleteConsumer *CompletionConsumer = 0;
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if (CI.hasCodeCompletionConsumer())
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CompletionConsumer = &CI.getCodeCompletionConsumer();
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if (!CI.hasSema())
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CI.createSema(getTranslationUnitKind(), CompletionConsumer);
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ParseAST(CI.getSema(), CI.getFrontendOpts().ShowStats,
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CI.getFrontendOpts().SkipFunctionBodies);
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}
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void PluginASTAction::anchor() { }
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ASTConsumer *
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PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
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}
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ASTConsumer *WrapperFrontendAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return WrappedAction->CreateASTConsumer(CI, InFile);
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}
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bool WrapperFrontendAction::BeginInvocation(CompilerInstance &CI) {
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return WrappedAction->BeginInvocation(CI);
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}
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bool WrapperFrontendAction::BeginSourceFileAction(CompilerInstance &CI,
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StringRef Filename) {
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WrappedAction->setCurrentInput(getCurrentInput());
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WrappedAction->setCompilerInstance(&CI);
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return WrappedAction->BeginSourceFileAction(CI, Filename);
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}
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void WrapperFrontendAction::ExecuteAction() {
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WrappedAction->ExecuteAction();
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}
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void WrapperFrontendAction::EndSourceFileAction() {
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WrappedAction->EndSourceFileAction();
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}
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bool WrapperFrontendAction::usesPreprocessorOnly() const {
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return WrappedAction->usesPreprocessorOnly();
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}
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TranslationUnitKind WrapperFrontendAction::getTranslationUnitKind() {
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return WrappedAction->getTranslationUnitKind();
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}
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bool WrapperFrontendAction::hasPCHSupport() const {
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return WrappedAction->hasPCHSupport();
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|
}
|
|
bool WrapperFrontendAction::hasASTFileSupport() const {
|
|
return WrappedAction->hasASTFileSupport();
|
|
}
|
|
bool WrapperFrontendAction::hasIRSupport() const {
|
|
return WrappedAction->hasIRSupport();
|
|
}
|
|
bool WrapperFrontendAction::hasCodeCompletionSupport() const {
|
|
return WrappedAction->hasCodeCompletionSupport();
|
|
}
|
|
|
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WrapperFrontendAction::WrapperFrontendAction(FrontendAction *WrappedAction)
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: WrappedAction(WrappedAction) {}
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|
|