forked from OSchip/llvm-project
1124 lines
42 KiB
C++
1124 lines
42 KiB
C++
//===--- FrontendAction.cpp -----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/Basic/Builtins.h"
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#include "clang/Basic/LangStandard.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/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/Frontend/Utils.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Lex/LiteralSupport.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Lex/PreprocessorOptions.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/BuryPointer.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/Path.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 <system_error>
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using namespace clang;
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LLVM_INSTANTIATE_REGISTRY(FrontendPluginRegistry)
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namespace {
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class DelegatingDeserializationListener : public ASTDeserializationListener {
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ASTDeserializationListener *Previous;
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bool DeletePrevious;
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public:
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explicit DelegatingDeserializationListener(
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ASTDeserializationListener *Previous, bool DeletePrevious)
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: Previous(Previous), DeletePrevious(DeletePrevious) {}
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~DelegatingDeserializationListener() override {
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if (DeletePrevious)
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delete Previous;
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}
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void ReaderInitialized(ASTReader *Reader) override {
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if (Previous)
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Previous->ReaderInitialized(Reader);
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}
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void IdentifierRead(serialization::IdentID ID,
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IdentifierInfo *II) override {
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if (Previous)
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Previous->IdentifierRead(ID, II);
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}
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void TypeRead(serialization::TypeIdx Idx, QualType T) override {
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if (Previous)
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Previous->TypeRead(Idx, T);
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}
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void DeclRead(serialization::DeclID ID, const Decl *D) override {
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if (Previous)
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Previous->DeclRead(ID, D);
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}
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void SelectorRead(serialization::SelectorID ID, Selector Sel) override {
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if (Previous)
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Previous->SelectorRead(ID, Sel);
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}
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void MacroDefinitionRead(serialization::PreprocessedEntityID PPID,
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MacroDefinitionRecord *MD) override {
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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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/// 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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bool DeletePrevious)
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: DelegatingDeserializationListener(Previous, DeletePrevious) {}
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void DeclRead(serialization::DeclID ID, const Decl *D) override {
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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() << " - ";
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ND->printQualifiedName(llvm::outs());
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}
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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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/// 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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bool DeletePrevious)
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: DelegatingDeserializationListener(Previous, DeletePrevious), Ctx(Ctx),
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NamesToCheck(NamesToCheck) {}
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void DeclRead(serialization::DeclID ID, const Decl *D) override {
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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(nullptr) {}
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FrontendAction::~FrontendAction() {}
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void FrontendAction::setCurrentInput(const FrontendInputFile &CurrentInput,
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std::unique_ptr<ASTUnit> AST) {
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this->CurrentInput = CurrentInput;
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CurrentASTUnit = std::move(AST);
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}
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Module *FrontendAction::getCurrentModule() const {
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CompilerInstance &CI = getCompilerInstance();
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return CI.getPreprocessor().getHeaderSearchInfo().lookupModule(
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CI.getLangOpts().CurrentModule, /*AllowSearch*/false);
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}
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std::unique_ptr<ASTConsumer>
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FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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std::unique_ptr<ASTConsumer> Consumer = CreateASTConsumer(CI, InFile);
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if (!Consumer)
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return nullptr;
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// Validate -add-plugin args.
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bool FoundAllPlugins = true;
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for (const std::string &Arg : CI.getFrontendOpts().AddPluginActions) {
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bool Found = false;
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for (FrontendPluginRegistry::iterator it = FrontendPluginRegistry::begin(),
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ie = FrontendPluginRegistry::end();
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it != ie; ++it) {
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if (it->getName() == Arg)
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Found = true;
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}
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if (!Found) {
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CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name) << Arg;
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FoundAllPlugins = false;
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}
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}
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if (!FoundAllPlugins)
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return nullptr;
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// If there are no registered plugins we don't need to wrap the consumer
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if (FrontendPluginRegistry::begin() == FrontendPluginRegistry::end())
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return Consumer;
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// If this is a code completion run, avoid invoking the plugin consumers
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if (CI.hasCodeCompletionConsumer())
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return Consumer;
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// Collect the list of plugins that go before the main action (in Consumers)
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// or after it (in AfterConsumers)
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std::vector<std::unique_ptr<ASTConsumer>> Consumers;
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std::vector<std::unique_ptr<ASTConsumer>> AfterConsumers;
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for (FrontendPluginRegistry::iterator it = FrontendPluginRegistry::begin(),
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ie = FrontendPluginRegistry::end();
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it != ie; ++it) {
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std::unique_ptr<PluginASTAction> P = it->instantiate();
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PluginASTAction::ActionType ActionType = P->getActionType();
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if (ActionType == PluginASTAction::Cmdline) {
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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 (size_t i = 0, e = CI.getFrontendOpts().AddPluginActions.size();
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i != e; ++i) {
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if (it->getName() == CI.getFrontendOpts().AddPluginActions[i]) {
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ActionType = PluginASTAction::AddAfterMainAction;
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break;
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}
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}
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}
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if ((ActionType == PluginASTAction::AddBeforeMainAction ||
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ActionType == PluginASTAction::AddAfterMainAction) &&
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P->ParseArgs(
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CI, CI.getFrontendOpts().PluginArgs[std::string(it->getName())])) {
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std::unique_ptr<ASTConsumer> PluginConsumer = P->CreateASTConsumer(CI, InFile);
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if (ActionType == PluginASTAction::AddBeforeMainAction) {
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Consumers.push_back(std::move(PluginConsumer));
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} else {
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AfterConsumers.push_back(std::move(PluginConsumer));
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}
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}
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}
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// Add to Consumers the main consumer, then all the plugins that go after it
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Consumers.push_back(std::move(Consumer));
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for (auto &C : AfterConsumers) {
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Consumers.push_back(std::move(C));
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}
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return std::make_unique<MultiplexConsumer>(std::move(Consumers));
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}
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/// For preprocessed files, if the first line is the linemarker and specifies
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/// the original source file name, use that name as the input file name.
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/// Returns the location of the first token after the line marker directive.
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///
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/// \param CI The compiler instance.
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/// \param InputFile Populated with the filename from the line marker.
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/// \param IsModuleMap If \c true, add a line note corresponding to this line
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/// directive. (We need to do this because the directive will not be
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/// visited by the preprocessor.)
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static SourceLocation ReadOriginalFileName(CompilerInstance &CI,
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std::string &InputFile,
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bool IsModuleMap = false) {
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auto &SourceMgr = CI.getSourceManager();
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auto MainFileID = SourceMgr.getMainFileID();
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bool Invalid = false;
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const auto *MainFileBuf = SourceMgr.getBuffer(MainFileID, &Invalid);
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if (Invalid)
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return SourceLocation();
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std::unique_ptr<Lexer> RawLexer(
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new Lexer(MainFileID, MainFileBuf, SourceMgr, CI.getLangOpts()));
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// If the first line has the syntax of
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//
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// # NUM "FILENAME"
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//
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// we use FILENAME as the input file name.
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Token T;
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if (RawLexer->LexFromRawLexer(T) || T.getKind() != tok::hash)
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return SourceLocation();
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if (RawLexer->LexFromRawLexer(T) || T.isAtStartOfLine() ||
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T.getKind() != tok::numeric_constant)
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return SourceLocation();
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unsigned LineNo;
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SourceLocation LineNoLoc = T.getLocation();
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if (IsModuleMap) {
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llvm::SmallString<16> Buffer;
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if (Lexer::getSpelling(LineNoLoc, Buffer, SourceMgr, CI.getLangOpts())
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.getAsInteger(10, LineNo))
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return SourceLocation();
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}
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RawLexer->LexFromRawLexer(T);
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if (T.isAtStartOfLine() || T.getKind() != tok::string_literal)
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return SourceLocation();
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StringLiteralParser Literal(T, CI.getPreprocessor());
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if (Literal.hadError)
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return SourceLocation();
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RawLexer->LexFromRawLexer(T);
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if (T.isNot(tok::eof) && !T.isAtStartOfLine())
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return SourceLocation();
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InputFile = Literal.GetString().str();
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if (IsModuleMap)
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CI.getSourceManager().AddLineNote(
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LineNoLoc, LineNo, SourceMgr.getLineTableFilenameID(InputFile), false,
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false, SrcMgr::C_User_ModuleMap);
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return T.getLocation();
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}
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static SmallVectorImpl<char> &
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operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
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Includes.append(RHS.begin(), RHS.end());
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return Includes;
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}
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static void addHeaderInclude(StringRef HeaderName,
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SmallVectorImpl<char> &Includes,
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const LangOptions &LangOpts,
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bool IsExternC) {
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if (IsExternC && LangOpts.CPlusPlus)
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Includes += "extern \"C\" {\n";
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if (LangOpts.ObjC)
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Includes += "#import \"";
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else
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Includes += "#include \"";
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Includes += HeaderName;
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Includes += "\"\n";
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if (IsExternC && LangOpts.CPlusPlus)
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Includes += "}\n";
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}
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/// Collect the set of header includes needed to construct the given
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/// module and update the TopHeaders file set of the module.
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///
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/// \param Module The module we're collecting includes from.
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///
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/// \param Includes Will be augmented with the set of \#includes or \#imports
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/// needed to load all of the named headers.
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static std::error_code collectModuleHeaderIncludes(
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const LangOptions &LangOpts, FileManager &FileMgr, DiagnosticsEngine &Diag,
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ModuleMap &ModMap, clang::Module *Module, SmallVectorImpl<char> &Includes) {
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// Don't collect any headers for unavailable modules.
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if (!Module->isAvailable())
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return std::error_code();
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// Resolve all lazy header directives to header files.
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ModMap.resolveHeaderDirectives(Module);
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// If any headers are missing, we can't build this module. In most cases,
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// diagnostics for this should have already been produced; we only get here
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// if explicit stat information was provided.
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// FIXME: If the name resolves to a file with different stat information,
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// produce a better diagnostic.
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if (!Module->MissingHeaders.empty()) {
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auto &MissingHeader = Module->MissingHeaders.front();
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Diag.Report(MissingHeader.FileNameLoc, diag::err_module_header_missing)
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<< MissingHeader.IsUmbrella << MissingHeader.FileName;
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return std::error_code();
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}
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// Add includes for each of these headers.
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for (auto HK : {Module::HK_Normal, Module::HK_Private}) {
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for (Module::Header &H : Module->Headers[HK]) {
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Module->addTopHeader(H.Entry);
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// Use the path as specified in the module map file. We'll look for this
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// file relative to the module build directory (the directory containing
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// the module map file) so this will find the same file that we found
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// while parsing the module map.
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addHeaderInclude(H.NameAsWritten, Includes, LangOpts, Module->IsExternC);
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}
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}
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// Note that Module->PrivateHeaders will not be a TopHeader.
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if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader()) {
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Module->addTopHeader(UmbrellaHeader.Entry);
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if (Module->Parent)
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// Include the umbrella header for submodules.
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addHeaderInclude(UmbrellaHeader.NameAsWritten, Includes, LangOpts,
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Module->IsExternC);
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} else if (Module::DirectoryName UmbrellaDir = Module->getUmbrellaDir()) {
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// Add all of the headers we find in this subdirectory.
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std::error_code EC;
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SmallString<128> DirNative;
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llvm::sys::path::native(UmbrellaDir.Entry->getName(), DirNative);
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llvm::vfs::FileSystem &FS = FileMgr.getVirtualFileSystem();
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SmallVector<std::pair<std::string, const FileEntry *>, 8> Headers;
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for (llvm::vfs::recursive_directory_iterator Dir(FS, DirNative, EC), End;
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Dir != End && !EC; Dir.increment(EC)) {
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// Check whether this entry has an extension typically associated with
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// headers.
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if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
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.Cases(".h", ".H", ".hh", ".hpp", true)
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.Default(false))
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continue;
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auto Header = FileMgr.getFile(Dir->path());
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// FIXME: This shouldn't happen unless there is a file system race. Is
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// that worth diagnosing?
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if (!Header)
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continue;
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// If this header is marked 'unavailable' in this module, don't include
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// it.
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if (ModMap.isHeaderUnavailableInModule(*Header, Module))
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continue;
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// Compute the relative path from the directory to this file.
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SmallVector<StringRef, 16> Components;
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auto PathIt = llvm::sys::path::rbegin(Dir->path());
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for (int I = 0; I != Dir.level() + 1; ++I, ++PathIt)
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Components.push_back(*PathIt);
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SmallString<128> RelativeHeader(UmbrellaDir.NameAsWritten);
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for (auto It = Components.rbegin(), End = Components.rend(); It != End;
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++It)
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llvm::sys::path::append(RelativeHeader, *It);
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std::string RelName = RelativeHeader.c_str();
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Headers.push_back(std::make_pair(RelName, *Header));
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}
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if (EC)
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return EC;
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// Sort header paths and make the header inclusion order deterministic
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// across different OSs and filesystems.
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llvm::sort(Headers.begin(), Headers.end(), [](
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const std::pair<std::string, const FileEntry *> &LHS,
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const std::pair<std::string, const FileEntry *> &RHS) {
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return LHS.first < RHS.first;
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});
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for (auto &H : Headers) {
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// Include this header as part of the umbrella directory.
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Module->addTopHeader(H.second);
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addHeaderInclude(H.first, Includes, LangOpts, Module->IsExternC);
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}
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}
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// Recurse into submodules.
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for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
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SubEnd = Module->submodule_end();
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Sub != SubEnd; ++Sub)
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if (std::error_code Err = collectModuleHeaderIncludes(
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LangOpts, FileMgr, Diag, ModMap, *Sub, Includes))
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return Err;
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return std::error_code();
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}
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static bool loadModuleMapForModuleBuild(CompilerInstance &CI, bool IsSystem,
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bool IsPreprocessed,
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std::string &PresumedModuleMapFile,
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unsigned &Offset) {
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auto &SrcMgr = CI.getSourceManager();
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HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
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// Map the current input to a file.
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FileID ModuleMapID = SrcMgr.getMainFileID();
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const FileEntry *ModuleMap = SrcMgr.getFileEntryForID(ModuleMapID);
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// If the module map is preprocessed, handle the initial line marker;
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// line directives are not part of the module map syntax in general.
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Offset = 0;
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if (IsPreprocessed) {
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SourceLocation EndOfLineMarker =
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ReadOriginalFileName(CI, PresumedModuleMapFile, /*IsModuleMap*/ true);
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if (EndOfLineMarker.isValid())
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Offset = CI.getSourceManager().getDecomposedLoc(EndOfLineMarker).second;
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}
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// Load the module map file.
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if (HS.loadModuleMapFile(ModuleMap, IsSystem, ModuleMapID, &Offset,
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PresumedModuleMapFile))
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return true;
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if (SrcMgr.getBuffer(ModuleMapID)->getBufferSize() == Offset)
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Offset = 0;
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return false;
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}
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static Module *prepareToBuildModule(CompilerInstance &CI,
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StringRef ModuleMapFilename) {
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if (CI.getLangOpts().CurrentModule.empty()) {
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CI.getDiagnostics().Report(diag::err_missing_module_name);
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// FIXME: Eventually, we could consider asking whether there was just
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// a single module described in the module map, and use that as a
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// default. Then it would be fairly trivial to just "compile" a module
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// map with a single module (the common case).
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return nullptr;
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}
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// Dig out the module definition.
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HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
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Module *M = HS.lookupModule(CI.getLangOpts().CurrentModule,
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/*AllowSearch=*/false);
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if (!M) {
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|
CI.getDiagnostics().Report(diag::err_missing_module)
|
|
<< CI.getLangOpts().CurrentModule << ModuleMapFilename;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
// Check whether we can build this module at all.
|
|
if (Preprocessor::checkModuleIsAvailable(CI.getLangOpts(), CI.getTarget(),
|
|
CI.getDiagnostics(), M))
|
|
return nullptr;
|
|
|
|
// Inform the preprocessor that includes from within the input buffer should
|
|
// be resolved relative to the build directory of the module map file.
|
|
CI.getPreprocessor().setMainFileDir(M->Directory);
|
|
|
|
// If the module was inferred from a different module map (via an expanded
|
|
// umbrella module definition), track that fact.
|
|
// FIXME: It would be preferable to fill this in as part of processing
|
|
// the module map, rather than adding it after the fact.
|
|
StringRef OriginalModuleMapName = CI.getFrontendOpts().OriginalModuleMap;
|
|
if (!OriginalModuleMapName.empty()) {
|
|
auto OriginalModuleMap =
|
|
CI.getFileManager().getFile(OriginalModuleMapName,
|
|
/*openFile*/ true);
|
|
if (!OriginalModuleMap) {
|
|
CI.getDiagnostics().Report(diag::err_module_map_not_found)
|
|
<< OriginalModuleMapName;
|
|
return nullptr;
|
|
}
|
|
if (*OriginalModuleMap != CI.getSourceManager().getFileEntryForID(
|
|
CI.getSourceManager().getMainFileID())) {
|
|
M->IsInferred = true;
|
|
CI.getPreprocessor().getHeaderSearchInfo().getModuleMap()
|
|
.setInferredModuleAllowedBy(M, *OriginalModuleMap);
|
|
}
|
|
}
|
|
|
|
// If we're being run from the command-line, the module build stack will not
|
|
// have been filled in yet, so complete it now in order to allow us to detect
|
|
// module cycles.
|
|
SourceManager &SourceMgr = CI.getSourceManager();
|
|
if (SourceMgr.getModuleBuildStack().empty())
|
|
SourceMgr.pushModuleBuildStack(CI.getLangOpts().CurrentModule,
|
|
FullSourceLoc(SourceLocation(), SourceMgr));
|
|
return M;
|
|
}
|
|
|
|
/// Compute the input buffer that should be used to build the specified module.
|
|
static std::unique_ptr<llvm::MemoryBuffer>
|
|
getInputBufferForModule(CompilerInstance &CI, Module *M) {
|
|
FileManager &FileMgr = CI.getFileManager();
|
|
|
|
// Collect the set of #includes we need to build the module.
|
|
SmallString<256> HeaderContents;
|
|
std::error_code Err = std::error_code();
|
|
if (Module::Header UmbrellaHeader = M->getUmbrellaHeader())
|
|
addHeaderInclude(UmbrellaHeader.NameAsWritten, HeaderContents,
|
|
CI.getLangOpts(), M->IsExternC);
|
|
Err = collectModuleHeaderIncludes(
|
|
CI.getLangOpts(), FileMgr, CI.getDiagnostics(),
|
|
CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), M,
|
|
HeaderContents);
|
|
|
|
if (Err) {
|
|
CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
|
|
<< M->getFullModuleName() << Err.message();
|
|
return nullptr;
|
|
}
|
|
|
|
return llvm::MemoryBuffer::getMemBufferCopy(
|
|
HeaderContents, Module::getModuleInputBufferName());
|
|
}
|
|
|
|
bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
|
|
const FrontendInputFile &RealInput) {
|
|
FrontendInputFile Input(RealInput);
|
|
assert(!Instance && "Already processing a source file!");
|
|
assert(!Input.isEmpty() && "Unexpected empty filename!");
|
|
setCurrentInput(Input);
|
|
setCompilerInstance(&CI);
|
|
|
|
bool HasBegunSourceFile = false;
|
|
bool ReplayASTFile = Input.getKind().getFormat() == InputKind::Precompiled &&
|
|
usesPreprocessorOnly();
|
|
if (!BeginInvocation(CI))
|
|
goto failure;
|
|
|
|
// If we're replaying the build of an AST file, import it and set up
|
|
// the initial state from its build.
|
|
if (ReplayASTFile) {
|
|
IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
|
|
|
|
// The AST unit populates its own diagnostics engine rather than ours.
|
|
IntrusiveRefCntPtr<DiagnosticsEngine> ASTDiags(
|
|
new DiagnosticsEngine(Diags->getDiagnosticIDs(),
|
|
&Diags->getDiagnosticOptions()));
|
|
ASTDiags->setClient(Diags->getClient(), /*OwnsClient*/false);
|
|
|
|
// FIXME: What if the input is a memory buffer?
|
|
StringRef InputFile = Input.getFile();
|
|
|
|
std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromASTFile(
|
|
std::string(InputFile), CI.getPCHContainerReader(),
|
|
ASTUnit::LoadPreprocessorOnly, ASTDiags, CI.getFileSystemOpts(),
|
|
CI.getCodeGenOpts().DebugTypeExtRefs);
|
|
if (!AST)
|
|
goto failure;
|
|
|
|
// Options relating to how we treat the input (but not what we do with it)
|
|
// are inherited from the AST unit.
|
|
CI.getHeaderSearchOpts() = AST->getHeaderSearchOpts();
|
|
CI.getPreprocessorOpts() = AST->getPreprocessorOpts();
|
|
CI.getLangOpts() = AST->getLangOpts();
|
|
|
|
// 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.createSourceManager(CI.getFileManager());
|
|
CI.getSourceManager().initializeForReplay(AST->getSourceManager());
|
|
|
|
// Preload all the module files loaded transitively by the AST unit. Also
|
|
// load all module map files that were parsed as part of building the AST
|
|
// unit.
|
|
if (auto ASTReader = AST->getASTReader()) {
|
|
auto &MM = ASTReader->getModuleManager();
|
|
auto &PrimaryModule = MM.getPrimaryModule();
|
|
|
|
for (serialization::ModuleFile &MF : MM)
|
|
if (&MF != &PrimaryModule)
|
|
CI.getFrontendOpts().ModuleFiles.push_back(MF.FileName);
|
|
|
|
ASTReader->visitTopLevelModuleMaps(
|
|
PrimaryModule, [&](const FileEntry *FE) {
|
|
CI.getFrontendOpts().ModuleMapFiles.push_back(
|
|
std::string(FE->getName()));
|
|
});
|
|
}
|
|
|
|
// Set up the input file for replay purposes.
|
|
auto Kind = AST->getInputKind();
|
|
if (Kind.getFormat() == InputKind::ModuleMap) {
|
|
Module *ASTModule =
|
|
AST->getPreprocessor().getHeaderSearchInfo().lookupModule(
|
|
AST->getLangOpts().CurrentModule, /*AllowSearch*/ false);
|
|
assert(ASTModule && "module file does not define its own module");
|
|
Input = FrontendInputFile(ASTModule->PresumedModuleMapFile, Kind);
|
|
} else {
|
|
auto &OldSM = AST->getSourceManager();
|
|
FileID ID = OldSM.getMainFileID();
|
|
if (auto *File = OldSM.getFileEntryForID(ID))
|
|
Input = FrontendInputFile(File->getName(), Kind);
|
|
else
|
|
Input = FrontendInputFile(OldSM.getBuffer(ID), Kind);
|
|
}
|
|
setCurrentInput(Input, std::move(AST));
|
|
}
|
|
|
|
// AST files follow a very different path, since they share objects via the
|
|
// AST unit.
|
|
if (Input.getKind().getFormat() == InputKind::Precompiled) {
|
|
assert(!usesPreprocessorOnly() && "this case was handled above");
|
|
assert(hasASTFileSupport() &&
|
|
"This action does not have AST file support!");
|
|
|
|
IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
|
|
|
|
// FIXME: What if the input is a memory buffer?
|
|
StringRef InputFile = Input.getFile();
|
|
|
|
std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromASTFile(
|
|
std::string(InputFile), CI.getPCHContainerReader(),
|
|
ASTUnit::LoadEverything, Diags, CI.getFileSystemOpts(),
|
|
CI.getCodeGenOpts().DebugTypeExtRefs);
|
|
|
|
if (!AST)
|
|
goto failure;
|
|
|
|
// Inform the diagnostic client we are processing a source file.
|
|
CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);
|
|
HasBegunSourceFile = true;
|
|
|
|
// 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->getPreprocessorPtr());
|
|
Preprocessor &PP = CI.getPreprocessor();
|
|
PP.getBuiltinInfo().initializeBuiltins(PP.getIdentifierTable(),
|
|
PP.getLangOpts());
|
|
CI.setASTContext(&AST->getASTContext());
|
|
|
|
setCurrentInput(Input, std::move(AST));
|
|
|
|
// Initialize the action.
|
|
if (!BeginSourceFileAction(CI))
|
|
goto failure;
|
|
|
|
// Create the AST consumer.
|
|
CI.setASTConsumer(CreateWrappedASTConsumer(CI, InputFile));
|
|
if (!CI.hasASTConsumer())
|
|
goto failure;
|
|
|
|
return true;
|
|
}
|
|
|
|
// Set up the file and source managers, if needed.
|
|
if (!CI.hasFileManager()) {
|
|
if (!CI.createFileManager()) {
|
|
goto failure;
|
|
}
|
|
}
|
|
if (!CI.hasSourceManager())
|
|
CI.createSourceManager(CI.getFileManager());
|
|
|
|
// Set up embedding for any specified files. Do this before we load any
|
|
// source files, including the primary module map for the compilation.
|
|
for (const auto &F : CI.getFrontendOpts().ModulesEmbedFiles) {
|
|
if (auto FE = CI.getFileManager().getFile(F, /*openFile*/true))
|
|
CI.getSourceManager().setFileIsTransient(*FE);
|
|
else
|
|
CI.getDiagnostics().Report(diag::err_modules_embed_file_not_found) << F;
|
|
}
|
|
if (CI.getFrontendOpts().ModulesEmbedAllFiles)
|
|
CI.getSourceManager().setAllFilesAreTransient(true);
|
|
|
|
// IR files bypass the rest of initialization.
|
|
if (Input.getKind().getLanguage() == Language::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(), nullptr);
|
|
HasBegunSourceFile = true;
|
|
|
|
// Initialize the action.
|
|
if (!BeginSourceFileAction(CI))
|
|
goto failure;
|
|
|
|
// Initialize the main file entry.
|
|
if (!CI.InitializeSourceManager(CurrentInput))
|
|
goto failure;
|
|
|
|
return true;
|
|
}
|
|
|
|
// If the implicit PCH include is actually a directory, rather than
|
|
// a single file, search for a suitable PCH file in that directory.
|
|
if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
|
|
FileManager &FileMgr = CI.getFileManager();
|
|
PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
|
|
StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
|
|
std::string SpecificModuleCachePath = CI.getSpecificModuleCachePath();
|
|
if (auto PCHDir = FileMgr.getDirectory(PCHInclude)) {
|
|
std::error_code EC;
|
|
SmallString<128> DirNative;
|
|
llvm::sys::path::native((*PCHDir)->getName(), DirNative);
|
|
bool Found = false;
|
|
llvm::vfs::FileSystem &FS = FileMgr.getVirtualFileSystem();
|
|
for (llvm::vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC),
|
|
DirEnd;
|
|
Dir != DirEnd && !EC; Dir.increment(EC)) {
|
|
// Check whether this is an acceptable AST file.
|
|
if (ASTReader::isAcceptableASTFile(
|
|
Dir->path(), FileMgr, CI.getPCHContainerReader(),
|
|
CI.getLangOpts(), CI.getTargetOpts(), CI.getPreprocessorOpts(),
|
|
SpecificModuleCachePath)) {
|
|
PPOpts.ImplicitPCHInclude = std::string(Dir->path());
|
|
Found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!Found) {
|
|
CI.getDiagnostics().Report(diag::err_fe_no_pch_in_dir) << PCHInclude;
|
|
goto failure;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Set up the preprocessor if needed. When parsing model files the
|
|
// preprocessor of the original source is reused.
|
|
if (!isModelParsingAction())
|
|
CI.createPreprocessor(getTranslationUnitKind());
|
|
|
|
// Inform the diagnostic client we are processing a source file.
|
|
CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(),
|
|
&CI.getPreprocessor());
|
|
HasBegunSourceFile = true;
|
|
|
|
// Initialize the main file entry.
|
|
if (!CI.InitializeSourceManager(Input))
|
|
goto failure;
|
|
|
|
// For module map files, we first parse the module map and synthesize a
|
|
// "<module-includes>" buffer before more conventional processing.
|
|
if (Input.getKind().getFormat() == InputKind::ModuleMap) {
|
|
CI.getLangOpts().setCompilingModule(LangOptions::CMK_ModuleMap);
|
|
|
|
std::string PresumedModuleMapFile;
|
|
unsigned OffsetToContents;
|
|
if (loadModuleMapForModuleBuild(CI, Input.isSystem(),
|
|
Input.isPreprocessed(),
|
|
PresumedModuleMapFile, OffsetToContents))
|
|
goto failure;
|
|
|
|
auto *CurrentModule = prepareToBuildModule(CI, Input.getFile());
|
|
if (!CurrentModule)
|
|
goto failure;
|
|
|
|
CurrentModule->PresumedModuleMapFile = PresumedModuleMapFile;
|
|
|
|
if (OffsetToContents)
|
|
// If the module contents are in the same file, skip to them.
|
|
CI.getPreprocessor().setSkipMainFilePreamble(OffsetToContents, true);
|
|
else {
|
|
// Otherwise, convert the module description to a suitable input buffer.
|
|
auto Buffer = getInputBufferForModule(CI, CurrentModule);
|
|
if (!Buffer)
|
|
goto failure;
|
|
|
|
// Reinitialize the main file entry to refer to the new input.
|
|
auto Kind = CurrentModule->IsSystem ? SrcMgr::C_System : SrcMgr::C_User;
|
|
auto &SourceMgr = CI.getSourceManager();
|
|
auto BufferID = SourceMgr.createFileID(std::move(Buffer), Kind);
|
|
assert(BufferID.isValid() && "couldn't create module buffer ID");
|
|
SourceMgr.setMainFileID(BufferID);
|
|
}
|
|
}
|
|
|
|
// Initialize the action.
|
|
if (!BeginSourceFileAction(CI))
|
|
goto failure;
|
|
|
|
// If we were asked to load any module map files, do so now.
|
|
for (const auto &Filename : CI.getFrontendOpts().ModuleMapFiles) {
|
|
if (auto File = CI.getFileManager().getFile(Filename))
|
|
CI.getPreprocessor().getHeaderSearchInfo().loadModuleMapFile(
|
|
*File, /*IsSystem*/false);
|
|
else
|
|
CI.getDiagnostics().Report(diag::err_module_map_not_found) << Filename;
|
|
}
|
|
|
|
// Add a module declaration scope so that modules from -fmodule-map-file
|
|
// arguments may shadow modules found implicitly in search paths.
|
|
CI.getPreprocessor()
|
|
.getHeaderSearchInfo()
|
|
.getModuleMap()
|
|
.finishModuleDeclarationScope();
|
|
|
|
// Create the AST context and consumer unless this is a preprocessor only
|
|
// action.
|
|
if (!usesPreprocessorOnly()) {
|
|
// Parsing a model file should reuse the existing ASTContext.
|
|
if (!isModelParsingAction())
|
|
CI.createASTContext();
|
|
|
|
// For preprocessed files, check if the first line specifies the original
|
|
// source file name with a linemarker.
|
|
std::string PresumedInputFile = std::string(getCurrentFileOrBufferName());
|
|
if (Input.isPreprocessed())
|
|
ReadOriginalFileName(CI, PresumedInputFile);
|
|
|
|
std::unique_ptr<ASTConsumer> Consumer =
|
|
CreateWrappedASTConsumer(CI, PresumedInputFile);
|
|
if (!Consumer)
|
|
goto failure;
|
|
|
|
// FIXME: should not overwrite ASTMutationListener when parsing model files?
|
|
if (!isModelParsingAction())
|
|
CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
|
|
|
|
if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
|
|
// Convert headers to PCH and chain them.
|
|
IntrusiveRefCntPtr<ExternalSemaSource> source, FinalReader;
|
|
source = createChainedIncludesSource(CI, FinalReader);
|
|
if (!source)
|
|
goto failure;
|
|
CI.setASTReader(static_cast<ASTReader *>(FinalReader.get()));
|
|
CI.getASTContext().setExternalSource(source);
|
|
} else if (CI.getLangOpts().Modules ||
|
|
!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
|
|
// Use PCM or PCH.
|
|
assert(hasPCHSupport() && "This action does not have PCH support!");
|
|
ASTDeserializationListener *DeserialListener =
|
|
Consumer->GetASTDeserializationListener();
|
|
bool DeleteDeserialListener = false;
|
|
if (CI.getPreprocessorOpts().DumpDeserializedPCHDecls) {
|
|
DeserialListener = new DeserializedDeclsDumper(DeserialListener,
|
|
DeleteDeserialListener);
|
|
DeleteDeserialListener = true;
|
|
}
|
|
if (!CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn.empty()) {
|
|
DeserialListener = new DeserializedDeclsChecker(
|
|
CI.getASTContext(),
|
|
CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn,
|
|
DeserialListener, DeleteDeserialListener);
|
|
DeleteDeserialListener = true;
|
|
}
|
|
if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
|
|
CI.createPCHExternalASTSource(
|
|
CI.getPreprocessorOpts().ImplicitPCHInclude,
|
|
CI.getPreprocessorOpts().DisablePCHValidation,
|
|
CI.getPreprocessorOpts().AllowPCHWithCompilerErrors, DeserialListener,
|
|
DeleteDeserialListener);
|
|
if (!CI.getASTContext().getExternalSource())
|
|
goto failure;
|
|
}
|
|
// If modules are enabled, create the AST reader before creating
|
|
// any builtins, so that all declarations know that they might be
|
|
// extended by an external source.
|
|
if (CI.getLangOpts().Modules || !CI.hasASTContext() ||
|
|
!CI.getASTContext().getExternalSource()) {
|
|
CI.createASTReader();
|
|
CI.getASTReader()->setDeserializationListener(DeserialListener,
|
|
DeleteDeserialListener);
|
|
}
|
|
}
|
|
|
|
CI.setASTConsumer(std::move(Consumer));
|
|
if (!CI.hasASTConsumer())
|
|
goto failure;
|
|
}
|
|
|
|
// Initialize built-in info as long as we aren't using an external AST
|
|
// source.
|
|
if (CI.getLangOpts().Modules || !CI.hasASTContext() ||
|
|
!CI.getASTContext().getExternalSource()) {
|
|
Preprocessor &PP = CI.getPreprocessor();
|
|
PP.getBuiltinInfo().initializeBuiltins(PP.getIdentifierTable(),
|
|
PP.getLangOpts());
|
|
} else {
|
|
// FIXME: If this is a problem, recover from it by creating a multiplex
|
|
// source.
|
|
assert((!CI.getLangOpts().Modules || CI.getASTReader()) &&
|
|
"modules enabled but created an external source that "
|
|
"doesn't support modules");
|
|
}
|
|
|
|
// If we were asked to load any module files, do so now.
|
|
for (const auto &ModuleFile : CI.getFrontendOpts().ModuleFiles)
|
|
if (!CI.loadModuleFile(ModuleFile))
|
|
goto failure;
|
|
|
|
// 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()) {
|
|
IntrusiveRefCntPtr<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 (HasBegunSourceFile)
|
|
CI.getDiagnosticClient().EndSourceFile();
|
|
CI.clearOutputFiles(/*EraseFiles=*/true);
|
|
CI.getLangOpts().setCompilingModule(LangOptions::CMK_None);
|
|
setCurrentInput(FrontendInputFile());
|
|
setCompilerInstance(nullptr);
|
|
return false;
|
|
}
|
|
|
|
llvm::Error FrontendAction::Execute() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
|
|
if (CI.hasFrontendTimer()) {
|
|
llvm::TimeRegion Timer(CI.getFrontendTimer());
|
|
ExecuteAction();
|
|
}
|
|
else ExecuteAction();
|
|
|
|
// If we are supposed to rebuild the global module index, do so now unless
|
|
// there were any module-build failures.
|
|
if (CI.shouldBuildGlobalModuleIndex() && CI.hasFileManager() &&
|
|
CI.hasPreprocessor()) {
|
|
StringRef Cache =
|
|
CI.getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
|
|
if (!Cache.empty()) {
|
|
if (llvm::Error Err = GlobalModuleIndex::writeIndex(
|
|
CI.getFileManager(), CI.getPCHContainerReader(), Cache)) {
|
|
// FIXME this drops the error on the floor, but
|
|
// Index/pch-from-libclang.c seems to rely on dropping at least some of
|
|
// the error conditions!
|
|
consumeError(std::move(Err));
|
|
}
|
|
}
|
|
}
|
|
|
|
return llvm::Error::success();
|
|
}
|
|
|
|
void FrontendAction::EndSourceFile() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
|
|
// Inform the diagnostic client we are done with this source file.
|
|
CI.getDiagnosticClient().EndSourceFile();
|
|
|
|
// Inform the preprocessor we are done.
|
|
if (CI.hasPreprocessor())
|
|
CI.getPreprocessor().EndSourceFile();
|
|
|
|
// Finalize the action.
|
|
EndSourceFileAction();
|
|
|
|
// Sema references the ast consumer, so reset sema first.
|
|
//
|
|
// FIXME: There is more per-file stuff we could just drop here?
|
|
bool DisableFree = CI.getFrontendOpts().DisableFree;
|
|
if (DisableFree) {
|
|
CI.resetAndLeakSema();
|
|
CI.resetAndLeakASTContext();
|
|
llvm::BuryPointer(CI.takeASTConsumer().get());
|
|
} else {
|
|
CI.setSema(nullptr);
|
|
CI.setASTContext(nullptr);
|
|
CI.setASTConsumer(nullptr);
|
|
}
|
|
|
|
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 instructed by the
|
|
// FrontendAction.
|
|
CI.clearOutputFiles(/*EraseFiles=*/shouldEraseOutputFiles());
|
|
|
|
if (isCurrentFileAST()) {
|
|
if (DisableFree) {
|
|
CI.resetAndLeakPreprocessor();
|
|
CI.resetAndLeakSourceManager();
|
|
CI.resetAndLeakFileManager();
|
|
llvm::BuryPointer(std::move(CurrentASTUnit));
|
|
} else {
|
|
CI.setPreprocessor(nullptr);
|
|
CI.setSourceManager(nullptr);
|
|
CI.setFileManager(nullptr);
|
|
}
|
|
}
|
|
|
|
setCompilerInstance(nullptr);
|
|
setCurrentInput(FrontendInputFile());
|
|
CI.getLangOpts().setCompilingModule(LangOptions::CMK_None);
|
|
}
|
|
|
|
bool FrontendAction::shouldEraseOutputFiles() {
|
|
return getCompilerInstance().getDiagnostics().hasErrorOccurred();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Utility Actions
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void ASTFrontendAction::ExecuteAction() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
if (!CI.hasPreprocessor())
|
|
return;
|
|
|
|
// 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 = nullptr;
|
|
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() { }
|
|
|
|
std::unique_ptr<ASTConsumer>
|
|
PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI,
|
|
StringRef InFile) {
|
|
llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
|
|
}
|
|
|
|
bool WrapperFrontendAction::PrepareToExecuteAction(CompilerInstance &CI) {
|
|
return WrappedAction->PrepareToExecuteAction(CI);
|
|
}
|
|
std::unique_ptr<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) {
|
|
WrappedAction->setCurrentInput(getCurrentInput());
|
|
WrappedAction->setCompilerInstance(&CI);
|
|
auto Ret = WrappedAction->BeginSourceFileAction(CI);
|
|
// BeginSourceFileAction may change CurrentInput, e.g. during module builds.
|
|
setCurrentInput(WrappedAction->getCurrentInput());
|
|
return Ret;
|
|
}
|
|
void WrapperFrontendAction::ExecuteAction() {
|
|
WrappedAction->ExecuteAction();
|
|
}
|
|
void WrapperFrontendAction::EndSourceFileAction() {
|
|
WrappedAction->EndSourceFileAction();
|
|
}
|
|
bool WrapperFrontendAction::shouldEraseOutputFiles() {
|
|
return WrappedAction->shouldEraseOutputFiles();
|
|
}
|
|
|
|
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(
|
|
std::unique_ptr<FrontendAction> WrappedAction)
|
|
: WrappedAction(std::move(WrappedAction)) {}
|
|
|