diff options
Diffstat (limited to 'contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp | 603 |
1 files changed, 603 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp new file mode 100644 index 000000000000..ffa5b410d2d8 --- /dev/null +++ b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp @@ -0,0 +1,603 @@ +//===--- FrontendActions.cpp ----------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "clang/Frontend/FrontendActions.h" +#include "clang/AST/ASTConsumer.h" +#include "clang/Basic/FileManager.h" +#include "clang/Frontend/ASTConsumers.h" +#include "clang/Frontend/CompilerInstance.h" +#include "clang/Frontend/FrontendDiagnostic.h" +#include "clang/Frontend/MultiplexConsumer.h" +#include "clang/Frontend/Utils.h" +#include "clang/Lex/HeaderSearch.h" +#include "clang/Lex/Preprocessor.h" +#include "clang/Lex/PreprocessorOptions.h" +#include "clang/Serialization/ASTReader.h" +#include "clang/Serialization/ASTWriter.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/raw_ostream.h" +#include <memory> +#include <system_error> + +using namespace clang; + +//===----------------------------------------------------------------------===// +// Custom Actions +//===----------------------------------------------------------------------===// + +std::unique_ptr<ASTConsumer> +InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + return llvm::make_unique<ASTConsumer>(); +} + +void InitOnlyAction::ExecuteAction() { +} + +//===----------------------------------------------------------------------===// +// AST Consumer Actions +//===----------------------------------------------------------------------===// + +std::unique_ptr<ASTConsumer> +ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + if (std::unique_ptr<raw_ostream> OS = + CI.createDefaultOutputFile(false, InFile)) + return CreateASTPrinter(std::move(OS), CI.getFrontendOpts().ASTDumpFilter); + return nullptr; +} + +std::unique_ptr<ASTConsumer> +ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter, + CI.getFrontendOpts().ASTDumpDecls, + CI.getFrontendOpts().ASTDumpAll, + CI.getFrontendOpts().ASTDumpLookups); +} + +std::unique_ptr<ASTConsumer> +ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + return CreateASTDeclNodeLister(); +} + +std::unique_ptr<ASTConsumer> +ASTViewAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + return CreateASTViewer(); +} + +std::unique_ptr<ASTConsumer> +DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI, + StringRef InFile) { + return CreateDeclContextPrinter(); +} + +std::unique_ptr<ASTConsumer> +GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + std::string Sysroot; + if (!ComputeASTConsumerArguments(CI, /*ref*/ Sysroot)) + return nullptr; + + std::string OutputFile; + std::unique_ptr<raw_pwrite_stream> OS = + CreateOutputFile(CI, InFile, /*ref*/ OutputFile); + if (!OS) + return nullptr; + + if (!CI.getFrontendOpts().RelocatablePCH) + Sysroot.clear(); + + auto Buffer = std::make_shared<PCHBuffer>(); + std::vector<std::unique_ptr<ASTConsumer>> Consumers; + Consumers.push_back(llvm::make_unique<PCHGenerator>( + CI.getPreprocessor(), OutputFile, Sysroot, + Buffer, CI.getFrontendOpts().ModuleFileExtensions, + /*AllowASTWithErrors*/CI.getPreprocessorOpts().AllowPCHWithCompilerErrors, + /*IncludeTimestamps*/ + +CI.getFrontendOpts().IncludeTimestamps)); + Consumers.push_back(CI.getPCHContainerWriter().CreatePCHContainerGenerator( + CI, InFile, OutputFile, std::move(OS), Buffer)); + + return llvm::make_unique<MultiplexConsumer>(std::move(Consumers)); +} + +bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI, + std::string &Sysroot) { + Sysroot = CI.getHeaderSearchOpts().Sysroot; + if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) { + CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot); + return false; + } + + return true; +} + +std::unique_ptr<llvm::raw_pwrite_stream> +GeneratePCHAction::CreateOutputFile(CompilerInstance &CI, StringRef InFile, + std::string &OutputFile) { + // We use createOutputFile here because this is exposed via libclang, and we + // must disable the RemoveFileOnSignal behavior. + // We use a temporary to avoid race conditions. + std::unique_ptr<raw_pwrite_stream> OS = + CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true, + /*RemoveFileOnSignal=*/false, InFile, + /*Extension=*/"", /*useTemporary=*/true); + if (!OS) + return nullptr; + + OutputFile = CI.getFrontendOpts().OutputFile; + return OS; +} + +bool GeneratePCHAction::shouldEraseOutputFiles() { + if (getCompilerInstance().getPreprocessorOpts().AllowPCHWithCompilerErrors) + return false; + return ASTFrontendAction::shouldEraseOutputFiles(); +} + +bool GeneratePCHAction::BeginSourceFileAction(CompilerInstance &CI) { + CI.getLangOpts().CompilingPCH = true; + return true; +} + +std::unique_ptr<ASTConsumer> +GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI, + StringRef InFile) { + std::unique_ptr<raw_pwrite_stream> OS = CreateOutputFile(CI, InFile); + if (!OS) + return nullptr; + + std::string OutputFile = CI.getFrontendOpts().OutputFile; + std::string Sysroot; + + auto Buffer = std::make_shared<PCHBuffer>(); + std::vector<std::unique_ptr<ASTConsumer>> Consumers; + + Consumers.push_back(llvm::make_unique<PCHGenerator>( + CI.getPreprocessor(), OutputFile, Sysroot, + Buffer, CI.getFrontendOpts().ModuleFileExtensions, + /*AllowASTWithErrors=*/false, + /*IncludeTimestamps=*/ + +CI.getFrontendOpts().BuildingImplicitModule)); + Consumers.push_back(CI.getPCHContainerWriter().CreatePCHContainerGenerator( + CI, InFile, OutputFile, std::move(OS), Buffer)); + return llvm::make_unique<MultiplexConsumer>(std::move(Consumers)); +} + +bool GenerateModuleFromModuleMapAction::BeginSourceFileAction( + CompilerInstance &CI) { + if (!CI.getLangOpts().Modules) { + CI.getDiagnostics().Report(diag::err_module_build_requires_fmodules); + return false; + } + + return GenerateModuleAction::BeginSourceFileAction(CI); +} + +std::unique_ptr<raw_pwrite_stream> +GenerateModuleFromModuleMapAction::CreateOutputFile(CompilerInstance &CI, + StringRef InFile) { + // If no output file was provided, figure out where this module would go + // in the module cache. + if (CI.getFrontendOpts().OutputFile.empty()) { + StringRef ModuleMapFile = CI.getFrontendOpts().OriginalModuleMap; + if (ModuleMapFile.empty()) + ModuleMapFile = InFile; + + HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo(); + CI.getFrontendOpts().OutputFile = + HS.getCachedModuleFileName(CI.getLangOpts().CurrentModule, + ModuleMapFile); + } + + // We use createOutputFile here because this is exposed via libclang, and we + // must disable the RemoveFileOnSignal behavior. + // We use a temporary to avoid race conditions. + return CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true, + /*RemoveFileOnSignal=*/false, InFile, + /*Extension=*/"", /*useTemporary=*/true, + /*CreateMissingDirectories=*/true); +} + +bool GenerateModuleInterfaceAction::BeginSourceFileAction( + CompilerInstance &CI) { + if (!CI.getLangOpts().ModulesTS) { + CI.getDiagnostics().Report(diag::err_module_interface_requires_modules_ts); + return false; + } + + CI.getLangOpts().setCompilingModule(LangOptions::CMK_ModuleInterface); + + return GenerateModuleAction::BeginSourceFileAction(CI); +} + +std::unique_ptr<raw_pwrite_stream> +GenerateModuleInterfaceAction::CreateOutputFile(CompilerInstance &CI, + StringRef InFile) { + return CI.createDefaultOutputFile(/*Binary=*/true, InFile, "pcm"); +} + +SyntaxOnlyAction::~SyntaxOnlyAction() { +} + +std::unique_ptr<ASTConsumer> +SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + return llvm::make_unique<ASTConsumer>(); +} + +std::unique_ptr<ASTConsumer> +DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI, + StringRef InFile) { + return llvm::make_unique<ASTConsumer>(); +} + +std::unique_ptr<ASTConsumer> +VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) { + return llvm::make_unique<ASTConsumer>(); +} + +void VerifyPCHAction::ExecuteAction() { + CompilerInstance &CI = getCompilerInstance(); + bool Preamble = CI.getPreprocessorOpts().PrecompiledPreambleBytes.first != 0; + const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot; + std::unique_ptr<ASTReader> Reader(new ASTReader( + CI.getPreprocessor(), &CI.getASTContext(), CI.getPCHContainerReader(), + CI.getFrontendOpts().ModuleFileExtensions, + Sysroot.empty() ? "" : Sysroot.c_str(), + /*DisableValidation*/ false, + /*AllowPCHWithCompilerErrors*/ false, + /*AllowConfigurationMismatch*/ true, + /*ValidateSystemInputs*/ true)); + + Reader->ReadAST(getCurrentFile(), + Preamble ? serialization::MK_Preamble + : serialization::MK_PCH, + SourceLocation(), + ASTReader::ARR_ConfigurationMismatch); +} + +namespace { + /// \brief AST reader listener that dumps module information for a module + /// file. + class DumpModuleInfoListener : public ASTReaderListener { + llvm::raw_ostream &Out; + + public: + DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { } + +#define DUMP_BOOLEAN(Value, Text) \ + Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n" + + bool ReadFullVersionInformation(StringRef FullVersion) override { + Out.indent(2) + << "Generated by " + << (FullVersion == getClangFullRepositoryVersion()? "this" + : "a different") + << " Clang: " << FullVersion << "\n"; + return ASTReaderListener::ReadFullVersionInformation(FullVersion); + } + + void ReadModuleName(StringRef ModuleName) override { + Out.indent(2) << "Module name: " << ModuleName << "\n"; + } + void ReadModuleMapFile(StringRef ModuleMapPath) override { + Out.indent(2) << "Module map file: " << ModuleMapPath << "\n"; + } + + bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain, + bool AllowCompatibleDifferences) override { + Out.indent(2) << "Language options:\n"; +#define LANGOPT(Name, Bits, Default, Description) \ + DUMP_BOOLEAN(LangOpts.Name, Description); +#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ + Out.indent(4) << Description << ": " \ + << static_cast<unsigned>(LangOpts.get##Name()) << "\n"; +#define VALUE_LANGOPT(Name, Bits, Default, Description) \ + Out.indent(4) << Description << ": " << LangOpts.Name << "\n"; +#define BENIGN_LANGOPT(Name, Bits, Default, Description) +#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) +#include "clang/Basic/LangOptions.def" + + if (!LangOpts.ModuleFeatures.empty()) { + Out.indent(4) << "Module features:\n"; + for (StringRef Feature : LangOpts.ModuleFeatures) + Out.indent(6) << Feature << "\n"; + } + + return false; + } + + bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain, + bool AllowCompatibleDifferences) override { + Out.indent(2) << "Target options:\n"; + Out.indent(4) << " Triple: " << TargetOpts.Triple << "\n"; + Out.indent(4) << " CPU: " << TargetOpts.CPU << "\n"; + Out.indent(4) << " ABI: " << TargetOpts.ABI << "\n"; + + if (!TargetOpts.FeaturesAsWritten.empty()) { + Out.indent(4) << "Target features:\n"; + for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size(); + I != N; ++I) { + Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n"; + } + } + + return false; + } + + bool ReadDiagnosticOptions(IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, + bool Complain) override { + Out.indent(2) << "Diagnostic options:\n"; +#define DIAGOPT(Name, Bits, Default) DUMP_BOOLEAN(DiagOpts->Name, #Name); +#define ENUM_DIAGOPT(Name, Type, Bits, Default) \ + Out.indent(4) << #Name << ": " << DiagOpts->get##Name() << "\n"; +#define VALUE_DIAGOPT(Name, Bits, Default) \ + Out.indent(4) << #Name << ": " << DiagOpts->Name << "\n"; +#include "clang/Basic/DiagnosticOptions.def" + + Out.indent(4) << "Diagnostic flags:\n"; + for (const std::string &Warning : DiagOpts->Warnings) + Out.indent(6) << "-W" << Warning << "\n"; + for (const std::string &Remark : DiagOpts->Remarks) + Out.indent(6) << "-R" << Remark << "\n"; + + return false; + } + + bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts, + StringRef SpecificModuleCachePath, + bool Complain) override { + Out.indent(2) << "Header search options:\n"; + Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n"; + Out.indent(4) << "Resource dir [ -resource-dir=]: '" << HSOpts.ResourceDir << "'\n"; + Out.indent(4) << "Module Cache: '" << SpecificModuleCachePath << "'\n"; + DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes, + "Use builtin include directories [-nobuiltininc]"); + DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes, + "Use standard system include directories [-nostdinc]"); + DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes, + "Use standard C++ include directories [-nostdinc++]"); + DUMP_BOOLEAN(HSOpts.UseLibcxx, + "Use libc++ (rather than libstdc++) [-stdlib=]"); + return false; + } + + bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts, + bool Complain, + std::string &SuggestedPredefines) override { + Out.indent(2) << "Preprocessor options:\n"; + DUMP_BOOLEAN(PPOpts.UsePredefines, + "Uses compiler/target-specific predefines [-undef]"); + DUMP_BOOLEAN(PPOpts.DetailedRecord, + "Uses detailed preprocessing record (for indexing)"); + + if (!PPOpts.Macros.empty()) { + Out.indent(4) << "Predefined macros:\n"; + } + + for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator + I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end(); + I != IEnd; ++I) { + Out.indent(6); + if (I->second) + Out << "-U"; + else + Out << "-D"; + Out << I->first << "\n"; + } + return false; + } + + /// Indicates that a particular module file extension has been read. + void readModuleFileExtension( + const ModuleFileExtensionMetadata &Metadata) override { + Out.indent(2) << "Module file extension '" + << Metadata.BlockName << "' " << Metadata.MajorVersion + << "." << Metadata.MinorVersion; + if (!Metadata.UserInfo.empty()) { + Out << ": "; + Out.write_escaped(Metadata.UserInfo); + } + + Out << "\n"; + } +#undef DUMP_BOOLEAN + }; +} + +bool DumpModuleInfoAction::BeginInvocation(CompilerInstance &CI) { + // The Object file reader also supports raw ast files and there is no point in + // being strict about the module file format in -module-file-info mode. + CI.getHeaderSearchOpts().ModuleFormat = "obj"; + return true; +} + +void DumpModuleInfoAction::ExecuteAction() { + // Set up the output file. + std::unique_ptr<llvm::raw_fd_ostream> OutFile; + StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile; + if (!OutputFileName.empty() && OutputFileName != "-") { + std::error_code EC; + OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str(), EC, + llvm::sys::fs::F_Text)); + } + llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs(); + + Out << "Information for module file '" << getCurrentFile() << "':\n"; + auto &FileMgr = getCompilerInstance().getFileManager(); + auto Buffer = FileMgr.getBufferForFile(getCurrentFile()); + StringRef Magic = (*Buffer)->getMemBufferRef().getBuffer(); + bool IsRaw = (Magic.size() >= 4 && Magic[0] == 'C' && Magic[1] == 'P' && + Magic[2] == 'C' && Magic[3] == 'H'); + Out << " Module format: " << (IsRaw ? "raw" : "obj") << "\n"; + + Preprocessor &PP = getCompilerInstance().getPreprocessor(); + DumpModuleInfoListener Listener(Out); + HeaderSearchOptions &HSOpts = + PP.getHeaderSearchInfo().getHeaderSearchOpts(); + ASTReader::readASTFileControlBlock( + getCurrentFile(), FileMgr, getCompilerInstance().getPCHContainerReader(), + /*FindModuleFileExtensions=*/true, Listener, + HSOpts.ModulesValidateDiagnosticOptions); +} + +//===----------------------------------------------------------------------===// +// Preprocessor Actions +//===----------------------------------------------------------------------===// + +void DumpRawTokensAction::ExecuteAction() { + Preprocessor &PP = getCompilerInstance().getPreprocessor(); + SourceManager &SM = PP.getSourceManager(); + + // Start lexing the specified input file. + const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID()); + Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts()); + RawLex.SetKeepWhitespaceMode(true); + + Token RawTok; + RawLex.LexFromRawLexer(RawTok); + while (RawTok.isNot(tok::eof)) { + PP.DumpToken(RawTok, true); + llvm::errs() << "\n"; + RawLex.LexFromRawLexer(RawTok); + } +} + +void DumpTokensAction::ExecuteAction() { + Preprocessor &PP = getCompilerInstance().getPreprocessor(); + // Start preprocessing the specified input file. + Token Tok; + PP.EnterMainSourceFile(); + do { + PP.Lex(Tok); + PP.DumpToken(Tok, true); + llvm::errs() << "\n"; + } while (Tok.isNot(tok::eof)); +} + +void GeneratePTHAction::ExecuteAction() { + CompilerInstance &CI = getCompilerInstance(); + std::unique_ptr<raw_pwrite_stream> OS = + CI.createDefaultOutputFile(true, getCurrentFile()); + if (!OS) + return; + + CacheTokens(CI.getPreprocessor(), OS.get()); +} + +void PreprocessOnlyAction::ExecuteAction() { + Preprocessor &PP = getCompilerInstance().getPreprocessor(); + + // Ignore unknown pragmas. + PP.IgnorePragmas(); + + Token Tok; + // Start parsing the specified input file. + PP.EnterMainSourceFile(); + do { + PP.Lex(Tok); + } while (Tok.isNot(tok::eof)); +} + +void PrintPreprocessedAction::ExecuteAction() { + CompilerInstance &CI = getCompilerInstance(); + // Output file may need to be set to 'Binary', to avoid converting Unix style + // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>). + // + // Look to see what type of line endings the file uses. If there's a + // CRLF, then we won't open the file up in binary mode. If there is + // just an LF or CR, then we will open the file up in binary mode. + // In this fashion, the output format should match the input format, unless + // the input format has inconsistent line endings. + // + // This should be a relatively fast operation since most files won't have + // all of their source code on a single line. However, that is still a + // concern, so if we scan for too long, we'll just assume the file should + // be opened in binary mode. + bool BinaryMode = true; + bool InvalidFile = false; + const SourceManager& SM = CI.getSourceManager(); + const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(), + &InvalidFile); + if (!InvalidFile) { + const char *cur = Buffer->getBufferStart(); + const char *end = Buffer->getBufferEnd(); + const char *next = (cur != end) ? cur + 1 : end; + + // Limit ourselves to only scanning 256 characters into the source + // file. This is mostly a sanity check in case the file has no + // newlines whatsoever. + if (end - cur > 256) end = cur + 256; + + while (next < end) { + if (*cur == 0x0D) { // CR + if (*next == 0x0A) // CRLF + BinaryMode = false; + + break; + } else if (*cur == 0x0A) // LF + break; + + ++cur; + ++next; + } + } + + std::unique_ptr<raw_ostream> OS = + CI.createDefaultOutputFile(BinaryMode, getCurrentFile()); + if (!OS) return; + + // If we're preprocessing a module map, start by dumping the contents of the + // module itself before switching to the input buffer. + auto &Input = getCurrentInput(); + if (Input.getKind().getFormat() == InputKind::ModuleMap) { + if (Input.isFile()) { + (*OS) << "# 1 \""; + OS->write_escaped(Input.getFile()); + (*OS) << "\"\n"; + } + // FIXME: Include additional information here so that we don't need the + // original source files to exist on disk. + getCurrentModule()->print(*OS); + (*OS) << "#pragma clang module contents\n"; + } + + DoPrintPreprocessedInput(CI.getPreprocessor(), OS.get(), + CI.getPreprocessorOutputOpts()); +} + +void PrintPreambleAction::ExecuteAction() { + switch (getCurrentFileKind().getLanguage()) { + case InputKind::C: + case InputKind::CXX: + case InputKind::ObjC: + case InputKind::ObjCXX: + case InputKind::OpenCL: + case InputKind::CUDA: + break; + + case InputKind::Unknown: + case InputKind::Asm: + case InputKind::LLVM_IR: + case InputKind::RenderScript: + // We can't do anything with these. + return; + } + + // We don't expect to find any #include directives in a preprocessed input. + if (getCurrentFileKind().isPreprocessed()) + return; + + CompilerInstance &CI = getCompilerInstance(); + auto Buffer = CI.getFileManager().getBufferForFile(getCurrentFile()); + if (Buffer) { + unsigned Preamble = + Lexer::ComputePreamble((*Buffer)->getBuffer(), CI.getLangOpts()).Size; + llvm::outs().write((*Buffer)->getBufferStart(), Preamble); + } +} |