| //===--- 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/ASTUnit.h" |
| #include "clang/Frontend/CompilerInstance.h" |
| #include "clang/Frontend/FrontendDiagnostic.h" |
| #include "clang/Frontend/Utils.h" |
| #include "clang/Lex/HeaderSearch.h" |
| #include "clang/Lex/Pragma.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Parse/Parser.h" |
| #include "clang/Serialization/ASTReader.h" |
| #include "clang/Serialization/ASTWriter.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <memory> |
| #include <system_error> |
| |
| using namespace clang; |
| |
| //===----------------------------------------------------------------------===// |
| // Custom Actions |
| //===----------------------------------------------------------------------===// |
| |
| ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return new ASTConsumer(); |
| } |
| |
| void InitOnlyAction::ExecuteAction() { |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // AST Consumer Actions |
| //===----------------------------------------------------------------------===// |
| |
| ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile)) |
| return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter); |
| return nullptr; |
| } |
| |
| ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter, |
| CI.getFrontendOpts().ASTDumpLookups); |
| } |
| |
| ASTConsumer *ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return CreateASTDeclNodeLister(); |
| } |
| |
| ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return CreateASTViewer(); |
| } |
| |
| ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return CreateDeclContextPrinter(); |
| } |
| |
| ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| std::string Sysroot; |
| std::string OutputFile; |
| raw_ostream *OS = nullptr; |
| if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS)) |
| return nullptr; |
| |
| if (!CI.getFrontendOpts().RelocatablePCH) |
| Sysroot.clear(); |
| return new PCHGenerator(CI.getPreprocessor(), OutputFile, nullptr, Sysroot, |
| OS); |
| } |
| |
| bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI, |
| StringRef InFile, |
| std::string &Sysroot, |
| std::string &OutputFile, |
| raw_ostream *&OS) { |
| Sysroot = CI.getHeaderSearchOpts().Sysroot; |
| if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) { |
| CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot); |
| return true; |
| } |
| |
| // 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. |
| OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true, |
| /*RemoveFileOnSignal=*/false, InFile, |
| /*Extension=*/"", /*useTemporary=*/true); |
| if (!OS) |
| return true; |
| |
| OutputFile = CI.getFrontendOpts().OutputFile; |
| return false; |
| } |
| |
| ASTConsumer *GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| std::string Sysroot; |
| std::string OutputFile; |
| raw_ostream *OS = nullptr; |
| if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS)) |
| return nullptr; |
| |
| return new PCHGenerator(CI.getPreprocessor(), OutputFile, Module, |
| Sysroot, OS); |
| } |
| |
| static SmallVectorImpl<char> & |
| operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) { |
| Includes.append(RHS.begin(), RHS.end()); |
| return Includes; |
| } |
| |
| static std::error_code addHeaderInclude(StringRef HeaderName, |
| SmallVectorImpl<char> &Includes, |
| const LangOptions &LangOpts, |
| bool IsExternC) { |
| if (IsExternC && LangOpts.CPlusPlus) |
| Includes += "extern \"C\" {\n"; |
| if (LangOpts.ObjC1) |
| Includes += "#import \""; |
| else |
| Includes += "#include \""; |
| // Use an absolute path for the include; there's no reason to think that |
| // a relative path will work (. might not be on our include path) or that |
| // it will find the same file. |
| if (llvm::sys::path::is_absolute(HeaderName)) { |
| Includes += HeaderName; |
| } else { |
| SmallString<256> Header = HeaderName; |
| if (std::error_code Err = llvm::sys::fs::make_absolute(Header)) |
| return Err; |
| Includes += Header; |
| } |
| Includes += "\"\n"; |
| if (IsExternC && LangOpts.CPlusPlus) |
| Includes += "}\n"; |
| return std::error_code(); |
| } |
| |
| static std::error_code addHeaderInclude(const FileEntry *Header, |
| SmallVectorImpl<char> &Includes, |
| const LangOptions &LangOpts, |
| bool IsExternC) { |
| return addHeaderInclude(Header->getName(), Includes, LangOpts, IsExternC); |
| } |
| |
| /// \brief Collect the set of header includes needed to construct the given |
| /// module and update the TopHeaders file set of the module. |
| /// |
| /// \param Module The module we're collecting includes from. |
| /// |
| /// \param Includes Will be augmented with the set of \#includes or \#imports |
| /// needed to load all of the named headers. |
| static std::error_code |
| collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr, |
| ModuleMap &ModMap, clang::Module *Module, |
| SmallVectorImpl<char> &Includes) { |
| // Don't collect any headers for unavailable modules. |
| if (!Module->isAvailable()) |
| return std::error_code(); |
| |
| // Add includes for each of these headers. |
| for (unsigned I = 0, N = Module->NormalHeaders.size(); I != N; ++I) { |
| const FileEntry *Header = Module->NormalHeaders[I]; |
| Module->addTopHeader(Header); |
| if (std::error_code Err = |
| addHeaderInclude(Header, Includes, LangOpts, Module->IsExternC)) |
| return Err; |
| } |
| // Note that Module->PrivateHeaders will not be a TopHeader. |
| |
| if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) { |
| Module->addTopHeader(UmbrellaHeader); |
| if (Module->Parent) { |
| // Include the umbrella header for submodules. |
| if (std::error_code Err = addHeaderInclude(UmbrellaHeader, Includes, |
| LangOpts, Module->IsExternC)) |
| return Err; |
| } |
| } else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) { |
| // Add all of the headers we find in this subdirectory. |
| std::error_code EC; |
| SmallString<128> DirNative; |
| llvm::sys::path::native(UmbrellaDir->getName(), DirNative); |
| for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative.str(), EC), |
| DirEnd; |
| Dir != DirEnd && !EC; Dir.increment(EC)) { |
| // Check whether this entry has an extension typically associated with |
| // headers. |
| if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path())) |
| .Cases(".h", ".H", ".hh", ".hpp", true) |
| .Default(false)) |
| continue; |
| |
| // If this header is marked 'unavailable' in this module, don't include |
| // it. |
| if (const FileEntry *Header = FileMgr.getFile(Dir->path())) { |
| if (ModMap.isHeaderUnavailableInModule(Header, Module)) |
| continue; |
| Module->addTopHeader(Header); |
| } |
| |
| // Include this header as part of the umbrella directory. |
| if (std::error_code Err = addHeaderInclude(Dir->path(), Includes, |
| LangOpts, Module->IsExternC)) |
| return Err; |
| } |
| |
| if (EC) |
| return EC; |
| } |
| |
| // Recurse into submodules. |
| for (clang::Module::submodule_iterator Sub = Module->submodule_begin(), |
| SubEnd = Module->submodule_end(); |
| Sub != SubEnd; ++Sub) |
| if (std::error_code Err = collectModuleHeaderIncludes( |
| LangOpts, FileMgr, ModMap, *Sub, Includes)) |
| return Err; |
| |
| return std::error_code(); |
| } |
| |
| bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI, |
| StringRef Filename) { |
| // Find the module map file. |
| const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename); |
| if (!ModuleMap) { |
| CI.getDiagnostics().Report(diag::err_module_map_not_found) |
| << Filename; |
| return false; |
| } |
| |
| // Parse the module map file. |
| HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo(); |
| if (HS.loadModuleMapFile(ModuleMap, IsSystem)) |
| return false; |
| |
| if (CI.getLangOpts().CurrentModule.empty()) { |
| CI.getDiagnostics().Report(diag::err_missing_module_name); |
| |
| // FIXME: Eventually, we could consider asking whether there was just |
| // a single module described in the module map, and use that as a |
| // default. Then it would be fairly trivial to just "compile" a module |
| // map with a single module (the common case). |
| return false; |
| } |
| |
| // 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)); |
| |
| // Dig out the module definition. |
| Module = HS.lookupModule(CI.getLangOpts().CurrentModule, |
| /*AllowSearch=*/false); |
| if (!Module) { |
| CI.getDiagnostics().Report(diag::err_missing_module) |
| << CI.getLangOpts().CurrentModule << Filename; |
| |
| return false; |
| } |
| |
| // Check whether we can build this module at all. |
| clang::Module::Requirement Requirement; |
| clang::Module::HeaderDirective MissingHeader; |
| if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement, |
| MissingHeader)) { |
| if (MissingHeader.FileNameLoc.isValid()) { |
| CI.getDiagnostics().Report(MissingHeader.FileNameLoc, |
| diag::err_module_header_missing) |
| << MissingHeader.IsUmbrella << MissingHeader.FileName; |
| } else { |
| CI.getDiagnostics().Report(diag::err_module_unavailable) |
| << Module->getFullModuleName() |
| << Requirement.second << Requirement.first; |
| } |
| |
| return false; |
| } |
| |
| if (!ModuleMapForUniquing) |
| ModuleMapForUniquing = ModuleMap; |
| Module->ModuleMap = ModuleMapForUniquing; |
| assert(Module->ModuleMap && "missing module map file"); |
| |
| 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 (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) |
| Err = addHeaderInclude(UmbrellaHeader, HeaderContents, CI.getLangOpts(), |
| Module->IsExternC); |
| if (!Err) |
| Err = collectModuleHeaderIncludes( |
| CI.getLangOpts(), FileMgr, |
| CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), Module, |
| HeaderContents); |
| |
| if (Err) { |
| CI.getDiagnostics().Report(diag::err_module_cannot_create_includes) |
| << Module->getFullModuleName() << Err.message(); |
| return false; |
| } |
| |
| llvm::MemoryBuffer *InputBuffer = |
| llvm::MemoryBuffer::getMemBufferCopy(HeaderContents, |
| Module::getModuleInputBufferName()); |
| // Ownership of InputBuffer will be transferred to the SourceManager. |
| setCurrentInput(FrontendInputFile(InputBuffer, getCurrentFileKind(), |
| Module->IsSystem)); |
| return true; |
| } |
| |
| bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI, |
| StringRef InFile, |
| std::string &Sysroot, |
| std::string &OutputFile, |
| raw_ostream *&OS) { |
| // If no output file was provided, figure out where this module would go |
| // in the module cache. |
| if (CI.getFrontendOpts().OutputFile.empty()) { |
| HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo(); |
| CI.getFrontendOpts().OutputFile = |
| HS.getModuleFileName(CI.getLangOpts().CurrentModule, |
| ModuleMapForUniquing->getName()); |
| } |
| |
| // 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. |
| OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true, |
| /*RemoveFileOnSignal=*/false, InFile, |
| /*Extension=*/"", /*useTemporary=*/true, |
| /*CreateMissingDirectories=*/true); |
| if (!OS) |
| return true; |
| |
| OutputFile = CI.getFrontendOpts().OutputFile; |
| return false; |
| } |
| |
| ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return new ASTConsumer(); |
| } |
| |
| ASTConsumer *DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return new ASTConsumer(); |
| } |
| |
| ASTConsumer *VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, |
| StringRef InFile) { |
| return new 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(), |
| 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) 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" |
| return false; |
| } |
| |
| bool ReadTargetOptions(const TargetOptions &TargetOpts, |
| bool Complain) 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; |
| } |
| |
| virtual 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) << "Warning options:\n"; |
| for (const std::string &Warning : DiagOpts->Warnings) { |
| Out.indent(6) << "-W" << Warning << "\n"; |
| } |
| |
| return false; |
| } |
| |
| bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts, |
| bool Complain) override { |
| Out.indent(2) << "Header search options:\n"; |
| Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\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; |
| } |
| #undef DUMP_BOOLEAN |
| }; |
| } |
| |
| 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::string ErrorInfo; |
| OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str().c_str(), |
| ErrorInfo, llvm::sys::fs::F_Text)); |
| } |
| llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs(); |
| |
| Out << "Information for module file '" << getCurrentFile() << "':\n"; |
| DumpModuleInfoListener Listener(Out); |
| ASTReader::readASTFileControlBlock(getCurrentFile(), |
| getCompilerInstance().getFileManager(), |
| Listener); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // 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(); |
| if (CI.getFrontendOpts().OutputFile.empty() || |
| CI.getFrontendOpts().OutputFile == "-") { |
| // FIXME: Don't fail this way. |
| // FIXME: Verify that we can actually seek in the given file. |
| llvm::report_fatal_error("PTH requires a seekable file for output!"); |
| } |
| llvm::raw_fd_ostream *OS = |
| CI.createDefaultOutputFile(true, getCurrentFile()); |
| if (!OS) return; |
| |
| CacheTokens(CI.getPreprocessor(), OS); |
| } |
| |
| 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; |
| } |
| } |
| |
| raw_ostream *OS = CI.createDefaultOutputFile(BinaryMode, getCurrentFile()); |
| if (!OS) return; |
| |
| DoPrintPreprocessedInput(CI.getPreprocessor(), OS, |
| CI.getPreprocessorOutputOpts()); |
| } |
| |
| void PrintPreambleAction::ExecuteAction() { |
| switch (getCurrentFileKind()) { |
| case IK_C: |
| case IK_CXX: |
| case IK_ObjC: |
| case IK_ObjCXX: |
| case IK_OpenCL: |
| case IK_CUDA: |
| break; |
| |
| case IK_None: |
| case IK_Asm: |
| case IK_PreprocessedC: |
| case IK_PreprocessedCXX: |
| case IK_PreprocessedObjC: |
| case IK_PreprocessedObjCXX: |
| case IK_AST: |
| case IK_LLVM_IR: |
| // We can't do anything with these. |
| return; |
| } |
| |
| CompilerInstance &CI = getCompilerInstance(); |
| llvm::MemoryBuffer *Buffer |
| = CI.getFileManager().getBufferForFile(getCurrentFile()); |
| if (Buffer) { |
| unsigned Preamble = Lexer::ComputePreamble(Buffer, CI.getLangOpts()).first; |
| llvm::outs().write(Buffer->getBufferStart(), Preamble); |
| delete Buffer; |
| } |
| } |