1 //===--- FrontendActions.cpp ----------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Frontend/FrontendActions.h"
11 #include "clang/AST/ASTConsumer.h"
12 #include "clang/Basic/FileManager.h"
13 #include "clang/Frontend/ASTConsumers.h"
14 #include "clang/Frontend/ASTUnit.h"
15 #include "clang/Frontend/CompilerInstance.h"
16 #include "clang/Frontend/FrontendDiagnostic.h"
17 #include "clang/Frontend/MultiplexConsumer.h"
18 #include "clang/Frontend/Utils.h"
19 #include "clang/Lex/HeaderSearch.h"
20 #include "clang/Lex/Pragma.h"
21 #include "clang/Lex/Preprocessor.h"
22 #include "clang/Parse/Parser.h"
23 #include "clang/Serialization/ASTReader.h"
24 #include "clang/Serialization/ASTWriter.h"
25 #include "llvm/Support/FileSystem.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include "llvm/Support/raw_ostream.h"
29 #include <system_error>
31 using namespace clang;
33 //===----------------------------------------------------------------------===//
35 //===----------------------------------------------------------------------===//
37 std::unique_ptr<ASTConsumer>
38 InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
39 return llvm::make_unique<ASTConsumer>();
42 void InitOnlyAction::ExecuteAction() {
45 //===----------------------------------------------------------------------===//
46 // AST Consumer Actions
47 //===----------------------------------------------------------------------===//
49 std::unique_ptr<ASTConsumer>
50 ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
51 if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
52 return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
56 std::unique_ptr<ASTConsumer>
57 ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
58 return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
59 CI.getFrontendOpts().ASTDumpDecls,
60 CI.getFrontendOpts().ASTDumpLookups);
63 std::unique_ptr<ASTConsumer>
64 ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
65 return CreateASTDeclNodeLister();
68 std::unique_ptr<ASTConsumer>
69 ASTViewAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
70 return CreateASTViewer();
73 std::unique_ptr<ASTConsumer>
74 DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
76 return CreateDeclContextPrinter();
79 std::unique_ptr<ASTConsumer>
80 GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
82 std::string OutputFile;
83 raw_pwrite_stream *OS =
84 ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile);
88 if (!CI.getFrontendOpts().RelocatablePCH)
91 auto Buffer = std::make_shared<PCHBuffer>();
92 std::vector<std::unique_ptr<ASTConsumer>> Consumers;
93 Consumers.push_back(llvm::make_unique<PCHGenerator>(
94 CI.getPreprocessor(), OutputFile, nullptr, Sysroot,
95 Buffer, CI.getFrontendOpts().ModuleFileExtensions));
96 Consumers.push_back(CI.getPCHContainerWriter().CreatePCHContainerGenerator(
97 CI, InFile, OutputFile, OS, Buffer));
99 return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
102 raw_pwrite_stream *GeneratePCHAction::ComputeASTConsumerArguments(
103 CompilerInstance &CI, StringRef InFile, std::string &Sysroot,
104 std::string &OutputFile) {
105 Sysroot = CI.getHeaderSearchOpts().Sysroot;
106 if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
107 CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
111 // We use createOutputFile here because this is exposed via libclang, and we
112 // must disable the RemoveFileOnSignal behavior.
113 // We use a temporary to avoid race conditions.
114 raw_pwrite_stream *OS =
115 CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
116 /*RemoveFileOnSignal=*/false, InFile,
117 /*Extension=*/"", /*useTemporary=*/true);
121 OutputFile = CI.getFrontendOpts().OutputFile;
125 std::unique_ptr<ASTConsumer>
126 GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
129 std::string OutputFile;
130 raw_pwrite_stream *OS =
131 ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile);
135 auto Buffer = std::make_shared<PCHBuffer>();
136 std::vector<std::unique_ptr<ASTConsumer>> Consumers;
138 Consumers.push_back(llvm::make_unique<PCHGenerator>(
139 CI.getPreprocessor(), OutputFile, Module, Sysroot,
140 Buffer, CI.getFrontendOpts().ModuleFileExtensions,
141 /*AllowASTWithErrors=*/false,
142 /*IncludeTimestamps=*/
143 +CI.getFrontendOpts().BuildingImplicitModule));
144 Consumers.push_back(CI.getPCHContainerWriter().CreatePCHContainerGenerator(
145 CI, InFile, OutputFile, OS, Buffer));
146 return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
149 static SmallVectorImpl<char> &
150 operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
151 Includes.append(RHS.begin(), RHS.end());
155 static std::error_code addHeaderInclude(StringRef HeaderName,
156 SmallVectorImpl<char> &Includes,
157 const LangOptions &LangOpts,
159 if (IsExternC && LangOpts.CPlusPlus)
160 Includes += "extern \"C\" {\n";
162 Includes += "#import \"";
164 Includes += "#include \"";
166 Includes += HeaderName;
169 if (IsExternC && LangOpts.CPlusPlus)
171 return std::error_code();
174 /// \brief Collect the set of header includes needed to construct the given
175 /// module and update the TopHeaders file set of the module.
177 /// \param Module The module we're collecting includes from.
179 /// \param Includes Will be augmented with the set of \#includes or \#imports
180 /// needed to load all of the named headers.
181 static std::error_code
182 collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr,
183 ModuleMap &ModMap, clang::Module *Module,
184 SmallVectorImpl<char> &Includes) {
185 // Don't collect any headers for unavailable modules.
186 if (!Module->isAvailable())
187 return std::error_code();
189 // Add includes for each of these headers.
190 for (Module::Header &H : Module->Headers[Module::HK_Normal]) {
191 Module->addTopHeader(H.Entry);
192 // Use the path as specified in the module map file. We'll look for this
193 // file relative to the module build directory (the directory containing
194 // the module map file) so this will find the same file that we found
195 // while parsing the module map.
196 if (std::error_code Err = addHeaderInclude(H.NameAsWritten, Includes,
197 LangOpts, Module->IsExternC))
200 // Note that Module->PrivateHeaders will not be a TopHeader.
202 if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader()) {
203 Module->addTopHeader(UmbrellaHeader.Entry);
204 if (Module->Parent) {
205 // Include the umbrella header for submodules.
206 if (std::error_code Err = addHeaderInclude(UmbrellaHeader.NameAsWritten,
211 } else if (Module::DirectoryName UmbrellaDir = Module->getUmbrellaDir()) {
212 // Add all of the headers we find in this subdirectory.
214 SmallString<128> DirNative;
215 llvm::sys::path::native(UmbrellaDir.Entry->getName(), DirNative);
216 for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative, EC),
218 Dir != DirEnd && !EC; Dir.increment(EC)) {
219 // Check whether this entry has an extension typically associated with
221 if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
222 .Cases(".h", ".H", ".hh", ".hpp", true)
226 const FileEntry *Header = FileMgr.getFile(Dir->path());
227 // FIXME: This shouldn't happen unless there is a file system race. Is
228 // that worth diagnosing?
232 // If this header is marked 'unavailable' in this module, don't include
234 if (ModMap.isHeaderUnavailableInModule(Header, Module))
237 // Compute the relative path from the directory to this file.
238 SmallVector<StringRef, 16> Components;
239 auto PathIt = llvm::sys::path::rbegin(Dir->path());
240 for (int I = 0; I != Dir.level() + 1; ++I, ++PathIt)
241 Components.push_back(*PathIt);
242 SmallString<128> RelativeHeader(UmbrellaDir.NameAsWritten);
243 for (auto It = Components.rbegin(), End = Components.rend(); It != End;
245 llvm::sys::path::append(RelativeHeader, *It);
247 // Include this header as part of the umbrella directory.
248 Module->addTopHeader(Header);
249 if (std::error_code Err = addHeaderInclude(RelativeHeader, Includes,
250 LangOpts, Module->IsExternC))
258 // Recurse into submodules.
259 for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
260 SubEnd = Module->submodule_end();
261 Sub != SubEnd; ++Sub)
262 if (std::error_code Err = collectModuleHeaderIncludes(
263 LangOpts, FileMgr, ModMap, *Sub, Includes))
266 return std::error_code();
269 bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
270 StringRef Filename) {
271 // Find the module map file.
272 const FileEntry *ModuleMap =
273 CI.getFileManager().getFile(Filename, /*openFile*/true);
275 CI.getDiagnostics().Report(diag::err_module_map_not_found)
280 // Set up embedding for any specified files. Do this before we load any
281 // source files, including the primary module map for the compilation.
282 for (const auto &F : CI.getFrontendOpts().ModulesEmbedFiles) {
283 if (const auto *FE = CI.getFileManager().getFile(F, /*openFile*/true))
284 CI.getSourceManager().setFileIsTransient(FE);
286 CI.getDiagnostics().Report(diag::err_modules_embed_file_not_found) << F;
288 if (CI.getFrontendOpts().ModulesEmbedAllFiles)
289 CI.getSourceManager().setAllFilesAreTransient(true);
291 // Parse the module map file.
292 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
293 if (HS.loadModuleMapFile(ModuleMap, IsSystem))
296 if (CI.getLangOpts().CurrentModule.empty()) {
297 CI.getDiagnostics().Report(diag::err_missing_module_name);
299 // FIXME: Eventually, we could consider asking whether there was just
300 // a single module described in the module map, and use that as a
301 // default. Then it would be fairly trivial to just "compile" a module
302 // map with a single module (the common case).
306 // If we're being run from the command-line, the module build stack will not
307 // have been filled in yet, so complete it now in order to allow us to detect
309 SourceManager &SourceMgr = CI.getSourceManager();
310 if (SourceMgr.getModuleBuildStack().empty())
311 SourceMgr.pushModuleBuildStack(CI.getLangOpts().CurrentModule,
312 FullSourceLoc(SourceLocation(), SourceMgr));
314 // Dig out the module definition.
315 Module = HS.lookupModule(CI.getLangOpts().CurrentModule,
316 /*AllowSearch=*/false);
318 CI.getDiagnostics().Report(diag::err_missing_module)
319 << CI.getLangOpts().CurrentModule << Filename;
324 // Check whether we can build this module at all.
325 clang::Module::Requirement Requirement;
326 clang::Module::UnresolvedHeaderDirective MissingHeader;
327 if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement,
329 if (MissingHeader.FileNameLoc.isValid()) {
330 CI.getDiagnostics().Report(MissingHeader.FileNameLoc,
331 diag::err_module_header_missing)
332 << MissingHeader.IsUmbrella << MissingHeader.FileName;
334 CI.getDiagnostics().Report(diag::err_module_unavailable)
335 << Module->getFullModuleName()
336 << Requirement.second << Requirement.first;
342 if (ModuleMapForUniquing && ModuleMapForUniquing != ModuleMap) {
343 Module->IsInferred = true;
344 HS.getModuleMap().setInferredModuleAllowedBy(Module, ModuleMapForUniquing);
346 ModuleMapForUniquing = ModuleMap;
349 FileManager &FileMgr = CI.getFileManager();
351 // Collect the set of #includes we need to build the module.
352 SmallString<256> HeaderContents;
353 std::error_code Err = std::error_code();
354 if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader())
355 Err = addHeaderInclude(UmbrellaHeader.NameAsWritten, HeaderContents,
356 CI.getLangOpts(), Module->IsExternC);
358 Err = collectModuleHeaderIncludes(
359 CI.getLangOpts(), FileMgr,
360 CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), Module,
364 CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
365 << Module->getFullModuleName() << Err.message();
369 // Inform the preprocessor that includes from within the input buffer should
370 // be resolved relative to the build directory of the module map file.
371 CI.getPreprocessor().setMainFileDir(Module->Directory);
373 std::unique_ptr<llvm::MemoryBuffer> InputBuffer =
374 llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
375 Module::getModuleInputBufferName());
376 // Ownership of InputBuffer will be transferred to the SourceManager.
377 setCurrentInput(FrontendInputFile(InputBuffer.release(), getCurrentFileKind(),
382 raw_pwrite_stream *GenerateModuleAction::ComputeASTConsumerArguments(
383 CompilerInstance &CI, StringRef InFile, std::string &Sysroot,
384 std::string &OutputFile) {
385 // If no output file was provided, figure out where this module would go
386 // in the module cache.
387 if (CI.getFrontendOpts().OutputFile.empty()) {
388 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
389 CI.getFrontendOpts().OutputFile =
390 HS.getModuleFileName(CI.getLangOpts().CurrentModule,
391 ModuleMapForUniquing->getName());
394 // We use createOutputFile here because this is exposed via libclang, and we
395 // must disable the RemoveFileOnSignal behavior.
396 // We use a temporary to avoid race conditions.
397 raw_pwrite_stream *OS =
398 CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
399 /*RemoveFileOnSignal=*/false, InFile,
400 /*Extension=*/"", /*useTemporary=*/true,
401 /*CreateMissingDirectories=*/true);
405 OutputFile = CI.getFrontendOpts().OutputFile;
409 std::unique_ptr<ASTConsumer>
410 SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
411 return llvm::make_unique<ASTConsumer>();
414 std::unique_ptr<ASTConsumer>
415 DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
417 return llvm::make_unique<ASTConsumer>();
420 std::unique_ptr<ASTConsumer>
421 VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
422 return llvm::make_unique<ASTConsumer>();
425 void VerifyPCHAction::ExecuteAction() {
426 CompilerInstance &CI = getCompilerInstance();
427 bool Preamble = CI.getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
428 const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
429 std::unique_ptr<ASTReader> Reader(new ASTReader(
430 CI.getPreprocessor(), CI.getASTContext(), CI.getPCHContainerReader(),
431 CI.getFrontendOpts().ModuleFileExtensions,
432 Sysroot.empty() ? "" : Sysroot.c_str(),
433 /*DisableValidation*/ false,
434 /*AllowPCHWithCompilerErrors*/ false,
435 /*AllowConfigurationMismatch*/ true,
436 /*ValidateSystemInputs*/ true));
438 Reader->ReadAST(getCurrentFile(),
439 Preamble ? serialization::MK_Preamble
440 : serialization::MK_PCH,
442 ASTReader::ARR_ConfigurationMismatch);
446 /// \brief AST reader listener that dumps module information for a module
448 class DumpModuleInfoListener : public ASTReaderListener {
449 llvm::raw_ostream &Out;
452 DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { }
454 #define DUMP_BOOLEAN(Value, Text) \
455 Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n"
457 bool ReadFullVersionInformation(StringRef FullVersion) override {
460 << (FullVersion == getClangFullRepositoryVersion()? "this"
462 << " Clang: " << FullVersion << "\n";
463 return ASTReaderListener::ReadFullVersionInformation(FullVersion);
466 void ReadModuleName(StringRef ModuleName) override {
467 Out.indent(2) << "Module name: " << ModuleName << "\n";
469 void ReadModuleMapFile(StringRef ModuleMapPath) override {
470 Out.indent(2) << "Module map file: " << ModuleMapPath << "\n";
473 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
474 bool AllowCompatibleDifferences) override {
475 Out.indent(2) << "Language options:\n";
476 #define LANGOPT(Name, Bits, Default, Description) \
477 DUMP_BOOLEAN(LangOpts.Name, Description);
478 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
479 Out.indent(4) << Description << ": " \
480 << static_cast<unsigned>(LangOpts.get##Name()) << "\n";
481 #define VALUE_LANGOPT(Name, Bits, Default, Description) \
482 Out.indent(4) << Description << ": " << LangOpts.Name << "\n";
483 #define BENIGN_LANGOPT(Name, Bits, Default, Description)
484 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
485 #include "clang/Basic/LangOptions.def"
487 if (!LangOpts.ModuleFeatures.empty()) {
488 Out.indent(4) << "Module features:\n";
489 for (StringRef Feature : LangOpts.ModuleFeatures)
490 Out.indent(6) << Feature << "\n";
496 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
497 bool AllowCompatibleDifferences) override {
498 Out.indent(2) << "Target options:\n";
499 Out.indent(4) << " Triple: " << TargetOpts.Triple << "\n";
500 Out.indent(4) << " CPU: " << TargetOpts.CPU << "\n";
501 Out.indent(4) << " ABI: " << TargetOpts.ABI << "\n";
503 if (!TargetOpts.FeaturesAsWritten.empty()) {
504 Out.indent(4) << "Target features:\n";
505 for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size();
507 Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n";
514 bool ReadDiagnosticOptions(IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts,
515 bool Complain) override {
516 Out.indent(2) << "Diagnostic options:\n";
517 #define DIAGOPT(Name, Bits, Default) DUMP_BOOLEAN(DiagOpts->Name, #Name);
518 #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
519 Out.indent(4) << #Name << ": " << DiagOpts->get##Name() << "\n";
520 #define VALUE_DIAGOPT(Name, Bits, Default) \
521 Out.indent(4) << #Name << ": " << DiagOpts->Name << "\n";
522 #include "clang/Basic/DiagnosticOptions.def"
524 Out.indent(4) << "Diagnostic flags:\n";
525 for (const std::string &Warning : DiagOpts->Warnings)
526 Out.indent(6) << "-W" << Warning << "\n";
527 for (const std::string &Remark : DiagOpts->Remarks)
528 Out.indent(6) << "-R" << Remark << "\n";
533 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
534 StringRef SpecificModuleCachePath,
535 bool Complain) override {
536 Out.indent(2) << "Header search options:\n";
537 Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n";
538 Out.indent(4) << "Module Cache: '" << SpecificModuleCachePath << "'\n";
539 DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes,
540 "Use builtin include directories [-nobuiltininc]");
541 DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes,
542 "Use standard system include directories [-nostdinc]");
543 DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes,
544 "Use standard C++ include directories [-nostdinc++]");
545 DUMP_BOOLEAN(HSOpts.UseLibcxx,
546 "Use libc++ (rather than libstdc++) [-stdlib=]");
550 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
552 std::string &SuggestedPredefines) override {
553 Out.indent(2) << "Preprocessor options:\n";
554 DUMP_BOOLEAN(PPOpts.UsePredefines,
555 "Uses compiler/target-specific predefines [-undef]");
556 DUMP_BOOLEAN(PPOpts.DetailedRecord,
557 "Uses detailed preprocessing record (for indexing)");
559 if (!PPOpts.Macros.empty()) {
560 Out.indent(4) << "Predefined macros:\n";
563 for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
564 I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end();
571 Out << I->first << "\n";
576 /// Indicates that a particular module file extension has been read.
577 void readModuleFileExtension(
578 const ModuleFileExtensionMetadata &Metadata) override {
579 Out.indent(2) << "Module file extension '"
580 << Metadata.BlockName << "' " << Metadata.MajorVersion
581 << "." << Metadata.MinorVersion;
582 if (!Metadata.UserInfo.empty()) {
584 Out.write_escaped(Metadata.UserInfo);
593 void DumpModuleInfoAction::ExecuteAction() {
594 // Set up the output file.
595 std::unique_ptr<llvm::raw_fd_ostream> OutFile;
596 StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
597 if (!OutputFileName.empty() && OutputFileName != "-") {
599 OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str(), EC,
600 llvm::sys::fs::F_Text));
602 llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs();
604 Out << "Information for module file '" << getCurrentFile() << "':\n";
605 DumpModuleInfoListener Listener(Out);
606 ASTReader::readASTFileControlBlock(
607 getCurrentFile(), getCompilerInstance().getFileManager(),
608 getCompilerInstance().getPCHContainerReader(),
609 /*FindModuleFileExtensions=*/true, Listener);
612 //===----------------------------------------------------------------------===//
613 // Preprocessor Actions
614 //===----------------------------------------------------------------------===//
616 void DumpRawTokensAction::ExecuteAction() {
617 Preprocessor &PP = getCompilerInstance().getPreprocessor();
618 SourceManager &SM = PP.getSourceManager();
620 // Start lexing the specified input file.
621 const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
622 Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
623 RawLex.SetKeepWhitespaceMode(true);
626 RawLex.LexFromRawLexer(RawTok);
627 while (RawTok.isNot(tok::eof)) {
628 PP.DumpToken(RawTok, true);
629 llvm::errs() << "\n";
630 RawLex.LexFromRawLexer(RawTok);
634 void DumpTokensAction::ExecuteAction() {
635 Preprocessor &PP = getCompilerInstance().getPreprocessor();
636 // Start preprocessing the specified input file.
638 PP.EnterMainSourceFile();
641 PP.DumpToken(Tok, true);
642 llvm::errs() << "\n";
643 } while (Tok.isNot(tok::eof));
646 void GeneratePTHAction::ExecuteAction() {
647 CompilerInstance &CI = getCompilerInstance();
648 raw_pwrite_stream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
652 CacheTokens(CI.getPreprocessor(), OS);
655 void PreprocessOnlyAction::ExecuteAction() {
656 Preprocessor &PP = getCompilerInstance().getPreprocessor();
658 // Ignore unknown pragmas.
662 // Start parsing the specified input file.
663 PP.EnterMainSourceFile();
666 } while (Tok.isNot(tok::eof));
669 void PrintPreprocessedAction::ExecuteAction() {
670 CompilerInstance &CI = getCompilerInstance();
671 // Output file may need to be set to 'Binary', to avoid converting Unix style
672 // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
674 // Look to see what type of line endings the file uses. If there's a
675 // CRLF, then we won't open the file up in binary mode. If there is
676 // just an LF or CR, then we will open the file up in binary mode.
677 // In this fashion, the output format should match the input format, unless
678 // the input format has inconsistent line endings.
680 // This should be a relatively fast operation since most files won't have
681 // all of their source code on a single line. However, that is still a
682 // concern, so if we scan for too long, we'll just assume the file should
683 // be opened in binary mode.
684 bool BinaryMode = true;
685 bool InvalidFile = false;
686 const SourceManager& SM = CI.getSourceManager();
687 const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(),
690 const char *cur = Buffer->getBufferStart();
691 const char *end = Buffer->getBufferEnd();
692 const char *next = (cur != end) ? cur + 1 : end;
694 // Limit ourselves to only scanning 256 characters into the source
695 // file. This is mostly a sanity check in case the file has no
696 // newlines whatsoever.
697 if (end - cur > 256) end = cur + 256;
700 if (*cur == 0x0D) { // CR
701 if (*next == 0x0A) // CRLF
705 } else if (*cur == 0x0A) // LF
712 raw_ostream *OS = CI.createDefaultOutputFile(BinaryMode, getCurrentFile());
715 DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
716 CI.getPreprocessorOutputOpts());
719 void PrintPreambleAction::ExecuteAction() {
720 switch (getCurrentFileKind()) {
731 case IK_PreprocessedC:
732 case IK_PreprocessedCuda:
733 case IK_PreprocessedCXX:
734 case IK_PreprocessedObjC:
735 case IK_PreprocessedObjCXX:
738 // We can't do anything with these.
742 CompilerInstance &CI = getCompilerInstance();
743 auto Buffer = CI.getFileManager().getBufferForFile(getCurrentFile());
746 Lexer::ComputePreamble((*Buffer)->getBuffer(), CI.getLangOpts()).first;
747 llvm::outs().write((*Buffer)->getBufferStart(), Preamble);