clang  8.0.0svn
FrontendAction.cpp
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1 //===--- FrontendAction.cpp -----------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
11 #include "clang/AST/ASTConsumer.h"
12 #include "clang/AST/ASTContext.h"
13 #include "clang/AST/DeclGroup.h"
14 #include "clang/Frontend/ASTUnit.h"
20 #include "clang/Frontend/Utils.h"
21 #include "clang/Lex/HeaderSearch.h"
23 #include "clang/Lex/Preprocessor.h"
25 #include "clang/Parse/ParseAST.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/FileSystem.h"
31 #include "llvm/Support/Path.h"
32 #include "llvm/Support/Timer.h"
33 #include "llvm/Support/raw_ostream.h"
34 #include <system_error>
35 using namespace clang;
36 
37 LLVM_INSTANTIATE_REGISTRY(FrontendPluginRegistry)
38 
39 namespace {
40 
41 class DelegatingDeserializationListener : public ASTDeserializationListener {
43  bool DeletePrevious;
44 
45 public:
46  explicit DelegatingDeserializationListener(
47  ASTDeserializationListener *Previous, bool DeletePrevious)
48  : Previous(Previous), DeletePrevious(DeletePrevious) {}
49  ~DelegatingDeserializationListener() override {
50  if (DeletePrevious)
51  delete Previous;
52  }
53 
54  void ReaderInitialized(ASTReader *Reader) override {
55  if (Previous)
56  Previous->ReaderInitialized(Reader);
57  }
58  void IdentifierRead(serialization::IdentID ID,
59  IdentifierInfo *II) override {
60  if (Previous)
61  Previous->IdentifierRead(ID, II);
62  }
63  void TypeRead(serialization::TypeIdx Idx, QualType T) override {
64  if (Previous)
65  Previous->TypeRead(Idx, T);
66  }
67  void DeclRead(serialization::DeclID ID, const Decl *D) override {
68  if (Previous)
69  Previous->DeclRead(ID, D);
70  }
71  void SelectorRead(serialization::SelectorID ID, Selector Sel) override {
72  if (Previous)
73  Previous->SelectorRead(ID, Sel);
74  }
75  void MacroDefinitionRead(serialization::PreprocessedEntityID PPID,
76  MacroDefinitionRecord *MD) override {
77  if (Previous)
78  Previous->MacroDefinitionRead(PPID, MD);
79  }
80 };
81 
82 /// Dumps deserialized declarations.
83 class DeserializedDeclsDumper : public DelegatingDeserializationListener {
84 public:
85  explicit DeserializedDeclsDumper(ASTDeserializationListener *Previous,
86  bool DeletePrevious)
87  : DelegatingDeserializationListener(Previous, DeletePrevious) {}
88 
89  void DeclRead(serialization::DeclID ID, const Decl *D) override {
90  llvm::outs() << "PCH DECL: " << D->getDeclKindName();
91  if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
92  llvm::outs() << " - ";
93  ND->printQualifiedName(llvm::outs());
94  }
95  llvm::outs() << "\n";
96 
97  DelegatingDeserializationListener::DeclRead(ID, D);
98  }
99 };
100 
101 /// Checks deserialized declarations and emits error if a name
102 /// matches one given in command-line using -error-on-deserialized-decl.
103 class DeserializedDeclsChecker : public DelegatingDeserializationListener {
104  ASTContext &Ctx;
105  std::set<std::string> NamesToCheck;
106 
107 public:
108  DeserializedDeclsChecker(ASTContext &Ctx,
109  const std::set<std::string> &NamesToCheck,
110  ASTDeserializationListener *Previous,
111  bool DeletePrevious)
112  : DelegatingDeserializationListener(Previous, DeletePrevious), Ctx(Ctx),
113  NamesToCheck(NamesToCheck) {}
114 
115  void DeclRead(serialization::DeclID ID, const Decl *D) override {
116  if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
117  if (NamesToCheck.find(ND->getNameAsString()) != NamesToCheck.end()) {
118  unsigned DiagID
120  "%0 was deserialized");
121  Ctx.getDiagnostics().Report(Ctx.getFullLoc(D->getLocation()), DiagID)
122  << ND->getNameAsString();
123  }
124 
125  DelegatingDeserializationListener::DeclRead(ID, D);
126  }
127 };
128 
129 } // end anonymous namespace
130 
131 FrontendAction::FrontendAction() : Instance(nullptr) {}
132 
134 
136  std::unique_ptr<ASTUnit> AST) {
137  this->CurrentInput = CurrentInput;
138  CurrentASTUnit = std::move(AST);
139 }
140 
144  CI.getLangOpts().CurrentModule, /*AllowSearch*/false);
145 }
146 
147 std::unique_ptr<ASTConsumer>
148 FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
149  StringRef InFile) {
150  std::unique_ptr<ASTConsumer> Consumer = CreateASTConsumer(CI, InFile);
151  if (!Consumer)
152  return nullptr;
153 
154  // If there are no registered plugins we don't need to wrap the consumer
155  if (FrontendPluginRegistry::begin() == FrontendPluginRegistry::end())
156  return Consumer;
157 
158  // If this is a code completion run, avoid invoking the plugin consumers
159  if (CI.hasCodeCompletionConsumer())
160  return Consumer;
161 
162  // Collect the list of plugins that go before the main action (in Consumers)
163  // or after it (in AfterConsumers)
164  std::vector<std::unique_ptr<ASTConsumer>> Consumers;
165  std::vector<std::unique_ptr<ASTConsumer>> AfterConsumers;
166  for (FrontendPluginRegistry::iterator it = FrontendPluginRegistry::begin(),
167  ie = FrontendPluginRegistry::end();
168  it != ie; ++it) {
169  std::unique_ptr<PluginASTAction> P = it->instantiate();
170  PluginASTAction::ActionType ActionType = P->getActionType();
171  if (ActionType == PluginASTAction::Cmdline) {
172  // This is O(|plugins| * |add_plugins|), but since both numbers are
173  // way below 50 in practice, that's ok.
174  for (size_t i = 0, e = CI.getFrontendOpts().AddPluginActions.size();
175  i != e; ++i) {
176  if (it->getName() == CI.getFrontendOpts().AddPluginActions[i]) {
178  break;
179  }
180  }
181  }
182  if ((ActionType == PluginASTAction::AddBeforeMainAction ||
183  ActionType == PluginASTAction::AddAfterMainAction) &&
184  P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs[it->getName()])) {
185  std::unique_ptr<ASTConsumer> PluginConsumer = P->CreateASTConsumer(CI, InFile);
186  if (ActionType == PluginASTAction::AddBeforeMainAction) {
187  Consumers.push_back(std::move(PluginConsumer));
188  } else {
189  AfterConsumers.push_back(std::move(PluginConsumer));
190  }
191  }
192  }
193 
194  // Add to Consumers the main consumer, then all the plugins that go after it
195  Consumers.push_back(std::move(Consumer));
196  for (auto &C : AfterConsumers) {
197  Consumers.push_back(std::move(C));
198  }
199 
200  return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
201 }
202 
203 /// For preprocessed files, if the first line is the linemarker and specifies
204 /// the original source file name, use that name as the input file name.
205 /// Returns the location of the first token after the line marker directive.
206 ///
207 /// \param CI The compiler instance.
208 /// \param InputFile Populated with the filename from the line marker.
209 /// \param IsModuleMap If \c true, add a line note corresponding to this line
210 /// directive. (We need to do this because the directive will not be
211 /// visited by the preprocessor.)
213  std::string &InputFile,
214  bool IsModuleMap = false) {
215  auto &SourceMgr = CI.getSourceManager();
216  auto MainFileID = SourceMgr.getMainFileID();
217 
218  bool Invalid = false;
219  const auto *MainFileBuf = SourceMgr.getBuffer(MainFileID, &Invalid);
220  if (Invalid)
221  return SourceLocation();
222 
223  std::unique_ptr<Lexer> RawLexer(
224  new Lexer(MainFileID, MainFileBuf, SourceMgr, CI.getLangOpts()));
225 
226  // If the first line has the syntax of
227  //
228  // # NUM "FILENAME"
229  //
230  // we use FILENAME as the input file name.
231  Token T;
232  if (RawLexer->LexFromRawLexer(T) || T.getKind() != tok::hash)
233  return SourceLocation();
234  if (RawLexer->LexFromRawLexer(T) || T.isAtStartOfLine() ||
235  T.getKind() != tok::numeric_constant)
236  return SourceLocation();
237 
238  unsigned LineNo;
239  SourceLocation LineNoLoc = T.getLocation();
240  if (IsModuleMap) {
241  llvm::SmallString<16> Buffer;
242  if (Lexer::getSpelling(LineNoLoc, Buffer, SourceMgr, CI.getLangOpts())
243  .getAsInteger(10, LineNo))
244  return SourceLocation();
245  }
246 
247  RawLexer->LexFromRawLexer(T);
248  if (T.isAtStartOfLine() || T.getKind() != tok::string_literal)
249  return SourceLocation();
250 
251  StringLiteralParser Literal(T, CI.getPreprocessor());
252  if (Literal.hadError)
253  return SourceLocation();
254  RawLexer->LexFromRawLexer(T);
255  if (T.isNot(tok::eof) && !T.isAtStartOfLine())
256  return SourceLocation();
257  InputFile = Literal.GetString().str();
258 
259  if (IsModuleMap)
261  LineNoLoc, LineNo, SourceMgr.getLineTableFilenameID(InputFile), false,
262  false, SrcMgr::C_User_ModuleMap);
263 
264  return T.getLocation();
265 }
266 
267 static SmallVectorImpl<char> &
268 operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
269  Includes.append(RHS.begin(), RHS.end());
270  return Includes;
271 }
272 
273 static void addHeaderInclude(StringRef HeaderName,
274  SmallVectorImpl<char> &Includes,
275  const LangOptions &LangOpts,
276  bool IsExternC) {
277  if (IsExternC && LangOpts.CPlusPlus)
278  Includes += "extern \"C\" {\n";
279  if (LangOpts.ObjC1)
280  Includes += "#import \"";
281  else
282  Includes += "#include \"";
283 
284  Includes += HeaderName;
285 
286  Includes += "\"\n";
287  if (IsExternC && LangOpts.CPlusPlus)
288  Includes += "}\n";
289 }
290 
291 /// Collect the set of header includes needed to construct the given
292 /// module and update the TopHeaders file set of the module.
293 ///
294 /// \param Module The module we're collecting includes from.
295 ///
296 /// \param Includes Will be augmented with the set of \#includes or \#imports
297 /// needed to load all of the named headers.
298 static std::error_code collectModuleHeaderIncludes(
299  const LangOptions &LangOpts, FileManager &FileMgr, DiagnosticsEngine &Diag,
300  ModuleMap &ModMap, clang::Module *Module, SmallVectorImpl<char> &Includes) {
301  // Don't collect any headers for unavailable modules.
302  if (!Module->isAvailable())
303  return std::error_code();
304 
305  // Resolve all lazy header directives to header files.
306  ModMap.resolveHeaderDirectives(Module);
307 
308  // If any headers are missing, we can't build this module. In most cases,
309  // diagnostics for this should have already been produced; we only get here
310  // if explicit stat information was provided.
311  // FIXME: If the name resolves to a file with different stat information,
312  // produce a better diagnostic.
313  if (!Module->MissingHeaders.empty()) {
314  auto &MissingHeader = Module->MissingHeaders.front();
315  Diag.Report(MissingHeader.FileNameLoc, diag::err_module_header_missing)
316  << MissingHeader.IsUmbrella << MissingHeader.FileName;
317  return std::error_code();
318  }
319 
320  // Add includes for each of these headers.
321  for (auto HK : {Module::HK_Normal, Module::HK_Private}) {
322  for (Module::Header &H : Module->Headers[HK]) {
323  Module->addTopHeader(H.Entry);
324  // Use the path as specified in the module map file. We'll look for this
325  // file relative to the module build directory (the directory containing
326  // the module map file) so this will find the same file that we found
327  // while parsing the module map.
328  addHeaderInclude(H.NameAsWritten, Includes, LangOpts, Module->IsExternC);
329  }
330  }
331  // Note that Module->PrivateHeaders will not be a TopHeader.
332 
333  if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader()) {
334  Module->addTopHeader(UmbrellaHeader.Entry);
335  if (Module->Parent)
336  // Include the umbrella header for submodules.
337  addHeaderInclude(UmbrellaHeader.NameAsWritten, Includes, LangOpts,
338  Module->IsExternC);
339  } else if (Module::DirectoryName UmbrellaDir = Module->getUmbrellaDir()) {
340  // Add all of the headers we find in this subdirectory.
341  std::error_code EC;
342  SmallString<128> DirNative;
343  llvm::sys::path::native(UmbrellaDir.Entry->getName(), DirNative);
344 
345  llvm::vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
346  for (llvm::vfs::recursive_directory_iterator Dir(FS, DirNative, EC), End;
347  Dir != End && !EC; Dir.increment(EC)) {
348  // Check whether this entry has an extension typically associated with
349  // headers.
350  if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
351  .Cases(".h", ".H", ".hh", ".hpp", true)
352  .Default(false))
353  continue;
354 
355  const FileEntry *Header = FileMgr.getFile(Dir->path());
356  // FIXME: This shouldn't happen unless there is a file system race. Is
357  // that worth diagnosing?
358  if (!Header)
359  continue;
360 
361  // If this header is marked 'unavailable' in this module, don't include
362  // it.
363  if (ModMap.isHeaderUnavailableInModule(Header, Module))
364  continue;
365 
366  // Compute the relative path from the directory to this file.
367  SmallVector<StringRef, 16> Components;
368  auto PathIt = llvm::sys::path::rbegin(Dir->path());
369  for (int I = 0; I != Dir.level() + 1; ++I, ++PathIt)
370  Components.push_back(*PathIt);
371  SmallString<128> RelativeHeader(UmbrellaDir.NameAsWritten);
372  for (auto It = Components.rbegin(), End = Components.rend(); It != End;
373  ++It)
374  llvm::sys::path::append(RelativeHeader, *It);
375 
376  // Include this header as part of the umbrella directory.
377  Module->addTopHeader(Header);
378  addHeaderInclude(RelativeHeader, Includes, LangOpts, Module->IsExternC);
379  }
380 
381  if (EC)
382  return EC;
383  }
384 
385  // Recurse into submodules.
387  SubEnd = Module->submodule_end();
388  Sub != SubEnd; ++Sub)
389  if (std::error_code Err = collectModuleHeaderIncludes(
390  LangOpts, FileMgr, Diag, ModMap, *Sub, Includes))
391  return Err;
392 
393  return std::error_code();
394 }
395 
396 static bool loadModuleMapForModuleBuild(CompilerInstance &CI, bool IsSystem,
397  bool IsPreprocessed,
398  std::string &PresumedModuleMapFile,
399  unsigned &Offset) {
400  auto &SrcMgr = CI.getSourceManager();
402 
403  // Map the current input to a file.
404  FileID ModuleMapID = SrcMgr.getMainFileID();
405  const FileEntry *ModuleMap = SrcMgr.getFileEntryForID(ModuleMapID);
406 
407  // If the module map is preprocessed, handle the initial line marker;
408  // line directives are not part of the module map syntax in general.
409  Offset = 0;
410  if (IsPreprocessed) {
411  SourceLocation EndOfLineMarker =
412  ReadOriginalFileName(CI, PresumedModuleMapFile, /*IsModuleMap*/ true);
413  if (EndOfLineMarker.isValid())
414  Offset = CI.getSourceManager().getDecomposedLoc(EndOfLineMarker).second;
415  }
416 
417  // Load the module map file.
418  if (HS.loadModuleMapFile(ModuleMap, IsSystem, ModuleMapID, &Offset,
419  PresumedModuleMapFile))
420  return true;
421 
422  if (SrcMgr.getBuffer(ModuleMapID)->getBufferSize() == Offset)
423  Offset = 0;
424 
425  return false;
426 }
427 
429  StringRef ModuleMapFilename) {
430  if (CI.getLangOpts().CurrentModule.empty()) {
431  CI.getDiagnostics().Report(diag::err_missing_module_name);
432 
433  // FIXME: Eventually, we could consider asking whether there was just
434  // a single module described in the module map, and use that as a
435  // default. Then it would be fairly trivial to just "compile" a module
436  // map with a single module (the common case).
437  return nullptr;
438  }
439 
440  // Dig out the module definition.
443  /*AllowSearch=*/false);
444  if (!M) {
445  CI.getDiagnostics().Report(diag::err_missing_module)
446  << CI.getLangOpts().CurrentModule << ModuleMapFilename;
447 
448  return nullptr;
449  }
450 
451  // Check whether we can build this module at all.
453  CI.getDiagnostics(), M))
454  return nullptr;
455 
456  // Inform the preprocessor that includes from within the input buffer should
457  // be resolved relative to the build directory of the module map file.
459 
460  // If the module was inferred from a different module map (via an expanded
461  // umbrella module definition), track that fact.
462  // FIXME: It would be preferable to fill this in as part of processing
463  // the module map, rather than adding it after the fact.
464  StringRef OriginalModuleMapName = CI.getFrontendOpts().OriginalModuleMap;
465  if (!OriginalModuleMapName.empty()) {
466  auto *OriginalModuleMap =
467  CI.getFileManager().getFile(OriginalModuleMapName,
468  /*openFile*/ true);
469  if (!OriginalModuleMap) {
470  CI.getDiagnostics().Report(diag::err_module_map_not_found)
471  << OriginalModuleMapName;
472  return nullptr;
473  }
474  if (OriginalModuleMap != CI.getSourceManager().getFileEntryForID(
476  M->IsInferred = true;
478  .setInferredModuleAllowedBy(M, OriginalModuleMap);
479  }
480  }
481 
482  // If we're being run from the command-line, the module build stack will not
483  // have been filled in yet, so complete it now in order to allow us to detect
484  // module cycles.
485  SourceManager &SourceMgr = CI.getSourceManager();
486  if (SourceMgr.getModuleBuildStack().empty())
488  FullSourceLoc(SourceLocation(), SourceMgr));
489  return M;
490 }
491 
492 /// Compute the input buffer that should be used to build the specified module.
493 static std::unique_ptr<llvm::MemoryBuffer>
495  FileManager &FileMgr = CI.getFileManager();
496 
497  // Collect the set of #includes we need to build the module.
498  SmallString<256> HeaderContents;
499  std::error_code Err = std::error_code();
500  if (Module::Header UmbrellaHeader = M->getUmbrellaHeader())
501  addHeaderInclude(UmbrellaHeader.NameAsWritten, HeaderContents,
502  CI.getLangOpts(), M->IsExternC);
504  CI.getLangOpts(), FileMgr, CI.getDiagnostics(),
506  HeaderContents);
507 
508  if (Err) {
509  CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
510  << M->getFullModuleName() << Err.message();
511  return nullptr;
512  }
513 
514  return llvm::MemoryBuffer::getMemBufferCopy(
515  HeaderContents, Module::getModuleInputBufferName());
516 }
517 
519  const FrontendInputFile &RealInput) {
520  FrontendInputFile Input(RealInput);
521  assert(!Instance && "Already processing a source file!");
522  assert(!Input.isEmpty() && "Unexpected empty filename!");
523  setCurrentInput(Input);
524  setCompilerInstance(&CI);
525 
526  bool HasBegunSourceFile = false;
527  bool ReplayASTFile = Input.getKind().getFormat() == InputKind::Precompiled &&
529  if (!BeginInvocation(CI))
530  goto failure;
531 
532  // If we're replaying the build of an AST file, import it and set up
533  // the initial state from its build.
534  if (ReplayASTFile) {
536 
537  // The AST unit populates its own diagnostics engine rather than ours.
539  new DiagnosticsEngine(Diags->getDiagnosticIDs(),
540  &Diags->getDiagnosticOptions()));
541  ASTDiags->setClient(Diags->getClient(), /*OwnsClient*/false);
542 
543  // FIXME: What if the input is a memory buffer?
544  StringRef InputFile = Input.getFile();
545 
546  std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromASTFile(
548  ASTDiags, CI.getFileSystemOpts(), CI.getCodeGenOpts().DebugTypeExtRefs);
549  if (!AST)
550  goto failure;
551 
552  // Options relating to how we treat the input (but not what we do with it)
553  // are inherited from the AST unit.
554  CI.getHeaderSearchOpts() = AST->getHeaderSearchOpts();
555  CI.getPreprocessorOpts() = AST->getPreprocessorOpts();
556  CI.getLangOpts() = AST->getLangOpts();
557 
558  // Set the shared objects, these are reset when we finish processing the
559  // file, otherwise the CompilerInstance will happily destroy them.
560  CI.setFileManager(&AST->getFileManager());
562  CI.getSourceManager().initializeForReplay(AST->getSourceManager());
563 
564  // Preload all the module files loaded transitively by the AST unit. Also
565  // load all module map files that were parsed as part of building the AST
566  // unit.
567  if (auto ASTReader = AST->getASTReader()) {
568  auto &MM = ASTReader->getModuleManager();
569  auto &PrimaryModule = MM.getPrimaryModule();
570 
571  for (serialization::ModuleFile &MF : MM)
572  if (&MF != &PrimaryModule)
573  CI.getFrontendOpts().ModuleFiles.push_back(MF.FileName);
574 
575  ASTReader->visitTopLevelModuleMaps(PrimaryModule,
576  [&](const FileEntry *FE) {
577  CI.getFrontendOpts().ModuleMapFiles.push_back(FE->getName());
578  });
579  }
580 
581  // Set up the input file for replay purposes.
582  auto Kind = AST->getInputKind();
583  if (Kind.getFormat() == InputKind::ModuleMap) {
584  Module *ASTModule =
585  AST->getPreprocessor().getHeaderSearchInfo().lookupModule(
586  AST->getLangOpts().CurrentModule, /*AllowSearch*/ false);
587  assert(ASTModule && "module file does not define its own module");
588  Input = FrontendInputFile(ASTModule->PresumedModuleMapFile, Kind);
589  } else {
590  auto &OldSM = AST->getSourceManager();
591  FileID ID = OldSM.getMainFileID();
592  if (auto *File = OldSM.getFileEntryForID(ID))
593  Input = FrontendInputFile(File->getName(), Kind);
594  else
595  Input = FrontendInputFile(OldSM.getBuffer(ID), Kind);
596  }
597  setCurrentInput(Input, std::move(AST));
598  }
599 
600  // AST files follow a very different path, since they share objects via the
601  // AST unit.
602  if (Input.getKind().getFormat() == InputKind::Precompiled) {
603  assert(!usesPreprocessorOnly() && "this case was handled above");
604  assert(hasASTFileSupport() &&
605  "This action does not have AST file support!");
606 
608 
609  // FIXME: What if the input is a memory buffer?
610  StringRef InputFile = Input.getFile();
611 
612  std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromASTFile(
613  InputFile, CI.getPCHContainerReader(), ASTUnit::LoadEverything, Diags,
614  CI.getFileSystemOpts(), CI.getCodeGenOpts().DebugTypeExtRefs);
615 
616  if (!AST)
617  goto failure;
618 
619  // Inform the diagnostic client we are processing a source file.
620  CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);
621  HasBegunSourceFile = true;
622 
623  // Set the shared objects, these are reset when we finish processing the
624  // file, otherwise the CompilerInstance will happily destroy them.
625  CI.setFileManager(&AST->getFileManager());
626  CI.setSourceManager(&AST->getSourceManager());
627  CI.setPreprocessor(AST->getPreprocessorPtr());
628  Preprocessor &PP = CI.getPreprocessor();
630  PP.getLangOpts());
631  CI.setASTContext(&AST->getASTContext());
632 
633  setCurrentInput(Input, std::move(AST));
634 
635  // Initialize the action.
636  if (!BeginSourceFileAction(CI))
637  goto failure;
638 
639  // Create the AST consumer.
640  CI.setASTConsumer(CreateWrappedASTConsumer(CI, InputFile));
641  if (!CI.hasASTConsumer())
642  goto failure;
643 
644  return true;
645  }
646 
647  // Set up the file and source managers, if needed.
648  if (!CI.hasFileManager()) {
649  if (!CI.createFileManager()) {
650  goto failure;
651  }
652  }
653  if (!CI.hasSourceManager())
655 
656  // Set up embedding for any specified files. Do this before we load any
657  // source files, including the primary module map for the compilation.
658  for (const auto &F : CI.getFrontendOpts().ModulesEmbedFiles) {
659  if (const auto *FE = CI.getFileManager().getFile(F, /*openFile*/true))
661  else
662  CI.getDiagnostics().Report(diag::err_modules_embed_file_not_found) << F;
663  }
666 
667  // IR files bypass the rest of initialization.
668  if (Input.getKind().getLanguage() == InputKind::LLVM_IR) {
669  assert(hasIRSupport() &&
670  "This action does not have IR file support!");
671 
672  // Inform the diagnostic client we are processing a source file.
673  CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);
674  HasBegunSourceFile = true;
675 
676  // Initialize the action.
677  if (!BeginSourceFileAction(CI))
678  goto failure;
679 
680  // Initialize the main file entry.
681  if (!CI.InitializeSourceManager(CurrentInput))
682  goto failure;
683 
684  return true;
685  }
686 
687  // If the implicit PCH include is actually a directory, rather than
688  // a single file, search for a suitable PCH file in that directory.
689  if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
690  FileManager &FileMgr = CI.getFileManager();
692  StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
693  std::string SpecificModuleCachePath = CI.getSpecificModuleCachePath();
694  if (const DirectoryEntry *PCHDir = FileMgr.getDirectory(PCHInclude)) {
695  std::error_code EC;
696  SmallString<128> DirNative;
697  llvm::sys::path::native(PCHDir->getName(), DirNative);
698  bool Found = false;
699  llvm::vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
700  for (llvm::vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC),
701  DirEnd;
702  Dir != DirEnd && !EC; Dir.increment(EC)) {
703  // Check whether this is an acceptable AST file.
705  Dir->path(), FileMgr, CI.getPCHContainerReader(),
707  SpecificModuleCachePath)) {
708  PPOpts.ImplicitPCHInclude = Dir->path();
709  Found = true;
710  break;
711  }
712  }
713 
714  if (!Found) {
715  CI.getDiagnostics().Report(diag::err_fe_no_pch_in_dir) << PCHInclude;
716  goto failure;
717  }
718  }
719  }
720 
721  // Set up the preprocessor if needed. When parsing model files the
722  // preprocessor of the original source is reused.
723  if (!isModelParsingAction())
725 
726  // Inform the diagnostic client we are processing a source file.
728  &CI.getPreprocessor());
729  HasBegunSourceFile = true;
730 
731  // Initialize the main file entry.
732  if (!CI.InitializeSourceManager(Input))
733  goto failure;
734 
735  // For module map files, we first parse the module map and synthesize a
736  // "<module-includes>" buffer before more conventional processing.
737  if (Input.getKind().getFormat() == InputKind::ModuleMap) {
738  CI.getLangOpts().setCompilingModule(LangOptions::CMK_ModuleMap);
739 
740  std::string PresumedModuleMapFile;
741  unsigned OffsetToContents;
742  if (loadModuleMapForModuleBuild(CI, Input.isSystem(),
743  Input.isPreprocessed(),
744  PresumedModuleMapFile, OffsetToContents))
745  goto failure;
746 
747  auto *CurrentModule = prepareToBuildModule(CI, Input.getFile());
748  if (!CurrentModule)
749  goto failure;
750 
751  CurrentModule->PresumedModuleMapFile = PresumedModuleMapFile;
752 
753  if (OffsetToContents)
754  // If the module contents are in the same file, skip to them.
755  CI.getPreprocessor().setSkipMainFilePreamble(OffsetToContents, true);
756  else {
757  // Otherwise, convert the module description to a suitable input buffer.
758  auto Buffer = getInputBufferForModule(CI, CurrentModule);
759  if (!Buffer)
760  goto failure;
761 
762  // Reinitialize the main file entry to refer to the new input.
763  auto Kind = CurrentModule->IsSystem ? SrcMgr::C_System : SrcMgr::C_User;
764  auto &SourceMgr = CI.getSourceManager();
765  auto BufferID = SourceMgr.createFileID(std::move(Buffer), Kind);
766  assert(BufferID.isValid() && "couldn't creaate module buffer ID");
767  SourceMgr.setMainFileID(BufferID);
768  }
769  }
770 
771  // Initialize the action.
772  if (!BeginSourceFileAction(CI))
773  goto failure;
774 
775  // If we were asked to load any module map files, do so now.
776  for (const auto &Filename : CI.getFrontendOpts().ModuleMapFiles) {
777  if (auto *File = CI.getFileManager().getFile(Filename))
779  File, /*IsSystem*/false);
780  else
781  CI.getDiagnostics().Report(diag::err_module_map_not_found) << Filename;
782  }
783 
784  // Add a module declaration scope so that modules from -fmodule-map-file
785  // arguments may shadow modules found implicitly in search paths.
786  CI.getPreprocessor()
788  .getModuleMap()
790 
791  // Create the AST context and consumer unless this is a preprocessor only
792  // action.
793  if (!usesPreprocessorOnly()) {
794  // Parsing a model file should reuse the existing ASTContext.
795  if (!isModelParsingAction())
796  CI.createASTContext();
797 
798  // For preprocessed files, check if the first line specifies the original
799  // source file name with a linemarker.
800  std::string PresumedInputFile = getCurrentFileOrBufferName();
801  if (Input.isPreprocessed())
802  ReadOriginalFileName(CI, PresumedInputFile);
803 
804  std::unique_ptr<ASTConsumer> Consumer =
805  CreateWrappedASTConsumer(CI, PresumedInputFile);
806  if (!Consumer)
807  goto failure;
808 
809  // FIXME: should not overwrite ASTMutationListener when parsing model files?
810  if (!isModelParsingAction())
811  CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
812 
813  if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
814  // Convert headers to PCH and chain them.
815  IntrusiveRefCntPtr<ExternalSemaSource> source, FinalReader;
816  source = createChainedIncludesSource(CI, FinalReader);
817  if (!source)
818  goto failure;
819  CI.setModuleManager(static_cast<ASTReader *>(FinalReader.get()));
820  CI.getASTContext().setExternalSource(source);
821  } else if (CI.getLangOpts().Modules ||
822  !CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
823  // Use PCM or PCH.
824  assert(hasPCHSupport() && "This action does not have PCH support!");
825  ASTDeserializationListener *DeserialListener =
826  Consumer->GetASTDeserializationListener();
827  bool DeleteDeserialListener = false;
829  DeserialListener = new DeserializedDeclsDumper(DeserialListener,
830  DeleteDeserialListener);
831  DeleteDeserialListener = true;
832  }
834  DeserialListener = new DeserializedDeclsChecker(
835  CI.getASTContext(),
837  DeserialListener, DeleteDeserialListener);
838  DeleteDeserialListener = true;
839  }
840  if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
844  CI.getPreprocessorOpts().AllowPCHWithCompilerErrors, DeserialListener,
845  DeleteDeserialListener);
846  if (!CI.getASTContext().getExternalSource())
847  goto failure;
848  }
849  // If modules are enabled, create the module manager before creating
850  // any builtins, so that all declarations know that they might be
851  // extended by an external source.
852  if (CI.getLangOpts().Modules || !CI.hasASTContext() ||
854  CI.createModuleManager();
855  CI.getModuleManager()->setDeserializationListener(DeserialListener,
856  DeleteDeserialListener);
857  }
858  }
859 
860  CI.setASTConsumer(std::move(Consumer));
861  if (!CI.hasASTConsumer())
862  goto failure;
863  }
864 
865  // Initialize built-in info as long as we aren't using an external AST
866  // source.
867  if (CI.getLangOpts().Modules || !CI.hasASTContext() ||
869  Preprocessor &PP = CI.getPreprocessor();
871  PP.getLangOpts());
872  } else {
873  // FIXME: If this is a problem, recover from it by creating a multiplex
874  // source.
875  assert((!CI.getLangOpts().Modules || CI.getModuleManager()) &&
876  "modules enabled but created an external source that "
877  "doesn't support modules");
878  }
879 
880  // If we were asked to load any module files, do so now.
881  for (const auto &ModuleFile : CI.getFrontendOpts().ModuleFiles)
882  if (!CI.loadModuleFile(ModuleFile))
883  goto failure;
884 
885  // If there is a layout overrides file, attach an external AST source that
886  // provides the layouts from that file.
887  if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() &&
890  Override(new LayoutOverrideSource(
892  CI.getASTContext().setExternalSource(Override);
893  }
894 
895  return true;
896 
897  // If we failed, reset state since the client will not end up calling the
898  // matching EndSourceFile().
899 failure:
900  if (HasBegunSourceFile)
902  CI.clearOutputFiles(/*EraseFiles=*/true);
903  CI.getLangOpts().setCompilingModule(LangOptions::CMK_None);
905  setCompilerInstance(nullptr);
906  return false;
907 }
908 
911 
912  if (CI.hasFrontendTimer()) {
913  llvm::TimeRegion Timer(CI.getFrontendTimer());
914  ExecuteAction();
915  }
916  else ExecuteAction();
917 
918  // If we are supposed to rebuild the global module index, do so now unless
919  // there were any module-build failures.
920  if (CI.shouldBuildGlobalModuleIndex() && CI.hasFileManager() &&
921  CI.hasPreprocessor()) {
922  StringRef Cache =
924  if (!Cache.empty())
927  }
928 
929  return true;
930 }
931 
934 
935  // Inform the diagnostic client we are done with this source file.
937 
938  // Inform the preprocessor we are done.
939  if (CI.hasPreprocessor())
941 
942  // Finalize the action.
944 
945  // Sema references the ast consumer, so reset sema first.
946  //
947  // FIXME: There is more per-file stuff we could just drop here?
948  bool DisableFree = CI.getFrontendOpts().DisableFree;
949  if (DisableFree) {
950  CI.resetAndLeakSema();
952  BuryPointer(CI.takeASTConsumer().get());
953  } else {
954  CI.setSema(nullptr);
955  CI.setASTContext(nullptr);
956  CI.setASTConsumer(nullptr);
957  }
958 
959  if (CI.getFrontendOpts().ShowStats) {
960  llvm::errs() << "\nSTATISTICS FOR '" << getCurrentFile() << "':\n";
965  llvm::errs() << "\n";
966  }
967 
968  // Cleanup the output streams, and erase the output files if instructed by the
969  // FrontendAction.
970  CI.clearOutputFiles(/*EraseFiles=*/shouldEraseOutputFiles());
971 
972  if (isCurrentFileAST()) {
973  if (DisableFree) {
977  BuryPointer(CurrentASTUnit.release());
978  } else {
979  CI.setPreprocessor(nullptr);
980  CI.setSourceManager(nullptr);
981  CI.setFileManager(nullptr);
982  }
983  }
984 
985  setCompilerInstance(nullptr);
987  CI.getLangOpts().setCompilingModule(LangOptions::CMK_None);
988 }
989 
992 }
993 
994 //===----------------------------------------------------------------------===//
995 // Utility Actions
996 //===----------------------------------------------------------------------===//
997 
1000  if (!CI.hasPreprocessor())
1001  return;
1002 
1003  // FIXME: Move the truncation aspect of this into Sema, we delayed this till
1004  // here so the source manager would be initialized.
1005  if (hasCodeCompletionSupport() &&
1008 
1009  // Use a code completion consumer?
1010  CodeCompleteConsumer *CompletionConsumer = nullptr;
1011  if (CI.hasCodeCompletionConsumer())
1012  CompletionConsumer = &CI.getCodeCompletionConsumer();
1013 
1014  if (!CI.hasSema())
1015  CI.createSema(getTranslationUnitKind(), CompletionConsumer);
1016 
1019 }
1020 
1021 void PluginASTAction::anchor() { }
1022 
1023 std::unique_ptr<ASTConsumer>
1025  StringRef InFile) {
1026  llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
1027 }
1028 
1029 std::unique_ptr<ASTConsumer>
1031  StringRef InFile) {
1032  return WrappedAction->CreateASTConsumer(CI, InFile);
1033 }
1035  return WrappedAction->BeginInvocation(CI);
1036 }
1038  WrappedAction->setCurrentInput(getCurrentInput());
1039  WrappedAction->setCompilerInstance(&CI);
1040  auto Ret = WrappedAction->BeginSourceFileAction(CI);
1041  // BeginSourceFileAction may change CurrentInput, e.g. during module builds.
1042  setCurrentInput(WrappedAction->getCurrentInput());
1043  return Ret;
1044 }
1046  WrappedAction->ExecuteAction();
1047 }
1049  WrappedAction->EndSourceFileAction();
1050 }
1051 
1053  return WrappedAction->usesPreprocessorOnly();
1054 }
1056  return WrappedAction->getTranslationUnitKind();
1057 }
1059  return WrappedAction->hasPCHSupport();
1060 }
1062  return WrappedAction->hasASTFileSupport();
1063 }
1065  return WrappedAction->hasIRSupport();
1066 }
1068  return WrappedAction->hasCodeCompletionSupport();
1069 }
1070 
1072  std::unique_ptr<FrontendAction> WrappedAction)
1073  : WrappedAction(std::move(WrappedAction)) {}
1074 
void setExternalSource(IntrusiveRefCntPtr< ExternalASTSource > Source)
Attach an external AST source to the AST context.
Definition: ASTContext.cpp:864
Defines the clang::ASTContext interface.
static bool isAcceptableASTFile(StringRef Filename, FileManager &FileMgr, const PCHContainerReader &PCHContainerRdr, const LangOptions &LangOpts, const TargetOptions &TargetOpts, const PreprocessorOptions &PPOpts, StringRef ExistingModuleCachePath)
Determine whether the given AST file is acceptable to load into a translation unit with the given lan...
Definition: ASTReader.cpp:4933
static unsigned getSpelling(const Token &Tok, const char *&Buffer, const SourceManager &SourceMgr, const LangOptions &LangOpts, bool *Invalid=nullptr)
getSpelling - This method is used to get the spelling of a token into a preallocated buffer...
Definition: Lexer.cpp:389
void setInferredModuleAllowedBy(Module *M, const FileEntry *ModMap)
Definition: ModuleMap.cpp:1220
LangOptions & getLangOpts()
std::string OriginalModuleMap
When the input is a module map, the original module map file from which that map was inferred...
static DiagnosticBuilder Diag(DiagnosticsEngine *Diags, const LangOptions &Features, FullSourceLoc TokLoc, const char *TokBegin, const char *TokRangeBegin, const char *TokRangeEnd, unsigned DiagID)
Produce a diagnostic highlighting some portion of a literal.
PreprocessorOptions & getPreprocessorOpts()
void createCodeCompletionConsumer()
Create a code completion consumer using the invocation; note that this will cause the source manager ...
Lexer - This provides a simple interface that turns a text buffer into a stream of tokens...
Definition: Lexer.h:77
bool hasErrorOccurred() const
Definition: Diagnostic.h:746
Smart pointer class that efficiently represents Objective-C method names.
SmallVector< UnresolvedHeaderDirective, 1 > MissingHeaders
Headers that are mentioned in the module map file but could not be found on the file system...
Definition: Module.h:188
A (possibly-)qualified type.
Definition: Type.h:642
const char * getDeclKindName() const
Definition: DeclBase.cpp:123
std::vector< Module * >::iterator submodule_iterator
Definition: Module.h:553
Implements support for file system lookup, file system caching, and directory search management...
Definition: FileManager.h:117
IntrusiveRefCntPtr< ExternalSemaSource > createChainedIncludesSource(CompilerInstance &CI, IntrusiveRefCntPtr< ExternalSemaSource > &Reader)
The ChainedIncludesSource class converts headers to chained PCHs in memory, mainly for testing...
void PrintStats() const
Print some statistics to stderr that indicate how well the hashing is doing.
void EndSourceFile()
Perform any per-file post processing, deallocate per-file objects, and run statistics and output file...
submodule_iterator submodule_begin()
Definition: Module.h:556
TypePropertyCache< Private > Cache
Definition: Type.cpp:3465
virtual bool hasIRSupport() const
Does this action support use with IR files?
void ExecuteAction() override
Implement the ExecuteAction interface by running Sema on the already-initialized AST consumer...
Format getFormat() const
unsigned IsExternC
Whether this is an &#39;extern "C"&#39; module (which implicitly puts all headers in it within an &#39;extern "C"...
Definition: Module.h:231
void createSema(TranslationUnitKind TUKind, CodeCompleteConsumer *CompletionConsumer)
Create the Sema object to be used for parsing.
Load everything, including Sema.
Definition: ASTUnit.h:671
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
void EndSourceFile()
Inform the preprocessor callbacks that processing is complete.
StringRef P
virtual bool usesPreprocessorOnly() const =0
Does this action only use the preprocessor?
std::unique_ptr< ASTConsumer > CreateASTConsumer(CompilerInstance &CI, StringRef InFile) override
Provide a default implementation which returns aborts; this method should never be called by Frontend...
virtual bool hasASTFileSupport() const
Does this action support use with AST files?
DiagnosticsEngine & getDiagnostics() const
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1294
bool InitializeSourceManager(const FrontendInputFile &Input)
InitializeSourceManager - Initialize the source manager to set InputFile as the main file...
virtual void IdentifierRead(serialization::IdentID ID, IdentifierInfo *II)
An identifier was deserialized from the AST file.
PreprocessorOptions - This class is used for passing the various options used in preprocessor initial...
static std::unique_ptr< ASTUnit > LoadFromASTFile(const std::string &Filename, const PCHContainerReader &PCHContainerRdr, WhatToLoad ToLoad, IntrusiveRefCntPtr< DiagnosticsEngine > Diags, const FileSystemOptions &FileSystemOpts, bool UseDebugInfo=false, bool OnlyLocalDecls=false, ArrayRef< RemappedFile > RemappedFiles=None, bool CaptureDiagnostics=false, bool AllowPCHWithCompilerErrors=false, bool UserFilesAreVolatile=false)
Create a ASTUnit from an AST file.
Definition: ASTUnit.cpp:732
ASTContext & getASTContext() const
void setModuleManager(IntrusiveRefCntPtr< ASTReader > Reader)
static SourceLocation ReadOriginalFileName(CompilerInstance &CI, std::string &InputFile, bool IsModuleMap=false)
For preprocessed files, if the first line is the linemarker and specifies the original source file na...
void setSourceManager(SourceManager *Value)
setSourceManager - Replace the current source manager.
virtual void EndSourceFile()
Callback to inform the diagnostic client that processing of a source file has ended.
Definition: Diagnostic.h:1519
ModuleMap & getModuleMap()
Retrieve the module map.
Definition: HeaderSearch.h:655
Builtin::Context & getBuiltinInfo()
Definition: Preprocessor.h:838
virtual bool hasCodeCompletionSupport() const
Does this action support use with code completion?
std::string PresumedModuleMapFile
The presumed file name for the module map defining this module.
Definition: Module.h:100
tok::TokenKind getKind() const
Definition: Token.h:90
One of these records is kept for each identifier that is lexed.
static StringRef getModuleInputBufferName()
Definition: Module.h:574
virtual void ReaderInitialized(ASTReader *Reader)
The ASTReader was initialized.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:154
Record the location of a macro definition.
bool usesPreprocessorOnly() const override
Does this action only use the preprocessor?
bool BeginSourceFile(CompilerInstance &CI, const FrontendInputFile &Input)
Prepare the action for processing the input file Input.
void createSourceManager(FileManager &FileMgr)
Create the source manager and replace any existing one with it.
void resolveHeaderDirectives(const FileEntry *File) const
Resolve all lazy header directives for the specified file.
Definition: ModuleMap.cpp:1139
Definition: Format.h:2075
Module * getCurrentModule() const
std::unique_ptr< ASTConsumer > CreateASTConsumer(CompilerInstance &CI, StringRef InFile) override
Create the AST consumer object for this action, if supported.
Header getUmbrellaHeader() const
Retrieve the header that serves as the umbrella header for this module.
Definition: Module.h:483
bool isHeaderUnavailableInModule(const FileEntry *Header, const Module *RequestingModule) const
Determine whether the given header is unavailable as part of the specified module.
Definition: ModuleMap.cpp:671
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
void setASTContext(ASTContext *Value)
setASTContext - Replace the current AST context.
CodeGenOptions & getCodeGenOpts()
void finishModuleDeclarationScope()
Creates a new declaration scope for module names, allowing previously defined modules to shadow defin...
Definition: ModuleMap.h:557
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:827
Compiling a module from a module map.
Definition: LangOptions.h:74
std::vector< std::string > ModulesEmbedFiles
The list of files to embed into the compiled module file.
Describes a module or submodule.
Definition: Module.h:65
Execute the action before the main action.
CompilerInstance & getCompilerInstance() const
bool hasPCHSupport() const override
Does this action support use with PCH?
Action is determined by the cc1 command-line.
unsigned ShowStats
Show frontend performance metrics and statistics.
std::string getFullModuleName(bool AllowStringLiterals=false) const
Retrieve the full name of this module, including the path from its top-level module.
Definition: Module.cpp:214
ModuleBuildStack getModuleBuildStack() const
Retrieve the module build stack.
HeaderSearch & getHeaderSearchInfo() const
Definition: Preprocessor.h:833
FrontendOptions & getFrontendOpts()
uint32_t Offset
Definition: CacheTokens.cpp:43
ModuleManager & getModuleManager()
Retrieve the module manager.
Definition: ASTReader.h:1661
StringRef getCurrentFileOrBufferName() const
Load options and the preprocessor state.
Definition: ASTUnit.h:665
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
Module * Parent
The parent of this module.
Definition: Module.h:91
unsigned IsInferred
Whether this is an inferred submodule (module * { ... }).
Definition: Module.h:234
static Module * prepareToBuildModule(CompilerInstance &CI, StringRef ModuleMapFilename)
void setASTConsumer(std::unique_ptr< ASTConsumer > Value)
setASTConsumer - Replace the current AST consumer; the compiler instance takes ownership of Value...
unsigned SkipFunctionBodies
Skip over function bodies to speed up parsing in cases you do not need them (e.g. ...
bool loadModuleMapFile(const FileEntry *File, bool IsSystem, FileID ID=FileID(), unsigned *Offset=nullptr, StringRef OriginalModuleMapFile=StringRef())
Read the contents of the given module map file.
submodule_iterator submodule_end()
Definition: Module.h:558
virtual bool BeginInvocation(CompilerInstance &CI)
Callback before starting processing a single input, giving the opportunity to modify the CompilerInvo...
InputKind getKind() const
void setFileManager(FileManager *Value)
Replace the current file manager and virtual file system.
bool BeginInvocation(CompilerInstance &CI) override
Callback before starting processing a single input, giving the opportunity to modify the CompilerInvo...
HeaderSearchOptions & getHeaderSearchOpts()
bool DisablePCHValidation
When true, disables most of the normal validation performed on precompiled headers.
CodeCompleteConsumer & getCodeCompletionConsumer() const
static bool loadModuleMapForModuleBuild(CompilerInstance &CI, bool IsSystem, bool IsPreprocessed, std::string &PresumedModuleMapFile, unsigned &Offset)
virtual void SelectorRead(serialization::SelectorID iD, Selector Sel)
A selector was read from the AST file.
void createPCHExternalASTSource(StringRef Path, bool DisablePCHValidation, bool AllowPCHWithCompilerErrors, void *DeserializationListener, bool OwnDeserializationListener)
Create an external AST source to read a PCH file and attach it to the AST context.
Encapsulates the information needed to find the file referenced by a #include or #include_next, (sub-)framework lookup, etc.
Definition: HeaderSearch.h:148
void initializeForReplay(const SourceManager &Old)
Initialize this source manager suitably to replay the compilation described by Old.
StringRef getModuleCachePath() const
Retrieve the path to the module cache.
Definition: HeaderSearch.h:335
const FileEntry * getFile(StringRef Filename, bool OpenFile=false, bool CacheFailure=true)
Lookup, cache, and verify the specified file (real or virtual).
virtual void DeclRead(serialization::DeclID ID, const Decl *D)
A decl was deserialized from the AST file.
llvm::Registry< PluginASTAction > FrontendPluginRegistry
The frontend plugin registry.
bool hasCodeCompletionSupport() const override
Does this action support use with code completion?
std::string CurrentModule
The name of the current module, of which the main source file is a part.
Definition: LangOptions.h:194
const DirectoryEntry * getDirectory(StringRef DirName, bool CacheFailure=true)
Lookup, cache, and verify the specified directory (real or virtual).
StringRef Filename
Definition: Format.cpp:1620
virtual bool shouldEraseOutputFiles()
Callback at the end of processing a single input, to determine if the output files should be erased o...
std::vector< std::string > ChainedIncludes
Headers that will be converted to chained PCHs in memory.
void setCurrentInput(const FrontendInputFile &CurrentInput, std::unique_ptr< ASTUnit > AST=nullptr)
void setFileIsTransient(const FileEntry *SourceFile)
Specify that a file is transient.
IntrusiveRefCntPtr< ASTReader > getModuleManager() const
bool hasIRSupport() const override
Does this action support use with IR files?
SourceLocation End
std::string getSpecificModuleCachePath()
WrapperFrontendAction(std::unique_ptr< FrontendAction > WrappedAction)
Construct a WrapperFrontendAction from an existing action, taking ownership of it.
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
StateNode * Previous
FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos, SrcMgr::CharacteristicKind FileCharacter, int LoadedID=0, unsigned LoadedOffset=0)
Create a new FileID that represents the specified file being #included from the specified IncludePosi...
StringRef getFile() const
std::set< std::string > DeserializedPCHDeclsToErrorOn
This is a set of names for decls that we do not want to be deserialized, and we emit an error if they...
bool BeginSourceFileAction(CompilerInstance &CI) override
Callback at the start of processing a single input.
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
Defines the clang::Preprocessor interface.
Not compiling a module interface at all.
Definition: LangOptions.h:71
void createASTContext()
Create the AST context.
virtual void EndSourceFileAction()
Callback at the end of processing a single input.
TranslationUnitKind getTranslationUnitKind() override
For AST-based actions, the kind of translation unit we&#39;re handling.
static bool checkModuleIsAvailable(const LangOptions &LangOpts, const TargetInfo &TargetInfo, DiagnosticsEngine &Diags, Module *M)
Check that the given module is available, producing a diagnostic if not.
Information about a module that has been loaded by the ASTReader.
Definition: Module.h:108
unsigned ModulesEmbedAllFiles
Whether we should embed all used files into the PCM file.
void setSema(Sema *S)
Replace the current Sema; the compiler instance takes ownership of S.
FileManager * createFileManager()
Create the file manager and replace any existing one with it.
An input file for the front end.
virtual std::unique_ptr< ASTConsumer > CreateASTConsumer(CompilerInstance &CI, StringRef InFile)=0
Create the AST consumer object for this action, if supported.
bool isAvailable() const
Determine whether this module is available for use within the current translation unit...
Definition: Module.h:379
Information about a header directive as found in the module map file.
Definition: Module.h:151
virtual void ExecuteAction()=0
Callback to run the program action, using the initialized compiler instance.
void EndSourceFileAction() override
Callback at the end of processing a single input.
bool AllowPCHWithCompilerErrors
When true, a PCH with compiler errors will not be rejected.
const DirectoryEntry * Directory
The build directory of this module.
Definition: Module.h:96
virtual bool hasPCHSupport() const
Does this action support use with PCH?
FileSystemOptions & getFileSystemOpts()
Kind
CompilerInstance - Helper class for managing a single instance of the Clang compiler.
Encodes a location in the source.
bool Execute()
Set the source manager&#39;s main input file, and run the action.
StringRef getName() const
Definition: FileManager.h:85
std::vector< std::string > ModuleFiles
The list of additional prebuilt module files to load before processing the input. ...
ParsedSourceLocation CodeCompletionAt
If given, enable code completion at the provided location.
virtual TranslationUnitKind getTranslationUnitKind()
For AST-based actions, the kind of translation unit we&#39;re handling.
std::string ImplicitPCHInclude
The implicit PCH included at the start of the translation unit, or empty.
virtual void MacroDefinitionRead(serialization::PreprocessedEntityID, MacroDefinitionRecord *MD)
A macro definition was read from the AST file.
void ExecuteAction() override
Callback to run the program action, using the initialized compiler instance.
LLVM IR: we accept this so that we can run the optimizer on it, and compile it to assembly or object ...
Information about a directory name as found in the module map file.
Definition: Module.h:160
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:835
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:60
SmallVector< Header, 2 > Headers[5]
The headers that are part of this module.
Definition: Module.h:168
void ParseAST(Preprocessor &pp, ASTConsumer *C, ASTContext &Ctx, bool PrintStats=false, TranslationUnitKind TUKind=TU_Complete, CodeCompleteConsumer *CompletionConsumer=nullptr, bool SkipFunctionBodies=false)
Parse the entire file specified, notifying the ASTConsumer as the file is parsed. ...
Definition: ParseAST.cpp:99
static std::error_code collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr, DiagnosticsEngine &Diag, ModuleMap &ModMap, clang::Module *Module, SmallVectorImpl< char > &Includes)
Collect the set of header includes needed to construct the given module and update the TopHeaders fil...
void initializeBuiltins(IdentifierTable &Table, const LangOptions &LangOpts)
Mark the identifiers for all the builtins with their appropriate builtin ID # and mark any non-portab...
Definition: Builtins.cpp:87
std::unordered_map< std::string, std::vector< std::string > > PluginArgs
Args to pass to the plugins.
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:266
Execute the action after the main action.
unsigned getCustomDiagID(Level L, const char(&FormatString)[N])
Return an ID for a diagnostic with the specified format string and level.
Definition: Diagnostic.h:775
void pushModuleBuildStack(StringRef moduleName, FullSourceLoc importLoc)
Push an entry to the module build stack.
void createPreprocessor(TranslationUnitKind TUKind)
Create the preprocessor, using the invocation, file, and source managers, and replace any existing on...
virtual void TypeRead(serialization::TypeIdx Idx, QualType T)
A type was deserialized from the AST file.
bool shouldBuildGlobalModuleIndex() const
Indicates whether we should (re)build the global module index.
uint32_t PreprocessedEntityID
An ID number that refers to an entity in the detailed preprocessing record.
Definition: ASTBitCodes.h:169
std::string OverrideRecordLayoutsFile
File name of the file that will provide record layouts (in the format produced by -fdump-record-layou...
Abstract interface for a consumer of code-completion information.
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
uint32_t SelectorID
An ID number that refers to an ObjC selector in an AST file.
Definition: ASTBitCodes.h:154
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
void setPreprocessor(std::shared_ptr< Preprocessor > Value)
Replace the current preprocessor.
FileManager & getFileManager() const
Return the current file manager to the caller.
llvm::Timer & getFrontendTimer() const
const FrontendInputFile & getCurrentInput() const
Language getLanguage() const
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:355
ModuleFile & getPrimaryModule()
Returns the primary module associated with the manager, that is, the first module loaded...
void PrintStats() const
Print statistics to stderr.
FileID getMainFileID() const
Returns the FileID of the main source file.
StringRef getCurrentFile() const
bool loadModuleFile(StringRef FileName)
void setASTMutationListener(ASTMutationListener *Listener)
Attach an AST mutation listener to the AST context.
Definition: ASTContext.h:1098
void AddLineNote(SourceLocation Loc, unsigned LineNo, int FilenameID, bool IsFileEntry, bool IsFileExit, SrcMgr::CharacteristicKind FileKind)
Add a line note to the line table for the FileID and offset specified by Loc.
SourceManager & getSourceManager() const
Return the current source manager.
void addTopHeader(const FileEntry *File)
Add a top-level header associated with this module.
Definition: Module.h:496
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1089
uint32_t DeclID
An ID number that refers to a declaration in an AST file.
Definition: ASTBitCodes.h:69
void clearOutputFiles(bool EraseFiles)
clearOutputFiles - Clear the output file list.
void BuryPointer(const void *Ptr)
TargetInfo & getTarget() const
uint32_t IdentID
An ID number that refers to an identifier in an AST file.
Definition: ASTBitCodes.h:135
bool hasASTFileSupport() const override
Does this action support use with AST files?
void visitTopLevelModuleMaps(serialization::ModuleFile &MF, llvm::function_ref< void(const FileEntry *)> Visitor)
Visit all the top-level module maps loaded when building the given module file.
Definition: ASTReader.cpp:9213
void setCompilerInstance(CompilerInstance *Value)
Module * lookupModule(StringRef ModuleName, bool AllowSearch=true, bool AllowExtraModuleMapSearch=false)
Lookup a module Search for a module with the given name.
DirectoryName getUmbrellaDir() const
Retrieve the directory for which this module serves as the umbrella.
Definition: Module.cpp:239
std::vector< std::string > AddPluginActions
The list of plugin actions to run in addition to the normal action.
Cached information about one directory (either on disk or in the virtual file system).
Definition: FileManager.h:46
unsigned DisableFree
Disable memory freeing on exit.
The type-property cache.
Definition: Type.cpp:3419
Preprocessor & getPreprocessor() const
Return the current preprocessor.
bool hasCodeCompletionConsumer() const
DiagnosticConsumer & getDiagnosticClient() const
An external AST source that overrides the layout of a specified set of record types.
virtual bool BeginSourceFileAction(CompilerInstance &CI)
Callback at the start of processing a single input.
void setMainFileDir(const DirectoryEntry *Dir)
Set the directory in which the main file should be considered to have been found, if it is not a real...
TranslationUnitKind
Describes the kind of translation unit being processed.
Definition: LangOptions.h:329
StringLiteralParser - This decodes string escape characters and performs wide string analysis and Tra...
const PCHContainerReader & getPCHContainerReader() const
Return the appropriate PCHContainerReader depending on the current CodeGenOptions.
A SourceLocation and its associated SourceManager.
DiagnosticsEngine & getDiagnostics() const
Get the current diagnostics engine.
bool isCurrentFileAST() const
Defines the clang::FrontendAction interface and various convenience abstract classes (clang::ASTFront...
std::unique_ptr< ASTConsumer > takeASTConsumer()
takeASTConsumer - Remove the current AST consumer and give ownership to the caller.
static std::unique_ptr< llvm::MemoryBuffer > getInputBufferForModule(CompilerInstance &CI, Module *M)
Compute the input buffer that should be used to build the specified module.
static ErrorCode writeIndex(FileManager &FileMgr, const PCHContainerReader &PCHContainerRdr, llvm::StringRef Path)
Write a global index into the given.
void setAllFilesAreTransient(bool Transient)
Specify that all files that are read during this compilation are transient.
void setSkipMainFilePreamble(unsigned Bytes, bool StartOfLine)
Instruct the preprocessor to skip part of the main source file.
This represents a decl that may have a name.
Definition: Decl.h:248
bool DumpDeserializedPCHDecls
Dump declarations that are deserialized from PCH, for testing.
virtual void BeginSourceFile(const LangOptions &LangOpts, const Preprocessor *PP=nullptr)
Callback to inform the diagnostic client that processing of a source file is beginning.
Definition: Diagnostic.h:1511
static SmallVectorImpl< char > & operator+=(SmallVectorImpl< char > &Includes, StringRef RHS)
TargetOptions & getTargetOpts()
FullSourceLoc getFullLoc(SourceLocation Loc) const
Definition: ASTContext.h:728
This class handles loading and caching of source files into memory.
static void addHeaderInclude(StringRef HeaderName, SmallVectorImpl< char > &Includes, const LangOptions &LangOpts, bool IsExternC)
IntrusiveRefCntPtr< llvm::vfs::FileSystem > getVirtualFileSystem() const
Definition: FileManager.h:226
A type index; the type ID with the qualifier bits removed.
Definition: ASTBitCodes.h:89
SourceLocation getLocation() const
Definition: DeclBase.h:418
std::pair< FileID, unsigned > getDecomposedLoc(SourceLocation Loc) const
Decompose the specified location into a raw FileID + Offset pair.
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:127
virtual bool isModelParsingAction() const
Is this action invoked on a model file?
std::vector< std::string > ModuleMapFiles
The list of module map files to load before processing the input.