1 //===--- CompilerInstance.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/CompilerInstance.h"
11 #include "clang/AST/ASTConsumer.h"
12 #include "clang/AST/ASTContext.h"
13 #include "clang/AST/Decl.h"
14 #include "clang/Basic/Diagnostic.h"
15 #include "clang/Basic/FileManager.h"
16 #include "clang/Basic/MemoryBufferCache.h"
17 #include "clang/Basic/SourceManager.h"
18 #include "clang/Basic/TargetInfo.h"
19 #include "clang/Basic/Version.h"
20 #include "clang/Config/config.h"
21 #include "clang/Frontend/ChainedDiagnosticConsumer.h"
22 #include "clang/Frontend/FrontendAction.h"
23 #include "clang/Frontend/FrontendActions.h"
24 #include "clang/Frontend/FrontendDiagnostic.h"
25 #include "clang/Frontend/LogDiagnosticPrinter.h"
26 #include "clang/Frontend/SerializedDiagnosticPrinter.h"
27 #include "clang/Frontend/TextDiagnosticPrinter.h"
28 #include "clang/Frontend/Utils.h"
29 #include "clang/Frontend/VerifyDiagnosticConsumer.h"
30 #include "clang/Lex/HeaderSearch.h"
31 #include "clang/Lex/PTHManager.h"
32 #include "clang/Lex/Preprocessor.h"
33 #include "clang/Lex/PreprocessorOptions.h"
34 #include "clang/Sema/CodeCompleteConsumer.h"
35 #include "clang/Sema/Sema.h"
36 #include "clang/Serialization/ASTReader.h"
37 #include "clang/Serialization/GlobalModuleIndex.h"
38 #include "llvm/ADT/Statistic.h"
39 #include "llvm/Support/CrashRecoveryContext.h"
40 #include "llvm/Support/Errc.h"
41 #include "llvm/Support/FileSystem.h"
42 #include "llvm/Support/Host.h"
43 #include "llvm/Support/LockFileManager.h"
44 #include "llvm/Support/MemoryBuffer.h"
45 #include "llvm/Support/Path.h"
46 #include "llvm/Support/Program.h"
47 #include "llvm/Support/Signals.h"
48 #include "llvm/Support/Timer.h"
49 #include "llvm/Support/raw_ostream.h"
51 #include <system_error>
55 using namespace clang;
57 CompilerInstance::CompilerInstance(
58 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
59 MemoryBufferCache *SharedPCMCache)
60 : ModuleLoader(/* BuildingModule = */ SharedPCMCache),
61 Invocation(new CompilerInvocation()),
62 PCMCache(SharedPCMCache ? SharedPCMCache : new MemoryBufferCache),
63 ThePCHContainerOperations(std::move(PCHContainerOps)) {
64 // Don't allow this to invalidate buffers in use by others.
66 getPCMCache().finalizeCurrentBuffers();
69 CompilerInstance::~CompilerInstance() {
70 assert(OutputFiles.empty() && "Still output files in flight?");
73 void CompilerInstance::setInvocation(
74 std::shared_ptr<CompilerInvocation> Value) {
75 Invocation = std::move(Value);
78 bool CompilerInstance::shouldBuildGlobalModuleIndex() const {
79 return (BuildGlobalModuleIndex ||
80 (ModuleManager && ModuleManager->isGlobalIndexUnavailable() &&
81 getFrontendOpts().GenerateGlobalModuleIndex)) &&
85 void CompilerInstance::setDiagnostics(DiagnosticsEngine *Value) {
89 void CompilerInstance::setTarget(TargetInfo *Value) { Target = Value; }
90 void CompilerInstance::setAuxTarget(TargetInfo *Value) { AuxTarget = Value; }
92 void CompilerInstance::setFileManager(FileManager *Value) {
95 VirtualFileSystem = Value->getVirtualFileSystem();
97 VirtualFileSystem.reset();
100 void CompilerInstance::setSourceManager(SourceManager *Value) {
104 void CompilerInstance::setPreprocessor(std::shared_ptr<Preprocessor> Value) {
105 PP = std::move(Value);
108 void CompilerInstance::setASTContext(ASTContext *Value) {
111 if (Context && Consumer)
112 getASTConsumer().Initialize(getASTContext());
115 void CompilerInstance::setSema(Sema *S) {
119 void CompilerInstance::setASTConsumer(std::unique_ptr<ASTConsumer> Value) {
120 Consumer = std::move(Value);
122 if (Context && Consumer)
123 getASTConsumer().Initialize(getASTContext());
126 void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
127 CompletionConsumer.reset(Value);
130 std::unique_ptr<Sema> CompilerInstance::takeSema() {
131 return std::move(TheSema);
134 IntrusiveRefCntPtr<ASTReader> CompilerInstance::getModuleManager() const {
135 return ModuleManager;
137 void CompilerInstance::setModuleManager(IntrusiveRefCntPtr<ASTReader> Reader) {
138 assert(PCMCache.get() == &Reader->getModuleManager().getPCMCache() &&
139 "Expected ASTReader to use the same PCM cache");
140 ModuleManager = std::move(Reader);
143 std::shared_ptr<ModuleDependencyCollector>
144 CompilerInstance::getModuleDepCollector() const {
145 return ModuleDepCollector;
148 void CompilerInstance::setModuleDepCollector(
149 std::shared_ptr<ModuleDependencyCollector> Collector) {
150 ModuleDepCollector = std::move(Collector);
153 static void collectHeaderMaps(const HeaderSearch &HS,
154 std::shared_ptr<ModuleDependencyCollector> MDC) {
155 SmallVector<std::string, 4> HeaderMapFileNames;
156 HS.getHeaderMapFileNames(HeaderMapFileNames);
157 for (auto &Name : HeaderMapFileNames)
161 static void collectIncludePCH(CompilerInstance &CI,
162 std::shared_ptr<ModuleDependencyCollector> MDC) {
163 const PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
164 if (PPOpts.ImplicitPCHInclude.empty())
167 StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
168 FileManager &FileMgr = CI.getFileManager();
169 const DirectoryEntry *PCHDir = FileMgr.getDirectory(PCHInclude);
171 MDC->addFile(PCHInclude);
176 SmallString<128> DirNative;
177 llvm::sys::path::native(PCHDir->getName(), DirNative);
178 vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
179 SimpleASTReaderListener Validator(CI.getPreprocessor());
180 for (vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC), DirEnd;
181 Dir != DirEnd && !EC; Dir.increment(EC)) {
182 // Check whether this is an AST file. ASTReader::isAcceptableASTFile is not
183 // used here since we're not interested in validating the PCH at this time,
184 // but only to check whether this is a file containing an AST.
185 if (!ASTReader::readASTFileControlBlock(
186 Dir->getName(), FileMgr, CI.getPCHContainerReader(),
187 /*FindModuleFileExtensions=*/false, Validator,
188 /*ValidateDiagnosticOptions=*/false))
189 MDC->addFile(Dir->getName());
193 static void collectVFSEntries(CompilerInstance &CI,
194 std::shared_ptr<ModuleDependencyCollector> MDC) {
195 if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
198 // Collect all VFS found.
199 SmallVector<vfs::YAMLVFSEntry, 16> VFSEntries;
200 for (const std::string &VFSFile : CI.getHeaderSearchOpts().VFSOverlayFiles) {
201 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
202 llvm::MemoryBuffer::getFile(VFSFile);
205 vfs::collectVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr,
206 VFSFile, VFSEntries);
209 for (auto &E : VFSEntries)
210 MDC->addFile(E.VPath, E.RPath);
214 static void SetUpDiagnosticLog(DiagnosticOptions *DiagOpts,
215 const CodeGenOptions *CodeGenOpts,
216 DiagnosticsEngine &Diags) {
218 std::unique_ptr<raw_ostream> StreamOwner;
219 raw_ostream *OS = &llvm::errs();
220 if (DiagOpts->DiagnosticLogFile != "-") {
221 // Create the output stream.
222 auto FileOS = llvm::make_unique<llvm::raw_fd_ostream>(
223 DiagOpts->DiagnosticLogFile, EC,
224 llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
226 Diags.Report(diag::warn_fe_cc_log_diagnostics_failure)
227 << DiagOpts->DiagnosticLogFile << EC.message();
229 FileOS->SetUnbuffered();
231 StreamOwner = std::move(FileOS);
235 // Chain in the diagnostic client which will log the diagnostics.
236 auto Logger = llvm::make_unique<LogDiagnosticPrinter>(*OS, DiagOpts,
237 std::move(StreamOwner));
239 Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags);
240 assert(Diags.ownsClient());
242 new ChainedDiagnosticConsumer(Diags.takeClient(), std::move(Logger)));
245 static void SetupSerializedDiagnostics(DiagnosticOptions *DiagOpts,
246 DiagnosticsEngine &Diags,
247 StringRef OutputFile) {
248 auto SerializedConsumer =
249 clang::serialized_diags::create(OutputFile, DiagOpts);
251 if (Diags.ownsClient()) {
252 Diags.setClient(new ChainedDiagnosticConsumer(
253 Diags.takeClient(), std::move(SerializedConsumer)));
255 Diags.setClient(new ChainedDiagnosticConsumer(
256 Diags.getClient(), std::move(SerializedConsumer)));
260 void CompilerInstance::createDiagnostics(DiagnosticConsumer *Client,
261 bool ShouldOwnClient) {
262 Diagnostics = createDiagnostics(&getDiagnosticOpts(), Client,
263 ShouldOwnClient, &getCodeGenOpts());
266 IntrusiveRefCntPtr<DiagnosticsEngine>
267 CompilerInstance::createDiagnostics(DiagnosticOptions *Opts,
268 DiagnosticConsumer *Client,
269 bool ShouldOwnClient,
270 const CodeGenOptions *CodeGenOpts) {
271 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
272 IntrusiveRefCntPtr<DiagnosticsEngine>
273 Diags(new DiagnosticsEngine(DiagID, Opts));
275 // Create the diagnostic client for reporting errors or for
276 // implementing -verify.
278 Diags->setClient(Client, ShouldOwnClient);
280 Diags->setClient(new TextDiagnosticPrinter(llvm::errs(), Opts));
282 // Chain in -verify checker, if requested.
283 if (Opts->VerifyDiagnostics)
284 Diags->setClient(new VerifyDiagnosticConsumer(*Diags));
286 // Chain in -diagnostic-log-file dumper, if requested.
287 if (!Opts->DiagnosticLogFile.empty())
288 SetUpDiagnosticLog(Opts, CodeGenOpts, *Diags);
290 if (!Opts->DiagnosticSerializationFile.empty())
291 SetupSerializedDiagnostics(Opts, *Diags,
292 Opts->DiagnosticSerializationFile);
294 // Configure our handling of diagnostics.
295 ProcessWarningOptions(*Diags, *Opts);
302 void CompilerInstance::createFileManager() {
303 if (!hasVirtualFileSystem()) {
304 // TODO: choose the virtual file system based on the CompilerInvocation.
305 setVirtualFileSystem(vfs::getRealFileSystem());
307 FileMgr = new FileManager(getFileSystemOpts(), VirtualFileSystem);
312 void CompilerInstance::createSourceManager(FileManager &FileMgr) {
313 SourceMgr = new SourceManager(getDiagnostics(), FileMgr);
316 // Initialize the remapping of files to alternative contents, e.g.,
317 // those specified through other files.
318 static void InitializeFileRemapping(DiagnosticsEngine &Diags,
319 SourceManager &SourceMgr,
320 FileManager &FileMgr,
321 const PreprocessorOptions &InitOpts) {
322 // Remap files in the source manager (with buffers).
323 for (const auto &RB : InitOpts.RemappedFileBuffers) {
324 // Create the file entry for the file that we're mapping from.
325 const FileEntry *FromFile =
326 FileMgr.getVirtualFile(RB.first, RB.second->getBufferSize(), 0);
328 Diags.Report(diag::err_fe_remap_missing_from_file) << RB.first;
329 if (!InitOpts.RetainRemappedFileBuffers)
334 // Override the contents of the "from" file with the contents of
336 SourceMgr.overrideFileContents(FromFile, RB.second,
337 InitOpts.RetainRemappedFileBuffers);
340 // Remap files in the source manager (with other files).
341 for (const auto &RF : InitOpts.RemappedFiles) {
342 // Find the file that we're mapping to.
343 const FileEntry *ToFile = FileMgr.getFile(RF.second);
345 Diags.Report(diag::err_fe_remap_missing_to_file) << RF.first << RF.second;
349 // Create the file entry for the file that we're mapping from.
350 const FileEntry *FromFile =
351 FileMgr.getVirtualFile(RF.first, ToFile->getSize(), 0);
353 Diags.Report(diag::err_fe_remap_missing_from_file) << RF.first;
357 // Override the contents of the "from" file with the contents of
359 SourceMgr.overrideFileContents(FromFile, ToFile);
362 SourceMgr.setOverridenFilesKeepOriginalName(
363 InitOpts.RemappedFilesKeepOriginalName);
368 void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
369 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
371 // Create a PTH manager if we are using some form of a token cache.
372 PTHManager *PTHMgr = nullptr;
373 if (!PPOpts.TokenCache.empty())
374 PTHMgr = PTHManager::Create(PPOpts.TokenCache, getDiagnostics());
376 // Create the Preprocessor.
377 HeaderSearch *HeaderInfo =
378 new HeaderSearch(getHeaderSearchOptsPtr(), getSourceManager(),
379 getDiagnostics(), getLangOpts(), &getTarget());
380 PP = std::make_shared<Preprocessor>(
381 Invocation->getPreprocessorOptsPtr(), getDiagnostics(), getLangOpts(),
382 getSourceManager(), getPCMCache(), *HeaderInfo, *this, PTHMgr,
383 /*OwnsHeaderSearch=*/true, TUKind);
384 PP->Initialize(getTarget(), getAuxTarget());
386 // Note that this is different then passing PTHMgr to Preprocessor's ctor.
387 // That argument is used as the IdentifierInfoLookup argument to
388 // IdentifierTable's ctor.
390 PTHMgr->setPreprocessor(&*PP);
391 PP->setPTHManager(PTHMgr);
394 if (PPOpts.DetailedRecord)
395 PP->createPreprocessingRecord();
397 // Apply remappings to the source manager.
398 InitializeFileRemapping(PP->getDiagnostics(), PP->getSourceManager(),
399 PP->getFileManager(), PPOpts);
401 // Predefine macros and configure the preprocessor.
402 InitializePreprocessor(*PP, PPOpts, getPCHContainerReader(),
405 // Initialize the header search object. In CUDA compilations, we use the aux
406 // triple (the host triple) to initialize our header search, since we need to
407 // find the host headers in order to compile the CUDA code.
408 const llvm::Triple *HeaderSearchTriple = &PP->getTargetInfo().getTriple();
409 if (PP->getTargetInfo().getTriple().getOS() == llvm::Triple::CUDA &&
410 PP->getAuxTargetInfo())
411 HeaderSearchTriple = &PP->getAuxTargetInfo()->getTriple();
413 ApplyHeaderSearchOptions(PP->getHeaderSearchInfo(), getHeaderSearchOpts(),
414 PP->getLangOpts(), *HeaderSearchTriple);
416 PP->setPreprocessedOutput(getPreprocessorOutputOpts().ShowCPP);
418 if (PP->getLangOpts().Modules && PP->getLangOpts().ImplicitModules)
419 PP->getHeaderSearchInfo().setModuleCachePath(getSpecificModuleCachePath());
421 // Handle generating dependencies, if requested.
422 const DependencyOutputOptions &DepOpts = getDependencyOutputOpts();
423 if (!DepOpts.OutputFile.empty())
424 TheDependencyFileGenerator.reset(
425 DependencyFileGenerator::CreateAndAttachToPreprocessor(*PP, DepOpts));
426 if (!DepOpts.DOTOutputFile.empty())
427 AttachDependencyGraphGen(*PP, DepOpts.DOTOutputFile,
428 getHeaderSearchOpts().Sysroot);
430 // If we don't have a collector, but we are collecting module dependencies,
431 // then we're the top level compiler instance and need to create one.
432 if (!ModuleDepCollector && !DepOpts.ModuleDependencyOutputDir.empty()) {
433 ModuleDepCollector = std::make_shared<ModuleDependencyCollector>(
434 DepOpts.ModuleDependencyOutputDir);
437 // If there is a module dep collector, register with other dep collectors
438 // and also (a) collect header maps and (b) TODO: input vfs overlay files.
439 if (ModuleDepCollector) {
440 addDependencyCollector(ModuleDepCollector);
441 collectHeaderMaps(PP->getHeaderSearchInfo(), ModuleDepCollector);
442 collectIncludePCH(*this, ModuleDepCollector);
443 collectVFSEntries(*this, ModuleDepCollector);
446 for (auto &Listener : DependencyCollectors)
447 Listener->attachToPreprocessor(*PP);
449 // Handle generating header include information, if requested.
450 if (DepOpts.ShowHeaderIncludes)
451 AttachHeaderIncludeGen(*PP, DepOpts);
452 if (!DepOpts.HeaderIncludeOutputFile.empty()) {
453 StringRef OutputPath = DepOpts.HeaderIncludeOutputFile;
454 if (OutputPath == "-")
456 AttachHeaderIncludeGen(*PP, DepOpts,
457 /*ShowAllHeaders=*/true, OutputPath,
458 /*ShowDepth=*/false);
461 if (DepOpts.PrintShowIncludes) {
462 AttachHeaderIncludeGen(*PP, DepOpts,
463 /*ShowAllHeaders=*/true, /*OutputPath=*/"",
464 /*ShowDepth=*/true, /*MSStyle=*/true);
468 std::string CompilerInstance::getSpecificModuleCachePath() {
469 // Set up the module path, including the hash for the
470 // module-creation options.
471 SmallString<256> SpecificModuleCache(getHeaderSearchOpts().ModuleCachePath);
472 if (!SpecificModuleCache.empty() && !getHeaderSearchOpts().DisableModuleHash)
473 llvm::sys::path::append(SpecificModuleCache,
474 getInvocation().getModuleHash());
475 return SpecificModuleCache.str();
480 void CompilerInstance::createASTContext() {
481 Preprocessor &PP = getPreprocessor();
482 auto *Context = new ASTContext(getLangOpts(), PP.getSourceManager(),
483 PP.getIdentifierTable(), PP.getSelectorTable(),
484 PP.getBuiltinInfo());
485 Context->InitBuiltinTypes(getTarget(), getAuxTarget());
486 setASTContext(Context);
491 void CompilerInstance::createPCHExternalASTSource(
492 StringRef Path, bool DisablePCHValidation, bool AllowPCHWithCompilerErrors,
493 void *DeserializationListener, bool OwnDeserializationListener) {
494 bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
495 ModuleManager = createPCHExternalASTSource(
496 Path, getHeaderSearchOpts().Sysroot, DisablePCHValidation,
497 AllowPCHWithCompilerErrors, getPreprocessor(), getASTContext(),
498 getPCHContainerReader(),
499 getFrontendOpts().ModuleFileExtensions,
500 TheDependencyFileGenerator.get(),
501 DependencyCollectors,
502 DeserializationListener,
503 OwnDeserializationListener, Preamble,
504 getFrontendOpts().UseGlobalModuleIndex);
507 IntrusiveRefCntPtr<ASTReader> CompilerInstance::createPCHExternalASTSource(
508 StringRef Path, StringRef Sysroot, bool DisablePCHValidation,
509 bool AllowPCHWithCompilerErrors, Preprocessor &PP, ASTContext &Context,
510 const PCHContainerReader &PCHContainerRdr,
511 ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
512 DependencyFileGenerator *DependencyFile,
513 ArrayRef<std::shared_ptr<DependencyCollector>> DependencyCollectors,
514 void *DeserializationListener, bool OwnDeserializationListener,
515 bool Preamble, bool UseGlobalModuleIndex) {
516 HeaderSearchOptions &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts();
518 IntrusiveRefCntPtr<ASTReader> Reader(new ASTReader(
519 PP, Context, PCHContainerRdr, Extensions,
520 Sysroot.empty() ? "" : Sysroot.data(), DisablePCHValidation,
521 AllowPCHWithCompilerErrors, /*AllowConfigurationMismatch*/ false,
522 HSOpts.ModulesValidateSystemHeaders, UseGlobalModuleIndex));
524 // We need the external source to be set up before we read the AST, because
525 // eagerly-deserialized declarations may use it.
526 Context.setExternalSource(Reader.get());
528 Reader->setDeserializationListener(
529 static_cast<ASTDeserializationListener *>(DeserializationListener),
530 /*TakeOwnership=*/OwnDeserializationListener);
533 DependencyFile->AttachToASTReader(*Reader);
534 for (auto &Listener : DependencyCollectors)
535 Listener->attachToASTReader(*Reader);
537 switch (Reader->ReadAST(Path,
538 Preamble ? serialization::MK_Preamble
539 : serialization::MK_PCH,
541 ASTReader::ARR_None)) {
542 case ASTReader::Success:
543 // Set the predefines buffer as suggested by the PCH reader. Typically, the
544 // predefines buffer will be empty.
545 PP.setPredefines(Reader->getSuggestedPredefines());
548 case ASTReader::Failure:
549 // Unrecoverable failure: don't even try to process the input file.
552 case ASTReader::Missing:
553 case ASTReader::OutOfDate:
554 case ASTReader::VersionMismatch:
555 case ASTReader::ConfigurationMismatch:
556 case ASTReader::HadErrors:
557 // No suitable PCH file could be found. Return an error.
561 Context.setExternalSource(nullptr);
567 static bool EnableCodeCompletion(Preprocessor &PP,
571 // Tell the source manager to chop off the given file at a specific
573 const FileEntry *Entry = PP.getFileManager().getFile(Filename);
575 PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
580 // Truncate the named file at the given line/column.
581 PP.SetCodeCompletionPoint(Entry, Line, Column);
585 void CompilerInstance::createCodeCompletionConsumer() {
586 const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt;
587 if (!CompletionConsumer) {
588 setCodeCompletionConsumer(
589 createCodeCompletionConsumer(getPreprocessor(),
590 Loc.FileName, Loc.Line, Loc.Column,
591 getFrontendOpts().CodeCompleteOpts,
593 if (!CompletionConsumer)
595 } else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName,
596 Loc.Line, Loc.Column)) {
597 setCodeCompletionConsumer(nullptr);
601 if (CompletionConsumer->isOutputBinary() &&
602 llvm::sys::ChangeStdoutToBinary()) {
603 getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary);
604 setCodeCompletionConsumer(nullptr);
608 void CompilerInstance::createFrontendTimer() {
609 FrontendTimerGroup.reset(
610 new llvm::TimerGroup("frontend", "Clang front-end time report"));
612 new llvm::Timer("frontend", "Clang front-end timer",
613 *FrontendTimerGroup));
616 CodeCompleteConsumer *
617 CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
621 const CodeCompleteOptions &Opts,
623 if (EnableCodeCompletion(PP, Filename, Line, Column))
626 // Set up the creation routine for code-completion.
627 return new PrintingCodeCompleteConsumer(Opts, OS);
630 void CompilerInstance::createSema(TranslationUnitKind TUKind,
631 CodeCompleteConsumer *CompletionConsumer) {
632 TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(),
633 TUKind, CompletionConsumer));
634 // Attach the external sema source if there is any.
635 if (ExternalSemaSrc) {
636 TheSema->addExternalSource(ExternalSemaSrc.get());
637 ExternalSemaSrc->InitializeSema(*TheSema);
643 void CompilerInstance::addOutputFile(OutputFile &&OutFile) {
644 OutputFiles.push_back(std::move(OutFile));
647 void CompilerInstance::clearOutputFiles(bool EraseFiles) {
648 for (OutputFile &OF : OutputFiles) {
649 if (!OF.TempFilename.empty()) {
651 llvm::sys::fs::remove(OF.TempFilename);
653 SmallString<128> NewOutFile(OF.Filename);
655 // If '-working-directory' was passed, the output filename should be
657 FileMgr->FixupRelativePath(NewOutFile);
658 if (std::error_code ec =
659 llvm::sys::fs::rename(OF.TempFilename, NewOutFile)) {
660 getDiagnostics().Report(diag::err_unable_to_rename_temp)
661 << OF.TempFilename << OF.Filename << ec.message();
663 llvm::sys::fs::remove(OF.TempFilename);
666 } else if (!OF.Filename.empty() && EraseFiles)
667 llvm::sys::fs::remove(OF.Filename);
670 if (DeleteBuiltModules) {
671 for (auto &Module : BuiltModules)
672 llvm::sys::fs::remove(Module.second);
673 BuiltModules.clear();
675 NonSeekStream.reset();
678 std::unique_ptr<raw_pwrite_stream>
679 CompilerInstance::createDefaultOutputFile(bool Binary, StringRef InFile,
680 StringRef Extension) {
681 return createOutputFile(getFrontendOpts().OutputFile, Binary,
682 /*RemoveFileOnSignal=*/true, InFile, Extension,
683 /*UseTemporary=*/true);
686 std::unique_ptr<raw_pwrite_stream> CompilerInstance::createNullOutputFile() {
687 return llvm::make_unique<llvm::raw_null_ostream>();
690 std::unique_ptr<raw_pwrite_stream>
691 CompilerInstance::createOutputFile(StringRef OutputPath, bool Binary,
692 bool RemoveFileOnSignal, StringRef InFile,
693 StringRef Extension, bool UseTemporary,
694 bool CreateMissingDirectories) {
695 std::string OutputPathName, TempPathName;
697 std::unique_ptr<raw_pwrite_stream> OS = createOutputFile(
698 OutputPath, EC, Binary, RemoveFileOnSignal, InFile, Extension,
699 UseTemporary, CreateMissingDirectories, &OutputPathName, &TempPathName);
701 getDiagnostics().Report(diag::err_fe_unable_to_open_output) << OutputPath
706 // Add the output file -- but don't try to remove "-", since this means we are
709 OutputFile((OutputPathName != "-") ? OutputPathName : "", TempPathName));
714 std::unique_ptr<llvm::raw_pwrite_stream> CompilerInstance::createOutputFile(
715 StringRef OutputPath, std::error_code &Error, bool Binary,
716 bool RemoveFileOnSignal, StringRef InFile, StringRef Extension,
717 bool UseTemporary, bool CreateMissingDirectories,
718 std::string *ResultPathName, std::string *TempPathName) {
719 assert((!CreateMissingDirectories || UseTemporary) &&
720 "CreateMissingDirectories is only allowed when using temporary files");
722 std::string OutFile, TempFile;
723 if (!OutputPath.empty()) {
724 OutFile = OutputPath;
725 } else if (InFile == "-") {
727 } else if (!Extension.empty()) {
728 SmallString<128> Path(InFile);
729 llvm::sys::path::replace_extension(Path, Extension);
730 OutFile = Path.str();
735 std::unique_ptr<llvm::raw_fd_ostream> OS;
740 UseTemporary = false;
742 llvm::sys::fs::file_status Status;
743 llvm::sys::fs::status(OutputPath, Status);
744 if (llvm::sys::fs::exists(Status)) {
745 // Fail early if we can't write to the final destination.
746 if (!llvm::sys::fs::can_write(OutputPath)) {
747 Error = make_error_code(llvm::errc::operation_not_permitted);
751 // Don't use a temporary if the output is a special file. This handles
752 // things like '-o /dev/null'
753 if (!llvm::sys::fs::is_regular_file(Status))
754 UseTemporary = false;
760 // Create a temporary file.
761 SmallString<128> TempPath;
763 TempPath += "-%%%%%%%%";
766 llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
768 if (CreateMissingDirectories &&
769 EC == llvm::errc::no_such_file_or_directory) {
770 StringRef Parent = llvm::sys::path::parent_path(OutputPath);
771 EC = llvm::sys::fs::create_directories(Parent);
773 EC = llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
778 OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true));
779 OSFile = TempFile = TempPath.str();
781 // If we failed to create the temporary, fallback to writing to the file
782 // directly. This handles the corner case where we cannot write to the
783 // directory, but can write to the file.
788 OS.reset(new llvm::raw_fd_ostream(
790 (Binary ? llvm::sys::fs::F_None : llvm::sys::fs::F_Text)));
795 // Make sure the out stream file gets removed if we crash.
796 if (RemoveFileOnSignal)
797 llvm::sys::RemoveFileOnSignal(OSFile);
800 *ResultPathName = OutFile;
802 *TempPathName = TempFile;
804 if (!Binary || OS->supportsSeeking())
805 return std::move(OS);
807 auto B = llvm::make_unique<llvm::buffer_ostream>(*OS);
808 assert(!NonSeekStream);
809 NonSeekStream = std::move(OS);
813 // Initialization Utilities
815 bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input){
816 return InitializeSourceManager(
817 Input, getDiagnostics(), getFileManager(), getSourceManager(),
818 hasPreprocessor() ? &getPreprocessor().getHeaderSearchInfo() : nullptr,
819 getDependencyOutputOpts(), getFrontendOpts());
823 bool CompilerInstance::InitializeSourceManager(
824 const FrontendInputFile &Input, DiagnosticsEngine &Diags,
825 FileManager &FileMgr, SourceManager &SourceMgr, HeaderSearch *HS,
826 DependencyOutputOptions &DepOpts, const FrontendOptions &Opts) {
827 SrcMgr::CharacteristicKind
828 Kind = Input.isSystem() ? SrcMgr::C_System : SrcMgr::C_User;
830 if (Input.isBuffer()) {
831 SourceMgr.setMainFileID(SourceMgr.createFileID(
832 std::unique_ptr<llvm::MemoryBuffer>(Input.getBuffer()), Kind));
833 assert(SourceMgr.getMainFileID().isValid() &&
834 "Couldn't establish MainFileID!");
838 StringRef InputFile = Input.getFile();
840 // Figure out where to get and map in the main file.
841 if (InputFile != "-") {
842 const FileEntry *File;
843 if (Opts.FindPchSource.empty()) {
844 File = FileMgr.getFile(InputFile, /*OpenFile=*/true);
846 // When building a pch file in clang-cl mode, the .h file is built as if
847 // it was included by a cc file. Since the driver doesn't know about
848 // all include search directories, the frontend must search the input
849 // file through HeaderSearch here, as if it had been included by the
850 // cc file at Opts.FindPchSource.
851 const FileEntry *FindFile = FileMgr.getFile(Opts.FindPchSource);
853 Diags.Report(diag::err_fe_error_reading) << Opts.FindPchSource;
856 const DirectoryLookup *UnusedCurDir;
857 SmallVector<std::pair<const FileEntry *, const DirectoryEntry *>, 16>
859 Includers.push_back(std::make_pair(FindFile, FindFile->getDir()));
860 File = HS->LookupFile(InputFile, SourceLocation(), /*isAngled=*/false,
862 /*CurDir=*/UnusedCurDir, Includers,
863 /*SearchPath=*/nullptr,
864 /*RelativePath=*/nullptr,
865 /*RequestingModule=*/nullptr,
866 /*SuggestedModule=*/nullptr, /*IsMapped=*/nullptr,
868 // Also add the header to /showIncludes output.
870 DepOpts.ShowIncludesPretendHeader = File->getName();
873 Diags.Report(diag::err_fe_error_reading) << InputFile;
877 // The natural SourceManager infrastructure can't currently handle named
878 // pipes, but we would at least like to accept them for the main
879 // file. Detect them here, read them with the volatile flag so FileMgr will
880 // pick up the correct size, and simply override their contents as we do for
882 if (File->isNamedPipe()) {
883 auto MB = FileMgr.getBufferForFile(File, /*isVolatile=*/true);
885 // Create a new virtual file that will have the correct size.
886 File = FileMgr.getVirtualFile(InputFile, (*MB)->getBufferSize(), 0);
887 SourceMgr.overrideFileContents(File, std::move(*MB));
889 Diags.Report(diag::err_cannot_open_file) << InputFile
890 << MB.getError().message();
895 SourceMgr.setMainFileID(
896 SourceMgr.createFileID(File, SourceLocation(), Kind));
898 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> SBOrErr =
899 llvm::MemoryBuffer::getSTDIN();
900 if (std::error_code EC = SBOrErr.getError()) {
901 Diags.Report(diag::err_fe_error_reading_stdin) << EC.message();
904 std::unique_ptr<llvm::MemoryBuffer> SB = std::move(SBOrErr.get());
906 const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(),
907 SB->getBufferSize(), 0);
908 SourceMgr.setMainFileID(
909 SourceMgr.createFileID(File, SourceLocation(), Kind));
910 SourceMgr.overrideFileContents(File, std::move(SB));
913 assert(SourceMgr.getMainFileID().isValid() &&
914 "Couldn't establish MainFileID!");
918 // High-Level Operations
920 bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
921 assert(hasDiagnostics() && "Diagnostics engine is not initialized!");
922 assert(!getFrontendOpts().ShowHelp && "Client must handle '-help'!");
923 assert(!getFrontendOpts().ShowVersion && "Client must handle '-version'!");
925 // FIXME: Take this as an argument, once all the APIs we used have moved to
926 // taking it as an input instead of hard-coding llvm::errs.
927 raw_ostream &OS = llvm::errs();
929 // Create the target instance.
930 setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(),
931 getInvocation().TargetOpts));
935 // Create TargetInfo for the other side of CUDA compilation.
936 if (getLangOpts().CUDA && !getFrontendOpts().AuxTriple.empty()) {
937 auto TO = std::make_shared<TargetOptions>();
938 TO->Triple = getFrontendOpts().AuxTriple;
939 TO->HostTriple = getTarget().getTriple().str();
940 setAuxTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), TO));
943 // Inform the target of the language options.
945 // FIXME: We shouldn't need to do this, the target should be immutable once
946 // created. This complexity should be lifted elsewhere.
947 getTarget().adjust(getLangOpts());
949 // Adjust target options based on codegen options.
950 getTarget().adjustTargetOptions(getCodeGenOpts(), getTargetOpts());
952 // rewriter project will change target built-in bool type from its default.
953 if (getFrontendOpts().ProgramAction == frontend::RewriteObjC)
954 getTarget().noSignedCharForObjCBool();
956 // Validate/process some options.
957 if (getHeaderSearchOpts().Verbose)
958 OS << "clang -cc1 version " CLANG_VERSION_STRING
959 << " based upon " << BACKEND_PACKAGE_STRING
960 << " default target " << llvm::sys::getDefaultTargetTriple() << "\n";
962 if (getFrontendOpts().ShowTimers)
963 createFrontendTimer();
965 if (getFrontendOpts().ShowStats || !getFrontendOpts().StatsFile.empty())
966 llvm::EnableStatistics(false);
968 for (const FrontendInputFile &FIF : getFrontendOpts().Inputs) {
969 // Reset the ID tables if we are reusing the SourceManager and parsing
971 if (hasSourceManager() && !Act.isModelParsingAction())
972 getSourceManager().clearIDTables();
974 if (Act.BeginSourceFile(*this, FIF)) {
980 // Notify the diagnostic client that all files were processed.
981 getDiagnostics().getClient()->finish();
983 if (getDiagnosticOpts().ShowCarets) {
984 // We can have multiple diagnostics sharing one diagnostic client.
985 // Get the total number of warnings/errors from the client.
986 unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings();
987 unsigned NumErrors = getDiagnostics().getClient()->getNumErrors();
990 OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s");
991 if (NumWarnings && NumErrors)
994 OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s");
995 if (NumWarnings || NumErrors)
996 OS << " generated.\n";
999 if (getFrontendOpts().ShowStats) {
1000 if (hasFileManager()) {
1001 getFileManager().PrintStats();
1004 llvm::PrintStatistics(OS);
1006 StringRef StatsFile = getFrontendOpts().StatsFile;
1007 if (!StatsFile.empty()) {
1009 auto StatS = llvm::make_unique<llvm::raw_fd_ostream>(StatsFile, EC,
1010 llvm::sys::fs::F_Text);
1012 getDiagnostics().Report(diag::warn_fe_unable_to_open_stats_file)
1013 << StatsFile << EC.message();
1015 llvm::PrintStatisticsJSON(*StatS);
1019 return !getDiagnostics().getClient()->getNumErrors();
1022 /// \brief Determine the appropriate source input kind based on language
1024 static InputKind::Language getLanguageFromOptions(const LangOptions &LangOpts) {
1025 if (LangOpts.OpenCL)
1026 return InputKind::OpenCL;
1028 return InputKind::CUDA;
1030 return LangOpts.CPlusPlus ? InputKind::ObjCXX : InputKind::ObjC;
1031 return LangOpts.CPlusPlus ? InputKind::CXX : InputKind::C;
1034 /// \brief Compile a module file for the given module, using the options
1035 /// provided by the importing compiler instance. Returns true if the module
1036 /// was built without errors.
1038 compileModuleImpl(CompilerInstance &ImportingInstance, SourceLocation ImportLoc,
1039 StringRef ModuleName, FrontendInputFile Input,
1040 StringRef OriginalModuleMapFile, StringRef ModuleFileName,
1041 llvm::function_ref<void(CompilerInstance &)> PreBuildStep =
1042 [](CompilerInstance &) {},
1043 llvm::function_ref<void(CompilerInstance &)> PostBuildStep =
1044 [](CompilerInstance &) {}) {
1045 // Construct a compiler invocation for creating this module.
1047 std::make_shared<CompilerInvocation>(ImportingInstance.getInvocation());
1049 PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
1051 // For any options that aren't intended to affect how a module is built,
1052 // reset them to their default values.
1053 Invocation->getLangOpts()->resetNonModularOptions();
1054 PPOpts.resetNonModularOptions();
1056 // Remove any macro definitions that are explicitly ignored by the module.
1057 // They aren't supposed to affect how the module is built anyway.
1058 HeaderSearchOptions &HSOpts = Invocation->getHeaderSearchOpts();
1059 PPOpts.Macros.erase(
1060 std::remove_if(PPOpts.Macros.begin(), PPOpts.Macros.end(),
1061 [&HSOpts](const std::pair<std::string, bool> &def) {
1062 StringRef MacroDef = def.first;
1063 return HSOpts.ModulesIgnoreMacros.count(
1064 llvm::CachedHashString(MacroDef.split('=').first)) > 0;
1066 PPOpts.Macros.end());
1068 // Note the name of the module we're building.
1069 Invocation->getLangOpts()->CurrentModule = ModuleName;
1071 // Make sure that the failed-module structure has been allocated in
1072 // the importing instance, and propagate the pointer to the newly-created
1074 PreprocessorOptions &ImportingPPOpts
1075 = ImportingInstance.getInvocation().getPreprocessorOpts();
1076 if (!ImportingPPOpts.FailedModules)
1077 ImportingPPOpts.FailedModules =
1078 std::make_shared<PreprocessorOptions::FailedModulesSet>();
1079 PPOpts.FailedModules = ImportingPPOpts.FailedModules;
1081 // If there is a module map file, build the module using the module map.
1082 // Set up the inputs/outputs so that we build the module from its umbrella
1084 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
1085 FrontendOpts.OutputFile = ModuleFileName.str();
1086 FrontendOpts.DisableFree = false;
1087 FrontendOpts.GenerateGlobalModuleIndex = false;
1088 FrontendOpts.BuildingImplicitModule = true;
1089 FrontendOpts.OriginalModuleMap = OriginalModuleMapFile;
1090 // Force implicitly-built modules to hash the content of the module file.
1091 HSOpts.ModulesHashContent = true;
1092 FrontendOpts.Inputs = {Input};
1094 // Don't free the remapped file buffers; they are owned by our caller.
1095 PPOpts.RetainRemappedFileBuffers = true;
1097 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
1098 assert(ImportingInstance.getInvocation().getModuleHash() ==
1099 Invocation->getModuleHash() && "Module hash mismatch!");
1101 // Construct a compiler instance that will be used to actually create the
1102 // module. Since we're sharing a PCMCache,
1103 // CompilerInstance::CompilerInstance is responsible for finalizing the
1104 // buffers to prevent use-after-frees.
1105 CompilerInstance Instance(ImportingInstance.getPCHContainerOperations(),
1106 &ImportingInstance.getPreprocessor().getPCMCache());
1107 auto &Inv = *Invocation;
1108 Instance.setInvocation(std::move(Invocation));
1110 Instance.createDiagnostics(new ForwardingDiagnosticConsumer(
1111 ImportingInstance.getDiagnosticClient()),
1112 /*ShouldOwnClient=*/true);
1114 Instance.setVirtualFileSystem(&ImportingInstance.getVirtualFileSystem());
1116 // Note that this module is part of the module build stack, so that we
1117 // can detect cycles in the module graph.
1118 Instance.setFileManager(&ImportingInstance.getFileManager());
1119 Instance.createSourceManager(Instance.getFileManager());
1120 SourceManager &SourceMgr = Instance.getSourceManager();
1121 SourceMgr.setModuleBuildStack(
1122 ImportingInstance.getSourceManager().getModuleBuildStack());
1123 SourceMgr.pushModuleBuildStack(ModuleName,
1124 FullSourceLoc(ImportLoc, ImportingInstance.getSourceManager()));
1126 // If we're collecting module dependencies, we need to share a collector
1127 // between all of the module CompilerInstances. Other than that, we don't
1128 // want to produce any dependency output from the module build.
1129 Instance.setModuleDepCollector(ImportingInstance.getModuleDepCollector());
1130 Inv.getDependencyOutputOpts() = DependencyOutputOptions();
1132 ImportingInstance.getDiagnostics().Report(ImportLoc,
1133 diag::remark_module_build)
1134 << ModuleName << ModuleFileName;
1136 PreBuildStep(Instance);
1138 // Execute the action to actually build the module in-place. Use a separate
1139 // thread so that we get a stack large enough.
1140 const unsigned ThreadStackSize = 8 << 20;
1141 llvm::CrashRecoveryContext CRC;
1142 CRC.RunSafelyOnThread(
1144 GenerateModuleFromModuleMapAction Action;
1145 Instance.ExecuteAction(Action);
1149 PostBuildStep(Instance);
1151 ImportingInstance.getDiagnostics().Report(ImportLoc,
1152 diag::remark_module_build_done)
1155 // Delete the temporary module map file.
1156 // FIXME: Even though we're executing under crash protection, it would still
1157 // be nice to do this with RemoveFileOnSignal when we can. However, that
1158 // doesn't make sense for all clients, so clean this up manually.
1159 Instance.clearOutputFiles(/*EraseFiles=*/true);
1161 return !Instance.getDiagnostics().hasErrorOccurred();
1164 /// \brief Compile a module file for the given module, using the options
1165 /// provided by the importing compiler instance. Returns true if the module
1166 /// was built without errors.
1167 static bool compileModuleImpl(CompilerInstance &ImportingInstance,
1168 SourceLocation ImportLoc,
1170 StringRef ModuleFileName) {
1171 InputKind IK(getLanguageFromOptions(ImportingInstance.getLangOpts()),
1172 InputKind::ModuleMap);
1174 // Get or create the module map that we'll use to build this module.
1176 = ImportingInstance.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1178 if (const FileEntry *ModuleMapFile =
1179 ModMap.getContainingModuleMapFile(Module)) {
1180 // Use the module map where this module resides.
1181 Result = compileModuleImpl(
1182 ImportingInstance, ImportLoc, Module->getTopLevelModuleName(),
1183 FrontendInputFile(ModuleMapFile->getName(), IK, +Module->IsSystem),
1184 ModMap.getModuleMapFileForUniquing(Module)->getName(),
1187 // FIXME: We only need to fake up an input file here as a way of
1188 // transporting the module's directory to the module map parser. We should
1189 // be able to do that more directly, and parse from a memory buffer without
1190 // inventing this file.
1191 SmallString<128> FakeModuleMapFile(Module->Directory->getName());
1192 llvm::sys::path::append(FakeModuleMapFile, "__inferred_module.map");
1194 std::string InferredModuleMapContent;
1195 llvm::raw_string_ostream OS(InferredModuleMapContent);
1199 Result = compileModuleImpl(
1200 ImportingInstance, ImportLoc, Module->getTopLevelModuleName(),
1201 FrontendInputFile(FakeModuleMapFile, IK, +Module->IsSystem),
1202 ModMap.getModuleMapFileForUniquing(Module)->getName(),
1204 [&](CompilerInstance &Instance) {
1205 std::unique_ptr<llvm::MemoryBuffer> ModuleMapBuffer =
1206 llvm::MemoryBuffer::getMemBuffer(InferredModuleMapContent);
1207 ModuleMapFile = Instance.getFileManager().getVirtualFile(
1208 FakeModuleMapFile, InferredModuleMapContent.size(), 0);
1209 Instance.getSourceManager().overrideFileContents(
1210 ModuleMapFile, std::move(ModuleMapBuffer));
1214 // We've rebuilt a module. If we're allowed to generate or update the global
1215 // module index, record that fact in the importing compiler instance.
1216 if (ImportingInstance.getFrontendOpts().GenerateGlobalModuleIndex) {
1217 ImportingInstance.setBuildGlobalModuleIndex(true);
1223 static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
1224 SourceLocation ImportLoc,
1225 SourceLocation ModuleNameLoc, Module *Module,
1226 StringRef ModuleFileName) {
1227 DiagnosticsEngine &Diags = ImportingInstance.getDiagnostics();
1229 auto diagnoseBuildFailure = [&] {
1230 Diags.Report(ModuleNameLoc, diag::err_module_not_built)
1231 << Module->Name << SourceRange(ImportLoc, ModuleNameLoc);
1234 // FIXME: have LockFileManager return an error_code so that we can
1235 // avoid the mkdir when the directory already exists.
1236 StringRef Dir = llvm::sys::path::parent_path(ModuleFileName);
1237 llvm::sys::fs::create_directories(Dir);
1240 unsigned ModuleLoadCapabilities = ASTReader::ARR_Missing;
1241 llvm::LockFileManager Locked(ModuleFileName);
1243 case llvm::LockFileManager::LFS_Error:
1244 // PCMCache takes care of correctness and locks are only necessary for
1245 // performance. Fallback to building the module in case of any lock
1247 Diags.Report(ModuleNameLoc, diag::remark_module_lock_failure)
1248 << Module->Name << Locked.getErrorMessage();
1249 // Clear out any potential leftover.
1250 Locked.unsafeRemoveLockFile();
1252 case llvm::LockFileManager::LFS_Owned:
1253 // We're responsible for building the module ourselves.
1254 if (!compileModuleImpl(ImportingInstance, ModuleNameLoc, Module,
1256 diagnoseBuildFailure();
1261 case llvm::LockFileManager::LFS_Shared:
1262 // Someone else is responsible for building the module. Wait for them to
1264 switch (Locked.waitForUnlock()) {
1265 case llvm::LockFileManager::Res_Success:
1266 ModuleLoadCapabilities |= ASTReader::ARR_OutOfDate;
1268 case llvm::LockFileManager::Res_OwnerDied:
1269 continue; // try again to get the lock.
1270 case llvm::LockFileManager::Res_Timeout:
1271 // Since PCMCache takes care of correctness, we try waiting for another
1272 // process to complete the build so clang does not do it done twice. If
1273 // case of timeout, build it ourselves.
1274 Diags.Report(ModuleNameLoc, diag::remark_module_lock_timeout)
1276 // Clear the lock file so that future invokations can make progress.
1277 Locked.unsafeRemoveLockFile();
1283 // Try to read the module file, now that we've compiled it.
1284 ASTReader::ASTReadResult ReadResult =
1285 ImportingInstance.getModuleManager()->ReadAST(
1286 ModuleFileName, serialization::MK_ImplicitModule, ImportLoc,
1287 ModuleLoadCapabilities);
1289 if (ReadResult == ASTReader::OutOfDate &&
1290 Locked == llvm::LockFileManager::LFS_Shared) {
1291 // The module may be out of date in the presence of file system races,
1292 // or if one of its imports depends on header search paths that are not
1293 // consistent with this ImportingInstance. Try again...
1295 } else if (ReadResult == ASTReader::Missing) {
1296 diagnoseBuildFailure();
1297 } else if (ReadResult != ASTReader::Success &&
1298 !Diags.hasErrorOccurred()) {
1299 // The ASTReader didn't diagnose the error, so conservatively report it.
1300 diagnoseBuildFailure();
1302 return ReadResult == ASTReader::Success;
1306 /// \brief Diagnose differences between the current definition of the given
1307 /// configuration macro and the definition provided on the command line.
1308 static void checkConfigMacro(Preprocessor &PP, StringRef ConfigMacro,
1309 Module *Mod, SourceLocation ImportLoc) {
1310 IdentifierInfo *Id = PP.getIdentifierInfo(ConfigMacro);
1311 SourceManager &SourceMgr = PP.getSourceManager();
1313 // If this identifier has never had a macro definition, then it could
1314 // not have changed.
1315 if (!Id->hadMacroDefinition())
1317 auto *LatestLocalMD = PP.getLocalMacroDirectiveHistory(Id);
1319 // Find the macro definition from the command line.
1320 MacroInfo *CmdLineDefinition = nullptr;
1321 for (auto *MD = LatestLocalMD; MD; MD = MD->getPrevious()) {
1322 // We only care about the predefines buffer.
1323 FileID FID = SourceMgr.getFileID(MD->getLocation());
1324 if (FID.isInvalid() || FID != PP.getPredefinesFileID())
1326 if (auto *DMD = dyn_cast<DefMacroDirective>(MD))
1327 CmdLineDefinition = DMD->getMacroInfo();
1331 auto *CurrentDefinition = PP.getMacroInfo(Id);
1332 if (CurrentDefinition == CmdLineDefinition) {
1333 // Macro matches. Nothing to do.
1334 } else if (!CurrentDefinition) {
1335 // This macro was defined on the command line, then #undef'd later.
1337 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1338 << true << ConfigMacro << Mod->getFullModuleName();
1339 auto LatestDef = LatestLocalMD->getDefinition();
1340 assert(LatestDef.isUndefined() &&
1341 "predefined macro went away with no #undef?");
1342 PP.Diag(LatestDef.getUndefLocation(), diag::note_module_def_undef_here)
1345 } else if (!CmdLineDefinition) {
1346 // There was no definition for this macro in the predefines buffer,
1347 // but there was a local definition. Complain.
1348 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1349 << false << ConfigMacro << Mod->getFullModuleName();
1350 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1351 diag::note_module_def_undef_here)
1353 } else if (!CurrentDefinition->isIdenticalTo(*CmdLineDefinition, PP,
1354 /*Syntactically=*/true)) {
1355 // The macro definitions differ.
1356 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1357 << false << ConfigMacro << Mod->getFullModuleName();
1358 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1359 diag::note_module_def_undef_here)
1364 /// \brief Write a new timestamp file with the given path.
1365 static void writeTimestampFile(StringRef TimestampFile) {
1367 llvm::raw_fd_ostream Out(TimestampFile.str(), EC, llvm::sys::fs::F_None);
1370 /// \brief Prune the module cache of modules that haven't been accessed in
1372 static void pruneModuleCache(const HeaderSearchOptions &HSOpts) {
1373 struct stat StatBuf;
1374 llvm::SmallString<128> TimestampFile;
1375 TimestampFile = HSOpts.ModuleCachePath;
1376 assert(!TimestampFile.empty());
1377 llvm::sys::path::append(TimestampFile, "modules.timestamp");
1379 // Try to stat() the timestamp file.
1380 if (::stat(TimestampFile.c_str(), &StatBuf)) {
1381 // If the timestamp file wasn't there, create one now.
1382 if (errno == ENOENT) {
1383 writeTimestampFile(TimestampFile);
1388 // Check whether the time stamp is older than our pruning interval.
1389 // If not, do nothing.
1390 time_t TimeStampModTime = StatBuf.st_mtime;
1391 time_t CurrentTime = time(nullptr);
1392 if (CurrentTime - TimeStampModTime <= time_t(HSOpts.ModuleCachePruneInterval))
1395 // Write a new timestamp file so that nobody else attempts to prune.
1396 // There is a benign race condition here, if two Clang instances happen to
1397 // notice at the same time that the timestamp is out-of-date.
1398 writeTimestampFile(TimestampFile);
1400 // Walk the entire module cache, looking for unused module files and module
1403 SmallString<128> ModuleCachePathNative;
1404 llvm::sys::path::native(HSOpts.ModuleCachePath, ModuleCachePathNative);
1405 for (llvm::sys::fs::directory_iterator Dir(ModuleCachePathNative, EC), DirEnd;
1406 Dir != DirEnd && !EC; Dir.increment(EC)) {
1407 // If we don't have a directory, there's nothing to look into.
1408 if (!llvm::sys::fs::is_directory(Dir->path()))
1411 // Walk all of the files within this directory.
1412 for (llvm::sys::fs::directory_iterator File(Dir->path(), EC), FileEnd;
1413 File != FileEnd && !EC; File.increment(EC)) {
1414 // We only care about module and global module index files.
1415 StringRef Extension = llvm::sys::path::extension(File->path());
1416 if (Extension != ".pcm" && Extension != ".timestamp" &&
1417 llvm::sys::path::filename(File->path()) != "modules.idx")
1420 // Look at this file. If we can't stat it, there's nothing interesting
1422 if (::stat(File->path().c_str(), &StatBuf))
1425 // If the file has been used recently enough, leave it there.
1426 time_t FileAccessTime = StatBuf.st_atime;
1427 if (CurrentTime - FileAccessTime <=
1428 time_t(HSOpts.ModuleCachePruneAfter)) {
1433 llvm::sys::fs::remove(File->path());
1435 // Remove the timestamp file.
1436 std::string TimpestampFilename = File->path() + ".timestamp";
1437 llvm::sys::fs::remove(TimpestampFilename);
1440 // If we removed all of the files in the directory, remove the directory
1442 if (llvm::sys::fs::directory_iterator(Dir->path(), EC) ==
1443 llvm::sys::fs::directory_iterator() && !EC)
1444 llvm::sys::fs::remove(Dir->path());
1448 void CompilerInstance::createModuleManager() {
1449 if (!ModuleManager) {
1450 if (!hasASTContext())
1453 // If we're implicitly building modules but not currently recursively
1454 // building a module, check whether we need to prune the module cache.
1455 if (getSourceManager().getModuleBuildStack().empty() &&
1456 !getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty() &&
1457 getHeaderSearchOpts().ModuleCachePruneInterval > 0 &&
1458 getHeaderSearchOpts().ModuleCachePruneAfter > 0) {
1459 pruneModuleCache(getHeaderSearchOpts());
1462 HeaderSearchOptions &HSOpts = getHeaderSearchOpts();
1463 std::string Sysroot = HSOpts.Sysroot;
1464 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
1465 std::unique_ptr<llvm::Timer> ReadTimer;
1466 if (FrontendTimerGroup)
1467 ReadTimer = llvm::make_unique<llvm::Timer>("reading_modules",
1469 *FrontendTimerGroup);
1470 ModuleManager = new ASTReader(
1471 getPreprocessor(), getASTContext(), getPCHContainerReader(),
1472 getFrontendOpts().ModuleFileExtensions,
1473 Sysroot.empty() ? "" : Sysroot.c_str(), PPOpts.DisablePCHValidation,
1474 /*AllowASTWithCompilerErrors=*/false,
1475 /*AllowConfigurationMismatch=*/false,
1476 HSOpts.ModulesValidateSystemHeaders,
1477 getFrontendOpts().UseGlobalModuleIndex,
1478 std::move(ReadTimer));
1479 if (hasASTConsumer()) {
1480 ModuleManager->setDeserializationListener(
1481 getASTConsumer().GetASTDeserializationListener());
1482 getASTContext().setASTMutationListener(
1483 getASTConsumer().GetASTMutationListener());
1485 getASTContext().setExternalSource(ModuleManager);
1487 ModuleManager->InitializeSema(getSema());
1488 if (hasASTConsumer())
1489 ModuleManager->StartTranslationUnit(&getASTConsumer());
1491 if (TheDependencyFileGenerator)
1492 TheDependencyFileGenerator->AttachToASTReader(*ModuleManager);
1493 for (auto &Listener : DependencyCollectors)
1494 Listener->attachToASTReader(*ModuleManager);
1498 bool CompilerInstance::loadModuleFile(StringRef FileName) {
1500 if (FrontendTimerGroup)
1501 Timer.init("preloading." + FileName.str(), "Preloading " + FileName.str(),
1502 *FrontendTimerGroup);
1503 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1505 // Helper to recursively read the module names for all modules we're adding.
1506 // We mark these as known and redirect any attempt to load that module to
1507 // the files we were handed.
1508 struct ReadModuleNames : ASTReaderListener {
1509 CompilerInstance &CI;
1510 llvm::SmallVector<IdentifierInfo*, 8> LoadedModules;
1512 ReadModuleNames(CompilerInstance &CI) : CI(CI) {}
1514 void ReadModuleName(StringRef ModuleName) override {
1515 LoadedModules.push_back(
1516 CI.getPreprocessor().getIdentifierInfo(ModuleName));
1519 void registerAll() {
1520 for (auto *II : LoadedModules) {
1521 CI.KnownModules[II] = CI.getPreprocessor()
1522 .getHeaderSearchInfo()
1524 .findModule(II->getName());
1526 LoadedModules.clear();
1529 void markAllUnavailable() {
1530 for (auto *II : LoadedModules) {
1531 if (Module *M = CI.getPreprocessor()
1532 .getHeaderSearchInfo()
1534 .findModule(II->getName())) {
1535 M->HasIncompatibleModuleFile = true;
1537 // Mark module as available if the only reason it was unavailable
1538 // was missing headers.
1539 SmallVector<Module *, 2> Stack;
1541 while (!Stack.empty()) {
1542 Module *Current = Stack.pop_back_val();
1543 if (Current->IsMissingRequirement) continue;
1544 Current->IsAvailable = true;
1545 Stack.insert(Stack.end(),
1546 Current->submodule_begin(), Current->submodule_end());
1550 LoadedModules.clear();
1554 // If we don't already have an ASTReader, create one now.
1556 createModuleManager();
1558 auto Listener = llvm::make_unique<ReadModuleNames>(*this);
1559 auto &ListenerRef = *Listener;
1560 ASTReader::ListenerScope ReadModuleNamesListener(*ModuleManager,
1561 std::move(Listener));
1563 // Try to load the module file.
1564 switch (ModuleManager->ReadAST(FileName, serialization::MK_ExplicitModule,
1566 ASTReader::ARR_ConfigurationMismatch)) {
1567 case ASTReader::Success:
1568 // We successfully loaded the module file; remember the set of provided
1569 // modules so that we don't try to load implicit modules for them.
1570 ListenerRef.registerAll();
1573 case ASTReader::ConfigurationMismatch:
1574 // Ignore unusable module files.
1575 getDiagnostics().Report(SourceLocation(), diag::warn_module_config_mismatch)
1577 // All modules provided by any files we tried and failed to load are now
1578 // unavailable; includes of those modules should now be handled textually.
1579 ListenerRef.markAllUnavailable();
1588 CompilerInstance::loadModule(SourceLocation ImportLoc,
1590 Module::NameVisibilityKind Visibility,
1591 bool IsInclusionDirective) {
1592 // Determine what file we're searching from.
1593 StringRef ModuleName = Path[0].first->getName();
1594 SourceLocation ModuleNameLoc = Path[0].second;
1596 // If we've already handled this import, just return the cached result.
1597 // This one-element cache is important to eliminate redundant diagnostics
1598 // when both the preprocessor and parser see the same import declaration.
1599 if (ImportLoc.isValid() && LastModuleImportLoc == ImportLoc) {
1600 // Make the named module visible.
1601 if (LastModuleImportResult && ModuleName != getLangOpts().CurrentModule)
1602 ModuleManager->makeModuleVisible(LastModuleImportResult, Visibility,
1604 return LastModuleImportResult;
1607 clang::Module *Module = nullptr;
1609 // If we don't already have information on this module, load the module now.
1610 llvm::DenseMap<const IdentifierInfo *, clang::Module *>::iterator Known
1611 = KnownModules.find(Path[0].first);
1612 if (Known != KnownModules.end()) {
1613 // Retrieve the cached top-level module.
1614 Module = Known->second;
1615 } else if (ModuleName == getLangOpts().CurrentModule) {
1616 // This is the module we're building.
1617 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1618 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1620 // Search for a module with the given name.
1621 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1622 HeaderSearchOptions &HSOpts =
1623 PP->getHeaderSearchInfo().getHeaderSearchOpts();
1625 std::string ModuleFileName;
1627 ModuleNotFound, ModuleCache, PrebuiltModulePath, ModuleBuildPragma
1628 } Source = ModuleNotFound;
1630 // Check to see if the module has been built as part of this compilation
1631 // via a module build pragma.
1632 auto BuiltModuleIt = BuiltModules.find(ModuleName);
1633 if (BuiltModuleIt != BuiltModules.end()) {
1634 ModuleFileName = BuiltModuleIt->second;
1635 Source = ModuleBuildPragma;
1638 // Try to load the module from the prebuilt module path.
1639 if (Source == ModuleNotFound && !HSOpts.PrebuiltModulePaths.empty()) {
1640 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(
1641 ModuleName, "", /*UsePrebuiltPath*/ true);
1642 if (!ModuleFileName.empty())
1643 Source = PrebuiltModulePath;
1646 // Try to load the module from the module cache.
1647 if (Source == ModuleNotFound && Module) {
1648 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(Module);
1649 Source = ModuleCache;
1652 if (Source == ModuleNotFound) {
1653 // We can't find a module, error out here.
1654 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_found)
1655 << ModuleName << SourceRange(ImportLoc, ModuleNameLoc);
1656 ModuleBuildFailed = true;
1657 return ModuleLoadResult();
1660 if (ModuleFileName.empty()) {
1661 if (Module && Module->HasIncompatibleModuleFile) {
1662 // We tried and failed to load a module file for this module. Fall
1663 // back to textual inclusion for its headers.
1664 return ModuleLoadResult::ConfigMismatch;
1667 getDiagnostics().Report(ModuleNameLoc, diag::err_module_build_disabled)
1669 ModuleBuildFailed = true;
1670 return ModuleLoadResult();
1673 // If we don't already have an ASTReader, create one now.
1675 createModuleManager();
1678 if (FrontendTimerGroup)
1679 Timer.init("loading." + ModuleFileName, "Loading " + ModuleFileName,
1680 *FrontendTimerGroup);
1681 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1683 // Try to load the module file. If we are not trying to load from the
1684 // module cache, we don't know how to rebuild modules.
1685 unsigned ARRFlags = Source == ModuleCache ?
1686 ASTReader::ARR_OutOfDate | ASTReader::ARR_Missing :
1687 ASTReader::ARR_ConfigurationMismatch;
1688 switch (ModuleManager->ReadAST(ModuleFileName,
1689 Source == PrebuiltModulePath
1690 ? serialization::MK_PrebuiltModule
1691 : Source == ModuleBuildPragma
1692 ? serialization::MK_ExplicitModule
1693 : serialization::MK_ImplicitModule,
1694 ImportLoc, ARRFlags)) {
1695 case ASTReader::Success: {
1696 if (Source != ModuleCache && !Module) {
1697 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1698 if (!Module || !Module->getASTFile() ||
1699 FileMgr->getFile(ModuleFileName) != Module->getASTFile()) {
1700 // Error out if Module does not refer to the file in the prebuilt
1702 getDiagnostics().Report(ModuleNameLoc, diag::err_module_prebuilt)
1704 ModuleBuildFailed = true;
1705 KnownModules[Path[0].first] = nullptr;
1706 return ModuleLoadResult();
1712 case ASTReader::OutOfDate:
1713 case ASTReader::Missing: {
1714 if (Source != ModuleCache) {
1715 // We don't know the desired configuration for this module and don't
1716 // necessarily even have a module map. Since ReadAST already produces
1717 // diagnostics for these two cases, we simply error out here.
1718 ModuleBuildFailed = true;
1719 KnownModules[Path[0].first] = nullptr;
1720 return ModuleLoadResult();
1723 // The module file is missing or out-of-date. Build it.
1724 assert(Module && "missing module file");
1725 // Check whether there is a cycle in the module graph.
1726 ModuleBuildStack ModPath = getSourceManager().getModuleBuildStack();
1727 ModuleBuildStack::iterator Pos = ModPath.begin(), PosEnd = ModPath.end();
1728 for (; Pos != PosEnd; ++Pos) {
1729 if (Pos->first == ModuleName)
1733 if (Pos != PosEnd) {
1734 SmallString<256> CyclePath;
1735 for (; Pos != PosEnd; ++Pos) {
1736 CyclePath += Pos->first;
1737 CyclePath += " -> ";
1739 CyclePath += ModuleName;
1741 getDiagnostics().Report(ModuleNameLoc, diag::err_module_cycle)
1742 << ModuleName << CyclePath;
1743 return ModuleLoadResult();
1746 // Check whether we have already attempted to build this module (but
1748 if (getPreprocessorOpts().FailedModules &&
1749 getPreprocessorOpts().FailedModules->hasAlreadyFailed(ModuleName)) {
1750 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_built)
1752 << SourceRange(ImportLoc, ModuleNameLoc);
1753 ModuleBuildFailed = true;
1754 return ModuleLoadResult();
1757 // Try to compile and then load the module.
1758 if (!compileAndLoadModule(*this, ImportLoc, ModuleNameLoc, Module,
1760 assert(getDiagnostics().hasErrorOccurred() &&
1761 "undiagnosed error in compileAndLoadModule");
1762 if (getPreprocessorOpts().FailedModules)
1763 getPreprocessorOpts().FailedModules->addFailed(ModuleName);
1764 KnownModules[Path[0].first] = nullptr;
1765 ModuleBuildFailed = true;
1766 return ModuleLoadResult();
1769 // Okay, we've rebuilt and now loaded the module.
1773 case ASTReader::ConfigurationMismatch:
1774 if (Source == PrebuiltModulePath)
1775 // FIXME: We shouldn't be setting HadFatalFailure below if we only
1776 // produce a warning here!
1777 getDiagnostics().Report(SourceLocation(),
1778 diag::warn_module_config_mismatch)
1780 // Fall through to error out.
1782 case ASTReader::VersionMismatch:
1783 case ASTReader::HadErrors:
1784 ModuleLoader::HadFatalFailure = true;
1785 // FIXME: The ASTReader will already have complained, but can we shoehorn
1786 // that diagnostic information into a more useful form?
1787 KnownModules[Path[0].first] = nullptr;
1788 return ModuleLoadResult();
1790 case ASTReader::Failure:
1791 ModuleLoader::HadFatalFailure = true;
1792 // Already complained, but note now that we failed.
1793 KnownModules[Path[0].first] = nullptr;
1794 ModuleBuildFailed = true;
1795 return ModuleLoadResult();
1798 // Cache the result of this top-level module lookup for later.
1799 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1802 // If we never found the module, fail.
1804 return ModuleLoadResult();
1806 // Verify that the rest of the module path actually corresponds to
1808 if (Path.size() > 1) {
1809 for (unsigned I = 1, N = Path.size(); I != N; ++I) {
1810 StringRef Name = Path[I].first->getName();
1811 clang::Module *Sub = Module->findSubmodule(Name);
1814 // Attempt to perform typo correction to find a module name that works.
1815 SmallVector<StringRef, 2> Best;
1816 unsigned BestEditDistance = (std::numeric_limits<unsigned>::max)();
1818 for (clang::Module::submodule_iterator J = Module->submodule_begin(),
1819 JEnd = Module->submodule_end();
1821 unsigned ED = Name.edit_distance((*J)->Name,
1822 /*AllowReplacements=*/true,
1824 if (ED <= BestEditDistance) {
1825 if (ED < BestEditDistance) {
1827 BestEditDistance = ED;
1830 Best.push_back((*J)->Name);
1834 // If there was a clear winner, user it.
1835 if (Best.size() == 1) {
1836 getDiagnostics().Report(Path[I].second,
1837 diag::err_no_submodule_suggest)
1838 << Path[I].first << Module->getFullModuleName() << Best[0]
1839 << SourceRange(Path[0].second, Path[I-1].second)
1840 << FixItHint::CreateReplacement(SourceRange(Path[I].second),
1843 Sub = Module->findSubmodule(Best[0]);
1848 // No submodule by this name. Complain, and don't look for further
1850 getDiagnostics().Report(Path[I].second, diag::err_no_submodule)
1851 << Path[I].first << Module->getFullModuleName()
1852 << SourceRange(Path[0].second, Path[I-1].second);
1860 // Make the named module visible, if it's not already part of the module
1862 if (ModuleName != getLangOpts().CurrentModule) {
1863 if (!Module->IsFromModuleFile) {
1864 // We have an umbrella header or directory that doesn't actually include
1865 // all of the headers within the directory it covers. Complain about
1866 // this missing submodule and recover by forgetting that we ever saw
1868 // FIXME: Should we detect this at module load time? It seems fairly
1869 // expensive (and rare).
1870 getDiagnostics().Report(ImportLoc, diag::warn_missing_submodule)
1871 << Module->getFullModuleName()
1872 << SourceRange(Path.front().second, Path.back().second);
1874 return ModuleLoadResult::MissingExpected;
1877 // Check whether this module is available.
1878 if (Preprocessor::checkModuleIsAvailable(getLangOpts(), getTarget(),
1879 getDiagnostics(), Module)) {
1880 getDiagnostics().Report(ImportLoc, diag::note_module_import_here)
1881 << SourceRange(Path.front().second, Path.back().second);
1882 LastModuleImportLoc = ImportLoc;
1883 LastModuleImportResult = ModuleLoadResult();
1884 return ModuleLoadResult();
1887 ModuleManager->makeModuleVisible(Module, Visibility, ImportLoc);
1890 // Check for any configuration macros that have changed.
1891 clang::Module *TopModule = Module->getTopLevelModule();
1892 for (unsigned I = 0, N = TopModule->ConfigMacros.size(); I != N; ++I) {
1893 checkConfigMacro(getPreprocessor(), TopModule->ConfigMacros[I],
1897 LastModuleImportLoc = ImportLoc;
1898 LastModuleImportResult = ModuleLoadResult(Module);
1899 return LastModuleImportResult;
1902 void CompilerInstance::loadModuleFromSource(SourceLocation ImportLoc,
1903 StringRef ModuleName,
1905 // FIXME: Using a randomized filename here means that our intermediate .pcm
1906 // output is nondeterministic (as .pcm files refer to each other by name).
1907 // Can this affect the output in any way?
1908 SmallString<128> ModuleFileName;
1909 if (std::error_code EC = llvm::sys::fs::createTemporaryFile(
1910 ModuleName, "pcm", ModuleFileName)) {
1911 getDiagnostics().Report(ImportLoc, diag::err_fe_unable_to_open_output)
1912 << ModuleFileName << EC.message();
1915 std::string ModuleMapFileName = (ModuleName + ".map").str();
1917 FrontendInputFile Input(
1919 InputKind(getLanguageFromOptions(*Invocation->getLangOpts()),
1920 InputKind::ModuleMap, /*Preprocessed*/true));
1922 std::string NullTerminatedSource(Source.str());
1924 auto PreBuildStep = [&](CompilerInstance &Other) {
1925 // Create a virtual file containing our desired source.
1926 // FIXME: We shouldn't need to do this.
1927 const FileEntry *ModuleMapFile = Other.getFileManager().getVirtualFile(
1928 ModuleMapFileName, NullTerminatedSource.size(), 0);
1929 Other.getSourceManager().overrideFileContents(
1931 llvm::MemoryBuffer::getMemBuffer(NullTerminatedSource.c_str()));
1933 Other.BuiltModules = std::move(BuiltModules);
1934 Other.DeleteBuiltModules = false;
1937 auto PostBuildStep = [this](CompilerInstance &Other) {
1938 BuiltModules = std::move(Other.BuiltModules);
1941 // Build the module, inheriting any modules that we've built locally.
1942 if (compileModuleImpl(*this, ImportLoc, ModuleName, Input, StringRef(),
1943 ModuleFileName, PreBuildStep, PostBuildStep)) {
1944 BuiltModules[ModuleName] = ModuleFileName.str();
1945 llvm::sys::RemoveFileOnSignal(ModuleFileName);
1949 void CompilerInstance::makeModuleVisible(Module *Mod,
1950 Module::NameVisibilityKind Visibility,
1951 SourceLocation ImportLoc) {
1953 createModuleManager();
1957 ModuleManager->makeModuleVisible(Mod, Visibility, ImportLoc);
1960 GlobalModuleIndex *CompilerInstance::loadGlobalModuleIndex(
1961 SourceLocation TriggerLoc) {
1962 if (getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty())
1965 createModuleManager();
1966 // Can't do anything if we don't have the module manager.
1969 // Get an existing global index. This loads it if not already
1971 ModuleManager->loadGlobalIndex();
1972 GlobalModuleIndex *GlobalIndex = ModuleManager->getGlobalIndex();
1973 // If the global index doesn't exist, create it.
1974 if (!GlobalIndex && shouldBuildGlobalModuleIndex() && hasFileManager() &&
1975 hasPreprocessor()) {
1976 llvm::sys::fs::create_directories(
1977 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1978 GlobalModuleIndex::writeIndex(
1979 getFileManager(), getPCHContainerReader(),
1980 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1981 ModuleManager->resetForReload();
1982 ModuleManager->loadGlobalIndex();
1983 GlobalIndex = ModuleManager->getGlobalIndex();
1985 // For finding modules needing to be imported for fixit messages,
1986 // we need to make the global index cover all modules, so we do that here.
1987 if (!HaveFullGlobalModuleIndex && GlobalIndex && !buildingModule()) {
1988 ModuleMap &MMap = getPreprocessor().getHeaderSearchInfo().getModuleMap();
1989 bool RecreateIndex = false;
1990 for (ModuleMap::module_iterator I = MMap.module_begin(),
1991 E = MMap.module_end(); I != E; ++I) {
1992 Module *TheModule = I->second;
1993 const FileEntry *Entry = TheModule->getASTFile();
1995 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
1996 Path.push_back(std::make_pair(
1997 getPreprocessor().getIdentifierInfo(TheModule->Name), TriggerLoc));
1998 std::reverse(Path.begin(), Path.end());
1999 // Load a module as hidden. This also adds it to the global index.
2000 loadModule(TheModule->DefinitionLoc, Path, Module::Hidden, false);
2001 RecreateIndex = true;
2004 if (RecreateIndex) {
2005 GlobalModuleIndex::writeIndex(
2006 getFileManager(), getPCHContainerReader(),
2007 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
2008 ModuleManager->resetForReload();
2009 ModuleManager->loadGlobalIndex();
2010 GlobalIndex = ModuleManager->getGlobalIndex();
2012 HaveFullGlobalModuleIndex = true;
2017 // Check global module index for missing imports.
2019 CompilerInstance::lookupMissingImports(StringRef Name,
2020 SourceLocation TriggerLoc) {
2021 // Look for the symbol in non-imported modules, but only if an error
2022 // actually occurred.
2023 if (!buildingModule()) {
2024 // Load global module index, or retrieve a previously loaded one.
2025 GlobalModuleIndex *GlobalIndex = loadGlobalModuleIndex(
2028 // Only if we have a global index.
2030 GlobalModuleIndex::HitSet FoundModules;
2032 // Find the modules that reference the identifier.
2033 // Note that this only finds top-level modules.
2034 // We'll let diagnoseTypo find the actual declaration module.
2035 if (GlobalIndex->lookupIdentifier(Name, FoundModules))
2042 void CompilerInstance::resetAndLeakSema() { BuryPointer(takeSema()); }
2044 void CompilerInstance::setExternalSemaSource(
2045 IntrusiveRefCntPtr<ExternalSemaSource> ESS) {
2046 ExternalSemaSrc = std::move(ESS);