1 //===--- CompilerInstance.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 10 #include "clang/Frontend/CompilerInstance.h" 11 #include "clang/Sema/Sema.h" 12 #include "clang/AST/ASTConsumer.h" 13 #include "clang/AST/ASTContext.h" 14 #include "clang/Basic/Diagnostic.h" 15 #include "clang/Basic/FileManager.h" 16 #include "clang/Basic/SourceManager.h" 17 #include "clang/Basic/TargetInfo.h" 18 #include "clang/Basic/Version.h" 19 #include "clang/Lex/HeaderSearch.h" 20 #include "clang/Lex/Preprocessor.h" 21 #include "clang/Lex/PTHManager.h" 22 #include "clang/Frontend/ChainedDiagnosticClient.h" 23 #include "clang/Frontend/FrontendAction.h" 24 #include "clang/Frontend/FrontendActions.h" 25 #include "clang/Frontend/FrontendDiagnostic.h" 26 #include "clang/Frontend/LogDiagnosticPrinter.h" 27 #include "clang/Frontend/TextDiagnosticPrinter.h" 28 #include "clang/Frontend/VerifyDiagnosticsClient.h" 29 #include "clang/Frontend/Utils.h" 30 #include "clang/Serialization/ASTReader.h" 31 #include "clang/Sema/CodeCompleteConsumer.h" 32 #include "llvm/Support/FileSystem.h" 33 #include "llvm/Support/MemoryBuffer.h" 34 #include "llvm/Support/raw_ostream.h" 35 #include "llvm/ADT/Statistic.h" 36 #include "llvm/Support/Timer.h" 37 #include "llvm/Support/Host.h" 38 #include "llvm/Support/Path.h" 39 #include "llvm/Support/Program.h" 40 #include "llvm/Support/Signals.h" 41 #include "llvm/Support/system_error.h" 42 #include "llvm/Config/config.h" 43 using namespace clang; 44 45 CompilerInstance::CompilerInstance() 46 : Invocation(new CompilerInvocation()), ModuleManager(0) { 47 } 48 49 CompilerInstance::~CompilerInstance() { 50 } 51 52 void CompilerInstance::setInvocation(CompilerInvocation *Value) { 53 Invocation = Value; 54 } 55 56 void CompilerInstance::setDiagnostics(Diagnostic *Value) { 57 Diagnostics = Value; 58 } 59 60 void CompilerInstance::setTarget(TargetInfo *Value) { 61 Target = Value; 62 } 63 64 void CompilerInstance::setFileManager(FileManager *Value) { 65 FileMgr = Value; 66 } 67 68 void CompilerInstance::setSourceManager(SourceManager *Value) { 69 SourceMgr = Value; 70 } 71 72 void CompilerInstance::setPreprocessor(Preprocessor *Value) { PP = Value; } 73 74 void CompilerInstance::setASTContext(ASTContext *Value) { Context = Value; } 75 76 void CompilerInstance::setSema(Sema *S) { 77 TheSema.reset(S); 78 } 79 80 void CompilerInstance::setASTConsumer(ASTConsumer *Value) { 81 Consumer.reset(Value); 82 } 83 84 void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) { 85 CompletionConsumer.reset(Value); 86 } 87 88 // Diagnostics 89 static void SetUpBuildDumpLog(const DiagnosticOptions &DiagOpts, 90 unsigned argc, const char* const *argv, 91 Diagnostic &Diags) { 92 std::string ErrorInfo; 93 llvm::OwningPtr<raw_ostream> OS( 94 new llvm::raw_fd_ostream(DiagOpts.DumpBuildInformation.c_str(), ErrorInfo)); 95 if (!ErrorInfo.empty()) { 96 Diags.Report(diag::err_fe_unable_to_open_logfile) 97 << DiagOpts.DumpBuildInformation << ErrorInfo; 98 return; 99 } 100 101 (*OS) << "clang -cc1 command line arguments: "; 102 for (unsigned i = 0; i != argc; ++i) 103 (*OS) << argv[i] << ' '; 104 (*OS) << '\n'; 105 106 // Chain in a diagnostic client which will log the diagnostics. 107 DiagnosticClient *Logger = 108 new TextDiagnosticPrinter(*OS.take(), DiagOpts, /*OwnsOutputStream=*/true); 109 Diags.setClient(new ChainedDiagnosticClient(Diags.takeClient(), Logger)); 110 } 111 112 static void SetUpDiagnosticLog(const DiagnosticOptions &DiagOpts, 113 const CodeGenOptions *CodeGenOpts, 114 Diagnostic &Diags) { 115 std::string ErrorInfo; 116 bool OwnsStream = false; 117 raw_ostream *OS = &llvm::errs(); 118 if (DiagOpts.DiagnosticLogFile != "-") { 119 // Create the output stream. 120 llvm::raw_fd_ostream *FileOS( 121 new llvm::raw_fd_ostream(DiagOpts.DiagnosticLogFile.c_str(), 122 ErrorInfo, llvm::raw_fd_ostream::F_Append)); 123 if (!ErrorInfo.empty()) { 124 Diags.Report(diag::warn_fe_cc_log_diagnostics_failure) 125 << DiagOpts.DumpBuildInformation << ErrorInfo; 126 } else { 127 FileOS->SetUnbuffered(); 128 FileOS->SetUseAtomicWrites(true); 129 OS = FileOS; 130 OwnsStream = true; 131 } 132 } 133 134 // Chain in the diagnostic client which will log the diagnostics. 135 LogDiagnosticPrinter *Logger = new LogDiagnosticPrinter(*OS, DiagOpts, 136 OwnsStream); 137 if (CodeGenOpts) 138 Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags); 139 Diags.setClient(new ChainedDiagnosticClient(Diags.takeClient(), Logger)); 140 } 141 142 void CompilerInstance::createDiagnostics(int Argc, const char* const *Argv, 143 DiagnosticClient *Client, 144 bool ShouldOwnClient) { 145 Diagnostics = createDiagnostics(getDiagnosticOpts(), Argc, Argv, Client, 146 ShouldOwnClient, &getCodeGenOpts()); 147 } 148 149 llvm::IntrusiveRefCntPtr<Diagnostic> 150 CompilerInstance::createDiagnostics(const DiagnosticOptions &Opts, 151 int Argc, const char* const *Argv, 152 DiagnosticClient *Client, 153 bool ShouldOwnClient, 154 const CodeGenOptions *CodeGenOpts) { 155 llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 156 llvm::IntrusiveRefCntPtr<Diagnostic> Diags(new Diagnostic(DiagID)); 157 158 // Create the diagnostic client for reporting errors or for 159 // implementing -verify. 160 if (Client) 161 Diags->setClient(Client, ShouldOwnClient); 162 else 163 Diags->setClient(new TextDiagnosticPrinter(llvm::errs(), Opts)); 164 165 // Chain in -verify checker, if requested. 166 if (Opts.VerifyDiagnostics) 167 Diags->setClient(new VerifyDiagnosticsClient(*Diags)); 168 169 // Chain in -diagnostic-log-file dumper, if requested. 170 if (!Opts.DiagnosticLogFile.empty()) 171 SetUpDiagnosticLog(Opts, CodeGenOpts, *Diags); 172 173 if (!Opts.DumpBuildInformation.empty()) 174 SetUpBuildDumpLog(Opts, Argc, Argv, *Diags); 175 176 // Configure our handling of diagnostics. 177 ProcessWarningOptions(*Diags, Opts); 178 179 return Diags; 180 } 181 182 // File Manager 183 184 void CompilerInstance::createFileManager() { 185 FileMgr = new FileManager(getFileSystemOpts()); 186 } 187 188 // Source Manager 189 190 void CompilerInstance::createSourceManager(FileManager &FileMgr) { 191 SourceMgr = new SourceManager(getDiagnostics(), FileMgr); 192 } 193 194 // Preprocessor 195 196 void CompilerInstance::createPreprocessor() { 197 const PreprocessorOptions &PPOpts = getPreprocessorOpts(); 198 199 // Create a PTH manager if we are using some form of a token cache. 200 PTHManager *PTHMgr = 0; 201 if (!PPOpts.TokenCache.empty()) 202 PTHMgr = PTHManager::Create(PPOpts.TokenCache, getDiagnostics()); 203 204 // Create the Preprocessor. 205 HeaderSearch *HeaderInfo = new HeaderSearch(getFileManager()); 206 PP = new Preprocessor(getDiagnostics(), getLangOpts(), &getTarget(), 207 getSourceManager(), *HeaderInfo, *this, PTHMgr, 208 /*OwnsHeaderSearch=*/true); 209 210 // Note that this is different then passing PTHMgr to Preprocessor's ctor. 211 // That argument is used as the IdentifierInfoLookup argument to 212 // IdentifierTable's ctor. 213 if (PTHMgr) { 214 PTHMgr->setPreprocessor(&*PP); 215 PP->setPTHManager(PTHMgr); 216 } 217 218 if (PPOpts.DetailedRecord) 219 PP->createPreprocessingRecord( 220 PPOpts.DetailedRecordIncludesNestedMacroExpansions); 221 222 InitializePreprocessor(*PP, PPOpts, getHeaderSearchOpts(), getFrontendOpts()); 223 224 // Handle generating dependencies, if requested. 225 const DependencyOutputOptions &DepOpts = getDependencyOutputOpts(); 226 if (!DepOpts.OutputFile.empty()) 227 AttachDependencyFileGen(*PP, DepOpts); 228 229 // Handle generating header include information, if requested. 230 if (DepOpts.ShowHeaderIncludes) 231 AttachHeaderIncludeGen(*PP); 232 if (!DepOpts.HeaderIncludeOutputFile.empty()) { 233 StringRef OutputPath = DepOpts.HeaderIncludeOutputFile; 234 if (OutputPath == "-") 235 OutputPath = ""; 236 AttachHeaderIncludeGen(*PP, /*ShowAllHeaders=*/true, OutputPath, 237 /*ShowDepth=*/false); 238 } 239 } 240 241 // ASTContext 242 243 void CompilerInstance::createASTContext() { 244 Preprocessor &PP = getPreprocessor(); 245 Context = new ASTContext(getLangOpts(), PP.getSourceManager(), 246 &getTarget(), PP.getIdentifierTable(), 247 PP.getSelectorTable(), PP.getBuiltinInfo(), 248 /*size_reserve=*/ 0); 249 } 250 251 // ExternalASTSource 252 253 void CompilerInstance::createPCHExternalASTSource(StringRef Path, 254 bool DisablePCHValidation, 255 bool DisableStatCache, 256 void *DeserializationListener){ 257 llvm::OwningPtr<ExternalASTSource> Source; 258 bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0; 259 Source.reset(createPCHExternalASTSource(Path, getHeaderSearchOpts().Sysroot, 260 DisablePCHValidation, 261 DisableStatCache, 262 getPreprocessor(), getASTContext(), 263 DeserializationListener, 264 Preamble)); 265 ModuleManager = static_cast<ASTReader*>(Source.get()); 266 getASTContext().setExternalSource(Source); 267 } 268 269 ExternalASTSource * 270 CompilerInstance::createPCHExternalASTSource(StringRef Path, 271 const std::string &Sysroot, 272 bool DisablePCHValidation, 273 bool DisableStatCache, 274 Preprocessor &PP, 275 ASTContext &Context, 276 void *DeserializationListener, 277 bool Preamble) { 278 llvm::OwningPtr<ASTReader> Reader; 279 Reader.reset(new ASTReader(PP, Context, 280 Sysroot.empty() ? "" : Sysroot.c_str(), 281 DisablePCHValidation, DisableStatCache)); 282 283 Reader->setDeserializationListener( 284 static_cast<ASTDeserializationListener *>(DeserializationListener)); 285 switch (Reader->ReadAST(Path, 286 Preamble ? serialization::MK_Preamble 287 : serialization::MK_PCH)) { 288 case ASTReader::Success: 289 // Set the predefines buffer as suggested by the PCH reader. Typically, the 290 // predefines buffer will be empty. 291 PP.setPredefines(Reader->getSuggestedPredefines()); 292 return Reader.take(); 293 294 case ASTReader::Failure: 295 // Unrecoverable failure: don't even try to process the input file. 296 break; 297 298 case ASTReader::IgnorePCH: 299 // No suitable PCH file could be found. Return an error. 300 break; 301 } 302 303 return 0; 304 } 305 306 // Code Completion 307 308 static bool EnableCodeCompletion(Preprocessor &PP, 309 const std::string &Filename, 310 unsigned Line, 311 unsigned Column) { 312 // Tell the source manager to chop off the given file at a specific 313 // line and column. 314 const FileEntry *Entry = PP.getFileManager().getFile(Filename); 315 if (!Entry) { 316 PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file) 317 << Filename; 318 return true; 319 } 320 321 // Truncate the named file at the given line/column. 322 PP.SetCodeCompletionPoint(Entry, Line, Column); 323 return false; 324 } 325 326 void CompilerInstance::createCodeCompletionConsumer() { 327 const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt; 328 if (!CompletionConsumer) { 329 CompletionConsumer.reset( 330 createCodeCompletionConsumer(getPreprocessor(), 331 Loc.FileName, Loc.Line, Loc.Column, 332 getFrontendOpts().ShowMacrosInCodeCompletion, 333 getFrontendOpts().ShowCodePatternsInCodeCompletion, 334 getFrontendOpts().ShowGlobalSymbolsInCodeCompletion, 335 llvm::outs())); 336 if (!CompletionConsumer) 337 return; 338 } else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName, 339 Loc.Line, Loc.Column)) { 340 CompletionConsumer.reset(); 341 return; 342 } 343 344 if (CompletionConsumer->isOutputBinary() && 345 llvm::sys::Program::ChangeStdoutToBinary()) { 346 getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary); 347 CompletionConsumer.reset(); 348 } 349 } 350 351 void CompilerInstance::createFrontendTimer() { 352 FrontendTimer.reset(new llvm::Timer("Clang front-end timer")); 353 } 354 355 CodeCompleteConsumer * 356 CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP, 357 const std::string &Filename, 358 unsigned Line, 359 unsigned Column, 360 bool ShowMacros, 361 bool ShowCodePatterns, 362 bool ShowGlobals, 363 raw_ostream &OS) { 364 if (EnableCodeCompletion(PP, Filename, Line, Column)) 365 return 0; 366 367 // Set up the creation routine for code-completion. 368 return new PrintingCodeCompleteConsumer(ShowMacros, ShowCodePatterns, 369 ShowGlobals, OS); 370 } 371 372 void CompilerInstance::createSema(TranslationUnitKind TUKind, 373 CodeCompleteConsumer *CompletionConsumer) { 374 TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(), 375 TUKind, CompletionConsumer)); 376 } 377 378 // Output Files 379 380 void CompilerInstance::addOutputFile(const OutputFile &OutFile) { 381 assert(OutFile.OS && "Attempt to add empty stream to output list!"); 382 OutputFiles.push_back(OutFile); 383 } 384 385 void CompilerInstance::clearOutputFiles(bool EraseFiles) { 386 for (std::list<OutputFile>::iterator 387 it = OutputFiles.begin(), ie = OutputFiles.end(); it != ie; ++it) { 388 delete it->OS; 389 if (!it->TempFilename.empty()) { 390 if (EraseFiles) { 391 bool existed; 392 llvm::sys::fs::remove(it->TempFilename, existed); 393 } else { 394 llvm::SmallString<128> NewOutFile(it->Filename); 395 396 // If '-working-directory' was passed, the output filename should be 397 // relative to that. 398 FileMgr->FixupRelativePath(NewOutFile); 399 if (llvm::error_code ec = llvm::sys::fs::rename(it->TempFilename, 400 NewOutFile.str())) { 401 getDiagnostics().Report(diag::err_fe_unable_to_rename_temp) 402 << it->TempFilename << it->Filename << ec.message(); 403 404 bool existed; 405 llvm::sys::fs::remove(it->TempFilename, existed); 406 } 407 } 408 } else if (!it->Filename.empty() && EraseFiles) 409 llvm::sys::Path(it->Filename).eraseFromDisk(); 410 411 } 412 OutputFiles.clear(); 413 } 414 415 llvm::raw_fd_ostream * 416 CompilerInstance::createDefaultOutputFile(bool Binary, 417 StringRef InFile, 418 StringRef Extension) { 419 return createOutputFile(getFrontendOpts().OutputFile, Binary, 420 /*RemoveFileOnSignal=*/true, InFile, Extension); 421 } 422 423 llvm::raw_fd_ostream * 424 CompilerInstance::createOutputFile(StringRef OutputPath, 425 bool Binary, bool RemoveFileOnSignal, 426 StringRef InFile, 427 StringRef Extension, 428 bool UseTemporary) { 429 std::string Error, OutputPathName, TempPathName; 430 llvm::raw_fd_ostream *OS = createOutputFile(OutputPath, Error, Binary, 431 RemoveFileOnSignal, 432 InFile, Extension, 433 UseTemporary, 434 &OutputPathName, 435 &TempPathName); 436 if (!OS) { 437 getDiagnostics().Report(diag::err_fe_unable_to_open_output) 438 << OutputPath << Error; 439 return 0; 440 } 441 442 // Add the output file -- but don't try to remove "-", since this means we are 443 // using stdin. 444 addOutputFile(OutputFile((OutputPathName != "-") ? OutputPathName : "", 445 TempPathName, OS)); 446 447 return OS; 448 } 449 450 llvm::raw_fd_ostream * 451 CompilerInstance::createOutputFile(StringRef OutputPath, 452 std::string &Error, 453 bool Binary, 454 bool RemoveFileOnSignal, 455 StringRef InFile, 456 StringRef Extension, 457 bool UseTemporary, 458 std::string *ResultPathName, 459 std::string *TempPathName) { 460 std::string OutFile, TempFile; 461 if (!OutputPath.empty()) { 462 OutFile = OutputPath; 463 } else if (InFile == "-") { 464 OutFile = "-"; 465 } else if (!Extension.empty()) { 466 llvm::sys::Path Path(InFile); 467 Path.eraseSuffix(); 468 Path.appendSuffix(Extension); 469 OutFile = Path.str(); 470 } else { 471 OutFile = "-"; 472 } 473 474 llvm::OwningPtr<llvm::raw_fd_ostream> OS; 475 std::string OSFile; 476 477 if (UseTemporary && OutFile != "-") { 478 llvm::sys::Path OutPath(OutFile); 479 // Only create the temporary if we can actually write to OutPath, otherwise 480 // we want to fail early. 481 bool Exists; 482 if ((llvm::sys::fs::exists(OutPath.str(), Exists) || !Exists) || 483 (OutPath.isRegularFile() && OutPath.canWrite())) { 484 // Create a temporary file. 485 llvm::SmallString<128> TempPath; 486 TempPath = OutFile; 487 TempPath += "-%%%%%%%%"; 488 int fd; 489 if (llvm::sys::fs::unique_file(TempPath.str(), fd, TempPath, 490 /*makeAbsolute=*/false) == llvm::errc::success) { 491 OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true)); 492 OSFile = TempFile = TempPath.str(); 493 } 494 } 495 } 496 497 if (!OS) { 498 OSFile = OutFile; 499 OS.reset( 500 new llvm::raw_fd_ostream(OSFile.c_str(), Error, 501 (Binary ? llvm::raw_fd_ostream::F_Binary : 0))); 502 if (!Error.empty()) 503 return 0; 504 } 505 506 // Make sure the out stream file gets removed if we crash. 507 if (RemoveFileOnSignal) 508 llvm::sys::RemoveFileOnSignal(llvm::sys::Path(OSFile)); 509 510 if (ResultPathName) 511 *ResultPathName = OutFile; 512 if (TempPathName) 513 *TempPathName = TempFile; 514 515 return OS.take(); 516 } 517 518 // Initialization Utilities 519 520 bool CompilerInstance::InitializeSourceManager(StringRef InputFile) { 521 return InitializeSourceManager(InputFile, getDiagnostics(), getFileManager(), 522 getSourceManager(), getFrontendOpts()); 523 } 524 525 bool CompilerInstance::InitializeSourceManager(StringRef InputFile, 526 Diagnostic &Diags, 527 FileManager &FileMgr, 528 SourceManager &SourceMgr, 529 const FrontendOptions &Opts) { 530 // Figure out where to get and map in the main file, unless it's already 531 // been created (e.g., by a precompiled preamble). 532 if (!SourceMgr.getMainFileID().isInvalid()) { 533 // Do nothing: the main file has already been set. 534 } else if (InputFile != "-") { 535 const FileEntry *File = FileMgr.getFile(InputFile); 536 if (!File) { 537 Diags.Report(diag::err_fe_error_reading) << InputFile; 538 return false; 539 } 540 SourceMgr.createMainFileID(File); 541 } else { 542 llvm::OwningPtr<llvm::MemoryBuffer> SB; 543 if (llvm::MemoryBuffer::getSTDIN(SB)) { 544 // FIXME: Give ec.message() in this diag. 545 Diags.Report(diag::err_fe_error_reading_stdin); 546 return false; 547 } 548 const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(), 549 SB->getBufferSize(), 0); 550 SourceMgr.createMainFileID(File); 551 SourceMgr.overrideFileContents(File, SB.take()); 552 } 553 554 assert(!SourceMgr.getMainFileID().isInvalid() && 555 "Couldn't establish MainFileID!"); 556 return true; 557 } 558 559 // High-Level Operations 560 561 bool CompilerInstance::ExecuteAction(FrontendAction &Act) { 562 assert(hasDiagnostics() && "Diagnostics engine is not initialized!"); 563 assert(!getFrontendOpts().ShowHelp && "Client must handle '-help'!"); 564 assert(!getFrontendOpts().ShowVersion && "Client must handle '-version'!"); 565 566 // FIXME: Take this as an argument, once all the APIs we used have moved to 567 // taking it as an input instead of hard-coding llvm::errs. 568 raw_ostream &OS = llvm::errs(); 569 570 // Create the target instance. 571 setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), getTargetOpts())); 572 if (!hasTarget()) 573 return false; 574 575 // Inform the target of the language options. 576 // 577 // FIXME: We shouldn't need to do this, the target should be immutable once 578 // created. This complexity should be lifted elsewhere. 579 getTarget().setForcedLangOptions(getLangOpts()); 580 581 // Validate/process some options. 582 if (getHeaderSearchOpts().Verbose) 583 OS << "clang -cc1 version " CLANG_VERSION_STRING 584 << " based upon " << PACKAGE_STRING 585 << " hosted on " << llvm::sys::getHostTriple() << "\n"; 586 587 if (getFrontendOpts().ShowTimers) 588 createFrontendTimer(); 589 590 if (getFrontendOpts().ShowStats) 591 llvm::EnableStatistics(); 592 593 for (unsigned i = 0, e = getFrontendOpts().Inputs.size(); i != e; ++i) { 594 const std::string &InFile = getFrontendOpts().Inputs[i].second; 595 596 // Reset the ID tables if we are reusing the SourceManager. 597 if (hasSourceManager()) 598 getSourceManager().clearIDTables(); 599 600 if (Act.BeginSourceFile(*this, InFile, getFrontendOpts().Inputs[i].first)) { 601 Act.Execute(); 602 Act.EndSourceFile(); 603 } 604 } 605 606 if (getDiagnosticOpts().ShowCarets) { 607 // We can have multiple diagnostics sharing one diagnostic client. 608 // Get the total number of warnings/errors from the client. 609 unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings(); 610 unsigned NumErrors = getDiagnostics().getClient()->getNumErrors(); 611 612 if (NumWarnings) 613 OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s"); 614 if (NumWarnings && NumErrors) 615 OS << " and "; 616 if (NumErrors) 617 OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s"); 618 if (NumWarnings || NumErrors) 619 OS << " generated.\n"; 620 } 621 622 if (getFrontendOpts().ShowStats && hasFileManager()) { 623 getFileManager().PrintStats(); 624 OS << "\n"; 625 } 626 627 return !getDiagnostics().getClient()->getNumErrors(); 628 } 629 630 /// \brief Determine the appropriate source input kind based on language 631 /// options. 632 static InputKind getSourceInputKindFromOptions(const LangOptions &LangOpts) { 633 if (LangOpts.OpenCL) 634 return IK_OpenCL; 635 if (LangOpts.CUDA) 636 return IK_CUDA; 637 if (LangOpts.ObjC1) 638 return LangOpts.CPlusPlus? IK_ObjCXX : IK_ObjC; 639 return LangOpts.CPlusPlus? IK_CXX : IK_C; 640 } 641 642 /// \brief Compile a module file for the given module name with the given 643 /// umbrella header, using the options provided by the importing compiler 644 /// instance. 645 static void compileModule(CompilerInstance &ImportingInstance, 646 StringRef ModuleName, 647 StringRef UmbrellaHeader) { 648 // Determine the file that we'll be writing to. 649 llvm::SmallString<128> ModuleFile; 650 ModuleFile += 651 ImportingInstance.getInvocation().getHeaderSearchOpts().ModuleCachePath; 652 llvm::sys::path::append(ModuleFile, ModuleName + ".pcm"); 653 654 // Construct a compiler invocation for creating this module. 655 llvm::IntrusiveRefCntPtr<CompilerInvocation> Invocation 656 (new CompilerInvocation(ImportingInstance.getInvocation())); 657 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts(); 658 FrontendOpts.OutputFile = ModuleFile.str(); 659 FrontendOpts.DisableFree = false; 660 FrontendOpts.Inputs.clear(); 661 FrontendOpts.Inputs.push_back( 662 std::make_pair(getSourceInputKindFromOptions(Invocation->getLangOpts()), 663 UmbrellaHeader)); 664 665 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0; 666 667 // FIXME: Strip away all of the compilation options that won't be transferred 668 // down to the module. This presumably includes -D flags, optimization 669 // settings, etc. 670 671 // Construct a compiler instance that will be used to actually create the 672 // module. 673 CompilerInstance Instance; 674 Instance.setInvocation(&*Invocation); 675 Instance.createDiagnostics(/*argc=*/0, /*argv=*/0, 676 &ImportingInstance.getDiagnosticClient(), 677 /*ShouldOwnClient=*/false); 678 679 // Construct a module-generating action. 680 GeneratePCHAction CreateModuleAction(true); 681 682 // Execute the action to actually build the module in-place. 683 // FIXME: Need to synchronize when multiple processes do this. 684 Instance.ExecuteAction(CreateModuleAction); 685 686 // Tell the importing instance's file manager to forget about the module 687 // file, since we've just created it. 688 ImportingInstance.getFileManager().forgetFile(ModuleFile); 689 690 // Tell the diagnostic client that it's (re-)starting to process a source 691 // file. 692 ImportingInstance.getDiagnosticClient() 693 .BeginSourceFile(ImportingInstance.getLangOpts(), 694 &ImportingInstance.getPreprocessor()); 695 } 696 697 ModuleKey CompilerInstance::loadModule(SourceLocation ImportLoc, 698 IdentifierInfo &ModuleName, 699 SourceLocation ModuleNameLoc) { 700 // Determine what file we're searching from. 701 SourceManager &SourceMgr = getSourceManager(); 702 SourceLocation ExpandedImportLoc = SourceMgr.getExpansionLoc(ImportLoc); 703 const FileEntry *CurFile 704 = SourceMgr.getFileEntryForID(SourceMgr.getFileID(ExpandedImportLoc)); 705 if (!CurFile) 706 CurFile = SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()); 707 708 // Search for a module with the given name. 709 std::string UmbrellaHeader; 710 const FileEntry *ModuleFile 711 = PP->getHeaderSearchInfo().lookupModule(ModuleName.getName(), 712 &UmbrellaHeader); 713 714 bool BuildingModule = false; 715 if (!ModuleFile && !UmbrellaHeader.empty()) { 716 // We didn't find the module, but there is an umbrella header that 717 // can be used to create the module file. Create a separate compilation 718 // module to do so. 719 BuildingModule = true; 720 compileModule(*this, ModuleName.getName(), UmbrellaHeader); 721 ModuleFile = PP->getHeaderSearchInfo().lookupModule(ModuleName.getName()); 722 } 723 724 if (!ModuleFile) { 725 getDiagnostics().Report(ModuleNameLoc, 726 BuildingModule? diag::err_module_not_built 727 : diag::err_module_not_found) 728 << ModuleName.getName() 729 << SourceRange(ImportLoc, ModuleNameLoc); 730 return 0; 731 } 732 733 // If we don't already have an ASTReader, create one now. 734 if (!ModuleManager) { 735 std::string Sysroot = getHeaderSearchOpts().Sysroot; 736 const PreprocessorOptions &PPOpts = getPreprocessorOpts(); 737 ModuleManager = new ASTReader(getPreprocessor(), *Context, 738 Sysroot.empty() ? "" : Sysroot.c_str(), 739 PPOpts.DisablePCHValidation, 740 PPOpts.DisableStatCache); 741 ModuleManager->setDeserializationListener( 742 getASTConsumer().GetASTDeserializationListener()); 743 getASTContext().setASTMutationListener( 744 getASTConsumer().GetASTMutationListener()); 745 llvm::OwningPtr<ExternalASTSource> Source; 746 Source.reset(ModuleManager); 747 getASTContext().setExternalSource(Source); 748 ModuleManager->InitializeSema(getSema()); 749 } 750 751 // Try to load the module we found. 752 switch (ModuleManager->ReadAST(ModuleFile->getName(), 753 serialization::MK_Module)) { 754 case ASTReader::Success: 755 break; 756 757 case ASTReader::IgnorePCH: 758 // FIXME: The ASTReader will already have complained, but can we showhorn 759 // that diagnostic information into a more useful form? 760 return 0; 761 762 case ASTReader::Failure: 763 // Already complained. 764 return 0; 765 } 766 767 // FIXME: The module file's FileEntry makes a poor key indeed! 768 return (ModuleKey)ModuleFile; 769 } 770 771