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 // Set up the module path, including the hash for the 225 // module-creation options. 226 llvm::SmallString<256> SpecificModuleCache( 227 getHeaderSearchOpts().ModuleCachePath); 228 if (!getHeaderSearchOpts().DisableModuleHash) 229 llvm::sys::path::append(SpecificModuleCache, 230 getInvocation().getModuleHash()); 231 PP->getHeaderSearchInfo().setModuleCachePath(SpecificModuleCache); 232 233 // Handle generating dependencies, if requested. 234 const DependencyOutputOptions &DepOpts = getDependencyOutputOpts(); 235 if (!DepOpts.OutputFile.empty()) 236 AttachDependencyFileGen(*PP, DepOpts); 237 238 // Handle generating header include information, if requested. 239 if (DepOpts.ShowHeaderIncludes) 240 AttachHeaderIncludeGen(*PP); 241 if (!DepOpts.HeaderIncludeOutputFile.empty()) { 242 StringRef OutputPath = DepOpts.HeaderIncludeOutputFile; 243 if (OutputPath == "-") 244 OutputPath = ""; 245 AttachHeaderIncludeGen(*PP, /*ShowAllHeaders=*/true, OutputPath, 246 /*ShowDepth=*/false); 247 } 248 } 249 250 // ASTContext 251 252 void CompilerInstance::createASTContext() { 253 Preprocessor &PP = getPreprocessor(); 254 Context = new ASTContext(getLangOpts(), PP.getSourceManager(), 255 &getTarget(), PP.getIdentifierTable(), 256 PP.getSelectorTable(), PP.getBuiltinInfo(), 257 /*size_reserve=*/ 0); 258 } 259 260 // ExternalASTSource 261 262 void CompilerInstance::createPCHExternalASTSource(StringRef Path, 263 bool DisablePCHValidation, 264 bool DisableStatCache, 265 void *DeserializationListener){ 266 llvm::OwningPtr<ExternalASTSource> Source; 267 bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0; 268 Source.reset(createPCHExternalASTSource(Path, getHeaderSearchOpts().Sysroot, 269 DisablePCHValidation, 270 DisableStatCache, 271 getPreprocessor(), getASTContext(), 272 DeserializationListener, 273 Preamble)); 274 ModuleManager = static_cast<ASTReader*>(Source.get()); 275 getASTContext().setExternalSource(Source); 276 } 277 278 ExternalASTSource * 279 CompilerInstance::createPCHExternalASTSource(StringRef Path, 280 const std::string &Sysroot, 281 bool DisablePCHValidation, 282 bool DisableStatCache, 283 Preprocessor &PP, 284 ASTContext &Context, 285 void *DeserializationListener, 286 bool Preamble) { 287 llvm::OwningPtr<ASTReader> Reader; 288 Reader.reset(new ASTReader(PP, Context, 289 Sysroot.empty() ? "" : Sysroot.c_str(), 290 DisablePCHValidation, DisableStatCache)); 291 292 Reader->setDeserializationListener( 293 static_cast<ASTDeserializationListener *>(DeserializationListener)); 294 switch (Reader->ReadAST(Path, 295 Preamble ? serialization::MK_Preamble 296 : serialization::MK_PCH)) { 297 case ASTReader::Success: 298 // Set the predefines buffer as suggested by the PCH reader. Typically, the 299 // predefines buffer will be empty. 300 PP.setPredefines(Reader->getSuggestedPredefines()); 301 return Reader.take(); 302 303 case ASTReader::Failure: 304 // Unrecoverable failure: don't even try to process the input file. 305 break; 306 307 case ASTReader::IgnorePCH: 308 // No suitable PCH file could be found. Return an error. 309 break; 310 } 311 312 return 0; 313 } 314 315 // Code Completion 316 317 static bool EnableCodeCompletion(Preprocessor &PP, 318 const std::string &Filename, 319 unsigned Line, 320 unsigned Column) { 321 // Tell the source manager to chop off the given file at a specific 322 // line and column. 323 const FileEntry *Entry = PP.getFileManager().getFile(Filename); 324 if (!Entry) { 325 PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file) 326 << Filename; 327 return true; 328 } 329 330 // Truncate the named file at the given line/column. 331 PP.SetCodeCompletionPoint(Entry, Line, Column); 332 return false; 333 } 334 335 void CompilerInstance::createCodeCompletionConsumer() { 336 const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt; 337 if (!CompletionConsumer) { 338 CompletionConsumer.reset( 339 createCodeCompletionConsumer(getPreprocessor(), 340 Loc.FileName, Loc.Line, Loc.Column, 341 getFrontendOpts().ShowMacrosInCodeCompletion, 342 getFrontendOpts().ShowCodePatternsInCodeCompletion, 343 getFrontendOpts().ShowGlobalSymbolsInCodeCompletion, 344 llvm::outs())); 345 if (!CompletionConsumer) 346 return; 347 } else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName, 348 Loc.Line, Loc.Column)) { 349 CompletionConsumer.reset(); 350 return; 351 } 352 353 if (CompletionConsumer->isOutputBinary() && 354 llvm::sys::Program::ChangeStdoutToBinary()) { 355 getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary); 356 CompletionConsumer.reset(); 357 } 358 } 359 360 void CompilerInstance::createFrontendTimer() { 361 FrontendTimer.reset(new llvm::Timer("Clang front-end timer")); 362 } 363 364 CodeCompleteConsumer * 365 CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP, 366 const std::string &Filename, 367 unsigned Line, 368 unsigned Column, 369 bool ShowMacros, 370 bool ShowCodePatterns, 371 bool ShowGlobals, 372 raw_ostream &OS) { 373 if (EnableCodeCompletion(PP, Filename, Line, Column)) 374 return 0; 375 376 // Set up the creation routine for code-completion. 377 return new PrintingCodeCompleteConsumer(ShowMacros, ShowCodePatterns, 378 ShowGlobals, OS); 379 } 380 381 void CompilerInstance::createSema(TranslationUnitKind TUKind, 382 CodeCompleteConsumer *CompletionConsumer) { 383 TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(), 384 TUKind, CompletionConsumer)); 385 } 386 387 // Output Files 388 389 void CompilerInstance::addOutputFile(const OutputFile &OutFile) { 390 assert(OutFile.OS && "Attempt to add empty stream to output list!"); 391 OutputFiles.push_back(OutFile); 392 } 393 394 void CompilerInstance::clearOutputFiles(bool EraseFiles) { 395 for (std::list<OutputFile>::iterator 396 it = OutputFiles.begin(), ie = OutputFiles.end(); it != ie; ++it) { 397 delete it->OS; 398 if (!it->TempFilename.empty()) { 399 if (EraseFiles) { 400 bool existed; 401 llvm::sys::fs::remove(it->TempFilename, existed); 402 } else { 403 llvm::SmallString<128> NewOutFile(it->Filename); 404 405 // If '-working-directory' was passed, the output filename should be 406 // relative to that. 407 FileMgr->FixupRelativePath(NewOutFile); 408 if (llvm::error_code ec = llvm::sys::fs::rename(it->TempFilename, 409 NewOutFile.str())) { 410 getDiagnostics().Report(diag::err_fe_unable_to_rename_temp) 411 << it->TempFilename << it->Filename << ec.message(); 412 413 bool existed; 414 llvm::sys::fs::remove(it->TempFilename, existed); 415 } 416 } 417 } else if (!it->Filename.empty() && EraseFiles) 418 llvm::sys::Path(it->Filename).eraseFromDisk(); 419 420 } 421 OutputFiles.clear(); 422 } 423 424 llvm::raw_fd_ostream * 425 CompilerInstance::createDefaultOutputFile(bool Binary, 426 StringRef InFile, 427 StringRef Extension) { 428 return createOutputFile(getFrontendOpts().OutputFile, Binary, 429 /*RemoveFileOnSignal=*/true, InFile, Extension); 430 } 431 432 llvm::raw_fd_ostream * 433 CompilerInstance::createOutputFile(StringRef OutputPath, 434 bool Binary, bool RemoveFileOnSignal, 435 StringRef InFile, 436 StringRef Extension, 437 bool UseTemporary) { 438 std::string Error, OutputPathName, TempPathName; 439 llvm::raw_fd_ostream *OS = createOutputFile(OutputPath, Error, Binary, 440 RemoveFileOnSignal, 441 InFile, Extension, 442 UseTemporary, 443 &OutputPathName, 444 &TempPathName); 445 if (!OS) { 446 getDiagnostics().Report(diag::err_fe_unable_to_open_output) 447 << OutputPath << Error; 448 return 0; 449 } 450 451 // Add the output file -- but don't try to remove "-", since this means we are 452 // using stdin. 453 addOutputFile(OutputFile((OutputPathName != "-") ? OutputPathName : "", 454 TempPathName, OS)); 455 456 return OS; 457 } 458 459 llvm::raw_fd_ostream * 460 CompilerInstance::createOutputFile(StringRef OutputPath, 461 std::string &Error, 462 bool Binary, 463 bool RemoveFileOnSignal, 464 StringRef InFile, 465 StringRef Extension, 466 bool UseTemporary, 467 std::string *ResultPathName, 468 std::string *TempPathName) { 469 std::string OutFile, TempFile; 470 if (!OutputPath.empty()) { 471 OutFile = OutputPath; 472 } else if (InFile == "-") { 473 OutFile = "-"; 474 } else if (!Extension.empty()) { 475 llvm::sys::Path Path(InFile); 476 Path.eraseSuffix(); 477 Path.appendSuffix(Extension); 478 OutFile = Path.str(); 479 } else { 480 OutFile = "-"; 481 } 482 483 llvm::OwningPtr<llvm::raw_fd_ostream> OS; 484 std::string OSFile; 485 486 if (UseTemporary && OutFile != "-") { 487 llvm::sys::Path OutPath(OutFile); 488 // Only create the temporary if we can actually write to OutPath, otherwise 489 // we want to fail early. 490 bool Exists; 491 if ((llvm::sys::fs::exists(OutPath.str(), Exists) || !Exists) || 492 (OutPath.isRegularFile() && OutPath.canWrite())) { 493 // Create a temporary file. 494 llvm::SmallString<128> TempPath; 495 TempPath = OutFile; 496 TempPath += "-%%%%%%%%"; 497 int fd; 498 if (llvm::sys::fs::unique_file(TempPath.str(), fd, TempPath, 499 /*makeAbsolute=*/false) == llvm::errc::success) { 500 OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true)); 501 OSFile = TempFile = TempPath.str(); 502 } 503 } 504 } 505 506 if (!OS) { 507 OSFile = OutFile; 508 OS.reset( 509 new llvm::raw_fd_ostream(OSFile.c_str(), Error, 510 (Binary ? llvm::raw_fd_ostream::F_Binary : 0))); 511 if (!Error.empty()) 512 return 0; 513 } 514 515 // Make sure the out stream file gets removed if we crash. 516 if (RemoveFileOnSignal) 517 llvm::sys::RemoveFileOnSignal(llvm::sys::Path(OSFile)); 518 519 if (ResultPathName) 520 *ResultPathName = OutFile; 521 if (TempPathName) 522 *TempPathName = TempFile; 523 524 return OS.take(); 525 } 526 527 // Initialization Utilities 528 529 bool CompilerInstance::InitializeSourceManager(StringRef InputFile) { 530 return InitializeSourceManager(InputFile, getDiagnostics(), getFileManager(), 531 getSourceManager(), getFrontendOpts()); 532 } 533 534 bool CompilerInstance::InitializeSourceManager(StringRef InputFile, 535 Diagnostic &Diags, 536 FileManager &FileMgr, 537 SourceManager &SourceMgr, 538 const FrontendOptions &Opts) { 539 // Figure out where to get and map in the main file, unless it's already 540 // been created (e.g., by a precompiled preamble). 541 if (!SourceMgr.getMainFileID().isInvalid()) { 542 // Do nothing: the main file has already been set. 543 } else if (InputFile != "-") { 544 const FileEntry *File = FileMgr.getFile(InputFile); 545 if (!File) { 546 Diags.Report(diag::err_fe_error_reading) << InputFile; 547 return false; 548 } 549 SourceMgr.createMainFileID(File); 550 } else { 551 llvm::OwningPtr<llvm::MemoryBuffer> SB; 552 if (llvm::MemoryBuffer::getSTDIN(SB)) { 553 // FIXME: Give ec.message() in this diag. 554 Diags.Report(diag::err_fe_error_reading_stdin); 555 return false; 556 } 557 const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(), 558 SB->getBufferSize(), 0); 559 SourceMgr.createMainFileID(File); 560 SourceMgr.overrideFileContents(File, SB.take()); 561 } 562 563 assert(!SourceMgr.getMainFileID().isInvalid() && 564 "Couldn't establish MainFileID!"); 565 return true; 566 } 567 568 // High-Level Operations 569 570 bool CompilerInstance::ExecuteAction(FrontendAction &Act) { 571 assert(hasDiagnostics() && "Diagnostics engine is not initialized!"); 572 assert(!getFrontendOpts().ShowHelp && "Client must handle '-help'!"); 573 assert(!getFrontendOpts().ShowVersion && "Client must handle '-version'!"); 574 575 // FIXME: Take this as an argument, once all the APIs we used have moved to 576 // taking it as an input instead of hard-coding llvm::errs. 577 raw_ostream &OS = llvm::errs(); 578 579 // Create the target instance. 580 setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), getTargetOpts())); 581 if (!hasTarget()) 582 return false; 583 584 // Inform the target of the language options. 585 // 586 // FIXME: We shouldn't need to do this, the target should be immutable once 587 // created. This complexity should be lifted elsewhere. 588 getTarget().setForcedLangOptions(getLangOpts()); 589 590 // Validate/process some options. 591 if (getHeaderSearchOpts().Verbose) 592 OS << "clang -cc1 version " CLANG_VERSION_STRING 593 << " based upon " << PACKAGE_STRING 594 << " hosted on " << llvm::sys::getHostTriple() << "\n"; 595 596 if (getFrontendOpts().ShowTimers) 597 createFrontendTimer(); 598 599 if (getFrontendOpts().ShowStats) 600 llvm::EnableStatistics(); 601 602 for (unsigned i = 0, e = getFrontendOpts().Inputs.size(); i != e; ++i) { 603 const std::string &InFile = getFrontendOpts().Inputs[i].second; 604 605 // Reset the ID tables if we are reusing the SourceManager. 606 if (hasSourceManager()) 607 getSourceManager().clearIDTables(); 608 609 if (Act.BeginSourceFile(*this, InFile, getFrontendOpts().Inputs[i].first)) { 610 Act.Execute(); 611 Act.EndSourceFile(); 612 } 613 } 614 615 if (getDiagnosticOpts().ShowCarets) { 616 // We can have multiple diagnostics sharing one diagnostic client. 617 // Get the total number of warnings/errors from the client. 618 unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings(); 619 unsigned NumErrors = getDiagnostics().getClient()->getNumErrors(); 620 621 if (NumWarnings) 622 OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s"); 623 if (NumWarnings && NumErrors) 624 OS << " and "; 625 if (NumErrors) 626 OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s"); 627 if (NumWarnings || NumErrors) 628 OS << " generated.\n"; 629 } 630 631 if (getFrontendOpts().ShowStats && hasFileManager()) { 632 getFileManager().PrintStats(); 633 OS << "\n"; 634 } 635 636 return !getDiagnostics().getClient()->getNumErrors(); 637 } 638 639 /// \brief Determine the appropriate source input kind based on language 640 /// options. 641 static InputKind getSourceInputKindFromOptions(const LangOptions &LangOpts) { 642 if (LangOpts.OpenCL) 643 return IK_OpenCL; 644 if (LangOpts.CUDA) 645 return IK_CUDA; 646 if (LangOpts.ObjC1) 647 return LangOpts.CPlusPlus? IK_ObjCXX : IK_ObjC; 648 return LangOpts.CPlusPlus? IK_CXX : IK_C; 649 } 650 651 /// \brief Compile a module file for the given module name with the given 652 /// umbrella header, using the options provided by the importing compiler 653 /// instance. 654 static void compileModule(CompilerInstance &ImportingInstance, 655 StringRef ModuleName, 656 StringRef ModuleFileName, 657 StringRef UmbrellaHeader) { 658 // Construct a compiler invocation for creating this module. 659 llvm::IntrusiveRefCntPtr<CompilerInvocation> Invocation 660 (new CompilerInvocation(ImportingInstance.getInvocation())); 661 Invocation->getLangOpts().resetNonModularOptions(); 662 Invocation->getPreprocessorOpts().resetNonModularOptions(); 663 664 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts(); 665 FrontendOpts.OutputFile = ModuleFileName.str(); 666 FrontendOpts.DisableFree = false; 667 FrontendOpts.Inputs.clear(); 668 FrontendOpts.Inputs.push_back( 669 std::make_pair(getSourceInputKindFromOptions(Invocation->getLangOpts()), 670 UmbrellaHeader)); 671 672 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0; 673 674 assert(ImportingInstance.getInvocation().getModuleHash() == 675 Invocation->getModuleHash() && "Module hash mismatch!"); 676 677 // Construct a compiler instance that will be used to actually create the 678 // module. 679 CompilerInstance Instance; 680 Instance.setInvocation(&*Invocation); 681 Instance.createDiagnostics(/*argc=*/0, /*argv=*/0, 682 &ImportingInstance.getDiagnosticClient(), 683 /*ShouldOwnClient=*/false); 684 685 // Construct a module-generating action. 686 GeneratePCHAction CreateModuleAction(true); 687 688 // Execute the action to actually build the module in-place. 689 // FIXME: Need to synchronize when multiple processes do this. 690 Instance.ExecuteAction(CreateModuleAction); 691 692 // Tell the diagnostic client that it's (re-)starting to process a source 693 // file. 694 ImportingInstance.getDiagnosticClient() 695 .BeginSourceFile(ImportingInstance.getLangOpts(), 696 &ImportingInstance.getPreprocessor()); 697 } 698 699 ModuleKey CompilerInstance::loadModule(SourceLocation ImportLoc, 700 IdentifierInfo &ModuleName, 701 SourceLocation ModuleNameLoc) { 702 // Determine what file we're searching from. 703 SourceManager &SourceMgr = getSourceManager(); 704 SourceLocation ExpandedImportLoc = SourceMgr.getExpansionLoc(ImportLoc); 705 const FileEntry *CurFile 706 = SourceMgr.getFileEntryForID(SourceMgr.getFileID(ExpandedImportLoc)); 707 if (!CurFile) 708 CurFile = SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()); 709 710 // Search for a module with the given name. 711 std::string UmbrellaHeader; 712 std::string ModuleFileName; 713 const FileEntry *ModuleFile 714 = PP->getHeaderSearchInfo().lookupModule(ModuleName.getName(), 715 &ModuleFileName, 716 &UmbrellaHeader); 717 718 bool BuildingModule = false; 719 if (!ModuleFile && !UmbrellaHeader.empty()) { 720 // We didn't find the module, but there is an umbrella header that 721 // can be used to create the module file. Create a separate compilation 722 // module to do so. 723 BuildingModule = true; 724 compileModule(*this, ModuleName.getName(), ModuleFileName, UmbrellaHeader); 725 ModuleFile = PP->getHeaderSearchInfo().lookupModule(ModuleName.getName()); 726 } 727 728 if (!ModuleFile) { 729 getDiagnostics().Report(ModuleNameLoc, 730 BuildingModule? diag::err_module_not_built 731 : diag::err_module_not_found) 732 << ModuleName.getName() 733 << SourceRange(ImportLoc, ModuleNameLoc); 734 return 0; 735 } 736 737 // If we don't already have an ASTReader, create one now. 738 if (!ModuleManager) { 739 std::string Sysroot = getHeaderSearchOpts().Sysroot; 740 const PreprocessorOptions &PPOpts = getPreprocessorOpts(); 741 ModuleManager = new ASTReader(getPreprocessor(), *Context, 742 Sysroot.empty() ? "" : Sysroot.c_str(), 743 PPOpts.DisablePCHValidation, 744 PPOpts.DisableStatCache); 745 ModuleManager->setDeserializationListener( 746 getASTConsumer().GetASTDeserializationListener()); 747 getASTContext().setASTMutationListener( 748 getASTConsumer().GetASTMutationListener()); 749 llvm::OwningPtr<ExternalASTSource> Source; 750 Source.reset(ModuleManager); 751 getASTContext().setExternalSource(Source); 752 ModuleManager->InitializeSema(getSema()); 753 } 754 755 // Try to load the module we found. 756 switch (ModuleManager->ReadAST(ModuleFile->getName(), 757 serialization::MK_Module)) { 758 case ASTReader::Success: 759 break; 760 761 case ASTReader::IgnorePCH: 762 // FIXME: The ASTReader will already have complained, but can we showhorn 763 // that diagnostic information into a more useful form? 764 return 0; 765 766 case ASTReader::Failure: 767 // Already complained. 768 return 0; 769 } 770 771 // FIXME: The module file's FileEntry makes a poor key indeed! 772 return (ModuleKey)ModuleFile; 773 } 774 775