C++ CIndexer::getClangResourcesPath方法代码示例

//.........这里部分代码省略.........

  if (!CInvok)
    return;

  // Recover resources if we crash before exiting this function.
  llvm::CrashRecoveryContextCleanupRegistrar<CompilerInvocation,
    llvm::CrashRecoveryContextReleaseRefCleanup<CompilerInvocation> >
    CInvokCleanup(CInvok.getPtr());

  if (CInvok->getFrontendOpts().Inputs.empty())
    return;

  OwningPtr<MemBufferOwner> BufOwner(new MemBufferOwner());

  // Recover resources if we crash before exiting this method.
  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner>
    BufOwnerCleanup(BufOwner.get());

  for (unsigned I = 0; I != num_unsaved_files; ++I) {
    StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
    const llvm::MemoryBuffer *Buffer
      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
    CInvok->getPreprocessorOpts().addRemappedFile(unsaved_files[I].Filename, Buffer);
    BufOwner->Buffers.push_back(Buffer);
  }

  // Since libclang is primarily used by batch tools dealing with
  // (often very broken) source code, where spell-checking can have a
  // significant negative impact on performance (particularly when 
  // precompiled headers are involved), we disable it.
  CInvok->getLangOpts()->SpellChecking = false;

  if (index_options & CXIndexOpt_SuppressWarnings)
    CInvok->getDiagnosticOpts().IgnoreWarnings = true;

  ASTUnit *Unit = ASTUnit::create(CInvok.getPtr(), Diags,
                                  /*CaptureDiagnostics=*/true,
                                  /*UserFilesAreVolatile=*/true);
  OwningPtr<CXTUOwner> CXTU(new CXTUOwner(MakeCXTranslationUnit(CXXIdx, Unit)));

  // Recover resources if we crash before exiting this method.
  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
    CXTUCleanup(CXTU.get());

  OwningPtr<IndexingFrontendAction> IndexAction;
  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
                                               index_options, CXTU->getTU()));

  // Recover resources if we crash before exiting this method.
  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
    IndexActionCleanup(IndexAction.get());

  bool Persistent = requestedToGetTU;
  bool OnlyLocalDecls = false;
  bool PrecompilePreamble = false;
  bool CacheCodeCompletionResults = false;
  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts(); 
  PPOpts.AllowPCHWithCompilerErrors = true;

  if (requestedToGetTU) {
    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
    // FIXME: Add a flag for modules.
    CacheCodeCompletionResults
      = TU_options & CXTranslationUnit_CacheCompletionResults;
    if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
      PPOpts.DetailedRecord = true;
    }
  }

  IndexAction->EnablePPDetailedRecordForModules
    = PPOpts.DetailedRecord ||
      (TU_options & CXTranslationUnit_DetailedPreprocessingRecord);

  if (!requestedToGetTU)
    PPOpts.DetailedRecord = false;

  DiagnosticErrorTrap DiagTrap(*Diags);
  bool Success = ASTUnit::LoadFromCompilerInvocationAction(CInvok.getPtr(), Diags,
                                                       IndexAction.get(),
                                                       Unit,
                                                       Persistent,
                                                CXXIdx->getClangResourcesPath(),
                                                       OnlyLocalDecls,
                                                    /*CaptureDiagnostics=*/true,
                                                       PrecompilePreamble,
                                                    CacheCodeCompletionResults,
                                 /*IncludeBriefCommentsInCodeCompletion=*/false,
                                                 /*UserFilesAreVolatile=*/true);
  if (DiagTrap.hasErrorOccurred() && CXXIdx->getDisplayDiagnostics())
    printDiagsToStderr(Unit);

  if (!Success)
    return;

  if (out_TU)
    *out_TU = CXTU->takeTU();

  ITUI->result = 0; // success.
}

//.........这里部分代码省略.........
    CInvokCleanup(CInvok.get());

  if (CInvok->getFrontendOpts().Inputs.empty())
    return CXError_Failure;

  typedef SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 8> MemBufferOwner;
  std::unique_ptr<MemBufferOwner> BufOwner(new MemBufferOwner);

  // Recover resources if we crash before exiting this method.
  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner> BufOwnerCleanup(
      BufOwner.get());

  for (auto &UF : unsaved_files) {
    std::unique_ptr<llvm::MemoryBuffer> MB =
        llvm::MemoryBuffer::getMemBufferCopy(getContents(UF), UF.Filename);
    CInvok->getPreprocessorOpts().addRemappedFile(UF.Filename, MB.get());
    BufOwner->push_back(std::move(MB));
  }

  // Since libclang is primarily used by batch tools dealing with
  // (often very broken) source code, where spell-checking can have a
  // significant negative impact on performance (particularly when 
  // precompiled headers are involved), we disable it.
  CInvok->getLangOpts()->SpellChecking = false;

  if (index_options & CXIndexOpt_SuppressWarnings)
    CInvok->getDiagnosticOpts().IgnoreWarnings = true;

  ASTUnit *Unit = ASTUnit::create(CInvok.get(), Diags, CaptureDiagnostics,
                                  /*UserFilesAreVolatile=*/true);
  if (!Unit)
    return CXError_InvalidArguments;

  std::unique_ptr<CXTUOwner> CXTU(
      new CXTUOwner(MakeCXTranslationUnit(CXXIdx, Unit)));

  // Recover resources if we crash before exiting this method.
  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
    CXTUCleanup(CXTU.get());

  // Enable the skip-parsed-bodies optimization only for C++; this may be
  // revisited.
  bool SkipBodies = (index_options & CXIndexOpt_SkipParsedBodiesInSession) &&
      CInvok->getLangOpts()->CPlusPlus;
  if (SkipBodies)
    CInvok->getFrontendOpts().SkipFunctionBodies = true;

  std::unique_ptr<IndexingFrontendAction> IndexAction;
  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
                                               index_options, CXTU->getTU(),
                        SkipBodies ? IdxSession->SkipBodyData.get() : nullptr));

  // Recover resources if we crash before exiting this method.
  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
    IndexActionCleanup(IndexAction.get());

  bool Persistent = requestedToGetTU;
  bool OnlyLocalDecls = false;
  bool PrecompilePreamble = false;
  bool CacheCodeCompletionResults = false;
  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts(); 
  PPOpts.AllowPCHWithCompilerErrors = true;

  if (requestedToGetTU) {
    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
    // FIXME: Add a flag for modules.
    CacheCodeCompletionResults
      = TU_options & CXTranslationUnit_CacheCompletionResults;
  }

  if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
    PPOpts.DetailedRecord = true;
  }

  if (!requestedToGetTU && !CInvok->getLangOpts()->Modules)
    PPOpts.DetailedRecord = false;

  DiagnosticErrorTrap DiagTrap(*Diags);
  bool Success = ASTUnit::LoadFromCompilerInvocationAction(
      CInvok.get(), CXXIdx->getPCHContainerOperations(), Diags,
      IndexAction.get(), Unit, Persistent, CXXIdx->getClangResourcesPath(),
      OnlyLocalDecls, CaptureDiagnostics, PrecompilePreamble,
      CacheCodeCompletionResults,
      /*IncludeBriefCommentsInCodeCompletion=*/false,
      /*UserFilesAreVolatile=*/true);
  if (DiagTrap.hasErrorOccurred() && CXXIdx->getDisplayDiagnostics())
    printDiagsToStderr(Unit);

  if (isASTReadError(Unit))
    return CXError_ASTReadError;

  if (!Success)
    return CXError_Failure;

  if (out_TU)
    *out_TU = CXTU->takeTU();

  return CXError_Success;
}