C++ IntrusiveRefCntPtr::getModuleHash方法代码示例

/// \brief Compile a module file for the given module, using the options 
/// provided by the importing compiler instance.
static void compileModule(CompilerInstance &ImportingInstance,
                          SourceLocation ImportLoc,
                          Module *Module,
                          StringRef ModuleFileName) {
  llvm::LockFileManager Locked(ModuleFileName);
  switch (Locked) {
  case llvm::LockFileManager::LFS_Error:
    return;

  case llvm::LockFileManager::LFS_Owned:
    // We're responsible for building the module ourselves. Do so below.
    break;

  case llvm::LockFileManager::LFS_Shared:
    // Someone else is responsible for building the module. Wait for them to
    // finish.
    Locked.waitForUnlock();
    return;
  }

  ModuleMap &ModMap 
    = ImportingInstance.getPreprocessor().getHeaderSearchInfo().getModuleMap();
    
  // Construct a compiler invocation for creating this module.
  IntrusiveRefCntPtr<CompilerInvocation> Invocation
    (new CompilerInvocation(ImportingInstance.getInvocation()));

  PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
  
  // For any options that aren't intended to affect how a module is built,
  // reset them to their default values.
  Invocation->getLangOpts()->resetNonModularOptions();
  PPOpts.resetNonModularOptions();

  // Note the name of the module we're building.
  Invocation->getLangOpts()->CurrentModule = Module->getTopLevelModuleName();

  // Make sure that the failed-module structure has been allocated in
  // the importing instance, and propagate the pointer to the newly-created
  // instance.
  PreprocessorOptions &ImportingPPOpts
    = ImportingInstance.getInvocation().getPreprocessorOpts();
  if (!ImportingPPOpts.FailedModules)
    ImportingPPOpts.FailedModules = new PreprocessorOptions::FailedModulesSet;
  PPOpts.FailedModules = ImportingPPOpts.FailedModules;

  // If there is a module map file, build the module using the module map.
  // Set up the inputs/outputs so that we build the module from its umbrella
  // header.
  FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
  FrontendOpts.OutputFile = ModuleFileName.str();
  FrontendOpts.DisableFree = false;
  FrontendOpts.Inputs.clear();
  InputKind IK = getSourceInputKindFromOptions(*Invocation->getLangOpts());

  // Get or create the module map that we'll use to build this module.
  SmallString<128> TempModuleMapFileName;
  if (const FileEntry *ModuleMapFile
                                  = ModMap.getContainingModuleMapFile(Module)) {
    // Use the module map where this module resides.
    FrontendOpts.Inputs.push_back(FrontendInputFile(ModuleMapFile->getName(), 
                                                    IK));
  } else {
    // Create a temporary module map file.
    TempModuleMapFileName = Module->Name;
    TempModuleMapFileName += "-%%%%%%%%.map";
    int FD;
    if (llvm::sys::fs::unique_file(TempModuleMapFileName.str(), FD, 
                                   TempModuleMapFileName,
                                   /*makeAbsolute=*/true)
          != llvm::errc::success) {
      ImportingInstance.getDiagnostics().Report(diag::err_module_map_temp_file)
        << TempModuleMapFileName;
      return;
    }
    // Print the module map to this file.
    llvm::raw_fd_ostream OS(FD, /*shouldClose=*/true);
    Module->print(OS);
    FrontendOpts.Inputs.push_back(
      FrontendInputFile(TempModuleMapFileName.str().str(), IK));
  }

  // Don't free the remapped file buffers; they are owned by our caller.
  PPOpts.RetainRemappedFileBuffers = true;
    
  Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
  assert(ImportingInstance.getInvocation().getModuleHash() ==
         Invocation->getModuleHash() && "Module hash mismatch!");
  
  // Construct a compiler instance that will be used to actually create the
  // module.
  CompilerInstance Instance;
  Instance.setInvocation(&*Invocation);
  Instance.createDiagnostics(/*argc=*/0, /*argv=*/0,
                             &ImportingInstance.getDiagnosticClient(),
                             /*ShouldOwnClient=*/true,
                             /*ShouldCloneClient=*/true);

//.........这里部分代码省略.........