bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) {

  {- -------------------------------------------
  (1) もし初期化途中の段階であれば, vm_exit_during_initialization() で終了.
      ---------------------------------------- -}

      // bootstrapping check
      if (!Universe::is_fully_initialized()) {
       vm_exit_during_initialization(h_exception);
       ShouldNotReachHere();
      }

  {- -------------------------------------------
  (1) (デバッグ用の処理) (#ifdef ASSERT 時にのみ実行)
      ---------------------------------------- -}

    #ifdef ASSERT
      // Check for trying to throw stack overflow before initialization is complete
      // to prevent infinite recursion trying to initialize stack overflow without
      // adequate stack space.
      // This can happen with stress testing a large value of StackShadowPages
      if (h_exception()->klass() == SystemDictionary::StackOverflowError_klass()) {
        instanceKlass* ik = instanceKlass::cast(h_exception->klass());
        assert(ik->is_initialized(),
               "need to increase min_stack_allowed calculation");
      }
    #endif // ASSERT

  {- -------------------------------------------
  (1) もし, 引数で指定されたスレッドが VMThread か CompilerThread であれば, 
      適当な(ダミーの)例外オブジェクトを pending_exception にセットすることにする.
      この場合, (pending_exception へのセットはここでやってしまうので) true をリターン.
      ---------------------------------------- -}

      if (thread->is_VM_thread()
          || thread->is_Compiler_thread() ) {
        // We do not care what kind of exception we get for the vm-thread or a thread which
        // is compiling.  We just install a dummy exception object
        thread->set_pending_exception(Universe::vm_exception(), file, line);
        return true;
      }

  {- -------------------------------------------
  (1) 以上のどれでもなければ, false をリターン.
      ---------------------------------------- -}

      return false;
    }