// Last thread running calls java.lang.Shutdown.shutdown()

void JavaThread::invoke_shutdown_hooks() {

  {- -------------------------------------------
  (1) (変数宣言など)
      ---------------------------------------- -}

      HandleMark hm(this);

  {- -------------------------------------------
  (1) 
      ---------------------------------------- -}

      // We could get here with a pending exception, if so clear it now.
      if (this->has_pending_exception()) {
        this->clear_pending_exception();
      }

  {- -------------------------------------------
  (1) (assert) (See: ExceptionMark)
      ---------------------------------------- -}

      EXCEPTION_MARK;

  {- -------------------------------------------
  (1) JavaCalls::call_static() 経由で
      java.lang.Shutdown.shutdown() を呼び出し, 
      finalizer を実行させる.

      (ただし, SystemDictionary::resolve_or_null() 中で例外が発生した場合は
      java.lang.Shutdown が取得できないので, 何もしない)
      (とはいえ, shutdown hook の登録や runFinalizersOnExit() の呼び出しが行われた場合には, 
      その時点で java.lang.Shutdown はロードされるので, ここでの失敗はない??)
      ---------------------------------------- -}

      klassOop k =
        SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(),
                                          THREAD);
      if (k != NULL) {
        // SystemDictionary::resolve_or_null will return null if there was
        // an exception.  If we cannot load the Shutdown class, just don't
        // call Shutdown.shutdown() at all.  This will mean the shutdown hooks
        // and finalizers (if runFinalizersOnExit is set) won't be run.
        // Note that if a shutdown hook was registered or runFinalizersOnExit
        // was called, the Shutdown class would have already been loaded
        // (Runtime.addShutdownHook and runFinalizersOnExit will load it).
        instanceKlassHandle shutdown_klass (THREAD, k);
        JavaValue result(T_VOID);
        JavaCalls::call_static(&result,
                               shutdown_klass,
                               vmSymbols::shutdown_method_name(),
                               vmSymbols::void_method_signature(),
                               THREAD);
      }

  {- -------------------------------------------
  (1) 
      ---------------------------------------- -}

      CLEAR_PENDING_EXCEPTION;
    }