JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))

  {- -------------------------------------------
  (1) (デバッグ用の処理)
      (See: JNIWrapper)
      ---------------------------------------- -}

      JNIWrapper("GetObjectRefType");

  {- -------------------------------------------
  (1) (DTrace のフック点)
      ---------------------------------------- -}

      DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj);

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

      jobjectRefType ret;

  {- -------------------------------------------
  (1) 以下の順番で各 JNIHandles 内を調べる.
      どこにも入っていなければ, 返値は JNIInvalidRefType とする.

      * JNIHandles::is_local_handle(), JNIHandles::is_frame_handle()
      * JNIHandles::is_global_handle()
      * JNIHandles::is_weak_global_handle()
      ---------------------------------------- -}

      if (JNIHandles::is_local_handle(thread, obj) ||
          JNIHandles::is_frame_handle(thread, obj))
        ret = JNILocalRefType;
      else if (JNIHandles::is_global_handle(obj))
        ret = JNIGlobalRefType;
      else if (JNIHandles::is_weak_global_handle(obj))
        ret = JNIWeakGlobalRefType;
      else
        ret = JNIInvalidRefType;

  {- -------------------------------------------
  (1) (DTrace のフック点)
      ---------------------------------------- -}

      DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret);

  {- -------------------------------------------
  (1) 結果をリターン
      ---------------------------------------- -}

      return ret;
    JNI_END