JNIEXPORT jlong JNICALL
Java_sun_management_VMManagementImpl_getMethodDataSize
  (JNIEnv *env, jobject dummy)
{

  {- -------------------------------------------
  (1) JMM_METHOD_DATA_SIZE_BYTES を引数として, jmm_GetLongAttribute() を呼び出すだけ.
      ---------------------------------------- -}

        return jmm_interface->GetLongAttribute(env, NULL,
                                               JMM_METHOD_DATA_SIZE_BYTES);
    }