// Threads_lock NOT held, java_thread not protected by lock
// java_thread - pre-checked
// java_thread - unchecked
// depth - pre-checked as non-negative
// value_ptr - pre-checked for NULL

jvmtiError
JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {

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

      JavaThread* current_thread = JavaThread::current();
      // rm object is created to clean up the javaVFrame created in
      // doit_prologue(), but after doit() is finished with it.
      ResourceMark rm(current_thread);

  {- -------------------------------------------
  (1) VM_GetOrSetLocal を呼び出して, 指定された局所変数の値を取得する.
      取得に成功したら, 結果を value_ptr 引数が指している箇所に書き込んでリターン.
      (取得に失敗したら, VM_GetOrSetLocal のエラー値をそのままリターンするだけ)
      ---------------------------------------- -}

      VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
      VMThread::execute(&op);
      jvmtiError err = op.result();
      if (err != JVMTI_ERROR_NONE) {
        return err;
      } else {
        *value_ptr = op.value().l;
        return JVMTI_ERROR_NONE;
      }
    } /* end GetLocalObject */