void
JvmtiEnvBase::initialize() {

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

      assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");

  {- -------------------------------------------
  (1) この JvmtiEnvBase オブジェクトを
      JvmtiEnvBase::_head_environment フィールドのリストにつないでおく
      (これは生成された全ての JvmtiEnv オブジェクトをつないでおくリスト)
      ---------------------------------------- -}

      // Add this environment to the end of the environment list (order is important)
      {
        // This block of code must not contain any safepoints, as list deallocation
        // (which occurs at a safepoint) cannot occur simultaneously with this list
        // addition.  Note: No_Safepoint_Verifier cannot, currently, be used before
        // threads exist.
        JvmtiEnvIterator it;
        JvmtiEnvBase *previous_env = NULL;
        for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) {
          previous_env = env;
        }
        if (previous_env == NULL) {
          _head_environment = this;
        } else {
          previous_env->set_next_environment(this);
        }
      }

  {- -------------------------------------------
  (1) まだ大域的な初期化が終わっていなければ
      JvmtiEnvBase::globally_initialize() で実行しておく.
      ---------------------------------------- -}

      if (_globally_initialized == false) {
        globally_initialize();
      }
    }