// A JavaThread is a normal Java thread

void JavaThread::initialize() {

  {- -------------------------------------------
  (1) フィールドの初期化
      (それ以外の処理も混じっている?? #TODO)

      (なお, ここの set_jni_functions() で 
       jni_functions() が返した値を _jni_environment.functions にセットしている.
       See: [here](no3059pIA.html) for details)
      ---------------------------------------- -}

      // Initialize fields

      // Set the claimed par_id to -1 (ie not claiming any par_ids)
      set_claimed_par_id(-1);

      set_saved_exception_pc(NULL);
      set_threadObj(NULL);
      _anchor.clear();
      set_entry_point(NULL);
      set_jni_functions(jni_functions());
      set_callee_target(NULL);
      set_vm_result(NULL);
      set_vm_result_2(NULL);
      set_vframe_array_head(NULL);
      set_vframe_array_last(NULL);
      set_deferred_locals(NULL);
      set_deopt_mark(NULL);
      set_deopt_nmethod(NULL);
      clear_must_deopt_id();
      set_monitor_chunks(NULL);
      set_next(NULL);
      set_thread_state(_thread_new);
      _terminated = _not_terminated;
      _privileged_stack_top = NULL;
      _array_for_gc = NULL;
      _suspend_equivalent = false;
      _in_deopt_handler = 0;
      _doing_unsafe_access = false;
      _stack_guard_state = stack_guard_unused;
      _exception_oop = NULL;
      _exception_pc  = 0;
      _exception_handler_pc = 0;
      _exception_stack_size = 0;
      _is_method_handle_return = 0;
      _jvmti_thread_state= NULL;
      _should_post_on_exceptions_flag = JNI_FALSE;
      _jvmti_get_loaded_classes_closure = NULL;
      _interp_only_mode    = 0;
      _special_runtime_exit_condition = _no_async_condition;
      _pending_async_exception = NULL;
      _is_compiling = false;
      _thread_stat = NULL;
      _thread_stat = new ThreadStatistics();
      _blocked_on_compilation = false;
      _jni_active_critical = 0;
      _do_not_unlock_if_synchronized = false;
      _cached_monitor_info = NULL;
      _parker = Parker::Allocate(this) ;

  {- -------------------------------------------
  (1) (デバッグ用の処理) (#ifndef PRODUCT 時にのみ実行)
      ---------------------------------------- -}

    #ifndef PRODUCT
      _jmp_ring_index = 0;
      for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) {
        record_jump(NULL, NULL, NULL, 0);
      }
    #endif /* PRODUCT */

  {- -------------------------------------------
  (1) (プロファイル情報取得用の初期化処理) (See: ThreadProfiler)
      ---------------------------------------- -}

      set_thread_profiler(NULL);
      if (FlatProfiler::is_active()) {
        // This is where we would decide to either give each thread it's own profiler
        // or use one global one from FlatProfiler,
        // or up to some count of the number of profiled threads, etc.
        ThreadProfiler* pp = new ThreadProfiler();
        pp->engage();
        set_thread_profiler(pp);
      }

  {- -------------------------------------------
  (1) フィールドの初期化
      (See: ThreadSafepointState::create())
      ---------------------------------------- -}

      // Setup safepoint state info for this thread
      ThreadSafepointState::create(this);

  {- -------------------------------------------
  (1) (デバッグ用の処理) (debug_only 時にのみ実行)
      ---------------------------------------- -}

      debug_only(_java_call_counter = 0);

  {- -------------------------------------------
  (1) フィールドの初期化
      ---------------------------------------- -}

      // JVMTI PopFrame support
      _popframe_condition = popframe_inactive;
      _popframe_preserved_args = NULL;
      _popframe_preserved_args_size = 0;

  {- -------------------------------------------
  (1) JavaThread::pd_initialize() を呼び出して, 
      プラットフォーム固有の初期化処理を(もしそんなものがあれば)実行しておく.
      ---------------------------------------- -}

      pd_initialize();
    }