class DEBUGGER__::Session

def initialize
  @ui = nil
  @sr = SourceRepository.new
  @bps = {} # bp.key => bp
            #   [file, line] => LineBreakpoint
            #   "Error" => CatchBreakpoint
            #   "Foo#bar" => MethodBreakpoint
            #   [:watch, ivar] => WatchIVarBreakpoint
            #   [:check, expr] => CheckBreakpoint
  #
  @tracers = {}
  @th_clients = {} # {Thread => ThreadClient}
  @q_evt = Queue.new
  @displays = []
  @tc = nil
  @tc_id = 0
  @preset_command = nil
  @postmortem_hook = nil
  @postmortem = false
  @intercept_trap_sigint = false
  @intercepted_sigint_cmd = 'DEFAULT'
  @process_group = ProcessGroup.new
  @subsession_stack = []
  @subsession_id = 0
  @frame_map = {} # for DAP: {id => [threadId, frame_depth]} and CDP: {id => frame_depth}
  @var_map   = {1 => [:globals], } # {id => ...} for DAP
  @src_map   = {} # {id => src}
  @scr_id_map = {} # for CDP
  @obj_map = {} # { object_id => ... } for CDP
  @tp_thread_begin = nil
  @tp_thread_end = nil
  @commands = {}
  @unsafe_context = false
  @has_keep_script_lines = RubyVM.respond_to? :keep_script_lines
  @tp_load_script = TracePoint.new(:script_compiled){|tp|
    eval_script = tp.eval_script unless @has_keep_script_lines
    ThreadClient.current.on_load tp.instruction_sequence, eval_script
  }
  @tp_load_script.enable
  @thread_stopper = thread_stopper
  self.postmortem = CONFIG[:postmortem]
  register_default_command
end