anchor.diff:  
   all() -> 
       [t_lttng_list,
  +     t_memory_carrier,
        t_carrier_pool,
        t_async_io_pool,
        t_driver_start_stop,
  
positive.code: %% com_ericsson_otp:driver_stop
  t_driver_start_stop(Config) ->
      ok = lttng_start_event("com_ericsson_otp:driver_*", Config),
      Path = proplists:get_value(priv_dir, Config),
      Name = filename:join(Path, "sometext.txt"),
      Bin  = txt(),
      ok = file:write_file(Name, Bin),
      {ok, Bin} = file:read_file(Name),
      Res = lttng_stop_and_view(Config),
      ok = check_tracepoint("com_ericsson_otp:driver_start", Res),
      ok = check_tracepoint("com_ericsson_otp:driver_stop", Res),
  
negative.code: %% com_ericsson_otp:driver_ready_output
  t_driver_ready_input_output(Config) ->
      ok = lttng_start_event("com_ericsson_otp:driver_ready_*", Config),
      timer:sleep(500),
      Me = self(),
      Pid = spawn_link(fun() -> tcp_server(Me, active) end),
      receive {Pid, accept} -> ok end,
  