Re: [PATCH] Add a timeout parameter to gdb_do_one_event

[Tom Tromey <tom@tromey.com>]

>>>>> "Patrick" == Patrick Monnerat via Gdb-patches <gdb-patches@sourceware.org> writes:

Patrick> From what I can see in check_async_event_handlers, there is no direct
Patrick> waiting. The only delay/suspension can only come from an invoked
Patrick> handler while serving an event that is already active.

Yes, but there's a hack in prepare_to_wait that works around targets
that have not implemented async:

  /* If the target can't async, emulate it by marking the infrun event
     handler such that as soon as we get back to the event-loop, we
     immediately end up in fetch_inferior_event again calling
     target_wait.  */
  if (!target_can_async_p ())
    mark_infrun_async_event_handler ();

These targets will block in their wait method.

It would be good to convert all targets to be async, but that's hard,
partly because some targets aren't maintained, and also because for
remote-sim it would require a pretty big rewrite.

Tom