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From: "simark at simark dot ca" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/27710] remote-notif.c:113: internal-error: void
 remote_async_get_pending_events_handler(gdb_client_data): Assertion
 `target_is_non_stop_p ()' failed
Date: Wed, 14 Apr 2021 17:03:24 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27710

--- Comment #15 from Simon Marchi <simark at simark dot ca> ---
(In reply to Tom de Vries from comment #14)
> I just stumbled upon remote_unpush_target, and it seems one remote_target
> can be associated with multiple inferiors.  So at this point I'm not sure
> how one would select the "right" inferior.

Indeed, one remote target can handle multiple inferiors (if using
extended-remote).
The right inferior in this case would be any inferior of that target.  Maki=
ng
any inferior of this remote target the current inferior implicitly makes th=
is
remote target the current one, such that target_is_non_stop_p will hit that
remote target.  If the current inferior is one that does not belong to that
remote target, then target_is_non_stop_p is really asking whether some other
unrelated target is non-stop.

So adding a call to switch_to_target_no_thread should make it work (it just
makes an arbitrary inferior of the target the current one).

Another option, instead of switching the current inferior, would be to make
target_is_non_stop accept a target:

  gdb_assert (target_is_non_stop_p (notif_state->remote));

And pass down the target to everything below.  It would be a bit more work,=
 and
we would have to make sure everything called by target_is_non_stop_p doesn't
use the global context.

This looks like a problem that happens quite rarely though, it would be nic=
e to
have a way to reproduce it all the time, by adding some delay somewhere or
otherwise.

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