RFC: skip_inline_frames failed assertion resuming from breakpoint on LynxOS

[Joel Brobecker <brobecker@adacore.com>]

Hello,

I was wondering what you guys would think of a patch like this.
I am a bit uncertain, because I don't understand everything
that is happening - and the problem is that this is happening
with a fairly massive and complex program that I don't have access
to, on a system that is also fairly opaque. When I'm lucky, getting
answers is only very hard.

I am still trying to reproduce the problem locally in order to
find out more, but I couldn't understand why, in principle,
one thread couldn't receive multiple notifications during
the same single-step if the system decides to queue up signals?
If that were the case, wouldn't the attached patch make sense?
(currently untested against the program that triggered the issue,
as I think I understand how inline-frame works, and what it does,
but I am not sure I get it all).

Thank you!
-- 
Joel