Re: [PATCH] Improved ^c support for gdb/guile

[Mark Kettenis <mark.kettenis@xs4all.nl>]

> From: Doug Evans <xdje42@gmail.com>
> Date: Mon, 17 Feb 2014 02:39:25 -0500
> 
> Hi.
> 
> Here's my modest contribution to the Guile anniversary potluck.
> 
> The patch to selftest-support.exp could be done differently,
> I've tried to keep it simple.  The problem is that gdb with guile
> will get SIGPWR from time to time when Guile's GC kicks in,
> and we need this to not alter test behaviour.  The patch just
> tells the parent gdb to ignore SIGPWR, which is simple enough
> without loss of coverage.  A good question is what other signals
> Guile GC might use.

SIGPWR?  Doesn't exist on *BSD.  Guess it uses some other random
signal there?

Didn't realize Guile used threads.  I guess that's safe if the
interpreter makes sure it never calls into GDB code concurrently.  But
it does make debugging GDB harder.  And I hope this is not an excuse
for other people to start using threads in other bits of GDB.