From: Eli Zaretskii <eliz@gnu.org>
To: martin rudalics <rudalics@gmx.at>
Cc: claudio.bley@gmail.com, lekktu@gmail.com, 9087@debbugs.gnu.org
Subject: bug#9087: Crash reading from minibuffer with icomplete-mode
Date: Sat, 07 Jan 2012 12:49:56 +0200 [thread overview]
Message-ID: <831urbhjmz.fsf@gnu.org> (raw)
In-Reply-To: <4F081A6D.30508@gmx.at>
> Date: Sat, 07 Jan 2012 11:11:57 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: Stefan Monnier <monnier@iro.umontreal.ca>,
> Jason Rumney <jasonr@gnu.org>,
> claudio.bley@gmail.com, lekktu@gmail.com, 9087@debbugs.gnu.org
>
> >> Is a C-g also delayed in a similar way under w32?
> >
> > Yes, it is, at least in this case.
>
> Can you please explain what this means? If C-g is delayed does it mean
> that I can't use it to quit immediately? Or does it mean that I can
> crash Emacs via C-g in a similar way as with the OP's scenario?
The former, of course. You can verify yourself that, in Emacs without
the patch I sent, typing C-g when triggerbug.el says "now!" does not
cause a crash, but a "Quit", albeit a slightly (by 1-2 seconds on my
box) delayed one.
> Why and how is all this handled differently on GNU systems?
On Posix hosts, Emacs reads keyboard input in the main thread, where
it is possible to do a throw to top level without wreaking havoc on
the stack. In some configurations, keyboard input is actually handled
in a signal handler, and then the throw is even faster, because it
interrupts any on-going operation.
On Windows, there's a separate thread that reads messages posted by
Windows to the Emacs windows. Throwing to top level from a different
thread is a no-no. With my patch, throwing will be deferred until the
main thread is done with whatever it is doing, and gets to reading
input.
next prev parent reply other threads:[~2012-01-07 10:49 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-14 22:54 bug#9087: Crash reading from minibuffer with icomplete-mode Juanma Barranquero
2011-07-15 7:30 ` martin rudalics
2011-07-15 12:12 ` Juanma Barranquero
2011-07-15 12:23 ` martin rudalics
2011-07-15 16:40 ` Juanma Barranquero
2011-07-15 11:13 ` Eli Zaretskii
2011-07-15 12:11 ` Juanma Barranquero
2011-07-15 12:15 ` Juanma Barranquero
2011-07-15 12:29 ` Eli Zaretskii
2011-07-15 15:12 ` Juanma Barranquero
2011-07-15 15:24 ` Eli Zaretskii
2011-07-15 16:39 ` Juanma Barranquero
2011-07-15 17:12 ` Eli Zaretskii
2011-07-16 23:19 ` Juanma Barranquero
2011-07-17 3:08 ` Eli Zaretskii
2011-07-18 2:07 ` Juanma Barranquero
2011-07-18 3:01 ` Eli Zaretskii
2011-07-18 11:53 ` Juanma Barranquero
2011-07-18 16:45 ` Eli Zaretskii
2011-07-18 17:34 ` Juanma Barranquero
2011-07-17 9:38 ` martin rudalics
2011-07-18 1:59 ` Juanma Barranquero
2011-08-14 20:13 ` Chong Yidong
2011-09-14 14:43 ` Juanma Barranquero
2012-01-01 20:56 ` Claudio Bley
2012-01-01 21:24 ` Juanma Barranquero
2012-01-01 21:43 ` Eli Zaretskii
2012-01-02 16:16 ` Claudio Bley
2012-01-04 15:44 ` Claudio Bley
2012-01-06 10:02 ` Eli Zaretskii
2012-01-06 12:48 ` Juanma Barranquero
2012-01-06 13:19 ` martin rudalics
2012-01-06 13:26 ` Juanma Barranquero
2012-01-06 15:17 ` Eli Zaretskii
2012-01-06 16:07 ` martin rudalics
2012-01-06 19:01 ` Eli Zaretskii
2012-01-06 19:45 ` martin rudalics
2012-01-06 19:53 ` Eli Zaretskii
2012-01-06 20:50 ` Eli Zaretskii
2012-01-06 22:34 ` Juanma Barranquero
2012-01-07 0:42 ` Stefan Monnier
2012-01-07 8:31 ` Eli Zaretskii
2012-01-07 10:11 ` martin rudalics
2012-01-07 10:49 ` Eli Zaretskii [this message]
2012-01-07 11:51 ` martin rudalics
2012-01-07 12:21 ` Eli Zaretskii
2012-01-07 13:57 ` martin rudalics
2012-01-07 14:59 ` Eli Zaretskii
2012-01-07 16:27 ` martin rudalics
2012-01-07 17:05 ` Eli Zaretskii
2012-01-07 17:17 ` martin rudalics
2012-01-07 17:31 ` Eli Zaretskii
2012-01-07 17:45 ` martin rudalics
2012-01-07 17:52 ` Eli Zaretskii
2012-01-07 13:12 ` Andreas Schwab
2012-01-07 13:57 ` martin rudalics
2012-01-07 15:00 ` Eli Zaretskii
2012-01-07 18:21 ` Stefan Monnier
2012-01-07 18:59 ` Eli Zaretskii
2012-01-08 14:01 ` Stefan Monnier
2012-01-14 20:16 ` Eli Zaretskii
2012-01-07 10:10 ` martin rudalics
2012-01-07 10:58 ` Eli Zaretskii
2012-01-07 11:52 ` martin rudalics
2012-01-07 12:11 ` Eli Zaretskii
2012-01-07 13:55 ` martin rudalics
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