GNU bug report logs - #9720
gdb-mi hangs

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michael Veksler <mveksler <at> tx.technion.ac.il>
To: bug-gnu-emacs <at> gnu.org
Subject: gdb-mi hangs
Date: Mon, 10 Oct 2011 20:50:50 +0200

[Message part 1 (text/plain, inline)]

Hello,

The behavior I see seems to be related to bug 6962. I attach a backtrace 
of the emacs process.

While trying out the latest emacs from the git repository (similarly, 
gdb from git) I encountered an hang. This happens when I debug my C++ 
code under the new gdb-mi interface.


I am no git expert and can't tell you the exact version of emacs. The 
last commit on my sandbox repository is:

commit 520888a9da6c3c27122c2597f757e88c81b97989
Author: Paul Eggert <eggert <at> cs.ucla.edu>
Date:   Fri Oct 7 00:23:44 2011 -0700

The hang happens when the inferior terminates.

Sometimes it helps to kill the GDB process and press ctrl-g. It did not 
help this time.

---

Thanks

Michael

[trace (text/plain, attachment)]

Message #10 received at 9720 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Michael Veksler <mveksler <at> tx.technion.ac.il>
Cc: 9720 <at> debbugs.gnu.org
Subject: Re: bug#9720: gdb-mi hangs
Date: Fri, 28 Oct 2011 20:19:25 -0400

I think this might have been fixed by the fix for bug#9839.
Please try the Emacs trunk or the 24.0.91 pretest when it appears and
let us know if you still see this issue.

Message #13 received at 9720 <at> debbugs.gnu.org (full text, mbox):

From: Michael Veksler <mveksler <at> tx.technion.ac.il>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 9720 <at> debbugs.gnu.org
Subject: Re: bug#9720: gdb-mi hangs
Date: Sun, 30 Oct 2011 15:43:42 +0200

Hello,

On 10/29/2011 02:19 AM, Glenn Morris wrote:
> I think this might have been fixed by the fix for bug#9839.
> Please try the Emacs trunk or the 24.0.91 pretest when it appears and
> let us know if you still see this issue.
>
I am not 100% positive whether this fixed the issue or not. I am no 
longer able to
reproduce the exact scenario with the older emacs. When I try then emacs 
takes
100% CPU but no longer hang, which is similar but not identical to the 
reported
issue.

With the newest emacs from git, it no longer takes 100% CPU when the 
inferior
terminates. This is a substantial improvement but I am not sure that the 
update
fixes the same bug I previously saw. I suspect that there were two 
related bugs,
and the developers fixed the bug that used to trigger the second one. It 
is just
a hunch; I can't back it up.

I'll work with the newer emacs and report if the issue recurs.

--
Michael

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