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From: "dje at google dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/17247] gdb freezes on multi threaded app (test-case
 attached)
Date: Sat, 23 Aug 2014 16:07:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=17247

--- Comment #14 from dje at google dot com ---
(In reply to Bernd Amend from comment #13)
> I encountered this issue on Archlinux with gdb 7.8.
> I bisected the issue to the commit
> 
> commit ed3ef33944c39d9a3cea72b9a7cef3c20f0e3461
> Author: Doug Evans <xdje42@gmail.com>
> Date:   Sun Feb 9 19:40:01 2014 -0800
> 
>     Add Guile as an extension language.
> 
> I hope this helps to track down the issue.

I'm not sure how much help a bisect can be here is the issue is a race
condition.
But you have given me an idea.
Guile uses a separate thread to help with garbage collection, and perhaps a
SIGCHLD is being lost somehow (or whatever).

Question: Does the bug go away if you configure gdb --without-guile?
[Assuming you've got guile installed and the buggy gdb was configured with it.]

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