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Re: assertion failure in the glibc

From: Justus Winter
Subject: Re: assertion failure in the glibc
Date: Thu, 28 Aug 2014 12:04:24 +0200
User-agent: alot/0.3.5

Quoting Samuel Thibault (2014-08-27 21:53:39)
> Hello,
> Justus Winter, le Mon 05 May 2014 14:10:48 +0200, a écrit :
> > I believe I have found two problems in the glibc.
> > 
> > 1. hurd_check_cancel takes 'lock', and then asserts that
> >    'critical_section_lock' is not taken.  However, hurd_thread_cancel
> >    first takes 'critical_section_lock' and then 'lock'.  This program
> >    demonstrates this by spinning on both functions.
> Indeed, it's another instance of the issue worked around in
> t/thread-cancel. Roland, this is the reproducer you were asking for in 
> http://lists.gnu.org/archive/html/bug-hurd/2006-08/msg00019.html

This problem also blocks a patch I have that introduces more
fine-graded locking into libpager (or libports...? or both...).


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