X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Date: Mon, 29 Aug 2011 15:54:35 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: STC for libapr1 failure
Message-ID: <20110829135435.GA31869@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <4E56EB24 DOT 5000505 AT acm DOT org> <20110826111509 DOT GH10490 AT calimero DOT vinschen DOT de> <20110827203706 DOT GA15411 AT calimero DOT vinschen DOT de> <4E596F50 DOT 3050205 AT acm DOT org>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <4E596F50.3050205@acm.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Aug 27 15:27, David Rothenberger wrote:
> On 8/27/2011 1:37 PM, Corinna Vinschen wrote:
> > On Aug 26 13:15, Corinna Vinschen wrote:
> >> On Aug 25 17:39, David Rothenberger wrote:
> >>> For a while now, the test cases that come with libapr1 have been
> >>> bombing with this message:
> >>>
> >>>   *** fatal error - NtCreateEvent(lock): 0xC0000035
> >>>
> >>> I finally took some time to investigate and have extracted a STC
> >>> that demonstrates the problem.
> >>
> >> Thanks a lot for the testcase.  In theory, the NtCreateEvent call should
> >> not have happened at all, since it's called under lock, and the code
> >> around that should have made sure that the object doesn't exist at the
> >> time.
> >>
> >> After a few hours of extrem puzzlement, I now finally know what happens.
> >> It's kinda hard to explain.
> >>
> [... very good description of flock problem ...]
> > 
> > Please test the latest snapshot.  It should fix this problem, as well as
> > a starvation problem with signals (and, fwiw, thread cancel events) in
> > flock, lockf, and POSIX fcntl locks.
> 
> The new snapshot runs the flock STC. Thanks!
> 
> I've been building libapr1 without F_SETLK support for a while since
> it was also triggering the "NtCreateEvent(lock): 0xC0000035"
> error. Since you mentioned fcntl, I tried re-enabling the fcntl
> mutexes. They still trigger the error.
> 
> I've attached a similar STC that uses fcntl instead of flock.

I made a couple more changes to the file locking code to accommodate
POSIX locks as well.  Please test the today's developer snapshot,
which I'm just creating.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple