Date: Fri, 17 Aug 2012 10:37:25 -0400
From: Christopher Faylor <cgf-use-the-mailinglist-please@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: False BLODA warning concerning cygusb?
Message-ID: <20120817143725.GD20284@ednor.casa.cgf.cx>
Reply-To: cygwin@cygwin.com
Mail-Followup-To: cygwin@cygwin.com
References: <502DA4D4.4040809@aa.net.uk> <20120817093920.GC26407@calimero.vinschen.de> <502E212E.10008@hones.org.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <502E212E.10008@hones.org.uk>
User-Agent: Mutt/1.5.20 (2009-06-14)
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
Precedence: bulk
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com

On Fri, Aug 17, 2012 at 11:47:10AM +0100, Cliff Hones wrote:
>On 17/08/2012 10:39, Corinna Vinschen wrote:
>
>> I have no problems with occassional false postives.  The detect_bloda
>> option is meant for diagnostic purposes only.  It's not meant to used
>> all the time.  It slows down *every* thread start up!
>
>Thanks.  I was only reporting it as I thought I remembered a request
>for false positives to be reported.  I think that's why I turned the
>detect_bloda option on in the first place.  I must admit I was also
>slightly curious - what is an open-source library (libusb) built
>under Cygwin doing that makes it look like BLODA? [Of course I
>could spend time looking at the source to find out, but time is
>in short supply, so I guess I'll just have to stay curious.]

Likely it's not starting threads using posix calls (pthread_create) but
using Windows ones (CreateThread).  That would imply that libusb assumes
that a Cygwin compilation means "build for Windows" rather than "built
for Linux".  Given that it is trying to access usb functionality, maybe
that makes sense and it might be a permanent false positive.

cgf

--
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