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Message-Id: <6.1.2.0.0.20041028090536.01e9c470@localhost>
X-Sender: jdeifik AT weasel DOT com
Date: Thu, 28 Oct 2004 09:11:56 -0700
To: cygwin AT cygwin DOT com
From: jdeifik <jdeifik AT weasel DOT com>
Subject: Re: Problem with pthead.h - child's thread ending, causes main program to exit
In-Reply-To: <Pine.CYG.4.58.0410280941080.2868@fordpc.vss.fsi.com>
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>On Wed, 27 Oct 2004, jdeifik wrote:
>
> > I have a somewhat complex program that I rewrote to use pthreads.
> > It uses threads in a very simple fashion.
> >
> > Though I don't have much experience with pthreads, the program works fine
> > using mandrake 10.0 linux.
> >
> > Using cygwin and windows xp sp2, when one thread reaches the end
> > of execution, the entire program exits.
>
>And you know this is really what happens because...?
>
>Or, is it this bug?
>
>http://cygwin.com/ml/cygwin/2004-09/msg00257.html

Doesn't seem likely, as I never call pthread_join.
Perhaps it is called implicitly as a thread exits though.

>If so, then please try a snapshot:
>
>http://cygwin.com/snapshots/

The new cygwin1.dll fixed my problem.
Everything seems fine now.

> > When I run the program with gdb, I get really weird segmentation faults,
> > for example:
>
>http://www.cygwin.com/ml/cygwin/2004-10/msg01033.html
>
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to thread 3280.0xcdc]
> > 0x610b479d in random () from /usr/bin/cygwin1.dll
>[snip]
> > The details of the backtrace vary a bit, but always start off in random in
> > cygwin1.dll
>
>You can not trust the back trace from a stripped cygwin1.dll.  You must
>compile your own with debugging symbols if you want to see a valid trace
>into it.  (Hint: random is NOT where your problem is)

Ok, then perhaps a non-stripped cygwin1.dll should be supplied by default
so gdb can see what is happening.

> > I know others have problems with pthreads locking up main, but this seems
> > different to me.
>
>You should quote a reference here as I am not aware of any such issue.

there was a thread this week,

From: Ben Lavender <blavender at gmail dot com>
To: cygwin at cygwin dot com
Date: Thu, 21 Oct 2004 15:43:49 +0200
Subject: RE: problem with pthread.h - child thread's ending locks up main 
thread

Since this was from oct 21, and my email was from oct 27, and I quoted
the subject,  I didn't think I needed more context.

         Thanks,
         Jeff Deifik


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