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Date: Thu, 14 Nov 2013 10:19:50 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Intermittent failures retrieving process exit codes
Message-ID: <20131114091950.GC526@calimero.vinschen.de>
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References: <50C2498C DOT 2000003 AT coverity DOT com> <50C276AC DOT 9090301 AT mailme DOT ath DOT cx> <50D401EF DOT 9040705 AT coverity DOT com> <52844B2E DOT 5050902 AT coverity DOT com>
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Hi Tom,

On Nov 13 23:01, Tom Honermann wrote:
> On 12/21/2012 01:30 AM, Tom Honermann wrote:
> >[...]
> >When the race condition results in the undesirable outcome, the exit
> >code for the process is set to the exit code for the secondary thread's
> >call to ExitThread().  I can only speculate at this point, but my guess
> >is that the TerminateProcess() code disassociates the calling thread
> >from the process before other threads are stopped such that
> >ExitThread(), concurrently running in another thread, may determine that
> >the calling thread is the last thread of the process and overwrite the
> >process exit code.
> >[...]
>=20
> Time passes...
>=20
> I worked with some former colleagues to report this issue to
> Microsoft.  Windows 8.1 and Windows Server 2012 R2 contain a fix
> that addresses the test case above.  A hotfix has been made
> available for Windows 7 SP1 and Windows Server 2008 R2.  Should
> anyone desire a hotfix for other versions of Windows, it will be
> necessary to open a case with Microsoft to request it.
>=20
> http://support.microsoft.com/kb/2875501
>=20
> Tom.

thanks for letting us know!

I'm very glad to read that this is an OS bug and a fix is available.

At least partially.  I'm a bit confused.  As far as I understand it this
is the situation now:

  Vista/2008 and earlier:  no fix available.
  W7/2008R2:               only hotfix for manual installation
  W8/2012:                 no fix available.
  W8.1/2012R2:             fixed.

Did I get that right?  That sounds a bit weird...


Thanks again,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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