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Re: Intermittent failures retrieving process exit codes - snapshot test requested

On Fri, Dec 21, 2012 at 11:23:00PM +0100, marco atzeri wrote:
>On 12/21/2012 8:36 PM, Christopher Faylor wrote:
>> On Fri, Dec 21, 2012 at 06:02:19PM +0100, Corinna Vinschen wrote:
>>> On Dec 21 11:10, Christopher Faylor wrote:
>>>> On Fri, Dec 21, 2012 at 11:32:41AM +0100, Corinna Vinschen wrote:
>>>>> Maybe the signal thread should really not exit by itself, but just
>>>>> wait until the TerminateThread is called.  Chris?
>>>> If the analysis is correct, that just fixes one symptom doesn't it?
>>>> There are potentially many threads running in any Cygwin program
>>>> and it sounds like any one of them could trigger this.
>>> Right.  I guess the question is how to synchronize things so that the
>>> thread calling TerminateProcess is actually the last one, making sure
>>> its return value is used.
>>> Maybe the NtQueryInformationThread(ThreadAmILastThread) call is of some
>>> help.  Or we have to keep all thread IDs of the self-started threads
>>> available to terminate them explicitely at process exit.
>> I checked in a complicated fix for this problem which only affected
>> Cygwin-created threads.  But, then, I thought about another riskier but
>> simpler fix.  That version is now in CVS and I'm generating a new
>> snapshot with it.
>> I tested this lightly on Windows 7 and 32-bit XP but it would be nice to
>> hear if multi-threaded things like X work on other platforms too.
>> If you test a snapshot, note that I'm still tracking down Ken Brown's
>> reporte emacs regression in recent snapshots so that will still be
>> broken.
>> cgf
>I think the Xserver doesn't like it.
>on 20121221 it freezes on start on W7/64
>no issue on 20121218

I acdtually tried Xserver before submitting my change so it certainly isn't
a consistent problem.


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