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Date: Fri, 17 Aug 2012 10:25:06 -0400
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Please test snapshots
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On Fri, Aug 17, 2012 at 09:07:30AM +0000, Adam Dinwoodie wrote:
>Christopher Faylor wrote:
>> On Tue, Aug 14, 2012 at 12:48:03PM +0000, Adam Dinwoodie wrote:
>>> I'm still using this snapshot (I've had no reason to stop until now), and
>>> have hit this issue two out of the last five times running Cygwin ping.  The
>>> ping process is still visible in Process Explorer after hitting ^C.  There's
>>> no obvious difference between when ^C terminates the process and when it
>>> doesn't.
>>
>> I managed to duplicate this once a couple of days ago in a mintty/tcsh
>> process but I had a very hard time consistently hitting it.  So I wrote a
>> test case which ran ping repeatedly in a loop under mintty while another
>> process killed it.  Eventually, I could duplicate the problem in a few
>> minutes.  There were two problems, one illustrated by the "sigwaitinfo"
>> mentioned in another thread and another caused by a race.
>
>I'm seeing this much more regularly than that; it's pretty readily
>reproducible for me.

Yes, I got the fact that other people were able to duplicate the problem
easily.

>I've found leaving a couple of seconds between starting ping and trying
>to kill it, and leaving a couple of seconds between invocations, both
>help.  I've not tested that thoroughly, though; it might be something
>to play with for trying to build a test case, but certainly not
>something I'd rely on as a symptom for debugging without further
>verification.
>
>> After making some changes to signal handling, I ran the test case for an
>> afternoon without issue.
>>
>> The current snapshot has these changes.
>>
>> I'd appreciate feedback on whether or not this fixes this problem.
>
>I'm still seeing exactly the same issue having taken the 20120816 snapshot. If
>anything, I've been hitting the problem more.

I should have asked this before:  I don't think anyone has made it clear if they
are running the cygwin ping or the Windows one.  I've been assuming Cygwin.  Is
that correct?

cgf

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