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From: Peter Rehley <peter AT rehley DOT net>
Subject: Re: Hanging at GetModuleFileName in inside_kernel function
Date: Thu, 23 Feb 2006 08:19:41 -0800
To: cygwin AT cygwin DOT com
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Hi,
On Feb 23, 2006, at 3:20 AM, Corinna Vinschen wrote:

> On Feb 21 13:56, Peter Rehley wrote:
>> On Feb 21, 2006, at 11:31 AM, Dave Korn wrote:
>>
>>> On 21 February 2006 19:06, Peter Rehley wrote:
>>>
>>>> Hi,
>>>>
>>>> Well, for my particular hang issue cygwin is hanging inside the
>>>> inside_kernel function on the GetModuleFileName call.  I tracked  
>>>> this
>>>> down by adding debug statements (strace.prntf) until I got to the
>>>> point where the debug print before GetModuleFileName would  
>>>> appear and
>>>> the ones after it didn't. This is consistent.  Each hang is  
>>>> happening
>>>> at this spot.
>>>>
>>>> However, this doesn't explain what is happening, but only where.
>>>>
>>>> I also observed that the times it hung were the only times
>>>> inside_kernel was actually called.
>>>>
>>>> I'm still trying to get more information.
>>>> Peter
>>>>
>>>> p.s. using cygwin snapshot 1.5.19-20060205.
>
> Due to your problem report and some googling, I had some vague idea
> yesterday, what the problem could be.  But it's not clear if the very
> simple patch I applied yesterday does really change anything with
> respect to your problem.
>
> Please test the 2006-02-22 snapshot from http://cygwin.com/snapshots/
> and report if you see a change, to the good or to the bad.
>
>
Yeah, I saw that change, and I tried yesterdays snapshot but it still  
hung.  I also did some more googling and found that someone submitted  
a patch a few years ago.  The patch checked to see if it was inside  
the ntdll.dll by looking at the handle.
http://www.cygwin.com/ml/cygwin-patches/2003-q2/msg00004.html

I found this google too.
http://blogs.msdn.com/oldnewthing/archive/2004/01/28/63880.aspx

I'm going to try that patch today and see what happens.  Christopher  
didn't apply it because it was a bandage and didn't really fix the  
bigger problem.

Peter


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