Date: Mon, 19 Mar 2012 16:54:33 -0400
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: cygwin-1.7.10-1 fork - address space needed by ... already in use
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On Fri, Mar 16, 2012 at 01:14:26PM -0400, Christopher Faylor wrote:
>On Fri, Mar 09, 2012 at 10:48:30AM -0500, Christopher Faylor wrote:
>>On Thu, Mar 08, 2012 at 10:55:35AM +0100, Corinna Vinschen wrote:
>>>On Mar  8 09:50, Denis Excoffier wrote:
>>>> On Wed, Mar 07, 2012 at 06:47:49PM +0100, Corinna Vinschen wrote:
>>>> >> Hi Denis,
>>>> >> 
>>>> >> can you please test this again using the latest developer snapshot or
>>>> >> the current from CVS if you build Cygwin by yourself?  It provides a bit
>>>> >> more information to find the reason for the permission denied error in
>>>> >> _pinfo::dup_proc_pipe.
>>>> Thank you cgf (the committer and snapshot maker at least).
>>>> >> 
>>>> >> In theory, the user should have permissions to duplicate handles into
>>>> >> every own process, if the handle has been opened with these permissions,
>>>> >> so it's quite interesting to find the reason.
>>>> >> 
>>>> 
>>>> After about 3 hours of exercising the new snapshot (and shaking it a
>>>> little), i met the "something failed" instance only twice:
>>>> 
>>>>       1 [main] tcsh 7648! _pinfo::dup_proc_pipe: (child_info_spawn::worker) process synchronization failed for pid 7648/0x754, wr_proc_pipe 0x0 vs. 0x764: DuplicateHandle winerr 5, WFSO returned 258, Win32 error 5
>>>>     503 [main] tcsh 6148! _pinfo::dup_proc_pipe: (child_info_spawn::worker) process synchronization failed for pid 6148/0x758, wr_proc_pipe 0x0 vs. 0x768: DuplicateHandle winerr 5, WFSO returned 258, Win32 error 5
>>>> 
>>>> I continue, of course.
>>>
>>>Thanks, I don't think it's necessary to try further.  What this shows is
>>>that the process handle returned by the call to CreateProcess sometimes,
>>>for some reason, does not allow handle duplication.  That's weird.
>>
>>I have a vague idea about why this is happening.  I'll look into it within
>>the next 48 hours.
>
>My vague idea about this proved to be incorrect.  I did manage to make a
>royal mess of the exec synchronization code before I figured that out
>though so at least that's something.
>
>Denis, did you see this while running the STC in
>
>http://cygwin.com/ml/cygwin/2012-02/msg00187.html
>
>?
>
>Also, I checked back through the archives but didn't see any cygcheck
>output from you.  Maybe I just missed it but would you mind sending it
>here?
>
>To see if I could duplicate this, I created a STC which rapidly forked a
>bunch of processes which also execed themselves.  I could never get this
>error to show up though.

Thanks for the cygcheck output.

I was never able to duplicate the problem so I rewrote the way this was
handled.  The error message is completely gone now.

With luck you won't see anything like this now.

cgf

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