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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Wed, 21 Jul 2004 14:47:28 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
Subject: Re: MapViewOfFileEx errors with cygwin1-20040716 snapshot
In-Reply-To: <20040721082614.GD21800@cygbert.vinschen.de>
Message-ID: <Pine.GSO.4.58.0407211411270.22264@slinky.cs.nyu.edu>
References: <87n01xzci1 DOT fsf AT vzell-de DOT de DOT oracle DOT com> <20040719045351 DOT GA9614 AT trixie DOT casa DOT cgf DOT cx> <878ydgxozc DOT fsf AT vzell-de DOT de DOT oracle DOT com> <20040720114946 DOT GJ11473 AT cygbert DOT vinschen DOT de> <87briass3b DOT fsf AT vzell-de DOT de DOT oracle DOT com> <20040720151642 DOT GL11473 AT cygbert DOT vinschen DOT de> <Pine DOT GSO DOT 4 DOT 58 DOT 0407202057250 DOT 10093 AT slinky DOT cs DOT nyu DOT edu> <20040721082614 DOT GD21800 AT cygbert DOT vinschen DOT de>
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On Wed, 21 Jul 2004, Corinna Vinschen wrote:

> On Jul 20 21:03, Igor Pechtchanski wrote:
> > On Tue, 20 Jul 2004, Corinna Vinschen wrote:
> >
> > > On Jul 20 15:53, Dr. Volker Zell wrote:
> > > > Well my MapViewOfFileEx errors are still there, but that seems to
> > > > be a different problem.
> > >
> > > I tried to reproduce that problem with my shm test application which
> > > forks twice, but to no avail.
> > >
> > > A simple testcase(tm) would be helpful.
> > >
> > > Corinna
> >
> > Corinna,
> >
> > FWIW, I just saw this error for the first time with the above snapshot
> > (Win2k SP3).  The command that triggered it was a "cvs diff" run from vim
> > (":!cvs diff"), if it makes any difference.  No idea what caused it, since
>
> It makes a difference.  FWIW, Volker's message is printed from a function
> which only runs in case a process is using XSI shared memory and forks.
> cvs doesn't use XSI shared memory so the message you saw is very likely
> emitted by open_shared.

Actually, this is what's weird.  The messages from open_shared() and
fixup_shms_after_fork() are subtly different, and I don't recall the name
of the shared region (or, for that matter, anything in single quotes)
being printed, so I guess the message came from fixup_shms_after_fork().
I've since tried to reproduce it under strace, and failed.  The three
times I saw the message, one was from inside cvs.exe, and two were from
inside ssh.exe, if that helps any.  The next time I get this error, I'll
copy/paste the exact message and the exact sequence of actions that led to
it.  Please let me know what else I can do to help track this down.
	Igor
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