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Date: Mon, 11 Mar 2002 18:59:41 +0100
From: Corinna Vinschen <cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.3.9 bug in mmap MAP_PRIVATE followed by fork
Message-ID: <20020311185941.Y29574@cygbert.vinschen.de>
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On Fri, Mar 08, 2002 at 02:18:35PM -0800, Stephen Weeks wrote:
> 
> I am having a problem using mmap (... MAP_PRIVATE ...) followed by
> fork () in Cygwin DLL version 1.3.9.  The memory allocated by mmap
> does not appear to be available in the child.  A small C program that
> shows the problem is included below.  I would expect to see the
> program print
> 
> parent hello
> child hello
> 
> but instead it prints
> 
> parent hello
> child
> 
> I saw the thread at
> 
> 	http://sources.redhat.com/ml/cygwin/2001-04/msg00829.html
> 
> which seemed to indicate that a related problem had been fixed a while
> ago, but I am still seeing something strange.  I can use MAP_SHARED
> instead of MAP_PRIVATE, and then everything works, but I am in a
> situation where I want to use MAP_PRIVATE.

This should be solved in the devlopers sources.  Check out the next
developers snapshot.

Thanks for the test case,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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