Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm
Sender: cygwin-owner@sources.redhat.com
Date: Wed, 22 Nov 2000 12:31:44 -0800
From: "Zack Weinberg" <zackw@Stanford.EDU>
To: Chris Abbey <cabbey@bresnanlink.net>
Cc: Kelley Cook <Kelley.Cook@home.com>,
        "GCC-Bugs@gcc.gnu.org" <GCC-Bugs@gcc.gnu.org>,
        "GCC-patches@gcc.gnu.org" <GCC-patches@gcc.gnu.org>,
        Cygwin mailing list <Cygwin@sources.redhat.com>
Subject: Re: Reason for cygwin GCC 2.97 non-bootstrap found
Message-ID: <20001122123143.G820@wolery.stanford.edu>
References: <20001121195005.A17637@disaster.jaj.com> <200011211839.eALIdOd15553@ahmlir2.mail.eds.com> <20001121162522.G17712@wolery.stanford.edu> <20001121195005.A17637@disaster.jaj.com> <20001121171653.I17712@wolery.stanford.edu> <5.0.0.25.0.20001121195807.02cc7040@pop.bresnanlink.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5i
In-Reply-To: <5.0.0.25.0.20001121195807.02cc7040@pop.bresnanlink.net>; from cabbey@bresnanlink.net on Tue, Nov 21, 2000 at 08:04:19PM -0600

On Tue, Nov 21, 2000 at 08:04:19PM -0600, Chris Abbey wrote:
> At 17:16 11/21/00 -0800, Zack Weinberg wrote:
> >Uh oh, that means I don't understand what's going on.  Can you try
> >this augmented version of the test program, which probes things a bit
> >more thoroughly?  Now I want the output and the exit status.  [If you
> >know how, also try to turn on Cygwin's internal debug logging and tell
> >me what that reports.]
> >
> >zw
> 
> hth...

...
> mmap: error 0
> munmap: Invalid argument
> signal: error 0

Ah.  So we aren't actually unmapping anything when this happens.  I
could imagine the code getting confused and crashing because of that;
in any case, we're wasting tons of memory this way - it also means
that the "unmap huge chunk of memory all at once" trick won't work.

RTH is right, we shouldn't be pretending cygwin has anonymous mmap.
I'll see if I can't turn the test program into an improvement to the
autoconf test.

zw

--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe@sourceware.cygnus.com