fork fails after nmap with hint address in an unmapped memory region

[Corinna Vinschen]

On Dec 10 16:29, Houder wrote:
> On Sun, 10 Dec 2017 14:31:09, Corinna Vinschen wrote:
> > --0eh6TmSyL6TZE2Uz
> > Content-Type: text/plain; charset=utf-8
> > Content-Disposition: inline
> > Content-Transfer-Encoding: quoted-printable
> > 
> > On Dec  9 15:58, St=C3=A9phane Mbape via cygwin wrote:
> > > Hello,
> > >=20
> > > While embeding luajit in a c=C2=A0 program, I found myself unable to fork
> > > processes.
> > > Investigations prove that it was related to nmap.
> > > To be accurate, calling nmap with hint address in a unmapped memory region
> > > will cause all forks to fail with
> > > "fixup_mmaps_after_fork: ReadProcessMemory failed for MAP_PRIVATE address
> > > 0x6FFFFFE0000, Win32 error 299"
> > >=20
> > > There is a sample code below.
> > >=20
> > > Thank you for reading.
> > 
> > Thank you for the testcase.  I pushed a patch and uploaded new developer
> > snapshots to https://cygwin.com/snapshots.  Please test.
> 
> Reference:
> 
>     https://cygwin.com/ml/cygwin/2017-12/msg00011.html
> 
> It might not help Stéphane, but it works for me ...
> 
> Henri

That's... surprising.  But good to know.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat
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