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

[Corinna Vinschen]

On Dec  9 15:58, Stéphane Mbape via cygwin wrote:
> Hello,
> 
> While embeding luajit in a c  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"
> 
> There is a sample code below.
> 
> 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.


Thanks,
Corinna

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