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Date: Sat, 9 Dec 2017 18:48:19 +0300
From: Andrey Repin <anrdaemon AT yandex DOT ru>
Reply-To: cygwin AT cygwin DOT com
Message-ID: <15510444518.20171209184819@yandex.ru>
To: =?utf-8?Q?St=C3=A9phane_Mbape?= <smbape AT yahoo DOT fr>, cygwin AT cygwin DOT com
Subject: Re: fork fails after nmap with hint address in an unmapped memory region
In-Reply-To: <b431898c-30f5-2847-c922-0f25a525ef76@yahoo.fr>
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Greetings, Stéphane Mbape!

> 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.

You forgot to mention Cygwin version you're using, and please provide the
sample as an attach to save people the copy-pasting issues.


-- 
With best regards,
Andrey Repin
Saturday, December 9, 2017 18:47:12

Sorry for my terrible english...
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