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Subject: Re: fork fails after nmap with hint address in an unmapped memory region
To: cygwin AT cygwin DOT com
References: <b431898c-30f5-2847-c922-0f25a525ef76 AT yahoo DOT fr> <15510444518 DOT 20171209184819 AT yandex DOT ru>
From: "Stéphane Mbape via cygwin" <cygwin AT cygwin DOT com>
Reply-To: =?UTF-8?Q?St=c3=a9phane_Mbape?= <smbape AT yahoo DOT fr>
Message-ID: <42c71a45-e61b-6917-b634-e912fb51d2d5@yahoo.fr>
Date: Sat, 9 Dec 2017 16:53:29 +0100
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Sorry,

Cygwin version: 2.9.0
OS: Windows 10
Arch: 64bit

The sample was also attached.

Le 09/12/2017 à 16:48, Andrey Repin a écrit :
> 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.
>
>


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