DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 54NFtssd1136210
Authentication-Results: delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results: delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 54NFtssd1136210
Authentication-Results: delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=yKoZtmQp
X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A0D46385B805
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1748015753;
	bh=bZRaAEurzLqMIGqA9r/DnFjtNlAFa81xcESPz64c69U=;
	h=Date:To:cc:Subject:In-Reply-To:References:List-Id:
	 List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:
	 From:Reply-To:From;
	b=yKoZtmQphohQ9b9/cjzRzuH1JFTD50tNXWr3Jz3G1IYLRm19q1l37kKw/+gIUMKzY
	 u0V7Jl7wLqEG3J0uU2RVoEhoLwFl7hpRS3e9VU1Xpd0Pxlk3v8v/3OCTNt7jnMYaEv
	 Ij58MDzt52Ot5QoOev95K/ME7gBTisxeWVbxSoh8=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 286F43858C60
ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 286F43858C60
ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1748015725; cv=none;
 b=nxvPOS3O/cwV0VJhe723xCpHz5SxQ7F6WwToF5WkROJNO+OVKd/NeTTIK47sa/glsH4kyXm78WX33YZ9YEE3PkM0MqUoLCofx9AXGhi8CNRkOR2/Lm68IjkRqmOBm7ZVAyPtWIOcTc6lzYTnBBy5oH/7ocv30XTvial0jXPVBt8=
ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key;
 t=1748015725; c=relaxed/simple;
 bh=SFGKugOtHPMd3GPb+CA/VHQ70Xs10v7vRnkazdjW/34=;
 h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;
 b=U0iOkyxbRhXhG2SJRuA16ZYMUkXe7GlTyMDSV+UmlVlR11vigRaGXNPiAxfTtYKsoqEUrLV+3AdMhoKjZ5cBf5oePf1M2Z8/RTQ4zpWhZqU01pRGa0qeMfkV2H2SXIkO3txdyvCExV1O00dPgdJyx7q4kjPQxexbJS24SAhbNtY=
ARC-Authentication-Results: i=1; server2.sourceware.org
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 286F43858C60
Date: Fri, 23 May 2025 08:55:24 -0700 (PDT)
X-X-Sender: jeremyd AT resin DOT csoft DOT net
To: Yuyi Wang <Strawberry_Str AT hotmail DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: fork error when trying to call VirtualAlloc with size==0
In-Reply-To: <TYTPR01MB109230129A80A99434A9778CDF898A@TYTPR01MB10923.jpnprd01.prod.outlook.com>
Message-ID: <5e87e58d-a774-927d-fb5d-bf8b0498e311@jdrake.com>
References: <cb1b7e88-5d92-8b14-149c-701352594786 AT jdrake DOT com>
 <TYTPR01MB109230129A80A99434A9778CDF898A AT TYTPR01MB10923 DOT jpnprd01 DOT prod DOT outlook DOT com>
MIME-Version: 1.0
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.30
Precedence: list
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Jeremy Drake via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Jeremy Drake <cygwin AT jdrake DOT com>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

On Fri, 23 May 2025, Yuyi Wang wrote:

> On Fri, 23 May 2025, Jeremy Drake wrote:
> > Maybe.  MSYS2 doesn't generally advise to rebase on x86_64, but I think
> > Cygwin does as part of its setup/postinstall hooks.  As a hack, I was able
> > to work around this by setting the "dynamicbase" flag on the dlls (it's a
> > long story about why this helps rather than hurts in this particular case)
>
> I believe it is ASLR right? I thought cygwin doesn't support such DLLs on fork.

Right

> If it helps here, should I add this flag for all DLLs & EXEs compiled by Rust?

No.

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple