DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 54MHIPEX306410
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 54MHIPEX306410
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=ysOcRH7u
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 07C423857C6E
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1747934304;
	bh=DKqNuNm3csS3WjG78PPaJDqOCht2FhD5VvWhDGiOsfo=;
	h=Date:To:Subject:In-Reply-To:References:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=ysOcRH7uN2CyBVPE9JlQoDvMCMK77VNDMDctU7vWkUoZy91saOvWXdRKmTlcu2RAE
	HI1GKYOllfAX+G+TKg22kbjbooPV9YbFQJHfv/CCFvd3ye+0KXbJ7jsuGf4JBZzMgR
	FRbsbK5tc1HG6MLNSyNsrrwToxxMcnJ9QJrrsdIk=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org 3A01D3858023
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org 3A01D3858023
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1747934237; cv=none;
	b=cIqlQrzxd/z7fAn+TbfGNEP1ACm2h4giFNBhUyG7RknFqrvqxJRegwTkjGhWqB0dOmpR3EJ24D+su5PDQGTdAb1JjGh8Cd1X+vTySEx2pavPvyS0bBIWLI1xxYGABD3kl41iDtT65zhdRE9LT1zWUfVukPh9IRJDTCbnJnBc33A=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1747934237; c=relaxed/simple;
	bh=DUyzOKZHiVnxCcuCZUeAWZ30sXfkqjcCjjPW9Z+Myis=;
	h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;
	b=TS421NxHMSuVH0WibqwKADXG57dnloEU8PIdzOWvxJuHytYxodf5cw+sMOZ5RxktVG4mJ7e9xeGf84VEDQDaf3LSTlLZeigl4+alNgENnHMN4MFF00MfAk5w3XZvpIpsTlcyImu2J3tYL93eA/0FoPGsapd8AMA4/jEe3eVRhOM=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 3A01D3858023
Date:	Thu, 22 May 2025 10:17:16 -0700 (PDT)
X-X-Sender:	jeremyd AT resin DOT csoft DOT net
To:	cygwin AT cygwin DOT com
Subject:	Re: fork error when trying to call VirtualAlloc with size==0
In-Reply-To:	<2574093e-922e-c9a3-2be0-c7cb2a829106@jdrake.com>
Message-ID:	<58358b38-9bdc-0f7b-7f65-fb158147abdf@jdrake.com>
References:	<9635a215-9e5a-e725-cbe1-595f508032f6 AT jdrake DOT com>
	<TYCPR01MB10926705B7D31BB79B1DD1543F89FA AT TYCPR01MB10926 DOT jpnprd01 DOT prod DOT outlook DOT com>
	<e5f949fe-70cf-f7a8-f208-dcce44cb4538 AT jdrake DOT com>
	<2574093e-922e-c9a3-2be0-c7cb2a829106 AT jdrake DOT com>
MIME-Version:	1.0
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.30
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>
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 Wed, 21 May 2025, Jeremy Drake via Cygwin wrote:

> On Wed, 21 May 2025, Jeremy Drake via Cygwin wrote:
>
> > the child to not be very fruitful, but maybe there's some debugging to be
> > done there
>
> Well, found the bug that results in a 0 size.  size is a DWORD, but
> mb.RegionSize is 0x200000000.  mb.RegionSize is SIZE_T, but I figure
> size_t is appropriate.

I've sent a patch
https://cygwin.com/pipermail/cygwin-patches/2025q2/013726.html for review.
Now I get the correct error message:
    0 [main] rustc 1569 child_info_fork::abort: unable to remap
\??\V:\rust\rustc-nightly-src\build-MSYS\x86_64-pc-cygwin\stage0-rustc\release\deps\tracing_attributes-0e8ab81319ad49f1.dll
(using V:\rust\rustc-nightly-src\build-MSYS\x86_64-pc-cygwin\stage0-rustc\release\deps\tracing_attributes-0e8ab81319ad49f1.dll)
to same address as parent (0x2090000) - try running rebaseall

Ultimately, playing whack-a-mole in a 64-bit address space hoping that the
DLL will load in the same place as the parent is an exercise in futility,
especially in only 6 attempts.

-- 
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

- Raw text -