X-Recipient:	archive-cygwin AT delorie DOT com
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.3.2 sourceware.org 7C9173858009
Authentication-Results:	sourceware.org;
	dmarc=none (p=none dis=none) header.from=maxrnd.com
Authentication-Results:	sourceware.org; spf=none smtp.mailfrom=mark AT maxrnd DOT com
Subject:	Re: segfault on 32bit cygwin snapshot
To:	cygwin AT cygwin DOT com
References:	<9d7b9dc2-cb92-498b-7655-e9c618114c87 AT gmail DOT com>
	<20210221072954 DOT db2dcbd523ed366e4dfcb0d0 AT nifty DOT ne DOT jp>
	<7480c946-8e02-aba2-c06f-6b39f630699f AT gmail DOT com>
	<20210301095546 DOT dce31a474bd0cec2c3518f87 AT nifty DOT ne DOT jp>
	<20210301212542 DOT 8b1749f92af62c01b008f25a AT nifty DOT ne DOT jp>
	<20210302200308 DOT 62db4fe01f78fb35a538784f AT nifty DOT ne DOT jp>
	<YD5eXbxBWbUUSwcM AT calimero DOT vinschen DOT de>
	<20210303185621 DOT b048287526901af6a4c8200a AT nifty DOT ne DOT jp>
	<YD9sSea32T7GqlJr AT calimero DOT vinschen DOT de>
	<20210304180534 DOT 7c3825e6ee989a2bf62f0652 AT nifty DOT ne DOT jp>
	<CAB8Xom-HwxH9LnbLL8cAoXh60tjU592T6XFEDJzvhv28Do-UsQ AT mail DOT gmail DOT com>
	<20210304205000 DOT 4ac34afe1a8b767ea2986291 AT nifty DOT ne DOT jp>
	<b7338aaa-c1e1-1816-35f8-666c2f6ac618 AT cornell DOT edu>
	<98df59b3-a139-03d2-c8c5-31ff4f8448ab AT gmail DOT com>
	<625cb9d2-b6cc-3ada-eea9-44a5e73da17c AT gmail DOT com>
From:	Mark Geisert <mark AT maxrnd DOT com>
Message-ID:	<72a86908-e150-2070-24f7-79ca82de9916@maxrnd.com>
Date:	Fri, 5 Mar 2021 01:11:40 -0800
User-Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101
	Firefox/52.0 SeaMonkey/2.49.4
MIME-Version:	1.0
In-Reply-To:	<625cb9d2-b6cc-3ada-eea9-44a5e73da17c@gmail.com>
X-Spam-Status:	No, score=-3.0 required=5.0 tests=BAYES_00, BODY_8BITS,
	KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, NICE_REPLY_A, SPF_HELO_NONE,
	SPF_NONE, TXREP autolearn=no autolearn_force=no version=3.4.2
X-Spam-Checker-Version:	SpamAssassin 3.4.2 (2018-09-13) on
	server2.sourceware.org
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.29
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>
Errors-To:	cygwin-bounces AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces AT cygwin DOT com>
X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id 1259Bt2d006838

Marco Atzeri via Cygwin wrote:
> On 04.03.2021 21:17, Marco Atzeri wrote:
>> On 04.03.2021 16:17, Ken Brown via Cygwin wrote:
>>> On 3/4/2021 6:50 AM, Takashi Yano via Cygwin wrote:
>>>> On Thu, 4 Mar 2021 12:11:11 +0100
>>>> marco atzeri wrote:
>>>>> I have no problem to patch Python to solve the issue,
>>>>> but I have not seen evidence of the dlsym mechanism .
>>>>> But of course I an NOT and expert in this field.
>>>>>
>>>>> If someone looking to the code can give me some hints,
>>>>> I will appreciate
>>>>
>>>> I am also not sure where the dlsym() is used in python.
>>>> At least, os.uname() works in python 3.8.7 and 2.7.18 in my
>>>> environment even without that snippet. It seems that os.uname()
>>>> does not use dlsym(). Do I overlook something?
>>>
>>> This all started because Mark reported a problem building python 3.8.3:
>>>
>>>    https://cygwin.com/pipermail/cygwin-apps/2020-December/040765.html
>>> https://cygwin.com/pipermail/cygwin-developers/2020-December/012019.html
>>>
>>> It's strange that Marco never bumped into the problem.
>>>
>>> Ken
>>
>> I never built python using cygwin snapshots as Mark was trying to do,
>> all my builds were using 3.1.7.
>>
>> Let me set a separate enviroment for building on latest snapshot
> 
> I can not replicate with latest snapshot
> 
> $ uname -svr
> CYGWIN_NT-10.0-WOW 3.2.0s(0.340/5/3) 2021-03-01 15:42
> 
> nor in 64bit when building 3.8.8
> 
> For what I see the DLL is always using a proper import
> from cygwin1.dll
> 
> $ objdump -x libpython3.8.dll |grep uname
>          2b9de0   2170  uname
>          2b9de8   2171  uname_x
> 
> the only thing not standard on my build system is a case sensitive
> filesystem and mount

I had concerns that I had somehow corrupted my build environment, and it was 
Marco's successes that convinced me to reinstall 3.1.7 to recover a known-good 
environment.  Then seeing Marco go ahead and release the different Python releases 
(yay!) I didn't investigate any further.

I'm now trying to locate the os.uname usage of dlopen/dlsym again just for the 
record but am having some difficulty.  I'll reply again when I've got it.
Thanks all,

..mark

--
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 -