From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.130]) by sourceware.org (Postfix) with ESMTPS id 77FC33AA9916 for ; Thu, 4 Mar 2021 15:54:41 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 77FC33AA9916 Received: from calimero.vinschen.de ([24.134.7.25]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MHGTI-1lV5rk14oC-00DHPw for ; Thu, 04 Mar 2021 16:54:40 +0100 Received: by calimero.vinschen.de (Postfix, from userid 500) id DD66DA805CE; Thu, 4 Mar 2021 16:54:39 +0100 (CET) Date: Thu, 4 Mar 2021 16:54:39 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: segfault on 32bit cygwin snapshot Message-ID: Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <20210301095546.dce31a474bd0cec2c3518f87@nifty.ne.jp> <20210301212542.8b1749f92af62c01b008f25a@nifty.ne.jp> <20210302200308.62db4fe01f78fb35a538784f@nifty.ne.jp> <20210303185621.b048287526901af6a4c8200a@nifty.ne.jp> <20210304180534.7c3825e6ee989a2bf62f0652@nifty.ne.jp> <20210304205000.4ac34afe1a8b767ea2986291@nifty.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Provags-ID: V03:K1:bc2cttBni7RpU2GX+Z/g2Ias/0cPqSfQ4uE5qzUTgpdeZhzfaSK WmU2IQMqHaCIzMa+0PJDvkTugG2aRlc20n75aIRuZ7U518WlFnu58Kqg+rH09mzdV2yQMV4 0Fu/CiF6jR+CIy0Pirkb3gul4czsu+PKAL8fO6Vo7eW5nfzfjf0wiBOsgE5szn3+XKnK5tV Ew9yxkcFHOdybSAETnKYw== X-UI-Out-Filterresults: notjunk:1;V03:K0:3glcM2Y8u2E=:3Uzi3W9SA9NbVWr9KDer3C Q9OVX6kNpdu2KyhOB74L2K8Dwoq9z6RGPtAsaZvjc11rkDmsjL57ibwWlfI94m2UTuw1lHLBT IO02rhbd1p+Vm6v0tY6+roKB6lih4gDT8MdwzgJu7iKzWWqt3w9k48tc3ZGOI0N/w6F8EFb4o 2QxCT7cfM/I1QNuKXfEmae7X5y6cZQrpnrtK4FivYF8DsSNFsX97VO5KvlN2OEp09QJFZDgsK ZMtMp29upTUdnob5XslNJl7l/RHcnJNluG+t+WXvP/MU2d3s2tF/aum3mlp+aO+keiDwiQ7Wj HS9ehg0GQquQq7sYEl8NH+OTL4a9PRpWw9z9YVLJNvbcPimyT/FzfMSVncW8lw7HcHOey27we FroytbmYzzeyMew2mjrIQcmgVrlmpLSZFaWd/Ncq6MVd8tFXY5NIiaYMg8QVMFcFApOAK1fB1 Ea1aETUzZg== X-Spam-Status: No, score=-101.4 required=5.0 tests=BAYES_00, GOOD_FROM_CORINNA_CYGWIN, KAM_DMARC_NONE, KAM_DMARC_STATUS, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NEUTRAL, TXREP autolearn=ham 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@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Mar 2021 15:54:43 -0000 On Mar 4 10:17, 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. Right. I was wondering the same when I read Marco's reply. I thought this is something in old python versions, but my testing never involved python. I just used a simple uname implementation calling uname via dlopen/dlsym. Either way, the problem persists. Newly built executables requesting uname via dlsym should certainly get the new implementation. Corinna