From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca (simark.ca [158.69.221.121]) by sourceware.org (Postfix) with ESMTPS id C8B3C3857C43 for ; Sat, 22 Aug 2020 19:41:18 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org C8B3C3857C43 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=simark.ca Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=simark@simark.ca Received: from [10.0.0.11] (173-246-6-90.qc.cable.ebox.net [173.246.6.90]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by simark.ca (Postfix) with ESMTPSA id 5D6001E009; Sat, 22 Aug 2020 15:41:18 -0400 (EDT) Subject: Re: [PATCH 1/4] Add sniffer for Cygwin x86_64 core dumps To: Jon Turney Cc: gdb-patches@sourceware.org References: <20200812191816.23246-1-jon.turney@dronecode.org.uk> <20200812191816.23246-2-jon.turney@dronecode.org.uk> <9c6ae1b6-c8b2-6219-1e2a-ed4954350fb1@dronecode.org.uk> <78accded-bb48-8d01-4feb-9d90002d5935@dronecode.org.uk> From: Simon Marchi Message-ID: <83585eda-b7ec-5735-d03e-d07ed7bcb3fe@simark.ca> Date: Sat, 22 Aug 2020 15:41:18 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <78accded-bb48-8d01-4feb-9d90002d5935@dronecode.org.uk> Content-Type: text/plain; charset=utf-8 Content-Language: fr Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, NICE_REPLY_A, SPF_HELO_PASS, SPF_PASS, 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: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Aug 2020 19:41:20 -0000 On 2020-08-21 12:28 p.m., Jon Turney wrote: > On 21/08/2020 17:22, Simon Marchi wrote: >> On 2020-08-21 11:25 a.m., Jon Turney wrote: >>> The "dumper" currently shipping in x86_64 Cygwin is utterly broken. (See [1] et seq.). >>> >>> If you use "dumper" from the latest snapshot [2], you may have more success >>> >>> [1] https://cygwin.com/git/?p=newlib-cygwin.git;a=commitdiff;h=7dd1b08836e8a7bb37d330995096540afce152a0;hp=38f88601469f4a6ab7cf42e1f076775c99eb17f2 >>> [2] https://cygwin.com/snapshots/ >> >> Ok, thanks for the tip. I'll give it a try with a snapshot. >> >> Do I just extract cygwin-20200821.tar.xz into my current Cygwin installation to overwrite >> the corresponding files? If I want to revert to the stable versions, how can I do that? > > You should be able to just extract the dumper.exe from that archive, and > use it. That's what I would suggest. Hmm, just tried that, now running "dumper" does nothing: Baube@DESKTOP-42816MD ~ $ dumper Baube@DESKTOP-42816MD ~ $ echo $? 127 One thing that's weird is that in my installation, binaries are in C:\cygwin64\bin, whereas in the snapshot, they are in usr/bin. Did the filesystem layout change recently? So I am not sure how to proceed to try the snapshot. > If you were to extract it over an existing Cygwin installation, to > revert you could use the cygwin setup program to re-install all cygwin* > packages. I successfully repaired my broken dumper by re-installing the cygwin* packages. Simon