X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:message-id:date:from:mime-version:to:subject :references:in-reply-to:content-type:content-transfer-encoding; q=dns; s=default; b=eOe+osjQ08bd3TT9odt5DA09EGugdFbtlDV5V9serdW U9yBynN89kcHFtRbslExCKFsQCAVz0p1SvCsB8z8pgt5v1+nHAYZ5DKVh5BSIgBZ Cfq1g69Sq2ShHhT4RkwQvYcUdJ8mOEPolkpMB+FrG+nYLTALC2BKLAi3LbMth+60 = DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:message-id:date:from:mime-version:to:subject :references:in-reply-to:content-type:content-transfer-encoding; s=default; bh=VRg5/ZZXzkHCK1GSRsvpnekV/eU=; b=OTOpEX6nh6K7nBgHB vW6R3wUXh1TF6NCPfzMSMa0GXUO+cViFy8yz58rt8+A0ZlWd1KE9MleGlNeXE5PO 6wqqfekbMLo89RTQoBs8r97UGQ6lBALqngE7JalDbaoMAt/LNAY/6ZRZSxxP0fxq 1A02JpvlMcXylAtAmwufoUVQnU= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: limerock01.mail.cornell.edu X-CornellRouted: This message has been Routed already. Message-ID: <53A852B6.4050702@cornell.edu> Date: Mon, 23 Jun 2014 12:15:50 -0400 From: Ken Brown User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: cygwin AT cygwin DOT com Subject: Re: getaddrinfo : Non-recoverable failure in name resolution References: <53A81259 DOT 4080300 AT gmail DOT com> <20140623122510 DOT GD1803 AT calimero DOT vinschen DOT de> <53A82688 DOT 9010005 AT gmail DOT com> In-Reply-To: <53A82688.9010005@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes On 6/23/2014 9:07 AM, Marco Atzeri wrote: > > On 23/06/2014 14:25, Corinna Vinschen wrote: >> Hi Marco, >> >> On Jun 23 13:41, Marco Atzeri wrote: > >>> >>> 64 $ ./getaddrinfo_test-2_64 >>> getaddrinfo: Non-recoverable failure in name resolution >>> >>> >>> Am I missing something ? >>> The second way is currently used on postgresql in several places, >>> but it seems to fail only for "127.0.0.1" >> >> I don't know why this only fails for "127.0.0.1". But this is clearly a >> problem in the 64 bit Cygwin DLL. >> >> What happens is that the field ai_addrlen is defined as socklen_t in >> POSIX, but as size_t in the W32 API. On 64 bit, socklen_t is 4 bytes >> while size_t is 8 bytes. Setting all the hintp members manually (in >> contrast to calloc'ing it or memset'ing it to 0) leaves the 4 upper >> bytes of the ai_addrlen untouched. This in turn leads to a high >> probability that ai_addrlen has an invalid value when entering Winsock's >> getsockopt. >> >> I'm really surprised this hasn't been hit before. I'm going to fix that >> in Cygwin by setting the upper 4 bytes of ai_addrlen to 0 explicitely. > > Probably we have seen already but not identified. I wonder if this could explain the mysterious emacs crashes that have been reported on 64-bit Cygwin. The emacs code does set the hintp members manually in some places. The crashes seem to occur randomly, and the backtraces often don't make sense. Ken -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple