From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from conssluserg-06.nifty.com (conssluserg-06.nifty.com [210.131.2.91]) by sourceware.org (Postfix) with ESMTPS id 559A63858D28 for ; Sat, 9 Apr 2022 16:58:31 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 559A63858D28 Authentication-Results: sourceware.org; dmarc=fail (p=none dis=none) header.from=nifty.ne.jp Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=nifty.ne.jp Received: from Express5800-S70 (ak044095.dynamic.ppp.asahi-net.or.jp [119.150.44.95]) (authenticated) by conssluserg-06.nifty.com with ESMTP id 239GvoSX014856; Sun, 10 Apr 2022 01:57:50 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-06.nifty.com 239GvoSX014856 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.ne.jp; s=dec2015msa; t=1649523470; bh=NRhyhtxKhhku+O7/fp1JiUiuMCUa/BKpsvkNu/vLDXU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=a59m/VJBP6C9wLZDOtsVIC7x0KYzLQ969ykW/p8SAiSmppvYO49A/dBZolTN6WQfS P/jatTFxTtIb22uQEoDhrMN4LphWaln4wToDrwMbar5NeBboTvu3EGCu7uDw8FQFXS t9Wgt5QtMOHmY6XQDAe8ny46IwBVl47Flp/kmq3Mbmj62vEfebV1ix461WFLVTkmRA qgEJR8KsFkyXHAtQ+U2Xdq2xxU26xlzyOWVYWawV1qfNvqfR/c3/tnOFmVUqTnz41t 94sJGU406FC9ZfgYW2uIswc2E9IJwRUwapilJHBde6RlxRT+z/5TgfE3keGX3hgvfx S9m8oGwUomT1g== X-Nifty-SrcIP: [119.150.44.95] Date: Sun, 10 Apr 2022 01:57:53 +0900 From: Takashi Yano To: cygwin@cygwin.com Cc: Alexey Izbyshev Subject: Re: Deadlock of the process tree when running make Message-Id: <20220410015753.753e2a238513eaf2a3da81e9@nifty.ne.jp> In-Reply-To: <907ce1b4416a826cb07990dd601bd687@ispras.ru> References: <9388316255ada0e0fcb2d849cce5a894@ispras.ru> <20220409191743.6da2268a36e8c9b4ab22c722@nifty.ne.jp> <1ecd670b1cdff43e0b0d7e5ee4c9cfc5@ispras.ru> <20220409204619.dd0e53902d5e108ef462e510@nifty.ne.jp> <907ce1b4416a826cb07990dd601bd687@ispras.ru> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-6.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) 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: Sat, 09 Apr 2022 16:58:35 -0000 On Sat, 09 Apr 2022 19:07:08 +0300 Alexey Izbyshev wrote: > On 2022-04-09 14:46, Takashi Yano wrote: > > On Sat, 09 Apr 2022 14:02:38 +0300 > > Alexey Izbyshev wrote: > >> > >> Missed the line in the link above: > >> https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler_tty.cc;h=7bef6958c106c5e78cc90e014081022fd3a205bc;hb=cygwin-3_3_4-release#l1199 > > > > Thanks for finding that. It would be very helpfull if you could > > find another process which holds pcon_mutex and where it is stopping. > > ProcessHacker showed that the owner of the pcon mutex is bash.exe with > (Windows) PID 6276. However, Cygwin ps doesn't list such a process. Its > parent, however, has a Cygwin PID 37961 and is in the hanging tree: > > make(32651)-+-make(32656)-+-bash(37296)---find(38057) > | |-bash(37632)---find(38061) > | |-bash(37415)---find(38064) > | |-bash(37852)---find(38062) > | |-bash(37896)---find(38063) > | `-bash(37961)---javac(38032) > > `-make(32657)-+-bash(38025)---bash(38054)---bash(38055)---readlink(38056) > > `-bash(37722)---bash(37825)---bash(38058)-+-grep(38060) > > `-grep(38059) > > Since javac(38032) is a zombie, my guess is that missing bash.exe (win > 6276) is an intermediate process that Cygwin created when bash(37961) > forked to run javac. > > bash.exe (win 6276) has two threads. The first one is blocked at > ClosePseudoConsole() (which according to stack trace eventually calls > NtWaitForSingleObject()) [1] and the second one is at [2]. > > [1] > https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler_tty.cc;h=7bef6958c106c5e78cc90e014081022fd3a205bc;hb=cygwin-3_3_4-release#l3615 > > [2] > https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/sigproc.cc;h=02d875a7fc947d628ca933690ed43ef03d767d53;hb=cygwin-3_3_4-release#l1359 > > Hope this is helpful, Thank you very much for the information. Can you check if the thread pty_master_fwd_thread() in root mintty is still alive? -- Takashi Yano