From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <cygwin-return-199880-listarch-cygwin=sourceware.org@cygwin.com>
Received: (qmail 23048 invoked by alias); 1 Nov 2015 19:09:12 -0000
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe@cygwin.com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin@cygwin.com>
List-Help: <mailto:cygwin-help@cygwin.com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com
Received: (qmail 23039 invoked by uid 89); 1 Nov 2015 19:09:11 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-1.4 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2
X-HELO: mail-wi0-f181.google.com
Received: from mail-wi0-f181.google.com (HELO mail-wi0-f181.google.com) (209.85.212.181) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Sun, 01 Nov 2015 19:09:10 +0000
Received: by wikq8 with SMTP id q8so39116552wik.1        for <cygwin@cygwin.com>; Sun, 01 Nov 2015 11:09:07 -0800 (PST)
X-Received: by 10.194.123.132 with SMTP id ma4mr18582397wjb.140.1446404947052; Sun, 01 Nov 2015 11:09:07 -0800 (PST)
MIME-Version: 1.0
Received: by 10.28.227.130 with HTTP; Sun, 1 Nov 2015 11:08:27 -0800 (PST)
Reply-To: fracting@gmail.com
In-Reply-To: <CALd+sZS-EbkUMgmRCyJUK0LCMo6zydzB1rbM9iZFrAcnbfHCRQ@mail.gmail.com>
References: <CALd+sZS-EbkUMgmRCyJUK0LCMo6zydzB1rbM9iZFrAcnbfHCRQ@mail.gmail.com>
From: Qian Hong <fracting@gmail.com>
Date: Sun, 01 Nov 2015 19:09:00 -0000
Message-ID: <CALd+sZTRVMuLjwZMjxN6f6JvTtax5rJAUuk_SMXvcQzMzxhirA@mail.gmail.com>
Subject: Re: Randomly hang when compiling Cygwin on Cygwin on Wine
To: cygwin <cygwin@cygwin.com>
Content-Type: text/plain; charset=UTF-8
X-IsSubscribed: yes
X-SW-Source: 2015-11/txt/msg00003.txt.bz2

Update:

I have another case of hang:

?(1)-+-bash(1419290)
     |-bash(1419318)---make(1423770)---sh(1423783)---sh(1423838)
     |-mintty(1249269)---bash(1249277)
     |-mintty(47)---bash(55)---bash(1132827)---make(1139169)---sh(1139182)---make(1139234)---sh(1206695)---sh(1206721)---make(1206764)---sh(1206770)---make(1206783)---perl(1249042)
     |-mintty(596773)---bash(596790)---pstree(1423865)
     `-mintty(1417449)---bash(1417457)


$ ps aux | grep 1249042
  1249042 1206783 1132827    1249050  pty0      197608   Oct 31 /usr/bin/perl
  1249077 1249042 1132827    1249092  pty0      197608   Oct 31
/usr/bin/nm <defunct>



Here the process perl(1249042) is waiting for a pipe, while its child
process nm(1249077) is in the status "defunct". nm(1249077) appears in
output of `ps aux`, but doesn't appear in output of `pstree -p -l`.

Is there any case, where a child process can exit unexpected, but the
parent process still incorrectly wait for the child process forever?

Thanks!

--
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