X-Spam-Check-By: sourceware.org Date: Wed, 26 Apr 2006 17:48:23 -0400 From: Christopher Faylor To: cygwin AT cygwin DOT com Subject: Re: Reproducible hang with unusual border conditions Message-ID: <20060426214823.GA22097@trixie.casa.cgf.cx> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <444FE899 DOT 4010102 AT scytek DOT de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <444FE899.4010102@scytek.de> User-Agent: Mutt/1.5.11 Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Unsubscribe: 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 On Wed, Apr 26, 2006 at 05:39:37PM -0400, Volker Quetschke wrote: >On my search for the infamous cygwin hang while building OOo, >see , >and >that I couldn't reproduce myself (WJFFM) I finally managed to get a >reproducible hang on my systems that might be related. > >As said, the original OOo build works just fine here, but there is >an alternative possibility to build OOo with 4nt instead of tcsh, and >from that I managed to reproduce a small testcase. Unfortunately >it requires 4nt :( and some strict/strange border conditions: > >1. It only hangs from rxvt. (Invoked with shortlink from desktop to: >C:\cygwin\bin\rxvt.exe -cr green -sl 1000 -tn linux -e /usr/bin/bash >--login -i) >I guess the actual switches don't matter. Startting the following >example from the bash that is started from the cygwin icon (cygwin.bat) >didn't show the problem so far. > >2. Only hangs for "real" background processes started with setsid. From rxvt >like this: >$ setsid ./hang.sh >& hang.log > >You need to unpack the following testcase, > >it contains the following files: >-rwxr-xr-x 1 quetschke None 147456 Apr 3 20:19 dmake.exe >-rwxr-xr-x 1 quetschke None 3 Apr 26 10:34 hang.XXX$ >-rwxr-xr-x 1 quetschke None 192635 Apr 26 16:45 hang.log >-rwxr-xr-x 1 quetschke None 285 Apr 26 13:30 hang.mk >-rwxr-xr-x 1 quetschke None 133 Apr 26 13:22 hang.sh > >The dmake.exe is a native w32 version, from a m164 OO build with W32-4nt. > >For me, after entering the above command and letting it run for a few >minutes, >I get a 4nt process that is stuck at 99% and no new output reaches hang.log. > >It definitely looks like 4nt is hanging, *BUT* >$ ps > PID PPID PGID WINPID TTY UID STIME COMMAND > 3972 1 3972 3972 con 1006 16:35:12 /usr/bin/rxvt >I 3996 3972 3996 4008 0 1006 16:35:12 /usr/bin/bash > 3804 1 3804 736 ? 1006 16:49:29 /usr/bin/bash > 828 3804 3804 3760 ? 1006 16:52:26 >/cygdrive/d/w1/w32-4nt-hang/dmake > >if I kill the calling cygwin script, kill 3804 in this case, 4nt stops to >loop. > >As you can see in hang.mk, I tried to reproduce the hang with cmd.exe, but I >cannot get to hang that either. > >This is a very elusive problem :( So, if I'm understanding what you're saying correctly, you are seeing a hang in a non-cygwin process (4nt) which can't be duplicated in a program with similar functionality (cmd) so therefore, your conclusion is that there is a cygwin bug? Please verify what the identity of the actual hung program by running task manager. If it really is a non-cygwin program that is having problems then I'm not tremendously concerned. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/