On Apr 7 11:57, Corinna Vinschen wrote: > On Apr 5 02:35, Lavrentiev, Anton (NIH/NLM/NCBI) [C] wrote: > > >> I can’t push this through your list spam filter. Another attempt... > > > > I was trying a few times, and finally deleted the strace attachment. Let's > > see if this will go through. > > Excuse me for being a bit straightforward, but the spam filter this list is > > using is *really* stupid! > > > > > Still, you're missing the cygcheck log, > > > > Cygcheck log was attached to an earlier message from today (thread: > > exe.stackdump is always empty). > > > > > and a simple testcase would be helpful > > > > Here you go: > > [...] > > Windows event log immediately recorded 10 new events, like so: > > > > Error 4/4/2014 10:02:34 PM cygserver 0 None > > Error 4/4/2014 10:02:33 PM cygserver 0 None > > Error 4/4/2014 10:02:32 PM cygserver 0 None > > Error 4/4/2014 10:02:31 PM cygserver 0 None > > Error 4/4/2014 10:02:30 PM cygserver 0 None > > Error 4/4/2014 10:02:29 PM cygserver 0 None > > Error 4/4/2014 10:02:28 PM cygserver 0 None > > Error 4/4/2014 10:02:27 PM cygserver 0 None > > Error 4/4/2014 10:02:26 PM cygserver 0 None > > Error 4/4/2014 10:02:25 PM cygserver 0 None > > > > (each having exactly the same message: cygserver: PID 1944: cygserver: > > error getting signal_arrived to server (6)) > > Thanks, I can reproduce the issue. I'll investigate.
Ok, I see what happens. At fork time, cygserver gets called to fixup the information on XSI shared memory regions. When this fixup call is made, the handle value sent to cygserver is invalid. It's, in fact, the value of this object in the parent process, while the object doesn't exist at this point in the forked child. The child value is set to NULL just a little bit later and created as soon as it's required, but this happens too late for the aforementioned fixup call. I created a fix and I'm just building cygwin 1.7.29 with it. Thanks, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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