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Date: Mon, 25 Jun 2012 10:05:50 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: crash on latest cygwin snapshot
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References: <4FE786DA DOT 2050208 AT gmail DOT com> <20120625043110 DOT GA28607 AT ednor DOT casa DOT cgf DOT cx> <4FE81478 DOT 8030508 AT gmail DOT com>
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On Jun 25 09:34, marco atzeri wrote:
> On 6/25/2012 6:31 AM, Christopher Faylor wrote:
> >On Sun, Jun 24, 2012 at 11:30:02PM +0200, marco atzeri wrote:
> >>Cgf, Corinna,
> >>
> >>while building latest atlas  I hit a bug that is crashing all the
> >>running cygwin process.
> >>It crashes on 20120619 snapshot and also latest cvs source.
> >>No issue on 20120611 snapshot.
> >>
> >>The binary to replicate and a extract of the strace's is at
> >>http://matzeri.altervista.org/works/atlas/
> >>
> >>on W7/64 just run this command
> >>---------------------------------------------------------------------
> >>  ./xprobe_comp -v 2 -o atlconf.txt -O 9 -A 25 -Si nof77 0 -V 448  -Fa
> >>ic '-fno-common' -Fa sm '-fno-common' -Fa dm '-fno-common' -Fa sk
> >>'-fno-common' -Fa dk '-fno-common' -Fa xc '-fno-common' -Fa gc
> >>'-fno-common' -Fa if '-fno-common' -b 32 -d b .
> >>----------------------------------------------------------------------
> >>
> >>no stackdump is generated.
> >
> >I think I need a better test case.
> 
> I was afraid of that.
> xprobe_comp is a sytem/processor probe and it is really
> resource consuming during its normal run.
> 
> I tried to strace but it produces an enormous amount of data
> 
> $ ls -sh1  xprobe_comp.strace*
> 330M xprobe_comp.strace_fail
> 761M xprobe_comp.strace_good
> 
> and there is no guarantee that the root cause is traced.

Does the failing strace contain a line like this?

  --- Process 3708, exception C0000094 at 00401198

If so, it might give a clue.  There's a chance that an exception
generates another exception, so you might have more than one such
line.  The first one rules.  Did you try from CVS again with cgf's
latest patch?


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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