Re: Setup hangs in postinstall

[Brian Ford <ford at vss dot fsi dot com>]

On Wed, 10 Dec 2003, Michael Robbert wrote:
> Brian Ford wrote:
> > On Wed, 10 Dec 2003, Michael Robbert wrote:
> >>Everybody,
> >>Some new information I got today. I found another user on our campus
> >>that is having the problem on two different machines, but not a third.
> >>All of them running Windows XP. So far every machine I have seen it on
> >>is running XP and is a recent new install of Cygwin. Does anybody think
> >>that they could get closer to a solution if I were to provide you with a
> >>machine to play with remotely where the problem happens every time?
> >>
> > Why not try to debug it your self?
> >
> Gladly, I just need to know what to do. I'm not a developer, just a
> lowly SysAdmin so I may need some hand holding.
>
> > Have you tried to strace it?
> >
> Yes, I think that this was included in my initial Email. strace produces
>   no output.
>
Sorry, I remember now.

> I have tried attaching to a running/hung one as well as running:
>
By that you mean "strace -p pid_of_hung_process"?  IIRC, "strace -p pid"
is broken in the current release.  You need a newer one to do that.

> strace sh -c TEST=`uname -s`
> Both produced nothing, I suspect that the hang is actually happening
> outside of the sh that I create in the latter.
>
What do you mean by outside of?  That command should produce some output
regardless, even if it is just Cygwin startup stuff *way* before it gets
to the backtick evaluation.

> > Can you get a stack trace of the hang in gdb?  Note: You may need a debug
> > version of the cygwin1.dll or shell for this to be valid.  I will provide
> > the former if you are willing to test it.
> >
> Please provide along with instructions of what to do.
>
Ok, but first have you tried "gdb /bin/sh.exe sh_pid" to get a stack
trace?  If you can't do that, it won't much matter.

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
Phone: 314-551-8460
Fax:   314-551-8444

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