Re: [PLUG] strace weirdness

["Greg Lopp" <lopp@pobox.com>]

Sounds like it was a lockup, not a failure.  When he tried to debug the problem with strace, the problem did not manifest.  I do so love the Heisenbugs[1].

Is it acceptable to run it via "strace -o /dev/null <program> &" or some such?



1] http://en.wikipedia.org/wiki/Heisenbug#Heisenbugs

On 7/3/07, Mag Gam <magawake@gmail.com> wrote:

Is there a 'core' dump? or segment fault? What libraries is the application using (ldd)?

 

 

On 7/3/07, Jon Nelson <lists@linuxnotes.net > wrote:

On Tue, 2007-07-03 at 08:53 -0500, Greg Lopp wrote:
> Is this your program (that you are still debugging) or a more
> established package?
>
> Sounds like a race condition.  The processing time consumed by strace
> overhead may be the element which prevents the hang.  Can you tell us
> more about the program or "certain keys"?
>
>
> On 7/3/07, Jon Nelson <lists@linuxnotes.net> wrote:
>         Hi all,
>
>         I have a program that starts up, but after certain keys are
>         pressed it
>         hangs.  I used strace to run the program and it runs fine.  I
>         am
>         baffled.  Is there any obvious reason this happening?
>
>         Jon

I knew I would get that question.  I can't talk about the specifics of
the program, but let's say that it is a UI with many options to choose
from on the main screen.  You can arrow to the different options, but as
soon as you try to execute one of the options (Enter) it will freeze.
It also freezes when you try to exit normally (Esc).

Thanks for the help.

Jon

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___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug