[Pw_forum] Segmentation Faults - Running QE-4.3.2 under Kubutu 11.10 within Latest Oracle Virtualbox

[Axel Kohlmeyer]

On Mon, Nov 21, 2011 at 2:48 AM, W2AGZ <w2agz at w2agz.com> wrote:
> To All,
>
>
>
> I know segmentation faults are a constant nuisance given the multitude of
> platforms on which we ask QE to perform, but I’m having consistent failures
> trying to run the examples on a new Windows box I’ve built based on the
> latest Win7 and Oracle VB (Yeah, Yeah…I know…just switch to Linux,
> period…but I need to run antediluvian tasks from time to time).
>
>

hi paul,

> The Forum blames most segmentation issues on virtual memory limitations…but
> I have 100 gigs.

those 100gigs may be useless if you have a 32-bit compiler
or are compiling for a 32bit target. windows can be a bit funny
there at times. if you _do_ compile for 64-bit, please keep an
eye out for differences in sizes of integer variables. as far as
i remember, there are differences between linux and windows
and i would bet that very few Q-E developers, if any test on
windows.

the first step to solving a segfault issue is to determine
exactly what is segfaulting where. for that you usually
need to compile with debug information turned on and
run under the control of a debugger to get a stack trace
and thus determine the location of the segfault and then
figure out whether you are running out of stack space
or into some other issue.

cheers,
    axel.

>
>
> Thanks, -Paul
>
>
>
> Paul Michael Grant, PhD
>
> Physicist and Science Writer
>
> Senior Life Fellow, American Physical Society
>
> Fellow, Institute of Physics, United Kingdom
>
> Staff Associate, Jet Propulsion Laboratory, NASA (2011)
>
> Visiting Scholar, Applied Physics, Stanford (2005-2008)
>
> EPRI Science Fellow (Retired)
>
> IBM Research Staff Member Emeritus
>
> Principal, W2AGZ Technologies
>
> w2agz at w2agz.com
>
> http://www.w2agz.com
>
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-- 
Dr. Axel Kohlmeyer
akohlmey at gmail.com  http://goo.gl/1wk0

College of Science and Technology
Temple University, Philadelphia PA, USA.