From: Truls Martin Larsen (t.m.larsen@fys.uio.no)
Date: Thu Nov 14 2002 - 05:01:21 EST
Hi Kris,
I have seen the seg fault myself, but also before root 3.03.09 and gcc
3.04. I have also spent a lot of time trying to figure out why these
popups produce this behaviour, but without any luck. If I should come
across any reason, I'll let you know.
Regards,
Truls
Kris Hagel wrote:
> Hello,
> I completed (I think) the migration to signal/slot in the online
> monitor software. This was necessitated by the fact that some of the
> routines still using the old message sending methods were not
> compiling after rootcint because of new "features" (I guess) of the
> 3.04 compiler on the piis. Whatever the reason, the signal/slot is a
> cleaner way to do business. These modifications are now checked in to
> the repository
>
> There is one caveat. I (or the 3.04 compiler; or root 3.03.09) have
> manufactured a seg fault when a popup canvas is used by double
> clicking on a monitor pad. Everything in my tests appears to continue
> working after the seg fault, but I have the general idea that all seg
> faults are bad seg faults. I did not manage to locate the problem and
> rationalized that not many people in brahms besides me use that
> feature anyway, so I went ahead and committed in the code. But a
> question to experts (Christian I guess, but anyone else if they
> know). How do I find where a seg fault happens? I tried with gdb and
> it says it is in InnerLoop and as far as I can tell it continues there
> after handling the signal (UNIX signal) It makes me miss VMS again as
> I remember "back in the good old days" when a program crashed and the
> computer told you exactly where it crashed and why. Who can help me?
> I spent a few hours coverting to signal/slot and 2 1/2 days chasing
> this stupid seg fault and in the end have nothing to show for it.
>
> Regards
>
> Kris
>
>
> .
>
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