On Wed, 9 Apr 2003, Jiri Masik wrote:
> Dmitri Litvintsev <litvinse@fnal.gov> writes:
>
> > Hi ROOTers,
> >
> > well, this is typical picture:
> >
> > root [27] TH1 h100 = (*h5)-(*h6);
> > root [28] h100.Draw();
> >
> > *** Break *** segmentation violation
> > Root >
> >
> > *** Break *** segmentation violation
> > Root >
> >
> > *** Break *** segmentation violation
> > Root >
> >
> > I forgot to type 'F' (TH1 istead of TH1F)
> > How can I recover from '*** Break *** segmentation violation' ?
> >
> > all I can manage is to ^Z, kill root, start all over again. Is it the only
> > way? I understand that I need to type right, but the punishment seems to
> > be to severe especially in the case when in order to get to that point you
> > need to run macros for half and hour.
i would never let a 'macro' run for half a hour, but rather compile the
stuff (program or aclic). but since i started root quite long ago, when
this behaviour was 'normal', i just am used to do ctr-Z.
to make life easier i have a short script:
# -----
ps > ./killroot.1
awk '/root/' ./killroot.1 > ./killroot.2
awk '{print "kill -9 ", $1}' ./killroot.2 > ./killroot.3
chmod 700 ./killroot.3
./killroot.3
rm ./killroot.1
rm ./killroot.2
rm ./killroot.3
# -----
which i am used to, but of cours you can also do:
# killall root
good night,
martin
> >
>
> Hi Dmitri,
>
> from the general point of view Root and cint don't protect against
> memory management errors.
>
> Some internal Root data are overwritten here. The interpreter is only
> checking whether a statement is valid or not. In this particular case
> the statement is valid so there is no reason to stop. The memory is
> overwritten and the problem lies in the TH1 classes - (maybe
> instantiation of TH1 objects could be forbidden?)
>
> On the other hand the command-line validity checks in the interpreter
> could be also improved. Consider a similar situation: assignment
> operations between TH1F and TH1D are not implemented
>
> TH1D *h1 = new TH1D("h1","",10,0.,1.);
> TH1F h = (*h1); //
>
> but they can be freely performed in the interpreter.
> Please correct me if I'm wrong.
> cheers
>
> Jiri
>
>
>
>
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