[ROOT] TMapFile crash (again)

From: Atila Alves Neves (Atila.Alves.Neves@cern.ch)
Date: Sun May 26 2002 - 20:28:39 MEST


   Sorry to bring this up again, but... here's a program of mine to test
the TMapFile class. All it does is create the file, as you can see. I
compiled it with the command

 g++ -o new2 new2.cxx -I$ROOTSYS/include `root-config --glibs` -lNew

,using ROOT 3.01/06 on a linux/ecgs machine. If I then fire up rootn.exe
and try opening the file with

 f2=TMapFile::Create("monitor.map")

it either seg faults so bad I have to kill the window (when the size above
is 1000000), or seg faults when I exit ROOT (when the size is 100000).
When I tried 10000 as the file size, nothing happened. Any idea of what's
going wrong? I don't think I even need a file that big (~ 1MB), but I'll
have to check. Even so...

#include <string.h>
#include "TMapFile.h"

int main(int argc,char* argv[]) {

 char source[100];

 if(argc>=2)
    strcpy(source,argv[1]);
 else
   strcpy(source,"monitor.map");

 TMapFile::Create(source,"RECREATE",10000); //tried different sizes

 return 0;

}

> >    Hi, this is the output of my ROOT session, and I don't get why it
> > should crash. If I exit ROOT, and _then_ try to open the file in read-only
> > mode, everything is ok. I tried this in ROOT 3.01, 3.02 and 3.03, and got
> > the same result. Any idea why?
> >    There's also this other mapfile I have, which causes a seg fault as
> > soon as you try to open it. All I did was create it as below. The problems
> > might be related... Cheers,
> > 
> > Atila
> > 
> > 
> > root [0] f1=TMapFile::Create("file.map","RECREATE",100000)
> > (class TMapFile*)0x2bc30008
> > root [1] f3=TMapFile::Create("file.map")                  
> > (class TMapFile*)0x8684530
> > root [2] .q
> > 
> >  *** Break *** segmentation violation
> > Aborted



This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:54 MET