RE: [ROOT] Core dump due to long LD_LIBRARY_PATH

From: Rene Brun (brun@pcbrun.cern.ch)
Date: Mon Dec 06 2004 - 21:41:53 MET


Pere,

a better solution than any existing solution can always be found.
Will you trust a software system with a LD_LIBRARY_PATH that
takes more than 4000 characters?

Rene 

On Mon, 6 
Dec 2004, Pere Mato Vila wrote:

> Thanks Rene.
> By the way. Why it needs to be a limit in the length? Can not a better
> solution be found?
> 
> 		Pere 
> 
> > -----Original Message-----
> > From: brun@pcbrun.cern.ch [mailto:brun@pcbrun.cern.ch] On 
> > Behalf Of Rene Brun
> > Sent: 06 December 2004 14:41
> > To: Pere Mato Vila
> > Cc: roottalk; Fons Rademakers
> > Subject: Re: [ROOT] Core dump due to long LD_LIBRARY_PATH
> > 
> > Hi Pere,
> > 
> > Your "serious" problem will become a "no" problem if you 
> > execute root.exe instead of root.
> > 
> > The executable in $ROOTSYS/bin/root is a small fron-end 
> > showing the splash-screen and launching the main executable root.exe.
> > To launch root.exe the front-end has to set the 
> > LD_LIBRARY_PATH for root.exe.
> > Only 512 chars were allocated for an internal array to build 
> > the LD_LIBRARY_PATH. I have extended this array to 4096 in 
> > the CVS version.
> > The problem is only visible with groups having extremely long 
> > LD_LIBRARY_PATH.
> > 
> > Rene Brun
> > 
> > Pere Mato Vila wrote:
> > > 
> > > Dear rooters,
> > > 
> > >   We have in LHCb serious problems when using "root" within the new 
> > > SLC3 platform. ROOT 3.10.02 core dumps at the start with 
> > the following
> > > traceback:
> > > 
> > > #0  0x00a5bbac in mempcpy () from /lib/tls/libc.so.6
> > > #1  0x00a4f4b2 in _IO_default_xsputn_internal () from 
> > > /lib/tls/libc.so.6
> > > #2  0x00a28517 in vfprintf () from /lib/tls/libc.so.6
> > > #3  0x00a443cc in vsprintf () from /lib/tls/libc.so.6
> > > #4  0x00a2f02d in sprintf () from /lib/tls/libc.so.6
> > > #5  0x0804931f in SetLibraryPath ()
> > > #6  0x080497c9 in main ()
> > > 
> > >   The reason I think is due to the change in length of the 
> > > LD_LIBRARY_PATH due to the change in the platform tag we 
> > use in this 
> > > new platform. We have changed rh73_gcc3232 to slc3_ia32_gcc323 
> > > increasing the total length from 1110 bytes to 1166.
> > > 
> > > Can this limitation be removed? Or build a protection that 
> > it does not 
> > > core dump?
> > > Thanks in advance,
> > > 
> > >                                 Pere
> > 
> 



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