[Halld-offline] non-reproducibility study

[Simon Taylor]

I have checked in some changes to the tracking code that appear to 
address the valgrind errors mentioned below.

Simon

On 03/12/2014 03:59 PM, Matthew Shepherd wrote:
> Having just spent many frustrating hours hunting down my own separate non-deterministic bug I was motivated to run hd_dump -DTrackWireBased through valgrind.
>
> The error below seems suspicious and could result in non-determinstic behaviour, although valgrind is known to generate "errors" where there are none.  I didn't have time to look at the code since I have to run to another meeting, but thought I would pass it on.
>
> Matt
>
>
> ==7443== Conditional jump or move depends on uninitialised value(s)
> ==7443==    at 0x88F769: DTrackFitterKalmanSIMD::KalmanForwardCDC(double, DMatrix5x1&, DMatrix5x5&, double&, unsigned int&) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x8926C4: DTrackFitterKalmanSIMD::ForwardCDCFit(DMatrix5x1 const&, DMatrix5x5 const&) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x89762A: DTrackFitterKalmanSIMD::KalmanLoop() (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x898315: DTrackFitterKalmanSIMD::FitTrack() (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x84B8CB: DTrackFitter::FindHitsAndFitTrack(DKinematicData const&, DReferenceTrajectory const*, jana::JEventLoop*, double, int, double, DetectorSystem_t) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x8C25D7: DTrackWireBased_factory::DoFit(unsigned int, DTrackCandidate const*, DReferenceTrajectory*, jana::JEventLoop*, double) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x8C4803: DTrackWireBased_factory::evnt(jana::JEventLoop*, int) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x6C8F38: jana::JFactory<DTrackWireBased>::Get(std::vector<DTrackWireBased const*, std::allocator<DTrackWireBased const*> >&) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x6C97EC: jana::JFactory<DTrackWireBased>* jana::JEventLoop::GetFromFactory<DTrackWireBased>(std::vector<DTrackWireBased const*, std::allocator<DTrackWireBased const*> >&, char const*, jana::JEventLoop::data_source_t&, bool) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x6C9A84: jana::JFactory<DTrackWireBased>* jana::JEventLoop::Get<DTrackWireBased>(std::vector<DTrackWireBased const*, std::allocator<DTrackWireBased const*> >&, char const*, bool) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x6CA153: jana::JFactory<DTrackWireBased>::GetNrows() (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
> ==7443==    by 0x571A39: MyProcessor::evnt(jana::JEventLoop*, int) (in /home/fs1/mashephe/gluex/my_src/bin/Linux_CentOS6-x86_64-gcc4.4.6/hd_dump)
>
>