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Re: uBlas memory access errors

 

I'll take a look. The problem appears to be related to the uBlasMatrix constructor.

Garth

Anders Logg wrote:
We seem to be having a few problem memory access errors in the uBlas
linear algebra library. Here are some of the problems that valgrind
reports on the current Poisson demo:

Conditional jump or move depends on uninitialised value(s)
==14185==    at 0x4022460: memmove (mc_replace_strmem.c:501)
==14185==    by 0x804FAAF:
dolfin::uBlasMatrix<boost::numeric::ublas::compressed_matrix<double,
boost::numeric::ublas::basic_row_major<unsigned, int>, 0,
boost::numeric::ublas::unbounded_array<unsigned,
std::allocator<unsigned> >,
boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >::uBlasMatrix() (stl_algobase.h:300)
==14185==    by 0x804CACF: main (main.cpp:100)


==14185== Conditional jump or move depends on uninitialised value(s)
==14185==    at 0x4022460: memmove (mc_replace_strmem.c:501)
==14185==    by 0x8054E1C:
boost::numeric::ublas::generalized_vector_of_vector<double,
boost::numeric::ublas::basic_row_major<unsigned, int>,
boost::numeric::ublas::vector<boost::numeric::ublas::compressed_vector<double,
0, boost::numeric::ublas::unbounded_array<unsigned,
std::allocator<unsigned> >,
boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, boost::numeric::ublas::unbounded_array<boost::numeric::ublas::compressed_vector<double, 0, boost::numeric::ublas::unbounded_array<unsigned, std::allocator<unsigned> >, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::allocator<boost::numeric::ublas::compressed_vector<double, 0, boost::numeric::ublas::unbounded_array<unsigned, std::allocator<unsigned> >, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > > > > >::resize(unsigned, unsigned, bool) (stl_algobase.h:300)
==14185==    by 0x805548F:
dolfin::uBlasMatrix<boost::numeric::ublas::compressed_matrix<double,
boost::numeric::ublas::basic_row_major<unsigned, int>, 0,
boost::numeric::ublas::unbounded_array<unsigned,
std::allocator<unsigned> >,
boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >::init(unsigned, unsigned) (uBlasMatrix.h:351)
==14185==    by 0x4069837:
dolfin::Assembler::initGlobalTensor(dolfin::GenericTensor&,
dolfin::UFC const&) const (Assembler.cpp:233)
==14185==    by 0x406A992:
dolfin::Assembler::assemble(dolfin::GenericTensor&, ufc::form const&,
dolfin::Mesh&, dolfin::Array<dolfin::Function*>) (Assembler.cpp:62)
==14185==    by 0x406AB03:
dolfin::Assembler::assemble(dolfin::GenericTensor&, dolfin::Form
const&, dolfin::Mesh&) (Assembler.cpp:37)
==14185==    by 0x40696D1: dolfin::assemble(dolfin::GenericTensor&,
dolfin::Form const&, dolfin::Mesh&) (assemble.cpp:16)
==14185==    by 0x804CAFF: main (main.cpp:102)

Any ideas what goes wrong?

/Anders
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