Run under valgrind first, see if it gives any more details about the memory issue http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
Can you send the code that produces this problem? > On Jul 13, 2015, at 10:56 AM, Florian Lindner <mailingli...@xgm.de> wrote: > > Hello, > > our petsc application suffers from a memory error (double free or corruption). > > Situation is a like that: > > A KSP is private member of a C++ class. In its constructor I call KSPCreate. > Inbetween it may haben that I call KSPREset. In the class' destructor I call > KSPDestroy. That's where the memory error appears: > > gdb backtrace: > > > #4 0x00007ffff490b8db in _int_free () from /usr/lib/libc.so.6 > #5 0x00007ffff6188c9c in PetscFreeAlign (ptr=0xfcd990, line=258, > func=0x7ffff753c4c8 <__func__.20304> "KSPReset_GMRES", file=0x7ffff753b8b0 > "/home/florian/software/petsc/src/ksp/ksp/impls/gmres/gmres.c") > at /home/florian/software/petsc/src/sys/memory/mal.c:72 > #6 0x00007ffff6ff6cdc in KSPReset_GMRES (ksp=0xf48470) at > /home/florian/software/petsc/src/ksp/ksp/impls/gmres/gmres.c:258 > #7 0x00007ffff70ad804 in KSPReset (ksp=0xf48470) at > /home/florian/software/petsc/src/ksp/ksp/interface/itfunc.c:885 > #8 0x00007ffff70ae2e8 in KSPDestroy (ksp=0xeb89d8) at > /home/florian/software/petsc/src/ksp/ksp/interface/itfunc.c:933 > > #9 0x0000000000599b24 in > precice::mapping::PetRadialBasisFctMapping<precice::mapping::Gaussian>::~PetRadialBasisFctMapping > (this=0xeb8960) at src/mapping/PetRadialBasisFctMapping.hpp:148 > #10 0x0000000000599bc9 in > precice::mapping::PetRadialBasisFctMapping<precice::mapping::Gaussian>::~PetRadialBasisFctMapping > (this=0xeb8960) at src/mapping/PetRadialBasisFctMapping.hpp:146 > > Complete backtrace at http://pastebin.com/ASjibeNF > > > Could it be a problem it objects set by KSPSetOperators are destroyed > afterwards? I don't think so, since KSPReset is called before. > > I've wrapped a class (just a bunch of helper function, no encapsulating > wrapper) round Mat and Vec objects. Nothing fancy, the ctor calls MatCreate, > the dtor MatDestroy, you can have a look at > https://github.com/precice/precice/blob/develop/src/mapping/petnum.cpp / .hpp. > > These objects are also members of the same class like KSP, so their dtor is > called after KSPDestroy. > > What could cause the memory corruption here? > > Thanks a lot, > Florian
