Dear All, In order to ease the investigation, I reproduced this segfault by running snes/examples/tutorials/ex1f.F with the option -snes_type fas. I have the feeling that this is due to the nullity of the context object of FormJacobian (PETSC_NULL_OBJECT in Fortran).
Best regards, Nicolas 2017-06-01 16:30 GMT+02:00 Karin&NiKo <[email protected]>: > Dear PETSc team, > > I have interfaced our fortran legacy code with PETSC SNES. I mainly > followed the examples you provide. What I conceptually used is : > > ------------------------------------------------------------ > -------------------------------------------------------------------------- > > call SNESCreate(PETSC_COMM_WORLD,snes,ierr) > > call SNESSetFromOptions(snes,ierr) > > call SNESSETFunction(snes, pf, nonlinFormFunction, PETSC_NULL_OBJECT, > ierr) > > call SNESSetJacobian(snes, mat, mat, nonlinFormJacobian, > PETSC_NULL_OBJECT, ierr) > > call SNESSetKSP(snes, myksp, ierr) > ------------------------------------------------------------ > -------------------------------------------------------------------------- > > The code runs fine with -snes_type newtonls or newtontr. But when using > -snes_type fas, it complains with the message : > > ------------------------------------------------------------ > -------------------------------------------------------------------------- > [0]PETSC ERROR: --------------------- Error Message > -------------------------------------------------------------- > [0]PETSC ERROR: Corrupt argument: http://www.mcs.anl.gov/petsc/ > documentation/faq.html#valgrind > [0]PETSC ERROR: Fortran callback not set on this object > [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html > for trouble shooting. > [0]PETSC ERROR: Petsc Release Version 3.7.2, Jun, 05, 2016 > [0]PETSC ERROR: > > > > on a arch-linux2-c-debug named dsp0780450 by niko Thu Jun 1 16:18:43 2017 > [0]PETSC ERROR: Configure options --prefix=/home/niko/dev/ > codeaster-prerequisites/petsc-3.7.2/Install --with-mpi=yes --with-x=yes > --download-ml=/home/niko/dev/codeaster-prerequisites/petsc-3.7.2/ml-6.2-p3.tar.gz > --with-mumps-lib="-L/home/niko/dev/codeaster-prerequisites/v13/ > prerequisites/Mumps-502_consortium_aster1/MPI/lib -lzmumps -ldmumps > -lmumps_common -lpord -L/home/niko/dev/codeaster-prerequisites/v13/ > prerequisites/Scotch_aster-604_aster6/MPI/lib -lesmumps -lptscotch > -lptscotcherr -lptscotcherrexit -lscotch -lscotcherr -lscotcherrexit > -L/home/niko/dev/codeaster-prerequisites/v13/prerequisites/Parmetis_aster-403_aster/lib > -lparmetis -L/home/niko/dev/codeaster-prerequisites/v13/ > prerequisites/Metis_aster-510_aster1/lib -lmetis -L/usr/lib > -lscalapack-openmpi -L/usr/lib -lblacs-openmpi -lblacsCinit-openmpi > -lblacsF77init-openmpi -L/usr/lib/x86_64-linux-gnu -lgomp " > --with-mumps-include=/home/niko/dev/codeaster-prerequisites/v13/ > prerequisites/Mumps-502_consortium_aster1/MPI/include > --with-scalapack-lib="-L/usr/lib -lscalapack-openmpi" > --with-blacs-lib="-L/usr/lib -lblacs-openmpi -lblacsCinit-openmpi > -lblacsF77init-openmpi" --with-blas-lib="-L/usr/lib -lopenblas -lcblas" > --with-lapack-lib="-L/usr/lib -llapack" > [0]PETSC ERROR: #1 PetscObjectGetFortranCallback() line 263 in > /home/niko/dev/codeaster-prerequisites/petsc-3.7.2/src/ > sys/objects/inherit.c > [0]PETSC ERROR: #2 oursnesjacobian() line 105 in /home/niko/dev/codeaster- > prerequisites/petsc-3.7.2/src/snes/interface/ftn-custom/zsnesf.c > [0]PETSC ERROR: #3 SNESComputeJacobian() line 2312 in > /home/niko/dev/codeaster-prerequisites/petsc-3.7.2/src/ > snes/interface/snes.c > [0]PETSC ERROR: #4 SNESSolve_NEWTONLS() line 228 in > /home/niko/dev/codeaster-prerequisites/petsc-3.7.2/src/snes/impls/ls/ls.c > [0]PETSC ERROR: #5 SNESSolve() line 4008 in /home/niko/dev/codeaster- > prerequisites/petsc-3.7.2/src/snes/interface/snes.c > [0]PETSC ERROR: #6 SNESFASDownSmooth_Private() line 512 in > /home/niko/dev/codeaster-prerequisites/petsc-3.7.2/src/ > snes/impls/fas/fas.c > [0]PETSC ERROR: #7 SNESFASCycle_Multiplicative() line 816 in > /home/niko/dev/codeaster-prerequisites/petsc-3.7.2/src/ > snes/impls/fas/fas.c > [0]PETSC ERROR: #8 SNESSolve_FAS() line 987 in /home/niko/dev/codeaster- > prerequisites/petsc-3.7.2/src/snes/impls/fas/fas.c > [0]PETSC ERROR: #9 SNESSolve() line 4008 in /home/niko/dev/codeaster- > prerequisites/petsc-3.7.2/src/snes/interface/snes.c > ------------------------------------------------------------ > -------------------------------------------------------------------------- > > When exploring a little bit with a debugger, it seems that the object > snes->vec_rhs which is used is fas.c is a null pointer. > > What is this object vec_rhs and how to set it? > > Thank you in advance, > Nicolas > >
