GDB output

(gdb) where
#0  0x00007fffeef36f4b in mca_btl_smcuda_sendi ()
   from /usr/local/openmpi-4.1.2/lib/openmpi/mca_btl_smcuda.so
#1  0x00007fffed0243e7 in mca_pml_ob1_send_inline.constprop ()
   from /usr/local/openmpi-4.1.2/lib/openmpi/mca_pml_ob1.so
#2  0x00007fffed024fa2 in mca_pml_ob1_isend ()
   from /usr/local/openmpi-4.1.2/lib/openmpi/mca_pml_ob1.so
#3  0x00007ffff6b4316d in PMPI_Isend ()
   from /usr/local/openmpi-4.1.2/lib/libmpi.so.40
#4  0x00007ffff758d12f in Send (buffer=0x7fff9ed23b24, count=6,
    type=0x555555758f80 <ompi_mpi_float>, dest=1, tag=1024,
    comm=0x555555758d80 <ompi_mpi_comm_world>, requests=0x7fffffffb9c0,
    req=@0x7fffffffc9a8: 309)
    at /home/stadik/ALSIM/LbmSolver/LbmLib/src/communicator.cu:10
#5  0x00007ffff75948ec in Communicator::ExchangeHalosFields (
    this=0x5555558b18b8, g=0)
    at /home/stadik/ALSIM/LbmSolver/LbmLib/src/communicator.cu:668
#6  0x00007ffff7593dce in Communicator::ExchangeHalosFields (
    this=0x5555558b18b8)
    at /home/stadik/ALSIM/LbmSolver/LbmLib/src/communicator.cu:606
#7  0x000055555562889c in main (argc=2, argv=0x7fffffffd3e8)
    at /home/stadik/ALSIM/LbmSolver/LbmMain/src/lbm.cu:388
(gdb)