=== If no file names and line numbers are shown below, one can run
            addr2line -Cpfie my_exefile my_line_address
    to convert `my_line_address` (e.g., 0x4a6b) into file name and line number.
    Or one can use amrex/Tools/Backtrace/parse_bt.py.

=== Please note that the line number reported by addr2line may not be accurate.
    One can use
            readelf -wl my_exefile | grep my_line_address'
    to find out the offset for that line.

 0: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x1b4335) [0x55e73757c335]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_BLBackTrace.cpp:176:39

 1: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x1b5f66) [0x55e73757df66]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_BLBackTrace.cpp:80:8

 2: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x31167) [0x55e7373f9167]
    std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_is_local() const inlined at /usr/include/c++/9/bits/basic_string.h:231:6 in Castro::check_for_nan(amrex::MultiFab&, int)
/usr/include/c++/9/bits/basic_string.h:222:26
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_dispose()
/usr/include/c++/9/bits/basic_string.h:231:6
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()
/usr/include/c++/9/bits/basic_string.h:658:9
Castro::check_for_nan(amrex::MultiFab&, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:4033:154

 3: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x45de5) [0x55e73740dde5]
    Castro::do_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:103:27

 4: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x4684c) [0x55e73740e84c]
    advance_status::operator=(advance_status&&) inlined at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:560:90 in Castro::subcycle_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.H:144:8
Castro::subcycle_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:560:90

 5: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x44d6a) [0x55e73740cd6a]
    double const& std::min<double>(double const&, double const&) inlined at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:55:92 in Castro::advance(double, double, int, int)
/usr/include/c++/9/bits/stl_algobase.h:205:14
Castro::advance(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:55:92

 6: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x223f3d) [0x55e7375ebf3d]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/amrex//Src/Amr/AMReX_Amr.cpp:2054:81

 7: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x215cfa) [0x55e7375ddcfa]
    std::vector<double, std::allocator<double> >::operator[](unsigned long) inlined at /raid/testing/castro-gfortran/amrex//Src/Base/AMReX_Vector.H:34:54 in amrex::Amr::coarseTimeStep(double)
/usr/include/c++/9/bits/stl_vector.h:1042:2
amrex::Vector<double, std::allocator<double> >::operator[](unsigned long)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_Vector.H:34:54
amrex::Amr::coarseTimeStep(double)
/raid/testing/castro-gfortran/amrex//Src/Amr/AMReX_Amr.cpp:2381:26

 8: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x2292c) [0x55e7373ea92c]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:143:33

 9: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7fb82bf401a3]
    __libc_start_main
??:0

10: ./Castro3d.gnu.TEST.TPROF.MPI.ex(+0x2af7e) [0x55e7373f2f7e]
    _start
??:0


===== TinyProfilers ======
main()
Amr::coarseTimeStep()
Amr::timeStep()
Castro::advance()
Castro::subcycle_advance_ctu()
Castro::do_advance_ctu()
Castro::check_for_nan()