=== 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() [0x6b3cc6]
    amrex::BLBackTrace::print_backtrace_info(_IO_FILE*)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_BLBackTrace.cpp:179:39

 1: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x6b5e3d]
    amrex::BLBackTrace::handler(int)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_BLBackTrace.cpp:85:15

 2: /lib64/libc.so.6(+0x3da70) [0x7f7430522a70]
    __restore_rt
??:0

 3: /lib64/libc.so.6(gsignal+0x145) [0x7f74305229e5]
    raise
??:0

 4: /lib64/libc.so.6(abort+0x116) [0x7f743050b8a4]
    abort
??:0

 5: /lib64/libc.so.6(+0x80007) [0x7f7430565007]
    __libc_message
??:0

 6: /lib64/libc.so.6(+0x87cdc) [0x7f743056ccdc]
    ??
??:0

 7: /lib64/libc.so.6(+0x8956c) [0x7f743056e56c]
    _int_free
??:0

 8: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x4403a0]
    amrex::BaseFab<double>::clear()
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_BaseFab.H:2121:40

 9: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x4ada72]
    Castro::estdt_rad()
/raid/testing/castro-gfortran/Castro//Source/driver/timestep.cpp:515:64

10: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x46be10]
    amrex::ParallelDescriptor::Communicator() inlined at /raid/testing/castro-gfortran/amrex//Src/Base/AMReX_ParallelDescriptor.H:1204:5 in Castro::estTimeStep()
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_ParallelDescriptor.H:212:55
void amrex::ParallelDescriptor::detail::DoAllReduce<double>(double*, int, int)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_ParallelDescriptor.H:1204:5
std::enable_if<std::is_floating_point<double>::value, void>::type amrex::ParallelDescriptor::ReduceRealMin<double>(double&)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_ParallelDescriptor.H:1335:31
Castro::estTimeStep()
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.cpp:1570:42

11: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x483972]
    Castro::do_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:405:28

12: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x4842dd]
    advance_status::operator=(advance_status&&) inlined at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:673:90 in Castro::subcycle_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro.H:131:8
Castro::subcycle_advance_ctu(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance_ctu.cpp:673:90

13: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x48253a]
    double const& std::min<double>(double const&, double const&) inlined at /raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:57:92 in Castro::advance(double, double, int, int)
/usr/include/c++/10/bits/stl_algobase.h:236:9
Castro::advance(double, double, int, int)
/raid/testing/castro-gfortran/Castro//Source/driver/Castro_advance.cpp:57:92

14: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x73e3b9]
    std::vector<double, std::allocator<double> >::operator[](unsigned long) inlined at /raid/testing/castro-gfortran/amrex//Src/Base/AMReX_Vector.H:37:59 in amrex::Amr::timeStep(int, double, int, int, double)
/usr/include/c++/10/bits/stl_vector.h:1046:39
amrex::Vector<double, std::allocator<double> >::operator[](unsigned long)
/raid/testing/castro-gfortran/amrex//Src/Base/AMReX_Vector.H:37:59
amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/amrex//Src/Amr/AMReX_Amr.cpp:2018:68

15: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x73e512]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/amrex//Src/Amr/AMReX_Amr.cpp:2061:13

16: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x73e512]
    amrex::Amr::timeStep(int, double, int, int, double)
/raid/testing/castro-gfortran/amrex//Src/Amr/AMReX_Amr.cpp:2061:13

17: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x735360]
    amrex::Amr::coarseTimeStep(double)
/raid/testing/castro-gfortran/amrex//Src/Amr/AMReX_Amr.cpp:2125:13

18: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x42c9ed]
    main
/raid/testing/castro-gfortran/Castro//Source/driver/main.cpp:136:33

19: /lib64/libc.so.6(__libc_start_main+0xf2) [0x7f743050d1e2]
    __libc_start_main
??:0

20: ./Castro3d.gnu.TEST.TPROF.MPI.ex() [0x4351ae]
    _start
??:0


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