studio 11/x86 : dbx crashes with internal error
A beta release of FLASH 3 fully configures and compiles under the studio 11 /x86
compiler suite. The code is parallel and uses mpi for the process intercommunication,
for which we use Sun's CT7 (Clustertools 7).
The code runs fine for one and two cpus, but fails with an error for more cpus. This is
a bug in the code and we therefore would like to debug it. As a parallel debugger we
us DDT which in turn uses dbx for studio 11. The session crashes because of
dbx internal error. Using a straight dbx on a single cpu run we get the following output:
oberon:FLASH3.0_beta/object> dbx flash3
For information about new features see `help changes'
To remove this message, put `dbxenv suppress_startup_message 7.5' in your
.dbxrc
Reading flash3
Reading ld.so.1
Reading libdrfftw_mpi.so.2.0.7
Reading libdfftw_mpi.so.2.0.7
Reading libdrfftw.so.2.0.7
Reading libdfftw.so.2.0.7
Reading libhdfwrapper.so
Reading libhdf5.so.0.0.0
Reading libz.so.1
Reading libmpi.so.0.0.0
Reading libmpi_f90.so.0.0.0
Reading libmpi_f77.so.0.0.0
Reading libopen-rte.so.0.0.0
Reading libopen-pal.so.0.0.0
Reading libsocket.so.1
Reading libnsl.so.1
Reading librt.so.1
Reading libm.so.2
Reading libdl.so.1
Reading libfui.so.2
Reading libfai.so.1
Reading libfsu.so.1
Reading libsunmath.so.1
Reading libmtsk.so.1
Reading libc.so.1
Reading libaio.so.1
Reading libmd5.so.1
Reading libm.so.1
Reading libpthread.so.1
(dbx) l
36call Driver_initFlash()
37
38call Driver_evolveFlash( )
39
40call Driver_finalizeFlash ( )
41
42
43end program Flash
(dbx) stop in Driver_initFlash
dbx: warning: Can't find module symbol for 'gravity_interface' :
/data/rw12/tt/tmp/FLASH3.0_beta/object/flash3:Driver_initFlash.F90 stab #32
gravity_interface_:only;gravity_init,gravity_potentiallistofblocks
dbx: warning: Can't find module symbol for 'particles_interface' :
/data/rw12/tt/tmp/FLASH3.0_beta/object/flash3:Driver_initFlash.F90 stab #33
particles_interface_:only;particles_init
dbx: internal error: signal SIGSEGV (no mapping at the fault address)
dbx's coredump will appear in /tmp
Abort
I have a copy of the core dump and can provide that.
