Source : Free On-Line Dictionary of Computing

Universal Debugger
     
         (udb) {KSR}'s interactive {source level
        debugger} for serial and parallel programs written in {KSR},
        {Fortran}, {KSR C} and {KSR1} {assembly language}.
     
        Udb is a source level debugger for testing and debugging
        serial and parallel programs; it is compatible with {GDB} and
        {dbx}.  The user can direct udb either by typing commands or
        graphically through an {X}-based window interface; the latter
        provides simultaneous display of source code, I/O and
        instructions.  For parallel programs, operations can be
        carried out per-{thread}.
     
        {Home
        (http://www.tc.cornell.edu/Parallel.Tools/tools/udb.html)}.
     
        (1995-05-07)