(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.

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