In an ongoing project at NHPCC (National High Performance Computing Center) at Hefei of China, we are building a debugger for parallel/distributed programs that run on a cluster of homogeneous workstations Dawning cluster system. Such debuggersare commonly built by layering a sophisticated user interface on top of existing sequential debuggers, such as dbx or gdb. We employ Object-Oriented technology in our work by using Java as the programming language. This paper describes how we design andimplement the debugger DCDB, the problems encountered and their solutions.
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