Pi: a case study in object-oriented programming

ABSTRACT

Pi is a debugger written in C + +. This paper explains how object-oriented programming in C + + has influenced Pi's evolution. The motivation for object-oriented programming was to experiment with a browser-like graphical user interface. The first unforeseen benefit was in the symbol table: lazy construction of an abstract syntax-based tree gave a clean interface to the remainder of Pi, with an efficient and robust implementation. Next, though not in the original design, Pi was easily modified to control multiple processes simultaneously. Finally, Pi was extended to control processes executing across multiple heterogeneous target processors.

REFERENCES

• 1: E. Adams, S.S. Muchinick, "Dbx~ool -- A Window-bascd Symbolic i)ebusser for Sun Workstations', Proceedings Summer USIBNIX Conference, Portland, Oregon, July, 1985.
• 2: Bert Beander, VAX DEBUG: An interactive, symbolic, multilingual debugger, Proceedings of the ACM SIGSOFT/SIGPLAN software engineering symposium on High-level debugging, p.173-179, January 1983 [doi>10.1145/800007.808031]
• 3: G.M. Dirlwistle, OJ Dahl, B. Myrhau$, K. Nylpmrd, "Simula Begin'. Charlweli-Bral, 1980.
• 4: B. Bruellp, 'Ada~-__bility and Porlabilily olr Symbolic
• 5: James R. Cardell, Multilingual debugging with the SWAT high-level debugger, Proceedings of the ACM SIGSOFT/SIGPLAN software engineering symposium on High-level debugging, p.180-189, January 1983 [doi>10.1145/800007.808032]
• 6: T.A. Cargill, "lr'be Feel of Pi', Proceedings Winter USBNIX Meeting, Denver, January, 1986.
• 7: T.A. Cargill, 'lmplementatioa of the Bfit Debugger', Software - Practio~ mid IExperienee, 15, pp. 153-168, 1985.
• 8: S.i. Feidmu, "Make - a Program for Maintainins Compumr
• 9: Adele Goldberg, SMALLTALK-80: the interactive programming environment, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1984
• 10: R.E. Gr/swold, M.T. Griswold, "The loon ProlFamm/n8 Lamguage', Prentice-Hail, 1983.
• 11: B.W. Kern/ghan, D.M Ritcbie, "the C Programmim| Language', Prentk~-HaJi, 1978.
• 12: Mary Shaw , William A. Wulf , Ralph L. London, Abstraction and verification in Alphard: defining and specifying iteration and generators, Communications of the ACM, v.20 n.8, p.553-564, Aug. 1977 [doi>10.1145/359763.359782]
• 13: Bjarne Stroustrup, The C++ Programming Language, Third Edition, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1997
• 14: 'Unix Programmers Manual BSD 4.2", University of Califm'- nit. 1984.

INDEX TERMS

Classification:
  D. Software
  D.1 PROGRAMMING TECHNIQUES
  D.2 SOFTWARE ENGINEERING
      D.2.5 Testing and Debugging
          Subjects: Debugging aids
  D.3 PROGRAMMING LANGUAGES
      D.3.2 Language Classifications

          Nouns: C++

General Terms:
Languages, Performance, Verification