Clone Detection via Structural Abstraction

Authors William S. Evans, Christoph W. Fraser, Fei Ma

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William S. Evans
Christoph W. Fraser
Fei Ma

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William S. Evans, Christoph W. Fraser, and Fei Ma. Clone Detection via Structural Abstraction. In Structure-Based Compression of Complex Massive Data. Dagstuhl Seminar Proceedings, Volume 8261, pp. 1-10, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2008)


This paper describes the design, implementation, and application of a new algorithm to detect cloned code. It operates on the abstract syntax trees formed by many compilers as an intermediate representation. It extends prior work by identifying clones even when arbitrary subtrees have been changed. On a 440,000-line code corpus, 20- 50%of the clones it detected were missed by previous methods. The method also identifies cloning in declarations, so it is somewhat more general than conventional procedural abstraction.
  • Clone Detection


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