Improved Code Clone Categorization

Google Tech Talk June 24, 2010 Presented by Dr. Nicholas A. Kraft. ABSTRACT Because 50% to 90% of developer effort during software maintenance is spent on program comprehension activities, techniques and tools that can reduce the effort spent by developers on these activities are required to reduce maintenance costs. One characteristic of a software system that can adversely affect its comprehensibility is the presence of similar or identical segments of code, or code clones. To promote developer awareness of the existence of code clones in a system, researchers recently have directed much attention to the problem of detecting these clones; these researchers have developed techniques and tools for clone detection and have discovered that significant portions of popular software systems such as the Linux kernel are cloned code. However, knowledge of the existence of clones is not sufficient to allow a developer to perform maintenance tasks correctly and completely in the presence of clones. Proper performance of these tasks requires a deep and complete understanding of the relationships among the clones in a system. Thus, new techniques and tools that will assist developers in the analysis of large numbers of clones are a critical need. In this talk I will describe preliminary work on code clone categorization that I am leading at The University of Alabama. In particular, I will describe the development of techniques and tools for categorization of code clones using ...



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