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CFA2: A Context-Free Approach to Control-Flow Analysis

  • Dimitrios Vardoulakis
  • Olin Shivers
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6012)

Abstract

In a functional language, the dominant control-flow mechanism is function call and return. Most higher-order flow analyses, including k-CFA, do not handle call and return well: they remember only a bounded number of pending calls because they approximate programs with control-flow graphs. Call/return mismatch introduces precision-degrading spurious control-flow paths and increases the analysis time.

We describe CFA2, the first flow analysis with precise call/return matching in the presence of higher-order functions and tail calls. We formulate CFA2 as an abstract interpretation of programs in continuation passing style and describe a sound and complete summarization algorithm for our abstract semantics. A preliminary evaluation shows that CFA2 gives more accurate data-flow information than 0CFA and 1CFA.

Keywords

Abstract Interpretation Call Site Abstract Semantic Path Edge Local Semantic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Dimitrios Vardoulakis
    • 1
  • Olin Shivers
    • 1
  1. 1.Northeastern University 

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