Inferring Region Types via an Abstract Notion of Environment Transformation

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Presents a region-type inference that summarizes each method as an abstract transformation so the method body is analyzed once even for many region-varied calls, using equality and subtyping constraints and a fixed-point algorithm to produce an abstract method table T. Access graphs are used to finitely represent field paths so the inference always terminates; composition and join of summaries trade precision for speed (composition yields a less-precise but cheaper update). Implementation work is ongoing.

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" chapters (11)

1. 0:00Introduction
2. 1:03Motivation for static analysis
3. 3:12Region types and their use
4. 6:00Environment transformations
5. 9:55Generalizing types
6. 12:02Handling access paths
7. 17:21Constraint solving
8. 21:16Efficiency versus precision
9. 21:37Type inference algorithm
10. 24:49Summary and future
11. 25:54Q&A