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Certified implementation of a parametrized framework for concurrent garbage collectors
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Correctness-Preserving GC Transformations ========================================= This directory contains implementation and (in the future) formalization of the framework for correctness-preserving derivations of concurrent garbage collectors by Vechev et al. [VYB06]. The structure of the project: - ./Haskell -- a folder with the Haskell prototype of parametrised expose functions. Different dimensions are implemented as type classes with mutually-disjoint functions, specifying the corresponding partitions. ---- GCDerivation.hs -- this file contains implementation of the main GC machinery concerning parametrized instances of the explore function. The same file also contains definitions of all the dimension type classes. ---- ExampleXY.hs -- example files, corresponding to the case studies labelled as X.Y in the [VYB06] paper. The comments after the expressions describe the results obtained by evaluating them. - ./Coq -- a Coq formalization of the collector's exposing functions and their correctness wrt. graph reachability ---- Heaps -- a library of partial heaps, developed by Aleks Nanevski (see http://software.imdea.org/fcsl for details). ---- Hgaphs.v -- a theory of object graphs, including facts about allocation/mutation. ---- Logs.v -- implementation of collector/mutator logs ---- Wavefronts.v -- A library for wavefronts ---- Apex.v -- implementation of the "apex" expose procedure ---- WavefrontDimension.v -- Parametrizing the expose over the wavefront dimension. Building the project ==================== -- Haskell -- Run make clean; make from the folder "Haskell" to compile the project. Individual example files can be loaded into the ghci REPL as follows :load ExampleXY.hs -- Coq -- Run make clean; make from the folder "Coq". This will build the necessary libraries and the GC formalizaion. References ========== [VYB06] M. Vechev, E. Yahav, D. Bacon. Correctness-Preserving Derivation of Concurrent Garbage Collection Algorithms. PLDI'06.