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Semantic specifications do not make a systematic connection between the names and scopes in the static structure of a program and memory layout, and access during its execution. In this paper, we introduce a systematic approach to the alignment of names in static semantics and memory in dynamic semantics, building on the scope graph framework for name resolution. We develop a uniform memory model consisting of frames that instantiate the scopes in the scope graph of a program. This provides a language-independent correspondence between static scopes and run-time memory layout, and between static resolution paths and run-time memory access paths. The approach scales to a range of binding features, supports straightforward type soundness proofs, and provides the basis for a language-independent specification of sound reachability-based garbage collection.
@InProceedings{bachpoulsen_et_al:LIPIcs.ECOOP.2016.20,
author = {Bach Poulsen, Casper and N\'{e}ron, Pierre and Tolmach, Andrew and Visser, Eelco},
title = {{Scopes Describe Frames: A Uniform Model for Memory Layout in Dynamic Semantics}},
booktitle = {30th European Conference on Object-Oriented Programming (ECOOP 2016)},
pages = {20:1--20:26},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-95977-014-9},
ISSN = {1868-8969},
year = {2016},
volume = {56},
editor = {Krishnamurthi, Shriram and Lerner, Benjamin S.},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2016.20},
URN = {urn:nbn:de:0030-drops-61140},
doi = {10.4230/LIPIcs.ECOOP.2016.20},
annote = {Keywords: Dynamic semantics, scope graphs, memory layout, type soundness, operational semantics}
}