Aliasing in Object-Oriented Programming: Types, Analysis, by Dave Clarke, James Noble, Tobias Wrigstad

By Dave Clarke, James Noble, Tobias Wrigstad

This e-book offers a survey of the state of the art on ideas for facing aliasing in object-oriented programming. It marks the 20 th anniversary of the paper The Geneva conference at the therapy of item Aliasing via John Hogg, Doug Lea, Alan Wills, Dennis de Champeaux and Richard Holt. The 22 revised papers have been rigorously reviewed to make sure the top quality.The contributions are geared up in topical sections at the Geneva conference, possession, concurrency, alias research, controlling results, verification, programming languages, and visions.

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The system shares many similarities with PRFJ, but it uses a simpler type system that aims to be much more user friendly. To cope with some of the reduced expressiveness, the system uses effects to deal with references to domains not identifiable by immutable paths. A number of extensions were presented that can distinguish between read/writes, prevent deadlocks, verify atomicity, and allow locks to be taken at the granularity of single objects. The authors conjecture that adding genericity to the type system will increase expressiveness.

The most-general client is an abstraction of all possible clients that is used to create all possible traces through the box. If execution succeeds, the box never exposes any confined object, irrespective of the program that uses the box. The approach is based on formulating ownership as a semantic property of the program and the subsequent construction of an abstraction of the abstract semantics in the style of Cousot and Cousot [49,50]. A general variation of a points-to analysis-based algorithm to infer ownership and uniqueness is presented by Ma and Foster [100].

Banerjee and Naumann use ownership to show representation independence properties of classes [11,16,15], which enables one implementation of a class to be replaced by another. Ownership is used to indicate which classes are hidden behind the abstraction boundary. Their work has addressed this problem for increasingly sophisticated program models and relaxed restrictions. Much more could be said here. Instead duplicating other excellent work on the topic, we invite the reader to consult other the chapters of this volume that discuss the role of ownership in verification [17,58].

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