Formal Analysis of Concurrent Java Systems

Welch, Peter H. and Martin, Jeremy M. R. (2000) Formal Analysis of Concurrent Java Systems. In: Communicating Process Architectures 2000, sep, 2000, Canterbury, UK. (Full text available)

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Abstract

Java threads are synchronised through primitives based upon monitor concepts developed in the early 1970s. The semantics of Java's primitives have only been presented in natural language � this paper remedies this with a simple and formal CSP model. In view of the dif�culties encountered in reasoning about any non-trivial interactions between Java threads, being able to perform that reasoning in a formal context (where careless errors can be highlighted by mechanical checks) should be a considerable con�dence boost. Further, automated model-checking tools can be used to root out dangerous states (such as deadlock and livelock), �nd overlooked race hazards and prove equivalence between algorithms (e.g. between optimised and unoptimised versions). A case study using the CSP model to prove the correctness of the JCSP and CTJ channel implementations (which are built using standard Java monitor synchronisation) is presented. In addition, the JCSP mechanism for ALTing (i.e. waiting for and, then, choosing between multiple events) is veri�ed. Given the history of erroneous implementations of this key primitive, this is a considerable relief.

Item Type: Conference or workshop item (Paper)
Uncontrolled keywords: Java, threads, monitors, CSP, JCSP, CTJ, formal verification
Subjects: Q Science > QA Mathematics (inc Computing science) > QA 76 Software, computer programming,
Divisions: Faculties > Science Technology and Medical Studies > School of Computing
Depositing User: Mark Wheadon
Date Deposited: 12 Sep 2009 19:16
Last Modified: 04 Jun 2014 11:05
Resource URI: http://kar.kent.ac.uk/id/eprint/21982 (The current URI for this page, for reference purposes)
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