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Anchored Text for Software Weaving and Merging

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1 Author(s)
Varma, P. ; IBM India Res. Lab., Institutional Area, New Delhi, India

Text-based software merge/refactoring systems are predominantly used. Anchored text, a datatype with first-class location anchors and greater commutativity of software merge operations has been proposed recently. In this paper we develop anchored text as a novel weaver for simultaneous, separate concerns. Irregular, crosscutting concerns such as porting issues are applicable simultaneously (multi-dimensional separation of multi-target porting concerns), in order to allow for choice of a desired subset for a given port. Form-checking rules can be specified with individual concerns, to verify their correct weaving. The simultaneous concerns model can be viewed as an offline, concurrent change weaving problem, according to which a direct implementation is provided. A novel wait-free implementation of an online model, wherein concurrent changes arrive in a dynamic sequence but with fixed scheduling tags is provided and a highly-concurrent version of the same described using speculative scheduling. All these implementations use minimal synchronisation primitives only, namely atomic registers.

Published in:

Secure Software Integration and Reliability Improvement, 2009. SSIRI 2009. Third IEEE International Conference on

Date of Conference:

8-10 July 2009