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Modular Compilation Strategies for AspectJ Constructs to Nu Intermediate Language

o# th« Nu pro^ct et Mtp!//«wwxt.lMUttu

Broad Problem

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Cow«f<wal    (AO) c«

Nu: Enhanced Intermediate Language Prescrves Modulartty

• New constructs:

• bind and r*move

» Language semanties o Iłowi static ji well as dynamie deployment of aspeets

Semeni«% of bind and /wnova

Technical Contnbutions Modular compilation strategies for contro! fk>w, mstanttjtioo, and dynamie check constructs

•    Support for these compilation strategies in a production tevel compiler for AspectJ

Software Engioeenog Benefits

•    X mproved Scalability of Developmcnt Proces tes

•    c g. by improving mcrcmcntal compilation of AO programs

•    Afford the !mproved benefit of separatlon of concerns cna bied by AOSO to large-scale software Systems

•    Ot ber potcntial benefits:

•    Xmproved post compilation processes e.g. dcbuggmg Lower cost of devełoping robust tool support Morę opportunities for optlmlzations

Problem: Compilers implement non-Jocal translation for most AO constructs

•    Reguirements for compilation strategies [must bokf for both classes snd sspects)

•    Modular: A modules im ple men ta Ilon and the spcciftcatlon of the referred modules are suffioent to compile it

•Textualty Local: generated Intermediate codę for a source module is conftned to a single module in the objcct codę

•    Oeveloped compilation strategies for AspectJ constructs

•    Contro! How constructs: cflow A cflowbeftow

•    Instantiatlon constructs: perthls, pertarget, per cflow, percftowbelow

•    Dynamie checks: łf, this, target. args

•    Implemented these strategies as an cxtension of the AspectJ compiler

Traditional w Modular Compilation Example Modular Compilation Strategy for Cflow

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AO modularity t» maintained in objęci codę

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Department of Computer Science Rakesh Setty, Robert Oyer and Hridesh Rajan IOWA STATE UNIYERSITY

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