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abc Compiler

This article delves into the abc Compiler developed at Oxford and McGill University, highlighting its role in Aspect-Oriented Programming (AOP) and the integration of AspectJ with Java. It discusses the unique strengths of the abc framework, including Soot for bytecode translation and visualization support for crosscutting concerns. The document also outlines the conversion from Object-Oriented to Aspect-Oriented Java, along with the benefits and limitations of various AOP techniques. Future directions for AOP research and monitoring functionalities are also examined.

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abc Compiler

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Presentation Transcript

  1. abc Compiler Zak Fry

  2. Who and Where • Programming Tools Group at Oxford University, UK • Oege de Moor • Sable Research Group at McGill University, Quebec • Laurie Hendren

  3. Language and Platform • AspectJ Compiler • Aspect Oriented (compliment to OOP) Extension of Java developed by Xerox PARC • Standalone with Eclipse support for generated code • Visualization support for crosscutting concerns

  4. Architecture and Design • Polyglot – frontend that aids in adding AspectJ to Java • Soot – backend that deals with bytecode and aids in finding aspects/weaving • Inputs: .java and .class files • Outputs: AO .java and .class files

  5. Representations • AspectJ AST • Java AST • Aspect Info • Instructions for weaver • Jimple • Skeleton • Regular IR • Woven IR • Final IR

  6. Uses and Strengths • AspectJ and Aspect Oriented research • Conversion of OO Java to AO Java • Studying, Analyzing, Improving AO techniques • Strengths • Polyglot - Easy to extend or change aspect output • Soot (Jimple) – ease of translation between bytecode, Jimple, Java source • Optimization is much higher than competition

  7. Benchmarks • EAJ – redefinition of “adding variables to pointcuts” – shows ease of adding functionality to abc (AOSD 2005) • Large study April 2006 of many AspectJ programs • Also: runtime verification, tracematches

  8. Limitations • Slower than competitor ajc • Requires ALL aspects to be in source • No separate compilation

  9. Future Work • Mostly individual extensions corresponding to individual projects • Monitoring synchronized blocks • Monitoring shared field access • Etc…

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