Transcript abc Compiler

abc Compiler
Zak Fry
Who and Where
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Programming Tools
Group at Oxford
University, UK
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Oege de Moor
Sable Research Group at
McGill University,
Quebec
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Laurie Hendren
Language and Platform
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AspectJ Compiler
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Aspect Oriented (compliment
to OOP) Extension of Java
developed by Xerox PARC
Standalone with Eclipse
support for generated code
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Visualization support for
crosscutting concerns
Architecture and Design
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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
Representations
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AspectJ AST
Java AST
Aspect Info
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Instructions for weaver
Jimple
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Skeleton
Regular IR
Woven IR
Final IR
Uses and Strengths
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AspectJ and Aspect Oriented research
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Conversion of OO Java to AO Java
Studying, Analyzing, Improving AO techniques
Strengths
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Polyglot - Easy to extend or change aspect output
Soot (Jimple) – ease of translation between
bytecode, Jimple, Java source
Optimization is much higher than competition
Benchmarks
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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
Limitations
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Slower than competitor ajc
Requires ALL aspects to be in source
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No separate compilation
Future Work
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Mostly individual extensions corresponding
to individual projects
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Monitoring synchronized blocks
Monitoring shared field access
Etc…