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Soot for dummies
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Leandro
August 06, 2013
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Soot for dummies
Leandro
August 06, 2013
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Soot Framework for analysis, transformation and optimization of Java programs
Support for both intra-procedural and inter-procedural Many built-in analyses and optimizations are available Provides intermediate representations of Java code Jimple, Shimple, Baf, Grimp 1 / 7
Jimple Main intermediate representation used in Soot. Key characteristics: Stackless,
typed 3-address code Simplified set of instructions Suitable for analysis and optimization 2 / 7
From Java to Jimple: Example 3 / 7
Processing of Java classes via Soot 1. Parsing Java sources
or class files into Jimple IR 2. Processing of various IRs in several phases Figura : Intra-procedural execution flow 4 / 7
Using data-flow framework A checklist of your obligations: 1. Subclass*FlowAnalysis
ForwardFlowAnalysis BackwardFlowAnalysis ForwardBranchedFlowAnalysis 2. Implement abstraction: merge(), copy() 3. Implement flow function: flowThrough() 4. Implement initial values: newInitialFlow() and entryInitialFlow() 5. Implement constructor (it must call doAnalysis()) 5 / 7
Using data-flow framework: TrulyLiveVariables 6 / 7
Soot for dummies Leandro Lera Romero 1Departamento de Computaci´ on
Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires 5 de agosto de 2013