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Static Type Analysis of Dynamically Typed Programming Language

Static Type Analysis of Dynamically Typed Programming Language. Author: Štěpán Šindelář (43600220) Supervisor: Matthew Roberts. The Aim: Static Type Analysis of PHP Code. PHP is a dynamic language → no type information, one variable: multiple types.

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Static Type Analysis of Dynamically Typed Programming Language

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  1. Static Type Analysis of Dynamically Typed Programming Language Author: Štěpán Šindelář (43600220) Supervisor: Matthew Roberts

  2. The Aim: Static Type Analysis of PHP Code PHP is a dynamic language → no type information, one variable: multiple types. Static Analysis: analyse the code without executing it. can guarantee termination and bounds on complexity Aim: use static analysis to infer type information useful for integrated development environments useful for compiler back-ends In the context of Phalanger project The PHP compiler for .NET written in C#

  3. Work to be done • Research into various methods for static analysis • Implementation • Control Flow Graph construction • Generic framework for Data Flow Analysis • Type Analysis based on the generic framework • Evaluation • Final Report & Presentation

  4. Work to be done • Research into various methods for static analysis • Implementation • Control Flow Graph construction • Generic framework for Data Flow Analysis • Type Analysis based on the generic framework • Evaluation (...and bugfixing) • Final Report & Presentation

  5. Type Analysis Based on the Generic Framework • Finish the implementation • Provide a Command Line Interface • for testing & evaluation purposes

  6. Evaluation • Several PHP open source projects • Zend Framework, WordPress, PhpUnit ... • Run the analysis on their source code • fix bugs where possible • record actual errors discovered by the tool • possibly: performance benchmarking • possibly: compare to other tools' results

  7. Final Report & Presentation • Analysing PHP • PHP Semantics Caveats • Theoretical Background • My Approach – theory used and its adaptation to PHP • Existing Software • Implementation • Evaluation

  8. Thank you for you attention QA

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