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An Operational Semantics for JavaScript

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Programming Languages and Systems (APLAS 2008)

Part of the book series: Lecture Notes in Computer Science ((LNPSE,volume 5356))

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We define a small-step operational semantics for the ECMAScript standard language corresponding to JavaScript, as a basis for analyzing security properties of web applications and mashups. The semantics is based on the language standard and a number of experiments with different implementations and browsers. Some basic properties of the semantics are proved, including a soundness theorem and a characterization of the reachable portion of the heap.

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  1. AdSafe: Making JavaScript safe for advertising,

  2. Google-Caja, A.: source-to-source translator for securing JavaScript-based Web,

  3. Jscript (Windows Script Technologies),

  4. Rhino: Javascript for Java,

  5. Abadi, M., Cardelli, L.: A Theory of Objects. Springer, Heidelberg (1996)

    Book  MATH  Google Scholar 

  6. Adida, B.: BeamAuth: two-factor Web authentication with a bookmark. In: ACM Computer and Communications Security, pp. 48–57 (2007)

    Google Scholar 

  7. Anderson, C., Giannini, P., Drossopoulou, S.: Towards type inference for JavaScript. In: Black, A.P. (ed.) ECOOP 2005. LNCS, vol. 3586, pp. 428–452. Springer, Heidelberg (2005)

    Chapter  Google Scholar 

  8. Eich, B.: Javascript at ten years,

  9. Fisher, K., Honsell, F., Mitchell, J.C.: A lambda calculus of objects and method specialization. Nordic J. Computing (formerly BIT) 1, 3–37 (1994)

    MathSciNet  MATH  Google Scholar 

  10. Flanagan, D.: JavaScript: The Definitive Guide. O’Reilly, Sebastopol (2006),

    MATH  Google Scholar 

  11. Herman, D.: Classic JavaScript,

  12. Herman, D., Flanagan, C.: Status report: specifying JavaScript with ML. In: ML 2007: Proc. Workshop on ML, pp. 47–52 (2007)

    Google Scholar 

  13. ECMA International. ECMAScript 4,

  14. ECMA International. ECMAScript language specification. stardard ECMA-262, 3rd Edition (1999),

  15. Maffeis, S., Mitchell, J., Taly, A.: Complete ECMA 262-3 operational semantics and long version of present paper. Semantics: Paper:

  16. Mitchell, J.C.: Toward a typed foundation for method specialization and inheritance. In: POPL 1990, pp. 109–124 (1990)

    Google Scholar 

  17. Mozilla. Spidermonkey (javascript-c) engine,

  18. Reis, C., Dunagan, J., Wang, H., Dubrovsky, O., Esmeir, S.: Browsershield: Vulnerability-driven filtering of dynamic HTML. ACM Transactions on the Web 1(3) (2007)

    Google Scholar 

  19. Siek, J., Taha, W.: Gradual typing for objects. In: Ernst, E. (ed.) ECOOP 2007. LNCS, vol. 4609, pp. 2–27. Springer, Heidelberg (2007)

    Chapter  Google Scholar 

  20. The FaceBook Team. FBJS,

  21. Thiemann, P.: Towards a type system for analyzing JavaScript programs. In: Sagiv, M. (ed.) ESOP 2005, vol. 3444, pp. 408–422. Springer, Heidelberg (2005)

    Chapter  Google Scholar 

  22. Thiemann, P.: A type safe DOM api. In: Bierman, G., Koch, C. (eds.) DBPL 2005. LNCS, vol. 3774, pp. 169–183. Springer, Heidelberg (2005)

    Chapter  Google Scholar 

  23. Ungar, D., Smith, R.B.: Self: The power of simplicity. In: Proc. OOPSLA, vol. 22, pp. 227–242 (1987)

    Google Scholar 

  24. Yu, D., Chander, A., Islam, N., Serikov, I.: JavaScript instrumentation for browser security. In: ACM POPL, pp. 237–249 (2007)

    Google Scholar 

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© 2008 Springer-Verlag Berlin Heidelberg

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Maffeis, S., Mitchell, J.C., Taly, A. (2008). An Operational Semantics for JavaScript. In: Ramalingam, G. (eds) Programming Languages and Systems. APLAS 2008. Lecture Notes in Computer Science, vol 5356. Springer, Berlin, Heidelberg.

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-89329-5

  • Online ISBN: 978-3-540-89330-1

  • eBook Packages: Computer ScienceComputer Science (R0)

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