Jinja is not Java

Gerwin Klein 🌐 and Tobias Nipkow 🌐

June 1, 2005

Abstract

We introduce Jinja, a Java-like programming language with a formal semantics designed to exhibit core features of the Java language architecture. Jinja is a compromise between realism of the language and tractability and clarity of the formal semantics. The following aspects are formalised: a big and a small step operational semantics for Jinja and a proof of their equivalence; a type system and a definite initialisation analysis; a type safety proof of the small step semantics; a virtual machine (JVM), its operational semantics and its type system; a type safety proof for the JVM; a bytecode verifier, i.e. data flow analyser for the JVM; a correctness proof of the bytecode verifier w.r.t. the type system; a compiler and a proof that it preserves semantics and well-typedness. The emphasis of this work is not on particular language features but on providing a unified model of the source language, the virtual machine and the compiler. The whole development has been carried out in the theorem prover Isabelle/HOL.

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BSD License

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× 
@article{Jinja-AFP,
  author  = {Gerwin Klein and Tobias Nipkow},
  title   = {Jinja is not Java},
  journal = {Archive of Formal Proofs},
  month   = {June},
  year    = {2005},
  note    = {\url{https://isa-afp.org/entries/Jinja.html},
             Formal proof development},
  ISSN    = {2150-914x},
}
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