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Erschienen in:
2009 | OriginalPaper | Buchkapitel
PyGirl: Generating Whole-System VMs from High-Level Prototypes Using PyPy
verfasst von : Camillo Bruni, Toon Verwaest
Erschienen in: Objects, Components, Models and Patterns
Verlag: Springer Berlin Heidelberg
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Virtual machines (VMs) emulating hardware devices are generally implemented in low-level languages for performance reasons. This results in unmaintainable systems that are difficult to understand. In this paper we report on our experience using the
PyPy
toolchain to improve the portability and reduce the complexity of whole-system VM implementations. As a case study we implement a VM prototype for a Nintendo Game Boy, called
PyGirl
, in which the high-level model is separated from low-level VM implementation issues. We shed light on the process of refactoring from a low-level VM implementation in Java to a high-level model in RPython. We show that our whole-system VM written with
PyPy
is significantly less complex than standard implementations, without substantial loss in performance.