A framework for simulating heterogeneous virtual processors

The paper examines the layered software modules of a heterogeneous multiprocessor simulator and debugger, and the design patterns that span these modules. Lucent's LUxWORKS simulator and debugger, works with multiple processor architectures. Its modeling infrastructure, processor models, processor monitor/control, hardware control, vendor simulator interface and Tcl/Tk extension layers are spanned by the following design patterns: (1) build and extend abstract virtual processors; (2) build reflective entities; and (3) build a covariant extensible system. Together these modules and patterns define a processor execution architecture that encourages reuse and dynamic extensibility.