Execution Context Migration within a Standard Java Virtual Machine Environment

This paper proposes and evaluates a mechanism for preserving and restoring the execution state of Java applications. A framework is developed, utilising the functionality provided in the Java Platform Debugging Architecture to locate the exact instruction of computation, at the time of program suspension. With the aid of bytecode modification, processing is resumed at the point of suspension, without repeating executed statements. This framework exhibits a low object code growth rate, between 4% and 17%, a substantial reduction in comparison to existing systems. Additionally, the execution overhead placed upon running applications is a minimal 7%. This is in contrast to the cost of state capture and restoration, which incurs a substantial performance penalty of approximately one second per stack frame, and thus requires future work.