Asynchronous transfer of control in the RTSJ-compliant Java processor

Asynchronous transfer of control (ATC) is a crucial mechanism for real-time applications, and is currently provided in the real-time specification for Java (RTSJ). This paper proposes a framework to implement ATC in the RTSJ-compliant Java processor based on the instruction optimization method proposed in our previous work. Because most of the processing is done before bytecode execution in this method, the implementation using our framework is straightforward. Moreover, its worst case execution time (WCET) is more predictable.