Design fault tolerance in operating systems based on a standardization project

Abstract

We are exploring an MLDD (Multi-Layered Design Diversity) architecture that applies natural design diversity to an application program layer, an operating system layer, and a hardware layer based on the TRON standardization project. We have devised a backward error recovery mechanism for the operating system layer, and to implement it, we have developed a mechanism that automatically exchanges diverse operating system implementations. The paper presents an error-check generation method for the operating system layer. In this method, which is called SBACCG (Specification-Based Adaptive Consistency Checks Generation), one set of consistency checks is derived from a formal specification, and the checks are adapted to each implementation. We experimentally evaluated the effectiveness of our backward error recovery mechanism that uses the error checks generated through SBACCG.<>