消息传递的MSVL通信机制及其实现

摘要

建模、仿真和验证语言(MSVL)是一种时序逻辑编程语言,它是投影时序逻辑(PTL)的可执行子集.MSVL和PTL可用于并发系统的建模和性质验证.然而,MSVL缺少一种消息传递的通信机制,这种机制对于并发分布式系统的建模和验证至关重要.说明了如何在MSVL中开发和实现合适的机制来对分布式系统进行建模和验证.该机制首先定义了通道结构,对通信语句和进程结构进行形式化描述;接着介绍了这些通信语句的实现机制;最后提供了一个关于电子合同签名协议的建模和验证实例,说明消息传递在MSVL中的工作原理.%The modeling,simulation and verification language (MSVL) is a temporal logic programming language as well as an executable subset of projection temporal logic (PTL).MSVL and PTL are used for modeling and verifying properties of concurrent systems.However,MSVL lacks a mechanism of communication based on message passing which is essential for modeling and verifying concurrent distributed systems.This paper shows how to develop and implement a suitable mechanism in MSVL to model and verify concurrent distributed systems.First,channel structure is defined while communication statements and process structures are formalized.Then,the implementation mechanisms for those communication statements are presented.Finally,a modeling and verification example involving an electronic contract signing protocol is provided to illustrate how the message passing works in MSVL.