虚拟机中关于内存保护的故障隔离技术研究  

Research for fault isolation of memory protection in virtual machines

作　　者：王小光[1] 夏克俭[1] 张焕生[1] 

机构地区：[1]北京科技大学信息工程学院计算机系,北京100083

出　　处：《计算机工程与设计》2008年第16期4315-4318,共4页Computer Engineering and Design

摘　　要：讨论了虚拟机中如何实现内存保护的技术并对其进行研究。在相互协作的软件模块中提供故障隔离的一种方法是将各个软件模块放在他自己的地址空间中,然而在高度耦合的模块中,这无疑会导致上下文切换的时间开销,为了在虚拟机中解决这一问题,最终给出了一个软件方法使得故障隔离在单一的地址空间就可以实现。试验结果表明,这是一个高效的基于软件的内存保护技术,并且该技术已经成功应用在了一个实际的虚拟机中。A research of memory protection technology and how to implement are discussed. One way to provide fault isolation among cooperating software modules is to place each in its own address space. However, for tightly-coupled modules, this method would be lead to context switch overhead. To solve this problem in VM, a technology is introduled, which present a software approach to implementing fault isolation within a single address space. It is to be checked that this method is efficient software-based fault isolation, and this technology have been successfully used in an actual virtual machines.

关 键 词：内存保护 故障隔离 沙箱 段匹配 虚拟机 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]