基于内存保护键值的细粒度访存监控  

Fine-grained memory access monitoring based on memory protection keys

作　　者：王睿伯[1] 吴振伟 张文喆 邬会军 张于舒晴 卢凯[1] WANG Rui-bo;WU Zhen-wei;ZHANG Wen-zhe;WU Hui-jun;ZHANG-YU;Shu-qing;LU Kai(College of Computer Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2024年第1期21-27,共7页Computer Engineering & Science

基　　金：国家重点研发计划(2021YFB0300100);国防科技大学HPCL重点实验室项目(202101-04)。

摘　　要：基于内存保护键值硬件扩展,提出了一种轻量化且细粒度的页保护机制。突破了传统页保护方法仅支持页粒度访存监控的技术局限,实现了能够拦截每个访存操作的细粒度页保护机制。充分利用内存保护键值提供的用户态线程局部页访问权限控制,性能开销相比传统页保护的降低了30%以上。通过融合细粒度页保护与编译插桩,弥补了传统编译插桩方法无法覆盖程序中不可重编译部分的局限性。Based on memory protection key hardware extensions,a lightweight and fine-grained page protection mechanism is proposed.This mechanism overcomes the technical limitations of traditional page protection methods that only support page-grained memory access monitoring,and achieves fine-grained page protection that can intercept each memory access operation.By fully utilizing the user-level thread-local page access permission control provided by memory protection keys,the performance overhead is reduced by more than 30%compared to traditional page protection.Through the integration of fine-grained page protection and compiler instrumentation,the limitations of traditional compiler instrumentation methods that cannot cover non-recompilable portions of programs are addressed.

关 键 词：访存监控 内存保护键值 页保护 编译插桩 

分 类 号：TP314[自动化与计算机技术—计算机软件与理论]