摘要
针对传统的WCET(Worst-Case Execution Time)分析方法面临的精度不高和用户使用繁琐问题,提出一种自动分析程序模式的方法并据此设计实现了一个面向Web的WCET分析系统。首先在对源程序进行分析的基础上,利用程序控制流程图,通过数据流框架进行切片,获得依赖于输入变量的无循环控制流程图ICFG。然后,通过对ICFG每条路径求解,获得程序的模式及其输入表达式,并计算其对应的WCET。最后,将上述分析方法设计实现为针对C语言的动态链接库(DLL),并利用该DLL实现一个面向Web的WCET自动分析系统——WCET Mode Analyzer。WCET Mode Analyzer对基准程序的分析结果,验证了该方案的有效性和应用的简便性。
In light of the problems of deficient precision and troublesome usage the traditional WCET analysis systems usual suffer,a new automatic analysis method based on program modes is proposed and a WCET analysis system on the idea of the method for Web is designed. Firstly,a method is presented based on the analysis of source code which produces an acyclic input parameter dependent control flow graph called ICFG by using program control flow graph and a specific program slicing under data flow framework. Secondly,by constructing a solution system for each path in ICFG,a mode and its input parameter expression maybe conducted,and the WCET value of a mode can be computed. Finally,a Dynamic link library（DLL） is implemented based on the method above for C language in order to be used by different systems,and an automated analysis system in the Web by using the DLL is realized,which is called WCET Mode Analyzer. The result for a Benchmark implemented by the analysis system shows the effectiveness of the solution and the characteristics of using conveniently.
出处
《计算机应用与软件》
2017年第2期236-241,271,共7页
Computer Applications and Software
基金
河南省科技计划项目(152300410115)
