形式化评估系统挂起检测器的系统行为

Long Wang, Z. Kalbarczyk, R. Iyer
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引用次数: 8

摘要

本文提出了一种形式化验证系统挂起检测器检测能力的方法。为了实现这一目标,创建了一个典型Linux系统的抽象形式化模型,以彻底测试可能导致挂起的所有执行场景。目标是暴露逃脱检测的案例(即挂起场景)。我们的系统模型抽象了Linux系统中存在的基本硬件(例如,定时器,硬件计数器)和软件(例如,进程/线程)组件。该模型能够:(i)捕获这些组件的行为,以描述导致挂起的执行场景,以及(ii)评估挂起检测覆盖率。显式状态模型检查用于推断系统行为并发现逃避检测的挂起场景。结果表明,所提出的框架允许识别逃避检测的挂起场景的边缘案例,并为开发人员增强检测机制提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Formalizing System Behavior for Evaluating a System Hang Detector
This paper presents an approach to formally verify the detection capability of a system hang detector. To achieve this goal, an abstract formal model of a typical Linux system is created to thoroughly exercise all execution scenarios that may lead to hangs. The goal is to expose cases (i.e., hang scenarios) that escape detection. Our system model abstracts the basic hardware (e.g., timer, hardware counter) and software (e.g., processes/threads) components present in the Linux system. The model enables: (i) capturing behavior of these components so as to depict execution scenarios that lead to hangs, and (ii) evaluating hang detection coverage. Explicit-state model checking is applied to reason about system behavior and uncover hang scenarios that escape detection. The results indicate that the proposed framework allows identification of corner cases of hang scenarios that escape detection and provides valuable insight to developers for enhancing detection mechanisms.
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