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System Support for . . . PRODUCTION RUNS

By Feng Qin


As hardware performance and dependability have dramatically improved in the past few decades, the software dependability issues are becoming increasingly important. Unfortunately, many studies show that software bugs, which inevitably slip through various bug detection methods and even the strictest testing before releasing, can greatly affect software dependability during production runs. To improve software dependability during production runs, this dissertation proposes to address software bugs at multiple levels by leveraging support from the underlying hardware, the OS kernel, and the middle-layer runtime. The proposed multi-level defenses address software bugs and their effects at different stages of program execution. The first-level defense detects software bugs once they are triggered. The detection at the earliest stage can effectively prevent further propagation of errors that are caused by the software bugs. It would be perfect if we could detect all the software bugs at the first-level defense. However, some bugs may still slip through the first-level defense and may be exploited by security attacks. The second-level defense is to detect the exploitation of software bugs in order to control the system damage caused by the potentially exploited bugs. Due to the limitation of the tools or methods deployed in the first-level and second-level defenses, some bugs may stil

Year: 2006
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