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Program-synchronous exceptions, for example, breakpoints, watchpoints, illegal opcodes, and memory access violations, provide information about exceptional conditions, interrupting the program and vectoring to an operating system handler. Over the last decade, however, programs and run-time systems have increasingly employed these mechanisms as a performance optimization to detect normal and expected conditions. Unfortunately, current architecture and operating system structures are designed for exceptional or erroneous conditions, where performance is of secondary importance, rather than normal conditions. Consequently, this has limited the practicality of such hardware-based detection mechanisms.
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Thekkath et al. (Tue,) studied this question.
www.synapsesocial.com/papers/6a120a583759512844341d59 — DOI: https://doi.org/10.1145/195473.195515
Chandramohan A. Thekkath
Henry M. Levy
University of Washington
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