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Memory safety sanitizers, the sharp weapon for detecting invalid memory operations during execution, employ runtime metadata to model the memory and help find memory errors hidden in the programs. However, location-based methods, the most widely deployed memory sanitization methods thanks to their high compatibility, face the low protection density issue: the number of bytes safeguarded by one metadata is limited. As a result, numerous memory accesses require loading excessive metadata, leading to a high runtime overhead.
Ling et al. (Mon,) studied this question.
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