address-sanitizer

SKILL.md

AddressSanitizer (ASan) is a widely adopted memory error detection tool used extensively during software testing, particularly fuzzing. It helps detect memory corruption bugs that might otherwise go unnoticed, such as buffer overflows, use-after-free errors, and other memory safety violations.

ASan is a standard practice in fuzzing due to its effectiveness in identifying memory vulnerabilities. It instruments code at compile time to track memory allocations and accesses, detecting illegal operations at runtime.

| Instrumentation | ASan adds runtime checks to memory operations during compilation | | Shadow Memory | Maps 20TB of virtual memory to track allocation state | | Performance Cost | Approximately 2-4x slowdown compared to non-instrumented code | | Detection Scope | Finds buffer overflows, use-after-free, double-free, and memory leaks |

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