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Instrument test utility functions to increase fuzzer efficiency#1915

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DaveLak
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Fuzz Introspector was reporting a high percentage of fuzz blockers in thefuzz_diff test. This means the fuzzing engine was unable to gain visibility into functions lower in the call stack than the blocking functions, making it less effective at producing interesting input data.

This clears a large percentage of the fuzz blockers by adding fuzzer instrumentation to them via the@atheris.instrument_func decorator.

Fuzz Introspector Before & After Screenshots

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Fuzz Introspector was reporting a high percentage of fuzz blockersin the `fuzz_diff` test. This means the fuzzing engine was unableto gain visibility into functions lower in the call stack than theblocking functions, making it less effective at producing interestinginput data.This clears a large percentage of the fuzz blockers by adding fuzzerinstrumentation to them via the `@atheris.instrument_func` decorator.
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Thanks a million! This looks like a tiny change for massive gains.

DaveLak reacted with rocket emoji
@ByronByron merged commitadf4bf0 intogitpython-developers:mainMay 15, 2024
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@DaveLakDaveLak deleted the fix-blockers-in-fuzz-diff branchMay 15, 2024 19:30
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