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libafl

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Builds custom fuzzers with LibAFL, the modular Rust fuzzing library. Covers composing observers, feedbacks, mutators, schedulers, and executors into a fuzzer for targets the standard tools do not fit. Use when writing a bespoke fuzzer or mutator, fuzzing a non-standard target or architecture, implementing a fuzzing research idea, or when libFuzzer and AFL++ lack the control you need.

When to use

• You need custom mutation strategies or feedback mechanisms
• Standard fuzzers don't support your target architecture
• You want to implement novel fuzzing techniques
• You need fine-grained control over fuzzing components
• You're conducting fuzzing research

When not to use

• quick setup, single-threaded fuzzing
• general purpose multi-core fuzzing without custom needs

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