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custum mutator: libfuzzer LLVMFuzzerMutate()
This uses the libfuzzer LLVMFuzzerMutate() function in llvm 12.
just type make to build
AFL_CUSTOM_MUTATOR_LIBRARY=custom_mutators/libfuzzer/libfuzzer-mutator.so afl-fuzz ...
Note that this is currently a simple implementation and it is missing two features:
- Splicing ("Crossover")
- Dictionary support
To update the source, all that is needed is that FuzzerDriver.cpp has to receive
#include "libfuzzer.inc"
before the closing namespace bracket.
It is also libfuzzer.inc where the configuration of the libfuzzer mutations are done.
Original repository: https://github.com/llvm/llvm-project Path: compiler-rt/lib/fuzzer/*.{h|cpp} Source commit: df3e903655e2499968fc7af64fb5fa52b2ee79bb