This fuzzer shows how to implement Grimoire fuzzer, a fully automated coverage-guided fuzzer which works without any form of human interaction or pre-configuration. libafl::mutators::grimoire provides four mutators : GrimoireExtensionMutator,GrimoireRecursiveReplacementMutator, GrimoireStringReplacementMutator,GrimoireRandomDeleteMutator.

The fuzzer will regard all files in ./corpus as inputs. Inputs will be mutated by mutator(havoc_mutations) and grimoire_mutator. harness will firstly check if input contains substring fn or pippopippo then print the input mutated by grimoire_mutator.

NOTE: This harness is not designed for a crash, so cargo run will not terminate.