// Prefer a custom mutator that accepts the performance score as an energy value.
if (dll_mutate_testcase_with_energy_ptr)
if (dll_mutate_testcase_with_energy_ptr(argv, in_buf, len, perf_score, common_fuzz_stuff))
goto abandon_entry;
else if (dll_mutate_testcase_ptr)
if (dll_mutate_testcase_ptr(argv, in_buf, len, common_fuzz_stuff))
goto abandon_entry;
dll_mutate_testcase_with_energy_ptr must defind when you just want uses dll_mutate_testcase_ptr.
https://github.com/googleprojectzero/winafl/blob/99aec0723e86e1e4d6702e5a5bd36fbf0b113cf5/afl-fuzz.c#L5661