"__sanitizer_weak_hook_compare_bytes" is defined by jazzer or libfuzzer?

[Cen Zhang]

May I inquire that where is the definition of __sanitizer_weak_hook_compare_bytes? Is it defined by jazzer and finally invokes __sanitizer_weak_hook_memcmp?

I'm confused about this and would like to seek some guidance. In my guess, it is defined by jazzer and finally passed all coming arguments to libfuzzer's __sanitizer_weak_hook_memcmp.

Thanks.

[Cen Zhang]

Found it at here