About ft metric of libfuzzer

[taotao gu]

Hello all,

I have a question about the ft metric in libfuzzer, I have recently run several libfuzzers with different strategies, and the cov in the xml of libxml2 is similar, but the ft is very different, and the more ft found a crash.
Could you please tell me where is the code introduction related to ft? Could you guide me.
Thanks.