Found no other way to use those than copy/pasting code from
Google pprof repo.
The version used here is
3ea8567
from Dec 6th 2018.
I had to replace https://github.com/google/pprof/internal
by https://github.com/ufoot/livepprof/internal/google and that's it.
Any other options is welcome, I hate copy/pasting code,
this is going to go out-of-sync, OTOH did not feel like
rewriting all this, and found no other public, importable binary parser,
especially written in native Go.