ppx_fbt_trace is a ppx rewrite of the camlp4 extension pa_fbt_trace (see
here). Quoting the explanation found there:
This ppx extension introduces simple function boundary tracing to an OCaml program. Every toplevel function is rewritten to print a line whenever it is called, allowing you to trace through all the functions being called.
This is only intended for debug use and not for production servers, since the volume of data produced is really quite high.
Contact: Nicolas Ojeda Bar
opam switch 4.02.0+trunk
opam install ANSITerminal ppx_tools ocamlfind
And then, manually:
git clone https://github.com/nojb/ppx_fbt_trace
cd ppx_fbt_trace
make
make install
ocamlfind ocamlc -package ppx_fbt_trace -linkpkg <file>.ml