Idea: use goto define to trace mfa apply by `erlang:fun_info`

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1

first of all

4> erlang:fun_info(fun foo:baz/2).    
[{module,foo},{name,baz},{arity,2},{env,[]},{type,external}]

I found erlang:fun_info(fun m:f/a) seem always return module and name with fun m:f/a

use goto define to trace

example:

my_rpc:call(Node, m, f, A)

define macro to warp it

-define(RPC_CALL(Node, Fun, A),
  my_rpc:call(Node, erlang:fun_info(F, module), erlang:fun_info(F, name), A)).

then, we can trace by fun m:f/3

?RPC_CALL(Node, fun m:f/3, A)

but is not precompiled

-module(test).

-compile([nowarn_export_all, export_all]).

-define(FUNC(F), erlang:fun_info(F, name)).

a() -> ?FUNC(fun erlang:max/2).

erlc -S test.erl

{function, a, 0, 2}.
  {label,1}.
    {line,[{location,"test.erl",7}]}.
    {func_info,{atom,test},{atom,a},0}.
  {label,2}.
    {move,{atom,name},{x,1}}.
    {move,{literal,fun erlang:max/2},{x,0}}.
    {call_ext_only,2,{extfunc,erlang,fun_info,2}}.

is call_ext_only now