Debugging Erlang application

debugging-erlang.erl

%% more information available at:
%%  * https://erlang.org/doc/man/dbg.html
%%  * https://stackoverflow.com/questions/1954894/using-trace-and-dbg-in-erlang

%% start tracer
dbg:tracer().

%% specify what to trace
dbg:p(all, c). %% calls to any of specified functions
dbg:p(all, [c, m]). %% calls and messages
dbg:p(new, c). %% calls from newly spawned process from now on
dbg:p(Pid, c). %% calls from process ID

%% specify function call to trace
dbg:tp(mymodule, apifun, cx). %% exported fun
dbg:tp(mymodule, apifun, 3, cx). %% exported fun with arity
dbg:tpl(mymodule, localfun, cx). %% local fun
dbg:tpl(mymodule, localfun, 3, cx). %% local fun with arity

%% stop and clear tracer
dbg:stop_clear().