How can I verify that the erlang process is in sleep mode?

Question

Is there any way to verify that the erlang process was indeed sleeping. erlang:process_info/1 does not seem to provide this information, and I cannot come up with anything that could.

Answer 1

Its current function should be erlang:hibernate/3 .

 1> erlang:process_info(Pid, current_function). {current_function,{erlang, hibernate, 3}} 

Answer 2

Here's how to do it in Elixir:

 iex(2)> :erlang.process_info(pid, :current_function) {:current_function, {:erlang, :hibernate, 3}}