Problem Statement

Many programming languages allow for introspection of the current call stack environment. This can be for a variety of purposes such as enforcing security checks, debugging, or for getting access to the stack frame of callers.

Print out (in a manner considered suitable for the platform) the current call stack. The amount of information printed for each frame on the call stack is not constrained, but should include at least the name of the function or method at that level of the stack frame. You may explicitly add a call to produce the stack trace to the (example) code being instrumented for examination. The task should allow the program to continue after generating the stack trace. The task report here must include the trace from a sample program.

Let's start with the solution:

defmodule Stack_traces do
  def main do
    {:ok, a} = outer
    IO.inspect a
  end
  
  defp outer do 
    {:ok, a} = middle
    {:ok, a}
  end 
  
  defp middle do
    {:ok, a} = inner
    {:ok, a}
  end
  
  defp inner do
    try do
      throw(42)
    catch 42 -> {:ok, :erlang.get_stacktrace}
    end
  end
end

Stack_traces.main