set_trace_func mess around

setTraceBits

set_trace_func proc { |event, file, line, id, binding, classname|
  # puts "event: #{event} file #{file} line #{line} id #{id} binding #{binding.inspect} classname #{(classname.nil?) ? classname : classname.name}"
  # p binding
  # only interested in events of type 'call' (Ruby method calls)
  # see the docs for set_trace_func for other supported event types
  puts "#{classname} #{id} called" if id == 'method2'
}

class TodoList
  def method1
    puts "in method a"
  end

  def method2
    puts "in method b"
  end
end

b = TodoList.new

c = TodoList.new

b.method2
b.method1