Stack tracing for DragonRuby

drgtk_stack_trace.rb

module Spy
  def self.on! instance
    all_methods = instance.class.instance_methods false
    instance.class.class_eval do
      attr_accessor :__spy_call_depth__ unless instance.class.instance_methods.include?(:__spy_call_depth__)
      all_methods.reject { |m| m.start_with? "__spy_" }.each do |m|
        original_method_name = m
        new_method_name = "__spy_original_#{m}__".to_sym
        alias_method new_method_name, m
        puts "Spying on! #{m}"
        define_method(m) do |*args|
          instance.__spy_call_depth__ ||= 0
          tab_width = " " * (instance.__spy_call_depth__ * 8)
          parameters = "#{args}"[1..-2]
          instance.__spy_call_depth__ += 1
          print "\n  #{tab_width}#{m}(#{parameters})"
          execution_time = Time.new.to_i
          result = send(new_method_name, *args)
          completion_time = Time.new.to_i
          instance.__spy_call_depth__ -= 1
          instance.__spy_call_depth__ = instance.__spy_call_depth__.greater 0
          delta = (completion_time - execution_time)
          if delta > 0
            print "\n#{delta}#{tab_width} success: #{m}"
          else
            print "\n0#{tab_width} success: #{m}"
          end
          puts "" if instance.__spy_call_depth__ == 0
          result
        rescue Exception => e
          instance.__spy_call_depth__ -= 1
          instance.__spy_call_depth__ = instance.__spy_call_depth__.greater 0
          print "\n #{tab_width} failed: #{m}"
          puts "" if instance.__spy_call_depth__ == 0
          raise e
        end
      end
    end
  end
end

def test_game args, assert
  game = Game.new
  Spy.on!(game)
  game._defaults args
  game._init args
  game._update args
end

$gtk.suppress_framerate_warning = true
$gtk.tests.start

This was posted in LOWREZ DragonRiders Discord on Aug 1, 2019 by @amirrajan

This is now part of DragonRuby GTK proper. Source code is here: https://github.com/DragonRuby/Game-Toolkit-Symbol-Lookup/blob/master/trace.rb

Cool. I was just making note for the newsletter, as you can't link to posts in Discord (D'Oh!)