Tracing method invocations in ruby

ruby_trace

#AMQP.logging = true
#set_trace_func proc { |event, file, line, id, binding, classname|
#  if event == "call" && ((file.include?("lib/amqp") &&
#      !file.include?("lib/amqp/buffer") &&
#      #!file.include?("lib/amqp/frame") &&
#      !file.include?("lib/amqp/spec")) ||
#      file.include?("eventmachine"))
#    printf "from %-130s\t%8s\t%-25s:%-4d\t%s\n", caller[2], event, File.basename(file), line, id
#  end
#}