A try a writing a simple ruby debugger detailed here http://akash.im/2012/05/12/home-made-debugger-in-ruby.html

Handful collection of fnuctions and classes that helps debug you app. It's my personal gem. If you're a put debugger like me you're going to like it.

Lita plugin debugger

LineCache is a module for reading and caching lines. This may be useful for example in a debugger where the same lines are shown many times. This version works only with a Ruby 2.0 or greater.

The Ruby Regex Debugger. Put your regex in the top pane, and your match text in the bottom pane. Kang will highlight the match text that matches and show you any match groups you have created down the right hand side.

Quick Ruby debugger. Easily print any object or string to the console and to your logs while you're working.

Stop in a C debugger when a Ruby method is called

Uses Pry (http://rdoc.info/github/banister/pry/master/file/README.markdown) as a debugger and introspection tool.

Load pry with the correct debugger.

A cross-version compatible shortcut for invoking a Ruby debugger that will run properly under the currently executing environment.

Proof of concept debugger in plain Ruby

pry-suite is designed to set up a nice Pry ecosystem out of the box. You are given Pry with access to a suite of great plugins. This list is currently comprised of pry-byebug (or pry-debugger for Ruby 1.9.x), pry-doc, pry-docmore, pry-git, pry-highlight, pry-macro, pry-pretty-numeric, pry-rescue ...

Prints the last parameters line from your log file giving the action

Better rails debugger can analyze memory issues only by the moment, but performance is planned.

Tool to print out data encapsulated in hashtags to the server logs.

Remote Debugging for Phusion Passenger

Wraps rendered templates with html comments showing the template path. Also throws in some meta tags which are easier to copy/paste in devtools. To use, call `RailsTemplateDebugger.debug_templates`, e.g. in config/environments/development.rb

Poor man's debugger heavily inspired by PySnooper

A set of convenience utils and debuggers for Ruby.

The Multimodal Interaction Framwork debugger enables model inspection at system runtime.