Module: OboeMethodProfiling::ClassMethods

Defined in:
lib/oboe/method_profiling.rb

Instance Method Summary collapse

Instance Method Details

#profile_method(method_name, profile_name, store_args = false, store_return = false, *_) ⇒ Object 



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# File 'lib/oboe/method_profiling.rb', line 25

def profile_method(method_name, profile_name, store_args = false, store_return = false, *_)
  begin
    # this only gets file and line where profiling is turned on, presumably
    # right after the function definition. ruby 1.9 and 2.0 has nice introspection (Method.source_location)
    # but its appears no such luck for ruby 1.8
    file = ''
    line = ''
    if RUBY_VERSION >= '1.9'
      info = instance_method(method_name).source_location
      unless info.nil?
        file = info[0].to_s
        line = info[1].to_s
      end
    else
      info = Kernel.caller[0].split(':')
      file = info.first.to_s
      line = info.last.to_s
    end

    # Safety:  Make sure there are no quotes or double quotes to break the class_eval
    file = file.gsub /[\'\"]/, ''
    line = line.gsub /[\'\"]/, ''

    # profiling via ruby-prof, is it possible to get return value of profiled code?
    code = "def _oboe_profiled_#{method_name}(*args, &block)
              entry_kvs                  = {}
              entry_kvs['Language']      = 'ruby'
              entry_kvs['ProfileName']   = '#{Oboe::Util.prettify(profile_name)}'
              entry_kvs['FunctionName']  = '#{Oboe::Util.prettify(method_name)}'
              entry_kvs['File']          = '#{file}'
              entry_kvs['LineNumber']    = '#{line}'
              entry_kvs['Args']          = Oboe::API.pps(*args) if #{store_args}
              entry_kvs.merge!(::Oboe::API.get_class_name(self))

              Oboe::API.log(nil, 'profile_entry', entry_kvs)

              ret = _oboe_orig_#{method_name}(*args, &block)

              exit_kvs =  {}
              exit_kvs['Language'] = 'ruby'
              exit_kvs['ProfileName'] = '#{Oboe::Util.prettify(profile_name)}'
              exit_kvs['ReturnValue'] = Oboe::API.pps(ret) if #{store_return}

              Oboe::API.log(nil, 'profile_exit', exit_kvs)
              ret
            end"
  rescue => e
    Oboe.logger.warn "[oboe/warn] profile_method: #{e.inspect}"
  end

  begin
    class_eval code, __FILE__, __LINE__
    alias_method "_oboe_orig_#{method_name}", method_name
    alias_method method_name, "_oboe_profiled_#{method_name}"
  rescue => e
    Oboe.logger.warn "[oboe/warn] Fatal error profiling method (#{method_name}): #{e.inspect}" if Oboe::Config[:verbose]
  end
end