Module: OboeMethodProfiling::ClassMethods

Defined in:
lib/oboe_metal.rb

Instance Method Summary collapse

Instance Method Details

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



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# File 'lib/oboe_metal.rb', line 29

def profile_method(method_name, profile_name, store_args=false, store_return=false, profile=false)
    #this only gets file and line where profiling is turned on, presumably
    #right after the function definition. ruby 1.9 has nice introspection (Method.source_location)
    #but its appears no such luck for ruby 1.8
    version = RbConfig::CONFIG['ruby_version']
    file = nil
    line = nil
    if version and version.match(/^1.9/)
        info = self.method(method_name).source_location
        if !info.nil?
          file = info[0]
          line = info[1] 
        end
    else
        info = Kernel.caller[0].split(':')
        file = info.first
        line = info.last
    end

    #profiling via ruby-prof, is it possible to get return value of profiled code?
    code = "def _oboe_profiled_#{method_name}(*args, &block)
                def pps(*args)
                    old_out = $stdout
                    begin
                        s = StringIO.new
                        $stdout = s
                        pp(*args)
                    ensure
                        $stdout = old_out
                    end
                    s.string
                end

                # file and line number are fetched in Context.log
                # because we have access to the correct backtrace there
                entry_kvs = {'Language'     => 'ruby',
                             'ProfileName'  => '#{profile_name}',
                             'FunctionName' => '#{method_name}',
                             'Class'        => self.class.to_s.rpartition('::').last,
                             'Module'       => self.class.to_s.rpartition('::').first,
                             'File'         => '#{file}',
                             'LineNumber'    => '#{line}' 
                            }

                if #{store_args}
                    entry_kvs['Args'] = pps *args
                end

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

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

                exit_kvs =  {'Language'     => 'ruby',
                             'ProfileName'  => '#{profile_name}'
                            }
                
                if #{store_return}
                    exit_kvs['ReturnValue'] = pps ret
                end

                Oboe::Context.log(nil, 'profile_exit', exit_kvs)

                ret
            end"
    class_eval code, __FILE__, __LINE__
    alias_method "_oboe_orig_#{method_name}", method_name
    alias_method method_name, "_oboe_profiled_#{method_name}"
end