Module: TraceViewMethodProfiling::ClassMethods

Included in:
OboeMethodProfiling::ClassMethods
Defined in:
lib/traceview/method_profiling.rb

Instance Method Summary collapse

Instance Method Details

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



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 
# File 'lib/traceview/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 _traceview_profiled_#{method_name}(*args, &block)
              entry_kvs                  = {}
              entry_kvs['Language']      = 'ruby'
              entry_kvs['ProfileName']   = '#{TraceView::Util.prettify(profile_name)}'
              entry_kvs['FunctionName']  = '#{TraceView::Util.prettify(method_name)}'
              entry_kvs['File']          = '#{file}'
              entry_kvs['LineNumber']    = '#{line}'
              entry_kvs['Args']          = TraceView::API.pps(*args) if #{store_args}
              entry_kvs.merge!(::TraceView::API.get_class_name(self))

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

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

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

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

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