This simple script uses the line probe to count how many times a line was

executed in a Ruby program. In this example you can see it running on the

Code/Ruby/func_slow.rb program.

# rb_lines.d

Tracing... Hit Ctrl-C to end.

^C

FILE:LINE COUNT

func_slow.rb:3 1

func_slow.rb:4 1

func_slow.rb:5 1

func_slow.rb:6 1

func_slow.rb:12 1

func_slow.rb:13 1

func_slow.rb:14 1

func_slow.rb:15 1

func_slow.rb:19 1

func_slow.rb:22 1

func_slow.rb:23 1

func_slow.rb:24 1

func_slow.rb:25 1

func_slow.rb:29 1

func_slow.rb:32 1

func_slow.rb:26 100000

func_slow.rb:27 100000

func_slow.rb:16 200000

func_slow.rb:17 200000

func_slow.rb:7 300000

func_slow.rb:8 300000