class Tracer

display C-routine calls in trace output (defaults to false)

display C-routine calls in trace output (defaults to false)

display process id in trace output (defaults to false)

display process id in trace output (defaults to false)

display thread id in trace output (defaults to true)

display thread id in trace output (defaults to true)

output stream used to output trace (defaults to STDOUT)

mutex lock used by tracer for displaying trace output

display additional debug information (defaults to false)

display additional debug information (defaults to false)

Used to filter unwanted trace output

Example which only outputs lines of code executed within the Kernel class:

Tracer.add_filter do |event, file, line, id, binding, klass, *rest|
  "Kernel" == klass.to_s
end

# File rake/lib/tracer.rb, line 275
def Tracer.add_filter(p = proc)
  Single.add_filter(p)
end

Disable tracing

# File rake/lib/tracer.rb, line 248
def Tracer.off
  Single.off
end

Start tracing

Example¶ ↑

Tracer.on
# code to trace here
Tracer.off

You can also pass a block:

Tracer.on {
  # trace everything in this block
}

# File rake/lib/tracer.rb, line 237
def Tracer.on
  if block_given?
    Single.on{yield}
  else
    Single.on
  end
end

Register an event handler p which is called everytime a line in file_name is executed.

Example:

Tracer.set_get_line_procs("example.rb", lambda { |line|
  puts "line number executed is #{line}"
})

# File rake/lib/tracer.rb, line 262
def Tracer.set_get_line_procs(file_name, p = proc)
  Single.set_get_line_procs(file_name, p)
end