Class: Rookout::Services::Tracer

Inherits:
Object
  • Object
show all
Defined in:
lib/rookout/services/tracer.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Tracer

Returns a new instance of Tracer.



6
7
8
9
 
# File 'lib/rookout/services/tracer.rb', line 6

def initialize
  @trace_points = {}
  @augs = {}
end

Instance Method Details

#add_breakpoint_aug(positions, aug) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 
# File 'lib/rookout/services/tracer.rb', line 11

def add_breakpoint_aug positions, aug
  return if @augs.include? aug.id

  aug_trace_points = []
  positions.each do |position|
    trace_point = create_trace_point aug
    begin
      trace_point.enable target: position.method, target_line: position.lineno
    rescue RuntimeError, ArgumentError => e
      trace_point.disable # just to make sure if something was partially added to clear everything
      if e.message.include? "can not enable any hooks"
        raise Exceptions::RookInvalidPositionException.new(aug.filename, position.lineno)
      end
      raise Exceptions::RookSetTracepointFailed.new(position.lineno, e)
    ensure
      # We add and remove a dummy trace point to re-align the tracing mechanism as a result of some bug in adding
      # a breakpoint https://bugs.ruby-lang.org/issues/17302
      begin
        dummy_trace_point = TracePoint.new(:line) {} # Dummy
        dummy_trace_point.enable target: position.method, target_line: position.lineno
        dummy_trace_point.disable
      rescue
        # IGNORE
      end
    end
    aug_trace_points.push trace_point
  end

  @trace_points[aug.id] = aug_trace_points
  @augs[aug.id] = aug
  aug.notify_active
end

#clear_augs ⇒ Object 



58
59
60
61
62
63
64
65
 
# File 'lib/rookout/services/tracer.rb', line 58

def clear_augs
  @augs.each_value do |aug_id|
    remove_aug aug_id
  end

  @trace_points = {}
  @augs = {}
end

#close ⇒ Object 



67
68
69
 
# File 'lib/rookout/services/tracer.rb', line 67

def close
  clear_augs
end

#remove_aug(aug_id) ⇒ Object 



44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/rookout/services/tracer.rb', line 44

def remove_aug aug_id
  aug = @augs[aug_id]
  return if aug.nil?

  aug_trace_points = @trace_points[aug_id]
  unless aug_trace_points.nil?
    aug_trace_points.each(&:disable)
  end

  @augs.delete aug_id
  @trace_points.delete aug_id
  aug.notify_removed
end