Class: DEBUGGER__

Inherits:
Object
  • Object
show all
Defined in:
lib/debug.rb

Defined Under Namespace

Classes: Context, Mutex

Constant Summary collapse

MUTEX = 
Mutex.new

Class Method Summary collapse

Class Method Details

.break_points ⇒ Object 



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# File 'lib/debug.rb', line 784

def break_points
  @break_points
end

.context(thread = Thread.current) ⇒ Object 



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# File 'lib/debug.rb', line 837

def context(thread=Thread.current)
  c = thread[:__debugger_data__]
  unless c
    thread[:__debugger_data__] = c = Context.new
  end
  c
end

.debug_thread_info(input, binding) ⇒ Object 



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# File 'lib/debug.rb', line 893

def debug_thread_info(input, binding)
  case input
  when /^l(?:ist)?/
    make_thread_list
    thread_list_all

  when /^c(?:ur(?:rent)?)?$/
    make_thread_list
    thread_list(@thread_list[Thread.current])

  when /^(?:sw(?:itch)?\s+)?(\d+)/
    make_thread_list
    th = get_thread($1.to_i)
    if th == Thread.current
	@stdout.print "It's the current thread.\n"
    else
	thread_list(@thread_list[th])
	context(th).stop_next
	th.run
	return :cont
    end

  when /^stop\s+(\d+)/
    make_thread_list
    th = get_thread($1.to_i)
    if th == Thread.current
	@stdout.print "It's the current thread.\n"
    elsif th.stop?
	@stdout.print "Already stopped.\n"
    else
	thread_list(@thread_list[th])
	context(th).suspend 
    end

  when /^resume\s+(\d+)/
    make_thread_list
    th = get_thread($1.to_i)
    if th == Thread.current
	@stdout.print "It's the current thread.\n"
    elsif !th.stop?
	@stdout.print "Already running."
    else
	thread_list(@thread_list[th])
	th.run
    end
  end
end

.display ⇒ Object 



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# File 'lib/debug.rb', line 780

def display
  @display
end

.get_thread(num) ⇒ Object 



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# File 'lib/debug.rb', line 849

def get_thread(num)
  th = @thread_list.index(num)
  unless th
    @stdout.print "No thread ##{num}\n"
    throw :debug_error
  end
  th
end

.interrupt ⇒ Object 



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# File 'lib/debug.rb', line 845

def interrupt
  context(@last_thread).stop_next
end

.make_thread_list ⇒ Object 



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# File 'lib/debug.rb', line 880

def make_thread_list
  hash = {}
  for th in Thread::list
    if @thread_list.key? th
	hash[th] = @thread_list[th]
    else
	@max_thread += 1
	hash[th] = @max_thread
    end
  end
  @thread_list = hash
end

.resume ⇒ Object 



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# File 'lib/debug.rb', line 820

def resume
  saved_crit = Thread.critical
  Thread.critical = true
  make_thread_list
  for th, in @thread_list
    next if th == Thread.current
    context(th).clear_suspend
  end
  waiting.each do |th|
    th.run
  end
  waiting.clear
  Thread.critical = saved_crit
  # Schedule other threads to restart as soon as possible.
  Thread.pass
end

.set_last_thread(th) ⇒ Object 



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# File 'lib/debug.rb', line 803

def set_last_thread(th)
  @last_thread = th
end

.set_trace(arg) ⇒ Object 



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# File 'lib/debug.rb', line 792

def set_trace( arg )
  saved_crit = Thread.critical
  Thread.critical = true
  make_thread_list
  for th, in @thread_list
    context(th).set_trace arg
  end
  Thread.critical = saved_crit
  arg
end

.stdout ⇒ Object 



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# File 'lib/debug.rb', line 772

def stdout
  @stdout
end

.stdout=(s) ⇒ Object 



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# File 'lib/debug.rb', line 776

def stdout=(s)
  @stdout = s
end

.suspend ⇒ Object 



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# File 'lib/debug.rb', line 807

def suspend
  saved_crit = Thread.critical
  Thread.critical = true
  make_thread_list
  for th, in @thread_list
    next if th == Thread.current
    context(th).set_suspend
  end
  Thread.critical = saved_crit
  # Schedule other threads to suspend as soon as possible.
  Thread.pass unless Thread.critical
end

.thread_list(num) ⇒ Object 



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# File 'lib/debug.rb', line 858

def thread_list(num)
  th = get_thread(num)
  if th == Thread.current
    @stdout.print "+"
  else
    @stdout.print " "
  end
  @stdout.printf "%d ", num
  @stdout.print th.inspect, "\t"
  file = context(th).instance_eval{@file}
  if file
    @stdout.print file,":",context(th).instance_eval{@line}
  end
  @stdout.print "\n"
end

.thread_list_all ⇒ Object 



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# File 'lib/debug.rb', line 874

def thread_list_all
  for th in @thread_list.values.sort
    thread_list(th)
  end
end

.waiting ⇒ Object 



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# File 'lib/debug.rb', line 788

def waiting
  @waiting
end