702 lines
14 KiB
Ruby
702 lines
14 KiB
Ruby
if $SAFE > 0
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STDERR.print "-r debug.rb is not available in safe mode\n"
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exit 1
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end
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SCRIPT_LINES__ = {} unless defined? SCRIPT_LINES__
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class DEBUGGER__
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class Mutex
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def initialize
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@locker = nil
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@waiting = []
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@locked = false;
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end
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def locked?
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@locked
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end
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def lock
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return if @locker == Thread.current
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while (Thread.critical = true; @locked)
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@waiting.push Thread.current
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Thread.stop
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end
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@locked = true
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@locker = Thread.current
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Thread.critical = false
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self
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end
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def unlock
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return unless @locked
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unless @locker == Thread.current
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raise RuntimeError, "unlocked by other"
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end
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Thread.critical = true
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t = @waiting.shift
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@locked = false
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@locker = nil
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Thread.critical = false
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t.run if t
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self
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end
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end
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MUTEX = Mutex.new
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class Context
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DEBUG_LAST_CMD = []
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begin
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require 'readline'
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def readline(prompt, hist)
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Readline::readline(prompt, hist)
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end
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rescue LoadError
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def readline(prompt, hist)
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STDOUT.print prompt
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STDOUT.flush
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line = STDIN.gets
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exit unless line
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line.chomp!
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line
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end
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USE_READLINE = false
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end
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def initialize
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if Thread.current == Thread.main
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@stop_next = 1
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else
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@stop_next = 0
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end
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@last_file = nil
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@last = [nil, nil]
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@file = nil
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@line = nil
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@no_step = nil
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@frames = []
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@finish_pos = 0
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end
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def stop_next(n=1)
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@stop_next = n
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end
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def stdout
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DEBUGGER__.stdout
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end
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def break_points
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DEBUGGER__.break_points
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end
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def display
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DEBUGGER__.display
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end
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def debug_eval(str, binding)
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begin
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val = eval(str, binding)
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val
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rescue StandardError, ScriptError
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at = eval("caller(0)", binding)
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stdout.printf "%s:%s\n", at.shift, $!.to_s.sub(/\(eval\):1:(in `.*?':)?/, '') #`
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for i in at
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stdout.printf "\tfrom %s\n", i
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end
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throw :debug_error
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end
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end
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def var_list(ary, binding)
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ary.sort!
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if false # ary.size < 0
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f = open("|less", "w")
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for v in ary
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f.printf " %s => %s\n", v, eval(v, binding).inspect
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end
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f.close
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else
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for v in ary
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stdout.printf " %s => %s\n", v, eval(v, binding).inspect
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end
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end
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end
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def debug_variable_info(input, binding)
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case input
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when /^\s*g(?:lobal)?$/
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var_list(global_variables, binding)
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when /^\s*l(?:ocal)?$/
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var_list(eval("local_variables", binding), binding)
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when /^\s*i(?:nstance)?\s+/
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obj = debug_eval($', binding)
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var_list(obj.instance_variables, binding)
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when /^\s*c(?:onst(?:ant)?)?\s+/
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obj = debug_eval($', binding)
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unless obj.kind_of? Module
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stdout.print "should be Class/Module: ", $', "\n"
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else
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var_list(obj.constants, obj.module_eval{binding()})
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end
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end
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end
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def debug_method_info(input, binding)
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case input
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when /^i(:?nstance)?\s+/
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obj = debug_eval($', binding)
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len = 0
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for v in obj.methods.sort
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len += v.size + 1
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if len > 70
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len = v.size + 1
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stdout.print "\n"
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end
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stdout.print v, " "
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end
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stdout.print "\n"
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else
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obj = debug_eval(input, binding)
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unless obj.kind_of? Module
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stdout.print "should be Class/Module: ", input, "\n"
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else
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len = 0
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for v in obj.instance_methods.sort
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len += v.size + 1
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if len > 70
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len = v.size + 1
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stdout.print "\n"
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end
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stdout.print v, " "
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end
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stdout.print "\n"
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end
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end
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end
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def thnum
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num = DEBUGGER__.instance_eval{@thread_list[Thread.current]}
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unless num
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DEBUGGER__.make_thread_list
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num = DEBUGGER__.instance_eval{@thread_list[Thread.current]}
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end
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num
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end
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def debug_command(file, line, id, binding)
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MUTEX.lock
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DEBUGGER__.set_last_thread(Thread.current)
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frame_pos = 0
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binding_file = file
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binding_line = line
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previous_line = nil
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if (ENV['EMACS'] == 't')
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stdout.printf "\032\032%s:%d:\n", binding_file, binding_line
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else
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stdout.printf "%s:%d:%s", binding_file, binding_line,
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line_at(binding_file, binding_line)
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end
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@frames[0] = [binding, file, line, id]
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display_expressions(binding)
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while input = readline("(rdb:%d) "%thnum(), true)
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catch (:debug_error) do
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if input == ""
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input = DEBUG_LAST_CMD[0]
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stdout.print input, "\n"
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else
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DEBUG_LAST_CMD[0] = input
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end
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case input
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when /^\s*b(?:reak)?\s+((?:.*?+:)?.+)$/
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pos = $1
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if pos.index(":")
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file, pos = pos.split(":")
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end
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file = File.basename(file)
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if pos =~ /^\d+$/
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pname = pos
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pos = pos.to_i
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else
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pname = pos = pos.intern.id2name
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end
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break_points.push [true, 0, file, pos]
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stdout.printf "Set breakpoint %d at %s:%s\n", break_points.size, file,
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pname
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when /^\s*wat(?:ch)?\s+(.+)$/
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exp = $1
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break_points.push [true, 1, exp]
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stdout.printf "Set watchpoint %d\n", break_points.size, exp
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when /^\s*b(?:reak)?$/
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if break_points.find{|b| b[1] == 0}
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n = 1
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stdout.print "breakpoints:\n"
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for b in break_points
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if b[0] and b[1] == 0
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stdout.printf " %d %s:%s\n", n, b[2], b[3]
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end
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n += 1
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end
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end
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if break_points.find{|b| b[1] == 1}
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n = 1
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stdout.print "\n"
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stdout.print "watchpoints:\n"
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for b in break_points
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if b[0] and b[1] == 1
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stdout.printf " %d %s\n", n, b[2]
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end
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n += 1
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end
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end
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if break_points.size == 0
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stdout.print "no breakpoints\n"
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else
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stdout.print "\n"
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end
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when /^\s*del(?:ete)?(?:\s+(\d+))?$/
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pos = $1
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unless pos
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input = readline("clear all breakpoints? (y/n) ", false)
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if input == "y"
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for b in break_points
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b[0] = false
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end
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end
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else
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pos = pos.to_i
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if break_points[pos-1]
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break_points[pos-1][0] = false
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else
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stdout.printf "Breakpoint %d is not defined\n", pos
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end
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end
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when /^\s*disp(?:lay)?\s+(.+)$/
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exp = $1
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display.push.push [true, exp]
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stdout.printf " %d: %s = %s\n", display.size, exp,
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eval(exp, binding) rescue "--"
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when /^\s*disp(?:lay)?$/
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display_expressions(binding)
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when /^\s*undisp(?:lay)?(?:\s+(\d+))?$/
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pos = $1
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unless pos
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input = readline("clear all expressions? (y/n) ", false)
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if input == "y"
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for d in display
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d[0] = false
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end
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end
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else
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pos = pos.to_i
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if display[pos-1]
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display[pos-1][0] = false
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else
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stdout.printf "display expression %d is not defined\n", pos
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end
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end
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when /^\s*c(?:ont)?$/
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MUTEX.unlock
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return
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when /^\s*s(?:tep)?(?:\s+(\d+))?$/
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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@stop_next = lev
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return
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when /^\s*n(?:ext)?(?:\s+(\d+))?$/
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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@stop_next = lev
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@no_step = @frames.size - frame_pos
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return
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when /^\s*w(?:here)?$/, /^\s*f(?:rame)?$/
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display_frames(frame_pos)
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when /^\s*l(?:ist)?(?:\s+(.+))?$/
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if not $1
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b = previous_line ? previous_line + 10 : binding_line - 5
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e = b + 9
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elsif $1 == '-'
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b = previous_line ? previous_line - 10 : binding_line - 5
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e = b + 9
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else
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b, e = $1.split(/[-,]/)
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if e
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b = b.to_i
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e = e.to_i
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else
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b = b.to_i - 5
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e = b + 9
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end
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end
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previous_line = b
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display_list(b, e, binding_file, binding_line)
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when /^\s*up(?:\s+(\d+))?$/
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previous_line = nil
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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frame_pos += lev
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if frame_pos >= @frames.size
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frame_pos = @frames.size - 1
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stdout.print "at toplevel\n"
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end
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binding, binding_file, binding_line = @frames[frame_pos]
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stdout.printf "#%d %s:%s\n", frame_pos, binding_file, binding_line
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when /^\s*down(?:\s+(\d+))?$/
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previous_line = nil
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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frame_pos -= lev
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if frame_pos < 0
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frame_pos = 0
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stdout.print "at stack bottom\n"
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end
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binding, binding_file, binding_line = @frames[frame_pos]
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stdout.printf "#%d %s:%s\n", frame_pos, binding_file, binding_line
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when /^\s*fin(?:ish)?$/
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if frame_pos == @frames.size
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stdout.print "\"finish\" not meaningful in the outermost frame.\n"
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else
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@finish_pos = @frames.size - frame_pos
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p @finish_pos
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frame_pos = 0
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return
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end
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when /^\s*q(?:uit)?$/
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input = readline("really quit? (y/n) ", false)
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exit if input == "y"
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when /^\s*v(?:ar)?\s+/
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debug_variable_info($', binding)
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when /^\s*m(?:ethod)?\s+/
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debug_method_info($', binding)
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when /^\s*th(?:read)?\s+/
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if DEBUGGER__.debug_thread_info($', binding) == :cont
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MUTEX.unlock
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return
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end
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when /^\s*p\s+/
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p debug_eval($', binding)
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else
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v = debug_eval(input, binding)
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p v unless (v == nil)
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end
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end
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end
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end
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def display_expressions(binding)
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n = 1
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for d in display
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if d[0]
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stdout.printf "%d: %s = %s\n", n, d[1], debug_eval(d[1], binding).to_s
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end
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n += 1
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end
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end
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def frame_set_pos(file, line)
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if @frames[0]
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@frames[0][1] = file
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@frames[0][2] = line
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end
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end
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def display_frames(pos)
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pos += 1
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n = 0
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at = @frames
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for bind, file, line, id in at
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n += 1
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break unless bind
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if pos == n
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stdout.printf "--> #%d %s:%s%s\n", n, file, line, id ? ":in `#{id.id2name}'":""
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else
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stdout.printf " #%d %s:%s%s\n", n, file, line, id ? ":in `#{id.id2name}'":""
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end
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end
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end
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def display_list(b, e, file, line)
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stdout.printf "[%d, %d] in %s\n", b, e, file
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if lines = SCRIPT_LINES__[file] and lines != true
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n = 0
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b.upto(e) do |n|
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if n > 0 && lines[n-1]
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if n == line
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stdout.printf "=> %d %s\n", n, lines[n-1].chomp
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else
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stdout.printf " %d %s\n", n, lines[n-1].chomp
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end
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end
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end
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else
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stdout.printf "no sourcefile available for %s\n", file
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end
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end
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def line_at(file, line)
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lines = SCRIPT_LINES__[file]
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if lines
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return "\n" if lines == true
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line = lines[line-1]
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return "\n" unless line
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return line
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end
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return "\n"
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end
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def debug_funcname(id)
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if id == 0
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"toplevel"
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else
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id.id2name
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end
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end
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def check_break_points(file, pos, binding, id)
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file = File.basename(file)
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n = 1
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for b in break_points
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if b[0]
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if b[1] == 0 and b[2] == file and b[3] == pos
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MUTEX.lock
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stdout.printf "breakpoint %d, %s at %s:%s\n", n, debug_funcname(id), file, pos
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return true
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elsif b[1] == 1 and debug_eval(b[2], binding)
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MUTEX.lock
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stdout.printf "watchpoint %d, %s at %s:%s\n", n, debug_funcname(id), file, pos
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return true
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end
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end
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n += 1
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end
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return false
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end
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def excn_handle(file, line, id, binding)
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if $!.type <= SystemExit
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set_trace_func nil
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exit
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end
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MUTEX.lock
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fs = @frames.size
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tb = caller(0)[-fs..-1]
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stdout.printf "%s\n", $!
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if tb
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for i in tb
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stdout.printf "\tfrom %s\n", i
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end
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end
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debug_command(file, line, id, binding)
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end
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def trace_func(event, file, line, id, binding, klass)
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@file = file
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@line = line
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case event
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when 'line'
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frame_set_pos(file, line)
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if !@no_step or @frames.size == @no_step
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@stop_next -= 1
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elsif @frames.size < @no_step
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@stop_next = 0 # break here before leaving...
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else
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# nothing to do. skipped.
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end
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if @stop_next == 0 or check_break_points(file, line, binding, id)
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if [file, line] == @last
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@stop_next = 1
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else
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@no_step = nil
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debug_command(file, line, id, binding)
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@last = [file, line]
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end
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end
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when 'call'
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@frames.unshift [binding, file, line, id]
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if check_break_points(file, id.id2name, binding, id) or
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check_break_points(klass.to_s, id.id2name, binding, id)
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debug_command(file, line, id, binding)
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end
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when 'c-call'
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frame_set_pos(file, line)
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when 'class'
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@frames.unshift [binding, file, line, id]
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when 'return', 'end'
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if @frames.size == @finish_pos
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@stop_next = 1
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end
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@frames.shift
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when 'end'
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@frames.shift
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when 'raise'
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excn_handle(file, line, id, binding)
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end
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@last_file = file
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end
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end
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trap("INT") { DEBUGGER__.interrupt }
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# $DEBUG = true
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@last_thread = Thread::main
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@max_thread = 1
|
|
@thread_list = {Thread::main => 1}
|
|
@break_points = []
|
|
@display = []
|
|
@stdout = STDOUT
|
|
|
|
class <<DEBUGGER__
|
|
def stdout
|
|
@stdout
|
|
end
|
|
def stdout=(s)
|
|
@stdout = s
|
|
end
|
|
|
|
def display
|
|
@display
|
|
end
|
|
|
|
def break_points
|
|
@break_points
|
|
end
|
|
|
|
def set_last_thread(th)
|
|
@last_thread = th
|
|
end
|
|
|
|
def context(thread=Thread.current)
|
|
c = thread[:__debugger_data__]
|
|
unless c
|
|
thread[:__debugger_data__] = c = Context.new
|
|
end
|
|
c
|
|
end
|
|
|
|
def interrupt
|
|
context(@last_thread).stop_next
|
|
end
|
|
|
|
def get_thread(num)
|
|
th = @thread_list.index(num)
|
|
unless th
|
|
@stdout.print "no thread no.", num, "\n"
|
|
throw :debug_error
|
|
end
|
|
th
|
|
end
|
|
|
|
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
|
|
|
|
def thread_list_all
|
|
for th in @thread_list.values.sort
|
|
thread_list(th)
|
|
end
|
|
end
|
|
|
|
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
|
|
|
|
def debug_thread_info(input, binding)
|
|
case input
|
|
when /^l(?:ist)?/
|
|
make_thread_list
|
|
thread_list_all
|
|
|
|
when /^c(?:ur(?:rent)?)?\s+(\d+)/, /^stop\s+(\d+)/, /^(\d+)/
|
|
make_thread_list
|
|
th = get_thread($1.to_i)
|
|
thread_list(@thread_list[th])
|
|
context(th).stop_next
|
|
th.run
|
|
return :cont
|
|
|
|
when /^c(?:ur(?:rent)?)?$/
|
|
make_thread_list
|
|
thread_list(@thread_list[Thread.current])
|
|
|
|
when /^resume\s+(\d+)/
|
|
make_thread_list
|
|
th = get_thread($1.to_i)
|
|
thread_list(@thread_list[th])
|
|
th.run
|
|
return :cont
|
|
end
|
|
end
|
|
end
|
|
|
|
@stdout.printf "Debug.rb\n"
|
|
@stdout.printf "Emacs support available.\n\n"
|
|
set_trace_func proc{|event, file, line, id, binding,klass,*rest|
|
|
DEBUGGER__.context.trace_func event, file, line, id, binding,klass
|
|
}
|
|
end
|