mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
04c7225b78
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@561 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
399 lines
8.6 KiB
Ruby
399 lines
8.6 KiB
Ruby
LINES__ = {} unless defined? LINES__
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class DEBUGGER__
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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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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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trap("INT") { DEBUGGER__::CONTEXT.interrupt }
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$DEBUG = true
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def initialize
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@break_points = []
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@display = []
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@stop_next = 1
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@frames = [nil]
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@last_file = nil
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@last = [nil, nil]
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@no_step = nil
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@finish_pos = 0
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end
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DEBUG_LAST_CMD = []
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def interrupt
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@stop_next = 1
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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
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at = caller(0)
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STDOUT.printf "%s:%s\n", at.shift, $!
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for i in at
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break if i =~ /`debug_(eval|command)'$/ #`
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STDOUT.printf "\tfrom %s\n", i
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end
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end
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end
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def debug_command(file, line, id, binding)
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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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previus_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
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display_expressions(binding)
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while input = readline("(rdb:-) ", true)
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if input == ""
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input = DEBUG_LAST_CMD[0]
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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 /^b(?:reak)?\s+((?:[^:\n]+:)?.+)$/
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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 /^wat(?:ch)?\s+(.+)$/
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exp = $1
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@break_points.push [true, 1, exp]
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STDOUT.printf "Set watchpoint %d\n", @break_points.size, exp
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when /^b(?:reak)?$/, /^info b(?:reak)?$/
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n = 1
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STDOUT.print "breakpoints:\n"
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for b in @break_points
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if b[0] and (b[1] == 0)
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STDOUT.printf " %d %s:%s\n", n, b[2], b[3]
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end
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n += 1
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end
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n = 1
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STDOUT.print "\n"
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STDOUT.print "watchpoints:\n"
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for b in @break_points
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if b[0] and (b[1] == 1)
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STDOUT.printf " %d %s\n", n, b[2]
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end
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n += 1
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end
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STDOUT.print "\n"
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when /^del(?:ete)?(?:\s+(\d+))?$/
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pos = $1
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unless pos
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input = readline("clear all breakpoints? (y/n) ", false)
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if input == "y"
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for b in @break_points
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b[0] = false
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end
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end
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else
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pos = pos.to_i
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if @break_points[pos-1]
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@break_points[pos-1][0] = false
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else
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STDOUT.printf "Breakpoint %d is not defined\n", pos
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end
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end
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when /^disp(?:lay)?\s+(.+)$/
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exp = $1
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@display.push.push [true, exp]
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STDOUT.printf " %d: %s = %s\n", @display.size, exp,
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debug_eval(exp, binding).to_s
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when /^disp(?:lay)?$/, /^info disp(?:lay)?$/
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display_expressions(binding)
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when /^undisp(?:lay)?(?:\s+(\d+))?$/
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pos = $1
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unless pos
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input = readline("clear all expressions? (y/n) ", false)
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if input == "y"
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for d in @display
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d[0] = false
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end
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end
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else
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pos = pos.to_i
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if @display[pos-1]
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@display[pos-1][0] = false
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else
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STDOUT.printf "display expression %d is not defined\n", pos
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end
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end
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when /^c(?:ont)?$/
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return
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when /^s(?:tep)?(?:\s+(\d+))?$/
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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@stop_next = lev
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return
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when /^n(?:ext)?(?:\s+(\d+))?$/
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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@stop_next = lev
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@no_step = @frames.size - frame_pos
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return
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when /^w(?:here)?$/, /^f(?:rame)?$/
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at = caller(0)
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0.upto(@frames.size - 1) do |n|
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if frame_pos == n
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STDOUT.printf "--> #%d %s\n", n, at[-(@frames.size - n)]
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else
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STDOUT.printf " #%d %s\n", n, at[-(@frames.size - n)]
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end
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end
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when /^l(?:ist)?(?:\s+(.+))?$/
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if not $1
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b = previus_line ? previus_line + 10 : binding_line - 5
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e = b + 9
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elsif $1 == '-'
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b = previus_line ? previus_line - 10 : binding_line - 5
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e = b + 9
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else
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b, e = $1.split(/[-,]/)
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if e
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b = b.to_i
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e = e.to_i
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else
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b = b.to_i - 5
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e = b + 9
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end
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end
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previus_line = b
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STDOUT.printf "[%d, %d] in %s\n", b, e, binding_file
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line_at(binding_file, binding_line)
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if lines = LINES__[binding_file] and lines != true
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n = 0
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b.upto(e) do |n|
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if n > 0 && lines[n-1]
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if n == binding_line
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STDOUT.printf "=> %d %s\n", n, lines[n-1].chomp
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else
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STDOUT.printf " %d %s\n", n, lines[n-1].chomp
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end
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end
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end
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else
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STDOUT.printf "no sourcefile available for %s\n", binding_file
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end
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when /^up(?:\s+(\d+))?$/
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previus_line = nil
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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frame_pos += lev
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if frame_pos >= @frames.size
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frame_pos = @frames.size - 1
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STDOUT.print "at toplevel\n"
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end
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binding = @frames[frame_pos]
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info, binding_file, binding_line = frame_info(frame_pos)
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STDOUT.printf "#%d %s\n", frame_pos, info
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when /^down(?:\s+(\d+))?$/
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previus_line = nil
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if $1
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lev = $1.to_i
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else
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lev = 1
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end
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frame_pos -= lev
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if frame_pos < 0
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frame_pos = 0
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STDOUT.print "at stack bottom\n"
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end
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binding = @frames[frame_pos]
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info, binding_file, binding_line = frame_info(frame_pos)
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STDOUT.printf "#%d %s\n", frame_pos, info
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when /^fi(?:nish)?$/
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if frame_pos == 0
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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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frame_pos = 0
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return
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end
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when /^q(?:uit)?$/
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input = readline("really quit? (y/n) ", false)
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exit if input == "y"
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when /^p\s+/
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p debug_eval($', 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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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_info(pos = 0)
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info = caller(0)[-(@frames.size - pos)]
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info.sub(/:in `.*'$/, "") =~ /^(.*):(\d+)$/ #`
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[info, $1, $2.to_i]
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end
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def line_at(file, line)
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lines = 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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STDOUT.printf "breakpoint %d, %s at %s:%s\n", n, debug_funcname(id),
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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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STDOUT.printf "watchpoint %d, %s at %s:%s\n", n, debug_funcname(id),
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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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fs = @frames.size
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tb = caller(0)[-fs..-1]
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STDOUT.printf "%s\n", $!
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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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debug_command(file, line, id, binding)
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end
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def trace_func(event, file, line, id, binding)
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case event
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when '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
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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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if check_break_points(file, line, binding, id)
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debug_command(file, line, id, binding)
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end
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when 'call'
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@frames.unshift binding
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if check_break_points(file, id.id2name, binding, id)
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debug_command(file, line, id, binding)
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end
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when 'class'
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@frames.unshift binding
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when 'return', 'end'
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@frames.shift
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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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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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CONTEXT = new
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set_trace_func proc{|event, file, line, id, binding,*rest|
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DEBUGGER__::CONTEXT.trace_func event, file, line, id, binding
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}
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end
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