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|
class DEBUGGER__
trap("INT") { DEBUGGER__::CONTEXT.interrupt }
$DEBUG = TRUE
def initialize
@break_points = []
@stop_next = 1
@frames = [nil]
@frame_pos = nil
@last_file = nil
@scripts = {}
end
def interrupt
@stop_next = 1
end
def debug_eval(str, binding)
begin
val = eval(str, binding)
val
rescue
at = caller(0)
printf "%s:%s\n", at.shift, $!
for i in at
break if i =~ /`debug_(eval|command)'$/ #`
printf "\tfrom %s\n", i
end
end
end
def debug_command(file, line, id, binding)
if (ENV['EMACS'] == 't')
printf "\032\032%s:%d:\n", file, line
else
printf "%s:%d:%s", file, line, line_at(file, line)
end
@frames[-1] = binding
STDOUT.print "(rdb:-) "
STDOUT.flush
while input = STDIN.gets
input.chop!
case input
when /^b(reak)?\s+(([^:\n]+:)?.+)/
pos = $2
if pos.index ":"
file, pos = pos.split(":")
end
file = File.basename(file)
if pos =~ /^\d+$/
pname = pos
pos = Integer(pos)
else
pname = pos = pos.intern.id2name
end
printf "Set breakpoint %d at %s:%s\n", @break_points.size, file, pname
@break_points.push [file, pos]
when /^b(reak)?$/, /^info b(reak)?$/
n = 0
for f, p in @break_points
printf "%d %s:%s\n", n, f, p
n += 1
end
when /^del(ete)?(\s+(\d+))?$/
pos = $3
unless pos
STDOUT.print "clear all breakpoints? (y/n) "
STDOUT.flush
input = STDIN.gets.chop!
if input == "y"
for n in @break_points.indexes
@break_points[n] = nil
end
end
else
pos = Integer(pos)
if @break_points[pos]
bp = @break_points[pos]
printf "Clear breakpoint %d at %s:%s\n", pos, bp[0], bp[1]
@break_points[pos] = nil
else
printf "Breakpoint %d is not defined\n", pos
end
end
when /^c(ont)?$/
return
when /^s(tep)?\s*(\d+)?$/
if $1
lev = Integer($1)
else
lev = 1
end
@stop_next = lev
return
when /^n(ext)?\s*(\d+)?$/
if $1
lev = Integer($1)
else
lev = 1
end
@stop_next = lev
@no_step = @frames.size
return
when /^up\s*(\d+)?$/
if $1
lev = Integer($1)
else
lev = 1
end
unless @frame_pos
@frame_pos = @frames.size - 1
end
@frame_pos -= lev
if @frame_pos < 0
STDOUT.print "at toplevel\n"
@frame_pos = 0
else
binding = @frames[@frame_pos]
end
when /^down\s*(\d+)??$/
if $1
lev = Integer($1)
else
lev = 1
end
if lev >= @frames.size or @frame_pos and @frame_pos+lev >= @frames.size
STDOUT.print "at stack bottom\n"
@frame_pos = nil
else
@frame_pos += lev
binding = @frames[@frame_pos]
end
when /^fin(ish)?$/
@finish_pos = @frames.size
return
when /^q(uit)?$/
STDOUT.print "really quit? (y/n) "
STDOUT.flush
input = STDIN.gets.chop!
exit if input == "y"
when /^where$/
at = caller(4)
for i in at
printf " %s\n", i
end
when /^l(ist)?(\s+(.*))?$/
if $3
b, e = $3.split(/[-,]/)
b = Integer(b)-1
if e
e = Integer(e)-1
else
e = b + 10
end
end
unless b
b = line - 1
e = line + 9
end
p [b,e]
line_at(file, line)
if lines = @scripts[file] and lines != TRUE
n = b+1
for l in lines[b..e]
printf "%4d %s", n, l
n += 1
end
else
printf "no sourcefile available for %s\n", file
end
when /^p\s+/
p debug_eval($', binding)
else
v = debug_eval(input, binding)
p v unless v == nil
end
STDOUT.print "(rdb:-) "
STDOUT.flush
end
end
def line_at(file, line)
lines = @scripts[file]
if lines
return "\n" if lines == TRUE
line = lines[line-1]
return "\n" unless line
return line
end
begin
f = open(file)
lines = @scripts[file] = f.readlines
rescue
@scripts[file] = TRUE
return "\n"
end
line = lines[line-1]
return "\n" unless line
return line
end
def debug_funcname(id)
if id == 0
"toplevel"
else
id.id2name
end
end
def check_break_points(file, pos, binding, id)
file = File.basename(file)
if @break_points.include? [file, pos]
index = @break_points.index([file, pos])
printf "Breakpoint %d, %s at %s:%s\n",
index, debug_funcname(id), file, pos
return TRUE
end
return FALSE
end
def trace_func(event, file, line, id, binding)
if event == 'line'
if @no_step == nil or @no_step >= @frames.size
@stop_next -= 1
end
if @stop_next == 0
if [file, line] == @last
@stop_next = 1
else
@no_step = nil
debug_command(file, line, id, binding)
@last = [file, line]
end
end
if check_break_points(file, line, binding, id)
debug_command(file, line, id, binding)
end
end
if event == 'call'
@frames.push binding
if check_break_points(file, id.id2name, binding, id)
debug_command(file, line, id, binding)
end
end
if event == 'class'
@frames.push binding
end
if event == 'return' or event == 'end'
if @finish_pos == @frames.size
@stop_next = 1
end
@frames.pop
end
@last_file = file
end
CONTEXT = new
end
set_trace_func proc{|event, file, line, id, binding|
DEBUGGER__::CONTEXT.trace_func event, file, line, id, binding
}
|
