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|
class DEBUGGER__
def max(a,b)
if (a<b); b; else a; end
end
def min(a,b)
if (a<=b); a; else b; end
end
trap("INT") { DEBUGGER__::CONTEXT.interrupt }
$DEBUG = TRUE
def initialize
@break_points = []
@stop_next = 1
@frames = [nil]
@frame_pos = nil # nil means not '0' but `unknown'.
@last_file = nil
@scripts = {}
end
DEBUG_LAST_CMD = []
def interrupt
@stop_next = 1
end
def debug_eval(str, binding)
begin
val = eval(str, binding)
val
rescue
at = caller(0)
STDOUT.printf "%s:%s\n", at.shift, $!
for i in at
break if i =~ /`debug_(eval|command)'$/ #`
STDOUT.printf "\tfrom %s\n", i
end
end
end
def debug_command(file, line, id, binding)
binding_file = file
binding_line = line
debug_line = {}
if (ENV['EMACS'] == 't')
STDOUT.printf "\032\032%s:%d:\n", binding_file, binding_line
else
STDOUT.printf "%s:%d:%s", binding_file, binding_line,
line_at(binding_file, binding_line)
end
@frames[-1] = binding
STDOUT.print "(rdb:-) "
STDOUT.flush
while input = STDIN.gets
input.chop!
if input == ""
input = DEBUG_LAST_CMD[0]
else
DEBUG_LAST_CMD[0] = input
end
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
STDOUT.printf "Set breakpoint %d at %s:%s\n", @break_points.size, file,
pname
@break_points.push [file, pos]
when /^b(reak)?$/
n = 0
for f, p in @break_points
STDOUT.printf "%d %s:%s\n", n, f, p
n += 1
end
when /^del(ete)?(\s+(\d+))?$/
pos = $3
unless pos
STDOUT.print "clear all breakpoints? (y/n) "
STDOUT.flush
input = STDIN.gets.chop!
if input == "y"
for n in @break_points.indexes
@break_points[n] = nil
end
end
else
pos = Integer(pos)
if @break_points[pos]
bp = @break_points[pos]
STDOUT.printf "Clear breakpoint %d at %s:%s\n", pos, bp[0], bp[1]
@break_points[pos] = nil
else
STDOUT.printf "Breakpoint %d is not defined\n", pos
end
end
when /^c(ont)?$/
return
when /^s(tep)?\s*(\d+)?$/
if $2
lev = Integer($2)
else
lev = 1
end
@stop_next = lev
return
when /^n(ext)?\s*(\d+)?$/
if $2
lev = Integer($2)
else
lev = 1
end
@stop_next = lev
@no_step = @frames.size
return
when /^i(?:nfo)?/, /^w(?:here)?/
fs = @frames.size
tb = caller(0)[-fs..-1].reverse
unless @frame_pos; @frame_pos = fs - 1; end
(fs-1).downto(0){ |i|
if (@frame_pos == i)
STDOUT.printf "--> frame %d:%s\n", i, tb[i]
else
STDOUT.printf " frame %d:%s\n", i, tb[i]
end
}
when /^l(ist)?$/
fs = @frames.size
tb = caller(0)[-fs..-1].reverse
unless @frame_pos; @frame_pos = fs - 1; end
file, line, func = tb[@frame_pos].split(":")
line = line.to_i
b = line - 1
e = line + 9
line_at(file, line)
if lines = @scripts[file] and lines != TRUE
lines = [0] + lines # Simple offset adjust
b = max(0, b); e = min(lines.size-1, e)
for l in b..e
if (l == line)
STDOUT.printf "--> %5d %s", l, lines[l]
else
STDOUT.printf " %5d %s", l, lines[l]
end
end
else
STDOUT.printf "no sourcefile available for %s\n", file
end
when /^d(?:own)?\s*(\d+)??$/
if $1; lev = Integer($1); else lev = 1; end
unless @frame_pos; @frame_pos = 0; end
@frame_pos -= lev
if @frame_pos < 0
STDOUT.print "at stack bottom\n"
@frame_pos = 0
else
STDOUT.printf "at level %d\n", @frame_pos
end
binding = @frames[@frame_pos]
when /^u(?:p)?\s*(\d+)?$/
if $1; lev = Integer($1); else lev = 1; end
unless @frame_pos; @frame_pos = @frames.size - 1; end
@frame_pos += lev
p @frame_pos
if @frame_pos >= @frames.size
STDOUT.print "at toplevel\n"
@frame_pos = nil
else
binding = @frames[@frame_pos]
frame_info = caller(4)[-(@frame_pos+1)]
STDOUT.print "at #{frame_info}\n"
frame_info.sub( /:in `.*'$/, '' ) =~ /^(.*):(\d+)$/ #`
binding_file, binding_line = $1, $2.to_i
binding = @frames[@frame_pos]
end
when /^f(inish)?/
@finish_pos = @frames.size
return
when /^q(uit)?$/
STDOUT.print "really quit? (y/n) "
STDOUT.flush
input = STDIN.gets.chop!
exit if input == "y"
when /^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
save = $DEBUG
begin
$DEBUG = FALSE
f = open(file)
lines = @scripts[file] = f.readlines
rescue
$DEBUG = save
@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])
STDOUT.printf "Breakpoint %d, %s at %s:%s\n",
index, debug_funcname(id), file, pos
return TRUE
end
return FALSE
end
def excn_handle(file, line, id, binding)
fs = @frames.size
tb = caller(0)[-fs..-1]
unless @frame_pos; @frame_pos = fs - 1; end
STDOUT.printf "%s\n", $!
for i in tb
STDOUT.printf "\tfrom %s\n", i
end
debug_command(file, line, id, binding)
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
if event == 'raise'
# @frames.push binding
excn_handle(file, line, id, binding)
end
@last_file = file
end
CONTEXT = new
end
set_trace_func proc{|event, file, line, id, binding,*rest|
DEBUGGER__::CONTEXT.trace_func event, file, line, id, binding
}
|