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- # pdb.py -- finally, a Python debugger!
-
- # (See pdb.doc for documentation.)
-
- import string
- import sys
- import linecache
- import cmd
- import bdb
- import repr
-
-
- class Pdb(bdb.Bdb, cmd.Cmd):
-
- def __init__(self):
- bdb.Bdb.__init__(self)
- cmd.Cmd.__init__(self)
- self.prompt = '(Pdb) '
-
- def reset(self):
- bdb.Bdb.reset(self)
- self.forget()
-
- def forget(self):
- self.lineno = None
- self.stack = []
- self.curindex = 0
- self.curframe = None
-
- def setup(self, f, t):
- self.forget()
- self.stack, self.curindex = self.get_stack(f, t)
- self.curframe = self.stack[self.curindex][0]
-
- # Override Bdb methods (except user_call, for now)
-
- def user_line(self, frame):
- # This function is called when we stop or break at this line
- self.interaction(frame, None)
-
- def user_return(self, frame, return_value):
- # This function is called when a return trap is set here
- frame.f_locals['__return__'] = return_value
- print '--Return--'
- self.interaction(frame, None)
-
- def user_exception(self, frame, (exc_type, exc_value, exc_traceback)):
- # This function is called if an exception occurs,
- # but only if we are to stop at or just below this level
- frame.f_locals['__exception__'] = exc_type, exc_value
- print exc_type + ':', repr.repr(exc_value)
- self.interaction(frame, exc_traceback)
-
- # General interaction function
-
- def interaction(self, frame, traceback):
- self.setup(frame, traceback)
- self.print_stack_entry(self.stack[self.curindex])
- self.cmdloop()
- self.forget()
-
- def default(self, line):
- if line[:1] == '!': line = line[1:]
- locals = self.curframe.f_locals
- globals = self.curframe.f_globals
- globals['__privileged__'] = 1
- try:
- exec(line + '\n', globals, locals)
- except:
- print '***', sys.exc_type + ':', sys.exc_value
-
- # Command definitions, called by cmdloop()
- # The argument is the remaining string on the command line
- # Return true to exit from the command loop
-
- do_h = cmd.Cmd.do_help
-
- def do_break(self, arg):
- if not arg:
- print self.get_all_breaks() # XXX
- return
- try:
- lineno = int(eval(arg))
- except:
- print '*** Error in argument:', `arg`
- return
- filename = self.curframe.f_code.co_filename
- err = self.set_break(filename, lineno)
- if err: print '***', err
- do_b = do_break
-
- def do_clear(self, arg):
- if not arg:
- try:
- reply = raw_input('Clear all breaks? ')
- except EOFError:
- reply = 'no'
- reply = string.lower(string.strip(reply))
- if reply in ('y', 'yes'):
- self.clear_all_breaks()
- return
- try:
- lineno = int(eval(arg))
- except:
- print '*** Error in argument:', `arg`
- return
- filename = self.curframe.f_code.co_filename
- err = self.clear_break(filename, lineno)
- if err: print '***', err
- do_cl = do_clear # 'c' is already an abbreviation for 'continue'
-
- def do_where(self, arg):
- self.print_stack_trace()
- do_w = do_where
-
- def do_up(self, arg):
- if self.curindex == 0:
- print '*** Oldest frame'
- else:
- self.curindex = self.curindex - 1
- self.curframe = self.stack[self.curindex][0]
- self.print_stack_entry(self.stack[self.curindex])
- self.lineno = None
- do_u = do_up
-
- def do_down(self, arg):
- if self.curindex + 1 == len(self.stack):
- print '*** Newest frame'
- else:
- self.curindex = self.curindex + 1
- self.curframe = self.stack[self.curindex][0]
- self.print_stack_entry(self.stack[self.curindex])
- self.lineno = None
- do_d = do_down
-
- def do_step(self, arg):
- self.set_step()
- return 1
- do_s = do_step
-
- def do_next(self, arg):
- self.set_next(self.curframe)
- return 1
- do_n = do_next
-
- def do_return(self, arg):
- self.set_return(self.curframe)
- return 1
- do_r = do_return
-
- def do_continue(self, arg):
- self.set_continue()
- return 1
- do_c = do_cont = do_continue
-
- def do_quit(self, arg):
- self.set_quit()
- return 1
- do_q = do_quit
-
- def do_args(self, arg):
- if self.curframe.f_locals.has_key('__return__'):
- print `self.curframe.f_locals['__return__']`
- else:
- print '*** Not arguments?!'
- do_a = do_args
-
- def do_retval(self, arg):
- if self.curframe.f_locals.has_key('__return__'):
- print self.curframe.f_locals['__return__']
- else:
- print '*** Not yet returned!'
- do_rv = do_retval
-
- def do_p(self, arg):
- self.curframe.f_globals['__privileged__'] = 1
- try:
- value = eval(arg, self.curframe.f_globals, \
- self.curframe.f_locals)
- except:
- print '***', sys.exc_type + ':', `sys.exc_value`
- return
-
- print `value`
-
- def do_list(self, arg):
- self.lastcmd = 'list'
- last = None
- if arg:
- try:
- x = eval(arg, {}, {})
- if type(x) == type(()):
- first, last = x
- first = int(first)
- last = int(last)
- if last < first:
- # Assume it's a count
- last = first + last
- else:
- first = max(1, int(x) - 5)
- except:
- print '*** Error in argument:', `arg`
- return
- elif self.lineno is None:
- first = max(1, self.curframe.f_lineno - 5)
- else:
- first = self.lineno + 1
- if last == None:
- last = first + 10
- filename = self.curframe.f_code.co_filename
- breaklist = self.get_file_breaks(filename)
- try:
- for lineno in range(first, last+1):
- line = linecache.getline(filename, lineno)
- if not line:
- print '[EOF]'
- break
- else:
- s = string.rjust(`lineno`, 3)
- if len(s) < 4: s = s + ' '
- if lineno in breaklist: s = s + 'B'
- else: s = s + ' '
- if lineno == self.curframe.f_lineno:
- s = s + '->'
- print s + '\t' + line,
- self.lineno = lineno
- except KeyboardInterrupt:
- pass
- do_l = do_list
-
- def do_whatis(self, arg):
- import codehack
- try:
- value = eval(arg, self.curframe.f_globals, \
- self.curframe.f_locals)
- except:
- print '***', sys.exc_type + ':', `sys.exc_value`
- return
- code = None
- # Is it a function?
- try: code = value.func_code
- except: pass
- if code:
- print 'Function', codehack.getcodename(code)
- return
- # Is it an instance method?
- try: code = value.im_func.func_code
- except: pass
- if code:
- print 'Method', codehack.getcodename(code)
- return
- # None of the above...
- print type(value)
-
- # Print a traceback starting at the top stack frame.
- # The most recently entered frame is printed last;
- # this is different from dbx and gdb, but consistent with
- # the Python interpreter's stack trace.
- # It is also consistent with the up/down commands (which are
- # compatible with dbx and gdb: up moves towards 'main()'
- # and down moves towards the most recent stack frame).
-
- def print_stack_trace(self):
- try:
- for frame_lineno in self.stack:
- self.print_stack_entry(frame_lineno)
- except KeyboardInterrupt:
- pass
-
- def print_stack_entry(self, frame_lineno):
- frame, lineno = frame_lineno
- if frame is self.curframe:
- print '>',
- else:
- print ' ',
- print self.format_stack_entry(frame_lineno)
-
-
- # Simplified interface
-
- def run(statement):
- Pdb().run(statement)
-
- def runctx(statement, globals, locals):
- Pdb().runctx(statement, globals, locals)
-
- def runcall(*args):
- apply(Pdb().runcall, args)
-
-
- # Post-Mortem interface
-
- def post_mortem(t):
- p = Pdb()
- p.reset()
- while t.tb_next <> None: t = t.tb_next
- p.interaction(t.tb_frame, t)
-
- def pm():
- import sys
- post_mortem(sys.last_traceback)
-
-
- # Main program for testing
-
- TESTCMD = 'import x; x.main()'
-
- def test():
- import linecache
- linecache.checkcache()
- run(TESTCMD)
-
- # print help
- def help():
- import os
- for dirname in sys.path:
- fullname = os.path.join(dirname, 'pdb.doc')
- if os.path.exists(fullname):
- sts = os.system('${PAGER-more} '+fullname)
- if sts: print '*** Pager exit status:', sts
- break
- else:
- print 'Sorry, can\'t find the help file "pdb.doc"',
- print 'along the Python search path'
-