home *** CD-ROM | disk | FTP | other *** search
- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.4)
-
- '''Debugger basics'''
- import sys
- import os
- import types
- __all__ = [
- 'BdbQuit',
- 'Bdb',
- 'Breakpoint']
-
- class BdbQuit(Exception):
- '''Exception to give up completely'''
- pass
-
-
- class Bdb:
- '''Generic Python debugger base class.
-
- This class takes care of details of the trace facility;
- a derived class should implement user interaction.
- The standard debugger class (pdb.Pdb) is an example.
- '''
-
- def __init__(self):
- self.breaks = { }
- self.fncache = { }
-
-
- def canonic(self, filename):
- if filename == '<' + filename[1:-1] + '>':
- return filename
-
- canonic = self.fncache.get(filename)
- if not canonic:
- canonic = os.path.abspath(filename)
- canonic = os.path.normcase(canonic)
- self.fncache[filename] = canonic
-
- return canonic
-
-
- def reset(self):
- import linecache
- linecache.checkcache()
- self.botframe = None
- self.stopframe = None
- self.returnframe = None
- self.quitting = 0
-
-
- def trace_dispatch(self, frame, event, arg):
- if self.quitting:
- return None
-
- if event == 'line':
- return self.dispatch_line(frame)
-
- if event == 'call':
- return self.dispatch_call(frame, arg)
-
- if event == 'return':
- return self.dispatch_return(frame, arg)
-
- if event == 'exception':
- return self.dispatch_exception(frame, arg)
-
- if event == 'c_call':
- return self.trace_dispatch
-
- if event == 'c_exception':
- return self.trace_dispatch
-
- if event == 'c_return':
- return self.trace_dispatch
-
- print 'bdb.Bdb.dispatch: unknown debugging event:', repr(event)
- return self.trace_dispatch
-
-
- def dispatch_line(self, frame):
- if self.stop_here(frame) or self.break_here(frame):
- self.user_line(frame)
- if self.quitting:
- raise BdbQuit
-
-
- return self.trace_dispatch
-
-
- def dispatch_call(self, frame, arg):
- if self.botframe is None:
- self.botframe = frame.f_back
- return self.trace_dispatch
-
- if not self.stop_here(frame) or self.break_anywhere(frame):
- return None
-
- self.user_call(frame, arg)
- if self.quitting:
- raise BdbQuit
-
- return self.trace_dispatch
-
-
- def dispatch_return(self, frame, arg):
- if self.stop_here(frame) or frame == self.returnframe:
- self.user_return(frame, arg)
- if self.quitting:
- raise BdbQuit
-
-
- return self.trace_dispatch
-
-
- def dispatch_exception(self, frame, arg):
- if self.stop_here(frame):
- self.user_exception(frame, arg)
- if self.quitting:
- raise BdbQuit
-
-
- return self.trace_dispatch
-
-
- def stop_here(self, frame):
- if frame is self.stopframe:
- return True
-
- while frame is not None and frame is not self.stopframe:
- if frame is self.botframe:
- return True
-
- frame = frame.f_back
- return False
-
-
- def break_here(self, frame):
- filename = self.canonic(frame.f_code.co_filename)
- if filename not in self.breaks:
- return False
-
- lineno = frame.f_lineno
- if lineno not in self.breaks[filename]:
- lineno = frame.f_code.co_firstlineno
- if lineno not in self.breaks[filename]:
- return False
-
-
- (bp, flag) = effective(filename, lineno, frame)
- if bp:
- self.currentbp = bp.number
- if flag and bp.temporary:
- self.do_clear(str(bp.number))
-
- return True
- else:
- return False
-
-
- def do_clear(self, arg):
- raise NotImplementedError, 'subclass of bdb must implement do_clear()'
-
-
- def break_anywhere(self, frame):
- return self.breaks.has_key(self.canonic(frame.f_code.co_filename))
-
-
- def user_call(self, frame, argument_list):
- '''This method is called when there is the remote possibility
- that we ever need to stop in this function.'''
- pass
-
-
- def user_line(self, frame):
- '''This method is called when we stop or break at this line.'''
- pass
-
-
- def user_return(self, frame, return_value):
- '''This method is called when a return trap is set here.'''
- pass
-
-
- def user_exception(self, frame, .4):
- '''This method is called if an exception occurs,
- but only if we are to stop at or just below this level.'''
- (exc_type, exc_value, exc_traceback) = .4
-
-
- def set_step(self):
- '''Stop after one line of code.'''
- self.stopframe = None
- self.returnframe = None
- self.quitting = 0
-
-
- def set_next(self, frame):
- '''Stop on the next line in or below the given frame.'''
- self.stopframe = frame
- self.returnframe = None
- self.quitting = 0
-
-
- def set_return(self, frame):
- '''Stop when returning from the given frame.'''
- self.stopframe = frame.f_back
- self.returnframe = frame
- self.quitting = 0
-
-
- def set_trace(self, frame = None):
- """Start debugging from `frame`.
-
- If frame is not specified, debugging starts from caller's frame.
- """
- if frame is None:
- frame = sys._getframe().f_back
-
- self.reset()
- while frame:
- frame.f_trace = self.trace_dispatch
- self.botframe = frame
- frame = frame.f_back
- self.set_step()
- sys.settrace(self.trace_dispatch)
-
-
- def set_continue(self):
- self.stopframe = self.botframe
- self.returnframe = None
- self.quitting = 0
- if not self.breaks:
- sys.settrace(None)
- frame = sys._getframe().f_back
- while frame and frame is not self.botframe:
- del frame.f_trace
- frame = frame.f_back
-
-
-
- def set_quit(self):
- self.stopframe = self.botframe
- self.returnframe = None
- self.quitting = 1
- sys.settrace(None)
-
-
- def set_break(self, filename, lineno, temporary = 0, cond = None, funcname = None):
- filename = self.canonic(filename)
- import linecache
- line = linecache.getline(filename, lineno)
- if not line:
- return 'Line %s:%d does not exist' % (filename, lineno)
-
- if filename not in self.breaks:
- self.breaks[filename] = []
-
- list = self.breaks[filename]
- if lineno not in list:
- list.append(lineno)
-
- bp = Breakpoint(filename, lineno, temporary, cond, funcname)
-
-
- def clear_break(self, filename, lineno):
- filename = self.canonic(filename)
- if filename not in self.breaks:
- return 'There are no breakpoints in %s' % filename
-
- if lineno not in self.breaks[filename]:
- return 'There is no breakpoint at %s:%d' % (filename, lineno)
-
- for bp in Breakpoint.bplist[(filename, lineno)][:]:
- bp.deleteMe()
-
- if not Breakpoint.bplist.has_key((filename, lineno)):
- self.breaks[filename].remove(lineno)
-
- if not self.breaks[filename]:
- del self.breaks[filename]
-
-
-
- def clear_bpbynumber(self, arg):
-
- try:
- number = int(arg)
- except:
- return 'Non-numeric breakpoint number (%s)' % arg
-
-
- try:
- bp = Breakpoint.bpbynumber[number]
- except IndexError:
- return 'Breakpoint number (%d) out of range' % number
-
- if not bp:
- return 'Breakpoint (%d) already deleted' % number
-
- self.clear_break(bp.file, bp.line)
-
-
- def clear_all_file_breaks(self, filename):
- filename = self.canonic(filename)
- if filename not in self.breaks:
- return 'There are no breakpoints in %s' % filename
-
- for line in self.breaks[filename]:
- blist = Breakpoint.bplist[(filename, line)]
- for bp in blist:
- bp.deleteMe()
-
-
- del self.breaks[filename]
-
-
- def clear_all_breaks(self):
- if not self.breaks:
- return 'There are no breakpoints'
-
- for bp in Breakpoint.bpbynumber:
- if bp:
- bp.deleteMe()
- continue
-
- self.breaks = { }
-
-
- def get_break(self, filename, lineno):
- filename = self.canonic(filename)
- if filename in self.breaks:
- pass
- return lineno in self.breaks[filename]
-
-
- def get_breaks(self, filename, lineno):
- filename = self.canonic(filename)
- if not filename in self.breaks and lineno in self.breaks[filename] or Breakpoint.bplist[(filename, lineno)]:
- pass
- return []
-
-
- def get_file_breaks(self, filename):
- filename = self.canonic(filename)
- if filename in self.breaks:
- return self.breaks[filename]
- else:
- return []
-
-
- def get_all_breaks(self):
- return self.breaks
-
-
- def get_stack(self, f, t):
- stack = []
- if t and t.tb_frame is f:
- t = t.tb_next
-
- while f is not None:
- stack.append((f, f.f_lineno))
- if f is self.botframe:
- break
-
- f = f.f_back
- stack.reverse()
- i = max(0, len(stack) - 1)
- while t is not None:
- stack.append((t.tb_frame, t.tb_lineno))
- t = t.tb_next
- return (stack, i)
-
-
- def format_stack_entry(self, frame_lineno, lprefix = ': '):
- import linecache
- import repr
- (frame, lineno) = frame_lineno
- filename = self.canonic(frame.f_code.co_filename)
- s = '%s(%r)' % (filename, lineno)
- if frame.f_code.co_name:
- s = s + frame.f_code.co_name
- else:
- s = s + '<lambda>'
- if '__args__' in frame.f_locals:
- args = frame.f_locals['__args__']
- else:
- args = None
- if args:
- s = s + repr.repr(args)
- else:
- s = s + '()'
- if '__return__' in frame.f_locals:
- rv = frame.f_locals['__return__']
- s = s + '->'
- s = s + repr.repr(rv)
-
- line = linecache.getline(filename, lineno)
- if line:
- s = s + lprefix + line.strip()
-
- return s
-
-
- def run(self, cmd, globals = None, locals = None):
- if globals is None:
- import __main__
- globals = __main__.__dict__
-
- if locals is None:
- locals = globals
-
- self.reset()
- sys.settrace(self.trace_dispatch)
- if not isinstance(cmd, types.CodeType):
- cmd = cmd + '\n'
-
-
- try:
- exec cmd in globals, locals
- except BdbQuit:
- pass
- finally:
- self.quitting = 1
- sys.settrace(None)
-
-
-
- def runeval(self, expr, globals = None, locals = None):
- if globals is None:
- import __main__
- globals = __main__.__dict__
-
- if locals is None:
- locals = globals
-
- self.reset()
- sys.settrace(self.trace_dispatch)
- if not isinstance(expr, types.CodeType):
- expr = expr + '\n'
-
-
- try:
- return eval(expr, globals, locals)
- except BdbQuit:
- pass
- finally:
- self.quitting = 1
- sys.settrace(None)
-
-
-
- def runctx(self, cmd, globals, locals):
- self.run(cmd, globals, locals)
-
-
- def runcall(self, func, *args, **kwds):
- self.reset()
- sys.settrace(self.trace_dispatch)
- res = None
-
- try:
- res = func(*args, **kwds)
- except BdbQuit:
- pass
- finally:
- self.quitting = 1
- sys.settrace(None)
-
- return res
-
-
-
- def set_trace():
- Bdb().set_trace()
-
-
- class Breakpoint:
- '''Breakpoint class
-
- Implements temporary breakpoints, ignore counts, disabling and
- (re)-enabling, and conditionals.
-
- Breakpoints are indexed by number through bpbynumber and by
- the file,line tuple using bplist. The former points to a
- single instance of class Breakpoint. The latter points to a
- list of such instances since there may be more than one
- breakpoint per line.
-
- '''
- next = 1
- bplist = { }
- bpbynumber = [
- None]
-
- def __init__(self, file, line, temporary = 0, cond = None, funcname = None):
- self.funcname = funcname
- self.func_first_executable_line = None
- self.file = file
- self.line = line
- self.temporary = temporary
- self.cond = cond
- self.enabled = 1
- self.ignore = 0
- self.hits = 0
- self.number = Breakpoint.next
- Breakpoint.next = Breakpoint.next + 1
- self.bpbynumber.append(self)
- if self.bplist.has_key((file, line)):
- self.bplist[(file, line)].append(self)
- else:
- self.bplist[(file, line)] = [
- self]
-
-
- def deleteMe(self):
- index = (self.file, self.line)
- self.bpbynumber[self.number] = None
- self.bplist[index].remove(self)
- if not self.bplist[index]:
- del self.bplist[index]
-
-
-
- def enable(self):
- self.enabled = 1
-
-
- def disable(self):
- self.enabled = 0
-
-
- def bpprint(self):
- if self.temporary:
- disp = 'del '
- else:
- disp = 'keep '
- if self.enabled:
- disp = disp + 'yes'
- else:
- disp = disp + 'no '
- print '%-4dbreakpoint %s at %s:%d' % (self.number, disp, self.file, self.line)
- if self.cond:
- print '\tstop only if %s' % (self.cond,)
-
- if self.ignore:
- print '\tignore next %d hits' % self.ignore
-
- if self.hits:
- if self.hits > 1:
- ss = 's'
- else:
- ss = ''
- print '\tbreakpoint already hit %d time%s' % (self.hits, ss)
-
-
-
-
- def checkfuncname(b, frame):
- '''Check whether we should break here because of `b.funcname`.'''
- if not b.funcname:
- if b.line != frame.f_lineno:
- return False
-
- return True
-
- if frame.f_code.co_name != b.funcname:
- return False
-
- if not b.func_first_executable_line:
- b.func_first_executable_line = frame.f_lineno
-
- if b.func_first_executable_line != frame.f_lineno:
- return False
-
- return True
-
-
- def effective(file, line, frame):
- '''Determine which breakpoint for this file:line is to be acted upon.
-
- Called only if we know there is a bpt at this
- location. Returns breakpoint that was triggered and a flag
- that indicates if it is ok to delete a temporary bp.
-
- '''
- possibles = Breakpoint.bplist[(file, line)]
- for i in range(0, len(possibles)):
- b = possibles[i]
- if b.enabled == 0:
- continue
-
- if not checkfuncname(b, frame):
- continue
-
- b.hits = b.hits + 1
- if not b.cond:
- if b.ignore > 0:
- b.ignore = b.ignore - 1
- continue
- else:
- return (b, 1)
- b.ignore > 0
-
- try:
- val = eval(b.cond, frame.f_globals, frame.f_locals)
- if val:
- if b.ignore > 0:
- b.ignore = b.ignore - 1
- else:
- return (b, 1)
- continue
- return (b, 0)
- continue
-
-
- return (None, None)
-
-
- class Tdb(Bdb):
-
- def user_call(self, frame, args):
- name = frame.f_code.co_name
- if not name:
- name = '???'
-
- print '+++ call', name, args
-
-
- def user_line(self, frame):
- import linecache
- name = frame.f_code.co_name
- if not name:
- name = '???'
-
- fn = self.canonic(frame.f_code.co_filename)
- line = linecache.getline(fn, frame.f_lineno)
- print '+++', fn, frame.f_lineno, name, ':', line.strip()
-
-
- def user_return(self, frame, retval):
- print '+++ return', retval
-
-
- def user_exception(self, frame, exc_stuff):
- print '+++ exception', exc_stuff
- self.set_continue()
-
-
-
- def foo(n):
- print 'foo(', n, ')'
- x = bar(n * 10)
- print 'bar returned', x
-
-
- def bar(a):
- print 'bar(', a, ')'
- return a / 2
-
-
- def test():
- t = Tdb()
- t.run('import bdb; bdb.foo(10)')
-
-