diff options
Diffstat (limited to 'Lib/bdb.py')
| -rw-r--r-- | Lib/bdb.py | 1052 |
1 files changed, 526 insertions, 526 deletions
@@ -1,4 +1,4 @@ -# Debugger basics +"""Debugger basics""" import sys import os @@ -8,551 +8,551 @@ BdbQuit = 'bdb.BdbQuit' # Exception to give up completely 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): - canonic = self.fncache.get(filename) - if not canonic: - canonic = os.path.abspath(filename) - 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) - print 'bdb.Bdb.dispatch: unknown debugging event:', `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): - # XXX 'arg' is no longer used - if self.botframe is None: - # First call of dispatch since reset() - self.botframe = frame - return self.trace_dispatch - if not (self.stop_here(frame) or self.break_anywhere(frame)): - # No need to trace this function - 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 - - 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 - - # Normally derived classes don't override the following - # methods, but they may if they want to redefine the - # definition of stopping and breakpoints. - - def stop_here(self, frame): - if self.stopframe is None: - return 1 - if frame is self.stopframe: - return 1 - while frame is not None and frame is not self.stopframe: - if frame is self.botframe: - return 1 - frame = frame.f_back - return 0 - - def break_here(self, frame): - filename = self.canonic(frame.f_code.co_filename) - if not self.breaks.has_key(filename): - return 0 - lineno = frame.f_lineno - if not lineno in self.breaks[filename]: - return 0 - # flag says ok to delete temp. bp - (bp, flag) = effective(filename, lineno, frame) - if bp: - self.currentbp = bp.number - if (flag and bp.temporary): - self.do_clear(str(bp.number)) - return 1 - else: - return 0 - - def break_anywhere(self, frame): - return self.breaks.has_key( - self.canonic(frame.f_code.co_filename)) - - # Derived classes should override the user_* methods - # to gain control. - - 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, (exc_type, exc_value, exc_traceback)): - # This method is called if an exception occurs, - # but only if we are to stop at or just below this level - pass - - # Derived classes and clients can call the following methods - # to affect the stepping state. - - 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): - # Start debugging from here - try: - 1 + '' - except: - frame = sys.exc_info()[2].tb_frame.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): - # Don't stop except at breakpoints or when finished - self.stopframe = self.botframe - self.returnframe = None - self.quitting = 0 - if not self.breaks: - # no breakpoints; run without debugger overhead - sys.settrace(None) - try: - 1 + '' # raise an exception - except: - frame = sys.exc_info()[2].tb_frame.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) - - # Derived classes and clients can call the following methods - # to manipulate breakpoints. These methods return an - # error message is something went wrong, None if all is well. - # Set_break prints out the breakpoint line and file:lineno. - # Call self.get_*break*() to see the breakpoints or better - # for bp in Breakpoint.bpbynumber: if bp: bp.bpprint(). - - def set_break(self, filename, lineno, temporary=0, cond = None): - filename = self.canonic(filename) - import linecache # Import as late as possible - line = linecache.getline(filename, lineno) - if not line: - return 'Line %s:%d does not exist' % (filename, - lineno) - if not self.breaks.has_key(filename): - self.breaks[filename] = [] - list = self.breaks[filename] - if not lineno in list: - list.append(lineno) - bp = Breakpoint(filename, lineno, temporary, cond) - - def clear_break(self, filename, lineno): - filename = self.canonic(filename) - if not self.breaks.has_key(filename): - 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) - # If there's only one bp in the list for that file,line - # pair, then remove the breaks entry - 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 not self.breaks.has_key(filename): - 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() - self.breaks = {} - - def get_break(self, filename, lineno): - filename = self.canonic(filename) - return self.breaks.has_key(filename) and \ - lineno in self.breaks[filename] - - def get_breaks(self, filename, lineno): - filename = self.canonic(filename) - return self.breaks.has_key(filename) and \ - lineno in self.breaks[filename] and \ - Breakpoint.bplist[filename, lineno] or [] - - def get_file_breaks(self, filename): - filename = self.canonic(filename) - if self.breaks.has_key(filename): - return self.breaks[filename] - else: - return [] - - def get_all_breaks(self): - return self.breaks - - # Derived classes and clients can call the following method - # to get a data structure representing a stack trace. - - 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, repr, string - frame, lineno = frame_lineno - filename = self.canonic(frame.f_code.co_filename) - s = filename + '(' + `lineno` + ')' - if frame.f_code.co_name: - s = s + frame.f_code.co_name - else: - s = s + "<lambda>" - if frame.f_locals.has_key('__args__'): - args = frame.f_locals['__args__'] - else: - args = None - if args: - s = s + repr.repr(args) - else: - s = s + '()' - if frame.f_locals.has_key('__return__'): - rv = frame.f_locals['__return__'] - s = s + '->' - s = s + repr.repr(rv) - line = linecache.getline(filename, lineno) - if line: s = s + lprefix + string.strip(line) - return s - - # The following two methods can be called by clients to use - # a debugger to debug a statement, given as a string. - - 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: - 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: - try: - return eval(expr, globals, locals) - except BdbQuit: - pass - finally: - self.quitting = 1 - sys.settrace(None) - - def runctx(self, cmd, globals, locals): - # B/W compatibility - self.run(cmd, globals, locals) - - # This method is more useful to debug a single function call. - - def runcall(self, func, *args): - self.reset() - sys.settrace(self.trace_dispatch) - res = None - try: - try: - res = apply(func, args) - except BdbQuit: - pass - finally: - self.quitting = 1 - sys.settrace(None) - return res + + """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): + canonic = self.fncache.get(filename) + if not canonic: + canonic = os.path.abspath(filename) + 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) + print 'bdb.Bdb.dispatch: unknown debugging event:', `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): + # XXX 'arg' is no longer used + if self.botframe is None: + # First call of dispatch since reset() + self.botframe = frame + return self.trace_dispatch + if not (self.stop_here(frame) or self.break_anywhere(frame)): + # No need to trace this function + 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 + + 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 + + # Normally derived classes don't override the following + # methods, but they may if they want to redefine the + # definition of stopping and breakpoints. + + def stop_here(self, frame): + if self.stopframe is None: + return 1 + if frame is self.stopframe: + return 1 + while frame is not None and frame is not self.stopframe: + if frame is self.botframe: + return 1 + frame = frame.f_back + return 0 + + def break_here(self, frame): + filename = self.canonic(frame.f_code.co_filename) + if not self.breaks.has_key(filename): + return 0 + lineno = frame.f_lineno + if not lineno in self.breaks[filename]: + return 0 + # flag says ok to delete temp. bp + (bp, flag) = effective(filename, lineno, frame) + if bp: + self.currentbp = bp.number + if (flag and bp.temporary): + self.do_clear(str(bp.number)) + return 1 + else: + return 0 + + def break_anywhere(self, frame): + return self.breaks.has_key( + self.canonic(frame.f_code.co_filename)) + + # Derived classes should override the user_* methods + # to gain control. + + 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, (exc_type, exc_value, exc_traceback)): + """This method is called if an exception occurs, + but only if we are to stop at or just below this level.""" + pass + + # Derived classes and clients can call the following methods + # to affect the stepping state. + + 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): + """Start debugging from here.""" + try: + 1 + '' + except: + frame = sys.exc_info()[2].tb_frame.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): + # Don't stop except at breakpoints or when finished + self.stopframe = self.botframe + self.returnframe = None + self.quitting = 0 + if not self.breaks: + # no breakpoints; run without debugger overhead + sys.settrace(None) + try: + 1 + '' # raise an exception + except: + frame = sys.exc_info()[2].tb_frame.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) + + # Derived classes and clients can call the following methods + # to manipulate breakpoints. These methods return an + # error message is something went wrong, None if all is well. + # Set_break prints out the breakpoint line and file:lineno. + # Call self.get_*break*() to see the breakpoints or better + # for bp in Breakpoint.bpbynumber: if bp: bp.bpprint(). + + def set_break(self, filename, lineno, temporary=0, cond = None): + filename = self.canonic(filename) + import linecache # Import as late as possible + line = linecache.getline(filename, lineno) + if not line: + return 'Line %s:%d does not exist' % (filename, + lineno) + if not self.breaks.has_key(filename): + self.breaks[filename] = [] + list = self.breaks[filename] + if not lineno in list: + list.append(lineno) + bp = Breakpoint(filename, lineno, temporary, cond) + + def clear_break(self, filename, lineno): + filename = self.canonic(filename) + if not self.breaks.has_key(filename): + 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) + # If there's only one bp in the list for that file,line + # pair, then remove the breaks entry + 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 not self.breaks.has_key(filename): + 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() + self.breaks = {} + + def get_break(self, filename, lineno): + filename = self.canonic(filename) + return self.breaks.has_key(filename) and \ + lineno in self.breaks[filename] + + def get_breaks(self, filename, lineno): + filename = self.canonic(filename) + return self.breaks.has_key(filename) and \ + lineno in self.breaks[filename] and \ + Breakpoint.bplist[filename, lineno] or [] + + def get_file_breaks(self, filename): + filename = self.canonic(filename) + if self.breaks.has_key(filename): + return self.breaks[filename] + else: + return [] + + def get_all_breaks(self): + return self.breaks + + # Derived classes and clients can call the following method + # to get a data structure representing a stack trace. + + 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, repr, string + frame, lineno = frame_lineno + filename = self.canonic(frame.f_code.co_filename) + s = filename + '(' + `lineno` + ')' + if frame.f_code.co_name: + s = s + frame.f_code.co_name + else: + s = s + "<lambda>" + if frame.f_locals.has_key('__args__'): + args = frame.f_locals['__args__'] + else: + args = None + if args: + s = s + repr.repr(args) + else: + s = s + '()' + if frame.f_locals.has_key('__return__'): + rv = frame.f_locals['__return__'] + s = s + '->' + s = s + repr.repr(rv) + line = linecache.getline(filename, lineno) + if line: s = s + lprefix + string.strip(line) + return s + + # The following two methods can be called by clients to use + # a debugger to debug a statement, given as a string. + + 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: + 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: + try: + return eval(expr, globals, locals) + except BdbQuit: + pass + finally: + self.quitting = 1 + sys.settrace(None) + + def runctx(self, cmd, globals, locals): + # B/W compatibility + self.run(cmd, globals, locals) + + # This method is more useful to debug a single function call. + + def runcall(self, func, *args): + self.reset() + sys.settrace(self.trace_dispatch) + res = None + try: + try: + res = apply(func, args) + except BdbQuit: + pass + finally: + self.quitting = 1 + sys.settrace(None) + return res def set_trace(): - Bdb().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. - - """ - - # XXX Keeping state in the class is a mistake -- this means - # you cannot have more than one active Bdb instance. - - next = 1 # Next bp to be assigned - bplist = {} # indexed by (file, lineno) tuple - bpbynumber = [None] # Each entry is None or an instance of Bpt - # index 0 is unused, except for marking an - # effective break .... see effective() - - def __init__(self, file, line, temporary=0, cond = None): - self.file = file # This better be in canonical form! - 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 - # Build the two lists - 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 # No longer in list - self.bplist[index].remove(self) - if not self.bplist[index]: - # No more bp for this f:l combo - 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)) + """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. + + """ + + # XXX Keeping state in the class is a mistake -- this means + # you cannot have more than one active Bdb instance. + + next = 1 # Next bp to be assigned + bplist = {} # indexed by (file, lineno) tuple + bpbynumber = [None] # Each entry is None or an instance of Bpt + # index 0 is unused, except for marking an + # effective break .... see effective() + + def __init__(self, file, line, temporary=0, cond = None): + self.file = file # This better be in canonical form! + 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 + # Build the two lists + 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 # No longer in list + self.bplist[index].remove(self) + if not self.bplist[index]: + # No more bp for this f:l combo + 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)) # -----------end of Breakpoint class---------- # Determines if there is an effective (active) breakpoint at this # line of code. Returns breakpoint number or 0 if none 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 - # Count every hit when bp is enabled - b.hits = b.hits + 1 - if not b.cond: - # If unconditional, and ignoring, - # go on to next, else break - if b.ignore > 0: - b.ignore = b.ignore -1 - continue - else: - # breakpoint and marker that's ok - # to delete if temporary - return (b,1) - else: - # Conditional bp. - # Ignore count applies only to those bpt hits where the - # condition evaluates to true. - try: - val = eval(b.cond, frame.f_globals, - frame.f_locals) - if val: - if b.ignore > 0: - b.ignore = b.ignore -1 - # continue - else: - return (b,1) - # else: - # continue - except: - # if eval fails, most conservative - # thing is to stop on breakpoint - # regardless of ignore count. - # Don't delete temporary, - # as another hint to user. - return (b,0) - return (None, None) + """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 + # Count every hit when bp is enabled + b.hits = b.hits + 1 + if not b.cond: + # If unconditional, and ignoring, + # go on to next, else break + if b.ignore > 0: + b.ignore = b.ignore -1 + continue + else: + # breakpoint and marker that's ok + # to delete if temporary + return (b,1) + else: + # Conditional bp. + # Ignore count applies only to those bpt hits where the + # condition evaluates to true. + try: + val = eval(b.cond, frame.f_globals, + frame.f_locals) + if val: + if b.ignore > 0: + b.ignore = b.ignore -1 + # continue + else: + return (b,1) + # else: + # continue + except: + # if eval fails, most conservative + # thing is to stop on breakpoint + # regardless of ignore count. + # Don't delete temporary, + # as another hint to user. + return (b,0) + return (None, None) # -------------------- testing -------------------- 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, string - 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, ':', string.strip(line) - def user_return(self, frame, retval): - print '+++ return', retval - def user_exception(self, frame, exc_stuff): - print '+++ exception', exc_stuff - self.set_continue() + 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, string + 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, ':', string.strip(line) + 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 + print 'foo(', n, ')' + x = bar(n*10) + print 'bar returned', x def bar(a): - print 'bar(', a, ')' - return a/2 + print 'bar(', a, ')' + return a/2 def test(): - t = Tdb() - t.run('import bdb; bdb.foo(10)') + t = Tdb() + t.run('import bdb; bdb.foo(10)') |