| 1 | """Debugger basics""" |
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| 2 | |
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| 3 | import fnmatch |
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| 4 | import sys |
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| 5 | import os |
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| 6 | import types |
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| 7 | |
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| 8 | __all__ = ["BdbQuit","Bdb","Breakpoint"] |
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| 9 | |
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| 10 | class BdbQuit(Exception): |
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| 11 | """Exception to give up completely""" |
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| 12 | |
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| 13 | |
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| 14 | class Bdb: |
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| 15 | |
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| 16 | """Generic Python debugger base class. |
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| 17 | |
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| 18 | This class takes care of details of the trace facility; |
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| 19 | a derived class should implement user interaction. |
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| 20 | The standard debugger class (pdb.Pdb) is an example. |
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| 21 | """ |
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| 22 | |
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| 23 | def __init__(self, skip=None): |
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| 24 | self.skip = set(skip) if skip else None |
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| 25 | self.breaks = {} |
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| 26 | self.fncache = {} |
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| 27 | self.frame_returning = None |
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| 28 | |
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| 29 | def canonic(self, filename): |
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| 30 | if filename == "<" + filename[1:-1] + ">": |
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| 31 | return filename |
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| 32 | canonic = self.fncache.get(filename) |
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| 33 | if not canonic: |
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| 34 | canonic = os.path.abspath(filename) |
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| 35 | canonic = os.path.normcase(canonic) |
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| 36 | self.fncache[filename] = canonic |
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| 37 | return canonic |
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| 38 | |
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| 39 | def reset(self): |
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| 40 | import linecache |
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| 41 | linecache.checkcache() |
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| 42 | self.botframe = None |
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| 43 | self._set_stopinfo(None, None) |
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| 44 | |
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| 45 | def trace_dispatch(self, frame, event, arg): |
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| 46 | if self.quitting: |
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| 47 | return # None |
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| 48 | if event == 'line': |
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| 49 | return self.dispatch_line(frame) |
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| 50 | if event == 'call': |
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| 51 | return self.dispatch_call(frame, arg) |
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| 52 | if event == 'return': |
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| 53 | return self.dispatch_return(frame, arg) |
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| 54 | if event == 'exception': |
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| 55 | return self.dispatch_exception(frame, arg) |
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| 56 | if event == 'c_call': |
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| 57 | return self.trace_dispatch |
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| 58 | if event == 'c_exception': |
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| 59 | return self.trace_dispatch |
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| 60 | if event == 'c_return': |
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| 61 | return self.trace_dispatch |
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| 62 | print 'bdb.Bdb.dispatch: unknown debugging event:', repr(event) |
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| 63 | return self.trace_dispatch |
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| 64 | |
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| 65 | def dispatch_line(self, frame): |
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| 66 | if self.stop_here(frame) or self.break_here(frame): |
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| 67 | self.user_line(frame) |
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| 68 | if self.quitting: raise BdbQuit |
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| 69 | return self.trace_dispatch |
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| 70 | |
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| 71 | def dispatch_call(self, frame, arg): |
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| 72 | # XXX 'arg' is no longer used |
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| 73 | if self.botframe is None: |
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| 74 | # First call of dispatch since reset() |
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| 75 | self.botframe = frame.f_back # (CT) Note that this may also be None! |
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| 76 | return self.trace_dispatch |
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| 77 | if not (self.stop_here(frame) or self.break_anywhere(frame)): |
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| 78 | # No need to trace this function |
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| 79 | return # None |
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| 80 | self.user_call(frame, arg) |
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| 81 | if self.quitting: raise BdbQuit |
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| 82 | return self.trace_dispatch |
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| 83 | |
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| 84 | def dispatch_return(self, frame, arg): |
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| 85 | if self.stop_here(frame) or frame == self.returnframe: |
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| 86 | try: |
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| 87 | self.frame_returning = frame |
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| 88 | self.user_return(frame, arg) |
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| 89 | finally: |
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| 90 | self.frame_returning = None |
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| 91 | if self.quitting: raise BdbQuit |
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| 92 | return self.trace_dispatch |
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| 93 | |
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| 94 | def dispatch_exception(self, frame, arg): |
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| 95 | if self.stop_here(frame): |
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| 96 | self.user_exception(frame, arg) |
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| 97 | if self.quitting: raise BdbQuit |
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| 98 | return self.trace_dispatch |
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| 99 | |
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| 100 | # Normally derived classes don't override the following |
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| 101 | # methods, but they may if they want to redefine the |
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| 102 | # definition of stopping and breakpoints. |
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| 103 | |
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| 104 | def is_skipped_module(self, module_name): |
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| 105 | for pattern in self.skip: |
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| 106 | if fnmatch.fnmatch(module_name, pattern): |
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| 107 | return True |
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| 108 | return False |
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| 109 | |
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| 110 | def stop_here(self, frame): |
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| 111 | # (CT) stopframe may now also be None, see dispatch_call. |
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| 112 | # (CT) the former test for None is therefore removed from here. |
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| 113 | if self.skip and \ |
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| 114 | self.is_skipped_module(frame.f_globals.get('__name__')): |
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| 115 | return False |
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| 116 | if frame is self.stopframe: |
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| 117 | if self.stoplineno == -1: |
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| 118 | return False |
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| 119 | return frame.f_lineno >= self.stoplineno |
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| 120 | while frame is not None and frame is not self.stopframe: |
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| 121 | if frame is self.botframe: |
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| 122 | return True |
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| 123 | frame = frame.f_back |
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| 124 | return False |
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| 125 | |
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| 126 | def break_here(self, frame): |
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| 127 | filename = self.canonic(frame.f_code.co_filename) |
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| 128 | if not filename in self.breaks: |
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| 129 | return False |
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| 130 | lineno = frame.f_lineno |
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| 131 | if not lineno in self.breaks[filename]: |
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| 132 | # The line itself has no breakpoint, but maybe the line is the |
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| 133 | # first line of a function with breakpoint set by function name. |
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| 134 | lineno = frame.f_code.co_firstlineno |
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| 135 | if not lineno in self.breaks[filename]: |
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| 136 | return False |
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| 137 | |
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| 138 | # flag says ok to delete temp. bp |
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| 139 | (bp, flag) = effective(filename, lineno, frame) |
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| 140 | if bp: |
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| 141 | self.currentbp = bp.number |
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| 142 | if (flag and bp.temporary): |
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| 143 | self.do_clear(str(bp.number)) |
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| 144 | return True |
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| 145 | else: |
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| 146 | return False |
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| 147 | |
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| 148 | def do_clear(self, arg): |
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| 149 | raise NotImplementedError, "subclass of bdb must implement do_clear()" |
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| 150 | |
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| 151 | def break_anywhere(self, frame): |
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| 152 | return self.canonic(frame.f_code.co_filename) in self.breaks |
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| 153 | |
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| 154 | # Derived classes should override the user_* methods |
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| 155 | # to gain control. |
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| 156 | |
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| 157 | def user_call(self, frame, argument_list): |
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| 158 | """This method is called when there is the remote possibility |
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| 159 | that we ever need to stop in this function.""" |
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| 160 | pass |
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| 161 | |
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| 162 | def user_line(self, frame): |
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| 163 | """This method is called when we stop or break at this line.""" |
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| 164 | pass |
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| 165 | |
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| 166 | def user_return(self, frame, return_value): |
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| 167 | """This method is called when a return trap is set here.""" |
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| 168 | pass |
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| 169 | |
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| 170 | def user_exception(self, frame, exc_info): |
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| 171 | exc_type, exc_value, exc_traceback = exc_info |
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| 172 | """This method is called if an exception occurs, |
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| 173 | but only if we are to stop at or just below this level.""" |
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| 174 | pass |
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| 175 | |
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| 176 | def _set_stopinfo(self, stopframe, returnframe, stoplineno=0): |
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| 177 | self.stopframe = stopframe |
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| 178 | self.returnframe = returnframe |
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| 179 | self.quitting = 0 |
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| 180 | # stoplineno >= 0 means: stop at line >= the stoplineno |
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| 181 | # stoplineno -1 means: don't stop at all |
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| 182 | self.stoplineno = stoplineno |
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| 183 | |
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| 184 | # Derived classes and clients can call the following methods |
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| 185 | # to affect the stepping state. |
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| 186 | |
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| 187 | def set_until(self, frame): #the name "until" is borrowed from gdb |
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| 188 | """Stop when the line with the line no greater than the current one is |
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| 189 | reached or when returning from current frame""" |
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| 190 | self._set_stopinfo(frame, frame, frame.f_lineno+1) |
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| 191 | |
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| 192 | def set_step(self): |
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| 193 | """Stop after one line of code.""" |
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| 194 | # Issue #13183: pdb skips frames after hitting a breakpoint and running |
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| 195 | # step commands. |
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| 196 | # Restore the trace function in the caller (that may not have been set |
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| 197 | # for performance reasons) when returning from the current frame. |
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| 198 | if self.frame_returning: |
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| 199 | caller_frame = self.frame_returning.f_back |
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| 200 | if caller_frame and not caller_frame.f_trace: |
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| 201 | caller_frame.f_trace = self.trace_dispatch |
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| 202 | self._set_stopinfo(None, None) |
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| 203 | |
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| 204 | def set_next(self, frame): |
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| 205 | """Stop on the next line in or below the given frame.""" |
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| 206 | self._set_stopinfo(frame, None) |
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| 207 | |
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| 208 | def set_return(self, frame): |
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| 209 | """Stop when returning from the given frame.""" |
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| 210 | self._set_stopinfo(frame.f_back, frame) |
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| 211 | |
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| 212 | def set_trace(self, frame=None): |
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| 213 | """Start debugging from `frame`. |
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| 214 | |
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| 215 | If frame is not specified, debugging starts from caller's frame. |
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| 216 | """ |
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| 217 | if frame is None: |
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| 218 | frame = sys._getframe().f_back |
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| 219 | self.reset() |
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| 220 | while frame: |
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| 221 | frame.f_trace = self.trace_dispatch |
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| 222 | self.botframe = frame |
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| 223 | frame = frame.f_back |
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| 224 | self.set_step() |
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| 225 | sys.settrace(self.trace_dispatch) |
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| 226 | |
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| 227 | def set_continue(self): |
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| 228 | # Don't stop except at breakpoints or when finished |
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| 229 | self._set_stopinfo(self.botframe, None, -1) |
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| 230 | if not self.breaks: |
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| 231 | # no breakpoints; run without debugger overhead |
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| 232 | sys.settrace(None) |
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| 233 | frame = sys._getframe().f_back |
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| 234 | while frame and frame is not self.botframe: |
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| 235 | del frame.f_trace |
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| 236 | frame = frame.f_back |
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| 237 | |
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| 238 | def set_quit(self): |
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| 239 | self.stopframe = self.botframe |
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| 240 | self.returnframe = None |
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| 241 | self.quitting = 1 |
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| 242 | sys.settrace(None) |
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| 243 | |
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| 244 | # Derived classes and clients can call the following methods |
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| 245 | # to manipulate breakpoints. These methods return an |
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| 246 | # error message is something went wrong, None if all is well. |
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| 247 | # Set_break prints out the breakpoint line and file:lineno. |
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| 248 | # Call self.get_*break*() to see the breakpoints or better |
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| 249 | # for bp in Breakpoint.bpbynumber: if bp: bp.bpprint(). |
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| 250 | |
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| 251 | def set_break(self, filename, lineno, temporary=0, cond = None, |
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| 252 | funcname=None): |
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| 253 | filename = self.canonic(filename) |
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| 254 | import linecache # Import as late as possible |
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| 255 | line = linecache.getline(filename, lineno) |
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| 256 | if not line: |
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| 257 | return 'Line %s:%d does not exist' % (filename, |
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| 258 | lineno) |
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| 259 | if not filename in self.breaks: |
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| 260 | self.breaks[filename] = [] |
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| 261 | list = self.breaks[filename] |
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| 262 | if not lineno in list: |
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| 263 | list.append(lineno) |
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| 264 | bp = Breakpoint(filename, lineno, temporary, cond, funcname) |
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| 265 | |
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| 266 | def _prune_breaks(self, filename, lineno): |
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| 267 | if (filename, lineno) not in Breakpoint.bplist: |
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| 268 | self.breaks[filename].remove(lineno) |
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| 269 | if not self.breaks[filename]: |
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| 270 | del self.breaks[filename] |
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| 271 | |
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| 272 | def clear_break(self, filename, lineno): |
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| 273 | filename = self.canonic(filename) |
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| 274 | if not filename in self.breaks: |
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| 275 | return 'There are no breakpoints in %s' % filename |
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| 276 | if lineno not in self.breaks[filename]: |
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| 277 | return 'There is no breakpoint at %s:%d' % (filename, |
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| 278 | lineno) |
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| 279 | # If there's only one bp in the list for that file,line |
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| 280 | # pair, then remove the breaks entry |
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| 281 | for bp in Breakpoint.bplist[filename, lineno][:]: |
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| 282 | bp.deleteMe() |
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| 283 | self._prune_breaks(filename, lineno) |
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| 284 | |
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| 285 | def clear_bpbynumber(self, arg): |
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| 286 | try: |
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| 287 | number = int(arg) |
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| 288 | except: |
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| 289 | return 'Non-numeric breakpoint number (%s)' % arg |
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| 290 | try: |
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| 291 | bp = Breakpoint.bpbynumber[number] |
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| 292 | except IndexError: |
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| 293 | return 'Breakpoint number (%d) out of range' % number |
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| 294 | if not bp: |
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| 295 | return 'Breakpoint (%d) already deleted' % number |
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| 296 | bp.deleteMe() |
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| 297 | self._prune_breaks(bp.file, bp.line) |
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| 298 | |
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| 299 | def clear_all_file_breaks(self, filename): |
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| 300 | filename = self.canonic(filename) |
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| 301 | if not filename in self.breaks: |
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| 302 | return 'There are no breakpoints in %s' % filename |
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| 303 | for line in self.breaks[filename]: |
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| 304 | blist = Breakpoint.bplist[filename, line] |
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| 305 | for bp in blist: |
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| 306 | bp.deleteMe() |
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| 307 | del self.breaks[filename] |
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| 308 | |
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| 309 | def clear_all_breaks(self): |
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| 310 | if not self.breaks: |
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| 311 | return 'There are no breakpoints' |
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| 312 | for bp in Breakpoint.bpbynumber: |
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| 313 | if bp: |
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| 314 | bp.deleteMe() |
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| 315 | self.breaks = {} |
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| 316 | |
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| 317 | def get_break(self, filename, lineno): |
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| 318 | filename = self.canonic(filename) |
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| 319 | return filename in self.breaks and \ |
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| 320 | lineno in self.breaks[filename] |
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| 321 | |
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| 322 | def get_breaks(self, filename, lineno): |
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| 323 | filename = self.canonic(filename) |
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| 324 | return filename in self.breaks and \ |
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| 325 | lineno in self.breaks[filename] and \ |
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| 326 | Breakpoint.bplist[filename, lineno] or [] |
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| 327 | |
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| 328 | def get_file_breaks(self, filename): |
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| 329 | filename = self.canonic(filename) |
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| 330 | if filename in self.breaks: |
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| 331 | return self.breaks[filename] |
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| 332 | else: |
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| 333 | return [] |
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| 334 | |
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| 335 | def get_all_breaks(self): |
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| 336 | return self.breaks |
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| 337 | |
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| 338 | # Derived classes and clients can call the following method |
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| 339 | # to get a data structure representing a stack trace. |
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| 340 | |
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| 341 | def get_stack(self, f, t): |
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| 342 | stack = [] |
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| 343 | if t and t.tb_frame is f: |
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| 344 | t = t.tb_next |
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| 345 | while f is not None: |
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| 346 | stack.append((f, f.f_lineno)) |
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| 347 | if f is self.botframe: |
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| 348 | break |
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| 349 | f = f.f_back |
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| 350 | stack.reverse() |
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| 351 | i = max(0, len(stack) - 1) |
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| 352 | while t is not None: |
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| 353 | stack.append((t.tb_frame, t.tb_lineno)) |
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| 354 | t = t.tb_next |
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| 355 | if f is None: |
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| 356 | i = max(0, len(stack) - 1) |
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| 357 | return stack, i |
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| 358 | |
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| 359 | # |
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| 360 | |
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| 361 | def format_stack_entry(self, frame_lineno, lprefix=': '): |
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| 362 | import linecache, repr |
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| 363 | frame, lineno = frame_lineno |
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| 364 | filename = self.canonic(frame.f_code.co_filename) |
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| 365 | s = '%s(%r)' % (filename, lineno) |
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| 366 | if frame.f_code.co_name: |
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| 367 | s = s + frame.f_code.co_name |
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| 368 | else: |
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| 369 | s = s + "<lambda>" |
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| 370 | if '__args__' in frame.f_locals: |
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| 371 | args = frame.f_locals['__args__'] |
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| 372 | else: |
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| 373 | args = None |
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| 374 | if args: |
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| 375 | s = s + repr.repr(args) |
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| 376 | else: |
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| 377 | s = s + '()' |
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| 378 | if '__return__' in frame.f_locals: |
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| 379 | rv = frame.f_locals['__return__'] |
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| 380 | s = s + '->' |
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| 381 | s = s + repr.repr(rv) |
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| 382 | line = linecache.getline(filename, lineno, frame.f_globals) |
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| 383 | if line: s = s + lprefix + line.strip() |
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| 384 | return s |
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| 385 | |
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| 386 | # The following two methods can be called by clients to use |
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| 387 | # a debugger to debug a statement, given as a string. |
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| 388 | |
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| 389 | def run(self, cmd, globals=None, locals=None): |
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| 390 | if globals is None: |
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| 391 | import __main__ |
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| 392 | globals = __main__.__dict__ |
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| 393 | if locals is None: |
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| 394 | locals = globals |
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| 395 | self.reset() |
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| 396 | sys.settrace(self.trace_dispatch) |
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| 397 | if not isinstance(cmd, types.CodeType): |
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| 398 | cmd = cmd+'\n' |
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| 399 | try: |
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| 400 | exec cmd in globals, locals |
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| 401 | except BdbQuit: |
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| 402 | pass |
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| 403 | finally: |
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| 404 | self.quitting = 1 |
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| 405 | sys.settrace(None) |
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| 406 | |
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| 407 | def runeval(self, expr, globals=None, locals=None): |
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| 408 | if globals is None: |
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| 409 | import __main__ |
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| 410 | globals = __main__.__dict__ |
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| 411 | if locals is None: |
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| 412 | locals = globals |
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| 413 | self.reset() |
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| 414 | sys.settrace(self.trace_dispatch) |
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| 415 | if not isinstance(expr, types.CodeType): |
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| 416 | expr = expr+'\n' |
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| 417 | try: |
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| 418 | return eval(expr, globals, locals) |
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| 419 | except BdbQuit: |
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| 420 | pass |
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| 421 | finally: |
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| 422 | self.quitting = 1 |
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| 423 | sys.settrace(None) |
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| 424 | |
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| 425 | def runctx(self, cmd, globals, locals): |
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| 426 | # B/W compatibility |
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| 427 | self.run(cmd, globals, locals) |
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| 428 | |
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| 429 | # This method is more useful to debug a single function call. |
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| 430 | |
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| 431 | def runcall(self, func, *args, **kwds): |
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| 432 | self.reset() |
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| 433 | sys.settrace(self.trace_dispatch) |
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| 434 | res = None |
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| 435 | try: |
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| 436 | res = func(*args, **kwds) |
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| 437 | except BdbQuit: |
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| 438 | pass |
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| 439 | finally: |
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| 440 | self.quitting = 1 |
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| 441 | sys.settrace(None) |
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| 442 | return res |
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| 443 | |
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| 444 | |
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| 445 | def set_trace(): |
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| 446 | Bdb().set_trace() |
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| 447 | |
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| 448 | |
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| 449 | class Breakpoint: |
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| 450 | |
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| 451 | """Breakpoint class |
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| 452 | |
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| 453 | Implements temporary breakpoints, ignore counts, disabling and |
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| 454 | (re)-enabling, and conditionals. |
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| 455 | |
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| 456 | Breakpoints are indexed by number through bpbynumber and by |
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| 457 | the file,line tuple using bplist. The former points to a |
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| 458 | single instance of class Breakpoint. The latter points to a |
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| 459 | list of such instances since there may be more than one |
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| 460 | breakpoint per line. |
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| 461 | |
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| 462 | """ |
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| 463 | |
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| 464 | # XXX Keeping state in the class is a mistake -- this means |
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| 465 | # you cannot have more than one active Bdb instance. |
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| 466 | |
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| 467 | next = 1 # Next bp to be assigned |
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| 468 | bplist = {} # indexed by (file, lineno) tuple |
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| 469 | bpbynumber = [None] # Each entry is None or an instance of Bpt |
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| 470 | # index 0 is unused, except for marking an |
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| 471 | # effective break .... see effective() |
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| 472 | |
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| 473 | def __init__(self, file, line, temporary=0, cond=None, funcname=None): |
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| 474 | self.funcname = funcname |
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| 475 | # Needed if funcname is not None. |
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| 476 | self.func_first_executable_line = None |
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| 477 | self.file = file # This better be in canonical form! |
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| 478 | self.line = line |
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| 479 | self.temporary = temporary |
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| 480 | self.cond = cond |
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| 481 | self.enabled = 1 |
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| 482 | self.ignore = 0 |
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| 483 | self.hits = 0 |
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| 484 | self.number = Breakpoint.next |
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| 485 | Breakpoint.next = Breakpoint.next + 1 |
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| 486 | # Build the two lists |
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| 487 | self.bpbynumber.append(self) |
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| 488 | if (file, line) in self.bplist: |
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| 489 | self.bplist[file, line].append(self) |
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| 490 | else: |
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| 491 | self.bplist[file, line] = [self] |
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| 492 | |
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| 493 | |
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| 494 | def deleteMe(self): |
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| 495 | index = (self.file, self.line) |
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| 496 | self.bpbynumber[self.number] = None # No longer in list |
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| 497 | self.bplist[index].remove(self) |
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| 498 | if not self.bplist[index]: |
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| 499 | # No more bp for this f:l combo |
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| 500 | del self.bplist[index] |
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| 501 | |
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| 502 | def enable(self): |
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| 503 | self.enabled = 1 |
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| 504 | |
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| 505 | def disable(self): |
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| 506 | self.enabled = 0 |
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| 507 | |
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| 508 | def bpprint(self, out=None): |
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| 509 | if out is None: |
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| 510 | out = sys.stdout |
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| 511 | if self.temporary: |
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| 512 | disp = 'del ' |
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| 513 | else: |
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| 514 | disp = 'keep ' |
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| 515 | if self.enabled: |
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| 516 | disp = disp + 'yes ' |
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| 517 | else: |
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| 518 | disp = disp + 'no ' |
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| 519 | print >>out, '%-4dbreakpoint %s at %s:%d' % (self.number, disp, |
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| 520 | self.file, self.line) |
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| 521 | if self.cond: |
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| 522 | print >>out, '\tstop only if %s' % (self.cond,) |
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| 523 | if self.ignore: |
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| 524 | print >>out, '\tignore next %d hits' % (self.ignore) |
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| 525 | if (self.hits): |
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| 526 | if (self.hits > 1): ss = 's' |
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| 527 | else: ss = '' |
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| 528 | print >>out, ('\tbreakpoint already hit %d time%s' % |
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| 529 | (self.hits, ss)) |
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| 530 | |
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| 531 | # -----------end of Breakpoint class---------- |
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| 532 | |
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| 533 | def checkfuncname(b, frame): |
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| 534 | """Check whether we should break here because of `b.funcname`.""" |
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| 535 | if not b.funcname: |
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| 536 | # Breakpoint was set via line number. |
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| 537 | if b.line != frame.f_lineno: |
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| 538 | # Breakpoint was set at a line with a def statement and the function |
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| 539 | # defined is called: don't break. |
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| 540 | return False |
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| 541 | return True |
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| 542 | |
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| 543 | # Breakpoint set via function name. |
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| 544 | |
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| 545 | if frame.f_code.co_name != b.funcname: |
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| 546 | # It's not a function call, but rather execution of def statement. |
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| 547 | return False |
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| 548 | |
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| 549 | # We are in the right frame. |
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| 550 | if not b.func_first_executable_line: |
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| 551 | # The function is entered for the 1st time. |
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| 552 | b.func_first_executable_line = frame.f_lineno |
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| 553 | |
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| 554 | if b.func_first_executable_line != frame.f_lineno: |
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| 555 | # But we are not at the first line number: don't break. |
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| 556 | return False |
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| 557 | return True |
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| 558 | |
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| 559 | # Determines if there is an effective (active) breakpoint at this |
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| 560 | # line of code. Returns breakpoint number or 0 if none |
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| 561 | def effective(file, line, frame): |
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| 562 | """Determine which breakpoint for this file:line is to be acted upon. |
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| 563 | |
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| 564 | Called only if we know there is a bpt at this |
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| 565 | location. Returns breakpoint that was triggered and a flag |
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| 566 | that indicates if it is ok to delete a temporary bp. |
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| 567 | |
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| 568 | """ |
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| 569 | possibles = Breakpoint.bplist[file,line] |
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| 570 | for i in range(0, len(possibles)): |
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| 571 | b = possibles[i] |
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| 572 | if b.enabled == 0: |
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| 573 | continue |
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| 574 | if not checkfuncname(b, frame): |
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| 575 | continue |
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| 576 | # Count every hit when bp is enabled |
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| 577 | b.hits = b.hits + 1 |
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| 578 | if not b.cond: |
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| 579 | # If unconditional, and ignoring, |
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| 580 | # go on to next, else break |
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| 581 | if b.ignore > 0: |
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| 582 | b.ignore = b.ignore -1 |
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| 583 | continue |
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| 584 | else: |
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| 585 | # breakpoint and marker that's ok |
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| 586 | # to delete if temporary |
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| 587 | return (b,1) |
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| 588 | else: |
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| 589 | # Conditional bp. |
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| 590 | # Ignore count applies only to those bpt hits where the |
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| 591 | # condition evaluates to true. |
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| 592 | try: |
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| 593 | val = eval(b.cond, frame.f_globals, |
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| 594 | frame.f_locals) |
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| 595 | if val: |
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| 596 | if b.ignore > 0: |
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| 597 | b.ignore = b.ignore -1 |
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| 598 | # continue |
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| 599 | else: |
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| 600 | return (b,1) |
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| 601 | # else: |
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| 602 | # continue |
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| 603 | except: |
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| 604 | # if eval fails, most conservative |
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| 605 | # thing is to stop on breakpoint |
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| 606 | # regardless of ignore count. |
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| 607 | # Don't delete temporary, |
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| 608 | # as another hint to user. |
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| 609 | return (b,0) |
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| 610 | return (None, None) |
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| 611 | |
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| 612 | # -------------------- testing -------------------- |
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| 613 | |
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| 614 | class Tdb(Bdb): |
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| 615 | def user_call(self, frame, args): |
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| 616 | name = frame.f_code.co_name |
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| 617 | if not name: name = '???' |
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| 618 | print '+++ call', name, args |
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| 619 | def user_line(self, frame): |
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| 620 | import linecache |
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| 621 | name = frame.f_code.co_name |
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| 622 | if not name: name = '???' |
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| 623 | fn = self.canonic(frame.f_code.co_filename) |
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| 624 | line = linecache.getline(fn, frame.f_lineno, frame.f_globals) |
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| 625 | print '+++', fn, frame.f_lineno, name, ':', line.strip() |
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| 626 | def user_return(self, frame, retval): |
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| 627 | print '+++ return', retval |
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| 628 | def user_exception(self, frame, exc_stuff): |
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| 629 | print '+++ exception', exc_stuff |
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| 630 | self.set_continue() |
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| 631 | |
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| 632 | def foo(n): |
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| 633 | print 'foo(', n, ')' |
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| 634 | x = bar(n*10) |
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| 635 | print 'bar returned', x |
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| 636 | |
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| 637 | def bar(a): |
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| 638 | print 'bar(', a, ')' |
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| 639 | return a/2 |
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| 640 | |
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| 641 | def test(): |
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| 642 | t = Tdb() |
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| 643 | t.run('import bdb; bdb.foo(10)') |
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| 644 | |
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| 645 | # end |
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