| 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()
|
|---|
| 414 | sys.settrace(self.trace_dispatch)
|
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| 415 | if not isinstance(expr, types.CodeType):
|
|---|
| 416 | expr = expr+'\n'
|
|---|
| 417 | try:
|
|---|
| 418 | return eval(expr, globals, locals)
|
|---|
| 419 | except BdbQuit:
|
|---|
| 420 | pass
|
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| 421 | finally:
|
|---|
| 422 | self.quitting = 1
|
|---|
| 423 | sys.settrace(None)
|
|---|
| 424 |
|
|---|
| 425 | def runctx(self, cmd, globals, locals):
|
|---|
| 426 | # B/W compatibility
|
|---|
| 427 | self.run(cmd, globals, locals)
|
|---|
| 428 |
|
|---|
| 429 | # This method is more useful to debug a single function call.
|
|---|
| 430 |
|
|---|
| 431 | def runcall(self, func, *args, **kwds):
|
|---|
| 432 | self.reset()
|
|---|
| 433 | sys.settrace(self.trace_dispatch)
|
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| 434 | res = None
|
|---|
| 435 | try:
|
|---|
| 436 | res = func(*args, **kwds)
|
|---|
| 437 | except BdbQuit:
|
|---|
| 438 | pass
|
|---|
| 439 | finally:
|
|---|
| 440 | self.quitting = 1
|
|---|
| 441 | sys.settrace(None)
|
|---|
| 442 | return res
|
|---|
| 443 |
|
|---|
| 444 |
|
|---|
| 445 | def set_trace():
|
|---|
| 446 | Bdb().set_trace()
|
|---|
| 447 |
|
|---|
| 448 |
|
|---|
| 449 | class Breakpoint:
|
|---|
| 450 |
|
|---|
| 451 | """Breakpoint class
|
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| 452 |
|
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| 453 | Implements temporary breakpoints, ignore counts, disabling and
|
|---|
| 454 | (re)-enabling, and conditionals.
|
|---|
| 455 |
|
|---|
| 456 | Breakpoints are indexed by number through bpbynumber and by
|
|---|
| 457 | the file,line tuple using bplist. The former points to a
|
|---|
| 458 | single instance of class Breakpoint. The latter points to a
|
|---|
| 459 | list of such instances since there may be more than one
|
|---|
| 460 | breakpoint per line.
|
|---|
| 461 |
|
|---|
| 462 | """
|
|---|
| 463 |
|
|---|
| 464 | # XXX Keeping state in the class is a mistake -- this means
|
|---|
| 465 | # you cannot have more than one active Bdb instance.
|
|---|
| 466 |
|
|---|
| 467 | next = 1 # Next bp to be assigned
|
|---|
| 468 | bplist = {} # indexed by (file, lineno) tuple
|
|---|
| 469 | bpbynumber = [None] # Each entry is None or an instance of Bpt
|
|---|
| 470 | # index 0 is unused, except for marking an
|
|---|
| 471 | # effective break .... see effective()
|
|---|
| 472 |
|
|---|
| 473 | def __init__(self, file, line, temporary=0, cond=None, funcname=None):
|
|---|
| 474 | self.funcname = funcname
|
|---|
| 475 | # Needed if funcname is not None.
|
|---|
| 476 | self.func_first_executable_line = None
|
|---|
| 477 | self.file = file # This better be in canonical form!
|
|---|
| 478 | self.line = line
|
|---|
| 479 | self.temporary = temporary
|
|---|
| 480 | self.cond = cond
|
|---|
| 481 | self.enabled = 1
|
|---|
| 482 | self.ignore = 0
|
|---|
| 483 | self.hits = 0
|
|---|
| 484 | self.number = Breakpoint.next
|
|---|
| 485 | Breakpoint.next = Breakpoint.next + 1
|
|---|
| 486 | # Build the two lists
|
|---|
| 487 | self.bpbynumber.append(self)
|
|---|
| 488 | if (file, line) in self.bplist:
|
|---|
| 489 | self.bplist[file, line].append(self)
|
|---|
| 490 | else:
|
|---|
| 491 | self.bplist[file, line] = [self]
|
|---|
| 492 |
|
|---|
| 493 |
|
|---|
| 494 | def deleteMe(self):
|
|---|
| 495 | index = (self.file, self.line)
|
|---|
| 496 | self.bpbynumber[self.number] = None # No longer in list
|
|---|
| 497 | self.bplist[index].remove(self)
|
|---|
| 498 | if not self.bplist[index]:
|
|---|
| 499 | # No more bp for this f:l combo
|
|---|
| 500 | del self.bplist[index]
|
|---|
| 501 |
|
|---|
| 502 | def enable(self):
|
|---|
| 503 | self.enabled = 1
|
|---|
| 504 |
|
|---|
| 505 | def disable(self):
|
|---|
| 506 | self.enabled = 0
|
|---|
| 507 |
|
|---|
| 508 | def bpprint(self, out=None):
|
|---|
| 509 | if out is None:
|
|---|
| 510 | out = sys.stdout
|
|---|
| 511 | if self.temporary:
|
|---|
| 512 | disp = 'del '
|
|---|
| 513 | else:
|
|---|
| 514 | disp = 'keep '
|
|---|
| 515 | if self.enabled:
|
|---|
| 516 | disp = disp + 'yes '
|
|---|
| 517 | else:
|
|---|
| 518 | disp = disp + 'no '
|
|---|
| 519 | print >>out, '%-4dbreakpoint %s at %s:%d' % (self.number, disp,
|
|---|
| 520 | self.file, self.line)
|
|---|
| 521 | if self.cond:
|
|---|
| 522 | print >>out, '\tstop only if %s' % (self.cond,)
|
|---|
| 523 | if self.ignore:
|
|---|
| 524 | print >>out, '\tignore next %d hits' % (self.ignore)
|
|---|
| 525 | if (self.hits):
|
|---|
| 526 | if (self.hits > 1): ss = 's'
|
|---|
| 527 | else: ss = ''
|
|---|
| 528 | print >>out, ('\tbreakpoint already hit %d time%s' %
|
|---|
| 529 | (self.hits, ss))
|
|---|
| 530 |
|
|---|
| 531 | # -----------end of Breakpoint class----------
|
|---|
| 532 |
|
|---|
| 533 | def checkfuncname(b, frame):
|
|---|
| 534 | """Check whether we should break here because of `b.funcname`."""
|
|---|
| 535 | if not b.funcname:
|
|---|
| 536 | # Breakpoint was set via line number.
|
|---|
| 537 | if b.line != frame.f_lineno:
|
|---|
| 538 | # Breakpoint was set at a line with a def statement and the function
|
|---|
| 539 | # defined is called: don't break.
|
|---|
| 540 | return False
|
|---|
| 541 | return True
|
|---|
| 542 |
|
|---|
| 543 | # Breakpoint set via function name.
|
|---|
| 544 |
|
|---|
| 545 | if frame.f_code.co_name != b.funcname:
|
|---|
| 546 | # It's not a function call, but rather execution of def statement.
|
|---|
| 547 | return False
|
|---|
| 548 |
|
|---|
| 549 | # We are in the right frame.
|
|---|
| 550 | if not b.func_first_executable_line:
|
|---|
| 551 | # The function is entered for the 1st time.
|
|---|
| 552 | b.func_first_executable_line = frame.f_lineno
|
|---|
| 553 |
|
|---|
| 554 | if b.func_first_executable_line != frame.f_lineno:
|
|---|
| 555 | # But we are not at the first line number: don't break.
|
|---|
| 556 | return False
|
|---|
| 557 | return True
|
|---|
| 558 |
|
|---|
| 559 | # Determines if there is an effective (active) breakpoint at this
|
|---|
| 560 | # line of code. Returns breakpoint number or 0 if none
|
|---|
| 561 | def effective(file, line, frame):
|
|---|
| 562 | """Determine which breakpoint for this file:line is to be acted upon.
|
|---|
| 563 |
|
|---|
| 564 | Called only if we know there is a bpt at this
|
|---|
| 565 | location. Returns breakpoint that was triggered and a flag
|
|---|
| 566 | that indicates if it is ok to delete a temporary bp.
|
|---|
| 567 |
|
|---|
| 568 | """
|
|---|
| 569 | possibles = Breakpoint.bplist[file,line]
|
|---|
| 570 | for i in range(0, len(possibles)):
|
|---|
| 571 | b = possibles[i]
|
|---|
| 572 | if b.enabled == 0:
|
|---|
| 573 | continue
|
|---|
| 574 | if not checkfuncname(b, frame):
|
|---|
| 575 | continue
|
|---|
| 576 | # Count every hit when bp is enabled
|
|---|
| 577 | b.hits = b.hits + 1
|
|---|
| 578 | if not b.cond:
|
|---|
| 579 | # If unconditional, and ignoring,
|
|---|
| 580 | # go on to next, else break
|
|---|
| 581 | if b.ignore > 0:
|
|---|
| 582 | b.ignore = b.ignore -1
|
|---|
| 583 | continue
|
|---|
| 584 | else:
|
|---|
| 585 | # breakpoint and marker that's ok
|
|---|
| 586 | # to delete if temporary
|
|---|
| 587 | return (b,1)
|
|---|
| 588 | else:
|
|---|
| 589 | # Conditional bp.
|
|---|
| 590 | # Ignore count applies only to those bpt hits where the
|
|---|
| 591 | # condition evaluates to true.
|
|---|
| 592 | try:
|
|---|
| 593 | val = eval(b.cond, frame.f_globals,
|
|---|
| 594 | frame.f_locals)
|
|---|
| 595 | if val:
|
|---|
| 596 | if b.ignore > 0:
|
|---|
| 597 | b.ignore = b.ignore -1
|
|---|
| 598 | # continue
|
|---|
| 599 | else:
|
|---|
| 600 | return (b,1)
|
|---|
| 601 | # else:
|
|---|
| 602 | # continue
|
|---|
| 603 | except:
|
|---|
| 604 | # if eval fails, most conservative
|
|---|
| 605 | # thing is to stop on breakpoint
|
|---|
| 606 | # regardless of ignore count.
|
|---|
| 607 | # Don't delete temporary,
|
|---|
| 608 | # as another hint to user.
|
|---|
| 609 | return (b,0)
|
|---|
| 610 | return (None, None)
|
|---|
| 611 |
|
|---|
| 612 | # -------------------- testing --------------------
|
|---|
| 613 |
|
|---|
| 614 | class Tdb(Bdb):
|
|---|
| 615 | def user_call(self, frame, args):
|
|---|
| 616 | name = frame.f_code.co_name
|
|---|
| 617 | if not name: name = '???'
|
|---|
| 618 | print '+++ call', name, args
|
|---|
| 619 | def user_line(self, frame):
|
|---|
| 620 | import linecache
|
|---|
| 621 | name = frame.f_code.co_name
|
|---|
| 622 | if not name: name = '???'
|
|---|
| 623 | fn = self.canonic(frame.f_code.co_filename)
|
|---|
| 624 | line = linecache.getline(fn, frame.f_lineno, frame.f_globals)
|
|---|
| 625 | print '+++', fn, frame.f_lineno, name, ':', line.strip()
|
|---|
| 626 | def user_return(self, frame, retval):
|
|---|
| 627 | print '+++ return', retval
|
|---|
| 628 | def user_exception(self, frame, exc_stuff):
|
|---|
| 629 | print '+++ exception', exc_stuff
|
|---|
| 630 | self.set_continue()
|
|---|
| 631 |
|
|---|
| 632 | def foo(n):
|
|---|
| 633 | print 'foo(', n, ')'
|
|---|
| 634 | x = bar(n*10)
|
|---|
| 635 | print 'bar returned', x
|
|---|
| 636 |
|
|---|
| 637 | def bar(a):
|
|---|
| 638 | print 'bar(', a, ')'
|
|---|
| 639 | return a/2
|
|---|
| 640 |
|
|---|
| 641 | def test():
|
|---|
| 642 | t = Tdb()
|
|---|
| 643 | t.run('import bdb; bdb.foo(10)')
|
|---|
| 644 |
|
|---|
| 645 | # end
|
|---|
