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