]>
Commit | Line | Data |
---|---|---|
4710c53d | 1 | """Debugger basics"""\r |
2 | \r | |
3 | import fnmatch\r | |
4 | import sys\r | |
5 | import os\r | |
6 | import types\r | |
7 | \r | |
8 | __all__ = ["BdbQuit","Bdb","Breakpoint"]\r | |
9 | \r | |
10 | class BdbQuit(Exception):\r | |
11 | """Exception to give up completely"""\r | |
12 | \r | |
13 | \r | |
14 | class Bdb:\r | |
15 | \r | |
16 | """Generic Python debugger base class.\r | |
17 | \r | |
18 | This class takes care of details of the trace facility;\r | |
19 | a derived class should implement user interaction.\r | |
20 | The standard debugger class (pdb.Pdb) is an example.\r | |
21 | """\r | |
22 | \r | |
23 | def __init__(self, skip=None):\r | |
24 | self.skip = set(skip) if skip else None\r | |
25 | self.breaks = {}\r | |
26 | self.fncache = {}\r | |
27 | \r | |
28 | def canonic(self, filename):\r | |
29 | if filename == "<" + filename[1:-1] + ">":\r | |
30 | return filename\r | |
31 | canonic = self.fncache.get(filename)\r | |
32 | if not canonic:\r | |
33 | canonic = os.path.abspath(filename)\r | |
34 | canonic = os.path.normcase(canonic)\r | |
35 | self.fncache[filename] = canonic\r | |
36 | return canonic\r | |
37 | \r | |
38 | def reset(self):\r | |
39 | import linecache\r | |
40 | linecache.checkcache()\r | |
41 | self.botframe = None\r | |
42 | self._set_stopinfo(None, None)\r | |
43 | \r | |
44 | def trace_dispatch(self, frame, event, arg):\r | |
45 | if self.quitting:\r | |
46 | return # None\r | |
47 | if event == 'line':\r | |
48 | return self.dispatch_line(frame)\r | |
49 | if event == 'call':\r | |
50 | return self.dispatch_call(frame, arg)\r | |
51 | if event == 'return':\r | |
52 | return self.dispatch_return(frame, arg)\r | |
53 | if event == 'exception':\r | |
54 | return self.dispatch_exception(frame, arg)\r | |
55 | if event == 'c_call':\r | |
56 | return self.trace_dispatch\r | |
57 | if event == 'c_exception':\r | |
58 | return self.trace_dispatch\r | |
59 | if event == 'c_return':\r | |
60 | return self.trace_dispatch\r | |
61 | print 'bdb.Bdb.dispatch: unknown debugging event:', repr(event)\r | |
62 | return self.trace_dispatch\r | |
63 | \r | |
64 | def dispatch_line(self, frame):\r | |
65 | if self.stop_here(frame) or self.break_here(frame):\r | |
66 | self.user_line(frame)\r | |
67 | if self.quitting: raise BdbQuit\r | |
68 | return self.trace_dispatch\r | |
69 | \r | |
70 | def dispatch_call(self, frame, arg):\r | |
71 | # XXX 'arg' is no longer used\r | |
72 | if self.botframe is None:\r | |
73 | # First call of dispatch since reset()\r | |
74 | self.botframe = frame.f_back # (CT) Note that this may also be None!\r | |
75 | return self.trace_dispatch\r | |
76 | if not (self.stop_here(frame) or self.break_anywhere(frame)):\r | |
77 | # No need to trace this function\r | |
78 | return # None\r | |
79 | self.user_call(frame, arg)\r | |
80 | if self.quitting: raise BdbQuit\r | |
81 | return self.trace_dispatch\r | |
82 | \r | |
83 | def dispatch_return(self, frame, arg):\r | |
84 | if self.stop_here(frame) or frame == self.returnframe:\r | |
85 | self.user_return(frame, arg)\r | |
86 | if self.quitting: raise BdbQuit\r | |
87 | return self.trace_dispatch\r | |
88 | \r | |
89 | def dispatch_exception(self, frame, arg):\r | |
90 | if self.stop_here(frame):\r | |
91 | self.user_exception(frame, arg)\r | |
92 | if self.quitting: raise BdbQuit\r | |
93 | return self.trace_dispatch\r | |
94 | \r | |
95 | # Normally derived classes don't override the following\r | |
96 | # methods, but they may if they want to redefine the\r | |
97 | # definition of stopping and breakpoints.\r | |
98 | \r | |
99 | def is_skipped_module(self, module_name):\r | |
100 | for pattern in self.skip:\r | |
101 | if fnmatch.fnmatch(module_name, pattern):\r | |
102 | return True\r | |
103 | return False\r | |
104 | \r | |
105 | def stop_here(self, frame):\r | |
106 | # (CT) stopframe may now also be None, see dispatch_call.\r | |
107 | # (CT) the former test for None is therefore removed from here.\r | |
108 | if self.skip and \\r | |
109 | self.is_skipped_module(frame.f_globals.get('__name__')):\r | |
110 | return False\r | |
111 | if frame is self.stopframe:\r | |
112 | if self.stoplineno == -1:\r | |
113 | return False\r | |
114 | return frame.f_lineno >= self.stoplineno\r | |
115 | while frame is not None and frame is not self.stopframe:\r | |
116 | if frame is self.botframe:\r | |
117 | return True\r | |
118 | frame = frame.f_back\r | |
119 | return False\r | |
120 | \r | |
121 | def break_here(self, frame):\r | |
122 | filename = self.canonic(frame.f_code.co_filename)\r | |
123 | if not filename in self.breaks:\r | |
124 | return False\r | |
125 | lineno = frame.f_lineno\r | |
126 | if not lineno in self.breaks[filename]:\r | |
127 | # The line itself has no breakpoint, but maybe the line is the\r | |
128 | # first line of a function with breakpoint set by function name.\r | |
129 | lineno = frame.f_code.co_firstlineno\r | |
130 | if not lineno in self.breaks[filename]:\r | |
131 | return False\r | |
132 | \r | |
133 | # flag says ok to delete temp. bp\r | |
134 | (bp, flag) = effective(filename, lineno, frame)\r | |
135 | if bp:\r | |
136 | self.currentbp = bp.number\r | |
137 | if (flag and bp.temporary):\r | |
138 | self.do_clear(str(bp.number))\r | |
139 | return True\r | |
140 | else:\r | |
141 | return False\r | |
142 | \r | |
143 | def do_clear(self, arg):\r | |
144 | raise NotImplementedError, "subclass of bdb must implement do_clear()"\r | |
145 | \r | |
146 | def break_anywhere(self, frame):\r | |
147 | return self.canonic(frame.f_code.co_filename) in self.breaks\r | |
148 | \r | |
149 | # Derived classes should override the user_* methods\r | |
150 | # to gain control.\r | |
151 | \r | |
152 | def user_call(self, frame, argument_list):\r | |
153 | """This method is called when there is the remote possibility\r | |
154 | that we ever need to stop in this function."""\r | |
155 | pass\r | |
156 | \r | |
157 | def user_line(self, frame):\r | |
158 | """This method is called when we stop or break at this line."""\r | |
159 | pass\r | |
160 | \r | |
161 | def user_return(self, frame, return_value):\r | |
162 | """This method is called when a return trap is set here."""\r | |
163 | pass\r | |
164 | \r | |
165 | def user_exception(self, frame, exc_info):\r | |
166 | exc_type, exc_value, exc_traceback = exc_info\r | |
167 | """This method is called if an exception occurs,\r | |
168 | but only if we are to stop at or just below this level."""\r | |
169 | pass\r | |
170 | \r | |
171 | def _set_stopinfo(self, stopframe, returnframe, stoplineno=0):\r | |
172 | self.stopframe = stopframe\r | |
173 | self.returnframe = returnframe\r | |
174 | self.quitting = 0\r | |
175 | # stoplineno >= 0 means: stop at line >= the stoplineno\r | |
176 | # stoplineno -1 means: don't stop at all\r | |
177 | self.stoplineno = stoplineno\r | |
178 | \r | |
179 | # Derived classes and clients can call the following methods\r | |
180 | # to affect the stepping state.\r | |
181 | \r | |
182 | def set_until(self, frame): #the name "until" is borrowed from gdb\r | |
183 | """Stop when the line with the line no greater than the current one is\r | |
184 | reached or when returning from current frame"""\r | |
185 | self._set_stopinfo(frame, frame, frame.f_lineno+1)\r | |
186 | \r | |
187 | def set_step(self):\r | |
188 | """Stop after one line of code."""\r | |
189 | self._set_stopinfo(None, None)\r | |
190 | \r | |
191 | def set_next(self, frame):\r | |
192 | """Stop on the next line in or below the given frame."""\r | |
193 | self._set_stopinfo(frame, None)\r | |
194 | \r | |
195 | def set_return(self, frame):\r | |
196 | """Stop when returning from the given frame."""\r | |
197 | self._set_stopinfo(frame.f_back, frame)\r | |
198 | \r | |
199 | def set_trace(self, frame=None):\r | |
200 | """Start debugging from `frame`.\r | |
201 | \r | |
202 | If frame is not specified, debugging starts from caller's frame.\r | |
203 | """\r | |
204 | if frame is None:\r | |
205 | frame = sys._getframe().f_back\r | |
206 | self.reset()\r | |
207 | while frame:\r | |
208 | frame.f_trace = self.trace_dispatch\r | |
209 | self.botframe = frame\r | |
210 | frame = frame.f_back\r | |
211 | self.set_step()\r | |
212 | sys.settrace(self.trace_dispatch)\r | |
213 | \r | |
214 | def set_continue(self):\r | |
215 | # Don't stop except at breakpoints or when finished\r | |
216 | self._set_stopinfo(self.botframe, None, -1)\r | |
217 | if not self.breaks:\r | |
218 | # no breakpoints; run without debugger overhead\r | |
219 | sys.settrace(None)\r | |
220 | frame = sys._getframe().f_back\r | |
221 | while frame and frame is not self.botframe:\r | |
222 | del frame.f_trace\r | |
223 | frame = frame.f_back\r | |
224 | \r | |
225 | def set_quit(self):\r | |
226 | self.stopframe = self.botframe\r | |
227 | self.returnframe = None\r | |
228 | self.quitting = 1\r | |
229 | sys.settrace(None)\r | |
230 | \r | |
231 | # Derived classes and clients can call the following methods\r | |
232 | # to manipulate breakpoints. These methods return an\r | |
233 | # error message is something went wrong, None if all is well.\r | |
234 | # Set_break prints out the breakpoint line and file:lineno.\r | |
235 | # Call self.get_*break*() to see the breakpoints or better\r | |
236 | # for bp in Breakpoint.bpbynumber: if bp: bp.bpprint().\r | |
237 | \r | |
238 | def set_break(self, filename, lineno, temporary=0, cond = None,\r | |
239 | funcname=None):\r | |
240 | filename = self.canonic(filename)\r | |
241 | import linecache # Import as late as possible\r | |
242 | line = linecache.getline(filename, lineno)\r | |
243 | if not line:\r | |
244 | return 'Line %s:%d does not exist' % (filename,\r | |
245 | lineno)\r | |
246 | if not filename in self.breaks:\r | |
247 | self.breaks[filename] = []\r | |
248 | list = self.breaks[filename]\r | |
249 | if not lineno in list:\r | |
250 | list.append(lineno)\r | |
251 | bp = Breakpoint(filename, lineno, temporary, cond, funcname)\r | |
252 | \r | |
253 | def _prune_breaks(self, filename, lineno):\r | |
254 | if (filename, lineno) not in Breakpoint.bplist:\r | |
255 | self.breaks[filename].remove(lineno)\r | |
256 | if not self.breaks[filename]:\r | |
257 | del self.breaks[filename]\r | |
258 | \r | |
259 | def clear_break(self, filename, lineno):\r | |
260 | filename = self.canonic(filename)\r | |
261 | if not filename in self.breaks:\r | |
262 | return 'There are no breakpoints in %s' % filename\r | |
263 | if lineno not in self.breaks[filename]:\r | |
264 | return 'There is no breakpoint at %s:%d' % (filename,\r | |
265 | lineno)\r | |
266 | # If there's only one bp in the list for that file,line\r | |
267 | # pair, then remove the breaks entry\r | |
268 | for bp in Breakpoint.bplist[filename, lineno][:]:\r | |
269 | bp.deleteMe()\r | |
270 | self._prune_breaks(filename, lineno)\r | |
271 | \r | |
272 | def clear_bpbynumber(self, arg):\r | |
273 | try:\r | |
274 | number = int(arg)\r | |
275 | except:\r | |
276 | return 'Non-numeric breakpoint number (%s)' % arg\r | |
277 | try:\r | |
278 | bp = Breakpoint.bpbynumber[number]\r | |
279 | except IndexError:\r | |
280 | return 'Breakpoint number (%d) out of range' % number\r | |
281 | if not bp:\r | |
282 | return 'Breakpoint (%d) already deleted' % number\r | |
283 | bp.deleteMe()\r | |
284 | self._prune_breaks(bp.file, bp.line)\r | |
285 | \r | |
286 | def clear_all_file_breaks(self, filename):\r | |
287 | filename = self.canonic(filename)\r | |
288 | if not filename in self.breaks:\r | |
289 | return 'There are no breakpoints in %s' % filename\r | |
290 | for line in self.breaks[filename]:\r | |
291 | blist = Breakpoint.bplist[filename, line]\r | |
292 | for bp in blist:\r | |
293 | bp.deleteMe()\r | |
294 | del self.breaks[filename]\r | |
295 | \r | |
296 | def clear_all_breaks(self):\r | |
297 | if not self.breaks:\r | |
298 | return 'There are no breakpoints'\r | |
299 | for bp in Breakpoint.bpbynumber:\r | |
300 | if bp:\r | |
301 | bp.deleteMe()\r | |
302 | self.breaks = {}\r | |
303 | \r | |
304 | def get_break(self, filename, lineno):\r | |
305 | filename = self.canonic(filename)\r | |
306 | return filename in self.breaks and \\r | |
307 | lineno in self.breaks[filename]\r | |
308 | \r | |
309 | def get_breaks(self, filename, lineno):\r | |
310 | filename = self.canonic(filename)\r | |
311 | return filename in self.breaks and \\r | |
312 | lineno in self.breaks[filename] and \\r | |
313 | Breakpoint.bplist[filename, lineno] or []\r | |
314 | \r | |
315 | def get_file_breaks(self, filename):\r | |
316 | filename = self.canonic(filename)\r | |
317 | if filename in self.breaks:\r | |
318 | return self.breaks[filename]\r | |
319 | else:\r | |
320 | return []\r | |
321 | \r | |
322 | def get_all_breaks(self):\r | |
323 | return self.breaks\r | |
324 | \r | |
325 | # Derived classes and clients can call the following method\r | |
326 | # to get a data structure representing a stack trace.\r | |
327 | \r | |
328 | def get_stack(self, f, t):\r | |
329 | stack = []\r | |
330 | if t and t.tb_frame is f:\r | |
331 | t = t.tb_next\r | |
332 | while f is not None:\r | |
333 | stack.append((f, f.f_lineno))\r | |
334 | if f is self.botframe:\r | |
335 | break\r | |
336 | f = f.f_back\r | |
337 | stack.reverse()\r | |
338 | i = max(0, len(stack) - 1)\r | |
339 | while t is not None:\r | |
340 | stack.append((t.tb_frame, t.tb_lineno))\r | |
341 | t = t.tb_next\r | |
342 | if f is None:\r | |
343 | i = max(0, len(stack) - 1)\r | |
344 | return stack, i\r | |
345 | \r | |
346 | #\r | |
347 | \r | |
348 | def format_stack_entry(self, frame_lineno, lprefix=': '):\r | |
349 | import linecache, repr\r | |
350 | frame, lineno = frame_lineno\r | |
351 | filename = self.canonic(frame.f_code.co_filename)\r | |
352 | s = '%s(%r)' % (filename, lineno)\r | |
353 | if frame.f_code.co_name:\r | |
354 | s = s + frame.f_code.co_name\r | |
355 | else:\r | |
356 | s = s + "<lambda>"\r | |
357 | if '__args__' in frame.f_locals:\r | |
358 | args = frame.f_locals['__args__']\r | |
359 | else:\r | |
360 | args = None\r | |
361 | if args:\r | |
362 | s = s + repr.repr(args)\r | |
363 | else:\r | |
364 | s = s + '()'\r | |
365 | if '__return__' in frame.f_locals:\r | |
366 | rv = frame.f_locals['__return__']\r | |
367 | s = s + '->'\r | |
368 | s = s + repr.repr(rv)\r | |
369 | line = linecache.getline(filename, lineno, frame.f_globals)\r | |
370 | if line: s = s + lprefix + line.strip()\r | |
371 | return s\r | |
372 | \r | |
373 | # The following two methods can be called by clients to use\r | |
374 | # a debugger to debug a statement, given as a string.\r | |
375 | \r | |
376 | def run(self, cmd, globals=None, locals=None):\r | |
377 | if globals is None:\r | |
378 | import __main__\r | |
379 | globals = __main__.__dict__\r | |
380 | if locals is None:\r | |
381 | locals = globals\r | |
382 | self.reset()\r | |
383 | sys.settrace(self.trace_dispatch)\r | |
384 | if not isinstance(cmd, types.CodeType):\r | |
385 | cmd = cmd+'\n'\r | |
386 | try:\r | |
387 | exec cmd in globals, locals\r | |
388 | except BdbQuit:\r | |
389 | pass\r | |
390 | finally:\r | |
391 | self.quitting = 1\r | |
392 | sys.settrace(None)\r | |
393 | \r | |
394 | def runeval(self, expr, globals=None, locals=None):\r | |
395 | if globals is None:\r | |
396 | import __main__\r | |
397 | globals = __main__.__dict__\r | |
398 | if locals is None:\r | |
399 | locals = globals\r | |
400 | self.reset()\r | |
401 | sys.settrace(self.trace_dispatch)\r | |
402 | if not isinstance(expr, types.CodeType):\r | |
403 | expr = expr+'\n'\r | |
404 | try:\r | |
405 | return eval(expr, globals, locals)\r | |
406 | except BdbQuit:\r | |
407 | pass\r | |
408 | finally:\r | |
409 | self.quitting = 1\r | |
410 | sys.settrace(None)\r | |
411 | \r | |
412 | def runctx(self, cmd, globals, locals):\r | |
413 | # B/W compatibility\r | |
414 | self.run(cmd, globals, locals)\r | |
415 | \r | |
416 | # This method is more useful to debug a single function call.\r | |
417 | \r | |
418 | def runcall(self, func, *args, **kwds):\r | |
419 | self.reset()\r | |
420 | sys.settrace(self.trace_dispatch)\r | |
421 | res = None\r | |
422 | try:\r | |
423 | res = func(*args, **kwds)\r | |
424 | except BdbQuit:\r | |
425 | pass\r | |
426 | finally:\r | |
427 | self.quitting = 1\r | |
428 | sys.settrace(None)\r | |
429 | return res\r | |
430 | \r | |
431 | \r | |
432 | def set_trace():\r | |
433 | Bdb().set_trace()\r | |
434 | \r | |
435 | \r | |
436 | class Breakpoint:\r | |
437 | \r | |
438 | """Breakpoint class\r | |
439 | \r | |
440 | Implements temporary breakpoints, ignore counts, disabling and\r | |
441 | (re)-enabling, and conditionals.\r | |
442 | \r | |
443 | Breakpoints are indexed by number through bpbynumber and by\r | |
444 | the file,line tuple using bplist. The former points to a\r | |
445 | single instance of class Breakpoint. The latter points to a\r | |
446 | list of such instances since there may be more than one\r | |
447 | breakpoint per line.\r | |
448 | \r | |
449 | """\r | |
450 | \r | |
451 | # XXX Keeping state in the class is a mistake -- this means\r | |
452 | # you cannot have more than one active Bdb instance.\r | |
453 | \r | |
454 | next = 1 # Next bp to be assigned\r | |
455 | bplist = {} # indexed by (file, lineno) tuple\r | |
456 | bpbynumber = [None] # Each entry is None or an instance of Bpt\r | |
457 | # index 0 is unused, except for marking an\r | |
458 | # effective break .... see effective()\r | |
459 | \r | |
460 | def __init__(self, file, line, temporary=0, cond=None, funcname=None):\r | |
461 | self.funcname = funcname\r | |
462 | # Needed if funcname is not None.\r | |
463 | self.func_first_executable_line = None\r | |
464 | self.file = file # This better be in canonical form!\r | |
465 | self.line = line\r | |
466 | self.temporary = temporary\r | |
467 | self.cond = cond\r | |
468 | self.enabled = 1\r | |
469 | self.ignore = 0\r | |
470 | self.hits = 0\r | |
471 | self.number = Breakpoint.next\r | |
472 | Breakpoint.next = Breakpoint.next + 1\r | |
473 | # Build the two lists\r | |
474 | self.bpbynumber.append(self)\r | |
475 | if (file, line) in self.bplist:\r | |
476 | self.bplist[file, line].append(self)\r | |
477 | else:\r | |
478 | self.bplist[file, line] = [self]\r | |
479 | \r | |
480 | \r | |
481 | def deleteMe(self):\r | |
482 | index = (self.file, self.line)\r | |
483 | self.bpbynumber[self.number] = None # No longer in list\r | |
484 | self.bplist[index].remove(self)\r | |
485 | if not self.bplist[index]:\r | |
486 | # No more bp for this f:l combo\r | |
487 | del self.bplist[index]\r | |
488 | \r | |
489 | def enable(self):\r | |
490 | self.enabled = 1\r | |
491 | \r | |
492 | def disable(self):\r | |
493 | self.enabled = 0\r | |
494 | \r | |
495 | def bpprint(self, out=None):\r | |
496 | if out is None:\r | |
497 | out = sys.stdout\r | |
498 | if self.temporary:\r | |
499 | disp = 'del '\r | |
500 | else:\r | |
501 | disp = 'keep '\r | |
502 | if self.enabled:\r | |
503 | disp = disp + 'yes '\r | |
504 | else:\r | |
505 | disp = disp + 'no '\r | |
506 | print >>out, '%-4dbreakpoint %s at %s:%d' % (self.number, disp,\r | |
507 | self.file, self.line)\r | |
508 | if self.cond:\r | |
509 | print >>out, '\tstop only if %s' % (self.cond,)\r | |
510 | if self.ignore:\r | |
511 | print >>out, '\tignore next %d hits' % (self.ignore)\r | |
512 | if (self.hits):\r | |
513 | if (self.hits > 1): ss = 's'\r | |
514 | else: ss = ''\r | |
515 | print >>out, ('\tbreakpoint already hit %d time%s' %\r | |
516 | (self.hits, ss))\r | |
517 | \r | |
518 | # -----------end of Breakpoint class----------\r | |
519 | \r | |
520 | def checkfuncname(b, frame):\r | |
521 | """Check whether we should break here because of `b.funcname`."""\r | |
522 | if not b.funcname:\r | |
523 | # Breakpoint was set via line number.\r | |
524 | if b.line != frame.f_lineno:\r | |
525 | # Breakpoint was set at a line with a def statement and the function\r | |
526 | # defined is called: don't break.\r | |
527 | return False\r | |
528 | return True\r | |
529 | \r | |
530 | # Breakpoint set via function name.\r | |
531 | \r | |
532 | if frame.f_code.co_name != b.funcname:\r | |
533 | # It's not a function call, but rather execution of def statement.\r | |
534 | return False\r | |
535 | \r | |
536 | # We are in the right frame.\r | |
537 | if not b.func_first_executable_line:\r | |
538 | # The function is entered for the 1st time.\r | |
539 | b.func_first_executable_line = frame.f_lineno\r | |
540 | \r | |
541 | if b.func_first_executable_line != frame.f_lineno:\r | |
542 | # But we are not at the first line number: don't break.\r | |
543 | return False\r | |
544 | return True\r | |
545 | \r | |
546 | # Determines if there is an effective (active) breakpoint at this\r | |
547 | # line of code. Returns breakpoint number or 0 if none\r | |
548 | def effective(file, line, frame):\r | |
549 | """Determine which breakpoint for this file:line is to be acted upon.\r | |
550 | \r | |
551 | Called only if we know there is a bpt at this\r | |
552 | location. Returns breakpoint that was triggered and a flag\r | |
553 | that indicates if it is ok to delete a temporary bp.\r | |
554 | \r | |
555 | """\r | |
556 | possibles = Breakpoint.bplist[file,line]\r | |
557 | for i in range(0, len(possibles)):\r | |
558 | b = possibles[i]\r | |
559 | if b.enabled == 0:\r | |
560 | continue\r | |
561 | if not checkfuncname(b, frame):\r | |
562 | continue\r | |
563 | # Count every hit when bp is enabled\r | |
564 | b.hits = b.hits + 1\r | |
565 | if not b.cond:\r | |
566 | # If unconditional, and ignoring,\r | |
567 | # go on to next, else break\r | |
568 | if b.ignore > 0:\r | |
569 | b.ignore = b.ignore -1\r | |
570 | continue\r | |
571 | else:\r | |
572 | # breakpoint and marker that's ok\r | |
573 | # to delete if temporary\r | |
574 | return (b,1)\r | |
575 | else:\r | |
576 | # Conditional bp.\r | |
577 | # Ignore count applies only to those bpt hits where the\r | |
578 | # condition evaluates to true.\r | |
579 | try:\r | |
580 | val = eval(b.cond, frame.f_globals,\r | |
581 | frame.f_locals)\r | |
582 | if val:\r | |
583 | if b.ignore > 0:\r | |
584 | b.ignore = b.ignore -1\r | |
585 | # continue\r | |
586 | else:\r | |
587 | return (b,1)\r | |
588 | # else:\r | |
589 | # continue\r | |
590 | except:\r | |
591 | # if eval fails, most conservative\r | |
592 | # thing is to stop on breakpoint\r | |
593 | # regardless of ignore count.\r | |
594 | # Don't delete temporary,\r | |
595 | # as another hint to user.\r | |
596 | return (b,0)\r | |
597 | return (None, None)\r | |
598 | \r | |
599 | # -------------------- testing --------------------\r | |
600 | \r | |
601 | class Tdb(Bdb):\r | |
602 | def user_call(self, frame, args):\r | |
603 | name = frame.f_code.co_name\r | |
604 | if not name: name = '???'\r | |
605 | print '+++ call', name, args\r | |
606 | def user_line(self, frame):\r | |
607 | import linecache\r | |
608 | name = frame.f_code.co_name\r | |
609 | if not name: name = '???'\r | |
610 | fn = self.canonic(frame.f_code.co_filename)\r | |
611 | line = linecache.getline(fn, frame.f_lineno, frame.f_globals)\r | |
612 | print '+++', fn, frame.f_lineno, name, ':', line.strip()\r | |
613 | def user_return(self, frame, retval):\r | |
614 | print '+++ return', retval\r | |
615 | def user_exception(self, frame, exc_stuff):\r | |
616 | print '+++ exception', exc_stuff\r | |
617 | self.set_continue()\r | |
618 | \r | |
619 | def foo(n):\r | |
620 | print 'foo(', n, ')'\r | |
621 | x = bar(n*10)\r | |
622 | print 'bar returned', x\r | |
623 | \r | |
624 | def bar(a):\r | |
625 | print 'bar(', a, ')'\r | |
626 | return a/2\r | |
627 | \r | |
628 | def test():\r | |
629 | t = Tdb()\r | |
630 | t.run('import bdb; bdb.foo(10)')\r | |
631 | \r | |
632 | # end\r |