Mercurial Repositories > eric / file comparison
comparison: eric7/DebugClients/Python/DebugBase.py
eric7/DebugClients/Python/DebugBase.py
- branch
- eric7
- changeset 8312
- 800c432b34c8
- parent 8257
- 28146736bbfc
- child 8444
- 88b242eba71b
equal
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| 8311:4e8b98454baa | 8312:800c432b34c8 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2002 - 2021 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the debug base class which based originally on bdb. | |
| 8 """ | |
| 9 | |
| 10 import sys | |
| 11 import os | |
| 12 import types | |
| 13 import atexit | |
| 14 import inspect | |
| 15 import ctypes | |
| 16 import time | |
| 17 import dis | |
| 18 import contextlib | |
| 19 | |
| 20 from BreakpointWatch import Breakpoint, Watch | |
| 21 | |
| 22 import _thread | |
| 23 from DebugUtilities import getargvalues, formatargvalues | |
| 24 | |
| 25 gRecursionLimit = 64 | |
| 26 | |
| 27 try: | |
| 28 GENERATOR_AND_COROUTINE_FLAGS = ( | |
| 29 inspect.CO_GENERATOR | inspect.CO_COROUTINE | | |
| 30 inspect.CO_ASYNC_GENERATOR | |
| 31 ) | |
| 32 except AttributeError: | |
| 33 # Python < 3.7 | |
| 34 GENERATOR_AND_COROUTINE_FLAGS = inspect.CO_GENERATOR | |
| 35 | |
| 36 | |
| 37 def printerr(s): | |
| 38 """ | |
| 39 Module function used for debugging the debug client. | |
| 40 | |
| 41 @param s data to be printed | |
| 42 """ | |
| 43 sys.__stderr__.write('{0!s}\n'.format(s)) | |
| 44 sys.__stderr__.flush() | |
| 45 | |
| 46 | |
| 47 def setRecursionLimit(limit): | |
| 48 """ | |
| 49 Module function to set the recursion limit. | |
| 50 | |
| 51 @param limit recursion limit (integer) | |
| 52 """ | |
| 53 global gRecursionLimit | |
| 54 gRecursionLimit = limit | |
| 55 | |
| 56 | |
| 57 class DebugBase: | |
| 58 """ | |
| 59 Class implementing base class of the debugger. | |
| 60 | |
| 61 Provides methods for the 'owning' client to call to step etc. | |
| 62 """ | |
| 63 # Don't thrust distutils.sysconfig.get_python_lib: possible case mismatch | |
| 64 # on Windows | |
| 65 lib = os.path.dirname(inspect.__file__) | |
| 66 # tuple required because it's accessed a lot of times by startswith method | |
| 67 pathsToSkip = ('<', os.path.dirname(__file__), inspect.__file__[:-1]) | |
| 68 filesToSkip = {} | |
| 69 | |
| 70 # cache for fixed file names | |
| 71 _fnCache = {} | |
| 72 | |
| 73 # Stop all timers, when greenlets are used | |
| 74 pollTimerEnabled = True | |
| 75 | |
| 76 def __init__(self, dbgClient): | |
| 77 """ | |
| 78 Constructor | |
| 79 | |
| 80 @param dbgClient the owning client | |
| 81 """ | |
| 82 self._dbgClient = dbgClient | |
| 83 | |
| 84 # Some informations about the thread | |
| 85 self.isMainThread = False | |
| 86 self.quitting = False | |
| 87 self.id = -1 | |
| 88 self.name = '' | |
| 89 | |
| 90 self.tracePythonLibs(0) | |
| 91 | |
| 92 # Special handling of a recursion error | |
| 93 self.skipFrames = 0 | |
| 94 | |
| 95 self.isBroken = False | |
| 96 self.isException = False | |
| 97 self.cFrame = None | |
| 98 | |
| 99 # current frame we are at | |
| 100 self.currentFrame = None | |
| 101 | |
| 102 # frames, where we want to stop or release debugger | |
| 103 self.stopframe = None | |
| 104 self.returnframe = None | |
| 105 self.stop_everywhere = False | |
| 106 | |
| 107 self.__recursionDepth = -1 | |
| 108 self.setRecursionDepth(inspect.currentframe()) | |
| 109 | |
| 110 # background task to periodicaly check for client interactions | |
| 111 self.eventPollFlag = False | |
| 112 self.timer = _thread.start_new_thread(self.__eventPollTimer, ()) | |
| 113 | |
| 114 # provide a hook to perform a hard breakpoint | |
| 115 # Use it like this: | |
| 116 # if hasattr(sys, 'breakpoint): sys.breakpoint() | |
| 117 sys.breakpoint = self.set_trace | |
| 118 if sys.version_info >= (3, 7): | |
| 119 sys.breakpointhook = self.set_trace | |
| 120 | |
| 121 def __eventPollTimer(self): | |
| 122 """ | |
| 123 Private method to set a flag every 0.5 s to check for new messages. | |
| 124 """ | |
| 125 while DebugBase.pollTimerEnabled: | |
| 126 time.sleep(0.5) | |
| 127 self.eventPollFlag = True | |
| 128 | |
| 129 self.eventPollFlag = False | |
| 130 | |
| 131 def getCurrentFrame(self): | |
| 132 """ | |
| 133 Public method to return the current frame. | |
| 134 | |
| 135 @return the current frame | |
| 136 @rtype frame object | |
| 137 """ | |
| 138 # Don't show any local frames after the program was stopped | |
| 139 if self.quitting: | |
| 140 return None | |
| 141 | |
| 142 return self.currentFrame | |
| 143 | |
| 144 def getFrameLocals(self, frmnr=0): | |
| 145 """ | |
| 146 Public method to return the locals dictionary of the current frame | |
| 147 or a frame below. | |
| 148 | |
| 149 @param frmnr distance of frame to get locals dictionary of. 0 is | |
| 150 the current frame (int) | |
| 151 @return locals dictionary of the frame | |
| 152 """ | |
| 153 f = self.currentFrame | |
| 154 while f is not None and frmnr > 0: | |
| 155 f = f.f_back | |
| 156 frmnr -= 1 | |
| 157 return f.f_locals | |
| 158 | |
| 159 def storeFrameLocals(self, frmnr=0): | |
| 160 """ | |
| 161 Public method to store the locals into the frame, so an access to | |
| 162 frame.f_locals returns the last data. | |
| 163 | |
| 164 @param frmnr distance of frame to store locals dictionary to. 0 is | |
| 165 the current frame (int) | |
| 166 """ | |
| 167 cf = self.currentFrame | |
| 168 while cf is not None and frmnr > 0: | |
| 169 cf = cf.f_back | |
| 170 frmnr -= 1 | |
| 171 | |
| 172 with contextlib.suppress(Exception): | |
| 173 if "__pypy__" in sys.builtin_module_names: | |
| 174 import __pypy__ | |
| 175 __pypy__.locals_to_fast(cf) | |
| 176 return | |
| 177 | |
| 178 ctypes.pythonapi.PyFrame_LocalsToFast( | |
| 179 ctypes.py_object(cf), | |
| 180 ctypes.c_int(0)) | |
| 181 | |
| 182 def step(self, traceMode): | |
| 183 """ | |
| 184 Public method to perform a step operation in this thread. | |
| 185 | |
| 186 @param traceMode If it is True, then the step is a step into, | |
| 187 otherwise it is a step over. | |
| 188 """ | |
| 189 if traceMode: | |
| 190 self.set_step() | |
| 191 else: | |
| 192 self.set_next(self.currentFrame) | |
| 193 | |
| 194 def stepOut(self): | |
| 195 """ | |
| 196 Public method to perform a step out of the current call. | |
| 197 """ | |
| 198 self.set_return(self.currentFrame) | |
| 199 | |
| 200 def go(self, special): | |
| 201 """ | |
| 202 Public method to resume the thread. | |
| 203 | |
| 204 It resumes the thread stopping only at breakpoints or exceptions. | |
| 205 | |
| 206 @param special flag indicating a special continue operation | |
| 207 """ | |
| 208 self.set_continue(special) | |
| 209 | |
| 210 def setRecursionDepth(self, frame): | |
| 211 """ | |
| 212 Public method to determine the current recursion depth. | |
| 213 | |
| 214 @param frame The current stack frame. | |
| 215 """ | |
| 216 self.__recursionDepth = 0 | |
| 217 while frame is not None: | |
| 218 self.__recursionDepth += 1 | |
| 219 frame = frame.f_back | |
| 220 | |
| 221 def profileWithRecursion(self, frame, event, arg): | |
| 222 """ | |
| 223 Public method used to trace some stuff independent of the debugger | |
| 224 trace function. | |
| 225 | |
| 226 @param frame current stack frame | |
| 227 @type frame object | |
| 228 @param event trace event | |
| 229 @type str | |
| 230 @param arg arguments | |
| 231 @type depends on the previous event parameter | |
| 232 @exception RuntimeError raised to indicate too many recursions | |
| 233 """ | |
| 234 if event == 'return': | |
| 235 self.cFrame = frame.f_back | |
| 236 self.__recursionDepth -= 1 | |
| 237 if self._dbgClient.callTraceEnabled: | |
| 238 self.__sendCallTrace(event, frame, self.cFrame) | |
| 239 elif event == 'call': | |
| 240 if self._dbgClient.callTraceEnabled: | |
| 241 self.__sendCallTrace(event, self.cFrame, frame) | |
| 242 self.cFrame = frame | |
| 243 self.__recursionDepth += 1 | |
| 244 if self.__recursionDepth > gRecursionLimit: | |
| 245 raise RuntimeError( | |
| 246 'maximum recursion depth exceeded\n' | |
| 247 '(offending frame is two down the stack)') | |
| 248 | |
| 249 def profile(self, frame, event, arg): | |
| 250 """ | |
| 251 Public method used to trace some stuff independent of the debugger | |
| 252 trace function. | |
| 253 | |
| 254 @param frame current stack frame | |
| 255 @type frame object | |
| 256 @param event trace event | |
| 257 @type str | |
| 258 @param arg arguments | |
| 259 @type depends on the previous event parameter | |
| 260 """ | |
| 261 if event == 'return': | |
| 262 self.__sendCallTrace(event, frame, frame.f_back) | |
| 263 elif event == 'call': | |
| 264 self.__sendCallTrace(event, frame.f_back, frame) | |
| 265 | |
| 266 def __sendCallTrace(self, event, fromFrame, toFrame): | |
| 267 """ | |
| 268 Private method to send a call/return trace. | |
| 269 | |
| 270 @param event trace event | |
| 271 @type str | |
| 272 @param fromFrame originating frame | |
| 273 @type frame object | |
| 274 @param toFrame destination frame | |
| 275 @type frame object | |
| 276 """ | |
| 277 if not self.__skipFrame(fromFrame) and not self.__skipFrame(toFrame): | |
| 278 fromInfo = { | |
| 279 "filename": self._dbgClient.absPath( | |
| 280 self.fix_frame_filename(fromFrame)), | |
| 281 "linenumber": fromFrame.f_lineno, | |
| 282 "codename": fromFrame.f_code.co_name, | |
| 283 } | |
| 284 toInfo = { | |
| 285 "filename": self._dbgClient.absPath( | |
| 286 self.fix_frame_filename(toFrame)), | |
| 287 "linenumber": toFrame.f_lineno, | |
| 288 "codename": toFrame.f_code.co_name, | |
| 289 } | |
| 290 self._dbgClient.sendCallTrace(event, fromInfo, toInfo) | |
| 291 | |
| 292 def trace_dispatch(self, frame, event, arg): | |
| 293 """ | |
| 294 Public method reimplemented from bdb.py to do some special things. | |
| 295 | |
| 296 This specialty is to check the connection to the debug server | |
| 297 for new events (i.e. new breakpoints) while we are going through | |
| 298 the code. | |
| 299 | |
| 300 @param frame The current stack frame | |
| 301 @type frame object | |
| 302 @param event The trace event | |
| 303 @type str | |
| 304 @param arg The arguments | |
| 305 @type depends on the previous event parameter | |
| 306 @return local trace function | |
| 307 @rtype trace function or None | |
| 308 @exception SystemExit | |
| 309 """ | |
| 310 # give the client a chance to push through new break points. | |
| 311 if self.eventPollFlag: | |
| 312 self._dbgClient.eventPoll() | |
| 313 self.eventPollFlag = False | |
| 314 | |
| 315 if self.quitting: | |
| 316 raise SystemExit | |
| 317 | |
| 318 if event == 'line': | |
| 319 if self.stop_here(frame) or self.break_here(frame): | |
| 320 if ( | |
| 321 self.stop_everywhere and | |
| 322 frame.f_back and | |
| 323 frame.f_back.f_code.co_name == "prepareJsonCommand" | |
| 324 ): | |
| 325 # Just stepped into print statement, so skip these frames | |
| 326 self._set_stopinfo(None, frame.f_back) | |
| 327 else: | |
| 328 self.user_line(frame) | |
| 329 return self.trace_dispatch | |
| 330 | |
| 331 if event == 'call': | |
| 332 if ( | |
| 333 self.stop_here(frame) or | |
| 334 self.__checkBreakInFrame(frame) or | |
| 335 Watch.watches != [] | |
| 336 ) or ( | |
| 337 self.stopframe and | |
| 338 frame.f_code.co_flags & GENERATOR_AND_COROUTINE_FLAGS | |
| 339 ): | |
| 340 return self.trace_dispatch | |
| 341 else: | |
| 342 # No need to trace this function | |
| 343 return None | |
| 344 | |
| 345 if event == 'return': | |
| 346 if self.stop_here(frame) or frame == self.returnframe: | |
| 347 # Ignore return events in generator except when stepping. | |
| 348 if ( | |
| 349 self.stopframe and | |
| 350 frame.f_code.co_flags & GENERATOR_AND_COROUTINE_FLAGS | |
| 351 ): | |
| 352 return self.trace_dispatch | |
| 353 # Only true if we didn't stop in this frame, because it's | |
| 354 # belonging to the eric debugger. | |
| 355 if self.stopframe is frame and self.stoplineno != -1: | |
| 356 self._set_stopinfo(None, frame.f_back) | |
| 357 return None | |
| 358 | |
| 359 if event == 'exception': | |
| 360 if not self.__skipFrame(frame): | |
| 361 # When stepping with next/until/return in a generator frame, | |
| 362 # skip the internal StopIteration exception (with no traceback) | |
| 363 # triggered by a subiterator run with the 'yield from' | |
| 364 # statement. | |
| 365 if not ( | |
| 366 frame.f_code.co_flags & GENERATOR_AND_COROUTINE_FLAGS and | |
| 367 arg[0] is StopIteration and | |
| 368 arg[2] is None | |
| 369 ): | |
| 370 self.user_exception(arg) | |
| 371 # Stop at the StopIteration or GeneratorExit exception when the | |
| 372 # user has set stopframe in a generator by issuing a return | |
| 373 # command, or a next/until command at the last statement in the | |
| 374 # generator before the exception. | |
| 375 elif ( | |
| 376 self.stopframe and | |
| 377 frame is not self.stopframe and | |
| 378 (self.stopframe.f_code.co_flags & | |
| 379 GENERATOR_AND_COROUTINE_FLAGS) and | |
| 380 arg[0] in (StopIteration, GeneratorExit) | |
| 381 ): | |
| 382 self.user_exception(arg) | |
| 383 return None | |
| 384 | |
| 385 if event == 'c_call': | |
| 386 return None | |
| 387 if event == 'c_exception': | |
| 388 return None | |
| 389 if event == 'c_return': | |
| 390 return None | |
| 391 | |
| 392 print('DebugBase.trace_dispatch:' # __IGNORE_WARNING_M801__ | |
| 393 ' unknown debugging event: ', | |
| 394 repr(event)) | |
| 395 | |
| 396 return self.trace_dispatch | |
| 397 | |
| 398 def set_trace(self, frame=None): | |
| 399 """ | |
| 400 Public method to start debugging from 'frame'. | |
| 401 | |
| 402 If frame is not specified, debugging starts from caller's frame. | |
| 403 Because of jump optimizations it's not possible to use sys.breakpoint() | |
| 404 as last instruction in a function or method. | |
| 405 | |
| 406 @param frame frame to start debugging from | |
| 407 @type frame object | |
| 408 """ | |
| 409 if frame is None: | |
| 410 frame = sys._getframe().f_back # Skip set_trace method | |
| 411 | |
| 412 stopOnHandleCommand = self._dbgClient.handleJsonCommand.__code__ | |
| 413 | |
| 414 frame.f_trace = self.trace_dispatch | |
| 415 while frame.f_back is not None: | |
| 416 # stop at eric's debugger frame or a threading bootstrap | |
| 417 if frame.f_back.f_code == stopOnHandleCommand: | |
| 418 frame.f_trace = self.trace_dispatch | |
| 419 break | |
| 420 | |
| 421 frame = frame.f_back | |
| 422 | |
| 423 self.stop_everywhere = True | |
| 424 sys.settrace(self.trace_dispatch) | |
| 425 sys.setprofile(self._dbgClient.callTraceEnabled) | |
| 426 | |
| 427 def bootstrap(self, target, args, kwargs): | |
| 428 """ | |
| 429 Public method to bootstrap a thread. | |
| 430 | |
| 431 It wraps the call to the user function to enable tracing | |
| 432 before hand. | |
| 433 | |
| 434 @param target function which is called in the new created thread | |
| 435 @type function pointer | |
| 436 @param args arguments to pass to target | |
| 437 @type tuple | |
| 438 @param kwargs keyword arguments to pass to target | |
| 439 @type dict | |
| 440 """ | |
| 441 try: | |
| 442 # Because in the initial run method the "base debug" function is | |
| 443 # set up, it's also valid for the threads afterwards. | |
| 444 sys.settrace(self.trace_dispatch) | |
| 445 | |
| 446 target(*args, **kwargs) | |
| 447 except Exception: | |
| 448 excinfo = sys.exc_info() | |
| 449 self.user_exception(excinfo, True) | |
| 450 finally: | |
| 451 sys.settrace(None) | |
| 452 sys.setprofile(None) | |
| 453 | |
| 454 def run(self, cmd, globalsDict=None, localsDict=None, debug=True, | |
| 455 closeSession=True): | |
| 456 """ | |
| 457 Public method to start a given command under debugger control. | |
| 458 | |
| 459 @param cmd command / code to execute under debugger control | |
| 460 @type str or CodeType | |
| 461 @param globalsDict dictionary of global variables for cmd | |
| 462 @type dict | |
| 463 @param localsDict dictionary of local variables for cmd | |
| 464 @type dict | |
| 465 @param debug flag if command should run under debugger control | |
| 466 @type bool | |
| 467 @return exit code of the program | |
| 468 @rtype int | |
| 469 @param closeSession flag indicating to close the debugger session | |
| 470 at exit | |
| 471 @type bool | |
| 472 """ | |
| 473 if globalsDict is None: | |
| 474 import __main__ | |
| 475 globalsDict = __main__.__dict__ | |
| 476 | |
| 477 if localsDict is None: | |
| 478 localsDict = globalsDict | |
| 479 | |
| 480 if not isinstance(cmd, types.CodeType): | |
| 481 cmd = compile(cmd, "<string>", "exec") | |
| 482 | |
| 483 if debug: | |
| 484 # First time the trace_dispatch function is called, a "base debug" | |
| 485 # function has to be returned, which is called at every user code | |
| 486 # function call. This is ensured by setting stop_everywhere. | |
| 487 self.stop_everywhere = True | |
| 488 sys.settrace(self.trace_dispatch) | |
| 489 | |
| 490 try: | |
| 491 exec(cmd, globalsDict, localsDict) # secok | |
| 492 atexit._run_exitfuncs() | |
| 493 self._dbgClient.progTerminated(0, closeSession=closeSession) | |
| 494 exitcode = 0 | |
| 495 except SystemExit: | |
| 496 atexit._run_exitfuncs() | |
| 497 excinfo = sys.exc_info() | |
| 498 exitcode, message = self.__extractSystemExitMessage(excinfo) | |
| 499 self._dbgClient.progTerminated(exitcode, message=message, | |
| 500 closeSession=closeSession) | |
| 501 except Exception: | |
| 502 excinfo = sys.exc_info() | |
| 503 self.user_exception(excinfo, True) | |
| 504 exitcode = 242 | |
| 505 finally: | |
| 506 self.quitting = True | |
| 507 sys.settrace(None) | |
| 508 return exitcode | |
| 509 | |
| 510 def _set_stopinfo(self, stopframe, returnframe, stoplineno=0): | |
| 511 """ | |
| 512 Protected method to update the frame pointers. | |
| 513 | |
| 514 @param stopframe the frame object where to stop | |
| 515 @type frame object | |
| 516 @param returnframe the frame object where to stop on a function return | |
| 517 @type frame object | |
| 518 @param stoplineno line number to stop at. If stoplineno is greater than | |
| 519 or equal to 0, then stop at line greater than or equal to the | |
| 520 stopline. If stoplineno is -1, then don't stop at all. | |
| 521 @type int | |
| 522 """ | |
| 523 self.stopframe = stopframe | |
| 524 self.returnframe = returnframe | |
| 525 # stoplineno >= 0 means: stop at line >= the stoplineno | |
| 526 # stoplineno -1 means: don't stop at all | |
| 527 self.stoplineno = stoplineno | |
| 528 | |
| 529 if returnframe is not None: | |
| 530 # Ensure to be able to stop on the return frame | |
| 531 returnframe.f_trace = self.trace_dispatch | |
| 532 self.stop_everywhere = False | |
| 533 | |
| 534 def set_continue(self, special): | |
| 535 """ | |
| 536 Public method to stop only on next breakpoint. | |
| 537 | |
| 538 @param special flag indicating a special continue operation | |
| 539 @type bool | |
| 540 """ | |
| 541 # Here we only set a new stop frame if it is a normal continue. | |
| 542 if not special: | |
| 543 self._set_stopinfo(None, None, -1) | |
| 544 | |
| 545 # Disable tracing if not started in debug mode | |
| 546 if not self._dbgClient.debugging: | |
| 547 sys.settrace(None) | |
| 548 sys.setprofile(None) | |
| 549 | |
| 550 def set_until(self, frame=None, lineno=None): | |
| 551 """ | |
| 552 Public method to stop when the line with the lineno greater than the | |
| 553 current one is reached or when returning from current frame. | |
| 554 | |
| 555 @param frame reference to the frame object | |
| 556 @type frame object | |
| 557 @param lineno line number to continue to | |
| 558 @type int | |
| 559 """ | |
| 560 # the name "until" is borrowed from gdb | |
| 561 if frame is None: | |
| 562 frame = self.currentFrame | |
| 563 if lineno is None: | |
| 564 lineno = frame.f_lineno + 1 | |
| 565 self._set_stopinfo(frame, frame, lineno) | |
| 566 | |
| 567 def set_step(self): | |
| 568 """ | |
| 569 Public method to stop after one line of code. | |
| 570 """ | |
| 571 self._set_stopinfo(None, None) | |
| 572 self.stop_everywhere = True | |
| 573 | |
| 574 def set_next(self, frame): | |
| 575 """ | |
| 576 Public method to stop on the next line in or below the given frame. | |
| 577 | |
| 578 @param frame the frame object | |
| 579 @type frame object | |
| 580 """ | |
| 581 self._set_stopinfo(frame, frame.f_back) | |
| 582 frame.f_trace = self.trace_dispatch | |
| 583 | |
| 584 def set_return(self, frame): | |
| 585 """ | |
| 586 Public method to stop when returning from the given frame. | |
| 587 | |
| 588 @param frame the frame object | |
| 589 @type frame object | |
| 590 """ | |
| 591 self._set_stopinfo(None, frame.f_back) | |
| 592 | |
| 593 def move_instruction_pointer(self, lineno): | |
| 594 """ | |
| 595 Public methode to move the instruction pointer to another line. | |
| 596 | |
| 597 @param lineno new line number | |
| 598 @type int | |
| 599 """ | |
| 600 try: | |
| 601 self.currentFrame.f_lineno = lineno | |
| 602 stack = self.getStack(self.currentFrame) | |
| 603 self._dbgClient.sendResponseLine(stack, self.name) | |
| 604 except Exception as e: | |
| 605 printerr(e) | |
| 606 | |
| 607 def set_quit(self): | |
| 608 """ | |
| 609 Public method to quit. | |
| 610 | |
| 611 Disables the trace functions and resets all frame pointer. | |
| 612 """ | |
| 613 sys.setprofile(None) | |
| 614 self.stopframe = None | |
| 615 self.returnframe = None | |
| 616 for debugThread in self._dbgClient.threads.values(): | |
| 617 debugThread.quitting = True | |
| 618 | |
| 619 def fix_frame_filename(self, frame): | |
| 620 """ | |
| 621 Public method used to fixup the filename for a given frame. | |
| 622 | |
| 623 The logic employed here is that if a module was loaded | |
| 624 from a .pyc file, then the correct .py to operate with | |
| 625 should be in the same path as the .pyc. The reason this | |
| 626 logic is needed is that when a .pyc file is generated, the | |
| 627 filename embedded and thus what is readable in the code object | |
| 628 of the frame object is the fully qualified filepath when the | |
| 629 pyc is generated. If files are moved from machine to machine | |
| 630 this can break debugging as the .pyc will refer to the .py | |
| 631 on the original machine. Another case might be sharing | |
| 632 code over a network... This logic deals with that. | |
| 633 | |
| 634 @param frame the frame object | |
| 635 @type frame object | |
| 636 @return fixed up file name | |
| 637 @rtype str | |
| 638 """ | |
| 639 # get module name from __file__ | |
| 640 fn = frame.f_globals.get('__file__') | |
| 641 try: | |
| 642 return self._fnCache[fn] | |
| 643 except KeyError: | |
| 644 if fn is None: | |
| 645 return frame.f_code.co_filename | |
| 646 | |
| 647 absFilename = os.path.abspath(fn) | |
| 648 if absFilename.endswith(('.pyc', '.pyo', '.pyd')): | |
| 649 fixedName = absFilename[:-1] | |
| 650 if not os.path.exists(fixedName): | |
| 651 fixedName = absFilename | |
| 652 else: | |
| 653 fixedName = absFilename | |
| 654 # update cache | |
| 655 self._fnCache[fn] = fixedName | |
| 656 return fixedName | |
| 657 | |
| 658 def __checkBreakInFrame(self, frame): | |
| 659 """ | |
| 660 Private method to check if the function / method has a line number | |
| 661 which is a breakpoint. | |
| 662 | |
| 663 @param frame the frame object | |
| 664 @type frame object | |
| 665 @return Flag indicating a function / method with breakpoint | |
| 666 @rtype bool | |
| 667 """ | |
| 668 try: | |
| 669 return Breakpoint.breakInFrameCache[ | |
| 670 frame.f_globals.get('__file__'), | |
| 671 frame.f_code.co_firstlineno] | |
| 672 except KeyError: | |
| 673 filename = self.fix_frame_filename(frame) | |
| 674 if filename not in Breakpoint.breakInFile: | |
| 675 Breakpoint.breakInFrameCache[ | |
| 676 frame.f_globals.get('__file__'), | |
| 677 frame.f_code.co_firstlineno] = False | |
| 678 return False | |
| 679 lineNo = frame.f_code.co_firstlineno | |
| 680 lineNumbers = [lineNo] | |
| 681 | |
| 682 co_lnotab = frame.f_code.co_lnotab[1::2] | |
| 683 | |
| 684 # No need to handle special case if a lot of lines between | |
| 685 # (e.g. closure), because the additional lines won't cause a bp | |
| 686 for co_lno in co_lnotab: | |
| 687 if co_lno >= 0x80: | |
| 688 lineNo -= 0x100 | |
| 689 lineNo += co_lno | |
| 690 lineNumbers.append(lineNo) | |
| 691 | |
| 692 for bp in Breakpoint.breakInFile[filename]: | |
| 693 if bp in lineNumbers: | |
| 694 Breakpoint.breakInFrameCache[ | |
| 695 frame.f_globals.get('__file__'), | |
| 696 frame.f_code.co_firstlineno] = True | |
| 697 return True | |
| 698 Breakpoint.breakInFrameCache[ | |
| 699 frame.f_globals.get('__file__'), | |
| 700 frame.f_code.co_firstlineno] = False | |
| 701 return False | |
| 702 | |
| 703 def break_here(self, frame): | |
| 704 """ | |
| 705 Public method reimplemented from bdb.py to fix the filename from the | |
| 706 frame. | |
| 707 | |
| 708 See fix_frame_filename for more info. | |
| 709 | |
| 710 @param frame the frame object | |
| 711 @type frame object | |
| 712 @return flag indicating the break status | |
| 713 @rtype bool | |
| 714 """ | |
| 715 filename = self.fix_frame_filename(frame) | |
| 716 if (filename, frame.f_lineno) in Breakpoint.breaks: | |
| 717 bp, flag = Breakpoint.effectiveBreak( | |
| 718 filename, frame.f_lineno, frame) | |
| 719 if bp: | |
| 720 # flag says ok to delete temp. bp | |
| 721 if flag and bp.temporary: | |
| 722 self.__do_clearBreak(filename, frame.f_lineno) | |
| 723 return True | |
| 724 | |
| 725 if Watch.watches != []: | |
| 726 bp, flag = Watch.effectiveWatch(frame) | |
| 727 if bp: | |
| 728 # flag says ok to delete temp. watch | |
| 729 if flag and bp.temporary: | |
| 730 self.__do_clearWatch(bp.cond) | |
| 731 return True | |
| 732 | |
| 733 return False | |
| 734 | |
| 735 def __do_clearBreak(self, filename, lineno): | |
| 736 """ | |
| 737 Private method called to clear a temporary breakpoint. | |
| 738 | |
| 739 @param filename name of the file the bp belongs to | |
| 740 @type str | |
| 741 @param lineno linenumber of the bp | |
| 742 @type int | |
| 743 """ | |
| 744 Breakpoint.clear_break(filename, lineno) | |
| 745 self._dbgClient.sendClearTemporaryBreakpoint(filename, lineno) | |
| 746 | |
| 747 def __do_clearWatch(self, cond): | |
| 748 """ | |
| 749 Private method called to clear a temporary watch expression. | |
| 750 | |
| 751 @param cond expression of the watch expression to be cleared | |
| 752 @type str | |
| 753 """ | |
| 754 Watch.clear_watch(cond) | |
| 755 self._dbgClient.sendClearTemporaryWatch(cond) | |
| 756 | |
| 757 def getStack(self, frame=None, applyTrace=False): | |
| 758 """ | |
| 759 Public method to get the stack. | |
| 760 | |
| 761 @param frame frame object to inspect | |
| 762 @type frame object or list | |
| 763 @param applyTrace flag to assign trace function to fr.f_trace | |
| 764 @type bool | |
| 765 @return list of lists with file name (string), line number (integer) | |
| 766 and function name (string) | |
| 767 """ | |
| 768 tb_lineno = None | |
| 769 if frame is None: | |
| 770 fr = self.getCurrentFrame() | |
| 771 elif type(frame) == list: | |
| 772 fr, tb_lineno = frame.pop(0) | |
| 773 else: | |
| 774 fr = frame | |
| 775 | |
| 776 stack = [] | |
| 777 while fr is not None: | |
| 778 if applyTrace: | |
| 779 # Reset the trace function so we can be sure | |
| 780 # to trace all functions up the stack... This gets around | |
| 781 # problems where an exception/breakpoint has occurred | |
| 782 # but we had disabled tracing along the way via a None | |
| 783 # return from dispatch_call | |
| 784 fr.f_trace = self.trace_dispatch | |
| 785 | |
| 786 fname = self._dbgClient.absPath(self.fix_frame_filename(fr)) | |
| 787 # Always show at least one stack frame, even if it's from eric. | |
| 788 if stack and os.path.basename(fname).startswith( | |
| 789 ("DebugBase.py", "DebugClientBase.py", | |
| 790 "ThreadExtension.py", "threading.py") | |
| 791 ): | |
| 792 break | |
| 793 | |
| 794 fline = tb_lineno or fr.f_lineno | |
| 795 ffunc = fr.f_code.co_name | |
| 796 | |
| 797 if ffunc == '?': | |
| 798 ffunc = '' | |
| 799 | |
| 800 if ffunc and not ffunc.startswith("<"): | |
| 801 argInfo = getargvalues(fr) | |
| 802 try: | |
| 803 fargs = formatargvalues( | |
| 804 argInfo.args, argInfo.varargs, | |
| 805 argInfo.keywords, argInfo.locals) | |
| 806 except Exception: | |
| 807 fargs = "" | |
| 808 else: | |
| 809 fargs = "" | |
| 810 | |
| 811 stack.append([fname, fline, ffunc, fargs]) | |
| 812 | |
| 813 # is it a stack frame or exception list? | |
| 814 if type(frame) == list: | |
| 815 if frame != []: | |
| 816 fr, tb_lineno = frame.pop(0) | |
| 817 else: | |
| 818 fr = None | |
| 819 else: | |
| 820 fr = fr.f_back | |
| 821 | |
| 822 return stack | |
| 823 | |
| 824 def user_line(self, frame): | |
| 825 """ | |
| 826 Public method reimplemented to handle the program about to execute a | |
| 827 particular line. | |
| 828 | |
| 829 @param frame the frame object | |
| 830 """ | |
| 831 # We never stop on line 0. | |
| 832 if frame.f_lineno == 0: | |
| 833 return | |
| 834 | |
| 835 self.isBroken = True | |
| 836 self.currentFrame = frame | |
| 837 stack = self.getStack(frame, applyTrace=True) | |
| 838 | |
| 839 self._dbgClient.lockClient() | |
| 840 self._dbgClient.currentThread = self | |
| 841 self._dbgClient.currentThreadExec = self | |
| 842 | |
| 843 self._dbgClient.sendResponseLine(stack, self.name) | |
| 844 self._dbgClient.eventLoop() | |
| 845 | |
| 846 self.isBroken = False | |
| 847 self._dbgClient.unlockClient() | |
| 848 | |
| 849 self._dbgClient.dumpThreadList() | |
| 850 | |
| 851 def user_exception(self, excinfo, unhandled=False): | |
| 852 """ | |
| 853 Public method reimplemented to report an exception to the debug server. | |
| 854 | |
| 855 @param excinfo details about the exception | |
| 856 @type tuple(Exception, excval object, traceback frame object) | |
| 857 @param unhandled flag indicating an uncaught exception | |
| 858 @type bool | |
| 859 """ | |
| 860 exctype, excval, exctb = excinfo | |
| 861 | |
| 862 if ((exctype in [GeneratorExit, StopIteration] and | |
| 863 unhandled is False) or | |
| 864 exctype == SystemExit): | |
| 865 # ignore these | |
| 866 return | |
| 867 | |
| 868 if exctype in [SyntaxError, IndentationError]: | |
| 869 try: | |
| 870 if type(excval) == tuple: | |
| 871 message, details = excval | |
| 872 filename, lineno, charno, text = details | |
| 873 else: | |
| 874 message = excval.msg | |
| 875 filename = excval.filename | |
| 876 lineno = excval.lineno | |
| 877 charno = excval.offset | |
| 878 | |
| 879 if filename is None: | |
| 880 realSyntaxError = False | |
| 881 else: | |
| 882 if charno is None: | |
| 883 charno = 0 | |
| 884 | |
| 885 filename = os.path.abspath(filename) | |
| 886 realSyntaxError = os.path.exists(filename) | |
| 887 | |
| 888 except (AttributeError, ValueError): | |
| 889 message = "" | |
| 890 filename = "" | |
| 891 lineno = 0 | |
| 892 charno = 0 | |
| 893 realSyntaxError = True | |
| 894 | |
| 895 if realSyntaxError: | |
| 896 self._dbgClient.sendSyntaxError( | |
| 897 message, filename, lineno, charno, self.name) | |
| 898 self._dbgClient.eventLoop() | |
| 899 return | |
| 900 | |
| 901 self.skipFrames = 0 | |
| 902 if (exctype == RuntimeError and | |
| 903 str(excval).startswith('maximum recursion depth exceeded') or | |
| 904 sys.version_info >= (3, 5) and | |
| 905 exctype == RecursionError): # __IGNORE_WARNING__ | |
| 906 excval = 'maximum recursion depth exceeded' | |
| 907 depth = 0 | |
| 908 tb = exctb | |
| 909 while tb: | |
| 910 tb = tb.tb_next | |
| 911 | |
| 912 if (tb and tb.tb_frame.f_code.co_name == 'trace_dispatch' and | |
| 913 __file__.startswith(tb.tb_frame.f_code.co_filename)): | |
| 914 depth = 1 | |
| 915 self.skipFrames += depth | |
| 916 | |
| 917 # always 1 if running without debugger | |
| 918 self.skipFrames = max(1, self.skipFrames) | |
| 919 | |
| 920 exctype = self.__extractExceptionName(exctype) | |
| 921 | |
| 922 if excval is None: | |
| 923 excval = '' | |
| 924 | |
| 925 exctypetxt = ( | |
| 926 "unhandled {0!s}".format(str(exctype)) | |
| 927 if unhandled else | |
| 928 str(exctype) | |
| 929 ) | |
| 930 excvaltxt = str(excval) | |
| 931 | |
| 932 # Don't step into libraries, which are used by our debugger methods | |
| 933 if exctb is not None: | |
| 934 self.stop_everywhere = False | |
| 935 | |
| 936 self.isBroken = True | |
| 937 self.isException = True | |
| 938 | |
| 939 disassembly = None | |
| 940 stack = [] | |
| 941 if exctb: | |
| 942 frlist = self.__extract_stack(exctb) | |
| 943 frlist.reverse() | |
| 944 disassembly = self.__disassemble(frlist[0][0]) | |
| 945 | |
| 946 self.currentFrame = frlist[0][0] | |
| 947 stack = self.getStack(frlist[self.skipFrames:]) | |
| 948 | |
| 949 self._dbgClient.lockClient() | |
| 950 self._dbgClient.currentThread = self | |
| 951 self._dbgClient.currentThreadExec = self | |
| 952 self._dbgClient.sendException(exctypetxt, excvaltxt, stack, self.name) | |
| 953 self._dbgClient.setDisassembly(disassembly) | |
| 954 self._dbgClient.dumpThreadList() | |
| 955 | |
| 956 if exctb is not None: | |
| 957 # When polling kept enabled, it isn't possible to resume after an | |
| 958 # unhandled exception without further user interaction. | |
| 959 self._dbgClient.eventLoop(True) | |
| 960 | |
| 961 self.skipFrames = 0 | |
| 962 | |
| 963 self.isBroken = False | |
| 964 self.isException = False | |
| 965 stop_everywhere = self.stop_everywhere | |
| 966 self.stop_everywhere = False | |
| 967 self.eventPollFlag = False | |
| 968 self._dbgClient.unlockClient() | |
| 969 self.stop_everywhere = stop_everywhere | |
| 970 | |
| 971 self._dbgClient.dumpThreadList() | |
| 972 | |
| 973 def __extractExceptionName(self, exctype): | |
| 974 """ | |
| 975 Private method to extract the exception name given the exception | |
| 976 type object. | |
| 977 | |
| 978 @param exctype type of the exception | |
| 979 @return exception name (string) | |
| 980 """ | |
| 981 return str(exctype).replace("<class '", "").replace("'>", "") | |
| 982 | |
| 983 def __extract_stack(self, exctb): | |
| 984 """ | |
| 985 Private member to return a list of stack frames. | |
| 986 | |
| 987 @param exctb exception traceback | |
| 988 @return list of stack frames | |
| 989 """ | |
| 990 tb = exctb | |
| 991 stack = [] | |
| 992 while tb is not None: | |
| 993 stack.append((tb.tb_frame, tb.tb_lineno)) | |
| 994 tb = tb.tb_next | |
| 995 tb = None | |
| 996 return stack | |
| 997 | |
| 998 def __disassemble(self, frame): | |
| 999 """ | |
| 1000 Private method to generate a disassembly of the given code object. | |
| 1001 | |
| 1002 @param frame frame object to be disassembled | |
| 1003 @type code | |
| 1004 @return dictionary containing the disassembly information | |
| 1005 @rtype dict | |
| 1006 """ | |
| 1007 co = frame.f_code | |
| 1008 disDict = { | |
| 1009 "lasti": frame.f_lasti, | |
| 1010 "firstlineno": co.co_firstlineno, | |
| 1011 "instructions": [], | |
| 1012 } | |
| 1013 | |
| 1014 # 1. disassembly info | |
| 1015 for instr in dis.get_instructions(co): | |
| 1016 instrDict = { | |
| 1017 "lineno": | |
| 1018 0 if instr.starts_line is None else instr.starts_line, | |
| 1019 "isJumpTarget": instr.is_jump_target, | |
| 1020 "offset": instr.offset, | |
| 1021 "opname": instr.opname, | |
| 1022 "arg": instr.arg, | |
| 1023 "argrepr": instr.argrepr, | |
| 1024 } | |
| 1025 disDict["instructions"].append(instrDict) | |
| 1026 | |
| 1027 # 2. code info | |
| 1028 # Note: keep in sync with PythonDisViewer.__createCodeInfo() | |
| 1029 disDict["codeinfo"] = { | |
| 1030 "name": co.co_name, | |
| 1031 "filename": co.co_filename, | |
| 1032 "firstlineno": co.co_firstlineno, | |
| 1033 "argcount": co.co_argcount, | |
| 1034 "kwonlyargcount": co.co_kwonlyargcount, | |
| 1035 "nlocals": co.co_nlocals, | |
| 1036 "stacksize": co.co_stacksize, | |
| 1037 "flags": dis.pretty_flags(co.co_flags), | |
| 1038 "consts": [str(const) for const in co.co_consts], | |
| 1039 "names": [str(name) for name in co.co_names], | |
| 1040 "varnames": [str(name) for name in co.co_varnames], | |
| 1041 "freevars": [str(var) for var in co.co_freevars], | |
| 1042 "cellvars": [str(var) for var in co.co_cellvars], | |
| 1043 } | |
| 1044 try: | |
| 1045 disDict["codeinfo"]["posonlyargcount"] = co.co_posonlyargcount | |
| 1046 except AttributeError: | |
| 1047 # does not exist prior to 3.8.0 | |
| 1048 disDict["codeinfo"]["posonlyargcount"] = 0 | |
| 1049 | |
| 1050 return disDict | |
| 1051 | |
| 1052 def __extractSystemExitMessage(self, excinfo): | |
| 1053 """ | |
| 1054 Private method to get the SystemExit code and message. | |
| 1055 | |
| 1056 @param excinfo details about the SystemExit exception | |
| 1057 @type tuple(Exception, excval object, traceback frame object) | |
| 1058 @return SystemExit code and message | |
| 1059 @rtype int, str | |
| 1060 """ | |
| 1061 exctype, excval, exctb = excinfo | |
| 1062 if excval is None: | |
| 1063 exitcode = 0 | |
| 1064 message = "" | |
| 1065 elif isinstance(excval, str): | |
| 1066 exitcode = 1 | |
| 1067 message = excval | |
| 1068 elif isinstance(excval, bytes): | |
| 1069 exitcode = 1 | |
| 1070 message = excval.decode() | |
| 1071 elif isinstance(excval, int): | |
| 1072 exitcode = excval | |
| 1073 message = "" | |
| 1074 elif isinstance(excval, SystemExit): | |
| 1075 code = excval.code | |
| 1076 if isinstance(code, str): | |
| 1077 exitcode = 1 | |
| 1078 message = code | |
| 1079 elif isinstance(code, bytes): | |
| 1080 exitcode = 1 | |
| 1081 message = code.decode() | |
| 1082 elif isinstance(code, int): | |
| 1083 exitcode = code | |
| 1084 message = "" | |
| 1085 elif code is None: | |
| 1086 exitcode = 0 | |
| 1087 message = "" | |
| 1088 else: | |
| 1089 exitcode = 1 | |
| 1090 message = str(code) | |
| 1091 else: | |
| 1092 exitcode = 1 | |
| 1093 message = str(excval) | |
| 1094 | |
| 1095 return exitcode, message | |
| 1096 | |
| 1097 def stop_here(self, frame): | |
| 1098 """ | |
| 1099 Public method reimplemented to filter out debugger files. | |
| 1100 | |
| 1101 Tracing is turned off for files that are part of the | |
| 1102 debugger that are called from the application being debugged. | |
| 1103 | |
| 1104 @param frame the frame object | |
| 1105 @type frame object | |
| 1106 @return flag indicating whether the debugger should stop here | |
| 1107 @rtype bool | |
| 1108 """ | |
| 1109 if self.__skipFrame(frame): | |
| 1110 return False | |
| 1111 | |
| 1112 if frame is self.stopframe: | |
| 1113 if self.stoplineno == -1: | |
| 1114 return False | |
| 1115 return frame.f_lineno >= self.stoplineno | |
| 1116 return self.stop_everywhere or frame is self.returnframe | |
| 1117 | |
| 1118 def tracePythonLibs(self, enable): | |
| 1119 """ | |
| 1120 Public method to update the settings to trace into Python libraries. | |
| 1121 | |
| 1122 @param enable flag to debug into Python libraries | |
| 1123 @type bool | |
| 1124 """ | |
| 1125 pathsToSkip = list(self.pathsToSkip) | |
| 1126 # don't trace into Python library? | |
| 1127 if enable: | |
| 1128 pathsToSkip = [x for x in pathsToSkip if not x.endswith( | |
| 1129 ("site-packages", "dist-packages", self.lib))] | |
| 1130 else: | |
| 1131 pathsToSkip.append(self.lib) | |
| 1132 localLib = [x for x in sys.path if x.endswith(("site-packages", | |
| 1133 "dist-packages")) and not x.startswith(self.lib)] | |
| 1134 pathsToSkip.extend(localLib) | |
| 1135 | |
| 1136 self.pathsToSkip = tuple(set(pathsToSkip)) | |
| 1137 | |
| 1138 def __skipFrame(self, frame): | |
| 1139 """ | |
| 1140 Private method to filter out debugger files. | |
| 1141 | |
| 1142 Tracing is turned off for files that are part of the | |
| 1143 debugger that are called from the application being debugged. | |
| 1144 | |
| 1145 @param frame the frame object | |
| 1146 @type frame object | |
| 1147 @return flag indicating whether the debugger should skip this frame | |
| 1148 @rtype bool | |
| 1149 """ | |
| 1150 try: | |
| 1151 return self.filesToSkip[frame.f_code.co_filename] | |
| 1152 except KeyError: | |
| 1153 ret = frame.f_code.co_filename.startswith(self.pathsToSkip) | |
| 1154 self.filesToSkip[frame.f_code.co_filename] = ret | |
| 1155 return ret | |
| 1156 except AttributeError: | |
| 1157 # if frame is None | |
| 1158 return True |
