Exemplo n.º 1
0
    def trace_dispatch(self, frame, event, arg):
    # ENDIF

        main_debugger, filename, info, thread, frame_skips_cache, frame_cache_key = self._args
        # print('frame trace_dispatch', frame.f_lineno, frame.f_code.co_name, event, info.pydev_step_cmd)
        try:
            info.is_tracing = True
            line = frame.f_lineno
            line_cache_key = (frame_cache_key, line)

            if main_debugger._finish_debugging_session:
                return None

            plugin_manager = main_debugger.plugin

            is_exception_event = event == 'exception'
            has_exception_breakpoints = main_debugger.break_on_caught_exceptions or main_debugger.has_plugin_exception_breaks

            if is_exception_event:
                if has_exception_breakpoints:
                    flag, frame = self.should_stop_on_exception(frame, event, arg)
                    if flag:
                        self.handle_exception(frame, event, arg)
                        return self.trace_dispatch
                is_line = False
                is_return = False
                is_call = False
            else:
                is_line = event == 'line'
                is_return = event == 'return'
                is_call = event == 'call'
                if not is_line and not is_return and not is_call:
                    # I believe this can only happen in jython on some frontiers on jython and java code, which we don't want to trace.
                    return None

            need_trace_return = False
            if is_call and main_debugger.signature_factory:
                need_trace_return = send_signature_call_trace(main_debugger, frame, filename)
            if is_return and main_debugger.signature_factory:
                send_signature_return_trace(main_debugger, frame, filename, arg)

            stop_frame = info.pydev_step_stop
            step_cmd = info.pydev_step_cmd

            if is_exception_event:
                breakpoints_for_file = None
                # CMD_STEP_OVER = 108
                if stop_frame and stop_frame is not frame and step_cmd == 108 and \
                                arg[0] in (StopIteration, GeneratorExit) and arg[2] is None:
                    info.pydev_step_cmd = 107  # CMD_STEP_INTO = 107
                    info.pydev_step_stop = None
            else:
                # If we are in single step mode and something causes us to exit the current frame, we need to make sure we break
                # eventually.  Force the step mode to step into and the step stop frame to None.
                # I.e.: F6 in the end of a function should stop in the next possible position (instead of forcing the user
                # to make a step in or step over at that location).
                # Note: this is especially troublesome when we're skipping code with the
                # @DontTrace comment.
                if stop_frame is frame and is_return and step_cmd in (109, 108):  # CMD_STEP_RETURN = 109, CMD_STEP_OVER = 108
                    if not frame.f_code.co_flags & 0x20:  # CO_GENERATOR = 0x20 (inspect.CO_GENERATOR)
                        info.pydev_step_cmd = 107  # CMD_STEP_INTO = 107
                        info.pydev_step_stop = None

                breakpoints_for_file = main_debugger.breakpoints.get(filename)

                can_skip = False

                if info.pydev_state == 1:  # STATE_RUN = 1
                    #we can skip if:
                    #- we have no stop marked
                    #- we should make a step return/step over and we're not in the current frame
                    # CMD_STEP_RETURN = 109, CMD_STEP_OVER = 108
                    can_skip = (step_cmd == -1 and stop_frame is None) \
                        or (step_cmd in (109, 108) and stop_frame is not frame)

                    if can_skip:
                        if plugin_manager is not None and main_debugger.has_plugin_line_breaks:
                            can_skip = not plugin_manager.can_not_skip(main_debugger, self, frame)

                        # CMD_STEP_OVER = 108
                        if can_skip and is_return and main_debugger.show_return_values and info.pydev_step_cmd == 108 and frame.f_back is info.pydev_step_stop:
                            # trace function for showing return values after step over
                            can_skip = False

                # Let's check to see if we are in a function that has a breakpoint. If we don't have a breakpoint,
                # we will return nothing for the next trace
                # also, after we hit a breakpoint and go to some other debugging state, we have to force the set trace anyway,
                # so, that's why the additional checks are there.
                if not breakpoints_for_file:
                    if can_skip:
                        if has_exception_breakpoints:
                            return self.trace_exception
                        else:
                            if need_trace_return:
                                return self.trace_return
                            else:
                                return None

                else:
                    # When cached, 0 means we don't have a breakpoint and 1 means we have.
                    if can_skip:
                        breakpoints_in_line_cache = frame_skips_cache.get(line_cache_key, -1)
                        if breakpoints_in_line_cache == 0:
                            return self.trace_dispatch

                    breakpoints_in_frame_cache = frame_skips_cache.get(frame_cache_key, -1)
                    if breakpoints_in_frame_cache != -1:
                        # Gotten from cache.
                        has_breakpoint_in_frame = breakpoints_in_frame_cache == 1

                    else:
                        has_breakpoint_in_frame = False
                        # Checks the breakpoint to see if there is a context match in some function
                        curr_func_name = frame.f_code.co_name

                        #global context is set with an empty name
                        if curr_func_name in ('?', '<module>'):
                            curr_func_name = ''

                        for breakpoint in dict_iter_values(breakpoints_for_file): #jython does not support itervalues()
                            #will match either global or some function
                            if breakpoint.func_name in ('None', curr_func_name):
                                has_breakpoint_in_frame = True
                                break

                        # Cache the value (1 or 0 or -1 for default because of cython).
                        if has_breakpoint_in_frame:
                            frame_skips_cache[frame_cache_key] = 1
                        else:
                            frame_skips_cache[frame_cache_key] = 0


                    if can_skip and not has_breakpoint_in_frame:
                        if has_exception_breakpoints:
                            return self.trace_exception
                        else:
                            if need_trace_return:
                                return self.trace_return
                            else:
                                return None

            #We may have hit a breakpoint or we are already in step mode. Either way, let's check what we should do in this frame
            # print('NOT skipped', frame.f_lineno, frame.f_code.co_name, event)

            try:
                flag = False
                #return is not taken into account for breakpoint hit because we'd have a double-hit in this case
                #(one for the line and the other for the return).

                stop_info = {}
                breakpoint = None
                exist_result = False
                stop = False
                bp_type = None
                if not is_return and info.pydev_state != STATE_SUSPEND and breakpoints_for_file is not None and line in breakpoints_for_file:
                    breakpoint = breakpoints_for_file[line]
                    new_frame = frame
                    stop = True
                    if step_cmd == CMD_STEP_OVER and stop_frame is frame and (is_line or is_return):
                        stop = False #we don't stop on breakpoint if we have to stop by step-over (it will be processed later)
                elif plugin_manager is not None and main_debugger.has_plugin_line_breaks:
                    result = plugin_manager.get_breakpoint(main_debugger, self, frame, event, self._args)
                    if result:
                        exist_result = True
                        flag, breakpoint, new_frame, bp_type = result

                if breakpoint:
                    #ok, hit breakpoint, now, we have to discover if it is a conditional breakpoint
                    # lets do the conditional stuff here
                    if stop or exist_result:
                        condition = breakpoint.condition
                        if condition is not None:
                            eval_result = handle_breakpoint_condition(main_debugger, info, breakpoint, new_frame)
                            if not eval_result:
                                return self.trace_dispatch

                        if breakpoint.expression is not None:
                            handle_breakpoint_expression(breakpoint, info, new_frame)

                        if not main_debugger.first_breakpoint_reached:
                            if is_call:
                                back = frame.f_back
                                if back is not None:
                                    # When we start debug session, we call execfile in pydevd run function. It produces an additional
                                    # 'call' event for tracing and we stop on the first line of code twice.
                                    _, back_filename, base = get_abs_path_real_path_and_base_from_frame(back)
                                    if (base == DEBUG_START[0] and back.f_code.co_name == DEBUG_START[1]) or \
                                            (base == DEBUG_START_PY3K[0] and back.f_code.co_name == DEBUG_START_PY3K[1]):
                                        stop = False
                                        main_debugger.first_breakpoint_reached = True
                else:
                    # if the frame is traced after breakpoint stop,
                    # but the file should be ignored while stepping because of filters
                    if step_cmd != -1:
                        if main_debugger.is_filter_enabled and main_debugger.is_ignored_by_filters(filename):
                            # ignore files matching stepping filters
                            return self.trace_dispatch
                        if main_debugger.is_filter_libraries and main_debugger.not_in_scope(filename):
                            # ignore library files while stepping
                            return self.trace_dispatch

                if main_debugger.show_return_values:
                    if is_return and info.pydev_step_cmd == CMD_STEP_OVER and frame.f_back == info.pydev_step_stop:
                        self.show_return_values(frame, arg)

                elif main_debugger.remove_return_values_flag:
                    try:
                        self.remove_return_values(main_debugger, frame)
                    finally:
                        main_debugger.remove_return_values_flag = False

                if stop:
                    self.set_suspend(thread, CMD_SET_BREAK)
                    if breakpoint and breakpoint.suspend_policy == "ALL":
                        main_debugger.suspend_all_other_threads(thread)
                elif flag and plugin_manager is not None:
                    result = plugin_manager.suspend(main_debugger, thread, frame, bp_type)
                    if result:
                        frame = result

                # if thread has a suspend flag, we suspend with a busy wait
                if info.pydev_state == STATE_SUSPEND:
                    self.do_wait_suspend(thread, frame, event, arg)
                    return self.trace_dispatch
                else:
                    if not breakpoint and not is_return:
                        # No stop from anyone and no breakpoint found in line (cache that).
                        frame_skips_cache[line_cache_key] = 0

            except:
                traceback.print_exc()
                raise

            #step handling. We stop when we hit the right frame
            try:
                should_skip = 0
                if pydevd_dont_trace.should_trace_hook is not None:
                    if self.should_skip == -1:
                        # I.e.: cache the result on self.should_skip (no need to evaluate the same frame multiple times).
                        # Note that on a code reload, we won't re-evaluate this because in practice, the frame.f_code
                        # Which will be handled by this frame is read-only, so, we can cache it safely.
                        if not pydevd_dont_trace.should_trace_hook(frame, filename):
                            # -1, 0, 1 to be Cython-friendly
                            should_skip = self.should_skip = 1
                        else:
                            should_skip = self.should_skip = 0
                    else:
                        should_skip = self.should_skip

                plugin_stop = False
                if should_skip:
                    stop = False

                elif step_cmd == CMD_STEP_INTO:
                    stop = is_line or is_return
                    if plugin_manager is not None:
                        result = plugin_manager.cmd_step_into(main_debugger, frame, event, self._args, stop_info, stop)
                        if result:
                            stop, plugin_stop = result

                elif step_cmd == CMD_STEP_INTO_MY_CODE:
                    if not main_debugger.not_in_scope(frame.f_code.co_filename):
                        stop = is_line

                elif step_cmd == CMD_STEP_OVER:
                    stop = stop_frame is frame and (is_line or is_return)

                    if frame.f_code.co_flags & CO_GENERATOR:
                        if is_return:
                            stop = False

                    if plugin_manager is not None:
                        result = plugin_manager.cmd_step_over(main_debugger, frame, event, self._args, stop_info, stop)
                        if result:
                            stop, plugin_stop = result

                elif step_cmd == CMD_SMART_STEP_INTO:
                    stop = False
                    if info.pydev_smart_step_stop is frame:
                        info.pydev_func_name = '.invalid.' # Must match the type in cython
                        info.pydev_smart_step_stop = None

                    if is_line or is_exception_event:
                        curr_func_name = frame.f_code.co_name

                        #global context is set with an empty name
                        if curr_func_name in ('?', '<module>') or curr_func_name is None:
                            curr_func_name = ''

                        if curr_func_name == info.pydev_func_name:
                            stop = True

                elif step_cmd == CMD_STEP_RETURN:
                    stop = is_return and stop_frame is frame

                elif step_cmd == CMD_RUN_TO_LINE or step_cmd == CMD_SET_NEXT_STATEMENT:
                    try:
                        stop, _, response_msg = main_debugger.set_next_statement(frame, event, info.pydev_func_name, info.pydev_next_line)
                    except ValueError:
                        pass

                else:
                    stop = False

                if stop and step_cmd != -1 and is_return and IS_PY3K and hasattr(frame, "f_back"):
                    f_code = getattr(frame.f_back, 'f_code', None)
                    if f_code is not None:
                        back_filename = os.path.basename(f_code.co_filename)
                        file_type = get_file_type(back_filename)
                        if file_type == PYDEV_FILE:
                            stop = False

                if plugin_stop:
                    stopped_on_plugin = plugin_manager.stop(main_debugger, frame, event, self._args, stop_info, arg, step_cmd)
                elif stop:
                    if is_line:
                        self.set_suspend(thread, step_cmd)
                        self.do_wait_suspend(thread, frame, event, arg)
                    else: #return event
                        back = frame.f_back
                        if back is not None:
                            #When we get to the pydevd run function, the debugging has actually finished for the main thread
                            #(note that it can still go on for other threads, but for this one, we just make it finish)
                            #So, just setting it to None should be OK
                            _, back_filename, base = get_abs_path_real_path_and_base_from_frame(back)
                            if base == DEBUG_START[0] and back.f_code.co_name == DEBUG_START[1]:
                                back = None

                            elif base == TRACE_PROPERTY:
                                # We dont want to trace the return event of pydevd_traceproperty (custom property for debugging)
                                #if we're in a return, we want it to appear to the user in the previous frame!
                                return None

                            elif pydevd_dont_trace.should_trace_hook is not None:
                                if not pydevd_dont_trace.should_trace_hook(back, back_filename):
                                    # In this case, we'll have to skip the previous one because it shouldn't be traced.
                                    # Also, we have to reset the tracing, because if the parent's parent (or some
                                    # other parent) has to be traced and it's not currently, we wouldn't stop where
                                    # we should anymore (so, a step in/over/return may not stop anywhere if no parent is traced).
                                    # Related test: _debugger_case17a.py
                                    main_debugger.set_trace_for_frame_and_parents(back, overwrite_prev_trace=True)
                                    return None

                        if back is not None:
                            #if we're in a return, we want it to appear to the user in the previous frame!
                            self.set_suspend(thread, step_cmd)
                            self.do_wait_suspend(thread, back, event, arg)
                        else:
                            #in jython we may not have a back frame
                            info.pydev_step_stop = None
                            info.pydev_step_cmd = -1
                            info.pydev_state = STATE_RUN

            except KeyboardInterrupt:
                raise
            except:
                try:
                    traceback.print_exc()
                    info.pydev_step_cmd = -1
                except:
                    return None

            #if we are quitting, let's stop the tracing
            retVal = None
            if not main_debugger.quitting:
                retVal = self.trace_dispatch

            return retVal
        finally:
            info.is_tracing = False
Exemplo n.º 2
0
 def trace_return(self, frame, event, arg):
     if event == 'return':
         main_debugger, filename = self._args[0], self._args[1]
         send_signature_return_trace(main_debugger, frame, filename, arg)
     return self.trace_return
Exemplo n.º 3
0
 def trace_return(self, frame, event, arg):
     if event == 'return':
         main_debugger, filename, info, thread = self._args
         send_signature_return_trace(main_debugger, frame, filename, arg)
     return self.trace_return
Exemplo n.º 4
0
    def trace_dispatch(self, frame, event, arg):
    # ENDIF
        # DEBUG = 'code_to_debug' in frame.f_code.co_filename
        main_debugger, filename, info, thread, frame_skips_cache, frame_cache_key = self._args
        # if DEBUG: print('frame trace_dispatch %s %s %s %s %s' % (frame.f_lineno, frame.f_code.co_name, frame.f_code.co_filename, event, info.pydev_step_cmd))
        try:
            info.is_tracing = True
            line = frame.f_lineno
            line_cache_key = (frame_cache_key, line)

            if main_debugger._finish_debugging_session:
                return None if event == 'call' else NO_FTRACE

            plugin_manager = main_debugger.plugin

            is_exception_event = event == 'exception'
            has_exception_breakpoints = main_debugger.break_on_caught_exceptions or main_debugger.has_plugin_exception_breaks

            if is_exception_event:
                if has_exception_breakpoints:
                    should_stop, frame = self.should_stop_on_exception(frame, event, arg)
                    if should_stop:
                        self.handle_exception(frame, event, arg)
                        return self.trace_dispatch
                is_line = False
                is_return = False
                is_call = False
            else:
                is_line = event == 'line'
                is_return = event == 'return'
                is_call = event == 'call'
                if not is_line and not is_return and not is_call:
                    # Unexpected: just keep the same trace func.
                    return self.trace_dispatch

            need_signature_trace_return = False
            if main_debugger.signature_factory is not None:
                if is_call:
                    need_signature_trace_return = send_signature_call_trace(main_debugger, frame, filename)
                elif is_return:
                    send_signature_return_trace(main_debugger, frame, filename, arg)

            stop_frame = info.pydev_step_stop
            step_cmd = info.pydev_step_cmd

            if is_exception_event:
                breakpoints_for_file = None
                # CMD_STEP_OVER = 108, CMD_STEP_OVER_MY_CODE = 159
                if stop_frame and stop_frame is not frame and step_cmd in (108, 159) and \
                                arg[0] in (StopIteration, GeneratorExit) and arg[2] is None:
                    if step_cmd == CMD_STEP_OVER:
                        info.pydev_step_cmd = CMD_STEP_INTO
                    else:
                        info.pydev_step_cmd = CMD_STEP_INTO_MY_CODE
                    info.pydev_step_stop = None
            else:
                # If we are in single step mode and something causes us to exit the current frame, we need to make sure we break
                # eventually.  Force the step mode to step into and the step stop frame to None.
                # I.e.: F6 in the end of a function should stop in the next possible position (instead of forcing the user
                # to make a step in or step over at that location).
                # Note: this is especially troublesome when we're skipping code with the
                # @DontTrace comment.
                if stop_frame is frame and is_return and step_cmd in (108, 109, 159, 160):
                    # CMD_STEP_OVER = 108, CMD_STEP_RETURN = 109, CMD_STEP_OVER_MY_CODE = 159, CMD_STEP_RETURN_MY_CODE = 160

                    if not frame.f_code.co_flags & 0x20:  # CO_GENERATOR = 0x20 (inspect.CO_GENERATOR)
                        if step_cmd in (108, 109):
                            info.pydev_step_cmd = CMD_STEP_INTO
                        else:
                            info.pydev_step_cmd = CMD_STEP_INTO_MY_CODE
                        info.pydev_step_stop = None

                breakpoints_for_file = main_debugger.breakpoints.get(filename)

                can_skip = False

                if info.pydev_state == 1:  # STATE_RUN = 1
                    # we can skip if:
                    # - we have no stop marked
                    # - we should make a step return/step over and we're not in the current frame
                    # CMD_STEP_OVER = 108, CMD_STEP_RETURN = 109, CMD_STEP_OVER_MY_CODE = 159, CMD_STEP_RETURN_MY_CODE = 160
                    can_skip = (step_cmd == -1 and stop_frame is None) \
                        or (step_cmd in (108, 109, 159, 160) and stop_frame is not frame)

                    if can_skip:
                        if plugin_manager is not None and (
                                main_debugger.has_plugin_line_breaks or main_debugger.has_plugin_exception_breaks):
                            can_skip = plugin_manager.can_skip(main_debugger, frame)

                        # CMD_STEP_OVER = 108, CMD_STEP_OVER_MY_CODE = 159
                        if can_skip and main_debugger.show_return_values and info.pydev_step_cmd in (108, 159) and frame.f_back is info.pydev_step_stop:
                            # trace function for showing return values after step over
                            can_skip = False

                # Let's check to see if we are in a function that has a breakpoint. If we don't have a breakpoint,
                # we will return nothing for the next trace
                # also, after we hit a breakpoint and go to some other debugging state, we have to force the set trace anyway,
                # so, that's why the additional checks are there.
                if not breakpoints_for_file:
                    if can_skip:
                        if has_exception_breakpoints:
                            return self.trace_exception
                        else:
                            if need_signature_trace_return:
                                return self.trace_return
                            else:
                                return None if is_call else NO_FTRACE

                else:
                    # When cached, 0 means we don't have a breakpoint and 1 means we have.
                    if can_skip:
                        breakpoints_in_line_cache = frame_skips_cache.get(line_cache_key, -1)
                        if breakpoints_in_line_cache == 0:
                            return self.trace_dispatch

                    breakpoints_in_frame_cache = frame_skips_cache.get(frame_cache_key, -1)
                    if breakpoints_in_frame_cache != -1:
                        # Gotten from cache.
                        has_breakpoint_in_frame = breakpoints_in_frame_cache == 1

                    else:
                        has_breakpoint_in_frame = False
                        # Checks the breakpoint to see if there is a context match in some function
                        curr_func_name = frame.f_code.co_name

                        # global context is set with an empty name
                        if curr_func_name in ('?', '<module>', '<lambda>'):
                            curr_func_name = ''

                        for breakpoint in dict_iter_values(breakpoints_for_file):  # jython does not support itervalues()
                            # will match either global or some function
                            if breakpoint.func_name in ('None', curr_func_name):
                                has_breakpoint_in_frame = True
                                break

                        # Cache the value (1 or 0 or -1 for default because of cython).
                        if has_breakpoint_in_frame:
                            frame_skips_cache[frame_cache_key] = 1
                        else:
                            frame_skips_cache[frame_cache_key] = 0

                    if can_skip and not has_breakpoint_in_frame:
                        if has_exception_breakpoints:
                            return self.trace_exception
                        else:
                            if need_signature_trace_return:
                                return self.trace_return
                            else:
                                return None if is_call else NO_FTRACE

            # We may have hit a breakpoint or we are already in step mode. Either way, let's check what we should do in this frame
            # if DEBUG: print('NOT skipped: %s %s %s %s' % (frame.f_lineno, frame.f_code.co_name, event, frame.__class__.__name__))

            try:
                flag = False
                # return is not taken into account for breakpoint hit because we'd have a double-hit in this case
                # (one for the line and the other for the return).

                stop_info = {}
                breakpoint = None
                exist_result = False
                stop = False
                bp_type = None
                if not is_return and info.pydev_state != STATE_SUSPEND and breakpoints_for_file is not None and line in breakpoints_for_file:
                    breakpoint = breakpoints_for_file[line]
                    new_frame = frame
                    stop = True
                    if step_cmd in (CMD_STEP_OVER, CMD_STEP_OVER_MY_CODE) and (stop_frame is frame and is_line):
                        stop = False  # we don't stop on breakpoint if we have to stop by step-over (it will be processed later)
                elif plugin_manager is not None and main_debugger.has_plugin_line_breaks:
                    result = plugin_manager.get_breakpoint(main_debugger, self, frame, event, self._args)
                    if result:
                        exist_result = True
                        flag, breakpoint, new_frame, bp_type = result

                if breakpoint:
                    # ok, hit breakpoint, now, we have to discover if it is a conditional breakpoint
                    # lets do the conditional stuff here
                    if stop or exist_result:
                        eval_result = False
                        if breakpoint.has_condition:
                            eval_result = main_debugger.handle_breakpoint_condition(info, breakpoint, new_frame)

                        if breakpoint.expression is not None:
                            main_debugger.handle_breakpoint_expression(breakpoint, info, new_frame)
                            if breakpoint.is_logpoint and info.pydev_message is not None and len(info.pydev_message) > 0:
                                cmd = main_debugger.cmd_factory.make_io_message(info.pydev_message + os.linesep, '1')
                                main_debugger.writer.add_command(cmd)

                        if breakpoint.has_condition:
                            if not eval_result:
                                return self.trace_dispatch
                        elif breakpoint.is_logpoint:
                            return self.trace_dispatch

                    if is_call and frame.f_code.co_name in ('<module>', '<lambda>'):
                        # If we find a call for a module, it means that the module is being imported/executed for the
                        # first time. In this case we have to ignore this hit as it may later duplicated by a
                        # line event at the same place (so, if there's a module with a print() in the first line
                        # the user will hit that line twice, which is not what we want).
                        #
                        # As for lambda, as it only has a single statement, it's not interesting to trace
                        # its call and later its line event as they're usually in the same line.

                        return self.trace_dispatch

                if main_debugger.show_return_values:
                    if is_return and info.pydev_step_cmd in (CMD_STEP_OVER, CMD_STEP_OVER_MY_CODE) and frame.f_back == info.pydev_step_stop:
                        self.show_return_values(frame, arg)

                elif main_debugger.remove_return_values_flag:
                    try:
                        self.remove_return_values(main_debugger, frame)
                    finally:
                        main_debugger.remove_return_values_flag = False

                if stop:
                    self.set_suspend(
                        thread,
                        CMD_SET_BREAK,
                        suspend_other_threads=breakpoint and breakpoint.suspend_policy == "ALL",
                    )

                elif flag and plugin_manager is not None:
                    result = plugin_manager.suspend(main_debugger, thread, frame, bp_type)
                    if result:
                        frame = result

                # if thread has a suspend flag, we suspend with a busy wait
                if info.pydev_state == STATE_SUSPEND:
                    self.do_wait_suspend(thread, frame, event, arg)
                    return self.trace_dispatch
                else:
                    if not breakpoint and is_line:
                        # No stop from anyone and no breakpoint found in line (cache that).
                        frame_skips_cache[line_cache_key] = 0

            except:
                traceback.print_exc()
                raise

            # step handling. We stop when we hit the right frame
            try:
                should_skip = 0
                if pydevd_dont_trace.should_trace_hook is not None:
                    if self.should_skip == -1:
                        # I.e.: cache the result on self.should_skip (no need to evaluate the same frame multiple times).
                        # Note that on a code reload, we won't re-evaluate this because in practice, the frame.f_code
                        # Which will be handled by this frame is read-only, so, we can cache it safely.
                        if not pydevd_dont_trace.should_trace_hook(frame, filename):
                            # -1, 0, 1 to be Cython-friendly
                            should_skip = self.should_skip = 1
                        else:
                            should_skip = self.should_skip = 0
                    else:
                        should_skip = self.should_skip

                plugin_stop = False
                if should_skip:
                    stop = False

                elif step_cmd in (CMD_STEP_INTO, CMD_STEP_INTO_MY_CODE):
                    force_check_project_scope = step_cmd == CMD_STEP_INTO_MY_CODE
                    if is_line:
                        if force_check_project_scope or main_debugger.is_files_filter_enabled:
                            stop = not main_debugger.apply_files_filter(frame, frame.f_code.co_filename, force_check_project_scope)
                        else:
                            stop = True

                    elif is_return and frame.f_back is not None:
                        if main_debugger.get_file_type(
                                get_abs_path_real_path_and_base_from_frame(frame.f_back)) == main_debugger.PYDEV_FILE:
                            stop = False
                        else:
                            if force_check_project_scope or main_debugger.is_files_filter_enabled:
                                stop = not main_debugger.apply_files_filter(frame.f_back, frame.f_back.f_code.co_filename, force_check_project_scope)
                            else:
                                stop = True

                    if plugin_manager is not None:
                        result = plugin_manager.cmd_step_into(main_debugger, frame, event, self._args, stop_info, stop)
                        if result:
                            stop, plugin_stop = result

                elif step_cmd in (CMD_STEP_OVER, CMD_STEP_OVER_MY_CODE):
                    # Note: when dealing with a step over my code it's the same as a step over (the
                    # difference is that when we return from a frame in one we go to regular step
                    # into and in the other we go to a step into my code).
                    stop = stop_frame is frame and is_line
                    # Note: don't stop on a return for step over, only for line events
                    # i.e.: don't stop in: (stop_frame is frame.f_back and is_return) as we'd stop twice in that line.

                    if frame.f_code.co_flags & CO_GENERATOR:
                        if is_return:
                            stop = False

                    if plugin_manager is not None:
                        result = plugin_manager.cmd_step_over(main_debugger, frame, event, self._args, stop_info, stop)
                        if result:
                            stop, plugin_stop = result

                elif step_cmd == CMD_SMART_STEP_INTO:
                    stop = False
                    if info.pydev_smart_step_stop is frame:
                        info.pydev_func_name = '.invalid.'  # Must match the type in cython
                        info.pydev_smart_step_stop = None

                    if is_line or is_exception_event:
                        curr_func_name = frame.f_code.co_name

                        # global context is set with an empty name
                        if curr_func_name in ('?', '<module>') or curr_func_name is None:
                            curr_func_name = ''

                        if curr_func_name == info.pydev_func_name:
                            stop = True

                elif step_cmd in (CMD_STEP_RETURN, CMD_STEP_RETURN_MY_CODE):
                    stop = is_return and stop_frame is frame

                else:
                    stop = False

                if stop and step_cmd != -1 and is_return and IS_PY3K and hasattr(frame, "f_back"):
                    f_code = getattr(frame.f_back, 'f_code', None)
                    if f_code is not None:
                        if main_debugger.get_file_type(
                                get_abs_path_real_path_and_base_from_file(f_code.co_filename)) == main_debugger.PYDEV_FILE:
                            stop = False

                if plugin_stop:
                    stopped_on_plugin = plugin_manager.stop(main_debugger, frame, event, self._args, stop_info, arg, step_cmd)
                elif stop:
                    if is_line:
                        self.set_suspend(thread, step_cmd)
                        self.do_wait_suspend(thread, frame, event, arg)
                    else:  # return event
                        back = frame.f_back
                        if back is not None:
                            # When we get to the pydevd run function, the debugging has actually finished for the main thread
                            # (note that it can still go on for other threads, but for this one, we just make it finish)
                            # So, just setting it to None should be OK
                            _, back_filename, base = get_abs_path_real_path_and_base_from_frame(back)
                            if (base, back.f_code.co_name) in (DEBUG_START, DEBUG_START_PY3K):
                                back = None

                            elif base == TRACE_PROPERTY:
                                # We dont want to trace the return event of pydevd_traceproperty (custom property for debugging)
                                # if we're in a return, we want it to appear to the user in the previous frame!
                                return None if is_call else NO_FTRACE

                            elif pydevd_dont_trace.should_trace_hook is not None:
                                if not pydevd_dont_trace.should_trace_hook(back, back_filename):
                                    # In this case, we'll have to skip the previous one because it shouldn't be traced.
                                    # Also, we have to reset the tracing, because if the parent's parent (or some
                                    # other parent) has to be traced and it's not currently, we wouldn't stop where
                                    # we should anymore (so, a step in/over/return may not stop anywhere if no parent is traced).
                                    # Related test: _debugger_case17a.py
                                    main_debugger.set_trace_for_frame_and_parents(back)
                                    return None if is_call else NO_FTRACE

                        if back is not None:
                            # if we're in a return, we want it to appear to the user in the previous frame!
                            self.set_suspend(thread, step_cmd)
                            self.do_wait_suspend(thread, back, event, arg)
                        else:
                            # in jython we may not have a back frame
                            info.pydev_step_stop = None
                            info.pydev_step_cmd = -1
                            info.pydev_state = STATE_RUN

            except KeyboardInterrupt:
                raise
            except:
                try:
                    traceback.print_exc()
                    info.pydev_step_cmd = -1
                except:
                    return None if is_call else NO_FTRACE

            # if we are quitting, let's stop the tracing
            if not main_debugger.quitting:
                return self.trace_dispatch
            else:
                return None if is_call else NO_FTRACE
        finally:
            info.is_tracing = False
Exemplo n.º 5
0
    def trace_dispatch(self, frame, event, arg):
    # ENDIF

        main_debugger, filename, info, thread = self._args
        try:
            # print 'frame trace_dispatch', frame.f_lineno, frame.f_code.co_name, event
            info.is_tracing = True
            need_trace_return = False

            if main_debugger._finish_debugging_session:
                return None

            if event == 'call' and main_debugger.signature_factory:
                need_trace_return = send_signature_call_trace(main_debugger, frame, filename)
            if event == 'return' and main_debugger.signature_factory:
                send_signature_return_trace(main_debugger, frame, filename, arg)

            plugin_manager = main_debugger.plugin

            is_exception_event = event == 'exception'
            has_exception_breakpoints = main_debugger.break_on_caught_exceptions or main_debugger.has_plugin_exception_breaks

            if is_exception_event:
                if has_exception_breakpoints:
                    flag, frame = self.should_stop_on_exception(frame, event, arg)
                    if flag:
                        self.handle_exception(frame, event, arg)
                        return self.trace_dispatch

            elif event not in ('line', 'call', 'return'):
                #I believe this can only happen in jython on some frontiers on jython and java code, which we don't want to trace.
                return None

            stop_frame = info.pydev_step_stop
            step_cmd = info.pydev_step_cmd

            if is_exception_event:
                breakpoints_for_file = None
                if stop_frame and stop_frame is not frame and step_cmd is CMD_STEP_OVER and \
                                arg[0] in (StopIteration, GeneratorExit) and arg[2] is None:
                    info.pydev_step_cmd = CMD_STEP_INTO
                    info.pydev_step_stop = None
            else:
                # If we are in single step mode and something causes us to exit the current frame, we need to make sure we break
                # eventually.  Force the step mode to step into and the step stop frame to None.
                # I.e.: F6 in the end of a function should stop in the next possible position (instead of forcing the user
                # to make a step in or step over at that location).
                # Note: this is especially troublesome when we're skipping code with the
                # @DontTrace comment.
                if stop_frame is frame and event is 'return' and step_cmd in (CMD_STEP_RETURN, CMD_STEP_OVER):
                    if not frame.f_code.co_flags & CO_GENERATOR:
                        info.pydev_step_cmd = CMD_STEP_INTO
                        info.pydev_step_stop = None

                breakpoints_for_file = main_debugger.breakpoints.get(filename)

                can_skip = False

                if info.pydev_state == STATE_RUN:
                    #we can skip if:
                    #- we have no stop marked
                    #- we should make a step return/step over and we're not in the current frame
                    can_skip = (step_cmd == -1 and stop_frame is None)\
                        or (step_cmd in (CMD_STEP_RETURN, CMD_STEP_OVER) and stop_frame is not frame)

                if can_skip and plugin_manager is not None and main_debugger.has_plugin_line_breaks:
                    can_skip = not plugin_manager.can_not_skip(main_debugger, self, frame)

                if can_skip and main_debugger.show_return_values:
                    # trace function for showing return values after step over
                    if info.pydev_step_cmd == CMD_STEP_OVER and hasattr(frame, "f_back") and frame.f_back == info.pydev_step_stop:
                        can_skip = False

                # Let's check to see if we are in a function that has a breakpoint. If we don't have a breakpoint,
                # we will return nothing for the next trace
                #also, after we hit a breakpoint and go to some other debugging state, we have to force the set trace anyway,
                #so, that's why the additional checks are there.
                if not breakpoints_for_file:
                    if can_skip:
                        if has_exception_breakpoints:
                            return self.trace_exception
                        else:
                            if need_trace_return:
                                return self.trace_return
                            else:
                                return None

                else:
                    #checks the breakpoint to see if there is a context match in some function
                    curr_func_name = frame.f_code.co_name

                    #global context is set with an empty name
                    if curr_func_name in ('?', '<module>'):
                        curr_func_name = ''

                    for breakpoint in dict_iter_values(breakpoints_for_file): #jython does not support itervalues()
                        #will match either global or some function
                        if breakpoint.func_name in ('None', curr_func_name):
                            break

                    else: # if we had some break, it won't get here (so, that's a context that we want to skip)
                        if can_skip:
                            if has_exception_breakpoints:
                                return self.trace_exception
                            else:
                                if need_trace_return:
                                    return self.trace_return
                                else:
                                    return None


            #We may have hit a breakpoint or we are already in step mode. Either way, let's check what we should do in this frame
            #print 'NOT skipped', frame.f_lineno, frame.f_code.co_name, event

            try:
                line = frame.f_lineno
                flag = False
                #return is not taken into account for breakpoint hit because we'd have a double-hit in this case
                #(one for the line and the other for the return).

                stop_info = {}
                breakpoint = None
                exist_result = False
                stop = False
                bp_type = None
                if not flag and event != 'return' and info.pydev_state != STATE_SUSPEND and breakpoints_for_file is not None \
                        and dict_contains(breakpoints_for_file, line):
                    breakpoint = breakpoints_for_file[line]
                    new_frame = frame
                    stop = True
                    if step_cmd == CMD_STEP_OVER and stop_frame is frame and event in ('line', 'return'):
                        stop = False #we don't stop on breakpoint if we have to stop by step-over (it will be processed later)
                elif plugin_manager is not None and main_debugger.has_plugin_line_breaks:
                    result = plugin_manager.get_breakpoint(main_debugger, self, frame, event, self._args)
                    if result:
                        exist_result = True
                        (flag, breakpoint, new_frame, bp_type) = result

                if breakpoint:
                    #ok, hit breakpoint, now, we have to discover if it is a conditional breakpoint
                    # lets do the conditional stuff here
                    if stop or exist_result:
                        condition = breakpoint.condition
                        if condition is not None:
                            try:
                                val = eval(condition, new_frame.f_globals, new_frame.f_locals)
                                if not val:
                                    return self.trace_dispatch

                            except:
                                if type(condition) != type(''):
                                    if hasattr(condition, 'encode'):
                                        condition = condition.encode('utf-8')

                                msg = 'Error while evaluating expression: %s\n' % (condition,)
                                sys.stderr.write(msg)
                                traceback.print_exc()
                                if not main_debugger.suspend_on_breakpoint_exception:
                                    return self.trace_dispatch
                                else:
                                    stop = True
                                    try:
                                        # add exception_type and stacktrace into thread additional info
                                        etype, value, tb = sys.exc_info()
                                        try:
                                            error = ''.join(traceback.format_exception_only(etype, value))
                                            stack = traceback.extract_stack(f=tb.tb_frame.f_back)

                                            # On self.set_suspend(thread, CMD_SET_BREAK) this info will be
                                            # sent to the client.
                                            info.conditional_breakpoint_exception = \
                                                ('Condition:\n' + condition + '\n\nError:\n' + error, stack)
                                        finally:
                                            etype, value, tb = None, None, None
                                    except:
                                        traceback.print_exc()

                        if breakpoint.expression is not None:
                            try:
                                try:
                                    val = eval(breakpoint.expression, new_frame.f_globals, new_frame.f_locals)
                                except:
                                    val = sys.exc_info()[1]
                            finally:
                                if val is not None:
                                    info.pydev_message = str(val)

                        if not main_debugger.first_breakpoint_reached:
                            if event == 'call':
                                if hasattr(frame, 'f_back'):
                                    back = frame.f_back
                                    if back is not None:
                                        # When we start debug session, we call execfile in pydevd run function. It produces an additional
                                        # 'call' event for tracing and we stop on the first line of code twice.
                                        _, back_filename, base = get_abs_path_real_path_and_base_from_frame(back)
                                        if (base == DEBUG_START[0] and back.f_code.co_name == DEBUG_START[1]) or \
                                                (base == DEBUG_START_PY3K[0] and back.f_code.co_name == DEBUG_START_PY3K[1]):
                                            stop = False
                                            main_debugger.first_breakpoint_reached = True
                else:
                    # if the frame is traced after breakpoint stop,
                    # but the file should be ignored while stepping because of filters
                    if step_cmd != -1:
                        if main_debugger.is_filter_enabled and main_debugger.is_ignored_by_filters(filename):
                            # ignore files matching stepping filters
                            return self.trace_dispatch
                        if main_debugger.is_filter_libraries and main_debugger.not_in_scope(filename):
                            # ignore library files while stepping
                            return self.trace_dispatch

                if main_debugger.show_return_values or main_debugger.remove_return_values_flag:
                    self.manage_return_values(main_debugger, frame, event, arg)

                if stop:
                    self.set_suspend(thread, CMD_SET_BREAK)
                elif flag and plugin_manager is not None:
                    result = plugin_manager.suspend(main_debugger, thread, frame, bp_type)
                    if result:
                        frame = result

                # if thread has a suspend flag, we suspend with a busy wait
                if info.pydev_state == STATE_SUSPEND:
                    self.do_wait_suspend(thread, frame, event, arg)
                    return self.trace_dispatch

            except:
                traceback.print_exc()
                raise

            #step handling. We stop when we hit the right frame
            try:
                should_skip = 0
                if pydevd_dont_trace.should_trace_hook is not None:
                    if self.should_skip == -1:
                        # I.e.: cache the result on self.should_skip (no need to evaluate the same frame multiple times).
                        # Note that on a code reload, we won't re-evaluate this because in practice, the frame.f_code
                        # Which will be handled by this frame is read-only, so, we can cache it safely.
                        if not pydevd_dont_trace.should_trace_hook(frame, filename):
                            # -1, 0, 1 to be Cython-friendly
                            should_skip = self.should_skip = 1
                        else:
                            should_skip = self.should_skip = 0
                    else:
                        should_skip = self.should_skip

                plugin_stop = False
                if should_skip:
                    stop = False

                elif step_cmd == CMD_STEP_INTO:
                    stop = event in ('line', 'return')
                    if plugin_manager is not None:
                        result = plugin_manager.cmd_step_into(main_debugger, frame, event, self._args, stop_info, stop)
                        if result:
                            stop, plugin_stop = result

                elif step_cmd == CMD_STEP_INTO_MY_CODE:
                    if not main_debugger.not_in_scope(frame.f_code.co_filename):
                        stop = event == 'line'

                elif step_cmd == CMD_STEP_OVER:
                    stop = stop_frame is frame and event in ('line', 'return')

                    if frame.f_code.co_flags & CO_GENERATOR:
                        if event is 'return':
                            stop = False

                    if plugin_manager is not None:
                        result = plugin_manager.cmd_step_over(main_debugger, frame, event, self._args, stop_info, stop)
                        if result:
                            stop, plugin_stop = result

                elif step_cmd == CMD_SMART_STEP_INTO:
                    stop = False
                    if info.pydev_smart_step_stop is frame:
                        info.pydev_func_name = '.invalid.' # Must match the type in cython
                        info.pydev_smart_step_stop = None

                    if event == 'line' or event == 'exception':
                        curr_func_name = frame.f_code.co_name

                        #global context is set with an empty name
                        if curr_func_name in ('?', '<module>') or curr_func_name is None:
                            curr_func_name = ''

                        if curr_func_name == info.pydev_func_name:
                            stop = True

                elif step_cmd == CMD_STEP_RETURN:
                    stop = event == 'return' and stop_frame is frame

                elif step_cmd == CMD_RUN_TO_LINE or step_cmd == CMD_SET_NEXT_STATEMENT:
                    stop = False

                    if event == 'line' or event == 'exception':
                        #Yes, we can only act on line events (weird hum?)
                        #Note: This code is duplicated at pydevd.py
                        #Acting on exception events after debugger breaks with exception
                        curr_func_name = frame.f_code.co_name

                        #global context is set with an empty name
                        if curr_func_name in ('?', '<module>'):
                            curr_func_name = ''

                        if curr_func_name == info.pydev_func_name:
                            line = info.pydev_next_line
                            if frame.f_lineno == line:
                                stop = True
                            else:
                                if frame.f_trace is None:
                                    frame.f_trace = self.trace_dispatch
                                frame.f_lineno = line
                                frame.f_trace = None
                                stop = True

                else:
                    stop = False

                if stop and step_cmd != -1 and IS_PY3K:
                    # in Py3k we start script via our custom `execfile` function, and we shouldn't stop there
                    # while stepping when execution is finished
                    if event == 'return' and hasattr(frame, "f_back") and hasattr(frame.f_back, "f_code"):
                        back_filename = os.path.basename(frame.f_back.f_code.co_filename)
                        file_type = get_file_type(back_filename)
                        if file_type == PYDEV_FILE:
                            stop = False

                if plugin_stop:
                    stopped_on_plugin = plugin_manager.stop(main_debugger, frame, event, self._args, stop_info, arg, step_cmd)
                elif stop:
                    if event == 'line':
                        self.set_suspend(thread, step_cmd)
                        self.do_wait_suspend(thread, frame, event, arg)
                    else: #return event
                        back = frame.f_back
                        if back is not None:
                            #When we get to the pydevd run function, the debugging has actually finished for the main thread
                            #(note that it can still go on for other threads, but for this one, we just make it finish)
                            #So, just setting it to None should be OK
                            _, back_filename, base = get_abs_path_real_path_and_base_from_frame(back)
                            if base == DEBUG_START[0] and back.f_code.co_name == DEBUG_START[1]:
                                back = None

                            elif base == TRACE_PROPERTY:
                                # We dont want to trace the return event of pydevd_traceproperty (custom property for debugging)
                                #if we're in a return, we want it to appear to the user in the previous frame!
                                return None

                            elif pydevd_dont_trace.should_trace_hook is not None:
                                if not pydevd_dont_trace.should_trace_hook(back, back_filename):
                                    # In this case, we'll have to skip the previous one because it shouldn't be traced.
                                    # Also, we have to reset the tracing, because if the parent's parent (or some
                                    # other parent) has to be traced and it's not currently, we wouldn't stop where
                                    # we should anymore (so, a step in/over/return may not stop anywhere if no parent is traced).
                                    # Related test: _debugger_case17a.py
                                    main_debugger.set_trace_for_frame_and_parents(back, overwrite_prev_trace=True)
                                    return None

                        if back is not None:
                            #if we're in a return, we want it to appear to the user in the previous frame!
                            self.set_suspend(thread, step_cmd)
                            self.do_wait_suspend(thread, back, event, arg)
                        else:
                            #in jython we may not have a back frame
                            info.pydev_step_stop = None
                            info.pydev_step_cmd = -1
                            info.pydev_state = STATE_RUN

            except KeyboardInterrupt:
                raise
            except:
                try:
                    traceback.print_exc()
                    info.pydev_step_cmd = -1
                except:
                    return None

            #if we are quitting, let's stop the tracing
            retVal = None
            if not main_debugger.quitting:
                retVal = self.trace_dispatch

            return retVal
        finally:
            info.is_tracing = False