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comparison: DebugClients/Python3/DebugThread.py
DebugClients/Python3/DebugThread.py
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the debug thread. | |
| 8 """ | |
| 9 | |
| 10 import bdb | |
| 11 import os | |
| 12 import sys | |
| 13 | |
| 14 from DebugBase import * | |
| 15 | |
| 16 class DebugThread(DebugBase): | |
| 17 """ | |
| 18 Class implementing a debug thread. | |
| 19 | |
| 20 It represents a thread in the python interpreter that we are tracing. | |
| 21 | |
| 22 Provides simple wrapper methods around bdb for the 'owning' client to | |
| 23 call to step etc. | |
| 24 """ | |
| 25 def __init__(self, dbgClient, targ = None, args = None, kwargs = None, | |
| 26 mainThread = False): | |
| 27 """ | |
| 28 Constructor | |
| 29 | |
| 30 @param dbgClient the owning client | |
| 31 @param targ the target method in the run thread | |
| 32 @param args arguments to be passed to the thread | |
| 33 @param kwargs arguments to be passed to the thread | |
| 34 @param mainThread 0 if this thread is not the mainscripts thread | |
| 35 """ | |
| 36 DebugBase.__init__(self, dbgClient) | |
| 37 | |
| 38 self._target = targ | |
| 39 self._args = args | |
| 40 self._kwargs = kwargs | |
| 41 self._mainThread = mainThread | |
| 42 # thread running tracks execution state of client code | |
| 43 # it will always be False for main thread as that is tracked | |
| 44 # by DebugClientThreads and Bdb... | |
| 45 self._threadRunning = False | |
| 46 | |
| 47 self.__ident = None # id of this thread. | |
| 48 self.__name = "" | |
| 49 | |
| 50 def set_ident(self, id): | |
| 51 """ | |
| 52 Public method to set the id for this thread. | |
| 53 | |
| 54 @param id id for this thread (int) | |
| 55 """ | |
| 56 self.__ident = id | |
| 57 | |
| 58 def get_ident(self): | |
| 59 """ | |
| 60 Public method to return the id of this thread. | |
| 61 | |
| 62 @return the id of this thread (int) | |
| 63 """ | |
| 64 return self.__ident | |
| 65 | |
| 66 def get_name(self): | |
| 67 """ | |
| 68 Public method to return the name of this thread. | |
| 69 | |
| 70 @return name of this thread (string) | |
| 71 """ | |
| 72 return self.__name | |
| 73 | |
| 74 def traceThread(self): | |
| 75 """ | |
| 76 Private method to setup tracing for this thread. | |
| 77 """ | |
| 78 self.set_trace() | |
| 79 if not self._mainThread: | |
| 80 self.set_continue(False) | |
| 81 | |
| 82 def bootstrap(self): | |
| 83 """ | |
| 84 Private method to bootstrap the thread. | |
| 85 | |
| 86 It wraps the call to the user function to enable tracing | |
| 87 before hand. | |
| 88 """ | |
| 89 try: | |
| 90 self._threadRunning = True | |
| 91 self.traceThread() | |
| 92 self._target(*self._args, **self._kwargs) | |
| 93 except bdb.BdbQuit: | |
| 94 pass | |
| 95 finally: | |
| 96 self._threadRunning = False | |
| 97 self.quitting = True | |
| 98 self._dbgClient.threadTerminated(self) | |
| 99 sys.settrace(None) | |
| 100 sys.setprofile(None) | |
| 101 | |
| 102 def trace_dispatch(self, frame, event, arg): | |
| 103 """ | |
| 104 Private method wrapping the trace_dispatch of bdb.py. | |
| 105 | |
| 106 It wraps the call to dispatch tracing into | |
| 107 bdb to make sure we have locked the client to prevent multiple | |
| 108 threads from entering the client event loop. | |
| 109 | |
| 110 @param frame The current stack frame. | |
| 111 @param event The trace event (string) | |
| 112 @param arg The arguments | |
| 113 @return local trace function | |
| 114 """ | |
| 115 try: | |
| 116 self._dbgClient.lockClient() | |
| 117 # if this thread came out of a lock, and we are quitting | |
| 118 # and we are still running, then get rid of tracing for this thread | |
| 119 if self.quitting and self._threadRunning: | |
| 120 sys.settrace(None) | |
| 121 sys.setprofile(None) | |
| 122 import threading | |
| 123 self.__name = threading.current_thread().name | |
| 124 retval = DebugBase.trace_dispatch(self, frame, event, arg) | |
| 125 finally: | |
| 126 self._dbgClient.unlockClient() | |
| 127 | |
| 128 return retval |
