Thu, 06 Oct 2016 22:51:04 +0200
Make attachThread and dumpThreadList runnable again.
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Relocated some methods from Debug*Thread and the remaining modules into a new one.
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1  # * coding: utf8 * 
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2  
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3  # Copyright (c) 2014  2016 Detlev Offenbach <detlev@dieoffenbachs.de> 
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4  # 
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5  
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6  """ 
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7  Module implementing an import hook patching thread modules to get debugged too. 
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8  """ 
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9  
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10  import os.path 
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11  import sys 
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12  
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13  if sys.version_info[0] == 2: 
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14  import thread as _thread 
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15  else: 
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16  import _thread 
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17  
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18  import threading 
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19  
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20  from DebugBase import DebugBase 
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21  
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22  
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23  class ThreadExtension(object): 
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24  """ 
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25  Class implementing the thread support for the debugger. 
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26  
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27  Provides methods for intercepting thread creation, retriving the running 
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28  threads and their name and state. 
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29  """ 
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30  def __init__(self): 
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31  """ 
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32  Constructor 
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33  """ 
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34  self.threadNumber = 1 
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35  self._original_start_new_thread = None 
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36  
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37  self.clientLock = threading.RLock() 
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38  
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39  # dictionary of all threads running {id: DebugBase} 
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40  self.threads = {_thread.get_ident(): self} 
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41  
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42  # the "current" thread, basically for variables view 
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43  self.currentThread = self 
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44  
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45  # special objects representing the main scripts thread and frame 
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46  self.mainThread = self 
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47  
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48  if sys.version_info[0] == 2: 
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49  self.threadModName = 'thread' 
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50  else: 
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51  self.threadModName = '_thread' 
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52  
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53  # reset already imported thread module to apply hooks at next import 
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54  del sys.modules[self.threadModName] 
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55  del sys.modules['threading'] 
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56  
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57  # provide a hook to perform a hard breakpoint 
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58  # Use it like this: 
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59  # if hasattr(sys, 'breakpoint): sys.breakpoint() 
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60  sys.breakpoint = self.set_trace 
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61  
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62  def attachThread(self, target=None, args=None, kwargs={}, 
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63  mainThread=False): 
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64  """ 
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65  Public method to setup a standard thread for DebugClient to debug. 
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66  
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67  If mainThread is True, then we are attaching to the already 
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68  started mainthread of the app and the rest of the args are ignored. 
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69  
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70  @param target the start function of the target thread (i.e. the user 
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71  code) 
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72  @param args arguments to pass to target 
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73  @param kwargs keyword arguments to pass to target 
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74  @param mainThread True, if we are attaching to the already 
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75  started mainthread of the app 
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76  @return identifier of the created thread 
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77  """ 
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78  if mainThread: 
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79  ident = _thread.get_ident() 
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80  name = 'MainThread' 
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81  newThread = self.mainThread 
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82  newThread._mainThread = True 
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83  if self.debugging: 
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84  sys.setprofile(newThread.profile) 
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85  
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86  else: 
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87  newThread = DebugBase(self) 
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88  ident = self._original_start_new_thread( 
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89  newThread.bootstrap, (target, args, kwargs)) 
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90  name = 'Thread{0}'.format(self.threadNumber) 
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91  self.threadNumber += 1 
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92  
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93  newThread.id = ident 
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94  newThread.name = name 
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95  
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96  self.threads[ident] = newThread 
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97  
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98  return ident 
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99  
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100  def threadTerminated(self, dbgThread): 
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101  """ 
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102  Public method called when a DebugThread has exited. 
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103  
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104  @param dbgThread the DebugThread that has exited 
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105  """ 
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106  self.lockClient() 
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107  try: 
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108  del self.threads[dbgThread.get_ident()] 
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109  except KeyError: 
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110  pass 
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111  finally: 
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112  self.unlockClient() 
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113  
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114  def lockClient(self, blocking=True): 
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115  """ 
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116  Public method to acquire the lock for this client. 
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117  
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118  @param blocking flag to indicating a blocking lock 
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119  @type bool 
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120  @return flag indicating successful locking 
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121  @rtype bool 
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122  """ 
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123  if blocking: 
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124  self.clientLock.acquire() 
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125  else: 
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126  return self.clientLock.acquire(blocking) 
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127  
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128  def unlockClient(self): 
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129  """ 
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130  Public method to release the lock for this client. 
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131  """ 
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132  try: 
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133  self.clientLock.release() 
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134  except AssertionError: 
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135  pass 
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136  
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137  def setCurrentThread(self, id): 
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138  """ 
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139  Public method to set the current thread. 
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140  
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141  @param id the id the current thread should be set to. 
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142  """ 
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143  try: 
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144  self.lockClient() 
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145  if id is None or id not in self.threads: 
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146  self.currentThread = None 
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147  else: 
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148  self.currentThread = self.threads[id] 
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149  finally: 
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150  self.unlockClient() 
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151  
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152  def dumpThreadList(self): 
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153  """ 
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154  Public method to send the list of threads. 
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155  """ 
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156  threadList = [] 
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157  if len(self.threads) > 1: 
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158  currentId = _thread.get_ident() 
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159  # update thread names set by user (threading.setName) 
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160  threadNames = {t.ident: t.getName() for t in threading.enumerate()} 
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161  
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162  for id, thd in self.threads.items(): 
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163  d = {"id": id} 
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164  try: 
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165  d["name"] = threadNames.get(id, thd.name) 
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166  d["broken"] = thd.isBroken 
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167  except Exception: 
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168  d["name"] = 'UnknownThread' 
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169  d["broken"] = False 
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170  
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171  threadList.append(d) 
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172  else: 
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173  currentId = 1 
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174  d = {"id": 1} 
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175  d["name"] = "MainThread" 
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176  d["broken"] = self.isBroken 
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177  threadList.append(d) 
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178  
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179  self.sendJsonCommand("ResponseThreadList", { 
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180  "currentID": currentId, 
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181  "threadList": threadList, 
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182  }) 
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183  
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184  
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185  # 
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186  # eflag: noqa = M702 