DebugClients/Python/DebugThread.py

Mon, 28 Dec 2009 16:03:33 +0000

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Mon, 28 Dec 2009 16:03:33 +0000
changeset 0
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child 13
1af94a91f439
permissions
-rw-r--r--

Started porting eric4 to Python3

0
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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2002 - 2009 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing the debug thread.
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8 """
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9
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10 import bdb
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11 import os
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12 import sys
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13
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14 from DebugBase import *
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15
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16 class DebugThread(DebugBase):
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17 """
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18 Class implementing a debug thread.
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19
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20 It represents a thread in the python interpreter that we are tracing.
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21
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22 Provides simple wrapper methods around bdb for the 'owning' client to
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23 call to step etc.
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24 """
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25 def __init__(self, dbgClient, targ = None, args = None, kwargs = None,
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26 mainThread = 0):
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27 """
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28 Constructor
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29
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30 @param dbgClient the owning client
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31 @param targ the target method in the run thread
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32 @param args arguments to be passed to the thread
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33 @param kwargs arguments to be passed to the thread
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34 @param mainThread 0 if this thread is not the mainscripts thread
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35 """
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36 DebugBase.__init__(self, dbgClient)
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37
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38 self._target = targ
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39 self._args = args
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40 self._kwargs = kwargs
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41 self._mainThread = mainThread
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42 # thread running tracks execution state of client code
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43 # it will always be 0 for main thread as that is tracked
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44 # by DebugClientThreads and Bdb...
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45 self._threadRunning = 0
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46
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47 self.__ident = None # id of this thread.
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48 self.__name = ""
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49
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50 def set_ident(self, id):
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51 """
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52 Public method to set the id for this thread.
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53
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54 @param id id for this thread (int)
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55 """
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56 self.__ident = id
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57
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58 def get_ident(self):
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59 """
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60 Public method to return the id of this thread.
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61
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62 @return the id of this thread (int)
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63 """
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64 return self.__ident
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65
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66 def get_name(self):
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67 """
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68 Public method to return the name of this thread.
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69
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70 @return name of this thread (string)
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71 """
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72 return self.__name
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73
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74 def traceThread(self):
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75 """
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76 Private method to setup tracing for this thread.
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77 """
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78 self.set_trace()
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79 if not self._mainThread:
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80 self.set_continue(0)
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81
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82 def bootstrap(self):
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83 """
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84 Private method to bootstrap the thread.
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85
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86 It wraps the call to the user function to enable tracing
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87 before hand.
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88 """
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89 try:
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90 try:
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91 self._threadRunning = 1
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92 self.traceThread()
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93 self._target(*self._args, **self._kwargs)
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94 except bdb.BdbQuit:
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95 pass
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96 finally:
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97 self._threadRunning = 0
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98 self.quitting = 1
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99 self._dbgClient.threadTerminated(self)
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100 sys.settrace(None)
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101 sys.setprofile(None)
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102
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103 def trace_dispatch(self, frame, event, arg):
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104 """
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105 Private method wrapping the trace_dispatch of bdb.py.
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106
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107 It wraps the call to dispatch tracing into
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108 bdb to make sure we have locked the client to prevent multiple
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109 threads from entering the client event loop.
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110
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111 @param frame The current stack frame.
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112 @param event The trace event (string)
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113 @param arg The arguments
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114 @return local trace function
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115 """
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116 try:
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117 self._dbgClient.lockClient()
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118 # if this thread came out of a lock, and we are quitting
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119 # and we are still running, then get rid of tracing for this thread
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120 if self.quitting and self._threadRunning:
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121 sys.settrace(None)
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122 sys.setprofile(None)
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123 import threading
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124 self.__name = threading.currentThread().getName()
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125 retval = DebugBase.trace_dispatch(self, frame, event, arg)
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126 finally:
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127 self._dbgClient.unlockClient()
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128
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129 return retval

eric ide

mercurial