Mercurial > cpython-lru_cache-weakref

annotate Lib/idlelib/RemoteDebugger.py @ 79691:05c8928362ee

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Merge __next__ method link fixes with 3.3.
author Ezio Melotti <ezio.melotti@gmail.com>
date Fri, 12 Oct 2012 13:46:37 +0300
parents 7dd2c1746267
children
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rev   line source
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1 """Support for remote Python debugging.
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2
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3 Some ASCII art to describe the structure:
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4
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5 IN PYTHON SUBPROCESS # IN IDLE PROCESS
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6 #
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7 # oid='gui_adapter'
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8 +----------+ # +------------+ +-----+
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9 | GUIProxy |--remote#call-->| GUIAdapter |--calls-->| GUI |
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10 +-----+--calls-->+----------+ # +------------+ +-----+
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11 | Idb | # /
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12 +-----+<-calls--+------------+ # +----------+<--calls-/
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13 | IdbAdapter |<--remote#call--| IdbProxy |
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14 +------------+ # +----------+
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15 oid='idb_adapter' #
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16
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17 The purpose of the Proxy and Adapter classes is to translate certain
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18 arguments and return values that cannot be transported through the RPC
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19 barrier, in particular frame and traceback objects.
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20
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21 """
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22
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23 import types
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24 from idlelib import rpc
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25 from idlelib import Debugger
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26
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27 debugging = 0
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28
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29 idb_adap_oid = "idb_adapter"
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30 gui_adap_oid = "gui_adapter"
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31
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32 #=======================================
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33 #
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34 # In the PYTHON subprocess:
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35
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36 frametable = {}
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37 dicttable = {}
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38 codetable = {}
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39 tracebacktable = {}
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40
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41 def wrap_frame(frame):
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42 fid = id(frame)
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43 frametable[fid] = frame
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44 return fid
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45
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46 def wrap_info(info):
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47 "replace info[2], a traceback instance, by its ID"
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48 if info is None:
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49 return None
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50 else:
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51 traceback = info[2]
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52 assert isinstance(traceback, types.TracebackType)
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53 traceback_id = id(traceback)
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54 tracebacktable[traceback_id] = traceback
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55 modified_info = (info[0], info[1], traceback_id)
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56 return modified_info
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57
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58 class GUIProxy:
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59
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60 def __init__(self, conn, gui_adap_oid):
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61 self.conn = conn
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62 self.oid = gui_adap_oid
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63
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64 def interaction(self, message, frame, info=None):
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65 # calls rpc.SocketIO.remotecall() via run.MyHandler instance
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66 # pass frame and traceback object IDs instead of the objects themselves
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67 self.conn.remotecall(self.oid, "interaction",
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68 (message, wrap_frame(frame), wrap_info(info)),
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69 {})
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70
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71 class IdbAdapter:
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72
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73 def __init__(self, idb):
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74 self.idb = idb
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75
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76 #----------called by an IdbProxy----------
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77
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78 def set_step(self):
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79 self.idb.set_step()
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80
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81 def set_quit(self):
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82 self.idb.set_quit()
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83
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84 def set_continue(self):
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85 self.idb.set_continue()
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86
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87 def set_next(self, fid):
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88 frame = frametable[fid]
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89 self.idb.set_next(frame)
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90
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91 def set_return(self, fid):
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92 frame = frametable[fid]
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93 self.idb.set_return(frame)
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94
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95 def get_stack(self, fid, tbid):
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96 frame = frametable[fid]
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97 if tbid is None:
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98 tb = None
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99 else:
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100 tb = tracebacktable[tbid]
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101 stack, i = self.idb.get_stack(frame, tb)
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102 stack = [(wrap_frame(frame), k) for frame, k in stack]
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103 return stack, i
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104
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105 def run(self, cmd):
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106 import __main__
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107 self.idb.run(cmd, __main__.__dict__)
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108
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109 def set_break(self, filename, lineno):
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110 msg = self.idb.set_break(filename, lineno)
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111 return msg
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112
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113 def clear_break(self, filename, lineno):
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114 msg = self.idb.clear_break(filename, lineno)
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115 return msg
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116
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117 def clear_all_file_breaks(self, filename):
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118 msg = self.idb.clear_all_file_breaks(filename)
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119 return msg
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120
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121 #----------called by a FrameProxy----------
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122
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123 def frame_attr(self, fid, name):
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124 frame = frametable[fid]
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125 return getattr(frame, name)
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126
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127 def frame_globals(self, fid):
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128 frame = frametable[fid]
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129 dict = frame.f_globals
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130 did = id(dict)
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131 dicttable[did] = dict
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132 return did
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133
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134 def frame_locals(self, fid):
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135 frame = frametable[fid]
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136 dict = frame.f_locals
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137 did = id(dict)
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138 dicttable[did] = dict
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139 return did
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140
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141 def frame_code(self, fid):
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142 frame = frametable[fid]
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143 code = frame.f_code
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144 cid = id(code)
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145 codetable[cid] = code
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146 return cid
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147
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148 #----------called by a CodeProxy----------
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149
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150 def code_name(self, cid):
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151 code = codetable[cid]
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152 return code.co_name
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153
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154 def code_filename(self, cid):
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155 code = codetable[cid]
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156 return code.co_filename
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157
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158 #----------called by a DictProxy----------
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159
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160 def dict_keys(self, did):
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161 raise NotImplemented("dict_keys not public or pickleable")
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162 ## dict = dicttable[did]
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163 ## return dict.keys()
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164
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165 ### Needed until dict_keys is type is finished and pickealable.
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166 ### Will probably need to extend rpc.py:SocketIO._proxify at that time.
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167 def dict_keys_list(self, did):
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168 dict = dicttable[did]
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169 return list(dict.keys())
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170
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171 def dict_item(self, did, key):
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172 dict = dicttable[did]
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173 value = dict[key]
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174 value = repr(value) ### can't pickle module 'builtins'
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175 return value
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176
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177 #----------end class IdbAdapter----------
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178
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179
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180 def start_debugger(rpchandler, gui_adap_oid):
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181 """Start the debugger and its RPC link in the Python subprocess
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182
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183 Start the subprocess side of the split debugger and set up that side of the
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184 RPC link by instantiating the GUIProxy, Idb debugger, and IdbAdapter
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185 objects and linking them together. Register the IdbAdapter with the
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186 RPCServer to handle RPC requests from the split debugger GUI via the
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187 IdbProxy.
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188
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189 """
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190 gui_proxy = GUIProxy(rpchandler, gui_adap_oid)
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191 idb = Debugger.Idb(gui_proxy)
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192 idb_adap = IdbAdapter(idb)
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193 rpchandler.register(idb_adap_oid, idb_adap)
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194 return idb_adap_oid
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195
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196
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197 #=======================================
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198 #
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199 # In the IDLE process:
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200
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201
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202 class FrameProxy:
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203
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204 def __init__(self, conn, fid):
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205 self._conn = conn
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206 self._fid = fid
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207 self._oid = "idb_adapter"
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208 self._dictcache = {}
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209
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210 def __getattr__(self, name):
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211 if name[:1] == "_":
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212 raise AttributeError(name)
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213 if name == "f_code":
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214 return self._get_f_code()
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215 if name == "f_globals":
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216 return self._get_f_globals()
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217 if name == "f_locals":
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218 return self._get_f_locals()
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219 return self._conn.remotecall(self._oid, "frame_attr",
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220 (self._fid, name), {})
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221
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222 def _get_f_code(self):
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223 cid = self._conn.remotecall(self._oid, "frame_code", (self._fid,), {})
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224 return CodeProxy(self._conn, self._oid, cid)
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225
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226 def _get_f_globals(self):
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227 did = self._conn.remotecall(self._oid, "frame_globals",
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228 (self._fid,), {})
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229 return self._get_dict_proxy(did)
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230
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231 def _get_f_locals(self):
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232 did = self._conn.remotecall(self._oid, "frame_locals",
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233 (self._fid,), {})
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234 return self._get_dict_proxy(did)
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235
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236 def _get_dict_proxy(self, did):
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237 if did in self._dictcache:
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238 return self._dictcache[did]
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239 dp = DictProxy(self._conn, self._oid, did)
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240 self._dictcache[did] = dp
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241 return dp
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242
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243
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244 class CodeProxy:
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245
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246 def __init__(self, conn, oid, cid):
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247 self._conn = conn
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248 self._oid = oid
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249 self._cid = cid
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250
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251 def __getattr__(self, name):
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252 if name == "co_name":
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253 return self._conn.remotecall(self._oid, "code_name",
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254 (self._cid,), {})
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255 if name == "co_filename":
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256 return self._conn.remotecall(self._oid, "code_filename",
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257 (self._cid,), {})
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258
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259
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260 class DictProxy:
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261
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262 def __init__(self, conn, oid, did):
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263 self._conn = conn
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264 self._oid = oid
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265 self._did = did
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266
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267 ## def keys(self):
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268 ## return self._conn.remotecall(self._oid, "dict_keys", (self._did,), {})
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269
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270 # 'temporary' until dict_keys is a pickleable built-in type
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271 def keys(self):
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272 return self._conn.remotecall(self._oid,
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273 "dict_keys_list", (self._did,), {})
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274
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275 def __getitem__(self, key):
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276 return self._conn.remotecall(self._oid, "dict_item",
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277 (self._did, key), {})
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278
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279 def __getattr__(self, name):
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280 ##print("*** Failed DictProxy.__getattr__:", name)
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281 raise AttributeError(name)
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282
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283
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284 class GUIAdapter:
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285
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286 def __init__(self, conn, gui):
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287 self.conn = conn
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288 self.gui = gui
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289
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290 def interaction(self, message, fid, modified_info):
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291 ##print("*** Interaction: (%s, %s, %s)" % (message, fid, modified_info))
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292 frame = FrameProxy(self.conn, fid)
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293 self.gui.interaction(message, frame, modified_info)
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294
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295
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296 class IdbProxy:
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297
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298 def __init__(self, conn, shell, oid):
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299 self.oid = oid
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300 self.conn = conn
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301 self.shell = shell
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302
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303 def call(self, methodname, *args, **kwargs):
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304 ##print("*** IdbProxy.call %s %s %s" % (methodname, args, kwargs))
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305 value = self.conn.remotecall(self.oid, methodname, args, kwargs)
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306 ##print("*** IdbProxy.call %s returns %r" % (methodname, value))
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307 return value
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308
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309 def run(self, cmd, locals):
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310 # Ignores locals on purpose!
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311 seq = self.conn.asyncqueue(self.oid, "run", (cmd,), {})
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312 self.shell.interp.active_seq = seq
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313
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314 def get_stack(self, frame, tbid):
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315 # passing frame and traceback IDs, not the objects themselves
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316 stack, i = self.call("get_stack", frame._fid, tbid)
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317 stack = [(FrameProxy(self.conn, fid), k) for fid, k in stack]
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318 return stack, i
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319
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320 def set_continue(self):
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321 self.call("set_continue")
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322
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323 def set_step(self):
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324 self.call("set_step")
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325
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326 def set_next(self, frame):
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327 self.call("set_next", frame._fid)
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328
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329 def set_return(self, frame):
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330 self.call("set_return", frame._fid)
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331
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332 def set_quit(self):
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333 self.call("set_quit")
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334
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335 def set_break(self, filename, lineno):
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336 msg = self.call("set_break", filename, lineno)
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337 return msg
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338
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339 def clear_break(self, filename, lineno):
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340 msg = self.call("clear_break", filename, lineno)
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341 return msg
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342
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343 def clear_all_file_breaks(self, filename):
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344 msg = self.call("clear_all_file_breaks", filename)
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345 return msg
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346
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347 def start_remote_debugger(rpcclt, pyshell):
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348 """Start the subprocess debugger, initialize the debugger GUI and RPC link
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349
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350 Request the RPCServer start the Python subprocess debugger and link. Set
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351 up the Idle side of the split debugger by instantiating the IdbProxy,
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352 debugger GUI, and debugger GUIAdapter objects and linking them together.
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353
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354 Register the GUIAdapter with the RPCClient to handle debugger GUI
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355 interaction requests coming from the subprocess debugger via the GUIProxy.
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356
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357 The IdbAdapter will pass execution and environment requests coming from the
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358 Idle debugger GUI to the subprocess debugger via the IdbProxy.
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359
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360 """
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361 global idb_adap_oid
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362
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363 idb_adap_oid = rpcclt.remotecall("exec", "start_the_debugger",\
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364 (gui_adap_oid,), {})
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365 idb_proxy = IdbProxy(rpcclt, pyshell, idb_adap_oid)
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366 gui = Debugger.Debugger(pyshell, idb_proxy)
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367 gui_adap = GUIAdapter(rpcclt, gui)
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368 rpcclt.register(gui_adap_oid, gui_adap)
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369 return gui
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370
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371 def close_remote_debugger(rpcclt):
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372 """Shut down subprocess debugger and Idle side of debugger RPC link
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373
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374 Request that the RPCServer shut down the subprocess debugger and link.
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375 Unregister the GUIAdapter, which will cause a GC on the Idle process
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376 debugger and RPC link objects. (The second reference to the debugger GUI
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diff changeset
377 is deleted in PyShell.close_remote_debugger().)
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378
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b8c72e86a12d Whitespace Normalization
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379 """
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380 close_subprocess_debugger(rpcclt)
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381 rpcclt.unregister(gui_adap_oid)
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382
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383 def close_subprocess_debugger(rpcclt):
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384 rpcclt.remotecall("exec", "stop_the_debugger", (idb_adap_oid,), {})
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diff changeset
385
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diff changeset
386 def restart_subprocess_debugger(rpcclt):
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387 idb_adap_oid_ret = rpcclt.remotecall("exec", "start_the_debugger",\
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diff changeset
388 (gui_adap_oid,), {})
6b67d26079f2 M PyShell.py
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diff changeset
389 assert idb_adap_oid_ret == idb_adap_oid, 'Idb restarted with different oid'