Mercurial > cpython-lru_cache-weakref

annotate Lib/idlelib/RemoteDebugger.py @ 27998:e27f58a50737 legacy-trunk

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SF bug #690377: Dud footnote reference in distutils docs
author Raymond Hettinger <python@rcn.com>
date Fri, 21 Feb 2003 02:47:09 +0000
parents a457531c0fd4
children ad84fe58ec2f
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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 sys
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24 import types
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25 import rpc
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26 import Debugger
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27
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28 debugging = 0
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29
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30 idb_adap_oid = "idb_adapter"
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31 gui_adap_oid = "gui_adapter"
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32
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33 #=======================================
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34 #
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35 # In the PYTHON subprocess:
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36
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37 frametable = {}
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38 dicttable = {}
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39 codetable = {}
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40 tracebacktable = {}
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41
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42 def wrap_frame(frame):
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43 fid = id(frame)
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44 frametable[fid] = frame
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45 return fid
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46
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47 def wrap_info(info):
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48 "replace info[2], a traceback instance, by its ID"
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49 if info is None:
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50 return None
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51 else:
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52 traceback = info[2]
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53 assert isinstance(traceback, types.TracebackType)
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54 traceback_id = id(traceback)
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55 tracebacktable[traceback_id] = traceback
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56 modified_info = (info[0], info[1], traceback_id)
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57 return modified_info
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58
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59 class GUIProxy:
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60
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61 def __init__(self, conn, gui_adap_oid):
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62 self.conn = conn
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63 self.oid = gui_adap_oid
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64
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65 def interaction(self, message, frame, info=None):
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66 # calls rpc.SocketIO.remotecall() via run.MyHandler instance
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67 # pass frame and traceback object IDs instead of the objects themselves
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68 self.conn.remotecall(self.oid, "interaction",
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69 (message, wrap_frame(frame), wrap_info(info)),
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70 {})
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71
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72 class IdbAdapter:
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73
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74 def __init__(self, idb):
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75 self.idb = idb
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76
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77 #----------called by an IdbProxy----------
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78
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79 def set_step(self):
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80 self.idb.set_step()
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81
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82 def set_quit(self):
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83 self.idb.set_quit()
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84
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85 def set_continue(self):
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86 self.idb.set_continue()
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87
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88 def set_next(self, fid):
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89 frame = frametable[fid]
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90 self.idb.set_next(frame)
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91
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92 def set_return(self, fid):
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93 frame = frametable[fid]
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94 self.idb.set_return(frame)
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95
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96 def get_stack(self, fid, tbid):
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97 ##print >>sys.__stderr__, "get_stack(%s, %s)" % (`fid`, `tbid`)
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98 frame = frametable[fid]
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99 if tbid is None:
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100 tb = None
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101 else:
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102 tb = tracebacktable[tbid]
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103 stack, i = self.idb.get_stack(frame, tb)
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104 ##print >>sys.__stderr__, "get_stack() ->", stack
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105 stack = [(wrap_frame(frame), k) for frame, k in stack]
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106 ##print >>sys.__stderr__, "get_stack() ->", stack
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107 return stack, i
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108
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109 def run(self, cmd):
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110 import __main__
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111 self.idb.run(cmd, __main__.__dict__)
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112
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113 def set_break(self, filename, lineno):
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114 msg = self.idb.set_break(filename, lineno)
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115 return msg
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116
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117 def clear_break(self, filename, lineno):
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118 msg = self.idb.clear_break(filename, lineno)
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119 return msg
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120
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121 def clear_all_file_breaks(self, filename):
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122 msg = self.idb.clear_all_file_breaks(filename)
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123 return msg
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124
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125 #----------called by a FrameProxy----------
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126
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127 def frame_attr(self, fid, name):
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128 frame = frametable[fid]
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129 return getattr(frame, name)
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130
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131 def frame_globals(self, fid):
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132 frame = frametable[fid]
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133 dict = frame.f_globals
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134 did = id(dict)
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135 dicttable[did] = dict
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136 return did
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137
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138 def frame_locals(self, fid):
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139 frame = frametable[fid]
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140 dict = frame.f_locals
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141 did = id(dict)
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142 dicttable[did] = dict
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143 return did
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144
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145 def frame_code(self, fid):
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146 frame = frametable[fid]
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147 code = frame.f_code
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148 cid = id(code)
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149 codetable[cid] = code
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150 return cid
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151
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152 #----------called by a CodeProxy----------
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153
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154 def code_name(self, cid):
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155 code = codetable[cid]
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156 return code.co_name
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157
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158 def code_filename(self, cid):
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159 code = codetable[cid]
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160 return code.co_filename
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161
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162 #----------called by a DictProxy----------
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163
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164 def dict_keys(self, did):
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165 dict = dicttable[did]
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166 return dict.keys()
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167
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168 def dict_item(self, did, key):
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169 dict = dicttable[did]
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170 value = dict[key]
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171 value = repr(value)
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172 return value
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173
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174 #----------end class IdbAdapter----------
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175
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176
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177 def start_debugger(rpchandler, gui_adap_oid):
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178 """Start the debugger and its RPC link in the Python subprocess
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179
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180 Start the subprocess side of the split debugger and set up that side of the
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181 RPC link by instantiating the GUIProxy, Idb debugger, and IdbAdapter
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182 objects and linking them together. Register the IdbAdapter with the
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183 RPCServer to handle RPC requests from the split debugger GUI via the
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184 IdbProxy.
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185
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186 """
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187 gui_proxy = GUIProxy(rpchandler, gui_adap_oid)
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188 idb = Debugger.Idb(gui_proxy)
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189 idb_adap = IdbAdapter(idb)
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190 rpchandler.register(idb_adap_oid, idb_adap)
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191 return idb_adap_oid
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192
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193
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194 #=======================================
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195 #
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196 # In the IDLE process:
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197
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198
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199 class FrameProxy:
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200
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201 def __init__(self, conn, fid):
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202 self._conn = conn
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203 self._fid = fid
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204 self._oid = "idb_adapter"
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205 self._dictcache = {}
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206
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207 def __getattr__(self, name):
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208 if name[:1] == "_":
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209 raise AttributeError, name
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210 if name == "f_code":
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211 return self._get_f_code()
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212 if name == "f_globals":
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213 return self._get_f_globals()
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214 if name == "f_locals":
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215 return self._get_f_locals()
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216 return self._conn.remotecall(self._oid, "frame_attr",
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217 (self._fid, name), {})
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218
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219 def _get_f_code(self):
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220 cid = self._conn.remotecall(self._oid, "frame_code", (self._fid,), {})
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221 return CodeProxy(self._conn, self._oid, cid)
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222
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223 def _get_f_globals(self):
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224 did = self._conn.remotecall(self._oid, "frame_globals",
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225 (self._fid,), {})
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226 return self._get_dict_proxy(did)
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227
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228 def _get_f_locals(self):
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229 did = self._conn.remotecall(self._oid, "frame_locals",
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230 (self._fid,), {})
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231 return self._get_dict_proxy(did)
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232
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233 def _get_dict_proxy(self, did):
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234 if self._dictcache.has_key(did):
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235 return self._dictcache[did]
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236 dp = DictProxy(self._conn, self._oid, did)
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237 self._dictcache[did] = dp
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238 return dp
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239
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240
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241 class CodeProxy:
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242
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243 def __init__(self, conn, oid, cid):
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244 self._conn = conn
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245 self._oid = oid
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246 self._cid = cid
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247
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248 def __getattr__(self, name):
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249 if name == "co_name":
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250 return self._conn.remotecall(self._oid, "code_name",
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251 (self._cid,), {})
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252 if name == "co_filename":
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253 return self._conn.remotecall(self._oid, "code_filename",
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254 (self._cid,), {})
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diff changeset
255
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256
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257 class DictProxy:
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258
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259 def __init__(self, conn, oid, did):
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260 self._conn = conn
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261 self._oid = oid
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262 self._did = did
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263
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264 def keys(self):
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265 return self._conn.remotecall(self._oid, "dict_keys", (self._did,), {})
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266
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267 def __getitem__(self, key):
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268 return self._conn.remotecall(self._oid, "dict_item",
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diff changeset
269 (self._did, key), {})
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270
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271 def __getattr__(self, name):
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272 ##print >>sys.__stderr__, "failed DictProxy.__getattr__:", name
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273 raise AttributeError, name
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274
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275
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276 class GUIAdapter:
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277
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278 def __init__(self, conn, gui):
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279 self.conn = conn
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280 self.gui = gui
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diff changeset
281
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282 def interaction(self, message, fid, modified_info):
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283 ##print "interaction: (%s, %s, %s)" % (message, fid, modified_info)
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284 frame = FrameProxy(self.conn, fid)
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285 self.gui.interaction(message, frame, modified_info)
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286
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287
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288 class IdbProxy:
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289
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290 def __init__(self, conn, shell, oid):
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diff changeset
291 self.oid = oid
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292 self.conn = conn
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293 self.shell = shell
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294
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295 def call(self, methodname, *args, **kwargs):
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296 ##print "**IdbProxy.call %s %s %s" % (methodname, args, kwargs)
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297 value = self.conn.remotecall(self.oid, methodname, args, kwargs)
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298 ##print "**IdbProxy.call %s returns %s" % (methodname, `value`)
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299 return value
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300
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301 def run(self, cmd, locals):
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302 # Ignores locals on purpose!
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303 seq = self.conn.asynccall(self.oid, "run", (cmd,), {})
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304 self.shell.interp.active_seq = seq
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305
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306 def get_stack(self, frame, tbid):
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307 # passing frame and traceback IDs, not the objects themselves
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308 stack, i = self.call("get_stack", frame._fid, tbid)
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309 stack = [(FrameProxy(self.conn, fid), k) for fid, k in stack]
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310 return stack, i
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311
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312 def set_continue(self):
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313 self.call("set_continue")
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314
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315 def set_step(self):
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316 self.call("set_step")
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317
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318 def set_next(self, frame):
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319 self.call("set_next", frame._fid)
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320
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321 def set_return(self, frame):
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322 self.call("set_return", frame._fid)
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323
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324 def set_quit(self):
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325 self.call("set_quit")
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326
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327 def set_break(self, filename, lineno):
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328 msg = self.call("set_break", filename, lineno)
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329 return msg
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330
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331 def clear_break(self, filename, lineno):
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332 msg = self.call("clear_break", filename, lineno)
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333 return msg
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334
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335 def clear_all_file_breaks(self, filename):
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336 msg = self.call("clear_all_file_breaks", filename)
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337 return msg
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338
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339 def start_remote_debugger(rpcclt, pyshell):
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340 """Start the subprocess debugger, initialize the debugger GUI and RPC link
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341
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342 Request the RPCServer start the Python subprocess debugger and link. Set
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343 up the Idle side of the split debugger by instantiating the IdbProxy,
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344 debugger GUI, and debugger GUIAdapter objects and linking them together.
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345
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346 Register the GUIAdapter with the RPCClient to handle debugger GUI
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347 interaction requests coming from the subprocess debugger via the GUIProxy.
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348
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349 The IdbAdapter will pass execution and environment requests coming from the
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350 Idle debugger GUI to the subprocess debugger via the IdbProxy.
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351
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352 """
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353 global idb_adap_oid
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354
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355 idb_adap_oid = rpcclt.remotecall("exec", "start_the_debugger",\
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356 (gui_adap_oid,), {})
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357 idb_proxy = IdbProxy(rpcclt, pyshell, idb_adap_oid)
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358 gui = Debugger.Debugger(pyshell, idb_proxy)
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359 gui_adap = GUIAdapter(rpcclt, gui)
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360 rpcclt.register(gui_adap_oid, gui_adap)
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361 return gui
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362
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363 def close_remote_debugger(rpcclt):
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364 """Shut down subprocess debugger and Idle side of debugger RPC link
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365
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366 Request that the RPCServer shut down the subprocess debugger and link.
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367 Unregister the GUIAdapter, which will cause a GC on the Idle process
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368 debugger and RPC link objects. (The second reference to the debugger GUI
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diff changeset
369 is deleted in PyShell.close_remote_debugger().)
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370
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b8c72e86a12d Whitespace Normalization
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diff changeset
371 """
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372 close_subprocess_debugger(rpcclt)
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373 rpcclt.unregister(gui_adap_oid)
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374
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375 def close_subprocess_debugger(rpcclt):
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376 rpcclt.remotecall("exec", "stop_the_debugger", (idb_adap_oid,), {})
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diff changeset
377
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378 def restart_subprocess_debugger(rpcclt):
6b67d26079f2 M PyShell.py
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diff changeset
379 idb_adap_oid_ret = rpcclt.remotecall("exec", "start_the_debugger",\
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diff changeset
380 (gui_adap_oid,), {})
6b67d26079f2 M PyShell.py
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diff changeset
381 assert idb_adap_oid_ret == idb_adap_oid, 'Idb restarted with different oid'