| 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 | import rpc
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| 25 | 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 | ##print >>sys.__stderr__, "get_stack(%r, %r)" % (fid, tbid)
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| 97 | frame = frametable[fid]
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| 98 | if tbid is None:
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| 99 | tb = None
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| 100 | else:
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| 101 | tb = tracebacktable[tbid]
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| 102 | stack, i = self.idb.get_stack(frame, tb)
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| 103 | ##print >>sys.__stderr__, "get_stack() ->", stack
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| 104 | stack = [(wrap_frame(frame), k) for frame, k in stack]
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| 105 | ##print >>sys.__stderr__, "get_stack() ->", stack
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| 106 | return stack, i
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| 107 |
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| 108 | def run(self, cmd):
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| 109 | import __main__
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| 110 | self.idb.run(cmd, __main__.__dict__)
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| 111 |
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| 112 | def set_break(self, filename, lineno):
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| 113 | msg = self.idb.set_break(filename, lineno)
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| 114 | return msg
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| 115 |
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| 116 | def clear_break(self, filename, lineno):
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| 117 | msg = self.idb.clear_break(filename, lineno)
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| 118 | return msg
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| 119 |
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| 120 | def clear_all_file_breaks(self, filename):
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| 121 | msg = self.idb.clear_all_file_breaks(filename)
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| 122 | return msg
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| 123 |
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| 124 | #----------called by a FrameProxy----------
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| 125 |
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| 126 | def frame_attr(self, fid, name):
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| 127 | frame = frametable[fid]
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| 128 | return getattr(frame, name)
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| 129 |
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| 130 | def frame_globals(self, fid):
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| 131 | frame = frametable[fid]
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| 132 | dict = frame.f_globals
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| 133 | did = id(dict)
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| 134 | dicttable[did] = dict
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| 135 | return did
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| 136 |
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| 137 | def frame_locals(self, fid):
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| 138 | frame = frametable[fid]
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| 139 | dict = frame.f_locals
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| 140 | did = id(dict)
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| 141 | dicttable[did] = dict
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| 142 | return did
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| 143 |
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| 144 | def frame_code(self, fid):
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| 145 | frame = frametable[fid]
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| 146 | code = frame.f_code
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| 147 | cid = id(code)
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| 148 | codetable[cid] = code
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| 149 | return cid
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| 150 |
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| 151 | #----------called by a CodeProxy----------
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| 152 |
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| 153 | def code_name(self, cid):
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| 154 | code = codetable[cid]
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| 155 | return code.co_name
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| 156 |
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| 157 | def code_filename(self, cid):
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| 158 | code = codetable[cid]
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| 159 | return code.co_filename
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| 160 |
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| 161 | #----------called by a DictProxy----------
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| 162 |
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| 163 | def dict_keys(self, did):
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| 164 | dict = dicttable[did]
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| 165 | return dict.keys()
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| 166 |
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| 167 | def dict_item(self, did, key):
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| 168 | dict = dicttable[did]
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| 169 | value = dict[key]
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| 170 | value = repr(value)
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| 171 | return value
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| 172 |
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| 173 | #----------end class IdbAdapter----------
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| 174 |
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| 175 |
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| 176 | def start_debugger(rpchandler, gui_adap_oid):
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| 177 | """Start the debugger and its RPC link in the Python subprocess
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| 178 |
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| 179 | Start the subprocess side of the split debugger and set up that side of the
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| 180 | RPC link by instantiating the GUIProxy, Idb debugger, and IdbAdapter
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| 181 | objects and linking them together. Register the IdbAdapter with the
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| 182 | RPCServer to handle RPC requests from the split debugger GUI via the
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| 183 | IdbProxy.
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| 184 |
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| 185 | """
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| 186 | gui_proxy = GUIProxy(rpchandler, gui_adap_oid)
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| 187 | idb = Debugger.Idb(gui_proxy)
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| 188 | idb_adap = IdbAdapter(idb)
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| 189 | rpchandler.register(idb_adap_oid, idb_adap)
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| 190 | return idb_adap_oid
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| 191 |
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| 192 |
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| 193 | #=======================================
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| 194 | #
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| 195 | # In the IDLE process:
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| 196 |
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| 197 |
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| 198 | class FrameProxy:
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| 199 |
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| 200 | def __init__(self, conn, fid):
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| 201 | self._conn = conn
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| 202 | self._fid = fid
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| 203 | self._oid = "idb_adapter"
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| 204 | self._dictcache = {}
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| 205 |
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| 206 | def __getattr__(self, name):
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| 207 | if name[:1] == "_":
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| 208 | raise AttributeError, name
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| 209 | if name == "f_code":
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| 210 | return self._get_f_code()
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| 211 | if name == "f_globals":
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| 212 | return self._get_f_globals()
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| 213 | if name == "f_locals":
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| 214 | return self._get_f_locals()
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| 215 | return self._conn.remotecall(self._oid, "frame_attr",
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| 216 | (self._fid, name), {})
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| 217 |
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| 218 | def _get_f_code(self):
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| 219 | cid = self._conn.remotecall(self._oid, "frame_code", (self._fid,), {})
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| 220 | return CodeProxy(self._conn, self._oid, cid)
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| 221 |
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| 222 | def _get_f_globals(self):
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| 223 | did = self._conn.remotecall(self._oid, "frame_globals",
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| 224 | (self._fid,), {})
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| 225 | return self._get_dict_proxy(did)
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| 226 |
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| 227 | def _get_f_locals(self):
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| 228 | did = self._conn.remotecall(self._oid, "frame_locals",
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| 229 | (self._fid,), {})
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| 230 | return self._get_dict_proxy(did)
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| 231 |
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| 232 | def _get_dict_proxy(self, did):
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| 233 | if self._dictcache.has_key(did):
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| 234 | return self._dictcache[did]
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| 235 | dp = DictProxy(self._conn, self._oid, did)
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| 236 | self._dictcache[did] = dp
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| 237 | return dp
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| 238 |
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| 239 |
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| 240 | class CodeProxy:
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| 241 |
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| 242 | def __init__(self, conn, oid, cid):
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| 243 | self._conn = conn
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| 244 | self._oid = oid
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| 245 | self._cid = cid
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| 246 |
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| 247 | def __getattr__(self, name):
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| 248 | if name == "co_name":
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| 249 | return self._conn.remotecall(self._oid, "code_name",
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| 250 | (self._cid,), {})
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| 251 | if name == "co_filename":
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| 252 | return self._conn.remotecall(self._oid, "code_filename",
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| 253 | (self._cid,), {})
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| 254 |
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| 255 |
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| 256 | class DictProxy:
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| 257 |
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| 258 | def __init__(self, conn, oid, did):
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| 259 | self._conn = conn
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| 260 | self._oid = oid
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| 261 | self._did = did
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| 262 |
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| 263 | def keys(self):
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| 264 | return self._conn.remotecall(self._oid, "dict_keys", (self._did,), {})
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| 265 |
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| 266 | def __getitem__(self, key):
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| 267 | return self._conn.remotecall(self._oid, "dict_item",
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| 268 | (self._did, key), {})
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| 269 |
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| 270 | def __getattr__(self, name):
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| 271 | ##print >>sys.__stderr__, "failed DictProxy.__getattr__:", name
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| 272 | raise AttributeError, name
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| 273 |
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| 274 |
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| 275 | class GUIAdapter:
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| 276 |
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| 277 | def __init__(self, conn, gui):
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| 278 | self.conn = conn
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| 279 | self.gui = gui
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| 280 |
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| 281 | def interaction(self, message, fid, modified_info):
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| 282 | ##print "interaction: (%s, %s, %s)" % (message, fid, modified_info)
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| 283 | frame = FrameProxy(self.conn, fid)
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| 284 | self.gui.interaction(message, frame, modified_info)
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| 285 |
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| 286 |
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| 287 | class IdbProxy:
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| 288 |
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| 289 | def __init__(self, conn, shell, oid):
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| 290 | self.oid = oid
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| 291 | self.conn = conn
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| 292 | self.shell = shell
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| 293 |
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| 294 | def call(self, methodname, *args, **kwargs):
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| 295 | ##print "**IdbProxy.call %s %s %s" % (methodname, args, kwargs)
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| 296 | value = self.conn.remotecall(self.oid, methodname, args, kwargs)
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| 297 | ##print "**IdbProxy.call %s returns %r" % (methodname, value)
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| 298 | return value
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| 299 |
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| 300 | def run(self, cmd, locals):
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| 301 | # Ignores locals on purpose!
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| 302 | seq = self.conn.asyncqueue(self.oid, "run", (cmd,), {})
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| 303 | self.shell.interp.active_seq = seq
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| 304 |
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| 305 | def get_stack(self, frame, tbid):
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| 306 | # passing frame and traceback IDs, not the objects themselves
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| 307 | stack, i = self.call("get_stack", frame._fid, tbid)
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| 308 | stack = [(FrameProxy(self.conn, fid), k) for fid, k in stack]
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| 309 | return stack, i
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| 310 |
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| 311 | def set_continue(self):
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| 312 | self.call("set_continue")
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| 313 |
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| 314 | def set_step(self):
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| 315 | self.call("set_step")
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| 316 |
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| 317 | def set_next(self, frame):
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| 318 | self.call("set_next", frame._fid)
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| 319 |
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| 320 | def set_return(self, frame):
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| 321 | self.call("set_return", frame._fid)
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| 322 |
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| 323 | def set_quit(self):
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| 324 | self.call("set_quit")
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| 325 |
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| 326 | def set_break(self, filename, lineno):
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| 327 | msg = self.call("set_break", filename, lineno)
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| 328 | return msg
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| 329 |
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| 330 | def clear_break(self, filename, lineno):
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| 331 | msg = self.call("clear_break", filename, lineno)
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| 332 | return msg
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| 333 |
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| 334 | def clear_all_file_breaks(self, filename):
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| 335 | msg = self.call("clear_all_file_breaks", filename)
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| 336 | return msg
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| 337 |
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| 338 | def start_remote_debugger(rpcclt, pyshell):
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| 339 | """Start the subprocess debugger, initialize the debugger GUI and RPC link
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| 340 |
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| 341 | Request the RPCServer start the Python subprocess debugger and link. Set
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| 342 | up the Idle side of the split debugger by instantiating the IdbProxy,
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| 343 | debugger GUI, and debugger GUIAdapter objects and linking them together.
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| 344 |
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| 345 | Register the GUIAdapter with the RPCClient to handle debugger GUI
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| 346 | interaction requests coming from the subprocess debugger via the GUIProxy.
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| 347 |
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| 348 | The IdbAdapter will pass execution and environment requests coming from the
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| 349 | Idle debugger GUI to the subprocess debugger via the IdbProxy.
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| 350 |
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| 351 | """
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| 352 | global idb_adap_oid
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| 353 |
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| 354 | idb_adap_oid = rpcclt.remotecall("exec", "start_the_debugger",\
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| 355 | (gui_adap_oid,), {})
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| 356 | idb_proxy = IdbProxy(rpcclt, pyshell, idb_adap_oid)
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| 357 | gui = Debugger.Debugger(pyshell, idb_proxy)
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| 358 | gui_adap = GUIAdapter(rpcclt, gui)
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| 359 | rpcclt.register(gui_adap_oid, gui_adap)
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| 360 | return gui
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| 361 |
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| 362 | def close_remote_debugger(rpcclt):
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| 363 | """Shut down subprocess debugger and Idle side of debugger RPC link
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| 364 |
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| 365 | Request that the RPCServer shut down the subprocess debugger and link.
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| 366 | Unregister the GUIAdapter, which will cause a GC on the Idle process
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| 367 | debugger and RPC link objects. (The second reference to the debugger GUI
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| 368 | is deleted in PyShell.close_remote_debugger().)
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| 369 |
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| 370 | """
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| 371 | close_subprocess_debugger(rpcclt)
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| 372 | rpcclt.unregister(gui_adap_oid)
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| 373 |
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| 374 | def close_subprocess_debugger(rpcclt):
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| 375 | rpcclt.remotecall("exec", "stop_the_debugger", (idb_adap_oid,), {})
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| 376 |
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| 377 | def restart_subprocess_debugger(rpcclt):
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| 378 | idb_adap_oid_ret = rpcclt.remotecall("exec", "start_the_debugger",\
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| 379 | (gui_adap_oid,), {})
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| 380 | assert idb_adap_oid_ret == idb_adap_oid, 'Idb restarted with different oid'
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