382 lines
11 KiB
Python
382 lines
11 KiB
Python
"""Support for remote Python debugging.
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Some ASCII art to describe the structure:
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IN PYTHON SUBPROCESS # IN IDLE PROCESS
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#
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# oid='gui_adapter'
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+----------+ # +------------+ +-----+
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| GUIProxy |--remote#call-->| GUIAdapter |--calls-->| GUI |
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+-----+--calls-->+----------+ # +------------+ +-----+
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| Idb | # /
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+-----+<-calls--+------------+ # +----------+<--calls-/
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| IdbAdapter |<--remote#call--| IdbProxy |
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+------------+ # +----------+
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oid='idb_adapter' #
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The purpose of the Proxy and Adapter classes is to translate certain
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arguments and return values that cannot be transported through the RPC
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barrier, in particular frame and traceback objects.
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"""
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import sys
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import types
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from idlelib import rpc
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from idlelib import Debugger
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debugging = 0
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idb_adap_oid = "idb_adapter"
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gui_adap_oid = "gui_adapter"
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#=======================================
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#
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# In the PYTHON subprocess:
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frametable = {}
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dicttable = {}
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codetable = {}
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tracebacktable = {}
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def wrap_frame(frame):
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fid = id(frame)
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frametable[fid] = frame
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return fid
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def wrap_info(info):
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"replace info[2], a traceback instance, by its ID"
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if info is None:
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return None
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else:
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traceback = info[2]
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assert isinstance(traceback, types.TracebackType)
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traceback_id = id(traceback)
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tracebacktable[traceback_id] = traceback
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modified_info = (info[0], info[1], traceback_id)
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return modified_info
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class GUIProxy:
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def __init__(self, conn, gui_adap_oid):
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self.conn = conn
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self.oid = gui_adap_oid
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def interaction(self, message, frame, info=None):
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# calls rpc.SocketIO.remotecall() via run.MyHandler instance
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# pass frame and traceback object IDs instead of the objects themselves
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self.conn.remotecall(self.oid, "interaction",
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(message, wrap_frame(frame), wrap_info(info)),
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{})
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class IdbAdapter:
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def __init__(self, idb):
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self.idb = idb
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#----------called by an IdbProxy----------
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def set_step(self):
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self.idb.set_step()
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def set_quit(self):
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self.idb.set_quit()
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def set_continue(self):
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self.idb.set_continue()
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def set_next(self, fid):
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frame = frametable[fid]
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self.idb.set_next(frame)
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def set_return(self, fid):
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frame = frametable[fid]
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self.idb.set_return(frame)
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def get_stack(self, fid, tbid):
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##print >>sys.__stderr__, "get_stack(%r, %r)" % (fid, tbid)
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frame = frametable[fid]
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if tbid is None:
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tb = None
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else:
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tb = tracebacktable[tbid]
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stack, i = self.idb.get_stack(frame, tb)
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##print >>sys.__stderr__, "get_stack() ->", stack
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stack = [(wrap_frame(frame), k) for frame, k in stack]
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##print >>sys.__stderr__, "get_stack() ->", stack
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return stack, i
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def run(self, cmd):
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import __main__
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self.idb.run(cmd, __main__.__dict__)
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def set_break(self, filename, lineno):
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msg = self.idb.set_break(filename, lineno)
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return msg
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def clear_break(self, filename, lineno):
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msg = self.idb.clear_break(filename, lineno)
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return msg
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def clear_all_file_breaks(self, filename):
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msg = self.idb.clear_all_file_breaks(filename)
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return msg
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#----------called by a FrameProxy----------
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def frame_attr(self, fid, name):
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frame = frametable[fid]
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return getattr(frame, name)
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def frame_globals(self, fid):
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frame = frametable[fid]
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dict = frame.f_globals
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did = id(dict)
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dicttable[did] = dict
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return did
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def frame_locals(self, fid):
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frame = frametable[fid]
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dict = frame.f_locals
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did = id(dict)
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dicttable[did] = dict
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return did
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def frame_code(self, fid):
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frame = frametable[fid]
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code = frame.f_code
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cid = id(code)
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codetable[cid] = code
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return cid
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#----------called by a CodeProxy----------
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def code_name(self, cid):
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code = codetable[cid]
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return code.co_name
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def code_filename(self, cid):
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code = codetable[cid]
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return code.co_filename
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#----------called by a DictProxy----------
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def dict_keys(self, did):
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dict = dicttable[did]
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return list(dict.keys())
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def dict_item(self, did, key):
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dict = dicttable[did]
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value = dict[key]
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value = repr(value)
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return value
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#----------end class IdbAdapter----------
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def start_debugger(rpchandler, gui_adap_oid):
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"""Start the debugger and its RPC link in the Python subprocess
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Start the subprocess side of the split debugger and set up that side of the
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RPC link by instantiating the GUIProxy, Idb debugger, and IdbAdapter
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objects and linking them together. Register the IdbAdapter with the
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RPCServer to handle RPC requests from the split debugger GUI via the
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IdbProxy.
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"""
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gui_proxy = GUIProxy(rpchandler, gui_adap_oid)
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idb = Debugger.Idb(gui_proxy)
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idb_adap = IdbAdapter(idb)
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rpchandler.register(idb_adap_oid, idb_adap)
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return idb_adap_oid
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#=======================================
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#
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# In the IDLE process:
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class FrameProxy:
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def __init__(self, conn, fid):
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self._conn = conn
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self._fid = fid
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self._oid = "idb_adapter"
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self._dictcache = {}
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def __getattr__(self, name):
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if name[:1] == "_":
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raise AttributeError(name)
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if name == "f_code":
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return self._get_f_code()
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if name == "f_globals":
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return self._get_f_globals()
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if name == "f_locals":
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return self._get_f_locals()
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return self._conn.remotecall(self._oid, "frame_attr",
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(self._fid, name), {})
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def _get_f_code(self):
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cid = self._conn.remotecall(self._oid, "frame_code", (self._fid,), {})
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return CodeProxy(self._conn, self._oid, cid)
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def _get_f_globals(self):
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did = self._conn.remotecall(self._oid, "frame_globals",
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(self._fid,), {})
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return self._get_dict_proxy(did)
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def _get_f_locals(self):
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did = self._conn.remotecall(self._oid, "frame_locals",
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(self._fid,), {})
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return self._get_dict_proxy(did)
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def _get_dict_proxy(self, did):
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if did in self._dictcache:
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return self._dictcache[did]
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dp = DictProxy(self._conn, self._oid, did)
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self._dictcache[did] = dp
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return dp
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class CodeProxy:
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def __init__(self, conn, oid, cid):
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self._conn = conn
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self._oid = oid
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self._cid = cid
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def __getattr__(self, name):
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if name == "co_name":
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return self._conn.remotecall(self._oid, "code_name",
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(self._cid,), {})
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if name == "co_filename":
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return self._conn.remotecall(self._oid, "code_filename",
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(self._cid,), {})
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class DictProxy:
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def __init__(self, conn, oid, did):
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self._conn = conn
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self._oid = oid
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self._did = did
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def keys(self):
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return self._conn.remotecall(self._oid, "dict_keys", (self._did,), {})
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def __getitem__(self, key):
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return self._conn.remotecall(self._oid, "dict_item",
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(self._did, key), {})
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def __getattr__(self, name):
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##print >>sys.__stderr__, "failed DictProxy.__getattr__:", name
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raise AttributeError(name)
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class GUIAdapter:
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def __init__(self, conn, gui):
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self.conn = conn
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self.gui = gui
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def interaction(self, message, fid, modified_info):
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##print "interaction: (%s, %s, %s)" % (message, fid, modified_info)
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frame = FrameProxy(self.conn, fid)
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self.gui.interaction(message, frame, modified_info)
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class IdbProxy:
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def __init__(self, conn, shell, oid):
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self.oid = oid
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self.conn = conn
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self.shell = shell
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def call(self, methodname, *args, **kwargs):
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##print "**IdbProxy.call %s %s %s" % (methodname, args, kwargs)
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value = self.conn.remotecall(self.oid, methodname, args, kwargs)
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##print "**IdbProxy.call %s returns %r" % (methodname, value)
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return value
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def run(self, cmd, locals):
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# Ignores locals on purpose!
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seq = self.conn.asyncqueue(self.oid, "run", (cmd,), {})
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self.shell.interp.active_seq = seq
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def get_stack(self, frame, tbid):
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# passing frame and traceback IDs, not the objects themselves
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stack, i = self.call("get_stack", frame._fid, tbid)
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stack = [(FrameProxy(self.conn, fid), k) for fid, k in stack]
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return stack, i
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def set_continue(self):
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self.call("set_continue")
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def set_step(self):
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self.call("set_step")
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def set_next(self, frame):
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self.call("set_next", frame._fid)
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def set_return(self, frame):
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self.call("set_return", frame._fid)
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def set_quit(self):
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self.call("set_quit")
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def set_break(self, filename, lineno):
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msg = self.call("set_break", filename, lineno)
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return msg
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def clear_break(self, filename, lineno):
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msg = self.call("clear_break", filename, lineno)
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return msg
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def clear_all_file_breaks(self, filename):
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msg = self.call("clear_all_file_breaks", filename)
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return msg
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def start_remote_debugger(rpcclt, pyshell):
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"""Start the subprocess debugger, initialize the debugger GUI and RPC link
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Request the RPCServer start the Python subprocess debugger and link. Set
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up the Idle side of the split debugger by instantiating the IdbProxy,
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debugger GUI, and debugger GUIAdapter objects and linking them together.
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Register the GUIAdapter with the RPCClient to handle debugger GUI
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interaction requests coming from the subprocess debugger via the GUIProxy.
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The IdbAdapter will pass execution and environment requests coming from the
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Idle debugger GUI to the subprocess debugger via the IdbProxy.
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"""
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global idb_adap_oid
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idb_adap_oid = rpcclt.remotecall("exec", "start_the_debugger",\
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(gui_adap_oid,), {})
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idb_proxy = IdbProxy(rpcclt, pyshell, idb_adap_oid)
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gui = Debugger.Debugger(pyshell, idb_proxy)
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gui_adap = GUIAdapter(rpcclt, gui)
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rpcclt.register(gui_adap_oid, gui_adap)
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return gui
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def close_remote_debugger(rpcclt):
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"""Shut down subprocess debugger and Idle side of debugger RPC link
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Request that the RPCServer shut down the subprocess debugger and link.
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Unregister the GUIAdapter, which will cause a GC on the Idle process
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debugger and RPC link objects. (The second reference to the debugger GUI
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is deleted in PyShell.close_remote_debugger().)
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"""
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close_subprocess_debugger(rpcclt)
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rpcclt.unregister(gui_adap_oid)
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def close_subprocess_debugger(rpcclt):
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rpcclt.remotecall("exec", "stop_the_debugger", (idb_adap_oid,), {})
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def restart_subprocess_debugger(rpcclt):
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idb_adap_oid_ret = rpcclt.remotecall("exec", "start_the_debugger",\
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(gui_adap_oid,), {})
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assert idb_adap_oid_ret == idb_adap_oid, 'Idb restarted with different oid'
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