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https://github.com/espressif/binutils-gdb.git
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87e3cc466e
This patch implements the DAP setVariable request. setVariable is a bit odd in that it specifies the variable to modify by passing in the variable's container and the name of the variable. This approach can't handle variable shadowing (there are a couple of open DAP bugs on this topic), so this patch renames duplicates to avoid the problem.
125 lines
4.0 KiB
Python
125 lines
4.0 KiB
Python
# Copyright 2022-2023 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import gdb
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from .frames import frame_for_id
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from .startup import send_gdb_with_response, in_gdb_thread
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from .server import request
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from .varref import BaseReference
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# Map DAP frame IDs to scopes. This ensures that scopes are re-used.
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frame_to_scope = {}
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# When the inferior is re-started, we erase all scope references. See
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# the section "Lifetime of Objects References" in the spec.
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@in_gdb_thread
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def clear_scopes(event):
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global frame_to_scope
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frame_to_scope = {}
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gdb.events.cont.connect(clear_scopes)
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class _ScopeReference(BaseReference):
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def __init__(self, name, hint, frame, var_list):
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super().__init__(name)
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self.hint = hint
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self.frame = frame
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self.inf_frame = frame.inferior_frame()
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self.func = frame.function()
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self.line = frame.line()
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# VAR_LIST might be any kind of iterator, but it's convenient
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# here if it is just a collection.
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self.var_list = tuple(var_list)
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def to_object(self):
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result = super().to_object()
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result["presentationHint"] = self.hint
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# How would we know?
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result["expensive"] = False
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result["namedVariables"] = len(self.var_list)
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if self.line is not None:
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result["line"] = self.line
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# FIXME construct a Source object
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return result
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def has_children(self):
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return True
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def child_count(self):
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return len(self.var_list)
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@in_gdb_thread
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def fetch_one_child(self, idx):
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# Make sure to select the frame first. Ideally this would not
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# be needed, but this is a way to set the current language
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# properly so that language-dependent APIs will work.
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self.inf_frame.select()
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# Here SYM will conform to the SymValueWrapper interface.
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sym = self.var_list[idx]
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name = str(sym.symbol())
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val = sym.value()
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if val is None:
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# No synthetic value, so must read the symbol value
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# ourselves.
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val = sym.symbol().value(self.inf_frame)
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elif not isinstance(val, gdb.Value):
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val = gdb.Value(val)
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return (name, val)
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class _RegisterReference(_ScopeReference):
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def __init__(self, name, frame):
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super().__init__(
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name, "registers", frame, frame.inferior_frame().architecture().registers()
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)
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@in_gdb_thread
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def fetch_one_child(self, idx):
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return (
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self.var_list[idx].name,
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self.inf_frame.read_register(self.var_list[idx]),
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)
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# Helper function to create a DAP scopes for a given frame ID.
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@in_gdb_thread
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def _get_scope(id):
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global frame_to_scope
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if id in frame_to_scope:
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scopes = frame_to_scope[id]
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else:
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frame = frame_for_id(id)
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scopes = []
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args = frame.frame_args()
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if args:
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scopes.append(_ScopeReference("Arguments", "arguments", frame, args))
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locs = frame.frame_locals()
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if locs:
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scopes.append(_ScopeReference("Locals", "locals", frame, locs))
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scopes.append(_RegisterReference("Registers", frame))
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frame_to_scope[id] = scopes
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return [x.to_object() for x in scopes]
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@request("scopes")
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def scopes(*, frameId: int, **extra):
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scopes = send_gdb_with_response(lambda: _get_scope(frameId))
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return {"scopes": scopes}
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