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https://github.com/espressif/binutils-gdb.git
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14e8fded85
I noticed that gdb's DAP code did not provide a way to see register values. DAP defines a "register" scope, which this patch implements. This patch also adds the missing (and optional) "presentationHint" to scopes.
115 lines
3.4 KiB
Python
115 lines
3.4 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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# Helper function to return a frame's block without error.
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@in_gdb_thread
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def _safe_block(frame):
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try:
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return frame.block()
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except gdb.error:
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return None
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# Helper function to return two lists of variables of block, up to the
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# enclosing function. The result is of the form (ARGS, LOCALS), where
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# each element is itself a list.
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@in_gdb_thread
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def _block_vars(block):
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args = []
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locs = []
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while True:
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for var in block:
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if var.is_argument:
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args.append(var)
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elif var.is_variable or var.is_constant:
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locs.append(var)
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if block.function is not None:
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break
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block = block.superblock
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return (args, locs)
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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.func = frame.function()
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self.var_list = 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.func is not None:
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result["line"] = self.func.line
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# FIXME construct a Source object
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return result
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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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sym = self.var_list[idx]
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if sym.needs_frame:
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val = sym.value(self.frame)
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else:
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val = sym.value()
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return (sym.print_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, list(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 (self.var_list[idx].name, self.frame.read_register(self.var_list[idx]))
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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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frame = frame_for_id(id)
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block = _safe_block(frame)
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scopes = []
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if block is not None:
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(args, locs) = _block_vars(block)
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if args:
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scopes.append(ScopeReference("Arguments", "arguments", frame, args))
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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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return [x.to_object() for x in scopes]
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@request("scopes")
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def scopes(*, frameId, **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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