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# Architecture commands for GDB, the GNU debugger.
#
# Copyright (C) 1998-2023 Free Software Foundation, Inc.
#
# This file is part of GDB.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from typing import List, Optional, Tuple, Union
def join_type_and_name(t: str, n: str):
"Combine the type T and the name N into a C declaration."
if t.endswith("*") or t.endswith("&"):
return t + n
else:
return t + " " + n
def join_params(params: List[Tuple[str, str]]):
"""Given a sequence of (TYPE, NAME) pairs, generate a comma-separated
list of declarations."""
return ", ".join([join_type_and_name(p[0], p[1]) for p in params])
class Component:
"Base class for all components."
def __init__(
self,
name: str,
type: str,
printer: Optional[str] = None,
comment: Optional[str] = None,
predicate: bool = False,
predefault: Optional[str] = None,
postdefault: Optional[str] = None,
invalid: Union[bool, str] = True,
params: Optional[List[Tuple[str, str]]] = None,
param_checks: Optional[List[str]] = None,
result_checks: Optional[List[str]] = None,
implement: bool = True,
):
self.name = name
self.type = type
self.printer = printer
self.comment = comment
self.predicate = predicate
self.predefault = predefault
self.postdefault = postdefault
self.invalid = invalid
self.params = params or []
self.param_checks = param_checks
self.result_checks = result_checks
self.implement = implement
components.append(self)
# It doesn't make sense to have a check of the result value
# for a function or method with void return type.
if self.type == "void" and self.result_checks:
raise Exception("can't have result checks with a void return type")
def get_predicate(self):
"Return the expression used for validity checking."
if self.predefault:
predicate = f"gdbarch->{self.name} != {self.predefault}"
else:
predicate = f"gdbarch->{self.name} != NULL"
return predicate
class Info(Component):
"An Info component is copied from the gdbarch_info."
class Value(Component):
"A Value component is just a data member."
def __init__(
self,
*,
name: str,
type: str,
comment: Optional[str] = None,
predicate: bool = False,
predefault: Optional[str] = None,
postdefault: Optional[str] = None,
invalid: Union[bool, str] = True,
printer: Optional[str] = None,
):
super().__init__(
comment=comment,
name=name,
type=type,
predicate=predicate,
predefault=predefault,
postdefault=postdefault,
invalid=invalid,
printer=printer,
)
class Function(Component):
"A Function component is a function pointer member."
def __init__(
self,
*,
name: str,
type: str,
params: List[Tuple[str, str]],
comment: Optional[str] = None,
predicate: bool = False,
predefault: Optional[str] = None,
postdefault: Optional[str] = None,
invalid: Union[bool, str] = True,
printer: Optional[str] = None,
param_checks: Optional[List[str]] = None,
result_checks: Optional[List[str]] = None,
implement: bool = True,
):
super().__init__(
comment=comment,
name=name,
type=type,
predicate=predicate,
predefault=predefault,
postdefault=postdefault,
invalid=invalid,
printer=printer,
params=params,
param_checks=param_checks,
result_checks=result_checks,
implement=implement,
)
def ftype(self):
"Return the name of the function typedef to use."
return f"gdbarch_{self.name}_ftype"
def param_list(self):
"Return the formal parameter list as a string."
return join_params(self.params)
def set_list(self):
"""Return the formal parameter list of the caller function,
as a string. This list includes the gdbarch."""
arch_arg = ("struct gdbarch *", "gdbarch")
arch_tuple = [arch_arg]
return join_params(arch_tuple + list(self.params))
def actuals(self):
"Return the actual parameters to forward, as a string."
return ", ".join([p[1] for p in self.params])
class Method(Function):
"A Method is like a Function but passes the gdbarch through."
def param_list(self):
"See superclass."
return self.set_list()
def actuals(self):
"See superclass."
result = ["gdbarch"] + [p[1] for p in self.params]
return ", ".join(result)
# All the components created in gdbarch-components.py.
components: List[Component] = []
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