| # Type utilities. |
| # Copyright (C) 2010, 2011 Free Software Foundation, Inc. |
| |
| # 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/>. |
| |
| """Utilities for working with gdb.Types.""" |
| |
| import gdb |
| |
| |
| def get_basic_type(type_): |
| """Return the "basic" type of a type. |
| |
| Arguments: |
| type_: The type to reduce to its basic type. |
| |
| Returns: |
| type_ with const/volatile is stripped away, |
| and typedefs/references converted to the underlying type. |
| """ |
| |
| while (type_.code == gdb.TYPE_CODE_REF or |
| type_.code == gdb.TYPE_CODE_TYPEDEF): |
| if type_.code == gdb.TYPE_CODE_REF: |
| type_ = type_.target() |
| else: |
| type_ = type_.strip_typedefs() |
| return type_.unqualified() |
| |
| |
| def has_field(type_, field): |
| """Return True if a type has the specified field. |
| |
| Arguments: |
| type_: The type to examine. |
| It must be one of gdb.TYPE_CODE_STRUCT, gdb.TYPE_CODE_UNION. |
| field: The name of the field to look up. |
| |
| Returns: |
| True if the field is present either in type_ or any baseclass. |
| |
| Raises: |
| TypeError: The type is not a struct or union. |
| """ |
| |
| type_ = get_basic_type(type_) |
| if (type_.code != gdb.TYPE_CODE_STRUCT and |
| type_.code != gdb.TYPE_CODE_UNION): |
| raise TypeError("not a struct or union") |
| for f in type_.fields(): |
| if f.is_base_class: |
| if has_field(f.type, field): |
| return True |
| else: |
| # NOTE: f.name could be None |
| if f.name == field: |
| return True |
| return False |
| |
| |
| def make_enum_dict(enum_type): |
| """Return a dictionary from a program's enum type. |
| |
| Arguments: |
| enum_type: The enum to compute the dictionary for. |
| |
| Returns: |
| The dictionary of the enum. |
| |
| Raises: |
| TypeError: The type is not an enum. |
| """ |
| |
| if enum_type.code != gdb.TYPE_CODE_ENUM: |
| raise TypeError("not an enum type") |
| enum_dict = {} |
| for field in enum_type.fields(): |
| # The enum's value is stored in "bitpos". |
| enum_dict[field.name] = field.bitpos |
| return enum_dict |