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- /* DWARF DIEs
- Copyright (C) 2003-2022 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/>. */
- #ifndef GDB_DWARF2_DIE_H
- #define GDB_DWARF2_DIE_H
- #include "complaints.h"
- /* This data structure holds a complete die structure. */
- struct die_info
- {
- /* Return the named attribute or NULL if not there, but do not
- follow DW_AT_specification, etc. */
- struct attribute *attr (dwarf_attribute name)
- {
- for (unsigned i = 0; i < num_attrs; ++i)
- if (attrs[i].name == name)
- return &attrs[i];
- return NULL;
- }
- /* Return the address base of the compile unit, which, if exists, is
- stored either at the attribute DW_AT_GNU_addr_base, or
- DW_AT_addr_base. */
- gdb::optional<ULONGEST> addr_base ()
- {
- for (unsigned i = 0; i < num_attrs; ++i)
- if (attrs[i].name == DW_AT_addr_base
- || attrs[i].name == DW_AT_GNU_addr_base)
- {
- if (attrs[i].form_is_unsigned ())
- {
- /* If both exist, just use the first one. */
- return attrs[i].as_unsigned ();
- }
- complaint (_("address base attribute (offset %s) as wrong form"),
- sect_offset_str (sect_off));
- }
- return gdb::optional<ULONGEST> ();
- }
- /* Return the base address of the compile unit into the .debug_ranges section,
- which, if exists, is stored in the DW_AT_GNU_ranges_base attribute. This
- value is only relevant in pre-DWARF 5 split-unit scenarios. */
- ULONGEST gnu_ranges_base ()
- {
- for (unsigned i = 0; i < num_attrs; ++i)
- if (attrs[i].name == DW_AT_GNU_ranges_base)
- {
- if (attrs[i].form_is_unsigned ())
- return attrs[i].as_unsigned ();
- complaint (_("ranges base attribute (offset %s) has wrong form"),
- sect_offset_str (sect_off));
- }
- return 0;
- }
- /* Return the rnglists base of the compile unit, which, if exists, is stored
- in the DW_AT_rnglists_base attribute. */
- ULONGEST rnglists_base ()
- {
- for (unsigned i = 0; i < num_attrs; ++i)
- if (attrs[i].name == DW_AT_rnglists_base)
- {
- if (attrs[i].form_is_unsigned ())
- return attrs[i].as_unsigned ();
- complaint (_("rnglists base attribute (offset %s) has wrong form"),
- sect_offset_str (sect_off));
- }
- return 0;
- }
- /* DWARF-2 tag for this DIE. */
- ENUM_BITFIELD(dwarf_tag) tag : 16;
- /* Number of attributes */
- unsigned char num_attrs;
- /* True if we're presently building the full type name for the
- type derived from this DIE. */
- unsigned char building_fullname : 1;
- /* True if this die is in process. PR 16581. */
- unsigned char in_process : 1;
- /* True if this DIE has children. */
- unsigned char has_children : 1;
- /* Abbrev number */
- unsigned int abbrev;
- /* Offset in .debug_info or .debug_types section. */
- sect_offset sect_off;
- /* The dies in a compilation unit form an n-ary tree. PARENT
- points to this die's parent; CHILD points to the first child of
- this node; and all the children of a given node are chained
- together via their SIBLING fields. */
- struct die_info *child; /* Its first child, if any. */
- struct die_info *sibling; /* Its next sibling, if any. */
- struct die_info *parent; /* Its parent, if any. */
- /* An array of attributes, with NUM_ATTRS elements. There may be
- zero, but it's not common and zero-sized arrays are not
- sufficiently portable C. */
- struct attribute attrs[1];
- };
- #endif /* GDB_DWARF2_DIE_H */
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