| 1 | /* DWARF DIEs |
| 2 | |
| 3 | Copyright (C) 2003-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef GDB_DWARF2_DIE_H |
| 21 | #define GDB_DWARF2_DIE_H |
| 22 | |
| 23 | /* This data structure holds a complete die structure. */ |
| 24 | struct die_info |
| 25 | { |
| 26 | /* Return the named attribute or NULL if not there, but do not |
| 27 | follow DW_AT_specification, etc. */ |
| 28 | struct attribute *attr (dwarf_attribute name) |
| 29 | { |
| 30 | for (unsigned i = 0; i < num_attrs; ++i) |
| 31 | if (attrs[i].name == name) |
| 32 | return &attrs[i]; |
| 33 | return NULL; |
| 34 | } |
| 35 | |
| 36 | /* Return the address base of the compile unit, which, if exists, is |
| 37 | stored either at the attribute DW_AT_GNU_addr_base, or |
| 38 | DW_AT_addr_base. */ |
| 39 | gdb::optional<ULONGEST> addr_base () |
| 40 | { |
| 41 | for (unsigned i = 0; i < num_attrs; ++i) |
| 42 | if (attrs[i].name == DW_AT_addr_base |
| 43 | || attrs[i].name == DW_AT_GNU_addr_base) |
| 44 | { |
| 45 | /* If both exist, just use the first one. */ |
| 46 | return DW_UNSND (&attrs[i]); |
| 47 | } |
| 48 | return gdb::optional<ULONGEST> (); |
| 49 | } |
| 50 | |
| 51 | /* Return range lists base of the compile unit, which, if exists, is |
| 52 | stored either at the attribute DW_AT_rnglists_base or |
| 53 | DW_AT_GNU_ranges_base. */ |
| 54 | ULONGEST ranges_base () |
| 55 | { |
| 56 | for (unsigned i = 0; i < num_attrs; ++i) |
| 57 | if (attrs[i].name == DW_AT_rnglists_base |
| 58 | || attrs[i].name == DW_AT_GNU_ranges_base) |
| 59 | { |
| 60 | /* If both exist, just use the first one. */ |
| 61 | return DW_UNSND (&attrs[i]); |
| 62 | } |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | |
| 67 | /* DWARF-2 tag for this DIE. */ |
| 68 | ENUM_BITFIELD(dwarf_tag) tag : 16; |
| 69 | |
| 70 | /* Number of attributes */ |
| 71 | unsigned char num_attrs; |
| 72 | |
| 73 | /* True if we're presently building the full type name for the |
| 74 | type derived from this DIE. */ |
| 75 | unsigned char building_fullname : 1; |
| 76 | |
| 77 | /* True if this die is in process. PR 16581. */ |
| 78 | unsigned char in_process : 1; |
| 79 | |
| 80 | /* True if this DIE has children. */ |
| 81 | unsigned char has_children : 1; |
| 82 | |
| 83 | /* Abbrev number */ |
| 84 | unsigned int abbrev; |
| 85 | |
| 86 | /* Offset in .debug_info or .debug_types section. */ |
| 87 | sect_offset sect_off; |
| 88 | |
| 89 | /* The dies in a compilation unit form an n-ary tree. PARENT |
| 90 | points to this die's parent; CHILD points to the first child of |
| 91 | this node; and all the children of a given node are chained |
| 92 | together via their SIBLING fields. */ |
| 93 | struct die_info *child; /* Its first child, if any. */ |
| 94 | struct die_info *sibling; /* Its next sibling, if any. */ |
| 95 | struct die_info *parent; /* Its parent, if any. */ |
| 96 | |
| 97 | /* An array of attributes, with NUM_ATTRS elements. There may be |
| 98 | zero, but it's not common and zero-sized arrays are not |
| 99 | sufficiently portable C. */ |
| 100 | struct attribute attrs[1]; |
| 101 | }; |
| 102 | |
| 103 | #endif /* GDB_DWARF2_DIE_H */ |