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c2d50fd0 TT |
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 | { | |
052c8bb8 TT |
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 | ||
a39fdb41 TT |
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 | { | |
eeb64781 TT |
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> (); | |
a39fdb41 TT |
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 | { | |
eeb64781 TT |
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; | |
a39fdb41 TT |
64 | } |
65 | ||
052c8bb8 | 66 | |
c2d50fd0 TT |
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 */ |