| 1 | /* DWARF abbrev table |
| 2 | |
| 3 | Copyright (C) 1994-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, |
| 6 | Inc. with support from Florida State University (under contract |
| 7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. |
| 8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., |
| 9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 |
| 10 | support. |
| 11 | |
| 12 | This file is part of GDB. |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or modify |
| 15 | it under the terms of the GNU General Public License as published by |
| 16 | the Free Software Foundation; either version 3 of the License, or |
| 17 | (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, |
| 20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | GNU General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 26 | |
| 27 | #ifndef GDB_DWARF2_ABBREV_H |
| 28 | #define GDB_DWARF2_ABBREV_H |
| 29 | |
| 30 | #include "hashtab.h" |
| 31 | |
| 32 | /* This data structure holds the information of an abbrev. */ |
| 33 | struct abbrev_info |
| 34 | { |
| 35 | unsigned int number; /* number identifying abbrev */ |
| 36 | enum dwarf_tag tag; /* dwarf tag */ |
| 37 | unsigned short has_children; /* boolean */ |
| 38 | unsigned short num_attrs; /* number of attributes */ |
| 39 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
| 40 | }; |
| 41 | |
| 42 | struct attr_abbrev |
| 43 | { |
| 44 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
| 45 | ENUM_BITFIELD(dwarf_form) form : 16; |
| 46 | |
| 47 | /* It is valid only if FORM is DW_FORM_implicit_const. */ |
| 48 | LONGEST implicit_const; |
| 49 | }; |
| 50 | |
| 51 | struct abbrev_table; |
| 52 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; |
| 53 | |
| 54 | /* Top level data structure to contain an abbreviation table. */ |
| 55 | |
| 56 | struct abbrev_table |
| 57 | { |
| 58 | static abbrev_table_up read (struct objfile *objfile, |
| 59 | struct dwarf2_section_info *section, |
| 60 | sect_offset sect_off); |
| 61 | |
| 62 | /* Look up an abbrev in the table. |
| 63 | Returns NULL if the abbrev is not found. */ |
| 64 | |
| 65 | struct abbrev_info *lookup_abbrev (unsigned int abbrev_number) |
| 66 | { |
| 67 | struct abbrev_info search; |
| 68 | search.number = abbrev_number; |
| 69 | |
| 70 | return (struct abbrev_info *) htab_find_with_hash (m_abbrevs.get (), |
| 71 | &search, |
| 72 | abbrev_number); |
| 73 | } |
| 74 | |
| 75 | /* Where the abbrev table came from. |
| 76 | This is used as a sanity check when the table is used. */ |
| 77 | const sect_offset sect_off; |
| 78 | |
| 79 | private: |
| 80 | |
| 81 | explicit abbrev_table (sect_offset off); |
| 82 | |
| 83 | DISABLE_COPY_AND_ASSIGN (abbrev_table); |
| 84 | |
| 85 | /* Allocate space for a struct abbrev_info object in |
| 86 | ABBREV_TABLE. */ |
| 87 | struct abbrev_info *alloc_abbrev (); |
| 88 | |
| 89 | /* Add an abbreviation to the table. */ |
| 90 | void add_abbrev (struct abbrev_info *abbrev); |
| 91 | |
| 92 | /* Hash table of abbrevs. */ |
| 93 | htab_up m_abbrevs; |
| 94 | |
| 95 | /* Storage for the abbrev table. */ |
| 96 | auto_obstack m_abbrev_obstack; |
| 97 | }; |
| 98 | |
| 99 | #endif /* GDB_DWARF2_ABBREV_H */ |