1*6881a400Schristos /* DWARF abbrev table cache 2*6881a400Schristos 3*6881a400Schristos Copyright (C) 2022-2023 Free Software Foundation, Inc. 4*6881a400Schristos 5*6881a400Schristos This file is part of GDB. 6*6881a400Schristos 7*6881a400Schristos This program is free software; you can redistribute it and/or modify 8*6881a400Schristos it under the terms of the GNU General Public License as published by 9*6881a400Schristos the Free Software Foundation; either version 3 of the License, or 10*6881a400Schristos (at your option) any later version. 11*6881a400Schristos 12*6881a400Schristos This program is distributed in the hope that it will be useful, 13*6881a400Schristos but WITHOUT ANY WARRANTY; without even the implied warranty of 14*6881a400Schristos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15*6881a400Schristos GNU General Public License for more details. 16*6881a400Schristos 17*6881a400Schristos You should have received a copy of the GNU General Public License 18*6881a400Schristos along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19*6881a400Schristos 20*6881a400Schristos #ifndef GDB_DWARF2_ABBREV_CACHE_H 21*6881a400Schristos #define GDB_DWARF2_ABBREV_CACHE_H 22*6881a400Schristos 23*6881a400Schristos #include "dwarf2/abbrev.h" 24*6881a400Schristos #include "gdbtypes.h" 25*6881a400Schristos 26*6881a400Schristos /* An abbrev cache holds abbrev tables for easier reuse. */ 27*6881a400Schristos class abbrev_cache 28*6881a400Schristos { 29*6881a400Schristos public: 30*6881a400Schristos abbrev_cache (); 31*6881a400Schristos DISABLE_COPY_AND_ASSIGN (abbrev_cache); 32*6881a400Schristos 33*6881a400Schristos /* Find an abbrev table coming from the abbrev section SECTION at 34*6881a400Schristos offset OFFSET. Return the table, or nullptr if it has not yet 35*6881a400Schristos been registered. */ 36*6881a400Schristos abbrev_table *find (struct dwarf2_section_info *section, sect_offset offset) 37*6881a400Schristos { 38*6881a400Schristos search_key key = { section, offset }; 39*6881a400Schristos 40*6881a400Schristos return (abbrev_table *) htab_find_with_hash (m_tables.get (), &key, 41*6881a400Schristos to_underlying (offset)); 42*6881a400Schristos } 43*6881a400Schristos 44*6881a400Schristos /* Add TABLE to this cache. Ownership of TABLE is transferred to 45*6881a400Schristos the cache. Note that a table at a given section+offset may only 46*6881a400Schristos be registered once -- a violation of this will cause an assert. 47*6881a400Schristos To avoid this, call the 'find' method first, to see if the table 48*6881a400Schristos has already been read. */ 49*6881a400Schristos void add (abbrev_table_up table); 50*6881a400Schristos 51*6881a400Schristos private: 52*6881a400Schristos 53*6881a400Schristos static hashval_t hash_table (const void *item); 54*6881a400Schristos static int eq_table (const void *lhs, const void *rhs); 55*6881a400Schristos 56*6881a400Schristos struct search_key 57*6881a400Schristos { 58*6881a400Schristos struct dwarf2_section_info *section; 59*6881a400Schristos sect_offset offset; 60*6881a400Schristos }; 61*6881a400Schristos 62*6881a400Schristos /* Hash table of abbrev tables. */ 63*6881a400Schristos htab_up m_tables; 64*6881a400Schristos }; 65*6881a400Schristos 66*6881a400Schristos #endif /* GDB_DWARF2_ABBREV_CACHE_H */ 67