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/* DWARF 2 abbrev table cache
Copyright (C) 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/>. */
#include "defs.h"
#include "dwarf2/read.h"
#include "dwarf2/abbrev-cache.h"
/* Hash function for an abbrev table. */
hashval_t
abbrev_cache::hash_table (const void *item)
{
const struct abbrev_table *table = (const struct abbrev_table *) item;
return to_underlying (table->sect_off);
}
/* Comparison function for abbrev table. */
int
abbrev_cache::eq_table (const void *lhs, const void *rhs)
{
const struct abbrev_table *l_table = (const struct abbrev_table *) lhs;
const search_key *key = (const search_key *) rhs;
return (l_table->section == key->section
&& l_table->sect_off == key->offset);
}
abbrev_cache::abbrev_cache ()
: m_tables (htab_create_alloc (20, hash_table, eq_table,
htab_delete_entry<abbrev_table>,
xcalloc, xfree))
{
}
void
abbrev_cache::add (abbrev_table_up table)
{
/* We allow this as a convenience to the caller. */
if (table == nullptr)
return;
search_key key = { table->section, table->sect_off };
void **slot = htab_find_slot_with_hash (m_tables.get (), &key,
to_underlying (table->sect_off),
INSERT);
/* If this one already existed, then it should have been reused. */
gdb_assert (*slot == nullptr);
*slot = (void *) table.release ();
}
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