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/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "classfile/resolutionErrors.hpp"
#include "memory/resourceArea.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/safepoint.hpp"
#include "utilities/hashtable.inline.hpp"
// add new entry to the table
void ResolutionErrorTable::add_entry(int index, unsigned int hash,
constantPoolHandle pool, int cp_index, Symbol* error)
{
assert_locked_or_safepoint(SystemDictionary_lock);
assert(!pool.is_null() && error != NULL, "adding NULL obj");
ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error);
add_entry(index, entry);
}
// find entry in the table
ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash,
constantPoolHandle pool, int cp_index)
{
assert_locked_or_safepoint(SystemDictionary_lock);
for (ResolutionErrorEntry *error_probe = bucket(index);
error_probe != NULL;
error_probe = error_probe->next()) {
if (error_probe->hash() == hash && error_probe->pool() == pool()) {
return error_probe;;
}
}
return NULL;
}
void ResolutionErrorEntry::set_error(Symbol* e) {
assert(e == NULL || _error == NULL, "cannot reset error");
_error = e;
if (_error != NULL) _error->increment_refcount();
}
// create new error entry
ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, constantPoolOop pool,
int cp_index, Symbol* error)
{
ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable<constantPoolOop>::new_entry(hash, pool);
entry->set_cp_index(cp_index);
NOT_PRODUCT(entry->set_error(NULL);)
entry->set_error(error);
return entry;
}
void ResolutionErrorTable::free_entry(ResolutionErrorEntry *entry) {
// decrement error refcount
assert(entry->error() != NULL, "error should be set");
entry->error()->decrement_refcount();
Hashtable<constantPoolOop>::free_entry(entry);
}
// create resolution error table
ResolutionErrorTable::ResolutionErrorTable(int table_size)
: Hashtable<constantPoolOop>(table_size, sizeof(ResolutionErrorEntry)) {
}
// GC support
void ResolutionErrorTable::oops_do(OopClosure* f) {
for (int i = 0; i < table_size(); i++) {
for (ResolutionErrorEntry* probe = bucket(i);
probe != NULL;
probe = probe->next()) {
assert(probe->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");
assert(probe->error() != (Symbol*)NULL, "resolution error table is corrupt");
probe->oops_do(f);
}
}
}
// GC support
void ResolutionErrorEntry::oops_do(OopClosure* blk) {
blk->do_oop((oop*)pool_addr());
}
// Remove unloaded entries from the table
void ResolutionErrorTable::purge_resolution_errors(BoolObjectClosure* is_alive) {
assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
for (int i = 0; i < table_size(); i++) {
for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) {
ResolutionErrorEntry* entry = *p;
assert(entry->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");
constantPoolOop pool = entry->pool();
if (is_alive->do_object_b(pool)) {
p = entry->next_addr();
} else {
*p = entry->next();
free_entry(entry);
}
}
}
}
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