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100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/*
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* Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "precompiled.hpp"
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#include "gc/z/zLock.inline.hpp"
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#include "gc/z/zNMethodData.hpp"
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#include "memory/allocation.hpp"
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#include "runtime/atomic.hpp"
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#include "runtime/orderAccess.hpp"
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#include "utilities/align.hpp"
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#include "utilities/debug.hpp"
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#include "utilities/growableArray.hpp"
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size_t ZNMethodDataOops::header_size() {
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const size_t size = sizeof(ZNMethodDataOops);
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assert(is_aligned(size, sizeof(oop*)), "Header misaligned");
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return size;
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}
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ZNMethodDataOops* ZNMethodDataOops::create(const GrowableArray<oop*>& immediates, bool has_non_immediates) {
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// Allocate memory for the ZNMethodDataOops object
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// plus the immediate oop* array that follows right after.
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const size_t size = ZNMethodDataOops::header_size() + (sizeof(oop*) * immediates.length());
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void* const mem = NEW_C_HEAP_ARRAY(uint8_t, size, mtGC);
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return ::new (mem) ZNMethodDataOops(immediates, has_non_immediates);
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}
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void ZNMethodDataOops::destroy(ZNMethodDataOops* oops) {
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FREE_C_HEAP_ARRAY(uint8_t, oops);
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}
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ZNMethodDataOops::ZNMethodDataOops(const GrowableArray<oop*>& immediates, bool has_non_immediates) :
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_nimmediates(immediates.length()),
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_has_non_immediates(has_non_immediates) {
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// Save all immediate oops
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for (size_t i = 0; i < _nimmediates; i++) {
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immediates_begin()[i] = immediates.at(i);
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}
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}
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size_t ZNMethodDataOops::immediates_count() const {
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return _nimmediates;
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}
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oop** ZNMethodDataOops::immediates_begin() const {
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// The immediate oop* array starts immediately after this object
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return (oop**)((uintptr_t)this + header_size());
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}
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oop** ZNMethodDataOops::immediates_end() const {
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return immediates_begin() + immediates_count();
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}
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bool ZNMethodDataOops::has_non_immediates() const {
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return _has_non_immediates;
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}
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ZNMethodData::ZNMethodData() :
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_lock(),
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_oops(NULL) {}
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ZNMethodData::~ZNMethodData() {
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ZNMethodDataOops::destroy(_oops);
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}
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ZReentrantLock* ZNMethodData::lock() {
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return &_lock;
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}
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ZNMethodDataOops* ZNMethodData::oops() const {
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return OrderAccess::load_acquire(&_oops);
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}
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ZNMethodDataOops* ZNMethodData::swap_oops(ZNMethodDataOops* new_oops) {
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ZLocker<ZReentrantLock> locker(&_lock);
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ZNMethodDataOops* const old_oops = _oops;
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_oops = new_oops;
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return old_oops;
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}
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