108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright (c) 2015, 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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#ifndef SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP
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#define SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP
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#include "classfile/classLoaderData.hpp"
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#include "gc/z/zBarrier.inline.hpp"
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#include "gc/z/zHeap.inline.hpp"
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#include "gc/z/zOop.inline.hpp"
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#include "gc/z/zOopClosures.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/atomic.hpp"
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#include "utilities/debug.hpp"
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inline void ZLoadBarrierOopClosure::do_oop(oop* p) {
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ZBarrier::load_barrier_on_oop_field(p);
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}
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inline void ZLoadBarrierOopClosure::do_oop(narrowOop* p) {
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ShouldNotReachHere();
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}
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inline void ZNMethodOopClosure::do_oop(oop* p) {
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if (ZResurrection::is_blocked()) {
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ZBarrier::keep_alive_barrier_on_phantom_root_oop_field(p);
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} else {
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ZBarrier::load_barrier_on_root_oop_field(p);
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}
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}
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inline void ZNMethodOopClosure::do_oop(narrowOop* p) {
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ShouldNotReachHere();
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}
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template <bool finalizable>
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inline ZMarkBarrierOopClosure<finalizable>::ZMarkBarrierOopClosure() :
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ClaimMetadataVisitingOopIterateClosure(finalizable
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? ClassLoaderData::_claim_finalizable
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: ClassLoaderData::_claim_strong,
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finalizable
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? NULL
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: ZHeap::heap()->reference_discoverer()) {}
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template <bool finalizable>
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inline void ZMarkBarrierOopClosure<finalizable>::do_oop(oop* p) {
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ZBarrier::mark_barrier_on_oop_field(p, finalizable);
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}
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template <bool finalizable>
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inline void ZMarkBarrierOopClosure<finalizable>::do_oop(narrowOop* p) {
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ShouldNotReachHere();
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}
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inline bool ZPhantomIsAliveObjectClosure::do_object_b(oop o) {
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return ZBarrier::is_alive_barrier_on_phantom_oop(o);
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}
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inline void ZPhantomKeepAliveOopClosure::do_oop(oop* p) {
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ZBarrier::keep_alive_barrier_on_phantom_oop_field(p);
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}
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inline void ZPhantomKeepAliveOopClosure::do_oop(narrowOop* p) {
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ShouldNotReachHere();
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}
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inline void ZPhantomCleanOopClosure::do_oop(oop* p) {
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// Read the oop once, to make sure the liveness check
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// and the later clearing uses the same value.
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const oop obj = *(volatile oop*)p;
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if (ZBarrier::is_alive_barrier_on_phantom_oop(obj)) {
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ZBarrier::keep_alive_barrier_on_phantom_oop_field(p);
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} else {
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// The destination could have been modified/reused, in which case
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// we don't want to clear it. However, no one could write the same
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// oop here again (the object would be strongly live and we would
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// not consider clearing such oops), so therefore we don't have an
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// ABA problem here.
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Atomic::cmpxchg(p, obj, oop(NULL));
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}
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}
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inline void ZPhantomCleanOopClosure::do_oop(narrowOop* p) {
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ShouldNotReachHere();
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}
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#endif // SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP
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