109 lines
4.0 KiB
C++
109 lines
4.0 KiB
C++
/*
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* Copyright (c) 2016, 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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*/
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#ifndef SHARE_GC_G1_G1BARRIERSET_INLINE_HPP
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#define SHARE_GC_G1_G1BARRIERSET_INLINE_HPP
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#include "gc/g1/g1BarrierSet.hpp"
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#include "gc/g1/g1CardTable.hpp"
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#include "gc/shared/accessBarrierSupport.inline.hpp"
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#include "oops/access.inline.hpp"
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#include "oops/compressedOops.inline.hpp"
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#include "oops/oop.hpp"
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template <DecoratorSet decorators, typename T>
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inline void G1BarrierSet::write_ref_field_pre(T* field) {
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if (HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value ||
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HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
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return;
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}
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T heap_oop = RawAccess<MO_VOLATILE>::oop_load(field);
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if (!CompressedOops::is_null(heap_oop)) {
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enqueue(CompressedOops::decode_not_null(heap_oop));
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}
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}
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template <DecoratorSet decorators, typename T>
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inline void G1BarrierSet::write_ref_field_post(T* field, oop new_val) {
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volatile CardValue* byte = _card_table->byte_for(field);
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if (*byte != G1CardTable::g1_young_card_val()) {
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// Take a slow path for cards in old
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write_ref_field_post_slow(byte);
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}
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}
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inline void G1BarrierSet::enqueue_if_weak(DecoratorSet decorators, oop value) {
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assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
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// Loading from a weak or phantom reference needs enqueueing, as
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// the object may not have been reachable (part of the snapshot)
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// when marking started.
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const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0;
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const bool peek = (decorators & AS_NO_KEEPALIVE) != 0;
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const bool needs_enqueue = (!peek && !on_strong_oop_ref);
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if (needs_enqueue && value != NULL) {
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enqueue(value);
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}
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}
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template <DecoratorSet decorators, typename BarrierSetT>
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template <typename T>
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inline oop G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
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oop_load_not_in_heap(T* addr) {
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oop value = ModRef::oop_load_not_in_heap(addr);
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enqueue_if_weak(decorators, value);
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return value;
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}
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template <DecoratorSet decorators, typename BarrierSetT>
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template <typename T>
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inline oop G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
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oop_load_in_heap(T* addr) {
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oop value = ModRef::oop_load_in_heap(addr);
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enqueue_if_weak(decorators, value);
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return value;
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}
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template <DecoratorSet decorators, typename BarrierSetT>
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inline oop G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
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oop_load_in_heap_at(oop base, ptrdiff_t offset) {
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oop value = ModRef::oop_load_in_heap_at(base, offset);
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enqueue_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), value);
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return value;
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}
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template <DecoratorSet decorators, typename BarrierSetT>
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template <typename T>
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inline void G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
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oop_store_not_in_heap(T* addr, oop new_value) {
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// Apply SATB barriers for all non-heap references, to allow
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// concurrent scanning of such references.
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G1BarrierSet *bs = barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());
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bs->write_ref_field_pre<decorators>(addr);
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Raw::oop_store(addr, new_value);
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}
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#endif // SHARE_GC_G1_G1BARRIERSET_INLINE_HPP
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