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112 lines
4.2 KiB
C++
112 lines
4.2 KiB
C++
/*
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* Copyright (c) 2016, 2018, 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_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
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#define SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
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#include "gc/shared/accessBarrierSupport.inline.hpp"
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#include "gc/g1/g1SATBCardTableModRefBS.hpp"
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template <DecoratorSet decorators, typename T>
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inline void G1SATBCardTableModRefBS::write_ref_field_pre(T* field) {
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if (HasDecorator<decorators, ARRAYCOPY_DEST_NOT_INITIALIZED>::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 = oopDesc::load_heap_oop(field);
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if (!oopDesc::is_null(heap_oop)) {
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enqueue(oopDesc::decode_heap_oop_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 G1SATBCardTableLoggingModRefBS::write_ref_field_post(T* field, oop new_val) {
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volatile jbyte* byte = byte_for(field);
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if (*byte != g1_young_gen) {
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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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void G1SATBCardTableModRefBS::set_card_claimed(size_t card_index) {
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jbyte val = _byte_map[card_index];
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if (val == clean_card_val()) {
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val = (jbyte)claimed_card_val();
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} else {
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val |= (jbyte)claimed_card_val();
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}
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_byte_map[card_index] = val;
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}
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inline void G1SATBCardTableModRefBS::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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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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if (!peek && !on_strong_oop_ref && 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 G1SATBCardTableLoggingModRefBS::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 G1SATBCardTableLoggingModRefBS::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 G1SATBCardTableLoggingModRefBS::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 G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
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oop_store_not_in_heap(T* addr, oop new_value) {
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if (HasDecorator<decorators, IN_CONCURRENT_ROOT>::value) {
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// For roots not scanned in a safepoint, we have to apply SATB barriers
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// even for roots.
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G1SATBCardTableLoggingModRefBS *bs = barrier_set_cast<G1SATBCardTableLoggingModRefBS>(BarrierSet::barrier_set());
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bs->write_ref_field_pre<decorators>(addr);
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}
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Raw::oop_store(addr, new_value);
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}
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#endif // SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
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