author | stefank |
Thu, 22 Feb 2018 18:36:32 +0100 | |
changeset 49048 | 4e8c86b75428 |
parent 48966 | e6eb66d2e765 |
child 49164 | 7e958a8ebcd3 |
permissions | -rw-r--r-- |
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/* |
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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, AS_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_or_archive(DecoratorSet decorators, oop value) { |
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assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known"); |
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// Archive roots need to be enqueued since they add subgraphs to the |
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// Java heap that were not there at the snapshot when marking started. |
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// Weak and phantom references also need enqueueing for similar reasons. |
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const bool in_archive_root = (decorators & IN_ARCHIVE_ROOT) != 0; |
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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 = in_archive_root || (!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 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_or_archive(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_or_archive(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_or_archive(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 |