author | rkennke |
Wed, 08 May 2019 20:45:30 +0200 | |
changeset 54766 | 1321f8cf9de5 |
parent 54425 | 13c02cc7a6e5 |
child 55015 | 738285c4d1e1 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved. |
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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_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP |
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#define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP |
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#include "gc/shared/barrierSet.hpp" |
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#include "gc/shenandoah/shenandoahBarrierSet.hpp" |
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#include "gc/shenandoah/shenandoahForwarding.inline.hpp" |
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#include "gc/shenandoah/shenandoahHeap.inline.hpp" |
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#include "gc/shenandoah/shenandoahHeapRegion.hpp" |
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#include "gc/shenandoah/shenandoahMarkingContext.inline.hpp" |
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#include "gc/shenandoah/shenandoahThreadLocalData.hpp" |
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inline oop ShenandoahBarrierSet::resolve_forwarded_not_null(oop p) { |
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return ShenandoahForwarding::get_forwardee(p); |
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} |
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|
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inline oop ShenandoahBarrierSet::resolve_forwarded(oop p) { |
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if (((HeapWord*) p) != NULL) { |
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return resolve_forwarded_not_null(p); |
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} else { |
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return p; |
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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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap(T* addr) { |
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oop value = Raw::oop_load_in_heap(addr); |
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value = ShenandoahBarrierSet::barrier_set()->load_reference_barrier(value); |
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keep_alive_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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap_at(oop base, ptrdiff_t offset) { |
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oop value = Raw::oop_load_in_heap_at(base, offset); |
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value = ShenandoahBarrierSet::barrier_set()->load_reference_barrier(value); |
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keep_alive_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 oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(T* addr) { |
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oop value = Raw::oop_load_not_in_heap(addr); |
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value = ShenandoahBarrierSet::barrier_set()->load_reference_barrier(value); |
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keep_alive_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 void ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap(T* addr, oop value) { |
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ShenandoahBarrierSet::barrier_set()->storeval_barrier(value); |
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const bool keep_alive = (decorators & AS_NO_KEEPALIVE) == 0; |
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if (keep_alive) { |
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ShenandoahBarrierSet::barrier_set()->write_ref_field_pre_work(addr, value); |
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} |
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Raw::oop_store_in_heap(addr, value); |
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} |
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template <DecoratorSet decorators, typename BarrierSetT> |
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inline void ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) { |
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oop_store_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), 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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_not_in_heap(oop new_value, T* addr, oop compare_value) { |
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oop res; |
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oop expected = compare_value; |
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do { |
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compare_value = expected; |
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res = Raw::oop_atomic_cmpxchg(new_value, addr, compare_value); |
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expected = res; |
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} while ((! oopDesc::equals_raw(compare_value, expected)) && oopDesc::equals_raw(resolve_forwarded(compare_value), resolve_forwarded(expected))); |
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if (res != NULL) { |
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return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_not_null(res); |
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} else { |
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return res; |
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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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap_impl(oop new_value, T* addr, oop compare_value) { |
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ShenandoahBarrierSet::barrier_set()->storeval_barrier(new_value); |
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oop result = oop_atomic_cmpxchg_not_in_heap(new_value, addr, compare_value); |
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const bool keep_alive = (decorators & AS_NO_KEEPALIVE) == 0; |
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if (keep_alive && ShenandoahSATBBarrier && !CompressedOops::is_null(result) && |
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oopDesc::equals_raw(result, compare_value) && |
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ShenandoahHeap::heap()->is_concurrent_mark_in_progress()) { |
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ShenandoahBarrierSet::barrier_set()->enqueue(result); |
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} |
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return result; |
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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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap(oop new_value, T* addr, oop compare_value) { |
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oop result = oop_atomic_cmpxchg_in_heap_impl(new_value, addr, compare_value); |
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keep_alive_if_weak(decorators, result); |
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return result; |
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} |
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template <DecoratorSet decorators, typename BarrierSetT> |
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inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset, oop compare_value) { |
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oop result = oop_atomic_cmpxchg_in_heap_impl(new_value, AccessInternal::oop_field_addr<decorators>(base, offset), compare_value); |
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keep_alive_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), result); |
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return result; |
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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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(oop new_value, T* addr) { |
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oop previous = Raw::oop_atomic_xchg(new_value, addr); |
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if (previous != NULL) { |
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return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_not_null(previous); |
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} else { |
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return previous; |
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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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_impl(oop new_value, T* addr) { |
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ShenandoahBarrierSet::barrier_set()->storeval_barrier(new_value); |
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oop result = oop_atomic_xchg_not_in_heap(new_value, addr); |
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const bool keep_alive = (decorators & AS_NO_KEEPALIVE) == 0; |
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if (keep_alive && ShenandoahSATBBarrier && !CompressedOops::is_null(result) && |
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ShenandoahHeap::heap()->is_concurrent_mark_in_progress()) { |
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ShenandoahBarrierSet::barrier_set()->enqueue(result); |
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} |
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return result; |
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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 ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(oop new_value, T* addr) { |
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oop result = oop_atomic_xchg_in_heap_impl(new_value, addr); |
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keep_alive_if_weak(addr, result); |
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return result; |
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} |
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template <DecoratorSet decorators, typename BarrierSetT> |
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inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset) { |
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oop result = oop_atomic_xchg_in_heap_impl(new_value, AccessInternal::oop_field_addr<decorators>(base, offset)); |
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keep_alive_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), result); |
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return result; |
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} |
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template <typename T> |
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bool ShenandoahBarrierSet::arraycopy_loop_1(T* src, T* dst, size_t length, Klass* bound, |
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bool checkcast, bool satb, bool disjoint, |
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ShenandoahBarrierSet::ArrayCopyStoreValMode storeval_mode) { |
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if (checkcast) { |
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179 |
return arraycopy_loop_2<T, true>(src, dst, length, bound, satb, disjoint, storeval_mode); |
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180 |
} else { |
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181 |
return arraycopy_loop_2<T, false>(src, dst, length, bound, satb, disjoint, storeval_mode); |
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182 |
} |
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183 |
} |
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184 |
|
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185 |
template <typename T, bool CHECKCAST> |
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186 |
bool ShenandoahBarrierSet::arraycopy_loop_2(T* src, T* dst, size_t length, Klass* bound, |
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187 |
bool satb, bool disjoint, |
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188 |
ShenandoahBarrierSet::ArrayCopyStoreValMode storeval_mode) { |
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189 |
if (satb) { |
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190 |
return arraycopy_loop_3<T, CHECKCAST, true>(src, dst, length, bound, disjoint, storeval_mode); |
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191 |
} else { |
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192 |
return arraycopy_loop_3<T, CHECKCAST, false>(src, dst, length, bound, disjoint, storeval_mode); |
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193 |
} |
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194 |
} |
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195 |
|
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196 |
template <typename T, bool CHECKCAST, bool SATB> |
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197 |
bool ShenandoahBarrierSet::arraycopy_loop_3(T* src, T* dst, size_t length, Klass* bound, bool disjoint, |
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198 |
ShenandoahBarrierSet::ArrayCopyStoreValMode storeval_mode) { |
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199 |
switch (storeval_mode) { |
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200 |
case NONE: |
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201 |
return arraycopy_loop<T, CHECKCAST, SATB, NONE>(src, dst, length, bound, disjoint); |
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202 |
case READ_BARRIER: |
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203 |
return arraycopy_loop<T, CHECKCAST, SATB, READ_BARRIER>(src, dst, length, bound, disjoint); |
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204 |
case WRITE_BARRIER: |
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205 |
return arraycopy_loop<T, CHECKCAST, SATB, WRITE_BARRIER>(src, dst, length, bound, disjoint); |
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206 |
default: |
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207 |
ShouldNotReachHere(); |
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208 |
return true; // happy compiler |
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209 |
} |
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210 |
} |
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211 |
|
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212 |
template <typename T, bool CHECKCAST, bool SATB, ShenandoahBarrierSet::ArrayCopyStoreValMode STOREVAL_MODE> |
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213 |
bool ShenandoahBarrierSet::arraycopy_loop(T* src, T* dst, size_t length, Klass* bound, bool disjoint) { |
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214 |
Thread* thread = Thread::current(); |
54383 | 215 |
ShenandoahMarkingContext* ctx = _heap->marking_context(); |
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216 |
ShenandoahEvacOOMScope oom_evac_scope; |
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217 |
|
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218 |
// We need to handle four cases: |
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219 |
// |
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220 |
// a) src < dst, conjoint, can only copy backward only |
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221 |
// [...src...] |
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222 |
// [...dst...] |
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223 |
// |
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224 |
// b) src < dst, disjoint, can only copy forward, because types may mismatch |
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225 |
// [...src...] |
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226 |
// [...dst...] |
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227 |
// |
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228 |
// c) src > dst, conjoint, can copy forward only |
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229 |
// [...src...] |
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230 |
// [...dst...] |
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231 |
// |
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232 |
// d) src > dst, disjoint, can only copy forward, because types may mismatch |
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233 |
// [...src...] |
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234 |
// [...dst...] |
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235 |
// |
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236 |
if (src > dst || disjoint) { |
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237 |
// copy forward: |
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238 |
T* cur_src = src; |
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239 |
T* cur_dst = dst; |
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240 |
T* src_end = src + length; |
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241 |
for (; cur_src < src_end; cur_src++, cur_dst++) { |
54383 | 242 |
if (!arraycopy_element<T, CHECKCAST, SATB, STOREVAL_MODE>(cur_src, cur_dst, bound, thread, ctx)) { |
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243 |
return false; |
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244 |
} |
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245 |
} |
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246 |
} else { |
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247 |
// copy backward: |
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248 |
T* cur_src = src + length - 1; |
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249 |
T* cur_dst = dst + length - 1; |
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250 |
for (; cur_src >= src; cur_src--, cur_dst--) { |
54383 | 251 |
if (!arraycopy_element<T, CHECKCAST, SATB, STOREVAL_MODE>(cur_src, cur_dst, bound, thread, ctx)) { |
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252 |
return false; |
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253 |
} |
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254 |
} |
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255 |
} |
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256 |
return true; |
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257 |
} |
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258 |
|
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259 |
template <typename T, bool CHECKCAST, bool SATB, ShenandoahBarrierSet::ArrayCopyStoreValMode STOREVAL_MODE> |
54383 | 260 |
bool ShenandoahBarrierSet::arraycopy_element(T* cur_src, T* cur_dst, Klass* bound, Thread* const thread, ShenandoahMarkingContext* const ctx) { |
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261 |
T o = RawAccess<>::oop_load(cur_src); |
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262 |
|
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263 |
if (SATB) { |
54383 | 264 |
assert(ShenandoahThreadLocalData::satb_mark_queue(thread).is_active(), "Shouldn't be here otherwise"); |
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265 |
T prev = RawAccess<>::oop_load(cur_dst); |
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266 |
if (!CompressedOops::is_null(prev)) { |
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267 |
oop prev_obj = CompressedOops::decode_not_null(prev); |
54383 | 268 |
switch (STOREVAL_MODE) { |
269 |
case NONE: |
|
270 |
break; |
|
271 |
case READ_BARRIER: |
|
272 |
case WRITE_BARRIER: |
|
273 |
// The write-barrier case cannot really happen. It's traversal-only and traversal |
|
274 |
// doesn't currently use SATB. And even if it did, it would not be fatal to just do the normal RB here. |
|
275 |
prev_obj = ShenandoahBarrierSet::resolve_forwarded_not_null(prev_obj); |
|
276 |
} |
|
277 |
if (!ctx->is_marked(prev_obj)) { |
|
278 |
ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue_known_active(prev_obj); |
|
279 |
} |
|
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280 |
} |
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281 |
} |
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282 |
|
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283 |
if (!CompressedOops::is_null(o)) { |
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284 |
oop obj = CompressedOops::decode_not_null(o); |
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285 |
|
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286 |
if (CHECKCAST) { |
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287 |
assert(bound != NULL, "need element klass for checkcast"); |
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288 |
if (!oopDesc::is_instanceof_or_null(obj, bound)) { |
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289 |
return false; |
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290 |
} |
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291 |
} |
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292 |
|
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293 |
switch (STOREVAL_MODE) { |
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case NONE: |
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295 |
break; |
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296 |
case READ_BARRIER: |
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obj = ShenandoahBarrierSet::resolve_forwarded_not_null(obj); |
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298 |
break; |
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299 |
case WRITE_BARRIER: |
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if (_heap->in_collection_set(obj)) { |
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oop forw = ShenandoahBarrierSet::resolve_forwarded_not_null(obj); |
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302 |
if (oopDesc::equals_raw(forw, obj)) { |
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303 |
forw = _heap->evacuate_object(forw, thread); |
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304 |
} |
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305 |
obj = forw; |
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306 |
} |
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307 |
enqueue(obj); |
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|
308 |
break; |
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|
309 |
default: |
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310 |
ShouldNotReachHere(); |
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311 |
} |
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312 |
|
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313 |
RawAccess<IS_NOT_NULL>::oop_store(cur_dst, obj); |
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314 |
} else { |
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315 |
// Store null. |
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316 |
RawAccess<>::oop_store(cur_dst, o); |
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317 |
} |
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318 |
return true; |
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319 |
} |
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|
320 |
|
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321 |
// Clone barrier support |
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322 |
template <DecoratorSet decorators, typename BarrierSetT> |
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323 |
void ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::clone_in_heap(oop src, oop dst, size_t size) { |
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324 |
Raw::clone(src, dst, size); |
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325 |
ShenandoahBarrierSet::barrier_set()->write_region(MemRegion((HeapWord*) dst, size)); |
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|
326 |
} |
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|
327 |
|
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|
328 |
template <DecoratorSet decorators, typename BarrierSetT> |
9c18c9d839d3
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329 |
template <typename T> |
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330 |
bool ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw, |
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331 |
arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw, |
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|
332 |
size_t length) { |
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|
333 |
ShenandoahHeap* heap = ShenandoahHeap::heap(); |
9c18c9d839d3
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|
334 |
bool satb = ShenandoahSATBBarrier && heap->is_concurrent_mark_in_progress(); |
9c18c9d839d3
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335 |
bool checkcast = HasDecorator<decorators, ARRAYCOPY_CHECKCAST>::value; |
9c18c9d839d3
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|
336 |
bool disjoint = HasDecorator<decorators, ARRAYCOPY_DISJOINT>::value; |
9c18c9d839d3
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337 |
ArrayCopyStoreValMode storeval_mode; |
9c18c9d839d3
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|
338 |
if (heap->has_forwarded_objects()) { |
9c18c9d839d3
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|
339 |
if (heap->is_concurrent_traversal_in_progress()) { |
9c18c9d839d3
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|
340 |
storeval_mode = WRITE_BARRIER; |
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|
341 |
} else if (heap->is_update_refs_in_progress()) { |
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342 |
storeval_mode = READ_BARRIER; |
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|
343 |
} else { |
9c18c9d839d3
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|
344 |
assert(heap->is_idle() || heap->is_evacuation_in_progress(), "must not have anything in progress"); |
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|
345 |
storeval_mode = NONE; // E.g. during evac or outside cycle |
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|
346 |
} |
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|
347 |
} else { |
9c18c9d839d3
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|
348 |
assert(heap->is_stable() || heap->is_concurrent_mark_in_progress(), "must not have anything in progress"); |
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|
349 |
storeval_mode = NONE; |
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|
350 |
} |
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|
351 |
|
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|
352 |
if (!satb && !checkcast && storeval_mode == NONE) { |
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|
353 |
// Short-circuit to bulk copy. |
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354 |
return Raw::oop_arraycopy(src_obj, src_offset_in_bytes, src_raw, dst_obj, dst_offset_in_bytes, dst_raw, length); |
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|
355 |
} |
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|
356 |
|
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|
357 |
src_raw = arrayOopDesc::obj_offset_to_raw(src_obj, src_offset_in_bytes, src_raw); |
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|
358 |
dst_raw = arrayOopDesc::obj_offset_to_raw(dst_obj, dst_offset_in_bytes, dst_raw); |
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|
359 |
|
9c18c9d839d3
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|
360 |
Klass* bound = objArrayOop(dst_obj)->element_klass(); |
9c18c9d839d3
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|
361 |
ShenandoahBarrierSet* bs = ShenandoahBarrierSet::barrier_set(); |
9c18c9d839d3
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|
362 |
return bs->arraycopy_loop_1(src_raw, dst_raw, length, bound, checkcast, satb, disjoint, storeval_mode); |
9c18c9d839d3
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|
363 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
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|
364 |
|
53244
9807daeb47c4
8216167: Update include guards to reflect correct directories
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|
365 |
#endif // SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP |