--- /dev/null 2020-02-06 11:34:07.664987501 +0100 +++ new/src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.hpp 2020-02-06 19:19:29.956542752 +0100 @@ -0,0 +1,180 @@ +/* + * Copyright (c) 2013, 2018, Red Hat, Inc. All rights reserved. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP +#define SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP + +#include "gc/shared/accessBarrierSupport.hpp" +#include "gc/shared/barrierSet.hpp" +#include "gc/shenandoah/shenandoahHeap.hpp" +#include "gc/shenandoah/shenandoahSATBMarkQueue.hpp" + +class ShenandoahBarrierSetAssembler; + +class ShenandoahBarrierSet: public BarrierSet { +public: + enum ArrayCopyStoreValMode { + NONE, + RESOLVE_BARRIER, + EVAC_BARRIER + }; +private: + + static ShenandoahSATBMarkQueueSet _satb_mark_queue_set; + + ShenandoahHeap* _heap; + +public: + ShenandoahBarrierSet(ShenandoahHeap* heap); + + static ShenandoahBarrierSetAssembler* assembler(); + + inline static ShenandoahBarrierSet* barrier_set() { + return barrier_set_cast(BarrierSet::barrier_set()); + } + + static ShenandoahSATBMarkQueueSet& satb_mark_queue_set() { + return _satb_mark_queue_set; + } + + static bool need_load_reference_barrier(DecoratorSet decorators, BasicType type); + static bool need_keep_alive_barrier(DecoratorSet decorators, BasicType type); + + void print_on(outputStream* st) const; + + bool is_a(BarrierSet::Name bsn); + + bool is_aligned(HeapWord* hw); + + template void + write_ref_array_pre_work(T* src, T* dst, size_t count, bool dest_uninitialized); + + inline void arraycopy_pre(oop* src, oop* dst, size_t count); + inline void arraycopy_pre(narrowOop* src, narrowOop* dst, size_t count); + inline void arraycopy_update(oop* src, size_t count); + inline void arraycopy_update(narrowOop* src, size_t count); + inline void clone_barrier(oop src); + void clone_barrier_runtime(oop src); + + virtual void on_thread_create(Thread* thread); + virtual void on_thread_destroy(Thread* thread); + virtual void on_thread_attach(JavaThread* thread); + virtual void on_thread_detach(JavaThread* thread); + + static inline oop resolve_forwarded_not_null(oop p); + static inline oop resolve_forwarded(oop p); + + template + inline void satb_barrier(T* field); + inline void satb_enqueue(oop value); + inline void storeval_barrier(oop obj); + + template + inline void keep_alive_if_weak(oop value); + inline void keep_alive_if_weak(DecoratorSet decorators, oop value); + inline void keep_alive_barrier(oop value); + + inline void enqueue(oop obj); + + oop load_reference_barrier(oop obj); + oop load_reference_barrier_not_null(oop obj); + + oop load_reference_barrier_mutator(oop obj, oop* load_addr); + oop load_reference_barrier_mutator(oop obj, narrowOop* load_addr); + + template + oop load_reference_barrier_mutator_work(oop obj, T* load_addr); + +private: + template + inline void arraycopy_pre_work(T* src, T* dst, size_t count); + template + inline void arraycopy_work(T* src, size_t count); + template + inline void arraycopy_update_impl(T* src, size_t count); + + oop load_reference_barrier_impl(oop obj); + +public: + // Callbacks for runtime accesses. + template + class AccessBarrier: public BarrierSet::AccessBarrier { + typedef BarrierSet::AccessBarrier Raw; + + public: + // Heap oop accesses. These accessors get resolved when + // IN_HEAP is set (e.g. when using the HeapAccess API), it is + // an oop_* overload, and the barrier strength is AS_NORMAL. + template + static oop oop_load_in_heap(T* addr); + static oop oop_load_in_heap_at(oop base, ptrdiff_t offset); + + template + static void oop_store_in_heap(T* addr, oop value); + static void oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value); + + template + static oop oop_atomic_cmpxchg_in_heap(oop new_value, T* addr, oop compare_value); + static oop oop_atomic_cmpxchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset, oop compare_value); + + template + static oop oop_atomic_xchg_in_heap(oop new_value, T* addr); + static oop oop_atomic_xchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset); + + template + static bool oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw, + arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw, + size_t length); + + // Clone barrier support + static void clone_in_heap(oop src, oop dst, size_t size); + + // Needed for loads on non-heap weak references + template + static oop oop_load_not_in_heap(T* addr); + + // Used for catching bad stores + template + static void oop_store_not_in_heap(T* addr, oop value); + + template + static oop oop_atomic_cmpxchg_not_in_heap(oop new_value, T* addr, oop compare_value); + + template + static oop oop_atomic_xchg_not_in_heap(oop new_value, T* addr); + + }; + +}; + +template<> +struct BarrierSet::GetName { + static const BarrierSet::Name value = BarrierSet::ShenandoahBarrierSet; +}; + +template<> +struct BarrierSet::GetType { + typedef ::ShenandoahBarrierSet type; +}; + +#endif //SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP