/* * Copyright (c) 2013, 2019, 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_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP #define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP #include "gc/shared/accessBarrierSupport.hpp" #include "gc/shared/barrierSet.hpp" #include "gc/shenandoah/shenandoahHeap.hpp" #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp" class ShenandoahBarrierSetAssembler; class ShenandoahBarrierSet: public BarrierSet { public: enum ArrayCopyStoreValMode { NONE, RESOLVE_BARRIER, EVAC_BARRIER }; private: ShenandoahHeap* _heap; BufferNode::Allocator _satb_mark_queue_buffer_allocator; ShenandoahSATBMarkQueueSet _satb_mark_queue_set; 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 barrier_set()->_satb_mark_queue_set; } static bool need_load_reference_barrier(DecoratorSet decorators, BasicType type); static bool use_load_reference_barrier_native(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(Thread* thread); virtual void on_thread_detach(Thread* 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); oop load_reference_barrier_native(oop obj, oop* load_addr); oop load_reference_barrier_native(oop obj, narrowOop* 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); template oop load_reference_barrier_native_impl(oop obj, T* load_addr); 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(T* addr, oop compare_value, oop new_value); static oop oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value); template static oop oop_atomic_xchg_in_heap(T* addr, oop new_value); static oop oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value); 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(T* addr, oop compare_value, oop new_value); template static oop oop_atomic_xchg_not_in_heap(T* addr, oop new_value); }; }; template<> struct BarrierSet::GetName { static const BarrierSet::Name value = BarrierSet::ShenandoahBarrierSet; }; template<> struct BarrierSet::GetType { typedef ::ShenandoahBarrierSet type; }; #endif // SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP