1 /* 2 * Copyright (c) 2013, 2019, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP 25 #define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP 26 27 #include "gc/shared/accessBarrierSupport.hpp" 28 #include "gc/shared/barrierSet.hpp" 29 #include "gc/shenandoah/shenandoahHeap.hpp" 30 #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp" 31 32 class ShenandoahBarrierSetAssembler; 33 34 class ShenandoahBarrierSet: public BarrierSet { 35 public: 36 enum ArrayCopyStoreValMode { 37 NONE, 38 RESOLVE_BARRIER, 39 EVAC_BARRIER 40 }; 41 private: 42 43 ShenandoahHeap* _heap; 44 BufferNode::Allocator _satb_mark_queue_buffer_allocator; 45 ShenandoahSATBMarkQueueSet _satb_mark_queue_set; 46 47 public: 48 ShenandoahBarrierSet(ShenandoahHeap* heap); 49 50 static ShenandoahBarrierSetAssembler* assembler(); 51 52 inline static ShenandoahBarrierSet* barrier_set() { 53 return barrier_set_cast<ShenandoahBarrierSet>(BarrierSet::barrier_set()); 54 } 55 56 static ShenandoahSATBMarkQueueSet& satb_mark_queue_set() { 57 return barrier_set()->_satb_mark_queue_set; 58 } 59 60 static bool need_load_reference_barrier(DecoratorSet decorators, BasicType type); 61 static bool use_load_reference_barrier_native(DecoratorSet decorators, BasicType type); 62 static bool need_keep_alive_barrier(DecoratorSet decorators, BasicType type); 63 64 void print_on(outputStream* st) const; 65 66 bool is_a(BarrierSet::Name bsn); 67 68 bool is_aligned(HeapWord* hw); 69 70 template <class T> void 71 write_ref_array_pre_work(T* src, T* dst, size_t count, bool dest_uninitialized); 72 73 inline void arraycopy_pre(oop* src, oop* dst, size_t count); 74 inline void arraycopy_pre(narrowOop* src, narrowOop* dst, size_t count); 75 inline void arraycopy_update(oop* src, size_t count); 76 inline void arraycopy_update(narrowOop* src, size_t count); 77 inline void clone_barrier(oop src); 78 void clone_barrier_runtime(oop src); 79 80 virtual void on_thread_create(Thread* thread); 81 virtual void on_thread_destroy(Thread* thread); 82 virtual void on_thread_attach(Thread* thread); 83 virtual void on_thread_detach(Thread* thread); 84 85 static inline oop resolve_forwarded_not_null(oop p); 86 static inline oop resolve_forwarded_not_null_mutator(oop p); 87 static inline oop resolve_forwarded(oop p); 88 89 template <DecoratorSet decorators, typename T> 90 inline void satb_barrier(T* field); 91 inline void satb_enqueue(oop value); 92 inline void storeval_barrier(oop obj); 93 94 template <DecoratorSet decorators> 95 inline void keep_alive_if_weak(oop value); 96 inline void keep_alive_if_weak(DecoratorSet decorators, oop value); 97 inline void keep_alive_barrier(oop value); 98 99 inline void enqueue(oop obj); 100 101 oop load_reference_barrier(oop obj); 102 oop load_reference_barrier_not_null(oop obj); 103 104 oop load_reference_barrier_mutator(oop obj, oop* load_addr); 105 oop load_reference_barrier_mutator(oop obj, narrowOop* load_addr); 106 107 template <class T> 108 oop load_reference_barrier_mutator_work(oop obj, T* load_addr); 109 110 oop load_reference_barrier_native(oop obj, oop* load_addr); 111 oop load_reference_barrier_native(oop obj, narrowOop* load_addr); 112 113 private: 114 template <class T> 115 inline void arraycopy_pre_work(T* src, T* dst, size_t count); 116 template <class T, bool HAS_FWD, bool EVAC, bool ENQUEUE> 117 inline void arraycopy_work(T* src, size_t count); 118 template <class T> 119 inline void arraycopy_update_impl(T* src, size_t count); 120 121 oop load_reference_barrier_impl(oop obj); 122 123 template <class T> 124 oop load_reference_barrier_native_impl(oop obj, T* load_addr); 125 126 inline bool skip_bulk_update(HeapWord* dst); 127 public: 128 // Callbacks for runtime accesses. 129 template <DecoratorSet decorators, typename BarrierSetT = ShenandoahBarrierSet> 130 class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> { 131 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw; 132 133 public: 134 // Heap oop accesses. These accessors get resolved when 135 // IN_HEAP is set (e.g. when using the HeapAccess API), it is 136 // an oop_* overload, and the barrier strength is AS_NORMAL. 137 template <typename T> 138 static oop oop_load_in_heap(T* addr); 139 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset); 140 141 template <typename T> 142 static void oop_store_in_heap(T* addr, oop value); 143 static void oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value); 144 145 template <typename T> 146 static oop oop_atomic_cmpxchg_in_heap(T* addr, oop compare_value, oop new_value); 147 static oop oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value); 148 149 template <typename T> 150 static oop oop_atomic_xchg_in_heap(T* addr, oop new_value); 151 static oop oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value); 152 153 template <typename T> 154 static bool oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw, 155 arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw, 156 size_t length); 157 158 // Clone barrier support 159 static void clone_in_heap(oop src, oop dst, size_t size); 160 161 // Needed for loads on non-heap weak references 162 template <typename T> 163 static oop oop_load_not_in_heap(T* addr); 164 165 // Used for catching bad stores 166 template <typename T> 167 static void oop_store_not_in_heap(T* addr, oop value); 168 169 template <typename T> 170 static oop oop_atomic_cmpxchg_not_in_heap(T* addr, oop compare_value, oop new_value); 171 172 template <typename T> 173 static oop oop_atomic_xchg_not_in_heap(T* addr, oop new_value); 174 175 }; 176 177 }; 178 179 template<> 180 struct BarrierSet::GetName<ShenandoahBarrierSet> { 181 static const BarrierSet::Name value = BarrierSet::ShenandoahBarrierSet; 182 }; 183 184 template<> 185 struct BarrierSet::GetType<BarrierSet::ShenandoahBarrierSet> { 186 typedef ::ShenandoahBarrierSet type; 187 }; 188 189 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP