1 /* 2 * Copyright (c) 2013, 2019, Red Hat, Inc. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP 26 #define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP 27 28 #include "gc/shared/accessBarrierSupport.hpp" 29 #include "gc/shared/barrierSet.hpp" 30 #include "gc/shenandoah/shenandoahHeap.hpp" 31 #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp" 32 33 class ShenandoahBarrierSetAssembler; 34 35 class ShenandoahBarrierSet: public BarrierSet { 36 public: 37 enum ArrayCopyStoreValMode { 38 NONE, 39 RESOLVE_BARRIER, 40 EVAC_BARRIER 41 }; 42 private: 43 44 ShenandoahHeap* _heap; 45 BufferNode::Allocator _satb_mark_queue_buffer_allocator; 46 ShenandoahSATBMarkQueueSet _satb_mark_queue_set; 47 48 public: 49 ShenandoahBarrierSet(ShenandoahHeap* heap); 50 51 static ShenandoahBarrierSetAssembler* assembler(); 52 53 inline static ShenandoahBarrierSet* barrier_set() { 54 return barrier_set_cast<ShenandoahBarrierSet>(BarrierSet::barrier_set()); 55 } 56 57 static ShenandoahSATBMarkQueueSet& satb_mark_queue_set() { 58 return barrier_set()->_satb_mark_queue_set; 59 } 60 61 static bool need_load_reference_barrier(DecoratorSet decorators, BasicType type); 62 static bool use_load_reference_barrier_native(DecoratorSet decorators, BasicType type); 63 static bool need_keep_alive_barrier(DecoratorSet decorators, BasicType type); 64 65 void print_on(outputStream* st) const; 66 67 bool is_a(BarrierSet::Name bsn); 68 69 bool is_aligned(HeapWord* hw); 70 71 template <class T> void 72 write_ref_array_pre_work(T* src, T* dst, size_t count, bool dest_uninitialized); 73 74 inline void arraycopy_pre(oop* src, oop* dst, size_t count); 75 inline void arraycopy_pre(narrowOop* src, narrowOop* dst, size_t count); 76 inline void arraycopy_update(oop* src, size_t count); 77 inline void arraycopy_update(narrowOop* src, size_t count); 78 inline void clone_barrier(oop src); 79 void clone_barrier_runtime(oop src); 80 81 virtual void on_thread_create(Thread* thread); 82 virtual void on_thread_destroy(Thread* thread); 83 virtual void on_thread_attach(Thread* thread); 84 virtual void on_thread_detach(Thread* thread); 85 86 static inline oop resolve_forwarded_not_null(oop p); 87 static inline oop resolve_forwarded_not_null_mutator(oop p); 88 static inline oop resolve_forwarded(oop p); 89 90 template <DecoratorSet decorators, typename T> 91 inline void satb_barrier(T* field); 92 inline void satb_enqueue(oop value); 93 inline void storeval_barrier(oop obj); 94 95 template <DecoratorSet decorators> 96 inline void keep_alive_if_weak(oop value); 97 inline void keep_alive_if_weak(DecoratorSet decorators, oop value); 98 inline void keep_alive_barrier(oop value); 99 100 inline void enqueue(oop obj); 101 102 oop load_reference_barrier(oop obj); 103 oop load_reference_barrier_not_null(oop obj); 104 105 oop load_reference_barrier_mutator(oop obj, oop* load_addr); 106 oop load_reference_barrier_mutator(oop obj, narrowOop* load_addr); 107 108 template <class T> 109 oop load_reference_barrier_mutator_work(oop obj, T* load_addr); 110 111 oop load_reference_barrier_native(oop obj, oop* load_addr); 112 oop load_reference_barrier_native(oop obj, narrowOop* load_addr); 113 114 private: 115 template <class T> 116 inline void arraycopy_pre_work(T* src, T* dst, size_t count); 117 template <class T, bool HAS_FWD, bool EVAC, bool ENQUEUE> 118 inline void arraycopy_work(T* src, size_t count); 119 template <class T> 120 inline void arraycopy_update_impl(T* src, size_t count); 121 122 oop load_reference_barrier_impl(oop obj); 123 124 template <class T> 125 oop load_reference_barrier_native_impl(oop obj, T* load_addr); 126 127 inline bool skip_bulk_update(HeapWord* dst); 128 public: 129 // Callbacks for runtime accesses. 130 template <DecoratorSet decorators, typename BarrierSetT = ShenandoahBarrierSet> 131 class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> { 132 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw; 133 134 public: 135 // Heap oop accesses. These accessors get resolved when 136 // IN_HEAP is set (e.g. when using the HeapAccess API), it is 137 // an oop_* overload, and the barrier strength is AS_NORMAL. 138 template <typename T> 139 static oop oop_load_in_heap(T* addr); 140 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset); 141 142 template <typename T> 143 static void oop_store_in_heap(T* addr, oop value); 144 static void oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value); 145 146 template <typename T> 147 static oop oop_atomic_cmpxchg_in_heap(T* addr, oop compare_value, oop new_value); 148 static oop oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value); 149 150 template <typename T> 151 static oop oop_atomic_xchg_in_heap(T* addr, oop new_value); 152 static oop oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value); 153 154 template <typename T> 155 static bool oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw, 156 arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw, 157 size_t length); 158 159 // Clone barrier support 160 static void clone_in_heap(oop src, oop dst, size_t size); 161 162 // Needed for loads on non-heap weak references 163 template <typename T> 164 static oop oop_load_not_in_heap(T* addr); 165 166 // Used for catching bad stores 167 template <typename T> 168 static void oop_store_not_in_heap(T* addr, oop value); 169 170 template <typename T> 171 static oop oop_atomic_cmpxchg_not_in_heap(T* addr, oop compare_value, oop new_value); 172 173 template <typename T> 174 static oop oop_atomic_xchg_not_in_heap(T* addr, oop new_value); 175 176 }; 177 178 }; 179 180 template<> 181 struct BarrierSet::GetName<ShenandoahBarrierSet> { 182 static const BarrierSet::Name value = BarrierSet::ShenandoahBarrierSet; 183 }; 184 185 template<> 186 struct BarrierSet::GetType<BarrierSet::ShenandoahBarrierSet> { 187 typedef ::ShenandoahBarrierSet type; 188 }; 189 190 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP