author | rkennke |
Mon, 18 Mar 2019 16:33:28 +0100 | |
changeset 54179 | e81b44c68680 |
parent 54006 | a421bdf22394 |
child 54383 | cdc3bb0983a6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2013, 2019, 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_HPP |
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#define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP |
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#include "gc/shared/accessBarrierSupport.hpp" |
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#include "gc/shared/barrierSet.hpp" |
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#include "gc/shenandoah/shenandoahHeap.hpp" |
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#include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp" |
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class ShenandoahBarrierSetAssembler; |
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class ShenandoahBarrierSet: public BarrierSet { |
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private: |
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enum ArrayCopyStoreValMode { |
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NONE, |
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READ_BARRIER, |
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WRITE_BARRIER |
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}; |
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ShenandoahHeap* _heap; |
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ShenandoahSATBMarkQueueSet _satb_mark_queue_set; |
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public: |
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ShenandoahBarrierSet(ShenandoahHeap* heap); |
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static ShenandoahBarrierSetAssembler* assembler(); |
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inline static ShenandoahBarrierSet* barrier_set() { |
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return barrier_set_cast<ShenandoahBarrierSet>(BarrierSet::barrier_set()); |
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} |
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static ShenandoahSATBMarkQueueSet& satb_mark_queue_set() { |
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return barrier_set()->_satb_mark_queue_set; |
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} |
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void print_on(outputStream* st) const; |
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bool is_a(BarrierSet::Name bsn); |
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bool is_aligned(HeapWord* hw); |
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void write_ref_array(HeapWord* start, size_t count); |
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template <class T> void |
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write_ref_array_pre_work(T* dst, size_t count); |
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void write_ref_array_pre(oop* dst, size_t count, bool dest_uninitialized); |
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void write_ref_array_pre(narrowOop* dst, size_t count, bool dest_uninitialized); |
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// We export this to make it available in cases where the static |
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// type of the barrier set is known. Note that it is non-virtual. |
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template <class T> inline void inline_write_ref_field_pre(T* field, oop new_val); |
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// These are the more general virtual versions. |
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void write_ref_field_pre_work(oop* field, oop new_val); |
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void write_ref_field_pre_work(narrowOop* field, oop new_val); |
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void write_ref_field_pre_work(void* field, oop new_val); |
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void write_ref_field_work(void* v, oop o, bool release = false); |
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void write_region(MemRegion mr); |
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virtual void on_thread_create(Thread* thread); |
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virtual void on_thread_destroy(Thread* thread); |
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virtual void on_thread_attach(Thread* thread); |
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virtual void on_thread_detach(Thread* thread); |
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virtual oop read_barrier(oop src); |
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static inline oop resolve_forwarded_not_null(oop p); |
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static inline oop resolve_forwarded(oop p); |
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virtual oop write_barrier(oop obj); |
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oop write_barrier_mutator(oop obj); |
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virtual oop storeval_barrier(oop obj); |
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virtual void keep_alive_barrier(oop obj); |
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bool obj_equals(oop obj1, oop obj2); |
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#ifdef CHECK_UNHANDLED_OOPS |
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bool oop_equals_operator_allowed() { return !ShenandoahVerifyObjectEquals; } |
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#endif |
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108 |
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void enqueue(oop obj); |
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110 |
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private: |
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112 |
inline bool need_update_refs_barrier(); |
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113 |
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template <class T, bool STOREVAL_WRITE_BARRIER> |
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void write_ref_array_loop(HeapWord* start, size_t count); |
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116 |
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oop write_barrier_impl(oop obj); |
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118 |
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static void keep_alive_if_weak(DecoratorSet decorators, oop value) { |
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assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known"); |
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const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0; |
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const bool peek = (decorators & AS_NO_KEEPALIVE) != 0; |
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if (!peek && !on_strong_oop_ref && value != NULL) { |
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ShenandoahBarrierSet::barrier_set()->keep_alive_barrier(value); |
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125 |
} |
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126 |
} |
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127 |
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128 |
template <typename T> |
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bool arraycopy_loop_1(T* src, T* dst, size_t length, Klass* bound, |
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bool checkcast, bool satb, bool disjoint, ShenandoahBarrierSet::ArrayCopyStoreValMode storeval_mode); |
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131 |
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132 |
template <typename T, bool CHECKCAST> |
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bool arraycopy_loop_2(T* src, T* dst, size_t length, Klass* bound, |
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bool satb, bool disjoint, ShenandoahBarrierSet::ArrayCopyStoreValMode storeval_mode); |
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135 |
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136 |
template <typename T, bool CHECKCAST, bool SATB> |
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137 |
bool arraycopy_loop_3(T* src, T* dst, size_t length, Klass* bound, |
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bool disjoint, ShenandoahBarrierSet::ArrayCopyStoreValMode storeval_mode); |
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139 |
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140 |
template <typename T, bool CHECKCAST, bool SATB, ShenandoahBarrierSet::ArrayCopyStoreValMode STOREVAL_MODE> |
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141 |
bool arraycopy_loop(T* src, T* dst, size_t length, Klass* bound, bool disjoint); |
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142 |
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143 |
template <typename T, bool CHECKCAST, bool SATB, ShenandoahBarrierSet::ArrayCopyStoreValMode STOREVAL_MODE> |
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bool arraycopy_element(T* cur_src, T* cur_dst, Klass* bound, Thread* thread); |
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145 |
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146 |
public: |
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// Callbacks for runtime accesses. |
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template <DecoratorSet decorators, typename BarrierSetT = ShenandoahBarrierSet> |
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class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> { |
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typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw; |
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151 |
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152 |
public: |
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153 |
// Primitive heap accesses. These accessors get resolved when |
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// IN_HEAP is set (e.g. when using the HeapAccess API), it is |
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// not an oop_* overload, and the barrier strength is AS_NORMAL. |
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156 |
template <typename T> |
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157 |
static T load_in_heap(T* addr) { |
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158 |
ShouldNotReachHere(); |
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return Raw::template load<T>(addr); |
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160 |
} |
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161 |
|
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162 |
template <typename T> |
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163 |
static T load_in_heap_at(oop base, ptrdiff_t offset) { |
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base = ShenandoahBarrierSet::resolve_forwarded(base); |
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return Raw::template load_at<T>(base, offset); |
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166 |
} |
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167 |
|
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168 |
template <typename T> |
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169 |
static void store_in_heap(T* addr, T value) { |
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ShouldNotReachHere(); |
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171 |
Raw::store(addr, value); |
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172 |
} |
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173 |
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174 |
template <typename T> |
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175 |
static void store_in_heap_at(oop base, ptrdiff_t offset, T value) { |
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176 |
base = ShenandoahBarrierSet::barrier_set()->write_barrier(base); |
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Raw::store_at(base, offset, value); |
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178 |
} |
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179 |
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180 |
template <typename T> |
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181 |
static T atomic_cmpxchg_in_heap(T new_value, T* addr, T compare_value) { |
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ShouldNotReachHere(); |
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183 |
return Raw::atomic_cmpxchg(new_value, addr, compare_value); |
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184 |
} |
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185 |
|
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186 |
template <typename T> |
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187 |
static T atomic_cmpxchg_in_heap_at(T new_value, oop base, ptrdiff_t offset, T compare_value) { |
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188 |
base = ShenandoahBarrierSet::barrier_set()->write_barrier(base); |
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189 |
return Raw::atomic_cmpxchg_at(new_value, base, offset, compare_value); |
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190 |
} |
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191 |
|
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192 |
template <typename T> |
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193 |
static T atomic_xchg_in_heap(T new_value, T* addr) { |
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194 |
ShouldNotReachHere(); |
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195 |
return Raw::atomic_xchg(new_value, addr); |
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196 |
} |
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197 |
|
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198 |
template <typename T> |
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199 |
static T atomic_xchg_in_heap_at(T new_value, oop base, ptrdiff_t offset) { |
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200 |
base = ShenandoahBarrierSet::barrier_set()->write_barrier(base); |
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201 |
return Raw::atomic_xchg_at(new_value, base, offset); |
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202 |
} |
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203 |
|
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204 |
template <typename T> |
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205 |
static void arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw, |
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206 |
arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw, |
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207 |
size_t length); |
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208 |
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// Heap oop accesses. These accessors get resolved when |
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// IN_HEAP is set (e.g. when using the HeapAccess API), it is |
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// an oop_* overload, and the barrier strength is AS_NORMAL. |
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template <typename T> |
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static oop oop_load_in_heap(T* addr) { |
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// ShouldNotReachHere(); |
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oop value = Raw::template oop_load<oop>(addr); |
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keep_alive_if_weak(decorators, value); |
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return value; |
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} |
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|
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static oop oop_load_in_heap_at(oop base, ptrdiff_t offset) { |
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base = ShenandoahBarrierSet::resolve_forwarded(base); |
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oop value = Raw::template oop_load_at<oop>(base, offset); |
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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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|
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template <typename T> |
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static void oop_store_in_heap(T* addr, oop 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(addr, value); |
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} |
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|
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static void oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) { |
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base = ShenandoahBarrierSet::barrier_set()->write_barrier(base); |
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value = ShenandoahBarrierSet::barrier_set()->storeval_barrier(value); |
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|
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oop_store_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), value); |
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} |
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|
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template <typename T> |
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static oop oop_atomic_cmpxchg_in_heap(oop new_value, T* addr, oop compare_value); |
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|
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static oop oop_atomic_cmpxchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset, oop compare_value) { |
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base = ShenandoahBarrierSet::barrier_set()->write_barrier(base); |
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new_value = ShenandoahBarrierSet::barrier_set()->storeval_barrier(new_value); |
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return oop_atomic_cmpxchg_in_heap(new_value, AccessInternal::oop_field_addr<decorators>(base, offset), compare_value); |
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} |
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|
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template <typename T> |
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static oop oop_atomic_xchg_in_heap(oop new_value, T* addr); |
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|
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static oop oop_atomic_xchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset) { |
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base = ShenandoahBarrierSet::barrier_set()->write_barrier(base); |
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new_value = ShenandoahBarrierSet::barrier_set()->storeval_barrier(new_value); |
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return oop_atomic_xchg_in_heap(new_value, AccessInternal::oop_field_addr<decorators>(base, offset)); |
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} |
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|
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template <typename T> |
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static bool oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw, |
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arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw, |
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size_t length); |
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|
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// Clone barrier support |
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static void clone_in_heap(oop src, oop dst, size_t size); |
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|
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// Needed for loads on non-heap weak references |
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template <typename T> |
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static oop oop_load_not_in_heap(T* addr) { |
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oop value = Raw::oop_load_not_in_heap(addr); |
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keep_alive_if_weak(decorators, value); |
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return value; |
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} |
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|
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static oop resolve(oop obj) { |
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return ShenandoahBarrierSet::barrier_set()->write_barrier(obj); |
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} |
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|
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static bool equals(oop o1, oop o2) { |
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return ShenandoahBarrierSet::barrier_set()->obj_equals(o1, o2); |
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} |
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|
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}; |
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|
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}; |
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|
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template<> |
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struct BarrierSet::GetName<ShenandoahBarrierSet> { |
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static const BarrierSet::Name value = BarrierSet::ShenandoahBarrierSet; |
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}; |
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|
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template<> |
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struct BarrierSet::GetType<BarrierSet::ShenandoahBarrierSet> { |
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typedef ::ShenandoahBarrierSet type; |
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}; |
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#endif // SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP |