< prev index next > src/hotspot/share/oops/accessBackend.hpp
erik_version
roman_version
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
-#ifndef SHARE_VM_RUNTIME_ACCESSBACKEND_HPP
-#define SHARE_VM_RUNTIME_ACCESSBACKEND_HPP
+#ifndef SHARE_OOPS_ACCESSBACKEND_HPP
+#define SHARE_OOPS_ACCESSBACKEND_HPP
+#include "gc/shared/barrierSetConfig.hpp"
+#include "memory/allocation.hpp"
#include "metaprogramming/conditional.hpp"
+#include "metaprogramming/decay.hpp"
#include "metaprogramming/enableIf.hpp"
#include "metaprogramming/integralConstant.hpp"
+#include "metaprogramming/isFloatingPoint.hpp"
+#include "metaprogramming/isIntegral.hpp"
+#include "metaprogramming/isPointer.hpp"
#include "metaprogramming/isSame.hpp"
+#include "metaprogramming/isVolatile.hpp"
+#include "oops/accessDecorators.hpp"
+#include "oops/oopsHierarchy.hpp"
#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
+
// This metafunction returns either oop or narrowOop depending on whether
// an access needs to use compressed oops or not.
template <DecoratorSet decorators>
struct HeapOopType: AllStatic {
static const bool needs_oop_compress = HasDecorator<decorators, INTERNAL_CONVERT_COMPRESSED_OOP>::value &&
BARRIER_ATOMIC_CMPXCHG_AT,
BARRIER_ATOMIC_XCHG,
BARRIER_ATOMIC_XCHG_AT,
BARRIER_ARRAYCOPY,
BARRIER_CLONE,
- BARRIER_RESOLVE
+ BARRIER_RESOLVE,
+ BARRIER_EQUALS
};
template <DecoratorSet decorators, typename T>
struct MustConvertCompressedOop: public IntegralConstant<bool,
HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value &&
typedef T (*atomic_xchg_func_t)(T new_value, void* addr);
typedef bool (*arraycopy_func_t)(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length);
typedef void (*clone_func_t)(oop src, oop dst, size_t size);
typedef oop (*resolve_func_t)(oop obj);
+ typedef bool (*equals_func_t)(oop o1, oop o2);
};
template <DecoratorSet decorators>
struct AccessFunctionTypes<decorators, void> {
typedef bool (*arraycopy_func_t)(arrayOop src_obj, arrayOop dst_obj, void* src, void* dst, size_t length);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ATOMIC_XCHG, atomic_xchg_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ATOMIC_XCHG_AT, atomic_xchg_at_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ARRAYCOPY, arraycopy_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_CLONE, clone_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_RESOLVE, resolve_func_t);
+ ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_EQUALS, equals_func_t);
#undef ACCESS_GENERATE_ACCESS_FUNCTION
template <DecoratorSet decorators, typename T, BarrierType barrier_type>
typename AccessFunction<decorators, T, barrier_type>::type resolve_barrier();
static bool oop_arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length);
static void clone(oop src, oop dst, size_t size);
static oop resolve(oop obj) { return obj; }
+
+ static bool equals(oop o1, oop o2) { return o1 == o2; }
};
-#endif // SHARE_VM_RUNTIME_ACCESSBACKEND_HPP
+// Below is the implementation of the first 4 steps of the template pipeline:
+// * Step 1: Set default decorators and decay types. This step gets rid of CV qualifiers
+// and sets default decorators to sensible values.
+// * Step 2: Reduce types. This step makes sure there is only a single T type and not
+// multiple types. The P type of the address and T type of the value must
+// match.
+// * Step 3: Pre-runtime dispatch. This step checks whether a runtime call can be
+// avoided, and in that case avoids it (calling raw accesses or
+// primitive accesses in a build that does not require primitive GC barriers)
+// * Step 4: Runtime-dispatch. This step performs a runtime dispatch to the corresponding
+// BarrierSet::AccessBarrier accessor that attaches GC-required barriers
+// to the access.
+
+namespace AccessInternal {
+ template <typename T>
+ struct OopOrNarrowOopInternal: AllStatic {
+ typedef oop type;
+ };
+
+ template <>
+ struct OopOrNarrowOopInternal<narrowOop>: AllStatic {
+ typedef narrowOop type;
+ };
+
+ // This metafunction returns a canonicalized oop/narrowOop type for a passed
+ // in oop-like types passed in from oop_* overloads where the user has sworn
+ // that the passed in values should be oop-like (e.g. oop, oopDesc*, arrayOop,
+ // narrowOoop, instanceOopDesc*, and random other things).
+ // In the oop_* overloads, it must hold that if the passed in type T is not
+ // narrowOop, then it by contract has to be one of many oop-like types implicitly
+ // convertible to oop, and hence returns oop as the canonical oop type.
+ // If it turns out it was not, then the implicit conversion to oop will fail
+ // to compile, as desired.
+ template <typename T>
+ struct OopOrNarrowOop: AllStatic {
+ typedef typename OopOrNarrowOopInternal<typename Decay<T>::type>::type type;
+ };
+
+ inline void* field_addr(oop base, ptrdiff_t byte_offset) {
+ return reinterpret_cast<void*>(reinterpret_cast<intptr_t>((void*)base) + byte_offset);
+ }
+ // Step 4: Runtime dispatch
+ // The RuntimeDispatch class is responsible for performing a runtime dispatch of the
+ // accessor. This is required when the access either depends on whether compressed oops
+ // is being used, or it depends on which GC implementation was chosen (e.g. requires GC
+ // barriers). The way it works is that a function pointer initially pointing to an
+ // accessor resolution function gets called for each access. Upon first invocation,
+ // it resolves which accessor to be used in future invocations and patches the
+ // function pointer to this new accessor.
+
+ template <DecoratorSet decorators, typename T, BarrierType type>
+ struct RuntimeDispatch: AllStatic {};
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_STORE>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_STORE>::type func_t;
+ static func_t _store_func;
+
+ static void store_init(void* addr, T value);
+
+ static inline void store(void* addr, T value) {
+ _store_func(addr, value);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_STORE_AT>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_STORE_AT>::type func_t;
+ static func_t _store_at_func;
+
+ static void store_at_init(oop base, ptrdiff_t offset, T value);
+
+ static inline void store_at(oop base, ptrdiff_t offset, T value) {
+ _store_at_func(base, offset, value);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_LOAD>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_LOAD>::type func_t;
+ static func_t _load_func;
+
+ static T load_init(void* addr);
+
+ static inline T load(void* addr) {
+ return _load_func(addr);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_LOAD_AT>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_LOAD_AT>::type func_t;
+ static func_t _load_at_func;
+
+ static T load_at_init(oop base, ptrdiff_t offset);
+
+ static inline T load_at(oop base, ptrdiff_t offset) {
+ return _load_at_func(base, offset);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG>::type func_t;
+ static func_t _atomic_cmpxchg_func;
+
+ static T atomic_cmpxchg_init(T new_value, void* addr, T compare_value);
+
+ static inline T atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+ return _atomic_cmpxchg_func(new_value, addr, compare_value);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::type func_t;
+ static func_t _atomic_cmpxchg_at_func;
+
+ static T atomic_cmpxchg_at_init(T new_value, oop base, ptrdiff_t offset, T compare_value);
+
+ static inline T atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+ return _atomic_cmpxchg_at_func(new_value, base, offset, compare_value);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG>::type func_t;
+ static func_t _atomic_xchg_func;
+
+ static T atomic_xchg_init(T new_value, void* addr);
+
+ static inline T atomic_xchg(T new_value, void* addr) {
+ return _atomic_xchg_func(new_value, addr);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG_AT>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG_AT>::type func_t;
+ static func_t _atomic_xchg_at_func;
+
+ static T atomic_xchg_at_init(T new_value, oop base, ptrdiff_t offset);
+
+ static inline T atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+ return _atomic_xchg_at_func(new_value, base, offset);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_ARRAYCOPY>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_ARRAYCOPY>::type func_t;
+ static func_t _arraycopy_func;
+
+ static bool arraycopy_init(arrayOop src_obj, arrayOop dst_obj, T *src, T* dst, size_t length);
+
+ static inline bool arraycopy(arrayOop src_obj, arrayOop dst_obj, T *src, T* dst, size_t length) {
+ return _arraycopy_func(src_obj, dst_obj, src, dst, length);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_CLONE>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_CLONE>::type func_t;
+ static func_t _clone_func;
+
+ static void clone_init(oop src, oop dst, size_t size);
+
+ static inline void clone(oop src, oop dst, size_t size) {
+ _clone_func(src, dst, size);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_RESOLVE>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_RESOLVE>::type func_t;
+ static func_t _resolve_func;
+
+ static oop resolve_init(oop obj);
+
+ static inline oop resolve(oop obj) {
+ return _resolve_func(obj);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_EQUALS>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_EQUALS>::type func_t;
+ static func_t _equals_func;
+
+ static bool equals_init(oop o1, oop o2);
+
+ static inline bool equals(oop o1, oop o2) {
+ return _equals_func(o1, o2);
+ }
+ };
+
+ // Initialize the function pointers to point to the resolving function.
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_STORE>::type
+ RuntimeDispatch<decorators, T, BARRIER_STORE>::_store_func = &store_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_STORE_AT>::type
+ RuntimeDispatch<decorators, T, BARRIER_STORE_AT>::_store_at_func = &store_at_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_LOAD>::type
+ RuntimeDispatch<decorators, T, BARRIER_LOAD>::_load_func = &load_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_LOAD_AT>::type
+ RuntimeDispatch<decorators, T, BARRIER_LOAD_AT>::_load_at_func = &load_at_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG>::type
+ RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG>::_atomic_cmpxchg_func = &atomic_cmpxchg_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::type
+ RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::_atomic_cmpxchg_at_func = &atomic_cmpxchg_at_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG>::type
+ RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG>::_atomic_xchg_func = &atomic_xchg_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_ATOMIC_XCHG_AT>::type
+ RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG_AT>::_atomic_xchg_at_func = &atomic_xchg_at_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_ARRAYCOPY>::type
+ RuntimeDispatch<decorators, T, BARRIER_ARRAYCOPY>::_arraycopy_func = &arraycopy_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_CLONE>::type
+ RuntimeDispatch<decorators, T, BARRIER_CLONE>::_clone_func = &clone_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_RESOLVE>::type
+ RuntimeDispatch<decorators, T, BARRIER_RESOLVE>::_resolve_func = &resolve_init;
+
+ template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_EQUALS>::type
+ RuntimeDispatch<decorators, T, BARRIER_EQUALS>::_equals_func = &equals_init;
+
+ // Step 3: Pre-runtime dispatching.
+ // The PreRuntimeDispatch class is responsible for filtering the barrier strength
+ // decorators. That is, for AS_RAW, it hardwires the accesses without a runtime
+ // dispatch point. Otherwise it goes through a runtime check if hardwiring was
+ // not possible.
+ struct PreRuntimeDispatch: AllStatic {
+ template<DecoratorSet decorators>
+ struct CanHardwireRaw: public IntegralConstant<
+ bool,
+ !HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value || // primitive access
+ !HasDecorator<decorators, INTERNAL_CONVERT_COMPRESSED_OOP>::value || // don't care about compressed oops (oop* address)
+ HasDecorator<decorators, INTERNAL_RT_USE_COMPRESSED_OOPS>::value> // we can infer we use compressed oops (narrowOop* address)
+ {};
+
+ static const DecoratorSet convert_compressed_oops = INTERNAL_RT_USE_COMPRESSED_OOPS | INTERNAL_CONVERT_COMPRESSED_OOP;
+
+ template<DecoratorSet decorators>
+ static bool is_hardwired_primitive() {
+ return !HasDecorator<decorators, INTERNAL_BT_BARRIER_ON_PRIMITIVES>::value &&
+ !HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value;
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value>::type
+ store(void* addr, T value) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+ Raw::oop_store(addr, value);
+ } else {
+ Raw::store(addr, value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value>::type
+ store(void* addr, T value) {
+ if (UseCompressedOops) {
+ const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+ PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+ } else {
+ const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+ PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value>::type
+ store(void* addr, T value) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+ } else {
+ RuntimeDispatch<decorators, T, BARRIER_STORE>::store(addr, value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value>::type
+ store_at(oop base, ptrdiff_t offset, T value) {
+ store<decorators>(field_addr(base, offset), value);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value>::type
+ store_at(oop base, ptrdiff_t offset, T value) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ PreRuntimeDispatch::store_at<expanded_decorators>(base, offset, value);
+ } else {
+ RuntimeDispatch<decorators, T, BARRIER_STORE_AT>::store_at(base, offset, value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, T>::type
+ load(void* addr) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+ return Raw::template oop_load<T>(addr);
+ } else {
+ return Raw::template load<T>(addr);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, T>::type
+ load(void* addr) {
+ if (UseCompressedOops) {
+ const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+ return PreRuntimeDispatch::load<expanded_decorators, T>(addr);
+ } else {
+ const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+ return PreRuntimeDispatch::load<expanded_decorators, T>(addr);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, T>::type
+ load(void* addr) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::load<expanded_decorators, T>(addr);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_LOAD>::load(addr);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value, T>::type
+ load_at(oop base, ptrdiff_t offset) {
+ return load<decorators, T>(field_addr(base, offset));
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, T>::type
+ load_at(oop base, ptrdiff_t offset) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::load_at<expanded_decorators, T>(base, offset);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_LOAD_AT>::load_at(base, offset);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, T>::type
+ atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+ return Raw::oop_atomic_cmpxchg(new_value, addr, compare_value);
+ } else {
+ return Raw::atomic_cmpxchg(new_value, addr, compare_value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, T>::type
+ atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+ if (UseCompressedOops) {
+ const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+ return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+ } else {
+ const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+ return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, T>::type
+ atomic_cmpxchg(T new_value, void* addr, T compare_value) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG>::atomic_cmpxchg(new_value, addr, compare_value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value, T>::type
+ atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+ return atomic_cmpxchg<decorators>(new_value, field_addr(base, offset), compare_value);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, T>::type
+ atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::atomic_cmpxchg_at<expanded_decorators>(new_value, base, offset, compare_value);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_CMPXCHG_AT>::atomic_cmpxchg_at(new_value, base, offset, compare_value);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, T>::type
+ atomic_xchg(T new_value, void* addr) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+ return Raw::oop_atomic_xchg(new_value, addr);
+ } else {
+ return Raw::atomic_xchg(new_value, addr);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, T>::type
+ atomic_xchg(T new_value, void* addr) {
+ if (UseCompressedOops) {
+ const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ } else {
+ const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, T>::type
+ atomic_xchg(T new_value, void* addr) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG>::atomic_xchg(new_value, addr);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value, T>::type
+ atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+ return atomic_xchg<decorators>(new_value, field_addr(base, offset));
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, T>::type
+ atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, base, offset);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_ATOMIC_XCHG_AT>::atomic_xchg_at(new_value, base, offset);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && CanHardwireRaw<decorators>::value, bool>::type
+ arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ if (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value) {
+ return Raw::oop_arraycopy(src_obj, dst_obj, src, dst, length);
+ } else {
+ return Raw::arraycopy(src_obj, dst_obj, src, dst, length);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value && !CanHardwireRaw<decorators>::value, bool>::type
+ arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+ if (UseCompressedOops) {
+ const DecoratorSet expanded_decorators = decorators | convert_compressed_oops;
+ return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+ } else {
+ const DecoratorSet expanded_decorators = decorators & ~convert_compressed_oops;
+ return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+ }
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value, bool>::type
+ arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+ if (is_hardwired_primitive<decorators>()) {
+ const DecoratorSet expanded_decorators = decorators | AS_RAW;
+ return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+ } else {
+ return RuntimeDispatch<decorators, T, BARRIER_ARRAYCOPY>::arraycopy(src_obj, dst_obj, src, dst, length);
+ }
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value>::type
+ clone(oop src, oop dst, size_t size) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ Raw::clone(src, dst, size);
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value>::type
+ clone(oop src, oop dst, size_t size) {
+ RuntimeDispatch<decorators, oop, BARRIER_CLONE>::clone(src, dst, size);
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, oop>::type
+ resolve(oop obj) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ return Raw::resolve(obj);
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, oop>::type
+ resolve(oop obj) {
+ return RuntimeDispatch<decorators, oop, BARRIER_RESOLVE>::resolve(obj);
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, bool>::type
+ equals(oop o1, oop o2) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ return Raw::equals(o1, o2);
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, bool>::type
+ equals(oop o1, oop o2) {
+ return RuntimeDispatch<decorators, oop, BARRIER_EQUALS>::equals(o1, o2);
+ }
+ };
+
+ // This class adds implied decorators that follow according to decorator rules.
+ // For example adding default reference strength and default memory ordering
+ // semantics.
+ template <DecoratorSet input_decorators>
+ struct DecoratorFixup: AllStatic {
+ // If no reference strength has been picked, then strong will be picked
+ static const DecoratorSet ref_strength_default = input_decorators |
+ (((ON_DECORATOR_MASK & input_decorators) == 0 && (INTERNAL_VALUE_IS_OOP & input_decorators) != 0) ?
+ ON_STRONG_OOP_REF : INTERNAL_EMPTY);
+ // If no memory ordering has been picked, unordered will be picked
+ static const DecoratorSet memory_ordering_default = ref_strength_default |
+ ((MO_DECORATOR_MASK & ref_strength_default) == 0 ? MO_UNORDERED : INTERNAL_EMPTY);
+ // If no barrier strength has been picked, normal will be used
+ static const DecoratorSet barrier_strength_default = memory_ordering_default |
+ ((AS_DECORATOR_MASK & memory_ordering_default) == 0 ? AS_NORMAL : INTERNAL_EMPTY);
+ // Heap array accesses imply it is a heap access
+ static const DecoratorSet heap_array_is_in_heap = barrier_strength_default |
+ ((IN_HEAP_ARRAY & barrier_strength_default) != 0 ? IN_HEAP : INTERNAL_EMPTY);
+ static const DecoratorSet conc_root_is_root = heap_array_is_in_heap |
+ ((IN_CONCURRENT_ROOT & heap_array_is_in_heap) != 0 ? IN_ROOT : INTERNAL_EMPTY);
+ static const DecoratorSet archive_root_is_root = conc_root_is_root |
+ ((IN_ARCHIVE_ROOT & conc_root_is_root) != 0 ? IN_ROOT : INTERNAL_EMPTY);
+ static const DecoratorSet value = archive_root_is_root | BT_BUILDTIME_DECORATORS;
+ };
+
+ // Step 2: Reduce types.
+ // Enforce that for non-oop types, T and P have to be strictly the same.
+ // P is the type of the address and T is the type of the values.
+ // As for oop types, it is allow to send T in {narrowOop, oop} and
+ // P in {narrowOop, oop, HeapWord*}. The following rules apply according to
+ // the subsequent table. (columns are P, rows are T)
+ // | | HeapWord | oop | narrowOop |
+ // | oop | rt-comp | hw-none | hw-comp |
+ // | narrowOop | x | x | hw-none |
+ //
+ // x means not allowed
+ // rt-comp means it must be checked at runtime whether the oop is compressed.
+ // hw-none means it is statically known the oop will not be compressed.
+ // hw-comp means it is statically known the oop will be compressed.
+
+ template <DecoratorSet decorators, typename T>
+ inline void store_reduce_types(T* addr, T value) {
+ PreRuntimeDispatch::store<decorators>(addr, value);
+ }
+
+ template <DecoratorSet decorators>
+ inline void store_reduce_types(narrowOop* addr, oop value) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+ }
+
+ template <DecoratorSet decorators>
+ inline void store_reduce_types(narrowOop* addr, narrowOop value) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+ }
+
+ template <DecoratorSet decorators>
+ inline void store_reduce_types(HeapWord* addr, oop value) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+ PreRuntimeDispatch::store<expanded_decorators>(addr, value);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline T atomic_cmpxchg_reduce_types(T new_value, T* addr, T compare_value) {
+ return PreRuntimeDispatch::atomic_cmpxchg<decorators>(new_value, addr, compare_value);
+ }
+
+ template <DecoratorSet decorators>
+ inline oop atomic_cmpxchg_reduce_types(oop new_value, narrowOop* addr, oop compare_value) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+ }
+
+ template <DecoratorSet decorators>
+ inline narrowOop atomic_cmpxchg_reduce_types(narrowOop new_value, narrowOop* addr, narrowOop compare_value) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+ }
+
+ template <DecoratorSet decorators>
+ inline oop atomic_cmpxchg_reduce_types(oop new_value,
+ HeapWord* addr,
+ oop compare_value) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+ return PreRuntimeDispatch::atomic_cmpxchg<expanded_decorators>(new_value, addr, compare_value);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline T atomic_xchg_reduce_types(T new_value, T* addr) {
+ const DecoratorSet expanded_decorators = decorators;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ }
+
+ template <DecoratorSet decorators>
+ inline oop atomic_xchg_reduce_types(oop new_value, narrowOop* addr) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ }
+
+ template <DecoratorSet decorators>
+ inline narrowOop atomic_xchg_reduce_types(narrowOop new_value, narrowOop* addr) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ }
+
+ template <DecoratorSet decorators>
+ inline oop atomic_xchg_reduce_types(oop new_value, HeapWord* addr) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+ return PreRuntimeDispatch::atomic_xchg<expanded_decorators>(new_value, addr);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline T load_reduce_types(T* addr) {
+ return PreRuntimeDispatch::load<decorators, T>(addr);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline typename OopOrNarrowOop<T>::type load_reduce_types(narrowOop* addr) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ return PreRuntimeDispatch::load<expanded_decorators, typename OopOrNarrowOop<T>::type>(addr);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline oop load_reduce_types(HeapWord* addr) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+ return PreRuntimeDispatch::load<expanded_decorators, oop>(addr);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline bool arraycopy_reduce_types(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+ return PreRuntimeDispatch::arraycopy<decorators>(src_obj, dst_obj, src, dst, length);
+ }
+
+ template <DecoratorSet decorators>
+ inline bool arraycopy_reduce_types(arrayOop src_obj, arrayOop dst_obj, HeapWord* src, HeapWord* dst, size_t length) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP;
+ return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+ }
+
+ template <DecoratorSet decorators>
+ inline bool arraycopy_reduce_types(arrayOop src_obj, arrayOop dst_obj, narrowOop* src, narrowOop* dst, size_t length) {
+ const DecoratorSet expanded_decorators = decorators | INTERNAL_CONVERT_COMPRESSED_OOP |
+ INTERNAL_RT_USE_COMPRESSED_OOPS;
+ return PreRuntimeDispatch::arraycopy<expanded_decorators>(src_obj, dst_obj, src, dst, length);
+ }
+
+ // Step 1: Set default decorators. This step remembers if a type was volatile
+ // and then sets the MO_VOLATILE decorator by default. Otherwise, a default
+ // memory ordering is set for the access, and the implied decorator rules
+ // are applied to select sensible defaults for decorators that have not been
+ // explicitly set. For example, default object referent strength is set to strong.
+ // This step also decays the types passed in (e.g. getting rid of CV qualifiers
+ // and references from the types). This step also perform some type verification
+ // that the passed in types make sense.
+
+ template <DecoratorSet decorators, typename T>
+ static void verify_types(){
+ // If this fails to compile, then you have sent in something that is
+ // not recognized as a valid primitive type to a primitive Access function.
+ STATIC_ASSERT((HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value || // oops have already been validated
+ (IsPointer<T>::value || IsIntegral<T>::value) ||
+ IsFloatingPoint<T>::value)); // not allowed primitive type
+ }
+
+ template <DecoratorSet decorators, typename P, typename T>
+ inline void store(P* addr, T value) {
+ verify_types<decorators, T>();
+ typedef typename Decay<P>::type DecayedP;
+ typedef typename Decay<T>::type DecayedT;
+ DecayedT decayed_value = value;
+ // If a volatile address is passed in but no memory ordering decorator,
+ // set the memory ordering to MO_VOLATILE by default.
+ const DecoratorSet expanded_decorators = DecoratorFixup<
+ (IsVolatile<P>::value && !HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+ (MO_VOLATILE | decorators) : decorators>::value;
+ store_reduce_types<expanded_decorators>(const_cast<DecayedP*>(addr), decayed_value);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline void store_at(oop base, ptrdiff_t offset, T value) {
+ verify_types<decorators, T>();
+ typedef typename Decay<T>::type DecayedT;
+ DecayedT decayed_value = value;
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators |
+ (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+ INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value;
+ PreRuntimeDispatch::store_at<expanded_decorators>(base, offset, decayed_value);
+ }
+
+ template <DecoratorSet decorators, typename P, typename T>
+ inline T load(P* addr) {
+ verify_types<decorators, T>();
+ typedef typename Decay<P>::type DecayedP;
+ typedef typename Conditional<HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value,
+ typename OopOrNarrowOop<T>::type,
+ typename Decay<T>::type>::type DecayedT;
+ // If a volatile address is passed in but no memory ordering decorator,
+ // set the memory ordering to MO_VOLATILE by default.
+ const DecoratorSet expanded_decorators = DecoratorFixup<
+ (IsVolatile<P>::value && !HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+ (MO_VOLATILE | decorators) : decorators>::value;
+ return load_reduce_types<expanded_decorators, DecayedT>(const_cast<DecayedP*>(addr));
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline T load_at(oop base, ptrdiff_t offset) {
+ verify_types<decorators, T>();
+ typedef typename Conditional<HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value,
+ typename OopOrNarrowOop<T>::type,
+ typename Decay<T>::type>::type DecayedT;
+ // Expand the decorators (figure out sensible defaults)
+ // Potentially remember if we need compressed oop awareness
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators |
+ (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+ INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value;
+ return PreRuntimeDispatch::load_at<expanded_decorators, DecayedT>(base, offset);
+ }
+
+ template <DecoratorSet decorators, typename P, typename T>
+ inline T atomic_cmpxchg(T new_value, P* addr, T compare_value) {
+ verify_types<decorators, T>();
+ typedef typename Decay<P>::type DecayedP;
+ typedef typename Decay<T>::type DecayedT;
+ DecayedT new_decayed_value = new_value;
+ DecayedT compare_decayed_value = compare_value;
+ const DecoratorSet expanded_decorators = DecoratorFixup<
+ (!HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+ (MO_SEQ_CST | decorators) : decorators>::value;
+ return atomic_cmpxchg_reduce_types<expanded_decorators>(new_decayed_value,
+ const_cast<DecayedP*>(addr),
+ compare_decayed_value);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline T atomic_cmpxchg_at(T new_value, oop base, ptrdiff_t offset, T compare_value) {
+ verify_types<decorators, T>();
+ typedef typename Decay<T>::type DecayedT;
+ DecayedT new_decayed_value = new_value;
+ DecayedT compare_decayed_value = compare_value;
+ // Determine default memory ordering
+ const DecoratorSet expanded_decorators = DecoratorFixup<
+ (!HasDecorator<decorators, MO_DECORATOR_MASK>::value) ?
+ (MO_SEQ_CST | decorators) : decorators>::value;
+ // Potentially remember that we need compressed oop awareness
+ const DecoratorSet final_decorators = expanded_decorators |
+ (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+ INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY);
+ return PreRuntimeDispatch::atomic_cmpxchg_at<final_decorators>(new_decayed_value, base,
+ offset, compare_decayed_value);
+ }
+
+ template <DecoratorSet decorators, typename P, typename T>
+ inline T atomic_xchg(T new_value, P* addr) {
+ verify_types<decorators, T>();
+ typedef typename Decay<P>::type DecayedP;
+ typedef typename Decay<T>::type DecayedT;
+ DecayedT new_decayed_value = new_value;
+ // atomic_xchg is only available in SEQ_CST flavour.
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators | MO_SEQ_CST>::value;
+ return atomic_xchg_reduce_types<expanded_decorators>(new_decayed_value,
+ const_cast<DecayedP*>(addr));
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline T atomic_xchg_at(T new_value, oop base, ptrdiff_t offset) {
+ verify_types<decorators, T>();
+ typedef typename Decay<T>::type DecayedT;
+ DecayedT new_decayed_value = new_value;
+ // atomic_xchg is only available in SEQ_CST flavour.
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators | MO_SEQ_CST |
+ (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ?
+ INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value;
+ return PreRuntimeDispatch::atomic_xchg_at<expanded_decorators>(new_decayed_value, base, offset);
+ }
+
+ template <DecoratorSet decorators, typename T>
+ inline bool arraycopy(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) {
+ STATIC_ASSERT((HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ||
+ (IsSame<T, void>::value || IsIntegral<T>::value) ||
+ IsFloatingPoint<T>::value)); // arraycopy allows type erased void elements
+ typedef typename Decay<T>::type DecayedT;
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators | IN_HEAP_ARRAY | IN_HEAP>::value;
+ return arraycopy_reduce_types<expanded_decorators>(src_obj, dst_obj,
+ const_cast<DecayedT*>(src),
+ const_cast<DecayedT*>(dst),
+ length);
+ }
+
+ template <DecoratorSet decorators>
+ inline void clone(oop src, oop dst, size_t size) {
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+ PreRuntimeDispatch::clone<expanded_decorators>(src, dst, size);
+ }
+
+ template <DecoratorSet decorators>
+ inline oop resolve(oop obj) {
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+ return PreRuntimeDispatch::resolve<expanded_decorators>(obj);
+ }
+
+ template <DecoratorSet decorators>
+ inline bool equals(oop o1, oop o2) {
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+ return PreRuntimeDispatch::equals<expanded_decorators>(o1, o2);
+ }
+}
+
+#endif // SHARE_OOPS_ACCESSBACKEND_HPP
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