| /* |
| * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * 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_VM_RUNTIME_ACCESS_INLINE_HPP |
| #define SHARE_VM_RUNTIME_ACCESS_INLINE_HPP |
| |
| #include "gc/shared/barrierSet.inline.hpp" |
| #include "metaprogramming/conditional.hpp" |
| #include "metaprogramming/isFloatingPoint.hpp" |
| #include "metaprogramming/isIntegral.hpp" |
| #include "metaprogramming/isPointer.hpp" |
| #include "metaprogramming/isVolatile.hpp" |
| #include "oops/access.hpp" |
| #include "oops/accessBackend.inline.hpp" |
| #include "runtime/atomic.hpp" |
| #include "runtime/orderAccess.inline.hpp" |
| |
| // This file outlines the template pipeline of accesses going through the Access |
| // API. There are essentially 5 steps for each access. |
| // * 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. |
| // * Step 5: Post-runtime dispatch. This step now casts previously unknown types such |
| // as the address type of an oop on the heap (is it oop* or narrowOop*) to |
| // the appropriate type. It also splits sufficiently orthogonal accesses into |
| // different functions, such as whether the access involves oops or primitives |
| // and whether the access is performed on the heap or outside. Then the |
| // appropriate BarrierSet::AccessBarrier is called to perform the access. |
| |
| namespace AccessInternal { |
| |
| // Step 5: Post-runtime dispatch. |
| // This class is the last step before calling the BarrierSet::AccessBarrier. |
| // Here we make sure to figure out types that were not known prior to the |
| // runtime dispatch, such as whether an oop on the heap is oop or narrowOop. |
| // We also split orthogonal barriers such as handling primitives vs oops |
| // and on-heap vs off-heap into different calls to the barrier set. |
| template <class GCBarrierType, BarrierType type, DecoratorSet decorators> |
| struct PostRuntimeDispatch: public AllStatic { }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_STORE, decorators>: public AllStatic { |
| template <typename T> |
| static void access_barrier(void* addr, T value) { |
| GCBarrierType::store_in_heap(reinterpret_cast<T*>(addr), value); |
| } |
| |
| static void oop_access_barrier(void* addr, oop value) { |
| typedef typename HeapOopType<decorators>::type OopType; |
| if (HasDecorator<decorators, IN_HEAP>::value) { |
| GCBarrierType::oop_store_in_heap(reinterpret_cast<OopType*>(addr), value); |
| } else { |
| GCBarrierType::oop_store_not_in_heap(reinterpret_cast<OopType*>(addr), value); |
| } |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_LOAD, decorators>: public AllStatic { |
| template <typename T> |
| static T access_barrier(void* addr) { |
| return GCBarrierType::load_in_heap(reinterpret_cast<T*>(addr)); |
| } |
| |
| static oop oop_access_barrier(void* addr) { |
| typedef typename HeapOopType<decorators>::type OopType; |
| if (HasDecorator<decorators, IN_HEAP>::value) { |
| return GCBarrierType::oop_load_in_heap(reinterpret_cast<OopType*>(addr)); |
| } else { |
| return GCBarrierType::oop_load_not_in_heap(reinterpret_cast<OopType*>(addr)); |
| } |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_ATOMIC_XCHG, decorators>: public AllStatic { |
| template <typename T> |
| static T access_barrier(T new_value, void* addr) { |
| return GCBarrierType::atomic_xchg_in_heap(new_value, reinterpret_cast<T*>(addr)); |
| } |
| |
| static oop oop_access_barrier(oop new_value, void* addr) { |
| typedef typename HeapOopType<decorators>::type OopType; |
| if (HasDecorator<decorators, IN_HEAP>::value) { |
| return GCBarrierType::oop_atomic_xchg_in_heap(new_value, reinterpret_cast<OopType*>(addr)); |
| } else { |
| return GCBarrierType::oop_atomic_xchg_not_in_heap(new_value, reinterpret_cast<OopType*>(addr)); |
| } |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_ATOMIC_CMPXCHG, decorators>: public AllStatic { |
| template <typename T> |
| static T access_barrier(T new_value, void* addr, T compare_value) { |
| return GCBarrierType::atomic_cmpxchg_in_heap(new_value, reinterpret_cast<T*>(addr), compare_value); |
| } |
| |
| static oop oop_access_barrier(oop new_value, void* addr, oop compare_value) { |
| typedef typename HeapOopType<decorators>::type OopType; |
| if (HasDecorator<decorators, IN_HEAP>::value) { |
| return GCBarrierType::oop_atomic_cmpxchg_in_heap(new_value, reinterpret_cast<OopType*>(addr), compare_value); |
| } else { |
| return GCBarrierType::oop_atomic_cmpxchg_not_in_heap(new_value, reinterpret_cast<OopType*>(addr), compare_value); |
| } |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_ARRAYCOPY, decorators>: public AllStatic { |
| template <typename T> |
| static bool access_barrier(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) { |
| return GCBarrierType::arraycopy_in_heap(src_obj, dst_obj, src, dst, length); |
| } |
| |
| template <typename T> |
| static bool oop_access_barrier(arrayOop src_obj, arrayOop dst_obj, T* src, T* dst, size_t length) { |
| typedef typename HeapOopType<decorators>::type OopType; |
| return GCBarrierType::oop_arraycopy_in_heap(src_obj, dst_obj, |
| reinterpret_cast<OopType*>(src), |
| reinterpret_cast<OopType*>(dst), length); |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_STORE_AT, decorators>: public AllStatic { |
| template <typename T> |
| static void access_barrier(oop base, ptrdiff_t offset, T value) { |
| GCBarrierType::store_in_heap_at(base, offset, value); |
| } |
| |
| static void oop_access_barrier(oop base, ptrdiff_t offset, oop value) { |
| GCBarrierType::oop_store_in_heap_at(base, offset, value); |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_LOAD_AT, decorators>: public AllStatic { |
| template <typename T> |
| static T access_barrier(oop base, ptrdiff_t offset) { |
| return GCBarrierType::template load_in_heap_at<T>(base, offset); |
| } |
| |
| static oop oop_access_barrier(oop base, ptrdiff_t offset) { |
| return GCBarrierType::oop_load_in_heap_at(base, offset); |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_ATOMIC_XCHG_AT, decorators>: public AllStatic { |
| template <typename T> |
| static T access_barrier(T new_value, oop base, ptrdiff_t offset) { |
| return GCBarrierType::atomic_xchg_in_heap_at(new_value, base, offset); |
| } |
| |
| static oop oop_access_barrier(oop new_value, oop base, ptrdiff_t offset) { |
| return GCBarrierType::oop_atomic_xchg_in_heap_at(new_value, base, offset); |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_ATOMIC_CMPXCHG_AT, decorators>: public AllStatic { |
| template <typename T> |
| static T access_barrier(T new_value, oop base, ptrdiff_t offset, T compare_value) { |
| return GCBarrierType::atomic_cmpxchg_in_heap_at(new_value, base, offset, compare_value); |
| } |
| |
| static oop oop_access_barrier(oop new_value, oop base, ptrdiff_t offset, oop compare_value) { |
| return GCBarrierType::oop_atomic_cmpxchg_in_heap_at(new_value, base, offset, compare_value); |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_CLONE, decorators>: public AllStatic { |
| static void access_barrier(oop src, oop dst, size_t size) { |
| GCBarrierType::clone_in_heap(src, dst, size); |
| } |
| }; |
| |
| template <class GCBarrierType, DecoratorSet decorators> |
| struct PostRuntimeDispatch<GCBarrierType, BARRIER_RESOLVE, decorators>: public AllStatic { |
| static oop access_barrier(oop obj) { |
| return GCBarrierType::resolve(obj); |
| } |
| }; |
| |
| // Resolving accessors with barriers from the barrier set happens in two steps. |
| // 1. Expand paths with runtime-decorators, e.g. is UseCompressedOops on or off. |
| // 2. Expand paths for each BarrierSet available in the system. |
| template <DecoratorSet decorators, typename FunctionPointerT, BarrierType barrier_type> |
| struct BarrierResolver: public AllStatic { |
| template <DecoratorSet ds> |
| static typename EnableIf< |
| HasDecorator<ds, INTERNAL_VALUE_IS_OOP>::value, |
| FunctionPointerT>::type |
| resolve_barrier_gc() { |
| BarrierSet* bs = BarrierSet::barrier_set(); |
| assert(bs != NULL, "GC barriers invoked before BarrierSet is set"); |
| switch (bs->kind()) { |
| #define BARRIER_SET_RESOLVE_BARRIER_CLOSURE(bs_name) \ |
| case BarrierSet::bs_name: { \ |
| return PostRuntimeDispatch<typename BarrierSet::GetType<BarrierSet::bs_name>::type:: \ |
| AccessBarrier<ds>, barrier_type, ds>::oop_access_barrier; \ |
| } \ |
| break; |
| FOR_EACH_CONCRETE_BARRIER_SET_DO(BARRIER_SET_RESOLVE_BARRIER_CLOSURE) |
| #undef BARRIER_SET_RESOLVE_BARRIER_CLOSURE |
| |
| default: |
| fatal("BarrierSet AccessBarrier resolving not implemented"); |
| return NULL; |
| }; |
| } |
| |
| template <DecoratorSet ds> |
| static typename EnableIf< |
| !HasDecorator<ds, INTERNAL_VALUE_IS_OOP>::value, |
| FunctionPointerT>::type |
| resolve_barrier_gc() { |
| BarrierSet* bs = BarrierSet::barrier_set(); |
| assert(bs != NULL, "GC barriers invoked before BarrierSet is set"); |
| switch (bs->kind()) { |
| #define BARRIER_SET_RESOLVE_BARRIER_CLOSURE(bs_name) \ |
| case BarrierSet::bs_name: { \ |
| return PostRuntimeDispatch<typename BarrierSet::GetType<BarrierSet::bs_name>::type:: \ |
| AccessBarrier<ds>, barrier_type, ds>::access_barrier; \ |
| } \ |
| break; |
| FOR_EACH_CONCRETE_BARRIER_SET_DO(BARRIER_SET_RESOLVE_BARRIER_CLOSURE) |
| #undef BARRIER_SET_RESOLVE_BARRIER_CLOSURE |
| |
| default: |
| fatal("BarrierSet AccessBarrier resolving not implemented"); |
| return NULL; |
| }; |
| } |
| |
| static FunctionPointerT resolve_barrier_rt() { |
| if (UseCompressedOops) { |
| const DecoratorSet expanded_decorators = decorators | INTERNAL_RT_USE_COMPRESSED_OOPS; |
| return resolve_barrier_gc<expanded_decorators>(); |
| } else { |
| return resolve_barrier_gc<decorators>(); |
| } |
| } |
| |
| static FunctionPointerT resolve_barrier() { |
| return resolve_barrier_rt(); |
| } |
| }; |
| |
| // 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_STORE>::resolve_barrier(); |
| _store_func = function; |
| function(addr, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_STORE_AT>::resolve_barrier(); |
| _store_at_func = function; |
| function(base, offset, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_LOAD>::resolve_barrier(); |
| _load_func = function; |
| return function(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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_LOAD_AT>::resolve_barrier(); |
| _load_at_func = function; |
| return function(base, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_ATOMIC_CMPXCHG>::resolve_barrier(); |
| _atomic_cmpxchg_func = function; |
| return function(new_value, addr, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_ATOMIC_CMPXCHG_AT>::resolve_barrier(); |
| _atomic_cmpxchg_at_func = function; |
| return function(new_value, base, offset, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_ATOMIC_XCHG>::resolve_barrier(); |
| _atomic_xchg_func = function; |
| return function(new_value, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_ATOMIC_XCHG_AT>::resolve_barrier(); |
| _atomic_xchg_at_func = function; |
| return function(new_value, base, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_ARRAYCOPY>::resolve_barrier(); |
| _arraycopy_func = function; |
| return function(src_obj, dst_obj, src, dst, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_CLONE>::resolve_barrier(); |
| _clone_func = function; |
| function(src, dst, 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) { |
| func_t function = BarrierResolver<decorators, func_t, BARRIER_RESOLVE>::resolve_barrier(); |
| _resolve_func = function; |
| return function(obj); |
| } |
| |
| static inline oop resolve(oop obj) { |
| return _resolve_func(obj); |
| } |
| }; |
| |
| // 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; |
| |
| // 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) { |
| typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw; |
| 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, bool>::type |
| arraycopy(arrayOop src_obj, arrayOop dst_obj, T *src, T* dst, size_t length) { |
| typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw; |
| return Raw::arraycopy(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) { |
| typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw; |
| 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); |
| } |
| }; |
| |
| // 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); |
| } |
| |
| // 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) { |
| verify_types<decorators, T>(); |
| typedef typename Decay<T>::type DecayedT; |
| const DecoratorSet expanded_decorators = DecoratorFixup<decorators | IN_HEAP_ARRAY | IN_HEAP | |
| (HasDecorator<decorators, INTERNAL_VALUE_IS_OOP>::value ? |
| INTERNAL_CONVERT_COMPRESSED_OOP : INTERNAL_EMPTY)>::value; |
| return PreRuntimeDispatch::arraycopy<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> |
| template <DecoratorSet expected_decorators> |
| void Access<decorators>::verify_decorators() { |
| STATIC_ASSERT((~expected_decorators & decorators) == 0); // unexpected decorator used |
| const DecoratorSet barrier_strength_decorators = decorators & AS_DECORATOR_MASK; |
| STATIC_ASSERT(barrier_strength_decorators == 0 || ( // make sure barrier strength decorators are disjoint if set |
| (barrier_strength_decorators ^ AS_NO_KEEPALIVE) == 0 || |
| (barrier_strength_decorators ^ AS_DEST_NOT_INITIALIZED) == 0 || |
| (barrier_strength_decorators ^ AS_RAW) == 0 || |
| (barrier_strength_decorators ^ AS_NORMAL) == 0 |
| )); |
| const DecoratorSet ref_strength_decorators = decorators & ON_DECORATOR_MASK; |
| STATIC_ASSERT(ref_strength_decorators == 0 || ( // make sure ref strength decorators are disjoint if set |
| (ref_strength_decorators ^ ON_STRONG_OOP_REF) == 0 || |
| (ref_strength_decorators ^ ON_WEAK_OOP_REF) == 0 || |
| (ref_strength_decorators ^ ON_PHANTOM_OOP_REF) == 0 || |
| (ref_strength_decorators ^ ON_UNKNOWN_OOP_REF) == 0 |
| )); |
| const DecoratorSet memory_ordering_decorators = decorators & MO_DECORATOR_MASK; |
| STATIC_ASSERT(memory_ordering_decorators == 0 || ( // make sure memory ordering decorators are disjoint if set |
| (memory_ordering_decorators ^ MO_UNORDERED) == 0 || |
| (memory_ordering_decorators ^ MO_VOLATILE) == 0 || |
| (memory_ordering_decorators ^ MO_RELAXED) == 0 || |
| (memory_ordering_decorators ^ MO_ACQUIRE) == 0 || |
| (memory_ordering_decorators ^ MO_RELEASE) == 0 || |
| (memory_ordering_decorators ^ MO_SEQ_CST) == 0 |
| )); |
| const DecoratorSet location_decorators = decorators & IN_DECORATOR_MASK; |
| STATIC_ASSERT(location_decorators == 0 || ( // make sure location decorators are disjoint if set |
| (location_decorators ^ IN_ROOT) == 0 || |
| (location_decorators ^ IN_HEAP) == 0 || |
| (location_decorators ^ (IN_HEAP | IN_HEAP_ARRAY)) == 0 || |
| (location_decorators ^ (IN_ROOT | IN_CONCURRENT_ROOT)) == 0 || |
| (location_decorators ^ (IN_ROOT | IN_ARCHIVE_ROOT)) == 0 |
| )); |
| } |
| |
| #endif // SHARE_VM_RUNTIME_ACCESS_INLINE_HPP |
