211 lines
8 KiB
C++
211 lines
8 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_MIRROR_ARRAY_H_
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#define ART_RUNTIME_MIRROR_ARRAY_H_
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#include "gc_root.h"
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#include "gc/allocator_type.h"
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#include "object.h"
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#include "object_callbacks.h"
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namespace art {
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template<class T> class Handle;
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namespace mirror {
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class MANAGED Array : public Object {
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public:
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// The size of a java.lang.Class representing an array.
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static uint32_t ClassSize(size_t pointer_size);
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// Allocates an array with the given properties, if kFillUsable is true the array will be of at
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// least component_count size, however, if there's usable space at the end of the allocation the
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// array will fill it.
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template <bool kIsInstrumented, bool kFillUsable = false>
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ALWAYS_INLINE static Array* Alloc(Thread* self, Class* array_class, int32_t component_count,
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size_t component_size_shift, gc::AllocatorType allocator_type)
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SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
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static Array* CreateMultiArray(Thread* self, Handle<Class> element_class,
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Handle<IntArray> dimensions)
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SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
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template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
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ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
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size_t SizeOf() SHARED_REQUIRES(Locks::mutator_lock_);
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template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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ALWAYS_INLINE int32_t GetLength() SHARED_REQUIRES(Locks::mutator_lock_) {
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return GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Array, length_));
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}
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void SetLength(int32_t length) SHARED_REQUIRES(Locks::mutator_lock_) {
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DCHECK_GE(length, 0);
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// We use non transactional version since we can't undo this write. We also disable checking
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// since it would fail during a transaction.
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SetField32<false, false, kVerifyNone>(OFFSET_OF_OBJECT_MEMBER(Array, length_), length);
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}
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static MemberOffset LengthOffset() {
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return OFFSET_OF_OBJECT_MEMBER(Array, length_);
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}
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static MemberOffset DataOffset(size_t component_size);
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void* GetRawData(size_t component_size, int32_t index)
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SHARED_REQUIRES(Locks::mutator_lock_) {
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intptr_t data = reinterpret_cast<intptr_t>(this) + DataOffset(component_size).Int32Value() +
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+ (index * component_size);
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return reinterpret_cast<void*>(data);
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}
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const void* GetRawData(size_t component_size, int32_t index) const {
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intptr_t data = reinterpret_cast<intptr_t>(this) + DataOffset(component_size).Int32Value() +
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+ (index * component_size);
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return reinterpret_cast<void*>(data);
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}
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// Returns true if the index is valid. If not, throws an ArrayIndexOutOfBoundsException and
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// returns false.
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template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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ALWAYS_INLINE bool CheckIsValidIndex(int32_t index) SHARED_REQUIRES(Locks::mutator_lock_);
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Array* CopyOf(Thread* self, int32_t new_length) SHARED_REQUIRES(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_);
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protected:
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void ThrowArrayStoreException(Object* object) SHARED_REQUIRES(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_);
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private:
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void ThrowArrayIndexOutOfBoundsException(int32_t index)
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SHARED_REQUIRES(Locks::mutator_lock_);
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// The number of array elements.
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int32_t length_;
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// Marker for the data (used by generated code)
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uint32_t first_element_[0];
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DISALLOW_IMPLICIT_CONSTRUCTORS(Array);
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};
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template<typename T>
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class MANAGED PrimitiveArray : public Array {
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public:
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typedef T ElementType;
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static PrimitiveArray<T>* Alloc(Thread* self, size_t length)
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SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
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const T* GetData() const ALWAYS_INLINE SHARED_REQUIRES(Locks::mutator_lock_) {
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return reinterpret_cast<const T*>(GetRawData(sizeof(T), 0));
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}
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T* GetData() ALWAYS_INLINE SHARED_REQUIRES(Locks::mutator_lock_) {
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return reinterpret_cast<T*>(GetRawData(sizeof(T), 0));
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}
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T Get(int32_t i) ALWAYS_INLINE SHARED_REQUIRES(Locks::mutator_lock_);
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T GetWithoutChecks(int32_t i) ALWAYS_INLINE SHARED_REQUIRES(Locks::mutator_lock_) {
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DCHECK(CheckIsValidIndex(i)) << "i=" << i << " length=" << GetLength();
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return GetData()[i];
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}
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void Set(int32_t i, T value) ALWAYS_INLINE SHARED_REQUIRES(Locks::mutator_lock_);
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// TODO fix thread safety analysis broken by the use of template. This should be
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// SHARED_REQUIRES(Locks::mutator_lock_).
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template<bool kTransactionActive, bool kCheckTransaction = true>
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void Set(int32_t i, T value) ALWAYS_INLINE NO_THREAD_SAFETY_ANALYSIS;
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// TODO fix thread safety analysis broken by the use of template. This should be
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// SHARED_REQUIRES(Locks::mutator_lock_).
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template<bool kTransactionActive,
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bool kCheckTransaction = true,
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VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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void SetWithoutChecks(int32_t i, T value) ALWAYS_INLINE NO_THREAD_SAFETY_ANALYSIS;
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/*
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* Works like memmove(), except we guarantee not to allow tearing of array values (ie using
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* smaller than element size copies). Arguments are assumed to be within the bounds of the array
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* and the arrays non-null.
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*/
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void Memmove(int32_t dst_pos, PrimitiveArray<T>* src, int32_t src_pos, int32_t count)
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SHARED_REQUIRES(Locks::mutator_lock_);
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/*
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* Works like memcpy(), except we guarantee not to allow tearing of array values (ie using
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* smaller than element size copies). Arguments are assumed to be within the bounds of the array
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* and the arrays non-null.
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*/
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void Memcpy(int32_t dst_pos, PrimitiveArray<T>* src, int32_t src_pos, int32_t count)
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SHARED_REQUIRES(Locks::mutator_lock_);
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static void SetArrayClass(Class* array_class) {
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CHECK(array_class_.IsNull());
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CHECK(array_class != nullptr);
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array_class_ = GcRoot<Class>(array_class);
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}
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static Class* GetArrayClass() SHARED_REQUIRES(Locks::mutator_lock_) {
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DCHECK(!array_class_.IsNull());
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return array_class_.Read();
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}
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static void ResetArrayClass() {
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CHECK(!array_class_.IsNull());
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array_class_ = GcRoot<Class>(nullptr);
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}
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static void VisitRoots(RootVisitor* visitor) SHARED_REQUIRES(Locks::mutator_lock_);
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private:
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static GcRoot<Class> array_class_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(PrimitiveArray);
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};
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// Either an IntArray or a LongArray.
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class PointerArray : public Array {
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public:
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template<typename T,
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VerifyObjectFlags kVerifyFlags = kVerifyNone,
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ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
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T GetElementPtrSize(uint32_t idx, size_t ptr_size)
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SHARED_REQUIRES(Locks::mutator_lock_);
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template<bool kTransactionActive = false, bool kUnchecked = false>
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void SetElementPtrSize(uint32_t idx, uint64_t element, size_t ptr_size)
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SHARED_REQUIRES(Locks::mutator_lock_);
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template<bool kTransactionActive = false, bool kUnchecked = false, typename T>
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void SetElementPtrSize(uint32_t idx, T* element, size_t ptr_size)
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SHARED_REQUIRES(Locks::mutator_lock_);
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// Fixup the pointers in the dest arrays by passing our pointers through the visitor. Only copies
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// to dest if visitor(source_ptr) != source_ptr.
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template <VerifyObjectFlags kVerifyFlags = kVerifyNone,
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ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
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typename Visitor>
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void Fixup(mirror::PointerArray* dest, size_t pointer_size, const Visitor& visitor)
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SHARED_REQUIRES(Locks::mutator_lock_);
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};
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} // namespace mirror
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} // namespace art
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#endif // ART_RUNTIME_MIRROR_ARRAY_H_
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