/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_MIRROR_ARRAY_H_
#define ART_RUNTIME_MIRROR_ARRAY_H_
#include "base/enums.h"
#include "gc/allocator_type.h"
#include "gc_root.h"
#include "obj_ptr.h"
#include "object.h"
namespace art {
template<class T> class Handle;
namespace mirror {
class MANAGED Array : public Object {
public:
// The size of a java.lang.Class representing an array.
static uint32_t ClassSize(PointerSize pointer_size);
// Allocates an array with the given properties, if kFillUsable is true the array will be of at
// least component_count size, however, if there's usable space at the end of the allocation the
// array will fill it.
template <bool kIsInstrumented, bool kFillUsable = false>
ALWAYS_INLINE static Array* Alloc(Thread* self,
ObjPtr<Class> array_class,
int32_t component_count,
size_t component_size_shift,
gc::AllocatorType allocator_type)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
static Array* CreateMultiArray(Thread* self,
Handle<Class> element_class,
Handle<IntArray> dimensions)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
size_t SizeOf() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int32_t GetLength() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Array, length_));
}
void SetLength(int32_t length) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK_GE(length, 0);
// We use non transactional version since we can't undo this write. We also disable checking
// since it would fail during a transaction.
SetField32<false, false, kVerifyNone>(OFFSET_OF_OBJECT_MEMBER(Array, length_), length);
}
static MemberOffset LengthOffset() {
return OFFSET_OF_OBJECT_MEMBER(Array, length_);
}
static MemberOffset DataOffset(size_t component_size);
void* GetRawData(size_t component_size, int32_t index)
REQUIRES_SHARED(Locks::mutator_lock_) {
intptr_t data = reinterpret_cast<intptr_t>(this) + DataOffset(component_size).Int32Value() +
+ (index * component_size);
return reinterpret_cast<void*>(data);
}
const void* GetRawData(size_t component_size, int32_t index) const {
intptr_t data = reinterpret_cast<intptr_t>(this) + DataOffset(component_size).Int32Value() +
+ (index * component_size);
return reinterpret_cast<void*>(data);
}
// Returns true if the index is valid. If not, throws an ArrayIndexOutOfBoundsException and
// returns false.
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool CheckIsValidIndex(int32_t index) REQUIRES_SHARED(Locks::mutator_lock_);
Array* CopyOf(Thread* self, int32_t new_length) REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
protected:
void ThrowArrayStoreException(ObjPtr<Object> object) REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
private:
void ThrowArrayIndexOutOfBoundsException(int32_t index)
REQUIRES_SHARED(Locks::mutator_lock_);
// The number of array elements.
int32_t length_;
// Marker for the data (used by generated code)
uint32_t first_element_[0];
DISALLOW_IMPLICIT_CONSTRUCTORS(Array);
};
template<typename T>
class MANAGED PrimitiveArray : public Array {
public:
typedef T ElementType;
static PrimitiveArray<T>* Alloc(Thread* self, size_t length)
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
static PrimitiveArray<T>* AllocateAndFill(Thread* self, const T* data, size_t length)
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
const T* GetData() const ALWAYS_INLINE REQUIRES_SHARED(Locks::mutator_lock_) {
return reinterpret_cast<const T*>(GetRawData(sizeof(T), 0));
}
T* GetData() ALWAYS_INLINE REQUIRES_SHARED(Locks::mutator_lock_) {
return reinterpret_cast<T*>(GetRawData(sizeof(T), 0));
}
T Get(int32_t i) ALWAYS_INLINE REQUIRES_SHARED(Locks::mutator_lock_);
T GetWithoutChecks(int32_t i) ALWAYS_INLINE REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(CheckIsValidIndex(i)) << "i=" << i << " length=" << GetLength();
return GetData()[i];
}
void Set(int32_t i, T value) ALWAYS_INLINE REQUIRES_SHARED(Locks::mutator_lock_);
// TODO fix thread safety analysis broken by the use of template. This should be
// REQUIRES_SHARED(Locks::mutator_lock_).
template<bool kTransactionActive, bool kCheckTransaction = true>
void Set(int32_t i, T value) ALWAYS_INLINE NO_THREAD_SAFETY_ANALYSIS;
// TODO fix thread safety analysis broken by the use of template. This should be
// REQUIRES_SHARED(Locks::mutator_lock_).
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void SetWithoutChecks(int32_t i, T value) ALWAYS_INLINE NO_THREAD_SAFETY_ANALYSIS;
/*
* Works like memmove(), except we guarantee not to allow tearing of array values (ie using
* smaller than element size copies). Arguments are assumed to be within the bounds of the array
* and the arrays non-null.
*/
void Memmove(int32_t dst_pos, ObjPtr<PrimitiveArray<T>> src, int32_t src_pos, int32_t count)
REQUIRES_SHARED(Locks::mutator_lock_);
/*
* Works like memcpy(), except we guarantee not to allow tearing of array values (ie using
* smaller than element size copies). Arguments are assumed to be within the bounds of the array
* and the arrays non-null.
*/
void Memcpy(int32_t dst_pos, ObjPtr<PrimitiveArray<T>> src, int32_t src_pos, int32_t count)
REQUIRES_SHARED(Locks::mutator_lock_);
static void SetArrayClass(ObjPtr<Class> array_class);
template <ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
static Class* GetArrayClass() REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(!array_class_.IsNull());
return array_class_.Read<kReadBarrierOption>();
}
static void ResetArrayClass() {
CHECK(!array_class_.IsNull());
array_class_ = GcRoot<Class>(nullptr);
}
static void VisitRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
private:
static GcRoot<Class> array_class_;
DISALLOW_IMPLICIT_CONSTRUCTORS(PrimitiveArray);
};
// Declare the different primitive arrays. Instantiations will be in array.cc.
extern template class PrimitiveArray<uint8_t>; // BooleanArray
extern template class PrimitiveArray<int8_t>; // ByteArray
extern template class PrimitiveArray<uint16_t>; // CharArray
extern template class PrimitiveArray<double>; // DoubleArray
extern template class PrimitiveArray<float>; // FloatArray
extern template class PrimitiveArray<int32_t>; // IntArray
extern template class PrimitiveArray<int64_t>; // LongArray
extern template class PrimitiveArray<int16_t>; // ShortArray
// Either an IntArray or a LongArray.
class PointerArray : public Array {
public:
template<typename T,
VerifyObjectFlags kVerifyFlags = kVerifyNone,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
T GetElementPtrSize(uint32_t idx, PointerSize ptr_size)
REQUIRES_SHARED(Locks::mutator_lock_);
void** ElementAddress(size_t index, PointerSize ptr_size) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK_LT(index, static_cast<size_t>(GetLength()));
return reinterpret_cast<void**>(reinterpret_cast<uint8_t*>(this) +
Array::DataOffset(static_cast<size_t>(ptr_size)).Uint32Value() +
static_cast<size_t>(ptr_size) * index);
}
template<bool kTransactionActive = false, bool kUnchecked = false>
void SetElementPtrSize(uint32_t idx, uint64_t element, PointerSize ptr_size)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive = false, bool kUnchecked = false, typename T>
void SetElementPtrSize(uint32_t idx, T* element, PointerSize ptr_size)
REQUIRES_SHARED(Locks::mutator_lock_);
// Fixup the pointers in the dest arrays by passing our pointers through the visitor. Only copies
// to dest if visitor(source_ptr) != source_ptr.
template <VerifyObjectFlags kVerifyFlags = kVerifyNone,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
typename Visitor>
void Fixup(mirror::PointerArray* dest, PointerSize pointer_size, const Visitor& visitor)
REQUIRES_SHARED(Locks::mutator_lock_);
// Works like memcpy(), except we guarantee not to allow tearing of array values (ie using smaller
// than element size copies). Arguments are assumed to be within the bounds of the array and the
// arrays non-null. Cannot be called in an active transaction.
template<bool kUnchecked = false>
void Memcpy(int32_t dst_pos,
ObjPtr<PointerArray> src,
int32_t src_pos,
int32_t count,
PointerSize pointer_size)
REQUIRES_SHARED(Locks::mutator_lock_);
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_ARRAY_H_