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/*
* 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 "object.h"
#include "object_callbacks.h"
#include "gc/heap.h"
#include "runtime.h"
#include "thread.h"
namespace art {
namespace mirror {
class MANAGED Array : public Object {
public:
// A convenience for code that doesn't know the component size, and doesn't want to have to work
// it out itself.
template <bool kIsInstrumented>
static Array* Alloc(Thread* self, Class* array_class, int32_t component_count,
gc::AllocatorType allocator_type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
template <bool kIsInstrumented>
static Array* Alloc(Thread* self, Class* array_class, int32_t component_count,
size_t component_size, gc::AllocatorType allocator_type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
template <bool kIsInstrumented>
static Array* Alloc(Thread* self, Class* array_class, int32_t component_count)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
template <bool kIsInstrumented>
static Array* Alloc(Thread* self, Class* array_class, int32_t component_count,
size_t component_size)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
static Array* CreateMultiArray(Thread* self, const SirtRef<Class>& element_class,
const SirtRef<IntArray>& dimensions)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
size_t SizeOf() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
int32_t GetLength() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
return GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Array, length_), false);
}
void SetLength(int32_t length) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
CHECK_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, false);
}
static MemberOffset LengthOffset() {
return OFFSET_OF_OBJECT_MEMBER(Array, length_);
}
static MemberOffset DataOffset(size_t component_size) {
if (component_size != sizeof(int64_t)) {
return OFFSET_OF_OBJECT_MEMBER(Array, first_element_);
} else {
// Align longs and doubles.
return MemberOffset(OFFSETOF_MEMBER(Array, first_element_) + 4);
}
}
void* GetRawData(size_t component_size, int32_t index)
SHARED_LOCKS_REQUIRED(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>
bool CheckIsValidIndex(int32_t index) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (UNLIKELY(static_cast<uint32_t>(index) >=
static_cast<uint32_t>(GetLength<kVerifyFlags>()))) {
ThrowArrayIndexOutOfBoundsException(index);
return false;
}
return true;
}
protected:
void ThrowArrayStoreException(Object* object) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
void ThrowArrayIndexOutOfBoundsException(int32_t index)
SHARED_LOCKS_REQUIRED(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<class T>
class MANAGED PrimitiveArray : public Array {
public:
typedef T ElementType;
static PrimitiveArray<T>* Alloc(Thread* self, size_t length)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const T* GetData() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
return reinterpret_cast<const T*>(GetRawData(sizeof(T), 0));
}
T* GetData() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
return reinterpret_cast<T*>(GetRawData(sizeof(T), 0));
}
T Get(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (UNLIKELY(!CheckIsValidIndex(i))) {
DCHECK(Thread::Current()->IsExceptionPending());
return T(0);
}
return GetWithoutChecks(i);
}
T GetWithoutChecks(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
DCHECK(CheckIsValidIndex(i));
return GetData()[i];
}
void Set(int32_t i, T value) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (Runtime::Current()->IsActiveTransaction()) {
Set<true>(i, value);
} else {
Set<false>(i, value);
}
}
// TODO fix thread safety analysis broken by the use of template. This should be
// SHARED_LOCKS_REQUIRED(Locks::mutator_lock_).
template<bool kTransactionActive, bool kCheckTransaction = true>
void Set(int32_t i, T value) NO_THREAD_SAFETY_ANALYSIS {
if (LIKELY(CheckIsValidIndex(i))) {
SetWithoutChecks<kTransactionActive, kCheckTransaction>(i, value);
} else {
DCHECK(Thread::Current()->IsExceptionPending());
}
}
// TODO fix thread safety analysis broken by the use of template. This should be
// SHARED_LOCKS_REQUIRED(Locks::mutator_lock_).
template<bool kTransactionActive, bool kCheckTransaction = true>
void SetWithoutChecks(int32_t i, T value) NO_THREAD_SAFETY_ANALYSIS {
if (kCheckTransaction) {
DCHECK_EQ(kTransactionActive, Runtime::Current()->IsActiveTransaction());
}
if (kTransactionActive) {
Runtime::Current()->RecordWriteArray(this, i, GetWithoutChecks(i));
}
DCHECK(CheckIsValidIndex(i));
GetData()[i] = value;
}
/*
* 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, PrimitiveArray<T>* src, int32_t src_pos, int32_t count)
SHARED_LOCKS_REQUIRED(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, PrimitiveArray<T>* src, int32_t src_pos, int32_t count)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
static void SetArrayClass(Class* array_class) {
CHECK(array_class_ == NULL);
CHECK(array_class != NULL);
array_class_ = array_class;
}
static void ResetArrayClass() {
CHECK(array_class_ != NULL);
array_class_ = NULL;
}
static void VisitRoots(RootCallback* callback, void* arg)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
static Class* array_class_;
DISALLOW_IMPLICIT_CONSTRUCTORS(PrimitiveArray);
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_ARRAY_H_
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