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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.
*/
#include "array-inl.h"
#include "array-alloc-inl.h"
#include "base/utils.h"
#include "class-inl.h"
#include "class.h"
#include "class_linker-inl.h"
#include "class_root.h"
#include "common_throws.h"
#include "dex/dex_file-inl.h"
#include "gc/accounting/card_table-inl.h"
#include "handle_scope-inl.h"
#include "object-inl.h"
#include "object_array-alloc-inl.h"
#include "object_array-inl.h"
#include "thread.h"
namespace art {
namespace mirror {
using android::base::StringPrintf;
// Create a multi-dimensional array of Objects or primitive types.
//
// We have to generate the names for X[], X[][], X[][][], and so on. The
// easiest way to deal with that is to create the full name once and then
// subtract pieces off. Besides, we want to start with the outermost
// piece and work our way in.
// Recursively create an array with multiple dimensions. Elements may be
// Objects or primitive types.
static ObjPtr<Array> RecursiveCreateMultiArray(Thread* self,
Handle<Class> array_class,
int current_dimension,
Handle<mirror::IntArray> dimensions)
REQUIRES_SHARED(Locks::mutator_lock_) {
int32_t array_length = dimensions->Get(current_dimension);
StackHandleScope<2> hs(self);
Handle<mirror::Class> h_component_type(hs.NewHandle(array_class->GetComponentType()));
size_t component_size_shift = h_component_type->GetPrimitiveTypeSizeShift();
gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
Handle<Array> new_array(hs.NewHandle(
Array::Alloc(self, array_class.Get(), array_length, component_size_shift, allocator_type)));
if (UNLIKELY(new_array == nullptr)) {
CHECK(self->IsExceptionPending());
return nullptr;
}
if (current_dimension + 1 < dimensions->GetLength()) {
// Create a new sub-array in every element of the array.
for (int32_t i = 0; i < array_length; i++) {
ObjPtr<Array> sub_array =
RecursiveCreateMultiArray(self, h_component_type, current_dimension + 1, dimensions);
if (UNLIKELY(sub_array == nullptr)) {
CHECK(self->IsExceptionPending());
return nullptr;
}
// Use non-transactional mode without check.
new_array->AsObjectArray<Array>()->Set<false, false>(i, sub_array);
}
}
return new_array.Get();
}
ObjPtr<Array> Array::CreateMultiArray(Thread* self,
Handle<Class> element_class,
Handle<IntArray> dimensions) {
// Verify dimensions.
//
// The caller is responsible for verifying that "dimArray" is non-null
// and has a length > 0 and <= 255.
int num_dimensions = dimensions->GetLength();
DCHECK_GT(num_dimensions, 0);
DCHECK_LE(num_dimensions, 255);
for (int i = 0; i < num_dimensions; i++) {
int dimension = dimensions->Get(i);
if (UNLIKELY(dimension < 0)) {
ThrowNegativeArraySizeException(StringPrintf("Dimension %d: %d", i, dimension).c_str());
return nullptr;
}
}
// Find/generate the array class.
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
StackHandleScope<1> hs(self);
MutableHandle<mirror::Class> array_class(
hs.NewHandle(class_linker->FindArrayClass(self, element_class.Get())));
if (UNLIKELY(array_class == nullptr)) {
CHECK(self->IsExceptionPending());
return nullptr;
}
for (int32_t i = 1; i < dimensions->GetLength(); ++i) {
array_class.Assign(class_linker->FindArrayClass(self, array_class.Get()));
if (UNLIKELY(array_class == nullptr)) {
CHECK(self->IsExceptionPending());
return nullptr;
}
}
// Create the array.
ObjPtr<Array> new_array = RecursiveCreateMultiArray(self, array_class, 0, dimensions);
if (UNLIKELY(new_array == nullptr)) {
CHECK(self->IsExceptionPending());
}
return new_array.Ptr();
}
template<typename T>
ObjPtr<PrimitiveArray<T>> PrimitiveArray<T>::Alloc(Thread* self, size_t length) {
gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
ObjPtr<Array> raw_array = Array::Alloc(self,
GetClassRoot<PrimitiveArray<T>>(),
length,
ComponentSizeShiftWidth(sizeof(T)),
allocator_type);
return ObjPtr<PrimitiveArray<T>>::DownCast(raw_array);
}
void Array::ThrowArrayIndexOutOfBoundsException(int32_t index) {
art::ThrowArrayIndexOutOfBoundsException(index, GetLength());
}
void Array::ThrowArrayStoreException(ObjPtr<Object> object) {
art::ThrowArrayStoreException(object->GetClass(), this->GetClass());
}
ObjPtr<Array> Array::CopyOf(Handle<Array> h_this, Thread* self, int32_t new_length) {
ObjPtr<Class> klass = h_this->GetClass();
CHECK(klass->IsPrimitiveArray()) << "Will miss write barriers";
DCHECK_GE(new_length, 0);
auto* heap = Runtime::Current()->GetHeap();
gc::AllocatorType allocator_type = heap->IsMovableObject(h_this.Get())
? heap->GetCurrentAllocator()
: heap->GetCurrentNonMovingAllocator();
const auto component_size = klass->GetComponentSize();
const auto component_shift = klass->GetComponentSizeShift();
ObjPtr<Array> new_array =
Alloc(self, klass, new_length, component_shift, allocator_type); // Invalidates klass.
if (LIKELY(new_array != nullptr)) {
memcpy(new_array->GetRawData(component_size, 0),
h_this->GetRawData(component_size, 0),
std::min(h_this->GetLength(), new_length) << component_shift);
}
return new_array;
}
// Explicitly instantiate all the primitive array types.
template class PrimitiveArray<uint8_t>; // BooleanArray
template class PrimitiveArray<int8_t>; // ByteArray
template class PrimitiveArray<uint16_t>; // CharArray
template class PrimitiveArray<double>; // DoubleArray
template class PrimitiveArray<float>; // FloatArray
template class PrimitiveArray<int32_t>; // IntArray
template class PrimitiveArray<int64_t>; // LongArray
template class PrimitiveArray<int16_t>; // ShortArray
} // namespace mirror
} // namespace art
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