| /* |
| * 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_OBJECT_ARRAY_INL_H_ |
| #define ART_RUNTIME_MIRROR_OBJECT_ARRAY_INL_H_ |
| |
| #include "object_array.h" |
| |
| #include <string> |
| |
| #include "android-base/stringprintf.h" |
| |
| #include "array-inl.h" |
| #include "gc/heap.h" |
| #include "mirror/class.h" |
| #include "obj_ptr-inl.h" |
| #include "runtime.h" |
| #include "handle_scope-inl.h" |
| #include "thread.h" |
| #include "utils.h" |
| |
| namespace art { |
| namespace mirror { |
| |
| template<class T> |
| inline ObjectArray<T>* ObjectArray<T>::Alloc(Thread* self, |
| ObjPtr<Class> object_array_class, |
| int32_t length, gc::AllocatorType allocator_type) { |
| Array* array = Array::Alloc<true>(self, |
| object_array_class.Ptr(), |
| length, |
| ComponentSizeShiftWidth(kHeapReferenceSize), |
| allocator_type); |
| if (UNLIKELY(array == nullptr)) { |
| return nullptr; |
| } |
| DCHECK_EQ(array->GetClass()->GetComponentSizeShift(), |
| ComponentSizeShiftWidth(kHeapReferenceSize)); |
| return array->AsObjectArray<T>(); |
| } |
| |
| template<class T> |
| inline ObjectArray<T>* ObjectArray<T>::Alloc(Thread* self, |
| ObjPtr<Class> object_array_class, |
| int32_t length) { |
| return Alloc(self, |
| object_array_class, |
| length, |
| Runtime::Current()->GetHeap()->GetCurrentAllocator()); |
| } |
| |
| template<class T> template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline T* ObjectArray<T>::Get(int32_t i) { |
| if (!CheckIsValidIndex(i)) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; |
| } |
| return GetFieldObject<T, kVerifyFlags, kReadBarrierOption>(OffsetOfElement(i)); |
| } |
| |
| template<class T> template<VerifyObjectFlags kVerifyFlags> |
| inline bool ObjectArray<T>::CheckAssignable(ObjPtr<T> object) { |
| if (object != nullptr) { |
| Class* element_class = GetClass<kVerifyFlags>()->GetComponentType(); |
| if (UNLIKELY(!object->InstanceOf(element_class))) { |
| ThrowArrayStoreException(object); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| template<class T> |
| inline void ObjectArray<T>::Set(int32_t i, ObjPtr<T> object) { |
| if (Runtime::Current()->IsActiveTransaction()) { |
| Set<true>(i, object); |
| } else { |
| Set<false>(i, object); |
| } |
| } |
| |
| template<class T> |
| template<bool kTransactionActive, bool kCheckTransaction, VerifyObjectFlags kVerifyFlags> |
| inline void ObjectArray<T>::Set(int32_t i, ObjPtr<T> object) { |
| if (CheckIsValidIndex(i) && CheckAssignable<kVerifyFlags>(object)) { |
| SetFieldObject<kTransactionActive, kCheckTransaction, kVerifyFlags>(OffsetOfElement(i), object); |
| } else { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| } |
| } |
| |
| template<class T> |
| template<bool kTransactionActive, bool kCheckTransaction, VerifyObjectFlags kVerifyFlags> |
| inline void ObjectArray<T>::SetWithoutChecks(int32_t i, ObjPtr<T> object) { |
| DCHECK(CheckIsValidIndex<kVerifyFlags>(i)); |
| DCHECK(CheckAssignable<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>(object)); |
| SetFieldObject<kTransactionActive, kCheckTransaction, kVerifyFlags>(OffsetOfElement(i), object); |
| } |
| |
| template<class T> |
| template<bool kTransactionActive, bool kCheckTransaction, VerifyObjectFlags kVerifyFlags> |
| inline void ObjectArray<T>::SetWithoutChecksAndWriteBarrier(int32_t i, ObjPtr<T> object) { |
| DCHECK(CheckIsValidIndex<kVerifyFlags>(i)); |
| // TODO: enable this check. It fails when writing the image in ImageWriter::FixupObjectArray. |
| // DCHECK(CheckAssignable(object)); |
| SetFieldObjectWithoutWriteBarrier<kTransactionActive, kCheckTransaction, kVerifyFlags>( |
| OffsetOfElement(i), object); |
| } |
| |
| template<class T> template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline T* ObjectArray<T>::GetWithoutChecks(int32_t i) { |
| DCHECK(CheckIsValidIndex(i)); |
| return GetFieldObject<T, kVerifyFlags, kReadBarrierOption>(OffsetOfElement(i)); |
| } |
| |
| template<class T> |
| inline void ObjectArray<T>::AssignableMemmove(int32_t dst_pos, |
| ObjPtr<ObjectArray<T>> src, |
| int32_t src_pos, |
| int32_t count) { |
| if (kIsDebugBuild) { |
| for (int i = 0; i < count; ++i) { |
| // The get will perform the VerifyObject. |
| src->GetWithoutChecks(src_pos + i); |
| } |
| } |
| // Perform the memmove using int memmove then perform the write barrier. |
| static_assert(sizeof(HeapReference<T>) == sizeof(uint32_t), |
| "art::mirror::HeapReference<T> and uint32_t have different sizes."); |
| // TODO: Optimize this later? |
| // We can't use memmove since it does not handle read barriers and may do by per byte copying. |
| // See b/32012820. |
| const bool copy_forward = (src != this) || (dst_pos < src_pos) || (dst_pos - src_pos >= count); |
| if (copy_forward) { |
| // Forward copy. |
| bool baker_non_gray_case = false; |
| if (kUseReadBarrier && kUseBakerReadBarrier) { |
| uintptr_t fake_address_dependency; |
| if (!ReadBarrier::IsGray(src.Ptr(), &fake_address_dependency)) { |
| baker_non_gray_case = true; |
| DCHECK_EQ(fake_address_dependency, 0U); |
| src.Assign(reinterpret_cast<ObjectArray<T>*>( |
| reinterpret_cast<uintptr_t>(src.Ptr()) | fake_address_dependency)); |
| for (int i = 0; i < count; ++i) { |
| // We can skip the RB here because 'src' isn't gray. |
| T* obj = src->template GetWithoutChecks<kDefaultVerifyFlags, kWithoutReadBarrier>( |
| src_pos + i); |
| SetWithoutChecksAndWriteBarrier<false>(dst_pos + i, obj); |
| } |
| } |
| } |
| if (!baker_non_gray_case) { |
| for (int i = 0; i < count; ++i) { |
| // We need a RB here. ObjectArray::GetWithoutChecks() contains a RB. |
| T* obj = src->GetWithoutChecks(src_pos + i); |
| SetWithoutChecksAndWriteBarrier<false>(dst_pos + i, obj); |
| } |
| } |
| } else { |
| // Backward copy. |
| bool baker_non_gray_case = false; |
| if (kUseReadBarrier && kUseBakerReadBarrier) { |
| uintptr_t fake_address_dependency; |
| if (!ReadBarrier::IsGray(src.Ptr(), &fake_address_dependency)) { |
| baker_non_gray_case = true; |
| DCHECK_EQ(fake_address_dependency, 0U); |
| src.Assign(reinterpret_cast<ObjectArray<T>*>( |
| reinterpret_cast<uintptr_t>(src.Ptr()) | fake_address_dependency)); |
| for (int i = count - 1; i >= 0; --i) { |
| // We can skip the RB here because 'src' isn't gray. |
| T* obj = src->template GetWithoutChecks<kDefaultVerifyFlags, kWithoutReadBarrier>( |
| src_pos + i); |
| SetWithoutChecksAndWriteBarrier<false>(dst_pos + i, obj); |
| } |
| } |
| } |
| if (!baker_non_gray_case) { |
| for (int i = count - 1; i >= 0; --i) { |
| // We need a RB here. ObjectArray::GetWithoutChecks() contains a RB. |
| T* obj = src->GetWithoutChecks(src_pos + i); |
| SetWithoutChecksAndWriteBarrier<false>(dst_pos + i, obj); |
| } |
| } |
| } |
| Runtime::Current()->GetHeap()->WriteBarrierArray(this, dst_pos, count); |
| if (kIsDebugBuild) { |
| for (int i = 0; i < count; ++i) { |
| // The get will perform the VerifyObject. |
| GetWithoutChecks(dst_pos + i); |
| } |
| } |
| } |
| |
| template<class T> |
| inline void ObjectArray<T>::AssignableMemcpy(int32_t dst_pos, |
| ObjPtr<ObjectArray<T>> src, |
| int32_t src_pos, |
| int32_t count) { |
| if (kIsDebugBuild) { |
| for (int i = 0; i < count; ++i) { |
| // The get will perform the VerifyObject. |
| src->GetWithoutChecks(src_pos + i); |
| } |
| } |
| // Perform the memmove using int memcpy then perform the write barrier. |
| static_assert(sizeof(HeapReference<T>) == sizeof(uint32_t), |
| "art::mirror::HeapReference<T> and uint32_t have different sizes."); |
| // TODO: Optimize this later? |
| // We can't use memmove since it does not handle read barriers and may do by per byte copying. |
| // See b/32012820. |
| bool baker_non_gray_case = false; |
| if (kUseReadBarrier && kUseBakerReadBarrier) { |
| uintptr_t fake_address_dependency; |
| if (!ReadBarrier::IsGray(src.Ptr(), &fake_address_dependency)) { |
| baker_non_gray_case = true; |
| DCHECK_EQ(fake_address_dependency, 0U); |
| src.Assign(reinterpret_cast<ObjectArray<T>*>( |
| reinterpret_cast<uintptr_t>(src.Ptr()) | fake_address_dependency)); |
| for (int i = 0; i < count; ++i) { |
| // We can skip the RB here because 'src' isn't gray. |
| Object* obj = src->template GetWithoutChecks<kDefaultVerifyFlags, kWithoutReadBarrier>( |
| src_pos + i); |
| SetWithoutChecksAndWriteBarrier<false>(dst_pos + i, obj); |
| } |
| } |
| } |
| if (!baker_non_gray_case) { |
| for (int i = 0; i < count; ++i) { |
| // We need a RB here. ObjectArray::GetWithoutChecks() contains a RB. |
| T* obj = src->GetWithoutChecks(src_pos + i); |
| SetWithoutChecksAndWriteBarrier<false>(dst_pos + i, obj); |
| } |
| } |
| Runtime::Current()->GetHeap()->WriteBarrierArray(this, dst_pos, count); |
| if (kIsDebugBuild) { |
| for (int i = 0; i < count; ++i) { |
| // The get will perform the VerifyObject. |
| GetWithoutChecks(dst_pos + i); |
| } |
| } |
| } |
| |
| template<class T> |
| template<bool kTransactionActive> |
| inline void ObjectArray<T>::AssignableCheckingMemcpy(int32_t dst_pos, |
| ObjPtr<ObjectArray<T>> src, |
| int32_t src_pos, |
| int32_t count, |
| bool throw_exception) { |
| DCHECK_NE(this, src) |
| << "This case should be handled with memmove that handles overlaps correctly"; |
| // We want to avoid redundant IsAssignableFrom checks where possible, so we cache a class that |
| // we know is assignable to the destination array's component type. |
| Class* dst_class = GetClass()->GetComponentType(); |
| Class* lastAssignableElementClass = dst_class; |
| |
| T* o = nullptr; |
| int i = 0; |
| bool baker_non_gray_case = false; |
| if (kUseReadBarrier && kUseBakerReadBarrier) { |
| uintptr_t fake_address_dependency; |
| if (!ReadBarrier::IsGray(src.Ptr(), &fake_address_dependency)) { |
| baker_non_gray_case = true; |
| DCHECK_EQ(fake_address_dependency, 0U); |
| src.Assign(reinterpret_cast<ObjectArray<T>*>( |
| reinterpret_cast<uintptr_t>(src.Ptr()) | fake_address_dependency)); |
| for (; i < count; ++i) { |
| // The follow get operations force the objects to be verified. |
| // We can skip the RB here because 'src' isn't gray. |
| o = src->template GetWithoutChecks<kDefaultVerifyFlags, kWithoutReadBarrier>( |
| src_pos + i); |
| if (o == nullptr) { |
| // Null is always assignable. |
| SetWithoutChecks<kTransactionActive>(dst_pos + i, nullptr); |
| } else { |
| // TODO: use the underlying class reference to avoid uncompression when not necessary. |
| Class* o_class = o->GetClass(); |
| if (LIKELY(lastAssignableElementClass == o_class)) { |
| SetWithoutChecks<kTransactionActive>(dst_pos + i, o); |
| } else if (LIKELY(dst_class->IsAssignableFrom(o_class))) { |
| lastAssignableElementClass = o_class; |
| SetWithoutChecks<kTransactionActive>(dst_pos + i, o); |
| } else { |
| // Can't put this element into the array, break to perform write-barrier and throw |
| // exception. |
| break; |
| } |
| } |
| } |
| } |
| } |
| if (!baker_non_gray_case) { |
| for (; i < count; ++i) { |
| // The follow get operations force the objects to be verified. |
| // We need a RB here. ObjectArray::GetWithoutChecks() contains a RB. |
| o = src->GetWithoutChecks(src_pos + i); |
| if (o == nullptr) { |
| // Null is always assignable. |
| SetWithoutChecks<kTransactionActive>(dst_pos + i, nullptr); |
| } else { |
| // TODO: use the underlying class reference to avoid uncompression when not necessary. |
| Class* o_class = o->GetClass(); |
| if (LIKELY(lastAssignableElementClass == o_class)) { |
| SetWithoutChecks<kTransactionActive>(dst_pos + i, o); |
| } else if (LIKELY(dst_class->IsAssignableFrom(o_class))) { |
| lastAssignableElementClass = o_class; |
| SetWithoutChecks<kTransactionActive>(dst_pos + i, o); |
| } else { |
| // Can't put this element into the array, break to perform write-barrier and throw |
| // exception. |
| break; |
| } |
| } |
| } |
| } |
| Runtime::Current()->GetHeap()->WriteBarrierArray(this, dst_pos, count); |
| if (UNLIKELY(i != count)) { |
| std::string actualSrcType(mirror::Object::PrettyTypeOf(o)); |
| std::string dstType(PrettyTypeOf()); |
| Thread* self = Thread::Current(); |
| std::string msg = android::base::StringPrintf( |
| "source[%d] of type %s cannot be stored in destination array of type %s", |
| src_pos + i, |
| actualSrcType.c_str(), |
| dstType.c_str()); |
| if (throw_exception) { |
| self->ThrowNewException("Ljava/lang/ArrayStoreException;", msg.c_str()); |
| } else { |
| LOG(FATAL) << msg; |
| } |
| } |
| } |
| |
| template<class T> |
| inline ObjectArray<T>* ObjectArray<T>::CopyOf(Thread* self, int32_t new_length) { |
| DCHECK_GE(new_length, 0); |
| // We may get copied by a compacting GC. |
| StackHandleScope<1> hs(self); |
| Handle<ObjectArray<T>> h_this(hs.NewHandle(this)); |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| gc::AllocatorType allocator_type = heap->IsMovableObject(this) ? heap->GetCurrentAllocator() : |
| heap->GetCurrentNonMovingAllocator(); |
| ObjectArray<T>* new_array = Alloc(self, GetClass(), new_length, allocator_type); |
| if (LIKELY(new_array != nullptr)) { |
| new_array->AssignableMemcpy(0, h_this.Get(), 0, std::min(h_this->GetLength(), new_length)); |
| } |
| return new_array; |
| } |
| |
| template<class T> |
| inline MemberOffset ObjectArray<T>::OffsetOfElement(int32_t i) { |
| return MemberOffset(DataOffset(kHeapReferenceSize).Int32Value() + (i * kHeapReferenceSize)); |
| } |
| |
| template<class T> template<typename Visitor> |
| inline void ObjectArray<T>::VisitReferences(const Visitor& visitor) { |
| const size_t length = static_cast<size_t>(GetLength()); |
| for (size_t i = 0; i < length; ++i) { |
| visitor(this, OffsetOfElement(i), false); |
| } |
| } |
| |
| } // namespace mirror |
| } // namespace art |
| |
| #endif // ART_RUNTIME_MIRROR_OBJECT_ARRAY_INL_H_ |