runtime/mirror/array-inl.h - LeafOS-Project/android_art - Gitiles

 /*
  * 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_INL_H_
 #define ART_RUNTIME_MIRROR_ARRAY_INL_H_

 #include "array.h"

 #include <android-base/logging.h>

 #include "base/bit_utils.h"
 #include "base/casts.h"
 #include "class.h"
 #include "obj_ptr-inl.h"
 #include "runtime.h"
 #include "thread-current-inl.h"

 namespace art {
 namespace mirror {

 inline uint32_t Array::ClassSize(PointerSize pointer_size) {
   uint32_t vtable_entries = Object::kVTableLength;
   return Class::ComputeClassSize(true, vtable_entries, 0, 0, 0, 0, 0, pointer_size);
 }

 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption, bool kIsObjArray>
 inline size_t Array::SizeOf() {
   // When we are certain that this is a object array, then don't fetch shift
   // from component_type_ as that doesn't work well with userfaultfd GC as the
   // component-type class may be allocated at a higher address than the array.
   size_t component_size_shift = kIsObjArray ?
                                     Primitive::ComponentSizeShift(Primitive::kPrimNot) :
                                     GetClass<kVerifyFlags, kReadBarrierOption>()
                                         ->template GetComponentSizeShift<kReadBarrierOption>();
   // Don't need to check this since we already check this in GetClass.
   int32_t component_count =
       GetLength<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>();
   // This is safe from overflow because the array was already allocated.
   size_t header_size = DataOffset(1U << component_size_shift).SizeValue();
   size_t data_size = component_count << component_size_shift;
   return header_size + data_size;
 }

 template<VerifyObjectFlags kVerifyFlags>
 inline bool Array::CheckIsValidIndex(int32_t index) {
   if (UNLIKELY(static_cast<uint32_t>(index) >=
                static_cast<uint32_t>(GetLength<kVerifyFlags>()))) {
     ThrowArrayIndexOutOfBoundsException(index);
     return false;
   }
   return true;
 }

 template<typename T>
 inline T PrimitiveArray<T>::Get(int32_t i) {
   if (!CheckIsValidIndex(i)) {
     DCHECK(Thread::Current()->IsExceptionPending());
     return T(0);
   }
   return GetWithoutChecks(i);
 }

 template<typename T>
 inline void PrimitiveArray<T>::Set(int32_t i, T value) {
   if (Runtime::Current()->IsActiveTransaction()) {
     Set<true>(i, value);
   } else {
     Set<false>(i, value);
   }
 }

 template<typename T>
 template<bool kTransactionActive, bool kCheckTransaction>
 inline void PrimitiveArray<T>::Set(int32_t i, T value) {
   if (CheckIsValidIndex(i)) {
     SetWithoutChecks<kTransactionActive, kCheckTransaction>(i, value);
   } else {
     DCHECK(Thread::Current()->IsExceptionPending());
   }
 }

 template<typename T>
 template<bool kTransactionActive, bool kCheckTransaction, VerifyObjectFlags kVerifyFlags>
 inline void PrimitiveArray<T>::SetWithoutChecks(int32_t i, T value) {
   if (kCheckTransaction) {
     DCHECK_EQ(kTransactionActive, Runtime::Current()->IsActiveTransaction());
   }
   if (kTransactionActive) {
     Runtime::Current()->RecordWriteArray(this, i, GetWithoutChecks(i));
   }
   DCHECK(CheckIsValidIndex<kVerifyFlags>(i)) << i << " " << GetLength<kVerifyFlags>();
   GetData()[i] = value;
 }
 // Backward copy where elements are of aligned appropriately for T. Count is in T sized units.
 // Copies are guaranteed not to tear when the sizeof T is less-than 64bit.
 template<typename T>
 static inline void ArrayBackwardCopy(T* d, const T* s, int32_t count) {
   d += count;
   s += count;
   for (int32_t i = 0; i < count; ++i) {
     d--;
     s--;
     *d = *s;
   }
 }

 // Forward copy where elements are of aligned appropriately for T. Count is in T sized units.
 // Copies are guaranteed not to tear when the sizeof T is less-than 64bit.
 template<typename T>
 static inline void ArrayForwardCopy(T* d, const T* s, int32_t count) {
   for (int32_t i = 0; i < count; ++i) {
     *d = *s;
     d++;
     s++;
   }
 }

 template<class T>
 inline void PrimitiveArray<T>::Memmove(int32_t dst_pos,
                                        ObjPtr<PrimitiveArray<T>> src,
                                        int32_t src_pos,
                                        int32_t count) {
   if (UNLIKELY(count == 0)) {
     return;
   }
   DCHECK_GE(dst_pos, 0);
   DCHECK_GE(src_pos, 0);
   DCHECK_GT(count, 0);
   DCHECK(src != nullptr);
   DCHECK_LT(dst_pos, GetLength());
   DCHECK_LE(dst_pos, GetLength() - count);
   DCHECK_LT(src_pos, src->GetLength());
   DCHECK_LE(src_pos, src->GetLength() - count);

   // Note for non-byte copies we can't rely on standard libc functions like memcpy(3) and memmove(3)
   // in our implementation, because they may copy byte-by-byte.
   if (LIKELY(src != this)) {
     // Memcpy ok for guaranteed non-overlapping distinct arrays.
     Memcpy(dst_pos, src, src_pos, count);
   } else {
     // Handle copies within the same array using the appropriate direction copy.
     void* dst_raw = GetRawData(sizeof(T), dst_pos);
     const void* src_raw = src->GetRawData(sizeof(T), src_pos);
     if (sizeof(T) == sizeof(uint8_t)) {
       uint8_t* d = reinterpret_cast<uint8_t*>(dst_raw);
       const uint8_t* s = reinterpret_cast<const uint8_t*>(src_raw);
       memmove(d, s, count);
     } else {
       const bool copy_forward = (dst_pos < src_pos) || (dst_pos - src_pos >= count);
       if (sizeof(T) == sizeof(uint16_t)) {
         uint16_t* d = reinterpret_cast<uint16_t*>(dst_raw);
         const uint16_t* s = reinterpret_cast<const uint16_t*>(src_raw);
         if (copy_forward) {
           ArrayForwardCopy<uint16_t>(d, s, count);
         } else {
           ArrayBackwardCopy<uint16_t>(d, s, count);
         }
       } else if (sizeof(T) == sizeof(uint32_t)) {
         uint32_t* d = reinterpret_cast<uint32_t*>(dst_raw);
         const uint32_t* s = reinterpret_cast<const uint32_t*>(src_raw);
         if (copy_forward) {
           ArrayForwardCopy<uint32_t>(d, s, count);
         } else {
           ArrayBackwardCopy<uint32_t>(d, s, count);
         }
       } else {
         DCHECK_EQ(sizeof(T), sizeof(uint64_t));
         uint64_t* d = reinterpret_cast<uint64_t*>(dst_raw);
         const uint64_t* s = reinterpret_cast<const uint64_t*>(src_raw);
         if (copy_forward) {
           ArrayForwardCopy<uint64_t>(d, s, count);
         } else {
           ArrayBackwardCopy<uint64_t>(d, s, count);
         }
       }
     }
   }
 }

 template<class T>
 inline void PrimitiveArray<T>::Memcpy(int32_t dst_pos,
                                       ObjPtr<PrimitiveArray<T>> src,
                                       int32_t src_pos,
                                       int32_t count) {
   if (UNLIKELY(count == 0)) {
     return;
   }
   DCHECK_GE(dst_pos, 0);
   DCHECK_GE(src_pos, 0);
   DCHECK_GT(count, 0);
   DCHECK(src != nullptr);
   DCHECK_LT(dst_pos, GetLength());
   DCHECK_LE(dst_pos, GetLength() - count);
   DCHECK_LT(src_pos, src->GetLength());
   DCHECK_LE(src_pos, src->GetLength() - count);

   // Note for non-byte copies we can't rely on standard libc functions like memcpy(3) and memmove(3)
   // in our implementation, because they may copy byte-by-byte.
   void* dst_raw = GetRawData(sizeof(T), dst_pos);
   const void* src_raw = src->GetRawData(sizeof(T), src_pos);
   if (sizeof(T) == sizeof(uint8_t)) {
     memcpy(dst_raw, src_raw, count);
   } else if (sizeof(T) == sizeof(uint16_t)) {
     uint16_t* d = reinterpret_cast<uint16_t*>(dst_raw);
     const uint16_t* s = reinterpret_cast<const uint16_t*>(src_raw);
     ArrayForwardCopy<uint16_t>(d, s, count);
   } else if (sizeof(T) == sizeof(uint32_t)) {
     uint32_t* d = reinterpret_cast<uint32_t*>(dst_raw);
     const uint32_t* s = reinterpret_cast<const uint32_t*>(src_raw);
     ArrayForwardCopy<uint32_t>(d, s, count);
   } else {
     DCHECK_EQ(sizeof(T), sizeof(uint64_t));
     uint64_t* d = reinterpret_cast<uint64_t*>(dst_raw);
     const uint64_t* s = reinterpret_cast<const uint64_t*>(src_raw);
     ArrayForwardCopy<uint64_t>(d, s, count);
   }
 }

 template<typename T, PointerSize kPointerSize, VerifyObjectFlags kVerifyFlags>
 inline T PointerArray::GetElementPtrSize(uint32_t idx) {
   if (kPointerSize == PointerSize::k64) {
     DCHECK(IsLongArray<kVerifyFlags>());
   } else {
     DCHECK(IsIntArray<kVerifyFlags>());
   }
   return GetElementPtrSizeUnchecked<T, kPointerSize, kVerifyFlags>(idx);
 }

 template<typename T, PointerSize kPointerSize, VerifyObjectFlags kVerifyFlags>
 inline T PointerArray::GetElementPtrSizeUnchecked(uint32_t idx) {
   // C style casts here since we sometimes have T be a pointer, or sometimes an integer
   // (for stack traces).
   using ConversionType = typename std::conditional_t<std::is_pointer_v<T>, uintptr_t, T>;
   // Note: we cast the array directly when unchecked as this code gets called by
   // runtime_image, which can pass a 64bit pointer and therefore cannot be held
   // by an ObjPtr.
   if (kPointerSize == PointerSize::k64) {
     uint64_t value =
         static_cast<uint64_t>(reinterpret_cast<LongArray*>(this)->GetWithoutChecks(idx));
     return (T) dchecked_integral_cast<ConversionType>(value);
   } else {
     uint32_t value =
         static_cast<uint32_t>(reinterpret_cast<IntArray*>(this)->GetWithoutChecks(idx));
     return (T) dchecked_integral_cast<ConversionType>(value);
   }
 }

 template<typename T, VerifyObjectFlags kVerifyFlags>
 inline T PointerArray::GetElementPtrSize(uint32_t idx, PointerSize ptr_size) {
   if (ptr_size == PointerSize::k64) {
     return GetElementPtrSize<T, PointerSize::k64, kVerifyFlags>(idx);
   }
   return GetElementPtrSize<T, PointerSize::k32, kVerifyFlags>(idx);
 }

 template<bool kTransactionActive, bool kCheckTransaction, bool kUnchecked>
 inline void PointerArray::SetElementPtrSize(uint32_t idx, uint64_t element, PointerSize ptr_size) {
   // Note: we cast the array directly when unchecked as this code gets called by
   // runtime_image, which can pass a 64bit pointer and therefore cannot be held
   // by an ObjPtr.
   if (ptr_size == PointerSize::k64) {
     (kUnchecked ? reinterpret_cast<LongArray*>(this) : AsLongArray().Ptr())->
         SetWithoutChecks<kTransactionActive, kCheckTransaction>(idx, element);
   } else {
     uint32_t element32 = dchecked_integral_cast<uint32_t>(element);
     (kUnchecked ? reinterpret_cast<IntArray*>(this) : AsIntArray().Ptr())
         ->SetWithoutChecks<kTransactionActive, kCheckTransaction>(idx, element32);
   }
 }

 template<bool kTransactionActive, bool kCheckTransaction, bool kUnchecked, typename T>
 inline void PointerArray::SetElementPtrSize(uint32_t idx, T* element, PointerSize ptr_size) {
   SetElementPtrSize<kTransactionActive, kCheckTransaction, kUnchecked>(
       idx, reinterpret_cast<uintptr_t>(element), ptr_size);
 }

 template <VerifyObjectFlags kVerifyFlags, typename Visitor>
 inline void PointerArray::Fixup(mirror::PointerArray* dest,
                                 PointerSize pointer_size,
                                 const Visitor& visitor) {
   for (size_t i = 0, count = GetLength(); i < count; ++i) {
     void* ptr = GetElementPtrSize<void*, kVerifyFlags>(i, pointer_size);
     void* new_ptr = visitor(ptr);
     if (ptr != new_ptr) {
       dest->SetElementPtrSize</*kActiveTransaction=*/ false,
                               /*kCheckTransaction=*/ true,
                               /*kUnchecked=*/ true>(i, new_ptr, pointer_size);
     }
   }
 }

 template<bool kUnchecked>
 void PointerArray::Memcpy(int32_t dst_pos,
                           ObjPtr<PointerArray> src,
                           int32_t src_pos,
                           int32_t count,
                           PointerSize ptr_size) {
   DCHECK(!Runtime::Current()->IsActiveTransaction());
   DCHECK(!src.IsNull());
   if (ptr_size == PointerSize::k64) {
     ObjPtr<LongArray> l_this = (kUnchecked ? ObjPtr<LongArray>::DownCast(ObjPtr<Object>(this))
                                            : AsLongArray());
     ObjPtr<LongArray> l_src = (kUnchecked ? ObjPtr<LongArray>::DownCast(ObjPtr<Object>(src))
                                           : src->AsLongArray());
     l_this->Memcpy(dst_pos, l_src, src_pos, count);
   } else {
     ObjPtr<IntArray> i_this = (kUnchecked ? ObjPtr<IntArray>::DownCast(ObjPtr<Object>(this))
                                           : AsIntArray());
     ObjPtr<IntArray> i_src = (kUnchecked ? ObjPtr<IntArray>::DownCast(ObjPtr<Object>(src.Ptr()))
                                          : src->AsIntArray());
     i_this->Memcpy(dst_pos, i_src, src_pos, count);
   }
 }

 }  // namespace mirror
 }  // namespace art

 #endif  // ART_RUNTIME_MIRROR_ARRAY_INL_H_
	/*
	* 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_INL_H_
	#define ART_RUNTIME_MIRROR_ARRAY_INL_H_

	#include "array.h"

	#include <android-base/logging.h>

	#include "base/bit_utils.h"
	#include "base/casts.h"
	#include "class.h"
	#include "obj_ptr-inl.h"
	#include "runtime.h"
	#include "thread-current-inl.h"

	namespace art {
	namespace mirror {

	inline uint32_t Array::ClassSize(PointerSize pointer_size) {
	uint32_t vtable_entries = Object::kVTableLength;
	return Class::ComputeClassSize(true, vtable_entries, 0, 0, 0, 0, 0, pointer_size);
	}

	template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption, bool kIsObjArray>
	inline size_t Array::SizeOf() {
	// When we are certain that this is a object array, then don't fetch shift
	// from component_type_ as that doesn't work well with userfaultfd GC as the
	// component-type class may be allocated at a higher address than the array.
	size_t component_size_shift = kIsObjArray ?
	Primitive::ComponentSizeShift(Primitive::kPrimNot) :
	GetClass<kVerifyFlags, kReadBarrierOption>()
	->template GetComponentSizeShift<kReadBarrierOption>();
	// Don't need to check this since we already check this in GetClass.
	int32_t component_count =
	GetLength<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>();
	// This is safe from overflow because the array was already allocated.
	size_t header_size = DataOffset(1U << component_size_shift).SizeValue();
	size_t data_size = component_count << component_size_shift;
	return header_size + data_size;
	}

	template<VerifyObjectFlags kVerifyFlags>
	inline bool Array::CheckIsValidIndex(int32_t index) {
	if (UNLIKELY(static_cast<uint32_t>(index) >=
	static_cast<uint32_t>(GetLength<kVerifyFlags>()))) {
	ThrowArrayIndexOutOfBoundsException(index);
	return false;
	}
	return true;
	}

	template<typename T>
	inline T PrimitiveArray<T>::Get(int32_t i) {
	if (!CheckIsValidIndex(i)) {
	DCHECK(Thread::Current()->IsExceptionPending());
	return T(0);
	}
	return GetWithoutChecks(i);
	}

	template<typename T>
	inline void PrimitiveArray<T>::Set(int32_t i, T value) {
	if (Runtime::Current()->IsActiveTransaction()) {
	Set<true>(i, value);
	} else {
	Set<false>(i, value);
	}
	}

	template<typename T>
	template<bool kTransactionActive, bool kCheckTransaction>
	inline void PrimitiveArray<T>::Set(int32_t i, T value) {
	if (CheckIsValidIndex(i)) {
	SetWithoutChecks<kTransactionActive, kCheckTransaction>(i, value);
	} else {
	DCHECK(Thread::Current()->IsExceptionPending());
	}
	}

	template<typename T>
	template<bool kTransactionActive, bool kCheckTransaction, VerifyObjectFlags kVerifyFlags>
	inline void PrimitiveArray<T>::SetWithoutChecks(int32_t i, T value) {
	if (kCheckTransaction) {
	DCHECK_EQ(kTransactionActive, Runtime::Current()->IsActiveTransaction());
	}
	if (kTransactionActive) {
	Runtime::Current()->RecordWriteArray(this, i, GetWithoutChecks(i));
	}
	DCHECK(CheckIsValidIndex<kVerifyFlags>(i)) << i << " " << GetLength<kVerifyFlags>();
	GetData()[i] = value;
	}
	// Backward copy where elements are of aligned appropriately for T. Count is in T sized units.
	// Copies are guaranteed not to tear when the sizeof T is less-than 64bit.
	template<typename T>
	static inline void ArrayBackwardCopy(T* d, const T* s, int32_t count) {
	d += count;
	s += count;
	for (int32_t i = 0; i < count; ++i) {
	d--;
	s--;
	d = s;
	}
	}

	// Forward copy where elements are of aligned appropriately for T. Count is in T sized units.
	// Copies are guaranteed not to tear when the sizeof T is less-than 64bit.
	template<typename T>
	static inline void ArrayForwardCopy(T* d, const T* s, int32_t count) {
	for (int32_t i = 0; i < count; ++i) {
	d = s;
	d++;
	s++;
	}
	}

	template<class T>
	inline void PrimitiveArray<T>::Memmove(int32_t dst_pos,
	ObjPtr<PrimitiveArray<T>> src,
	int32_t src_pos,
	int32_t count) {
	if (UNLIKELY(count == 0)) {
	return;
	}
	DCHECK_GE(dst_pos, 0);
	DCHECK_GE(src_pos, 0);
	DCHECK_GT(count, 0);
	DCHECK(src != nullptr);
	DCHECK_LT(dst_pos, GetLength());
	DCHECK_LE(dst_pos, GetLength() - count);
	DCHECK_LT(src_pos, src->GetLength());
	DCHECK_LE(src_pos, src->GetLength() - count);

	// Note for non-byte copies we can't rely on standard libc functions like memcpy(3) and memmove(3)
	// in our implementation, because they may copy byte-by-byte.
	if (LIKELY(src != this)) {
	// Memcpy ok for guaranteed non-overlapping distinct arrays.
	Memcpy(dst_pos, src, src_pos, count);
	} else {
	// Handle copies within the same array using the appropriate direction copy.
	void* dst_raw = GetRawData(sizeof(T), dst_pos);
	const void* src_raw = src->GetRawData(sizeof(T), src_pos);
	if (sizeof(T) == sizeof(uint8_t)) {
	uint8_t* d = reinterpret_cast<uint8_t*>(dst_raw);
	const uint8_t* s = reinterpret_cast<const uint8_t*>(src_raw);
	memmove(d, s, count);
	} else {
	const bool copy_forward = (dst_pos < src_pos) \|\| (dst_pos - src_pos >= count);
	if (sizeof(T) == sizeof(uint16_t)) {
	uint16_t* d = reinterpret_cast<uint16_t*>(dst_raw);
	const uint16_t* s = reinterpret_cast<const uint16_t*>(src_raw);
	if (copy_forward) {
	ArrayForwardCopy<uint16_t>(d, s, count);
	} else {
	ArrayBackwardCopy<uint16_t>(d, s, count);
	}
	} else if (sizeof(T) == sizeof(uint32_t)) {
	uint32_t* d = reinterpret_cast<uint32_t*>(dst_raw);
	const uint32_t* s = reinterpret_cast<const uint32_t*>(src_raw);
	if (copy_forward) {
	ArrayForwardCopy<uint32_t>(d, s, count);
	} else {
	ArrayBackwardCopy<uint32_t>(d, s, count);
	}
	} else {
	DCHECK_EQ(sizeof(T), sizeof(uint64_t));
	uint64_t* d = reinterpret_cast<uint64_t*>(dst_raw);
	const uint64_t* s = reinterpret_cast<const uint64_t*>(src_raw);
	if (copy_forward) {
	ArrayForwardCopy<uint64_t>(d, s, count);
	} else {
	ArrayBackwardCopy<uint64_t>(d, s, count);
	}
	}
	}
	}
	}

	template<class T>
	inline void PrimitiveArray<T>::Memcpy(int32_t dst_pos,
	ObjPtr<PrimitiveArray<T>> src,
	int32_t src_pos,
	int32_t count) {
	if (UNLIKELY(count == 0)) {
	return;
	}
	DCHECK_GE(dst_pos, 0);
	DCHECK_GE(src_pos, 0);
	DCHECK_GT(count, 0);
	DCHECK(src != nullptr);
	DCHECK_LT(dst_pos, GetLength());
	DCHECK_LE(dst_pos, GetLength() - count);
	DCHECK_LT(src_pos, src->GetLength());
	DCHECK_LE(src_pos, src->GetLength() - count);

	// Note for non-byte copies we can't rely on standard libc functions like memcpy(3) and memmove(3)
	// in our implementation, because they may copy byte-by-byte.
	void* dst_raw = GetRawData(sizeof(T), dst_pos);
	const void* src_raw = src->GetRawData(sizeof(T), src_pos);
	if (sizeof(T) == sizeof(uint8_t)) {
	memcpy(dst_raw, src_raw, count);
	} else if (sizeof(T) == sizeof(uint16_t)) {
	uint16_t* d = reinterpret_cast<uint16_t*>(dst_raw);
	const uint16_t* s = reinterpret_cast<const uint16_t*>(src_raw);
	ArrayForwardCopy<uint16_t>(d, s, count);
	} else if (sizeof(T) == sizeof(uint32_t)) {
	uint32_t* d = reinterpret_cast<uint32_t*>(dst_raw);
	const uint32_t* s = reinterpret_cast<const uint32_t*>(src_raw);
	ArrayForwardCopy<uint32_t>(d, s, count);
	} else {
	DCHECK_EQ(sizeof(T), sizeof(uint64_t));
	uint64_t* d = reinterpret_cast<uint64_t*>(dst_raw);
	const uint64_t* s = reinterpret_cast<const uint64_t*>(src_raw);
	ArrayForwardCopy<uint64_t>(d, s, count);
	}
	}

	template<typename T, PointerSize kPointerSize, VerifyObjectFlags kVerifyFlags>
	inline T PointerArray::GetElementPtrSize(uint32_t idx) {
	if (kPointerSize == PointerSize::k64) {
	DCHECK(IsLongArray<kVerifyFlags>());
	} else {
	DCHECK(IsIntArray<kVerifyFlags>());
	}
	return GetElementPtrSizeUnchecked<T, kPointerSize, kVerifyFlags>(idx);
	}

	template<typename T, PointerSize kPointerSize, VerifyObjectFlags kVerifyFlags>
	inline T PointerArray::GetElementPtrSizeUnchecked(uint32_t idx) {
	// C style casts here since we sometimes have T be a pointer, or sometimes an integer
	// (for stack traces).
	using ConversionType = typename std::conditional_t<std::is_pointer_v<T>, uintptr_t, T>;
	// Note: we cast the array directly when unchecked as this code gets called by
	// runtime_image, which can pass a 64bit pointer and therefore cannot be held
	// by an ObjPtr.
	if (kPointerSize == PointerSize::k64) {
	uint64_t value =
	static_cast<uint64_t>(reinterpret_cast<LongArray*>(this)->GetWithoutChecks(idx));
	return (T) dchecked_integral_cast<ConversionType>(value);
	} else {
	uint32_t value =
	static_cast<uint32_t>(reinterpret_cast<IntArray*>(this)->GetWithoutChecks(idx));
	return (T) dchecked_integral_cast<ConversionType>(value);
	}
	}

	template<typename T, VerifyObjectFlags kVerifyFlags>
	inline T PointerArray::GetElementPtrSize(uint32_t idx, PointerSize ptr_size) {
	if (ptr_size == PointerSize::k64) {
	return GetElementPtrSize<T, PointerSize::k64, kVerifyFlags>(idx);
	}
	return GetElementPtrSize<T, PointerSize::k32, kVerifyFlags>(idx);
	}

	template<bool kTransactionActive, bool kCheckTransaction, bool kUnchecked>
	inline void PointerArray::SetElementPtrSize(uint32_t idx, uint64_t element, PointerSize ptr_size) {
	// Note: we cast the array directly when unchecked as this code gets called by
	// runtime_image, which can pass a 64bit pointer and therefore cannot be held
	// by an ObjPtr.
	if (ptr_size == PointerSize::k64) {
	(kUnchecked ? reinterpret_cast<LongArray*>(this) : AsLongArray().Ptr())->
	SetWithoutChecks<kTransactionActive, kCheckTransaction>(idx, element);
	} else {
	uint32_t element32 = dchecked_integral_cast<uint32_t>(element);
	(kUnchecked ? reinterpret_cast<IntArray*>(this) : AsIntArray().Ptr())
	->SetWithoutChecks<kTransactionActive, kCheckTransaction>(idx, element32);
	}
	}

	template<bool kTransactionActive, bool kCheckTransaction, bool kUnchecked, typename T>
	inline void PointerArray::SetElementPtrSize(uint32_t idx, T* element, PointerSize ptr_size) {
	SetElementPtrSize<kTransactionActive, kCheckTransaction, kUnchecked>(
	idx, reinterpret_cast<uintptr_t>(element), ptr_size);
	}

	template <VerifyObjectFlags kVerifyFlags, typename Visitor>
	inline void PointerArray::Fixup(mirror::PointerArray* dest,
	PointerSize pointer_size,
	const Visitor& visitor) {
	for (size_t i = 0, count = GetLength(); i < count; ++i) {
	void* ptr = GetElementPtrSize<void*, kVerifyFlags>(i, pointer_size);
	void* new_ptr = visitor(ptr);
	if (ptr != new_ptr) {
	dest->SetElementPtrSize</kActiveTransaction=/ false,
	/kCheckTransaction=/ true,
	/kUnchecked=/ true>(i, new_ptr, pointer_size);
	}
	}
	}

	template<bool kUnchecked>
	void PointerArray::Memcpy(int32_t dst_pos,
	ObjPtr<PointerArray> src,
	int32_t src_pos,
	int32_t count,
	PointerSize ptr_size) {
	DCHECK(!Runtime::Current()->IsActiveTransaction());
	DCHECK(!src.IsNull());
	if (ptr_size == PointerSize::k64) {
	ObjPtr<LongArray> l_this = (kUnchecked ? ObjPtr<LongArray>::DownCast(ObjPtr<Object>(this))
	: AsLongArray());
	ObjPtr<LongArray> l_src = (kUnchecked ? ObjPtr<LongArray>::DownCast(ObjPtr<Object>(src))
	: src->AsLongArray());
	l_this->Memcpy(dst_pos, l_src, src_pos, count);
	} else {
	ObjPtr<IntArray> i_this = (kUnchecked ? ObjPtr<IntArray>::DownCast(ObjPtr<Object>(this))
	: AsIntArray());
	ObjPtr<IntArray> i_src = (kUnchecked ? ObjPtr<IntArray>::DownCast(ObjPtr<Object>(src.Ptr()))
	: src->AsIntArray());
	i_this->Memcpy(dst_pos, i_src, src_pos, count);
	}
	}

	} // namespace mirror
	} // namespace art

	#endif // ART_RUNTIME_MIRROR_ARRAY_INL_H_