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/*
* Copyright (C) 2018 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_COMPILER_OPTIMIZING_INTRINSIC_OBJECTS_H_
#define ART_COMPILER_OPTIMIZING_INTRINSIC_OBJECTS_H_
#include "base/bit_field.h"
#include "base/bit_utils.h"
#include "base/macros.h"
#include "base/mutex.h"
#include "obj_ptr.h"
#include "offsets.h"
namespace art HIDDEN {
class ClassLinker;
class MemberOffset;
class Thread;
namespace mirror {
class Object;
template <class T> class ObjectArray;
} // namespace mirror
#define BOXED_TYPES(V) \
V(Byte, -128, 127, DataType::Type::kInt8, 0) \
V(Short, -128, 127, DataType::Type::kInt16, kByteCacheLastIndex) \
V(Character, 0, 127, DataType::Type::kUint16, kShortCacheLastIndex) \
V(Integer, -128, 127, DataType::Type::kInt32, kCharacterCacheLastIndex)
#define DEFINE_BOXED_CONSTANTS(name, low, high, unused, start_index) \
static constexpr size_t k ##name ##CacheLastIndex = start_index + (high - low + 1); \
static constexpr size_t k ##name ##CacheFirstIndex = start_index;
BOXED_TYPES(DEFINE_BOXED_CONSTANTS)
static constexpr size_t kNumberOfBoxedCaches = kIntegerCacheLastIndex;
#undef DEFINE_BOXED_CONSTANTS
class IntrinsicObjects {
public:
enum class PatchType {
kValueOfObject,
kValueOfArray,
kLast = kValueOfArray
};
static uint32_t EncodePatch(PatchType patch_type, uint32_t index = 0u) {
return PatchTypeField::Encode(static_cast<uint32_t>(patch_type)) | IndexField::Encode(index);
}
static PatchType DecodePatchType(uint32_t intrinsic_data) {
return static_cast<PatchType>(PatchTypeField::Decode(intrinsic_data));
}
static uint32_t DecodePatchIndex(uint32_t intrinsic_data) {
return IndexField::Decode(intrinsic_data);
}
// Helpers returning addresses of objects, suitable for embedding in generated code.
#define DEFINE_BOXED_ACCESSES(name, unused1, unused2, unused3, start_index) \
static ObjPtr<mirror::Object> Get ##name ##ValueOfObject( \
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects, \
uint32_t index) REQUIRES_SHARED(Locks::mutator_lock_) { \
return GetValueOfObject(boot_image_live_objects, k ##name ##CacheFirstIndex, index); \
} \
static MemberOffset Get ##name ##ValueOfArrayDataOffset( \
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
return GetValueOfArrayDataOffset(boot_image_live_objects, k ##name ##CacheFirstIndex); \
}
BOXED_TYPES(DEFINE_BOXED_ACCESSES)
#undef DEFINED_BOXED_ACCESSES
EXPORT static void FillIntrinsicObjects(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects, size_t start_index)
REQUIRES_SHARED(Locks::mutator_lock_);
static constexpr size_t GetNumberOfIntrinsicObjects() {
return kNumberOfBoxedCaches;
}
EXPORT static ObjPtr<mirror::Object> GetValueOfObject(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects,
size_t start_index,
uint32_t index) REQUIRES_SHARED(Locks::mutator_lock_);
EXPORT static MemberOffset GetValueOfArrayDataOffset(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects,
size_t start_index) REQUIRES_SHARED(Locks::mutator_lock_);
private:
static constexpr size_t kPatchTypeBits =
MinimumBitsToStore(static_cast<uint32_t>(PatchType::kLast));
static constexpr size_t kIndexBits = BitSizeOf<uint32_t>() - kPatchTypeBits;
using PatchTypeField = BitField<uint32_t, 0u, kPatchTypeBits>;
using IndexField = BitField<uint32_t, kPatchTypeBits, kIndexBits>;
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_INTRINSIC_OBJECTS_H_
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