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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/mutex.h"
namespace art {
class ClassLinker;
template <class MirrorType> class ObjPtr;
class MemberOffset;
class Thread;
namespace mirror {
class Object;
template <class T> class ObjectArray;
} // namespace mirror
class IntrinsicObjects {
public:
enum class PatchType {
kIntegerValueOfObject,
kIntegerValueOfArray,
kLast = kIntegerValueOfArray
};
static uint32_t EncodePatch(PatchType patch_type, uint32_t index = 0u) {
DCHECK(patch_type == PatchType::kIntegerValueOfObject || 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);
}
// Functions for retrieving data for Integer.valueOf().
static ObjPtr<mirror::ObjectArray<mirror::Object>> LookupIntegerCache(
Thread* self, ClassLinker* class_linker) REQUIRES_SHARED(Locks::mutator_lock_);
static ObjPtr<mirror::ObjectArray<mirror::Object>> GetIntegerValueOfCache(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects)
REQUIRES_SHARED(Locks::mutator_lock_);
static ObjPtr<mirror::Object> GetIntegerValueOfObject(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects,
uint32_t index) REQUIRES_SHARED(Locks::mutator_lock_);
static MemberOffset GetIntegerValueOfArrayDataOffset(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects)
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_