1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_OPTIMIZING_INTRINSIC_OBJECTS_H_ 18 #define ART_COMPILER_OPTIMIZING_INTRINSIC_OBJECTS_H_ 19 20 #include "base/bit_field.h" 21 #include "base/bit_utils.h" 22 #include "base/macros.h" 23 #include "base/mutex.h" 24 25 namespace art HIDDEN { 26 27 class ClassLinker; 28 template <class MirrorType> class ObjPtr; 29 class MemberOffset; 30 class Thread; 31 32 namespace mirror { 33 class Object; 34 template <class T> class ObjectArray; 35 } // namespace mirror 36 37 class IntrinsicObjects { 38 public: 39 enum class PatchType { 40 kIntegerValueOfObject, 41 kIntegerValueOfArray, 42 43 kLast = kIntegerValueOfArray 44 }; 45 46 static uint32_t EncodePatch(PatchType patch_type, uint32_t index = 0u) { 47 DCHECK(patch_type == PatchType::kIntegerValueOfObject || index == 0u); 48 return PatchTypeField::Encode(static_cast<uint32_t>(patch_type)) | IndexField::Encode(index); 49 } 50 DecodePatchType(uint32_t intrinsic_data)51 static PatchType DecodePatchType(uint32_t intrinsic_data) { 52 return static_cast<PatchType>(PatchTypeField::Decode(intrinsic_data)); 53 } 54 DecodePatchIndex(uint32_t intrinsic_data)55 static uint32_t DecodePatchIndex(uint32_t intrinsic_data) { 56 return IndexField::Decode(intrinsic_data); 57 } 58 59 // Functions for retrieving data for Integer.valueOf(). 60 EXPORT static ObjPtr<mirror::ObjectArray<mirror::Object>> LookupIntegerCache( 61 Thread* self, ClassLinker* class_linker) REQUIRES_SHARED(Locks::mutator_lock_); 62 EXPORT static ObjPtr<mirror::ObjectArray<mirror::Object>> GetIntegerValueOfCache( 63 ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects) 64 REQUIRES_SHARED(Locks::mutator_lock_); 65 EXPORT static ObjPtr<mirror::Object> GetIntegerValueOfObject( 66 ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects, 67 uint32_t index) REQUIRES_SHARED(Locks::mutator_lock_); 68 EXPORT static MemberOffset GetIntegerValueOfArrayDataOffset( 69 ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects) 70 REQUIRES_SHARED(Locks::mutator_lock_); 71 72 private: 73 static constexpr size_t kPatchTypeBits = 74 MinimumBitsToStore(static_cast<uint32_t>(PatchType::kLast)); 75 static constexpr size_t kIndexBits = BitSizeOf<uint32_t>() - kPatchTypeBits; 76 using PatchTypeField = BitField<uint32_t, 0u, kPatchTypeBits>; 77 using IndexField = BitField<uint32_t, kPatchTypeBits, kIndexBits>; 78 }; 79 80 } // namespace art 81 82 #endif // ART_COMPILER_OPTIMIZING_INTRINSIC_OBJECTS_H_ 83