1 /* 2 * Copyright (C) 2016 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_RUNTIME_IMAGE_INL_H_ 18 #define ART_RUNTIME_IMAGE_INL_H_ 19 20 #include "image.h" 21 22 #include "art_method.h" 23 #include "imt_conflict_table.h" 24 #include "imtable.h" 25 #include "mirror/object_array-inl.h" 26 #include "obj_ptr-inl.h" 27 #include "read_barrier-inl.h" 28 29 namespace art { 30 31 template <ReadBarrierOption kReadBarrierOption> 32 inline ObjPtr<mirror::Object> ImageHeader::GetImageRoot(ImageRoot image_root) const { 33 ObjPtr<mirror::ObjectArray<mirror::Object>> image_roots = GetImageRoots<kReadBarrierOption>(); 34 return image_roots->Get<kVerifyNone, kReadBarrierOption>(static_cast<int32_t>(image_root)); 35 } 36 37 template <ReadBarrierOption kReadBarrierOption> 38 inline ObjPtr<mirror::ObjectArray<mirror::Object>> ImageHeader::GetImageRoots() const { 39 // Need a read barrier as it's not visited during root scan. 40 // Pass in the address of the local variable to the read barrier 41 // rather than image_roots_ because it won't move (asserted below) 42 // and it's a const member. 43 mirror::ObjectArray<mirror::Object>* image_roots = 44 reinterpret_cast<mirror::ObjectArray<mirror::Object>*>(image_roots_); 45 mirror::ObjectArray<mirror::Object>* result = 46 ReadBarrier::BarrierForRoot<mirror::ObjectArray<mirror::Object>, kReadBarrierOption>( 47 &image_roots); 48 DCHECK_EQ(image_roots, result); 49 return image_roots; 50 } 51 52 template <typename Visitor> 53 inline void ImageHeader::VisitPackedArtFields(const Visitor& visitor, uint8_t* base) const { 54 const ImageSection& fields = GetFieldsSection(); 55 for (size_t pos = 0u; pos < fields.Size(); ) { 56 auto* array = reinterpret_cast<LengthPrefixedArray<ArtField>*>(base + fields.Offset() + pos); 57 for (size_t i = 0u; i < array->size(); ++i) { 58 visitor(array->At(i, sizeof(ArtField))); 59 } 60 pos += array->ComputeSize(array->size()); 61 } 62 } 63 64 template <typename Visitor> 65 inline void ImageHeader::VisitPackedArtMethods(const Visitor& visitor, 66 uint8_t* base, 67 PointerSize pointer_size) const { 68 const size_t method_alignment = ArtMethod::Alignment(pointer_size); 69 const size_t method_size = ArtMethod::Size(pointer_size); 70 const ImageSection& methods = GetMethodsSection(); 71 for (size_t pos = 0u; pos < methods.Size(); ) { 72 auto* array = reinterpret_cast<LengthPrefixedArray<ArtMethod>*>(base + methods.Offset() + pos); 73 for (size_t i = 0u; i < array->size(); ++i) { 74 visitor(array->At(i, method_size, method_alignment)); 75 } 76 pos += array->ComputeSize(array->size(), method_size, method_alignment); 77 } 78 const ImageSection& runtime_methods = GetRuntimeMethodsSection(); 79 for (size_t pos = 0u; pos < runtime_methods.Size(); ) { 80 auto* method = reinterpret_cast<ArtMethod*>(base + runtime_methods.Offset() + pos); 81 visitor(*method); 82 pos += method_size; 83 } 84 } 85 86 template <typename Visitor> 87 inline void ImageHeader::VisitPackedImTables(const Visitor& visitor, 88 uint8_t* base, 89 PointerSize pointer_size) const { 90 const ImageSection& section = GetImTablesSection(); 91 for (size_t pos = 0; pos < section.Size();) { 92 ImTable* imt = reinterpret_cast<ImTable*>(base + section.Offset() + pos); 93 for (size_t i = 0; i < ImTable::kSize; ++i) { 94 ArtMethod* orig = imt->Get(i, pointer_size); 95 ArtMethod* updated = visitor(orig); 96 if (updated != orig) { 97 imt->Set(i, updated, pointer_size); 98 } 99 } 100 pos += ImTable::SizeInBytes(pointer_size); 101 } 102 } 103 104 template <typename Visitor> 105 inline void ImageHeader::VisitPackedImtConflictTables(const Visitor& visitor, 106 uint8_t* base, 107 PointerSize pointer_size) const { 108 const ImageSection& section = GetIMTConflictTablesSection(); 109 for (size_t pos = 0; pos < section.Size(); ) { 110 auto* table = reinterpret_cast<ImtConflictTable*>(base + section.Offset() + pos); 111 table->Visit([&visitor](const std::pair<ArtMethod*, ArtMethod*>& methods) { 112 return std::make_pair(visitor(methods.first), visitor(methods.second)); 113 }, pointer_size); 114 pos += table->ComputeSize(pointer_size); 115 } 116 } 117 118 } // namespace art 119 120 #endif // ART_RUNTIME_IMAGE_INL_H_ 121