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      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 "imtable.h"
     24 
     25 namespace art {
     26 
     27 template <ReadBarrierOption kReadBarrierOption>
     28 inline mirror::Object* ImageHeader::GetImageRoot(ImageRoot image_root) const {
     29   mirror::ObjectArray<mirror::Object>* image_roots = GetImageRoots<kReadBarrierOption>();
     30   return image_roots->Get<kVerifyNone, kReadBarrierOption>(static_cast<int32_t>(image_root));
     31 }
     32 
     33 template <ReadBarrierOption kReadBarrierOption>
     34 inline mirror::ObjectArray<mirror::Object>* ImageHeader::GetImageRoots() const {
     35   // Need a read barrier as it's not visited during root scan.
     36   // Pass in the address of the local variable to the read barrier
     37   // rather than image_roots_ because it won't move (asserted below)
     38   // and it's a const member.
     39   mirror::ObjectArray<mirror::Object>* image_roots =
     40       reinterpret_cast<mirror::ObjectArray<mirror::Object>*>(image_roots_);
     41   mirror::ObjectArray<mirror::Object>* result =
     42       ReadBarrier::BarrierForRoot<mirror::ObjectArray<mirror::Object>, kReadBarrierOption>(
     43           &image_roots);
     44   DCHECK_EQ(image_roots, result);
     45   return image_roots;
     46 }
     47 
     48 template <typename Visitor>
     49 inline void ImageHeader::VisitPackedImTables(const Visitor& visitor,
     50                                              uint8_t* base,
     51                                              size_t pointer_size) const {
     52   const ImageSection& section = GetImageSection(kSectionImTables);
     53   for (size_t pos = 0; pos < section.Size();) {
     54     ImTable* imt = reinterpret_cast<ImTable*>(base + section.Offset() + pos);
     55     for (size_t i = 0; i < ImTable::kSize; ++i) {
     56       ArtMethod* orig = imt->Get(i, pointer_size);
     57       ArtMethod* updated = visitor(orig);
     58       if (updated != orig) {
     59         imt->Set(i, updated, pointer_size);
     60       }
     61     }
     62     pos += ImTable::SizeInBytes(pointer_size);
     63   }
     64 }
     65 
     66 template <typename Visitor>
     67 inline void ImageHeader::VisitPackedImtConflictTables(const Visitor& visitor,
     68                                                       uint8_t* base,
     69                                                       size_t pointer_size) const {
     70   const ImageSection& section = GetImageSection(kSectionIMTConflictTables);
     71   for (size_t pos = 0; pos < section.Size(); ) {
     72     auto* table = reinterpret_cast<ImtConflictTable*>(base + section.Offset() + pos);
     73     table->Visit([&visitor](const std::pair<ArtMethod*, ArtMethod*>& methods) {
     74       return std::make_pair(visitor(methods.first), visitor(methods.second));
     75     }, pointer_size);
     76     pos += table->ComputeSize(pointer_size);
     77   }
     78 }
     79 
     80 }  // namespace art
     81 
     82 #endif  // ART_RUNTIME_IMAGE_INL_H_
     83