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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 "imt_conflict_table.h"
     24 #include "imtable.h"
     25 #include "read_barrier-inl.h"
     26 
     27 namespace art {
     28 
     29 template <ReadBarrierOption kReadBarrierOption>
     30 inline mirror::Object* ImageHeader::GetImageRoot(ImageRoot image_root) const {
     31   mirror::ObjectArray<mirror::Object>* image_roots = GetImageRoots<kReadBarrierOption>();
     32   return image_roots->Get<kVerifyNone, kReadBarrierOption>(static_cast<int32_t>(image_root));
     33 }
     34 
     35 template <ReadBarrierOption kReadBarrierOption>
     36 inline mirror::ObjectArray<mirror::Object>* ImageHeader::GetImageRoots() const {
     37   // Need a read barrier as it's not visited during root scan.
     38   // Pass in the address of the local variable to the read barrier
     39   // rather than image_roots_ because it won't move (asserted below)
     40   // and it's a const member.
     41   mirror::ObjectArray<mirror::Object>* image_roots =
     42       reinterpret_cast<mirror::ObjectArray<mirror::Object>*>(image_roots_);
     43   mirror::ObjectArray<mirror::Object>* result =
     44       ReadBarrier::BarrierForRoot<mirror::ObjectArray<mirror::Object>, kReadBarrierOption>(
     45           &image_roots);
     46   DCHECK_EQ(image_roots, result);
     47   return image_roots;
     48 }
     49 
     50 template <typename Visitor>
     51 inline void ImageHeader::VisitPackedImTables(const Visitor& visitor,
     52                                              uint8_t* base,
     53                                              PointerSize pointer_size) const {
     54   const ImageSection& section = GetImageSection(kSectionImTables);
     55   for (size_t pos = 0; pos < section.Size();) {
     56     ImTable* imt = reinterpret_cast<ImTable*>(base + section.Offset() + pos);
     57     for (size_t i = 0; i < ImTable::kSize; ++i) {
     58       ArtMethod* orig = imt->Get(i, pointer_size);
     59       ArtMethod* updated = visitor(orig);
     60       if (updated != orig) {
     61         imt->Set(i, updated, pointer_size);
     62       }
     63     }
     64     pos += ImTable::SizeInBytes(pointer_size);
     65   }
     66 }
     67 
     68 template <typename Visitor>
     69 inline void ImageHeader::VisitPackedImtConflictTables(const Visitor& visitor,
     70                                                       uint8_t* base,
     71                                                       PointerSize pointer_size) const {
     72   const ImageSection& section = GetImageSection(kSectionIMTConflictTables);
     73   for (size_t pos = 0; pos < section.Size(); ) {
     74     auto* table = reinterpret_cast<ImtConflictTable*>(base + section.Offset() + pos);
     75     table->Visit([&visitor](const std::pair<ArtMethod*, ArtMethod*>& methods) {
     76       return std::make_pair(visitor(methods.first), visitor(methods.second));
     77     }, pointer_size);
     78     pos += table->ComputeSize(pointer_size);
     79   }
     80 }
     81 
     82 }  // namespace art
     83 
     84 #endif  // ART_RUNTIME_IMAGE_INL_H_
     85