| /* |
| * Copyright (C) 2011 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_RUNTIME_GC_SPACE_IMAGE_SPACE_H_ |
| #define ART_RUNTIME_GC_SPACE_IMAGE_SPACE_H_ |
| |
| #include "space.h" |
| |
| namespace art { |
| |
| class OatFile; |
| |
| namespace gc { |
| namespace space { |
| |
| // An image space is a space backed with a memory mapped image. |
| class ImageSpace : public MemMapSpace { |
| public: |
| bool CanAllocateInto() const { |
| return false; |
| } |
| |
| SpaceType GetType() const { |
| return kSpaceTypeImageSpace; |
| } |
| |
| // Create a Space from an image file. Cannot be used for future |
| // allocation or collected. |
| // |
| // Create also opens the OatFile associated with the image file so |
| // that it be contiguously allocated with the image before the |
| // creation of the alloc space. The ReleaseOatFile will later be |
| // used to transfer ownership of the OatFile to the ClassLinker when |
| // it is initialized. |
| static ImageSpace* Create(const std::string& image) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| // Releases the OatFile from the ImageSpace so it can be transfer to |
| // the caller, presumably the ClassLinker. |
| OatFile& ReleaseOatFile() |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| const ImageHeader& GetImageHeader() const { |
| return *reinterpret_cast<ImageHeader*>(Begin()); |
| } |
| |
| const std::string GetImageFilename() const { |
| return GetName(); |
| } |
| |
| // Mark the objects defined in this space in the given live bitmap |
| void RecordImageAllocations(accounting::SpaceBitmap* live_bitmap) const |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| accounting::SpaceBitmap* GetLiveBitmap() const { |
| return live_bitmap_.get(); |
| } |
| |
| accounting::SpaceBitmap* GetMarkBitmap() const { |
| // ImageSpaces have the same bitmap for both live and marked. This helps reduce the number of |
| // special cases to test against. |
| return live_bitmap_.get(); |
| } |
| |
| void Dump(std::ostream& os) const; |
| |
| private: |
| |
| // Tries to initialize an ImageSpace from the given image path, |
| // returning NULL on error. |
| // |
| // If validate_oat_file is false (for /system), do not verify that |
| // image's OatFile is up-to-date relative to its DexFile |
| // inputs. Otherwise (for /data), validate the inputs and generate |
| // the OatFile in /data/dalvik-cache if necessary. |
| static ImageSpace* Init(const std::string& image, bool validate_oat_file) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| OatFile* OpenOatFile() const |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| bool ValidateOatFile() const |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| friend class Space; |
| |
| static size_t bitmap_index_; |
| |
| UniquePtr<accounting::SpaceBitmap> live_bitmap_; |
| |
| ImageSpace(const std::string& name, MemMap* mem_map); |
| |
| // The OatFile associated with the image during early startup to |
| // reserve space contiguous to the image. It is later released to |
| // the ClassLinker during it's initialization. |
| UniquePtr<OatFile> oat_file_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ImageSpace); |
| }; |
| |
| } // namespace space |
| } // namespace gc |
| } // namespace art |
| |
| #endif // ART_RUNTIME_GC_SPACE_IMAGE_SPACE_H_ |