Home | History | Annotate | Download | only in driver 
      1 /*
      2  * Copyright (C) 2015 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_DRIVER_COMPILED_METHOD_STORAGE_H_
     18 #define ART_COMPILER_DRIVER_COMPILED_METHOD_STORAGE_H_
     19 
     20 #include <iosfwd>
     21 #include <memory>
     22 
     23 #include "base/array_ref.h"
     24 #include "base/length_prefixed_array.h"
     25 #include "base/macros.h"
     26 #include "utils/dedupe_set.h"
     27 #include "utils/swap_space.h"
     28 
     29 namespace art {
     30 
     31 class LinkerPatch;
     32 
     33 class CompiledMethodStorage {
     34  public:
     35   explicit CompiledMethodStorage(int swap_fd);
     36   ~CompiledMethodStorage();
     37 
     38   void DumpMemoryUsage(std::ostream& os, bool extended) const;
     39 
     40   void SetDedupeEnabled(bool dedupe_enabled) {
     41     dedupe_enabled_ = dedupe_enabled;
     42   }
     43   bool DedupeEnabled() const {
     44     return dedupe_enabled_;
     45   }
     46 
     47   SwapAllocator<void> GetSwapSpaceAllocator() {
     48     return SwapAllocator<void>(swap_space_.get());
     49   }
     50 
     51   const LengthPrefixedArray<uint8_t>* DeduplicateCode(const ArrayRef<const uint8_t>& code);
     52   void ReleaseCode(const LengthPrefixedArray<uint8_t>* code);
     53 
     54   const LengthPrefixedArray<uint8_t>* DeduplicateMethodInfo(
     55       const ArrayRef<const uint8_t>& method_info);
     56   void ReleaseMethodInfo(const LengthPrefixedArray<uint8_t>* method_info);
     57 
     58   const LengthPrefixedArray<uint8_t>* DeduplicateVMapTable(const ArrayRef<const uint8_t>& table);
     59   void ReleaseVMapTable(const LengthPrefixedArray<uint8_t>* table);
     60 
     61   const LengthPrefixedArray<uint8_t>* DeduplicateCFIInfo(const ArrayRef<const uint8_t>& cfi_info);
     62   void ReleaseCFIInfo(const LengthPrefixedArray<uint8_t>* cfi_info);
     63 
     64   const LengthPrefixedArray<LinkerPatch>* DeduplicateLinkerPatches(
     65       const ArrayRef<const LinkerPatch>& linker_patches);
     66   void ReleaseLinkerPatches(const LengthPrefixedArray<LinkerPatch>* linker_patches);
     67 
     68  private:
     69   template <typename T, typename DedupeSetType>
     70   const LengthPrefixedArray<T>* AllocateOrDeduplicateArray(const ArrayRef<const T>& data,
     71                                                            DedupeSetType* dedupe_set);
     72 
     73   template <typename T>
     74   void ReleaseArrayIfNotDeduplicated(const LengthPrefixedArray<T>* array);
     75 
     76   // DeDuplication data structures.
     77   template <typename ContentType>
     78   class DedupeHashFunc;
     79 
     80   template <typename T>
     81   class LengthPrefixedArrayAlloc;
     82 
     83   template <typename T>
     84   using ArrayDedupeSet = DedupeSet<ArrayRef<const T>,
     85                                    LengthPrefixedArray<T>,
     86                                    LengthPrefixedArrayAlloc<T>,
     87                                    size_t,
     88                                    DedupeHashFunc<const T>,
     89                                    4>;
     90 
     91   // Swap pool and allocator used for native allocations. May be file-backed. Needs to be first
     92   // as other fields rely on this.
     93   std::unique_ptr<SwapSpace> swap_space_;
     94 
     95   bool dedupe_enabled_;
     96 
     97   ArrayDedupeSet<uint8_t> dedupe_code_;
     98   ArrayDedupeSet<uint8_t> dedupe_method_info_;
     99   ArrayDedupeSet<uint8_t> dedupe_vmap_table_;
    100   ArrayDedupeSet<uint8_t> dedupe_cfi_info_;
    101   ArrayDedupeSet<LinkerPatch> dedupe_linker_patches_;
    102 
    103   DISALLOW_COPY_AND_ASSIGN(CompiledMethodStorage);
    104 };
    105 
    106 }  // namespace art
    107 
    108 #endif  // ART_COMPILER_DRIVER_COMPILED_METHOD_STORAGE_H_
    109