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      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/length_prefixed_array.h"
     24 #include "base/macros.h"
     25 #include "utils/array_ref.h"
     26 #include "utils/dedupe_set.h"
     27 #include "utils/swap_space.h"
     28 
     29 namespace art {
     30 
     31 class LinkerPatch;
     32 class SrcMapElem;
     33 
     34 class CompiledMethodStorage {
     35  public:
     36   explicit CompiledMethodStorage(int swap_fd);
     37   ~CompiledMethodStorage();
     38 
     39   void DumpMemoryUsage(std::ostream& os, bool extended) const;
     40 
     41   void SetDedupeEnabled(bool dedupe_enabled) {
     42     dedupe_enabled_ = dedupe_enabled;
     43   }
     44   bool DedupeEnabled() const {
     45     return dedupe_enabled_;
     46   }
     47 
     48   SwapAllocator<void> GetSwapSpaceAllocator() {
     49     return SwapAllocator<void>(swap_space_.get());
     50   }
     51 
     52   const LengthPrefixedArray<uint8_t>* DeduplicateCode(const ArrayRef<const uint8_t>& code);
     53   void ReleaseCode(const LengthPrefixedArray<uint8_t>* code);
     54 
     55   const LengthPrefixedArray<SrcMapElem>* DeduplicateSrcMappingTable(
     56       const ArrayRef<const SrcMapElem>& src_map);
     57   void ReleaseSrcMappingTable(const LengthPrefixedArray<SrcMapElem>* src_map);
     58 
     59   const LengthPrefixedArray<uint8_t>* DeduplicateVMapTable(const ArrayRef<const uint8_t>& table);
     60   void ReleaseVMapTable(const LengthPrefixedArray<uint8_t>* table);
     61 
     62   const LengthPrefixedArray<uint8_t>* DeduplicateCFIInfo(const ArrayRef<const uint8_t>& cfi_info);
     63   void ReleaseCFIInfo(const LengthPrefixedArray<uint8_t>* cfi_info);
     64 
     65   const LengthPrefixedArray<LinkerPatch>* DeduplicateLinkerPatches(
     66       const ArrayRef<const LinkerPatch>& linker_patches);
     67   void ReleaseLinkerPatches(const LengthPrefixedArray<LinkerPatch>* linker_patches);
     68 
     69  private:
     70   template <typename T, typename DedupeSetType>
     71   const LengthPrefixedArray<T>* AllocateOrDeduplicateArray(const ArrayRef<const T>& data,
     72                                                            DedupeSetType* dedupe_set);
     73 
     74   template <typename T>
     75   void ReleaseArrayIfNotDeduplicated(const LengthPrefixedArray<T>* array);
     76 
     77   // DeDuplication data structures.
     78   template <typename ContentType>
     79   class DedupeHashFunc;
     80 
     81   template <typename T>
     82   class LengthPrefixedArrayAlloc;
     83 
     84   template <typename T>
     85   using ArrayDedupeSet = DedupeSet<ArrayRef<const T>,
     86                                    LengthPrefixedArray<T>,
     87                                    LengthPrefixedArrayAlloc<T>,
     88                                    size_t,
     89                                    DedupeHashFunc<const T>,
     90                                    4>;
     91 
     92   // Swap pool and allocator used for native allocations. May be file-backed. Needs to be first
     93   // as other fields rely on this.
     94   std::unique_ptr<SwapSpace> swap_space_;
     95 
     96   bool dedupe_enabled_;
     97 
     98   ArrayDedupeSet<uint8_t> dedupe_code_;
     99   ArrayDedupeSet<SrcMapElem> dedupe_src_mapping_table_;
    100   ArrayDedupeSet<uint8_t> dedupe_vmap_table_;
    101   ArrayDedupeSet<uint8_t> dedupe_cfi_info_;
    102   ArrayDedupeSet<LinkerPatch> dedupe_linker_patches_;
    103 
    104   DISALLOW_COPY_AND_ASSIGN(CompiledMethodStorage);
    105 };
    106 
    107 }  // namespace art
    108 
    109 #endif  // ART_COMPILER_DRIVER_COMPILED_METHOD_STORAGE_H_
    110