1 /* 2 * Copyright (C) 2014 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_GC_SPACE_ZYGOTE_SPACE_H_ 18 #define ART_RUNTIME_GC_SPACE_ZYGOTE_SPACE_H_ 19 20 #include "base/mem_map.h" 21 #include "gc/accounting/space_bitmap.h" 22 #include "malloc_space.h" 23 24 namespace art { 25 namespace gc { 26 27 namespace space { 28 29 // A zygote space is a space which you cannot allocate into or free from. 30 class ZygoteSpace final : public ContinuousMemMapAllocSpace { 31 public: 32 // Returns the remaining storage in the out_map field. 33 static ZygoteSpace* Create(const std::string& name, 34 MemMap&& mem_map, 35 accounting::ContinuousSpaceBitmap* live_bitmap, 36 accounting::ContinuousSpaceBitmap* mark_bitmap) 37 REQUIRES_SHARED(Locks::mutator_lock_); 38 39 void Dump(std::ostream& os) const override; 40 GetType()41 SpaceType GetType() const override { 42 return kSpaceTypeZygoteSpace; 43 } 44 AsZygoteSpace()45 ZygoteSpace* AsZygoteSpace() override { 46 return this; 47 } 48 49 mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated, 50 size_t* usable_size, size_t* bytes_tl_bulk_allocated) override; 51 52 size_t AllocationSize(mirror::Object* obj, size_t* usable_size) override; 53 54 size_t Free(Thread* self, mirror::Object* ptr) override; 55 56 size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) override; 57 58 // ZygoteSpaces don't have thread local state. RevokeThreadLocalBuffers(art::Thread *)59 size_t RevokeThreadLocalBuffers(art::Thread*) override { 60 return 0U; 61 } RevokeAllThreadLocalBuffers()62 size_t RevokeAllThreadLocalBuffers() override { 63 return 0U; 64 } 65 GetBytesAllocated()66 uint64_t GetBytesAllocated() override { 67 return Size(); 68 } 69 GetObjectsAllocated()70 uint64_t GetObjectsAllocated() override { 71 return objects_allocated_.load(); 72 } 73 74 void Clear() override; 75 CanMoveObjects()76 bool CanMoveObjects() const override { 77 return false; 78 } 79 80 void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) override 81 REQUIRES_SHARED(Locks::mutator_lock_); 82 83 protected: GetSweepCallback()84 accounting::ContinuousSpaceBitmap::SweepCallback* GetSweepCallback() override { 85 return &SweepCallback; 86 } 87 88 private: 89 ZygoteSpace(const std::string& name, MemMap&& mem_map, size_t objects_allocated); 90 static void SweepCallback(size_t num_ptrs, mirror::Object** ptrs, void* arg); 91 92 AtomicInteger objects_allocated_; 93 94 friend class Space; 95 DISALLOW_COPY_AND_ASSIGN(ZygoteSpace); 96 }; 97 98 } // namespace space 99 } // namespace gc 100 } // namespace art 101 102 #endif // ART_RUNTIME_GC_SPACE_ZYGOTE_SPACE_H_ 103