1 /* 2 * Copyright (C) 2013 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_ROSALLOC_SPACE_H_ 18 #define ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_ 19 20 #include "gc/allocator/rosalloc.h" 21 #include "malloc_space.h" 22 #include "space.h" 23 24 namespace art { 25 namespace gc { 26 27 namespace collector { 28 class MarkSweep; 29 } // namespace collector 30 31 namespace space { 32 33 // An alloc space implemented using a runs-of-slots memory allocator. Not final as may be 34 // overridden by a MemoryToolMallocSpace. 35 class RosAllocSpace : public MallocSpace { 36 public: 37 // Create a RosAllocSpace with the requested sizes. The requested 38 // base address is not guaranteed to be granted, if it is required, 39 // the caller should call Begin on the returned space to confirm the 40 // request was granted. 41 static RosAllocSpace* Create(const std::string& name, 42 size_t initial_size, 43 size_t growth_limit, 44 size_t capacity, 45 bool low_memory_mode, 46 bool can_move_objects); 47 static RosAllocSpace* CreateFromMemMap(MemMap&& mem_map, 48 const std::string& name, 49 size_t starting_size, 50 size_t initial_size, 51 size_t growth_limit, 52 size_t capacity, 53 bool low_memory_mode, 54 bool can_move_objects); 55 56 mirror::Object* AllocWithGrowth(Thread* self, size_t num_bytes, size_t* bytes_allocated, 57 size_t* usable_size, size_t* bytes_tl_bulk_allocated) 58 override REQUIRES(!lock_); 59 mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated, 60 size_t* usable_size, size_t* bytes_tl_bulk_allocated) override { 61 return AllocNonvirtual(self, num_bytes, bytes_allocated, usable_size, 62 bytes_tl_bulk_allocated); 63 } 64 mirror::Object* AllocThreadUnsafe(Thread* self, size_t num_bytes, size_t* bytes_allocated, 65 size_t* usable_size, size_t* bytes_tl_bulk_allocated) 66 override REQUIRES(Locks::mutator_lock_) { 67 return AllocNonvirtualThreadUnsafe(self, num_bytes, bytes_allocated, usable_size, 68 bytes_tl_bulk_allocated); 69 } 70 size_t AllocationSize(mirror::Object* obj, size_t* usable_size) override { 71 return AllocationSizeNonvirtual<true>(obj, usable_size); 72 } 73 size_t Free(Thread* self, mirror::Object* ptr) override 74 REQUIRES_SHARED(Locks::mutator_lock_); 75 size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) override 76 REQUIRES_SHARED(Locks::mutator_lock_); 77 78 mirror::Object* AllocNonvirtual(Thread* self, size_t num_bytes, size_t* bytes_allocated, 79 size_t* usable_size, size_t* bytes_tl_bulk_allocated) { 80 // RosAlloc zeroes memory internally. 81 return AllocCommon(self, num_bytes, bytes_allocated, usable_size, 82 bytes_tl_bulk_allocated); 83 } 84 mirror::Object* AllocNonvirtualThreadUnsafe(Thread* self, size_t num_bytes, 85 size_t* bytes_allocated, size_t* usable_size, 86 size_t* bytes_tl_bulk_allocated) { 87 // RosAlloc zeroes memory internally. Pass in false for thread unsafe. 88 return AllocCommon<false>(self, num_bytes, bytes_allocated, usable_size, 89 bytes_tl_bulk_allocated); 90 } 91 92 // Returns true if the given allocation request can be allocated in 93 // an existing thread local run without allocating a new run. 94 ALWAYS_INLINE bool CanAllocThreadLocal(Thread* self, size_t num_bytes); 95 // Allocate the given allocation request in an existing thread local 96 // run without allocating a new run. 97 ALWAYS_INLINE mirror::Object* AllocThreadLocal(Thread* self, size_t num_bytes, 98 size_t* bytes_allocated); 99 size_t MaxBytesBulkAllocatedFor(size_t num_bytes) override { 100 return MaxBytesBulkAllocatedForNonvirtual(num_bytes); 101 } 102 ALWAYS_INLINE size_t MaxBytesBulkAllocatedForNonvirtual(size_t num_bytes); 103 104 // TODO: NO_THREAD_SAFETY_ANALYSIS because SizeOf() requires that mutator_lock is held. 105 template<bool kMaybeIsRunningOnMemoryTool> 106 size_t AllocationSizeNonvirtual(mirror::Object* obj, size_t* usable_size) 107 NO_THREAD_SAFETY_ANALYSIS; 108 109 allocator::RosAlloc* GetRosAlloc() const { 110 return rosalloc_; 111 } 112 113 size_t Trim() override; 114 void Walk(WalkCallback callback, void* arg) override REQUIRES(!lock_); 115 size_t GetFootprint() override; 116 size_t GetFootprintLimit() override; 117 void SetFootprintLimit(size_t limit) override; 118 119 void Clear() override; 120 121 MallocSpace* CreateInstance(MemMap&& mem_map, 122 const std::string& name, 123 void* allocator, 124 uint8_t* begin, 125 uint8_t* end, 126 uint8_t* limit, 127 size_t growth_limit, 128 bool can_move_objects) override; 129 130 uint64_t GetBytesAllocated() override; 131 uint64_t GetObjectsAllocated() override; 132 133 size_t RevokeThreadLocalBuffers(Thread* thread) override; 134 size_t RevokeAllThreadLocalBuffers() override; 135 void AssertThreadLocalBuffersAreRevoked(Thread* thread); 136 void AssertAllThreadLocalBuffersAreRevoked(); 137 138 // Returns the class of a recently freed object. 139 mirror::Class* FindRecentFreedObject(const mirror::Object* obj); 140 141 bool IsRosAllocSpace() const override { 142 return true; 143 } 144 145 RosAllocSpace* AsRosAllocSpace() override { 146 return this; 147 } 148 149 void Verify() REQUIRES(Locks::mutator_lock_) { 150 rosalloc_->Verify(); 151 } 152 153 virtual ~RosAllocSpace(); 154 155 void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) override { 156 rosalloc_->LogFragmentationAllocFailure(os, failed_alloc_bytes); 157 } 158 159 void DumpStats(std::ostream& os); 160 161 protected: 162 RosAllocSpace(MemMap&& mem_map, 163 size_t initial_size, 164 const std::string& name, 165 allocator::RosAlloc* rosalloc, 166 uint8_t* begin, 167 uint8_t* end, 168 uint8_t* limit, 169 size_t growth_limit, 170 bool can_move_objects, 171 size_t starting_size, 172 bool low_memory_mode); 173 174 private: 175 template<bool kThreadSafe = true> 176 mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated, 177 size_t* usable_size, size_t* bytes_tl_bulk_allocated); 178 179 void* CreateAllocator(void* base, size_t morecore_start, size_t initial_size, 180 size_t maximum_size, bool low_memory_mode) override { 181 return CreateRosAlloc( 182 base, morecore_start, initial_size, maximum_size, low_memory_mode, kRunningOnMemoryTool); 183 } 184 static allocator::RosAlloc* CreateRosAlloc(void* base, size_t morecore_start, size_t initial_size, 185 size_t maximum_size, bool low_memory_mode, 186 bool running_on_memory_tool); 187 188 void InspectAllRosAlloc(void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 189 void* arg, bool do_null_callback_at_end) 190 REQUIRES(!Locks::runtime_shutdown_lock_, !Locks::thread_list_lock_); 191 void InspectAllRosAllocWithSuspendAll( 192 void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 193 void* arg, bool do_null_callback_at_end) 194 REQUIRES(!Locks::runtime_shutdown_lock_, !Locks::thread_list_lock_); 195 196 // Underlying rosalloc. 197 allocator::RosAlloc* rosalloc_; 198 199 const bool low_memory_mode_; 200 201 friend class collector::MarkSweep; 202 203 DISALLOW_COPY_AND_ASSIGN(RosAllocSpace); 204 }; 205 206 } // namespace space 207 } // namespace gc 208 } // namespace art 209 210 #endif // ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_ 211
