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, size_t initial_size, size_t growth_limit, 42 size_t capacity, uint8_t* requested_begin, bool low_memory_mode, 43 bool can_move_objects); 44 static RosAllocSpace* CreateFromMemMap(MemMap* mem_map, const std::string& name, 45 size_t starting_size, size_t initial_size, 46 size_t growth_limit, size_t capacity, 47 bool low_memory_mode, bool can_move_objects); 48 49 mirror::Object* AllocWithGrowth(Thread* self, size_t num_bytes, size_t* bytes_allocated, 50 size_t* usable_size, size_t* bytes_tl_bulk_allocated) 51 OVERRIDE REQUIRES(!lock_); 52 mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated, 53 size_t* usable_size, size_t* bytes_tl_bulk_allocated) OVERRIDE { 54 return AllocNonvirtual(self, num_bytes, bytes_allocated, usable_size, 55 bytes_tl_bulk_allocated); 56 } 57 mirror::Object* AllocThreadUnsafe(Thread* self, size_t num_bytes, size_t* bytes_allocated, 58 size_t* usable_size, size_t* bytes_tl_bulk_allocated) 59 OVERRIDE REQUIRES(Locks::mutator_lock_) { 60 return AllocNonvirtualThreadUnsafe(self, num_bytes, bytes_allocated, usable_size, 61 bytes_tl_bulk_allocated); 62 } 63 size_t AllocationSize(mirror::Object* obj, size_t* usable_size) OVERRIDE { 64 return AllocationSizeNonvirtual<true>(obj, usable_size); 65 } 66 size_t Free(Thread* self, mirror::Object* ptr) OVERRIDE 67 REQUIRES_SHARED(Locks::mutator_lock_); 68 size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) OVERRIDE 69 REQUIRES_SHARED(Locks::mutator_lock_); 70 71 mirror::Object* AllocNonvirtual(Thread* self, size_t num_bytes, size_t* bytes_allocated, 72 size_t* usable_size, size_t* bytes_tl_bulk_allocated) { 73 // RosAlloc zeroes memory internally. 74 return AllocCommon(self, num_bytes, bytes_allocated, usable_size, 75 bytes_tl_bulk_allocated); 76 } 77 mirror::Object* AllocNonvirtualThreadUnsafe(Thread* self, size_t num_bytes, 78 size_t* bytes_allocated, size_t* usable_size, 79 size_t* bytes_tl_bulk_allocated) { 80 // RosAlloc zeroes memory internally. Pass in false for thread unsafe. 81 return AllocCommon<false>(self, num_bytes, bytes_allocated, usable_size, 82 bytes_tl_bulk_allocated); 83 } 84 85 // Returns true if the given allocation request can be allocated in 86 // an existing thread local run without allocating a new run. 87 ALWAYS_INLINE bool CanAllocThreadLocal(Thread* self, size_t num_bytes); 88 // Allocate the given allocation request in an existing thread local 89 // run without allocating a new run. 90 ALWAYS_INLINE mirror::Object* AllocThreadLocal(Thread* self, size_t num_bytes, 91 size_t* bytes_allocated); 92 size_t MaxBytesBulkAllocatedFor(size_t num_bytes) OVERRIDE { 93 return MaxBytesBulkAllocatedForNonvirtual(num_bytes); 94 } 95 ALWAYS_INLINE size_t MaxBytesBulkAllocatedForNonvirtual(size_t num_bytes); 96 97 // TODO: NO_THREAD_SAFETY_ANALYSIS because SizeOf() requires that mutator_lock is held. 98 template<bool kMaybeIsRunningOnMemoryTool> 99 size_t AllocationSizeNonvirtual(mirror::Object* obj, size_t* usable_size) 100 NO_THREAD_SAFETY_ANALYSIS; 101 102 allocator::RosAlloc* GetRosAlloc() const { 103 return rosalloc_; 104 } 105 106 size_t Trim() OVERRIDE; 107 void Walk(WalkCallback callback, void* arg) OVERRIDE REQUIRES(!lock_); 108 size_t GetFootprint() OVERRIDE; 109 size_t GetFootprintLimit() OVERRIDE; 110 void SetFootprintLimit(size_t limit) OVERRIDE; 111 112 void Clear() OVERRIDE; 113 114 MallocSpace* CreateInstance(MemMap* mem_map, const std::string& name, void* allocator, 115 uint8_t* begin, uint8_t* end, uint8_t* limit, size_t growth_limit, 116 bool can_move_objects) OVERRIDE; 117 118 uint64_t GetBytesAllocated() OVERRIDE; 119 uint64_t GetObjectsAllocated() OVERRIDE; 120 121 size_t RevokeThreadLocalBuffers(Thread* thread); 122 size_t RevokeAllThreadLocalBuffers(); 123 void AssertThreadLocalBuffersAreRevoked(Thread* thread); 124 void AssertAllThreadLocalBuffersAreRevoked(); 125 126 // Returns the class of a recently freed object. 127 mirror::Class* FindRecentFreedObject(const mirror::Object* obj); 128 129 bool IsRosAllocSpace() const OVERRIDE { 130 return true; 131 } 132 133 RosAllocSpace* AsRosAllocSpace() OVERRIDE { 134 return this; 135 } 136 137 void Verify() REQUIRES(Locks::mutator_lock_) { 138 rosalloc_->Verify(); 139 } 140 141 virtual ~RosAllocSpace(); 142 143 void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) OVERRIDE { 144 rosalloc_->LogFragmentationAllocFailure(os, failed_alloc_bytes); 145 } 146 147 void DumpStats(std::ostream& os); 148 149 protected: 150 RosAllocSpace(MemMap* mem_map, size_t initial_size, const std::string& name, 151 allocator::RosAlloc* rosalloc, uint8_t* begin, uint8_t* end, uint8_t* limit, 152 size_t growth_limit, bool can_move_objects, size_t starting_size, 153 bool low_memory_mode); 154 155 private: 156 template<bool kThreadSafe = true> 157 mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated, 158 size_t* usable_size, size_t* bytes_tl_bulk_allocated); 159 160 void* CreateAllocator(void* base, size_t morecore_start, size_t initial_size, 161 size_t maximum_size, bool low_memory_mode) OVERRIDE { 162 return CreateRosAlloc(base, morecore_start, initial_size, maximum_size, low_memory_mode, 163 RUNNING_ON_MEMORY_TOOL != 0); 164 } 165 static allocator::RosAlloc* CreateRosAlloc(void* base, size_t morecore_start, size_t initial_size, 166 size_t maximum_size, bool low_memory_mode, 167 bool running_on_memory_tool); 168 169 void InspectAllRosAlloc(void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 170 void* arg, bool do_null_callback_at_end) 171 REQUIRES(!Locks::runtime_shutdown_lock_, !Locks::thread_list_lock_); 172 void InspectAllRosAllocWithSuspendAll( 173 void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 174 void* arg, bool do_null_callback_at_end) 175 REQUIRES(!Locks::runtime_shutdown_lock_, !Locks::thread_list_lock_); 176 177 // Underlying rosalloc. 178 allocator::RosAlloc* rosalloc_; 179 180 const bool low_memory_mode_; 181 182 friend class collector::MarkSweep; 183 184 DISALLOW_COPY_AND_ASSIGN(RosAllocSpace); 185 }; 186 187 } // namespace space 188 } // namespace gc 189 } // namespace art 190 191 #endif // ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_ 192
