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 ValgrindMallocSpace. 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, byte* 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) OVERRIDE LOCKS_EXCLUDED(lock_); 51 mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated, 52 size_t* usable_size) OVERRIDE { 53 return AllocNonvirtual(self, num_bytes, bytes_allocated, usable_size); 54 } 55 mirror::Object* AllocThreadUnsafe(Thread* self, size_t num_bytes, size_t* bytes_allocated, 56 size_t* usable_size) 57 OVERRIDE EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_) { 58 return AllocNonvirtualThreadUnsafe(self, num_bytes, bytes_allocated, usable_size); 59 } 60 size_t AllocationSize(mirror::Object* obj, size_t* usable_size) OVERRIDE { 61 return AllocationSizeNonvirtual(obj, usable_size); 62 } 63 size_t Free(Thread* self, mirror::Object* ptr) OVERRIDE 64 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 65 size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) OVERRIDE 66 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 67 68 mirror::Object* AllocNonvirtual(Thread* self, size_t num_bytes, size_t* bytes_allocated, 69 size_t* usable_size) { 70 // RosAlloc zeroes memory internally. 71 return AllocCommon(self, num_bytes, bytes_allocated, usable_size); 72 } 73 mirror::Object* AllocNonvirtualThreadUnsafe(Thread* self, size_t num_bytes, 74 size_t* bytes_allocated, size_t* usable_size) { 75 // RosAlloc zeroes memory internally. Pass in false for thread unsafe. 76 return AllocCommon<false>(self, num_bytes, bytes_allocated, usable_size); 77 } 78 79 // TODO: NO_THREAD_SAFETY_ANALYSIS because SizeOf() requires that mutator_lock is held. 80 size_t AllocationSizeNonvirtual(mirror::Object* obj, size_t* usable_size) 81 NO_THREAD_SAFETY_ANALYSIS; 82 83 allocator::RosAlloc* GetRosAlloc() const { 84 return rosalloc_; 85 } 86 87 size_t Trim() OVERRIDE; 88 void Walk(WalkCallback callback, void* arg) OVERRIDE LOCKS_EXCLUDED(lock_); 89 size_t GetFootprint() OVERRIDE; 90 size_t GetFootprintLimit() OVERRIDE; 91 void SetFootprintLimit(size_t limit) OVERRIDE; 92 93 void Clear() OVERRIDE; 94 95 MallocSpace* CreateInstance(const std::string& name, MemMap* mem_map, void* allocator, 96 byte* begin, byte* end, byte* limit, size_t growth_limit, 97 bool can_move_objects) OVERRIDE; 98 99 uint64_t GetBytesAllocated() OVERRIDE; 100 uint64_t GetObjectsAllocated() OVERRIDE; 101 102 void RevokeThreadLocalBuffers(Thread* thread); 103 void RevokeAllThreadLocalBuffers(); 104 void AssertAllThreadLocalBuffersAreRevoked(); 105 106 // Returns the class of a recently freed object. 107 mirror::Class* FindRecentFreedObject(const mirror::Object* obj); 108 109 bool IsRosAllocSpace() const OVERRIDE { 110 return true; 111 } 112 113 RosAllocSpace* AsRosAllocSpace() OVERRIDE { 114 return this; 115 } 116 117 void Verify() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_) { 118 rosalloc_->Verify(); 119 } 120 121 virtual ~RosAllocSpace(); 122 123 void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) OVERRIDE { 124 rosalloc_->LogFragmentationAllocFailure(os, failed_alloc_bytes); 125 } 126 127 protected: 128 RosAllocSpace(const std::string& name, MemMap* mem_map, allocator::RosAlloc* rosalloc, 129 byte* begin, byte* end, byte* limit, size_t growth_limit, bool can_move_objects, 130 size_t starting_size, size_t initial_size, bool low_memory_mode); 131 132 private: 133 template<bool kThreadSafe = true> 134 mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated, 135 size_t* usable_size); 136 137 void* CreateAllocator(void* base, size_t morecore_start, size_t initial_size, 138 size_t maximum_size, bool low_memory_mode) OVERRIDE { 139 return CreateRosAlloc(base, morecore_start, initial_size, maximum_size, low_memory_mode); 140 } 141 static allocator::RosAlloc* CreateRosAlloc(void* base, size_t morecore_start, size_t initial_size, 142 size_t maximum_size, bool low_memory_mode); 143 144 void InspectAllRosAlloc(void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 145 void* arg, bool do_null_callback_at_end) 146 LOCKS_EXCLUDED(Locks::runtime_shutdown_lock_, Locks::thread_list_lock_); 147 void InspectAllRosAllocWithSuspendAll( 148 void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 149 void* arg, bool do_null_callback_at_end) 150 LOCKS_EXCLUDED(Locks::runtime_shutdown_lock_, Locks::thread_list_lock_); 151 152 // Underlying rosalloc. 153 allocator::RosAlloc* rosalloc_; 154 155 const bool low_memory_mode_; 156 157 friend class collector::MarkSweep; 158 159 DISALLOW_COPY_AND_ASSIGN(RosAllocSpace); 160 }; 161 162 } // namespace space 163 } // namespace gc 164 } // namespace art 165 166 #endif // ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_ 167
