rosalloc_space.h revision 661974a5561e5ccdfbac8cb5d8df8b7e6f3483b8
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 24namespace art { 25namespace gc { 26 27namespace collector { 28 class MarkSweep; 29} // namespace collector 30 31namespace space { 32 33// An alloc space implemented using a runs-of-slots memory allocator. Not final as may be 34// overridden by a ValgrindMallocSpace. 35class 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 static RosAllocSpace* CreateFromMemMap(MemMap* mem_map, const std::string& name, 44 size_t starting_size, size_t initial_size, 45 size_t growth_limit, size_t capacity, 46 bool low_memory_mode); 47 48 mirror::Object* AllocWithGrowth(Thread* self, size_t num_bytes, size_t* bytes_allocated, 49 size_t* usable_size) OVERRIDE LOCKS_EXCLUDED(lock_); 50 mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated, 51 size_t* usable_size) OVERRIDE { 52 return AllocNonvirtual(self, num_bytes, bytes_allocated, usable_size); 53 } 54 size_t AllocationSize(mirror::Object* obj, size_t* usable_size) OVERRIDE { 55 return AllocationSizeNonvirtual(obj, usable_size); 56 } 57 size_t Free(Thread* self, mirror::Object* ptr) OVERRIDE 58 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 59 size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) OVERRIDE 60 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 61 62 mirror::Object* AllocNonvirtual(Thread* self, size_t num_bytes, size_t* bytes_allocated, 63 size_t* usable_size) { 64 // RosAlloc zeroes memory internally. 65 return AllocCommon(self, num_bytes, bytes_allocated, usable_size); 66 } 67 68 // TODO: NO_THREAD_SAFETY_ANALYSIS because SizeOf() requires that mutator_lock is held. 69 size_t AllocationSizeNonvirtual(mirror::Object* obj, size_t* usable_size) 70 NO_THREAD_SAFETY_ANALYSIS; 71 72 allocator::RosAlloc* GetRosAlloc() const { 73 return rosalloc_; 74 } 75 76 size_t Trim() OVERRIDE; 77 void Walk(WalkCallback callback, void* arg) OVERRIDE LOCKS_EXCLUDED(lock_); 78 size_t GetFootprint() OVERRIDE; 79 size_t GetFootprintLimit() OVERRIDE; 80 void SetFootprintLimit(size_t limit) OVERRIDE; 81 82 void Clear() OVERRIDE; 83 void Reset() OVERRIDE; 84 MallocSpace* CreateInstance(const std::string& name, MemMap* mem_map, void* allocator, 85 byte* begin, byte* end, byte* limit, size_t growth_limit); 86 87 uint64_t GetBytesAllocated() OVERRIDE; 88 uint64_t GetObjectsAllocated() OVERRIDE; 89 90 void RevokeThreadLocalBuffers(Thread* thread); 91 void RevokeAllThreadLocalBuffers(); 92 93 // Returns the class of a recently freed object. 94 mirror::Class* FindRecentFreedObject(const mirror::Object* obj); 95 96 bool IsRosAllocSpace() const OVERRIDE { 97 return true; 98 } 99 100 RosAllocSpace* AsRosAllocSpace() OVERRIDE { 101 return this; 102 } 103 104 void Verify() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_) { 105 rosalloc_->Verify(); 106 } 107 108 virtual ~RosAllocSpace(); 109 110 protected: 111 RosAllocSpace(const std::string& name, MemMap* mem_map, allocator::RosAlloc* rosalloc, 112 byte* begin, byte* end, byte* limit, size_t growth_limit); 113 114 private: 115 mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated, 116 size_t* usable_size); 117 118 void* CreateAllocator(void* base, size_t morecore_start, size_t initial_size, 119 size_t maximum_size, bool low_memory_mode) OVERRIDE { 120 return CreateRosAlloc(base, morecore_start, initial_size, maximum_size, low_memory_mode); 121 } 122 static allocator::RosAlloc* CreateRosAlloc(void* base, size_t morecore_start, size_t initial_size, 123 size_t maximum_size, bool low_memory_mode); 124 125 void InspectAllRosAlloc(void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg), 126 void* arg) 127 LOCKS_EXCLUDED(Locks::runtime_shutdown_lock_, Locks::thread_list_lock_); 128 129 // Underlying rosalloc. 130 allocator::RosAlloc* const rosalloc_; 131 132 friend class collector::MarkSweep; 133 134 DISALLOW_COPY_AND_ASSIGN(RosAllocSpace); 135}; 136 137} // namespace space 138} // namespace gc 139} // namespace art 140 141#endif // ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_ 142