rosalloc_space.h revision c93c530efc175954160c3834c93961a1a946a35a 
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  void AssertAllThreadLocalBuffersAreRevoked();
93
94  // Returns the class of a recently freed object.
95  mirror::Class* FindRecentFreedObject(const mirror::Object* obj);
96
97  bool IsRosAllocSpace() const OVERRIDE {
98    return true;
99  }
100
101  RosAllocSpace* AsRosAllocSpace() OVERRIDE {
102    return this;
103  }
104
105  void Verify() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_) {
106    rosalloc_->Verify();
107  }
108
109  virtual ~RosAllocSpace();
110
111 protected:
112  RosAllocSpace(const std::string& name, MemMap* mem_map, allocator::RosAlloc* rosalloc,
113                byte* begin, byte* end, byte* limit, size_t growth_limit);
114
115 private:
116  mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated,
117                              size_t* usable_size);
118
119  void* CreateAllocator(void* base, size_t morecore_start, size_t initial_size,
120                        size_t maximum_size, bool low_memory_mode) OVERRIDE {
121    return CreateRosAlloc(base, morecore_start, initial_size, maximum_size, low_memory_mode);
122  }
123  static allocator::RosAlloc* CreateRosAlloc(void* base, size_t morecore_start, size_t initial_size,
124                                             size_t maximum_size, bool low_memory_mode);
125
126  void InspectAllRosAlloc(void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg),
127                          void* arg)
128      LOCKS_EXCLUDED(Locks::runtime_shutdown_lock_, Locks::thread_list_lock_);
129
130  // Underlying rosalloc.
131  allocator::RosAlloc* const rosalloc_;
132
133  friend class collector::MarkSweep;
134
135  DISALLOW_COPY_AND_ASSIGN(RosAllocSpace);
136};
137
138}  // namespace space
139}  // namespace gc
140}  // namespace art
141
142#endif  // ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_
143