1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_GC_SPACE_ZYGOTE_SPACE_H_
#define ART_RUNTIME_GC_SPACE_ZYGOTE_SPACE_H_
#include "gc/accounting/space_bitmap.h"
#include "malloc_space.h"
#include "mem_map.h"
namespace art {
namespace gc {
namespace space {
// An zygote space is a space which you cannot allocate into or free from.
class ZygoteSpace FINAL : public ContinuousMemMapAllocSpace {
public:
// Returns the remaining storage in the out_map field.
static ZygoteSpace* Create(const std::string& name, MemMap* mem_map,
accounting::ContinuousSpaceBitmap* live_bitmap,
accounting::ContinuousSpaceBitmap* mark_bitmap)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void Dump(std::ostream& os) const;
SpaceType GetType() const OVERRIDE {
return kSpaceTypeZygoteSpace;
}
ZygoteSpace* AsZygoteSpace() OVERRIDE {
return this;
}
mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size, size_t* bytes_tl_bulk_allocated) OVERRIDE;
size_t AllocationSize(mirror::Object* obj, size_t* usable_size) OVERRIDE;
size_t Free(Thread* self, mirror::Object* ptr) OVERRIDE;
size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) OVERRIDE;
// ZygoteSpaces don't have thread local state.
size_t RevokeThreadLocalBuffers(art::Thread*) OVERRIDE {
return 0U;
}
size_t RevokeAllThreadLocalBuffers() OVERRIDE {
return 0U;
}
uint64_t GetBytesAllocated() {
return Size();
}
uint64_t GetObjectsAllocated() {
return objects_allocated_.LoadSequentiallyConsistent();
}
void Clear() OVERRIDE;
bool CanMoveObjects() const OVERRIDE {
return false;
}
void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) OVERRIDE
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
protected:
virtual accounting::ContinuousSpaceBitmap::SweepCallback* GetSweepCallback() {
return &SweepCallback;
}
private:
ZygoteSpace(const std::string& name, MemMap* mem_map, size_t objects_allocated);
static void SweepCallback(size_t num_ptrs, mirror::Object** ptrs, void* arg);
AtomicInteger objects_allocated_;
friend class Space;
DISALLOW_COPY_AND_ASSIGN(ZygoteSpace);
};
} // namespace space
} // namespace gc
} // namespace art
#endif // ART_RUNTIME_GC_SPACE_ZYGOTE_SPACE_H_
|
