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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* 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_TRANSACTION_H_
#define ART_RUNTIME_TRANSACTION_H_
#include "base/macros.h"
#include "base/mutex.h"
#include "object_callbacks.h"
#include "offsets.h"
#include "primitive.h"
#include "safe_map.h"
#include <list>
#include <map>
namespace art {
namespace mirror {
class Array;
class Object;
class String;
}
class InternTable;
class Transaction {
public:
Transaction();
~Transaction();
// Record object field changes.
void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value,
bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
void RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
mirror::Object* value, bool is_volatile)
LOCKS_EXCLUDED(log_lock_);
// Record array change.
void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value)
LOCKS_EXCLUDED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Record intern string table changes.
void RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
// Abort transaction by undoing all recorded changes.
void Abort()
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
LOCKS_EXCLUDED(log_lock_);
void VisitRoots(RootCallback* callback, void* arg)
LOCKS_EXCLUDED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
class ObjectLog {
public:
void Log32BitsValue(MemberOffset offset, uint32_t value, bool is_volatile);
void Log64BitsValue(MemberOffset offset, uint64_t value, bool is_volatile);
void LogReferenceValue(MemberOffset offset, mirror::Object* obj, bool is_volatile);
void Undo(mirror::Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitRoots(RootCallback* callback, void* arg);
size_t Size() const {
return field_values_.size();
}
private:
enum FieldValueKind {
k32Bits,
k64Bits,
kReference
};
struct FieldValue {
// TODO use JValue instead ?
uint64_t value;
FieldValueKind kind;
bool is_volatile;
};
void UndoFieldWrite(mirror::Object* obj, MemberOffset field_offset,
const FieldValue& field_value) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Maps field's offset to its value.
std::map<uint32_t, FieldValue> field_values_;
};
class ArrayLog {
public:
void LogValue(size_t index, uint64_t value);
void Undo(mirror::Array* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
size_t Size() const {
return array_values_.size();
}
private:
void UndoArrayWrite(mirror::Array* array, Primitive::Type array_type, size_t index,
uint64_t value) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Maps index to value.
// TODO use JValue instead ?
std::map<size_t, uint64_t> array_values_;
};
class InternStringLog {
public:
enum StringKind {
kStrongString,
kWeakString
};
enum StringOp {
kInsert,
kRemove
};
InternStringLog(mirror::String* s, uint32_t hash_code, StringKind kind, StringOp op)
: str_(s), hash_code_(hash_code), string_kind_(kind), string_op_(op) {
DCHECK(s != nullptr);
}
void Undo(InternTable* intern_table)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_);
void VisitRoots(RootCallback* callback, void* arg);
private:
mirror::String* str_;
uint32_t hash_code_;
StringKind string_kind_;
StringOp string_op_;
};
void LogInternedString(InternStringLog& log)
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
LOCKS_EXCLUDED(log_lock_);
void UndoObjectModifications()
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void UndoArrayModifications()
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void UndoInternStringTableModifications()
EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitObjectLogs(RootCallback* callback, void* arg)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitArrayLogs(RootCallback* callback, void* arg)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void VisitStringLogs(RootCallback* callback, void* arg)
EXCLUSIVE_LOCKS_REQUIRED(log_lock_)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
Mutex log_lock_ ACQUIRED_AFTER(Locks::intern_table_lock_);
std::map<mirror::Object*, ObjectLog> object_logs_ GUARDED_BY(log_lock_);
std::map<mirror::Array*, ArrayLog> array_logs_ GUARDED_BY(log_lock_);
std::list<InternStringLog> intern_string_logs_ GUARDED_BY(log_lock_);
DISALLOW_COPY_AND_ASSIGN(Transaction);
};
} // namespace art
#endif // ART_RUNTIME_TRANSACTION_H_
|
