forked from phoboslab/JavaScriptCore-iOS
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathDFGDesiredWriteBarriers.h
More file actions
102 lines (84 loc) · 3.58 KB
/
DFGDesiredWriteBarriers.h
File metadata and controls
102 lines (84 loc) · 3.58 KB
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
/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DFGDesiredWriteBarriers_h
#define DFGDesiredWriteBarriers_h
#include "WriteBarrier.h"
#include <wtf/Vector.h>
#if ENABLE(DFG_JIT)
namespace JSC {
class JSFunction;
class ScriptExecutable;
class VM;
struct InlineCallFrame;
namespace DFG {
class DesiredWriteBarrier {
public:
enum Type {
ConstantType,
InlineCallFrameExecutableType,
};
DesiredWriteBarrier(Type, CodeBlock*, unsigned index, JSCell* owner);
DesiredWriteBarrier(Type, CodeBlock*, InlineCallFrame*, JSCell* owner);
void trigger(VM&);
private:
JSCell* m_owner;
Type m_type;
CodeBlock* m_codeBlock;
union {
unsigned index;
InlineCallFrame* inlineCallFrame;
} m_which;
};
class DesiredWriteBarriers {
public:
DesiredWriteBarriers();
~DesiredWriteBarriers();
DesiredWriteBarrier& add(DesiredWriteBarrier::Type type, CodeBlock* codeBlock, unsigned index, JSCell* owner)
{
m_barriers.append(DesiredWriteBarrier(type, codeBlock, index, owner));
return m_barriers.last();
}
DesiredWriteBarrier& add(DesiredWriteBarrier::Type type, CodeBlock* codeBlock, InlineCallFrame* inlineCallFrame, JSCell* owner)
{
m_barriers.append(DesiredWriteBarrier(type, codeBlock, inlineCallFrame, owner));
return m_barriers.last();
}
void trigger(VM&);
private:
Vector<DesiredWriteBarrier> m_barriers;
};
inline void initializeLazyWriteBarrierForInlineCallFrameExecutable(DesiredWriteBarriers& barriers, WriteBarrier<ScriptExecutable>& barrier, CodeBlock* codeBlock, InlineCallFrame* inlineCallFrame, JSCell* owner, ScriptExecutable* value)
{
DesiredWriteBarrier& desiredBarrier = barriers.add(DesiredWriteBarrier::InlineCallFrameExecutableType, codeBlock, inlineCallFrame, owner);
barrier = WriteBarrier<ScriptExecutable>(desiredBarrier, value);
}
inline void initializeLazyWriteBarrierForConstant(DesiredWriteBarriers& barriers, WriteBarrier<Unknown>& barrier, CodeBlock* codeBlock, unsigned index, JSCell* owner, JSValue value)
{
DesiredWriteBarrier& desiredBarrier = barriers.add(DesiredWriteBarrier::ConstantType, codeBlock, index, owner);
barrier = WriteBarrier<Unknown>(desiredBarrier, value);
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGDesiredWriteBarriers_h