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
|
/*
* Copyright (C) 2012 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. ``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
* 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 CallLinkInfo_h
#define CallLinkInfo_h
#include "ClosureCallStubRoutine.h"
#include "CodeLocation.h"
#include "CodeSpecializationKind.h"
#include "JITWriteBarrier.h"
#include "JSFunction.h"
#include "Opcode.h"
#include "WriteBarrier.h"
#include <wtf/Platform.h>
#include <wtf/SentinelLinkedList.h>
namespace JSC {
#if ENABLE(JIT)
class RepatchBuffer;
struct CallLinkInfo : public BasicRawSentinelNode<CallLinkInfo> {
enum CallType { None, Call, CallVarargs, Construct };
static CallType callTypeFor(OpcodeID opcodeID)
{
if (opcodeID == op_call || opcodeID == op_call_eval)
return Call;
if (opcodeID == op_construct)
return Construct;
ASSERT(opcodeID == op_call_varargs);
return CallVarargs;
}
CallLinkInfo()
: hasSeenShouldRepatch(false)
, isDFG(false)
, callType(None)
{
}
~CallLinkInfo()
{
if (isOnList())
remove();
}
CodeSpecializationKind specializationKind() const
{
return specializationFromIsConstruct(callType == Construct);
}
CodeLocationNearCall callReturnLocation;
CodeLocationDataLabelPtr hotPathBegin;
CodeLocationNearCall hotPathOther;
JITWriteBarrier<JSFunction> callee;
WriteBarrier<JSFunction> lastSeenCallee;
RefPtr<ClosureCallStubRoutine> stub;
bool hasSeenShouldRepatch : 1;
bool isDFG : 1;
CallType callType : 6;
unsigned calleeGPR : 8;
CodeOrigin codeOrigin;
bool isLinked() { return stub || callee; }
void unlink(JSGlobalData&, RepatchBuffer&);
bool seenOnce()
{
return hasSeenShouldRepatch;
}
void setSeen()
{
hasSeenShouldRepatch = true;
}
};
inline void* getCallLinkInfoReturnLocation(CallLinkInfo* callLinkInfo)
{
return callLinkInfo->callReturnLocation.executableAddress();
}
inline unsigned getCallLinkInfoBytecodeIndex(CallLinkInfo* callLinkInfo)
{
return callLinkInfo->codeOrigin.bytecodeIndex;
}
#endif // ENABLE(JIT)
} // namespace JSC
#endif // CallLinkInfo_h
|
