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
|
/*
* Copyright (C) 2013-2015 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 DFGJITCode_h
#define DFGJITCode_h
#if ENABLE(DFG_JIT)
#include "CodeBlock.h"
#include "CompilationResult.h"
#include "DFGCommonData.h"
#include "DFGMinifiedGraph.h"
#include "DFGOSREntry.h"
#include "DFGOSRExit.h"
#include "DFGVariableEventStream.h"
#include "ExecutionCounter.h"
#include "JITCode.h"
#include <wtf/SegmentedVector.h>
namespace JSC {
class TrackedReferences;
namespace DFG {
class JITCompiler;
class JITCode : public DirectJITCode {
public:
JITCode();
virtual ~JITCode();
virtual CommonData* dfgCommon() override;
virtual JITCode* dfg() override;
OSREntryData* appendOSREntryData(unsigned bytecodeIndex, unsigned machineCodeOffset)
{
DFG::OSREntryData entry;
entry.m_bytecodeIndex = bytecodeIndex;
entry.m_machineCodeOffset = machineCodeOffset;
osrEntry.append(entry);
return &osrEntry.last();
}
OSREntryData* osrEntryDataForBytecodeIndex(unsigned bytecodeIndex)
{
return tryBinarySearch<OSREntryData, unsigned>(
osrEntry, osrEntry.size(), bytecodeIndex,
getOSREntryDataBytecodeIndex);
}
unsigned appendOSRExit(const OSRExit& exit)
{
unsigned result = osrExit.size();
osrExit.append(exit);
return result;
}
OSRExit& lastOSRExit()
{
return osrExit.last();
}
unsigned appendSpeculationRecovery(const SpeculationRecovery& recovery)
{
unsigned result = speculationRecovery.size();
speculationRecovery.append(recovery);
return result;
}
void reconstruct(
CodeBlock*, CodeOrigin, unsigned streamIndex, Operands<ValueRecovery>& result);
// This is only applicable if we're at a point where all values are spilled to the
// stack. Currently, it also has the restriction that the values must be in their
// bytecode-designated stack slots.
void reconstruct(
ExecState*, CodeBlock*, CodeOrigin, unsigned streamIndex, Operands<JSValue>& result);
#if ENABLE(FTL_JIT)
// NB. All of these methods take CodeBlock* because they may want to use
// CodeBlock's logic about scaling thresholds. It should be a DFG CodeBlock.
bool checkIfOptimizationThresholdReached(CodeBlock*);
void optimizeNextInvocation(CodeBlock*);
void dontOptimizeAnytimeSoon(CodeBlock*);
void optimizeAfterWarmUp(CodeBlock*);
void optimizeSoon(CodeBlock*);
void forceOptimizationSlowPathConcurrently(CodeBlock*);
void setOptimizationThresholdBasedOnCompilationResult(CodeBlock*, CompilationResult);
#endif // ENABLE(FTL_JIT)
void validateReferences(const TrackedReferences&) override;
void shrinkToFit();
RegisterSet liveRegistersToPreserveAtExceptionHandlingCallSite(CodeBlock*, CallSiteIndex) override;
#if ENABLE(FTL_JIT)
CodeBlock* osrEntryBlock() { return m_osrEntryBlock.get(); }
void setOSREntryBlock(VM& vm, const JSCell* owner, CodeBlock* osrEntryBlock) { m_osrEntryBlock.set(vm, owner, osrEntryBlock); }
void clearOSREntryBlock() { m_osrEntryBlock.clear(); }
#endif
static ptrdiff_t commonDataOffset() { return OBJECT_OFFSETOF(JITCode, common); }
Optional<CodeOrigin> findPC(CodeBlock*, void* pc) override;
private:
friend class JITCompiler; // Allow JITCompiler to call setCodeRef().
public:
CommonData common;
Vector<DFG::OSREntryData> osrEntry;
SegmentedVector<DFG::OSRExit, 8> osrExit;
Vector<DFG::SpeculationRecovery> speculationRecovery;
DFG::VariableEventStream variableEventStream;
DFG::MinifiedGraph minifiedDFG;
#if ENABLE(FTL_JIT)
uint8_t nestedTriggerIsSet { 0 };
uint8_t neverExecutedEntry { 1 };
UpperTierExecutionCounter tierUpCounter;
WriteBarrier<CodeBlock> m_osrEntryBlock;
unsigned osrEntryRetry;
bool abandonOSREntry;
#endif // ENABLE(FTL_JIT)
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGJITCode_h
|
