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
|
/*
* Copyright (C) 2016-2023 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.
*/
#pragma once
#if ENABLE(JIT)
#include "JITPlan.h"
#include "JITWorklistThread.h"
#include <wtf/Deque.h>
#include <wtf/Lock.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefPtr.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/Vector.h>
namespace JSC {
class CodeBlock;
class VM;
class JITWorklist {
WTF_MAKE_NONCOPYABLE(JITWorklist);
WTF_MAKE_TZONE_ALLOCATED(JITWorklist);
friend class JITWorklistThread;
public:
~JITWorklist();
static JITWorklist& ensureGlobalWorklist();
static JITWorklist* existingGlobalWorklistOrNull();
CompilationResult enqueue(Ref<JITPlan>);
size_t queueLength() const;
void suspendAllThreads();
void resumeAllThreads();
enum State { NotKnown, Compiling, Compiled };
State compilationState(VM&, JITCompilationKey);
State completeAllReadyPlansForVM(VM&, JITCompilationKey = JITCompilationKey());
// This is equivalent to:
// worklist->waitUntilAllPlansForVMAreReady(vm);
// worklist->completeAllReadyPlansForVM(vm);
void completeAllPlansForVM(VM&);
void cancelAllPlansForVM(VM&);
void removeDeadPlans(VM&);
unsigned setMaximumNumberOfConcurrentDFGCompilations(unsigned);
unsigned setMaximumNumberOfConcurrentFTLCompilations(unsigned);
// Only called on the main thread after suspending all threads.
template<typename Visitor>
void visitWeakReferences(Visitor&);
template<typename Visitor>
void iterateCodeBlocksForGC(Visitor&, VM&, NOESCAPE const Function<void(CodeBlock*)>&);
void dump(PrintStream&) const;
private:
JITWorklist();
size_t queueLength(const AbstractLocker&) const;
void waitUntilAllPlansForVMAreReady(VM&);
template<typename MatchFunction>
void removeMatchingPlansForVM(VM&, const MatchFunction&);
State removeAllReadyPlansForVM(VM&, Vector<RefPtr<JITPlan>, 8>&, JITCompilationKey);
void dump(const AbstractLocker&, PrintStream&) const;
unsigned m_numberOfActiveThreads { 0 };
std::array<unsigned, static_cast<size_t>(JITPlan::Tier::Count)> m_ongoingCompilationsPerTier { 0, 0, 0 };
std::array<unsigned, static_cast<size_t>(JITPlan::Tier::Count)> m_maximumNumberOfConcurrentCompilationsPerTier;
Vector<Ref<JITWorklistThread>> m_threads;
// Used to inform the thread about what work there is left to do.
std::array<Deque<RefPtr<JITPlan>>, static_cast<size_t>(JITPlan::Tier::Count)> m_queues;
// Used to answer questions about the current state of a code block. This
// is particularly great for the cti_optimize OSR slow path, which wants
// to know: did I get here because a better version of me just got
// compiled?
UncheckedKeyHashMap<JITCompilationKey, RefPtr<JITPlan>> m_plans;
// Used to quickly find which plans have been compiled and are ready to
// be completed.
Vector<RefPtr<JITPlan>, 16> m_readyPlans;
Lock m_suspensionLock;
Box<Lock> m_lock;
Ref<AutomaticThreadCondition> m_planEnqueued;
Condition m_planCompiledOrCancelled;
};
} // namespace JSC
#endif // ENABLE(JIT)
|
