1/*
2 * Copyright (C) 2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "MarkingConstraint.h"
28
29#include "JSCInlines.h"
30#include "VisitCounter.h"
31
32namespace JSC {
33
34static constexpr bool verboseMarkingConstraint = false;
35
36MarkingConstraint::MarkingConstraint(CString abbreviatedName, CString name, ConstraintVolatility volatility, ConstraintConcurrency concurrency, ConstraintParallelism parallelism)
37 : m_abbreviatedName(abbreviatedName)
38 , m_name(WTFMove(name))
39 , m_volatility(volatility)
40 , m_concurrency(concurrency)
41 , m_parallelism(parallelism)
42{
43}
44
45MarkingConstraint::~MarkingConstraint()
46{
47}
48
49void MarkingConstraint::resetStats()
50{
51 m_lastVisitCount = 0;
52}
53
54void MarkingConstraint::execute(SlotVisitor& visitor)
55{
56 VisitCounter visitCounter(visitor);
57 executeImpl(visitor);
58 m_lastVisitCount += visitCounter.visitCount();
59 if (verboseMarkingConstraint && visitCounter.visitCount())
60 dataLog("(", abbreviatedName(), " visited ", visitCounter.visitCount(), " in execute)");
61}
62
63double MarkingConstraint::quickWorkEstimate(SlotVisitor&)
64{
65 return 0;
66}
67
68double MarkingConstraint::workEstimate(SlotVisitor& visitor)
69{
70 return lastVisitCount() + quickWorkEstimate(visitor);
71}
72
73void MarkingConstraint::prepareToExecute(const AbstractLocker& constraintSolvingLocker, SlotVisitor& visitor)
74{
75 if (Options::logGC())
76 dataLog(abbreviatedName());
77 VisitCounter visitCounter(visitor);
78 prepareToExecuteImpl(constraintSolvingLocker, visitor);
79 m_lastVisitCount = visitCounter.visitCount();
80 if (verboseMarkingConstraint && visitCounter.visitCount())
81 dataLog("(", abbreviatedName(), " visited ", visitCounter.visitCount(), " in prepareToExecute)");
82}
83
84void MarkingConstraint::doParallelWork(SlotVisitor& visitor, SharedTask<void(SlotVisitor&)>& task)
85{
86 VisitCounter visitCounter(visitor);
87 task.run(visitor);
88 if (verboseMarkingConstraint && visitCounter.visitCount())
89 dataLog("(", abbreviatedName(), " visited ", visitCounter.visitCount(), " in doParallelWork)");
90 {
91 auto locker = holdLock(m_lock);
92 m_lastVisitCount += visitCounter.visitCount();
93 }
94}
95
96void MarkingConstraint::prepareToExecuteImpl(const AbstractLocker&, SlotVisitor&)
97{
98}
99
100} // namespace JSC
101
102