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/*
* Copyright (C) 2017-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* 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
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*/
#include "config.h"
#include "MarkingConstraint.h"
#include "JSCInlines.h"
#include "VisitCounter.h"
namespace JSC {
static constexpr bool verboseMarkingConstraint = false;
MarkingConstraint::MarkingConstraint(CString abbreviatedName, CString name, ConstraintVolatility volatility, ConstraintConcurrency concurrency, ConstraintParallelism parallelism)
: m_abbreviatedName(abbreviatedName)
, m_name(WTFMove(name))
, m_volatility(volatility)
, m_concurrency(concurrency)
, m_parallelism(parallelism)
{
}
MarkingConstraint::~MarkingConstraint()
{
}
void MarkingConstraint::resetStats()
{
m_lastVisitCount = 0;
}
void MarkingConstraint::execute(SlotVisitor& visitor)
{
ASSERT(!visitor.heap()->isMarkingForGCVerifier());
VisitCounter visitCounter(visitor);
executeImpl(visitor);
m_lastVisitCount += visitCounter.visitCount();
if (verboseMarkingConstraint && visitCounter.visitCount())
dataLog("(", abbreviatedName(), " visited ", visitCounter.visitCount(), " in execute)");
}
void MarkingConstraint::executeSynchronously(AbstractSlotVisitor& visitor)
{
prepareToExecuteImpl(NoLockingNecessary, visitor);
executeImpl(visitor);
}
double MarkingConstraint::quickWorkEstimate(SlotVisitor&)
{
return 0;
}
double MarkingConstraint::workEstimate(SlotVisitor& visitor)
{
return lastVisitCount() + quickWorkEstimate(visitor);
}
void MarkingConstraint::prepareToExecute(const AbstractLocker& constraintSolvingLocker, SlotVisitor& visitor)
{
ASSERT(!visitor.heap()->isMarkingForGCVerifier());
dataLogIf(Options::logGC(), abbreviatedName());
VisitCounter visitCounter(visitor);
prepareToExecuteImpl(constraintSolvingLocker, visitor);
m_lastVisitCount = visitCounter.visitCount();
if (verboseMarkingConstraint && visitCounter.visitCount())
dataLog("(", abbreviatedName(), " visited ", visitCounter.visitCount(), " in prepareToExecute)");
}
void MarkingConstraint::doParallelWork(SlotVisitor& visitor, SharedTask<void(SlotVisitor&)>& task)
{
ASSERT(!visitor.heap()->isMarkingForGCVerifier());
VisitCounter visitCounter(visitor);
task.run(visitor);
if (verboseMarkingConstraint && visitCounter.visitCount())
dataLog("(", abbreviatedName(), " visited ", visitCounter.visitCount(), " in doParallelWork)");
{
Locker locker { m_lock };
m_lastVisitCount += visitCounter.visitCount();
}
}
void MarkingConstraint::prepareToExecuteImpl(const AbstractLocker&, AbstractSlotVisitor&)
{
}
} // namespace JSC