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/*
* Copyright (C) 2017-2022 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.
*/
#include "config.h"
#include "DOMGCOutputConstraint.h"
#include "WebCoreJSClientData.h"
#include <JavaScriptCore/BlockDirectoryInlines.h>
#include <JavaScriptCore/HeapInlines.h>
#include <JavaScriptCore/JSCellInlines.h>
#include <JavaScriptCore/MarkedBlockInlines.h>
#include <JavaScriptCore/SlotVisitorInlines.h>
#include <JavaScriptCore/SubspaceInlines.h>
#include <JavaScriptCore/VM.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
using namespace JSC;
WTF_MAKE_TZONE_ALLOCATED_IMPL(DOMGCOutputConstraint);
DOMGCOutputConstraint::DOMGCOutputConstraint(VM& vm, JSHeapData& heapData)
: MarkingConstraint("Domo"_s, "DOM Output"_s, ConstraintVolatility::SeldomGreyed, ConstraintConcurrency::Concurrent, ConstraintParallelism::Parallel)
, m_vm(vm)
, m_heapData(heapData)
, m_lastExecutionVersion(vm.heap.mutatorExecutionVersion())
{
}
DOMGCOutputConstraint::~DOMGCOutputConstraint()
{
}
template<typename Visitor>
void DOMGCOutputConstraint::executeImplImpl(Visitor& visitor)
{
Heap& heap = m_vm.heap;
if (heap.mutatorExecutionVersion() == m_lastExecutionVersion)
return;
m_lastExecutionVersion = heap.mutatorExecutionVersion();
m_heapData.forEachOutputConstraintSpace(
[&] (Subspace& subspace) {
auto func = [] (Visitor& visitor, HeapCell* heapCell, HeapCell::Kind) {
SetRootMarkReasonScope rootScope(visitor, RootMarkReason::DOMGCOutput);
JSCell* cell = static_cast<JSCell*>(heapCell);
cell->methodTable()->visitOutputConstraints(cell, visitor);
};
RefPtr<SharedTask<void(Visitor&)>> task = subspace.template forEachMarkedCellInParallel<Visitor>(func);
visitor.addParallelConstraintTask(task);
});
}
void DOMGCOutputConstraint::executeImpl(AbstractSlotVisitor& visitor) { executeImplImpl(visitor); }
void DOMGCOutputConstraint::executeImpl(SlotVisitor& visitor) { executeImplImpl(visitor); }
} // namespace WebCore
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