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/*
* Copyright (C) 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.
*/
#pragma once
#include "ObjectPropertyCondition.h"
#include "PackedCellPtr.h"
#include "Watchpoint.h"
namespace JSC {
class ObjectAdaptiveStructureWatchpoint final : public Watchpoint {
public:
ObjectAdaptiveStructureWatchpoint(JSCell* owner, const ObjectPropertyCondition& key, InlineWatchpointSet& watchpointSet)
: Watchpoint(Watchpoint::Type::ObjectAdaptiveStructure)
, m_owner(owner)
, m_key(key)
, m_watchpointSet(watchpointSet)
{
RELEASE_ASSERT(key.kind() != PropertyCondition::Equivalence);
RELEASE_ASSERT(key.watchingRequiresStructureTransitionWatchpoint());
RELEASE_ASSERT(!key.watchingRequiresReplacementWatchpoint());
RELEASE_ASSERT(watchpointSet.state() == IsWatched);
}
const ObjectPropertyCondition& key() const { return m_key; }
void install(VM&);
void fireInternal(VM&, const FireDetail&);
private:
PackedCellPtr<JSCell> m_owner;
ObjectPropertyCondition m_key;
InlineWatchpointSet& m_watchpointSet;
};
inline void ObjectAdaptiveStructureWatchpoint::install(VM&)
{
RELEASE_ASSERT(m_key.isWatchable(PropertyCondition::MakeNoChanges));
m_key.object()->structure()->addTransitionWatchpoint(this);
}
inline void ObjectAdaptiveStructureWatchpoint::fireInternal(VM& vm, const FireDetail&)
{
if (m_owner->isPendingDestruction())
return;
if (m_key.isWatchable(PropertyCondition::EnsureWatchability)) {
install(vm);
return;
}
m_watchpointSet.fireAll(vm, StringFireDetail("Object Property is added."));
}
} // namespace JSC
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