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/*
* Copyright (C) 2012-2023 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.
*/
#include "config.h"
#include "StructureStubClearingWatchpoint.h"
#if ENABLE(JIT)
#include "CodeBlockInlines.h"
#include "JSCellInlines.h"
#include "StructureStubInfo.h"
#include <wtf/TZoneMallocInlines.h>
namespace JSC {
WTF_MAKE_TZONE_ALLOCATED_IMPL(StructureStubInfoClearingWatchpoint);
WTF_MAKE_TZONE_ALLOCATED_IMPL(AdaptiveValueStructureStubClearingWatchpoint);
WTF_MAKE_TZONE_ALLOCATED_IMPL(StructureTransitionStructureStubClearingWatchpoint);
StructureStubInfoClearingWatchpoint::~StructureStubInfoClearingWatchpoint()
{
ASSERT(!m_owner->wasDestructed());
}
void StructureStubInfoClearingWatchpoint::fireInternal(VM&, const FireDetail&)
{
ASSERT(!m_owner->wasDestructed());
if (m_owner->isPendingDestruction())
return;
// This will implicitly cause my own demise: stub reset removes all watchpoints.
// That works, because deleting a watchpoint removes it from the set's list, and
// the set's list traversal for firing is robust against the set changing.
ConcurrentJSLocker locker(m_owner->m_lock);
m_stubInfo.reset(locker, m_owner.get());
}
void StructureTransitionStructureStubClearingWatchpoint::fireInternal(VM& vm, const FireDetail&)
{
if (m_owner->ownerIsDead())
return;
if (!m_key || !m_key.isWatchable(PropertyCondition::EnsureWatchability)) {
StringFireDetail detail("IC has been invalidated");
Ref { m_watchpointSet }->fireAll(vm, detail);
return;
}
if (m_key.kind() == PropertyCondition::Presence) {
// If this was a presence condition, let's watch the property for replacements. This is profitable
// for the DFG, which will want the replacement set to be valid in order to do constant folding.
m_key.object()->structure()->startWatchingPropertyForReplacements(vm, m_key.offset());
}
m_key.object()->structure()->addTransitionWatchpoint(this);
}
void AdaptiveValueStructureStubClearingWatchpoint::handleFire(VM& vm, const FireDetail&)
{
if (m_owner->ownerIsDead())
return;
StringFireDetail detail("IC has been invalidated");
Ref { m_watchpointSet }->fireAll(vm, detail);
}
} // namespace JSC
#endif // ENABLE(JIT)
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