144 lines
5.2 KiB
C++
144 lines
5.2 KiB
C++
/*
|
|
* Copyright (C) 2013 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. 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
|
|
* 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 "JSImmutableButterfly.h"
|
|
#include "JSPropertyNameEnumerator.h"
|
|
#include "JSString.h"
|
|
#include "StructureRareData.h"
|
|
|
|
namespace JSC {
|
|
|
|
// FIXME: Use ObjectPropertyConditionSet instead.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=216112
|
|
struct SpecialPropertyCacheEntry {
|
|
WTF_MAKE_STRUCT_FAST_ALLOCATED;
|
|
~SpecialPropertyCacheEntry();
|
|
Bag<CachedSpecialPropertyAdaptiveStructureWatchpoint> m_missWatchpoints;
|
|
std::unique_ptr<CachedSpecialPropertyAdaptiveInferredPropertyValueWatchpoint> m_equivalenceWatchpoint;
|
|
WriteBarrier<Unknown> m_value;
|
|
};
|
|
|
|
struct SpecialPropertyCache {
|
|
WTF_MAKE_STRUCT_FAST_ALLOCATED;
|
|
SpecialPropertyCacheEntry m_cache[numberOfCachedSpecialPropertyKeys];
|
|
};
|
|
|
|
inline void StructureRareData::setPreviousID(VM& vm, Structure* structure)
|
|
{
|
|
m_previous.set(vm, this, structure);
|
|
}
|
|
|
|
inline void StructureRareData::clearPreviousID()
|
|
{
|
|
m_previous.clear();
|
|
}
|
|
|
|
inline JSValue StructureRareData::cachedSpecialProperty(CachedSpecialPropertyKey key) const
|
|
{
|
|
auto* cache = m_specialPropertyCache.get();
|
|
if (!cache)
|
|
return JSValue();
|
|
JSValue value = cache->m_cache[static_cast<unsigned>(key)].m_value.get();
|
|
if (value == JSCell::seenMultipleCalleeObjects())
|
|
return JSValue();
|
|
#if ASSERT_ENABLED
|
|
if (value && value.isCell())
|
|
validateCell(value.asCell());
|
|
#endif
|
|
return value;
|
|
}
|
|
|
|
inline JSPropertyNameEnumerator* StructureRareData::cachedPropertyNameEnumerator() const
|
|
{
|
|
return m_cachedPropertyNameEnumerator.get();
|
|
}
|
|
|
|
inline void StructureRareData::setCachedPropertyNameEnumerator(VM& vm, JSPropertyNameEnumerator* enumerator)
|
|
{
|
|
m_cachedPropertyNameEnumerator.set(vm, this, enumerator);
|
|
}
|
|
|
|
inline JSImmutableButterfly* StructureRareData::cachedPropertyNames(CachedPropertyNamesKind kind) const
|
|
{
|
|
ASSERT(!isCompilationThread());
|
|
auto* butterfly = m_cachedPropertyNames[static_cast<unsigned>(kind)].unvalidatedGet();
|
|
if (butterfly == cachedPropertyNamesSentinel())
|
|
return nullptr;
|
|
return butterfly;
|
|
}
|
|
|
|
inline JSImmutableButterfly* StructureRareData::cachedPropertyNamesIgnoringSentinel(CachedPropertyNamesKind kind) const
|
|
{
|
|
ASSERT(!isCompilationThread());
|
|
return m_cachedPropertyNames[static_cast<unsigned>(kind)].unvalidatedGet();
|
|
}
|
|
|
|
inline JSImmutableButterfly* StructureRareData::cachedPropertyNamesConcurrently(CachedPropertyNamesKind kind) const
|
|
{
|
|
auto* butterfly = m_cachedPropertyNames[static_cast<unsigned>(kind)].unvalidatedGet();
|
|
if (butterfly == cachedPropertyNamesSentinel())
|
|
return nullptr;
|
|
return butterfly;
|
|
}
|
|
|
|
inline void StructureRareData::setCachedPropertyNames(VM& vm, CachedPropertyNamesKind kind, JSImmutableButterfly* butterfly)
|
|
{
|
|
if (butterfly == cachedPropertyNamesSentinel()) {
|
|
m_cachedPropertyNames[static_cast<unsigned>(kind)].setWithoutWriteBarrier(butterfly);
|
|
return;
|
|
}
|
|
|
|
WTF::storeStoreFence();
|
|
m_cachedPropertyNames[static_cast<unsigned>(kind)].set(vm, this, butterfly);
|
|
}
|
|
|
|
inline bool StructureRareData::canCacheSpecialProperty(CachedSpecialPropertyKey key)
|
|
{
|
|
ASSERT(!isCompilationThread() && !Thread::mayBeGCThread());
|
|
auto* cache = m_specialPropertyCache.get();
|
|
if (!cache)
|
|
return true;
|
|
return cache->m_cache[static_cast<unsigned>(key)].m_value.get() != JSCell::seenMultipleCalleeObjects();
|
|
}
|
|
|
|
inline SpecialPropertyCache& StructureRareData::ensureSpecialPropertyCache()
|
|
{
|
|
ASSERT(!isCompilationThread() && !Thread::mayBeGCThread());
|
|
if (auto* cache = m_specialPropertyCache.get())
|
|
return *cache;
|
|
return ensureSpecialPropertyCacheSlow();
|
|
}
|
|
|
|
inline void StructureRareData::cacheSpecialProperty(JSGlobalObject* globalObject, VM& vm, Structure* ownStructure, JSValue value, CachedSpecialPropertyKey key, const PropertySlot& slot)
|
|
{
|
|
if (!canCacheSpecialProperty(key))
|
|
return;
|
|
return cacheSpecialPropertySlow(globalObject, vm, ownStructure, value, key, slot);
|
|
}
|
|
|
|
} // namespace JSC
|