blob: c90f55d7baa5dadf7a251f3e44bff2bc3362c43d [file] [log] [blame]
/*
* Copyright (C) 2015-2017 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 "InferredValue.h"
#include "IsoCellSetInlines.h"
#include "JSCInlines.h"
namespace JSC {
const ClassInfo InferredValue::s_info = { "InferredValue", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(InferredValue) };
InferredValue* InferredValue::create(VM& vm)
{
ASSERT(VM::canUseJIT());
InferredValue* result = new (NotNull, allocateCell<InferredValue>(vm.heap)) InferredValue(vm);
result->finishCreation(vm);
return result;
}
void InferredValue::destroy(JSCell* cell)
{
InferredValue* inferredValue = static_cast<InferredValue*>(cell);
inferredValue->InferredValue::~InferredValue();
}
Structure* InferredValue::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
void InferredValue::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
InferredValue* inferredValue = jsCast<InferredValue*>(cell);
Base::visitChildren(cell, visitor);
JSValue value = inferredValue->m_value.get();
if (!value)
return;
if (!value.isCell())
return;
VM::SpaceAndSet::setFor(*inferredValue->subspace()).add(inferredValue);
}
InferredValue::InferredValue(VM& vm)
: Base(vm, vm.inferredValueStructure.get())
, m_set(ClearWatchpoint)
{
}
InferredValue::~InferredValue()
{
}
void InferredValue::notifyWriteSlow(VM& vm, JSValue value, const FireDetail& detail)
{
ASSERT(!!value);
switch (m_set.state()) {
case ClearWatchpoint:
m_value.set(vm, this, value);
m_set.startWatching();
return;
case IsWatched:
ASSERT(!!m_value);
if (m_value.get() == value)
return;
invalidate(vm, detail);
return;
case IsInvalidated:
ASSERT_NOT_REACHED();
return;
}
ASSERT_NOT_REACHED();
}
void InferredValue::notifyWriteSlow(VM& vm, JSValue value, const char* reason)
{
notifyWriteSlow(vm, value, StringFireDetail(reason));
}
} // namespace JSC