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/*
* Copyright (C) 2008-2022 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 "JSCJSValue.h"
#include "PropertySlot.h"
#include <wtf/Assertions.h>
namespace JSC {
class JSObject;
class JSFunction;
using CustomAccessorValueFunc = FunctionPtr<CustomAccessorPtrTag, bool(JSGlobalObject*, EncodedJSValue, EncodedJSValue, PropertyName), FunctionAttributes::JITOperation>;
class PutPropertySlot {
public:
enum Type : uint8_t { Uncachable, ExistingProperty, NewProperty, SetterProperty, CustomValue, CustomAccessor };
enum Context : uint8_t { UnknownContext, PutById, PutByIdEval };
PutPropertySlot(JSValue thisValue, bool isStrictMode = false, Context context = UnknownContext, bool isInitialization = false)
: m_base(nullptr)
, m_thisValue(thisValue)
, m_offset(invalidOffset)
, m_isStrictMode(isStrictMode)
, m_isInitialization(isInitialization)
, m_isTaintedByOpaqueObject(false)
, m_type(Uncachable)
, m_context(context)
, m_cacheability(CachingAllowed)
{
}
void setExistingProperty(JSObject* base, PropertyOffset offset)
{
m_type = ExistingProperty;
m_base = base;
m_offset = offset;
}
void setNewProperty(JSObject* base, PropertyOffset offset)
{
m_type = NewProperty;
m_base = base;
m_offset = offset;
}
void setCustomValue(JSObject* base, PutValueFunc function)
{
m_type = CustomValue;
m_base = base;
m_putFunction = function.get();
}
void setCustomAccessor(JSObject* base, PutValueFunc function)
{
m_type = CustomAccessor;
m_base = base;
m_putFunction = function.get();
}
void setCacheableSetter(JSObject* base, PropertyOffset offset)
{
m_type = SetterProperty;
m_base = base;
m_offset = offset;
}
void setThisValue(JSValue thisValue)
{
m_thisValue = thisValue;
}
void setStrictMode(bool value)
{
m_isStrictMode = value;
}
CustomAccessorValueFunc customSetter() const
{
ASSERT(isCacheableCustom());
return m_putFunction;
}
Type type() const { return m_type; }
Context context() const { return m_context; }
JSObject* base() const { return m_base; }
JSValue thisValue() const { return m_thisValue; }
bool isStrictMode() const { return m_isStrictMode; }
bool isCacheablePut() const { return isCacheable() && (m_type == NewProperty || m_type == ExistingProperty); }
bool isCacheableSetter() const { return isCacheable() && m_type == SetterProperty; }
bool isCacheableCustom() const { return isCacheable() && (m_type == CustomValue || m_type == CustomAccessor) && !!m_putFunction; }
bool isCustomAccessor() const { return isCacheable() && m_type == CustomAccessor; }
bool isInitialization() const { return m_isInitialization; }
bool isTaintedByOpaqueObject() const { return m_isTaintedByOpaqueObject; }
void setIsTaintedByOpaqueObject() { m_isTaintedByOpaqueObject = true; }
PropertyOffset cachedOffset() const
{
return m_offset;
}
void disableCaching()
{
m_cacheability = CachingDisallowed;
}
private:
bool isCacheable() const { return m_cacheability == CachingAllowed; }
JSObject* m_base;
JSValue m_thisValue;
PropertyOffset m_offset;
bool m_isStrictMode : 1;
bool m_isInitialization : 1;
bool m_isTaintedByOpaqueObject : 1;
Type m_type;
Context m_context;
CacheabilityType m_cacheability;
CustomAccessorValueFunc m_putFunction;
};
} // namespace JSC
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