diff options
Diffstat (limited to 'Source/JavaScriptCore/runtime/GetterSetter.h')
| -rw-r--r-- | Source/JavaScriptCore/runtime/GetterSetter.h | 162 |
1 files changed, 49 insertions, 113 deletions
diff --git a/Source/JavaScriptCore/runtime/GetterSetter.h b/Source/JavaScriptCore/runtime/GetterSetter.h index cd204028e..5695bb9e7 100644 --- a/Source/JavaScriptCore/runtime/GetterSetter.h +++ b/Source/JavaScriptCore/runtime/GetterSetter.h @@ -1,7 +1,7 @@ /* * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) * Copyright (C) 2001 Peter Kelly (pmk@post.com) - * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2014 Apple Inc. All rights reserved. + * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public @@ -26,125 +26,61 @@ #include "JSCell.h" #include "CallFrame.h" -#include "JSGlobalObject.h" -#include "NullGetterFunction.h" -#include "NullSetterFunction.h" #include "Structure.h" namespace JSC { -class JSObject; - -// This is an internal value object which stores getter and setter functions -// for a property. Instances of this class have the property that once a getter -// or setter is set to a non-null value, then they cannot be changed. This means -// that if a property holding a GetterSetter reference is constant-inferred and -// that constant is observed to have a non-null setter (or getter) then we can -// constant fold that setter (or getter). -class GetterSetter final : public JSCell { - friend class JIT; - -private: - GetterSetter(VM& vm, JSGlobalObject* globalObject) - : JSCell(vm, vm.getterSetterStructure.get()) - { - m_getter.set(vm, this, globalObject->nullGetterFunction()); - m_setter.set(vm, this, globalObject->nullSetterFunction()); - } - -public: - typedef JSCell Base; - static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal; - - static GetterSetter* create(VM& vm, JSGlobalObject* globalObject) - { - GetterSetter* getterSetter = new (NotNull, allocateCell<GetterSetter>(vm.heap)) GetterSetter(vm, globalObject); - getterSetter->finishCreation(vm); - return getterSetter; - } - - static void visitChildren(JSCell*, SlotVisitor&); - - JSObject* getter() const { return m_getter.get(); } - - JSObject* getterConcurrently() const - { - JSObject* result = getter(); - WTF::loadLoadFence(); - return result; - } - - bool isGetterNull() const { return !!jsDynamicCast<NullGetterFunction*>(m_getter.get()); } - bool isSetterNull() const { return !!jsDynamicCast<NullSetterFunction*>(m_setter.get()); } - - // Set the getter. It's only valid to call this if you've never set the getter on this - // object. - void setGetter(VM& vm, JSGlobalObject* globalObject, JSObject* getter) - { - if (!getter) - getter = jsCast<JSObject*>(globalObject->nullGetterFunction()); - - RELEASE_ASSERT(isGetterNull()); - WTF::storeStoreFence(); - m_getter.set(vm, this, getter); - } - - JSObject* setter() const { return m_setter.get(); } - - JSObject* setterConcurrently() const - { - JSObject* result = setter(); - WTF::loadLoadFence(); - return result; - } - - // Set the setter. It's only valid to call this if you've never set the setter on this - // object. - void setSetter(VM& vm, JSGlobalObject* globalObject, JSObject* setter) - { - if (!setter) - setter = jsCast<JSObject*>(globalObject->nullSetterFunction()); - - RELEASE_ASSERT(isSetterNull()); - WTF::storeStoreFence(); - m_setter.set(vm, this, setter); - } - - GetterSetter* withGetter(VM&, JSGlobalObject*, JSObject* getter); - GetterSetter* withSetter(VM&, JSGlobalObject*, JSObject* setter); - - static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) + class JSObject; + + // This is an internal value object which stores getter and setter functions + // for a property. + class GetterSetter : public JSCell { + friend class JIT; + + private: + GetterSetter(VM& vm) + : JSCell(vm, vm.getterSetterStructure.get()) + { + } + + public: + typedef JSCell Base; + + static GetterSetter* create(VM& vm) + { + GetterSetter* getterSetter = new (NotNull, allocateCell<GetterSetter>(vm.heap)) GetterSetter(vm); + getterSetter->finishCreation(vm); + return getterSetter; + } + + static void visitChildren(JSCell*, SlotVisitor&); + + JSObject* getter() const { return m_getter.get(); } + void setGetter(VM& vm, JSObject* getter) { m_getter.setMayBeNull(vm, this, getter); } + JSObject* setter() const { return m_setter.get(); } + void setSetter(VM& vm, JSObject* setter) { m_setter.setMayBeNull(vm, this, setter); } + static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) + { + return Structure::create(vm, globalObject, prototype, TypeInfo(GetterSetterType, OverridesVisitChildren), info()); + } + + DECLARE_INFO; + + private: + WriteBarrier<JSObject> m_getter; + WriteBarrier<JSObject> m_setter; + }; + + GetterSetter* asGetterSetter(JSValue); + + inline GetterSetter* asGetterSetter(JSValue value) { - return Structure::create(vm, globalObject, prototype, TypeInfo(GetterSetterType), info()); + ASSERT(value.asCell()->isGetterSetter()); + return static_cast<GetterSetter*>(value.asCell()); } - static ptrdiff_t offsetOfGetter() - { - return OBJECT_OFFSETOF(GetterSetter, m_getter); - } - - static ptrdiff_t offsetOfSetter() - { - return OBJECT_OFFSETOF(GetterSetter, m_setter); - } - - DECLARE_INFO; - -private: - WriteBarrier<JSObject> m_getter; - WriteBarrier<JSObject> m_setter; -}; - -GetterSetter* asGetterSetter(JSValue); - -inline GetterSetter* asGetterSetter(JSValue value) -{ - ASSERT_WITH_SECURITY_IMPLICATION(value.asCell()->isGetterSetter()); - return static_cast<GetterSetter*>(value.asCell()); -} - -JSValue callGetter(ExecState*, JSValue base, JSValue getterSetter); -JS_EXPORT_PRIVATE void callSetter(ExecState*, JSValue base, JSValue getterSetter, JSValue, ECMAMode); + JSValue callGetter(ExecState*, JSValue base, JSValue getterSetter); + void callSetter(ExecState*, JSValue base, JSValue getterSetter, JSValue value, ECMAMode); } // namespace JSC |