/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
- * Copyright (C) 2003, 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2007 Eric Seidel (eric@webkit.org)
*
* This library is free software; you can redistribute it and/or
#include "config.h"
#include "JSObject.h"
+#include "CopiedSpaceInlineMethods.h"
#include "DatePrototype.h"
#include "ErrorConstructor.h"
#include "GetterSetter.h"
+#include "JSFunction.h"
#include "JSGlobalObject.h"
-#include "NativeErrorConstructor.h"
-#include "ObjectPrototype.h"
-#include "PropertyNameArray.h"
+#include "JSGlobalThis.h"
#include "Lookup.h"
+#include "NativeErrorConstructor.h"
#include "Nodes.h"
+#include "ObjectPrototype.h"
#include "Operations.h"
+#include "PropertyDescriptor.h"
+#include "PropertyNameArray.h"
#include <math.h>
#include <wtf/Assertions.h>
-#define JSOBJECT_MARK_TRACING 0
-
-#if JSOBJECT_MARK_TRACING
+namespace JSC {
-#define JSOBJECT_MARK_BEGIN() \
- static int markStackDepth = 0; \
- for (int i = 0; i < markStackDepth; i++) \
- putchar('-'); \
- printf("%s (%p)\n", className().UTF8String().c_str(), this); \
- markStackDepth++; \
+ASSERT_CLASS_FITS_IN_CELL(JSObject);
+ASSERT_CLASS_FITS_IN_CELL(JSNonFinalObject);
+ASSERT_CLASS_FITS_IN_CELL(JSFinalObject);
-#define JSOBJECT_MARK_END() \
- markStackDepth--;
+ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSObject);
+ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSFinalObject);
-#else // JSOBJECT_MARK_TRACING
+const char* StrictModeReadonlyPropertyWriteError = "Attempted to assign to readonly property.";
-#define JSOBJECT_MARK_BEGIN()
-#define JSOBJECT_MARK_END()
+const ClassInfo JSObject::s_info = { "Object", 0, 0, 0, CREATE_METHOD_TABLE(JSObject) };
-#endif // JSOBJECT_MARK_TRACING
+const ClassInfo JSFinalObject::s_info = { "Object", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSFinalObject) };
-namespace JSC {
+static inline void getClassPropertyNames(ExecState* exec, const ClassInfo* classInfo, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+ // Add properties from the static hashtables of properties
+ for (; classInfo; classInfo = classInfo->parentClass) {
+ const HashTable* table = classInfo->propHashTable(exec);
+ if (!table)
+ continue;
+ table->initializeIfNeeded(exec);
+ ASSERT(table->table);
-ASSERT_CLASS_FITS_IN_CELL(JSObject);
+ int hashSizeMask = table->compactSize - 1;
+ const HashEntry* entry = table->table;
+ for (int i = 0; i <= hashSizeMask; ++i, ++entry) {
+ if (entry->key() && (!(entry->attributes() & DontEnum) || (mode == IncludeDontEnumProperties)))
+ propertyNames.add(entry->key());
+ }
+ }
+}
-void JSObject::mark()
+void JSObject::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
- JSOBJECT_MARK_BEGIN();
-
- JSCell::mark();
- m_structure->mark();
+ JSObject* thisObject = jsCast<JSObject*>(cell);
+ ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
+#if !ASSERT_DISABLED
+ bool wasCheckingForDefaultMarkViolation = visitor.m_isCheckingForDefaultMarkViolation;
+ visitor.m_isCheckingForDefaultMarkViolation = false;
+#endif
- PropertyStorage storage = propertyStorage();
+ JSCell::visitChildren(thisObject, visitor);
- size_t storageSize = m_structure->propertyStorageSize();
- for (size_t i = 0; i < storageSize; ++i) {
- JSValue v = JSValue::decode(storage[i]);
- if (!v.marked())
- v.mark();
+ PropertyStorage storage = thisObject->propertyStorage();
+ size_t storageSize = thisObject->structure()->propertyStorageSize();
+ if (thisObject->isUsingInlineStorage())
+ visitor.appendValues(storage, storageSize);
+ else {
+ // We have this extra temp here to slake GCC's thirst for the blood of those who dereference type-punned pointers.
+ void* temp = storage;
+ visitor.copyAndAppend(&temp, thisObject->structure()->propertyStorageCapacity() * sizeof(WriteBarrierBase<Unknown>), storage->slot(), storageSize);
+ storage = static_cast<PropertyStorage>(temp);
+ thisObject->m_propertyStorage.set(storage, StorageBarrier::Unchecked);
}
- JSOBJECT_MARK_END();
-}
+ if (thisObject->m_inheritorID)
+ visitor.append(&thisObject->m_inheritorID);
-UString JSObject::className() const
-{
- const ClassInfo* info = classInfo();
- if (info)
- return info->className;
- return "Object";
+#if !ASSERT_DISABLED
+ visitor.m_isCheckingForDefaultMarkViolation = wasCheckingForDefaultMarkViolation;
+#endif
}
-bool JSObject::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
+UString JSObject::className(const JSObject* object)
{
- return getOwnPropertySlot(exec, Identifier::from(exec, propertyName), slot);
+ const ClassInfo* info = object->classInfo();
+ ASSERT(info);
+ return info->className;
}
-static void throwSetterError(ExecState* exec)
+bool JSObject::getOwnPropertySlotByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, PropertySlot& slot)
{
- throwError(exec, TypeError, "setting a property that has only a getter");
+ JSObject* thisObject = jsCast<JSObject*>(cell);
+ return thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, Identifier::from(exec, propertyName), slot);
}
// ECMA 8.6.2.2
-void JSObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
+void JSObject::put(JSCell* cell, ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
+ JSObject* thisObject = jsCast<JSObject*>(cell);
ASSERT(value);
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- if (propertyName == exec->propertyNames().underscoreProto) {
- // Setting __proto__ to a non-object, non-null value is silently ignored to match Mozilla.
- if (!value.isObject() && !value.isNull())
- return;
-
- JSValue nextPrototypeValue = value;
- while (nextPrototypeValue && nextPrototypeValue.isObject()) {
- JSObject* nextPrototype = asObject(nextPrototypeValue)->unwrappedObject();
- if (nextPrototype == this) {
- throwError(exec, GeneralError, "cyclic __proto__ value");
- return;
- }
- nextPrototypeValue = nextPrototype->prototype();
- }
-
- setPrototype(value);
- return;
- }
+ ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
+ JSGlobalData& globalData = exec->globalData();
// Check if there are any setters or getters in the prototype chain
JSValue prototype;
- for (JSObject* obj = this; !obj->structure()->hasGetterSetterProperties(); obj = asObject(prototype)) {
- prototype = obj->prototype();
- if (prototype.isNull()) {
- putDirectInternal(exec->globalData(), propertyName, value, 0, true, slot);
- return;
+ if (propertyName != exec->propertyNames().underscoreProto) {
+ for (JSObject* obj = thisObject; !obj->structure()->hasReadOnlyOrGetterSetterPropertiesExcludingProto(); obj = asObject(prototype)) {
+ prototype = obj->prototype();
+ if (prototype.isNull()) {
+ if (!thisObject->putDirectInternal<PutModePut>(globalData, propertyName, value, 0, slot, getJSFunction(value)) && slot.isStrictMode())
+ throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
+ return;
+ }
}
}
-
- unsigned attributes;
- JSCell* specificValue;
- if ((m_structure->get(propertyName, attributes, specificValue) != WTF::notFound) && attributes & ReadOnly)
- return;
- for (JSObject* obj = this; ; obj = asObject(prototype)) {
- if (JSValue gs = obj->getDirect(propertyName)) {
+ for (JSObject* obj = thisObject; ; obj = asObject(prototype)) {
+ unsigned attributes;
+ JSCell* specificValue;
+ size_t offset = obj->structure()->get(globalData, propertyName, attributes, specificValue);
+ if (offset != WTF::notFound) {
+ if (attributes & ReadOnly) {
+ if (slot.isStrictMode())
+ throwError(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError));
+ return;
+ }
+
+ JSValue gs = obj->getDirectOffset(offset);
if (gs.isGetterSetter()) {
JSObject* setterFunc = asGetterSetter(gs)->setter();
if (!setterFunc) {
- throwSetterError(exec);
+ if (slot.isStrictMode())
+ throwError(exec, createTypeError(exec, "setting a property that has only a getter"));
return;
}
CallData callData;
- CallType callType = setterFunc->getCallData(callData);
+ CallType callType = setterFunc->methodTable()->getCallData(setterFunc, callData);
MarkedArgumentBuffer args;
args.append(value);
- call(exec, setterFunc, callType, callData, this, args);
+
+ // If this is WebCore's global object then we need to substitute the shell.
+ call(exec, setterFunc, callType, callData, thisObject->methodTable()->toThisObject(thisObject, exec), args);
return;
}
if (prototype.isNull())
break;
}
-
- putDirectInternal(exec->globalData(), propertyName, value, 0, true, slot);
+
+ if (!thisObject->putDirectInternal<PutModePut>(globalData, propertyName, value, 0, slot, getJSFunction(value)) && slot.isStrictMode())
+ throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return;
}
-void JSObject::put(ExecState* exec, unsigned propertyName, JSValue value)
+void JSObject::putByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, JSValue value, bool shouldThrow)
{
+ PutPropertySlot slot(shouldThrow);
+ JSObject* thisObject = jsCast<JSObject*>(cell);
+ thisObject->methodTable()->put(thisObject, exec, Identifier::from(exec, propertyName), value, slot);
+}
+
+void JSObject::putDirectVirtual(JSObject* object, ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes)
+{
+ ASSERT(!value.isGetterSetter() && !(attributes & Accessor));
PutPropertySlot slot;
- put(exec, Identifier::from(exec, propertyName), value, slot);
+ object->putDirectInternal<PutModeDefineOwnProperty>(exec->globalData(), propertyName, value, attributes, slot, getJSFunction(value));
}
-void JSObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes, bool checkReadOnly, PutPropertySlot& slot)
+bool JSObject::setPrototypeWithCycleCheck(JSGlobalData& globalData, JSValue prototype)
{
- putDirectInternal(exec->globalData(), propertyName, value, attributes, checkReadOnly, slot);
+ JSValue checkFor = this;
+ if (this->isGlobalObject())
+ checkFor = jsCast<JSGlobalObject*>(this)->globalExec()->thisValue();
+
+ JSValue nextPrototype = prototype;
+ while (nextPrototype && nextPrototype.isObject()) {
+ if (nextPrototype == checkFor)
+ return false;
+ nextPrototype = asObject(nextPrototype)->prototype();
+ }
+ setPrototype(globalData, prototype);
+ return true;
}
-void JSObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes)
+bool JSObject::allowsAccessFrom(ExecState* exec)
{
- putDirectInternal(exec->globalData(), propertyName, value, attributes);
+ JSGlobalObject* globalObject = isGlobalThis() ? jsCast<JSGlobalThis*>(this)->unwrappedObject() : this->globalObject();
+ return globalObject->globalObjectMethodTable()->allowsAccessFrom(globalObject, exec);
}
-void JSObject::putWithAttributes(ExecState* exec, unsigned propertyName, JSValue value, unsigned attributes)
+void JSObject::putDirectAccessor(JSGlobalData& globalData, const Identifier& propertyName, JSValue value, unsigned attributes)
{
- putWithAttributes(exec, Identifier::from(exec, propertyName), value, attributes);
+ ASSERT(value.isGetterSetter() && (attributes & Accessor));
+
+ PutPropertySlot slot;
+ putDirectInternal<PutModeDefineOwnProperty>(globalData, propertyName, value, attributes, slot, getJSFunction(value));
+
+ // putDirect will change our Structure if we add a new property. For
+ // getters and setters, though, we also need to change our Structure
+ // if we override an existing non-getter or non-setter.
+ if (slot.type() != PutPropertySlot::NewProperty)
+ setStructure(globalData, Structure::attributeChangeTransition(globalData, structure(), propertyName, attributes));
+
+ if (attributes & ReadOnly)
+ structure()->setContainsReadOnlyProperties();
+
+ structure()->setHasGetterSetterProperties(propertyName == globalData.propertyNames->underscoreProto);
}
bool JSObject::hasProperty(ExecState* exec, const Identifier& propertyName) const
}
// ECMA 8.6.2.5
-bool JSObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
+bool JSObject::deleteProperty(JSCell* cell, ExecState* exec, const Identifier& propertyName)
{
+ JSObject* thisObject = jsCast<JSObject*>(cell);
+
+ if (!thisObject->staticFunctionsReified())
+ thisObject->reifyStaticFunctionsForDelete(exec);
+
unsigned attributes;
JSCell* specificValue;
- if (m_structure->get(propertyName, attributes, specificValue) != WTF::notFound) {
- if ((attributes & DontDelete))
+ if (thisObject->structure()->get(exec->globalData(), propertyName, attributes, specificValue) != WTF::notFound) {
+ if (attributes & DontDelete && !exec->globalData().isInDefineOwnProperty())
return false;
- removeDirect(propertyName);
+ thisObject->removeDirect(exec->globalData(), propertyName);
return true;
}
// Look in the static hashtable of properties
- const HashEntry* entry = findPropertyHashEntry(exec, propertyName);
- if (entry && entry->attributes() & DontDelete)
+ const HashEntry* entry = thisObject->findPropertyHashEntry(exec, propertyName);
+ if (entry && entry->attributes() & DontDelete && !exec->globalData().isInDefineOwnProperty())
return false; // this builtin property can't be deleted
// FIXME: Should the code here actually do some deletion?
bool JSObject::hasOwnProperty(ExecState* exec, const Identifier& propertyName) const
{
PropertySlot slot;
- return const_cast<JSObject*>(this)->getOwnPropertySlot(exec, propertyName, slot);
+ return const_cast<JSObject*>(this)->methodTable()->getOwnPropertySlot(const_cast<JSObject*>(this), exec, propertyName, slot);
}
-bool JSObject::deleteProperty(ExecState* exec, unsigned propertyName)
+bool JSObject::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned propertyName)
{
- return deleteProperty(exec, Identifier::from(exec, propertyName));
+ JSObject* thisObject = jsCast<JSObject*>(cell);
+ return thisObject->methodTable()->deleteProperty(thisObject, exec, Identifier::from(exec, propertyName));
}
static ALWAYS_INLINE JSValue callDefaultValueFunction(ExecState* exec, const JSObject* object, const Identifier& propertyName)
{
JSValue function = object->get(exec, propertyName);
CallData callData;
- CallType callType = function.getCallData(callData);
+ CallType callType = getCallData(function, callData);
if (callType == CallTypeNone)
return exec->exception();
return result;
}
-bool JSObject::getPrimitiveNumber(ExecState* exec, double& number, JSValue& result)
+bool JSObject::getPrimitiveNumber(ExecState* exec, double& number, JSValue& result) const
{
- result = defaultValue(exec, PreferNumber);
+ result = methodTable()->defaultValue(this, exec, PreferNumber);
number = result.toNumber(exec);
return !result.isString();
}
// ECMA 8.6.2.6
-JSValue JSObject::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
+JSValue JSObject::defaultValue(const JSObject* object, ExecState* exec, PreferredPrimitiveType hint)
{
// Must call toString first for Date objects.
- if ((hint == PreferString) || (hint != PreferNumber && prototype() == exec->lexicalGlobalObject()->datePrototype())) {
- JSValue value = callDefaultValueFunction(exec, this, exec->propertyNames().toString);
+ if ((hint == PreferString) || (hint != PreferNumber && object->prototype() == exec->lexicalGlobalObject()->datePrototype())) {
+ JSValue value = callDefaultValueFunction(exec, object, exec->propertyNames().toString);
if (value)
return value;
- value = callDefaultValueFunction(exec, this, exec->propertyNames().valueOf);
+ value = callDefaultValueFunction(exec, object, exec->propertyNames().valueOf);
if (value)
return value;
} else {
- JSValue value = callDefaultValueFunction(exec, this, exec->propertyNames().valueOf);
+ JSValue value = callDefaultValueFunction(exec, object, exec->propertyNames().valueOf);
if (value)
return value;
- value = callDefaultValueFunction(exec, this, exec->propertyNames().toString);
+ value = callDefaultValueFunction(exec, object, exec->propertyNames().toString);
if (value)
return value;
}
ASSERT(!exec->hadException());
- return throwError(exec, TypeError, "No default value");
+ return throwError(exec, createTypeError(exec, "No default value"));
}
const HashEntry* JSObject::findPropertyHashEntry(ExecState* exec, const Identifier& propertyName) const
return 0;
}
-void JSObject::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunction)
-{
- JSValue object = getDirect(propertyName);
- if (object && object.isGetterSetter()) {
- ASSERT(m_structure->hasGetterSetterProperties());
- asGetterSetter(object)->setGetter(getterFunction);
- return;
- }
-
- PutPropertySlot slot;
- GetterSetter* getterSetter = new (exec) GetterSetter;
- putDirectInternal(exec->globalData(), propertyName, getterSetter, Getter, true, slot);
-
- // putDirect will change our Structure if we add a new property. For
- // getters and setters, though, we also need to change our Structure
- // if we override an existing non-getter or non-setter.
- if (slot.type() != PutPropertySlot::NewProperty) {
- if (!m_structure->isDictionary()) {
- RefPtr<Structure> structure = Structure::getterSetterTransition(m_structure);
- setStructure(structure.release());
- }
- }
-
- m_structure->setHasGetterSetterProperties(true);
- getterSetter->setGetter(getterFunction);
-}
-
-void JSObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunction)
-{
- JSValue object = getDirect(propertyName);
- if (object && object.isGetterSetter()) {
- ASSERT(m_structure->hasGetterSetterProperties());
- asGetterSetter(object)->setSetter(setterFunction);
- return;
- }
-
- PutPropertySlot slot;
- GetterSetter* getterSetter = new (exec) GetterSetter;
- putDirectInternal(exec->globalData(), propertyName, getterSetter, Setter, true, slot);
-
- // putDirect will change our Structure if we add a new property. For
- // getters and setters, though, we also need to change our Structure
- // if we override an existing non-getter or non-setter.
- if (slot.type() != PutPropertySlot::NewProperty) {
- if (!m_structure->isDictionary()) {
- RefPtr<Structure> structure = Structure::getterSetterTransition(m_structure);
- setStructure(structure.release());
- }
- }
-
- m_structure->setHasGetterSetterProperties(true);
- getterSetter->setSetter(setterFunction);
-}
-
-JSValue JSObject::lookupGetter(ExecState*, const Identifier& propertyName)
-{
- JSObject* object = this;
- while (true) {
- if (JSValue value = object->getDirect(propertyName)) {
- if (!value.isGetterSetter())
- return jsUndefined();
- JSObject* functionObject = asGetterSetter(value)->getter();
- if (!functionObject)
- return jsUndefined();
- return functionObject;
- }
-
- if (!object->prototype() || !object->prototype().isObject())
- return jsUndefined();
- object = asObject(object->prototype());
- }
-}
-
-JSValue JSObject::lookupSetter(ExecState*, const Identifier& propertyName)
-{
- JSObject* object = this;
- while (true) {
- if (JSValue value = object->getDirect(propertyName)) {
- if (!value.isGetterSetter())
- return jsUndefined();
- JSObject* functionObject = asGetterSetter(value)->setter();
- if (!functionObject)
- return jsUndefined();
- return functionObject;
- }
-
- if (!object->prototype() || !object->prototype().isObject())
- return jsUndefined();
- object = asObject(object->prototype());
- }
-}
-
-bool JSObject::hasInstance(ExecState* exec, JSValue value, JSValue proto)
+bool JSObject::hasInstance(JSObject*, ExecState* exec, JSValue value, JSValue proto)
{
if (!value.isObject())
return false;
if (!proto.isObject()) {
- throwError(exec, TypeError, "instanceof called on an object with an invalid prototype property.");
+ throwError(exec, createTypeError(exec, "instanceof called on an object with an invalid prototype property."));
return false;
}
bool JSObject::propertyIsEnumerable(ExecState* exec, const Identifier& propertyName) const
{
- unsigned attributes;
- if (!getPropertyAttributes(exec, propertyName, attributes))
+ PropertyDescriptor descriptor;
+ if (!const_cast<JSObject*>(this)->methodTable()->getOwnPropertyDescriptor(const_cast<JSObject*>(this), exec, propertyName, descriptor))
return false;
- return !(attributes & DontEnum);
+ return descriptor.enumerable();
}
-bool JSObject::getPropertyAttributes(ExecState* exec, const Identifier& propertyName, unsigned& attributes) const
-{
- JSCell* specificValue;
- if (m_structure->get(propertyName, attributes, specificValue) != WTF::notFound)
- return true;
-
- // Look in the static hashtable of properties
- const HashEntry* entry = findPropertyHashEntry(exec, propertyName);
- if (entry) {
- attributes = entry->attributes();
- return true;
- }
-
- return false;
-}
-
-bool JSObject::getPropertySpecificValue(ExecState*, const Identifier& propertyName, JSCell*& specificValue) const
+bool JSObject::getPropertySpecificValue(ExecState* exec, const Identifier& propertyName, JSCell*& specificValue) const
{
unsigned attributes;
- if (m_structure->get(propertyName, attributes, specificValue) != WTF::notFound)
+ if (structure()->get(exec->globalData(), propertyName, attributes, specificValue) != WTF::notFound)
return true;
// This could be a function within the static table? - should probably
return false;
}
-void JSObject::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
+void JSObject::getPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+ object->methodTable()->getOwnPropertyNames(object, exec, propertyNames, mode);
+
+ if (object->prototype().isNull())
+ return;
+
+ JSObject* prototype = asObject(object->prototype());
+ while(1) {
+ if (prototype->structure()->typeInfo().overridesGetPropertyNames()) {
+ prototype->methodTable()->getPropertyNames(prototype, exec, propertyNames, mode);
+ break;
+ }
+ prototype->methodTable()->getOwnPropertyNames(prototype, exec, propertyNames, mode);
+ JSValue nextProto = prototype->prototype();
+ if (nextProto.isNull())
+ break;
+ prototype = asObject(nextProto);
+ }
+}
+
+void JSObject::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
- m_structure->getEnumerablePropertyNames(exec, propertyNames, this);
+ object->structure()->getPropertyNamesFromStructure(exec->globalData(), propertyNames, mode);
+ if (!object->staticFunctionsReified())
+ getClassPropertyNames(exec, object->classInfo(), propertyNames, mode);
}
bool JSObject::toBoolean(ExecState*) const
return primitive.toNumber(exec);
}
-UString JSObject::toString(ExecState* exec) const
+JSString* JSObject::toString(ExecState* exec) const
{
JSValue primitive = toPrimitive(exec, PreferString);
if (exec->hadException())
- return "";
+ return jsEmptyString(exec);
return primitive.toString(exec);
}
-JSObject* JSObject::toObject(ExecState*) const
+JSObject* JSObject::toThisObject(JSCell* cell, ExecState*)
{
- return const_cast<JSObject*>(this);
+ return jsCast<JSObject*>(cell);
}
-JSObject* JSObject::toThisObject(ExecState*) const
+JSObject* JSObject::unwrappedObject()
{
- return const_cast<JSObject*>(this);
+ if (isGlobalThis())
+ return jsCast<JSGlobalThis*>(this)->unwrappedObject();
+ return this;
}
-JSObject* JSObject::unwrappedObject()
+void JSObject::seal(JSGlobalData& globalData)
{
- return this;
+ if (isSealed(globalData))
+ return;
+ preventExtensions(globalData);
+ setStructure(globalData, Structure::sealTransition(globalData, structure()));
+}
+
+void JSObject::freeze(JSGlobalData& globalData)
+{
+ if (isFrozen(globalData))
+ return;
+ preventExtensions(globalData);
+ setStructure(globalData, Structure::freezeTransition(globalData, structure()));
+}
+
+void JSObject::preventExtensions(JSGlobalData& globalData)
+{
+ if (isJSArray(this))
+ asArray(this)->enterDictionaryMode(globalData);
+ if (isExtensible())
+ setStructure(globalData, Structure::preventExtensionsTransition(globalData, structure()));
+}
+
+// This presently will flatten to an uncachable dictionary; this is suitable
+// for use in delete, we may want to do something different elsewhere.
+void JSObject::reifyStaticFunctionsForDelete(ExecState* exec)
+{
+ ASSERT(!staticFunctionsReified());
+ JSGlobalData& globalData = exec->globalData();
+
+ // If this object's ClassInfo has no static properties, then nothing to reify!
+ // We can safely set the flag to avoid the expensive check again in the future.
+ if (!classInfo()->hasStaticProperties()) {
+ structure()->setStaticFunctionsReified();
+ return;
+ }
+
+ if (!structure()->isUncacheableDictionary())
+ setStructure(globalData, Structure::toUncacheableDictionaryTransition(globalData, structure()));
+
+ for (const ClassInfo* info = classInfo(); info; info = info->parentClass) {
+ const HashTable* hashTable = info->propHashTable(globalObject()->globalExec());
+ if (!hashTable)
+ continue;
+ PropertySlot slot;
+ for (HashTable::ConstIterator iter = hashTable->begin(globalData); iter != hashTable->end(globalData); ++iter) {
+ if (iter->attributes() & Function)
+ setUpStaticFunctionSlot(globalObject()->globalExec(), *iter, this, Identifier(&globalData, iter->key()), slot);
+ }
+ }
+
+ structure()->setStaticFunctionsReified();
}
-void JSObject::removeDirect(const Identifier& propertyName)
+void JSObject::removeDirect(JSGlobalData& globalData, const Identifier& propertyName)
{
+ if (structure()->get(globalData, propertyName) == WTF::notFound)
+ return;
+
size_t offset;
- if (m_structure->isUncacheableDictionary()) {
- offset = m_structure->removePropertyWithoutTransition(propertyName);
+ if (structure()->isUncacheableDictionary()) {
+ offset = structure()->removePropertyWithoutTransition(globalData, propertyName);
if (offset != WTF::notFound)
- putDirectOffset(offset, jsUndefined());
+ putUndefinedAtDirectOffset(offset);
return;
}
- RefPtr<Structure> structure = Structure::removePropertyTransition(m_structure, propertyName, offset);
- setStructure(structure.release());
+ setStructure(globalData, Structure::removePropertyTransition(globalData, structure(), propertyName, offset));
if (offset != WTF::notFound)
- putDirectOffset(offset, jsUndefined());
+ putUndefinedAtDirectOffset(offset);
}
-void JSObject::putDirectFunction(ExecState* exec, InternalFunction* function, unsigned attr)
+NEVER_INLINE void JSObject::fillGetterPropertySlot(PropertySlot& slot, WriteBarrierBase<Unknown>* location)
{
- putDirectFunction(Identifier(exec, function->name(&exec->globalData())), function, attr);
+ if (JSObject* getterFunction = asGetterSetter(location->get())->getter()) {
+ if (!structure()->isDictionary())
+ slot.setCacheableGetterSlot(this, getterFunction, offsetForLocation(location));
+ else
+ slot.setGetterSlot(getterFunction);
+ } else
+ slot.setUndefined();
}
-void JSObject::putDirectFunctionWithoutTransition(ExecState* exec, InternalFunction* function, unsigned attr)
+Structure* JSObject::createInheritorID(JSGlobalData& globalData)
{
- putDirectFunctionWithoutTransition(Identifier(exec, function->name(&exec->globalData())), function, attr);
+ JSGlobalObject* globalObject;
+ if (isGlobalThis())
+ globalObject = static_cast<JSGlobalThis*>(this)->unwrappedObject();
+ else
+ globalObject = structure()->globalObject();
+ ASSERT(globalObject);
+ m_inheritorID.set(globalData, this, createEmptyObjectStructure(globalData, globalObject, this));
+ ASSERT(m_inheritorID->isEmpty());
+ return m_inheritorID.get();
}
-NEVER_INLINE void JSObject::fillGetterPropertySlot(PropertySlot& slot, JSValue* location)
+PropertyStorage JSObject::growPropertyStorage(JSGlobalData& globalData, size_t oldSize, size_t newSize)
{
- if (JSObject* getterFunction = asGetterSetter(*location)->getter())
- slot.setGetterSlot(getterFunction);
- else
- slot.setUndefined();
+ ASSERT(newSize > oldSize);
+
+ // It's important that this function not rely on structure(), since
+ // we might be in the middle of a transition.
+
+ PropertyStorage oldPropertyStorage = m_propertyStorage.get();
+ PropertyStorage newPropertyStorage = 0;
+
+ if (isUsingInlineStorage()) {
+ // We have this extra temp here to slake GCC's thirst for the blood of those who dereference type-punned pointers.
+ void* temp = newPropertyStorage;
+ if (!globalData.heap.tryAllocateStorage(sizeof(WriteBarrierBase<Unknown>) * newSize, &temp))
+ CRASH();
+ newPropertyStorage = static_cast<PropertyStorage>(temp);
+
+ for (unsigned i = 0; i < oldSize; ++i)
+ newPropertyStorage[i] = oldPropertyStorage[i];
+ } else {
+ // We have this extra temp here to slake GCC's thirst for the blood of those who dereference type-punned pointers.
+ void* temp = oldPropertyStorage;
+ if (!globalData.heap.tryReallocateStorage(&temp, sizeof(WriteBarrierBase<Unknown>) * oldSize, sizeof(WriteBarrierBase<Unknown>) * newSize))
+ CRASH();
+ newPropertyStorage = static_cast<PropertyStorage>(temp);
+ }
+
+ ASSERT(newPropertyStorage);
+ return newPropertyStorage;
}
-Structure* JSObject::createInheritorID()
+bool JSObject::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
- m_inheritorID = JSObject::createStructure(this);
- return m_inheritorID.get();
+ unsigned attributes = 0;
+ JSCell* cell = 0;
+ size_t offset = object->structure()->get(exec->globalData(), propertyName, attributes, cell);
+ if (offset == WTF::notFound)
+ return false;
+ descriptor.setDescriptor(object->getDirectOffset(offset), attributes);
+ return true;
+}
+
+bool JSObject::getPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
+{
+ JSObject* object = this;
+ while (true) {
+ if (object->methodTable()->getOwnPropertyDescriptor(object, exec, propertyName, descriptor))
+ return true;
+ JSValue prototype = object->prototype();
+ if (!prototype.isObject())
+ return false;
+ object = asObject(prototype);
+ }
}
-void JSObject::allocatePropertyStorage(size_t oldSize, size_t newSize)
+static bool putDescriptor(ExecState* exec, JSObject* target, const Identifier& propertyName, PropertyDescriptor& descriptor, unsigned attributes, const PropertyDescriptor& oldDescriptor)
{
- allocatePropertyStorageInline(oldSize, newSize);
+ if (descriptor.isGenericDescriptor() || descriptor.isDataDescriptor()) {
+ if (descriptor.isGenericDescriptor() && oldDescriptor.isAccessorDescriptor()) {
+ GetterSetter* accessor = GetterSetter::create(exec);
+ if (oldDescriptor.getterPresent())
+ accessor->setGetter(exec->globalData(), oldDescriptor.getterObject());
+ if (oldDescriptor.setterPresent())
+ accessor->setSetter(exec->globalData(), oldDescriptor.setterObject());
+ target->putDirectAccessor(exec->globalData(), propertyName, accessor, attributes | Accessor);
+ return true;
+ }
+ JSValue newValue = jsUndefined();
+ if (descriptor.value())
+ newValue = descriptor.value();
+ else if (oldDescriptor.value())
+ newValue = oldDescriptor.value();
+ target->putDirect(exec->globalData(), propertyName, newValue, attributes & ~Accessor);
+ if (attributes & ReadOnly)
+ target->structure()->setContainsReadOnlyProperties();
+ return true;
+ }
+ attributes &= ~ReadOnly;
+ GetterSetter* accessor = GetterSetter::create(exec);
+
+ if (descriptor.getterPresent())
+ accessor->setGetter(exec->globalData(), descriptor.getterObject());
+ else if (oldDescriptor.getterPresent())
+ accessor->setGetter(exec->globalData(), oldDescriptor.getterObject());
+ if (descriptor.setterPresent())
+ accessor->setSetter(exec->globalData(), descriptor.setterObject());
+ else if (oldDescriptor.setterPresent())
+ accessor->setSetter(exec->globalData(), oldDescriptor.setterObject());
+
+ target->putDirectAccessor(exec->globalData(), propertyName, accessor, attributes | Accessor);
+ return true;
+}
+
+class DefineOwnPropertyScope {
+public:
+ DefineOwnPropertyScope(ExecState* exec)
+ : m_globalData(exec->globalData())
+ {
+ m_globalData.setInDefineOwnProperty(true);
+ }
+
+ ~DefineOwnPropertyScope()
+ {
+ m_globalData.setInDefineOwnProperty(false);
+ }
+
+private:
+ JSGlobalData& m_globalData;
+};
+
+bool JSObject::defineOwnProperty(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor, bool throwException)
+{
+ // Track on the globaldata that we're in define property.
+ // Currently DefineOwnProperty uses delete to remove properties when they are being replaced
+ // (particularly when changing attributes), however delete won't allow non-configurable (i.e.
+ // DontDelete) properties to be deleted. For now, we can use this flag to make this work.
+ DefineOwnPropertyScope scope(exec);
+
+ // If we have a new property we can just put it on normally
+ PropertyDescriptor current;
+ if (!object->methodTable()->getOwnPropertyDescriptor(object, exec, propertyName, current)) {
+ // unless extensions are prevented!
+ if (!object->isExtensible()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to define property on object that is not extensible."));
+ return false;
+ }
+ PropertyDescriptor oldDescriptor;
+ oldDescriptor.setValue(jsUndefined());
+ return putDescriptor(exec, object, propertyName, descriptor, descriptor.attributes(), oldDescriptor);
+ }
+
+ if (descriptor.isEmpty())
+ return true;
+
+ if (current.equalTo(exec, descriptor))
+ return true;
+
+ // Filter out invalid changes
+ if (!current.configurable()) {
+ if (descriptor.configurable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to configurable attribute of unconfigurable property."));
+ return false;
+ }
+ if (descriptor.enumerablePresent() && descriptor.enumerable() != current.enumerable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change enumerable attribute of unconfigurable property."));
+ return false;
+ }
+ }
+
+ // A generic descriptor is simply changing the attributes of an existing property
+ if (descriptor.isGenericDescriptor()) {
+ if (!current.attributesEqual(descriptor)) {
+ object->methodTable()->deleteProperty(object, exec, propertyName);
+ return putDescriptor(exec, object, propertyName, descriptor, descriptor.attributesOverridingCurrent(current), current);
+ }
+ return true;
+ }
+
+ // Changing between a normal property or an accessor property
+ if (descriptor.isDataDescriptor() != current.isDataDescriptor()) {
+ if (!current.configurable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change access mechanism for an unconfigurable property."));
+ return false;
+ }
+ object->methodTable()->deleteProperty(object, exec, propertyName);
+ return putDescriptor(exec, object, propertyName, descriptor, descriptor.attributesOverridingCurrent(current), current);
+ }
+
+ // Changing the value and attributes of an existing property
+ if (descriptor.isDataDescriptor()) {
+ if (!current.configurable()) {
+ if (!current.writable() && descriptor.writable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change writable attribute of unconfigurable property."));
+ return false;
+ }
+ if (!current.writable()) {
+ if (descriptor.value() && !sameValue(exec, current.value(), descriptor.value())) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change value of a readonly property."));
+ return false;
+ }
+ }
+ }
+ if (current.attributesEqual(descriptor) && !descriptor.value())
+ return true;
+ object->methodTable()->deleteProperty(object, exec, propertyName);
+ return putDescriptor(exec, object, propertyName, descriptor, descriptor.attributesOverridingCurrent(current), current);
+ }
+
+ // Changing the accessor functions of an existing accessor property
+ ASSERT(descriptor.isAccessorDescriptor());
+ if (!current.configurable()) {
+ if (descriptor.setterPresent() && !(current.setterPresent() && JSValue::strictEqual(exec, current.setter(), descriptor.setter()))) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change the setter of an unconfigurable property."));
+ return false;
+ }
+ if (descriptor.getterPresent() && !(current.getterPresent() && JSValue::strictEqual(exec, current.getter(), descriptor.getter()))) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change the getter of an unconfigurable property."));
+ return false;
+ }
+ }
+ JSValue accessor = object->getDirect(exec->globalData(), propertyName);
+ if (!accessor)
+ return false;
+ GetterSetter* getterSetter = asGetterSetter(accessor);
+ if (descriptor.setterPresent())
+ getterSetter->setSetter(exec->globalData(), descriptor.setterObject());
+ if (descriptor.getterPresent())
+ getterSetter->setGetter(exec->globalData(), descriptor.getterObject());
+ if (current.attributesEqual(descriptor))
+ return true;
+ object->methodTable()->deleteProperty(object, exec, propertyName);
+ unsigned attrs = descriptor.attributesOverridingCurrent(current);
+ object->putDirectAccessor(exec->globalData(), propertyName, getterSetter, attrs | Accessor);
+ return true;
}
-JSObject* constructEmptyObject(ExecState* exec)
+JSObject* throwTypeError(ExecState* exec, const UString& message)
{
- return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure());
+ return throwError(exec, createTypeError(exec, message));
}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff