webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 665 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/API/JSObjectRef.cpp b/Source/JavaScriptCore/API/JSObjectRef.cpp
new file mode 100644
index 000000000..e05fbbbdd
--- /dev/null
+++ b/Source/JavaScriptCore/API/JSObjectRef.cpp
@@ -0,0 +1,665 @@
+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Kelvin W Sherlock (ksherlock@gmail.com)
+ *
+ * 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 "JSObjectRef.h"
+#include "JSObjectRefPrivate.h"
+
+#include "APICast.h"
+#include "ButterflyInlines.h"
+#include "CodeBlock.h"
+#include "CopiedSpaceInlines.h"
+#include "DateConstructor.h"
+#include "ErrorConstructor.h"
+#include "Exception.h"
+#include "FunctionConstructor.h"
+#include "Identifier.h"
+#include "InitializeThreading.h"
+#include "JSAPIWrapperObject.h"
+#include "JSArray.h"
+#include "JSCallbackConstructor.h"
+#include "JSCallbackFunction.h"
+#include "JSCallbackObject.h"
+#include "JSClassRef.h"
+#include "JSFunction.h"
+#include "JSGlobalObject.h"
+#include "JSObject.h"
+#include "JSRetainPtr.h"
+#include "JSString.h"
+#include "JSValueRef.h"
+#include "ObjectConstructor.h"
+#include "ObjectPrototype.h"
+#include "JSCInlines.h"
+#include "PropertyNameArray.h"
+#include "RegExpConstructor.h"
+
+#if ENABLE(REMOTE_INSPECTOR)
+#include "JSGlobalObjectInspectorController.h"
+#endif
+
+using namespace JSC;
+
+enum class ExceptionStatus {
+    DidThrow,
+    DidNotThrow
+};
+
+static ExceptionStatus handleExceptionIfNeeded(ExecState* exec, JSValueRef* returnedExceptionRef)
+{
+    if (exec->hadException()) {
+        Exception* exception = exec->exception();
+        if (returnedExceptionRef)
+            *returnedExceptionRef = toRef(exec, exception->value());
+        exec->clearException();
+#if ENABLE(REMOTE_INSPECTOR)
+        exec->vmEntryGlobalObject()->inspectorController().reportAPIException(exec, exception);
+#endif
+        return ExceptionStatus::DidThrow;
+    }
+    return ExceptionStatus::DidNotThrow;
+}
+
+JSClassRef JSClassCreate(const JSClassDefinition* definition)
+{
+    initializeThreading();
+    RefPtr<OpaqueJSClass> jsClass = (definition->attributes & kJSClassAttributeNoAutomaticPrototype)
+        ? OpaqueJSClass::createNoAutomaticPrototype(definition)
+        : OpaqueJSClass::create(definition);
+    
+    return jsClass.release().leakRef();
+}
+
+JSClassRef JSClassRetain(JSClassRef jsClass)
+{
+    jsClass->ref();
+    return jsClass;
+}
+
+void JSClassRelease(JSClassRef jsClass)
+{
+    jsClass->deref();
+}
+
+JSObjectRef JSObjectMake(JSContextRef ctx, JSClassRef jsClass, void* data)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    if (!jsClass)
+        return toRef(constructEmptyObject(exec));
+
+    JSCallbackObject<JSDestructibleObject>* object = JSCallbackObject<JSDestructibleObject>::create(exec, exec->lexicalGlobalObject(), exec->lexicalGlobalObject()->callbackObjectStructure(), jsClass, data);
+    if (JSObject* prototype = jsClass->prototype(exec))
+        object->setPrototype(exec->vm(), prototype);
+
+    return toRef(object);
+}
+
+JSObjectRef JSObjectMakeFunctionWithCallback(JSContextRef ctx, JSStringRef name, JSObjectCallAsFunctionCallback callAsFunction)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+    return toRef(JSCallbackFunction::create(exec->vm(), exec->lexicalGlobalObject(), callAsFunction, name ? name->string() : ASCIILiteral("anonymous")));
+}
+
+JSObjectRef JSObjectMakeConstructor(JSContextRef ctx, JSClassRef jsClass, JSObjectCallAsConstructorCallback callAsConstructor)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSValue jsPrototype = jsClass ? jsClass->prototype(exec) : 0;
+    if (!jsPrototype)
+        jsPrototype = exec->lexicalGlobalObject()->objectPrototype();
+
+    JSCallbackConstructor* constructor = JSCallbackConstructor::create(exec, exec->lexicalGlobalObject(), exec->lexicalGlobalObject()->callbackConstructorStructure(), jsClass, callAsConstructor);
+    constructor->putDirect(exec->vm(), exec->propertyNames().prototype, jsPrototype, DontEnum | DontDelete | ReadOnly);
+    return toRef(constructor);
+}
+
+JSObjectRef JSObjectMakeFunction(JSContextRef ctx, JSStringRef name, unsigned parameterCount, const JSStringRef parameterNames[], JSStringRef body, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    startingLineNumber = std::max(1, startingLineNumber);
+    Identifier nameID = name ? name->identifier(&exec->vm()) : Identifier::fromString(exec, "anonymous");
+    
+    MarkedArgumentBuffer args;
+    for (unsigned i = 0; i < parameterCount; i++)
+        args.append(jsString(exec, parameterNames[i]->string()));
+    args.append(jsString(exec, body->string()));
+
+    JSObject* result = constructFunction(exec, exec->lexicalGlobalObject(), args, nameID, sourceURL ? sourceURL->string() : String(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()));
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+    return toRef(result);
+}
+
+JSObjectRef JSObjectMakeArray(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* result;
+    if (argumentCount) {
+        MarkedArgumentBuffer argList;
+        for (size_t i = 0; i < argumentCount; ++i)
+            argList.append(toJS(exec, arguments[i]));
+
+        result = constructArray(exec, static_cast<ArrayAllocationProfile*>(0), argList);
+    } else
+        result = constructEmptyArray(exec, 0);
+
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+
+    return toRef(result);
+}
+
+JSObjectRef JSObjectMakeDate(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    MarkedArgumentBuffer argList;
+    for (size_t i = 0; i < argumentCount; ++i)
+        argList.append(toJS(exec, arguments[i]));
+
+    JSObject* result = constructDate(exec, exec->lexicalGlobalObject(), argList);
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+
+    return toRef(result);
+}
+
+JSObjectRef JSObjectMakeError(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSValue message = argumentCount ? toJS(exec, arguments[0]) : jsUndefined();
+    Structure* errorStructure = exec->lexicalGlobalObject()->errorStructure();
+    JSObject* result = ErrorInstance::create(exec, errorStructure, message);
+
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+
+    return toRef(result);
+}
+
+JSObjectRef JSObjectMakeRegExp(JSContextRef ctx, size_t argumentCount, const JSValueRef arguments[],  JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    MarkedArgumentBuffer argList;
+    for (size_t i = 0; i < argumentCount; ++i)
+        argList.append(toJS(exec, arguments[i]));
+
+    JSObject* result = constructRegExp(exec, exec->lexicalGlobalObject(),  argList);
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+    
+    return toRef(result);
+}
+
+JSValueRef JSObjectGetPrototype(JSContextRef ctx, JSObjectRef object)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+    return toRef(exec, jsObject->prototype());
+}
+
+void JSObjectSetPrototype(JSContextRef ctx, JSObjectRef object, JSValueRef value)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+    JSValue jsValue = toJS(exec, value);
+
+    if (JSProxy* proxy = jsDynamicCast<JSProxy*>(jsObject)) {
+        if (JSGlobalObject* globalObject = jsDynamicCast<JSGlobalObject*>(proxy->target())) {
+            globalObject->resetPrototype(exec->vm(), jsValue.isObject() ? jsValue : jsNull());
+            return;
+        }
+        // Someday we might use proxies for something other than JSGlobalObjects, but today is not that day.
+        RELEASE_ASSERT_NOT_REACHED();
+    }
+    jsObject->setPrototypeWithCycleCheck(exec, jsValue.isObject() ? jsValue : jsNull());
+}
+
+bool JSObjectHasProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return false;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+    
+    return jsObject->hasProperty(exec, propertyName->identifier(&exec->vm()));
+}
+
+JSValueRef JSObjectGetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+
+    JSValue jsValue = jsObject->get(exec, propertyName->identifier(&exec->vm()));
+    handleExceptionIfNeeded(exec, exception);
+    return toRef(exec, jsValue);
+}
+
+void JSObjectSetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef value, JSPropertyAttributes attributes, JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+    Identifier name(propertyName->identifier(&exec->vm()));
+    JSValue jsValue = toJS(exec, value);
+
+    if (attributes && !jsObject->hasProperty(exec, name)) {
+        PropertyDescriptor desc(jsValue, attributes);
+        jsObject->methodTable()->defineOwnProperty(jsObject, exec, name, desc, false);
+    } else {
+        PutPropertySlot slot(jsObject);
+        jsObject->methodTable()->put(jsObject, exec, name, jsValue, slot);
+    }
+
+    handleExceptionIfNeeded(exec, exception);
+}
+
+JSValueRef JSObjectGetPropertyAtIndex(JSContextRef ctx, JSObjectRef object, unsigned propertyIndex, JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+
+    JSValue jsValue = jsObject->get(exec, propertyIndex);
+    handleExceptionIfNeeded(exec, exception);
+    return toRef(exec, jsValue);
+}
+
+
+void JSObjectSetPropertyAtIndex(JSContextRef ctx, JSObjectRef object, unsigned propertyIndex, JSValueRef value, JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+    JSValue jsValue = toJS(exec, value);
+    
+    jsObject->methodTable()->putByIndex(jsObject, exec, propertyIndex, jsValue, false);
+    handleExceptionIfNeeded(exec, exception);
+}
+
+bool JSObjectDeleteProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef* exception)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return false;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    JSObject* jsObject = toJS(object);
+
+    bool result = jsObject->methodTable()->deleteProperty(jsObject, exec, propertyName->identifier(&exec->vm()));
+    handleExceptionIfNeeded(exec, exception);
+    return result;
+}
+
+void* JSObjectGetPrivate(JSObjectRef object)
+{
+    JSObject* jsObject = uncheckedToJS(object);
+
+    // Get wrapped object if proxied
+    if (jsObject->inherits(JSProxy::info()))
+        jsObject = jsCast<JSProxy*>(jsObject)->target();
+
+    if (jsObject->inherits(JSCallbackObject<JSGlobalObject>::info()))
+        return jsCast<JSCallbackObject<JSGlobalObject>*>(jsObject)->getPrivate();
+    if (jsObject->inherits(JSCallbackObject<JSDestructibleObject>::info()))
+        return jsCast<JSCallbackObject<JSDestructibleObject>*>(jsObject)->getPrivate();
+#if JSC_OBJC_API_ENABLED
+    if (jsObject->inherits(JSCallbackObject<JSAPIWrapperObject>::info()))
+        return jsCast<JSCallbackObject<JSAPIWrapperObject>*>(jsObject)->getPrivate();
+#endif
+    
+    return 0;
+}
+
+bool JSObjectSetPrivate(JSObjectRef object, void* data)
+{
+    JSObject* jsObject = uncheckedToJS(object);
+
+    // Get wrapped object if proxied
+    if (jsObject->inherits(JSProxy::info()))
+        jsObject = jsCast<JSProxy*>(jsObject)->target();
+
+    if (jsObject->inherits(JSCallbackObject<JSGlobalObject>::info())) {
+        jsCast<JSCallbackObject<JSGlobalObject>*>(jsObject)->setPrivate(data);
+        return true;
+    }
+    if (jsObject->inherits(JSCallbackObject<JSDestructibleObject>::info())) {
+        jsCast<JSCallbackObject<JSDestructibleObject>*>(jsObject)->setPrivate(data);
+        return true;
+    }
+#if JSC_OBJC_API_ENABLED
+    if (jsObject->inherits(JSCallbackObject<JSAPIWrapperObject>::info())) {
+        jsCast<JSCallbackObject<JSAPIWrapperObject>*>(jsObject)->setPrivate(data);
+        return true;
+    }
+#endif
+        
+    return false;
+}
+
+JSValueRef JSObjectGetPrivateProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName)
+{
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+    JSObject* jsObject = toJS(object);
+    JSValue result;
+    Identifier name(propertyName->identifier(&exec->vm()));
+
+    // Get wrapped object if proxied
+    if (jsObject->inherits(JSProxy::info()))
+        jsObject = jsCast<JSProxy*>(jsObject)->target();
+
+    if (jsObject->inherits(JSCallbackObject<JSGlobalObject>::info()))
+        result = jsCast<JSCallbackObject<JSGlobalObject>*>(jsObject)->getPrivateProperty(name);
+    else if (jsObject->inherits(JSCallbackObject<JSDestructibleObject>::info()))
+        result = jsCast<JSCallbackObject<JSDestructibleObject>*>(jsObject)->getPrivateProperty(name);
+#if JSC_OBJC_API_ENABLED
+    else if (jsObject->inherits(JSCallbackObject<JSAPIWrapperObject>::info()))
+        result = jsCast<JSCallbackObject<JSAPIWrapperObject>*>(jsObject)->getPrivateProperty(name);
+#endif
+    return toRef(exec, result);
+}
+
+bool JSObjectSetPrivateProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef value)
+{
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+    JSObject* jsObject = toJS(object);
+    JSValue jsValue = value ? toJS(exec, value) : JSValue();
+    Identifier name(propertyName->identifier(&exec->vm()));
+
+    // Get wrapped object if proxied
+    if (jsObject->inherits(JSProxy::info()))
+        jsObject = jsCast<JSProxy*>(jsObject)->target();
+
+    if (jsObject->inherits(JSCallbackObject<JSGlobalObject>::info())) {
+        jsCast<JSCallbackObject<JSGlobalObject>*>(jsObject)->setPrivateProperty(exec->vm(), name, jsValue);
+        return true;
+    }
+    if (jsObject->inherits(JSCallbackObject<JSDestructibleObject>::info())) {
+        jsCast<JSCallbackObject<JSDestructibleObject>*>(jsObject)->setPrivateProperty(exec->vm(), name, jsValue);
+        return true;
+    }
+#if JSC_OBJC_API_ENABLED
+    if (jsObject->inherits(JSCallbackObject<JSAPIWrapperObject>::info())) {
+        jsCast<JSCallbackObject<JSAPIWrapperObject>*>(jsObject)->setPrivateProperty(exec->vm(), name, jsValue);
+        return true;
+    }
+#endif
+    return false;
+}
+
+bool JSObjectDeletePrivateProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName)
+{
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+    JSObject* jsObject = toJS(object);
+    Identifier name(propertyName->identifier(&exec->vm()));
+
+    // Get wrapped object if proxied
+    if (jsObject->inherits(JSProxy::info()))
+        jsObject = jsCast<JSProxy*>(jsObject)->target();
+
+    if (jsObject->inherits(JSCallbackObject<JSGlobalObject>::info())) {
+        jsCast<JSCallbackObject<JSGlobalObject>*>(jsObject)->deletePrivateProperty(name);
+        return true;
+    }
+    if (jsObject->inherits(JSCallbackObject<JSDestructibleObject>::info())) {
+        jsCast<JSCallbackObject<JSDestructibleObject>*>(jsObject)->deletePrivateProperty(name);
+        return true;
+    }
+#if JSC_OBJC_API_ENABLED
+    if (jsObject->inherits(JSCallbackObject<JSAPIWrapperObject>::info())) {
+        jsCast<JSCallbackObject<JSAPIWrapperObject>*>(jsObject)->deletePrivateProperty(name);
+        return true;
+    }
+#endif
+    return false;
+}
+
+bool JSObjectIsFunction(JSContextRef ctx, JSObjectRef object)
+{
+    if (!object)
+        return false;
+    JSLockHolder locker(toJS(ctx));
+    CallData callData;
+    JSCell* cell = toJS(object);
+    return cell->methodTable()->getCallData(cell, callData) != CallTypeNone;
+}
+
+JSValueRef JSObjectCallAsFunction(JSContextRef ctx, JSObjectRef object, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
+{
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    if (!object)
+        return 0;
+
+    JSObject* jsObject = toJS(object);
+    JSObject* jsThisObject = toJS(thisObject);
+
+    if (!jsThisObject)
+        jsThisObject = exec->globalThisValue();
+
+    MarkedArgumentBuffer argList;
+    for (size_t i = 0; i < argumentCount; i++)
+        argList.append(toJS(exec, arguments[i]));
+
+    CallData callData;
+    CallType callType = jsObject->methodTable()->getCallData(jsObject, callData);
+    if (callType == CallTypeNone)
+        return 0;
+
+    JSValueRef result = toRef(exec, call(exec, jsObject, callType, callData, jsThisObject, argList));
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+    return result;
+}
+
+bool JSObjectIsConstructor(JSContextRef, JSObjectRef object)
+{
+    if (!object)
+        return false;
+    JSObject* jsObject = toJS(object);
+    ConstructData constructData;
+    return jsObject->methodTable()->getConstructData(jsObject, constructData) != ConstructTypeNone;
+}
+
+JSObjectRef JSObjectCallAsConstructor(JSContextRef ctx, JSObjectRef object, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
+{
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    if (!object)
+        return 0;
+
+    JSObject* jsObject = toJS(object);
+
+    ConstructData constructData;
+    ConstructType constructType = jsObject->methodTable()->getConstructData(jsObject, constructData);
+    if (constructType == ConstructTypeNone)
+        return 0;
+
+    MarkedArgumentBuffer argList;
+    for (size_t i = 0; i < argumentCount; i++)
+        argList.append(toJS(exec, arguments[i]));
+    JSObjectRef result = toRef(construct(exec, jsObject, constructType, constructData, argList));
+    if (handleExceptionIfNeeded(exec, exception) == ExceptionStatus::DidThrow)
+        result = 0;
+    return result;
+}
+
+struct OpaqueJSPropertyNameArray {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    OpaqueJSPropertyNameArray(VM* vm)
+        : refCount(0)
+        , vm(vm)
+    {
+    }
+    
+    unsigned refCount;
+    VM* vm;
+    Vector<JSRetainPtr<JSStringRef>> array;
+};
+
+JSPropertyNameArrayRef JSObjectCopyPropertyNames(JSContextRef ctx, JSObjectRef object)
+{
+    if (!ctx) {
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+    ExecState* exec = toJS(ctx);
+    JSLockHolder locker(exec);
+
+    VM* vm = &exec->vm();
+
+    JSObject* jsObject = toJS(object);
+    JSPropertyNameArrayRef propertyNames = new OpaqueJSPropertyNameArray(vm);
+    PropertyNameArray array(vm, PropertyNameMode::Strings);
+    jsObject->methodTable()->getPropertyNames(jsObject, exec, array, EnumerationMode());
+
+    size_t size = array.size();
+    propertyNames->array.reserveInitialCapacity(size);
+    for (size_t i = 0; i < size; ++i)
+        propertyNames->array.uncheckedAppend(JSRetainPtr<JSStringRef>(Adopt, OpaqueJSString::create(array[i].string()).leakRef()));
+    
+    return JSPropertyNameArrayRetain(propertyNames);
+}
+
+JSPropertyNameArrayRef JSPropertyNameArrayRetain(JSPropertyNameArrayRef array)
+{
+    ++array->refCount;
+    return array;
+}
+
+void JSPropertyNameArrayRelease(JSPropertyNameArrayRef array)
+{
+    if (--array->refCount == 0) {
+        JSLockHolder locker(array->vm);
+        delete array;
+    }
+}
+
+size_t JSPropertyNameArrayGetCount(JSPropertyNameArrayRef array)
+{
+    return array->array.size();
+}
+
+JSStringRef JSPropertyNameArrayGetNameAtIndex(JSPropertyNameArrayRef array, size_t index)
+{
+    return array->array[static_cast<unsigned>(index)].get();
+}
+
+void JSPropertyNameAccumulatorAddName(JSPropertyNameAccumulatorRef array, JSStringRef propertyName)
+{
+    PropertyNameArray* propertyNames = toJS(array);
+    JSLockHolder locker(propertyNames->vm());
+    propertyNames->add(propertyName->identifier(propertyNames->vm()));
+}