JavaScriptCore-576.tar.gz

[apple/javascriptcore.git] / API / JSCallbackObjectFunctions.h

diff --git a/API/JSCallbackObjectFunctions.h b/API/JSCallbackObjectFunctions.h
index 23f941da663ae0de557b726483298f7cf5ce764a..4b28a99285bdc2010e7d685569e9885cc403a1d2 100644 (file)
--- a/API/JSCallbackObjectFunctions.h
+++ b/API/JSCallbackObjectFunctions.h
@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 

+#include "APIShims.h"

 #include "APICast.h"
 #include "Error.h"
 #include "JSCallbackFunction.h"
 #include "APICast.h"
 #include "Error.h"
 #include "JSCallbackFunction.h"


@@ -40,14 +41,14 @@
 namespace JSC {
 
 template <class Base>
 namespace JSC {
 
 template <class Base>

-inline JSCallbackObject<Base>* JSCallbackObject<Base>::asCallbackObject(JSValuePtr value)
+inline JSCallbackObject<Base>* JSCallbackObject<Base>::asCallbackObject(JSValue value)

 {
     ASSERT(asObject(value)->inherits(&info));
     return static_cast<JSCallbackObject*>(asObject(value));
 }
 
 template <class Base>
 {
     ASSERT(asObject(value)->inherits(&info));
     return static_cast<JSCallbackObject*>(asObject(value));
 }
 
 template <class Base>

-JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, PassRefPtr<Structure> structure, JSClassRef jsClass, void* data)
+JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, void* data)

     : Base(structure)
     , m_callbackObjectData(new JSCallbackObjectData(data, jsClass))
 {
     : Base(structure)
     , m_callbackObjectData(new JSCallbackObjectData(data, jsClass))
 {


@@ -79,7 +80,7 @@ void JSCallbackObject<Base>::init(ExecState* exec)
     
     // initialize from base to derived
     for (int i = static_cast<int>(initRoutines.size()) - 1; i >= 0; i--) {
     
     // initialize from base to derived
     for (int i = static_cast<int>(initRoutines.size()) - 1; i >= 0; i--) {

-        JSLock::DropAllLocks dropAllLocks(exec);
+        APICallbackShim callbackShim(exec);

         JSObjectInitializeCallback initialize = initRoutines[i];
         initialize(toRef(exec), toRef(this));
     }
         JSObjectInitializeCallback initialize = initRoutines[i];
         initialize(toRef(exec), toRef(this));
     }


@@ -99,7 +100,7 @@ template <class Base>
 UString JSCallbackObject<Base>::className() const
 {
     UString thisClassName = classRef()->className();
 UString JSCallbackObject<Base>::className() const
 {
     UString thisClassName = classRef()->className();

-    if (!thisClassName.isNull())
+    if (!thisClassName.isEmpty())

         return thisClassName;
     
     return Base::className();
         return thisClassName;
     
     return Base::className();


@@ -117,7 +118,7 @@ bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifie
         if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());
         if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-            JSLock::DropAllLocks dropAllLocks(exec);
+            APICallbackShim callbackShim(exec);

             if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
                 slot.setCustom(this, callbackGetter);
                 return true;
             if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
                 slot.setCustom(this, callbackGetter);
                 return true;


@@ -125,9 +126,19 @@ bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifie
         } else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());
         } else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-            JSLock::DropAllLocks dropAllLocks(exec);
-            if (JSValueRef value = getProperty(ctx, thisRef, propertyNameRef.get(), toRef(exec->exceptionSlot()))) {
-                slot.setValue(toJS(value));
+            JSValueRef exception = 0;
+            JSValueRef value;
+            {
+                APICallbackShim callbackShim(exec);
+                value = getProperty(ctx, thisRef, propertyNameRef.get(), &exception);
+            }
+            if (exception) {
+                exec->setException(toJS(exec, exception));
+                slot.setValue(jsUndefined());
+                return true;
+            }
+            if (value) {
+                slot.setValue(toJS(exec, value));

                 return true;
             }
         }
                 return true;
             }
         }


@@ -157,19 +168,45 @@ bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, unsigned proper
 }
 
 template <class Base>
 }
 
 template <class Base>

-void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName, JSValuePtr value, PutPropertySlot& slot)
+bool JSCallbackObject<Base>::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
+{
+    PropertySlot slot;
+    if (getOwnPropertySlot(exec, propertyName, slot)) {
+        // Ideally we should return an access descriptor, but returning a value descriptor is better than nothing.
+        JSValue value = slot.getValue(exec, propertyName);
+        if (!exec->hadException())
+            descriptor.setValue(value);
+        // We don't know whether the property is configurable, but assume it is.
+        descriptor.setConfigurable(true);
+        // We don't know whether the property is enumerable (we could call getOwnPropertyNames() to find out), but assume it isn't.
+        descriptor.setEnumerable(false);
+        return true;
+    }
+
+    return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+}
+
+template <class Base>
+void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)

 {
     JSContextRef ctx = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     RefPtr<OpaqueJSString> propertyNameRef;
 {
     JSContextRef ctx = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     RefPtr<OpaqueJSString> propertyNameRef;

-    JSValueRef valueRef = toRef(value);
+    JSValueRef valueRef = toRef(exec, value);

     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-            JSLock::DropAllLocks dropAllLocks(exec);
-            if (setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, toRef(exec->exceptionSlot())))
+            JSValueRef exception = 0;
+            bool result;
+            {
+                APICallbackShim callbackShim(exec);
+                result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
+            }
+            if (exception)
+                exec->setException(toJS(exec, exception));
+            if (result || exception)

                 return;
         }
         
                 return;
         }
         


@@ -180,8 +217,15 @@ void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName
                 if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
                     if (!propertyNameRef)
                         propertyNameRef = OpaqueJSString::create(propertyName.ustring());
                 if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
                     if (!propertyNameRef)
                         propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-                    JSLock::DropAllLocks dropAllLocks(exec);
-                    if (setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, toRef(exec->exceptionSlot())))
+                    JSValueRef exception = 0;
+                    bool result;
+                    {
+                        APICallbackShim callbackShim(exec);
+                        result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
+                    }
+                    if (exception)
+                        exec->setException(toJS(exec, exception));
+                    if (result || exception)

                         return;
                 } else
                     throwError(exec, ReferenceError, "Attempt to set a property that is not settable.");
                         return;
                 } else
                     throwError(exec, ReferenceError, "Attempt to set a property that is not settable.");


@@ -212,8 +256,15 @@ bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& p
         if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());
         if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-            JSLock::DropAllLocks dropAllLocks(exec);
-            if (deleteProperty(ctx, thisRef, propertyNameRef.get(), toRef(exec->exceptionSlot())))
+            JSValueRef exception = 0;
+            bool result;
+            {
+                APICallbackShim callbackShim(exec);
+                result = deleteProperty(ctx, thisRef, propertyNameRef.get(), &exception);
+            }
+            if (exception)
+                exec->setException(toJS(exec, exception));
+            if (result || exception)

                 return true;
         }
         
                 return true;
         }
         


@@ -266,9 +317,16 @@ JSObject* JSCallbackObject<Base>::construct(ExecState* exec, JSObject* construct
             int argumentCount = static_cast<int>(args.size());
             Vector<JSValueRef, 16> arguments(argumentCount);
             for (int i = 0; i < argumentCount; i++)
             int argumentCount = static_cast<int>(args.size());
             Vector<JSValueRef, 16> arguments(argumentCount);
             for (int i = 0; i < argumentCount; i++)

-                arguments[i] = toRef(args.at(exec, i));
-            JSLock::DropAllLocks dropAllLocks(exec);
-            return toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), toRef(exec->exceptionSlot())));
+                arguments[i] = toRef(exec, args.at(i));
+            JSValueRef exception = 0;
+            JSObject* result;
+            {
+                APICallbackShim callbackShim(exec);
+                result = toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), &exception));
+            }
+            if (exception)
+                exec->setException(toJS(exec, exception));
+            return result;

         }
     }
     
         }
     }
     


@@ -277,15 +335,23 @@ JSObject* JSCallbackObject<Base>::construct(ExecState* exec, JSObject* construct
 }
 
 template <class Base>
 }
 
 template <class Base>

-bool JSCallbackObject<Base>::hasInstance(ExecState* exec, JSValuePtr value, JSValuePtr)
+bool JSCallbackObject<Base>::hasInstance(ExecState* exec, JSValue value, JSValue)

 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance) {
 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance) {

-            JSLock::DropAllLocks dropAllLocks(exec);
-            return hasInstance(execRef, thisRef, toRef(value), toRef(exec->exceptionSlot()));
+            JSValueRef valueRef = toRef(exec, value);
+            JSValueRef exception = 0;
+            bool result;
+            {
+                APICallbackShim callbackShim(exec);
+                result = hasInstance(execRef, thisRef, valueRef, &exception);
+            }
+            if (exception)
+                exec->setException(toJS(exec, exception));
+            return result;

         }
     }
     return false;
         }
     }
     return false;


@@ -304,7 +370,7 @@ CallType JSCallbackObject<Base>::getCallData(CallData& callData)
 }
 
 template <class Base>
 }
 
 template <class Base>

-JSValuePtr JSCallbackObject<Base>::call(ExecState* exec, JSObject* functionObject, JSValuePtr thisValue, const ArgList& args)
+JSValue JSCallbackObject<Base>::call(ExecState* exec, JSObject* functionObject, JSValue thisValue, const ArgList& args)

 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef functionRef = toRef(functionObject);
 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef functionRef = toRef(functionObject);


@@ -315,25 +381,32 @@ JSValuePtr JSCallbackObject<Base>::call(ExecState* exec, JSObject* functionObjec
             int argumentCount = static_cast<int>(args.size());
             Vector<JSValueRef, 16> arguments(argumentCount);
             for (int i = 0; i < argumentCount; i++)
             int argumentCount = static_cast<int>(args.size());
             Vector<JSValueRef, 16> arguments(argumentCount);
             for (int i = 0; i < argumentCount; i++)

-                arguments[i] = toRef(args.at(exec, i));
-            JSLock::DropAllLocks dropAllLocks(exec);
-            return toJS(callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), toRef(exec->exceptionSlot())));
+                arguments[i] = toRef(exec, args.at(i));
+            JSValueRef exception = 0;
+            JSValue result;
+            {
+                APICallbackShim callbackShim(exec);
+                result = toJS(exec, callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception));
+            }
+            if (exception)
+                exec->setException(toJS(exec, exception));
+            return result;

         }
     }
     
     ASSERT_NOT_REACHED(); // getCallData should prevent us from reaching here
         }
     }
     
     ASSERT_NOT_REACHED(); // getCallData should prevent us from reaching here

-    return noValue();
+    return JSValue();

 }
 
 template <class Base>
 }
 
 template <class Base>

-void JSCallbackObject<Base>::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
+void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)

 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {
 {
     JSContextRef execRef = toRef(exec);
     JSObjectRef thisRef = toRef(this);
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
         if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {

-            JSLock::DropAllLocks dropAllLocks(exec);
+            APICallbackShim callbackShim(exec);

             getPropertyNames(execRef, thisRef, toRef(&propertyNames));
         }
         
             getPropertyNames(execRef, thisRef, toRef(&propertyNames));
         }
         


@@ -343,7 +416,7 @@ void JSCallbackObject<Base>::getPropertyNames(ExecState* exec, PropertyNameArray
             for (iterator it = staticValues->begin(); it != end; ++it) {
                 UString::Rep* name = it->first.get();
                 StaticValueEntry* entry = it->second;
             for (iterator it = staticValues->begin(); it != end; ++it) {
                 UString::Rep* name = it->first.get();
                 StaticValueEntry* entry = it->second;

-                if (entry->getProperty && !(entry->attributes & kJSPropertyAttributeDontEnum))
+                if (entry->getProperty && (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties)))

                     propertyNames.add(Identifier(exec, name));
             }
         }
                     propertyNames.add(Identifier(exec, name));
             }
         }


@@ -354,13 +427,13 @@ void JSCallbackObject<Base>::getPropertyNames(ExecState* exec, PropertyNameArray
             for (iterator it = staticFunctions->begin(); it != end; ++it) {
                 UString::Rep* name = it->first.get();
                 StaticFunctionEntry* entry = it->second;
             for (iterator it = staticFunctions->begin(); it != end; ++it) {
                 UString::Rep* name = it->first.get();
                 StaticFunctionEntry* entry = it->second;

-                if (!(entry->attributes & kJSPropertyAttributeDontEnum))
+                if (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties))

                     propertyNames.add(Identifier(exec, name));
             }
         }
     }
     
                     propertyNames.add(Identifier(exec, name));
             }
         }
     }
     

-    Base::getPropertyNames(exec, propertyNames);
+    Base::getOwnPropertyNames(exec, propertyNames, mode);

 }
 
 template <class Base>
 }
 
 template <class Base>


@@ -376,11 +449,20 @@ double JSCallbackObject<Base>::toNumber(ExecState* exec) const
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
         if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
         if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {

-            JSLock::DropAllLocks dropAllLocks(exec);
-            if (JSValueRef value = convertToType(ctx, thisRef, kJSTypeNumber, toRef(exec->exceptionSlot()))) {
-                double dValue;
-                return toJS(value).getNumber(dValue) ? dValue : NaN;
+            JSValueRef exception = 0;
+            JSValueRef value;
+            {
+                APICallbackShim callbackShim(exec);
+                value = convertToType(ctx, thisRef, kJSTypeNumber, &exception);

             }
             }

+            if (exception) {
+                exec->setException(toJS(exec, exception));
+                return 0;
+            }
+
+            double dValue;
+            if (value)
+                return toJS(exec, value).getNumber(dValue) ? dValue : NaN;

         }
             
     return Base::toNumber(exec);
         }
             
     return Base::toNumber(exec);


@@ -394,13 +476,18 @@ UString JSCallbackObject<Base>::toString(ExecState* exec) const
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
         if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
     
     for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
         if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {

+            JSValueRef exception = 0;

             JSValueRef value;
             {
             JSValueRef value;
             {

-                JSLock::DropAllLocks dropAllLocks(exec);
-                value = convertToType(ctx, thisRef, kJSTypeString, toRef(exec->exceptionSlot()));
+                APICallbackShim callbackShim(exec);
+                value = convertToType(ctx, thisRef, kJSTypeString, &exception);
+            }
+            if (exception) {
+                exec->setException(toJS(exec, exception));
+                return "";

             }
             if (value)
             }
             if (value)

-                return toJS(value).getString();
+                return toJS(exec, value).getString(exec);

         }
             
     return Base::toString(exec);
         }
             
     return Base::toString(exec);


@@ -429,7 +516,7 @@ bool JSCallbackObject<Base>::inherits(JSClassRef c) const
 }
 
 template <class Base>
 }
 
 template <class Base>

-JSValuePtr JSCallbackObject<Base>::staticValueGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
+JSValue JSCallbackObject<Base>::staticValueGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)

 {
     JSCallbackObject* thisObj = asCallbackObject(slot.slotBase());
     
 {
     JSCallbackObject* thisObj = asCallbackObject(slot.slotBase());
     


@@ -442,16 +529,25 @@ JSValuePtr JSCallbackObject<Base>::staticValueGetter(ExecState* exec, const Iden
                 if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
                     if (!propertyNameRef)
                         propertyNameRef = OpaqueJSString::create(propertyName.ustring());
                 if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
                     if (!propertyNameRef)
                         propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-                    JSLock::DropAllLocks dropAllLocks(exec);
-                    if (JSValueRef value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), toRef(exec->exceptionSlot())))
-                        return toJS(value);
+                    JSValueRef exception = 0;
+                    JSValueRef value;
+                    {
+                        APICallbackShim callbackShim(exec);
+                        value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
+                    }
+                    if (exception) {
+                        exec->setException(toJS(exec, exception));
+                        return jsUndefined();
+                    }
+                    if (value)
+                        return toJS(exec, value);

                 }
                 }

-                    
+

     return throwError(exec, ReferenceError, "Static value property defined with NULL getProperty callback.");
 }
 
 template <class Base>
     return throwError(exec, ReferenceError, "Static value property defined with NULL getProperty callback.");
 }
 
 template <class Base>

-JSValuePtr JSCallbackObject<Base>::staticFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
+JSValue JSCallbackObject<Base>::staticFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)

 {
     JSCallbackObject* thisObj = asCallbackObject(slot.slotBase());
     
 {
     JSCallbackObject* thisObj = asCallbackObject(slot.slotBase());
     


@@ -476,7 +572,7 @@ JSValuePtr JSCallbackObject<Base>::staticFunctionGetter(ExecState* exec, const I
 }
 
 template <class Base>
 }
 
 template <class Base>

-JSValuePtr JSCallbackObject<Base>::callbackGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
+JSValue JSCallbackObject<Base>::callbackGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)

 {
     JSCallbackObject* thisObj = asCallbackObject(slot.slotBase());
     
 {
     JSCallbackObject* thisObj = asCallbackObject(slot.slotBase());
     


@@ -487,9 +583,18 @@ JSValuePtr JSCallbackObject<Base>::callbackGetter(ExecState* exec, const Identif
         if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());
         if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
             if (!propertyNameRef)
                 propertyNameRef = OpaqueJSString::create(propertyName.ustring());

-            JSLock::DropAllLocks dropAllLocks(exec);
-            if (JSValueRef value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), toRef(exec->exceptionSlot())))
-                return toJS(value);
+            JSValueRef exception = 0;
+            JSValueRef value;
+            {
+                APICallbackShim callbackShim(exec);
+                value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
+            }
+            if (exception) {
+                exec->setException(toJS(exec, exception));
+                return jsUndefined();
+            }
+            if (value)
+                return toJS(exec, value);

         }
             
     return throwError(exec, ReferenceError, "hasProperty callback returned true for a property that doesn't exist.");
         }
             
     return throwError(exec, ReferenceError, "hasProperty callback returned true for a property that doesn't exist.");