Always check that a Name is a String before converting it.

third_party/WebKit/Source/bindings/templates/interface.cpp

 {% extends 'interface_base.cpp' %}
 
 
 {##############################################################################}
 {% block indexed_property_getter %}
 {% if indexed_property_getter and not indexed_property_getter.is_custom %}
 {% set getter = indexed_property_getter %}
 static void indexedPropertyGetter(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     {{cpp_class}}* impl = {{v8_class}}::toImpl(info.Holder());
@@ skipping 149 matching lines @@
 {% endif %}
 {% endblock %}
 
 
 {##############################################################################}
 {% block named_property_getter %}
 {% if named_property_getter and not named_property_getter.is_custom %}
 {% set getter = named_property_getter %}
 static void namedPropertyGetter(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
+    if (!name->IsString())
+        return;
     auto nameString = name.As<v8::String>();
     {{cpp_class}}* impl = {{v8_class}}::toImpl(info.Holder());
     AtomicString propertyName = toCoreAtomicString(nameString);
     {% if getter.is_raises_exception %}
     v8::String::Utf8Value namedProperty(nameString);
     ExceptionState exceptionState(ExceptionState::GetterContext, *namedProperty, "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {% if getter.is_call_with_script_state %}
     ScriptState* scriptState = ScriptState::current(info.GetIsolate());
     {% endif %}
@@ skipping 33 matching lines @@
 {% endblock %}
 
 
 {##############################################################################}
 {% block named_property_setter %}
 {% from 'utilities.cpp' import v8_value_to_local_cpp_value %}
 {% if named_property_setter and not named_property_setter.is_custom %}
 {% set setter = named_property_setter %}
 static void namedPropertySetter(v8::Local<v8::Name> name, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
+    if (!name->IsString())
+        return;
     auto nameString = name.As<v8::String>();
     {% if setter.has_exception_state %}
     v8::String::Utf8Value namedProperty(nameString);
     ExceptionState exceptionState(ExceptionState::SetterContext, *namedProperty, "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {{cpp_class}}* impl = {{v8_class}}::toImpl(info.Holder());
     {# v8_value_to_local_cpp_value('DOMString', 'nameString', 'propertyName') #}
     V8StringResource<> propertyName(nameString);
     if (!propertyName.prepare())
         return;
@@ skipping 51 matching lines @@
 
 {##############################################################################}
 {% block named_property_query %}
 {% if named_property_getter and named_property_getter.is_enumerable and
       not named_property_getter.is_custom_property_query %}
 {% set getter = named_property_getter %}
 {# If there is an enumerator, there MUST be a query method to properly
    communicate property attributes. #}
 static void namedPropertyQuery(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Integer>& info)
 {
+    if (!name->IsString())
+        return;
     {{cpp_class}}* impl = {{v8_class}}::toImpl(info.Holder());
     AtomicString propertyName = toCoreAtomicString(name.As<v8::String>());
     v8::String::Utf8Value namedProperty(name);
     ExceptionState exceptionState(ExceptionState::GetterContext, *namedProperty, "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% set getter_arguments = ['propertyName', 'exceptionState'] %}
     {% if getter.is_call_with_script_state %}
     ScriptState* scriptState = ScriptState::current(info.GetIsolate());
     {% set getter_arguments = ['scriptState'] + getter_arguments %}
     {% endif %}
     bool result = impl->namedPropertyQuery({{getter_arguments | join(', ')}});
@@ skipping 24 matching lines @@
 {% endif %}
 {% endblock %}
 
 
 {##############################################################################}
 {% block named_property_deleter %}
 {% if named_property_deleter and not named_property_deleter.is_custom %}
 {% set deleter = named_property_deleter %}
 static void namedPropertyDeleter(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Boolean>& info)
 {
+    if (!name->IsString())
+        return;
     {{cpp_class}}* impl = {{v8_class}}::toImpl(info.Holder());
     AtomicString propertyName = toCoreAtomicString(name.As<v8::String>());
     {% if deleter.is_raises_exception %}
     v8::String::Utf8Value namedProperty(name);
     ExceptionState exceptionState(ExceptionState::DeletionContext, *namedProperty, "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {% if deleter.is_call_with_script_state %}
     ScriptState* scriptState = ScriptState::current(info.GetIsolate());
     {% endif %}
     {% set deleter_name = deleter.name or 'anonymousNamedDeleter' %}
@@ skipping 73 matching lines @@
 
 {% endif %}
 {% endblock %}
 
 
 {##############################################################################}
 {% block origin_safe_method_setter %}
 {% if has_origin_safe_method_setter %}
 static void {{cpp_class}}OriginSafeMethodSetter(v8::Local<v8::Name> name, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
+    if (!name->IsString())
+        return;
     v8::Local<v8::Object> holder = {{v8_class}}::findInstanceInPrototypeChain(info.This(), info.GetIsolate());
     if (holder.IsEmpty())
         return;
     {{cpp_class}}* impl = {{v8_class}}::toImpl(holder);
     v8::String::Utf8Value attributeName(name);
     ExceptionState exceptionState(ExceptionState::SetterContext, *attributeName, "{{interface_name}}", info.Holder(), info.GetIsolate());
     if (!BindingSecurity::shouldAllowAccessTo(info.GetIsolate(), callingDOMWindow(info.GetIsolate()), impl, exceptionState)) {
         exceptionState.throwIfNeeded();
         return;
     }
@@ skipping 486 matching lines @@
 
 {% for method in methods if method.overloads and method.overloads.has_partial_overloads %}
 void {{v8_class}}::register{{method.name | blink_capitalize}}MethodForPartialInterface(void (*method)(const v8::FunctionCallbackInfo<v8::Value>&))
 {
     {{cpp_class}}V8Internal::{{method.name}}MethodForPartialInterface = method;
 }
 
 {% endfor %}
 {% endif %}
 {% endblock %}