| Index: src/isolate.cc
|
| diff --git a/src/isolate.cc b/src/isolate.cc
|
| index a3456c4600212a99cd1ec0eb3b9320f3e303b2ae..d5cda54a1859fac6cccb6b7e8bad31c340fb03d5 100644
|
| --- a/src/isolate.cc
|
| +++ b/src/isolate.cc
|
| @@ -1348,14 +1348,21 @@
|
| }
|
|
|
|
|
| -// Use stack_trace_symbol as proxy for [[ErrorData]].
|
| -bool Isolate::IsErrorObject(Handle<Object> object) {
|
| - Handle<Name> symbol = factory()->stack_trace_symbol();
|
| - if (!object->IsJSObject()) return false;
|
| - Maybe<bool> has_stack_trace =
|
| - JSReceiver::HasOwnProperty(Handle<JSReceiver>::cast(object), symbol);
|
| - DCHECK(!has_stack_trace.IsNothing());
|
| - return has_stack_trace.FromJust();
|
| +// Traverse prototype chain to find out whether the object is derived from
|
| +// the Error object.
|
| +bool Isolate::IsErrorObject(Handle<Object> obj) {
|
| + if (!obj->IsJSObject()) return false;
|
| + Handle<Object> error_constructor = error_function();
|
| + DisallowHeapAllocation no_gc;
|
| + for (PrototypeIterator iter(this, *obj, PrototypeIterator::START_AT_RECEIVER);
|
| + !iter.IsAtEnd(); iter.Advance()) {
|
| + if (iter.GetCurrent()->IsJSProxy()) return false;
|
| + if (iter.GetCurrent<JSObject>()->map()->GetConstructor() ==
|
| + *error_constructor) {
|
| + return true;
|
| + }
|
| + }
|
| + return false;
|
| }
|
|
|
|
|
|
|