the IsPromise function should not execute js

src/bootstrapper.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 1536 matching lines @@
   INSTALL_NATIVE(JSFunction, "ToInteger", to_integer_fun);
   INSTALL_NATIVE(JSFunction, "ToUint32", to_uint32_fun);
   INSTALL_NATIVE(JSFunction, "ToInt32", to_int32_fun);
   INSTALL_NATIVE(JSFunction, "ToLength", to_length_fun);
 
   INSTALL_NATIVE(JSFunction, "GlobalEval", global_eval_fun);
   INSTALL_NATIVE(JSFunction, "GetStackTraceLine", get_stack_trace_line_fun);
   INSTALL_NATIVE(JSFunction, "ToCompletePropertyDescriptor",
                  to_complete_property_descriptor);
 
-  INSTALL_NATIVE(JSFunction, "IsPromise", is_promise);
+  INSTALL_NATIVE(Symbol, "promiseStatus", promise_status);
   INSTALL_NATIVE(JSFunction, "PromiseCreate", promise_create);
   INSTALL_NATIVE(JSFunction, "PromiseResolve", promise_resolve);
   INSTALL_NATIVE(JSFunction, "PromiseReject", promise_reject);
   INSTALL_NATIVE(JSFunction, "PromiseChain", promise_chain);
   INSTALL_NATIVE(JSFunction, "PromiseCatch", promise_catch);
   INSTALL_NATIVE(JSFunction, "PromiseThen", promise_then);
 
   INSTALL_NATIVE(JSFunction, "NotifyChange", observers_notify_change);
   INSTALL_NATIVE(JSFunction, "EnqueueSpliceRecord", observers_enqueue_splice);
   INSTALL_NATIVE(JSFunction, "BeginPerformSplice",
@@ skipping 1356 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal