ES6: Add Object.getOwnPropertySymbols

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 5725 matching lines @@
          JSObject::cast(proto)->map()->is_hidden_prototype()) {
     count++;
     proto = JSObject::cast(proto)->GetPrototype();
   }
   return count;
 }
 
 
 // Return the names of the local named properties.
 // args[0]: object
+// args[1]: int
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetLocalPropertyNames) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
   if (!args[0]->IsJSObject()) {
     return isolate->heap()->undefined_value();
   }
   CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
-  CONVERT_BOOLEAN_ARG_CHECKED(include_symbols, 1);
-  PropertyAttributes filter = include_symbols ? NONE : SYMBOLIC;
+  CONVERT_SMI_ARG_CHECKED(filter_value, 1);
+  ASSERT(filter_value >= NONE && filter_value < ABSENT);
+  PropertyAttributes filter = static_cast<PropertyAttributes>(filter_value);
 
   // Skip the global proxy as it has no properties and always delegates to the
   // real global object.
   if (obj->IsJSGlobalProxy()) {
     // Only collect names if access is permitted.
     if (obj->IsAccessCheckNeeded() &&
         !isolate->MayNamedAccess(*obj,
                                  isolate->heap()->undefined_value(),
                                  v8::ACCESS_KEYS)) {
       isolate->ReportFailedAccessCheck(*obj, v8::ACCESS_KEYS);
@@ skipping 9128 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal