Use JSFunction::IsBuiltin() for checking if a function is a builtin one

src/execution.cc

 // Copyright 2006-2008 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 574 matching lines @@
   // Just continue if breaks are disabled.
   if (Debug::disable_break()) {
     return Heap::undefined_value();
   }
 
   {
     JavaScriptFrameIterator it;
     ASSERT(!it.done());
     Object* fun = it.frame()->function();
     if (fun && fun->IsJSFunction()) {
+      // Don't stop in builtin functions.
+      if (JSFunction::cast(fun)->IsBuiltin()) {
+        return Heap::undefined_value();
+      }
       GlobalObject* global = JSFunction::cast(fun)->context()->global();
-      // Don't stop in builtin functions.
-      if (global == Top::context()->builtins()) {
-       return Heap::undefined_value();
-      }
       // Don't stop in debugger functions.
       if (Debug::IsDebugGlobal(global)) {
-       return Heap::undefined_value();
+        return Heap::undefined_value();
       }
     }
   }
 
   // Collect the break state before clearing the flags.
   bool debug_command_only =
       StackGuard::IsDebugCommand() && !StackGuard::IsDebugBreak();
 
   // Clear the debug request flags.
   StackGuard::Continue(DEBUGBREAK);
@@ skipping 45 matching lines @@
   // All allocation spaces other than NEW_SPACE have the same effect.
   Heap::CollectAllGarbage();
   return v8::Undefined();
 }
 
 
 static GCExtension kGCExtension;
 v8::DeclareExtension kGCExtensionDeclaration(&kGCExtension);
 
 } }  // namespace v8::internal