Debugger: ensure that functions with debug info have code with break slots.

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 5547 matching lines @@
   // We reenable optimization whenever the number of tries is a large
   // enough power of 2.
   if (tries >= 16 && (((tries - 1) & tries) == 0)) {
     set_optimization_disabled(false);
     set_opt_count(0);
     set_deopt_count(0);
   }
 }
 
 
+bool SharedFunctionInfo::IsSubjectToDebugging() {
+  Object* script_obj = script();
+  if (script_obj->IsUndefined()) return false;
+  Script* script = Script::cast(script_obj);
+  Script::Type type = static_cast<Script::Type>(script->type()->value());
+  return type == Script::TYPE_NORMAL;
+}
+
+
 bool JSFunction::IsBuiltin() {
   return context()->global_object()->IsJSBuiltinsObject();
 }
 
 
-bool JSFunction::IsFromNativeScript() {
-  Object* script = shared()->script();
-  bool native = script->IsScript() &&
-                Script::cast(script)->type()->value() == Script::TYPE_NATIVE;
-  DCHECK(!IsBuiltin() || native);  // All builtins are also native.
-  return native;
+bool JSFunction::IsSubjectToDebugging() {
+  return shared()->IsSubjectToDebugging();
 }
 
 
-bool JSFunction::IsFromExtensionScript() {
-  Object* script = shared()->script();
-  return script->IsScript() &&
-         Script::cast(script)->type()->value() == Script::TYPE_EXTENSION;
-}
-
-
-bool JSFunction::IsSubjectToDebugging() {
-  return !IsFromNativeScript() && !IsFromExtensionScript();
-}
-
-
 bool JSFunction::NeedsArgumentsAdaption() {
   return shared()->internal_formal_parameter_count() !=
          SharedFunctionInfo::kDontAdaptArgumentsSentinel;
 }
 
 
 bool JSFunction::IsOptimized() {
   return code()->kind() == Code::OPTIMIZED_FUNCTION;
 }
 
@@ skipping 1692 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_