js accessor creation on Template

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 1926 matching lines @@
     MaybeObject* maybe_new_map = old_map->Copy();
     if (!maybe_new_map->To(&new_map)) return maybe_new_map;
 
     new_map->set_is_access_check_needed(true);
     object->set_map(new_map);
   }
   return isolate->heap()->undefined_value();
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_DefineJsAccessor) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, array_object, 1);
+  CONVERT_SMI_ARG_CHECKED(offset, 2);
+  // Order of array contents is determined in Template::SetAccessor.
+  NeanderArray array(array_object);
+  Handle<String> name(String::cast(array.get(offset++)), isolate);
+  Handle<Object> getter(array.get(offset++), isolate);
+  Handle<Object> setter(array.get(offset++), isolate);
+  v8::AccessControl access_control =
+      static_cast<v8::AccessControl>(Smi::cast(array.get(offset++))->value());
+  PropertyAttributes attributes =
+      static_cast<PropertyAttributes>(Smi::cast(array.get(offset++))->value());
+  // Transform getter into something DefineAccessor can handle.
+  if (getter->IsUndefined()) {
+    getter = isolate->factory()->null_value();
+  } else {
+    Handle<FunctionTemplateInfo> info =
+        Handle<FunctionTemplateInfo>::cast(getter);
+    getter = Utils::OpenHandle(*Utils::ToLocal(info)->GetFunction());
+  }
+  // Transform getter into something DefineAccessor can handle.
+  if (setter->IsUndefined()) {
+    setter = isolate->factory()->null_value();
+  } else {
+    Handle<FunctionTemplateInfo> info =
+        Handle<FunctionTemplateInfo>::cast(setter);
+    setter = Utils::OpenHandle(*Utils::ToLocal(info)->GetFunction());
+  }
+  JSObject::DefineAccessor(
+      object, name, getter, setter, attributes, access_control);
+  return isolate->heap()->undefined_value();
+}
+
+
 static Failure* ThrowRedeclarationError(Isolate* isolate,
                                         const char* type,
                                         Handle<String> name) {
   HandleScope scope(isolate);
   Handle<Object> type_handle =
       isolate->factory()->NewStringFromAscii(CStrVector(type));
   Handle<Object> args[2] = { type_handle, name };
   Handle<Object> error =
       isolate->factory()->NewTypeError("redeclaration", HandleVector(args, 2));
   return isolate->Throw(*error);
@@ skipping 12534 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