Heap profiler: account primitive string objects as being constructed using 'String'.

src/objects.cc

 // Copyright 2006-2009 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 1168 matching lines @@
   // buffer that is plenty big enough for any floating point number, then
   // print that using vsnprintf (which may truncate but never allocate if
   // there is no more space in the buffer).
   EmbeddedVector<char, 100> buffer;
   OS::SNPrintF(buffer, "%.16g", Number());
   accumulator->Add("%s", buffer.start());
 }
 
 
 String* JSObject::class_name() {
-  if (IsJSFunction()) return Heap::function_class_symbol();
+  if (IsJSFunction()) {
+    return Heap::function_class_symbol();
+  }
   if (map()->constructor()->IsJSFunction()) {
     JSFunction* constructor = JSFunction::cast(map()->constructor());
     return String::cast(constructor->shared()->instance_class_name());
   }
   // If the constructor is not present, return "Object".
   return Heap::Object_symbol();
 }
 
 
+String* JSObject::constructor_name() {
+  if (IsJSFunction()) {
+    return Heap::function_class_symbol();
+  }
+  if (map()->constructor()->IsJSFunction()) {
+    JSFunction* constructor = JSFunction::cast(map()->constructor());
+    String* name = String::cast(constructor->shared()->name());
+    return name->length() > 0 ? name : constructor->shared()->inferred_name();
+  }
+  // If the constructor is not present, return "Object".
+  return Heap::Object_symbol();
+}
+
+
 void JSObject::JSObjectIterateBody(int object_size, ObjectVisitor* v) {
   // Iterate over all fields in the body. Assumes all are Object*.
   IteratePointers(v, kPropertiesOffset, object_size);
 }
 
 
 Object* JSObject::AddFastPropertyUsingMap(Map* new_map,
                                           String* name,
                                           Object* value) {
   int index = new_map->PropertyIndexFor(name);
@@ skipping 6790 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 
 } }  // namespace v8::internal