Heap profiler: consider Function instances separately, similar to Arrays and Objects.

src/heap-profiler.cc

 // Copyright 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 49 matching lines @@
   }
   static void InsertIntoTree(JSObjectsClusterTree* tree,
                              const JSObjectsCluster& cluster, int size);
 };
 
 
 JSObjectsCluster Clusterizer::Clusterize(HeapObject* obj, bool fine_grain) {
   if (obj->IsJSObject()) {
     JSObject* js_obj = JSObject::cast(obj);
     String* constructor = JSObject::cast(js_obj)->constructor_name();
-    // Differentiate Object and Array instances.
+    // Differentiate Array, Function, and Object instances.
     if (fine_grain && (constructor == Heap::Object_symbol() ||
-                       constructor == Heap::Array_symbol())) {
+                       constructor == Heap::Array_symbol() ||
+                       constructor == Heap::function_class_symbol())) {
       return JSObjectsCluster(constructor, obj);
     } else {
       return JSObjectsCluster(constructor);
     }
   } else if (obj->IsString()) {
     return JSObjectsCluster(Heap::String_symbol());
   }
   return JSObjectsCluster();
 }
 
@@ skipping 455 matching lines @@
   js_retainer_profile.PrintStats();
 
   LOG(HeapSampleEndEvent("Heap", "allocated"));
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 } }  // namespace v8::internal