diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 67bc62e..58092a4 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -95,6 +95,7 @@
       os << "filler";
       break;
     case JS_OBJECT_TYPE:  // fall through
+    case JS_SPECIAL_API_OBJECT_TYPE:
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
     case JS_ARRAY_TYPE:
     case JS_GENERATOR_OBJECT_TYPE:
@@ -395,10 +396,16 @@
   obj->PrintHeader(os, id);
   // Don't call GetElementsKind, its validation code can cause the printer to
   // fail when debugging.
-  PrototypeIterator iter(obj->GetIsolate(), obj);
   os << "\n - map = " << reinterpret_cast<void*>(obj->map()) << " ["
-     << ElementsKindToString(obj->map()->elements_kind())
-     << "]\n - prototype = " << reinterpret_cast<void*>(iter.GetCurrent());
+     << ElementsKindToString(obj->map()->elements_kind());
+  if (obj->elements()->map() == obj->GetHeap()->fixed_cow_array_map()) {
+    os << " (COW)";
+  }
+  PrototypeIterator iter(obj->GetIsolate(), obj);
+  os << "]\n - prototype = " << reinterpret_cast<void*>(iter.GetCurrent());
+  if (obj->elements()->length() > 0) {
+    os << "\n - elements = " << Brief(obj->elements());
+  }
 }
 
 
@@ -454,6 +461,12 @@
   }
   os << "\n - elements kind: " << ElementsKindToString(elements_kind());
   os << "\n - unused property fields: " << unused_property_fields();
+  os << "\n - enum length: ";
+  if (EnumLength() == kInvalidEnumCacheSentinel) {
+    os << "invalid";
+  } else {
+    os << EnumLength();
+  }
   if (is_deprecated()) os << "\n - deprecated_map";
   if (is_stable()) os << "\n - stable_map";
   if (is_dictionary_map()) os << "\n - dictionary_map";
@@ -466,7 +479,6 @@
   if (is_access_check_needed()) os << "\n - access_check_needed";
   if (!is_extensible()) os << "\n - non-extensible";
   if (is_observed()) os << "\n - observed";
-  if (is_strong()) os << "\n - strong_map";
   if (is_prototype_map()) {
     os << "\n - prototype_map";
     os << "\n - prototype info: " << Brief(prototype_info());
@@ -856,6 +868,8 @@
   if (has_initial_map()) os << Brief(initial_map());
   os << "\n - shared_info = " << Brief(shared());
   os << "\n - name = " << Brief(shared()->name());
+  os << "\n - formal_parameter_count = "
+     << shared()->internal_formal_parameter_count();
   if (shared()->is_generator()) {
     os << "\n   - generator";
   }
@@ -868,9 +882,10 @@
 
 void SharedFunctionInfo::SharedFunctionInfoPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "SharedFunctionInfo");
-  os << "\n - name: " << Brief(name());
-  os << "\n - expected_nof_properties: " << expected_nof_properties();
-  os << "\n - ast_node_count: " << ast_node_count();
+  os << "\n - name = " << Brief(name());
+  os << "\n - formal_parameter_count = " << internal_formal_parameter_count();
+  os << "\n - expected_nof_properties = " << expected_nof_properties();
+  os << "\n - ast_node_count = " << ast_node_count();
   os << "\n - instance class name = ";
   instance_class_name()->Print(os);
   os << "\n - code = " << Brief(code());
@@ -1297,8 +1312,6 @@
          << ")";
     } else if (key == heap->strict_function_transition_symbol()) {
       os << " (transition to strict function)";
-    } else if (key == heap->strong_function_transition_symbol()) {
-      os << " (transition to strong function)";
     } else if (key == heap->observed_symbol()) {
       os << " (transition to Object.observe)";
     } else {