--- old/src/share/vm/gc_implementation/g1/heapRegionType.cpp	2019-01-28 17:43:40.000000000 +0800
+++ new/src/share/vm/gc_implementation/g1/heapRegionType.cpp	2019-01-28 17:43:40.000000000 +0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,6 +23,7 @@
  */
 
 #include "precompiled.hpp"
+#include "gc_implementation/g1/g1HeapRegionTraceType.hpp"
 #include "gc_implementation/g1/heapRegionType.hpp"
 
 bool HeapRegionType::is_valid(Tag tag) {
@@ -67,3 +68,18 @@
   // keep some compilers happy
   return NULL;
 }
+
+G1HeapRegionTraceType::Type HeapRegionType::get_trace_type() {
+  hrt_assert_is_valid(_tag);
+  switch (_tag) {
+    case FreeTag:               return G1HeapRegionTraceType::Free;
+    case EdenTag:               return G1HeapRegionTraceType::Eden;
+    case SurvTag:               return G1HeapRegionTraceType::Survivor;
+    case HumStartsTag:          return G1HeapRegionTraceType::StartsHumongous;
+    case HumContTag:            return G1HeapRegionTraceType::ContinuesHumongous;
+    case OldTag:                return G1HeapRegionTraceType::Old;
+    default:
+      ShouldNotReachHere();
+      return G1HeapRegionTraceType::Free; // keep some compilers happy
+  }
+}