diff -r e45861098f5a -r fec48bf5a827 hotspot/src/share/vm/gc/g1/g1ErgoVerbose.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc/g1/g1ErgoVerbose.cpp	Wed May 13 15:16:06 2015 +0200
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2011, 2015, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "gc/g1/g1ErgoVerbose.hpp"
+#include "utilities/ostream.hpp"
+
+ErgoLevel G1ErgoVerbose::_level;
+bool G1ErgoVerbose::_enabled[ErgoHeuristicNum];
+
+void G1ErgoVerbose::initialize() {
+  set_level(ErgoLow);
+  set_enabled(false);
+}
+
+void G1ErgoVerbose::set_level(ErgoLevel level) {
+  _level = level;
+}
+
+void G1ErgoVerbose::set_enabled(ErgoHeuristic n, bool enabled) {
+  assert(0 <= n && n < ErgoHeuristicNum, "pre-condition");
+  _enabled[n] = enabled;
+}
+
+void G1ErgoVerbose::set_enabled(bool enabled) {
+  for (int n = 0; n < ErgoHeuristicNum; n += 1) {
+    set_enabled((ErgoHeuristic) n, enabled);
+  }
+}
+
+const char* G1ErgoVerbose::to_string(int tag) {
+  ErgoHeuristic n = extract_heuristic(tag);
+  switch (n) {
+  case ErgoHeapSizing:        return "Heap Sizing";
+  case ErgoCSetConstruction:  return "CSet Construction";
+  case ErgoConcCycles:        return "Concurrent Cycles";
+  case ErgoMixedGCs:          return "Mixed GCs";
+  default:
+    ShouldNotReachHere();
+    // Keep the Windows compiler happy
+    return NULL;
+  }
+}