--- /dev/null	2019-01-28 17:45:23.000000000 +0800
+++ new/src/share/vm/gc_implementation/shared/ageTableTracer.cpp	2019-01-28 17:45:22.000000000 +0800
@@ -0,0 +1,44 @@
+/*
+ * 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
+ * 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_implementation/shared/ageTableTracer.hpp"
+#include "gc_implementation/shared/gcId.hpp"
+#include "trace/tracing.hpp"
+
+void AgeTableTracer::send_tenuring_distribution_event(uint age, size_t size) {
+  EventTenuringDistribution e;
+  if (e.should_commit()) {
+    // FIXME gc id ...
+    e.set_gcId(GCId::peek().id() - 1);
+    e.set_age(age);
+    e.set_size(size);
+    e.commit();
+  }
+}
+
+bool AgeTableTracer::is_tenuring_distribution_event_enabled() {
+  return EventTenuringDistribution::is_enabled();
+}
+