--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/src/hotspot/share/gc/g1/g1HeapRegionEventSender.cpp	2018-04-09 14:27:14.391406825 +0200
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2016, 2018, 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/g1CollectedHeap.hpp"
+#include "gc/g1/heapRegion.hpp"
+#include "g1HeapRegionEventSender.hpp"
+#include "tracefiles/traceEventClasses.hpp"
+
+
+class DumpEventInfoClosure : public HeapRegionClosure {
+public:
+  bool do_heap_region(HeapRegion* r) {
+    EventG1HeapRegionInformation evt;
+    evt.set_index(r->hrm_index());
+    evt.set_type(r->get_trace_type());
+    evt.set_start((uintptr_t)r->bottom());
+    evt.set_used(r->used());
+    evt.commit();
+    return false;
+  }
+};
+
+
+void G1HeapRegionEventSender::send_events() {
+  DumpEventInfoClosure c;
+
+  G1CollectedHeap::heap()->heap_region_iterate(&c);
+}