--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahJfrSupport.cpp	Tue May 21 10:36:23 2019 +0200
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
+ *
+ * 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/shenandoah/shenandoahHeap.hpp"
+#include "gc/shenandoah/shenandoahHeapRegion.hpp"
+#include "gc/shenandoah/shenandoahJfrSupport.hpp"
+#include "jfr/jfrEvents.hpp"
+#if INCLUDE_JFR
+#include "jfr/metadata/jfrSerializer.hpp"
+#endif
+
+#if INCLUDE_JFR
+
+class ShenandoahHeapRegionStateConstant : public JfrSerializer {
+  friend class ShenandoahHeapRegion;
+public:
+  virtual void serialize(JfrCheckpointWriter& writer) {
+    static const u4 nof_entries = ShenandoahHeapRegion::region_states_num();
+    writer.write_count(nof_entries);
+    for (u4 i = 0; i < nof_entries; ++i) {
+      writer.write_key(i);
+      writer.write(ShenandoahHeapRegion::region_state_to_string((ShenandoahHeapRegion::RegionState)i));
+    }
+  }
+};
+
+void ShenandoahJFRSupport::register_jfr_type_serializers() {
+  JfrSerializer::register_serializer(TYPE_SHENANDOAHHEAPREGIONSTATE,
+                                     false,
+                                     true,
+                                     new ShenandoahHeapRegionStateConstant());
+}
+#endif
+
+class ShenandoahDumpHeapRegionInfoClosure : public ShenandoahHeapRegionClosure {
+public:
+  virtual void heap_region_do(ShenandoahHeapRegion* r) {
+    EventShenandoahHeapRegionInformation evt;
+    evt.set_index(r->region_number());
+    evt.set_state((u8)r->state());
+    evt.set_start((uintptr_t)r->bottom());
+    evt.set_used(r->used());
+    evt.commit();
+  }
+};
+
+void VM_ShenandoahSendHeapRegionInfoEvents::doit() {
+  ShenandoahDumpHeapRegionInfoClosure c;
+  ShenandoahHeap::heap()->heap_region_iterate(&c);
+}