/*

 * 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);

}