1 /*

     2  * Copyright (c) 2019, Red Hat, Inc. All rights reserved.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.

     7  *

     8  * This code is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    11  * version 2 for more details (a copy is included in the LICENSE file that

    12  * accompanied this code).

    13  *

    14  * You should have received a copy of the GNU General Public License version

    15  * 2 along with this work; if not, write to the Free Software Foundation,

    16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    17  *

    18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * or visit www.oracle.com if you need additional information or have any

    20  * questions.

    21  *

    22  */

    23 

    24 #include "precompiled.hpp"

    25 #include "gc/shenandoah/shenandoahHeap.hpp"

    26 #include "gc/shenandoah/shenandoahHeapRegion.hpp"

    27 #include "gc/shenandoah/shenandoahJfrSupport.hpp"

    28 #include "jfr/jfrEvents.hpp"

    29 #if INCLUDE_JFR

    30 #include "jfr/metadata/jfrSerializer.hpp"

    31 #endif

    32 

    33 #if INCLUDE_JFR

    34 

    35 class ShenandoahHeapRegionStateConstant : public JfrSerializer {

    36   friend class ShenandoahHeapRegion;

    37 public:

    38   virtual void serialize(JfrCheckpointWriter& writer) {

    39     static const u4 nof_entries = ShenandoahHeapRegion::region_states_num();

    40     writer.write_count(nof_entries);

    41     for (u4 i = 0; i < nof_entries; ++i) {

    42       writer.write_key(i);

    43       writer.write(ShenandoahHeapRegion::region_state_to_string((ShenandoahHeapRegion::RegionState)i));

    44     }

    45   }

    46 };

    47 

    48 void ShenandoahJFRSupport::register_jfr_type_serializers() {

    49   JfrSerializer::register_serializer(TYPE_SHENANDOAHHEAPREGIONSTATE,

    50                                      false,

    51                                      true,

    52                                      new ShenandoahHeapRegionStateConstant());

    53 }

    54 #endif

    55 

    56 class ShenandoahDumpHeapRegionInfoClosure : public ShenandoahHeapRegionClosure {

    57 public:

    58   virtual void heap_region_do(ShenandoahHeapRegion* r) {

    59     EventShenandoahHeapRegionInformation evt;

    60     evt.set_index(r->region_number());

    61     evt.set_state((u8)r->state());

    62     evt.set_start((uintptr_t)r->bottom());

    63     evt.set_used(r->used());

    64     evt.commit();

    65   }

    66 };

    67 

    68 void VM_ShenandoahSendHeapRegionInfoEvents::doit() {

    69   ShenandoahDumpHeapRegionInfoClosure c;

    70   ShenandoahHeap::heap()->heap_region_iterate(&c);

    71 }