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_implementation/shenandoah/shenandoahHeap.inline.hpp"
  26 #include "gc_implementation/shenandoah/shenandoahHeapRegion.hpp"
  27 #include "gc_implementation/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((unsigned)r->index());
  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 }