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.inline.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((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 }