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shenandoahJfrSupport.cpp
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shenandoahJfrSupport.cpp
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/*
* Copyright (c) 2019, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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,
true,
new ShenandoahHeapRegionStateConstant());
}
#endif
class ShenandoahDumpHeapRegionInfoClosure : public ShenandoahHeapRegionClosure {
public:
virtual void heap_region_do(ShenandoahHeapRegion* r) {
EventShenandoahHeapRegionInformation evt;
evt.set_index((unsigned) r->index());
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);
}