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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp"
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#include "jfr/recorder/checkpoint/types/jfrType.hpp"
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#include "jfr/recorder/checkpoint/types/jfrTypeManager.hpp"
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#include "jfr/utilities/jfrIterator.hpp"
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#include "runtime/safepoint.hpp"
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#include "runtime/thread.inline.hpp"
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#include "utilities/exceptions.hpp"
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JfrSerializerRegistration::JfrSerializerRegistration(JfrTypeId id, bool permit_cache, JfrSerializer* cs) :
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_next(NULL),
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_prev(NULL),
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_serializer(cs),
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_cache(),
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_id(id),
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_permit_cache(permit_cache) {}
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JfrSerializerRegistration::~JfrSerializerRegistration() {
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delete _serializer;
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}
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JfrSerializerRegistration* JfrSerializerRegistration::next() const {
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return _next;
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}
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void JfrSerializerRegistration::set_next(JfrSerializerRegistration* next) {
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_next = next;
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}
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JfrSerializerRegistration* JfrSerializerRegistration::prev() const {
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return _prev;
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}
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void JfrSerializerRegistration::set_prev(JfrSerializerRegistration* prev) {
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_prev = prev;
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}
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JfrTypeId JfrSerializerRegistration::id() const {
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return _id;
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}
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void JfrSerializerRegistration::invoke_serializer(JfrCheckpointWriter& writer) const {
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if (_cache.valid()) {
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writer.increment();
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_cache->write(writer);
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return;
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}
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const JfrCheckpointContext ctx = writer.context();
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writer.write_type(_id);
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_serializer->serialize(writer);
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if (_permit_cache) {
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_cache = writer.copy(&ctx);
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}
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}
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JfrTypeManager::~JfrTypeManager() {
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Iterator iter(_types);
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JfrSerializerRegistration* registration;
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while (iter.has_next()) {
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registration = _types.remove(iter.next());
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assert(registration != NULL, "invariant");
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delete registration;
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}
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Iterator sp_type_iter(_safepoint_types);
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while (sp_type_iter.has_next()) {
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registration = _safepoint_types.remove(sp_type_iter.next());
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assert(registration != NULL, "invariant");
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delete registration;
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}
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}
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size_t JfrTypeManager::number_of_registered_types() const {
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size_t count = 0;
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const Iterator iter(_types);
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while (iter.has_next()) {
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++count;
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iter.next();
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}
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const Iterator sp_type_iter(_safepoint_types);
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while (sp_type_iter.has_next()) {
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++count;
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sp_type_iter.next();
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}
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return count;
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}
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void JfrTypeManager::write_types(JfrCheckpointWriter& writer) const {
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const Iterator iter(_types);
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while (iter.has_next()) {
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iter.next()->invoke_serializer(writer);
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}
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}
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void JfrTypeManager::write_safepoint_types(JfrCheckpointWriter& writer) const {
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assert(SafepointSynchronize::is_at_safepoint(), "invariant");
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const Iterator iter(_safepoint_types);
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while (iter.has_next()) {
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iter.next()->invoke_serializer(writer);
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}
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}
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void JfrTypeManager::write_type_set() const {
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assert(!SafepointSynchronize::is_at_safepoint(), "invariant");
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// can safepoint here because of Module_lock
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MutexLockerEx lock(Module_lock);
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JfrCheckpointWriter writer(true, true, Thread::current());
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TypeSet set;
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set.serialize(writer);
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}
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void JfrTypeManager::write_type_set_for_unloaded_classes() const {
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assert(SafepointSynchronize::is_at_safepoint(), "invariant");
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JfrCheckpointWriter writer(false, true, Thread::current());
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ClassUnloadTypeSet class_unload_set;
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class_unload_set.serialize(writer);
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}
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void JfrTypeManager::create_thread_checkpoint(JavaThread* jt) const {
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assert(jt != NULL, "invariant");
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JfrThreadConstant type_thread(jt);
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JfrCheckpointWriter writer(false, true, jt);
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writer.write_type(TYPE_THREAD);
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type_thread.serialize(writer);
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// create and install a checkpoint blob
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jt->jfr_thread_local()->set_thread_checkpoint(writer.checkpoint_blob());
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assert(jt->jfr_thread_local()->has_thread_checkpoint(), "invariant");
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}
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void JfrTypeManager::write_thread_checkpoint(JavaThread* jt) const {
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assert(jt != NULL, "JavaThread is NULL!");
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ResourceMark rm(jt);
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if (jt->jfr_thread_local()->has_thread_checkpoint()) {
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JfrCheckpointWriter writer(false, false, jt);
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jt->jfr_thread_local()->thread_checkpoint()->write(writer);
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} else {
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JfrThreadConstant type_thread(jt);
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JfrCheckpointWriter writer(false, true, jt);
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writer.write_type(TYPE_THREAD);
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type_thread.serialize(writer);
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}
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}
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#ifdef ASSERT
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static void assert_not_registered_twice(JfrTypeId id, JfrTypeManager::List& list) {
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const JfrTypeManager::Iterator iter(list);
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while (iter.has_next()) {
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assert(iter.next()->id() != id, "invariant");
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}
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}
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#endif
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bool JfrTypeManager::register_serializer(JfrTypeId id, bool require_safepoint, bool permit_cache, JfrSerializer* cs) {
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assert(cs != NULL, "invariant");
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JfrSerializerRegistration* const registration = new JfrSerializerRegistration(id, permit_cache, cs);
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if (registration == NULL) {
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delete cs;
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return false;
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}
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if (require_safepoint) {
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assert(!_safepoint_types.in_list(registration), "invariant");
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DEBUG_ONLY(assert_not_registered_twice(id, _safepoint_types);)
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_safepoint_types.prepend(registration);
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}
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else {
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assert(!_types.in_list(registration), "invariant");
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DEBUG_ONLY(assert_not_registered_twice(id, _types);)
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_types.prepend(registration);
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}
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return true;
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}
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bool JfrTypeManager::initialize() {
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// register non-safepointing type serialization
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for (size_t i = 0; i < 16; ++i) {
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switch (i) {
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case 0: register_serializer(TYPE_FLAGVALUEORIGIN, false, true, new FlagValueOriginConstant()); break;
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case 1: register_serializer(TYPE_INFLATECAUSE, false, true, new MonitorInflateCauseConstant()); break;
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case 2: register_serializer(TYPE_GCCAUSE, false, true, new GCCauseConstant()); break;
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case 3: register_serializer(TYPE_GCNAME, false, true, new GCNameConstant()); break;
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case 4: register_serializer(TYPE_GCWHEN, false, true, new GCWhenConstant()); break;
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case 5: register_serializer(TYPE_G1HEAPREGIONTYPE, false, true, new G1HeapRegionTypeConstant()); break;
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case 6: register_serializer(TYPE_GCTHRESHOLDUPDATER, false, true, new GCThresholdUpdaterConstant()); break;
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case 7: register_serializer(TYPE_METADATATYPE, false, true, new MetadataTypeConstant()); break;
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case 8: register_serializer(TYPE_METASPACEOBJECTTYPE, false, true, new MetaspaceObjectTypeConstant()); break;
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case 9: register_serializer(TYPE_G1YCTYPE, false, true, new G1YCTypeConstant()); break;
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case 10: register_serializer(TYPE_REFERENCETYPE, false, true, new ReferenceTypeConstant()); break;
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case 11: register_serializer(TYPE_NARROWOOPMODE, false, true, new NarrowOopModeConstant()); break;
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case 12: register_serializer(TYPE_COMPILERPHASETYPE, false, true, new CompilerPhaseTypeConstant()); break;
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case 13: register_serializer(TYPE_CODEBLOBTYPE, false, true, new CodeBlobTypeConstant()); break;
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case 14: register_serializer(TYPE_VMOPERATIONTYPE, false, true, new VMOperationTypeConstant()); break;
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case 15: register_serializer(TYPE_THREADSTATE, false, true, new ThreadStateConstant()); break;
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default:
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guarantee(false, "invariant");
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}
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}
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// register safepointing type serialization
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for (size_t i = 0; i < 2; ++i) {
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switch (i) {
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case 0: register_serializer(TYPE_THREADGROUP, true, false, new JfrThreadGroupConstant()); break;
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case 1: register_serializer(TYPE_THREAD, true, false, new JfrThreadConstantSet()); break;
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default:
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guarantee(false, "invariant");
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}
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}
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return true;
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}
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