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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 "classfile/javaClasses.inline.hpp"
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#include "code/codeBlob.hpp"
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#include "code/codeCache.hpp"
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#include "gc/shared/gcCause.hpp"
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#include "gc/shared/gcName.hpp"
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#include "gc/shared/gcTrace.hpp"
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#include "gc/shared/gcWhen.hpp"
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#include "jfr/leakprofiler/checkpoint/objectSampleCheckpoint.hpp"
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#include "jfr/leakprofiler/leakProfiler.hpp"
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#include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
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#include "jfr/recorder/checkpoint/types/jfrType.hpp"
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#include "jfr/recorder/jfrRecorder.hpp"
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#include "jfr/recorder/checkpoint/types/jfrThreadGroup.hpp"
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#include "jfr/recorder/checkpoint/types/jfrThreadState.hpp"
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#include "jfr/recorder/checkpoint/types/jfrTypeSet.hpp"
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#include "jfr/support/jfrThreadLocal.hpp"
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#include "jfr/writers/jfrJavaEventWriter.hpp"
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#include "memory/metaspaceGCThresholdUpdater.hpp"
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#include "memory/referenceType.hpp"
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#include "memory/universe.hpp"
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#include "runtime/flags/jvmFlag.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/osThread.hpp"
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#include "runtime/safepoint.hpp"
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#include "runtime/synchronizer.hpp"
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#include "runtime/thread.inline.hpp"
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#include "runtime/vm_operations.hpp"
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#ifdef COMPILER2
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#include "opto/compile.hpp"
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#include "opto/node.hpp"
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#endif
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#if INCLUDE_G1GC
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#include "gc/g1/g1HeapRegionTraceType.hpp"
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#include "gc/g1/g1YCTypes.hpp"
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#endif
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// implementation for the static registration function exposed in the api
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bool JfrSerializer::register_serializer(JfrTypeId id, bool require_safepoint, bool permit_cache, JfrSerializer* cs) {
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assert(cs != NULL, "invariant");
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return JfrCheckpointManager::register_serializer(id, require_safepoint, permit_cache, cs);
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}
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class JfrCheckpointThreadCountClosure : public ThreadClosure {
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private:
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u4 _total_threads;
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public:
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JfrCheckpointThreadCountClosure() : _total_threads(0) {}
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u4 total_threads() { return _total_threads; }
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void do_thread(Thread *t) { _total_threads++; }
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};
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// Requires a ResourceMark for get_thread_name/as_utf8
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class JfrCheckpointThreadClosure : public ThreadClosure {
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private:
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JfrCheckpointWriter& _writer;
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Thread* _curthread;
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public:
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JfrCheckpointThreadClosure(JfrCheckpointWriter& writer) : _writer(writer), _curthread(Thread::current()) {}
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void do_thread(Thread* t);
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};
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// Requires a ResourceMark for get_thread_name/as_utf8
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void JfrCheckpointThreadClosure::do_thread(Thread* t) {
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assert(t != NULL, "invariant");
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assert_locked_or_safepoint(Threads_lock);
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_writer.write_key(t->jfr_thread_local()->thread_id());
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_writer.write(t->name());
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const OSThread* const os_thread = t->osthread();
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_writer.write<traceid>(os_thread != NULL ? os_thread->thread_id() : (u8)0);
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if (t->is_Java_thread()) {
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JavaThread* const jt = (JavaThread*)t;
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_writer.write(jt->name());
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_writer.write(java_lang_Thread::thread_id(jt->threadObj()));
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_writer.write(JfrThreadGroup::thread_group_id(jt, _curthread));
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// since we are iterating threads during a safepoint, also issue notification
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JfrJavaEventWriter::notify(jt);
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return;
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}
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_writer.write((const char*)NULL); // java name
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_writer.write<traceid>((traceid)0); // java thread id
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_writer.write<traceid>((traceid)0); // java thread group
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}
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void JfrThreadConstantSet::serialize(JfrCheckpointWriter& writer) {
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assert(SafepointSynchronize::is_at_safepoint(), "invariant");
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JfrCheckpointThreadCountClosure tcc;
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Threads::threads_do(&tcc);
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const u4 total_threads = tcc.total_threads();
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// THREADS
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writer.write_count(total_threads);
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JfrCheckpointThreadClosure tc(writer);
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Threads::threads_do(&tc);
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}
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void JfrThreadGroupConstant::serialize(JfrCheckpointWriter& writer) {
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assert(SafepointSynchronize::is_at_safepoint(), "invariant");
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JfrThreadGroup::serialize(writer);
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}
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static const char* flag_value_origin_to_string(JVMFlag::Flags origin) {
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switch (origin) {
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case JVMFlag::DEFAULT: return "Default";
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case JVMFlag::COMMAND_LINE: return "Command line";
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case JVMFlag::ENVIRON_VAR: return "Environment variable";
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case JVMFlag::CONFIG_FILE: return "Config file";
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case JVMFlag::MANAGEMENT: return "Management";
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case JVMFlag::ERGONOMIC: return "Ergonomic";
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case JVMFlag::ATTACH_ON_DEMAND: return "Attach on demand";
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case JVMFlag::INTERNAL: return "Internal";
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default: ShouldNotReachHere(); return "";
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}
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}
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void FlagValueOriginConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = JVMFlag::LAST_VALUE_ORIGIN + 1;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(flag_value_origin_to_string((JVMFlag::Flags)i));
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}
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}
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void MonitorInflateCauseConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = ObjectSynchronizer::inflate_cause_nof;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(ObjectSynchronizer::inflate_cause_name((ObjectSynchronizer::InflateCause)i));
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}
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}
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void GCCauseConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = GCCause::_last_gc_cause;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(GCCause::to_string((GCCause::Cause)i));
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}
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}
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void GCNameConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = GCNameEndSentinel;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(GCNameHelper::to_string((GCName)i));
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}
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}
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void GCWhenConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = GCWhen::GCWhenEndSentinel;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(GCWhen::to_string((GCWhen::Type)i));
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}
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}
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void G1HeapRegionTypeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
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}
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}
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void GCThresholdUpdaterConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i));
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}
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}
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void MetadataTypeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = Metaspace::MetadataTypeCount;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(Metaspace::metadata_type_name((Metaspace::MetadataType)i));
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}
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}
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void MetaspaceObjectTypeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = MetaspaceObj::_number_of_types;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i));
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}
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}
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void G1YCTypeConstant::serialize(JfrCheckpointWriter& writer) {
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#if INCLUDE_G1GC
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static const u4 nof_entries = G1YCTypeEndSentinel;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(G1YCTypeHelper::to_string((G1YCType)i));
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}
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#endif
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}
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static const char* reference_type_to_string(ReferenceType rt) {
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switch (rt) {
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case REF_NONE: return "None reference";
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case REF_OTHER: return "Other reference";
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case REF_SOFT: return "Soft reference";
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case REF_WEAK: return "Weak reference";
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case REF_FINAL: return "Final reference";
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case REF_PHANTOM: return "Phantom reference";
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default:
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ShouldNotReachHere();
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return NULL;
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}
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}
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void ReferenceTypeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = REF_PHANTOM + 1;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(reference_type_to_string((ReferenceType)i));
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}
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}
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void NarrowOopModeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = Universe::HeapBasedNarrowOop + 1;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_MODE)i));
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}
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}
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void CompilerPhaseTypeConstant::serialize(JfrCheckpointWriter& writer) {
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#ifdef COMPILER2
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static const u4 nof_entries = PHASE_NUM_TYPES;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
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}
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#endif
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}
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void CodeBlobTypeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = CodeBlobType::NumTypes;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(CodeCache::get_code_heap_name(i));
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}
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};
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void VMOperationTypeConstant::serialize(JfrCheckpointWriter& writer) {
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static const u4 nof_entries = VM_Operation::VMOp_Terminating;
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writer.write_count(nof_entries);
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for (u4 i = 0; i < nof_entries; ++i) {
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writer.write_key(i);
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writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i)));
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}
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}
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class TypeSetSerialization {
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private:
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bool _class_unload;
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public:
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explicit TypeSetSerialization(bool class_unload) : _class_unload(class_unload) {}
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void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) {
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JfrTypeSet::serialize(&writer, leakp_writer, _class_unload);
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}
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};
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void ClassUnloadTypeSet::serialize(JfrCheckpointWriter& writer) {
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TypeSetSerialization type_set(true);
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if (LeakProfiler::is_running()) {
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JfrCheckpointWriter leakp_writer(false, true, Thread::current());
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type_set.write(writer, &leakp_writer);
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ObjectSampleCheckpoint::install(leakp_writer, true, true);
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return;
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}
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type_set.write(writer, NULL);
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};
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void TypeSet::serialize(JfrCheckpointWriter& writer) {
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TypeSetSerialization type_set(false);
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if (LeakProfiler::is_suspended()) {
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JfrCheckpointWriter leakp_writer(false, true, Thread::current());
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type_set.write(writer, &leakp_writer);
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ObjectSampleCheckpoint::install(leakp_writer, false, true);
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return;
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}
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type_set.write(writer, NULL);
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};
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void ThreadStateConstant::serialize(JfrCheckpointWriter& writer) {
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JfrThreadState::serialize(writer);
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}
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void JfrThreadConstant::serialize(JfrCheckpointWriter& writer) {
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assert(_thread != NULL, "invariant");
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assert(_thread == Thread::current(), "invariant");
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assert(_thread->is_Java_thread(), "invariant");
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assert(!_thread->jfr_thread_local()->has_thread_checkpoint(), "invariant");
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ResourceMark rm(_thread);
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const oop threadObj = _thread->threadObj();
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assert(threadObj != NULL, "invariant");
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const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj);
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const char* const thread_name = _thread->name();
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const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread);
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writer.write_count(1);
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writer.write_key(_thread->jfr_thread_local()->thread_id());
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writer.write(thread_name);
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writer.write((u8)_thread->osthread()->thread_id());
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writer.write(thread_name);
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writer.write(java_lang_thread_id);
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writer.write(thread_group_id);
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JfrThreadGroup::serialize(&writer, thread_group_id);
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}
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