--- /dev/null	2019-01-28 17:46:56.000000000 +0800
+++ new/src/share/vm/jfr/recorder/checkpoint/constant/jfrConstant.cpp	2019-01-28 17:46:55.000000000 +0800
@@ -0,0 +1,348 @@
+/*
+ * Copyright (c) 2016, 2019, Oracle and/or its affiliates. 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 "classfile/javaClasses.hpp"
+#include "code/codeBlob.hpp"
+#include "code/codeCache.hpp"
+#include "gc_interface/gcCause.hpp"
+#include "gc_interface/gcName.hpp"
+#include "gc_implementation/shared/gcTrace.hpp"
+#include "gc_implementation/shared/gcWhen.hpp"
+#include "jfr/recorder/access/jfrThreadData.hpp"
+#include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
+#include "jfr/recorder/checkpoint/constant/jfrConstant.hpp"
+#include "jfr/recorder/jfrRecorder.hpp"
+#include "jfr/recorder/checkpoint/constant/jfrTagSet.hpp"
+#include "jfr/recorder/checkpoint/constant/jfrThreadGroup.hpp"
+#include "jfr/leakprofiler/checkpoint/objectSampleCheckpoint.hpp"
+#include "jfr/leakprofiler/leakProfiler.hpp"
+#include "jfr/writers/jfrJavaEventWriter.hpp"
+#include "memory/metaspaceGCThresholdUpdater.hpp"
+#include "memory/referenceType.hpp"
+#include "memory/universe.hpp"
+#include "runtime/mutexLocker.hpp"
+#include "runtime/osThread.hpp"
+#include "runtime/safepoint.hpp"
+#include "runtime/synchronizer.hpp"
+#include "runtime/thread.inline.hpp"
+#include "runtime/vm_operations.hpp"
+#include "trace/traceVM.hpp"
+
+#ifdef COMPILER2
+#include "opto/compile.hpp"
+#include "opto/node.hpp"
+#endif
+#if INCLUDE_ALL_GCS
+#include "gc_implementation/g1/g1HeapRegionTraceType.hpp"
+#include "gc_implementation/g1/g1YCTypes.hpp"
+#endif
+
+// implementation for the static registration function exposed in the api
+bool JfrConstantSerializer::register_serializer(JfrConstantTypeId id, bool require_safepoint, bool permit_cache, JfrConstantSerializer* cs) {
+  assert(cs != NULL, "invariant");
+  return JfrCheckpointManager::register_serializer(id, require_safepoint, permit_cache, cs);
+}
+
+class JfrCheckpointThreadCountClosure : public ThreadClosure {
+private:
+  u4 _total_threads;
+public:
+  JfrCheckpointThreadCountClosure() : _total_threads(0) {}
+  u4 total_threads() { return _total_threads; }
+  void do_thread(Thread *t) { _total_threads++; }
+};
+
+// Requires a ResourceMark for get_thread_name/as_utf8
+class JfrCheckpointThreadClosure : public ThreadClosure {
+ private:
+  JfrCheckpointWriter& _writer;
+  Thread* _curthread;
+ public:
+  JfrCheckpointThreadClosure(JfrCheckpointWriter& writer) : _writer(writer), _curthread(Thread::current()) {}
+  void do_thread(Thread* t);
+};
+
+// Requires a ResourceMark for get_thread_name/as_utf8
+void JfrCheckpointThreadClosure::do_thread(Thread* t) {
+  assert(t != NULL, "invariant");
+  assert_locked_or_safepoint(Threads_lock);
+  _writer.write_key(t->trace_data()->thread_id());
+  _writer.write(t->name());
+  const OSThread* const os_thread = t->osthread();
+  _writer.write<traceid>(os_thread != NULL ? os_thread->thread_id() : (u8)0);
+  if (t->is_Java_thread()) {
+    JavaThread* const jt = (JavaThread*)t;
+    _writer.write(jt->name());
+    _writer.write(java_lang_Thread::thread_id(jt->threadObj()));
+    _writer.write(JfrThreadGroup::thread_group_id(jt, _curthread));
+    // since we are iterating threads during a safepoint, also issue notification
+    JfrJavaEventWriter::notify(jt);
+    return;
+  }
+  _writer.write((const char*)NULL); // java name
+  _writer.write<traceid>((traceid)0); // java thread id
+  _writer.write<traceid>((traceid)0); // java thread group
+}
+
+void JfrThreadConstantSet::write_constants(JfrCheckpointWriter& writer) {
+  assert(SafepointSynchronize::is_at_safepoint(), "invariant");
+  JfrCheckpointThreadCountClosure tcc;
+  Threads::threads_do(&tcc);
+  const u4 total_threads = tcc.total_threads();
+  // THREADS
+  writer.write_number_of_constants(total_threads);
+  JfrCheckpointThreadClosure tc(writer);
+  Threads::threads_do(&tc);
+}
+
+void JfrThreadGroupConstant::write_constants(JfrCheckpointWriter& writer) {
+  assert(SafepointSynchronize::is_at_safepoint(), "invariant");
+  JfrThreadGroup::write(writer);
+}
+
+static const char* flag_value_origin_to_string(Flag::Flags origin) {
+  switch (origin) {
+    case Flag::DEFAULT: return "Default";
+    case Flag::COMMAND_LINE: return "Command line";
+    case Flag::ENVIRON_VAR: return "Environment variable";
+    case Flag::CONFIG_FILE: return "Config file";
+    case Flag::MANAGEMENT: return "Management";
+    case Flag::ERGONOMIC: return "Ergonomic";
+    case Flag::ATTACH_ON_DEMAND: return "Attach on demand";
+    case Flag::INTERNAL: return "Internal";
+    default: ShouldNotReachHere(); return "";
+  }
+}
+
+void FlagValueOriginConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = Flag::LAST_VALUE_ORIGIN + 1;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(flag_value_origin_to_string((Flag::Flags)i));
+  }
+}
+
+void GCCauseConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = GCCause::_last_gc_cause;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(GCCause::to_string((GCCause::Cause)i));
+  }
+}
+
+void GCNameConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = GCNameEndSentinel;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(GCNameHelper::to_string((GCName)i));
+  }
+}
+
+void GCWhenConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = GCWhen::GCWhenEndSentinel;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(GCWhen::to_string((GCWhen::Type)i));
+  }
+}
+
+void G1HeapRegionTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
+  }
+}
+
+void GCThresholdUpdaterConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i));
+  }
+}
+
+void MetadataTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = Metaspace::MetadataTypeCount;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(Metaspace::metadata_type_name((Metaspace::MetadataType)i));
+  }
+}
+
+void MetaspaceObjTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = MetaspaceObj::_number_of_types;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i));
+  }
+}
+
+void G1YCTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+#if INCLUDE_ALL_GCS
+  static const u4 nof_entries = G1YCTypeEndSentinel;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(G1YCTypeHelper::to_string((G1YCType)i));
+  }
+#endif
+}
+
+static const char* reference_type_to_string(ReferenceType rt) {
+  switch (rt) {
+    case REF_NONE: return "None reference";
+    case REF_OTHER: return "Other reference";
+    case REF_SOFT: return "Soft reference";
+    case REF_WEAK: return "Weak reference";
+    case REF_FINAL: return "Final reference";
+    case REF_PHANTOM: return "Phantom reference";
+    default:
+      ShouldNotReachHere();
+    return NULL;
+  }
+}
+
+void ReferenceTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = REF_PHANTOM + 1;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(reference_type_to_string((ReferenceType)i));
+  }
+}
+
+void NarrowOopModeConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = Universe::HeapBasedNarrowOop + 1;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_MODE)i));
+  }
+}
+
+void CompilerPhaseTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+#ifdef COMPILER2
+  static const u4 nof_entries = PHASE_NUM_TYPES;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
+  }
+#endif
+}
+
+void CodeBlobTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+  // only one code blob now in ajdk8
+  static const u4 nof_entries = CodeBlobType::NumTypes;
+  writer.write_number_of_constants(nof_entries);
+  writer.write_key((u4)CodeBlobType::All);
+  writer.write("CodeCache");
+};
+
+void VMOperationTypeConstant::write_constants(JfrCheckpointWriter& writer) {
+  static const u4 nof_entries = VM_Operation::VMOp_Terminating;
+  writer.write_number_of_constants(nof_entries);
+  for (u4 i = 0; i < nof_entries; ++i) {
+    writer.write_key(i);
+    writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i)));
+  }
+}
+
+class ConstantTagSet {
+ private:
+  bool _class_unload;
+ public:
+  explicit ConstantTagSet(bool class_unload) : _class_unload(class_unload) {}
+  void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) {
+    JfrTagSet::write(&writer, leakp_writer, _class_unload);
+  }
+};
+
+void ClassUnloadConstantSet::write_constants(JfrCheckpointWriter& writer) {
+  ConstantTagSet tag_set(true);
+  if (LeakProfiler::is_running()) {
+    JfrCheckpointWriter leakp_writer(false, true, Thread::current());
+    tag_set.write(writer, &leakp_writer);
+    ObjectSampleCheckpoint::install(leakp_writer, true, true);
+    return;
+  }
+  tag_set.write(writer, NULL);
+};
+
+void ConstantSet::write_constants(JfrCheckpointWriter& writer) {
+  ConstantTagSet tag_set(false);
+  if (LeakProfiler::is_suspended()) {
+    JfrCheckpointWriter leakp_writer(false, true, Thread::current());
+    tag_set.write(writer, &leakp_writer);
+    ObjectSampleCheckpoint::install(leakp_writer, false, true);
+    return;
+  }
+  tag_set.write(writer, NULL);
+};
+
+void ThreadStateConstant::write_constants(JfrCheckpointWriter& writer) {
+  // Thread states
+  {
+    enum {
+#define _dummy_enum(n, v)  _dummy_##n,
+      MAKE_JAVATHREAD_STATES(_dummy_enum)
+      NUM_JAVATHREAD_STATES
+    };
+
+    writer.write_number_of_constants(NUM_JAVATHREAD_STATES);
+#define _write_ts(n, v)    writer.write<u8>(v); writer.write(#n);
+    MAKE_JAVATHREAD_STATES(_write_ts)
+  }
+}
+
+void JfrThreadConstant::write_constants(JfrCheckpointWriter& writer) {
+  assert(_thread != NULL, "invariant");
+  assert(_thread == Thread::current(), "invariant");
+  assert(_thread->is_Java_thread(), "invariant");
+  assert(!_thread->trace_data()->has_thread_checkpoint(), "invariant");
+  ResourceMark rm(_thread);
+  const oop threadObj = _thread->threadObj();
+  assert(threadObj != NULL, "invariant");
+  const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj);
+  const char* const thread_name = _thread->name();
+  const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread);
+  writer.write_number_of_constants(1);
+  writer.write_key(_thread->trace_data()->thread_id());
+  writer.write(thread_name);
+  writer.write((u8)_thread->osthread()->thread_id());
+  writer.write(thread_name);
+  writer.write(java_lang_thread_id);
+  writer.write(thread_group_id);
+  JfrThreadGroup::write(&writer, thread_group_id);
+}