--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/recorder/jfrRecorder.cpp	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,360 @@
+/*
+ * Copyright (c) 2012, 2018, 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 "jfr/dcmd/jfrDcmds.hpp"
+#include "jfr/instrumentation/jfrJvmtiAgent.hpp"
+#include "jfr/jni/jfrJavaSupport.hpp"
+#include "jfr/periodic/jfrOSInterface.hpp"
+#include "jfr/periodic/sampling/jfrThreadSampler.hpp"
+#include "jfr/recorder/jfrRecorder.hpp"
+#include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
+#include "jfr/recorder/repository/jfrRepository.hpp"
+#include "jfr/recorder/service/jfrOptionSet.hpp"
+#include "jfr/recorder/service/jfrPostBox.hpp"
+#include "jfr/recorder/service/jfrRecorderService.hpp"
+#include "jfr/recorder/service/jfrRecorderThread.hpp"
+#include "jfr/recorder/storage/jfrStorage.hpp"
+#include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"
+#include "jfr/recorder/stringpool/jfrStringPool.hpp"
+#include "jfr/utilities/jfrTime.hpp"
+#include "jfr/writers/jfrJavaEventWriter.hpp"
+#include "logging/log.hpp"
+#include "logging/logStream.hpp"
+#include "memory/resourceArea.inline.hpp"
+#include "runtime/handles.inline.hpp"
+#include "runtime/flags/jvmFlag.hpp"
+#include "runtime/globals.hpp"
+
+static bool is_disabled_on_command_line() {
+  static const size_t length = strlen("FlightRecorder");
+  static JVMFlag* const flight_recorder_flag = JVMFlag::find_flag("FlightRecorder", length);
+  assert(flight_recorder_flag != NULL, "invariant");
+  return flight_recorder_flag->is_command_line() ? !FlightRecorder : false;
+}
+
+bool JfrRecorder::is_disabled() {
+  return is_disabled_on_command_line();
+}
+
+static bool set_flight_recorder_flag(bool flag_value) {
+  JVMFlag::boolAtPut((char*)"FlightRecorder", &flag_value, JVMFlag::MANAGEMENT);
+  return FlightRecorder;
+}
+
+static bool _enabled = false;
+
+static bool enable() {
+  assert(!_enabled, "invariant");
+  _enabled = set_flight_recorder_flag(true);
+  return _enabled;
+}
+
+bool JfrRecorder::is_enabled() {
+  return _enabled;
+}
+
+bool JfrRecorder::on_vm_init() {
+  if (!is_disabled()) {
+    if (FlightRecorder || StartFlightRecording != NULL) {
+      enable();
+    }
+  }
+  // fast time initialization
+  return JfrTime::initialize();
+}
+
+static JfrStartFlightRecordingDCmd* _startup_recording = NULL;
+
+// Parsing options here to detect errors as soon as possible
+static bool parse_startup_recording(TRAPS) {
+  assert(StartFlightRecording != NULL, "invariant");
+  CmdLine cmdline(StartFlightRecording, strlen(StartFlightRecording), true);
+  _startup_recording->parse(&cmdline, ',', THREAD);
+  if (HAS_PENDING_EXCEPTION) {
+    java_lang_Throwable::print(PENDING_EXCEPTION, tty);
+    CLEAR_PENDING_EXCEPTION;
+    return false;
+  }
+  return true;
+}
+
+static bool initialize_startup_recording(TRAPS) {
+  if (StartFlightRecording != NULL) {
+    _startup_recording = new (ResourceObj::C_HEAP, mtTracing) JfrStartFlightRecordingDCmd(tty, true);
+    return _startup_recording != NULL && parse_startup_recording(THREAD);
+  }
+  return true;
+}
+
+static bool startup_recording(TRAPS) {
+  if (_startup_recording == NULL) {
+    return true;
+  }
+  log_trace(jfr, system)("Starting up Jfr startup recording");
+  _startup_recording->execute(DCmd_Source_Internal, Thread::current());
+  delete _startup_recording;
+  _startup_recording = NULL;
+  if (HAS_PENDING_EXCEPTION) {
+    log_debug(jfr, system)("Exception while starting Jfr startup recording");
+    CLEAR_PENDING_EXCEPTION;
+    return false;
+  }
+  log_trace(jfr, system)("Finished starting Jfr startup recording");
+  return true;
+}
+
+static void log_jdk_jfr_module_resolution_error(TRAPS) {
+  LogTarget(Error, jfr, system) lt_error;
+  LogTargetHandle handle(lt_error);
+  LogStream stream(handle);
+  JfrJavaSupport::is_jdk_jfr_module_available(&stream, THREAD);
+}
+
+bool JfrRecorder::on_vm_start() {
+  const bool in_graph = JfrJavaSupport::is_jdk_jfr_module_available();
+  Thread* const thread = Thread::current();
+  if (!JfrOptionSet::initialize(thread)) {
+    return false;
+  }
+  if (!register_jfr_dcmds()) {
+    return false;
+  }
+  if (!initialize_startup_recording(thread)) {
+    return false;
+  }
+  if (in_graph) {
+    if (!JfrJavaEventWriter::initialize()) {
+      return false;
+    }
+    if (!JfrOptionSet::configure(thread)) {
+      return false;
+    }
+  }
+  if (!is_enabled()) {
+    return true;
+  }
+  if (!in_graph) {
+    log_jdk_jfr_module_resolution_error(thread);
+    return false;
+  }
+  return startup_recording(thread);
+}
+
+static bool _created = false;
+
+//
+// Main entry point for starting Jfr functionality.
+// Non-protected initializations assume single-threaded setup.
+//
+bool JfrRecorder::create(bool simulate_failure) {
+  assert(!is_disabled(), "invariant");
+  assert(!is_created(), "invariant");
+  if (!is_enabled()) {
+    enable();
+  }
+  if (!create_components() || simulate_failure) {
+    destroy_components();
+    return false;
+  }
+  if (!create_recorder_thread()) {
+    destroy_components();
+    return false;
+  }
+  _created = true;
+  return true;
+}
+
+bool JfrRecorder::is_created() {
+  return _created;
+}
+
+bool JfrRecorder::create_components() {
+  ResourceMark rm;
+  HandleMark hm;
+
+  if (!create_jvmti_agent()) {
+    return false;
+  }
+  if (!create_post_box()) {
+    return false;
+  }
+  if (!create_chunk_repository()) {
+    return false;
+  }
+  if (!create_storage()) {
+    return false;
+  }
+  if (!create_checkpoint_manager()) {
+    return false;
+  }
+  if (!create_stacktrace_repository()) {
+    return false;
+  }
+  if (!create_os_interface()) {
+    return false;
+  }
+  if (!create_stringpool()) {
+    return false;
+  }
+  if (!create_thread_sampling()) {
+    return false;
+  }
+  return true;
+}
+
+// subsystems
+static JfrJvmtiAgent* _jvmti_agent = NULL;
+static JfrPostBox* _post_box = NULL;
+static JfrStorage* _storage = NULL;
+static JfrCheckpointManager* _checkpoint_manager = NULL;
+static JfrRepository* _repository = NULL;
+static JfrStackTraceRepository* _stack_trace_repository;
+static JfrStringPool* _stringpool = NULL;
+static JfrOSInterface* _os_interface = NULL;
+static JfrThreadSampling* _thread_sampling = NULL;
+
+bool JfrRecorder::create_jvmti_agent() {
+  return JfrOptionSet::allow_retransforms() ? JfrJvmtiAgent::create() : true;
+}
+
+bool JfrRecorder::create_post_box() {
+  assert(_post_box == NULL, "invariant");
+  _post_box = JfrPostBox::create();
+  return _post_box != NULL;
+}
+
+bool JfrRecorder::create_chunk_repository() {
+  assert(_repository == NULL, "invariant");
+  assert(_post_box != NULL, "invariant");
+  _repository = JfrRepository::create(*_post_box);
+  return _repository != NULL && _repository->initialize();
+}
+
+bool JfrRecorder::create_os_interface() {
+  assert(_os_interface == NULL, "invariant");
+  _os_interface = JfrOSInterface::create();
+  return _os_interface != NULL && _os_interface->initialize();
+}
+
+bool JfrRecorder::create_storage() {
+  assert(_repository != NULL, "invariant");
+  assert(_post_box != NULL, "invariant");
+  _storage = JfrStorage::create(_repository->chunkwriter(), *_post_box);
+  return _storage != NULL && _storage->initialize();
+}
+
+bool JfrRecorder::create_checkpoint_manager() {
+  assert(_checkpoint_manager == NULL, "invariant");
+  assert(_repository != NULL, "invariant");
+  _checkpoint_manager = JfrCheckpointManager::create(_repository->chunkwriter());
+  return _checkpoint_manager != NULL && _checkpoint_manager->initialize();
+}
+
+bool JfrRecorder::create_stacktrace_repository() {
+  assert(_stack_trace_repository == NULL, "invariant");
+  _stack_trace_repository = JfrStackTraceRepository::create();
+  return _stack_trace_repository != NULL && _stack_trace_repository->initialize();
+}
+
+bool JfrRecorder::create_stringpool() {
+  assert(_stringpool == NULL, "invariant");
+  assert(_repository != NULL, "invariant");
+  _stringpool = JfrStringPool::create(_repository->chunkwriter());
+  return _stringpool != NULL && _stringpool->initialize();
+}
+
+bool JfrRecorder::create_thread_sampling() {
+  assert(_thread_sampling == NULL, "invariant");
+  _thread_sampling = JfrThreadSampling::create();
+  return _thread_sampling != NULL;
+}
+
+void JfrRecorder::destroy_components() {
+  JfrJvmtiAgent::destroy();
+  if (_post_box != NULL) {
+    JfrPostBox::destroy();
+    _post_box = NULL;
+  }
+  if (_repository != NULL) {
+    JfrRepository::destroy();
+    _repository = NULL;
+  }
+  if (_storage != NULL) {
+    JfrStorage::destroy();
+    _storage = NULL;
+  }
+  if (_checkpoint_manager != NULL) {
+    JfrCheckpointManager::destroy();
+    _checkpoint_manager = NULL;
+  }
+  if (_stack_trace_repository != NULL) {
+    JfrStackTraceRepository::destroy();
+    _stack_trace_repository = NULL;
+  }
+  if (_stringpool != NULL) {
+    JfrStringPool::destroy();
+    _stringpool = NULL;
+  }
+  if (_os_interface != NULL) {
+    JfrOSInterface::destroy();
+    _os_interface = NULL;
+  }
+  if (_thread_sampling != NULL) {
+    JfrThreadSampling::destroy();
+    _thread_sampling = NULL;
+  }
+}
+
+bool JfrRecorder::create_recorder_thread() {
+  return JfrRecorderThread::start(_checkpoint_manager, _post_box, Thread::current());
+}
+
+void JfrRecorder::destroy() {
+  assert(is_created(), "invariant");
+  _post_box->post(MSG_SHUTDOWN);
+  JfrJvmtiAgent::destroy();
+}
+
+void JfrRecorder::on_recorder_thread_exit() {
+  assert(!is_recording(), "invariant");
+  // intent is to destroy the recorder instance and components,
+  // but need sensitive coordination not yet in place
+  //
+  // destroy_components();
+  //
+  log_debug(jfr, system)("Recorder thread STOPPED");
+}
+
+void JfrRecorder::start_recording() {
+  _post_box->post(MSG_START);
+}
+
+bool JfrRecorder::is_recording() {
+  return JfrRecorderService::is_recording();
+}
+
+void JfrRecorder::stop_recording() {
+  _post_box->post(MSG_STOP);
+}