1 /*
   2  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_JFR_RECORDER_JFRRECORDER_HPP
  26 #define SHARE_VM_JFR_RECORDER_JFRRECORDER_HPP
  27 
  28 #include "jfr/utilities/jfrAllocation.hpp"
  29 
  30 class JavaThread;
  31 class Thread;
  32 
  33 //
  34 // Represents the singleton instance of Flight Recorder.
  35 // Lifecycle management of recorder components.
  36 //
  37 class JfrRecorder : public JfrCHeapObj {
  38   friend class Jfr;
  39   friend void recorderthread_entry(JavaThread*, Thread*);
  40  private:
  41   static bool _shutting_down;
  42 
  43   static bool create_checkpoint_manager();
  44   static bool create_chunk_repository();
  45   static bool create_java_event_writer();
  46   static bool create_jvmti_agent();
  47   static bool create_os_interface();
  48   static bool create_post_box();
  49   static bool create_recorder_thread();
  50   static bool create_stacktrace_repository();
  51   static bool create_storage();
  52   static bool create_stringpool();
  53   static bool create_thread_sampling();
  54   static bool create_components();
  55   static void destroy_components();
  56   static void on_recorder_thread_exit();
  57   static bool on_vm_start();
  58   static bool on_vm_init();
  59 
  60  public:
  61   static bool is_enabled();
  62   static bool is_disabled();
  63   static bool create(bool simulate_failure);
  64   static bool is_created();
  65   static void destroy();
  66   static void start_recording();
  67   static bool is_recording();
  68   static void stop_recording();
  69   static bool is_shutting_down() { return _shutting_down; }
  70   static void set_is_shutting_down() { _shutting_down = true; }
  71 };
  72 
  73 #endif // SHARE_VM_JFR_RECORDER_JFRRECORDER_HPP