1 /*
   2  * Copyright (c) 2012, 2019, 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 #ifndef SHARE_VM_JFR_RECORDER_ACCESS_JFRBACKEND_HPP
  25 #define SHARE_VM_JFR_RECORDER_ACCESS_JFRBACKEND_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 #include "jfr/utilities/jfrTraceTime.hpp"
  29 #include "tracefiles/traceEventIds.hpp"
  30 
  31 // trace macro targets
  32 
  33 class JfrBackend {
  34  public:
  35   static void on_javathread_exit(JavaThread *thread);
  36   static void on_thread_destruct(Thread* thread);
  37   static void on_javathread_suspend(JavaThread* thread);
  38   static void on_unloading_classes();
  39   static bool enabled();
  40   static bool is_event_enabled(TraceEventId event_id);
  41   static bool is_stacktrace_enabled(TraceEventId event_id);
  42   static jlong threshold(TraceEventId event_id);
  43   static JfrTraceTime time();
  44 };
  45 
  46 #endif // SHARE_VM_JFR_RECORDER_ACCESS_JFRBACKEND_HPP