1 /*

     2  * Copyright (c) 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_JFR_HPP

    26 #define SHARE_VM_JFR_JFR_HPP

    27 

    28 #include "jni.h"

    29 #include "memory/allocation.hpp"

    30 

    31 class BoolObjectClosure;

    32 class JavaThread;

    33 class OopClosure;

    34 class Thread;

    35 

    36 extern "C" void JNICALL jfr_register_natives(JNIEnv*, jclass);

    37 

    38 //

    39 // The VM interface to Flight Recorder.

    40 //

    41 class Jfr : AllStatic {

    42  public:

    43   static bool is_enabled();

    44   static bool is_disabled();

    45   static bool is_recording();

    46   static void on_vm_init();

    47   static void on_vm_start();

    48   static void on_unloading_classes();

    49   static void on_thread_exit(JavaThread* thread);

    50   static void on_thread_destruct(Thread* thread);

    51   static void on_vm_shutdown(bool exception_handler = false);

    52   static bool on_start_flight_recording_option(const JavaVMOption** option, char* tail);

    53   static bool on_flight_recorder_option(const JavaVMOption** option, char* tail);

    54   static void weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f);

    55   static Thread* sampler_thread();

    56 };

    57 

    58 #endif // SHARE_VM_JFR_JFR_HPP