1 /*
 2  * Copyright (c) 2018, 2021, 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_JFR_JFR_HPP
26 #define SHARE_JFR_JFR_HPP
27 
28 #include "jni.h"
29 #include "memory/allocation.hpp"
30 
31 class JavaThread;
32 class Thread;
33 class Klass;
34 
35 extern "C" void JNICALL jfr_register_natives(JNIEnv*, jclass);
36 
37 //
38 // The VM interface to Flight Recorder.
39 //
40 class Jfr : AllStatic {
41  public:
42   static bool is_enabled();
43   static bool is_disabled();
44   static bool is_recording();
45   static void on_create_vm_1();
46   static void on_create_vm_2();
47   static void on_create_vm_3();
48   static void on_unloading_classes();
49   static void on_thread_start(Thread* thread);
50   static void on_thread_exit(Thread* thread);
51   static void on_vm_shutdown(bool exception_handler = false);
52   static bool on_flight_recorder_option(const JavaVMOption** option, char* delimiter);
53   static bool on_start_flight_recording_option(const JavaVMOption** option, char* delimiter);
54   static void on_vm_error_report(outputStream* st);
55   static void exclude_thread(Thread* thread);
56   static bool is_excluded(Thread* thread);
57   static void include_thread(Thread* thread);
58 
59   // intrinsic support
60   static void get_class_id_intrinsic(const Klass* klass);
61   static address epoch_address();
62   static address signal_address();
63 };
64 
65 #endif // SHARE_JFR_JFR_HPP