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_start(Thread* thread); 50 static void on_thread_exit(Thread* thread); 51 static void on_java_thread_dismantle(JavaThread* jt); 52 static void on_vm_shutdown(bool exception_handler = false); 53 static bool on_flight_recorder_option(const JavaVMOption** option, char* delimiter); 54 static bool on_start_flight_recording_option(const JavaVMOption** option, char* delimiter); 55 static void weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f); 56 static void weak_oops_do(OopClosure* f); 57 static Thread* sampler_thread(); 58 }; 59 60 #endif // SHARE_VM_JFR_JFR_HPP 61