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_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP 26 #define SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP 27 28 #include "jfr/utilities/jfrAllocation.hpp" 29 30 class JavaThread; 31 class JfrStackFrame; 32 class JfrThreadSampler; 33 class Thread; 34 35 class JfrThreadSampling : public JfrCHeapObj { 36 friend class JfrRecorder; 37 private: 38 JfrThreadSampler* _sampler; 39 void start_sampler(size_t interval_java, size_t interval_native); 40 void set_sampling_interval(bool java_interval, size_t period); 41 42 JfrThreadSampling(); 43 ~JfrThreadSampling(); 44 45 static JfrThreadSampling& instance(); 46 static JfrThreadSampling* create(); 47 static void destroy(); 48 49 public: 50 static void set_java_sample_interval(size_t period); 51 static void set_native_sample_interval(size_t period); 52 static void on_javathread_suspend(JavaThread* thread); 53 static Thread* sampler_thread(); 54 }; 55 56 #endif // SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP