1 /* 2 * Copyright (c) 2016, 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 25 #ifndef SHARE_VM_JFR_RECORDER_CHECKPOINT_CONSTANT_JFRTHREADGROUP_HPP 26 #define SHARE_VM_JFR_RECORDER_CHECKPOINT_CONSTANT_JFRTHREADGROUP_HPP 27 28 #include "jni.h" 29 #include "jfr/utilities/jfrAllocation.hpp" 30 #include "jfr/utilities/jfrTypes.hpp" 31 32 class JfrCheckpointWriter; 33 template <typename> 34 class GrowableArray; 35 class JfrThreadGroupsHelper; 36 class JfrThreadGroupPointers; 37 38 class JfrThreadGroup : public JfrCHeapObj { 39 friend class JfrCheckpointThreadClosure; 40 private: 41 static JfrThreadGroup* _instance; 42 class JfrThreadGroupEntry; 43 GrowableArray<JfrThreadGroupEntry*>* _list; 44 45 JfrThreadGroup(); 46 JfrThreadGroupEntry* find_entry(const JfrThreadGroupPointers& ptrs) const; 47 JfrThreadGroupEntry* new_entry(JfrThreadGroupPointers& ptrs); 48 int add_entry(JfrThreadGroupEntry* const tge); 49 50 void write_thread_group_entries(JfrCheckpointWriter& writer) const; 51 void write_selective_thread_group(JfrCheckpointWriter* writer, traceid thread_group_id) const; 52 53 static traceid thread_group_id_internal(JfrThreadGroupsHelper& helper); 54 static JfrThreadGroup* instance(); 55 static void set_instance(JfrThreadGroup* new_instance); 56 57 public: 58 ~JfrThreadGroup(); 59 static traceid thread_group_id(JavaThread* thread); 60 static void write(JfrCheckpointWriter* w, traceid thread_group_id); 61 static traceid thread_group_id(const JavaThread* thread, Thread* current); 62 static void write(JfrCheckpointWriter& w); 63 }; 64 65 #endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_CONSTANT_JFRTHREADGROUP_HPP