1 /* 2 * Copyright (c) 2012, 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 #ifndef SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP 25 #define SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP 26 27 #include "jfr/recorder/storage/jfrBuffer.hpp" 28 #include "jfr/recorder/storage/jfrMemorySpace.hpp" 29 #include "jfr/recorder/storage/jfrMemorySpaceRetrieval.hpp" 30 31 class JfrChunkWriter; 32 class JfrPostBox; 33 class JfrStorage; 34 class JfrStorageControl; 35 36 typedef JfrMemorySpace<JfrBuffer, JfrMspaceAlternatingRetrieval, JfrStorage> JfrStorageMspace; 37 typedef JfrMemorySpace<JfrAgeNode, JfrMspaceSequentialRetrieval, JfrStorage> JfrStorageAgeMspace; 38 39 // 40 // Responsible for providing backing storage for writing events. 41 // 42 class JfrStorage : public JfrCHeapObj { 43 public: 44 typedef JfrStorageMspace::Type Buffer; 45 private: 46 JfrStorageControl* _control; 47 JfrStorageMspace* _global_mspace; 48 JfrStorageMspace* _thread_local_mspace; 49 JfrStorageMspace* _transient_mspace; 50 JfrStorageAgeMspace* _age_mspace; 51 JfrChunkWriter& _chunkwriter; 52 JfrPostBox& _post_box; 53 54 // mspace callbacks 55 void register_full(Buffer* t, Thread* thread); 56 void lock(); 57 void unlock(); 58 59 Buffer* acquire_large(size_t size, Thread* t); 60 Buffer* acquire_transient(size_t size, Thread* thread); 61 bool flush_regular_buffer(Buffer* const buffer, Thread* t); 62 Buffer* flush_regular(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t); 63 Buffer* flush_large(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t); 64 Buffer* provision_large(Buffer* cur, const u1* cur_pos, size_t used, size_t req, bool native, Thread* t); 65 void release(Buffer* buffer, Thread* t); 66 67 size_t clear(); 68 size_t clear_full(); 69 size_t write(); 70 size_t write_full(); 71 size_t write_at_safepoint(); 72 size_t scavenge(); 73 74 JfrStorage(JfrChunkWriter& cw, JfrPostBox& post_box); 75 ~JfrStorage(); 76 77 static JfrStorage& instance(); 78 static JfrStorage* create(JfrChunkWriter& chunkwriter, JfrPostBox& post_box); 79 bool initialize(); 80 static void destroy(); 81 82 public: 83 static Buffer* acquire_thread_local(Thread* t, size_t size = 0); 84 static void release_thread_local(Buffer* buffer, Thread* t); 85 void release_large(Buffer* const buffer, Thread* t); 86 static Buffer* flush(Buffer* cur, size_t used, size_t req, bool native, Thread* t); 87 void discard_oldest(Thread* t); 88 static JfrStorageControl& control(); 89 90 friend class JfrRecorder; 91 friend class JfrRecorderService; 92 template <typename, template <typename> class, typename> 93 friend class JfrMemorySpace; 94 }; 95 96 #endif // SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGE_HPP