1 /* 2 * Copyright (c) 2017, 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 #include "precompiled.hpp" 26 #include "jfr/recorder/checkpoint/jfrCheckpointBlob.hpp" 27 #include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp" 28 29 JfrCheckpointBlob::JfrCheckpointBlob(const u1* checkpoint, size_t size) : 30 _checkpoint(JfrCHeapObj::new_array<u1>(size)), 31 _size(size), 32 _next(), 33 _written(false) { 34 assert(checkpoint != NULL, "invariant"); 35 assert(_checkpoint != NULL, "invariant"); 36 memcpy(const_cast<u1*>(_checkpoint), checkpoint, size); 37 } 38 39 JfrCheckpointBlob::~JfrCheckpointBlob() { 40 JfrCHeapObj::free(const_cast<u1*>(_checkpoint), _size); 41 } 42 43 const JfrCheckpointBlobHandle& JfrCheckpointBlob::next() const { 44 return _next; 45 } 46 47 void JfrCheckpointBlob::write_this(JfrCheckpointWriter& writer) const { 48 writer.bytes(_checkpoint, _size); 49 } 50 51 void JfrCheckpointBlob::exclusive_write(JfrCheckpointWriter& writer) const { 52 if (!_written) { 53 write_this(writer); 54 _written = true; 55 } 56 if (_next.valid()) { 57 _next->exclusive_write(writer); 58 } 59 } 60 61 void JfrCheckpointBlob::write(JfrCheckpointWriter& writer) const { 62 write_this(writer); 63 if (_next.valid()) { 64 _next->write(writer); 65 } 66 } 67 68 void JfrCheckpointBlob::reset_write_state() const { 69 if (_written) { 70 _written = false; 71 } 72 if (_next.valid()) { 73 _next->reset_write_state(); 74 } 75 } 76 77 void JfrCheckpointBlob::set_next(const JfrCheckpointBlobHandle& ref) { 78 if (_next == ref) { 79 return; 80 } 81 assert(_next != ref, "invariant"); 82 if (_next.valid()) { 83 _next->set_next(ref); 84 return; 85 } 86 _next = ref; 87 } 88 89 JfrCheckpointBlobHandle JfrCheckpointBlob::make(const u1* checkpoint, size_t size) { 90 const JfrCheckpointBlob* cp_blob = new JfrCheckpointBlob(checkpoint, size); 91 assert(cp_blob != NULL, "invariant"); 92 return JfrCheckpointBlobReference::make(cp_blob); 93 }