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 #include "precompiled.hpp" 26 #include "jfr/recorder/repository/jfrChunkState.hpp" 27 #include "jfr/recorder/repository/jfrChunkWriter.hpp" 28 #include "jfr/recorder/service/jfrOptionSet.hpp" 29 #include "jfr/utilities/jfrTime.hpp" 30 #include "jfr/utilities/jfrTypes.hpp" 31 #include "runtime/mutexLocker.hpp" 32 #include "runtime/os.hpp" 33 #include "runtime/os.inline.hpp" 34 35 const u2 JFR_VERSION_MAJOR = 2; 36 const u2 JFR_VERSION_MINOR = 0; 37 38 static const size_t MAGIC_LEN = 4; 39 static const size_t FILEHEADER_SLOT_SIZE = 8; 40 static const size_t CHUNK_SIZE_OFFSET = 8; 41 42 JfrChunkWriter::JfrChunkWriter() : JfrChunkWriterBase(NULL), _chunkstate(NULL) {} 43 44 bool JfrChunkWriter::initialize() { 45 assert(_chunkstate == NULL, "invariant"); 46 _chunkstate = new JfrChunkState(); 47 return _chunkstate != NULL; 48 } 49 50 static fio_fd open_existing(const char* path) { 51 return os::open(path, O_RDWR, S_IREAD | S_IWRITE); 52 } 53 54 static fio_fd open_chunk(const char* path) { 55 assert(JfrStream_lock->owned_by_self(), "invariant"); 56 return path != NULL ? open_existing(path) : invalid_fd; 57 } 58 59 bool JfrChunkWriter::open() { 60 assert(_chunkstate != NULL, "invariant"); 61 JfrChunkWriterBase::reset(open_chunk(_chunkstate->path())); 62 const bool is_open = this->has_valid_fd(); 63 if (is_open) { 64 this->bytes("FLR", MAGIC_LEN); 65 this->be_write((u2)JFR_VERSION_MAJOR); 66 this->be_write((u2)JFR_VERSION_MINOR); 67 this->reserve(6 * FILEHEADER_SLOT_SIZE); 68 // u8 chunk_size 69 // u8 initial checkpoint offset 70 // u8 metadata section offset 71 // u8 chunk start nanos 72 // u8 chunk duration nanos 73 // u8 chunk start ticks 74 this->be_write(JfrTime::frequency()); 75 // chunk capabilities, CompressedIntegers etc 76 this->be_write((u4)JfrOptionSet::compressed_integers() ? 1 : 0); 77 _chunkstate->reset(); 78 } 79 return is_open; 80 } 81 82 size_t JfrChunkWriter::close(intptr_t metadata_offset) { 83 write_header(metadata_offset); 84 this->flush(); 85 this->close_fd(); 86 return size_written(); 87 } 88 89 void JfrChunkWriter::write_header(intptr_t metadata_offset) { 90 assert(this->is_valid(), "invariant"); 91 // Chunk size 92 this->write_be_at_offset((jlong)size_written(), CHUNK_SIZE_OFFSET); 93 // initial checkpoint event offset 94 this->write_be_at_offset(_chunkstate->previous_checkpoint_offset(), CHUNK_SIZE_OFFSET + (1 * FILEHEADER_SLOT_SIZE)); 95 // metadata event offset 96 this->write_be_at_offset((jlong)metadata_offset, CHUNK_SIZE_OFFSET + (2 * FILEHEADER_SLOT_SIZE)); 97 // start of chunk in nanos since epoch 98 this->write_be_at_offset(_chunkstate->previous_start_nanos(), CHUNK_SIZE_OFFSET + (3 * FILEHEADER_SLOT_SIZE)); 99 // duration of chunk in nanos 100 this->write_be_at_offset(_chunkstate->last_chunk_duration(), CHUNK_SIZE_OFFSET + (4 * FILEHEADER_SLOT_SIZE)); 101 // start of chunk in ticks 102 this->write_be_at_offset(_chunkstate->previous_start_ticks(), CHUNK_SIZE_OFFSET + (5 * FILEHEADER_SLOT_SIZE)); 103 } 104 105 void JfrChunkWriter::set_chunk_path(const char* chunk_path) { 106 _chunkstate->set_path(chunk_path); 107 } 108 109 intptr_t JfrChunkWriter::size_written() const { 110 return this->is_valid() ? this->current_offset() : 0; 111 } 112 113 intptr_t JfrChunkWriter::previous_checkpoint_offset() const { 114 return _chunkstate->previous_checkpoint_offset(); 115 } 116 117 void JfrChunkWriter::set_previous_checkpoint_offset(intptr_t offset) { 118 _chunkstate->set_previous_checkpoint_offset(offset); 119 } 120 121 void JfrChunkWriter::time_stamp_chunk_now() { 122 _chunkstate->update_time_to_now(); 123 }