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