1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp Mon Aug 12 18:30:40 2019 +0300
1.3 @@ -0,0 +1,123 @@
1.4 +/*
1.5 + * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "jfr/recorder/repository/jfrChunkState.hpp"
1.30 +#include "jfr/recorder/repository/jfrChunkWriter.hpp"
1.31 +#include "jfr/recorder/service/jfrOptionSet.hpp"
1.32 +#include "jfr/utilities/jfrTime.hpp"
1.33 +#include "jfr/utilities/jfrTypes.hpp"
1.34 +#include "runtime/mutexLocker.hpp"
1.35 +#include "runtime/os.hpp"
1.36 +#include "runtime/os.hpp"
1.37 +
1.38 +const u2 JFR_VERSION_MAJOR = 2;
1.39 +const u2 JFR_VERSION_MINOR = 0;
1.40 +
1.41 +static const size_t MAGIC_LEN = 4;
1.42 +static const size_t FILEHEADER_SLOT_SIZE = 8;
1.43 +static const size_t CHUNK_SIZE_OFFSET = 8;
1.44 +
1.45 +JfrChunkWriter::JfrChunkWriter() : JfrChunkWriterBase(NULL), _chunkstate(NULL) {}
1.46 +
1.47 +bool JfrChunkWriter::initialize() {
1.48 + assert(_chunkstate == NULL, "invariant");
1.49 + _chunkstate = new JfrChunkState();
1.50 + return _chunkstate != NULL;
1.51 +}
1.52 +
1.53 +static fio_fd open_existing(const char* path) {
1.54 + return os::open(path, O_RDWR, S_IREAD | S_IWRITE);
1.55 +}
1.56 +
1.57 +static fio_fd open_chunk(const char* path) {
1.58 + assert(JfrStream_lock->owned_by_self(), "invariant");
1.59 + return path != NULL ? open_existing(path) : invalid_fd;
1.60 +}
1.61 +
1.62 +bool JfrChunkWriter::open() {
1.63 + assert(_chunkstate != NULL, "invariant");
1.64 + JfrChunkWriterBase::reset(open_chunk(_chunkstate->path()));
1.65 + const bool is_open = this->has_valid_fd();
1.66 + if (is_open) {
1.67 + this->bytes("FLR", MAGIC_LEN);
1.68 + this->be_write((u2)JFR_VERSION_MAJOR);
1.69 + this->be_write((u2)JFR_VERSION_MINOR);
1.70 + this->reserve(6 * FILEHEADER_SLOT_SIZE);
1.71 + // u8 chunk_size
1.72 + // u8 initial checkpoint offset
1.73 + // u8 metadata section offset
1.74 + // u8 chunk start nanos
1.75 + // u8 chunk duration nanos
1.76 + // u8 chunk start ticks
1.77 + this->be_write(JfrTime::frequency());
1.78 + // chunk capabilities, CompressedIntegers etc
1.79 + this->be_write((u4)JfrOptionSet::compressed_integers() ? 1 : 0);
1.80 + _chunkstate->reset();
1.81 + }
1.82 + return is_open;
1.83 +}
1.84 +
1.85 +size_t JfrChunkWriter::close(intptr_t metadata_offset) {
1.86 + write_header(metadata_offset);
1.87 + this->flush();
1.88 + this->close_fd();
1.89 + return size_written();
1.90 +}
1.91 +
1.92 +void JfrChunkWriter::write_header(intptr_t metadata_offset) {
1.93 + assert(this->is_valid(), "invariant");
1.94 + // Chunk size
1.95 + this->write_be_at_offset((jlong)size_written(), CHUNK_SIZE_OFFSET);
1.96 + // initial checkpoint event offset
1.97 + this->write_be_at_offset(_chunkstate->previous_checkpoint_offset(), CHUNK_SIZE_OFFSET + (1 * FILEHEADER_SLOT_SIZE));
1.98 + // metadata event offset
1.99 + this->write_be_at_offset((jlong)metadata_offset, CHUNK_SIZE_OFFSET + (2 * FILEHEADER_SLOT_SIZE));
1.100 + // start of chunk in nanos since epoch
1.101 + this->write_be_at_offset(_chunkstate->previous_start_nanos(), CHUNK_SIZE_OFFSET + (3 * FILEHEADER_SLOT_SIZE));
1.102 + // duration of chunk in nanos
1.103 + this->write_be_at_offset(_chunkstate->last_chunk_duration(), CHUNK_SIZE_OFFSET + (4 * FILEHEADER_SLOT_SIZE));
1.104 + // start of chunk in ticks
1.105 + this->write_be_at_offset(_chunkstate->previous_start_ticks(), CHUNK_SIZE_OFFSET + (5 * FILEHEADER_SLOT_SIZE));
1.106 +}
1.107 +
1.108 +void JfrChunkWriter::set_chunk_path(const char* chunk_path) {
1.109 + _chunkstate->set_path(chunk_path);
1.110 +}
1.111 +
1.112 +intptr_t JfrChunkWriter::size_written() const {
1.113 + return this->is_valid() ? this->current_offset() : 0;
1.114 +}
1.115 +
1.116 +intptr_t JfrChunkWriter::previous_checkpoint_offset() const {
1.117 + return _chunkstate->previous_checkpoint_offset();
1.118 +}
1.119 +
1.120 +void JfrChunkWriter::set_previous_checkpoint_offset(intptr_t offset) {
1.121 + _chunkstate->set_previous_checkpoint_offset(offset);
1.122 +}
1.123 +
1.124 +void JfrChunkWriter::time_stamp_chunk_now() {
1.125 + _chunkstate->update_time_to_now();
1.126 +}
