jdk8-mips64-public/hotspot: src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp@db357034b763 (annotated)

src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp@db357034b763 (annotated)

src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp

Tue, 16 Jun 2020 11:03:04 +0800

author: bulasevich
date: Tue, 16 Jun 2020 11:03:04 +0800
changeset 9947: db357034b763
parent 9858: b985cbb00e68
permissions: -rw-r--r--

8217647: JFR: recordings on 32-bit systems unreadable
Reviewed-by: egahlin
Contributed-by: boris.ulasevich@bell-sw.com, markus.gronlund@oracle.com

 /*
  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "jfr/recorder/repository/jfrChunkState.hpp"
 #include "jfr/recorder/repository/jfrChunkWriter.hpp"
 #include "jfr/recorder/service/jfrOptionSet.hpp"
 #include "jfr/utilities/jfrTime.hpp"
 #include "jfr/utilities/jfrTypes.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/os.hpp"
 #include "runtime/os.hpp"
 static const u2 JFR_VERSION_MAJOR = 2;
 static const u2 JFR_VERSION_MINOR = 0;
 static const size_t MAGIC_LEN = 4;
 static const size_t FILEHEADER_SLOT_SIZE = 8;
 static const size_t CHUNK_SIZE_OFFSET = 8;
 JfrChunkWriter::JfrChunkWriter() : JfrChunkWriterBase(NULL), _chunkstate(NULL) {}
 bool JfrChunkWriter::initialize() {
   assert(_chunkstate == NULL, "invariant");
   _chunkstate = new JfrChunkState();
   return _chunkstate != NULL;
 }
 static fio_fd open_existing(const char* path) {
   return os::open(path, O_RDWR, S_IREAD | S_IWRITE);
 }
 static fio_fd open_chunk(const char* path) {
   assert(JfrStream_lock->owned_by_self(), "invariant");
   return path != NULL ? open_existing(path) : invalid_fd;
 }
 bool JfrChunkWriter::open() {
   assert(_chunkstate != NULL, "invariant");
   JfrChunkWriterBase::reset(open_chunk(_chunkstate->path()));
   const bool is_open = this->has_valid_fd();
   if (is_open) {
     this->bytes("FLR", MAGIC_LEN);
     this->be_write((u2)JFR_VERSION_MAJOR);
     this->be_write((u2)JFR_VERSION_MINOR);
     this->reserve(6 * FILEHEADER_SLOT_SIZE);
     // u8 chunk_size
     // u8 initial checkpoint offset
     // u8 metadata section offset
     // u8 chunk start nanos
     // u8 chunk duration nanos
     // u8 chunk start ticks
     this->be_write(JfrTime::frequency());
     // chunk capabilities, CompressedIntegers etc
     this->be_write((u4)JfrOptionSet::compressed_integers() ? 1 : 0);
     _chunkstate->reset();
   }
   return is_open;
 }
 size_t JfrChunkWriter::close(int64_t metadata_offset) {
   write_header(metadata_offset);
   this->flush();
   this->close_fd();
   return (size_t)size_written();
 }
 void JfrChunkWriter::write_header(int64_t metadata_offset) {
   assert(this->is_valid(), "invariant");
   // Chunk size
   this->write_be_at_offset((jlong)size_written(), CHUNK_SIZE_OFFSET);
   // initial checkpoint event offset
   this->write_be_at_offset(_chunkstate->previous_checkpoint_offset(), CHUNK_SIZE_OFFSET + (1 * FILEHEADER_SLOT_SIZE));
   // metadata event offset
   this->write_be_at_offset((jlong)metadata_offset, CHUNK_SIZE_OFFSET + (2 * FILEHEADER_SLOT_SIZE));
   // start of chunk in nanos since epoch
   this->write_be_at_offset(_chunkstate->previous_start_nanos(), CHUNK_SIZE_OFFSET + (3 * FILEHEADER_SLOT_SIZE));
   // duration of chunk in nanos
   this->write_be_at_offset(_chunkstate->last_chunk_duration(), CHUNK_SIZE_OFFSET + (4 * FILEHEADER_SLOT_SIZE));
   // start of chunk in ticks
   this->write_be_at_offset(_chunkstate->previous_start_ticks(), CHUNK_SIZE_OFFSET + (5 * FILEHEADER_SLOT_SIZE));
 }
 void JfrChunkWriter::set_chunk_path(const char* chunk_path) {
   _chunkstate->set_path(chunk_path);
 }
 int64_t JfrChunkWriter::size_written() const {
   return this->is_valid() ? this->current_offset() : 0;
 }
 int64_t JfrChunkWriter::previous_checkpoint_offset() const {
   return _chunkstate->previous_checkpoint_offset();
 }
 void JfrChunkWriter::set_previous_checkpoint_offset(int64_t offset) {
   _chunkstate->set_previous_checkpoint_offset(offset);
 }
 void JfrChunkWriter::time_stamp_chunk_now() {
   _chunkstate->update_time_to_now();
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp@db357034b763 (annotated)

src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp