Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp
src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp
- changeset 9858
- b985cbb00e68
- child 9947
- db357034b763
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| 9727:c7a3e57fdf4a | 9858:b985cbb00e68 |
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| 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.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 } |
