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src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp@b985cbb00e68
src/share/vm/jfr/recorder/repository/jfrChunkWriter.cpp
Mon, 12 Aug 2019 18:30:40 +0300
- author
- apetushkov
- date
- Mon, 12 Aug 2019 18:30:40 +0300
- changeset 9858
- b985cbb00e68
- child 9947
- db357034b763
- permissions
- -rw-r--r--
8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens
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 */
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"
35 const u2 JFR_VERSION_MAJOR = 2;
36 const u2 JFR_VERSION_MINOR = 0;
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;
42 JfrChunkWriter::JfrChunkWriter() : JfrChunkWriterBase(NULL), _chunkstate(NULL) {}
44 bool JfrChunkWriter::initialize() {
45 assert(_chunkstate == NULL, "invariant");
46 _chunkstate = new JfrChunkState();
47 return _chunkstate != NULL;
48 }
50 static fio_fd open_existing(const char* path) {
51 return os::open(path, O_RDWR, S_IREAD | S_IWRITE);
52 }
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 }
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 }
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 }
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 }
105 void JfrChunkWriter::set_chunk_path(const char* chunk_path) {
106 _chunkstate->set_path(chunk_path);
107 }
109 intptr_t JfrChunkWriter::size_written() const {
110 return this->is_valid() ? this->current_offset() : 0;
111 }
113 intptr_t JfrChunkWriter::previous_checkpoint_offset() const {
114 return _chunkstate->previous_checkpoint_offset();
115 }
117 void JfrChunkWriter::set_previous_checkpoint_offset(intptr_t offset) {
118 _chunkstate->set_previous_checkpoint_offset(offset);
119 }
121 void JfrChunkWriter::time_stamp_chunk_now() {
122 _chunkstate->update_time_to_now();
123 }
