--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkWriter.cpp Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,122 @@
+/*
+ * 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"
+
+const u2 JFR_VERSION_MAJOR = 2;
+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(intptr_t metadata_offset) {
+ write_header(metadata_offset);
+ this->flush();
+ this->close_fd();
+ return size_written();
+}
+
+void JfrChunkWriter::write_header(intptr_t metadata_offset) {
+ assert(this->is_valid(), "invariant");
+ // Chunk size
+ this->write_be_at_offset(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(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);
+}
+
+intptr_t JfrChunkWriter::size_written() const {
+ return this->is_valid() ? this->current_offset() : 0;
+}
+
+intptr_t JfrChunkWriter::previous_checkpoint_offset() const {
+ return _chunkstate->previous_checkpoint_offset();
+}
+
+void JfrChunkWriter::set_previous_checkpoint_offset(intptr_t offset) {
+ _chunkstate->set_previous_checkpoint_offset(offset);
+}
+
+void JfrChunkWriter::time_stamp_chunk_now() {
+ _chunkstate->update_time_to_now();
+}