| /* |
| * Copyright (c) 2016, 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/checkpoint/jfrCheckpointManager.hpp" |
| #include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp" |
| #include "jfr/writers/jfrBigEndianWriter.hpp" |
| |
| JfrCheckpointFlush::JfrCheckpointFlush(Type* old, size_t used, size_t requested, Thread* t) : |
| _result(JfrCheckpointManager::flush(old, used, requested, t)) {} |
| |
| JfrCheckpointWriter::JfrCheckpointWriter(bool flushpoint, bool header, Thread* thread) : |
| JfrCheckpointWriterBase(JfrCheckpointManager::lease_buffer(thread), thread), |
| _time(JfrTicks::now()), |
| _offset(0), |
| _count(0), |
| _flushpoint(flushpoint), |
| _header(header) { |
| assert(this->is_acquired(), "invariant"); |
| assert(0 == this->current_offset(), "invariant"); |
| if (_header) { |
| reserve(sizeof(JfrCheckpointEntry)); |
| } |
| } |
| |
| static void write_checkpoint_header(u1* pos, jlong size, jlong time, bool flushpoint, juint type_count) { |
| assert(pos != NULL, "invariant"); |
| JfrBigEndianWriter be_writer(pos, sizeof(JfrCheckpointEntry)); |
| be_writer.write(size); |
| be_writer.write(time); |
| be_writer.write(JfrTicks::now().value() - time); |
| be_writer.write(flushpoint ? (juint)1 : (juint)0); |
| be_writer.write(type_count); |
| assert(be_writer.is_valid(), "invariant"); |
| } |
| |
| JfrCheckpointWriter::~JfrCheckpointWriter() { |
| assert(this->is_acquired(), "invariant"); |
| if (!this->is_valid() || !_header) { |
| release(); |
| return; |
| } |
| if (0 == count()) { |
| assert(this->used_size() == sizeof(JfrCheckpointEntry), "invariant"); |
| this->seek(_offset); |
| release(); |
| return; |
| } |
| assert(_header, "invariant"); |
| assert(this->is_valid(), "invariant"); |
| assert(count() > 0, "invariant"); |
| assert(this->used_size() > sizeof(JfrCheckpointEntry), "invariant"); |
| const jlong size = this->current_offset(); |
| assert(size + this->start_pos() == this->current_pos(), "invariant"); |
| write_checkpoint_header(const_cast<u1*>(this->start_pos()), size, _time, is_flushpoint(), count()); |
| release(); |
| } |
| |
| void JfrCheckpointWriter::set_flushpoint(bool flushpoint) { |
| _flushpoint = flushpoint; |
| } |
| |
| bool JfrCheckpointWriter::is_flushpoint() const { |
| return _flushpoint; |
| } |
| |
| juint JfrCheckpointWriter::count() const { |
| return _count; |
| } |
| |
| void JfrCheckpointWriter::set_count(juint count) { |
| _count = count; |
| } |
| |
| void JfrCheckpointWriter::release() { |
| assert(this->is_acquired(), "invariant"); |
| if (!this->is_valid() || this->used_size() == 0) { |
| return; |
| } |
| assert(this->used_size() > 0, "invariant"); |
| // write through to backing storage |
| this->commit(); |
| assert(0 == this->current_offset(), "invariant"); |
| } |
| |
| void JfrCheckpointWriter::write_type(JfrTypeId type_id) { |
| assert(type_id < TYPES_END, "invariant"); |
| write<u8>(type_id); |
| increment(); |
| } |
| |
| void JfrCheckpointWriter::write_key(u8 key) { |
| write<u8>(key); |
| } |
| |
| void JfrCheckpointWriter::increment() { |
| ++_count; |
| } |
| |
| void JfrCheckpointWriter::write_count(u4 nof_entries) { |
| write<u4>((u4)nof_entries); |
| } |
| |
| void JfrCheckpointWriter::write_count(u4 nof_entries, jlong offset) { |
| write_padded_at_offset(nof_entries, offset); |
| } |
| |
| const u1* JfrCheckpointWriter::session_data(size_t* size, const JfrCheckpointContext* ctx /* 0 */) { |
| assert(this->is_acquired(), "wrong state!"); |
| if (!this->is_valid()) { |
| *size = 0; |
| return NULL; |
| } |
| if (ctx != NULL) { |
| const u1* session_start_pos = this->start_pos() + ctx->offset; |
| *size = this->current_pos() - session_start_pos; |
| return session_start_pos; |
| } |
| *size = this->used_size(); |
| assert(this->start_pos() + *size == this->current_pos(), "invariant"); |
| write_checkpoint_header(const_cast<u1*>(this->start_pos()), this->used_offset(), _time, is_flushpoint(), count()); |
| this->seek(_offset + (_header ? sizeof(JfrCheckpointEntry) : 0)); |
| set_count(0); |
| return this->start_pos(); |
| } |
| |
| const JfrCheckpointContext JfrCheckpointWriter::context() const { |
| JfrCheckpointContext ctx; |
| ctx.offset = this->current_offset(); |
| ctx.count = this->count(); |
| return ctx; |
| } |
| |
| void JfrCheckpointWriter::set_context(const JfrCheckpointContext ctx) { |
| this->seek(ctx.offset); |
| set_count(ctx.count); |
| } |
| bool JfrCheckpointWriter::has_data() const { |
| return this->used_size() > sizeof(JfrCheckpointEntry); |
| } |
| |
| JfrCheckpointBlobHandle JfrCheckpointWriter::checkpoint_blob() { |
| size_t size = 0; |
| const u1* data = session_data(&size); |
| return JfrCheckpointBlob::make(data, size); |
| } |
| |
| JfrCheckpointBlobHandle JfrCheckpointWriter::copy(const JfrCheckpointContext* ctx /* 0 */) { |
| if (ctx == NULL) { |
| return checkpoint_blob(); |
| } |
| size_t size = 0; |
| const u1* data = session_data(&size, ctx); |
| return JfrCheckpointBlob::make(data, size); |
| } |
| |
| JfrCheckpointBlobHandle JfrCheckpointWriter::move(const JfrCheckpointContext* ctx /* 0 */) { |
| JfrCheckpointBlobHandle data = copy(ctx); |
| if (ctx != NULL) { |
| const_cast<JfrCheckpointContext*>(ctx)->count = 0; |
| set_context(*ctx); |
| } |
| return data; |
| } |