| /* |
| * Copyright (c) 2012, 2019, 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/jfrChunk.hpp" |
| #include "jfr/recorder/service/jfrOptionSet.hpp" |
| #include "jfr/utilities/jfrTime.hpp" |
| #include "jfr/utilities/jfrTimeConverter.hpp" |
| #include "jfr/utilities/jfrTypes.hpp" |
| #include "runtime/os.inline.hpp" |
| |
| static const char* const MAGIC = "FLR"; |
| static const u2 JFR_VERSION_MAJOR = 2; |
| static const u2 JFR_VERSION_MINOR = 1; |
| |
| // strictly monotone |
| static jlong nanos_now() { |
| static jlong last = 0; |
| const jlong now = os::javaTimeMillis() * JfrTimeConverter::NANOS_PER_MILLISEC; |
| if (now > last) { |
| last = now; |
| } else { |
| ++last; |
| } |
| return last; |
| } |
| |
| static jlong ticks_now() { |
| return JfrTicks::now(); |
| } |
| |
| JfrChunk::JfrChunk() : |
| _path(NULL), |
| _start_ticks(0), |
| _previous_start_ticks(invalid_time), |
| _start_nanos(0), |
| _previous_start_nanos(invalid_time), |
| _last_update_nanos(0), |
| _last_checkpoint_offset(0), |
| _last_metadata_offset(0), |
| _generation(1) {} |
| |
| JfrChunk::~JfrChunk() { |
| reset(); |
| } |
| |
| void JfrChunk::reset() { |
| if (_path != NULL) { |
| JfrCHeapObj::free(_path, strlen(_path) + 1); |
| _path = NULL; |
| } |
| _last_checkpoint_offset = _last_metadata_offset = 0; |
| _generation = 1; |
| } |
| |
| const char* JfrChunk::magic() const { |
| return MAGIC; |
| } |
| |
| u2 JfrChunk::major_version() const { |
| return JFR_VERSION_MAJOR; |
| } |
| |
| u2 JfrChunk::minor_version() const { |
| return JFR_VERSION_MINOR; |
| } |
| |
| u2 JfrChunk::capabilities() const { |
| // chunk capabilities, CompressedIntegers etc |
| static bool compressed_integers = JfrOptionSet::compressed_integers(); |
| return compressed_integers; |
| } |
| |
| int64_t JfrChunk::cpu_frequency() const { |
| static const jlong frequency = JfrTime::frequency(); |
| return frequency; |
| } |
| |
| void JfrChunk::set_last_checkpoint_offset(int64_t offset) { |
| _last_checkpoint_offset = offset; |
| } |
| |
| int64_t JfrChunk::last_checkpoint_offset() const { |
| return _last_checkpoint_offset; |
| } |
| |
| int64_t JfrChunk::start_ticks() const { |
| assert(_start_ticks != 0, "invariant"); |
| return _start_ticks; |
| } |
| |
| int64_t JfrChunk::start_nanos() const { |
| assert(_start_nanos != 0, "invariant"); |
| return _start_nanos; |
| } |
| |
| int64_t JfrChunk::previous_start_ticks() const { |
| assert(_previous_start_ticks != invalid_time, "invariant"); |
| return _previous_start_ticks; |
| } |
| |
| int64_t JfrChunk::previous_start_nanos() const { |
| assert(_previous_start_nanos != invalid_time, "invariant"); |
| return _previous_start_nanos; |
| } |
| |
| void JfrChunk::update_start_ticks() { |
| _start_ticks = ticks_now(); |
| } |
| |
| void JfrChunk::update_start_nanos() { |
| const jlong now = nanos_now(); |
| assert(now > _start_nanos, "invariant"); |
| assert(now > _last_update_nanos, "invariant"); |
| _start_nanos = _last_update_nanos = now; |
| } |
| |
| void JfrChunk::update_current_nanos() { |
| const jlong now = nanos_now(); |
| assert(now > _last_update_nanos, "invariant"); |
| _last_update_nanos = now; |
| } |
| |
| void JfrChunk::save_current_and_update_start_ticks() { |
| _previous_start_ticks = _start_ticks; |
| update_start_ticks(); |
| } |
| |
| void JfrChunk::save_current_and_update_start_nanos() { |
| _previous_start_nanos = _start_nanos; |
| update_start_nanos(); |
| } |
| |
| void JfrChunk::set_time_stamp() { |
| save_current_and_update_start_nanos(); |
| save_current_and_update_start_ticks(); |
| } |
| |
| int64_t JfrChunk::last_chunk_duration() const { |
| assert(_previous_start_nanos != invalid_time, "invariant"); |
| return _start_nanos - _previous_start_nanos; |
| } |
| |
| static char* copy_path(const char* path) { |
| assert(path != NULL, "invariant"); |
| const size_t path_len = strlen(path); |
| char* new_path = JfrCHeapObj::new_array<char>(path_len + 1); |
| strncpy(new_path, path, path_len + 1); |
| return new_path; |
| } |
| |
| void JfrChunk::set_path(const char* path) { |
| if (_path != NULL) { |
| JfrCHeapObj::free(_path, strlen(_path) + 1); |
| _path = NULL; |
| } |
| if (path != NULL) { |
| _path = copy_path(path); |
| } |
| } |
| |
| const char* JfrChunk::path() const { |
| return _path; |
| } |
| |
| bool JfrChunk::is_started() const { |
| return _start_nanos != 0; |
| } |
| |
| bool JfrChunk::is_finished() const { |
| return 0 == _generation; |
| } |
| |
| int64_t JfrChunk::duration() const { |
| assert(_last_update_nanos >= _start_nanos, "invariant"); |
| return _last_update_nanos - _start_nanos; |
| } |
| |
| int64_t JfrChunk::last_metadata_offset() const { |
| return _last_metadata_offset; |
| } |
| |
| void JfrChunk::set_last_metadata_offset(int64_t offset) { |
| assert(offset > _last_metadata_offset, "invariant"); |
| _last_metadata_offset = offset; |
| } |
| |
| bool JfrChunk::has_metadata() const { |
| return 0 != _last_metadata_offset; |
| } |
| |
| u1 JfrChunk::generation() const { |
| assert(_generation > 0, "invariant"); |
| const u1 this_generation = _generation++; |
| if (GUARD == _generation) { |
| _generation = 1; |
| } |
| return this_generation; |
| } |
| |
| u1 JfrChunk::next_generation() const { |
| assert(_generation > 0, "invariant"); |
| const u1 next_gen = _generation; |
| return GUARD == next_gen ? 1 : next_gen; |
| } |