1 /*

     2  * Copyright (c) 2012, 2019, 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/dcmd/jfrDcmds.hpp"

    27 #include "jfr/recorder/jfrRecorder.hpp"

    28 #include "jfr/recorder/repository/jfrChunkState.hpp"

    29 #include "jfr/recorder/repository/jfrChunkWriter.hpp"

    30 #include "jfr/utilities/jfrTime.hpp"

    31 #include "jfr/utilities/jfrTimeConverter.hpp"

    32 #include "logging/log.hpp"

    33 #include "runtime/os.inline.hpp"

    34 #include "runtime/thread.inline.hpp"

    35 

    36 JfrChunkState::JfrChunkState() :

    37   _path(NULL),

    38   _start_ticks(0),

    39   _start_nanos(0),

    40   _previous_start_ticks(0),

    41   _previous_start_nanos(0),

    42   _last_checkpoint_offset(0) {}

    43 

    44 JfrChunkState::~JfrChunkState() {

    45   reset();

    46 }

    47 

    48 void JfrChunkState::reset() {

    49   if (_path != NULL) {

    50     JfrCHeapObj::free(_path, strlen(_path) + 1);

    51     _path = NULL;

    52   }

    53   set_last_checkpoint_offset(0);

    54 }

    55 

    56 void JfrChunkState::set_last_checkpoint_offset(int64_t offset) {

    57   _last_checkpoint_offset = offset;

    58 }

    59 

    60 int64_t JfrChunkState::last_checkpoint_offset() const {

    61   return _last_checkpoint_offset;

    62 }

    63 

    64 int64_t JfrChunkState::previous_start_ticks() const {

    65   return _previous_start_ticks;

    66 }

    67 

    68 int64_t JfrChunkState::previous_start_nanos() const {

    69   return _previous_start_nanos;

    70 }

    71 

    72 void JfrChunkState::update_start_ticks() {

    73   _start_ticks = JfrTicks::now();

    74 }

    75 

    76 void JfrChunkState::update_start_nanos() {

    77   _start_nanos = os::javaTimeMillis() * JfrTimeConverter::NANOS_PER_MILLISEC;

    78 }

    79 

    80 void JfrChunkState::save_current_and_update_start_ticks() {

    81   _previous_start_ticks = _start_ticks;

    82   update_start_ticks();

    83 }

    84 

    85 void JfrChunkState::save_current_and_update_start_nanos() {

    86   _previous_start_nanos = _start_nanos;

    87   update_start_nanos();

    88 }

    89 

    90 void JfrChunkState::update_time_to_now() {

    91   save_current_and_update_start_nanos();

    92   save_current_and_update_start_ticks();

    93 }

    94 

    95 int64_t JfrChunkState::last_chunk_duration() const {

    96   return _start_nanos - _previous_start_nanos;

    97 }

    98 

    99 static char* copy_path(const char* path) {

   100   assert(path != NULL, "invariant");

   101   const size_t path_len = strlen(path);

   102   char* new_path = JfrCHeapObj::new_array<char>(path_len + 1);

   103   strncpy(new_path, path, path_len + 1);

   104   return new_path;

   105 }

   106 

   107 void JfrChunkState::set_path(const char* path) {

   108   assert(JfrStream_lock->owned_by_self(), "invariant");

   109   if (_path != NULL) {

   110     JfrCHeapObj::free(_path, strlen(_path) + 1);

   111     _path = NULL;

   112   }

   113   if (path != NULL) {

   114     _path = copy_path(path);

   115   }

   116 }

   117 

   118 const char* JfrChunkState::path() const {

   119   return _path;

   120 }