jdk8-mips64-public/hotspot: src/share/vm/jfr/recorder/repository/jfrRepository.hpp@b985cbb00e68

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  */

    24 #ifndef SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP

    25 #define SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP

    27 #include "jni.h"

    28 #include "jfr/utilities/jfrAllocation.hpp"

    30 class JfrChunkWriter;

    31 class JfrPostBox;

    33 //

    34 // Represents the location on disk where internal files, "chunks", are stored.

    35 //

    36 // A "chunk" is a self-contained file artifact storing events and metadata that

    37 // has been moved out of process memory.

    38 //

    39 // Chunk files are associated with recordings and are managed at a higher level in Java.

    40 // Java continously keeps the VM informed about new chunk locations via set_chunk_path().

    41 //

    42 // A JfrChunkWriter will open the next chunk file which it maintains as the current chunk.

    43 // There is a rotation scheme in place for creating new chunks at certain intervals.

    44 //

    45 class JfrRepository : public JfrCHeapObj {

    46   friend class JfrRecorder;

    47   friend class JfrRecorderService;

    48  private:

    49   char* _path;

    50   JfrPostBox& _post_box;

    52   JfrRepository(JfrPostBox& post_box);

    53   ~JfrRepository();

    55   bool set_path(const char* path);

    56   void set_chunk_path(const char* path);

    57   bool open_chunk(bool vm_error = false);

    58   size_t close_chunk(jlong metadata_offset);

    59   void on_vm_error();

    60   static void notify_on_new_chunk_path();

    61   static JfrChunkWriter& chunkwriter();

    63   static JfrRepository& instance();

    64   static JfrRepository* create(JfrPostBox& post_box);

    65   bool initialize();

    66   static void destroy();

    68  public:

    69   static void set_path(jstring location, JavaThread* jt);

    70   static void set_chunk_path(jstring path, JavaThread* jt);

    71 };

    73 #endif // SHARE_VM_JFR_RECORDER_REPOSITORY_JFRREPOSITORY_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/jfr/recorder/repository/jfrRepository.hpp@b985cbb00e68

src/share/vm/jfr/recorder/repository/jfrRepository.hpp