jdk8-mips64-public/hotspot: src/share/vm/services/classLoadingService.hpp@37f87013dfd8

6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr

     1 /*

     2  * Copyright 2003-2005 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 class instanceKlass;

    27 // VM monitoring and management support for the Class Loading subsystem

    28 class ClassLoadingService : public AllStatic {

    29 private:

    30   // Counters for classes loaded from class files

    31   static PerfCounter*  _classes_loaded_count;

    32   static PerfCounter*  _classes_unloaded_count;

    33   static PerfCounter*  _classbytes_loaded;

    34   static PerfCounter*  _classbytes_unloaded;

    36   // Counters for classes loaded from shared archive

    37   static PerfCounter*  _shared_classes_loaded_count;

    38   static PerfCounter*  _shared_classes_unloaded_count;

    39   static PerfCounter*  _shared_classbytes_loaded;

    40   static PerfCounter*  _shared_classbytes_unloaded;

    42   static PerfVariable* _class_methods_size;

    44   static size_t compute_class_size(instanceKlass* k);

    46 public:

    47   static void init();

    49   static bool get_verbose() { return TraceClassLoading; }

    50   static bool set_verbose(bool verbose);

    51   static void reset_trace_class_unloading();

    53   static jlong loaded_class_count() {

    54     return _classes_loaded_count->get_value() + _shared_classes_loaded_count->get_value();

    55   }

    56   static jlong unloaded_class_count() {

    57     return _classes_unloaded_count->get_value() + _shared_classes_unloaded_count->get_value();

    58   }

    59   static jlong loaded_class_bytes() {

    60     if (UsePerfData) {

    61       return _classbytes_loaded->get_value() + _shared_classbytes_loaded->get_value();

    62     } else {

    63       return -1;

    64     }

    65   }

    66   static jlong unloaded_class_bytes() {

    67     if (UsePerfData) {

    68       return _classbytes_unloaded->get_value() + _shared_classbytes_unloaded->get_value();

    69     } else {

    70       return -1;

    71     }

    72   }

    74   static jlong loaded_shared_class_count() {

    75     return _shared_classes_loaded_count->get_value();

    76   }

    77   static jlong unloaded_shared_class_count() {

    78     return _shared_classes_unloaded_count->get_value();

    79   }

    80   static jlong loaded_shared_class_bytes() {

    81     if (UsePerfData) {

    82       return _shared_classbytes_loaded->get_value();

    83     } else {

    84       return -1;

    85     }

    86   }

    87   static jlong unloaded_shared_class_bytes() {

    88     if (UsePerfData) {

    89       return _shared_classbytes_unloaded->get_value();

    90     } else {

    91       return -1;

    92     }

    93   }

    94   static jlong class_method_data_size() {

    95     return (UsePerfData ? _class_methods_size->get_value() : -1);

    96   }

    98   static void notify_class_loaded(instanceKlass* k, bool shared_class);

    99   // All unloaded classes are non-shared

   100   static void notify_class_unloaded(instanceKlass* k);

   101   static void add_class_method_size(int size) {

   102     if (UsePerfData) {

   103       _class_methods_size->inc(size);

   104     }

   105   }

   106 };

   108 // FIXME: make this piece of code to be shared by M&M and JVMTI

   109 class LoadedClassesEnumerator : public StackObj {

   110 private:

   111   static GrowableArray<KlassHandle>* _loaded_classes;

   112   // _current_thread is for creating a KlassHandle with a faster version constructor

   113   static Thread*                     _current_thread;

   115   GrowableArray<KlassHandle>* _klass_handle_array;

   117 public:

   118   LoadedClassesEnumerator(Thread* cur_thread);

   120   int num_loaded_classes()         { return _klass_handle_array->length(); }

   121   KlassHandle get_klass(int index) { return _klass_handle_array->at(index); }

   123   static void add_loaded_class(klassOop k) {

   124     // FIXME: For now - don't include array klasses

   125     // The spec is unclear at this point to count array klasses or not

   126     // and also indirect creation of array of super class and secondaries

   127     //

   128     // for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) {

   129     //  KlassHandle h(_current_thread, l);

   130     //  _loaded_classes->append(h);

   131     // }

   132     KlassHandle h(_current_thread, k);

   133     _loaded_classes->append(h);

   134   }

   135 };

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

src/share/vm/services/classLoadingService.hpp@37f87013dfd8

src/share/vm/services/classLoadingService.hpp