1 /*
   2  * Copyright (c) 2003, 2013, 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 #ifndef SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP
  26 #define SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP
  27 

  28 #include "runtime/handles.hpp"
  29 #include "runtime/perfData.hpp"
  30 #include "utilities/growableArray.hpp"
  31 #include "utilities/macros.hpp"
  32 
  33 class InstanceKlass;
  34 
  35 // VM monitoring and management support for the Class Loading subsystem
  36 class ClassLoadingService : public AllStatic {
  37 private:
  38   // Counters for classes loaded from class files
  39   static PerfCounter*  _classes_loaded_count;
  40   static PerfCounter*  _classes_unloaded_count;
  41   static PerfCounter*  _classbytes_loaded;
  42   static PerfCounter*  _classbytes_unloaded;
  43 
  44   // Counters for classes loaded from shared archive
  45   static PerfCounter*  _shared_classes_loaded_count;
  46   static PerfCounter*  _shared_classes_unloaded_count;
  47   static PerfCounter*  _shared_classbytes_loaded;
  48   static PerfCounter*  _shared_classbytes_unloaded;
  49 
  50   static PerfVariable* _class_methods_size;
  51 
  52   static size_t compute_class_size(InstanceKlass* k);
  53 
  54 public:
  55   static void init();
  56 
  57   static bool get_verbose() { return TraceClassLoading; }
  58   static bool set_verbose(bool verbose);
  59   static void reset_trace_class_unloading() NOT_MANAGEMENT_RETURN;
  60 
  61   static jlong loaded_class_count() {
  62     return _classes_loaded_count->get_value() + _shared_classes_loaded_count->get_value();
  63   }
  64   static jlong unloaded_class_count() {
  65     return _classes_unloaded_count->get_value() + _shared_classes_unloaded_count->get_value();
  66   }
  67   static jlong loaded_class_bytes() {
  68     if (UsePerfData) {
  69       return _classbytes_loaded->get_value() + _shared_classbytes_loaded->get_value();
  70     } else {
  71       return -1;
  72     }
  73   }
  74   static jlong unloaded_class_bytes() {
  75     if (UsePerfData) {
  76       return _classbytes_unloaded->get_value() + _shared_classbytes_unloaded->get_value();
  77     } else {

   1 /*
   2  * Copyright (c) 2003, 2016, 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 #ifndef SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP
  26 #define SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP
  27 
  28 #include "logging/log.hpp"
  29 #include "runtime/handles.hpp"
  30 #include "runtime/perfData.hpp"
  31 #include "utilities/growableArray.hpp"
  32 #include "utilities/macros.hpp"
  33 
  34 class InstanceKlass;
  35 
  36 // VM monitoring and management support for the Class Loading subsystem
  37 class ClassLoadingService : public AllStatic {
  38 private:
  39   // Counters for classes loaded from class files
  40   static PerfCounter*  _classes_loaded_count;
  41   static PerfCounter*  _classes_unloaded_count;
  42   static PerfCounter*  _classbytes_loaded;
  43   static PerfCounter*  _classbytes_unloaded;
  44 
  45   // Counters for classes loaded from shared archive
  46   static PerfCounter*  _shared_classes_loaded_count;
  47   static PerfCounter*  _shared_classes_unloaded_count;
  48   static PerfCounter*  _shared_classbytes_loaded;
  49   static PerfCounter*  _shared_classbytes_unloaded;
  50 
  51   static PerfVariable* _class_methods_size;
  52 
  53   static size_t compute_class_size(InstanceKlass* k);
  54 
  55 public:
  56   static void init();
  57 
  58   static bool get_verbose() { return log_is_enabled(Info, classload); }
  59   static bool set_verbose(bool verbose);
  60   static void reset_trace_class_unloading() NOT_MANAGEMENT_RETURN;
  61 
  62   static jlong loaded_class_count() {
  63     return _classes_loaded_count->get_value() + _shared_classes_loaded_count->get_value();
  64   }
  65   static jlong unloaded_class_count() {
  66     return _classes_unloaded_count->get_value() + _shared_classes_unloaded_count->get_value();
  67   }
  68   static jlong loaded_class_bytes() {
  69     if (UsePerfData) {
  70       return _classbytes_loaded->get_value() + _shared_classbytes_loaded->get_value();
  71     } else {
  72       return -1;
  73     }
  74   }
  75   static jlong unloaded_class_bytes() {
  76     if (UsePerfData) {
  77       return _classbytes_unloaded->get_value() + _shared_classbytes_unloaded->get_value();
  78     } else {