| /* |
| * Copyright 2003-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| class instanceKlass; |
| |
| // VM monitoring and management support for the Class Loading subsystem |
| class ClassLoadingService : public AllStatic { |
| private: |
| // Counters for classes loaded from class files |
| static PerfCounter* _classes_loaded_count; |
| static PerfCounter* _classes_unloaded_count; |
| static PerfCounter* _classbytes_loaded; |
| static PerfCounter* _classbytes_unloaded; |
| |
| // Counters for classes loaded from shared archive |
| static PerfCounter* _shared_classes_loaded_count; |
| static PerfCounter* _shared_classes_unloaded_count; |
| static PerfCounter* _shared_classbytes_loaded; |
| static PerfCounter* _shared_classbytes_unloaded; |
| |
| static PerfVariable* _class_methods_size; |
| |
| static size_t compute_class_size(instanceKlass* k); |
| |
| public: |
| static void init(); |
| |
| static bool get_verbose() { return TraceClassLoading; } |
| static bool set_verbose(bool verbose); |
| static void reset_trace_class_unloading(); |
| |
| static jlong loaded_class_count() { |
| return _classes_loaded_count->get_value() + _shared_classes_loaded_count->get_value(); |
| } |
| static jlong unloaded_class_count() { |
| return _classes_unloaded_count->get_value() + _shared_classes_unloaded_count->get_value(); |
| } |
| static jlong loaded_class_bytes() { |
| if (UsePerfData) { |
| return _classbytes_loaded->get_value() + _shared_classbytes_loaded->get_value(); |
| } else { |
| return -1; |
| } |
| } |
| static jlong unloaded_class_bytes() { |
| if (UsePerfData) { |
| return _classbytes_unloaded->get_value() + _shared_classbytes_unloaded->get_value(); |
| } else { |
| return -1; |
| } |
| } |
| |
| static jlong loaded_shared_class_count() { |
| return _shared_classes_loaded_count->get_value(); |
| } |
| static jlong unloaded_shared_class_count() { |
| return _shared_classes_unloaded_count->get_value(); |
| } |
| static jlong loaded_shared_class_bytes() { |
| if (UsePerfData) { |
| return _shared_classbytes_loaded->get_value(); |
| } else { |
| return -1; |
| } |
| } |
| static jlong unloaded_shared_class_bytes() { |
| if (UsePerfData) { |
| return _shared_classbytes_unloaded->get_value(); |
| } else { |
| return -1; |
| } |
| } |
| static jlong class_method_data_size() { |
| return (UsePerfData ? _class_methods_size->get_value() : -1); |
| } |
| |
| static void notify_class_loaded(instanceKlass* k, bool shared_class); |
| // All unloaded classes are non-shared |
| static void notify_class_unloaded(instanceKlass* k); |
| static void add_class_method_size(int size) { |
| if (UsePerfData) { |
| _class_methods_size->inc(size); |
| } |
| } |
| }; |
| |
| // FIXME: make this piece of code to be shared by M&M and JVMTI |
| class LoadedClassesEnumerator : public StackObj { |
| private: |
| static GrowableArray<KlassHandle>* _loaded_classes; |
| // _current_thread is for creating a KlassHandle with a faster version constructor |
| static Thread* _current_thread; |
| |
| GrowableArray<KlassHandle>* _klass_handle_array; |
| |
| public: |
| LoadedClassesEnumerator(Thread* cur_thread); |
| |
| int num_loaded_classes() { return _klass_handle_array->length(); } |
| KlassHandle get_klass(int index) { return _klass_handle_array->at(index); } |
| |
| static void add_loaded_class(klassOop k) { |
| // FIXME: For now - don't include array klasses |
| // The spec is unclear at this point to count array klasses or not |
| // and also indirect creation of array of super class and secondaries |
| // |
| // for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
| // KlassHandle h(_current_thread, l); |
| // _loaded_classes->append(h); |
| // } |
| KlassHandle h(_current_thread, k); |
| _loaded_classes->append(h); |
| } |
| }; |