Mercurial > hg > truffle
diff src/share/vm/services/classLoadingService.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/services/classLoadingService.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,135 @@ +/* + * 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); + } +};