Mercurial > hg > truffle
annotate src/share/vm/services/classLoadingService.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | f95d63e2154a |
| children | fb19af007ffc |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6725
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6964458: Reimplement class meta-data storage to use native memory
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 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 | |
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32 class InstanceKlass; |
| 0 | 33 |
| 34 // VM monitoring and management support for the Class Loading subsystem | |
| 35 class ClassLoadingService : public AllStatic { | |
| 36 private: | |
| 37 // Counters for classes loaded from class files | |
| 38 static PerfCounter* _classes_loaded_count; | |
| 39 static PerfCounter* _classes_unloaded_count; | |
| 40 static PerfCounter* _classbytes_loaded; | |
| 41 static PerfCounter* _classbytes_unloaded; | |
| 42 | |
| 43 // Counters for classes loaded from shared archive | |
| 44 static PerfCounter* _shared_classes_loaded_count; | |
| 45 static PerfCounter* _shared_classes_unloaded_count; | |
| 46 static PerfCounter* _shared_classbytes_loaded; | |
| 47 static PerfCounter* _shared_classbytes_unloaded; | |
| 48 | |
| 49 static PerfVariable* _class_methods_size; | |
| 50 | |
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51 static size_t compute_class_size(InstanceKlass* k); |
| 0 | 52 |
| 53 public: | |
| 54 static void init(); | |
| 55 | |
| 56 static bool get_verbose() { return TraceClassLoading; } | |
| 57 static bool set_verbose(bool verbose); | |
| 58 static void reset_trace_class_unloading(); | |
| 59 | |
| 60 static jlong loaded_class_count() { | |
| 61 return _classes_loaded_count->get_value() + _shared_classes_loaded_count->get_value(); | |
| 62 } | |
| 63 static jlong unloaded_class_count() { | |
| 64 return _classes_unloaded_count->get_value() + _shared_classes_unloaded_count->get_value(); | |
| 65 } | |
| 66 static jlong loaded_class_bytes() { | |
| 67 if (UsePerfData) { | |
| 68 return _classbytes_loaded->get_value() + _shared_classbytes_loaded->get_value(); | |
| 69 } else { | |
| 70 return -1; | |
| 71 } | |
| 72 } | |
| 73 static jlong unloaded_class_bytes() { | |
| 74 if (UsePerfData) { | |
| 75 return _classbytes_unloaded->get_value() + _shared_classbytes_unloaded->get_value(); | |
| 76 } else { | |
| 77 return -1; | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 static jlong loaded_shared_class_count() { | |
| 82 return _shared_classes_loaded_count->get_value(); | |
| 83 } | |
| 84 static jlong unloaded_shared_class_count() { | |
| 85 return _shared_classes_unloaded_count->get_value(); | |
| 86 } | |
| 87 static jlong loaded_shared_class_bytes() { | |
| 88 if (UsePerfData) { | |
| 89 return _shared_classbytes_loaded->get_value(); | |
| 90 } else { | |
| 91 return -1; | |
| 92 } | |
| 93 } | |
| 94 static jlong unloaded_shared_class_bytes() { | |
| 95 if (UsePerfData) { | |
| 96 return _shared_classbytes_unloaded->get_value(); | |
| 97 } else { | |
| 98 return -1; | |
| 99 } | |
| 100 } | |
| 101 static jlong class_method_data_size() { | |
| 102 return (UsePerfData ? _class_methods_size->get_value() : -1); | |
| 103 } | |
| 104 | |
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105 static void notify_class_loaded(InstanceKlass* k, bool shared_class); |
| 0 | 106 // All unloaded classes are non-shared |
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107 static void notify_class_unloaded(InstanceKlass* k); |
| 0 | 108 static void add_class_method_size(int size) { |
| 109 if (UsePerfData) { | |
| 110 _class_methods_size->inc(size); | |
| 111 } | |
| 112 } | |
| 113 }; | |
| 114 | |
| 115 // FIXME: make this piece of code to be shared by M&M and JVMTI | |
| 116 class LoadedClassesEnumerator : public StackObj { | |
| 117 private: | |
| 118 static GrowableArray<KlassHandle>* _loaded_classes; | |
| 119 // _current_thread is for creating a KlassHandle with a faster version constructor | |
| 120 static Thread* _current_thread; | |
| 121 | |
| 122 GrowableArray<KlassHandle>* _klass_handle_array; | |
| 123 | |
| 124 public: | |
| 125 LoadedClassesEnumerator(Thread* cur_thread); | |
| 126 | |
| 127 int num_loaded_classes() { return _klass_handle_array->length(); } | |
| 128 KlassHandle get_klass(int index) { return _klass_handle_array->at(index); } | |
| 129 | |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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130 static void add_loaded_class(Klass* k) { |
| 0 | 131 // FIXME: For now - don't include array klasses |
| 132 // The spec is unclear at this point to count array klasses or not | |
| 133 // and also indirect creation of array of super class and secondaries | |
| 134 // | |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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135 // for (Klass* l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
| 0 | 136 // KlassHandle h(_current_thread, l); |
| 137 // _loaded_classes->append(h); | |
| 138 // } | |
| 139 KlassHandle h(_current_thread, k); | |
| 140 _loaded_classes->append(h); | |
| 141 } | |
| 142 }; | |
| 1972 | 143 |
| 144 #endif // SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP |