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comparison src/share/vm/oops/instanceClassLoaderKlass.cpp @ 6725:da91efe96a93

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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
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6724:36d1d483d5d6 6725:da91efe96a93
1 /*
2 * Copyright (c) 2011, 2012, 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 #include "precompiled.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "gc_implementation/shared/markSweep.inline.hpp"
29 #include "gc_interface/collectedHeap.inline.hpp"
30 #include "memory/genOopClosures.inline.hpp"
31 #include "memory/oopFactory.hpp"
32 #include "oops/instanceKlass.hpp"
33 #include "oops/instanceClassLoaderKlass.hpp"
34 #include "oops/instanceMirrorKlass.hpp"
35 #include "oops/instanceOop.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "oops/symbol.hpp"
38 #include "runtime/handles.inline.hpp"
39 #ifndef SERIALGC
40 #include "gc_implementation/parNew/parOopClosures.inline.hpp"
41 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
42 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
43 #include "oops/oop.pcgc.inline.hpp"
44 #endif
45
46 #define if_do_metadata_checked(closure, nv_suffix) \
47 /* Make sure the non-virtual and the virtual versions match. */ \
48 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \
49 "Inconsistency in do_metadata"); \
50 if (closure->do_metadata##nv_suffix())
51
52 // Macro to define instanceClassLoaderKlass::oop_oop_iterate for virtual/nonvirtual for
53 // all closures. Macros calling macros above for each oop size.
54 // Since ClassLoader objects have only a pointer to the loader_data, they are not
55 // compressed nor does the pointer move.
56
57 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)\
58 \
59 int instanceClassLoaderKlass:: \
60 oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \
61 /* Get size before changing pointers */ \
62 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\
63 int size = InstanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \
64 \
65 if_do_metadata_checked(closure, nv_suffix) { \
66 ClassLoaderData* cld = java_lang_ClassLoader::loader_data(obj); \
67 /* cld can be null if we have a non-registered class loader. */ \
68 if (cld != NULL) { \
69 closure->do_class_loader_data(cld); \
70 } \
71 } \
72 \
73 return size; \
74 }
75
76 #ifndef SERIALGC
77 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \
78 \
79 int instanceClassLoaderKlass:: \
80 oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) { \
81 /* Get size before changing pointers */ \
82 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\
83 int size = InstanceKlass::oop_oop_iterate_backwards##nv_suffix(obj, closure); \
84 return size; \
85 }
86 #endif // !SERIALGC
87
88
89 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \
90 \
91 int instanceClassLoaderKlass:: \
92 oop_oop_iterate##nv_suffix##_m(oop obj, \
93 OopClosureType* closure, \
94 MemRegion mr) { \
95 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\
96 \
97 int size = InstanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \
98 \
99 if_do_metadata_checked(closure, nv_suffix) { \
100 if (mr.contains(obj)) { \
101 ClassLoaderData* cld = java_lang_ClassLoader::loader_data(obj); \
102 /* cld can be null if we have a non-registered class loader. */ \
103 if (cld != NULL) { \
104 closure->do_class_loader_data(cld); \
105 } \
106 } \
107 } \
108 \
109 return size; \
110 }
111
112 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN)
113 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN)
114 #ifndef SERIALGC
115 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN)
116 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN)
117 #endif // SERIALGC
118 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN_m)
119 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DEFN_m)
120
121 void instanceClassLoaderKlass::oop_follow_contents(oop obj) {
122 InstanceKlass::oop_follow_contents(obj);
123 ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj);
124
125 // We must NULL check here, since the class loader
126 // can be found before the loader data has been set up.
127 if(loader_data != NULL) {
128 MarkSweep::follow_class_loader(loader_data);
129 }
130 }
131
132 #ifndef SERIALGC
133 void instanceClassLoaderKlass::oop_follow_contents(ParCompactionManager* cm,
134 oop obj) {
135 InstanceKlass::oop_follow_contents(cm, obj);
136 ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj);
137 if (loader_data != NULL) {
138 PSParallelCompact::follow_class_loader(cm, loader_data);
139 }
140 }
141
142 void instanceClassLoaderKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
143 InstanceKlass::oop_push_contents(pm, obj);
144
145 // This is called by the young collector. It will already have taken care of
146 // all class loader data. So, we don't have to follow the class loader ->
147 // class loader data link.
148 }
149
150 int instanceClassLoaderKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
151 InstanceKlass::oop_update_pointers(cm, obj);
152 ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj);
153 if (loader_data != NULL) {
154 PSParallelCompact::adjust_class_loader(cm, loader_data);
155 }
156 return size_helper();
157 }
158 #endif // SERIALGC
159