comparison src/share/vm/oops/instanceClassLoaderKlass.hpp @ 3602: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
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children aed758eda82a
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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 #ifndef SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
26 #define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
27
28 #include "oops/instanceKlass.hpp"
29
30 // An instanceClassLoaderKlass is a specialization of the InstanceKlass. It does
31 // not add any field. It is added to walk the dependencies for the class loader
32 // key that this class loader points to. This is how the loader_data graph is
33 // walked and dependant class loaders are kept alive. I thought we walked
34 // the list later?
35
36 class instanceClassLoaderKlass: public InstanceKlass {
37 friend class VMStructs;
38 friend class InstanceKlass;
39
40 // Constructor
41 instanceClassLoaderKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
42 : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
43
44 public:
45 virtual bool oop_is_instanceClassLoader() const { return true; }
46
47 instanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
48
49 // Iterators
50 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
51 return oop_oop_iterate_v(obj, blk);
52 }
53 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
54 return oop_oop_iterate_v_m(obj, blk, mr);
55 }
56
57 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
58 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
59 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
60
61 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)
62 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)
63
64 #ifndef SERIALGC
65 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
66 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
67
68 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
69 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
70 #endif // !SERIALGC
71
72 // Garbage collection
73 void oop_follow_contents(oop obj);
74
75 // Parallel Scavenge and Parallel Old
76 PARALLEL_GC_DECLS
77 };
78
79 #endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP