1 /*
2 * Copyright (c) 2000, 2008, 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 // All heaps contains a "permanent generation," containing permanent
26 // (reflective) objects. This is like a regular generation in some ways,
27 // but unlike one in others, and so is split apart.
28
29 class Generation;
30 class GenRemSet;
31 class CSpaceCounters;
32
33 // PermGen models the part of the heap
34
35 class PermGen : public CHeapObj {
36 friend class VMStructs;
37 protected:
38 size_t _capacity_expansion_limit; // maximum expansion allowed without a
39 // full gc occurring
40
41 HeapWord* mem_allocate_in_gen(size_t size, Generation* gen);
42
43 public:
44 enum Name {
56
57 virtual void oop_iterate(OopClosure* cl) {
58 Generation* g = as_gen();
59 assert(g != NULL, "as_gen() NULL");
60 g->oop_iterate(cl);
61 }
62
63 virtual void object_iterate(ObjectClosure* cl) {
64 Generation* g = as_gen();
65 assert(g != NULL, "as_gen() NULL");
66 g->object_iterate(cl);
67 }
68
69 // Performance Counter support
70 virtual void update_counters() {
71 Generation* g = as_gen();
72 assert(g != NULL, "as_gen() NULL");
73 g->update_counters();
74 }
75 };
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1 /*
2 * Copyright (c) 2000, 2010, 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_MEMORY_PERMGEN_HPP
26 #define SHARE_VM_MEMORY_PERMGEN_HPP
27
28 #include "gc_interface/gcCause.hpp"
29 #include "memory/generation.hpp"
30 #include "memory/iterator.hpp"
31 #include "runtime/handles.hpp"
32 #include "runtime/virtualspace.hpp"
33
34 // All heaps contains a "permanent generation," containing permanent
35 // (reflective) objects. This is like a regular generation in some ways,
36 // but unlike one in others, and so is split apart.
37
38 class Generation;
39 class GenRemSet;
40 class CSpaceCounters;
41
42 // PermGen models the part of the heap
43
44 class PermGen : public CHeapObj {
45 friend class VMStructs;
46 protected:
47 size_t _capacity_expansion_limit; // maximum expansion allowed without a
48 // full gc occurring
49
50 HeapWord* mem_allocate_in_gen(size_t size, Generation* gen);
51
52 public:
53 enum Name {
65
66 virtual void oop_iterate(OopClosure* cl) {
67 Generation* g = as_gen();
68 assert(g != NULL, "as_gen() NULL");
69 g->oop_iterate(cl);
70 }
71
72 virtual void object_iterate(ObjectClosure* cl) {
73 Generation* g = as_gen();
74 assert(g != NULL, "as_gen() NULL");
75 g->object_iterate(cl);
76 }
77
78 // Performance Counter support
79 virtual void update_counters() {
80 Generation* g = as_gen();
81 assert(g != NULL, "as_gen() NULL");
82 g->update_counters();
83 }
84 };
85
86 #endif // SHARE_VM_MEMORY_PERMGEN_HPP
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