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comparison agent/src/share/classes/sun/jvm/hotspot/memory/SharedHeap.java @ 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
parents c18cbe5936b8
children
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
31 import sun.jvm.hotspot.gc_interface.*; 31 import sun.jvm.hotspot.gc_interface.*;
32 import sun.jvm.hotspot.runtime.*; 32 import sun.jvm.hotspot.runtime.*;
33 import sun.jvm.hotspot.types.*; 33 import sun.jvm.hotspot.types.*;
34 34
35 public abstract class SharedHeap extends CollectedHeap { 35 public abstract class SharedHeap extends CollectedHeap {
36 private static AddressField permGenField;
37 private static VirtualConstructor ctor; 36 private static VirtualConstructor ctor;
38 37
39 static { 38 static {
40 VM.registerVMInitializedObserver(new Observer() { 39 VM.registerVMInitializedObserver(new Observer() {
41 public void update(Observable o, Object data) { 40 public void update(Observable o, Object data) {
44 }); 43 });
45 } 44 }
46 45
47 private static synchronized void initialize(TypeDataBase db) { 46 private static synchronized void initialize(TypeDataBase db) {
48 Type type = db.lookupType("SharedHeap"); 47 Type type = db.lookupType("SharedHeap");
49 permGenField = type.getAddressField("_perm_gen");
50 ctor = new VirtualConstructor(db); 48 ctor = new VirtualConstructor(db);
51 ctor.addMapping("CompactingPermGen", CompactingPermGen.class);
52 ctor.addMapping("CMSPermGen", CMSPermGen.class);
53
54 } 49 }
55 50
56 public SharedHeap(Address addr) { 51 public SharedHeap(Address addr) {
57 super(addr); 52 super(addr);
58 } 53 }
59 54
60 /** These functions return the "permanent" generation, in which
61 reflective objects are allocated and stored. Two versions, the
62 second of which returns the view of the perm gen as a
63 generation. (FIXME: this distinction is strange and seems
64 unnecessary, and should be cleaned up.) */
65 public PermGen perm() {
66 return (PermGen) ctor.instantiateWrapperFor(permGenField.getValue(addr));
67 }
68
69 public CollectedHeapName kind() { 55 public CollectedHeapName kind() {
70 return CollectedHeapName.SHARED_HEAP; 56 return CollectedHeapName.SHARED_HEAP;
71 } 57 }
72
73 public Generation permGen() {
74 return perm().asGen();
75 } 58 }
76 }