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comparison agent/src/share/classes/sun/jvm/hotspot/oops/ObjArrayKlass.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 d8ce2825b193
comparison
equal deleted inserted replaced
6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2000, 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.
42 }); 42 });
43 } 43 }
44 44
45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
46 Type type = db.lookupType("objArrayKlass"); 46 Type type = db.lookupType("objArrayKlass");
47 elementKlass = new OopField(type.getOopField("_element_klass"), Oop.getHeaderSize()); 47 elementKlass = new MetadataField(type.getAddressField("_element_klass"), 0);
48 bottomKlass = new OopField(type.getOopField("_bottom_klass"), Oop.getHeaderSize()); 48 bottomKlass = new MetadataField(type.getAddressField("_bottom_klass"), 0);
49 } 49 }
50 50
51 ObjArrayKlass(OopHandle handle, ObjectHeap heap) { 51 public ObjArrayKlass(Address addr) {
52 super(handle, heap); 52 super(addr);
53 } 53 }
54 54
55 private static OopField elementKlass; 55 private static MetadataField elementKlass;
56 private static OopField bottomKlass; 56 private static MetadataField bottomKlass;
57 57
58 public Klass getElementKlass() { return (Klass) elementKlass.getValue(this); } 58 public Klass getElementKlass() { return (Klass) elementKlass.getValue(this); }
59 public Klass getBottomKlass() { return (Klass) bottomKlass.getValue(this); } 59 public Klass getBottomKlass() { return (Klass) bottomKlass.getValue(this); }
60 60
61 public long computeModifierFlags() { 61 public long computeModifierFlags() {
69 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL; 69 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL;
70 } 70 }
71 return arrayFlags; 71 return arrayFlags;
72 } 72 }
73 73
74 public void iterateFields(OopVisitor visitor, boolean doVMFields) { 74 public void iterateFields(MetadataVisitor visitor) {
75 super.iterateFields(visitor, doVMFields); 75 super.iterateFields(visitor);
76 if (doVMFields) { 76 visitor.doMetadata(elementKlass, true);
77 visitor.doOop(elementKlass, true); 77 visitor.doMetadata(bottomKlass, true);
78 visitor.doOop(bottomKlass, true);
79 }
80 } 78 }
81 79
82 public Klass arrayKlassImpl(boolean orNull, int n) { 80 public Klass arrayKlassImpl(boolean orNull, int n) {
83 if (Assert.ASSERTS_ENABLED) { 81 if (Assert.ASSERTS_ENABLED) {
84 Assert.that(getDimension() <= n, "check order of chain"); 82 Assert.that(getDimension() <= n, "check order of chain");