Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/gc_interface/CollectedHeap.java @ 6725: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 |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | c18cbe5936b8 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. |
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5 * This code is free software; you can redistribute it and/or modify it | |
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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 | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.gc_interface; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.memory.*; | |
32 import sun.jvm.hotspot.runtime.*; | |
33 import sun.jvm.hotspot.types.*; | |
34 | |
35 public class CollectedHeap extends VMObject { | |
36 private static long reservedFieldOffset; | |
37 | |
38 static { | |
39 VM.registerVMInitializedObserver(new Observer() { | |
40 public void update(Observable o, Object data) { | |
41 initialize(VM.getVM().getTypeDataBase()); | |
42 } | |
43 }); | |
44 } | |
45 | |
46 private static synchronized void initialize(TypeDataBase db) { | |
47 Type type = db.lookupType("CollectedHeap"); | |
48 | |
49 reservedFieldOffset = type.getField("_reserved").getOffset(); | |
50 } | |
51 | |
52 public CollectedHeap(Address addr) { | |
53 super(addr); | |
54 } | |
55 | |
56 /** Returns the lowest address of the heap. */ | |
57 public Address start() { | |
58 return reservedRegion().start(); | |
59 } | |
60 | |
61 public long capacity() { return 0; } | |
62 public long used() { return 0; } | |
63 | |
64 public MemRegion reservedRegion() { | |
65 return new MemRegion(addr.addOffsetTo(reservedFieldOffset)); | |
66 } | |
67 | |
68 public boolean isIn(Address a) { | |
69 return isInReserved(a); | |
70 } | |
71 | |
72 public boolean isInReserved(Address a) { | |
73 return reservedRegion().contains(a); | |
74 } | |
75 | |
76 public CollectedHeapName kind() { | |
77 return CollectedHeapName.ABSTRACT; | |
78 } | |
79 | |
80 public void print() { printOn(System.out); } | |
81 public void printOn(PrintStream tty) { | |
82 MemRegion mr = reservedRegion(); | |
83 tty.println("unknown subtype of CollectedHeap @ " + getAddress() + " (" + | |
84 mr.start() + "," + mr.end() + ")"); | |
85 } | |
86 } |