hotspot/agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCacheKlass.java
author coleenp
Sun, 13 Apr 2008 17:43:42 -0400
changeset 360 21d113ecbf6a
parent 1 489c9b5090e2
child 670 ddf3e9583f2f
permissions -rw-r--r--
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
489c9b5090e2 Initial load
duke
parents:
diff changeset
     2
 * Copyright 2000-2001 Sun Microsystems, Inc.  All Rights Reserved.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    19
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    20
 * CA 95054 USA or visit www.sun.com if you need additional information or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    21
 * have any questions.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
489c9b5090e2 Initial load
duke
parents:
diff changeset
    25
package sun.jvm.hotspot.oops;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    26
489c9b5090e2 Initial load
duke
parents:
diff changeset
    27
import java.io.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    28
import java.util.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    29
import sun.jvm.hotspot.debugger.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    30
import sun.jvm.hotspot.runtime.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    31
import sun.jvm.hotspot.types.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    32
489c9b5090e2 Initial load
duke
parents:
diff changeset
    33
// A ConstantPoolCacheKlass is the klass of a ConstantPoolCache
489c9b5090e2 Initial load
duke
parents:
diff changeset
    34
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    35
public class ConstantPoolCacheKlass extends Klass {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    36
  static {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
    VM.registerVMInitializedObserver(new Observer() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    38
        public void update(Observable o, Object data) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    39
          initialize(VM.getVM().getTypeDataBase());
489c9b5090e2 Initial load
duke
parents:
diff changeset
    40
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    41
      });
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    43
489c9b5090e2 Initial load
duke
parents:
diff changeset
    44
  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    45
    Type type  = db.lookupType("constantPoolCacheKlass");
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    46
    headerSize = type.getSize() + Oop.getHeaderSize();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    47
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    48
489c9b5090e2 Initial load
duke
parents:
diff changeset
    49
  ConstantPoolCacheKlass(OopHandle handle, ObjectHeap heap) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    50
    super(handle, heap);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    51
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    53
  public long getObjectSize() { return alignObjectSize(headerSize); }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    54
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
  public void printValueOn(PrintStream tty) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
    tty.print("ConstantPoolCacheKlass");
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
  }
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    58
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    59
  private static long headerSize;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    60
}
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    61
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
    62