hotspot/agent/src/share/classes/sun/jvm/hotspot/compiler/ImmutableOopMap.java
author rbackman
Tue, 05 May 2015 16:50:25 +0200
changeset 30590 14f7f48c1377
parent 5547 hotspot/agent/src/share/classes/sun/jvm/hotspot/compiler/OopMap.java@f4b087cbb361
permissions -rw-r--r--
8064458: OopMap class could be more compact Reviewed-by: kvn, bdelsart
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1
diff changeset
     2
 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
1
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
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1
diff changeset
    21
 * questions.
1
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.compiler;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    26
489c9b5090e2 Initial load
duke
parents:
diff changeset
    27
import java.util.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    28
489c9b5090e2 Initial load
duke
parents:
diff changeset
    29
import sun.jvm.hotspot.code.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    30
import sun.jvm.hotspot.debugger.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    31
import sun.jvm.hotspot.runtime.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    32
import sun.jvm.hotspot.types.*;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    33
30590
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    34
public class ImmutableOopMap extends VMObject {
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    35
  private static CIntegerField countField;
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    36
  private static long classSize;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
489c9b5090e2 Initial load
duke
parents:
diff changeset
    38
  static {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    39
    VM.registerVMInitializedObserver(new Observer() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    40
        public void update(Observable o, Object data) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    41
          initialize(VM.getVM().getTypeDataBase());
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    43
      });
489c9b5090e2 Initial load
duke
parents:
diff changeset
    44
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    45
489c9b5090e2 Initial load
duke
parents:
diff changeset
    46
  private static void initialize(TypeDataBase db) {
30590
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    47
    Type type = db.lookupType("ImmutableOopMap");
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    48
    countField = type.getCIntegerField("_count");
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    49
    classSize = type.getSize();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    50
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    51
30590
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    52
  public ImmutableOopMap(Address addr) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    53
    super(addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    54
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
  //--------------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
  // Internals only below this point
489c9b5090e2 Initial load
duke
parents:
diff changeset
    58
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
    59
30590
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    60
  long getCount() {
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    61
    return countField.getValue(addr);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    62
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    63
30590
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    64
  public Address getData() {
14f7f48c1377 8064458: OopMap class could be more compact
rbackman
parents: 5547
diff changeset
    65
    return addr.addOffsetTo(classSize);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    66
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    67
}