< prev index next >
agent/src/share/classes/sun/jvm/hotspot/memory/TenuredGeneration.java
Print this page
rev 7420 : [mq]: removeOneContigSpaceGeneration
@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -22,17 +22,66 @@
*
*/
package sun.jvm.hotspot.memory;
+import java.io.*;
+import java.util.*;
+
import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+
+/** <P> TenuredGeneration models a heap of old objects contained
+ in a single contiguous space. </P>
+
+ <P> Garbage collection is performed using mark-compact. </P> */
+
+public class TenuredGeneration extends CardGeneration {
+ private static AddressField theSpaceField;
+
+ static {
+ VM.registerVMInitializedObserver(new Observer() {
+ public void update(Observable o, Object data) {
+ initialize(VM.getVM().getTypeDataBase());
+ }
+ });
+ }
+
+ private static synchronized void initialize(TypeDataBase db) {
+ Type type = db.lookupType("TenuredGeneration");
+
+ theSpaceField = type.getAddressField("_the_space");
+ }
-public class TenuredGeneration extends OneContigSpaceCardGeneration {
public TenuredGeneration(Address addr) {
super(addr);
}
+ public ContiguousSpace theSpace() {
+ return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, theSpaceField.getValue(addr));
+ }
+
+ public boolean isIn(Address p) {
+ return theSpace().contains(p);
+ }
+
+ /** Space queries */
+ public long capacity() { return theSpace().capacity(); }
+ public long used() { return theSpace().used(); }
+ public long free() { return theSpace().free(); }
+ public long contiguousAvailable() { return theSpace().free() + virtualSpace().uncommittedSize(); }
+
+ public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
+ blk.doSpace(theSpace());
+ }
+
+ public void printOn(PrintStream tty) {
+ tty.print(" old ");
+ theSpace().printOn(tty);
+ }
+
public Generation.Name kind() {
return Generation.Name.MARK_SWEEP_COMPACT;
}
public String name() {
< prev index next >