Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java @ 17467:55fb97c4c58d hs25-b65
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
author | mikael |
---|---|
date | Tue, 24 Dec 2013 11:48:39 -0800 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2000, 2012, 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. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.memory; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; /** <P> The (supported) Generation hierarchy currently looks like this: </P> <ul> <li> Generation <ul> <li> CardGeneration <ul> <li> OneContigSpaceCardGeneration <ul> <li> TenuredGeneration </ul> </ul> <li> DefNewGeneration </ul> </ul> */ public abstract class Generation extends VMObject { private static long reservedFieldOffset; private static long virtualSpaceFieldOffset; private static CIntegerField levelField; protected static final int K = 1024; // Fields for class StatRecord private static Field statRecordField; private static CIntegerField invocationField; // constants from Name enum private static int NAME_DEF_NEW; private static int NAME_PAR_NEW; private static int NAME_MARK_SWEEP_COMPACT; private static int NAME_CONCURRENT_MARK_SWEEP; private static int NAME_OTHER; 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("Generation"); reservedFieldOffset = type.getField("_reserved").getOffset(); virtualSpaceFieldOffset = type.getField("_virtual_space").getOffset(); levelField = type.getCIntegerField("_level"); // StatRecord statRecordField = type.getField("_stat_record"); type = db.lookupType("Generation::StatRecord"); invocationField = type.getCIntegerField("invocations"); // constants from Generation::Name NAME_DEF_NEW = db.lookupIntConstant("Generation::DefNew").intValue(); NAME_PAR_NEW = db.lookupIntConstant("Generation::ParNew").intValue(); NAME_MARK_SWEEP_COMPACT = db.lookupIntConstant("Generation::MarkSweepCompact").intValue(); NAME_CONCURRENT_MARK_SWEEP = db.lookupIntConstant("Generation::ConcurrentMarkSweep").intValue(); NAME_OTHER = db.lookupIntConstant("Generation::Other").intValue(); } public Generation(Address addr) { super(addr); } public static class Name { public static final Name DEF_NEW = new Name("DefNew"); public static final Name PAR_NEW = new Name("ParNew"); public static final Name MARK_SWEEP_COMPACT = new Name("MarkSweepCompact"); public static final Name CONCURRENT_MARK_SWEEP = new Name("ConcurrentMarkSweep"); public static final Name OTHER = new Name("Other"); private Name(String value) { this.value = value; } private String value; public String toString() { return value; } } public Generation.Name kind() { return Generation.Name.OTHER; } static Generation.Name nameForEnum(int value) { if (value == NAME_DEF_NEW) { return Name.DEF_NEW; } else if (value == NAME_PAR_NEW) { return Name.PAR_NEW; } else if (value == NAME_MARK_SWEEP_COMPACT) { return Name.MARK_SWEEP_COMPACT; } else if (value == NAME_CONCURRENT_MARK_SWEEP) { return Name.CONCURRENT_MARK_SWEEP; } else if (value == NAME_OTHER) { return Name.OTHER; } else { throw new RuntimeException("should not reach here"); } } public GenerationSpec spec() { return ((GenCollectedHeap) VM.getVM().getUniverse().heap()).spec(level()); } public int level() { return (int) levelField.getValue(addr); } public int invocations() { return getStatRecord().getInvocations(); } /** The maximum number of object bytes the generation can currently hold. */ public abstract long capacity(); /** The number of used bytes in the gen. */ public abstract long used(); /** The number of free bytes in the gen. */ public abstract long free(); /** The largest number of contiguous free words in the generation, including expansion. (VM's version assumes it is called at a safepoint.) */ public abstract long contiguousAvailable(); public MemRegion reserved() { return new MemRegion(addr.addOffsetTo(reservedFieldOffset)); } /** Returns a region guaranteed to contain all the objects in the generation. */ public MemRegion usedRegion() { return reserved(); } /* Returns "TRUE" iff "p" points into an allocated object in the generation. */ public boolean isIn(Address p) { GenerationIsInClosure blk = new GenerationIsInClosure(p); spaceIterate(blk); return (blk.space() != null); } /** Returns "TRUE" iff "p" points into the reserved area of the generation. */ public boolean isInReserved(Address p) { return reserved().contains(p); } protected VirtualSpace virtualSpace() { return (VirtualSpace) VMObjectFactory.newObject(VirtualSpace.class, addr.addOffsetTo(virtualSpaceFieldOffset)); } public abstract String name(); /** Equivalent to spaceIterate(blk, false) */ public void spaceIterate(SpaceClosure blk) { spaceIterate(blk, false); } /** Iteration - do not use for time critical operations */ public abstract void spaceIterate(SpaceClosure blk, boolean usedOnly); public void print() { printOn(System.out); } public abstract void printOn(PrintStream tty); public static class StatRecord extends VMObject { public StatRecord(Address addr) { super(addr); } public int getInvocations() { return (int) invocationField.getValue(addr); } } private StatRecord getStatRecord() { return (StatRecord) VMObjectFactory.newObject(Generation.StatRecord.class, addr.addOffsetTo(statRecordField.getOffset())); } }