Mercurial > hg > graal-compiler
diff agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,218 @@ +/* + * Copyright 2000-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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> CompactingPermGenGen + <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())); + } +}