Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java @ 12825:c90e76575b03
8019375: Internal symbol table size should be tunable.
Reviewed-by: coleenp, kamg
| author | kevinw |
|---|---|
| date | Tue, 08 Oct 2013 09:33:51 +0100 |
| parents | da91efe96a93 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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| 5 * This code is free software; you can redistribute it and/or modify it | |
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| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.memory; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.types.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 | |
| 33 /** <P> The (supported) Generation hierarchy currently looks like this: </P> | |
| 34 | |
| 35 <ul> | |
| 36 <li> Generation | |
| 37 <ul> | |
| 38 <li> CardGeneration | |
| 39 <ul> | |
| 40 <li> OneContigSpaceCardGeneration | |
| 41 <ul> | |
| 42 <li> TenuredGeneration | |
| 43 </ul> | |
| 44 </ul> | |
| 45 <li> DefNewGeneration | |
| 46 </ul> | |
| 47 </ul> | |
| 48 */ | |
| 49 | |
| 50 | |
| 51 public abstract class Generation extends VMObject { | |
| 52 private static long reservedFieldOffset; | |
| 53 private static long virtualSpaceFieldOffset; | |
| 54 private static CIntegerField levelField; | |
| 55 protected static final int K = 1024; | |
| 56 // Fields for class StatRecord | |
| 57 private static Field statRecordField; | |
| 58 private static CIntegerField invocationField; | |
| 59 | |
| 60 // constants from Name enum | |
| 61 private static int NAME_DEF_NEW; | |
| 62 private static int NAME_PAR_NEW; | |
| 63 private static int NAME_MARK_SWEEP_COMPACT; | |
| 64 private static int NAME_CONCURRENT_MARK_SWEEP; | |
| 65 private static int NAME_OTHER; | |
| 66 | |
| 67 static { | |
| 68 VM.registerVMInitializedObserver(new Observer() { | |
| 69 public void update(Observable o, Object data) { | |
| 70 initialize(VM.getVM().getTypeDataBase()); | |
| 71 } | |
| 72 }); | |
| 73 } | |
| 74 | |
| 75 private static synchronized void initialize(TypeDataBase db) { | |
| 76 Type type = db.lookupType("Generation"); | |
| 77 | |
| 78 reservedFieldOffset = type.getField("_reserved").getOffset(); | |
| 79 virtualSpaceFieldOffset = type.getField("_virtual_space").getOffset(); | |
| 80 levelField = type.getCIntegerField("_level"); | |
| 81 // StatRecord | |
| 82 statRecordField = type.getField("_stat_record"); | |
| 83 type = db.lookupType("Generation::StatRecord"); | |
| 84 invocationField = type.getCIntegerField("invocations"); | |
| 85 | |
| 86 // constants from Generation::Name | |
| 87 NAME_DEF_NEW = db.lookupIntConstant("Generation::DefNew").intValue(); | |
| 88 NAME_PAR_NEW = db.lookupIntConstant("Generation::ParNew").intValue(); | |
| 89 NAME_MARK_SWEEP_COMPACT = db.lookupIntConstant("Generation::MarkSweepCompact").intValue(); | |
| 90 NAME_CONCURRENT_MARK_SWEEP = db.lookupIntConstant("Generation::ConcurrentMarkSweep").intValue(); | |
| 91 NAME_OTHER = db.lookupIntConstant("Generation::Other").intValue(); | |
| 92 } | |
| 93 | |
| 94 public Generation(Address addr) { | |
| 95 super(addr); | |
| 96 } | |
| 97 | |
| 98 public static class Name { | |
| 99 public static final Name DEF_NEW = new Name("DefNew"); | |
| 100 public static final Name PAR_NEW = new Name("ParNew"); | |
| 101 public static final Name MARK_SWEEP_COMPACT = new Name("MarkSweepCompact"); | |
| 102 public static final Name CONCURRENT_MARK_SWEEP = new Name("ConcurrentMarkSweep"); | |
| 103 public static final Name OTHER = new Name("Other"); | |
| 104 | |
| 105 private Name(String value) { | |
| 106 this.value = value; | |
| 107 } | |
| 108 | |
| 109 private String value; | |
| 110 public String toString() { | |
| 111 return value; | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 public Generation.Name kind() { | |
| 116 return Generation.Name.OTHER; | |
| 117 } | |
| 118 | |
| 119 static Generation.Name nameForEnum(int value) { | |
| 120 if (value == NAME_DEF_NEW) { | |
| 121 return Name.DEF_NEW; | |
| 122 } else if (value == NAME_PAR_NEW) { | |
| 123 return Name.PAR_NEW; | |
| 124 } else if (value == NAME_MARK_SWEEP_COMPACT) { | |
| 125 return Name.MARK_SWEEP_COMPACT; | |
| 126 } else if (value == NAME_CONCURRENT_MARK_SWEEP) { | |
| 127 return Name.CONCURRENT_MARK_SWEEP; | |
| 128 } else if (value == NAME_OTHER) { | |
| 129 return Name.OTHER; | |
| 130 } else { | |
| 131 throw new RuntimeException("should not reach here"); | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 public GenerationSpec spec() { | |
| 136 return ((GenCollectedHeap) VM.getVM().getUniverse().heap()).spec(level()); | |
| 137 } | |
| 138 | |
| 139 public int level() { | |
| 140 return (int) levelField.getValue(addr); | |
| 141 } | |
| 142 | |
| 143 public int invocations() { | |
| 144 return getStatRecord().getInvocations(); | |
| 145 } | |
| 146 | |
| 147 /** The maximum number of object bytes the generation can currently | |
| 148 hold. */ | |
| 149 public abstract long capacity(); | |
| 150 | |
| 151 /** The number of used bytes in the gen. */ | |
| 152 public abstract long used(); | |
| 153 | |
| 154 /** The number of free bytes in the gen. */ | |
| 155 public abstract long free(); | |
| 156 | |
| 157 /** The largest number of contiguous free words in the generation, | |
| 158 including expansion. (VM's version assumes it is called at a | |
| 159 safepoint.) */ | |
| 160 public abstract long contiguousAvailable(); | |
| 161 | |
| 162 public MemRegion reserved() { | |
| 163 return new MemRegion(addr.addOffsetTo(reservedFieldOffset)); | |
| 164 } | |
| 165 | |
| 166 /** Returns a region guaranteed to contain all the objects in the | |
| 167 generation. */ | |
| 168 public MemRegion usedRegion() { | |
| 169 return reserved(); | |
| 170 } | |
| 171 | |
| 172 /* Returns "TRUE" iff "p" points into an allocated object in the | |
| 173 generation. */ | |
| 174 public boolean isIn(Address p) { | |
| 175 GenerationIsInClosure blk = new GenerationIsInClosure(p); | |
| 176 spaceIterate(blk); | |
| 177 return (blk.space() != null); | |
| 178 } | |
| 179 | |
| 180 /** Returns "TRUE" iff "p" points into the reserved area of the | |
| 181 generation. */ | |
| 182 public boolean isInReserved(Address p) { | |
| 183 return reserved().contains(p); | |
| 184 } | |
| 185 | |
| 186 protected VirtualSpace virtualSpace() { | |
| 187 return (VirtualSpace) VMObjectFactory.newObject(VirtualSpace.class, addr.addOffsetTo(virtualSpaceFieldOffset)); | |
| 188 } | |
| 189 | |
| 190 public abstract String name(); | |
| 191 | |
| 192 /** Equivalent to spaceIterate(blk, false) */ | |
| 193 public void spaceIterate(SpaceClosure blk) { | |
| 194 spaceIterate(blk, false); | |
| 195 } | |
| 196 | |
| 197 /** Iteration - do not use for time critical operations */ | |
| 198 public abstract void spaceIterate(SpaceClosure blk, boolean usedOnly); | |
| 199 | |
| 200 public void print() { printOn(System.out); } | |
| 201 public abstract void printOn(PrintStream tty); | |
| 202 | |
| 203 public static class StatRecord extends VMObject { | |
| 204 public StatRecord(Address addr) { | |
| 205 super(addr); | |
| 206 } | |
| 207 | |
| 208 public int getInvocations() { | |
| 209 return (int) invocationField.getValue(addr); | |
| 210 } | |
| 211 | |
| 212 } | |
| 213 | |
| 214 private StatRecord getStatRecord() { | |
| 215 return (StatRecord) VMObjectFactory.newObject(Generation.StatRecord.class, addr.addOffsetTo(statRecordField.getOffset())); | |
| 216 } | |
| 217 } |