Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
author | coleenp |
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date | Thu, 27 Jan 2011 16:11:27 -0800 |
parents | c18cbe5936b8 |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
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 |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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> CompactingPermGenGen | |
43 <li> TenuredGeneration | |
44 </ul> | |
45 </ul> | |
46 <li> DefNewGeneration | |
47 </ul> | |
48 </ul> | |
49 */ | |
50 | |
51 | |
52 public abstract class Generation extends VMObject { | |
53 private static long reservedFieldOffset; | |
54 private static long virtualSpaceFieldOffset; | |
55 private static CIntegerField levelField; | |
56 protected static final int K = 1024; | |
57 // Fields for class StatRecord | |
58 private static Field statRecordField; | |
59 private static CIntegerField invocationField; | |
60 | |
61 // constants from Name enum | |
62 private static int NAME_DEF_NEW; | |
63 private static int NAME_PAR_NEW; | |
64 private static int NAME_MARK_SWEEP_COMPACT; | |
65 private static int NAME_CONCURRENT_MARK_SWEEP; | |
66 private static int NAME_OTHER; | |
67 | |
68 static { | |
69 VM.registerVMInitializedObserver(new Observer() { | |
70 public void update(Observable o, Object data) { | |
71 initialize(VM.getVM().getTypeDataBase()); | |
72 } | |
73 }); | |
74 } | |
75 | |
76 private static synchronized void initialize(TypeDataBase db) { | |
77 Type type = db.lookupType("Generation"); | |
78 | |
79 reservedFieldOffset = type.getField("_reserved").getOffset(); | |
80 virtualSpaceFieldOffset = type.getField("_virtual_space").getOffset(); | |
81 levelField = type.getCIntegerField("_level"); | |
82 // StatRecord | |
83 statRecordField = type.getField("_stat_record"); | |
84 type = db.lookupType("Generation::StatRecord"); | |
85 invocationField = type.getCIntegerField("invocations"); | |
86 | |
87 // constants from Generation::Name | |
88 NAME_DEF_NEW = db.lookupIntConstant("Generation::DefNew").intValue(); | |
89 NAME_PAR_NEW = db.lookupIntConstant("Generation::ParNew").intValue(); | |
90 NAME_MARK_SWEEP_COMPACT = db.lookupIntConstant("Generation::MarkSweepCompact").intValue(); | |
91 NAME_CONCURRENT_MARK_SWEEP = db.lookupIntConstant("Generation::ConcurrentMarkSweep").intValue(); | |
92 NAME_OTHER = db.lookupIntConstant("Generation::Other").intValue(); | |
93 } | |
94 | |
95 public Generation(Address addr) { | |
96 super(addr); | |
97 } | |
98 | |
99 public static class Name { | |
100 public static final Name DEF_NEW = new Name("DefNew"); | |
101 public static final Name PAR_NEW = new Name("ParNew"); | |
102 public static final Name MARK_SWEEP_COMPACT = new Name("MarkSweepCompact"); | |
103 public static final Name CONCURRENT_MARK_SWEEP = new Name("ConcurrentMarkSweep"); | |
104 public static final Name OTHER = new Name("Other"); | |
105 | |
106 private Name(String value) { | |
107 this.value = value; | |
108 } | |
109 | |
110 private String value; | |
111 public String toString() { | |
112 return value; | |
113 } | |
114 } | |
115 | |
116 public Generation.Name kind() { | |
117 return Generation.Name.OTHER; | |
118 } | |
119 | |
120 static Generation.Name nameForEnum(int value) { | |
121 if (value == NAME_DEF_NEW) { | |
122 return Name.DEF_NEW; | |
123 } else if (value == NAME_PAR_NEW) { | |
124 return Name.PAR_NEW; | |
125 } else if (value == NAME_MARK_SWEEP_COMPACT) { | |
126 return Name.MARK_SWEEP_COMPACT; | |
127 } else if (value == NAME_CONCURRENT_MARK_SWEEP) { | |
128 return Name.CONCURRENT_MARK_SWEEP; | |
129 } else if (value == NAME_OTHER) { | |
130 return Name.OTHER; | |
131 } else { | |
132 throw new RuntimeException("should not reach here"); | |
133 } | |
134 } | |
135 | |
136 public GenerationSpec spec() { | |
137 return ((GenCollectedHeap) VM.getVM().getUniverse().heap()).spec(level()); | |
138 } | |
139 | |
140 public int level() { | |
141 return (int) levelField.getValue(addr); | |
142 } | |
143 | |
144 public int invocations() { | |
145 return getStatRecord().getInvocations(); | |
146 } | |
147 | |
148 /** The maximum number of object bytes the generation can currently | |
149 hold. */ | |
150 public abstract long capacity(); | |
151 | |
152 /** The number of used bytes in the gen. */ | |
153 public abstract long used(); | |
154 | |
155 /** The number of free bytes in the gen. */ | |
156 public abstract long free(); | |
157 | |
158 /** The largest number of contiguous free words in the generation, | |
159 including expansion. (VM's version assumes it is called at a | |
160 safepoint.) */ | |
161 public abstract long contiguousAvailable(); | |
162 | |
163 public MemRegion reserved() { | |
164 return new MemRegion(addr.addOffsetTo(reservedFieldOffset)); | |
165 } | |
166 | |
167 /** Returns a region guaranteed to contain all the objects in the | |
168 generation. */ | |
169 public MemRegion usedRegion() { | |
170 return reserved(); | |
171 } | |
172 | |
173 /* Returns "TRUE" iff "p" points into an allocated object in the | |
174 generation. */ | |
175 public boolean isIn(Address p) { | |
176 GenerationIsInClosure blk = new GenerationIsInClosure(p); | |
177 spaceIterate(blk); | |
178 return (blk.space() != null); | |
179 } | |
180 | |
181 /** Returns "TRUE" iff "p" points into the reserved area of the | |
182 generation. */ | |
183 public boolean isInReserved(Address p) { | |
184 return reserved().contains(p); | |
185 } | |
186 | |
187 protected VirtualSpace virtualSpace() { | |
188 return (VirtualSpace) VMObjectFactory.newObject(VirtualSpace.class, addr.addOffsetTo(virtualSpaceFieldOffset)); | |
189 } | |
190 | |
191 public abstract String name(); | |
192 | |
193 /** Equivalent to spaceIterate(blk, false) */ | |
194 public void spaceIterate(SpaceClosure blk) { | |
195 spaceIterate(blk, false); | |
196 } | |
197 | |
198 /** Iteration - do not use for time critical operations */ | |
199 public abstract void spaceIterate(SpaceClosure blk, boolean usedOnly); | |
200 | |
201 public void print() { printOn(System.out); } | |
202 public abstract void printOn(PrintStream tty); | |
203 | |
204 public static class StatRecord extends VMObject { | |
205 public StatRecord(Address addr) { | |
206 super(addr); | |
207 } | |
208 | |
209 public int getInvocations() { | |
210 return (int) invocationField.getValue(addr); | |
211 } | |
212 | |
213 } | |
214 | |
215 private StatRecord getStatRecord() { | |
216 return (StatRecord) VMObjectFactory.newObject(Generation.StatRecord.class, addr.addOffsetTo(statRecordField.getOffset())); | |
217 } | |
218 } |