Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java @ 6842:b9a9ed0f8eeb
7197424: update copyright year to match last edit in jdk8 hotspot repository
Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp
author | mikael |
---|---|
date | Tue, 09 Oct 2012 10:09:34 -0700 |
parents | da91efe96a93 |
children |
rev | line source |
---|---|
0 | 1 /* |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
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. |
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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
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 } |