Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/memory/Universe.java @ 132:60b728ec77c1
6652736: well known classes in system dictionary are inefficiently processed
Summary: combine many scalar variables into a single enum-indexed array in SystemDictionary.
Reviewed-by: kvn
author | jrose |
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date | Tue, 29 Apr 2008 19:45:22 -0700 |
parents | ba764ed4b6f2 |
children | d1605aabd0a1 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
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.gc_interface.*; | |
31 import sun.jvm.hotspot.gc_implementation.parallelScavenge.*; | |
32 import sun.jvm.hotspot.oops.*; | |
33 import sun.jvm.hotspot.types.*; | |
34 import sun.jvm.hotspot.runtime.*; | |
35 | |
36 | |
37 public class Universe { | |
38 private static AddressField collectedHeapField; | |
39 private static VirtualConstructor heapConstructor; | |
40 private static sun.jvm.hotspot.types.OopField mainThreadGroupField; | |
41 private static sun.jvm.hotspot.types.OopField systemThreadGroupField; | |
42 | |
43 // single dimensional primitive array klasses | |
44 private static sun.jvm.hotspot.types.OopField boolArrayKlassObjField; | |
45 private static sun.jvm.hotspot.types.OopField byteArrayKlassObjField; | |
46 private static sun.jvm.hotspot.types.OopField charArrayKlassObjField; | |
47 private static sun.jvm.hotspot.types.OopField intArrayKlassObjField; | |
48 private static sun.jvm.hotspot.types.OopField shortArrayKlassObjField; | |
49 private static sun.jvm.hotspot.types.OopField longArrayKlassObjField; | |
50 private static sun.jvm.hotspot.types.OopField singleArrayKlassObjField; | |
51 private static sun.jvm.hotspot.types.OopField doubleArrayKlassObjField; | |
52 | |
53 // system obj array klass object | |
54 private static sun.jvm.hotspot.types.OopField systemObjArrayKlassObjField; | |
55 | |
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56 private static AddressField heapBaseField; |
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57 |
0 | 58 static { |
59 VM.registerVMInitializedObserver(new Observer() { | |
60 public void update(Observable o, Object data) { | |
61 initialize(VM.getVM().getTypeDataBase()); | |
62 } | |
63 }); | |
64 } | |
65 | |
66 private static synchronized void initialize(TypeDataBase db) { | |
67 Type type = db.lookupType("Universe"); | |
68 | |
69 collectedHeapField = type.getAddressField("_collectedHeap"); | |
70 | |
71 heapConstructor = new VirtualConstructor(db); | |
72 heapConstructor.addMapping("GenCollectedHeap", GenCollectedHeap.class); | |
73 heapConstructor.addMapping("ParallelScavengeHeap", ParallelScavengeHeap.class); | |
74 | |
75 mainThreadGroupField = type.getOopField("_main_thread_group"); | |
76 systemThreadGroupField = type.getOopField("_system_thread_group"); | |
77 | |
78 boolArrayKlassObjField = type.getOopField("_boolArrayKlassObj"); | |
79 byteArrayKlassObjField = type.getOopField("_byteArrayKlassObj"); | |
80 charArrayKlassObjField = type.getOopField("_charArrayKlassObj"); | |
81 intArrayKlassObjField = type.getOopField("_intArrayKlassObj"); | |
82 shortArrayKlassObjField = type.getOopField("_shortArrayKlassObj"); | |
83 longArrayKlassObjField = type.getOopField("_longArrayKlassObj"); | |
84 singleArrayKlassObjField = type.getOopField("_singleArrayKlassObj"); | |
85 doubleArrayKlassObjField = type.getOopField("_doubleArrayKlassObj"); | |
86 | |
87 systemObjArrayKlassObjField = type.getOopField("_systemObjArrayKlassObj"); | |
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88 |
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89 heapBaseField = type.getAddressField("_heap_base"); |
0 | 90 } |
91 | |
92 public Universe() { | |
93 } | |
94 | |
95 public CollectedHeap heap() { | |
96 try { | |
97 return (CollectedHeap) heapConstructor.instantiateWrapperFor(collectedHeapField.getValue()); | |
98 } catch (WrongTypeException e) { | |
99 return new CollectedHeap(collectedHeapField.getValue()); | |
100 } | |
101 } | |
102 | |
113
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103 public static long getHeapBase() { |
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104 if (heapBaseField.getValue() == null) { |
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105 return 0; |
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106 } else { |
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107 return heapBaseField.getValue().minus(null); |
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108 } |
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109 } |
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110 |
0 | 111 /** Returns "TRUE" iff "p" points into the allocated area of the heap. */ |
112 public boolean isIn(Address p) { | |
113 return heap().isIn(p); | |
114 } | |
115 | |
116 /** Returns "TRUE" iff "p" points into the reserved area of the heap. */ | |
117 public boolean isInReserved(Address p) { | |
118 return heap().isInReserved(p); | |
119 } | |
120 | |
121 private Oop newOop(OopHandle handle) { | |
122 return VM.getVM().getObjectHeap().newOop(handle); | |
123 } | |
124 | |
125 public Oop mainThreadGroup() { | |
126 return newOop(mainThreadGroupField.getValue()); | |
127 } | |
128 | |
129 public Oop systemThreadGroup() { | |
130 return newOop(systemThreadGroupField.getValue()); | |
131 } | |
132 | |
133 public Oop systemObjArrayKlassObj() { | |
134 return newOop(systemObjArrayKlassObjField.getValue()); | |
135 } | |
136 | |
137 // iterate through the single dimensional primitive array klasses | |
138 // refer to basic_type_classes_do(void f(klassOop)) in universe.cpp | |
139 public void basicTypeClassesDo(SystemDictionary.ClassVisitor visitor) { | |
140 visitor.visit((Klass)newOop(boolArrayKlassObjField.getValue())); | |
141 visitor.visit((Klass)newOop(byteArrayKlassObjField.getValue())); | |
142 visitor.visit((Klass)newOop(charArrayKlassObjField.getValue())); | |
143 visitor.visit((Klass)newOop(intArrayKlassObjField.getValue())); | |
144 visitor.visit((Klass)newOop(shortArrayKlassObjField.getValue())); | |
145 visitor.visit((Klass)newOop(longArrayKlassObjField.getValue())); | |
146 visitor.visit((Klass)newOop(singleArrayKlassObjField.getValue())); | |
147 visitor.visit((Klass)newOop(doubleArrayKlassObjField.getValue())); | |
148 } | |
149 | |
150 public void print() { printOn(System.out); } | |
151 public void printOn(PrintStream tty) { | |
152 heap().printOn(tty); | |
153 } | |
154 | |
155 // Check whether an element of a typeArrayOop with the given type must be | |
156 // aligned 0 mod 8. The typeArrayOop itself must be aligned at least this | |
157 // strongly. | |
158 public static boolean elementTypeShouldBeAligned(BasicType type) { | |
159 return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; | |
160 } | |
161 | |
162 // Check whether an object field (static/non-static) of the given type must be | |
163 // aligned 0 mod 8. | |
164 public static boolean fieldTypeShouldBeAligned(BasicType type) { | |
165 return type == BasicType.T_DOUBLE || type == BasicType.T_LONG; | |
166 } | |
167 } |