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comparison agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCache.java @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents a61af66fc99e
children d1605aabd0a1
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
29 import sun.jvm.hotspot.debugger.*; 29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*; 30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*; 31 import sun.jvm.hotspot.types.*;
32 import sun.jvm.hotspot.utilities.*; 32 import sun.jvm.hotspot.utilities.*;
33 33
34 // A ConstantPool is an array containing class constants 34 // ConstantPoolCache : A constant pool cache (constantPoolCacheOopDesc).
35 // as described in the class file 35 // See cpCacheOop.hpp for details about this class.
36 36 //
37 public class ConstantPoolCache extends Array { 37 public class ConstantPoolCache extends Oop {
38 static { 38 static {
39 VM.registerVMInitializedObserver(new Observer() { 39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) { 40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase()); 41 initialize(VM.getVM().getTypeDataBase());
42 } 42 }
45 45
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47 Type type = db.lookupType("constantPoolCacheOopDesc"); 47 Type type = db.lookupType("constantPoolCacheOopDesc");
48 constants = new OopField(type.getOopField("_constant_pool"), 0); 48 constants = new OopField(type.getOopField("_constant_pool"), 0);
49 baseOffset = type.getSize(); 49 baseOffset = type.getSize();
50
51 Type elType = db.lookupType("ConstantPoolCacheEntry"); 50 Type elType = db.lookupType("ConstantPoolCacheEntry");
52 elementSize = elType.getSize(); 51 elementSize = elType.getSize();
52 length = new CIntField(type.getCIntegerField("_length"), 0);
53 } 53 }
54 54
55 ConstantPoolCache(OopHandle handle, ObjectHeap heap) { 55 ConstantPoolCache(OopHandle handle, ObjectHeap heap) {
56 super(handle, heap); 56 super(handle, heap);
57 } 57 }
60 60
61 private static OopField constants; 61 private static OopField constants;
62 62
63 private static long baseOffset; 63 private static long baseOffset;
64 private static long elementSize; 64 private static long elementSize;
65 private static CIntField length;
66
65 67
66 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } 68 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); }
67 69
68 public long getObjectSize() { 70 public long getObjectSize() {
69 return alignObjectSize(baseOffset + getLength() * elementSize); 71 return alignObjectSize(baseOffset + getLength() * elementSize);
85 87
86 public void printValueOn(PrintStream tty) { 88 public void printValueOn(PrintStream tty) {
87 tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString()); 89 tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString());
88 } 90 }
89 91
92 public int getLength() {
93 return (int) length.getValue(this);
94 }
95
90 public void iterateFields(OopVisitor visitor, boolean doVMFields) { 96 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
91 super.iterateFields(visitor, doVMFields); 97 super.iterateFields(visitor, doVMFields);
92 if (doVMFields) { 98 if (doVMFields) {
93 visitor.doOop(constants, true); 99 visitor.doOop(constants, true);
94 for (int i = 0; i < getLength(); i++) { 100 for (int i = 0; i < getLength(); i++) {