Mercurial > hg > truffle

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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
38 public void update(Observable o, Object data) { 38 public void update(Observable o, Object data) {
39 initialize(VM.getVM().getTypeDataBase()); 39 initialize(VM.getVM().getTypeDataBase());
40 } 40 }
41 }); 41 });
42 } 42 }
43 private static long typeSize;
43 44
44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { 45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
45 Type type = db.lookupType("instanceOopDesc"); 46 Type type = db.lookupType("instanceOopDesc");
47 typeSize = type.getSize();
46 } 48 }
47 49
48 Instance(OopHandle handle, ObjectHeap heap) { 50 Instance(OopHandle handle, ObjectHeap heap) {
49 super(handle, heap); 51 super(handle, heap);
52 }
53
54 // Returns header size in bytes.
55 public static long getHeaderSize() {
56 if (VM.getVM().isCompressedOopsEnabled()) {
57 return typeSize - VM.getVM().getIntSize();
58 } else {
59 return typeSize;
60 }
50 } 61 }
51 62
52 public boolean isInstance() { return true; } 63 public boolean isInstance() { return true; }
53 64
54 public void iterateFields(OopVisitor visitor, boolean doVMFields) { 65 public void iterateFields(OopVisitor visitor, boolean doVMFields) {