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comparison agent/src/share/classes/sun/jvm/hotspot/oops/OopUtilities.java @ 2411:63997f575155

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7031614: jmap -permstat fails with java.lang.InternalError in sun.jvm.hotspot.oops.OopField.getValue Reviewed-by: kvn, dcubed
author never
date Wed, 30 Mar 2011 07:47:19 -0700
parents c7f3d0b4570f
children f6f3bb0ee072
comparison
equal deleted inserted replaced
2410:fe1dbd98e18f 2411:63997f575155
72 private static int THREAD_STATUS_PARKED_TIMED; 72 private static int THREAD_STATUS_PARKED_TIMED;
73 private static int THREAD_STATUS_BLOCKED_ON_MONITOR_ENTER; 73 private static int THREAD_STATUS_BLOCKED_ON_MONITOR_ENTER;
74 private static int THREAD_STATUS_TERMINATED; 74 private static int THREAD_STATUS_TERMINATED;
75 */ 75 */
76 76
77 // java.lang.Class fields
78 private static OopField hcKlassField;
79
80 // java.util.concurrent.locks.AbstractOwnableSynchronizer fields 77 // java.util.concurrent.locks.AbstractOwnableSynchronizer fields
81 private static OopField absOwnSyncOwnerThreadField; 78 private static OopField absOwnSyncOwnerThreadField;
82 79
83 static { 80 static {
84 VM.registerVMInitializedObserver(new Observer() { 81 VM.registerVMInitializedObserver(new Observer() {
266 return threadParkBlockerField.getValue(threadOop); 263 return threadParkBlockerField.getValue(threadOop);
267 } 264 }
268 return null; 265 return null;
269 } 266 }
270 267
271 // initialize fields for java.lang.Class
272 private static void initClassFields() {
273 if (hcKlassField == null) {
274 // hc_klass is a HotSpot magic field and hence we can't
275 // find it from InstanceKlass for java.lang.Class.
276 TypeDataBase db = VM.getVM().getTypeDataBase();
277 int hcKlassOffset = (int) db.lookupType("java_lang_Class").getCIntegerField("klass_offset").getValue();
278 if (VM.getVM().isCompressedOopsEnabled()) {
279 hcKlassField = new NarrowOopField(new NamedFieldIdentifier("hc_klass"), hcKlassOffset, true);
280 } else {
281 hcKlassField = new OopField(new NamedFieldIdentifier("hc_klass"), hcKlassOffset, true);
282 }
283 }
284 }
285
286 /** get klassOop field at offset hc_klass_offset from a java.lang.Class object */
287 public static Klass classOopToKlass(Oop aClass) {
288 initClassFields();
289 return (Klass) hcKlassField.getValue(aClass);
290 }
291
292 // initialize fields for j.u.c.l AbstractOwnableSynchornizer class 268 // initialize fields for j.u.c.l AbstractOwnableSynchornizer class
293 private static void initAbsOwnSyncFields() { 269 private static void initAbsOwnSyncFields() {
294 if (absOwnSyncOwnerThreadField == null) { 270 if (absOwnSyncOwnerThreadField == null) {
295 SystemDictionary sysDict = VM.getVM().getSystemDictionary(); 271 SystemDictionary sysDict = VM.getVM().getSystemDictionary();
296 InstanceKlass k = sysDict.getAbstractOwnableSynchronizerKlass(); 272 InstanceKlass k = sysDict.getAbstractOwnableSynchronizerKlass();