Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/jdi/ObjectReferenceImpl.java @ 844:bd02caa94611
6862919: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 07/09
Reviewed-by: tbell, ohair
| author | xdono |
|---|---|
| date | Tue, 28 Jul 2009 12:12:40 -0700 |
| parents | b109e761e927 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 844 | 2 * Copyright 2002-2009 Sun Microsystems, Inc. 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 * | |
| 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.jdi; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import com.sun.jdi.*; | |
| 29 | |
| 30 import sun.jvm.hotspot.debugger.Address; | |
| 31 import sun.jvm.hotspot.debugger.OopHandle; | |
| 32 import sun.jvm.hotspot.oops.Oop; | |
| 33 import sun.jvm.hotspot.oops.Mark; | |
| 34 import sun.jvm.hotspot.oops.Instance; | |
| 35 import sun.jvm.hotspot.oops.Array; | |
| 36 import sun.jvm.hotspot.oops.OopUtilities; | |
| 37 import sun.jvm.hotspot.oops.Klass; | |
| 38 import sun.jvm.hotspot.oops.DefaultHeapVisitor; | |
| 39 import sun.jvm.hotspot.runtime.JavaThread; | |
| 40 import sun.jvm.hotspot.runtime.JavaVFrame; | |
| 41 import sun.jvm.hotspot.runtime.MonitorInfo; | |
| 42 import sun.jvm.hotspot.runtime.ObjectMonitor; | |
| 43 import sun.jvm.hotspot.runtime.Threads; | |
| 44 import sun.jvm.hotspot.utilities.Assert; | |
| 45 | |
| 46 import java.util.*; | |
| 47 | |
| 48 public class ObjectReferenceImpl extends ValueImpl implements ObjectReference { | |
| 49 private Oop saObject; | |
| 50 private long myID; | |
| 51 private boolean monitorInfoCached = false; | |
| 52 private ThreadReferenceImpl owningThread = null; | |
| 53 private List waitingThreads = null; // List<ThreadReferenceImpl> | |
| 54 private int entryCount = 0; | |
| 55 | |
| 56 private static long nextID = 0L; | |
| 57 private static synchronized long nextID() { | |
| 58 return nextID++; | |
| 59 } | |
| 60 | |
| 61 ObjectReferenceImpl(VirtualMachine aVm, sun.jvm.hotspot.oops.Oop oRef) { | |
| 62 super(aVm); | |
| 63 saObject = oRef; | |
| 64 myID = nextID(); | |
| 65 } | |
| 66 | |
| 67 protected Oop ref() { | |
| 68 return saObject; | |
| 69 } | |
| 70 | |
| 71 public Type type() { | |
| 72 return referenceType(); | |
| 73 } | |
| 74 | |
| 75 public ReferenceType referenceType() { | |
| 76 Klass myKlass = ref().getKlass(); | |
| 77 return vm.referenceType(myKlass); | |
| 78 } | |
| 79 | |
| 80 public Value getValue(Field sig) { | |
| 81 List list = new ArrayList(1); | |
| 82 list.add(sig); | |
| 83 Map map = getValues(list); | |
| 84 return(Value)map.get(sig); | |
| 85 } | |
| 86 | |
| 87 public Map getValues(List theFields) { | |
| 88 //validateMirrors(theFields); | |
| 89 | |
| 90 List staticFields = new ArrayList(0); | |
| 91 int size = theFields.size(); | |
| 92 List instanceFields = new ArrayList(size); | |
| 93 | |
| 94 for (int i=0; i<size; i++) { | |
| 95 sun.jvm.hotspot.jdi.FieldImpl field = | |
| 96 (sun.jvm.hotspot.jdi.FieldImpl)theFields.get(i); | |
| 97 | |
| 98 // Make sure the field is valid | |
| 99 ((ReferenceTypeImpl)referenceType()).validateFieldAccess(field); | |
| 100 | |
| 101 // FIX ME! We need to do some sanity checking | |
| 102 // here; make sure the field belongs to this | |
| 103 // object. | |
| 104 if (field.isStatic()) { | |
| 105 staticFields.add(field); | |
| 106 } else { | |
| 107 instanceFields.add(field); | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 // Look up static field(s) first to mimic the JDI implementation | |
| 112 Map map; | |
| 113 if (staticFields.size() > 0) { | |
| 114 map = referenceType().getValues(staticFields); | |
| 115 } else { | |
| 116 map = new HashMap(size); | |
| 117 } | |
| 118 | |
| 119 // Then get instance field(s) | |
| 120 size = instanceFields.size(); | |
| 121 for (int ii=0; ii<size; ii++){ | |
| 122 FieldImpl fieldImpl = (FieldImpl)instanceFields.get(ii); | |
| 123 map.put(fieldImpl, fieldImpl.getValue(saObject)); | |
| 124 } | |
| 125 | |
| 126 return map; | |
| 127 } | |
| 128 | |
| 129 public void setValue(Field field, Value value) | |
| 130 throws InvalidTypeException, ClassNotLoadedException { | |
| 131 vm.throwNotReadOnlyException("ObjectReference.setValue(...)"); | |
| 132 } | |
| 133 | |
| 134 public Value invokeMethod(ThreadReference threadIntf, Method methodIntf, | |
| 135 List arguments, int options) | |
| 136 throws InvalidTypeException, | |
| 137 IncompatibleThreadStateException, | |
| 138 InvocationException, | |
| 139 ClassNotLoadedException { | |
| 140 vm.throwNotReadOnlyException("ObjectReference.invokeMethod(...)"); | |
| 141 return null; | |
| 142 } | |
| 143 | |
| 144 public void disableCollection() { | |
| 145 vm.throwNotReadOnlyException("ObjectReference.disableCollection()"); | |
| 146 } | |
| 147 | |
| 148 public void enableCollection() { | |
| 149 vm.throwNotReadOnlyException("ObjectReference.enableCollection()"); | |
| 150 } | |
| 151 | |
| 152 public boolean isCollected() { | |
| 153 vm.throwNotReadOnlyException("ObjectReference.isCollected()"); | |
| 154 return false; | |
| 155 } | |
| 156 | |
| 157 public long uniqueID() { | |
| 158 return myID; | |
| 159 } | |
| 160 | |
| 161 public List waitingThreads() throws IncompatibleThreadStateException { | |
| 162 if (vm.canGetMonitorInfo() == false) { | |
| 163 throw new UnsupportedOperationException(); | |
| 164 } | |
| 165 | |
| 166 if (! monitorInfoCached) { | |
| 167 computeMonitorInfo(); | |
| 168 } | |
| 169 return waitingThreads; | |
| 170 } | |
| 171 | |
| 172 | |
| 173 public ThreadReference owningThread() throws IncompatibleThreadStateException { | |
| 174 if (vm.canGetMonitorInfo() == false) { | |
| 175 throw new UnsupportedOperationException(); | |
| 176 } | |
| 177 | |
| 178 if (! monitorInfoCached) { | |
| 179 computeMonitorInfo(); | |
| 180 } | |
| 181 return owningThread; | |
| 182 } | |
| 183 | |
| 184 | |
| 185 public int entryCount() throws IncompatibleThreadStateException { | |
| 186 if (vm.canGetMonitorInfo() == false) { | |
| 187 throw new UnsupportedOperationException(); | |
| 188 } | |
| 189 | |
| 190 if (! monitorInfoCached) { | |
| 191 computeMonitorInfo(); | |
| 192 } | |
| 193 return entryCount; | |
| 194 } | |
| 195 | |
| 196 // new method since 1.6. | |
| 197 // Real body will be supplied later. | |
| 198 public List referringObjects(long maxReferrers) { | |
| 199 if (!vm.canGetInstanceInfo()) { | |
| 200 throw new UnsupportedOperationException( | |
| 201 "target does not support getting instances"); | |
| 202 } | |
| 203 if (maxReferrers < 0) { | |
| 204 throw new IllegalArgumentException("maxReferrers is less than zero: " | |
| 205 + maxReferrers); | |
| 206 } | |
| 207 final ObjectReference obj = this; | |
| 208 final List objects = new ArrayList(0); | |
| 209 final long max = maxReferrers; | |
| 210 vm.saObjectHeap().iterate(new DefaultHeapVisitor() { | |
| 211 private long refCount = 0; | |
| 212 public boolean doObj(Oop oop) { | |
| 213 try { | |
| 214 ObjectReference objref = vm.objectMirror(oop); | |
| 215 List fields = objref.referenceType().allFields(); | |
| 216 for (int i=0; i < fields.size(); i++) { | |
| 217 Field fld = (Field)fields.get(i); | |
| 218 if (objref.getValue(fld).equals(obj) && !objects.contains(objref)) { | |
| 219 objects.add(objref); | |
| 220 refCount++; | |
| 221 } | |
| 222 } | |
| 223 if (max > 0 && refCount >= max) { | |
| 224 return true; | |
| 225 } | |
| 226 } catch (RuntimeException x) { | |
| 227 // Ignore RuntimeException thrown from vm.objectMirror(oop) | |
| 228 // for bad oop. It is possible to see some bad oop | |
| 229 // because heap might be iterating at no safepoint. | |
| 230 } | |
| 231 return false; | |
| 232 | |
| 233 } | |
| 234 }); | |
| 235 return objects; | |
| 236 } | |
| 237 | |
| 238 // refer to JvmtiEnvBase::count_locked_objects. | |
| 239 // Count the number of objects for a lightweight monitor. The obj | |
| 240 // parameter is object that owns the monitor so this routine will | |
| 241 // count the number of times the same object was locked by frames | |
| 242 // in JavaThread. i.e., we count total number of times the same | |
| 243 // object is (lightweight) locked by given thread. | |
| 244 private int countLockedObjects(JavaThread jt, Oop obj) { | |
| 245 int res = 0; | |
| 246 JavaVFrame frame = jt.getLastJavaVFrameDbg(); | |
| 247 while (frame != null) { | |
| 248 List monitors = frame.getMonitors(); | |
| 249 OopHandle givenHandle = obj.getHandle(); | |
| 250 for (Iterator itr = monitors.iterator(); itr.hasNext();) { | |
| 251 MonitorInfo mi = (MonitorInfo) itr.next(); | |
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b109e761e927
6837472: com/sun/jdi/MonitorFrameInfo.java fails with AggressiveOpts in 6u14
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changeset
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252 if (mi.eliminated() && frame.isCompiledFrame()) continue; // skip eliminated monitor |
| 0 | 253 if (givenHandle.equals(mi.owner())) { |
| 254 res++; | |
| 255 } | |
| 256 } | |
| 257 frame = (JavaVFrame) frame.javaSender(); | |
| 258 } | |
| 259 return res; | |
| 260 } | |
| 261 | |
| 262 // wrappers on same named method of Threads class | |
| 263 // returns List<JavaThread> | |
| 264 private List getPendingThreads(ObjectMonitor mon) { | |
| 265 return vm.saVM().getThreads().getPendingThreads(mon); | |
| 266 } | |
| 267 | |
| 268 // returns List<JavaThread> | |
| 269 private List getWaitingThreads(ObjectMonitor mon) { | |
| 270 return vm.saVM().getThreads().getWaitingThreads(mon); | |
| 271 } | |
| 272 | |
| 273 private JavaThread owningThreadFromMonitor(Address addr) { | |
| 274 return vm.saVM().getThreads().owningThreadFromMonitor(addr); | |
| 275 } | |
| 276 | |
| 277 // refer to JvmtiEnv::GetObjectMonitorUsage | |
| 278 private void computeMonitorInfo() { | |
| 279 monitorInfoCached = true; | |
| 280 Mark mark = saObject.getMark(); | |
| 281 ObjectMonitor mon = null; | |
| 282 Address owner = null; | |
| 283 // check for heavyweight monitor | |
| 284 if (! mark.hasMonitor()) { | |
| 285 // check for lightweight monitor | |
| 286 if (mark.hasLocker()) { | |
| 287 owner = mark.locker().getAddress(); // save the address of the Lock word | |
| 288 } | |
| 289 // implied else: no owner | |
| 290 } else { | |
| 291 // this object has a heavyweight monitor | |
| 292 mon = mark.monitor(); | |
| 293 | |
| 294 // The owner field of a heavyweight monitor may be NULL for no | |
| 295 // owner, a JavaThread * or it may still be the address of the | |
| 296 // Lock word in a JavaThread's stack. A monitor can be inflated | |
| 297 // by a non-owning JavaThread, but only the owning JavaThread | |
| 298 // can change the owner field from the Lock word to the | |
| 299 // JavaThread * and it may not have done that yet. | |
| 300 owner = mon.owner(); | |
| 301 } | |
| 302 | |
| 303 // find the owning thread | |
| 304 if (owner != null) { | |
| 305 owningThread = vm.threadMirror(owningThreadFromMonitor(owner)); | |
| 306 } | |
| 307 | |
| 308 // compute entryCount | |
| 309 if (owningThread != null) { | |
| 310 if (owningThread.getJavaThread().getAddress().equals(owner)) { | |
| 311 // the owner field is the JavaThread * | |
| 312 if (Assert.ASSERTS_ENABLED) { | |
| 313 Assert.that(false, "must have heavyweight monitor with JavaThread * owner"); | |
| 314 } | |
| 315 entryCount = (int) mark.monitor().recursions() + 1; | |
| 316 } else { | |
| 317 // The owner field is the Lock word on the JavaThread's stack | |
| 318 // so the recursions field is not valid. We have to count the | |
| 319 // number of recursive monitor entries the hard way. | |
| 320 entryCount = countLockedObjects(owningThread.getJavaThread(), saObject); | |
| 321 } | |
| 322 } | |
| 323 | |
| 324 // find the contenders & waiters | |
| 325 waitingThreads = new ArrayList(); | |
| 326 if (mon != null) { | |
| 327 // this object has a heavyweight monitor. threads could | |
| 328 // be contenders or waiters | |
| 329 // add all contenders | |
| 330 List pendingThreads = getPendingThreads(mon); | |
| 331 // convert the JavaThreads to ThreadReferenceImpls | |
| 332 for (Iterator itrPend = pendingThreads.iterator(); itrPend.hasNext();) { | |
| 333 waitingThreads.add(vm.threadMirror((JavaThread) itrPend.next())); | |
| 334 } | |
| 335 | |
| 336 // add all waiters (threads in Object.wait()) | |
| 337 // note that we don't do this JVMTI way. To do it JVMTI way, | |
| 338 // we would need to access ObjectWaiter list maintained in | |
| 339 // ObjectMonitor::_queue. But we don't have this struct exposed | |
| 340 // in vmStructs. We do waiters list in a way similar to getting | |
| 341 // pending threads list | |
| 342 List objWaitingThreads = getWaitingThreads(mon); | |
| 343 // convert the JavaThreads to ThreadReferenceImpls | |
| 344 for (Iterator itrWait = objWaitingThreads.iterator(); itrWait.hasNext();) { | |
| 345 waitingThreads.add(vm.threadMirror((JavaThread) itrWait.next())); | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 public boolean equals(Object obj) { | |
| 351 if ((obj != null) && (obj instanceof ObjectReferenceImpl)) { | |
| 352 ObjectReferenceImpl other = (ObjectReferenceImpl)obj; | |
| 353 return (ref().equals(other.ref())) && | |
| 354 super.equals(obj); | |
| 355 } else { | |
| 356 return false; | |
| 357 } | |
| 358 } | |
| 359 | |
| 360 public int hashCode() { | |
| 361 return saObject.hashCode(); | |
| 362 } | |
| 363 | |
| 364 public String toString() { | |
| 365 return "instance of " + referenceType().name() + "(id=" + uniqueID() + ")"; | |
| 366 } | |
| 367 } |