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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 2008, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | + | |
| 27 | +/* | |
| 28 | + * The Original Code is HAT. The Initial Developer of the | |
| 29 | + * Original Code is Bill Foote, with contributions from others | |
| 30 | + * at JavaSoft/Sun. | |
| 31 | + */ | |
| 32 | + | |
| 33 | +package com.sun.tools.hat.internal.model; | |
| 34 | + | |
| 35 | +import java.util.Vector; | |
| 36 | +import java.util.Enumeration; | |
| 37 | +import com.sun.tools.hat.internal.util.CompositeEnumeration; | |
| 38 | +import com.sun.tools.hat.internal.parser.ReadBuffer; | |
| 39 | + | |
| 40 | +/** | |
| 41 | + * | |
| 42 | + * @author Bill Foote | |
| 43 | + */ | |
| 44 | + | |
| 45 | + | |
| 46 | +public class JavaClass extends JavaHeapObject { | |
| 47 | + // my id | |
| 48 | + private long id; | |
| 49 | + // my name | |
| 50 | + private String name; | |
| 51 | + | |
| 52 | + // These are JavaObjectRef before resolve | |
| 53 | + private JavaThing superclass; | |
| 54 | + private JavaThing loader; | |
| 55 | + private JavaThing signers; | |
| 56 | + private JavaThing protectionDomain; | |
| 57 | + | |
| 58 | + // non-static fields | |
| 59 | + private JavaField[] fields; | |
| 60 | + // static fields | |
| 61 | + private JavaStatic[] statics; | |
| 62 | + | |
| 63 | + private static final JavaClass[] EMPTY_CLASS_ARRAY = new JavaClass[0]; | |
| 64 | + // my subclasses | |
| 65 | + private JavaClass[] subclasses = EMPTY_CLASS_ARRAY; | |
| 66 | + | |
| 67 | + // my instances | |
| 68 | + private Vector<JavaHeapObject> instances = new Vector<JavaHeapObject>(); | |
| 69 | + | |
| 70 | + // Who I belong to. Set on resolve. | |
| 71 | + private Snapshot mySnapshot; | |
| 72 | + | |
| 73 | + // Size of an instance, including VM overhead | |
| 74 | + private int instanceSize; | |
| 75 | + // Total number of fields including inherited ones | |
| 76 | + private int totalNumFields; | |
| 77 | + | |
| 78 | + | |
| 79 | + public JavaClass(long id, String name, long superclassId, long loaderId, | |
| 80 | + long signersId, long protDomainId, | |
| 81 | + JavaField[] fields, JavaStatic[] statics, | |
| 82 | + int instanceSize) { | |
| 83 | + this.id = id; | |
| 84 | + this.name = name; | |
| 85 | + this.superclass = new JavaObjectRef(superclassId); | |
| 86 | + this.loader = new JavaObjectRef(loaderId); | |
| 87 | + this.signers = new JavaObjectRef(signersId); | |
| 88 | + this.protectionDomain = new JavaObjectRef(protDomainId); | |
| 89 | + this.fields = fields; | |
| 90 | + this.statics = statics; | |
| 91 | + this.instanceSize = instanceSize; | |
| 92 | + } | |
| 93 | + | |
| 94 | + public JavaClass(String name, long superclassId, long loaderId, | |
| 95 | + long signersId, long protDomainId, | |
| 96 | + JavaField[] fields, JavaStatic[] statics, | |
| 97 | + int instanceSize) { | |
| 98 | + this(-1L, name, superclassId, loaderId, signersId, | |
| 99 | + protDomainId, fields, statics, instanceSize); | |
| 100 | + } | |
| 101 | + | |
| 102 | + public final JavaClass getClazz() { | |
| 103 | + return mySnapshot.getJavaLangClass(); | |
| 104 | + } | |
| 105 | + | |
| 106 | + public final int getIdentifierSize() { | |
| 107 | + return mySnapshot.getIdentifierSize(); | |
| 108 | + } | |
| 109 | + | |
| 110 | + public final int getMinimumObjectSize() { | |
| 111 | + return mySnapshot.getMinimumObjectSize(); | |
| 112 | + } | |
| 113 | + | |
| 114 | + public void resolve(Snapshot snapshot) { | |
| 115 | + if (mySnapshot != null) { | |
| 116 | + return; | |
| 117 | + } | |
| 118 | + mySnapshot = snapshot; | |
| 119 | + resolveSuperclass(snapshot); | |
| 120 | + if (superclass != null) { | |
| 121 | + ((JavaClass) superclass).addSubclass(this); | |
| 122 | + } | |
| 123 | + | |
| 124 | + loader = loader.dereference(snapshot, null); | |
| 125 | + signers = signers.dereference(snapshot, null); | |
| 126 | + protectionDomain = protectionDomain.dereference(snapshot, null); | |
| 127 | + | |
| 128 | + for (int i = 0; i < statics.length; i++) { | |
| 129 | + statics[i].resolve(this, snapshot); | |
| 130 | + } | |
| 131 | + snapshot.getJavaLangClass().addInstance(this); | |
| 132 | + super.resolve(snapshot); | |
| 133 | + return; | |
| 134 | + } | |
| 135 | + | |
| 136 | + /** | |
| 137 | + * Resolve our superclass. This might be called well before | |
| 138 | + * all instances are available (like when reading deferred | |
| 139 | + * instances in a 1.2 dump file :-) Calling this is sufficient | |
| 140 | + * to be able to explore this class' fields. | |
| 141 | + */ | |
| 142 | + public void resolveSuperclass(Snapshot snapshot) { | |
| 143 | + if (superclass == null) { | |
| 144 | + // We must be java.lang.Object, so we have no superclass. | |
| 145 | + } else { | |
| 146 | + totalNumFields = fields.length; | |
| 147 | + superclass = superclass.dereference(snapshot, null); | |
| 148 | + if (superclass == snapshot.getNullThing()) { | |
| 149 | + superclass = null; | |
| 150 | + } else { | |
| 151 | + try { | |
| 152 | + JavaClass sc = (JavaClass) superclass; | |
| 153 | + sc.resolveSuperclass(snapshot); | |
| 154 | + totalNumFields += sc.totalNumFields; | |
| 155 | + } catch (ClassCastException ex) { | |
| 156 | + System.out.println("Warning! Superclass of " + name + " is " + superclass); | |
| 157 | + superclass = null; | |
| 158 | + } | |
| 159 | + } | |
| 160 | + } | |
| 161 | + } | |
| 162 | + | |
| 163 | + public boolean isString() { | |
| 164 | + return mySnapshot.getJavaLangString() == this; | |
| 165 | + } | |
| 166 | + | |
| 167 | + public boolean isClassLoader() { | |
| 168 | + return mySnapshot.getJavaLangClassLoader().isAssignableFrom(this); | |
| 169 | + } | |
| 170 | + | |
| 171 | + /** | |
| 172 | + * Get a numbered field from this class | |
| 173 | + */ | |
| 174 | + public JavaField getField(int i) { | |
| 175 | + if (i < 0 || i >= fields.length) { | |
| 176 | + throw new Error("No field " + i + " for " + name); | |
| 177 | + } | |
| 178 | + return fields[i]; | |
| 179 | + } | |
| 180 | + | |
| 181 | + /** | |
| 182 | + * Get the total number of fields that are part of an instance of | |
| 183 | + * this class. That is, include superclasses. | |
| 184 | + */ | |
| 185 | + public int getNumFieldsForInstance() { | |
| 186 | + return totalNumFields; | |
| 187 | + } | |
| 188 | + | |
| 189 | + /** | |
| 190 | + * Get a numbered field from all the fields that are part of instance | |
| 191 | + * of this class. That is, include superclasses. | |
| 192 | + */ | |
| 193 | + public JavaField getFieldForInstance(int i) { | |
| 194 | + if (superclass != null) { | |
| 195 | + JavaClass sc = (JavaClass) superclass; | |
| 196 | + if (i < sc.totalNumFields) { | |
| 197 | + return sc.getFieldForInstance(i); | |
| 198 | + } | |
| 199 | + i -= sc.totalNumFields; | |
| 200 | + } | |
| 201 | + return getField(i); | |
| 202 | + } | |
| 203 | + | |
| 204 | + /** | |
| 205 | + * Get the class responsible for field i, where i is a field number that | |
| 206 | + * could be passed into getFieldForInstance. | |
| 207 | + * | |
| 208 | + * @see JavaClass.getFieldForInstance() | |
| 209 | + */ | |
| 210 | + public JavaClass getClassForField(int i) { | |
| 211 | + if (superclass != null) { | |
| 212 | + JavaClass sc = (JavaClass) superclass; | |
| 213 | + if (i < sc.totalNumFields) { | |
| 214 | + return sc.getClassForField(i); | |
| 215 | + } | |
| 216 | + } | |
| 217 | + return this; | |
| 218 | + } | |
| 219 | + | |
| 220 | + public long getId() { | |
| 221 | + return id; | |
| 222 | + } | |
| 223 | + | |
| 224 | + public String getName() { | |
| 225 | + return name; | |
| 226 | + } | |
| 227 | + | |
| 228 | + public boolean isArray() { | |
| 229 | + return name.indexOf('[') != -1; | |
| 230 | + } | |
| 231 | + | |
| 232 | + public Enumeration getInstances(boolean includeSubclasses) { | |
| 233 | + if (includeSubclasses) { | |
| 234 | + Enumeration res = instances.elements(); | |
| 235 | + for (int i = 0; i < subclasses.length; i++) { | |
| 236 | + res = new CompositeEnumeration(res, | |
| 237 | + subclasses[i].getInstances(true)); | |
| 238 | + } | |
| 239 | + return res; | |
| 240 | + } else { | |
| 241 | + return instances.elements(); | |
| 242 | + } | |
| 243 | + } | |
| 244 | + | |
| 245 | + /** | |
| 246 | + * @return a count of the instances of this class | |
| 247 | + */ | |
| 248 | + public int getInstancesCount(boolean includeSubclasses) { | |
| 249 | + int result = instances.size(); | |
| 250 | + if (includeSubclasses) { | |
| 251 | + for (int i = 0; i < subclasses.length; i++) { | |
| 252 | + result += subclasses[i].getInstancesCount(includeSubclasses); | |
| 253 | + } | |
| 254 | + } | |
| 255 | + return result; | |
| 256 | + } | |
| 257 | + | |
| 258 | + public JavaClass[] getSubclasses() { | |
| 259 | + return subclasses; | |
| 260 | + } | |
| 261 | + | |
| 262 | + /** | |
| 263 | + * This can only safely be called after resolve() | |
| 264 | + */ | |
| 265 | + public JavaClass getSuperclass() { | |
| 266 | + return (JavaClass) superclass; | |
| 267 | + } | |
| 268 | + | |
| 269 | + /** | |
| 270 | + * This can only safely be called after resolve() | |
| 271 | + */ | |
| 272 | + public JavaThing getLoader() { | |
| 273 | + return loader; | |
| 274 | + } | |
| 275 | + | |
| 276 | + /** | |
| 277 | + * This can only safely be called after resolve() | |
| 278 | + */ | |
| 279 | + public boolean isBootstrap() { | |
| 280 | + return loader == mySnapshot.getNullThing(); | |
| 281 | + } | |
| 282 | + | |
| 283 | + /** | |
| 284 | + * This can only safely be called after resolve() | |
| 285 | + */ | |
| 286 | + public JavaThing getSigners() { | |
| 287 | + return signers; | |
| 288 | + } | |
| 289 | + | |
| 290 | + /** | |
| 291 | + * This can only safely be called after resolve() | |
| 292 | + */ | |
| 293 | + public JavaThing getProtectionDomain() { | |
| 294 | + return protectionDomain; | |
| 295 | + } | |
| 296 | + | |
| 297 | + public JavaField[] getFields() { | |
| 298 | + return fields; | |
| 299 | + } | |
| 300 | + | |
| 301 | + /** | |
| 302 | + * Includes superclass fields | |
| 303 | + */ | |
| 304 | + public JavaField[] getFieldsForInstance() { | |
| 305 | + Vector<JavaField> v = new Vector<JavaField>(); | |
| 306 | + addFields(v); | |
| 307 | + JavaField[] result = new JavaField[v.size()]; | |
| 308 | + for (int i = 0; i < v.size(); i++) { | |
| 309 | + result[i] = v.elementAt(i); | |
| 310 | + } | |
| 311 | + return result; | |
| 312 | + } | |
| 313 | + | |
| 314 | + | |
| 315 | + public JavaStatic[] getStatics() { | |
| 316 | + return statics; | |
| 317 | + } | |
| 318 | + | |
| 319 | + // returns value of static field of given name | |
| 320 | + public JavaThing getStaticField(String name) { | |
| 321 | + for (int i = 0; i < statics.length; i++) { | |
| 322 | + JavaStatic s = statics[i]; | |
| 323 | + if (s.getField().getName().equals(name)) { | |
| 324 | + return s.getValue(); | |
| 325 | + } | |
| 326 | + } | |
| 327 | + return null; | |
| 328 | + } | |
| 329 | + | |
| 330 | + public String toString() { | |
| 331 | + return "class " + name; | |
| 332 | + } | |
| 333 | + | |
| 334 | + public int compareTo(JavaThing other) { | |
| 335 | + if (other instanceof JavaClass) { | |
| 336 | + return name.compareTo(((JavaClass) other).name); | |
| 337 | + } | |
| 338 | + return super.compareTo(other); | |
| 339 | + } | |
| 340 | + | |
| 341 | + | |
| 342 | + /** | |
| 343 | + * @return true iff a variable of type this is assignable from an instance | |
| 344 | + * of other | |
| 345 | + */ | |
| 346 | + public boolean isAssignableFrom(JavaClass other) { | |
| 347 | + if (this == other) { | |
| 348 | + return true; | |
| 349 | + } else if (other == null) { | |
| 350 | + return false; | |
| 351 | + } else { | |
| 352 | + return isAssignableFrom((JavaClass) other.superclass); | |
| 353 | + // Trivial tail recursion: I have faith in javac. | |
| 354 | + } | |
| 355 | + } | |
| 356 | + | |
| 357 | + /** | |
| 358 | + * Describe the reference that this thing has to target. This will only | |
| 359 | + * be called if target is in the array returned by getChildrenForRootset. | |
| 360 | + */ | |
| 361 | + public String describeReferenceTo(JavaThing target, Snapshot ss) { | |
| 362 | + for (int i = 0; i < statics.length; i++) { | |
| 363 | + JavaField f = statics[i].getField(); | |
| 364 | + if (f.hasId()) { | |
| 365 | + JavaThing other = statics[i].getValue(); | |
| 366 | + if (other == target) { | |
| 367 | + return "static field " + f.getName(); | |
| 368 | + } | |
| 369 | + } | |
| 370 | + } | |
| 371 | + return super.describeReferenceTo(target, ss); | |
| 372 | + } | |
| 373 | + | |
| 374 | + /** | |
| 375 | + * @return the size of an instance of this class. Gives 0 for an array | |
| 376 | + * type. | |
| 377 | + */ | |
| 378 | + public int getInstanceSize() { | |
| 379 | + return instanceSize + mySnapshot.getMinimumObjectSize(); | |
| 380 | + } | |
| 381 | + | |
| 382 | + | |
| 383 | + /** | |
| 384 | + * @return The size of all instances of this class. Correctly handles | |
| 385 | + * arrays. | |
| 386 | + */ | |
| 387 | + public long getTotalInstanceSize() { | |
| 388 | + int count = instances.size(); | |
| 389 | + if (count == 0 || !isArray()) { | |
| 390 | + return count * instanceSize; | |
| 391 | + } | |
| 392 | + | |
| 393 | + // array class and non-zero count, we have to | |
| 394 | + // get the size of each instance and sum it | |
| 395 | + long result = 0; | |
| 396 | + for (int i = 0; i < count; i++) { | |
| 397 | + JavaThing t = (JavaThing) instances.elementAt(i); | |
| 398 | + result += t.getSize(); | |
| 399 | + } | |
| 400 | + return result; | |
| 401 | + } | |
| 402 | + | |
| 403 | + /** | |
| 404 | + * @return the size of this object | |
| 405 | + */ | |
| 406 | + public int getSize() { | |
| 407 | + JavaClass cl = mySnapshot.getJavaLangClass(); | |
| 408 | + if (cl == null) { | |
| 409 | + return 0; | |
| 410 | + } else { | |
| 411 | + return cl.getInstanceSize(); | |
| 412 | + } | |
| 413 | + } | |
| 414 | + | |
| 415 | + public void visitReferencedObjects(JavaHeapObjectVisitor v) { | |
| 416 | + super.visitReferencedObjects(v); | |
| 417 | + JavaHeapObject sc = getSuperclass(); | |
| 418 | + if (sc != null) v.visit(getSuperclass()); | |
| 419 | + | |
| 420 | + JavaThing other; | |
| 421 | + other = getLoader(); | |
| 422 | + if (other instanceof JavaHeapObject) { | |
| 423 | + v.visit((JavaHeapObject)other); | |
| 424 | + } | |
| 425 | + other = getSigners(); | |
| 426 | + if (other instanceof JavaHeapObject) { | |
| 427 | + v.visit((JavaHeapObject)other); | |
| 428 | + } | |
| 429 | + other = getProtectionDomain(); | |
| 430 | + if (other instanceof JavaHeapObject) { | |
| 431 | + v.visit((JavaHeapObject)other); | |
| 432 | + } | |
| 433 | + | |
| 434 | + for (int i = 0; i < statics.length; i++) { | |
| 435 | + JavaField f = statics[i].getField(); | |
| 436 | + if (!v.exclude(this, f) && f.hasId()) { | |
| 437 | + other = statics[i].getValue(); | |
| 438 | + if (other instanceof JavaHeapObject) { | |
| 439 | + v.visit((JavaHeapObject) other); | |
| 440 | + } | |
| 441 | + } | |
| 442 | + } | |
| 443 | + } | |
| 444 | + | |
| 445 | + // package-privates below this point | |
| 446 | + final ReadBuffer getReadBuffer() { | |
| 447 | + return mySnapshot.getReadBuffer(); | |
| 448 | + } | |
| 449 | + | |
| 450 | + final void setNew(JavaHeapObject obj, boolean flag) { | |
| 451 | + mySnapshot.setNew(obj, flag); | |
| 452 | + } | |
| 453 | + | |
| 454 | + final boolean isNew(JavaHeapObject obj) { | |
| 455 | + return mySnapshot.isNew(obj); | |
| 456 | + } | |
| 457 | + | |
| 458 | + final StackTrace getSiteTrace(JavaHeapObject obj) { | |
| 459 | + return mySnapshot.getSiteTrace(obj); | |
| 460 | + } | |
| 461 | + | |
| 462 | + final void addReferenceFromRoot(Root root, JavaHeapObject obj) { | |
| 463 | + mySnapshot.addReferenceFromRoot(root, obj); | |
| 464 | + } | |
| 465 | + | |
| 466 | + final Root getRoot(JavaHeapObject obj) { | |
| 467 | + return mySnapshot.getRoot(obj); | |
| 468 | + } | |
| 469 | + | |
| 470 | + final Snapshot getSnapshot() { | |
| 471 | + return mySnapshot; | |
| 472 | + } | |
| 473 | + | |
| 474 | + void addInstance(JavaHeapObject inst) { | |
| 475 | + instances.addElement(inst); | |
| 476 | + } | |
| 477 | + | |
| 478 | + // Internals only below this point | |
| 479 | + private void addFields(Vector<JavaField> v) { | |
| 480 | + if (superclass != null) { | |
| 481 | + ((JavaClass) superclass).addFields(v); | |
| 482 | + } | |
| 483 | + for (int i = 0; i < fields.length; i++) { | |
| 484 | + v.addElement(fields[i]); | |
| 485 | + } | |
| 486 | + } | |
| 487 | + | |
| 488 | + private void addSubclassInstances(Vector<JavaHeapObject> v) { | |
| 489 | + for (int i = 0; i < subclasses.length; i++) { | |
| 490 | + subclasses[i].addSubclassInstances(v); | |
| 491 | + } | |
| 492 | + for (int i = 0; i < instances.size(); i++) { | |
| 493 | + v.addElement(instances.elementAt(i)); | |
| 494 | + } | |
| 495 | + } | |
| 496 | + | |
| 497 | + private void addSubclass(JavaClass sub) { | |
| 498 | + JavaClass newValue[] = new JavaClass[subclasses.length + 1]; | |
| 499 | + System.arraycopy(subclasses, 0, newValue, 0, subclasses.length); | |
| 500 | + newValue[subclasses.length] = sub; | |
| 501 | + subclasses = newValue; | |
| 502 | + } | |
| 503 | +} | |