Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/ObjectReader.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
| children | d8a240abb23a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2002, 2007, Oracle and/or its affiliates. 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.utilities; | |
| 26 | |
| 27 import java.lang.reflect.Modifier; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.oops.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 /** | |
| 35 * ObjectReader can "deserialize" objects from debuggee. | |
| 36 * | |
| 37 * Class Loading: | |
| 38 * | |
| 39 * ObjectReader loads classes using the given class loader. If no | |
| 40 * class loader is supplied, it uses a ProcImageClassLoader, which | |
| 41 * loads classes from debuggee core or process. | |
| 42 | |
| 43 * Object creation: | |
| 44 * | |
| 45 * This class uses no-arg constructor to construct objects. But if | |
| 46 * there is no no-arg constructor in a given class, then it tries to | |
| 47 * use other constructors with 'default' values - null for object | |
| 48 * types, 0, 0.0, false etc. for primitives. If this process fails to | |
| 49 * construct an instance (because of null checking by constructor or 0 | |
| 50 * being invalid for an int arg etc.), then null is returned. While | |
| 51 * constructing complete object graph 'null' is inserted silently on | |
| 52 * failure and the deserialization continues to construct best-effort | |
| 53 * object graph. | |
| 54 * | |
| 55 * Debug messages: | |
| 56 * | |
| 57 * The flag sun.jvm.hotspot.utilities.ObjectReader.DEBUG may be set to | |
| 58 * non-null to get debug error messages and stack traces. | |
| 59 * | |
| 60 * JDK version: | |
| 61 * | |
| 62 * JDK classes are loaded by bootstrap class loader and not by the | |
| 63 * supplied class loader or ProcImageClassLoader. This may create | |
| 64 * problems if a JDK class evolves. i.e., if SA runs a JDK version | |
| 65 * different from that of the debuggee, there is a possibility of | |
| 66 * schema change. It is recommended that the matching JDK version be | |
| 67 * used to run SA for proper object deserialization. | |
| 68 * | |
| 69 */ | |
| 70 | |
| 71 public class ObjectReader { | |
| 72 | |
| 73 private static final boolean DEBUG; | |
| 74 static { | |
| 75 DEBUG = System.getProperty("sun.jvm.hotspot.utilities.ObjectReader.DEBUG") != null; | |
| 76 } | |
| 77 | |
| 78 public ObjectReader(ClassLoader cl) { | |
| 79 this.cl = cl; | |
| 80 this.oopToObjMap = new HashMap(); | |
| 81 this.fieldMap = new HashMap(); | |
| 82 } | |
| 83 | |
| 84 public ObjectReader() { | |
| 85 this(new ProcImageClassLoader()); | |
| 86 } | |
| 87 | |
| 88 public Object readObject(Oop oop) throws ClassNotFoundException { | |
| 89 if (oop instanceof Instance) { | |
| 90 return readInstance((Instance) oop); | |
| 91 } else if (oop instanceof TypeArray){ | |
| 92 return readPrimitiveArray((TypeArray)oop); | |
| 93 } else if (oop instanceof ObjArray){ | |
| 94 return readObjectArray((ObjArray)oop); | |
| 95 } else { | |
| 96 return null; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 protected final Object getDefaultPrimitiveValue(Class clz) { | |
| 101 if (clz == Boolean.TYPE) { | |
| 102 return Boolean.FALSE; | |
| 103 } else if (clz == Character.TYPE) { | |
| 104 return new Character(' '); | |
| 105 } else if (clz == Byte.TYPE) { | |
| 106 return new Byte((byte) 0); | |
| 107 } else if (clz == Short.TYPE) { | |
| 108 return new Short((short) 0); | |
| 109 } else if (clz == Integer.TYPE) { | |
| 110 return new Integer(0); | |
| 111 } else if (clz == Long.TYPE) { | |
| 112 return new Long(0L); | |
| 113 } else if (clz == Float.TYPE) { | |
| 114 return new Float(0.0f); | |
| 115 } else if (clz == Double.TYPE) { | |
| 116 return new Double(0.0); | |
| 117 } else { | |
| 118 throw new RuntimeException("should not reach here!"); | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 protected Symbol javaLangString; | |
| 123 protected Symbol javaLangString() { | |
| 124 if (javaLangString == null) { | |
| 125 javaLangString = VM.getVM().getSymbolTable().probe("java/lang/String"); | |
| 126 } | |
| 127 return javaLangString; | |
| 128 } | |
| 129 | |
| 130 public Object readInstance(Instance oop) throws ClassNotFoundException { | |
| 131 Object result = getFromObjTable(oop); | |
| 132 if (result == null) { | |
| 133 InstanceKlass kls = (InstanceKlass) oop.getKlass(); | |
| 134 // Handle java.lang.String instances differently. As part of JSR-133, fields of immutable | |
| 135 // classes have been made final. The algorithm below will not be able to read Strings from | |
| 136 // debuggee (can't use reflection to set final fields). But, need to read Strings is very | |
| 137 // important. FIXME: need a framework to handle many other special cases. | |
| 138 if (kls.getName().equals(javaLangString())) { | |
| 139 return OopUtilities.stringOopToString(oop); | |
| 140 } | |
| 141 | |
| 142 Class clz = readClass(kls); | |
| 143 try { | |
| 144 result = clz.newInstance(); | |
| 145 } catch (Exception ex) { | |
| 146 // no-arg constructor failed to create object. Let us try | |
| 147 // to call constructors one-by-one with default arguments | |
| 148 // (null for objects, 0/0.0 etc. for primitives) till we | |
| 149 // succeed or fail on all constructors. | |
| 150 | |
| 151 java.lang.reflect.Constructor[] ctrs = clz.getDeclaredConstructors(); | |
| 152 for (int n = 0; n < ctrs.length; n++) { | |
| 153 java.lang.reflect.Constructor c = ctrs[n]; | |
| 154 Class[] paramTypes = c.getParameterTypes(); | |
| 155 Object[] params = new Object[paramTypes.length]; | |
| 156 for (int i = 0; i < params.length; i++) { | |
| 157 if (paramTypes[i].isPrimitive()) { | |
| 158 params[i] = getDefaultPrimitiveValue(paramTypes[i]); | |
| 159 } | |
| 160 } | |
| 161 try { | |
| 162 c.setAccessible(true); | |
| 163 result = c.newInstance(params); | |
| 164 break; | |
| 165 } catch (Exception exp) { | |
| 166 if (DEBUG) { | |
| 167 System.err.println("Can't create object using " + c); | |
| 168 exp.printStackTrace(); | |
| 169 } | |
| 170 } | |
| 171 } | |
| 172 } | |
| 173 | |
| 174 if (result != null) { | |
| 175 putIntoObjTable(oop, result); | |
| 176 oop.iterate(new FieldSetter(result), false); | |
| 177 } | |
| 178 } | |
| 179 return result; | |
| 180 } | |
| 181 | |
| 182 public Object readPrimitiveArray(final TypeArray array) { | |
| 183 | |
| 184 Object result = getFromObjTable(array); | |
| 185 if (result == null) { | |
| 186 int length = (int) array.getLength(); | |
| 187 TypeArrayKlass klass = (TypeArrayKlass) array.getKlass(); | |
| 188 int type = (int) klass.getElementType(); | |
| 189 switch (type) { | |
| 190 case TypeArrayKlass.T_BOOLEAN: { | |
| 191 final boolean[] arrayObj = new boolean[length]; | |
| 192 array.iterate(new DefaultOopVisitor() { | |
| 193 public void doBoolean(BooleanField field, boolean isVMField) { | |
| 194 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 195 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 196 } | |
| 197 }, false); | |
| 198 result = arrayObj; | |
| 199 } | |
| 200 break; | |
| 201 | |
| 202 case TypeArrayKlass.T_CHAR: { | |
| 203 final char[] arrayObj = new char[length]; | |
| 204 array.iterate(new DefaultOopVisitor() { | |
| 205 public void doChar(CharField field, boolean isVMField) { | |
| 206 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 207 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 208 } | |
| 209 }, false); | |
| 210 result = arrayObj; | |
| 211 } | |
| 212 break; | |
| 213 | |
| 214 case TypeArrayKlass.T_FLOAT: { | |
| 215 final float[] arrayObj = new float[length]; | |
| 216 array.iterate(new DefaultOopVisitor() { | |
| 217 public void doFloat(FloatField field, boolean isVMField) { | |
| 218 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 219 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 220 } | |
| 221 }, false); | |
| 222 result = arrayObj; | |
| 223 } | |
| 224 break; | |
| 225 | |
| 226 case TypeArrayKlass.T_DOUBLE: { | |
| 227 final double[] arrayObj = new double[length]; | |
| 228 array.iterate(new DefaultOopVisitor() { | |
| 229 public void doDouble(DoubleField field, boolean isVMField) { | |
| 230 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 231 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 232 } | |
| 233 }, false); | |
| 234 result = arrayObj; | |
| 235 } | |
| 236 break; | |
| 237 | |
| 238 case TypeArrayKlass.T_BYTE: { | |
| 239 final byte[] arrayObj = new byte[length]; | |
| 240 array.iterate(new DefaultOopVisitor() { | |
| 241 public void doByte(ByteField field, boolean isVMField) { | |
| 242 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 243 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 244 } | |
| 245 }, false); | |
| 246 result = arrayObj; | |
| 247 } | |
| 248 break; | |
| 249 | |
| 250 case TypeArrayKlass.T_SHORT: { | |
| 251 final short[] arrayObj = new short[length]; | |
| 252 array.iterate(new DefaultOopVisitor() { | |
| 253 public void doShort(ShortField field, boolean isVMField) { | |
| 254 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 255 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 256 } | |
| 257 }, false); | |
| 258 result = arrayObj; | |
| 259 } | |
| 260 break; | |
| 261 | |
| 262 case TypeArrayKlass.T_INT: { | |
| 263 final int[] arrayObj = new int[length]; | |
| 264 array.iterate(new DefaultOopVisitor() { | |
| 265 public void doInt(IntField field, boolean isVMField) { | |
| 266 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 267 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 268 } | |
| 269 }, false); | |
| 270 result = arrayObj; | |
| 271 } | |
| 272 break; | |
| 273 | |
| 274 case TypeArrayKlass.T_LONG: { | |
| 275 final long[] arrayObj = new long[length]; | |
| 276 array.iterate(new DefaultOopVisitor() { | |
| 277 public void doLong(LongField field, boolean isVMField) { | |
| 278 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 279 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 280 } | |
| 281 }, false); | |
| 282 result = arrayObj; | |
| 283 } | |
| 284 break; | |
| 285 | |
| 286 default: | |
| 287 throw new RuntimeException("should not reach here!"); | |
| 288 } | |
| 289 | |
| 290 putIntoObjTable(array, result); | |
| 291 } | |
| 292 return result; | |
| 293 } | |
| 294 | |
| 295 protected final boolean isRobust(OopHandle handle) { | |
| 296 return RobustOopDeterminator.oopLooksValid(handle); | |
| 297 } | |
| 298 | |
| 299 public Object readObjectArray(final ObjArray array) throws ClassNotFoundException { | |
| 300 Object result = getFromObjTable(array); | |
| 301 if (result == null) { | |
| 302 int length = (int) array.getLength(); | |
| 303 ObjArrayKlass klass = (ObjArrayKlass) array.getKlass(); | |
| 304 Klass bottomKls = klass.getBottomKlass(); | |
| 305 Class bottomCls = null; | |
| 306 final int dimension = (int) klass.getDimension(); | |
| 307 int[] dimArray = null; | |
| 308 if (bottomKls instanceof InstanceKlass) { | |
| 309 bottomCls = readClass((InstanceKlass) bottomKls); | |
| 310 dimArray = new int[dimension]; | |
| 311 } else { // instanceof TypeArrayKlass | |
| 312 TypeArrayKlass botKls = (TypeArrayKlass) bottomKls; | |
| 313 dimArray = new int[dimension -1]; | |
| 314 } | |
| 315 // initialize the length | |
| 316 dimArray[0] = length; | |
| 317 final Object[] arrayObj = (Object[]) java.lang.reflect.Array.newInstance(bottomCls, dimArray); | |
| 318 putIntoObjTable(array, arrayObj); | |
| 319 result = arrayObj; | |
| 320 array.iterate(new DefaultOopVisitor() { | |
| 321 public void doOop(OopField field, boolean isVMField) { | |
| 322 OopHandle handle = field.getValueAsOopHandle(getObj()); | |
| 323 if (! isRobust(handle)) { | |
| 324 return; | |
| 325 } | |
| 326 | |
| 327 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 328 try { | |
| 329 arrayObj[ifd.getIndex()] = readObject(field.getValue(getObj())); | |
| 330 } catch (Exception e) { | |
| 331 if (DEBUG) { | |
| 332 System.err.println("Array element set failed for " + ifd); | |
| 333 e.printStackTrace(); | |
| 334 } | |
| 335 } | |
| 336 } | |
| 337 }, false); | |
| 338 } | |
| 339 return result; | |
| 340 } | |
| 341 | |
| 342 protected class FieldSetter extends DefaultOopVisitor { | |
| 343 protected Object obj; | |
| 344 | |
| 345 public FieldSetter(Object obj) { | |
| 346 this.obj = obj; | |
| 347 } | |
| 348 | |
| 349 private void printFieldSetError(java.lang.reflect.Field f, Exception ex) { | |
| 350 if (DEBUG) { | |
| 351 if (f != null) System.err.println("Field set failed for " + f); | |
| 352 ex.printStackTrace(); | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 // Callback methods for each field type in an object | |
| 357 public void doOop(OopField field, boolean isVMField) { | |
| 358 OopHandle handle = field.getValueAsOopHandle(getObj()); | |
| 359 if (! isRobust(handle) ) { | |
| 360 return; | |
| 361 } | |
| 362 | |
| 363 java.lang.reflect.Field f = null; | |
| 364 try { | |
| 365 f = readField(field); | |
| 366 if (Modifier.isFinal(f.getModifiers())) return; | |
| 367 f.setAccessible(true); | |
| 368 f.set(obj, readObject(field.getValue(getObj()))); | |
| 369 } catch (Exception ex) { | |
| 370 printFieldSetError(f, ex); | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 public void doByte(ByteField field, boolean isVMField) { | |
| 375 java.lang.reflect.Field f = null; | |
| 376 try { | |
| 377 f = readField(field); | |
| 378 if (Modifier.isFinal(f.getModifiers())) return; | |
| 379 f.setAccessible(true); | |
| 380 f.setByte(obj, field.getValue(getObj())); | |
| 381 } catch (Exception ex) { | |
| 382 printFieldSetError(f, ex); | |
| 383 } | |
| 384 } | |
| 385 | |
| 386 public void doChar(CharField field, boolean isVMField) { | |
| 387 java.lang.reflect.Field f = null; | |
| 388 try { | |
| 389 f = readField(field); | |
| 390 if (Modifier.isFinal(f.getModifiers())) return; | |
| 391 f.setAccessible(true); | |
| 392 f.setChar(obj, field.getValue(getObj())); | |
| 393 } catch (Exception ex) { | |
| 394 printFieldSetError(f, ex); | |
| 395 } | |
| 396 } | |
| 397 | |
| 398 public void doBoolean(BooleanField field, boolean isVMField) { | |
| 399 java.lang.reflect.Field f = null; | |
| 400 try { | |
| 401 f = readField(field); | |
| 402 if (Modifier.isFinal(f.getModifiers())) return; | |
| 403 f.setAccessible(true); | |
| 404 f.setBoolean(obj, field.getValue(getObj())); | |
| 405 } catch (Exception ex) { | |
| 406 printFieldSetError(f, ex); | |
| 407 } | |
| 408 } | |
| 409 | |
| 410 public void doShort(ShortField field, boolean isVMField) { | |
| 411 java.lang.reflect.Field f = null; | |
| 412 try { | |
| 413 f = readField(field); | |
| 414 if (Modifier.isFinal(f.getModifiers())) return; | |
| 415 f.setAccessible(true); | |
| 416 f.setShort(obj, field.getValue(getObj())); | |
| 417 } catch (Exception ex) { | |
| 418 printFieldSetError(f, ex); | |
| 419 } | |
| 420 } | |
| 421 | |
| 422 public void doInt(IntField field, boolean isVMField) { | |
| 423 java.lang.reflect.Field f = null; | |
| 424 try { | |
| 425 f = readField(field); | |
| 426 if (Modifier.isFinal(f.getModifiers())) return; | |
| 427 f.setAccessible(true); | |
| 428 f.setInt(obj, field.getValue(getObj())); | |
| 429 } catch (Exception ex) { | |
| 430 printFieldSetError(f, ex); | |
| 431 } | |
| 432 } | |
| 433 | |
| 434 public void doLong(LongField field, boolean isVMField) { | |
| 435 java.lang.reflect.Field f = null; | |
| 436 try { | |
| 437 f = readField(field); | |
| 438 if (Modifier.isFinal(f.getModifiers())) return; | |
| 439 f.setAccessible(true); | |
| 440 f.setLong(obj, field.getValue(getObj())); | |
| 441 } catch (Exception ex) { | |
| 442 printFieldSetError(f, ex); | |
| 443 } | |
| 444 } | |
| 445 | |
| 446 public void doFloat(FloatField field, boolean isVMField) { | |
| 447 java.lang.reflect.Field f = null; | |
| 448 try { | |
| 449 f = readField(field); | |
| 450 if (Modifier.isFinal(f.getModifiers())) return; | |
| 451 f.setAccessible(true); | |
| 452 f.setFloat(obj, field.getValue(getObj())); | |
| 453 } catch (Exception ex) { | |
| 454 printFieldSetError(f, ex); | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 public void doDouble(DoubleField field, boolean isVMField) { | |
| 459 java.lang.reflect.Field f = null; | |
| 460 try { | |
| 461 f = readField(field); | |
| 462 if (Modifier.isFinal(f.getModifiers())) return; | |
| 463 f.setAccessible(true); | |
| 464 f.setDouble(obj, field.getValue(getObj())); | |
| 465 } catch (Exception ex) { | |
| 466 printFieldSetError(f, ex); | |
| 467 } | |
| 468 } | |
| 469 | |
| 470 public void doCInt(CIntField field, boolean isVMField) { | |
| 471 throw new RuntimeException("should not reach here!"); | |
| 472 } | |
| 473 } | |
| 474 | |
| 475 public Class readClass(InstanceKlass kls) throws ClassNotFoundException { | |
| 476 Class cls = (Class) getFromObjTable(kls); | |
| 477 if (cls == null) { | |
| 478 cls = Class.forName(kls.getName().asString().replace('/', '.'), true, cl); | |
| 479 putIntoObjTable(kls, cls); | |
| 480 } | |
| 481 return cls; | |
| 482 } | |
| 483 | |
| 484 public Object readMethodOrConstructor(sun.jvm.hotspot.oops.Method m) | |
| 485 throws NoSuchMethodException, ClassNotFoundException { | |
| 486 String name = m.getName().asString(); | |
| 487 if (name.equals("<init>")) { | |
| 488 return readConstructor(m); | |
| 489 } else { | |
| 490 return readMethod(m); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 public java.lang.reflect.Method readMethod(sun.jvm.hotspot.oops.Method m) | |
| 495 throws NoSuchMethodException, ClassNotFoundException { | |
| 496 java.lang.reflect.Method result = (java.lang.reflect.Method) getFromObjTable(m); | |
| 497 if (result == null) { | |
| 498 Class clz = readClass((InstanceKlass)m.getMethodHolder()); | |
| 499 String name = m.getName().asString(); | |
| 500 Class[] paramTypes = getParamTypes(m.getSignature()); | |
| 501 result = clz.getMethod(name, paramTypes); | |
| 502 putIntoObjTable(m, result); | |
| 503 } | |
| 504 return result; | |
| 505 } | |
| 506 | |
| 507 public java.lang.reflect.Constructor readConstructor(sun.jvm.hotspot.oops.Method m) | |
| 508 throws NoSuchMethodException, ClassNotFoundException { | |
| 509 java.lang.reflect.Constructor result = (java.lang.reflect.Constructor) getFromObjTable(m); | |
| 510 if (result == null) { | |
| 511 Class clz = readClass((InstanceKlass)m.getMethodHolder()); | |
| 512 String name = m.getName().asString(); | |
| 513 Class[] paramTypes = getParamTypes(m.getSignature()); | |
| 514 result = clz.getDeclaredConstructor(paramTypes); | |
| 515 putIntoObjTable(m, result); | |
| 516 } | |
| 517 return result; | |
| 518 } | |
| 519 | |
| 520 public java.lang.reflect.Field readField(sun.jvm.hotspot.oops.Field f) | |
| 521 throws NoSuchFieldException, ClassNotFoundException { | |
| 522 java.lang.reflect.Field result = (java.lang.reflect.Field) fieldMap.get(f); | |
| 523 if (result == null) { | |
| 524 FieldIdentifier fieldId = f.getID(); | |
| 525 Class clz = readClass((InstanceKlass) f.getFieldHolder()); | |
| 526 String name = fieldId.getName(); | |
| 527 try { | |
| 528 result = clz.getField(name); | |
| 529 } catch (NoSuchFieldException nsfe) { | |
| 530 result = clz.getDeclaredField(name); | |
| 531 } | |
| 532 fieldMap.put(f, result); | |
| 533 } | |
| 534 return result; | |
| 535 } | |
| 536 | |
| 537 protected final ClassLoader cl; | |
| 538 protected Map oopToObjMap; // Map<Oop, Object> | |
| 539 protected Map fieldMap; // Map<sun.jvm.hotspot.oops.Field, java.lang.reflect.Field> | |
| 540 | |
| 541 protected void putIntoObjTable(Oop oop, Object obj) { | |
| 542 oopToObjMap.put(oop, obj); | |
| 543 } | |
| 544 | |
| 545 protected Object getFromObjTable(Oop oop) { | |
| 546 return oopToObjMap.get(oop); | |
| 547 } | |
| 548 | |
| 549 protected class SignatureParser extends SignatureIterator { | |
| 550 protected Vector tmp = new Vector(); // Vector<Class> | |
| 551 | |
| 552 public SignatureParser(Symbol s) { | |
| 553 super(s); | |
| 554 } | |
| 555 | |
| 556 public void doBool () { tmp.add(Boolean.TYPE); } | |
| 557 public void doChar () { tmp.add(Character.TYPE); } | |
| 558 public void doFloat () { tmp.add(Float.TYPE); } | |
| 559 public void doDouble() { tmp.add(Double.TYPE); } | |
| 560 public void doByte () { tmp.add(Byte.TYPE); } | |
| 561 public void doShort () { tmp.add(Short.TYPE); } | |
| 562 public void doInt () { tmp.add(Integer.TYPE); } | |
| 563 public void doLong () { tmp.add(Long.TYPE); } | |
| 564 public void doVoid () { | |
| 565 if(isReturnType()) { | |
| 566 tmp.add(Void.TYPE); | |
| 567 } else { | |
| 568 throw new RuntimeException("should not reach here"); | |
| 569 } | |
| 570 } | |
| 571 | |
| 572 public void doObject(int begin, int end) { | |
| 573 tmp.add(getClass(begin, end)); | |
| 574 } | |
| 575 | |
| 576 public void doArray (int begin, int end) { | |
| 577 int inner = arrayInnerBegin(begin); | |
| 578 Class elemCls = null; | |
| 579 switch (_signature.getByteAt(inner)) { | |
| 580 case 'B': elemCls = Boolean.TYPE; break; | |
| 581 case 'C': elemCls = Character.TYPE; break; | |
| 582 case 'D': elemCls = Double.TYPE; break; | |
| 583 case 'F': elemCls = Float.TYPE; break; | |
| 584 case 'I': elemCls = Integer.TYPE; break; | |
| 585 case 'J': elemCls = Long.TYPE; break; | |
| 586 case 'S': elemCls = Short.TYPE; break; | |
| 587 case 'Z': elemCls = Boolean.TYPE; break; | |
| 588 case 'L': elemCls = getClass(inner + 1, end); break; | |
| 589 default: break; | |
| 590 } | |
| 591 | |
| 592 int dimension = inner - begin; | |
| 593 // create 0 x 0 ... array and get class from that | |
| 594 int[] dimArray = new int[dimension]; | |
| 595 tmp.add(java.lang.reflect.Array.newInstance(elemCls, dimArray).getClass()); | |
| 596 } | |
| 597 | |
| 598 protected Class getClass(int begin, int end) { | |
| 599 String className = getClassName(begin, end); | |
| 600 try { | |
| 601 return Class.forName(className, true, cl); | |
| 602 } catch (Exception e) { | |
| 603 if (DEBUG) { | |
| 604 System.err.println("Can't load class " + className); | |
| 605 } | |
| 606 throw new RuntimeException(e); | |
| 607 } | |
| 608 } | |
| 609 | |
| 610 protected String getClassName(int begin, int end) { | |
| 611 StringBuffer buf = new StringBuffer(); | |
| 612 for (int i = begin; i < end; i++) { | |
| 613 char c = (char) (_signature.getByteAt(i) & 0xFF); | |
| 614 if (c == '/') { | |
| 615 buf.append('.'); | |
| 616 } else { | |
| 617 buf.append(c); | |
| 618 } | |
| 619 } | |
| 620 return buf.toString(); | |
| 621 } | |
| 622 | |
| 623 protected int arrayInnerBegin(int begin) { | |
| 624 while (_signature.getByteAt(begin) == '[') { | |
| 625 ++begin; | |
| 626 } | |
| 627 return begin; | |
| 628 } | |
| 629 | |
| 630 public int getNumParams() { | |
| 631 return tmp.size(); | |
| 632 } | |
| 633 | |
| 634 public Enumeration getParamTypes() { | |
| 635 return tmp.elements(); | |
| 636 } | |
| 637 } | |
| 638 | |
| 639 protected Class[] getParamTypes(Symbol signature) { | |
| 640 SignatureParser sp = new SignatureParser(signature); | |
| 641 sp.iterateParameters(); | |
| 642 Class result[] = new Class[sp.getNumParams()]; | |
| 643 Enumeration e = sp.getParamTypes(); | |
| 644 int i = 0; | |
| 645 while (e.hasMoreElements()) { | |
| 646 result[i] = (Class) e.nextElement(); | |
| 647 i++; | |
| 648 } | |
| 649 return result; | |
| 650 } | |
| 651 } |