Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPool.java @ 1602:136b78722a08
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
| author | jrose |
|---|---|
| date | Wed, 09 Jun 2010 18:50:45 -0700 |
| parents | c18cbe5936b8 |
| children | 083fde3b838e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2010, 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.oops; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
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34 // A ConstantPool is an oop containing class constants |
| 0 | 35 // as described in the class file |
| 36 | |
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37 public class ConstantPool extends Oop implements ClassConstants { |
| 0 | 38 // Used for debugging this code |
| 39 private static final boolean DEBUG = false; | |
| 40 | |
| 41 protected void debugMessage(String message) { | |
| 42 System.out.println(message); | |
| 43 } | |
| 44 | |
| 45 static { | |
| 46 VM.registerVMInitializedObserver(new Observer() { | |
| 47 public void update(Observable o, Object data) { | |
| 48 initialize(VM.getVM().getTypeDataBase()); | |
| 49 } | |
| 50 }); | |
| 51 } | |
| 52 | |
| 53 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
| 54 Type type = db.lookupType("constantPoolOopDesc"); | |
| 55 tags = new OopField(type.getOopField("_tags"), 0); | |
| 56 cache = new OopField(type.getOopField("_cache"), 0); | |
| 57 poolHolder = new OopField(type.getOopField("_pool_holder"), 0); | |
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58 length = new CIntField(type.getCIntegerField("_length"), 0); |
| 0 | 59 headerSize = type.getSize(); |
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60 elementSize = 0; |
| 0 | 61 } |
| 62 | |
| 63 ConstantPool(OopHandle handle, ObjectHeap heap) { | |
| 64 super(handle, heap); | |
| 65 } | |
| 66 | |
| 67 public boolean isConstantPool() { return true; } | |
| 68 | |
| 69 private static OopField tags; | |
| 70 private static OopField cache; | |
| 71 private static OopField poolHolder; | |
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72 private static CIntField length; // number of elements in oop |
| 0 | 73 |
| 74 private static long headerSize; | |
| 75 private static long elementSize; | |
| 76 | |
| 77 public TypeArray getTags() { return (TypeArray) tags.getValue(this); } | |
| 78 public ConstantPoolCache getCache() { return (ConstantPoolCache) cache.getValue(this); } | |
| 79 public Klass getPoolHolder() { return (Klass) poolHolder.getValue(this); } | |
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80 public int getLength() { return (int)length.getValue(this); } |
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81 |
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82 private long getElementSize() { |
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83 if (elementSize !=0 ) { |
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84 return elementSize; |
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85 } else { |
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86 elementSize = VM.getVM().getOopSize(); |
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87 } |
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88 return elementSize; |
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89 } |
| 0 | 90 |
| 91 private long indexOffset(long index) { | |
| 92 if (Assert.ASSERTS_ENABLED) { | |
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93 Assert.that(index > 0 && index < getLength(), "invalid cp index " + index + " " + getLength()); |
| 0 | 94 } |
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95 return (index * getElementSize()) + headerSize; |
| 0 | 96 } |
| 97 | |
| 98 public ConstantTag getTagAt(long index) { | |
| 99 return new ConstantTag(getTags().getByteAt((int) index)); | |
| 100 } | |
| 101 | |
| 102 public Oop getObjAt(long index){ | |
| 103 return getHeap().newOop(getHandle().getOopHandleAt(indexOffset(index))); | |
| 104 } | |
| 105 | |
| 106 public Symbol getSymbolAt(long index) { | |
| 107 return (Symbol) getObjAt(index); | |
| 108 } | |
| 109 | |
| 110 public int getIntAt(long index){ | |
| 111 return getHandle().getJIntAt(indexOffset(index)); | |
| 112 } | |
| 113 | |
| 114 public float getFloatAt(long index){ | |
| 115 return getHandle().getJFloatAt(indexOffset(index)); | |
| 116 } | |
| 117 | |
| 118 public long getLongAt(long index) { | |
| 119 int oneHalf = getHandle().getJIntAt(indexOffset(index + 1)); | |
| 120 int otherHalf = getHandle().getJIntAt(indexOffset(index)); | |
| 121 // buildLongFromIntsPD accepts higher address value, lower address value | |
| 122 // in that order. | |
| 123 return VM.getVM().buildLongFromIntsPD(oneHalf, otherHalf); | |
| 124 } | |
| 125 | |
| 126 public double getDoubleAt(long index) { | |
| 127 return Double.longBitsToDouble(getLongAt(index)); | |
| 128 } | |
| 129 | |
| 130 public int getFieldOrMethodAt(int which) { | |
| 131 if (DEBUG) { | |
| 132 System.err.print("ConstantPool.getFieldOrMethodAt(" + which + "): new index = "); | |
| 133 } | |
| 134 int i = -1; | |
| 135 ConstantPoolCache cache = getCache(); | |
| 136 if (cache == null) { | |
| 137 i = which; | |
| 138 } else { | |
| 139 // change byte-ordering and go via cache | |
| 140 i = cache.getEntryAt(0xFFFF & VM.getVM().getBytes().swapShort((short) which)).getConstantPoolIndex(); | |
| 141 } | |
| 142 if (Assert.ASSERTS_ENABLED) { | |
| 143 Assert.that(getTagAt(i).isFieldOrMethod(), "Corrupted constant pool"); | |
| 144 } | |
| 145 if (DEBUG) { | |
| 146 System.err.println(i); | |
| 147 } | |
| 148 int res = getIntAt(i); | |
| 149 if (DEBUG) { | |
| 150 System.err.println("ConstantPool.getFieldOrMethodAt(" + i + "): result = " + res); | |
| 151 } | |
| 152 return res; | |
| 153 } | |
| 154 | |
| 1602 | 155 public int[] getNameAndTypeAt(int which) { |
| 0 | 156 if (Assert.ASSERTS_ENABLED) { |
| 157 Assert.that(getTagAt(which).isNameAndType(), "Corrupted constant pool"); | |
| 158 } | |
| 159 int i = getIntAt(which); | |
| 160 if (DEBUG) { | |
| 161 System.err.println("ConstantPool.getNameAndTypeAt(" + which + "): result = " + i); | |
| 162 } | |
| 1602 | 163 return new int[] { extractLowShortFromInt(i), extractHighShortFromInt(i) }; |
| 0 | 164 } |
| 165 | |
| 166 public Symbol getNameRefAt(int which) { | |
| 1602 | 167 int nameIndex = getNameAndTypeAt(getNameAndTypeRefIndexAt(which))[0]; |
| 0 | 168 return getSymbolAt(nameIndex); |
| 169 } | |
| 170 | |
| 171 public Symbol getSignatureRefAt(int which) { | |
| 1602 | 172 int sigIndex = getNameAndTypeAt(getNameAndTypeRefIndexAt(which))[1]; |
| 0 | 173 return getSymbolAt(sigIndex); |
| 174 } | |
| 175 | |
| 176 // returns null, if not resolved. | |
| 177 public Klass getKlassRefAt(int which) { | |
| 178 if( ! getTagAt(which).isKlass()) return null; | |
| 179 return (Klass) getObjAt(which); | |
| 180 } | |
| 181 | |
| 182 // returns null, if not resolved. | |
| 183 public InstanceKlass getFieldOrMethodKlassRefAt(int which) { | |
| 184 int refIndex = getFieldOrMethodAt(which); | |
| 185 int klassIndex = extractLowShortFromInt(refIndex); | |
| 186 return (InstanceKlass) getKlassRefAt(klassIndex); | |
| 187 } | |
| 188 | |
| 189 // returns null, if not resolved. | |
| 190 public Method getMethodRefAt(int which) { | |
| 191 InstanceKlass klass = getFieldOrMethodKlassRefAt(which); | |
| 192 if (klass == null) return null; | |
| 193 Symbol name = getNameRefAt(which); | |
| 194 Symbol sig = getSignatureRefAt(which); | |
| 195 return klass.findMethod(name, sig); | |
| 196 } | |
| 197 | |
| 198 // returns null, if not resolved. | |
| 199 public Field getFieldRefAt(int which) { | |
| 200 InstanceKlass klass = getFieldOrMethodKlassRefAt(which); | |
| 201 if (klass == null) return null; | |
| 202 Symbol name = getNameRefAt(which); | |
| 203 Symbol sig = getSignatureRefAt(which); | |
| 204 return klass.findField(name, sig); | |
| 205 } | |
| 206 | |
| 207 public int getNameAndTypeRefIndexAt(int index) { | |
| 208 int refIndex = getFieldOrMethodAt(index); | |
| 209 if (DEBUG) { | |
| 210 System.err.println("ConstantPool.getNameAndTypeRefIndexAt(" + index + "): refIndex = " + refIndex); | |
| 211 } | |
| 212 int i = extractHighShortFromInt(refIndex); | |
| 213 if (DEBUG) { | |
| 214 System.err.println("ConstantPool.getNameAndTypeRefIndexAt(" + index + "): result = " + i); | |
| 215 } | |
| 216 return i; | |
| 217 } | |
| 218 | |
| 219 /** Lookup for entries consisting of (name_index, signature_index) */ | |
| 220 public int getNameRefIndexAt(int index) { | |
| 1602 | 221 int[] refIndex = getNameAndTypeAt(index); |
| 0 | 222 if (DEBUG) { |
| 1602 | 223 System.err.println("ConstantPool.getNameRefIndexAt(" + index + "): refIndex = " + refIndex[0]+"/"+refIndex[1]); |
| 0 | 224 } |
| 1602 | 225 int i = refIndex[0]; |
| 0 | 226 if (DEBUG) { |
| 227 System.err.println("ConstantPool.getNameRefIndexAt(" + index + "): result = " + i); | |
| 228 } | |
| 229 return i; | |
| 230 } | |
| 231 | |
| 232 /** Lookup for entries consisting of (name_index, signature_index) */ | |
| 233 public int getSignatureRefIndexAt(int index) { | |
| 1602 | 234 int[] refIndex = getNameAndTypeAt(index); |
| 0 | 235 if (DEBUG) { |
| 1602 | 236 System.err.println("ConstantPool.getSignatureRefIndexAt(" + index + "): refIndex = " + refIndex[0]+"/"+refIndex[1]); |
| 0 | 237 } |
| 1602 | 238 int i = refIndex[1]; |
| 0 | 239 if (DEBUG) { |
| 240 System.err.println("ConstantPool.getSignatureRefIndexAt(" + index + "): result = " + i); | |
| 241 } | |
| 242 return i; | |
| 243 } | |
| 244 | |
| 1602 | 245 /** Lookup for MethodHandle entries. */ |
| 246 public int getMethodHandleIndexAt(int i) { | |
| 247 if (Assert.ASSERTS_ENABLED) { | |
| 248 Assert.that(getTagAt(i).isMethodHandle(), "Corrupted constant pool"); | |
| 249 } | |
| 250 int res = extractHighShortFromInt(getIntAt(i)); | |
| 251 if (DEBUG) { | |
| 252 System.err.println("ConstantPool.getMethodHandleIndexAt(" + i + "): result = " + res); | |
| 253 } | |
| 254 return res; | |
| 255 } | |
| 256 | |
| 257 /** Lookup for MethodHandle entries. */ | |
| 258 public int getMethodHandleRefKindAt(int i) { | |
| 259 if (Assert.ASSERTS_ENABLED) { | |
| 260 Assert.that(getTagAt(i).isMethodHandle(), "Corrupted constant pool"); | |
| 261 } | |
| 262 int res = extractLowShortFromInt(getIntAt(i)); | |
| 263 if (DEBUG) { | |
| 264 System.err.println("ConstantPool.getMethodHandleRefKindAt(" + i + "): result = " + res); | |
| 265 } | |
| 266 return res; | |
| 267 } | |
| 268 | |
| 269 /** Lookup for MethodType entries. */ | |
| 270 public int getMethodTypeIndexAt(int i) { | |
| 271 if (Assert.ASSERTS_ENABLED) { | |
| 272 Assert.that(getTagAt(i).isMethodType(), "Corrupted constant pool"); | |
| 273 } | |
| 274 int res = getIntAt(i); | |
| 275 if (DEBUG) { | |
| 276 System.err.println("ConstantPool.getMethodHandleTypeAt(" + i + "): result = " + res); | |
| 277 } | |
| 278 return res; | |
| 279 } | |
| 280 | |
| 0 | 281 final private static String[] nameForTag = new String[] { |
| 282 }; | |
| 283 | |
| 284 private String nameForTag(int tag) { | |
| 285 switch (tag) { | |
| 286 case JVM_CONSTANT_Utf8: return "JVM_CONSTANT_Utf8"; | |
| 287 case JVM_CONSTANT_Unicode: return "JVM_CONSTANT_Unicode"; | |
| 288 case JVM_CONSTANT_Integer: return "JVM_CONSTANT_Integer"; | |
| 289 case JVM_CONSTANT_Float: return "JVM_CONSTANT_Float"; | |
| 290 case JVM_CONSTANT_Long: return "JVM_CONSTANT_Long"; | |
| 291 case JVM_CONSTANT_Double: return "JVM_CONSTANT_Double"; | |
| 292 case JVM_CONSTANT_Class: return "JVM_CONSTANT_Class"; | |
| 293 case JVM_CONSTANT_String: return "JVM_CONSTANT_String"; | |
| 294 case JVM_CONSTANT_Fieldref: return "JVM_CONSTANT_Fieldref"; | |
| 295 case JVM_CONSTANT_Methodref: return "JVM_CONSTANT_Methodref"; | |
| 296 case JVM_CONSTANT_InterfaceMethodref: return "JVM_CONSTANT_InterfaceMethodref"; | |
| 297 case JVM_CONSTANT_NameAndType: return "JVM_CONSTANT_NameAndType"; | |
| 1602 | 298 case JVM_CONSTANT_MethodHandle: return "JVM_CONSTANT_MethodHandle"; |
| 299 case JVM_CONSTANT_MethodType: return "JVM_CONSTANT_MethodType"; | |
| 0 | 300 case JVM_CONSTANT_Invalid: return "JVM_CONSTANT_Invalid"; |
| 301 case JVM_CONSTANT_UnresolvedClass: return "JVM_CONSTANT_UnresolvedClass"; | |
| 1385 | 302 case JVM_CONSTANT_UnresolvedClassInError: return "JVM_CONSTANT_UnresolvedClassInError"; |
| 0 | 303 case JVM_CONSTANT_ClassIndex: return "JVM_CONSTANT_ClassIndex"; |
| 304 case JVM_CONSTANT_UnresolvedString: return "JVM_CONSTANT_UnresolvedString"; | |
| 305 case JVM_CONSTANT_StringIndex: return "JVM_CONSTANT_StringIndex"; | |
| 306 } | |
| 1385 | 307 throw new InternalError("Unknown tag: " + tag); |
| 0 | 308 } |
| 309 | |
| 310 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
| 311 super.iterateFields(visitor, doVMFields); | |
| 312 if (doVMFields) { | |
| 313 visitor.doOop(tags, true); | |
| 314 visitor.doOop(cache, true); | |
| 315 visitor.doOop(poolHolder, true); | |
| 316 | |
| 317 final int length = (int) getLength(); | |
| 318 // zero'th pool entry is always invalid. ignore it. | |
| 319 for (int index = 1; index < length; index++) { | |
| 320 int ctag = (int) getTags().getByteAt((int) index); | |
| 321 switch (ctag) { | |
| 322 case JVM_CONSTANT_ClassIndex: | |
| 323 case JVM_CONSTANT_StringIndex: | |
| 324 case JVM_CONSTANT_Integer: | |
| 325 visitor.doInt(new IntField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); | |
| 326 break; | |
| 327 | |
| 328 case JVM_CONSTANT_Float: | |
| 329 visitor.doFloat(new FloatField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); | |
| 330 break; | |
| 331 | |
| 332 case JVM_CONSTANT_Long: | |
| 333 visitor.doLong(new LongField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); | |
| 334 // long entries occupy two slots | |
| 335 index++; | |
| 336 break; | |
| 337 | |
| 338 case JVM_CONSTANT_Double: | |
| 339 visitor.doDouble(new DoubleField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); | |
| 340 // double entries occupy two slots | |
| 341 index++; | |
| 342 break; | |
| 343 | |
| 1385 | 344 case JVM_CONSTANT_UnresolvedClassInError: |
| 0 | 345 case JVM_CONSTANT_UnresolvedClass: |
| 346 case JVM_CONSTANT_Class: | |
| 347 case JVM_CONSTANT_UnresolvedString: | |
| 348 case JVM_CONSTANT_Utf8: | |
| 349 visitor.doOop(new OopField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); | |
| 350 break; | |
| 351 | |
| 352 case JVM_CONSTANT_Fieldref: | |
| 353 case JVM_CONSTANT_Methodref: | |
| 354 case JVM_CONSTANT_InterfaceMethodref: | |
| 355 case JVM_CONSTANT_NameAndType: | |
| 1602 | 356 case JVM_CONSTANT_MethodHandle: |
| 357 case JVM_CONSTANT_MethodType: | |
| 0 | 358 visitor.doInt(new IntField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| 359 break; | |
| 360 } | |
| 361 } | |
| 362 } | |
| 363 /* | |
| 364 int length = getLength(); | |
| 365 for (int index = 0; index < length; index++) { | |
| 366 long offset = baseOffset + (index + typeDataBase.getOopSize()); | |
| 367 visitor.doOop(new IndexableField(index, offset, false), getObjAt(index)); | |
| 368 } | |
| 369 */ | |
| 370 } | |
| 371 | |
| 372 public void writeBytes(OutputStream os) throws IOException { | |
| 373 // Map between any modified UTF-8 and it's constant pool index. | |
| 374 Map utf8ToIndex = new HashMap(); | |
| 375 DataOutputStream dos = new DataOutputStream(os); | |
| 376 TypeArray tags = getTags(); | |
| 377 int len = (int)getLength(); | |
| 378 int ci = 0; // constant pool index | |
| 379 | |
| 380 // collect all modified UTF-8 Strings from Constant Pool | |
| 381 | |
| 382 for (ci = 1; ci < len; ci++) { | |
| 383 byte cpConstType = tags.getByteAt(ci); | |
| 384 if(cpConstType == JVM_CONSTANT_Utf8) { | |
| 385 Symbol sym = getSymbolAt(ci); | |
| 386 utf8ToIndex.put(sym.asString(), new Short((short) ci)); | |
| 387 } | |
| 388 else if(cpConstType == JVM_CONSTANT_Long || | |
| 389 cpConstType == JVM_CONSTANT_Double) { | |
| 390 ci++; | |
| 391 } | |
| 392 } | |
| 393 | |
| 394 | |
| 395 for(ci = 1; ci < len; ci++) { | |
| 396 int cpConstType = (int)tags.getByteAt(ci); | |
| 397 // write cp_info | |
| 398 // write constant type | |
| 399 switch(cpConstType) { | |
| 400 case JVM_CONSTANT_Utf8: { | |
| 401 dos.writeByte(cpConstType); | |
| 402 Symbol sym = getSymbolAt(ci); | |
| 403 dos.writeShort((short)sym.getLength()); | |
| 404 dos.write(sym.asByteArray()); | |
| 405 if (DEBUG) debugMessage("CP[" + ci + "] = modified UTF-8 " + sym.asString()); | |
| 406 break; | |
| 407 } | |
| 408 | |
| 409 case JVM_CONSTANT_Unicode: | |
| 410 throw new IllegalArgumentException("Unicode constant!"); | |
| 411 | |
| 412 case JVM_CONSTANT_Integer: | |
| 413 dos.writeByte(cpConstType); | |
| 414 dos.writeInt(getIntAt(ci)); | |
| 415 if (DEBUG) debugMessage("CP[" + ci + "] = int " + getIntAt(ci)); | |
| 416 break; | |
| 417 | |
| 418 case JVM_CONSTANT_Float: | |
| 419 dos.writeByte(cpConstType); | |
| 420 dos.writeFloat(getFloatAt(ci)); | |
| 421 if (DEBUG) debugMessage("CP[" + ci + "] = float " + getFloatAt(ci)); | |
| 422 break; | |
| 423 | |
| 424 case JVM_CONSTANT_Long: { | |
| 425 dos.writeByte(cpConstType); | |
| 426 long l = getLongAt(ci); | |
| 427 // long entries occupy two pool entries | |
| 428 ci++; | |
| 429 dos.writeLong(l); | |
| 430 break; | |
| 431 } | |
| 432 | |
| 433 case JVM_CONSTANT_Double: | |
| 434 dos.writeByte(cpConstType); | |
| 435 dos.writeDouble(getDoubleAt(ci)); | |
| 436 // double entries occupy two pool entries | |
| 437 ci++; | |
| 438 break; | |
| 439 | |
| 440 case JVM_CONSTANT_Class: { | |
| 441 dos.writeByte(cpConstType); | |
| 442 // Klass already resolved. ConstantPool constains klassOop. | |
| 443 Klass refKls = (Klass) getObjAt(ci); | |
| 444 String klassName = refKls.getName().asString(); | |
| 445 Short s = (Short) utf8ToIndex.get(klassName); | |
| 446 dos.writeShort(s.shortValue()); | |
| 447 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); | |
| 448 break; | |
| 449 } | |
| 450 | |
| 451 // case JVM_CONSTANT_ClassIndex: | |
| 1385 | 452 case JVM_CONSTANT_UnresolvedClassInError: |
| 0 | 453 case JVM_CONSTANT_UnresolvedClass: { |
| 454 dos.writeByte(JVM_CONSTANT_Class); | |
| 455 String klassName = getSymbolAt(ci).asString(); | |
| 456 Short s = (Short) utf8ToIndex.get(klassName); | |
| 457 dos.writeShort(s.shortValue()); | |
| 458 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); | |
| 459 break; | |
| 460 } | |
| 461 | |
| 462 case JVM_CONSTANT_String: { | |
| 463 dos.writeByte(cpConstType); | |
| 464 String str = OopUtilities.stringOopToString(getObjAt(ci)); | |
| 465 Short s = (Short) utf8ToIndex.get(str); | |
| 466 dos.writeShort(s.shortValue()); | |
| 467 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
| 468 break; | |
| 469 } | |
| 470 | |
| 471 // case JVM_CONSTANT_StringIndex: | |
| 472 case JVM_CONSTANT_UnresolvedString: { | |
| 473 dos.writeByte(JVM_CONSTANT_String); | |
| 474 String val = getSymbolAt(ci).asString(); | |
| 475 | |
| 476 Short s = (Short) utf8ToIndex.get(val); | |
| 477 dos.writeShort(s.shortValue()); | |
| 478 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
| 479 break; | |
| 480 } | |
| 481 | |
| 482 // all external, internal method/field references | |
| 483 case JVM_CONSTANT_Fieldref: | |
| 484 case JVM_CONSTANT_Methodref: | |
| 485 case JVM_CONSTANT_InterfaceMethodref: { | |
| 486 dos.writeByte(cpConstType); | |
| 487 int value = getIntAt(ci); | |
| 488 short klassIndex = (short) extractLowShortFromInt(value); | |
| 489 short nameAndTypeIndex = (short) extractHighShortFromInt(value); | |
| 490 dos.writeShort(klassIndex); | |
| 491 dos.writeShort(nameAndTypeIndex); | |
| 492 if (DEBUG) debugMessage("CP[" + ci + "] = ref klass = " + | |
| 493 klassIndex + ", N&T = " + nameAndTypeIndex); | |
| 494 break; | |
| 495 } | |
| 496 | |
| 497 case JVM_CONSTANT_NameAndType: { | |
| 498 dos.writeByte(cpConstType); | |
| 499 int value = getIntAt(ci); | |
| 500 short nameIndex = (short) extractLowShortFromInt(value); | |
| 501 short signatureIndex = (short) extractHighShortFromInt(value); | |
| 502 dos.writeShort(nameIndex); | |
| 503 dos.writeShort(signatureIndex); | |
| 504 if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex | |
| 505 + ", type = " + signatureIndex); | |
| 506 break; | |
| 507 } | |
| 1602 | 508 |
| 509 case JVM_CONSTANT_MethodHandle: { | |
| 510 dos.writeByte(cpConstType); | |
| 511 int value = getIntAt(ci); | |
| 512 short nameIndex = (short) extractLowShortFromInt(value); | |
| 513 short signatureIndex = (short) extractHighShortFromInt(value); | |
| 514 dos.writeShort(nameIndex); | |
| 515 dos.writeShort(signatureIndex); | |
| 516 if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex | |
| 517 + ", type = " + signatureIndex); | |
| 518 break; | |
| 519 } | |
| 1385 | 520 default: |
| 521 throw new InternalError("unknown tag: " + cpConstType); | |
| 0 | 522 } // switch |
| 523 } | |
| 524 dos.flush(); | |
| 525 return; | |
| 526 } | |
| 527 | |
| 528 public void printValueOn(PrintStream tty) { | |
| 529 tty.print("ConstantPool for " + getPoolHolder().getName().asString()); | |
| 530 } | |
| 531 | |
| 532 public long getObjectSize() { | |
|
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533 return alignObjectSize(headerSize + (getLength() * getElementSize())); |
| 0 | 534 } |
| 535 | |
| 536 //---------------------------------------------------------------------- | |
| 537 // Internals only below this point | |
| 538 // | |
| 539 | |
| 540 private static int extractHighShortFromInt(int val) { | |
| 1602 | 541 // must stay in sync with constantPoolOopDesc::name_and_type_at_put, method_at_put, etc. |
| 0 | 542 return (val >> 16) & 0xFFFF; |
| 543 } | |
| 544 | |
| 545 private static int extractLowShortFromInt(int val) { | |
| 1602 | 546 // must stay in sync with constantPoolOopDesc::name_and_type_at_put, method_at_put, etc. |
| 0 | 547 return val & 0xFFFF; |
| 548 } | |
| 549 } |