1 /* 2 * Copyright (c) 2022, 2024, 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 package jdk.internal.classfile.impl; 27 28 import java.lang.classfile.*; 29 import java.lang.classfile.attribute.*; 30 import java.lang.classfile.constantpool.*; 31 import java.util.ArrayList; 32 import java.util.Collections; 33 import java.util.List; 34 import java.util.Objects; 35 import java.util.Optional; 36 import java.util.function.Function; 37 38 import jdk.internal.access.SharedSecrets; 39 40 import static java.lang.classfile.Attributes.*; 41 42 public abstract sealed class BoundAttribute<T extends Attribute<T>> 43 extends AbstractElement 44 implements Attribute<T>, Util.Writable { 45 46 static final int NAME_AND_LENGTH_PREFIX = 6; 47 private final AttributeMapper<T> mapper; 48 final ClassReaderImpl classReader; 49 final int payloadStart; 50 Utf8Entry name; 51 52 BoundAttribute(ClassReader classReader, AttributeMapper<T> mapper, int payloadStart) { 53 this.mapper = mapper; 54 this.classReader = (ClassReaderImpl)classReader; 55 this.payloadStart = payloadStart; 56 } 57 58 public int payloadLen() { 59 return classReader.readInt(payloadStart - 4); 60 } 61 62 @Override 63 public Utf8Entry attributeName() { 64 if (name == null) { 65 name = classReader.readEntry(payloadStart - 6, Utf8Entry.class); 66 } 67 return name; 68 } 69 70 @Override 71 public AttributeMapper<T> attributeMapper() { 72 return mapper; 73 } 74 75 public byte[] contents() { 76 return classReader.readBytes(payloadStart, payloadLen()); 77 } 78 79 @Override 80 public void writeTo(DirectClassBuilder builder) { 81 builder.writeAttribute(this); 82 } 83 84 @Override 85 public void writeTo(DirectCodeBuilder builder) { 86 builder.writeAttribute(this); 87 } 88 89 @Override 90 public void writeTo(DirectMethodBuilder builder) { 91 builder.writeAttribute(this); 92 } 93 94 @Override 95 public void writeTo(DirectFieldBuilder builder) { 96 builder.writeAttribute(this); 97 } 98 99 @Override 100 @SuppressWarnings("unchecked") 101 public void writeTo(BufWriterImpl buf) { 102 if (!buf.canWriteDirect(classReader)) 103 attributeMapper().writeAttribute(buf, (T) this); 104 else 105 classReader.copyBytesTo(buf, payloadStart - NAME_AND_LENGTH_PREFIX, payloadLen() + NAME_AND_LENGTH_PREFIX); 106 } 107 108 public ConstantPool constantPool() { 109 return classReader; 110 } 111 112 @Override 113 public String toString() { 114 return String.format("Attribute[name=%s]", mapper.name()); 115 } 116 117 <E extends PoolEntry> List<E> readEntryList(int p, Class<E> type) { 118 int cnt = classReader.readU2(p); 119 p += 2; 120 var entries = new Object[cnt]; 121 int end = p + (cnt * 2); 122 for (int i = 0; p < end; i++, p += 2) { 123 entries[i] = classReader.readEntry(p, type); 124 } 125 return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(entries); 126 } 127 128 public static List<Attribute<?>> readAttributes(AttributedElement enclosing, ClassReader reader, int pos, 129 Function<Utf8Entry, AttributeMapper<?>> customAttributes) { 130 int size = reader.readU2(pos); 131 var filled = new ArrayList<Attribute<?>>(size); 132 int p = pos + 2; 133 int cfLen = reader.classfileLength(); 134 for (int i = 0; i < size; ++i) { 135 Utf8Entry name = reader.readEntry(p, Utf8Entry.class); 136 int len = reader.readInt(p + 2); 137 p += 6; 138 if (len < 0 || len > cfLen - p) { 139 throw new IllegalArgumentException("attribute " + name.stringValue() + " too big to handle"); 140 } 141 142 var mapper = standardAttribute(name); 143 if (mapper == null) { 144 mapper = customAttributes.apply(name); 145 } 146 if (mapper != null) { 147 filled.add(Objects.requireNonNull(mapper.readAttribute(enclosing, reader, p))); 148 } else { 149 AttributeMapper<UnknownAttribute> fakeMapper = new AttributeMapper<>() { 150 @Override 151 public String name() { 152 return name.stringValue(); 153 } 154 155 @Override 156 public UnknownAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) { 157 // Will never get called 158 throw new UnsupportedOperationException(); 159 } 160 161 @Override 162 public void writeAttribute(BufWriter buf, UnknownAttribute attr) { 163 buf.writeIndex(name); 164 var cont = attr.contents(); 165 buf.writeInt(cont.length); 166 buf.writeBytes(cont); 167 } 168 169 @Override 170 public boolean allowMultiple() { 171 return true; 172 } 173 174 @Override 175 public AttributeMapper.AttributeStability stability() { 176 return AttributeStability.UNKNOWN; 177 } 178 }; 179 filled.add(new BoundUnknownAttribute(reader, fakeMapper, p)); 180 } 181 p += len; 182 } 183 return Collections.unmodifiableList(filled); 184 } 185 186 public static final class BoundUnknownAttribute extends BoundAttribute<UnknownAttribute> 187 implements UnknownAttribute { 188 public BoundUnknownAttribute(ClassReader cf, AttributeMapper<UnknownAttribute> mapper, int pos) { 189 super(cf, mapper, pos); 190 } 191 } 192 193 public static final class BoundStackMapTableAttribute 194 extends BoundAttribute<StackMapTableAttribute> 195 implements StackMapTableAttribute { 196 final MethodModel method; 197 final LabelContext ctx; 198 List<StackMapFrameInfo> entries = null; 199 200 public BoundStackMapTableAttribute(CodeImpl code, ClassReader cf, AttributeMapper<StackMapTableAttribute> mapper, int pos) { 201 super(cf, mapper, pos); 202 method = code.parent().orElseThrow(); 203 ctx = code; 204 } 205 206 @Override 207 public List<StackMapFrameInfo> entries() { 208 if (entries == null) { 209 entries = new StackMapDecoder(classReader, payloadStart, ctx, StackMapDecoder.initFrameLocals(method)).entries(); 210 } 211 return entries; 212 } 213 } 214 215 public static final class BoundSyntheticAttribute extends BoundAttribute<SyntheticAttribute> 216 implements SyntheticAttribute { 217 public BoundSyntheticAttribute(ClassReader cf, AttributeMapper<SyntheticAttribute> mapper, int pos) { 218 super(cf, mapper, pos); 219 } 220 } 221 222 public static final class BoundLineNumberTableAttribute 223 extends BoundAttribute<LineNumberTableAttribute> 224 implements LineNumberTableAttribute { 225 private List<LineNumberInfo> lineNumbers = null; 226 227 public BoundLineNumberTableAttribute(ClassReader cf, AttributeMapper<LineNumberTableAttribute> mapper, int pos) { 228 super(cf, mapper, pos); 229 } 230 231 @Override 232 public List<LineNumberInfo> lineNumbers() { 233 if (lineNumbers == null) { 234 int nLn = classReader.readU2(payloadStart); 235 LineNumberInfo[] elements = new LineNumberInfo[nLn]; 236 int p = payloadStart + 2; 237 int pEnd = p + (nLn * 4); 238 for (int i = 0; p < pEnd; p += 4, i++) { 239 int startPc = classReader.readU2(p); 240 int lineNumber = classReader.readU2(p + 2); 241 elements[i] = LineNumberInfo.of(startPc, lineNumber); 242 } 243 lineNumbers = List.of(elements); 244 } 245 return lineNumbers; 246 } 247 } 248 249 public static final class BoundCharacterRangeTableAttribute extends BoundAttribute<CharacterRangeTableAttribute> implements CharacterRangeTableAttribute { 250 private List<CharacterRangeInfo> characterRangeTable = null; 251 252 public BoundCharacterRangeTableAttribute(ClassReader cf, AttributeMapper<CharacterRangeTableAttribute> mapper, int pos) { 253 super(cf, mapper, pos); 254 } 255 256 @Override 257 public List<CharacterRangeInfo> characterRangeTable() { 258 if (characterRangeTable == null) { 259 int nLn = classReader.readU2(payloadStart); 260 CharacterRangeInfo[] elements = new CharacterRangeInfo[nLn]; 261 int p = payloadStart + 2; 262 int pEnd = p + (nLn * 14); 263 for (int i = 0; p < pEnd; p += 14, i++) { 264 int startPc = classReader.readU2(p); 265 int endPc = classReader.readU2(p + 2); 266 int characterRangeStart = classReader.readInt(p + 4); 267 int characterRangeEnd = classReader.readInt(p + 8); 268 int flags = classReader.readU2(p + 12); 269 elements[i] = CharacterRangeInfo.of(startPc, endPc, characterRangeStart, characterRangeEnd, flags); 270 } 271 characterRangeTable = List.of(elements); 272 } 273 return characterRangeTable; 274 } 275 } 276 277 public static final class BoundLocalVariableTableAttribute 278 extends BoundAttribute<LocalVariableTableAttribute> 279 implements LocalVariableTableAttribute { 280 private final CodeImpl codeAttribute; 281 private List<LocalVariableInfo> localVars = null; 282 283 public BoundLocalVariableTableAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<LocalVariableTableAttribute> mapper, int pos) { 284 super(cf, mapper, pos); 285 if (enclosing instanceof CodeImpl ci) { 286 this.codeAttribute = ci; 287 } else { 288 throw new IllegalArgumentException("Invalid LocalVariableTable attribute location"); 289 } 290 } 291 292 @Override 293 public List<LocalVariableInfo> localVariables() { 294 if (localVars == null) { 295 int cnt = classReader.readU2(payloadStart); 296 BoundLocalVariable[] elements = new BoundLocalVariable[cnt]; 297 int p = payloadStart + 2; 298 int pEnd = p + (cnt * 10); 299 for (int i = 0; p < pEnd; p += 10, i++) { 300 elements[i] = new BoundLocalVariable(codeAttribute, p); 301 } 302 localVars = List.of(elements); 303 } 304 return localVars; 305 } 306 } 307 308 public static final class BoundLocalVariableTypeTableAttribute 309 extends BoundAttribute<LocalVariableTypeTableAttribute> 310 implements LocalVariableTypeTableAttribute { 311 private final CodeImpl codeAttribute; 312 private List<LocalVariableTypeInfo> localVars = null; 313 314 public BoundLocalVariableTypeTableAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<LocalVariableTypeTableAttribute> mapper, int pos) { 315 super(cf, mapper, pos); 316 if (enclosing instanceof CodeImpl ci) { 317 this.codeAttribute = ci; 318 } else { 319 throw new IllegalArgumentException("Invalid LocalVariableTypeTable attribute location"); 320 } 321 } 322 323 @Override 324 public List<LocalVariableTypeInfo> localVariableTypes() { 325 if (localVars == null) { 326 final int cnt = classReader.readU2(payloadStart); 327 BoundLocalVariableType[] elements = new BoundLocalVariableType[cnt]; 328 int p = payloadStart + 2; 329 int pEnd = p + (cnt * 10); 330 for (int i = 0; p < pEnd; p += 10, i++) { 331 elements[i] = new BoundLocalVariableType(codeAttribute, p); 332 } 333 localVars = List.of(elements); 334 } 335 return localVars; 336 } 337 } 338 339 public static final class BoundMethodParametersAttribute extends BoundAttribute<MethodParametersAttribute> 340 implements MethodParametersAttribute { 341 private List<MethodParameterInfo> parameters = null; 342 343 public BoundMethodParametersAttribute(ClassReader cf, AttributeMapper<MethodParametersAttribute> mapper, int pos) { 344 super(cf, mapper, pos); 345 } 346 347 @Override 348 public List<MethodParameterInfo> parameters() { 349 if (parameters == null) { 350 final int cnt = classReader.readU1(payloadStart); 351 MethodParameterInfo[] elements = new MethodParameterInfo[cnt]; 352 int p = payloadStart + 1; 353 int pEnd = p + (cnt * 4); 354 for (int i = 0; p < pEnd; p += 4, i++) { 355 Utf8Entry name = classReader.readEntryOrNull(p, Utf8Entry.class); 356 int accessFlags = classReader.readU2(p + 2); 357 elements[i] = MethodParameterInfo.of(Optional.ofNullable(name), accessFlags); 358 } 359 parameters = List.of(elements); 360 } 361 return parameters; 362 } 363 } 364 365 public static final class BoundModuleHashesAttribute extends BoundAttribute<ModuleHashesAttribute> 366 implements ModuleHashesAttribute { 367 private List<ModuleHashInfo> hashes = null; 368 369 public BoundModuleHashesAttribute(ClassReader cf, AttributeMapper<ModuleHashesAttribute> mapper, int pos) { 370 super(cf, mapper, pos); 371 } 372 373 @Override 374 public Utf8Entry algorithm() { 375 return classReader.readEntry(payloadStart, Utf8Entry.class); 376 } 377 378 @Override 379 public List<ModuleHashInfo> hashes() { 380 if (hashes == null) { 381 final int cnt = classReader.readU2(payloadStart + 2); 382 ModuleHashInfo[] elements = new ModuleHashInfo[cnt]; 383 int p = payloadStart + 4; 384 //System.err.printf("%5d: ModuleHashesAttr alg = %s, cnt = %d%n", pos, algorithm(), cnt); 385 for (int i = 0; i < cnt; ++i) { 386 ModuleEntry module = classReader.readEntry(p, ModuleEntry.class); 387 int hashLength = classReader.readU2(p + 2); 388 //System.err.printf("%5d: [%d] module = %s, hashLength = %d%n", p, i, module, hashLength); 389 p += 4; 390 elements[i] = ModuleHashInfo.of(module, classReader.readBytes(p, hashLength)); 391 p += hashLength; 392 } 393 hashes = List.of(elements); 394 } 395 return hashes; 396 } 397 } 398 399 public static final class BoundRecordAttribute extends BoundAttribute<RecordAttribute> 400 implements RecordAttribute { 401 private List<RecordComponentInfo> components = null; 402 403 public BoundRecordAttribute(ClassReader cf, AttributeMapper<RecordAttribute> mapper, int pos) { 404 super(cf, mapper, pos); 405 } 406 407 @Override 408 public List<RecordComponentInfo> components() { 409 if (components == null) { 410 final int cnt = classReader.readU2(payloadStart); 411 RecordComponentInfo[] elements = new RecordComponentInfo[cnt]; 412 int p = payloadStart + 2; 413 for (int i = 0; i < cnt; i++) { 414 elements[i] = new BoundRecordComponentInfo(classReader, p); 415 p = classReader.skipAttributeHolder(p + 4); 416 } 417 components = List.of(elements); 418 } 419 return components; 420 } 421 } 422 423 public static final class BoundDeprecatedAttribute extends BoundAttribute<DeprecatedAttribute> 424 implements DeprecatedAttribute { 425 public BoundDeprecatedAttribute(ClassReader cf, AttributeMapper<DeprecatedAttribute> mapper, int pos) { 426 super(cf, mapper, pos); 427 } 428 } 429 430 public static final class BoundSignatureAttribute extends BoundAttribute<SignatureAttribute> 431 implements SignatureAttribute { 432 public BoundSignatureAttribute(ClassReader cf, AttributeMapper<SignatureAttribute> mapper, int pos) { 433 super(cf, mapper, pos); 434 } 435 436 @Override 437 public Utf8Entry signature() { 438 return classReader.readEntry(payloadStart, Utf8Entry.class); 439 } 440 } 441 442 public static final class BoundSourceFileAttribute extends BoundAttribute<SourceFileAttribute> 443 implements SourceFileAttribute { 444 public BoundSourceFileAttribute(ClassReader cf, AttributeMapper<SourceFileAttribute> mapper, int pos) { 445 super(cf, mapper, pos); 446 } 447 448 @Override 449 public Utf8Entry sourceFile() { 450 return classReader.readEntry(payloadStart, Utf8Entry.class); 451 } 452 453 } 454 455 public static final class BoundModuleMainClassAttribute extends BoundAttribute<ModuleMainClassAttribute> implements ModuleMainClassAttribute { 456 public BoundModuleMainClassAttribute(ClassReader cf, AttributeMapper<ModuleMainClassAttribute> mapper, int pos) { 457 super(cf, mapper, pos); 458 } 459 460 @Override 461 public ClassEntry mainClass() { 462 return classReader.readEntry(payloadStart, ClassEntry.class); 463 } 464 } 465 466 public static final class BoundNestHostAttribute extends BoundAttribute<NestHostAttribute> 467 implements NestHostAttribute { 468 public BoundNestHostAttribute(ClassReader cf, AttributeMapper<NestHostAttribute> mapper, int pos) { 469 super(cf, mapper, pos); 470 } 471 472 @Override 473 public ClassEntry nestHost() { 474 return classReader.readEntry(payloadStart, ClassEntry.class); 475 } 476 } 477 478 public static final class BoundSourceDebugExtensionAttribute extends BoundAttribute<SourceDebugExtensionAttribute> 479 implements SourceDebugExtensionAttribute { 480 public BoundSourceDebugExtensionAttribute(ClassReader cf, AttributeMapper<SourceDebugExtensionAttribute> mapper, int pos) { 481 super(cf, mapper, pos); 482 } 483 } 484 485 public static final class BoundConstantValueAttribute extends BoundAttribute<ConstantValueAttribute> 486 implements ConstantValueAttribute { 487 public BoundConstantValueAttribute(ClassReader cf, AttributeMapper<ConstantValueAttribute> mapper, int pos) { 488 super(cf, mapper, pos); 489 } 490 491 @Override 492 public ConstantValueEntry constant() { 493 return classReader.readEntry(payloadStart, ConstantValueEntry.class); 494 } 495 496 } 497 498 public static final class BoundModuleTargetAttribute extends BoundAttribute<ModuleTargetAttribute> 499 implements ModuleTargetAttribute { 500 public BoundModuleTargetAttribute(ClassReader cf, AttributeMapper<ModuleTargetAttribute> mapper, int pos) { 501 super(cf, mapper, pos); 502 } 503 504 @Override 505 public Utf8Entry targetPlatform() { 506 return classReader.readEntry(payloadStart, Utf8Entry.class); 507 } 508 } 509 510 public static final class BoundCompilationIDAttribute extends BoundAttribute<CompilationIDAttribute> 511 implements CompilationIDAttribute { 512 public BoundCompilationIDAttribute(ClassReader cf, AttributeMapper<CompilationIDAttribute> mapper, int pos) { 513 super(cf, mapper, pos); 514 } 515 516 @Override 517 public Utf8Entry compilationId() { 518 return classReader.readEntry(payloadStart, Utf8Entry.class); 519 } 520 } 521 522 public static final class BoundSourceIDAttribute extends BoundAttribute<SourceIDAttribute> 523 implements SourceIDAttribute { 524 public BoundSourceIDAttribute(ClassReader cf, AttributeMapper<SourceIDAttribute> mapper, int pos) { 525 super(cf, mapper, pos); 526 } 527 528 @Override 529 public Utf8Entry sourceId() { 530 return classReader.readEntry(payloadStart, Utf8Entry.class); 531 } 532 } 533 534 public static final class BoundModuleResolutionAttribute extends BoundAttribute<ModuleResolutionAttribute> 535 implements ModuleResolutionAttribute { 536 public BoundModuleResolutionAttribute(ClassReader cf, AttributeMapper<ModuleResolutionAttribute> mapper, int pos) { 537 super(cf, mapper, pos); 538 } 539 540 @Override 541 public int resolutionFlags() { 542 return classReader.readU2(payloadStart); 543 } 544 } 545 546 public static final class BoundExceptionsAttribute extends BoundAttribute<ExceptionsAttribute> 547 implements ExceptionsAttribute { 548 private List<ClassEntry> exceptions = null; 549 550 public BoundExceptionsAttribute(ClassReader cf, AttributeMapper<ExceptionsAttribute> mapper, int pos) { 551 super(cf, mapper, pos); 552 } 553 554 @Override 555 public List<ClassEntry> exceptions() { 556 if (exceptions == null) { 557 exceptions = readEntryList(payloadStart, ClassEntry.class); 558 } 559 return exceptions; 560 } 561 } 562 563 public static final class BoundModuleAttribute extends BoundAttribute<ModuleAttribute> 564 implements ModuleAttribute { 565 private List<ModuleRequireInfo> requires = null; 566 private List<ModuleExportInfo> exports = null; 567 private List<ModuleOpenInfo> opens = null; 568 private List<ClassEntry> uses = null; 569 private List<ModuleProvideInfo> provides = null; 570 571 public BoundModuleAttribute(ClassReader cf, AttributeMapper<ModuleAttribute> mapper, int pos) { 572 super(cf, mapper, pos); 573 } 574 575 @Override 576 public ModuleEntry moduleName() { 577 return classReader.readEntry(payloadStart, ModuleEntry.class); 578 } 579 580 @Override 581 public int moduleFlagsMask() { 582 return classReader.readU2(payloadStart + 2); 583 } 584 585 @Override 586 public Optional<Utf8Entry> moduleVersion() { 587 return Optional.ofNullable(classReader.readEntryOrNull(payloadStart + 4, Utf8Entry.class)); 588 } 589 590 @Override 591 public List<ModuleRequireInfo> requires() { 592 if (requires == null) { 593 structure(); 594 } 595 return requires; 596 } 597 598 @Override 599 public List<ModuleExportInfo> exports() { 600 if (exports == null) { 601 structure(); 602 } 603 return exports; 604 } 605 606 @Override 607 public List<ModuleOpenInfo> opens() { 608 if (opens == null) { 609 structure(); 610 } 611 return opens; 612 } 613 614 @Override 615 public List<ClassEntry> uses() { 616 if (uses == null) { 617 structure(); 618 } 619 return uses; 620 } 621 622 @Override 623 public List<ModuleProvideInfo> provides() { 624 if (provides == null) { 625 structure(); 626 } 627 return provides; 628 } 629 630 private void structure() { 631 int p = payloadStart + 8; 632 633 { 634 int cnt = classReader.readU2(payloadStart + 6); 635 ModuleRequireInfo[] elements = new ModuleRequireInfo[cnt]; 636 int end = p + (cnt * 6); 637 for (int i = 0; p < end; p += 6, i++) { 638 elements[i] = ModuleRequireInfo.of(classReader.readEntry(p, ModuleEntry.class), 639 classReader.readU2(p + 2), 640 classReader.readEntryOrNull(p + 4, Utf8Entry.class)); 641 } 642 requires = List.of(elements); 643 } 644 645 { 646 int cnt = classReader.readU2(p); 647 p += 2; 648 ModuleExportInfo[] elements = new ModuleExportInfo[cnt]; 649 for (int i = 0; i < cnt; i++) { 650 PackageEntry pe = classReader.readEntry(p, PackageEntry.class); 651 int exportFlags = classReader.readU2(p + 2); 652 p += 4; 653 List<ModuleEntry> exportsTo = readEntryList(p, ModuleEntry.class); 654 p += 2 + exportsTo.size() * 2; 655 elements[i] = ModuleExportInfo.of(pe, exportFlags, exportsTo); 656 } 657 exports = List.of(elements); 658 } 659 660 { 661 int cnt = classReader.readU2(p); 662 p += 2; 663 ModuleOpenInfo[] elements = new ModuleOpenInfo[cnt]; 664 for (int i = 0; i < cnt; i++) { 665 PackageEntry po = classReader.readEntry(p, PackageEntry.class); 666 int opensFlags = classReader.readU2(p + 2); 667 p += 4; 668 List<ModuleEntry> opensTo = readEntryList(p, ModuleEntry.class); 669 p += 2 + opensTo.size() * 2; 670 elements[i] = ModuleOpenInfo.of(po, opensFlags, opensTo); 671 } 672 opens = List.of(elements); 673 } 674 675 { 676 uses = readEntryList(p, ClassEntry.class); 677 p += 2 + uses.size() * 2; 678 int cnt = classReader.readU2(p); 679 p += 2; 680 ModuleProvideInfo[] elements = new ModuleProvideInfo[cnt]; 681 provides = new ArrayList<>(cnt); 682 for (int i = 0; i < cnt; i++) { 683 ClassEntry c = classReader.readEntry(p, ClassEntry.class); 684 p += 2; 685 List<ClassEntry> providesWith = readEntryList(p, ClassEntry.class); 686 p += 2 + providesWith.size() * 2; 687 elements[i] = ModuleProvideInfo.of(c, providesWith); 688 } 689 provides = List.of(elements); 690 } 691 } 692 } 693 694 public static final class BoundModulePackagesAttribute extends BoundAttribute<ModulePackagesAttribute> 695 implements ModulePackagesAttribute { 696 private List<PackageEntry> packages = null; 697 698 public BoundModulePackagesAttribute(ClassReader cf, AttributeMapper<ModulePackagesAttribute> mapper, int pos) { 699 super(cf, mapper, pos); 700 } 701 702 @Override 703 public List<PackageEntry> packages() { 704 if (packages == null) { 705 packages = readEntryList(payloadStart, PackageEntry.class); 706 } 707 return packages; 708 } 709 } 710 711 public static final class BoundNestMembersAttribute extends BoundAttribute<NestMembersAttribute> 712 implements NestMembersAttribute { 713 714 private List<ClassEntry> members = null; 715 716 public BoundNestMembersAttribute(ClassReader cf, AttributeMapper<NestMembersAttribute> mapper, int pos) { 717 super(cf, mapper, pos); 718 } 719 720 @Override 721 public List<ClassEntry> nestMembers() { 722 if (members == null) { 723 members = readEntryList(payloadStart, ClassEntry.class); 724 } 725 return members; 726 } 727 } 728 729 public static final class BoundBootstrapMethodsAttribute extends BoundAttribute<BootstrapMethodsAttribute> 730 implements BootstrapMethodsAttribute { 731 732 private List<BootstrapMethodEntry> bootstraps = null; 733 private final int size; 734 735 public BoundBootstrapMethodsAttribute(ClassReader reader, AttributeMapper<BootstrapMethodsAttribute> mapper, int pos) { 736 super(reader, mapper, pos); 737 size = classReader.readU2(pos); 738 } 739 740 @Override 741 public int bootstrapMethodsSize() { 742 return size; 743 } 744 745 @Override 746 public List<BootstrapMethodEntry> bootstrapMethods() { 747 if (bootstraps == null) { 748 BootstrapMethodEntry[] bs = new BootstrapMethodEntry[size]; 749 int p = payloadStart + 2; 750 for (int i = 0; i < size; ++i) { 751 final var handle = classReader.readEntry(p, AbstractPoolEntry.MethodHandleEntryImpl.class); 752 final List<LoadableConstantEntry> args = readEntryList(p + 2, LoadableConstantEntry.class); 753 p += 4 + args.size() * 2; 754 int hash = BootstrapMethodEntryImpl.computeHashCode(handle, args); 755 bs[i] = new BootstrapMethodEntryImpl(classReader, i, hash, handle, args); 756 } 757 bootstraps = List.of(bs); 758 } 759 return bootstraps; 760 } 761 } 762 763 public static final class BoundInnerClassesAttribute extends BoundAttribute<InnerClassesAttribute> 764 implements InnerClassesAttribute { 765 private List<InnerClassInfo> classes; 766 767 public BoundInnerClassesAttribute(ClassReader cf, AttributeMapper<InnerClassesAttribute> mapper, int pos) { 768 super(cf, mapper, pos); 769 } 770 771 @Override 772 public List<InnerClassInfo> classes() { 773 if (classes == null) { 774 final int cnt = classReader.readU2(payloadStart); 775 int p = payloadStart + 2; 776 InnerClassInfo[] elements = new InnerClassInfo[cnt]; 777 for (int i = 0; i < cnt; i++) { 778 ClassEntry innerClass = classReader.readEntry(p, ClassEntry.class); 779 var outerClass = classReader.readEntryOrNull(p + 2, ClassEntry.class); 780 var innerName = classReader.readEntryOrNull(p + 4, Utf8Entry.class); 781 int flags = classReader.readU2(p + 6); 782 p += 8; 783 elements[i] = InnerClassInfo.of(innerClass, Optional.ofNullable(outerClass), Optional.ofNullable(innerName), flags); 784 } 785 classes = List.of(elements); 786 } 787 return classes; 788 } 789 } 790 791 public static final class BoundEnclosingMethodAttribute extends BoundAttribute<EnclosingMethodAttribute> 792 implements EnclosingMethodAttribute { 793 public BoundEnclosingMethodAttribute(ClassReader cf, AttributeMapper<EnclosingMethodAttribute> mapper, int pos) { 794 super(cf, mapper, pos); 795 } 796 797 @Override 798 public ClassEntry enclosingClass() { 799 return classReader.readEntry(payloadStart, ClassEntry.class); 800 } 801 802 @Override 803 public Optional<NameAndTypeEntry> enclosingMethod() { 804 return Optional.ofNullable(classReader.readEntryOrNull(payloadStart + 2, NameAndTypeEntry.class)); 805 } 806 } 807 808 public static final class BoundAnnotationDefaultAttr 809 extends BoundAttribute<AnnotationDefaultAttribute> 810 implements AnnotationDefaultAttribute { 811 private AnnotationValue annotationValue; 812 813 public BoundAnnotationDefaultAttr(ClassReader cf, AttributeMapper<AnnotationDefaultAttribute> mapper, int pos) { 814 super(cf, mapper, pos); 815 } 816 817 @Override 818 public AnnotationValue defaultValue() { 819 if (annotationValue == null) 820 annotationValue = AnnotationReader.readElementValue(classReader, payloadStart); 821 return annotationValue; 822 } 823 } 824 825 public static final class BoundRuntimeVisibleTypeAnnotationsAttribute extends BoundAttribute<RuntimeVisibleTypeAnnotationsAttribute> 826 implements RuntimeVisibleTypeAnnotationsAttribute { 827 828 private final LabelContext labelContext; 829 830 public BoundRuntimeVisibleTypeAnnotationsAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<RuntimeVisibleTypeAnnotationsAttribute> mapper, int pos) { 831 super(cf, mapper, pos); 832 this.labelContext = (enclosing instanceof LabelContext lc) ? lc : null; 833 } 834 835 @Override 836 public List<TypeAnnotation> annotations() { 837 return AnnotationReader.readTypeAnnotations(classReader, payloadStart, labelContext); 838 } 839 } 840 841 public static final class BoundRuntimeInvisibleTypeAnnotationsAttribute 842 extends BoundAttribute<RuntimeInvisibleTypeAnnotationsAttribute> 843 implements RuntimeInvisibleTypeAnnotationsAttribute { 844 public BoundRuntimeInvisibleTypeAnnotationsAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<RuntimeInvisibleTypeAnnotationsAttribute> mapper, int pos) { 845 super(cf, mapper, pos); 846 this.labelContext = (enclosing instanceof LabelContext lc) ? lc : null; 847 } 848 849 private final LabelContext labelContext; 850 851 @Override 852 public List<TypeAnnotation> annotations() { 853 return AnnotationReader.readTypeAnnotations(classReader, payloadStart, labelContext); 854 } 855 } 856 857 public static final class BoundRuntimeVisibleParameterAnnotationsAttribute 858 extends BoundAttribute<RuntimeVisibleParameterAnnotationsAttribute> 859 implements RuntimeVisibleParameterAnnotationsAttribute { 860 861 public BoundRuntimeVisibleParameterAnnotationsAttribute(ClassReader cf, AttributeMapper<RuntimeVisibleParameterAnnotationsAttribute> mapper, int pos) { 862 super(cf, mapper, pos); 863 } 864 865 @Override 866 public List<List<Annotation>> parameterAnnotations() { 867 return AnnotationReader.readParameterAnnotations(classReader, payloadStart); 868 } 869 } 870 871 public static final class BoundRuntimeInvisibleParameterAnnotationsAttribute 872 extends BoundAttribute<RuntimeInvisibleParameterAnnotationsAttribute> 873 implements RuntimeInvisibleParameterAnnotationsAttribute { 874 875 public BoundRuntimeInvisibleParameterAnnotationsAttribute(ClassReader cf, AttributeMapper<RuntimeInvisibleParameterAnnotationsAttribute> mapper, int pos) { 876 super(cf, mapper, pos); 877 } 878 879 @Override 880 public List<List<Annotation>> parameterAnnotations() { 881 return AnnotationReader.readParameterAnnotations(classReader, payloadStart); 882 } 883 } 884 885 public static final class BoundRuntimeInvisibleAnnotationsAttribute 886 extends BoundAttribute<RuntimeInvisibleAnnotationsAttribute> 887 implements RuntimeInvisibleAnnotationsAttribute { 888 private List<Annotation> inflated; 889 890 public BoundRuntimeInvisibleAnnotationsAttribute(ClassReader cf, 891 int payloadStart) { 892 super(cf, Attributes.runtimeInvisibleAnnotations(), payloadStart); 893 } 894 895 @Override 896 public List<Annotation> annotations() { 897 if (inflated == null) 898 inflated = AnnotationReader.readAnnotations(classReader, payloadStart); 899 return inflated; 900 } 901 } 902 903 public static final class BoundRuntimeVisibleAnnotationsAttribute 904 extends BoundAttribute<RuntimeVisibleAnnotationsAttribute> 905 implements RuntimeVisibleAnnotationsAttribute { 906 private List<Annotation> inflated; 907 908 public BoundRuntimeVisibleAnnotationsAttribute(ClassReader cf, 909 int payloadStart) { 910 super(cf, Attributes.runtimeVisibleAnnotations(), payloadStart); 911 } 912 913 @Override 914 public List<Annotation> annotations() { 915 if (inflated == null) 916 inflated = AnnotationReader.readAnnotations(classReader, payloadStart); 917 return inflated; 918 } 919 } 920 921 public static final class BoundPermittedSubclassesAttribute extends BoundAttribute<PermittedSubclassesAttribute> 922 implements PermittedSubclassesAttribute { 923 private List<ClassEntry> permittedSubclasses = null; 924 925 public BoundPermittedSubclassesAttribute(ClassReader cf, AttributeMapper<PermittedSubclassesAttribute> mapper, int pos) { 926 super(cf, mapper, pos); 927 } 928 929 @Override 930 public List<ClassEntry> permittedSubclasses() { 931 if (permittedSubclasses == null) { 932 permittedSubclasses = readEntryList(payloadStart, ClassEntry.class); 933 } 934 return permittedSubclasses; 935 } 936 } 937 938 public static final class BoundLoadableDescriptorsAttribute extends BoundAttribute<LoadableDescriptorsAttribute> 939 implements LoadableDescriptorsAttribute { 940 private List<Utf8Entry> loadableDescriptors = null; 941 942 public BoundLoadableDescriptorsAttribute(ClassReader cf, AttributeMapper<LoadableDescriptorsAttribute> mapper, int pos) { 943 super(cf, mapper, pos); 944 } 945 946 @Override 947 public List<Utf8Entry> loadableDescriptors() { 948 if (loadableDescriptors == null) { 949 loadableDescriptors = readEntryList(payloadStart, Utf8Entry.class); 950 } 951 return loadableDescriptors; 952 } 953 } 954 955 public abstract static sealed class BoundCodeAttribute 956 extends BoundAttribute<CodeAttribute> 957 implements CodeAttribute 958 permits CodeImpl { 959 protected final int codeStart; 960 protected final int codeLength; 961 protected final int codeEnd; 962 protected final int attributePos; 963 protected final int exceptionHandlerPos; 964 protected final int exceptionHandlerCnt; 965 protected final MethodModel enclosingMethod; 966 967 public BoundCodeAttribute(AttributedElement enclosing, 968 ClassReader reader, 969 AttributeMapper<CodeAttribute> mapper, 970 int payloadStart) { 971 super(reader, mapper, payloadStart); 972 this.codeLength = classReader.readInt(payloadStart + 4); 973 this.enclosingMethod = (MethodModel) enclosing; 974 this.codeStart = payloadStart + 8; 975 this.codeEnd = codeStart + codeLength; 976 this.exceptionHandlerPos = codeEnd; 977 this.exceptionHandlerCnt = classReader.readU2(exceptionHandlerPos); 978 this.attributePos = exceptionHandlerPos + 2 + exceptionHandlerCnt * 8; 979 } 980 981 // CodeAttribute 982 983 @Override 984 public int maxStack() { 985 return classReader.readU2(payloadStart); 986 } 987 988 @Override 989 public int maxLocals() { 990 return classReader.readU2(payloadStart + 2); 991 } 992 993 @Override 994 public int codeLength() { 995 return codeLength; 996 } 997 998 @Override 999 public byte[] codeArray() { 1000 return classReader.readBytes(payloadStart + 8, codeLength()); 1001 } 1002 } 1003 1004 /** 1005 * {@return the attribute mapper for a standard attribute} 1006 * 1007 * @param name the name of the attribute to find 1008 */ 1009 public static AttributeMapper<?> standardAttribute(Utf8Entry name) { 1010 // critical bootstrap path, so no lambdas nor method handles here 1011 return switch (name.hashCode()) { 1012 case 0x46699ff2 -> 1013 name.equalsString(NAME_ANNOTATION_DEFAULT) ? annotationDefault() : null; 1014 case 0x5208e184 -> 1015 name.equalsString(NAME_BOOTSTRAP_METHODS) ? bootstrapMethods() : null; 1016 case 0xcb60907a -> 1017 name.equalsString(NAME_CHARACTER_RANGE_TABLE) ? characterRangeTable() : null; 1018 case 0x4020220d -> 1019 name.equalsString(NAME_CODE) ? code() : null; 1020 case 0xc20dd1fe -> 1021 name.equalsString(NAME_COMPILATION_ID) ? compilationId() : null; 1022 case 0xcab1940d -> 1023 name.equalsString(NAME_CONSTANT_VALUE) ? constantValue() : null; 1024 case 0x558641d3 -> 1025 name.equalsString(NAME_DEPRECATED) ? deprecated() : null; 1026 case 0x51d443cd -> 1027 name.equalsString(NAME_ENCLOSING_METHOD) ? enclosingMethod() : null; 1028 case 0x687c1624 -> 1029 name.equalsString(NAME_EXCEPTIONS) ? exceptions() : null; 1030 case 0x7adb2910 -> 1031 name.equalsString(NAME_INNER_CLASSES) ? innerClasses() : null; 1032 case 0x653f0551 -> 1033 name.equalsString(NAME_LINE_NUMBER_TABLE) ? lineNumberTable() : null; 1034 case 0x5f348b64 -> 1035 name.equalsString(NAME_LOADABLE_DESCRIPTORS) ? loadableDescriptors() : null; 1036 case 0x64c75927 -> 1037 name.equalsString(NAME_LOCAL_VARIABLE_TABLE) ? localVariableTable() : null; 1038 case 0x6697f98d -> 1039 name.equalsString(NAME_LOCAL_VARIABLE_TYPE_TABLE) ? localVariableTypeTable() : null; 1040 case 0xdbb0cdcb -> 1041 name.equalsString(NAME_METHOD_PARAMETERS) ? methodParameters() : null; 1042 case 0xc9b0928c -> 1043 name.equalsString(NAME_MODULE) ? module() : null; 1044 case 0x41cd27e8 -> 1045 name.equalsString(NAME_MODULE_HASHES) ? moduleHashes() : null; 1046 case 0x7deb0a13 -> 1047 name.equalsString(NAME_MODULE_MAIN_CLASS) ? moduleMainClass() : null; 1048 case 0x6706ff99 -> 1049 name.equalsString(NAME_MODULE_PACKAGES) ? modulePackages() : null; 1050 case 0x60272858 -> 1051 name.equalsString(NAME_MODULE_RESOLUTION) ? moduleResolution() : null; 1052 case 0x5646d73d -> 1053 name.equalsString(NAME_MODULE_TARGET) ? moduleTarget() : null; 1054 case 0x50336c40 -> 1055 name.equalsString(NAME_NEST_HOST) ? nestHost() : null; 1056 case 0x4735ab81 -> 1057 name.equalsString(NAME_NEST_MEMBERS) ? nestMembers() : null; 1058 case 0x7100d9fe -> 1059 name.equalsString(NAME_PERMITTED_SUBCLASSES) ? permittedSubclasses() : null; 1060 case 0xd1ab5871 -> 1061 name.equalsString(NAME_RECORD) ? record() : null; 1062 case 0x7588550f -> 1063 name.equalsString(NAME_RUNTIME_INVISIBLE_ANNOTATIONS) ? runtimeInvisibleAnnotations() : null; 1064 case 0xcc74da30 -> 1065 name.equalsString(NAME_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS) ? runtimeInvisibleParameterAnnotations() : null; 1066 case 0xf67697f5 -> 1067 name.equalsString(NAME_RUNTIME_INVISIBLE_TYPE_ANNOTATIONS) ? runtimeInvisibleTypeAnnotations() : null; 1068 case 0xe0837d2a -> 1069 name.equalsString(NAME_RUNTIME_VISIBLE_ANNOTATIONS) ? runtimeVisibleAnnotations() : null; 1070 case 0xc945a075 -> 1071 name.equalsString(NAME_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS) ? runtimeVisibleParameterAnnotations() : null; 1072 case 0x611a3a90 -> 1073 name.equalsString(NAME_RUNTIME_VISIBLE_TYPE_ANNOTATIONS) ? runtimeVisibleTypeAnnotations() : null; 1074 case 0xf76fb898 -> 1075 name.equalsString(NAME_SIGNATURE) ? signature() : null; 1076 case 0x6b41b047 -> 1077 name.equalsString(NAME_SOURCE_DEBUG_EXTENSION) ? sourceDebugExtension() : null; 1078 case 0x748c2857 -> 1079 name.equalsString(NAME_SOURCE_FILE) ? sourceFile() : null; 1080 case 0x6bf13a96 -> 1081 name.equalsString(NAME_SOURCE_ID) ? sourceId() : null; 1082 case 0xfa85ee5a -> 1083 name.equalsString(NAME_STACK_MAP_TABLE) ? stackMapTable() : null; 1084 case 0xf2670725 -> 1085 name.equalsString(NAME_SYNTHETIC) ? synthetic() : null; 1086 default -> null; 1087 }; 1088 } 1089 }