1 /* 2 * Copyright (c) 1999, 2025, 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 com.sun.tools.javac.jvm; 27 28 import java.io.*; 29 import java.net.URI; 30 import java.net.URISyntaxException; 31 import java.nio.CharBuffer; 32 import java.nio.file.ClosedFileSystemException; 33 import java.util.Arrays; 34 import java.util.EnumSet; 35 import java.util.HashMap; 36 import java.util.HashSet; 37 import java.util.Map; 38 import java.util.Set; 39 import java.util.function.IntFunction; 40 import java.util.function.Predicate; 41 import java.util.stream.IntStream; 42 43 import javax.lang.model.element.Modifier; 44 import javax.lang.model.element.NestingKind; 45 import javax.tools.JavaFileManager; 46 import javax.tools.JavaFileObject; 47 48 import com.sun.tools.javac.code.Source; 49 import com.sun.tools.javac.code.Source.Feature; 50 import com.sun.tools.javac.comp.Annotate; 51 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter; 52 import com.sun.tools.javac.code.*; 53 import com.sun.tools.javac.code.Directive.*; 54 import com.sun.tools.javac.code.Scope.WriteableScope; 55 import com.sun.tools.javac.code.Symbol.*; 56 import com.sun.tools.javac.code.Symtab; 57 import com.sun.tools.javac.code.Type.*; 58 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata; 59 import com.sun.tools.javac.file.BaseFileManager; 60 import com.sun.tools.javac.file.PathFileObject; 61 import com.sun.tools.javac.jvm.ClassFile.Version; 62 import com.sun.tools.javac.jvm.PoolConstant.NameAndType; 63 import com.sun.tools.javac.main.Option; 64 import com.sun.tools.javac.resources.CompilerProperties; 65 import com.sun.tools.javac.resources.CompilerProperties.Errors; 66 import com.sun.tools.javac.resources.CompilerProperties.Fragments; 67 import com.sun.tools.javac.resources.CompilerProperties.LintWarnings; 68 import com.sun.tools.javac.resources.CompilerProperties.Warnings; 69 import com.sun.tools.javac.tree.JCTree; 70 import com.sun.tools.javac.util.*; 71 import com.sun.tools.javac.util.ByteBuffer.UnderflowException; 72 import com.sun.tools.javac.util.DefinedBy.Api; 73 import com.sun.tools.javac.util.JCDiagnostic.Fragment; 74 75 import static com.sun.tools.javac.code.Flags.*; 76 import static com.sun.tools.javac.code.Kinds.Kind.*; 77 78 import com.sun.tools.javac.code.Scope.LookupKind; 79 80 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE; 81 import static com.sun.tools.javac.code.TypeTag.ARRAY; 82 import static com.sun.tools.javac.code.TypeTag.CLASS; 83 import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 84 import static com.sun.tools.javac.jvm.ClassFile.*; 85 import static com.sun.tools.javac.jvm.ClassFile.Version.*; 86 87 import static com.sun.tools.javac.main.Option.PARAMETERS; 88 89 /** This class provides operations to read a classfile into an internal 90 * representation. The internal representation is anchored in a 91 * ClassSymbol which contains in its scope symbol representations 92 * for all other definitions in the classfile. Top-level Classes themselves 93 * appear as members of the scopes of PackageSymbols. 94 * 95 * <p><b>This is NOT part of any supported API. 96 * If you write code that depends on this, you do so at your own risk. 97 * This code and its internal interfaces are subject to change or 98 * deletion without notice.</b> 99 */ 100 public class ClassReader { 101 /** The context key for the class reader. */ 102 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 103 104 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 105 106 private final Annotate annotate; 107 108 /** Switch: verbose output. 109 */ 110 boolean verbose; 111 112 /** Switch: allow modules. 113 */ 114 boolean allowModules; 115 116 /** Switch: allow value classes. 117 */ 118 boolean allowValueClasses; 119 120 /** Switch: allow sealed 121 */ 122 boolean allowSealedTypes; 123 124 /** Switch: allow records 125 */ 126 boolean allowRecords; 127 128 /** Switch: warn (instead of error) on illegal UTF-8 129 */ 130 boolean warnOnIllegalUtf8; 131 132 /** Switch: preserve parameter names from the variable table. 133 */ 134 public boolean saveParameterNames; 135 136 /** 137 * The currently selected profile. 138 */ 139 public final Profile profile; 140 141 /** The log to use for verbose output 142 */ 143 final Log log; 144 145 /** The symbol table. */ 146 Symtab syms; 147 148 Types types; 149 150 /** The name table. */ 151 final Names names; 152 153 /** Access to files 154 */ 155 private final JavaFileManager fileManager; 156 157 /** Factory for diagnostics 158 */ 159 JCDiagnostic.Factory diagFactory; 160 161 DeferredCompletionFailureHandler dcfh; 162 163 /** 164 * Support for preview language features. 165 */ 166 Preview preview; 167 168 /** The current scope where type variables are entered. 169 */ 170 protected WriteableScope typevars; 171 172 private List<InterimUsesDirective> interimUses = List.nil(); 173 private List<InterimProvidesDirective> interimProvides = List.nil(); 174 175 /** The path name of the class file currently being read. 176 */ 177 protected JavaFileObject currentClassFile = null; 178 179 /** The class or method currently being read. 180 */ 181 protected Symbol currentOwner = null; 182 183 /** The module containing the class currently being read. 184 */ 185 protected ModuleSymbol currentModule = null; 186 187 /** The buffer containing the currently read class file. 188 */ 189 ByteBuffer buf = new ByteBuffer(INITIAL_BUFFER_SIZE); 190 191 /** The current input pointer. 192 */ 193 protected int bp; 194 195 /** The pool reader. 196 */ 197 PoolReader poolReader; 198 199 /** The major version number of the class file being read. */ 200 int majorVersion; 201 /** The minor version number of the class file being read. */ 202 int minorVersion; 203 204 /** true if the class file being read is a preview class file. */ 205 boolean previewClassFile; 206 207 /** UTF-8 validation level */ 208 Convert.Validation utf8validation; 209 210 /** A table to hold the constant pool indices for method parameter 211 * names, as given in LocalVariableTable attributes. 212 */ 213 int[] parameterNameIndicesLvt; 214 215 /** 216 * A table to hold the constant pool indices for method parameter 217 * names, as given in the MethodParameters attribute. 218 */ 219 int[] parameterNameIndicesMp; 220 221 /** 222 * A table to hold the access flags of the method parameters. 223 */ 224 int[] parameterAccessFlags; 225 226 /** 227 * A table to hold the access flags of the method parameters, 228 * for all parameters including synthetic and mandated ones. 229 */ 230 int[] allParameterAccessFlags; 231 232 /** 233 * A table to hold annotations for method parameters. 234 */ 235 ParameterAnnotations[] parameterAnnotations; 236 237 /** 238 * A holder for parameter annotations. 239 */ 240 static class ParameterAnnotations { 241 List<CompoundAnnotationProxy> proxies; 242 243 void add(List<CompoundAnnotationProxy> newAnnotations) { 244 if (proxies == null) { 245 proxies = newAnnotations; 246 } else { 247 proxies = proxies.prependList(newAnnotations); 248 } 249 } 250 } 251 252 /** 253 * The set of attribute names for which warnings have been generated for the current class 254 */ 255 Set<Name> warnedAttrs = new HashSet<>(); 256 257 /** 258 * The prototype @Target Attribute.Compound if this class is an annotation annotated with 259 * {@code @Target} 260 */ 261 CompoundAnnotationProxy target; 262 263 /** 264 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with 265 * {@code @Repeatable} 266 */ 267 CompoundAnnotationProxy repeatable; 268 269 /** Get the ClassReader instance for this invocation. */ 270 public static ClassReader instance(Context context) { 271 ClassReader instance = context.get(classReaderKey); 272 if (instance == null) 273 instance = new ClassReader(context); 274 return instance; 275 } 276 277 /** Construct a new class reader. */ 278 @SuppressWarnings("this-escape") 279 protected ClassReader(Context context) { 280 context.put(classReaderKey, this); 281 annotate = Annotate.instance(context); 282 names = Names.instance(context); 283 syms = Symtab.instance(context); 284 types = Types.instance(context); 285 fileManager = context.get(JavaFileManager.class); 286 if (fileManager == null) 287 throw new AssertionError("FileManager initialization error"); 288 diagFactory = JCDiagnostic.Factory.instance(context); 289 dcfh = DeferredCompletionFailureHandler.instance(context); 290 291 log = Log.instance(context); 292 293 Options options = Options.instance(context); 294 verbose = options.isSet(Option.VERBOSE); 295 296 Source source = Source.instance(context); 297 preview = Preview.instance(context); 298 allowModules = Feature.MODULES.allowedInSource(source); 299 allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) && 300 Feature.VALUE_CLASSES.allowedInSource(source); 301 allowRecords = Feature.RECORDS.allowedInSource(source); 302 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source); 303 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source); 304 305 saveParameterNames = options.isSet(PARAMETERS); 306 307 profile = Profile.instance(context); 308 309 typevars = WriteableScope.create(syms.noSymbol); 310 311 initAttributeReaders(); 312 } 313 314 /** Add member to class unless it is synthetic. 315 */ 316 private void enterMember(ClassSymbol c, Symbol sym) { 317 // Synthetic members are not entered -- reason lost to history (optimization?). 318 // Lambda methods must be entered because they may have inner classes (which reference them) 319 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 320 c.members_field.enter(sym); 321 } 322 323 /* ********************************************************************** 324 * Error Diagnoses 325 ***********************************************************************/ 326 327 public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 328 return badClassFile(diagFactory.fragment(key, args)); 329 } 330 331 public ClassFinder.BadClassFile badClassFile(Fragment fragment) { 332 return badClassFile(diagFactory.fragment(fragment)); 333 } 334 335 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) { 336 return new ClassFinder.BadClassFile ( 337 currentOwner.enclClass(), 338 currentClassFile, 339 diagnostic, 340 diagFactory, 341 dcfh); 342 } 343 344 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) { 345 return new ClassFinder.BadEnclosingMethodAttr ( 346 currentOwner.enclClass(), 347 currentClassFile, 348 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)), 349 diagFactory, 350 dcfh); 351 } 352 353 /* ********************************************************************** 354 * Buffer Access 355 ***********************************************************************/ 356 357 /** Read a character. 358 */ 359 char nextChar() { 360 char res; 361 try { 362 res = buf.getChar(bp); 363 } catch (UnderflowException e) { 364 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 365 } 366 bp += 2; 367 return res; 368 } 369 370 /** Read a byte. 371 */ 372 int nextByte() { 373 try { 374 return buf.getByte(bp++) & 0xFF; 375 } catch (UnderflowException e) { 376 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 377 } 378 } 379 380 /** Read an integer. 381 */ 382 int nextInt() { 383 int res; 384 try { 385 res = buf.getInt(bp); 386 } catch (UnderflowException e) { 387 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 388 } 389 bp += 4; 390 return res; 391 } 392 393 /* ********************************************************************** 394 * Constant Pool Access 395 ***********************************************************************/ 396 397 /** Read module_flags. 398 */ 399 Set<ModuleFlags> readModuleFlags(int flags) { 400 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class); 401 for (ModuleFlags f : ModuleFlags.values()) { 402 if ((flags & f.value) != 0) 403 set.add(f); 404 } 405 return set; 406 } 407 408 /** Read resolution_flags. 409 */ 410 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) { 411 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class); 412 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) { 413 if ((flags & f.value) != 0) 414 set.add(f); 415 } 416 return set; 417 } 418 419 /** Read exports_flags. 420 */ 421 Set<ExportsFlag> readExportsFlags(int flags) { 422 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class); 423 for (ExportsFlag f: ExportsFlag.values()) { 424 if ((flags & f.value) != 0) 425 set.add(f); 426 } 427 return set; 428 } 429 430 /** Read opens_flags. 431 */ 432 Set<OpensFlag> readOpensFlags(int flags) { 433 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class); 434 for (OpensFlag f: OpensFlag.values()) { 435 if ((flags & f.value) != 0) 436 set.add(f); 437 } 438 return set; 439 } 440 441 /** Read requires_flags. 442 */ 443 Set<RequiresFlag> readRequiresFlags(int flags) { 444 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class); 445 for (RequiresFlag f: RequiresFlag.values()) { 446 if ((flags & f.value) != 0) 447 set.add(f); 448 } 449 return set; 450 } 451 452 /* ********************************************************************** 453 * Reading Types 454 ***********************************************************************/ 455 456 /** The unread portion of the currently read type is 457 * signature[sigp..siglimit-1]. 458 */ 459 byte[] signature; 460 int sigp; 461 int siglimit; 462 boolean sigEnterPhase = false; 463 464 /** Convert signature to type, where signature is a byte array segment. 465 */ 466 Type sigToType(byte[] sig, int offset, int len) { 467 signature = sig; 468 sigp = offset; 469 siglimit = offset + len; 470 return sigToType(); 471 } 472 473 /** Convert signature to type, where signature is implicit. 474 */ 475 Type sigToType() { 476 switch ((char) signature[sigp]) { 477 case 'T': 478 sigp++; 479 int start = sigp; 480 while (signature[sigp] != ';') sigp++; 481 sigp++; 482 return sigEnterPhase 483 ? Type.noType 484 : findTypeVar(readName(signature, start, sigp - 1 - start)); 485 case '+': { 486 sigp++; 487 Type t = sigToType(); 488 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 489 } 490 case '*': 491 sigp++; 492 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 493 syms.boundClass); 494 case '-': { 495 sigp++; 496 Type t = sigToType(); 497 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 498 } 499 case 'B': 500 sigp++; 501 return syms.byteType; 502 case 'C': 503 sigp++; 504 return syms.charType; 505 case 'D': 506 sigp++; 507 return syms.doubleType; 508 case 'F': 509 sigp++; 510 return syms.floatType; 511 case 'I': 512 sigp++; 513 return syms.intType; 514 case 'J': 515 sigp++; 516 return syms.longType; 517 case 'L': 518 { 519 // int oldsigp = sigp; 520 Type t = classSigToType(); 521 if (sigp < siglimit && signature[sigp] == '.') 522 throw badClassFile("deprecated inner class signature syntax " + 523 "(please recompile from source)"); 524 /* 525 System.err.println(" decoded " + 526 new String(signature, oldsigp, sigp-oldsigp) + 527 " => " + t + " outer " + t.outer()); 528 */ 529 return t; 530 } 531 case 'S': 532 sigp++; 533 return syms.shortType; 534 case 'V': 535 sigp++; 536 return syms.voidType; 537 case 'Z': 538 sigp++; 539 return syms.booleanType; 540 case '[': 541 sigp++; 542 return new ArrayType(sigToType(), syms.arrayClass); 543 case '(': 544 sigp++; 545 List<Type> argtypes = sigToTypes(')'); 546 Type restype = sigToType(); 547 List<Type> thrown = List.nil(); 548 while (sigp < siglimit && signature[sigp] == '^') { 549 sigp++; 550 thrown = thrown.prepend(sigToType()); 551 } 552 // if there is a typevar in the throws clause we should state it. 553 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 554 if (l.head.hasTag(TYPEVAR)) { 555 l.head.tsym.flags_field |= THROWS; 556 } 557 } 558 return new MethodType(argtypes, 559 restype, 560 thrown.reverse(), 561 syms.methodClass); 562 case '<': 563 typevars = typevars.dup(currentOwner); 564 Type poly = new ForAll(sigToTypeParams(), sigToType()); 565 typevars = typevars.leave(); 566 return poly; 567 default: 568 throw badClassFile("bad.signature", quoteBadSignature()); 569 } 570 } 571 572 byte[] signatureBuffer = new byte[0]; 573 int sbp = 0; 574 /** Convert class signature to type, where signature is implicit. 575 */ 576 Type classSigToType() { 577 if (signature[sigp] != 'L') 578 throw badClassFile("bad.class.signature", quoteBadSignature()); 579 sigp++; 580 Type outer = Type.noType; 581 int startSbp = sbp; 582 583 while (true) { 584 final byte c = signature[sigp++]; 585 switch (c) { 586 587 case ';': { // end 588 ClassSymbol t = enterClass(readName(signatureBuffer, 589 startSbp, 590 sbp - startSbp)); 591 592 try { 593 if (outer == Type.noType) { 594 ClassType et = (ClassType) t.erasure(types); 595 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata()); 596 } 597 return new ClassType(outer, List.nil(), t, List.nil()); 598 } finally { 599 sbp = startSbp; 600 } 601 } 602 603 case '<': // generic arguments 604 ClassSymbol t = enterClass(readName(signatureBuffer, 605 startSbp, 606 sbp - startSbp)); 607 List<Type> actuals = sigToTypes('>'); 608 List<Type> formals = ((ClassType)t.type.tsym.type).typarams_field; 609 if (formals != null) { 610 if (actuals.isEmpty()) 611 actuals = formals; 612 } 613 /* actualsCp is final as it will be captured by the inner class below. We could avoid defining 614 * this additional local variable and depend on field ClassType::typarams_field which `actuals` is 615 * assigned to but then we would have a dependendy on the internal representation of ClassType which 616 * could change in the future 617 */ 618 final List<Type> actualsCp = actuals; 619 outer = new ClassType(outer, actuals, t, List.nil()) { 620 boolean completed = false; 621 boolean typeArgsSet = false; 622 @Override @DefinedBy(Api.LANGUAGE_MODEL) 623 public Type getEnclosingType() { 624 if (!completed) { 625 completed = true; 626 tsym.apiComplete(); 627 Type enclosingType = tsym.type.getEnclosingType(); 628 if (enclosingType != Type.noType) { 629 List<Type> typeArgs = 630 super.getEnclosingType().allparams(); 631 List<Type> typeParams = 632 enclosingType.allparams(); 633 if (typeParams.length() != typeArgs.length()) { 634 // no "rare" types 635 super.setEnclosingType(types.erasure(enclosingType)); 636 } else { 637 super.setEnclosingType(types.subst(enclosingType, 638 typeParams, 639 typeArgs)); 640 } 641 } else { 642 super.setEnclosingType(Type.noType); 643 } 644 } 645 return super.getEnclosingType(); 646 } 647 @Override 648 public void setEnclosingType(Type outer) { 649 throw new UnsupportedOperationException(); 650 } 651 652 @Override 653 public List<Type> getTypeArguments() { 654 if (!typeArgsSet) { 655 typeArgsSet = true; 656 List<Type> formalsCp = ((ClassType)t.type.tsym.type).typarams_field; 657 if (formalsCp != null && !formalsCp.isEmpty()) { 658 if (actualsCp.length() == formalsCp.length()) { 659 List<Type> a = actualsCp; 660 List<Type> f = formalsCp; 661 while (a.nonEmpty()) { 662 a.head = a.head.withTypeVar(f.head); 663 a = a.tail; 664 f = f.tail; 665 } 666 } 667 } 668 } 669 return super.getTypeArguments(); 670 } 671 }; 672 switch (signature[sigp++]) { 673 case ';': 674 if (sigp < siglimit && signature[sigp] == '.') { 675 // support old-style GJC signatures 676 // The signature produced was 677 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 678 // rather than say 679 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 680 // so we skip past ".Lfoo/Outer$" 681 sigp += (sbp - startSbp) + // "foo/Outer" 682 3; // ".L" and "$" 683 signatureBuffer[sbp++] = (byte)'$'; 684 break; 685 } else { 686 sbp = startSbp; 687 return outer; 688 } 689 case '.': 690 signatureBuffer[sbp++] = (byte)'$'; 691 break; 692 default: 693 throw new AssertionError(signature[sigp-1]); 694 } 695 continue; 696 697 case '.': 698 //we have seen an enclosing non-generic class 699 if (outer != Type.noType) { 700 t = enterClass(readName(signatureBuffer, 701 startSbp, 702 sbp - startSbp)); 703 outer = new ClassType(outer, List.nil(), t, List.nil()); 704 } 705 signatureBuffer[sbp++] = (byte)'$'; 706 continue; 707 case '/': 708 signatureBuffer[sbp++] = (byte)'.'; 709 continue; 710 default: 711 signatureBuffer[sbp++] = c; 712 continue; 713 } 714 } 715 } 716 717 /** Quote a bogus signature for display inside an error message. 718 */ 719 String quoteBadSignature() { 720 String sigString; 721 try { 722 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE); 723 } catch (InvalidUtfException e) { 724 throw new AssertionError(e); 725 } 726 if (sigString.length() > 32) 727 sigString = sigString.substring(0, 32) + "..."; 728 return "\"" + sigString + "\""; 729 } 730 731 /** Convert (implicit) signature to list of types 732 * until `terminator' is encountered. 733 */ 734 List<Type> sigToTypes(char terminator) { 735 List<Type> head = List.of(null); 736 List<Type> tail = head; 737 while (signature[sigp] != terminator) 738 tail = tail.setTail(List.of(sigToType())); 739 sigp++; 740 return head.tail; 741 } 742 743 /** Convert signature to type parameters, where signature is a byte 744 * array segment. 745 */ 746 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 747 signature = sig; 748 sigp = offset; 749 siglimit = offset + len; 750 return sigToTypeParams(); 751 } 752 753 /** Convert signature to type parameters, where signature is implicit. 754 */ 755 List<Type> sigToTypeParams() { 756 List<Type> tvars = List.nil(); 757 if (signature[sigp] == '<') { 758 sigp++; 759 int start = sigp; 760 sigEnterPhase = true; 761 while (signature[sigp] != '>') 762 tvars = tvars.prepend(sigToTypeParam()); 763 sigEnterPhase = false; 764 sigp = start; 765 while (signature[sigp] != '>') 766 sigToTypeParam(); 767 sigp++; 768 } 769 return tvars.reverse(); 770 } 771 772 /** Convert (implicit) signature to type parameter. 773 */ 774 Type sigToTypeParam() { 775 int start = sigp; 776 while (signature[sigp] != ':') sigp++; 777 Name name = readName(signature, start, sigp - start); 778 TypeVar tvar; 779 if (sigEnterPhase) { 780 tvar = new TypeVar(name, currentOwner, syms.botType); 781 typevars.enter(tvar.tsym); 782 } else { 783 tvar = (TypeVar)findTypeVar(name); 784 } 785 List<Type> bounds = List.nil(); 786 boolean allInterfaces = false; 787 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 788 sigp++; 789 allInterfaces = true; 790 } 791 while (signature[sigp] == ':') { 792 sigp++; 793 bounds = bounds.prepend(sigToType()); 794 } 795 if (!sigEnterPhase) { 796 types.setBounds(tvar, bounds.reverse(), allInterfaces); 797 } 798 return tvar; 799 } 800 801 /** Find type variable with given name in `typevars' scope. 802 */ 803 Type findTypeVar(Name name) { 804 Symbol s = typevars.findFirst(name); 805 if (s != null) { 806 return s.type; 807 } else { 808 if (readingClassAttr) { 809 // While reading the class attribute, the supertypes 810 // might refer to a type variable from an enclosing element 811 // (method or class). 812 // If the type variable is defined in the enclosing class, 813 // we can actually find it in 814 // currentOwner.owner.type.getTypeArguments() 815 // However, until we have read the enclosing method attribute 816 // we don't know for sure if this owner is correct. It could 817 // be a method and there is no way to tell before reading the 818 // enclosing method attribute. 819 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 820 missingTypeVariables = missingTypeVariables.prepend(t); 821 // System.err.println("Missing type var " + name); 822 return t; 823 } 824 throw badClassFile("undecl.type.var", name); 825 } 826 } 827 828 private Name readName(byte[] buf, int off, int len) { 829 try { 830 return names.fromUtf(buf, off, len, utf8validation); 831 } catch (InvalidUtfException e) { 832 if (warnOnIllegalUtf8) { 833 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile, 834 Fragments.BadUtf8ByteSequenceAt(sigp))); 835 return names.fromUtfLax(buf, off, len); 836 } 837 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp)); 838 } 839 } 840 841 /* ********************************************************************** 842 * Reading Attributes 843 ***********************************************************************/ 844 845 protected enum AttributeKind { CLASS, MEMBER } 846 847 protected abstract class AttributeReader { 848 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 849 this.name = name; 850 this.version = version; 851 this.kinds = kinds; 852 } 853 854 protected boolean accepts(AttributeKind kind) { 855 if (kinds.contains(kind)) { 856 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 857 return true; 858 859 if (!warnedAttrs.contains(name)) { 860 JavaFileObject prev = log.useSource(currentClassFile); 861 try { 862 log.warning(LintWarnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion)); 863 } finally { 864 log.useSource(prev); 865 } 866 warnedAttrs.add(name); 867 } 868 } 869 return false; 870 } 871 872 protected abstract void read(Symbol sym, int attrLen); 873 874 protected final Name name; 875 protected final ClassFile.Version version; 876 protected final Set<AttributeKind> kinds; 877 } 878 879 protected Set<AttributeKind> CLASS_ATTRIBUTE = 880 EnumSet.of(AttributeKind.CLASS); 881 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 882 EnumSet.of(AttributeKind.MEMBER); 883 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 884 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 885 886 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 887 888 private void initAttributeReaders() { 889 AttributeReader[] readers = { 890 // v45.3 attributes 891 892 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 893 protected void read(Symbol sym, int attrLen) { 894 if (saveParameterNames) 895 ((MethodSymbol)sym).code = readCode(sym); 896 else 897 bp = bp + attrLen; 898 } 899 }, 900 901 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 902 protected void read(Symbol sym, int attrLen) { 903 Object v = poolReader.getConstant(nextChar()); 904 // Ignore ConstantValue attribute if field not final. 905 if ((sym.flags() & FINAL) == 0) { 906 return; 907 } 908 VarSymbol var = (VarSymbol) sym; 909 switch (var.type.getTag()) { 910 case BOOLEAN: 911 case BYTE: 912 case CHAR: 913 case SHORT: 914 case INT: 915 checkType(var, Integer.class, v); 916 break; 917 case LONG: 918 checkType(var, Long.class, v); 919 break; 920 case FLOAT: 921 checkType(var, Float.class, v); 922 break; 923 case DOUBLE: 924 checkType(var, Double.class, v); 925 break; 926 case CLASS: 927 if (var.type.tsym == syms.stringType.tsym) { 928 checkType(var, String.class, v); 929 } else { 930 throw badClassFile("bad.constant.value.type", var.type); 931 } 932 break; 933 default: 934 // ignore ConstantValue attribute if type is not primitive or String 935 return; 936 } 937 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) { 938 throw badClassFile("bad.constant.range", v, var, var.type); 939 } 940 var.setData(v); 941 } 942 943 void checkType(Symbol var, Class<?> clazz, Object value) { 944 if (!clazz.isInstance(value)) { 945 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName()); 946 } 947 } 948 }, 949 950 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 951 protected void read(Symbol sym, int attrLen) { 952 Symbol s = sym.owner.kind == MDL ? sym.owner : sym; 953 954 s.flags_field |= DEPRECATED; 955 } 956 }, 957 958 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 959 protected void read(Symbol sym, int attrLen) { 960 int nexceptions = nextChar(); 961 List<Type> thrown = List.nil(); 962 for (int j = 0; j < nexceptions; j++) 963 thrown = thrown.prepend(poolReader.getClass(nextChar()).type); 964 if (sym.type.getThrownTypes().isEmpty()) 965 sym.type.asMethodType().thrown = thrown.reverse(); 966 } 967 }, 968 969 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 970 protected void read(Symbol sym, int attrLen) { 971 ClassSymbol c = (ClassSymbol) sym; 972 if (currentModule.module_info == c) { 973 //prevent entering the classes too soon: 974 skipInnerClasses(); 975 } else { 976 readInnerClasses(c); 977 } 978 } 979 }, 980 981 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 982 protected void read(Symbol sym, int attrLen) { 983 int newbp = bp + attrLen; 984 if (saveParameterNames) { 985 // Pick up parameter names from the variable table. 986 // Parameter names are not explicitly identified as such, 987 // but all parameter name entries in the LocalVariableTable 988 // have a start_pc of 0. Therefore, we record the name 989 // indices of all slots with a start_pc of zero in the 990 // parameterNameIndices array. 991 // Note that this implicitly honors the JVMS spec that 992 // there may be more than one LocalVariableTable, and that 993 // there is no specified ordering for the entries. 994 int numEntries = nextChar(); 995 for (int i = 0; i < numEntries; i++) { 996 int start_pc = nextChar(); 997 int length = nextChar(); 998 int nameIndex = nextChar(); 999 int sigIndex = nextChar(); 1000 int register = nextChar(); 1001 if (start_pc == 0) { 1002 // ensure array large enough 1003 if (register >= parameterNameIndicesLvt.length) { 1004 int newSize = 1005 Math.max(register + 1, parameterNameIndicesLvt.length + 8); 1006 parameterNameIndicesLvt = 1007 Arrays.copyOf(parameterNameIndicesLvt, newSize); 1008 } 1009 parameterNameIndicesLvt[register] = nameIndex; 1010 } 1011 } 1012 } 1013 bp = newbp; 1014 } 1015 }, 1016 1017 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1018 protected void read(Symbol sym, int attrLen) { 1019 ClassSymbol c = (ClassSymbol) sym; 1020 Name n = poolReader.getName(nextChar()); 1021 c.sourcefile = new SourceFileObject(n); 1022 // If the class is a toplevel class, originating from a Java source file, 1023 // but the class name does not match the file name, then it is 1024 // an auxiliary class. 1025 String sn = n.toString(); 1026 if (c.owner.kind == PCK && 1027 sn.endsWith(".java") && 1028 !sn.equals(c.name.toString()+".java")) { 1029 c.flags_field |= AUXILIARY; 1030 } 1031 } 1032 }, 1033 1034 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1035 protected void read(Symbol sym, int attrLen) { 1036 sym.flags_field |= SYNTHETIC; 1037 } 1038 }, 1039 1040 // standard v49 attributes 1041 1042 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1043 protected void read(Symbol sym, int attrLen) { 1044 int newbp = bp + attrLen; 1045 readEnclosingMethodAttr(sym); 1046 bp = newbp; 1047 } 1048 }, 1049 1050 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1051 protected void read(Symbol sym, int attrLen) { 1052 if (sym.kind == TYP) { 1053 ClassSymbol c = (ClassSymbol) sym; 1054 readingClassAttr = true; 1055 try { 1056 ClassType ct1 = (ClassType)c.type; 1057 Assert.check(c == currentOwner); 1058 ct1.typarams_field = poolReader.getName(nextChar()) 1059 .map(ClassReader.this::sigToTypeParams); 1060 ct1.supertype_field = sigToType(); 1061 ListBuffer<Type> is = new ListBuffer<>(); 1062 while (sigp != siglimit) is.append(sigToType()); 1063 ct1.interfaces_field = is.toList(); 1064 } finally { 1065 readingClassAttr = false; 1066 } 1067 } else { 1068 List<Type> thrown = sym.type.getThrownTypes(); 1069 sym.type = poolReader.getType(nextChar()); 1070 //- System.err.println(" # " + sym.type); 1071 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1072 sym.type.asMethodType().thrown = thrown; 1073 1074 } 1075 } 1076 }, 1077 1078 // v49 annotation attributes 1079 1080 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1081 protected void read(Symbol sym, int attrLen) { 1082 attachAnnotationDefault(sym); 1083 } 1084 }, 1085 1086 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1087 protected void read(Symbol sym, int attrLen) { 1088 attachAnnotations(sym); 1089 } 1090 }, 1091 1092 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1093 protected void read(Symbol sym, int attrLen) { 1094 readParameterAnnotations(sym); 1095 } 1096 }, 1097 1098 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1099 protected void read(Symbol sym, int attrLen) { 1100 attachAnnotations(sym); 1101 } 1102 }, 1103 1104 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1105 protected void read(Symbol sym, int attrLen) { 1106 readParameterAnnotations(sym); 1107 } 1108 }, 1109 1110 // additional "legacy" v49 attributes, superseded by flags 1111 1112 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1113 protected void read(Symbol sym, int attrLen) { 1114 sym.flags_field |= ANNOTATION; 1115 } 1116 }, 1117 1118 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1119 protected void read(Symbol sym, int attrLen) { 1120 sym.flags_field |= BRIDGE; 1121 } 1122 }, 1123 1124 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1125 protected void read(Symbol sym, int attrLen) { 1126 sym.flags_field |= ENUM; 1127 } 1128 }, 1129 1130 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1131 protected void read(Symbol sym, int attrLen) { 1132 sym.flags_field |= VARARGS; 1133 } 1134 }, 1135 1136 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1137 protected void read(Symbol sym, int attrLen) { 1138 attachTypeAnnotations(sym); 1139 } 1140 }, 1141 1142 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1143 protected void read(Symbol sym, int attrLen) { 1144 attachTypeAnnotations(sym); 1145 } 1146 }, 1147 1148 // The following attributes for a Code attribute are not currently handled 1149 // StackMapTable 1150 // SourceDebugExtension 1151 // LineNumberTable 1152 // LocalVariableTypeTable 1153 1154 // standard v52 attributes 1155 1156 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1157 protected void read(Symbol sym, int attrlen) { 1158 int newbp = bp + attrlen; 1159 if (saveParameterNames) { 1160 int numEntries = nextByte(); 1161 allParameterAccessFlags = new int[numEntries]; 1162 parameterNameIndicesMp = new int[numEntries]; 1163 parameterAccessFlags = new int[numEntries]; 1164 int allParamIndex = 0; 1165 int index = 0; 1166 for (int i = 0; i < numEntries; i++) { 1167 int nameIndex = nextChar(); 1168 int flags = nextChar(); 1169 allParameterAccessFlags[allParamIndex++] = flags; 1170 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) { 1171 continue; 1172 } 1173 parameterNameIndicesMp[index] = nameIndex; 1174 parameterAccessFlags[index] = flags; 1175 index++; 1176 } 1177 } 1178 bp = newbp; 1179 } 1180 }, 1181 1182 // standard v53 attributes 1183 1184 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) { 1185 @Override 1186 protected boolean accepts(AttributeKind kind) { 1187 return super.accepts(kind) && allowModules; 1188 } 1189 protected void read(Symbol sym, int attrLen) { 1190 if (sym.kind == TYP && sym.owner.kind == MDL) { 1191 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1192 ListBuffer<Directive> directives = new ListBuffer<>(); 1193 1194 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName); 1195 if (currentModule.name != moduleName) { 1196 throw badClassFile("module.name.mismatch", moduleName, currentModule.name); 1197 } 1198 1199 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar()); 1200 msym.flags.addAll(moduleFlags); 1201 msym.version = optPoolEntry(nextChar(), poolReader::getName, null); 1202 1203 ListBuffer<RequiresDirective> requires = new ListBuffer<>(); 1204 int nrequires = nextChar(); 1205 for (int i = 0; i < nrequires; i++) { 1206 ModuleSymbol rsym = poolReader.getModule(nextChar()); 1207 Set<RequiresFlag> flags = readRequiresFlags(nextChar()); 1208 if (rsym == syms.java_base && majorVersion >= V54.major) { 1209 if (flags.contains(RequiresFlag.STATIC_PHASE)) { 1210 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE); 1211 } 1212 } 1213 nextChar(); // skip compiled version 1214 requires.add(new RequiresDirective(rsym, flags)); 1215 } 1216 msym.requires = requires.toList(); 1217 directives.addAll(msym.requires); 1218 1219 ListBuffer<ExportsDirective> exports = new ListBuffer<>(); 1220 int nexports = nextChar(); 1221 for (int i = 0; i < nexports; i++) { 1222 PackageSymbol p = poolReader.getPackage(nextChar()); 1223 Set<ExportsFlag> flags = readExportsFlags(nextChar()); 1224 int nto = nextChar(); 1225 List<ModuleSymbol> to; 1226 if (nto == 0) { 1227 to = null; 1228 } else { 1229 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1230 for (int t = 0; t < nto; t++) 1231 lb.append(poolReader.getModule(nextChar())); 1232 to = lb.toList(); 1233 } 1234 exports.add(new ExportsDirective(p, to, flags)); 1235 } 1236 msym.exports = exports.toList(); 1237 directives.addAll(msym.exports); 1238 ListBuffer<OpensDirective> opens = new ListBuffer<>(); 1239 int nopens = nextChar(); 1240 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) { 1241 throw badClassFile("module.non.zero.opens", currentModule.name); 1242 } 1243 for (int i = 0; i < nopens; i++) { 1244 PackageSymbol p = poolReader.getPackage(nextChar()); 1245 Set<OpensFlag> flags = readOpensFlags(nextChar()); 1246 int nto = nextChar(); 1247 List<ModuleSymbol> to; 1248 if (nto == 0) { 1249 to = null; 1250 } else { 1251 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1252 for (int t = 0; t < nto; t++) 1253 lb.append(poolReader.getModule(nextChar())); 1254 to = lb.toList(); 1255 } 1256 opens.add(new OpensDirective(p, to, flags)); 1257 } 1258 msym.opens = opens.toList(); 1259 directives.addAll(msym.opens); 1260 1261 msym.directives = directives.toList(); 1262 1263 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>(); 1264 int nuses = nextChar(); 1265 for (int i = 0; i < nuses; i++) { 1266 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper); 1267 uses.add(new InterimUsesDirective(srvc)); 1268 } 1269 interimUses = uses.toList(); 1270 1271 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>(); 1272 int nprovides = nextChar(); 1273 for (int p = 0; p < nprovides; p++) { 1274 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper); 1275 int nimpls = nextChar(); 1276 ListBuffer<Name> impls = new ListBuffer<>(); 1277 for (int i = 0; i < nimpls; i++) { 1278 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper)); 1279 provides.add(new InterimProvidesDirective(srvc, impls.toList())); 1280 } 1281 } 1282 interimProvides = provides.toList(); 1283 } 1284 } 1285 1286 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException { 1287 byte[] buf = ClassFile.internalize(arr, offset, length); 1288 try { 1289 return names.fromUtf(buf, 0, buf.length, utf8validation); 1290 } catch (InvalidUtfException e) { 1291 if (warnOnIllegalUtf8) { 1292 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile, 1293 Fragments.BadUtf8ByteSequenceAt(e.getOffset()))); 1294 return names.fromUtfLax(buf, 0, buf.length); 1295 } 1296 throw e; 1297 } 1298 } 1299 }, 1300 1301 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) { 1302 @Override 1303 protected boolean accepts(AttributeKind kind) { 1304 return super.accepts(kind) && allowModules; 1305 } 1306 protected void read(Symbol sym, int attrLen) { 1307 if (sym.kind == TYP && sym.owner.kind == MDL) { 1308 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1309 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar())); 1310 } 1311 } 1312 }, 1313 1314 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) { 1315 @Override 1316 protected boolean accepts(AttributeKind kind) { 1317 return super.accepts(kind) && allowRecords; 1318 } 1319 protected void read(Symbol sym, int attrLen) { 1320 if (sym.kind == TYP) { 1321 sym.flags_field |= RECORD; 1322 } 1323 int componentCount = nextChar(); 1324 ListBuffer<RecordComponent> components = new ListBuffer<>(); 1325 for (int i = 0; i < componentCount; i++) { 1326 Name name = poolReader.getName(nextChar()); 1327 Type type = poolReader.getType(nextChar()); 1328 RecordComponent c = new RecordComponent(name, type, sym); 1329 readAttrs(c, AttributeKind.MEMBER); 1330 components.add(c); 1331 } 1332 ((ClassSymbol) sym).setRecordComponents(components.toList()); 1333 } 1334 }, 1335 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) { 1336 @Override 1337 protected boolean accepts(AttributeKind kind) { 1338 return super.accepts(kind) && allowSealedTypes; 1339 } 1340 protected void read(Symbol sym, int attrLen) { 1341 if (sym.kind == TYP) { 1342 ListBuffer<Symbol> subtypes = new ListBuffer<>(); 1343 int numberOfPermittedSubtypes = nextChar(); 1344 for (int i = 0; i < numberOfPermittedSubtypes; i++) { 1345 subtypes.add(poolReader.getClass(nextChar())); 1346 } 1347 ((ClassSymbol)sym).setPermittedSubclasses(subtypes.toList()); 1348 } 1349 } 1350 }, 1351 }; 1352 1353 for (AttributeReader r: readers) 1354 attributeReaders.put(r.name, r); 1355 } 1356 1357 protected void readEnclosingMethodAttr(Symbol sym) { 1358 // sym is a nested class with an "Enclosing Method" attribute 1359 // remove sym from it's current owners scope and place it in 1360 // the scope specified by the attribute 1361 sym.owner.members().remove(sym); 1362 ClassSymbol self = (ClassSymbol)sym; 1363 ClassSymbol c = poolReader.getClass(nextChar()); 1364 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null); 1365 1366 if (c.members_field == null || c.kind != TYP) 1367 throw badClassFile("bad.enclosing.class", self, c); 1368 1369 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1370 if (nt != null && m == null) 1371 throw badEnclosingMethod(self); 1372 1373 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1374 self.owner = m != null ? m : c; 1375 if (self.name.isEmpty()) 1376 self.fullname = names.empty; 1377 else 1378 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1379 1380 if (m != null) { 1381 ((ClassType)sym.type).setEnclosingType(m.type); 1382 } else if ((self.flags_field & STATIC) == 0) { 1383 ((ClassType)sym.type).setEnclosingType(c.type); 1384 } else { 1385 ((ClassType)sym.type).setEnclosingType(Type.noType); 1386 } 1387 enterTypevars(self, self.type); 1388 if (!missingTypeVariables.isEmpty()) { 1389 ListBuffer<Type> typeVars = new ListBuffer<>(); 1390 for (Type typevar : missingTypeVariables) { 1391 typeVars.append(findTypeVar(typevar.tsym.name)); 1392 } 1393 foundTypeVariables = typeVars.toList(); 1394 } else { 1395 foundTypeVariables = List.nil(); 1396 } 1397 } 1398 1399 // See java.lang.Class 1400 private Name simpleBinaryName(Name self, Name enclosing) { 1401 if (!self.startsWith(enclosing)) { 1402 throw badClassFile("bad.enclosing.method", self); 1403 } 1404 1405 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1406 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1407 throw badClassFile("bad.enclosing.method", self); 1408 int index = 1; 1409 while (index < simpleBinaryName.length() && 1410 isAsciiDigit(simpleBinaryName.charAt(index))) 1411 index++; 1412 return names.fromString(simpleBinaryName.substring(index)); 1413 } 1414 1415 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1416 if (nt == null) 1417 return null; 1418 1419 MethodType type = nt.type.asMethodType(); 1420 1421 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1422 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1423 return (MethodSymbol)sym; 1424 } 1425 1426 if (nt.name != names.init) 1427 // not a constructor 1428 return null; 1429 if ((flags & INTERFACE) != 0) 1430 // no enclosing instance 1431 return null; 1432 if (nt.type.getParameterTypes().isEmpty()) 1433 // no parameters 1434 return null; 1435 1436 // A constructor of an inner class. 1437 // Remove the first argument (the enclosing instance) 1438 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail, 1439 nt.type.getReturnType(), 1440 nt.type.getThrownTypes(), 1441 syms.methodClass)); 1442 // Try searching again 1443 return findMethod(nt, scope, flags); 1444 } 1445 1446 /** Similar to Types.isSameType but avoids completion */ 1447 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1448 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1449 .prepend(types.erasure(mt1.getReturnType())); 1450 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1451 while (!types1.isEmpty() && !types2.isEmpty()) { 1452 if (types1.head.tsym != types2.head.tsym) 1453 return false; 1454 types1 = types1.tail; 1455 types2 = types2.tail; 1456 } 1457 return types1.isEmpty() && types2.isEmpty(); 1458 } 1459 1460 /** 1461 * Character.isDigit answers <tt>true</tt> to some non-ascii 1462 * digits. This one does not. <b>copied from java.lang.Class</b> 1463 */ 1464 private static boolean isAsciiDigit(char c) { 1465 return '0' <= c && c <= '9'; 1466 } 1467 1468 /** Read member attributes. 1469 */ 1470 void readMemberAttrs(Symbol sym) { 1471 readAttrs(sym, AttributeKind.MEMBER); 1472 } 1473 1474 void readAttrs(Symbol sym, AttributeKind kind) { 1475 char ac = nextChar(); 1476 for (int i = 0; i < ac; i++) { 1477 Name attrName = poolReader.getName(nextChar()); 1478 int attrLen = nextInt(); 1479 AttributeReader r = attributeReaders.get(attrName); 1480 if (r != null && r.accepts(kind)) 1481 r.read(sym, attrLen); 1482 else { 1483 bp = bp + attrLen; 1484 } 1485 } 1486 } 1487 1488 private boolean readingClassAttr = false; 1489 private List<Type> missingTypeVariables = List.nil(); 1490 private List<Type> foundTypeVariables = List.nil(); 1491 1492 /** Read class attributes. 1493 */ 1494 void readClassAttrs(ClassSymbol c) { 1495 readAttrs(c, AttributeKind.CLASS); 1496 } 1497 1498 /** Read code block. 1499 */ 1500 Code readCode(Symbol owner) { 1501 nextChar(); // max_stack 1502 nextChar(); // max_locals 1503 final int code_length = nextInt(); 1504 bp += code_length; 1505 final char exception_table_length = nextChar(); 1506 bp += exception_table_length * 8; 1507 readMemberAttrs(owner); 1508 return null; 1509 } 1510 1511 /* ********************************************************************** 1512 * Reading Java-language annotations 1513 ***********************************************************************/ 1514 1515 /** 1516 * Save annotations. 1517 */ 1518 List<CompoundAnnotationProxy> readAnnotations() { 1519 int numAttributes = nextChar(); 1520 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>(); 1521 for (int i = 0; i < numAttributes; i++) { 1522 annotations.append(readCompoundAnnotation()); 1523 } 1524 return annotations.toList(); 1525 } 1526 1527 /** Attach annotations. 1528 */ 1529 void attachAnnotations(final Symbol sym) { 1530 attachAnnotations(sym, readAnnotations()); 1531 } 1532 1533 /** 1534 * Attach annotations. 1535 */ 1536 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) { 1537 if (annotations.isEmpty()) { 1538 return; 1539 } 1540 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1541 for (CompoundAnnotationProxy proxy : annotations) { 1542 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName()) 1543 sym.flags_field |= PROPRIETARY; 1544 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) { 1545 if (profile != Profile.DEFAULT) { 1546 for (Pair<Name, Attribute> v : proxy.values) { 1547 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) { 1548 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) { 1549 sym.flags_field |= NOT_IN_PROFILE; 1550 } 1551 } 1552 } 1553 } 1554 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) { 1555 sym.flags_field |= PREVIEW_API; 1556 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE); 1557 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) { 1558 Assert.check(sym.kind == TYP); 1559 sym.flags_field |= VALUE_BASED; 1560 } else if (proxy.type.tsym.flatName() == syms.migratedValueClassInternalType.tsym.flatName()) { 1561 Assert.check(sym.kind == TYP); 1562 sym.flags_field |= MIGRATED_VALUE_CLASS; 1563 if (needsValueFlag(sym, sym.flags_field)) { 1564 sym.flags_field |= VALUE_CLASS; 1565 sym.flags_field &= ~IDENTITY_TYPE; 1566 } 1567 } else if (proxy.type.tsym.flatName() == syms.restrictedInternalType.tsym.flatName()) { 1568 Assert.check(sym.kind == MTH); 1569 sym.flags_field |= RESTRICTED; 1570 } else if (proxy.type.tsym.flatName() == syms.requiresIdentityInternalType.tsym.flatName()) { 1571 Assert.check(sym.kind == VAR); 1572 sym.flags_field |= REQUIRES_IDENTITY; 1573 } else { 1574 if (proxy.type.tsym == syms.annotationTargetType.tsym) { 1575 target = proxy; 1576 } else if (proxy.type.tsym == syms.repeatableType.tsym) { 1577 repeatable = proxy; 1578 } else if (proxy.type.tsym == syms.deprecatedType.tsym) { 1579 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 1580 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL); 1581 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) { 1582 sym.flags_field |= PREVIEW_API; 1583 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE); 1584 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) { 1585 sym.flags_field |= VALUE_BASED; 1586 } else if (proxy.type.tsym == syms.migratedValueClassType.tsym && sym.kind == TYP) { 1587 sym.flags_field |= MIGRATED_VALUE_CLASS; 1588 if (needsValueFlag(sym, sym.flags_field)) { 1589 sym.flags_field |= VALUE_CLASS; 1590 sym.flags_field &= ~IDENTITY_TYPE; 1591 } 1592 } else if (proxy.type.tsym == syms.restrictedType.tsym) { 1593 Assert.check(sym.kind == MTH); 1594 sym.flags_field |= RESTRICTED; 1595 } else if (proxy.type.tsym == syms.requiresIdentityType.tsym) { 1596 Assert.check(sym.kind == VAR); 1597 sym.flags_field |= REQUIRES_IDENTITY; 1598 } 1599 proxies.append(proxy); 1600 } 1601 } 1602 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1603 } 1604 //where: 1605 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) { 1606 for (Pair<Name, Attribute> v : proxy.values) { 1607 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) { 1608 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) { 1609 sym.flags_field |= flag; 1610 } 1611 } 1612 } 1613 } 1614 1615 /** Read parameter annotations. 1616 */ 1617 void readParameterAnnotations(Symbol meth) { 1618 int numParameters; 1619 try { 1620 numParameters = buf.getByte(bp++) & 0xFF; 1621 } catch (UnderflowException e) { 1622 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 1623 } 1624 if (parameterAnnotations == null) { 1625 parameterAnnotations = new ParameterAnnotations[numParameters]; 1626 } else if (parameterAnnotations.length != numParameters) { 1627 //the RuntimeVisibleParameterAnnotations and RuntimeInvisibleParameterAnnotations 1628 //provide annotations for a different number of parameters, ignore: 1629 log.warning(LintWarnings.RuntimeVisibleInvisibleParamAnnotationsMismatch(currentClassFile)); 1630 for (int pnum = 0; pnum < numParameters; pnum++) { 1631 readAnnotations(); 1632 } 1633 parameterAnnotations = null; 1634 return ; 1635 } 1636 for (int pnum = 0; pnum < numParameters; pnum++) { 1637 if (parameterAnnotations[pnum] == null) { 1638 parameterAnnotations[pnum] = new ParameterAnnotations(); 1639 } 1640 parameterAnnotations[pnum].add(readAnnotations()); 1641 } 1642 } 1643 1644 void attachTypeAnnotations(final Symbol sym) { 1645 int numAttributes = nextChar(); 1646 if (numAttributes != 0) { 1647 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1648 for (int i = 0; i < numAttributes; i++) 1649 proxies.append(readTypeAnnotation()); 1650 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1651 } 1652 } 1653 1654 /** Attach the default value for an annotation element. 1655 */ 1656 void attachAnnotationDefault(final Symbol sym) { 1657 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1658 final Attribute value = readAttributeValue(); 1659 1660 // The default value is set later during annotation. It might 1661 // be the case that the Symbol sym is annotated _after_ the 1662 // repeating instances that depend on this default value, 1663 // because of this we set an interim value that tells us this 1664 // element (most likely) has a default. 1665 // 1666 // Set interim value for now, reset just before we do this 1667 // properly at annotate time. 1668 meth.defaultValue = value; 1669 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1670 } 1671 1672 Type readTypeOrClassSymbol(int i) { 1673 return readTypeToProxy(i); 1674 } 1675 Type readTypeToProxy(int i) { 1676 if (currentModule.module_info == currentOwner) { 1677 return new ProxyType(i); 1678 } else { 1679 return poolReader.getType(i); 1680 } 1681 } 1682 1683 CompoundAnnotationProxy readCompoundAnnotation() { 1684 Type t; 1685 if (currentModule.module_info == currentOwner) { 1686 int cpIndex = nextChar(); 1687 t = new ProxyType(cpIndex); 1688 } else { 1689 t = readTypeOrClassSymbol(nextChar()); 1690 } 1691 int numFields = nextChar(); 1692 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1693 for (int i=0; i<numFields; i++) { 1694 Name name = poolReader.getName(nextChar()); 1695 Attribute value = readAttributeValue(); 1696 pairs.append(new Pair<>(name, value)); 1697 } 1698 return new CompoundAnnotationProxy(t, pairs.toList()); 1699 } 1700 1701 TypeAnnotationProxy readTypeAnnotation() { 1702 TypeAnnotationPosition position = readPosition(); 1703 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1704 1705 return new TypeAnnotationProxy(proxy, position); 1706 } 1707 1708 TypeAnnotationPosition readPosition() { 1709 int tag = nextByte(); // TargetType tag is a byte 1710 1711 if (!TargetType.isValidTargetTypeValue(tag)) 1712 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1713 1714 TargetType type = TargetType.fromTargetTypeValue(tag); 1715 1716 switch (type) { 1717 // instanceof 1718 case INSTANCEOF: { 1719 final int offset = nextChar(); 1720 final TypeAnnotationPosition position = 1721 TypeAnnotationPosition.instanceOf(readTypePath()); 1722 position.offset = offset; 1723 return position; 1724 } 1725 // new expression 1726 case NEW: { 1727 final int offset = nextChar(); 1728 final TypeAnnotationPosition position = 1729 TypeAnnotationPosition.newObj(readTypePath()); 1730 position.offset = offset; 1731 return position; 1732 } 1733 // constructor/method reference receiver 1734 case CONSTRUCTOR_REFERENCE: { 1735 final int offset = nextChar(); 1736 final TypeAnnotationPosition position = 1737 TypeAnnotationPosition.constructorRef(readTypePath()); 1738 position.offset = offset; 1739 return position; 1740 } 1741 case METHOD_REFERENCE: { 1742 final int offset = nextChar(); 1743 final TypeAnnotationPosition position = 1744 TypeAnnotationPosition.methodRef(readTypePath()); 1745 position.offset = offset; 1746 return position; 1747 } 1748 // local variable 1749 case LOCAL_VARIABLE: { 1750 final int table_length = nextChar(); 1751 final int[] newLvarOffset = new int[table_length]; 1752 final int[] newLvarLength = new int[table_length]; 1753 final int[] newLvarIndex = new int[table_length]; 1754 1755 for (int i = 0; i < table_length; ++i) { 1756 newLvarOffset[i] = nextChar(); 1757 newLvarLength[i] = nextChar(); 1758 newLvarIndex[i] = nextChar(); 1759 } 1760 1761 final TypeAnnotationPosition position = 1762 TypeAnnotationPosition.localVariable(readTypePath()); 1763 position.lvarOffset = newLvarOffset; 1764 position.lvarLength = newLvarLength; 1765 position.lvarIndex = newLvarIndex; 1766 return position; 1767 } 1768 // resource variable 1769 case RESOURCE_VARIABLE: { 1770 final int table_length = nextChar(); 1771 final int[] newLvarOffset = new int[table_length]; 1772 final int[] newLvarLength = new int[table_length]; 1773 final int[] newLvarIndex = new int[table_length]; 1774 1775 for (int i = 0; i < table_length; ++i) { 1776 newLvarOffset[i] = nextChar(); 1777 newLvarLength[i] = nextChar(); 1778 newLvarIndex[i] = nextChar(); 1779 } 1780 1781 final TypeAnnotationPosition position = 1782 TypeAnnotationPosition.resourceVariable(readTypePath()); 1783 position.lvarOffset = newLvarOffset; 1784 position.lvarLength = newLvarLength; 1785 position.lvarIndex = newLvarIndex; 1786 return position; 1787 } 1788 // exception parameter 1789 case EXCEPTION_PARAMETER: { 1790 final int exception_index = nextChar(); 1791 final TypeAnnotationPosition position = 1792 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1793 position.setExceptionIndex(exception_index); 1794 return position; 1795 } 1796 // method receiver 1797 case METHOD_RECEIVER: 1798 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1799 // type parameter 1800 case CLASS_TYPE_PARAMETER: { 1801 final int parameter_index = nextByte(); 1802 return TypeAnnotationPosition 1803 .typeParameter(readTypePath(), parameter_index); 1804 } 1805 case METHOD_TYPE_PARAMETER: { 1806 final int parameter_index = nextByte(); 1807 return TypeAnnotationPosition 1808 .methodTypeParameter(readTypePath(), parameter_index); 1809 } 1810 // type parameter bound 1811 case CLASS_TYPE_PARAMETER_BOUND: { 1812 final int parameter_index = nextByte(); 1813 final int bound_index = nextByte(); 1814 return TypeAnnotationPosition 1815 .typeParameterBound(readTypePath(), parameter_index, 1816 bound_index); 1817 } 1818 case METHOD_TYPE_PARAMETER_BOUND: { 1819 final int parameter_index = nextByte(); 1820 final int bound_index = nextByte(); 1821 return TypeAnnotationPosition 1822 .methodTypeParameterBound(readTypePath(), parameter_index, 1823 bound_index); 1824 } 1825 // class extends or implements clause 1826 case CLASS_EXTENDS: { 1827 final int type_index = nextChar(); 1828 return TypeAnnotationPosition.classExtends(readTypePath(), 1829 type_index); 1830 } 1831 // throws 1832 case THROWS: { 1833 final int type_index = nextChar(); 1834 return TypeAnnotationPosition.methodThrows(readTypePath(), 1835 type_index); 1836 } 1837 // method parameter 1838 case METHOD_FORMAL_PARAMETER: { 1839 final int parameter_index = nextByte(); 1840 return TypeAnnotationPosition.methodParameter(readTypePath(), 1841 parameter_index); 1842 } 1843 // type cast 1844 case CAST: { 1845 final int offset = nextChar(); 1846 final int type_index = nextByte(); 1847 final TypeAnnotationPosition position = 1848 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1849 position.offset = offset; 1850 return position; 1851 } 1852 // method/constructor/reference type argument 1853 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1854 final int offset = nextChar(); 1855 final int type_index = nextByte(); 1856 final TypeAnnotationPosition position = TypeAnnotationPosition 1857 .constructorInvocationTypeArg(readTypePath(), type_index); 1858 position.offset = offset; 1859 return position; 1860 } 1861 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1862 final int offset = nextChar(); 1863 final int type_index = nextByte(); 1864 final TypeAnnotationPosition position = TypeAnnotationPosition 1865 .methodInvocationTypeArg(readTypePath(), type_index); 1866 position.offset = offset; 1867 return position; 1868 } 1869 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1870 final int offset = nextChar(); 1871 final int type_index = nextByte(); 1872 final TypeAnnotationPosition position = TypeAnnotationPosition 1873 .constructorRefTypeArg(readTypePath(), type_index); 1874 position.offset = offset; 1875 return position; 1876 } 1877 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1878 final int offset = nextChar(); 1879 final int type_index = nextByte(); 1880 final TypeAnnotationPosition position = TypeAnnotationPosition 1881 .methodRefTypeArg(readTypePath(), type_index); 1882 position.offset = offset; 1883 return position; 1884 } 1885 // We don't need to worry about these 1886 case METHOD_RETURN: 1887 return TypeAnnotationPosition.methodReturn(readTypePath()); 1888 case FIELD: 1889 return TypeAnnotationPosition.field(readTypePath()); 1890 case UNKNOWN: 1891 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1892 default: 1893 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1894 } 1895 } 1896 1897 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1898 int len = nextByte(); 1899 ListBuffer<Integer> loc = new ListBuffer<>(); 1900 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1901 loc = loc.append(nextByte()); 1902 1903 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1904 1905 } 1906 1907 /** 1908 * Helper function to read an optional pool entry (with given function); this is used while parsing 1909 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor, 1910 * as per JVMS. 1911 */ 1912 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) { 1913 return (index == 0) ? 1914 defaultValue : 1915 poolFunc.apply(index); 1916 } 1917 1918 Attribute readAttributeValue() { 1919 char c; 1920 try { 1921 c = (char)buf.getByte(bp++); 1922 } catch (UnderflowException e) { 1923 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 1924 } 1925 switch (c) { 1926 case 'B': 1927 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar())); 1928 case 'C': 1929 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar())); 1930 case 'D': 1931 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar())); 1932 case 'F': 1933 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar())); 1934 case 'I': 1935 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar())); 1936 case 'J': 1937 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar())); 1938 case 'S': 1939 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar())); 1940 case 'Z': 1941 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar())); 1942 case 's': 1943 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString()); 1944 case 'e': 1945 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar())); 1946 case 'c': 1947 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar())); 1948 case '[': { 1949 int n = nextChar(); 1950 ListBuffer<Attribute> l = new ListBuffer<>(); 1951 for (int i=0; i<n; i++) 1952 l.append(readAttributeValue()); 1953 return new ArrayAttributeProxy(l.toList()); 1954 } 1955 case '@': 1956 return readCompoundAnnotation(); 1957 default: 1958 throw new AssertionError("unknown annotation tag '" + c + "'"); 1959 } 1960 } 1961 1962 interface ProxyVisitor extends Attribute.Visitor { 1963 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1964 void visitClassAttributeProxy(ClassAttributeProxy proxy); 1965 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1966 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1967 } 1968 1969 static class EnumAttributeProxy extends Attribute { 1970 Type enumType; 1971 Name enumerator; 1972 public EnumAttributeProxy(Type enumType, Name enumerator) { 1973 super(null); 1974 this.enumType = enumType; 1975 this.enumerator = enumerator; 1976 } 1977 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1978 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1979 public String toString() { 1980 return "/*proxy enum*/" + enumType + "." + enumerator; 1981 } 1982 } 1983 1984 static class ClassAttributeProxy extends Attribute { 1985 Type classType; 1986 public ClassAttributeProxy(Type classType) { 1987 super(null); 1988 this.classType = classType; 1989 } 1990 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); } 1991 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1992 public String toString() { 1993 return "/*proxy class*/" + classType + ".class"; 1994 } 1995 } 1996 1997 static class ArrayAttributeProxy extends Attribute { 1998 List<Attribute> values; 1999 ArrayAttributeProxy(List<Attribute> values) { 2000 super(null); 2001 this.values = values; 2002 } 2003 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 2004 @Override @DefinedBy(Api.LANGUAGE_MODEL) 2005 public String toString() { 2006 return "{" + values + "}"; 2007 } 2008 } 2009 2010 /** A temporary proxy representing a compound attribute. 2011 */ 2012 static class CompoundAnnotationProxy extends Attribute { 2013 final List<Pair<Name,Attribute>> values; 2014 public CompoundAnnotationProxy(Type type, 2015 List<Pair<Name,Attribute>> values) { 2016 super(type); 2017 this.values = values; 2018 } 2019 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 2020 @Override @DefinedBy(Api.LANGUAGE_MODEL) 2021 public String toString() { 2022 StringBuilder buf = new StringBuilder(); 2023 buf.append("@"); 2024 buf.append(type.tsym.getQualifiedName()); 2025 buf.append("/*proxy*/{"); 2026 boolean first = true; 2027 for (List<Pair<Name,Attribute>> v = values; 2028 v.nonEmpty(); v = v.tail) { 2029 Pair<Name,Attribute> value = v.head; 2030 if (!first) buf.append(","); 2031 first = false; 2032 buf.append(value.fst); 2033 buf.append("="); 2034 buf.append(value.snd); 2035 } 2036 buf.append("}"); 2037 return buf.toString(); 2038 } 2039 } 2040 2041 /** A temporary proxy representing a type annotation. 2042 */ 2043 static class TypeAnnotationProxy { 2044 final CompoundAnnotationProxy compound; 2045 final TypeAnnotationPosition position; 2046 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 2047 TypeAnnotationPosition position) { 2048 this.compound = compound; 2049 this.position = position; 2050 } 2051 } 2052 2053 class AnnotationDeproxy implements ProxyVisitor { 2054 private ClassSymbol requestingOwner; 2055 2056 AnnotationDeproxy(ClassSymbol owner) { 2057 this.requestingOwner = owner; 2058 } 2059 2060 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 2061 // also must fill in types!!!! 2062 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 2063 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 2064 buf.append(deproxyCompound(l.head)); 2065 } 2066 return buf.toList(); 2067 } 2068 2069 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 2070 Type annotationType = resolvePossibleProxyType(a.type); 2071 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 2072 for (List<Pair<Name,Attribute>> l = a.values; 2073 l.nonEmpty(); 2074 l = l.tail) { 2075 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst); 2076 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 2077 } 2078 return new Attribute.Compound(annotationType, buf.toList()); 2079 } 2080 2081 MethodSymbol findAccessMethod(Type container, Name name) { 2082 CompletionFailure failure = null; 2083 try { 2084 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 2085 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 2086 return (MethodSymbol) sym; 2087 } 2088 } catch (CompletionFailure ex) { 2089 failure = ex; 2090 } 2091 // The method wasn't found: emit a warning and recover 2092 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 2093 try { 2094 if (failure == null) { 2095 log.warning(LintWarnings.AnnotationMethodNotFound(container, name)); 2096 } else { 2097 log.warning(LintWarnings.AnnotationMethodNotFoundReason(container, 2098 name, 2099 failure.getDetailValue()));//diagnostic, if present 2100 } 2101 } finally { 2102 log.useSource(prevSource); 2103 } 2104 // Construct a new method type and symbol. Use bottom 2105 // type (typeof null) as return type because this type is 2106 // a subtype of all reference types and can be converted 2107 // to primitive types by unboxing. 2108 MethodType mt = new MethodType(List.nil(), 2109 syms.botType, 2110 List.nil(), 2111 syms.methodClass); 2112 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 2113 } 2114 2115 Attribute result; 2116 Type type; 2117 Attribute deproxy(Type t, Attribute a) { 2118 Type oldType = type; 2119 try { 2120 type = t; 2121 a.accept(this); 2122 return result; 2123 } finally { 2124 type = oldType; 2125 } 2126 } 2127 2128 // implement Attribute.Visitor below 2129 2130 public void visitConstant(Attribute.Constant value) { 2131 // assert value.type == type; 2132 result = value; 2133 } 2134 2135 public void visitClass(Attribute.Class clazz) { 2136 result = clazz; 2137 } 2138 2139 public void visitEnum(Attribute.Enum e) { 2140 throw new AssertionError(); // shouldn't happen 2141 } 2142 2143 public void visitCompound(Attribute.Compound compound) { 2144 throw new AssertionError(); // shouldn't happen 2145 } 2146 2147 public void visitArray(Attribute.Array array) { 2148 throw new AssertionError(); // shouldn't happen 2149 } 2150 2151 public void visitError(Attribute.Error e) { 2152 throw new AssertionError(); // shouldn't happen 2153 } 2154 2155 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 2156 // type.tsym.flatName() should == proxy.enumFlatName 2157 Type enumType = resolvePossibleProxyType(proxy.enumType); 2158 TypeSymbol enumTypeSym = enumType.tsym; 2159 VarSymbol enumerator = null; 2160 CompletionFailure failure = null; 2161 try { 2162 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 2163 if (sym.kind == VAR) { 2164 enumerator = (VarSymbol)sym; 2165 break; 2166 } 2167 } 2168 } 2169 catch (CompletionFailure ex) { 2170 failure = ex; 2171 } 2172 if (enumerator == null) { 2173 if (failure != null) { 2174 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile, 2175 enumTypeSym, 2176 proxy.enumerator, 2177 failure.getDiagnostic())); 2178 } else { 2179 log.warning(Warnings.UnknownEnumConstant(currentClassFile, 2180 enumTypeSym, 2181 proxy.enumerator)); 2182 } 2183 result = new Attribute.Enum(enumTypeSym.type, 2184 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 2185 } else { 2186 result = new Attribute.Enum(enumTypeSym.type, enumerator); 2187 } 2188 } 2189 2190 @Override 2191 public void visitClassAttributeProxy(ClassAttributeProxy proxy) { 2192 Type classType = resolvePossibleProxyType(proxy.classType); 2193 result = new Attribute.Class(types, classType); 2194 } 2195 2196 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 2197 int length = proxy.values.length(); 2198 Attribute[] ats = new Attribute[length]; 2199 Type elemtype = types.elemtype(type); 2200 int i = 0; 2201 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 2202 ats[i++] = deproxy(elemtype, p.head); 2203 } 2204 result = new Attribute.Array(type, ats); 2205 } 2206 2207 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 2208 result = deproxyCompound(proxy); 2209 } 2210 2211 Type resolvePossibleProxyType(Type t) { 2212 if (t instanceof ProxyType proxyType) { 2213 Assert.check(requestingOwner.owner instanceof ModuleSymbol); 2214 ModuleSymbol prevCurrentModule = currentModule; 2215 currentModule = (ModuleSymbol) requestingOwner.owner; 2216 try { 2217 return proxyType.resolve(); 2218 } finally { 2219 currentModule = prevCurrentModule; 2220 } 2221 } else { 2222 return t; 2223 } 2224 } 2225 } 2226 2227 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable { 2228 final MethodSymbol sym; 2229 final Attribute value; 2230 final JavaFileObject classFile = currentClassFile; 2231 2232 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 2233 super(currentOwner.kind == MTH 2234 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2235 this.sym = sym; 2236 this.value = value; 2237 } 2238 2239 @Override 2240 public void run() { 2241 JavaFileObject previousClassFile = currentClassFile; 2242 try { 2243 // Reset the interim value set earlier in 2244 // attachAnnotationDefault(). 2245 sym.defaultValue = null; 2246 currentClassFile = classFile; 2247 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 2248 } finally { 2249 currentClassFile = previousClassFile; 2250 } 2251 } 2252 2253 @Override 2254 public String toString() { 2255 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 2256 } 2257 } 2258 2259 class AnnotationCompleter extends AnnotationDeproxy implements Runnable { 2260 final Symbol sym; 2261 final List<CompoundAnnotationProxy> l; 2262 final JavaFileObject classFile; 2263 2264 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 2265 super(currentOwner.kind == MTH 2266 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2267 if (sym.kind == TYP && sym.owner.kind == MDL) { 2268 this.sym = sym.owner; 2269 } else { 2270 this.sym = sym; 2271 } 2272 this.l = l; 2273 this.classFile = currentClassFile; 2274 } 2275 2276 @Override 2277 public void run() { 2278 JavaFileObject previousClassFile = currentClassFile; 2279 try { 2280 currentClassFile = classFile; 2281 List<Attribute.Compound> newList = deproxyCompoundList(l); 2282 for (Attribute.Compound attr : newList) { 2283 if (attr.type.tsym == syms.deprecatedType.tsym) { 2284 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 2285 Attribute forRemoval = attr.member(names.forRemoval); 2286 if (forRemoval instanceof Attribute.Constant constant) { 2287 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) { 2288 sym.flags_field |= DEPRECATED_REMOVAL; 2289 } 2290 } 2291 } 2292 } 2293 if (sym.annotationsPendingCompletion()) { 2294 sym.setDeclarationAttributes(newList); 2295 } else { 2296 sym.appendAttributes(newList); 2297 } 2298 } finally { 2299 currentClassFile = previousClassFile; 2300 } 2301 } 2302 2303 @Override 2304 public String toString() { 2305 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 2306 } 2307 } 2308 2309 class TypeAnnotationCompleter extends AnnotationCompleter { 2310 2311 List<TypeAnnotationProxy> proxies; 2312 2313 TypeAnnotationCompleter(Symbol sym, 2314 List<TypeAnnotationProxy> proxies) { 2315 super(sym, List.nil()); 2316 this.proxies = proxies; 2317 } 2318 2319 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 2320 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 2321 for (TypeAnnotationProxy proxy: proxies) { 2322 Attribute.Compound compound = deproxyCompound(proxy.compound); 2323 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 2324 buf.add(typeCompound); 2325 } 2326 return buf.toList(); 2327 } 2328 2329 @Override 2330 public void run() { 2331 JavaFileObject previousClassFile = currentClassFile; 2332 try { 2333 currentClassFile = classFile; 2334 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 2335 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 2336 addTypeAnnotationsToSymbol(sym, newList); 2337 } finally { 2338 currentClassFile = previousClassFile; 2339 } 2340 } 2341 } 2342 2343 /** 2344 * Rewrites types in the given symbol to include type annotations. 2345 * 2346 * <p>The list of type annotations includes annotations for all types in the signature of the 2347 * symbol. Associating the annotations with the correct type requires interpreting the JVMS 2348 * 4.7.20-A target_type to locate the correct type to rewrite, and then interpreting the JVMS 2349 * 4.7.20.2 type_path to associate the annotation with the correct contained type. 2350 */ 2351 private void addTypeAnnotationsToSymbol(Symbol s, List<Attribute.TypeCompound> attributes) { 2352 try { 2353 new TypeAnnotationSymbolVisitor(attributes).visit(s, null); 2354 } catch (CompletionFailure ex) { 2355 JavaFileObject prev = log.useSource(currentClassFile); 2356 try { 2357 log.error(Errors.CantAttachTypeAnnotations(attributes, s.owner, s.name, ex.getDetailValue())); 2358 } finally { 2359 log.useSource(prev); 2360 } 2361 } 2362 } 2363 2364 private static class TypeAnnotationSymbolVisitor 2365 extends Types.DefaultSymbolVisitor<Void, Void> { 2366 2367 private final List<Attribute.TypeCompound> attributes; 2368 2369 private TypeAnnotationSymbolVisitor(List<Attribute.TypeCompound> attributes) { 2370 this.attributes = attributes; 2371 } 2372 2373 /** 2374 * A supertype_index value of 65535 specifies that the annotation appears on the superclass 2375 * in an extends clause of a class declaration, see JVMS 4.7.20.1 2376 */ 2377 public static final int SUPERCLASS_INDEX = 65535; 2378 2379 @Override 2380 public Void visitClassSymbol(Symbol.ClassSymbol s, Void unused) { 2381 ClassType t = (ClassType) s.type; 2382 int i = 0; 2383 ListBuffer<Type> interfaces = new ListBuffer<>(); 2384 for (Type itf : t.interfaces_field) { 2385 interfaces.add(addTypeAnnotations(itf, classExtends(i++))); 2386 } 2387 t.interfaces_field = interfaces.toList(); 2388 t.supertype_field = addTypeAnnotations(t.supertype_field, classExtends(SUPERCLASS_INDEX)); 2389 if (t.typarams_field != null) { 2390 t.typarams_field = 2391 rewriteTypeParameters( 2392 t.typarams_field, TargetType.CLASS_TYPE_PARAMETER_BOUND); 2393 } 2394 return null; 2395 } 2396 2397 @Override 2398 public Void visitMethodSymbol(Symbol.MethodSymbol s, Void unused) { 2399 Type t = s.type; 2400 if (t.hasTag(TypeTag.FORALL)) { 2401 Type.ForAll fa = (Type.ForAll) t; 2402 fa.tvars = rewriteTypeParameters(fa.tvars, TargetType.METHOD_TYPE_PARAMETER_BOUND); 2403 t = fa.qtype; 2404 } 2405 MethodType mt = (MethodType) t; 2406 ListBuffer<Type> argtypes = new ListBuffer<>(); 2407 int i = 0; 2408 for (Symbol.VarSymbol param : s.params) { 2409 param.type = addTypeAnnotations(param.type, methodFormalParameter(i++)); 2410 argtypes.add(param.type); 2411 } 2412 mt.argtypes = argtypes.toList(); 2413 ListBuffer<Type> thrown = new ListBuffer<>(); 2414 i = 0; 2415 for (Type thrownType : mt.thrown) { 2416 thrown.add(addTypeAnnotations(thrownType, thrownType(i++))); 2417 } 2418 mt.thrown = thrown.toList(); 2419 /* possible information loss if the type of the method is void then we can't add type 2420 * annotations to it 2421 */ 2422 if (!mt.restype.hasTag(TypeTag.VOID)) { 2423 mt.restype = addTypeAnnotations(mt.restype, TargetType.METHOD_RETURN); 2424 } 2425 2426 Type recvtype = mt.recvtype != null ? mt.recvtype : s.implicitReceiverType(); 2427 if (recvtype != null) { 2428 Type annotated = addTypeAnnotations(recvtype, TargetType.METHOD_RECEIVER); 2429 if (annotated != recvtype) { 2430 mt.recvtype = annotated; 2431 } 2432 } 2433 return null; 2434 } 2435 2436 @Override 2437 public Void visitVarSymbol(Symbol.VarSymbol s, Void unused) { 2438 s.type = addTypeAnnotations(s.type, TargetType.FIELD); 2439 return null; 2440 } 2441 2442 @Override 2443 public Void visitSymbol(Symbol s, Void unused) { 2444 return null; 2445 } 2446 2447 private List<Type> rewriteTypeParameters(List<Type> tvars, TargetType boundType) { 2448 ListBuffer<Type> tvarbuf = new ListBuffer<>(); 2449 int typeVariableIndex = 0; 2450 for (Type tvar : tvars) { 2451 Type bound = tvar.getUpperBound(); 2452 if (bound.isCompound()) { 2453 ClassType ct = (ClassType) bound; 2454 int boundIndex = 0; 2455 if (ct.supertype_field != null) { 2456 ct.supertype_field = 2457 addTypeAnnotations( 2458 ct.supertype_field, 2459 typeParameterBound( 2460 boundType, typeVariableIndex, boundIndex++)); 2461 } 2462 ListBuffer<Type> itfbuf = new ListBuffer<>(); 2463 for (Type itf : ct.interfaces_field) { 2464 itfbuf.add( 2465 addTypeAnnotations( 2466 itf, 2467 typeParameterBound( 2468 boundType, typeVariableIndex, boundIndex++))); 2469 } 2470 ct.interfaces_field = itfbuf.toList(); 2471 } else { 2472 bound = 2473 addTypeAnnotations( 2474 bound, 2475 typeParameterBound( 2476 boundType, 2477 typeVariableIndex, 2478 bound.isInterface() ? 1 : 0)); 2479 } 2480 ((TypeVar) tvar).setUpperBound(bound); 2481 tvarbuf.add(tvar); 2482 typeVariableIndex++; 2483 } 2484 return tvarbuf.toList(); 2485 } 2486 2487 private Type addTypeAnnotations(Type type, TargetType targetType) { 2488 return addTypeAnnotations(type, pos -> pos.type == targetType); 2489 } 2490 2491 private Type addTypeAnnotations(Type type, Predicate<TypeAnnotationPosition> filter) { 2492 Assert.checkNonNull(type); 2493 2494 // Find type annotations that match the given target type 2495 ListBuffer<Attribute.TypeCompound> filtered = new ListBuffer<>(); 2496 for (Attribute.TypeCompound attribute : this.attributes) { 2497 if (filter.test(attribute.position)) { 2498 filtered.add(attribute); 2499 } 2500 } 2501 if (filtered.isEmpty()) { 2502 return type; 2503 } 2504 2505 // Group the matching annotations by their type path. Each group of annotations will be 2506 // added to a type at that location. 2507 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>> 2508 attributesByPath = new HashMap<>(); 2509 for (Attribute.TypeCompound attribute : filtered.toList()) { 2510 attributesByPath 2511 .computeIfAbsent(attribute.position.location, k -> new ListBuffer<>()) 2512 .add(attribute); 2513 } 2514 2515 // Rewrite the type and add the annotations 2516 type = new TypeAnnotationStructuralTypeMapping(attributesByPath).visit(type, List.nil()); 2517 2518 return type; 2519 } 2520 2521 private static Predicate<TypeAnnotationPosition> typeParameterBound( 2522 TargetType targetType, int parameterIndex, int boundIndex) { 2523 return pos -> 2524 pos.type == targetType 2525 && pos.parameter_index == parameterIndex 2526 && pos.bound_index == boundIndex; 2527 } 2528 2529 private static Predicate<TypeAnnotationPosition> methodFormalParameter(int index) { 2530 return pos -> 2531 pos.type == TargetType.METHOD_FORMAL_PARAMETER && pos.parameter_index == index; 2532 } 2533 2534 private static Predicate<TypeAnnotationPosition> thrownType(int index) { 2535 return pos -> pos.type == TargetType.THROWS && pos.type_index == index; 2536 } 2537 2538 private static Predicate<TypeAnnotationPosition> classExtends(int index) { 2539 return pos -> pos.type == TargetType.CLASS_EXTENDS && pos.type_index == index; 2540 } 2541 } 2542 2543 /** 2544 * A type mapping that rewrites the type to include type annotations. 2545 * 2546 * <p>This logic is similar to {@link Type.StructuralTypeMapping}, but also tracks the path to 2547 * the contained types being rewritten, and so cannot easily share the existing logic. 2548 */ 2549 private static final class TypeAnnotationStructuralTypeMapping 2550 extends Types.TypeMapping<List<TypeAnnotationPosition.TypePathEntry>> { 2551 2552 private final Map<List<TypeAnnotationPosition.TypePathEntry>, 2553 ListBuffer<Attribute.TypeCompound>> attributesByPath; 2554 2555 private TypeAnnotationStructuralTypeMapping( 2556 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>> 2557 attributesByPath) { 2558 this.attributesByPath = attributesByPath; 2559 } 2560 2561 2562 @Override 2563 public Type visitClassType(ClassType t, List<TypeAnnotationPosition.TypePathEntry> path) { 2564 // As described in JVMS 4.7.20.2, type annotations on nested types are located with 2565 // 'left-to-right' steps starting on 'the outermost part of the type for which a type 2566 // annotation is admissible'. So the current path represents the outermost containing 2567 // type of the type being visited, and we add type path steps for every contained nested 2568 // type. 2569 Type outer = t.getEnclosingType(); 2570 Type outer1 = outer != Type.noType ? visit(outer, path) : outer; 2571 for (Type curr = t.getEnclosingType(); 2572 curr != Type.noType; 2573 curr = curr.getEnclosingType()) { 2574 path = path.append(TypeAnnotationPosition.TypePathEntry.INNER_TYPE); 2575 } 2576 List<Type> typarams = t.getTypeArguments(); 2577 List<Type> typarams1 = rewriteTypeParams(path, typarams); 2578 if (outer1 != outer || typarams != typarams1) { 2579 t = new ClassType(outer1, typarams1, t.tsym, t.getMetadata()); 2580 } 2581 return reannotate(t, path); 2582 } 2583 2584 private List<Type> rewriteTypeParams( 2585 List<TypeAnnotationPosition.TypePathEntry> path, List<Type> typarams) { 2586 var i = IntStream.iterate(0, x -> x + 1).iterator(); 2587 return typarams.map(typaram -> visit(typaram, 2588 path.append(new TypeAnnotationPosition.TypePathEntry( 2589 TypeAnnotationPosition.TypePathEntryKind.TYPE_ARGUMENT, i.nextInt())))); 2590 } 2591 2592 @Override 2593 public Type visitWildcardType( 2594 WildcardType wt, List<TypeAnnotationPosition.TypePathEntry> path) { 2595 Type t = wt.type; 2596 if (t != null) { 2597 t = visit(t, path.append(TypeAnnotationPosition.TypePathEntry.WILDCARD)); 2598 } 2599 if (t != wt.type) { 2600 wt = new WildcardType(t, wt.kind, wt.tsym, wt.bound, wt.getMetadata()); 2601 } 2602 return reannotate(wt, path); 2603 } 2604 2605 @Override 2606 public Type visitArrayType(ArrayType t, List<TypeAnnotationPosition.TypePathEntry> path) { 2607 Type elemtype = t.elemtype; 2608 Type elemtype1 = 2609 visit(elemtype, path.append(TypeAnnotationPosition.TypePathEntry.ARRAY)); 2610 if (elemtype1 != elemtype) { 2611 t = new ArrayType(elemtype1, t.tsym, t.getMetadata()); 2612 } 2613 return reannotate(t, path); 2614 } 2615 2616 @Override 2617 public Type visitType(Type t, List<TypeAnnotationPosition.TypePathEntry> path) { 2618 return reannotate(t, path); 2619 } 2620 2621 Type reannotate(Type type, List<TypeAnnotationPosition.TypePathEntry> path) { 2622 List<Attribute.TypeCompound> attributes = attributesForPath(path); 2623 if (attributes.isEmpty()) { 2624 return type; 2625 } 2626 // Runtime-visible and -invisible annotations are completed separately, so if the same 2627 // type has annotations from both it will get annotated twice. 2628 TypeMetadata.Annotations existing = type.getMetadata(TypeMetadata.Annotations.class); 2629 if (existing != null) { 2630 existing.annotationBuffer().addAll(attributes); 2631 return type; 2632 } 2633 return type.annotatedType(attributes); 2634 } 2635 2636 List<Attribute.TypeCompound> attributesForPath( 2637 List<TypeAnnotationPosition.TypePathEntry> path) { 2638 ListBuffer<Attribute.TypeCompound> attributes = attributesByPath.remove(path); 2639 return attributes != null ? attributes.toList() : List.nil(); 2640 } 2641 } 2642 2643 /* ********************************************************************** 2644 * Reading Symbols 2645 ***********************************************************************/ 2646 2647 /** Read a field. 2648 */ 2649 VarSymbol readField() { 2650 char rawFlags = nextChar(); 2651 long flags = adjustFieldFlags(rawFlags); 2652 Name name = poolReader.getName(nextChar()); 2653 Type type = poolReader.getType(nextChar()); 2654 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2655 readMemberAttrs(v); 2656 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 || 2657 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1) 2658 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v); 2659 return v; 2660 } 2661 2662 /** Read a method. 2663 */ 2664 MethodSymbol readMethod() { 2665 char rawFlags = nextChar(); 2666 long flags = adjustMethodFlags(rawFlags); 2667 Name name = poolReader.getName(nextChar()); 2668 Type descriptorType = poolReader.getType(nextChar()); 2669 Type type = descriptorType; 2670 if (currentOwner.isInterface() && 2671 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2672 if (majorVersion > Version.V52.major || 2673 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 2674 if ((flags & (STATIC | PRIVATE)) == 0) { 2675 currentOwner.flags_field |= DEFAULT; 2676 flags |= DEFAULT | ABSTRACT; 2677 } 2678 } else { 2679 //protect against ill-formed classfiles 2680 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2681 Integer.toString(majorVersion), 2682 Integer.toString(minorVersion)); 2683 } 2684 } 2685 validateMethodType(name, type); 2686 boolean forceLocal = false; 2687 if (name == names.init && currentOwner.hasOuterInstance()) { 2688 // Sometimes anonymous classes don't have an outer 2689 // instance, however, there is no reliable way to tell so 2690 // we never strip this$n 2691 // ditto for local classes. Local classes that have an enclosing method set 2692 // won't pass the "hasOuterInstance" check above, but those that don't have an 2693 // enclosing method (i.e. from initializers) will pass that check. 2694 boolean local = forceLocal = 2695 !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE); 2696 if (!currentOwner.name.isEmpty() && !local) 2697 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2698 type.getReturnType(), 2699 type.getThrownTypes(), 2700 syms.methodClass); 2701 } 2702 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2703 if (types.isSignaturePolymorphic(m)) { 2704 m.flags_field |= SIGNATURE_POLYMORPHIC; 2705 } 2706 if (saveParameterNames) 2707 initParameterNames(m); 2708 Symbol prevOwner = currentOwner; 2709 currentOwner = m; 2710 try { 2711 readMemberAttrs(m); 2712 } finally { 2713 currentOwner = prevOwner; 2714 } 2715 validateMethodType(name, m.type); 2716 adjustParameterAnnotations(m, descriptorType, forceLocal); 2717 setParameters(m, type); 2718 2719 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1) 2720 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m); 2721 if ((flags & VARARGS) != 0) { 2722 final Type last = type.getParameterTypes().last(); 2723 if (last == null || !last.hasTag(ARRAY)) { 2724 m.flags_field &= ~VARARGS; 2725 throw badClassFile("malformed.vararg.method", m); 2726 } 2727 } 2728 2729 return m; 2730 } 2731 2732 void validateMethodType(Name name, Type t) { 2733 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) || 2734 (name == names.init && !t.getReturnType().hasTag(TypeTag.VOID))) { 2735 throw badClassFile("method.descriptor.invalid", name); 2736 } 2737 } 2738 2739 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2740 if (args.isEmpty()) { 2741 return args; 2742 } 2743 boolean isVarargs = (flags & VARARGS) != 0; 2744 if (isVarargs) { 2745 Type varargsElem = args.last(); 2746 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2747 for (Type t : args) { 2748 adjustedArgs.append(t != varargsElem ? 2749 t : 2750 ((ArrayType)t).makeVarargs()); 2751 } 2752 args = adjustedArgs.toList(); 2753 } 2754 return args.tail; 2755 } 2756 2757 /** 2758 * Init the parameter names array. 2759 * Parameter names are currently inferred from the names in the 2760 * LocalVariableTable attributes of a Code attribute. 2761 * (Note: this means parameter names are currently not available for 2762 * methods without a Code attribute.) 2763 * This method initializes an array in which to store the name indexes 2764 * of parameter names found in LocalVariableTable attributes. It is 2765 * slightly supersized to allow for additional slots with a start_pc of 0. 2766 */ 2767 void initParameterNames(MethodSymbol sym) { 2768 // make allowance for synthetic parameters. 2769 final int excessSlots = 4; 2770 int expectedParameterSlots = 2771 Code.width(sym.type.getParameterTypes()) + excessSlots; 2772 if (parameterNameIndicesLvt == null 2773 || parameterNameIndicesLvt.length < expectedParameterSlots) { 2774 parameterNameIndicesLvt = new int[expectedParameterSlots]; 2775 } else 2776 Arrays.fill(parameterNameIndicesLvt, 0); 2777 } 2778 2779 /** 2780 * Set the parameters for a method symbol, including any names and 2781 * annotations that were read. 2782 * 2783 * <p>The type of the symbol may have changed while reading the 2784 * method attributes (see the Signature attribute). This may be 2785 * because of generic information or because anonymous synthetic 2786 * parameters were added. The original type (as read from the 2787 * method descriptor) is used to help guess the existence of 2788 * anonymous synthetic parameters. 2789 */ 2790 void setParameters(MethodSymbol sym, Type jvmType) { 2791 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2792 // the code in readMethod may have skipped the first 2793 // parameter when setting up the MethodType. If so, we 2794 // make a corresponding allowance here for the position of 2795 // the first parameter. Note that this assumes the 2796 // skipped parameter has a width of 1 -- i.e. it is not 2797 // a double width type (long or double.) 2798 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2799 // Sometimes anonymous classes don't have an outer 2800 // instance, however, there is no reliable way to tell so 2801 // we never strip this$n 2802 if (!currentOwner.name.isEmpty()) 2803 firstParamLvt += 1; 2804 } 2805 2806 if (sym.type != jvmType) { 2807 // reading the method attributes has caused the 2808 // symbol's type to be changed. (i.e. the Signature 2809 // attribute.) This may happen if there are hidden 2810 // (synthetic) parameters in the descriptor, but not 2811 // in the Signature. The position of these hidden 2812 // parameters is unspecified; for now, assume they are 2813 // at the beginning, and so skip over them. The 2814 // primary case for this is two hidden parameters 2815 // passed into Enum constructors. 2816 int skip = Code.width(jvmType.getParameterTypes()) 2817 - Code.width(sym.type.getParameterTypes()); 2818 firstParamLvt += skip; 2819 } 2820 Set<Name> paramNames = new HashSet<>(); 2821 ListBuffer<VarSymbol> params = new ListBuffer<>(); 2822 // we maintain two index pointers, one for the LocalVariableTable attribute 2823 // and the other for the MethodParameters attribute. 2824 // This is needed as the MethodParameters attribute may contain 2825 // name_index = 0 in which case we want to fall back to the LocalVariableTable. 2826 // In such case, we still want to read the flags from the MethodParameters with that index. 2827 int nameIndexLvt = firstParamLvt; 2828 int nameIndexMp = 0; 2829 int annotationIndex = 0; 2830 for (Type t: sym.type.getParameterTypes()) { 2831 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames); 2832 params.append(param); 2833 if (parameterAnnotations != null) { 2834 ParameterAnnotations annotations = parameterAnnotations[annotationIndex]; 2835 if (annotations != null && annotations.proxies != null) { 2836 attachAnnotations(param, annotations.proxies); 2837 } 2838 } 2839 nameIndexLvt += Code.width(t); 2840 nameIndexMp++; 2841 annotationIndex++; 2842 } 2843 Assert.check(parameterAnnotations == null || 2844 parameterAnnotations.length == annotationIndex); 2845 Assert.checkNull(sym.params); 2846 sym.params = params.toList(); 2847 parameterAnnotations = null; 2848 parameterNameIndicesLvt = null; 2849 parameterNameIndicesMp = null; 2850 allParameterAccessFlags = null; 2851 parameterAccessFlags = null; 2852 } 2853 2854 void adjustParameterAnnotations(MethodSymbol sym, Type methodDescriptor, 2855 boolean forceLocal) { 2856 if (parameterAnnotations == null) { 2857 return ; 2858 } 2859 2860 //the specification for Runtime(In)VisibleParameterAnnotations does not 2861 //enforce any mapping between the method parameters and the recorded 2862 //parameter annotation. Attempt a number of heuristics to adjust the 2863 //adjust parameterAnnotations to the percieved number of parameters: 2864 2865 int methodParameterCount = sym.type.getParameterTypes().size(); 2866 2867 if (methodParameterCount == parameterAnnotations.length) { 2868 //we've got exactly as many parameter annotations as are parameters 2869 //of the method (after considering a possible Signature attribute), 2870 //no need to do anything. the parameter creation code will use 2871 //the 1-1 mapping to restore the annotations: 2872 return ; 2873 } 2874 2875 if (allParameterAccessFlags != null) { 2876 //MethodParameters attribute present, use it: 2877 2878 //count the number of non-synthetic and non-mandatory parameters: 2879 int realParameters = 0; 2880 2881 for (int i = 0; i < allParameterAccessFlags.length; i++) { 2882 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) { 2883 realParameters++; 2884 } 2885 } 2886 2887 int methodDescriptorParameterCount = methodDescriptor.getParameterTypes().size(); 2888 2889 if (realParameters == parameterAnnotations.length && 2890 allParameterAccessFlags.length == methodDescriptorParameterCount) { 2891 //if we have parameter annotations for each non-synthetic/mandatory parameter, 2892 //and if Signature was not present, expand the parameterAnnotations to cover 2893 //all the method descriptor's parameters: 2894 if (sym.type == methodDescriptor) { 2895 ParameterAnnotations[] newParameterAnnotations = 2896 new ParameterAnnotations[methodParameterCount]; 2897 int srcIndex = 0; 2898 2899 for (int i = 0; i < methodParameterCount; i++) { 2900 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) { 2901 newParameterAnnotations[i] = parameterAnnotations[srcIndex++]; 2902 } 2903 } 2904 2905 parameterAnnotations = newParameterAnnotations; 2906 } else { 2907 dropParameterAnnotations(); 2908 } 2909 } else if (realParameters == methodParameterCount && 2910 methodDescriptorParameterCount == parameterAnnotations.length && 2911 allParameterAccessFlags.length == methodDescriptorParameterCount) { 2912 //if there are as many parameter annotations as parameters in 2913 //the method descriptor, and as many real parameters as parameters 2914 //in the method's type (after accounting for Signature), shrink 2915 //the parameterAnnotations to only cover the parameters from 2916 //the method's type: 2917 ParameterAnnotations[] newParameterAnnotations = 2918 new ParameterAnnotations[methodParameterCount]; 2919 int targetIndex = 0; 2920 2921 for (int i = 0; i < parameterAnnotations.length; i++) { 2922 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) { 2923 newParameterAnnotations[targetIndex++] = parameterAnnotations[i]; 2924 } 2925 } 2926 2927 parameterAnnotations = newParameterAnnotations; 2928 } else { 2929 dropParameterAnnotations(); 2930 } 2931 return ; 2932 } 2933 2934 if (!sym.isConstructor()) { 2935 //if the number of parameter annotations and the number of parameters 2936 //don't match, we don't have any heuristics to map one to the other 2937 //unless the method is a constructor: 2938 dropParameterAnnotations(); 2939 return ; 2940 } 2941 2942 if (sym.owner.isEnum()) { 2943 if (methodParameterCount == parameterAnnotations.length + 2 && 2944 sym.type == methodDescriptor) { 2945 //handle constructors of enum types without the Signature attribute - 2946 //there are the two synthetic parameters (name and ordinal) in the 2947 //constructor, but there may be only parameter annotations for the 2948 //real non-synthetic parameters: 2949 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[parameterAnnotations.length + 2]; 2950 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 2, parameterAnnotations.length); 2951 parameterAnnotations = newParameterAnnotations; 2952 return ; 2953 } 2954 } else if (sym.owner.isDirectlyOrIndirectlyLocal() || forceLocal) { 2955 //local class may capture the enclosing instance (as the first parameter), 2956 //and local variables (as trailing parameters) 2957 //if there are less parameter annotations than parameters, put the existing 2958 //ones starting with offset: 2959 if (methodParameterCount > parameterAnnotations.length && 2960 sym.type == methodDescriptor) { 2961 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[methodParameterCount]; 2962 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 1, parameterAnnotations.length); 2963 parameterAnnotations = newParameterAnnotations; 2964 return ; 2965 } 2966 } 2967 2968 //no heuristics worked, drop the annotations: 2969 dropParameterAnnotations(); 2970 } 2971 2972 private void dropParameterAnnotations() { 2973 parameterAnnotations = null; 2974 log.warning(LintWarnings.RuntimeInvisibleParameterAnnotations(currentClassFile)); 2975 } 2976 /** 2977 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method. 2978 * Flags are optionally read from the MethodParameters attribute. 2979 * Names are optionally read from the MethodParameters attribute. If the constant pool index 2980 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute. 2981 * @param mpIndex the index of the parameter in the MethodParameters attribute 2982 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute 2983 */ 2984 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) { 2985 long flags = PARAMETER; 2986 Name argName; 2987 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length 2988 && parameterAccessFlags[mpIndex] != 0) { 2989 flags |= parameterAccessFlags[mpIndex]; 2990 } 2991 if (parameterNameIndicesMp != null && mpIndex < parameterNameIndicesMp.length 2992 // if name_index is 0, then we might still get a name from the LocalVariableTable 2993 && parameterNameIndicesMp[mpIndex] != 0) { 2994 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty); 2995 flags |= NAME_FILLED; 2996 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length 2997 && parameterNameIndicesLvt[lvtIndex] != 0) { 2998 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty); 2999 flags |= NAME_FILLED; 3000 } else { 3001 String prefix = "arg"; 3002 while (true) { 3003 argName = names.fromString(prefix + exclude.size()); 3004 if (!exclude.contains(argName)) 3005 break; 3006 prefix += "$"; 3007 } 3008 } 3009 exclude.add(argName); 3010 return new ParamSymbol(flags, argName, t, owner); 3011 } 3012 3013 /** 3014 * skip n bytes 3015 */ 3016 void skipBytes(int n) { 3017 bp = bp + n; 3018 } 3019 3020 /** Skip a field or method 3021 */ 3022 void skipMember() { 3023 bp = bp + 6; 3024 char ac = nextChar(); 3025 for (int i = 0; i < ac; i++) { 3026 bp = bp + 2; 3027 int attrLen = nextInt(); 3028 bp = bp + attrLen; 3029 } 3030 } 3031 3032 void skipInnerClasses() { 3033 int n = nextChar(); 3034 for (int i = 0; i < n; i++) { 3035 nextChar(); 3036 nextChar(); 3037 nextChar(); 3038 nextChar(); 3039 } 3040 } 3041 3042 /** Enter type variables of this classtype and all enclosing ones in 3043 * `typevars'. 3044 */ 3045 protected void enterTypevars(Symbol sym, Type t) { 3046 if (t.getEnclosingType() != null) { 3047 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) { 3048 enterTypevars(sym.owner, t.getEnclosingType()); 3049 } 3050 } else if (sym.kind == MTH && !sym.isStatic()) { 3051 enterTypevars(sym.owner, sym.owner.type); 3052 } 3053 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) { 3054 typevars.enter(xs.head.tsym); 3055 } 3056 } 3057 3058 protected ClassSymbol enterClass(Name name) { 3059 return syms.enterClass(currentModule, name); 3060 } 3061 3062 protected ClassSymbol enterClass(Name name, TypeSymbol owner) { 3063 return syms.enterClass(currentModule, name, owner); 3064 } 3065 3066 /** Read contents of a given class symbol `c'. Both external and internal 3067 * versions of an inner class are read. 3068 */ 3069 void readClass(ClassSymbol c) { 3070 ClassType ct = (ClassType)c.type; 3071 3072 // allocate scope for members 3073 c.members_field = WriteableScope.create(c); 3074 3075 // prepare type variable table 3076 typevars = typevars.dup(currentOwner); 3077 if (ct.getEnclosingType().hasTag(CLASS)) 3078 enterTypevars(c.owner, ct.getEnclosingType()); 3079 3080 // read flags, or skip if this is an inner class 3081 long f = nextChar(); 3082 long flags = adjustClassFlags(c, f); 3083 if ((flags & MODULE) == 0) { 3084 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags; 3085 // read own class name and check that it matches 3086 currentModule = c.packge().modle; 3087 ClassSymbol self = poolReader.getClass(nextChar()); 3088 if (c != self) { 3089 throw badClassFile("class.file.wrong.class", 3090 self.flatname); 3091 } 3092 } else { 3093 if (majorVersion < Version.V53.major) { 3094 throw badClassFile("anachronistic.module.info", 3095 Integer.toString(majorVersion), 3096 Integer.toString(minorVersion)); 3097 } 3098 c.flags_field = flags; 3099 if (c.owner.kind != MDL) { 3100 throw badClassFile("module.info.definition.expected"); 3101 } 3102 currentModule = (ModuleSymbol) c.owner; 3103 int this_class = nextChar(); 3104 // temp, no check on this_class 3105 } 3106 3107 // class attributes must be read before class 3108 // skip ahead to read class attributes 3109 int startbp = bp; 3110 nextChar(); 3111 char interfaceCount = nextChar(); 3112 bp += interfaceCount * 2; 3113 char fieldCount = nextChar(); 3114 for (int i = 0; i < fieldCount; i++) skipMember(); 3115 char methodCount = nextChar(); 3116 for (int i = 0; i < methodCount; i++) skipMember(); 3117 readClassAttrs(c); 3118 3119 if (!c.getPermittedSubclasses().isEmpty()) { 3120 c.flags_field |= SEALED; 3121 } 3122 3123 // reset and read rest of classinfo 3124 bp = startbp; 3125 int n = nextChar(); 3126 if ((flags & MODULE) != 0 && n > 0) { 3127 throw badClassFile("module.info.invalid.super.class"); 3128 } 3129 if (ct.supertype_field == null) 3130 ct.supertype_field = 3131 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType); 3132 n = nextChar(); 3133 List<Type> is = List.nil(); 3134 for (int i = 0; i < n; i++) { 3135 Type _inter = poolReader.getClass(nextChar()).erasure(types); 3136 is = is.prepend(_inter); 3137 } 3138 if (ct.interfaces_field == null) 3139 ct.interfaces_field = is.reverse(); 3140 3141 Assert.check(fieldCount == nextChar()); 3142 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 3143 Assert.check(methodCount == nextChar()); 3144 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 3145 if (c.isRecord()) { 3146 for (RecordComponent rc: c.getRecordComponents()) { 3147 rc.accessor = lookupMethod(c, rc.name, List.nil()); 3148 } 3149 } 3150 typevars = typevars.leave(); 3151 } 3152 3153 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) { 3154 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) { 3155 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) { 3156 return (MethodSymbol) s; 3157 } 3158 } 3159 return null; 3160 } 3161 3162 /** Read inner class info. For each inner/outer pair allocate a 3163 * member class. 3164 */ 3165 void readInnerClasses(ClassSymbol c) { 3166 int n = nextChar(); 3167 for (int i = 0; i < n; i++) { 3168 nextChar(); // skip inner class symbol 3169 int outerIdx = nextChar(); 3170 int nameIdx = nextChar(); 3171 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null); 3172 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty); 3173 if (name == null) name = names.empty; 3174 long flags = adjustClassFlags(c, nextChar()); 3175 if (outer != null) { // we have a member class 3176 if (name == names.empty) 3177 name = names.one; 3178 ClassSymbol member = enterClass(name, outer); 3179 if ((flags & STATIC) == 0) { 3180 ((ClassType)member.type).setEnclosingType(outer.type); 3181 if (member.erasure_field != null) 3182 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 3183 } 3184 if (c == outer && member.owner == c) { 3185 member.flags_field = flags; 3186 enterMember(c, member); 3187 } 3188 } 3189 } 3190 } 3191 3192 /** Read a class definition from the bytes in buf. 3193 */ 3194 private void readClassBuffer(ClassSymbol c) throws IOException { 3195 int magic = nextInt(); 3196 if (magic != JAVA_MAGIC) 3197 throw badClassFile("illegal.start.of.class.file"); 3198 3199 minorVersion = nextChar(); 3200 majorVersion = nextChar(); 3201 int maxMajor = Version.MAX().major; 3202 int maxMinor = Version.MAX().minor; 3203 previewClassFile = 3204 minorVersion == ClassFile.PREVIEW_MINOR_VERSION; 3205 if (majorVersion > maxMajor || 3206 majorVersion * 1000 + minorVersion < 3207 Version.MIN().major * 1000 + Version.MIN().minor) { 3208 if (majorVersion == (maxMajor + 1) && !previewClassFile) 3209 log.warning(Warnings.BigMajorVersion(currentClassFile, 3210 majorVersion, 3211 maxMajor)); 3212 else 3213 throw badClassFile("wrong.version", 3214 Integer.toString(majorVersion), 3215 Integer.toString(minorVersion), 3216 Integer.toString(maxMajor), 3217 Integer.toString(maxMinor)); 3218 } 3219 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT; 3220 3221 if (previewClassFile) { 3222 if (!preview.isEnabled()) { 3223 log.error(preview.disabledError(currentClassFile, majorVersion)); 3224 } else { 3225 preview.warnPreview(c.classfile, majorVersion); 3226 } 3227 } 3228 3229 poolReader = new PoolReader(this, names, syms); 3230 bp = poolReader.readPool(buf, bp); 3231 if (signatureBuffer.length < bp) { 3232 int ns = Integer.highestOneBit(bp) << 1; 3233 signatureBuffer = new byte[ns]; 3234 } 3235 readClass(c); 3236 } 3237 3238 public void readClassFile(ClassSymbol c) { 3239 currentOwner = c; 3240 currentClassFile = c.classfile; 3241 warnedAttrs.clear(); 3242 filling = true; 3243 target = null; 3244 repeatable = null; 3245 try { 3246 bp = 0; 3247 buf.reset(); 3248 try (InputStream input = c.classfile.openInputStream()) { 3249 buf.appendStream(input); 3250 } 3251 readClassBuffer(c); 3252 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 3253 List<Type> missing = missingTypeVariables; 3254 List<Type> found = foundTypeVariables; 3255 missingTypeVariables = List.nil(); 3256 foundTypeVariables = List.nil(); 3257 interimUses = List.nil(); 3258 interimProvides = List.nil(); 3259 filling = false; 3260 ClassType ct = (ClassType)currentOwner.type; 3261 ct.supertype_field = 3262 types.subst(ct.supertype_field, missing, found); 3263 ct.interfaces_field = 3264 types.subst(ct.interfaces_field, missing, found); 3265 ct.typarams_field = 3266 types.substBounds(ct.typarams_field, missing, found); 3267 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) { 3268 types.head.tsym.type = types.head; 3269 } 3270 } else if (missingTypeVariables.isEmpty() != 3271 foundTypeVariables.isEmpty()) { 3272 Name name = missingTypeVariables.head.tsym.name; 3273 throw badClassFile("undecl.type.var", name); 3274 } 3275 3276 if ((c.flags_field & Flags.ANNOTATION) != 0) { 3277 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable))); 3278 } else { 3279 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType()); 3280 } 3281 3282 if (c == currentModule.module_info) { 3283 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) { 3284 Assert.check(currentModule.isCompleted()); 3285 currentModule.usesProvidesCompleter = 3286 new UsesProvidesCompleter(currentModule, interimUses, interimProvides); 3287 } else { 3288 currentModule.uses = List.nil(); 3289 currentModule.provides = List.nil(); 3290 } 3291 } 3292 } catch (IOException | ClosedFileSystemException ex) { 3293 throw badClassFile("unable.to.access.file", ex.toString()); 3294 } catch (ArrayIndexOutOfBoundsException ex) { 3295 throw badClassFile("bad.class.file", c.flatname); 3296 } finally { 3297 interimUses = List.nil(); 3298 interimProvides = List.nil(); 3299 missingTypeVariables = List.nil(); 3300 foundTypeVariables = List.nil(); 3301 filling = false; 3302 } 3303 } 3304 3305 /** We can only read a single class file at a time; this 3306 * flag keeps track of when we are currently reading a class 3307 * file. 3308 */ 3309 public boolean filling = false; 3310 3311 /* ********************************************************************** 3312 * Adjusting flags 3313 ***********************************************************************/ 3314 3315 long adjustFieldFlags(long flags) { 3316 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION; 3317 if (allowValueClasses && previewClassFile && (flags & ACC_STRICT) != 0) { 3318 flags &= ~ACC_STRICT; 3319 flags |= STRICT; 3320 } 3321 return flags; 3322 } 3323 3324 long adjustMethodFlags(long flags) { 3325 if ((flags & ACC_BRIDGE) != 0) { 3326 flags &= ~ACC_BRIDGE; 3327 flags |= BRIDGE; 3328 } 3329 if ((flags & ACC_VARARGS) != 0) { 3330 flags &= ~ACC_VARARGS; 3331 flags |= VARARGS; 3332 } 3333 return flags; 3334 } 3335 3336 long adjustClassFlags(ClassSymbol c, long flags) { 3337 if ((flags & ACC_MODULE) != 0) { 3338 flags &= ~ACC_MODULE; 3339 flags |= MODULE; 3340 } 3341 if (((flags & ACC_IDENTITY) != 0 && !isMigratedValueClass(flags)) 3342 || (majorVersion <= Version.MAX().major && minorVersion != PREVIEW_MINOR_VERSION && (flags & INTERFACE) == 0)) { 3343 flags |= IDENTITY_TYPE; 3344 } else if (needsValueFlag(c, flags)) { 3345 flags |= VALUE_CLASS; 3346 flags &= ~IDENTITY_TYPE; 3347 } 3348 flags &= ~ACC_IDENTITY; // ACC_IDENTITY and SYNCHRONIZED bits overloaded 3349 return flags; 3350 } 3351 3352 private boolean needsValueFlag(Symbol c, long flags) { 3353 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION; 3354 if (allowValueClasses) { 3355 if (previewClassFile && majorVersion >= V67.major && (flags & INTERFACE) == 0 || 3356 majorVersion >= V67.major && isMigratedValueClass(flags)) { 3357 return true; 3358 } 3359 } 3360 return false; 3361 } 3362 3363 private boolean isMigratedValueClass(long flags) { 3364 return allowValueClasses && ((flags & MIGRATED_VALUE_CLASS) != 0); 3365 } 3366 3367 /** 3368 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 3369 * The attribute is only the last component of the original filename, so is unlikely 3370 * to be valid as is, so operations other than those to access the name throw 3371 * UnsupportedOperationException 3372 */ 3373 private static class SourceFileObject implements JavaFileObject { 3374 3375 /** The file's name. 3376 */ 3377 private final Name name; 3378 3379 public SourceFileObject(Name name) { 3380 this.name = name; 3381 } 3382 3383 @Override @DefinedBy(Api.COMPILER) 3384 public URI toUri() { 3385 try { 3386 return new URI(null, name.toString(), null); 3387 } catch (URISyntaxException e) { 3388 throw new PathFileObject.CannotCreateUriError(name.toString(), e); 3389 } 3390 } 3391 3392 @Override @DefinedBy(Api.COMPILER) 3393 public String getName() { 3394 return name.toString(); 3395 } 3396 3397 @Override @DefinedBy(Api.COMPILER) 3398 public JavaFileObject.Kind getKind() { 3399 return BaseFileManager.getKind(getName()); 3400 } 3401 3402 @Override @DefinedBy(Api.COMPILER) 3403 public InputStream openInputStream() { 3404 throw new UnsupportedOperationException(); 3405 } 3406 3407 @Override @DefinedBy(Api.COMPILER) 3408 public OutputStream openOutputStream() { 3409 throw new UnsupportedOperationException(); 3410 } 3411 3412 @Override @DefinedBy(Api.COMPILER) 3413 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 3414 throw new UnsupportedOperationException(); 3415 } 3416 3417 @Override @DefinedBy(Api.COMPILER) 3418 public Reader openReader(boolean ignoreEncodingErrors) { 3419 throw new UnsupportedOperationException(); 3420 } 3421 3422 @Override @DefinedBy(Api.COMPILER) 3423 public Writer openWriter() { 3424 throw new UnsupportedOperationException(); 3425 } 3426 3427 @Override @DefinedBy(Api.COMPILER) 3428 public long getLastModified() { 3429 throw new UnsupportedOperationException(); 3430 } 3431 3432 @Override @DefinedBy(Api.COMPILER) 3433 public boolean delete() { 3434 throw new UnsupportedOperationException(); 3435 } 3436 3437 @Override @DefinedBy(Api.COMPILER) 3438 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 3439 return true; // fail-safe mode 3440 } 3441 3442 @Override @DefinedBy(Api.COMPILER) 3443 public NestingKind getNestingKind() { 3444 return null; 3445 } 3446 3447 @Override @DefinedBy(Api.COMPILER) 3448 public Modifier getAccessLevel() { 3449 return null; 3450 } 3451 3452 /** 3453 * Check if two file objects are equal. 3454 * SourceFileObjects are just placeholder objects for the value of a 3455 * SourceFile attribute, and do not directly represent specific files. 3456 * Two SourceFileObjects are equal if their names are equal. 3457 */ 3458 @Override 3459 public boolean equals(Object other) { 3460 if (this == other) 3461 return true; 3462 return (other instanceof SourceFileObject sourceFileObject) 3463 && name.equals(sourceFileObject.name); 3464 } 3465 3466 @Override 3467 public int hashCode() { 3468 return name.hashCode(); 3469 } 3470 } 3471 3472 private class CompleterDeproxy implements AnnotationTypeCompleter { 3473 ClassSymbol proxyOn; 3474 CompoundAnnotationProxy target; 3475 CompoundAnnotationProxy repeatable; 3476 3477 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target, 3478 CompoundAnnotationProxy repeatable) 3479 { 3480 this.proxyOn = c; 3481 this.target = target; 3482 this.repeatable = repeatable; 3483 } 3484 3485 @Override 3486 public void complete(ClassSymbol sym) { 3487 Assert.check(proxyOn == sym); 3488 Attribute.Compound theTarget = null, theRepeatable = null; 3489 AnnotationDeproxy deproxy; 3490 3491 try { 3492 if (target != null) { 3493 deproxy = new AnnotationDeproxy(proxyOn); 3494 theTarget = deproxy.deproxyCompound(target); 3495 } 3496 3497 if (repeatable != null) { 3498 deproxy = new AnnotationDeproxy(proxyOn); 3499 theRepeatable = deproxy.deproxyCompound(repeatable); 3500 } 3501 } catch (Exception e) { 3502 throw new CompletionFailure(sym, 3503 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())), 3504 dcfh); 3505 } 3506 3507 sym.getAnnotationTypeMetadata().setTarget(theTarget); 3508 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable); 3509 } 3510 } 3511 3512 private class ProxyType extends Type { 3513 3514 private final Name name; 3515 3516 public ProxyType(int index) { 3517 super(syms.noSymbol, List.nil()); 3518 this.name = poolReader.getName(index); 3519 } 3520 3521 @Override 3522 public TypeTag getTag() { 3523 return TypeTag.NONE; 3524 } 3525 3526 public Type resolve() { 3527 return name.map(ClassReader.this::sigToType); 3528 } 3529 3530 @Override @DefinedBy(Api.LANGUAGE_MODEL) 3531 public String toString() { 3532 return "<ProxyType>"; 3533 } 3534 3535 } 3536 3537 private static final class InterimUsesDirective { 3538 public final Name service; 3539 3540 public InterimUsesDirective(Name service) { 3541 this.service = service; 3542 } 3543 3544 } 3545 3546 private static final class InterimProvidesDirective { 3547 public final Name service; 3548 public final List<Name> impls; 3549 3550 public InterimProvidesDirective(Name service, List<Name> impls) { 3551 this.service = service; 3552 this.impls = impls; 3553 } 3554 3555 } 3556 3557 private final class UsesProvidesCompleter implements Completer { 3558 private final ModuleSymbol currentModule; 3559 private final List<InterimUsesDirective> interimUsesCopy; 3560 private final List<InterimProvidesDirective> interimProvidesCopy; 3561 3562 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) { 3563 this.currentModule = currentModule; 3564 this.interimUsesCopy = interimUsesCopy; 3565 this.interimProvidesCopy = interimProvidesCopy; 3566 } 3567 3568 @Override 3569 public void complete(Symbol sym) throws CompletionFailure { 3570 ListBuffer<Directive> directives = new ListBuffer<>(); 3571 directives.addAll(currentModule.directives); 3572 ListBuffer<UsesDirective> uses = new ListBuffer<>(); 3573 for (InterimUsesDirective interim : interimUsesCopy) { 3574 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service)); 3575 uses.add(d); 3576 directives.add(d); 3577 } 3578 currentModule.uses = uses.toList(); 3579 ListBuffer<ProvidesDirective> provides = new ListBuffer<>(); 3580 for (InterimProvidesDirective interim : interimProvidesCopy) { 3581 ListBuffer<ClassSymbol> impls = new ListBuffer<>(); 3582 for (Name impl : interim.impls) { 3583 impls.append(syms.enterClass(currentModule, impl)); 3584 } 3585 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service), 3586 impls.toList()); 3587 provides.add(d); 3588 directives.add(d); 3589 } 3590 currentModule.provides = provides.toList(); 3591 currentModule.directives = directives.toList(); 3592 } 3593 } 3594 }