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