1 /* 2 * Copyright (c) 1999, 2023, 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.Lint.LintCategory; 55 import com.sun.tools.javac.code.Scope.WriteableScope; 56 import com.sun.tools.javac.code.Symbol.*; 57 import com.sun.tools.javac.code.Symtab; 58 import com.sun.tools.javac.code.Type.*; 59 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata; 60 import com.sun.tools.javac.file.BaseFileManager; 61 import com.sun.tools.javac.file.PathFileObject; 62 import com.sun.tools.javac.jvm.ClassFile.Version; 63 import com.sun.tools.javac.jvm.PoolConstant.NameAndType; 64 import com.sun.tools.javac.main.Option; 65 import com.sun.tools.javac.resources.CompilerProperties; 66 import com.sun.tools.javac.resources.CompilerProperties.Errors; 67 import com.sun.tools.javac.resources.CompilerProperties.Fragments; 68 import com.sun.tools.javac.resources.CompilerProperties.Warnings; 69 import com.sun.tools.javac.tree.JCTree; 70 import com.sun.tools.javac.util.*; 71 import com.sun.tools.javac.util.ByteBuffer.UnderflowException; 72 import com.sun.tools.javac.util.DefinedBy.Api; 73 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 74 import com.sun.tools.javac.util.JCDiagnostic.Fragment; 75 76 import static com.sun.tools.javac.code.Flags.*; 77 import static com.sun.tools.javac.code.Kinds.Kind.*; 78 79 import com.sun.tools.javac.code.Scope.LookupKind; 80 81 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE; 82 import static com.sun.tools.javac.code.TypeTag.ARRAY; 83 import static com.sun.tools.javac.code.TypeTag.CLASS; 84 import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 85 import static com.sun.tools.javac.jvm.ClassFile.*; 86 import static com.sun.tools.javac.jvm.ClassFile.Version.*; 87 88 import static com.sun.tools.javac.main.Option.PARAMETERS; 89 90 /** This class provides operations to read a classfile into an internal 91 * representation. The internal representation is anchored in a 92 * ClassSymbol which contains in its scope symbol representations 93 * for all other definitions in the classfile. Top-level Classes themselves 94 * appear as members of the scopes of PackageSymbols. 95 * 96 * <p><b>This is NOT part of any supported API. 97 * If you write code that depends on this, you do so at your own risk. 98 * This code and its internal interfaces are subject to change or 99 * deletion without notice.</b> 100 */ 101 public class ClassReader { 102 /** The context key for the class reader. */ 103 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 104 105 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 106 107 private final Annotate annotate; 108 109 /** Switch: verbose output. 110 */ 111 boolean verbose; 112 113 /** Switch: allow modules. 114 */ 115 boolean allowModules; 116 117 /** Switch: allow value classes. 118 */ 119 boolean allowValueClasses; 120 121 /** Switch: allow sealed 122 */ 123 boolean allowSealedTypes; 124 125 /** Switch: allow records 126 */ 127 boolean allowRecords; 128 129 /** Lint option: warn about classfile issues 130 */ 131 boolean lintClassfile; 132 133 /** Switch: warn (instead of error) on illegal UTF-8 134 */ 135 boolean warnOnIllegalUtf8; 136 137 /** Switch: preserve parameter names from the variable table. 138 */ 139 public boolean saveParameterNames; 140 141 /** 142 * The currently selected profile. 143 */ 144 public final Profile profile; 145 146 /** The log to use for verbose output 147 */ 148 final Log log; 149 150 /** The symbol table. */ 151 Symtab syms; 152 153 Types types; 154 155 /** The name table. */ 156 final Names names; 157 158 /** Access to files 159 */ 160 private final JavaFileManager fileManager; 161 162 /** Factory for diagnostics 163 */ 164 JCDiagnostic.Factory diagFactory; 165 166 DeferredCompletionFailureHandler dcfh; 167 168 /** 169 * Support for preview language features. 170 */ 171 Preview preview; 172 173 /** The current scope where type variables are entered. 174 */ 175 protected WriteableScope typevars; 176 177 private List<InterimUsesDirective> interimUses = List.nil(); 178 private List<InterimProvidesDirective> interimProvides = List.nil(); 179 180 /** The path name of the class file currently being read. 181 */ 182 protected JavaFileObject currentClassFile = null; 183 184 /** The class or method currently being read. 185 */ 186 protected Symbol currentOwner = null; 187 188 /** The module containing the class currently being read. 189 */ 190 protected ModuleSymbol currentModule = null; 191 192 /** The buffer containing the currently read class file. 193 */ 194 ByteBuffer buf = new ByteBuffer(INITIAL_BUFFER_SIZE); 195 196 /** The current input pointer. 197 */ 198 protected int bp; 199 200 /** The pool reader. 201 */ 202 PoolReader poolReader; 203 204 /** The major version number of the class file being read. */ 205 int majorVersion; 206 /** The minor version number of the class file being read. */ 207 int minorVersion; 208 209 /** UTF-8 validation level */ 210 Convert.Validation utf8validation; 211 212 /** A table to hold the constant pool indices for method parameter 213 * names, as given in LocalVariableTable attributes. 214 */ 215 int[] parameterNameIndicesLvt; 216 217 /** 218 * A table to hold the constant pool indices for method parameter 219 * names, as given in the MethodParameters attribute. 220 */ 221 int[] parameterNameIndicesMp; 222 223 /** 224 * A table to hold the access flags of the method parameters. 225 */ 226 int[] parameterAccessFlags; 227 228 /** 229 * A table to hold the access flags of the method parameters, 230 * for all parameters including synthetic and mandated ones. 231 */ 232 int[] allParameterAccessFlags; 233 234 /** 235 * A table to hold annotations for method parameters. 236 */ 237 ParameterAnnotations[] parameterAnnotations; 238 239 /** 240 * A holder for parameter annotations. 241 */ 242 static class ParameterAnnotations { 243 List<CompoundAnnotationProxy> proxies; 244 245 void add(List<CompoundAnnotationProxy> newAnnotations) { 246 if (proxies == null) { 247 proxies = newAnnotations; 248 } else { 249 proxies = proxies.prependList(newAnnotations); 250 } 251 } 252 } 253 254 /** 255 * The set of attribute names for which warnings have been generated for the current class 256 */ 257 Set<Name> warnedAttrs = new HashSet<>(); 258 259 /** 260 * The prototype @Target Attribute.Compound if this class is an annotation annotated with 261 * {@code @Target} 262 */ 263 CompoundAnnotationProxy target; 264 265 /** 266 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with 267 * {@code @Repeatable} 268 */ 269 CompoundAnnotationProxy repeatable; 270 271 /** Get the ClassReader instance for this invocation. */ 272 public static ClassReader instance(Context context) { 273 ClassReader instance = context.get(classReaderKey); 274 if (instance == null) 275 instance = new ClassReader(context); 276 return instance; 277 } 278 279 /** Construct a new class reader. */ 280 @SuppressWarnings("this-escape") 281 protected ClassReader(Context context) { 282 context.put(classReaderKey, this); 283 annotate = Annotate.instance(context); 284 names = Names.instance(context); 285 syms = Symtab.instance(context); 286 types = Types.instance(context); 287 fileManager = context.get(JavaFileManager.class); 288 if (fileManager == null) 289 throw new AssertionError("FileManager initialization error"); 290 diagFactory = JCDiagnostic.Factory.instance(context); 291 dcfh = DeferredCompletionFailureHandler.instance(context); 292 293 log = Log.instance(context); 294 295 Options options = Options.instance(context); 296 verbose = options.isSet(Option.VERBOSE); 297 298 Source source = Source.instance(context); 299 preview = Preview.instance(context); 300 allowModules = Feature.MODULES.allowedInSource(source); 301 allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) && 302 Feature.VALUE_CLASSES.allowedInSource(source); 303 allowRecords = Feature.RECORDS.allowedInSource(source); 304 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source); 305 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source); 306 307 saveParameterNames = options.isSet(PARAMETERS); 308 309 profile = Profile.instance(context); 310 311 typevars = WriteableScope.create(syms.noSymbol); 312 313 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 314 315 initAttributeReaders(); 316 } 317 318 /** Add member to class unless it is synthetic. 319 */ 320 private void enterMember(ClassSymbol c, Symbol sym) { 321 // Synthetic members are not entered -- reason lost to history (optimization?). 322 // Lambda methods must be entered because they may have inner classes (which reference them) 323 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 324 c.members_field.enter(sym); 325 } 326 327 /* ********************************************************************** 328 * Error Diagnoses 329 ***********************************************************************/ 330 331 public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 332 return badClassFile(diagFactory.fragment(key, args)); 333 } 334 335 public ClassFinder.BadClassFile badClassFile(Fragment fragment) { 336 return badClassFile(diagFactory.fragment(fragment)); 337 } 338 339 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) { 340 return new ClassFinder.BadClassFile ( 341 currentOwner.enclClass(), 342 currentClassFile, 343 diagnostic, 344 diagFactory, 345 dcfh); 346 } 347 348 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) { 349 return new ClassFinder.BadEnclosingMethodAttr ( 350 currentOwner.enclClass(), 351 currentClassFile, 352 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)), 353 diagFactory, 354 dcfh); 355 } 356 357 /* ********************************************************************** 358 * Buffer Access 359 ***********************************************************************/ 360 361 /** Read a character. 362 */ 363 char nextChar() { 364 char res; 365 try { 366 res = buf.getChar(bp); 367 } catch (UnderflowException e) { 368 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 369 } 370 bp += 2; 371 return res; 372 } 373 374 /** Read a byte. 375 */ 376 int nextByte() { 377 try { 378 return buf.getByte(bp++) & 0xFF; 379 } catch (UnderflowException e) { 380 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 381 } 382 } 383 384 /** Read an integer. 385 */ 386 int nextInt() { 387 int res; 388 try { 389 res = buf.getInt(bp); 390 } catch (UnderflowException e) { 391 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 392 } 393 bp += 4; 394 return res; 395 } 396 397 /* ********************************************************************** 398 * Constant Pool Access 399 ***********************************************************************/ 400 401 /** Read module_flags. 402 */ 403 Set<ModuleFlags> readModuleFlags(int flags) { 404 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class); 405 for (ModuleFlags f : ModuleFlags.values()) { 406 if ((flags & f.value) != 0) 407 set.add(f); 408 } 409 return set; 410 } 411 412 /** Read resolution_flags. 413 */ 414 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) { 415 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class); 416 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) { 417 if ((flags & f.value) != 0) 418 set.add(f); 419 } 420 return set; 421 } 422 423 /** Read exports_flags. 424 */ 425 Set<ExportsFlag> readExportsFlags(int flags) { 426 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class); 427 for (ExportsFlag f: ExportsFlag.values()) { 428 if ((flags & f.value) != 0) 429 set.add(f); 430 } 431 return set; 432 } 433 434 /** Read opens_flags. 435 */ 436 Set<OpensFlag> readOpensFlags(int flags) { 437 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class); 438 for (OpensFlag f: OpensFlag.values()) { 439 if ((flags & f.value) != 0) 440 set.add(f); 441 } 442 return set; 443 } 444 445 /** Read requires_flags. 446 */ 447 Set<RequiresFlag> readRequiresFlags(int flags) { 448 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class); 449 for (RequiresFlag f: RequiresFlag.values()) { 450 if ((flags & f.value) != 0) 451 set.add(f); 452 } 453 return set; 454 } 455 456 /* ********************************************************************** 457 * Reading Types 458 ***********************************************************************/ 459 460 /** The unread portion of the currently read type is 461 * signature[sigp..siglimit-1]. 462 */ 463 byte[] signature; 464 int sigp; 465 int siglimit; 466 boolean sigEnterPhase = false; 467 468 /** Convert signature to type, where signature is a byte array segment. 469 */ 470 Type sigToType(byte[] sig, int offset, int len) { 471 signature = sig; 472 sigp = offset; 473 siglimit = offset + len; 474 return sigToType(); 475 } 476 477 /** Convert signature to type, where signature is implicit. 478 */ 479 Type sigToType() { 480 switch ((char) signature[sigp]) { 481 case 'T': 482 sigp++; 483 int start = sigp; 484 while (signature[sigp] != ';') sigp++; 485 sigp++; 486 return sigEnterPhase 487 ? Type.noType 488 : findTypeVar(readName(signature, start, sigp - 1 - start)); 489 case '+': { 490 sigp++; 491 Type t = sigToType(); 492 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 493 } 494 case '*': 495 sigp++; 496 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 497 syms.boundClass); 498 case '-': { 499 sigp++; 500 Type t = sigToType(); 501 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 502 } 503 case 'B': 504 sigp++; 505 return syms.byteType; 506 case 'C': 507 sigp++; 508 return syms.charType; 509 case 'D': 510 sigp++; 511 return syms.doubleType; 512 case 'F': 513 sigp++; 514 return syms.floatType; 515 case 'I': 516 sigp++; 517 return syms.intType; 518 case 'J': 519 sigp++; 520 return syms.longType; 521 case 'L': 522 { 523 // int oldsigp = sigp; 524 Type t = classSigToType(); 525 if (sigp < siglimit && signature[sigp] == '.') 526 throw badClassFile("deprecated inner class signature syntax " + 527 "(please recompile from source)"); 528 /* 529 System.err.println(" decoded " + 530 new String(signature, oldsigp, sigp-oldsigp) + 531 " => " + t + " outer " + t.outer()); 532 */ 533 return t; 534 } 535 case 'S': 536 sigp++; 537 return syms.shortType; 538 case 'V': 539 sigp++; 540 return syms.voidType; 541 case 'Z': 542 sigp++; 543 return syms.booleanType; 544 case '[': 545 sigp++; 546 return new ArrayType(sigToType(), syms.arrayClass); 547 case '(': 548 sigp++; 549 List<Type> argtypes = sigToTypes(')'); 550 Type restype = sigToType(); 551 List<Type> thrown = List.nil(); 552 while (sigp < siglimit && signature[sigp] == '^') { 553 sigp++; 554 thrown = thrown.prepend(sigToType()); 555 } 556 // if there is a typevar in the throws clause we should state it. 557 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 558 if (l.head.hasTag(TYPEVAR)) { 559 l.head.tsym.flags_field |= THROWS; 560 } 561 } 562 return new MethodType(argtypes, 563 restype, 564 thrown.reverse(), 565 syms.methodClass); 566 case '<': 567 typevars = typevars.dup(currentOwner); 568 Type poly = new ForAll(sigToTypeParams(), sigToType()); 569 typevars = typevars.leave(); 570 return poly; 571 default: 572 throw badClassFile("bad.signature", quoteBadSignature()); 573 } 574 } 575 576 byte[] signatureBuffer = new byte[0]; 577 int sbp = 0; 578 /** Convert class signature to type, where signature is implicit. 579 */ 580 Type classSigToType() { 581 if (signature[sigp] != 'L') 582 throw badClassFile("bad.class.signature", quoteBadSignature()); 583 sigp++; 584 Type outer = Type.noType; 585 int startSbp = sbp; 586 587 while (true) { 588 final byte c = signature[sigp++]; 589 switch (c) { 590 591 case ';': { // end 592 ClassSymbol t = enterClass(readName(signatureBuffer, 593 startSbp, 594 sbp - startSbp)); 595 596 try { 597 if (outer == Type.noType) { 598 ClassType et = (ClassType) t.erasure(types); 599 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata()); 600 } 601 return new ClassType(outer, List.nil(), t, List.nil()); 602 } finally { 603 sbp = startSbp; 604 } 605 } 606 607 case '<': // generic arguments 608 ClassSymbol t = enterClass(readName(signatureBuffer, 609 startSbp, 610 sbp - startSbp)); 611 List<Type> actuals = sigToTypes('>'); 612 List<Type> formals = ((ClassType)t.type.tsym.type).typarams_field; 613 if (formals != null) { 614 if (actuals.isEmpty()) 615 actuals = formals; 616 } 617 /* actualsCp is final as it will be captured by the inner class below. We could avoid defining 618 * this additional local variable and depend on field ClassType::typarams_field which `actuals` is 619 * assigned to but then we would have a dependendy on the internal representation of ClassType which 620 * could change in the future 621 */ 622 final List<Type> actualsCp = actuals; 623 outer = new ClassType(outer, actuals, t, List.nil()) { 624 boolean completed = false; 625 boolean typeArgsSet = false; 626 @Override @DefinedBy(Api.LANGUAGE_MODEL) 627 public Type getEnclosingType() { 628 if (!completed) { 629 completed = true; 630 tsym.apiComplete(); 631 Type enclosingType = tsym.type.getEnclosingType(); 632 if (enclosingType != Type.noType) { 633 List<Type> typeArgs = 634 super.getEnclosingType().allparams(); 635 List<Type> typeParams = 636 enclosingType.allparams(); 637 if (typeParams.length() != typeArgs.length()) { 638 // no "rare" types 639 super.setEnclosingType(types.erasure(enclosingType)); 640 } else { 641 super.setEnclosingType(types.subst(enclosingType, 642 typeParams, 643 typeArgs)); 644 } 645 } else { 646 super.setEnclosingType(Type.noType); 647 } 648 } 649 return super.getEnclosingType(); 650 } 651 @Override 652 public void setEnclosingType(Type outer) { 653 throw new UnsupportedOperationException(); 654 } 655 656 @Override 657 public List<Type> getTypeArguments() { 658 if (!typeArgsSet) { 659 typeArgsSet = true; 660 List<Type> formalsCp = ((ClassType)t.type.tsym.type).typarams_field; 661 if (formalsCp != null && !formalsCp.isEmpty()) { 662 if (actualsCp.length() == formalsCp.length()) { 663 List<Type> a = actualsCp; 664 List<Type> f = formalsCp; 665 while (a.nonEmpty()) { 666 a.head = a.head.withTypeVar(f.head); 667 a = a.tail; 668 f = f.tail; 669 } 670 } 671 } 672 } 673 return super.getTypeArguments(); 674 } 675 }; 676 switch (signature[sigp++]) { 677 case ';': 678 if (sigp < siglimit && signature[sigp] == '.') { 679 // support old-style GJC signatures 680 // The signature produced was 681 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 682 // rather than say 683 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 684 // so we skip past ".Lfoo/Outer$" 685 sigp += (sbp - startSbp) + // "foo/Outer" 686 3; // ".L" and "$" 687 signatureBuffer[sbp++] = (byte)'$'; 688 break; 689 } else { 690 sbp = startSbp; 691 return outer; 692 } 693 case '.': 694 signatureBuffer[sbp++] = (byte)'$'; 695 break; 696 default: 697 throw new AssertionError(signature[sigp-1]); 698 } 699 continue; 700 701 case '.': 702 //we have seen an enclosing non-generic class 703 if (outer != Type.noType) { 704 t = enterClass(readName(signatureBuffer, 705 startSbp, 706 sbp - startSbp)); 707 outer = new ClassType(outer, List.nil(), t, List.nil()); 708 } 709 signatureBuffer[sbp++] = (byte)'$'; 710 continue; 711 case '/': 712 signatureBuffer[sbp++] = (byte)'.'; 713 continue; 714 default: 715 signatureBuffer[sbp++] = c; 716 continue; 717 } 718 } 719 } 720 721 /** Quote a bogus signature for display inside an error message. 722 */ 723 String quoteBadSignature() { 724 String sigString; 725 try { 726 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE); 727 } catch (InvalidUtfException e) { 728 throw new AssertionError(e); 729 } 730 if (sigString.length() > 32) 731 sigString = sigString.substring(0, 32) + "..."; 732 return "\"" + sigString + "\""; 733 } 734 735 /** Convert (implicit) signature to list of types 736 * until `terminator' is encountered. 737 */ 738 List<Type> sigToTypes(char terminator) { 739 List<Type> head = List.of(null); 740 List<Type> tail = head; 741 while (signature[sigp] != terminator) 742 tail = tail.setTail(List.of(sigToType())); 743 sigp++; 744 return head.tail; 745 } 746 747 /** Convert signature to type parameters, where signature is a byte 748 * array segment. 749 */ 750 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 751 signature = sig; 752 sigp = offset; 753 siglimit = offset + len; 754 return sigToTypeParams(); 755 } 756 757 /** Convert signature to type parameters, where signature is implicit. 758 */ 759 List<Type> sigToTypeParams() { 760 List<Type> tvars = List.nil(); 761 if (signature[sigp] == '<') { 762 sigp++; 763 int start = sigp; 764 sigEnterPhase = true; 765 while (signature[sigp] != '>') 766 tvars = tvars.prepend(sigToTypeParam()); 767 sigEnterPhase = false; 768 sigp = start; 769 while (signature[sigp] != '>') 770 sigToTypeParam(); 771 sigp++; 772 } 773 return tvars.reverse(); 774 } 775 776 /** Convert (implicit) signature to type parameter. 777 */ 778 Type sigToTypeParam() { 779 int start = sigp; 780 while (signature[sigp] != ':') sigp++; 781 Name name = readName(signature, start, sigp - start); 782 TypeVar tvar; 783 if (sigEnterPhase) { 784 tvar = new TypeVar(name, currentOwner, syms.botType); 785 typevars.enter(tvar.tsym); 786 } else { 787 tvar = (TypeVar)findTypeVar(name); 788 } 789 List<Type> bounds = List.nil(); 790 boolean allInterfaces = false; 791 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 792 sigp++; 793 allInterfaces = true; 794 } 795 while (signature[sigp] == ':') { 796 sigp++; 797 bounds = bounds.prepend(sigToType()); 798 } 799 if (!sigEnterPhase) { 800 types.setBounds(tvar, bounds.reverse(), allInterfaces); 801 } 802 return tvar; 803 } 804 805 /** Find type variable with given name in `typevars' scope. 806 */ 807 Type findTypeVar(Name name) { 808 Symbol s = typevars.findFirst(name); 809 if (s != null) { 810 return s.type; 811 } else { 812 if (readingClassAttr) { 813 // While reading the class attribute, the supertypes 814 // might refer to a type variable from an enclosing element 815 // (method or class). 816 // If the type variable is defined in the enclosing class, 817 // we can actually find it in 818 // currentOwner.owner.type.getTypeArguments() 819 // However, until we have read the enclosing method attribute 820 // we don't know for sure if this owner is correct. It could 821 // be a method and there is no way to tell before reading the 822 // enclosing method attribute. 823 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 824 missingTypeVariables = missingTypeVariables.prepend(t); 825 // System.err.println("Missing type var " + name); 826 return t; 827 } 828 throw badClassFile("undecl.type.var", name); 829 } 830 } 831 832 private Name readName(byte[] buf, int off, int len) { 833 try { 834 return names.fromUtf(buf, off, len, utf8validation); 835 } catch (InvalidUtfException e) { 836 if (warnOnIllegalUtf8) { 837 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile, 838 Fragments.BadUtf8ByteSequenceAt(sigp))); 839 return names.fromUtfLax(buf, off, len); 840 } 841 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp)); 842 } 843 } 844 845 /* ********************************************************************** 846 * Reading Attributes 847 ***********************************************************************/ 848 849 protected enum AttributeKind { CLASS, MEMBER } 850 851 protected abstract class AttributeReader { 852 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 853 this.name = name; 854 this.version = version; 855 this.kinds = kinds; 856 } 857 858 protected boolean accepts(AttributeKind kind) { 859 if (kinds.contains(kind)) { 860 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 861 return true; 862 863 if (lintClassfile && !warnedAttrs.contains(name)) { 864 JavaFileObject prev = log.useSource(currentClassFile); 865 try { 866 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, 867 Warnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion)); 868 } finally { 869 log.useSource(prev); 870 } 871 warnedAttrs.add(name); 872 } 873 } 874 return false; 875 } 876 877 protected abstract void read(Symbol sym, int attrLen); 878 879 protected final Name name; 880 protected final ClassFile.Version version; 881 protected final Set<AttributeKind> kinds; 882 } 883 884 protected Set<AttributeKind> CLASS_ATTRIBUTE = 885 EnumSet.of(AttributeKind.CLASS); 886 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 887 EnumSet.of(AttributeKind.MEMBER); 888 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 889 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 890 891 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 892 893 private void initAttributeReaders() { 894 AttributeReader[] readers = { 895 // v45.3 attributes 896 897 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 898 protected void read(Symbol sym, int attrLen) { 899 if (saveParameterNames) 900 ((MethodSymbol)sym).code = readCode(sym); 901 else 902 bp = bp + attrLen; 903 } 904 }, 905 906 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 907 protected void read(Symbol sym, int attrLen) { 908 Object v = poolReader.getConstant(nextChar()); 909 // Ignore ConstantValue attribute if field not final. 910 if ((sym.flags() & FINAL) == 0) { 911 return; 912 } 913 VarSymbol var = (VarSymbol) sym; 914 switch (var.type.getTag()) { 915 case BOOLEAN: 916 case BYTE: 917 case CHAR: 918 case SHORT: 919 case INT: 920 checkType(var, Integer.class, v); 921 break; 922 case LONG: 923 checkType(var, Long.class, v); 924 break; 925 case FLOAT: 926 checkType(var, Float.class, v); 927 break; 928 case DOUBLE: 929 checkType(var, Double.class, v); 930 break; 931 case CLASS: 932 if (var.type.tsym == syms.stringType.tsym) { 933 checkType(var, String.class, v); 934 } else { 935 throw badClassFile("bad.constant.value.type", var.type); 936 } 937 break; 938 default: 939 // ignore ConstantValue attribute if type is not primitive or String 940 return; 941 } 942 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) { 943 throw badClassFile("bad.constant.range", v, var, var.type); 944 } 945 var.setData(v); 946 } 947 948 void checkType(Symbol var, Class<?> clazz, Object value) { 949 if (!clazz.isInstance(value)) { 950 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName()); 951 } 952 } 953 }, 954 955 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 956 protected void read(Symbol sym, int attrLen) { 957 Symbol s = sym.owner.kind == MDL ? sym.owner : sym; 958 959 s.flags_field |= DEPRECATED; 960 } 961 }, 962 963 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 964 protected void read(Symbol sym, int attrLen) { 965 int nexceptions = nextChar(); 966 List<Type> thrown = List.nil(); 967 for (int j = 0; j < nexceptions; j++) 968 thrown = thrown.prepend(poolReader.getClass(nextChar()).type); 969 if (sym.type.getThrownTypes().isEmpty()) 970 sym.type.asMethodType().thrown = thrown.reverse(); 971 } 972 }, 973 974 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 975 protected void read(Symbol sym, int attrLen) { 976 ClassSymbol c = (ClassSymbol) sym; 977 if (currentModule.module_info == c) { 978 //prevent entering the classes too soon: 979 skipInnerClasses(); 980 } else { 981 readInnerClasses(c); 982 } 983 } 984 }, 985 986 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 987 protected void read(Symbol sym, int attrLen) { 988 int newbp = bp + attrLen; 989 if (saveParameterNames) { 990 // Pick up parameter names from the variable table. 991 // Parameter names are not explicitly identified as such, 992 // but all parameter name entries in the LocalVariableTable 993 // have a start_pc of 0. Therefore, we record the name 994 // indices of all slots with a start_pc of zero in the 995 // parameterNameIndices array. 996 // Note that this implicitly honors the JVMS spec that 997 // there may be more than one LocalVariableTable, and that 998 // there is no specified ordering for the entries. 999 int numEntries = nextChar(); 1000 for (int i = 0; i < numEntries; i++) { 1001 int start_pc = nextChar(); 1002 int length = nextChar(); 1003 int nameIndex = nextChar(); 1004 int sigIndex = nextChar(); 1005 int register = nextChar(); 1006 if (start_pc == 0) { 1007 // ensure array large enough 1008 if (register >= parameterNameIndicesLvt.length) { 1009 int newSize = 1010 Math.max(register + 1, parameterNameIndicesLvt.length + 8); 1011 parameterNameIndicesLvt = 1012 Arrays.copyOf(parameterNameIndicesLvt, newSize); 1013 } 1014 parameterNameIndicesLvt[register] = nameIndex; 1015 } 1016 } 1017 } 1018 bp = newbp; 1019 } 1020 }, 1021 1022 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1023 protected void read(Symbol sym, int attrLen) { 1024 ClassSymbol c = (ClassSymbol) sym; 1025 Name n = poolReader.getName(nextChar()); 1026 c.sourcefile = new SourceFileObject(n); 1027 // If the class is a toplevel class, originating from a Java source file, 1028 // but the class name does not match the file name, then it is 1029 // an auxiliary class. 1030 String sn = n.toString(); 1031 if (c.owner.kind == PCK && 1032 sn.endsWith(".java") && 1033 !sn.equals(c.name.toString()+".java")) { 1034 c.flags_field |= AUXILIARY; 1035 } 1036 } 1037 }, 1038 1039 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1040 protected void read(Symbol sym, int attrLen) { 1041 sym.flags_field |= SYNTHETIC; 1042 } 1043 }, 1044 1045 // standard v49 attributes 1046 1047 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1048 protected void read(Symbol sym, int attrLen) { 1049 int newbp = bp + attrLen; 1050 readEnclosingMethodAttr(sym); 1051 bp = newbp; 1052 } 1053 }, 1054 1055 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1056 protected void read(Symbol sym, int attrLen) { 1057 if (sym.kind == TYP) { 1058 ClassSymbol c = (ClassSymbol) sym; 1059 readingClassAttr = true; 1060 try { 1061 ClassType ct1 = (ClassType)c.type; 1062 Assert.check(c == currentOwner); 1063 ct1.typarams_field = poolReader.getName(nextChar()) 1064 .map(ClassReader.this::sigToTypeParams); 1065 ct1.supertype_field = sigToType(); 1066 ListBuffer<Type> is = new ListBuffer<>(); 1067 while (sigp != siglimit) is.append(sigToType()); 1068 ct1.interfaces_field = is.toList(); 1069 } finally { 1070 readingClassAttr = false; 1071 } 1072 } else { 1073 List<Type> thrown = sym.type.getThrownTypes(); 1074 sym.type = poolReader.getType(nextChar()); 1075 //- System.err.println(" # " + sym.type); 1076 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1077 sym.type.asMethodType().thrown = thrown; 1078 1079 } 1080 } 1081 }, 1082 1083 // v49 annotation attributes 1084 1085 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1086 protected void read(Symbol sym, int attrLen) { 1087 attachAnnotationDefault(sym); 1088 } 1089 }, 1090 1091 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1092 protected void read(Symbol sym, int attrLen) { 1093 attachAnnotations(sym); 1094 } 1095 }, 1096 1097 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1098 protected void read(Symbol sym, int attrLen) { 1099 readParameterAnnotations(sym); 1100 } 1101 }, 1102 1103 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1104 protected void read(Symbol sym, int attrLen) { 1105 attachAnnotations(sym); 1106 } 1107 }, 1108 1109 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1110 protected void read(Symbol sym, int attrLen) { 1111 readParameterAnnotations(sym); 1112 } 1113 }, 1114 1115 // additional "legacy" v49 attributes, superseded by flags 1116 1117 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1118 protected void read(Symbol sym, int attrLen) { 1119 sym.flags_field |= ANNOTATION; 1120 } 1121 }, 1122 1123 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1124 protected void read(Symbol sym, int attrLen) { 1125 sym.flags_field |= BRIDGE; 1126 } 1127 }, 1128 1129 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1130 protected void read(Symbol sym, int attrLen) { 1131 sym.flags_field |= ENUM; 1132 } 1133 }, 1134 1135 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1136 protected void read(Symbol sym, int attrLen) { 1137 sym.flags_field |= VARARGS; 1138 } 1139 }, 1140 1141 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1142 protected void read(Symbol sym, int attrLen) { 1143 attachTypeAnnotations(sym); 1144 } 1145 }, 1146 1147 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1148 protected void read(Symbol sym, int attrLen) { 1149 attachTypeAnnotations(sym); 1150 } 1151 }, 1152 1153 // The following attributes for a Code attribute are not currently handled 1154 // StackMapTable 1155 // SourceDebugExtension 1156 // LineNumberTable 1157 // LocalVariableTypeTable 1158 1159 // standard v52 attributes 1160 1161 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1162 protected void read(Symbol sym, int attrlen) { 1163 int newbp = bp + attrlen; 1164 if (saveParameterNames) { 1165 int numEntries = nextByte(); 1166 allParameterAccessFlags = new int[numEntries]; 1167 parameterNameIndicesMp = new int[numEntries]; 1168 parameterAccessFlags = new int[numEntries]; 1169 int allParamIndex = 0; 1170 int index = 0; 1171 for (int i = 0; i < numEntries; i++) { 1172 int nameIndex = nextChar(); 1173 int flags = nextChar(); 1174 allParameterAccessFlags[allParamIndex++] = flags; 1175 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) { 1176 continue; 1177 } 1178 parameterNameIndicesMp[index] = nameIndex; 1179 parameterAccessFlags[index] = flags; 1180 index++; 1181 } 1182 } 1183 bp = newbp; 1184 } 1185 }, 1186 1187 // standard v53 attributes 1188 1189 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) { 1190 @Override 1191 protected boolean accepts(AttributeKind kind) { 1192 return super.accepts(kind) && allowModules; 1193 } 1194 protected void read(Symbol sym, int attrLen) { 1195 if (sym.kind == TYP && sym.owner.kind == MDL) { 1196 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1197 ListBuffer<Directive> directives = new ListBuffer<>(); 1198 1199 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName); 1200 if (currentModule.name != moduleName) { 1201 throw badClassFile("module.name.mismatch", moduleName, currentModule.name); 1202 } 1203 1204 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar()); 1205 msym.flags.addAll(moduleFlags); 1206 msym.version = optPoolEntry(nextChar(), poolReader::getName, null); 1207 1208 ListBuffer<RequiresDirective> requires = new ListBuffer<>(); 1209 int nrequires = nextChar(); 1210 for (int i = 0; i < nrequires; i++) { 1211 ModuleSymbol rsym = poolReader.getModule(nextChar()); 1212 Set<RequiresFlag> flags = readRequiresFlags(nextChar()); 1213 if (rsym == syms.java_base && majorVersion >= V54.major) { 1214 if (flags.contains(RequiresFlag.TRANSITIVE)) { 1215 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE); 1216 } 1217 if (flags.contains(RequiresFlag.STATIC_PHASE)) { 1218 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE); 1219 } 1220 } 1221 nextChar(); // skip compiled version 1222 requires.add(new RequiresDirective(rsym, flags)); 1223 } 1224 msym.requires = requires.toList(); 1225 directives.addAll(msym.requires); 1226 1227 ListBuffer<ExportsDirective> exports = new ListBuffer<>(); 1228 int nexports = nextChar(); 1229 for (int i = 0; i < nexports; i++) { 1230 PackageSymbol p = poolReader.getPackage(nextChar()); 1231 Set<ExportsFlag> flags = readExportsFlags(nextChar()); 1232 int nto = nextChar(); 1233 List<ModuleSymbol> to; 1234 if (nto == 0) { 1235 to = null; 1236 } else { 1237 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1238 for (int t = 0; t < nto; t++) 1239 lb.append(poolReader.getModule(nextChar())); 1240 to = lb.toList(); 1241 } 1242 exports.add(new ExportsDirective(p, to, flags)); 1243 } 1244 msym.exports = exports.toList(); 1245 directives.addAll(msym.exports); 1246 ListBuffer<OpensDirective> opens = new ListBuffer<>(); 1247 int nopens = nextChar(); 1248 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) { 1249 throw badClassFile("module.non.zero.opens", currentModule.name); 1250 } 1251 for (int i = 0; i < nopens; i++) { 1252 PackageSymbol p = poolReader.getPackage(nextChar()); 1253 Set<OpensFlag> flags = readOpensFlags(nextChar()); 1254 int nto = nextChar(); 1255 List<ModuleSymbol> to; 1256 if (nto == 0) { 1257 to = null; 1258 } else { 1259 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1260 for (int t = 0; t < nto; t++) 1261 lb.append(poolReader.getModule(nextChar())); 1262 to = lb.toList(); 1263 } 1264 opens.add(new OpensDirective(p, to, flags)); 1265 } 1266 msym.opens = opens.toList(); 1267 directives.addAll(msym.opens); 1268 1269 msym.directives = directives.toList(); 1270 1271 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>(); 1272 int nuses = nextChar(); 1273 for (int i = 0; i < nuses; i++) { 1274 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper); 1275 uses.add(new InterimUsesDirective(srvc)); 1276 } 1277 interimUses = uses.toList(); 1278 1279 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>(); 1280 int nprovides = nextChar(); 1281 for (int p = 0; p < nprovides; p++) { 1282 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper); 1283 int nimpls = nextChar(); 1284 ListBuffer<Name> impls = new ListBuffer<>(); 1285 for (int i = 0; i < nimpls; i++) { 1286 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper)); 1287 provides.add(new InterimProvidesDirective(srvc, impls.toList())); 1288 } 1289 } 1290 interimProvides = provides.toList(); 1291 } 1292 } 1293 1294 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException { 1295 byte[] buf = ClassFile.internalize(arr, offset, length); 1296 try { 1297 return names.fromUtf(buf, 0, buf.length, utf8validation); 1298 } catch (InvalidUtfException e) { 1299 if (warnOnIllegalUtf8) { 1300 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile, 1301 Fragments.BadUtf8ByteSequenceAt(e.getOffset()))); 1302 return names.fromUtfLax(buf, 0, buf.length); 1303 } 1304 throw e; 1305 } 1306 } 1307 }, 1308 1309 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) { 1310 @Override 1311 protected boolean accepts(AttributeKind kind) { 1312 return super.accepts(kind) && allowModules; 1313 } 1314 protected void read(Symbol sym, int attrLen) { 1315 if (sym.kind == TYP && sym.owner.kind == MDL) { 1316 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1317 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar())); 1318 } 1319 } 1320 }, 1321 1322 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) { 1323 @Override 1324 protected boolean accepts(AttributeKind kind) { 1325 return super.accepts(kind) && allowRecords; 1326 } 1327 protected void read(Symbol sym, int attrLen) { 1328 if (sym.kind == TYP) { 1329 sym.flags_field |= RECORD; 1330 } 1331 int componentCount = nextChar(); 1332 ListBuffer<RecordComponent> components = new ListBuffer<>(); 1333 for (int i = 0; i < componentCount; i++) { 1334 Name name = poolReader.getName(nextChar()); 1335 Type type = poolReader.getType(nextChar()); 1336 RecordComponent c = new RecordComponent(name, type, sym); 1337 readAttrs(c, AttributeKind.MEMBER); 1338 components.add(c); 1339 } 1340 ((ClassSymbol) sym).setRecordComponents(components.toList()); 1341 } 1342 }, 1343 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) { 1344 @Override 1345 protected boolean accepts(AttributeKind kind) { 1346 return super.accepts(kind) && allowSealedTypes; 1347 } 1348 protected void read(Symbol sym, int attrLen) { 1349 if (sym.kind == TYP) { 1350 ListBuffer<Symbol> subtypes = new ListBuffer<>(); 1351 int numberOfPermittedSubtypes = nextChar(); 1352 for (int i = 0; i < numberOfPermittedSubtypes; i++) { 1353 subtypes.add(poolReader.getClass(nextChar())); 1354 } 1355 ((ClassSymbol)sym).setPermittedSubclasses(subtypes.toList()); 1356 } 1357 } 1358 }, 1359 }; 1360 1361 for (AttributeReader r: readers) 1362 attributeReaders.put(r.name, r); 1363 } 1364 1365 protected void readEnclosingMethodAttr(Symbol sym) { 1366 // sym is a nested class with an "Enclosing Method" attribute 1367 // remove sym from it's current owners scope and place it in 1368 // the scope specified by the attribute 1369 sym.owner.members().remove(sym); 1370 ClassSymbol self = (ClassSymbol)sym; 1371 ClassSymbol c = poolReader.getClass(nextChar()); 1372 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null); 1373 1374 if (c.members_field == null || c.kind != TYP) 1375 throw badClassFile("bad.enclosing.class", self, c); 1376 1377 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1378 if (nt != null && m == null) 1379 throw badEnclosingMethod(self); 1380 1381 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1382 self.owner = m != null ? m : c; 1383 if (self.name.isEmpty()) 1384 self.fullname = names.empty; 1385 else 1386 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1387 1388 if (m != null) { 1389 ((ClassType)sym.type).setEnclosingType(m.type); 1390 } else if ((self.flags_field & STATIC) == 0) { 1391 ((ClassType)sym.type).setEnclosingType(c.type); 1392 } else { 1393 ((ClassType)sym.type).setEnclosingType(Type.noType); 1394 } 1395 enterTypevars(self, self.type); 1396 if (!missingTypeVariables.isEmpty()) { 1397 ListBuffer<Type> typeVars = new ListBuffer<>(); 1398 for (Type typevar : missingTypeVariables) { 1399 typeVars.append(findTypeVar(typevar.tsym.name)); 1400 } 1401 foundTypeVariables = typeVars.toList(); 1402 } else { 1403 foundTypeVariables = List.nil(); 1404 } 1405 } 1406 1407 // See java.lang.Class 1408 private Name simpleBinaryName(Name self, Name enclosing) { 1409 if (!self.startsWith(enclosing)) { 1410 throw badClassFile("bad.enclosing.method", self); 1411 } 1412 1413 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1414 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1415 throw badClassFile("bad.enclosing.method", self); 1416 int index = 1; 1417 while (index < simpleBinaryName.length() && 1418 isAsciiDigit(simpleBinaryName.charAt(index))) 1419 index++; 1420 return names.fromString(simpleBinaryName.substring(index)); 1421 } 1422 1423 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1424 if (nt == null) 1425 return null; 1426 1427 MethodType type = nt.type.asMethodType(); 1428 1429 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1430 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1431 return (MethodSymbol)sym; 1432 } 1433 1434 if (nt.name != names.init) 1435 // not a constructor 1436 return null; 1437 if ((flags & INTERFACE) != 0) 1438 // no enclosing instance 1439 return null; 1440 if (nt.type.getParameterTypes().isEmpty()) 1441 // no parameters 1442 return null; 1443 1444 // A constructor of an inner class. 1445 // Remove the first argument (the enclosing instance) 1446 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail, 1447 nt.type.getReturnType(), 1448 nt.type.getThrownTypes(), 1449 syms.methodClass)); 1450 // Try searching again 1451 return findMethod(nt, scope, flags); 1452 } 1453 1454 /** Similar to Types.isSameType but avoids completion */ 1455 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1456 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1457 .prepend(types.erasure(mt1.getReturnType())); 1458 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1459 while (!types1.isEmpty() && !types2.isEmpty()) { 1460 if (types1.head.tsym != types2.head.tsym) 1461 return false; 1462 types1 = types1.tail; 1463 types2 = types2.tail; 1464 } 1465 return types1.isEmpty() && types2.isEmpty(); 1466 } 1467 1468 /** 1469 * Character.isDigit answers <tt>true</tt> to some non-ascii 1470 * digits. This one does not. <b>copied from java.lang.Class</b> 1471 */ 1472 private static boolean isAsciiDigit(char c) { 1473 return '0' <= c && c <= '9'; 1474 } 1475 1476 /** Read member attributes. 1477 */ 1478 void readMemberAttrs(Symbol sym) { 1479 readAttrs(sym, AttributeKind.MEMBER); 1480 } 1481 1482 void readAttrs(Symbol sym, AttributeKind kind) { 1483 char ac = nextChar(); 1484 for (int i = 0; i < ac; i++) { 1485 Name attrName = poolReader.getName(nextChar()); 1486 int attrLen = nextInt(); 1487 AttributeReader r = attributeReaders.get(attrName); 1488 if (r != null && r.accepts(kind)) 1489 r.read(sym, attrLen); 1490 else { 1491 bp = bp + attrLen; 1492 } 1493 } 1494 } 1495 1496 private boolean readingClassAttr = false; 1497 private List<Type> missingTypeVariables = List.nil(); 1498 private List<Type> foundTypeVariables = List.nil(); 1499 1500 /** Read class attributes. 1501 */ 1502 void readClassAttrs(ClassSymbol c) { 1503 readAttrs(c, AttributeKind.CLASS); 1504 } 1505 1506 /** Read code block. 1507 */ 1508 Code readCode(Symbol owner) { 1509 nextChar(); // max_stack 1510 nextChar(); // max_locals 1511 final int code_length = nextInt(); 1512 bp += code_length; 1513 final char exception_table_length = nextChar(); 1514 bp += exception_table_length * 8; 1515 readMemberAttrs(owner); 1516 return null; 1517 } 1518 1519 /* ********************************************************************** 1520 * Reading Java-language annotations 1521 ***********************************************************************/ 1522 1523 /** 1524 * Save annotations. 1525 */ 1526 List<CompoundAnnotationProxy> readAnnotations() { 1527 int numAttributes = nextChar(); 1528 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>(); 1529 for (int i = 0; i < numAttributes; i++) { 1530 annotations.append(readCompoundAnnotation()); 1531 } 1532 return annotations.toList(); 1533 } 1534 1535 /** Attach annotations. 1536 */ 1537 void attachAnnotations(final Symbol sym) { 1538 attachAnnotations(sym, readAnnotations()); 1539 } 1540 1541 /** 1542 * Attach annotations. 1543 */ 1544 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) { 1545 if (annotations.isEmpty()) { 1546 return; 1547 } 1548 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1549 for (CompoundAnnotationProxy proxy : annotations) { 1550 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName()) 1551 sym.flags_field |= PROPRIETARY; 1552 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) { 1553 if (profile != Profile.DEFAULT) { 1554 for (Pair<Name, Attribute> v : proxy.values) { 1555 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) { 1556 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) { 1557 sym.flags_field |= NOT_IN_PROFILE; 1558 } 1559 } 1560 } 1561 } 1562 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) { 1563 sym.flags_field |= PREVIEW_API; 1564 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE); 1565 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) { 1566 Assert.check(sym.kind == TYP); 1567 sym.flags_field |= VALUE_BASED; 1568 } else if (proxy.type.tsym.flatName() == syms.migratedValueClassInternalType.tsym.flatName()) { 1569 Assert.check(sym.kind == TYP); 1570 sym.flags_field |= MIGRATED_VALUE_CLASS; 1571 if (needsValueFlag(sym, sym.flags_field)) { 1572 sym.flags_field |= VALUE_CLASS; 1573 sym.flags_field &= ~IDENTITY_TYPE; 1574 } 1575 } else if (proxy.type.tsym.flatName() == syms.restrictedInternalType.tsym.flatName()) { 1576 Assert.check(sym.kind == MTH); 1577 sym.flags_field |= RESTRICTED; 1578 } else { 1579 if (proxy.type.tsym == syms.annotationTargetType.tsym) { 1580 target = proxy; 1581 } else if (proxy.type.tsym == syms.repeatableType.tsym) { 1582 repeatable = proxy; 1583 } else if (proxy.type.tsym == syms.deprecatedType.tsym) { 1584 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 1585 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL); 1586 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) { 1587 sym.flags_field |= PREVIEW_API; 1588 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE); 1589 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) { 1590 sym.flags_field |= VALUE_BASED; 1591 } else if (proxy.type.tsym == syms.migratedValueClassType.tsym && sym.kind == TYP) { 1592 sym.flags_field |= MIGRATED_VALUE_CLASS; 1593 if (needsValueFlag(sym, sym.flags_field)) { 1594 sym.flags_field |= VALUE_CLASS; 1595 sym.flags_field &= ~IDENTITY_TYPE; 1596 } 1597 } else if (proxy.type.tsym == syms.restrictedType.tsym) { 1598 Assert.check(sym.kind == MTH); 1599 sym.flags_field |= RESTRICTED; 1600 } 1601 proxies.append(proxy); 1602 } 1603 } 1604 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1605 } 1606 //where: 1607 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) { 1608 for (Pair<Name, Attribute> v : proxy.values) { 1609 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) { 1610 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) { 1611 sym.flags_field |= flag; 1612 } 1613 } 1614 } 1615 } 1616 1617 /** Read parameter annotations. 1618 */ 1619 void readParameterAnnotations(Symbol meth) { 1620 int numParameters; 1621 try { 1622 numParameters = buf.getByte(bp++) & 0xFF; 1623 } catch (UnderflowException e) { 1624 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 1625 } 1626 if (parameterAnnotations == null) { 1627 parameterAnnotations = new ParameterAnnotations[numParameters]; 1628 } else if (parameterAnnotations.length != numParameters) { 1629 //the RuntimeVisibleParameterAnnotations and RuntimeInvisibleParameterAnnotations 1630 //provide annotations for a different number of parameters, ignore: 1631 if (lintClassfile) { 1632 log.warning(LintCategory.CLASSFILE, Warnings.RuntimeVisibleInvisibleParamAnnotationsMismatch(currentClassFile)); 1633 } 1634 for (int pnum = 0; pnum < numParameters; pnum++) { 1635 readAnnotations(); 1636 } 1637 parameterAnnotations = null; 1638 return ; 1639 } 1640 for (int pnum = 0; pnum < numParameters; pnum++) { 1641 if (parameterAnnotations[pnum] == null) { 1642 parameterAnnotations[pnum] = new ParameterAnnotations(); 1643 } 1644 parameterAnnotations[pnum].add(readAnnotations()); 1645 } 1646 } 1647 1648 void attachTypeAnnotations(final Symbol sym) { 1649 int numAttributes = nextChar(); 1650 if (numAttributes != 0) { 1651 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1652 for (int i = 0; i < numAttributes; i++) 1653 proxies.append(readTypeAnnotation()); 1654 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1655 } 1656 } 1657 1658 /** Attach the default value for an annotation element. 1659 */ 1660 void attachAnnotationDefault(final Symbol sym) { 1661 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1662 final Attribute value = readAttributeValue(); 1663 1664 // The default value is set later during annotation. It might 1665 // be the case that the Symbol sym is annotated _after_ the 1666 // repeating instances that depend on this default value, 1667 // because of this we set an interim value that tells us this 1668 // element (most likely) has a default. 1669 // 1670 // Set interim value for now, reset just before we do this 1671 // properly at annotate time. 1672 meth.defaultValue = value; 1673 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1674 } 1675 1676 Type readTypeOrClassSymbol(int i) { 1677 return readTypeToProxy(i); 1678 } 1679 Type readTypeToProxy(int i) { 1680 if (currentModule.module_info == currentOwner) { 1681 return new ProxyType(i); 1682 } else { 1683 return poolReader.getType(i); 1684 } 1685 } 1686 1687 CompoundAnnotationProxy readCompoundAnnotation() { 1688 Type t; 1689 if (currentModule.module_info == currentOwner) { 1690 int cpIndex = nextChar(); 1691 t = new ProxyType(cpIndex); 1692 } else { 1693 t = readTypeOrClassSymbol(nextChar()); 1694 } 1695 int numFields = nextChar(); 1696 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1697 for (int i=0; i<numFields; i++) { 1698 Name name = poolReader.getName(nextChar()); 1699 Attribute value = readAttributeValue(); 1700 pairs.append(new Pair<>(name, value)); 1701 } 1702 return new CompoundAnnotationProxy(t, pairs.toList()); 1703 } 1704 1705 TypeAnnotationProxy readTypeAnnotation() { 1706 TypeAnnotationPosition position = readPosition(); 1707 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1708 1709 return new TypeAnnotationProxy(proxy, position); 1710 } 1711 1712 TypeAnnotationPosition readPosition() { 1713 int tag = nextByte(); // TargetType tag is a byte 1714 1715 if (!TargetType.isValidTargetTypeValue(tag)) 1716 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1717 1718 TargetType type = TargetType.fromTargetTypeValue(tag); 1719 1720 switch (type) { 1721 // instanceof 1722 case INSTANCEOF: { 1723 final int offset = nextChar(); 1724 final TypeAnnotationPosition position = 1725 TypeAnnotationPosition.instanceOf(readTypePath()); 1726 position.offset = offset; 1727 return position; 1728 } 1729 // new expression 1730 case NEW: { 1731 final int offset = nextChar(); 1732 final TypeAnnotationPosition position = 1733 TypeAnnotationPosition.newObj(readTypePath()); 1734 position.offset = offset; 1735 return position; 1736 } 1737 // constructor/method reference receiver 1738 case CONSTRUCTOR_REFERENCE: { 1739 final int offset = nextChar(); 1740 final TypeAnnotationPosition position = 1741 TypeAnnotationPosition.constructorRef(readTypePath()); 1742 position.offset = offset; 1743 return position; 1744 } 1745 case METHOD_REFERENCE: { 1746 final int offset = nextChar(); 1747 final TypeAnnotationPosition position = 1748 TypeAnnotationPosition.methodRef(readTypePath()); 1749 position.offset = offset; 1750 return position; 1751 } 1752 // local variable 1753 case LOCAL_VARIABLE: { 1754 final int table_length = nextChar(); 1755 final int[] newLvarOffset = new int[table_length]; 1756 final int[] newLvarLength = new int[table_length]; 1757 final int[] newLvarIndex = new int[table_length]; 1758 1759 for (int i = 0; i < table_length; ++i) { 1760 newLvarOffset[i] = nextChar(); 1761 newLvarLength[i] = nextChar(); 1762 newLvarIndex[i] = nextChar(); 1763 } 1764 1765 final TypeAnnotationPosition position = 1766 TypeAnnotationPosition.localVariable(readTypePath()); 1767 position.lvarOffset = newLvarOffset; 1768 position.lvarLength = newLvarLength; 1769 position.lvarIndex = newLvarIndex; 1770 return position; 1771 } 1772 // resource variable 1773 case RESOURCE_VARIABLE: { 1774 final int table_length = nextChar(); 1775 final int[] newLvarOffset = new int[table_length]; 1776 final int[] newLvarLength = new int[table_length]; 1777 final int[] newLvarIndex = new int[table_length]; 1778 1779 for (int i = 0; i < table_length; ++i) { 1780 newLvarOffset[i] = nextChar(); 1781 newLvarLength[i] = nextChar(); 1782 newLvarIndex[i] = nextChar(); 1783 } 1784 1785 final TypeAnnotationPosition position = 1786 TypeAnnotationPosition.resourceVariable(readTypePath()); 1787 position.lvarOffset = newLvarOffset; 1788 position.lvarLength = newLvarLength; 1789 position.lvarIndex = newLvarIndex; 1790 return position; 1791 } 1792 // exception parameter 1793 case EXCEPTION_PARAMETER: { 1794 final int exception_index = nextChar(); 1795 final TypeAnnotationPosition position = 1796 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1797 position.setExceptionIndex(exception_index); 1798 return position; 1799 } 1800 // method receiver 1801 case METHOD_RECEIVER: 1802 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1803 // type parameter 1804 case CLASS_TYPE_PARAMETER: { 1805 final int parameter_index = nextByte(); 1806 return TypeAnnotationPosition 1807 .typeParameter(readTypePath(), parameter_index); 1808 } 1809 case METHOD_TYPE_PARAMETER: { 1810 final int parameter_index = nextByte(); 1811 return TypeAnnotationPosition 1812 .methodTypeParameter(readTypePath(), parameter_index); 1813 } 1814 // type parameter bound 1815 case CLASS_TYPE_PARAMETER_BOUND: { 1816 final int parameter_index = nextByte(); 1817 final int bound_index = nextByte(); 1818 return TypeAnnotationPosition 1819 .typeParameterBound(readTypePath(), parameter_index, 1820 bound_index); 1821 } 1822 case METHOD_TYPE_PARAMETER_BOUND: { 1823 final int parameter_index = nextByte(); 1824 final int bound_index = nextByte(); 1825 return TypeAnnotationPosition 1826 .methodTypeParameterBound(readTypePath(), parameter_index, 1827 bound_index); 1828 } 1829 // class extends or implements clause 1830 case CLASS_EXTENDS: { 1831 final int type_index = nextChar(); 1832 return TypeAnnotationPosition.classExtends(readTypePath(), 1833 type_index); 1834 } 1835 // throws 1836 case THROWS: { 1837 final int type_index = nextChar(); 1838 return TypeAnnotationPosition.methodThrows(readTypePath(), 1839 type_index); 1840 } 1841 // method parameter 1842 case METHOD_FORMAL_PARAMETER: { 1843 final int parameter_index = nextByte(); 1844 return TypeAnnotationPosition.methodParameter(readTypePath(), 1845 parameter_index); 1846 } 1847 // type cast 1848 case CAST: { 1849 final int offset = nextChar(); 1850 final int type_index = nextByte(); 1851 final TypeAnnotationPosition position = 1852 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1853 position.offset = offset; 1854 return position; 1855 } 1856 // method/constructor/reference type argument 1857 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1858 final int offset = nextChar(); 1859 final int type_index = nextByte(); 1860 final TypeAnnotationPosition position = TypeAnnotationPosition 1861 .constructorInvocationTypeArg(readTypePath(), type_index); 1862 position.offset = offset; 1863 return position; 1864 } 1865 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1866 final int offset = nextChar(); 1867 final int type_index = nextByte(); 1868 final TypeAnnotationPosition position = TypeAnnotationPosition 1869 .methodInvocationTypeArg(readTypePath(), type_index); 1870 position.offset = offset; 1871 return position; 1872 } 1873 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1874 final int offset = nextChar(); 1875 final int type_index = nextByte(); 1876 final TypeAnnotationPosition position = TypeAnnotationPosition 1877 .constructorRefTypeArg(readTypePath(), type_index); 1878 position.offset = offset; 1879 return position; 1880 } 1881 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1882 final int offset = nextChar(); 1883 final int type_index = nextByte(); 1884 final TypeAnnotationPosition position = TypeAnnotationPosition 1885 .methodRefTypeArg(readTypePath(), type_index); 1886 position.offset = offset; 1887 return position; 1888 } 1889 // We don't need to worry about these 1890 case METHOD_RETURN: 1891 return TypeAnnotationPosition.methodReturn(readTypePath()); 1892 case FIELD: 1893 return TypeAnnotationPosition.field(readTypePath()); 1894 case UNKNOWN: 1895 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1896 default: 1897 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1898 } 1899 } 1900 1901 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1902 int len = nextByte(); 1903 ListBuffer<Integer> loc = new ListBuffer<>(); 1904 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1905 loc = loc.append(nextByte()); 1906 1907 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1908 1909 } 1910 1911 /** 1912 * Helper function to read an optional pool entry (with given function); this is used while parsing 1913 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor, 1914 * as per JVMS. 1915 */ 1916 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) { 1917 return (index == 0) ? 1918 defaultValue : 1919 poolFunc.apply(index); 1920 } 1921 1922 Attribute readAttributeValue() { 1923 char c; 1924 try { 1925 c = (char)buf.getByte(bp++); 1926 } catch (UnderflowException e) { 1927 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength())); 1928 } 1929 switch (c) { 1930 case 'B': 1931 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar())); 1932 case 'C': 1933 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar())); 1934 case 'D': 1935 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar())); 1936 case 'F': 1937 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar())); 1938 case 'I': 1939 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar())); 1940 case 'J': 1941 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar())); 1942 case 'S': 1943 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar())); 1944 case 'Z': 1945 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar())); 1946 case 's': 1947 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString()); 1948 case 'e': 1949 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar())); 1950 case 'c': 1951 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar())); 1952 case '[': { 1953 int n = nextChar(); 1954 ListBuffer<Attribute> l = new ListBuffer<>(); 1955 for (int i=0; i<n; i++) 1956 l.append(readAttributeValue()); 1957 return new ArrayAttributeProxy(l.toList()); 1958 } 1959 case '@': 1960 return readCompoundAnnotation(); 1961 default: 1962 throw new AssertionError("unknown annotation tag '" + c + "'"); 1963 } 1964 } 1965 1966 interface ProxyVisitor extends Attribute.Visitor { 1967 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1968 void visitClassAttributeProxy(ClassAttributeProxy proxy); 1969 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1970 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1971 } 1972 1973 static class EnumAttributeProxy extends Attribute { 1974 Type enumType; 1975 Name enumerator; 1976 public EnumAttributeProxy(Type enumType, Name enumerator) { 1977 super(null); 1978 this.enumType = enumType; 1979 this.enumerator = enumerator; 1980 } 1981 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1982 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1983 public String toString() { 1984 return "/*proxy enum*/" + enumType + "." + enumerator; 1985 } 1986 } 1987 1988 static class ClassAttributeProxy extends Attribute { 1989 Type classType; 1990 public ClassAttributeProxy(Type classType) { 1991 super(null); 1992 this.classType = classType; 1993 } 1994 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); } 1995 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1996 public String toString() { 1997 return "/*proxy class*/" + classType + ".class"; 1998 } 1999 } 2000 2001 static class ArrayAttributeProxy extends Attribute { 2002 List<Attribute> values; 2003 ArrayAttributeProxy(List<Attribute> values) { 2004 super(null); 2005 this.values = values; 2006 } 2007 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 2008 @Override @DefinedBy(Api.LANGUAGE_MODEL) 2009 public String toString() { 2010 return "{" + values + "}"; 2011 } 2012 } 2013 2014 /** A temporary proxy representing a compound attribute. 2015 */ 2016 static class CompoundAnnotationProxy extends Attribute { 2017 final List<Pair<Name,Attribute>> values; 2018 public CompoundAnnotationProxy(Type type, 2019 List<Pair<Name,Attribute>> values) { 2020 super(type); 2021 this.values = values; 2022 } 2023 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 2024 @Override @DefinedBy(Api.LANGUAGE_MODEL) 2025 public String toString() { 2026 StringBuilder buf = new StringBuilder(); 2027 buf.append("@"); 2028 buf.append(type.tsym.getQualifiedName()); 2029 buf.append("/*proxy*/{"); 2030 boolean first = true; 2031 for (List<Pair<Name,Attribute>> v = values; 2032 v.nonEmpty(); v = v.tail) { 2033 Pair<Name,Attribute> value = v.head; 2034 if (!first) buf.append(","); 2035 first = false; 2036 buf.append(value.fst); 2037 buf.append("="); 2038 buf.append(value.snd); 2039 } 2040 buf.append("}"); 2041 return buf.toString(); 2042 } 2043 } 2044 2045 /** A temporary proxy representing a type annotation. 2046 */ 2047 static class TypeAnnotationProxy { 2048 final CompoundAnnotationProxy compound; 2049 final TypeAnnotationPosition position; 2050 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 2051 TypeAnnotationPosition position) { 2052 this.compound = compound; 2053 this.position = position; 2054 } 2055 } 2056 2057 class AnnotationDeproxy implements ProxyVisitor { 2058 private ClassSymbol requestingOwner; 2059 2060 AnnotationDeproxy(ClassSymbol owner) { 2061 this.requestingOwner = owner; 2062 } 2063 2064 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 2065 // also must fill in types!!!! 2066 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 2067 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 2068 buf.append(deproxyCompound(l.head)); 2069 } 2070 return buf.toList(); 2071 } 2072 2073 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 2074 Type annotationType = resolvePossibleProxyType(a.type); 2075 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 2076 for (List<Pair<Name,Attribute>> l = a.values; 2077 l.nonEmpty(); 2078 l = l.tail) { 2079 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst); 2080 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 2081 } 2082 return new Attribute.Compound(annotationType, buf.toList()); 2083 } 2084 2085 MethodSymbol findAccessMethod(Type container, Name name) { 2086 CompletionFailure failure = null; 2087 try { 2088 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 2089 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 2090 return (MethodSymbol) sym; 2091 } 2092 } catch (CompletionFailure ex) { 2093 failure = ex; 2094 } 2095 // The method wasn't found: emit a warning and recover 2096 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 2097 try { 2098 if (lintClassfile) { 2099 if (failure == null) { 2100 log.warning(Warnings.AnnotationMethodNotFound(container, name)); 2101 } else { 2102 log.warning(Warnings.AnnotationMethodNotFoundReason(container, 2103 name, 2104 failure.getDetailValue()));//diagnostic, if present 2105 } 2106 } 2107 } finally { 2108 log.useSource(prevSource); 2109 } 2110 // Construct a new method type and symbol. Use bottom 2111 // type (typeof null) as return type because this type is 2112 // a subtype of all reference types and can be converted 2113 // to primitive types by unboxing. 2114 MethodType mt = new MethodType(List.nil(), 2115 syms.botType, 2116 List.nil(), 2117 syms.methodClass); 2118 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 2119 } 2120 2121 Attribute result; 2122 Type type; 2123 Attribute deproxy(Type t, Attribute a) { 2124 Type oldType = type; 2125 try { 2126 type = t; 2127 a.accept(this); 2128 return result; 2129 } finally { 2130 type = oldType; 2131 } 2132 } 2133 2134 // implement Attribute.Visitor below 2135 2136 public void visitConstant(Attribute.Constant value) { 2137 // assert value.type == type; 2138 result = value; 2139 } 2140 2141 public void visitClass(Attribute.Class clazz) { 2142 result = clazz; 2143 } 2144 2145 public void visitEnum(Attribute.Enum e) { 2146 throw new AssertionError(); // shouldn't happen 2147 } 2148 2149 public void visitCompound(Attribute.Compound compound) { 2150 throw new AssertionError(); // shouldn't happen 2151 } 2152 2153 public void visitArray(Attribute.Array array) { 2154 throw new AssertionError(); // shouldn't happen 2155 } 2156 2157 public void visitError(Attribute.Error e) { 2158 throw new AssertionError(); // shouldn't happen 2159 } 2160 2161 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 2162 // type.tsym.flatName() should == proxy.enumFlatName 2163 Type enumType = resolvePossibleProxyType(proxy.enumType); 2164 TypeSymbol enumTypeSym = enumType.tsym; 2165 VarSymbol enumerator = null; 2166 CompletionFailure failure = null; 2167 try { 2168 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 2169 if (sym.kind == VAR) { 2170 enumerator = (VarSymbol)sym; 2171 break; 2172 } 2173 } 2174 } 2175 catch (CompletionFailure ex) { 2176 failure = ex; 2177 } 2178 if (enumerator == null) { 2179 if (failure != null) { 2180 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile, 2181 enumTypeSym, 2182 proxy.enumerator, 2183 failure.getDiagnostic())); 2184 } else { 2185 log.warning(Warnings.UnknownEnumConstant(currentClassFile, 2186 enumTypeSym, 2187 proxy.enumerator)); 2188 } 2189 result = new Attribute.Enum(enumTypeSym.type, 2190 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 2191 } else { 2192 result = new Attribute.Enum(enumTypeSym.type, enumerator); 2193 } 2194 } 2195 2196 @Override 2197 public void visitClassAttributeProxy(ClassAttributeProxy proxy) { 2198 Type classType = resolvePossibleProxyType(proxy.classType); 2199 result = new Attribute.Class(types, classType); 2200 } 2201 2202 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 2203 int length = proxy.values.length(); 2204 Attribute[] ats = new Attribute[length]; 2205 Type elemtype = types.elemtype(type); 2206 int i = 0; 2207 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 2208 ats[i++] = deproxy(elemtype, p.head); 2209 } 2210 result = new Attribute.Array(type, ats); 2211 } 2212 2213 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 2214 result = deproxyCompound(proxy); 2215 } 2216 2217 Type resolvePossibleProxyType(Type t) { 2218 if (t instanceof ProxyType proxyType) { 2219 Assert.check(requestingOwner.owner.kind == MDL); 2220 ModuleSymbol prevCurrentModule = currentModule; 2221 currentModule = (ModuleSymbol) requestingOwner.owner; 2222 try { 2223 return proxyType.resolve(); 2224 } finally { 2225 currentModule = prevCurrentModule; 2226 } 2227 } else { 2228 return t; 2229 } 2230 } 2231 } 2232 2233 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable { 2234 final MethodSymbol sym; 2235 final Attribute value; 2236 final JavaFileObject classFile = currentClassFile; 2237 2238 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 2239 super(currentOwner.kind == MTH 2240 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2241 this.sym = sym; 2242 this.value = value; 2243 } 2244 2245 @Override 2246 public void run() { 2247 JavaFileObject previousClassFile = currentClassFile; 2248 try { 2249 // Reset the interim value set earlier in 2250 // attachAnnotationDefault(). 2251 sym.defaultValue = null; 2252 currentClassFile = classFile; 2253 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 2254 } finally { 2255 currentClassFile = previousClassFile; 2256 } 2257 } 2258 2259 @Override 2260 public String toString() { 2261 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 2262 } 2263 } 2264 2265 class AnnotationCompleter extends AnnotationDeproxy implements Runnable { 2266 final Symbol sym; 2267 final List<CompoundAnnotationProxy> l; 2268 final JavaFileObject classFile; 2269 2270 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 2271 super(currentOwner.kind == MTH 2272 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2273 if (sym.kind == TYP && sym.owner.kind == MDL) { 2274 this.sym = sym.owner; 2275 } else { 2276 this.sym = sym; 2277 } 2278 this.l = l; 2279 this.classFile = currentClassFile; 2280 } 2281 2282 @Override 2283 public void run() { 2284 JavaFileObject previousClassFile = currentClassFile; 2285 try { 2286 currentClassFile = classFile; 2287 List<Attribute.Compound> newList = deproxyCompoundList(l); 2288 for (Attribute.Compound attr : newList) { 2289 if (attr.type.tsym == syms.deprecatedType.tsym) { 2290 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 2291 Attribute forRemoval = attr.member(names.forRemoval); 2292 if (forRemoval instanceof Attribute.Constant constant) { 2293 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) { 2294 sym.flags_field |= DEPRECATED_REMOVAL; 2295 } 2296 } 2297 } 2298 } 2299 if (sym.annotationsPendingCompletion()) { 2300 sym.setDeclarationAttributes(newList); 2301 } else { 2302 sym.appendAttributes(newList); 2303 } 2304 } finally { 2305 currentClassFile = previousClassFile; 2306 } 2307 } 2308 2309 @Override 2310 public String toString() { 2311 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 2312 } 2313 } 2314 2315 class TypeAnnotationCompleter extends AnnotationCompleter { 2316 2317 List<TypeAnnotationProxy> proxies; 2318 2319 TypeAnnotationCompleter(Symbol sym, 2320 List<TypeAnnotationProxy> proxies) { 2321 super(sym, List.nil()); 2322 this.proxies = proxies; 2323 } 2324 2325 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 2326 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 2327 for (TypeAnnotationProxy proxy: proxies) { 2328 Attribute.Compound compound = deproxyCompound(proxy.compound); 2329 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 2330 buf.add(typeCompound); 2331 } 2332 return buf.toList(); 2333 } 2334 2335 @Override 2336 public void run() { 2337 JavaFileObject previousClassFile = currentClassFile; 2338 try { 2339 currentClassFile = classFile; 2340 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 2341 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 2342 addTypeAnnotationsToSymbol(sym, newList); 2343 } finally { 2344 currentClassFile = previousClassFile; 2345 } 2346 } 2347 } 2348 2349 /** 2350 * Rewrites types in the given symbol to include type annotations. 2351 * 2352 * <p>The list of type annotations includes annotations for all types in the signature of the 2353 * symbol. Associating the annotations with the correct type requires interpreting the JVMS 2354 * 4.7.20-A target_type to locate the correct type to rewrite, and then interpreting the JVMS 2355 * 4.7.20.2 type_path to associate the annotation with the correct contained type. 2356 */ 2357 private void addTypeAnnotationsToSymbol(Symbol s, List<Attribute.TypeCompound> attributes) { 2358 try { 2359 new TypeAnnotationSymbolVisitor(attributes).visit(s, null); 2360 } catch (CompletionFailure ex) { 2361 JavaFileObject prev = log.useSource(currentClassFile); 2362 try { 2363 log.error(Errors.CantAttachTypeAnnotations(attributes, s.owner, s.name, ex.getDetailValue())); 2364 } finally { 2365 log.useSource(prev); 2366 } 2367 } 2368 } 2369 2370 private static class TypeAnnotationSymbolVisitor 2371 extends Types.DefaultSymbolVisitor<Void, Void> { 2372 2373 private final List<Attribute.TypeCompound> attributes; 2374 2375 private TypeAnnotationSymbolVisitor(List<Attribute.TypeCompound> attributes) { 2376 this.attributes = attributes; 2377 } 2378 2379 /** 2380 * A supertype_index value of 65535 specifies that the annotation appears on the superclass 2381 * in an extends clause of a class declaration, see JVMS 4.7.20.1 2382 */ 2383 public static final int SUPERCLASS_INDEX = 65535; 2384 2385 @Override 2386 public Void visitClassSymbol(Symbol.ClassSymbol s, Void unused) { 2387 ClassType t = (ClassType) s.type; 2388 int i = 0; 2389 ListBuffer<Type> interfaces = new ListBuffer<>(); 2390 for (Type itf : t.interfaces_field) { 2391 interfaces.add(addTypeAnnotations(itf, classExtends(i++))); 2392 } 2393 t.interfaces_field = interfaces.toList(); 2394 t.supertype_field = addTypeAnnotations(t.supertype_field, classExtends(SUPERCLASS_INDEX)); 2395 if (t.typarams_field != null) { 2396 t.typarams_field = 2397 rewriteTypeParameters( 2398 t.typarams_field, TargetType.CLASS_TYPE_PARAMETER_BOUND); 2399 } 2400 return null; 2401 } 2402 2403 @Override 2404 public Void visitMethodSymbol(Symbol.MethodSymbol s, Void unused) { 2405 Type t = s.type; 2406 if (t.hasTag(TypeTag.FORALL)) { 2407 Type.ForAll fa = (Type.ForAll) t; 2408 fa.tvars = rewriteTypeParameters(fa.tvars, TargetType.METHOD_TYPE_PARAMETER_BOUND); 2409 t = fa.qtype; 2410 } 2411 MethodType mt = (MethodType) t; 2412 ListBuffer<Type> argtypes = new ListBuffer<>(); 2413 int i = 0; 2414 for (Symbol.VarSymbol param : s.params) { 2415 param.type = addTypeAnnotations(param.type, methodFormalParameter(i++)); 2416 argtypes.add(param.type); 2417 } 2418 mt.argtypes = argtypes.toList(); 2419 ListBuffer<Type> thrown = new ListBuffer<>(); 2420 i = 0; 2421 for (Type thrownType : mt.thrown) { 2422 thrown.add(addTypeAnnotations(thrownType, thrownType(i++))); 2423 } 2424 mt.thrown = thrown.toList(); 2425 /* possible information loss if the type of the method is void then we can't add type 2426 * annotations to it 2427 */ 2428 if (!mt.restype.hasTag(TypeTag.VOID)) { 2429 mt.restype = addTypeAnnotations(mt.restype, TargetType.METHOD_RETURN); 2430 } 2431 2432 Type recvtype = mt.recvtype != null ? mt.recvtype : s.implicitReceiverType(); 2433 if (recvtype != null) { 2434 Type annotated = addTypeAnnotations(recvtype, TargetType.METHOD_RECEIVER); 2435 if (annotated != recvtype) { 2436 mt.recvtype = annotated; 2437 } 2438 } 2439 return null; 2440 } 2441 2442 @Override 2443 public Void visitVarSymbol(Symbol.VarSymbol s, Void unused) { 2444 s.type = addTypeAnnotations(s.type, TargetType.FIELD); 2445 return null; 2446 } 2447 2448 @Override 2449 public Void visitSymbol(Symbol s, Void unused) { 2450 return null; 2451 } 2452 2453 private List<Type> rewriteTypeParameters(List<Type> tvars, TargetType boundType) { 2454 ListBuffer<Type> tvarbuf = new ListBuffer<>(); 2455 int typeVariableIndex = 0; 2456 for (Type tvar : tvars) { 2457 Type bound = tvar.getUpperBound(); 2458 if (bound.isCompound()) { 2459 ClassType ct = (ClassType) bound; 2460 int boundIndex = 0; 2461 if (ct.supertype_field != null) { 2462 ct.supertype_field = 2463 addTypeAnnotations( 2464 ct.supertype_field, 2465 typeParameterBound( 2466 boundType, typeVariableIndex, boundIndex++)); 2467 } 2468 ListBuffer<Type> itfbuf = new ListBuffer<>(); 2469 for (Type itf : ct.interfaces_field) { 2470 itfbuf.add( 2471 addTypeAnnotations( 2472 itf, 2473 typeParameterBound( 2474 boundType, typeVariableIndex, boundIndex++))); 2475 } 2476 ct.interfaces_field = itfbuf.toList(); 2477 } else { 2478 bound = 2479 addTypeAnnotations( 2480 bound, 2481 typeParameterBound( 2482 boundType, 2483 typeVariableIndex, 2484 bound.isInterface() ? 1 : 0)); 2485 } 2486 ((TypeVar) tvar).setUpperBound(bound); 2487 tvarbuf.add(tvar); 2488 typeVariableIndex++; 2489 } 2490 return tvarbuf.toList(); 2491 } 2492 2493 private Type addTypeAnnotations(Type type, TargetType targetType) { 2494 return addTypeAnnotations(type, pos -> pos.type == targetType); 2495 } 2496 2497 private Type addTypeAnnotations(Type type, Predicate<TypeAnnotationPosition> filter) { 2498 Assert.checkNonNull(type); 2499 2500 // Find type annotations that match the given target type 2501 ListBuffer<Attribute.TypeCompound> filtered = new ListBuffer<>(); 2502 for (Attribute.TypeCompound attribute : this.attributes) { 2503 if (filter.test(attribute.position)) { 2504 filtered.add(attribute); 2505 } 2506 } 2507 if (filtered.isEmpty()) { 2508 return type; 2509 } 2510 2511 // Group the matching annotations by their type path. Each group of annotations will be 2512 // added to a type at that location. 2513 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>> 2514 attributesByPath = new HashMap<>(); 2515 for (Attribute.TypeCompound attribute : filtered.toList()) { 2516 attributesByPath 2517 .computeIfAbsent(attribute.position.location, k -> new ListBuffer<>()) 2518 .add(attribute); 2519 } 2520 2521 // Rewrite the type and add the annotations 2522 type = new TypeAnnotationStructuralTypeMapping(attributesByPath).visit(type, List.nil()); 2523 2524 return type; 2525 } 2526 2527 private static Predicate<TypeAnnotationPosition> typeParameterBound( 2528 TargetType targetType, int parameterIndex, int boundIndex) { 2529 return pos -> 2530 pos.type == targetType 2531 && pos.parameter_index == parameterIndex 2532 && pos.bound_index == boundIndex; 2533 } 2534 2535 private static Predicate<TypeAnnotationPosition> methodFormalParameter(int index) { 2536 return pos -> 2537 pos.type == TargetType.METHOD_FORMAL_PARAMETER && pos.parameter_index == index; 2538 } 2539 2540 private static Predicate<TypeAnnotationPosition> thrownType(int index) { 2541 return pos -> pos.type == TargetType.THROWS && pos.type_index == index; 2542 } 2543 2544 private static Predicate<TypeAnnotationPosition> classExtends(int index) { 2545 return pos -> pos.type == TargetType.CLASS_EXTENDS && pos.type_index == index; 2546 } 2547 } 2548 2549 /** 2550 * A type mapping that rewrites the type to include type annotations. 2551 * 2552 * <p>This logic is similar to {@link Type.StructuralTypeMapping}, but also tracks the path to 2553 * the contained types being rewritten, and so cannot easily share the existing logic. 2554 */ 2555 private static final class TypeAnnotationStructuralTypeMapping 2556 extends Types.TypeMapping<List<TypeAnnotationPosition.TypePathEntry>> { 2557 2558 private final Map<List<TypeAnnotationPosition.TypePathEntry>, 2559 ListBuffer<Attribute.TypeCompound>> attributesByPath; 2560 2561 private TypeAnnotationStructuralTypeMapping( 2562 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>> 2563 attributesByPath) { 2564 this.attributesByPath = attributesByPath; 2565 } 2566 2567 2568 @Override 2569 public Type visitClassType(ClassType t, List<TypeAnnotationPosition.TypePathEntry> path) { 2570 // As described in JVMS 4.7.20.2, type annotations on nested types are located with 2571 // 'left-to-right' steps starting on 'the outermost part of the type for which a type 2572 // annotation is admissible'. So the current path represents the outermost containing 2573 // type of the type being visited, and we add type path steps for every contained nested 2574 // type. 2575 Type outer = t.getEnclosingType(); 2576 Type outer1 = outer != Type.noType ? visit(outer, path) : outer; 2577 for (Type curr = t.getEnclosingType(); 2578 curr != Type.noType; 2579 curr = curr.getEnclosingType()) { 2580 path = path.append(TypeAnnotationPosition.TypePathEntry.INNER_TYPE); 2581 } 2582 List<Type> typarams = t.getTypeArguments(); 2583 List<Type> typarams1 = rewriteTypeParams(path, typarams); 2584 if (outer1 != outer || typarams != typarams1) { 2585 t = new ClassType(outer1, typarams1, t.tsym, t.getMetadata()); 2586 } 2587 return reannotate(t, path); 2588 } 2589 2590 private List<Type> rewriteTypeParams( 2591 List<TypeAnnotationPosition.TypePathEntry> path, List<Type> typarams) { 2592 var i = IntStream.iterate(0, x -> x + 1).iterator(); 2593 return typarams.map(typaram -> visit(typaram, 2594 path.append(new TypeAnnotationPosition.TypePathEntry( 2595 TypeAnnotationPosition.TypePathEntryKind.TYPE_ARGUMENT, i.nextInt())))); 2596 } 2597 2598 @Override 2599 public Type visitWildcardType( 2600 WildcardType wt, List<TypeAnnotationPosition.TypePathEntry> path) { 2601 Type t = wt.type; 2602 if (t != null) { 2603 t = visit(t, path.append(TypeAnnotationPosition.TypePathEntry.WILDCARD)); 2604 } 2605 if (t != wt.type) { 2606 wt = new WildcardType(t, wt.kind, wt.tsym, wt.bound, wt.getMetadata()); 2607 } 2608 return reannotate(wt, path); 2609 } 2610 2611 @Override 2612 public Type visitArrayType(ArrayType t, List<TypeAnnotationPosition.TypePathEntry> path) { 2613 Type elemtype = t.elemtype; 2614 Type elemtype1 = 2615 visit(elemtype, path.append(TypeAnnotationPosition.TypePathEntry.ARRAY)); 2616 if (elemtype1 != elemtype) { 2617 t = new ArrayType(elemtype1, t.tsym, t.getMetadata()); 2618 } 2619 return reannotate(t, path); 2620 } 2621 2622 @Override 2623 public Type visitType(Type t, List<TypeAnnotationPosition.TypePathEntry> path) { 2624 return reannotate(t, path); 2625 } 2626 2627 Type reannotate(Type type, List<TypeAnnotationPosition.TypePathEntry> path) { 2628 List<Attribute.TypeCompound> attributes = attributesForPath(path); 2629 if (attributes.isEmpty()) { 2630 return type; 2631 } 2632 // Runtime-visible and -invisible annotations are completed separately, so if the same 2633 // type has annotations from both it will get annotated twice. 2634 TypeMetadata.Annotations existing = type.getMetadata(TypeMetadata.Annotations.class); 2635 if (existing != null) { 2636 existing.annotationBuffer().addAll(attributes); 2637 return type; 2638 } 2639 return type.annotatedType(attributes); 2640 } 2641 2642 List<Attribute.TypeCompound> attributesForPath( 2643 List<TypeAnnotationPosition.TypePathEntry> path) { 2644 ListBuffer<Attribute.TypeCompound> attributes = attributesByPath.remove(path); 2645 return attributes != null ? attributes.toList() : List.nil(); 2646 } 2647 } 2648 2649 /* ********************************************************************** 2650 * Reading Symbols 2651 ***********************************************************************/ 2652 2653 /** Read a field. 2654 */ 2655 VarSymbol readField() { 2656 char rawFlags = nextChar(); 2657 long flags = adjustFieldFlags(rawFlags); 2658 Name name = poolReader.getName(nextChar()); 2659 Type type = poolReader.getType(nextChar()); 2660 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2661 readMemberAttrs(v); 2662 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 || 2663 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1) 2664 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v); 2665 return v; 2666 } 2667 2668 /** Read a method. 2669 */ 2670 MethodSymbol readMethod() { 2671 char rawFlags = nextChar(); 2672 long flags = adjustMethodFlags(rawFlags); 2673 Name name = poolReader.getName(nextChar()); 2674 Type descriptorType = poolReader.getType(nextChar()); 2675 Type type = descriptorType; 2676 if (currentOwner.isInterface() && 2677 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2678 if (majorVersion > Version.V52.major || 2679 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 2680 if ((flags & (STATIC | PRIVATE)) == 0) { 2681 currentOwner.flags_field |= DEFAULT; 2682 flags |= DEFAULT | ABSTRACT; 2683 } 2684 } else { 2685 //protect against ill-formed classfiles 2686 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2687 Integer.toString(majorVersion), 2688 Integer.toString(minorVersion)); 2689 } 2690 } 2691 validateMethodType(name, type); 2692 boolean forceLocal = false; 2693 if (name == names.init && currentOwner.hasOuterInstance()) { 2694 // Sometimes anonymous classes don't have an outer 2695 // instance, however, there is no reliable way to tell so 2696 // we never strip this$n 2697 // ditto for local classes. Local classes that have an enclosing method set 2698 // won't pass the "hasOuterInstance" check above, but those that don't have an 2699 // enclosing method (i.e. from initializers) will pass that check. 2700 boolean local = forceLocal = 2701 !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE); 2702 if (!currentOwner.name.isEmpty() && !local) 2703 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2704 type.getReturnType(), 2705 type.getThrownTypes(), 2706 syms.methodClass); 2707 } 2708 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2709 if (types.isSignaturePolymorphic(m)) { 2710 m.flags_field |= SIGNATURE_POLYMORPHIC; 2711 } 2712 if (saveParameterNames) 2713 initParameterNames(m); 2714 Symbol prevOwner = currentOwner; 2715 currentOwner = m; 2716 try { 2717 readMemberAttrs(m); 2718 } finally { 2719 currentOwner = prevOwner; 2720 } 2721 validateMethodType(name, m.type); 2722 adjustParameterAnnotations(m, descriptorType, forceLocal); 2723 setParameters(m, type); 2724 2725 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1) 2726 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m); 2727 if ((flags & VARARGS) != 0) { 2728 final Type last = type.getParameterTypes().last(); 2729 if (last == null || !last.hasTag(ARRAY)) { 2730 m.flags_field &= ~VARARGS; 2731 throw badClassFile("malformed.vararg.method", m); 2732 } 2733 } 2734 2735 return m; 2736 } 2737 2738 void validateMethodType(Name name, Type t) { 2739 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) || 2740 (name == names.init && !t.getReturnType().hasTag(TypeTag.VOID))) { 2741 throw badClassFile("method.descriptor.invalid", name); 2742 } 2743 } 2744 2745 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2746 if (args.isEmpty()) { 2747 return args; 2748 } 2749 boolean isVarargs = (flags & VARARGS) != 0; 2750 if (isVarargs) { 2751 Type varargsElem = args.last(); 2752 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2753 for (Type t : args) { 2754 adjustedArgs.append(t != varargsElem ? 2755 t : 2756 ((ArrayType)t).makeVarargs()); 2757 } 2758 args = adjustedArgs.toList(); 2759 } 2760 return args.tail; 2761 } 2762 2763 /** 2764 * Init the parameter names array. 2765 * Parameter names are currently inferred from the names in the 2766 * LocalVariableTable attributes of a Code attribute. 2767 * (Note: this means parameter names are currently not available for 2768 * methods without a Code attribute.) 2769 * This method initializes an array in which to store the name indexes 2770 * of parameter names found in LocalVariableTable attributes. It is 2771 * slightly supersized to allow for additional slots with a start_pc of 0. 2772 */ 2773 void initParameterNames(MethodSymbol sym) { 2774 // make allowance for synthetic parameters. 2775 final int excessSlots = 4; 2776 int expectedParameterSlots = 2777 Code.width(sym.type.getParameterTypes()) + excessSlots; 2778 if (parameterNameIndicesLvt == null 2779 || parameterNameIndicesLvt.length < expectedParameterSlots) { 2780 parameterNameIndicesLvt = new int[expectedParameterSlots]; 2781 } else 2782 Arrays.fill(parameterNameIndicesLvt, 0); 2783 } 2784 2785 /** 2786 * Set the parameters for a method symbol, including any names and 2787 * annotations that were read. 2788 * 2789 * <p>The type of the symbol may have changed while reading the 2790 * method attributes (see the Signature attribute). This may be 2791 * because of generic information or because anonymous synthetic 2792 * parameters were added. The original type (as read from the 2793 * method descriptor) is used to help guess the existence of 2794 * anonymous synthetic parameters. 2795 */ 2796 void setParameters(MethodSymbol sym, Type jvmType) { 2797 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2798 // the code in readMethod may have skipped the first 2799 // parameter when setting up the MethodType. If so, we 2800 // make a corresponding allowance here for the position of 2801 // the first parameter. Note that this assumes the 2802 // skipped parameter has a width of 1 -- i.e. it is not 2803 // a double width type (long or double.) 2804 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2805 // Sometimes anonymous classes don't have an outer 2806 // instance, however, there is no reliable way to tell so 2807 // we never strip this$n 2808 if (!currentOwner.name.isEmpty()) 2809 firstParamLvt += 1; 2810 } 2811 2812 if (sym.type != jvmType) { 2813 // reading the method attributes has caused the 2814 // symbol's type to be changed. (i.e. the Signature 2815 // attribute.) This may happen if there are hidden 2816 // (synthetic) parameters in the descriptor, but not 2817 // in the Signature. The position of these hidden 2818 // parameters is unspecified; for now, assume they are 2819 // at the beginning, and so skip over them. The 2820 // primary case for this is two hidden parameters 2821 // passed into Enum constructors. 2822 int skip = Code.width(jvmType.getParameterTypes()) 2823 - Code.width(sym.type.getParameterTypes()); 2824 firstParamLvt += skip; 2825 } 2826 Set<Name> paramNames = new HashSet<>(); 2827 ListBuffer<VarSymbol> params = new ListBuffer<>(); 2828 // we maintain two index pointers, one for the LocalVariableTable attribute 2829 // and the other for the MethodParameters attribute. 2830 // This is needed as the MethodParameters attribute may contain 2831 // name_index = 0 in which case we want to fall back to the LocalVariableTable. 2832 // In such case, we still want to read the flags from the MethodParameters with that index. 2833 int nameIndexLvt = firstParamLvt; 2834 int nameIndexMp = 0; 2835 int annotationIndex = 0; 2836 for (Type t: sym.type.getParameterTypes()) { 2837 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames); 2838 params.append(param); 2839 if (parameterAnnotations != null) { 2840 ParameterAnnotations annotations = parameterAnnotations[annotationIndex]; 2841 if (annotations != null && annotations.proxies != null 2842 && !annotations.proxies.isEmpty()) { 2843 annotate.normal(new AnnotationCompleter(param, annotations.proxies)); 2844 } 2845 } 2846 nameIndexLvt += Code.width(t); 2847 nameIndexMp++; 2848 annotationIndex++; 2849 } 2850 Assert.check(parameterAnnotations == null || 2851 parameterAnnotations.length == annotationIndex); 2852 Assert.checkNull(sym.params); 2853 sym.params = params.toList(); 2854 parameterAnnotations = null; 2855 parameterNameIndicesLvt = null; 2856 parameterNameIndicesMp = null; 2857 allParameterAccessFlags = null; 2858 parameterAccessFlags = null; 2859 } 2860 2861 void adjustParameterAnnotations(MethodSymbol sym, Type methodDescriptor, 2862 boolean forceLocal) { 2863 if (parameterAnnotations == null) { 2864 return ; 2865 } 2866 2867 //the specification for Runtime(In)VisibleParameterAnnotations does not 2868 //enforce any mapping between the method parameters and the recorded 2869 //parameter annotation. Attempt a number of heuristics to adjust the 2870 //adjust parameterAnnotations to the percieved number of parameters: 2871 2872 int methodParameterCount = sym.type.getParameterTypes().size(); 2873 2874 if (methodParameterCount == parameterAnnotations.length) { 2875 //we've got exactly as many parameter annotations as are parameters 2876 //of the method (after considering a possible Signature attribute), 2877 //no need to do anything. the parameter creation code will use 2878 //the 1-1 mapping to restore the annotations: 2879 return ; 2880 } 2881 2882 if (allParameterAccessFlags != null) { 2883 //MethodParameters attribute present, use it: 2884 2885 //count the number of non-synthetic and non-mandatory parameters: 2886 int realParameters = 0; 2887 2888 for (int i = 0; i < allParameterAccessFlags.length; i++) { 2889 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) { 2890 realParameters++; 2891 } 2892 } 2893 2894 int methodDescriptorParameterCount = methodDescriptor.getParameterTypes().size(); 2895 2896 if (realParameters == parameterAnnotations.length && 2897 allParameterAccessFlags.length == methodDescriptorParameterCount) { 2898 //if we have parameter annotations for each non-synthetic/mandatory parameter, 2899 //and if Signature was not present, expand the parameterAnnotations to cover 2900 //all the method descriptor's parameters: 2901 if (sym.type == methodDescriptor) { 2902 ParameterAnnotations[] newParameterAnnotations = 2903 new ParameterAnnotations[methodParameterCount]; 2904 int srcIndex = 0; 2905 2906 for (int i = 0; i < methodParameterCount; i++) { 2907 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) { 2908 newParameterAnnotations[i] = parameterAnnotations[srcIndex++]; 2909 } 2910 } 2911 2912 parameterAnnotations = newParameterAnnotations; 2913 } else { 2914 dropParameterAnnotations(); 2915 } 2916 } else if (realParameters == methodParameterCount && 2917 methodDescriptorParameterCount == parameterAnnotations.length && 2918 allParameterAccessFlags.length == methodDescriptorParameterCount) { 2919 //if there are as many parameter annotations as parameters in 2920 //the method descriptor, and as many real parameters as parameters 2921 //in the method's type (after accounting for Signature), shrink 2922 //the parameterAnnotations to only cover the parameters from 2923 //the method's type: 2924 ParameterAnnotations[] newParameterAnnotations = 2925 new ParameterAnnotations[methodParameterCount]; 2926 int targetIndex = 0; 2927 2928 for (int i = 0; i < parameterAnnotations.length; i++) { 2929 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) { 2930 newParameterAnnotations[targetIndex++] = parameterAnnotations[i]; 2931 } 2932 } 2933 2934 parameterAnnotations = newParameterAnnotations; 2935 } else { 2936 dropParameterAnnotations(); 2937 } 2938 return ; 2939 } 2940 2941 if (!sym.isConstructor()) { 2942 //if the number of parameter annotations and the number of parameters 2943 //don't match, we don't have any heuristics to map one to the other 2944 //unless the method is a constructor: 2945 dropParameterAnnotations(); 2946 return ; 2947 } 2948 2949 if (sym.owner.isEnum()) { 2950 if (methodParameterCount == parameterAnnotations.length + 2 && 2951 sym.type == methodDescriptor) { 2952 //handle constructors of enum types without the Signature attribute - 2953 //there are the two synthetic parameters (name and ordinal) in the 2954 //constructor, but there may be only parameter annotations for the 2955 //real non-synthetic parameters: 2956 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[parameterAnnotations.length + 2]; 2957 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 2, parameterAnnotations.length); 2958 parameterAnnotations = newParameterAnnotations; 2959 return ; 2960 } 2961 } else if (sym.owner.isDirectlyOrIndirectlyLocal() || forceLocal) { 2962 //local class may capture the enclosing instance (as the first parameter), 2963 //and local variables (as trailing parameters) 2964 //if there are less parameter annotations than parameters, put the existing 2965 //ones starting with offset: 2966 if (methodParameterCount > parameterAnnotations.length && 2967 sym.type == methodDescriptor) { 2968 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[methodParameterCount]; 2969 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 1, parameterAnnotations.length); 2970 parameterAnnotations = newParameterAnnotations; 2971 return ; 2972 } 2973 } 2974 2975 //no heuristics worked, drop the annotations: 2976 dropParameterAnnotations(); 2977 } 2978 2979 private void dropParameterAnnotations() { 2980 parameterAnnotations = null; 2981 if (lintClassfile) { 2982 log.warning(LintCategory.CLASSFILE, Warnings.RuntimeInvisibleParameterAnnotations(currentClassFile)); 2983 } 2984 } 2985 /** 2986 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method. 2987 * Flags are optionally read from the MethodParameters attribute. 2988 * Names are optionally read from the MethodParameters attribute. If the constant pool index 2989 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute. 2990 * @param mpIndex the index of the parameter in the MethodParameters attribute 2991 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute 2992 */ 2993 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) { 2994 long flags = PARAMETER; 2995 Name argName; 2996 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length 2997 && parameterAccessFlags[mpIndex] != 0) { 2998 flags |= parameterAccessFlags[mpIndex]; 2999 } 3000 if (parameterNameIndicesMp != null && mpIndex < parameterNameIndicesMp.length 3001 // if name_index is 0, then we might still get a name from the LocalVariableTable 3002 && parameterNameIndicesMp[mpIndex] != 0) { 3003 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty); 3004 flags |= NAME_FILLED; 3005 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length 3006 && parameterNameIndicesLvt[lvtIndex] != 0) { 3007 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty); 3008 flags |= NAME_FILLED; 3009 } else { 3010 String prefix = "arg"; 3011 while (true) { 3012 argName = names.fromString(prefix + exclude.size()); 3013 if (!exclude.contains(argName)) 3014 break; 3015 prefix += "$"; 3016 } 3017 } 3018 exclude.add(argName); 3019 return new ParamSymbol(flags, argName, t, owner); 3020 } 3021 3022 /** 3023 * skip n bytes 3024 */ 3025 void skipBytes(int n) { 3026 bp = bp + n; 3027 } 3028 3029 /** Skip a field or method 3030 */ 3031 void skipMember() { 3032 bp = bp + 6; 3033 char ac = nextChar(); 3034 for (int i = 0; i < ac; i++) { 3035 bp = bp + 2; 3036 int attrLen = nextInt(); 3037 bp = bp + attrLen; 3038 } 3039 } 3040 3041 void skipInnerClasses() { 3042 int n = nextChar(); 3043 for (int i = 0; i < n; i++) { 3044 nextChar(); 3045 nextChar(); 3046 nextChar(); 3047 nextChar(); 3048 } 3049 } 3050 3051 /** Enter type variables of this classtype and all enclosing ones in 3052 * `typevars'. 3053 */ 3054 protected void enterTypevars(Symbol sym, Type t) { 3055 if (t.getEnclosingType() != null) { 3056 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) { 3057 enterTypevars(sym.owner, t.getEnclosingType()); 3058 } 3059 } else if (sym.kind == MTH && !sym.isStatic()) { 3060 enterTypevars(sym.owner, sym.owner.type); 3061 } 3062 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) { 3063 typevars.enter(xs.head.tsym); 3064 } 3065 } 3066 3067 protected ClassSymbol enterClass(Name name) { 3068 return syms.enterClass(currentModule, name); 3069 } 3070 3071 protected ClassSymbol enterClass(Name name, TypeSymbol owner) { 3072 return syms.enterClass(currentModule, name, owner); 3073 } 3074 3075 /** Read contents of a given class symbol `c'. Both external and internal 3076 * versions of an inner class are read. 3077 */ 3078 void readClass(ClassSymbol c) { 3079 ClassType ct = (ClassType)c.type; 3080 3081 // allocate scope for members 3082 c.members_field = WriteableScope.create(c); 3083 3084 // prepare type variable table 3085 typevars = typevars.dup(currentOwner); 3086 if (ct.getEnclosingType().hasTag(CLASS)) 3087 enterTypevars(c.owner, ct.getEnclosingType()); 3088 3089 // read flags, or skip if this is an inner class 3090 long f = nextChar(); 3091 long flags = adjustClassFlags(c, f); 3092 if ((flags & MODULE) == 0) { 3093 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags; 3094 // read own class name and check that it matches 3095 currentModule = c.packge().modle; 3096 ClassSymbol self = poolReader.getClass(nextChar()); 3097 if (c != self) { 3098 throw badClassFile("class.file.wrong.class", 3099 self.flatname); 3100 } 3101 } else { 3102 if (majorVersion < Version.V53.major) { 3103 throw badClassFile("anachronistic.module.info", 3104 Integer.toString(majorVersion), 3105 Integer.toString(minorVersion)); 3106 } 3107 c.flags_field = flags; 3108 if (c.owner.kind != MDL) { 3109 throw badClassFile("module.info.definition.expected"); 3110 } 3111 currentModule = (ModuleSymbol) c.owner; 3112 int this_class = nextChar(); 3113 // temp, no check on this_class 3114 } 3115 3116 // class attributes must be read before class 3117 // skip ahead to read class attributes 3118 int startbp = bp; 3119 nextChar(); 3120 char interfaceCount = nextChar(); 3121 bp += interfaceCount * 2; 3122 char fieldCount = nextChar(); 3123 for (int i = 0; i < fieldCount; i++) skipMember(); 3124 char methodCount = nextChar(); 3125 for (int i = 0; i < methodCount; i++) skipMember(); 3126 readClassAttrs(c); 3127 3128 if (!c.getPermittedSubclasses().isEmpty()) { 3129 c.flags_field |= SEALED; 3130 } 3131 3132 // reset and read rest of classinfo 3133 bp = startbp; 3134 int n = nextChar(); 3135 if ((flags & MODULE) != 0 && n > 0) { 3136 throw badClassFile("module.info.invalid.super.class"); 3137 } 3138 if (ct.supertype_field == null) 3139 ct.supertype_field = 3140 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType); 3141 n = nextChar(); 3142 List<Type> is = List.nil(); 3143 for (int i = 0; i < n; i++) { 3144 Type _inter = poolReader.getClass(nextChar()).erasure(types); 3145 is = is.prepend(_inter); 3146 } 3147 if (ct.interfaces_field == null) 3148 ct.interfaces_field = is.reverse(); 3149 3150 Assert.check(fieldCount == nextChar()); 3151 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 3152 Assert.check(methodCount == nextChar()); 3153 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 3154 if (c.isRecord()) { 3155 for (RecordComponent rc: c.getRecordComponents()) { 3156 rc.accessor = lookupMethod(c, rc.name, List.nil()); 3157 } 3158 } 3159 typevars = typevars.leave(); 3160 } 3161 3162 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) { 3163 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) { 3164 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) { 3165 return (MethodSymbol) s; 3166 } 3167 } 3168 return null; 3169 } 3170 3171 /** Read inner class info. For each inner/outer pair allocate a 3172 * member class. 3173 */ 3174 void readInnerClasses(ClassSymbol c) { 3175 int n = nextChar(); 3176 for (int i = 0; i < n; i++) { 3177 nextChar(); // skip inner class symbol 3178 int outerIdx = nextChar(); 3179 int nameIdx = nextChar(); 3180 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null); 3181 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty); 3182 if (name == null) name = names.empty; 3183 long flags = adjustClassFlags(c, nextChar()); 3184 if (outer != null) { // we have a member class 3185 if (name == names.empty) 3186 name = names.one; 3187 ClassSymbol member = enterClass(name, outer); 3188 if ((flags & STATIC) == 0) { 3189 ((ClassType)member.type).setEnclosingType(outer.type); 3190 if (member.erasure_field != null) 3191 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 3192 } 3193 if (c == outer && member.owner == c) { 3194 member.flags_field = flags; 3195 enterMember(c, member); 3196 } 3197 } 3198 } 3199 } 3200 3201 /** Read a class definition from the bytes in buf. 3202 */ 3203 private void readClassBuffer(ClassSymbol c) throws IOException { 3204 int magic = nextInt(); 3205 if (magic != JAVA_MAGIC) 3206 throw badClassFile("illegal.start.of.class.file"); 3207 3208 minorVersion = nextChar(); 3209 majorVersion = nextChar(); 3210 int maxMajor = Version.MAX().major; 3211 int maxMinor = Version.MAX().minor; 3212 boolean previewClassFile = 3213 minorVersion == ClassFile.PREVIEW_MINOR_VERSION; 3214 if (majorVersion > maxMajor || 3215 majorVersion * 1000 + minorVersion < 3216 Version.MIN().major * 1000 + Version.MIN().minor) { 3217 if (majorVersion == (maxMajor + 1) && !previewClassFile) 3218 log.warning(Warnings.BigMajorVersion(currentClassFile, 3219 majorVersion, 3220 maxMajor)); 3221 else 3222 throw badClassFile("wrong.version", 3223 Integer.toString(majorVersion), 3224 Integer.toString(minorVersion), 3225 Integer.toString(maxMajor), 3226 Integer.toString(maxMinor)); 3227 } 3228 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT; 3229 3230 if (previewClassFile) { 3231 if (!preview.isEnabled()) { 3232 log.error(preview.disabledError(currentClassFile, majorVersion)); 3233 } else { 3234 preview.warnPreview(c.classfile, majorVersion); 3235 } 3236 } 3237 3238 poolReader = new PoolReader(this, names, syms); 3239 bp = poolReader.readPool(buf, bp); 3240 if (signatureBuffer.length < bp) { 3241 int ns = Integer.highestOneBit(bp) << 1; 3242 signatureBuffer = new byte[ns]; 3243 } 3244 readClass(c); 3245 } 3246 3247 public void readClassFile(ClassSymbol c) { 3248 currentOwner = c; 3249 currentClassFile = c.classfile; 3250 warnedAttrs.clear(); 3251 filling = true; 3252 target = null; 3253 repeatable = null; 3254 try { 3255 bp = 0; 3256 buf.reset(); 3257 try (InputStream input = c.classfile.openInputStream()) { 3258 buf.appendStream(input); 3259 } 3260 readClassBuffer(c); 3261 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 3262 List<Type> missing = missingTypeVariables; 3263 List<Type> found = foundTypeVariables; 3264 missingTypeVariables = List.nil(); 3265 foundTypeVariables = List.nil(); 3266 interimUses = List.nil(); 3267 interimProvides = List.nil(); 3268 filling = false; 3269 ClassType ct = (ClassType)currentOwner.type; 3270 ct.supertype_field = 3271 types.subst(ct.supertype_field, missing, found); 3272 ct.interfaces_field = 3273 types.subst(ct.interfaces_field, missing, found); 3274 ct.typarams_field = 3275 types.substBounds(ct.typarams_field, missing, found); 3276 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) { 3277 types.head.tsym.type = types.head; 3278 } 3279 } else if (missingTypeVariables.isEmpty() != 3280 foundTypeVariables.isEmpty()) { 3281 Name name = missingTypeVariables.head.tsym.name; 3282 throw badClassFile("undecl.type.var", name); 3283 } 3284 3285 if ((c.flags_field & Flags.ANNOTATION) != 0) { 3286 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable))); 3287 } else { 3288 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType()); 3289 } 3290 3291 if (c == currentModule.module_info) { 3292 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) { 3293 Assert.check(currentModule.isCompleted()); 3294 currentModule.usesProvidesCompleter = 3295 new UsesProvidesCompleter(currentModule, interimUses, interimProvides); 3296 } else { 3297 currentModule.uses = List.nil(); 3298 currentModule.provides = List.nil(); 3299 } 3300 } 3301 } catch (IOException | ClosedFileSystemException ex) { 3302 throw badClassFile("unable.to.access.file", ex.toString()); 3303 } catch (ArrayIndexOutOfBoundsException ex) { 3304 throw badClassFile("bad.class.file", c.flatname); 3305 } finally { 3306 interimUses = List.nil(); 3307 interimProvides = List.nil(); 3308 missingTypeVariables = List.nil(); 3309 foundTypeVariables = List.nil(); 3310 filling = false; 3311 } 3312 } 3313 3314 /** We can only read a single class file at a time; this 3315 * flag keeps track of when we are currently reading a class 3316 * file. 3317 */ 3318 public boolean filling = false; 3319 3320 /* ********************************************************************** 3321 * Adjusting flags 3322 ***********************************************************************/ 3323 3324 long adjustFieldFlags(long flags) { 3325 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION; 3326 if (allowValueClasses && previewClassFile && (flags & ACC_STRICT) != 0) { 3327 flags &= ~ACC_STRICT; 3328 flags |= STRICT; 3329 } 3330 return flags; 3331 } 3332 3333 long adjustMethodFlags(long flags) { 3334 if ((flags & ACC_BRIDGE) != 0) { 3335 flags &= ~ACC_BRIDGE; 3336 flags |= BRIDGE; 3337 } 3338 if ((flags & ACC_VARARGS) != 0) { 3339 flags &= ~ACC_VARARGS; 3340 flags |= VARARGS; 3341 } 3342 return flags; 3343 } 3344 3345 long adjustClassFlags(ClassSymbol c, long flags) { 3346 if ((flags & ACC_MODULE) != 0) { 3347 flags &= ~ACC_MODULE; 3348 flags |= MODULE; 3349 } 3350 if (((flags & ACC_IDENTITY) != 0 && !isMigratedValueClass(flags)) || (majorVersion < V67.major && (flags & INTERFACE) == 0)) { 3351 flags |= IDENTITY_TYPE; 3352 } else if (needsValueFlag(c, flags)) { 3353 flags |= VALUE_CLASS; 3354 flags &= ~IDENTITY_TYPE; 3355 } 3356 flags &= ~ACC_IDENTITY; // ACC_IDENTITY and SYNCHRONIZED bits overloaded 3357 return flags; 3358 } 3359 3360 private boolean needsValueFlag(Symbol c, long flags) { 3361 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION; 3362 if (allowValueClasses) { 3363 if (previewClassFile && majorVersion >= V67.major && (flags & INTERFACE) == 0 || 3364 majorVersion >= V67.major && isMigratedValueClass(flags)) { 3365 return true; 3366 } 3367 } 3368 return false; 3369 } 3370 3371 private boolean isMigratedValueClass(long flags) { 3372 return allowValueClasses && ((flags & MIGRATED_VALUE_CLASS) != 0); 3373 } 3374 3375 /** 3376 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 3377 * The attribute is only the last component of the original filename, so is unlikely 3378 * to be valid as is, so operations other than those to access the name throw 3379 * UnsupportedOperationException 3380 */ 3381 private static class SourceFileObject implements JavaFileObject { 3382 3383 /** The file's name. 3384 */ 3385 private final Name name; 3386 3387 public SourceFileObject(Name name) { 3388 this.name = name; 3389 } 3390 3391 @Override @DefinedBy(Api.COMPILER) 3392 public URI toUri() { 3393 try { 3394 return new URI(null, name.toString(), null); 3395 } catch (URISyntaxException e) { 3396 throw new PathFileObject.CannotCreateUriError(name.toString(), e); 3397 } 3398 } 3399 3400 @Override @DefinedBy(Api.COMPILER) 3401 public String getName() { 3402 return name.toString(); 3403 } 3404 3405 @Override @DefinedBy(Api.COMPILER) 3406 public JavaFileObject.Kind getKind() { 3407 return BaseFileManager.getKind(getName()); 3408 } 3409 3410 @Override @DefinedBy(Api.COMPILER) 3411 public InputStream openInputStream() { 3412 throw new UnsupportedOperationException(); 3413 } 3414 3415 @Override @DefinedBy(Api.COMPILER) 3416 public OutputStream openOutputStream() { 3417 throw new UnsupportedOperationException(); 3418 } 3419 3420 @Override @DefinedBy(Api.COMPILER) 3421 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 3422 throw new UnsupportedOperationException(); 3423 } 3424 3425 @Override @DefinedBy(Api.COMPILER) 3426 public Reader openReader(boolean ignoreEncodingErrors) { 3427 throw new UnsupportedOperationException(); 3428 } 3429 3430 @Override @DefinedBy(Api.COMPILER) 3431 public Writer openWriter() { 3432 throw new UnsupportedOperationException(); 3433 } 3434 3435 @Override @DefinedBy(Api.COMPILER) 3436 public long getLastModified() { 3437 throw new UnsupportedOperationException(); 3438 } 3439 3440 @Override @DefinedBy(Api.COMPILER) 3441 public boolean delete() { 3442 throw new UnsupportedOperationException(); 3443 } 3444 3445 @Override @DefinedBy(Api.COMPILER) 3446 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 3447 return true; // fail-safe mode 3448 } 3449 3450 @Override @DefinedBy(Api.COMPILER) 3451 public NestingKind getNestingKind() { 3452 return null; 3453 } 3454 3455 @Override @DefinedBy(Api.COMPILER) 3456 public Modifier getAccessLevel() { 3457 return null; 3458 } 3459 3460 /** 3461 * Check if two file objects are equal. 3462 * SourceFileObjects are just placeholder objects for the value of a 3463 * SourceFile attribute, and do not directly represent specific files. 3464 * Two SourceFileObjects are equal if their names are equal. 3465 */ 3466 @Override 3467 public boolean equals(Object other) { 3468 if (this == other) 3469 return true; 3470 return (other instanceof SourceFileObject sourceFileObject) 3471 && name.equals(sourceFileObject.name); 3472 } 3473 3474 @Override 3475 public int hashCode() { 3476 return name.hashCode(); 3477 } 3478 } 3479 3480 private class CompleterDeproxy implements AnnotationTypeCompleter { 3481 ClassSymbol proxyOn; 3482 CompoundAnnotationProxy target; 3483 CompoundAnnotationProxy repeatable; 3484 3485 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target, 3486 CompoundAnnotationProxy repeatable) 3487 { 3488 this.proxyOn = c; 3489 this.target = target; 3490 this.repeatable = repeatable; 3491 } 3492 3493 @Override 3494 public void complete(ClassSymbol sym) { 3495 Assert.check(proxyOn == sym); 3496 Attribute.Compound theTarget = null, theRepeatable = null; 3497 AnnotationDeproxy deproxy; 3498 3499 try { 3500 if (target != null) { 3501 deproxy = new AnnotationDeproxy(proxyOn); 3502 theTarget = deproxy.deproxyCompound(target); 3503 } 3504 3505 if (repeatable != null) { 3506 deproxy = new AnnotationDeproxy(proxyOn); 3507 theRepeatable = deproxy.deproxyCompound(repeatable); 3508 } 3509 } catch (Exception e) { 3510 throw new CompletionFailure(sym, 3511 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())), 3512 dcfh); 3513 } 3514 3515 sym.getAnnotationTypeMetadata().setTarget(theTarget); 3516 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable); 3517 } 3518 } 3519 3520 private class ProxyType extends Type { 3521 3522 private final Name name; 3523 3524 public ProxyType(int index) { 3525 super(syms.noSymbol, List.nil()); 3526 this.name = poolReader.getName(index); 3527 } 3528 3529 @Override 3530 public TypeTag getTag() { 3531 return TypeTag.NONE; 3532 } 3533 3534 public Type resolve() { 3535 return name.map(ClassReader.this::sigToType); 3536 } 3537 3538 @Override @DefinedBy(Api.LANGUAGE_MODEL) 3539 public String toString() { 3540 return "<ProxyType>"; 3541 } 3542 3543 } 3544 3545 private static final class InterimUsesDirective { 3546 public final Name service; 3547 3548 public InterimUsesDirective(Name service) { 3549 this.service = service; 3550 } 3551 3552 } 3553 3554 private static final class InterimProvidesDirective { 3555 public final Name service; 3556 public final List<Name> impls; 3557 3558 public InterimProvidesDirective(Name service, List<Name> impls) { 3559 this.service = service; 3560 this.impls = impls; 3561 } 3562 3563 } 3564 3565 private final class UsesProvidesCompleter implements Completer { 3566 private final ModuleSymbol currentModule; 3567 private final List<InterimUsesDirective> interimUsesCopy; 3568 private final List<InterimProvidesDirective> interimProvidesCopy; 3569 3570 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) { 3571 this.currentModule = currentModule; 3572 this.interimUsesCopy = interimUsesCopy; 3573 this.interimProvidesCopy = interimProvidesCopy; 3574 } 3575 3576 @Override 3577 public void complete(Symbol sym) throws CompletionFailure { 3578 ListBuffer<Directive> directives = new ListBuffer<>(); 3579 directives.addAll(currentModule.directives); 3580 ListBuffer<UsesDirective> uses = new ListBuffer<>(); 3581 for (InterimUsesDirective interim : interimUsesCopy) { 3582 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service)); 3583 uses.add(d); 3584 directives.add(d); 3585 } 3586 currentModule.uses = uses.toList(); 3587 ListBuffer<ProvidesDirective> provides = new ListBuffer<>(); 3588 for (InterimProvidesDirective interim : interimProvidesCopy) { 3589 ListBuffer<ClassSymbol> impls = new ListBuffer<>(); 3590 for (Name impl : interim.impls) { 3591 impls.append(syms.enterClass(currentModule, impl)); 3592 } 3593 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service), 3594 impls.toList()); 3595 provides.add(d); 3596 directives.add(d); 3597 } 3598 currentModule.provides = provides.toList(); 3599 currentModule.directives = directives.toList(); 3600 } 3601 } 3602 }