1/* 2 * Copyright (c) 1999, 2017, 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 26package com.sun.tools.javac.jvm; 27 28import java.io.*; 29import java.net.URI; 30import java.net.URISyntaxException; 31import java.nio.CharBuffer; 32import java.nio.file.ClosedFileSystemException; 33import java.util.Arrays; 34import java.util.EnumSet; 35import java.util.HashMap; 36import java.util.HashSet; 37import java.util.Map; 38import java.util.Set; 39 40import javax.lang.model.element.Modifier; 41import javax.lang.model.element.NestingKind; 42import javax.tools.JavaFileManager; 43import javax.tools.JavaFileObject; 44 45import com.sun.tools.javac.comp.Annotate; 46import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter; 47import com.sun.tools.javac.code.*; 48import com.sun.tools.javac.code.Directive.*; 49import com.sun.tools.javac.code.Lint.LintCategory; 50import com.sun.tools.javac.code.Scope.WriteableScope; 51import com.sun.tools.javac.code.Symbol.*; 52import com.sun.tools.javac.code.Symtab; 53import com.sun.tools.javac.code.Type.*; 54import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata; 55import com.sun.tools.javac.file.BaseFileManager; 56import com.sun.tools.javac.file.PathFileObject; 57import com.sun.tools.javac.jvm.ClassFile.NameAndType; 58import com.sun.tools.javac.jvm.ClassFile.Version; 59import com.sun.tools.javac.main.Option; 60import com.sun.tools.javac.resources.CompilerProperties.Fragments; 61import com.sun.tools.javac.resources.CompilerProperties.Warnings; 62import com.sun.tools.javac.util.*; 63import com.sun.tools.javac.util.DefinedBy.Api; 64import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 65 66import static com.sun.tools.javac.code.Flags.*; 67import static com.sun.tools.javac.code.Kinds.Kind.*; 68 69import com.sun.tools.javac.code.Scope.LookupKind; 70 71import static com.sun.tools.javac.code.TypeTag.ARRAY; 72import static com.sun.tools.javac.code.TypeTag.CLASS; 73import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 74import static com.sun.tools.javac.jvm.ClassFile.*; 75import static com.sun.tools.javac.jvm.ClassFile.Version.*; 76 77import static com.sun.tools.javac.main.Option.PARAMETERS; 78 79/** This class provides operations to read a classfile into an internal 80 * representation. The internal representation is anchored in a 81 * ClassSymbol which contains in its scope symbol representations 82 * for all other definitions in the classfile. Top-level Classes themselves 83 * appear as members of the scopes of PackageSymbols. 84 * 85 * <p><b>This is NOT part of any supported API. 86 * If you write code that depends on this, you do so at your own risk. 87 * This code and its internal interfaces are subject to change or 88 * deletion without notice.</b> 89 */ 90public class ClassReader { 91 /** The context key for the class reader. */ 92 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 93 94 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 95 96 private final Annotate annotate; 97 98 /** Switch: verbose output. 99 */ 100 boolean verbose; 101 102 /** Switch: read constant pool and code sections. This switch is initially 103 * set to false but can be turned on from outside. 104 */ 105 public boolean readAllOfClassFile = false; 106 107 /** Switch: allow simplified varargs. 108 */ 109 boolean allowSimplifiedVarargs; 110 111 /** Switch: allow modules. 112 */ 113 boolean allowModules; 114 115 /** Lint option: warn about classfile issues 116 */ 117 boolean lintClassfile; 118 119 /** Switch: preserve parameter names from the variable table. 120 */ 121 public boolean saveParameterNames; 122 123 /** 124 * The currently selected profile. 125 */ 126 public final Profile profile; 127 128 /** The log to use for verbose output 129 */ 130 final Log log; 131 132 /** The symbol table. */ 133 Symtab syms; 134 135 Types types; 136 137 /** The name table. */ 138 final Names names; 139 140 /** Access to files 141 */ 142 private final JavaFileManager fileManager; 143 144 /** Factory for diagnostics 145 */ 146 JCDiagnostic.Factory diagFactory; 147 148 /** The current scope where type variables are entered. 149 */ 150 protected WriteableScope typevars; 151 152 private List<InterimUsesDirective> interimUses = List.nil(); 153 private List<InterimProvidesDirective> interimProvides = List.nil(); 154 155 /** The path name of the class file currently being read. 156 */ 157 protected JavaFileObject currentClassFile = null; 158 159 /** The class or method currently being read. 160 */ 161 protected Symbol currentOwner = null; 162 163 /** The module containing the class currently being read. 164 */ 165 protected ModuleSymbol currentModule = null; 166 167 /** The buffer containing the currently read class file. 168 */ 169 byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 170 171 /** The current input pointer. 172 */ 173 protected int bp; 174 175 /** The objects of the constant pool. 176 */ 177 Object[] poolObj; 178 179 /** For every constant pool entry, an index into buf where the 180 * defining section of the entry is found. 181 */ 182 int[] poolIdx; 183 184 /** The major version number of the class file being read. */ 185 int majorVersion; 186 /** The minor version number of the class file being read. */ 187 int minorVersion; 188 189 /** A table to hold the constant pool indices for method parameter 190 * names, as given in LocalVariableTable attributes. 191 */ 192 int[] parameterNameIndices; 193 194 /** 195 * Whether or not any parameter names have been found. 196 */ 197 boolean haveParameterNameIndices; 198 199 /** Set this to false every time we start reading a method 200 * and are saving parameter names. Set it to true when we see 201 * MethodParameters, if it's set when we see a LocalVariableTable, 202 * then we ignore the parameter names from the LVT. 203 */ 204 boolean sawMethodParameters; 205 206 /** 207 * The set of attribute names for which warnings have been generated for the current class 208 */ 209 Set<Name> warnedAttrs = new HashSet<>(); 210 211 /** 212 * The prototype @Target Attribute.Compound if this class is an annotation annotated with 213 * @Target 214 */ 215 CompoundAnnotationProxy target; 216 217 /** 218 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with 219 * @Repeatable 220 */ 221 CompoundAnnotationProxy repeatable; 222 223 /** Get the ClassReader instance for this invocation. */ 224 public static ClassReader instance(Context context) { 225 ClassReader instance = context.get(classReaderKey); 226 if (instance == null) 227 instance = new ClassReader(context); 228 return instance; 229 } 230 231 /** Construct a new class reader. */ 232 protected ClassReader(Context context) { 233 context.put(classReaderKey, this); 234 annotate = Annotate.instance(context); 235 names = Names.instance(context); 236 syms = Symtab.instance(context); 237 types = Types.instance(context); 238 fileManager = context.get(JavaFileManager.class); 239 if (fileManager == null) 240 throw new AssertionError("FileManager initialization error"); 241 diagFactory = JCDiagnostic.Factory.instance(context); 242 243 log = Log.instance(context); 244 245 Options options = Options.instance(context); 246 verbose = options.isSet(Option.VERBOSE); 247 248 Source source = Source.instance(context); 249 allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 250 allowModules = source.allowModules(); 251 252 saveParameterNames = options.isSet(PARAMETERS); 253 254 profile = Profile.instance(context); 255 256 typevars = WriteableScope.create(syms.noSymbol); 257 258 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 259 260 initAttributeReaders(); 261 } 262 263 /** Add member to class unless it is synthetic. 264 */ 265 private void enterMember(ClassSymbol c, Symbol sym) { 266 // Synthetic members are not entered -- reason lost to history (optimization?). 267 // Lambda methods must be entered because they may have inner classes (which reference them) 268 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 269 c.members_field.enter(sym); 270 } 271 272/************************************************************************ 273 * Error Diagnoses 274 ***********************************************************************/ 275 276 public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 277 return new ClassFinder.BadClassFile ( 278 currentOwner.enclClass(), 279 currentClassFile, 280 diagFactory.fragment(key, args), 281 diagFactory); 282 } 283 284 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) { 285 return new ClassFinder.BadEnclosingMethodAttr ( 286 currentOwner.enclClass(), 287 currentClassFile, 288 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)), 289 diagFactory); 290 } 291 292/************************************************************************ 293 * Buffer Access 294 ***********************************************************************/ 295 296 /** Read a character. 297 */ 298 char nextChar() { 299 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 300 } 301 302 /** Read a byte. 303 */ 304 int nextByte() { 305 return buf[bp++] & 0xFF; 306 } 307 308 /** Read an integer. 309 */ 310 int nextInt() { 311 return 312 ((buf[bp++] & 0xFF) << 24) + 313 ((buf[bp++] & 0xFF) << 16) + 314 ((buf[bp++] & 0xFF) << 8) + 315 (buf[bp++] & 0xFF); 316 } 317 318 /** Extract a character at position bp from buf. 319 */ 320 char getChar(int bp) { 321 return 322 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 323 } 324 325 /** Extract an integer at position bp from buf. 326 */ 327 int getInt(int bp) { 328 return 329 ((buf[bp] & 0xFF) << 24) + 330 ((buf[bp+1] & 0xFF) << 16) + 331 ((buf[bp+2] & 0xFF) << 8) + 332 (buf[bp+3] & 0xFF); 333 } 334 335 336 /** Extract a long integer at position bp from buf. 337 */ 338 long getLong(int bp) { 339 DataInputStream bufin = 340 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 341 try { 342 return bufin.readLong(); 343 } catch (IOException e) { 344 throw new AssertionError(e); 345 } 346 } 347 348 /** Extract a float at position bp from buf. 349 */ 350 float getFloat(int bp) { 351 DataInputStream bufin = 352 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 353 try { 354 return bufin.readFloat(); 355 } catch (IOException e) { 356 throw new AssertionError(e); 357 } 358 } 359 360 /** Extract a double at position bp from buf. 361 */ 362 double getDouble(int bp) { 363 DataInputStream bufin = 364 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 365 try { 366 return bufin.readDouble(); 367 } catch (IOException e) { 368 throw new AssertionError(e); 369 } 370 } 371 372/************************************************************************ 373 * Constant Pool Access 374 ***********************************************************************/ 375 376 /** Index all constant pool entries, writing their start addresses into 377 * poolIdx. 378 */ 379 void indexPool() { 380 poolIdx = new int[nextChar()]; 381 poolObj = new Object[poolIdx.length]; 382 int i = 1; 383 while (i < poolIdx.length) { 384 poolIdx[i++] = bp; 385 byte tag = buf[bp++]; 386 switch (tag) { 387 case CONSTANT_Utf8: case CONSTANT_Unicode: { 388 int len = nextChar(); 389 bp = bp + len; 390 break; 391 } 392 case CONSTANT_Class: 393 case CONSTANT_String: 394 case CONSTANT_MethodType: 395 case CONSTANT_Module: 396 case CONSTANT_Package: 397 bp = bp + 2; 398 break; 399 case CONSTANT_MethodHandle: 400 bp = bp + 3; 401 break; 402 case CONSTANT_Fieldref: 403 case CONSTANT_Methodref: 404 case CONSTANT_InterfaceMethodref: 405 case CONSTANT_NameandType: 406 case CONSTANT_Integer: 407 case CONSTANT_Float: 408 case CONSTANT_InvokeDynamic: 409 bp = bp + 4; 410 break; 411 case CONSTANT_Long: 412 case CONSTANT_Double: 413 bp = bp + 8; 414 i++; 415 break; 416 default: 417 throw badClassFile("bad.const.pool.tag.at", 418 Byte.toString(tag), 419 Integer.toString(bp -1)); 420 } 421 } 422 } 423 424 /** Read constant pool entry at start address i, use pool as a cache. 425 */ 426 Object readPool(int i) { 427 Object result = poolObj[i]; 428 if (result != null) return result; 429 430 int index = poolIdx[i]; 431 if (index == 0) return null; 432 433 byte tag = buf[index]; 434 switch (tag) { 435 case CONSTANT_Utf8: 436 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 437 break; 438 case CONSTANT_Unicode: 439 throw badClassFile("unicode.str.not.supported"); 440 case CONSTANT_Class: 441 poolObj[i] = readClassOrType(getChar(index + 1)); 442 break; 443 case CONSTANT_String: 444 // FIXME: (footprint) do not use toString here 445 poolObj[i] = readName(getChar(index + 1)).toString(); 446 break; 447 case CONSTANT_Fieldref: { 448 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 449 NameAndType nt = readNameAndType(getChar(index + 3)); 450 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 451 break; 452 } 453 case CONSTANT_Methodref: 454 case CONSTANT_InterfaceMethodref: { 455 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 456 NameAndType nt = readNameAndType(getChar(index + 3)); 457 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 458 break; 459 } 460 case CONSTANT_NameandType: 461 poolObj[i] = new NameAndType( 462 readName(getChar(index + 1)), 463 readType(getChar(index + 3)), types); 464 break; 465 case CONSTANT_Integer: 466 poolObj[i] = getInt(index + 1); 467 break; 468 case CONSTANT_Float: 469 poolObj[i] = Float.valueOf(getFloat(index + 1)); 470 break; 471 case CONSTANT_Long: 472 poolObj[i] = Long.valueOf(getLong(index + 1)); 473 break; 474 case CONSTANT_Double: 475 poolObj[i] = Double.valueOf(getDouble(index + 1)); 476 break; 477 case CONSTANT_MethodHandle: 478 skipBytes(4); 479 break; 480 case CONSTANT_MethodType: 481 skipBytes(3); 482 break; 483 case CONSTANT_InvokeDynamic: 484 skipBytes(5); 485 break; 486 case CONSTANT_Module: 487 case CONSTANT_Package: 488 // this is temporary for now: treat as a simple reference to the underlying Utf8. 489 poolObj[i] = readName(getChar(index + 1)); 490 break; 491 default: 492 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 493 } 494 return poolObj[i]; 495 } 496 497 /** Read signature and convert to type. 498 */ 499 Type readType(int i) { 500 int index = poolIdx[i]; 501 return sigToType(buf, index + 3, getChar(index + 1)); 502 } 503 504 /** If name is an array type or class signature, return the 505 * corresponding type; otherwise return a ClassSymbol with given name. 506 */ 507 Object readClassOrType(int i) { 508 int index = poolIdx[i]; 509 int len = getChar(index + 1); 510 int start = index + 3; 511 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 512 // by the above assertion, the following test can be 513 // simplified to (buf[start] == '[') 514 return (buf[start] == '[' || buf[start + len - 1] == ';') 515 ? (Object)sigToType(buf, start, len) 516 : (Object)enterClass(names.fromUtf(internalize(buf, start, 517 len))); 518 } 519 520 /** Read signature and convert to type parameters. 521 */ 522 List<Type> readTypeParams(int i) { 523 int index = poolIdx[i]; 524 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 525 } 526 527 /** Read class entry. 528 */ 529 ClassSymbol readClassSymbol(int i) { 530 Object obj = readPool(i); 531 if (obj != null && !(obj instanceof ClassSymbol)) 532 throw badClassFile("bad.const.pool.entry", 533 currentClassFile.toString(), 534 "CONSTANT_Class_info", i); 535 return (ClassSymbol)obj; 536 } 537 538 Name readClassName(int i) { 539 int index = poolIdx[i]; 540 if (index == 0) return null; 541 byte tag = buf[index]; 542 if (tag != CONSTANT_Class) { 543 throw badClassFile("bad.const.pool.entry", 544 currentClassFile.toString(), 545 "CONSTANT_Class_info", i); 546 } 547 int nameIndex = poolIdx[getChar(index + 1)]; 548 int len = getChar(nameIndex + 1); 549 int start = nameIndex + 3; 550 if (buf[start] == '[' || buf[start + len - 1] == ';') 551 throw badClassFile("wrong class name"); //TODO: proper diagnostics 552 return names.fromUtf(internalize(buf, start, len)); 553 } 554 555 /** Read name. 556 */ 557 Name readName(int i) { 558 Object obj = readPool(i); 559 if (obj != null && !(obj instanceof Name)) 560 throw badClassFile("bad.const.pool.entry", 561 currentClassFile.toString(), 562 "CONSTANT_Utf8_info or CONSTANT_String_info", i); 563 return (Name)obj; 564 } 565 566 /** Read name and type. 567 */ 568 NameAndType readNameAndType(int i) { 569 Object obj = readPool(i); 570 if (obj != null && !(obj instanceof NameAndType)) 571 throw badClassFile("bad.const.pool.entry", 572 currentClassFile.toString(), 573 "CONSTANT_NameAndType_info", i); 574 return (NameAndType)obj; 575 } 576 577 /** Read the name of a module. 578 * The name is stored in a CONSTANT_Module entry, in 579 * JVMS 4.2 binary form (using ".", not "/") 580 */ 581 Name readModuleName(int i) { 582 return readName(i); 583 } 584 585 /** Read module_flags. 586 */ 587 Set<ModuleFlags> readModuleFlags(int flags) { 588 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class); 589 for (ModuleFlags f : ModuleFlags.values()) { 590 if ((flags & f.value) != 0) 591 set.add(f); 592 } 593 return set; 594 } 595 596 /** Read resolution_flags. 597 */ 598 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) { 599 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class); 600 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) { 601 if ((flags & f.value) != 0) 602 set.add(f); 603 } 604 return set; 605 } 606 607 /** Read exports_flags. 608 */ 609 Set<ExportsFlag> readExportsFlags(int flags) { 610 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class); 611 for (ExportsFlag f: ExportsFlag.values()) { 612 if ((flags & f.value) != 0) 613 set.add(f); 614 } 615 return set; 616 } 617 618 /** Read opens_flags. 619 */ 620 Set<OpensFlag> readOpensFlags(int flags) { 621 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class); 622 for (OpensFlag f: OpensFlag.values()) { 623 if ((flags & f.value) != 0) 624 set.add(f); 625 } 626 return set; 627 } 628 629 /** Read requires_flags. 630 */ 631 Set<RequiresFlag> readRequiresFlags(int flags) { 632 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class); 633 for (RequiresFlag f: RequiresFlag.values()) { 634 if ((flags & f.value) != 0) 635 set.add(f); 636 } 637 return set; 638 } 639 640/************************************************************************ 641 * Reading Types 642 ***********************************************************************/ 643 644 /** The unread portion of the currently read type is 645 * signature[sigp..siglimit-1]. 646 */ 647 byte[] signature; 648 int sigp; 649 int siglimit; 650 boolean sigEnterPhase = false; 651 652 /** Convert signature to type, where signature is a byte array segment. 653 */ 654 Type sigToType(byte[] sig, int offset, int len) { 655 signature = sig; 656 sigp = offset; 657 siglimit = offset + len; 658 return sigToType(); 659 } 660 661 /** Convert signature to type, where signature is implicit. 662 */ 663 Type sigToType() { 664 switch ((char) signature[sigp]) { 665 case 'T': 666 sigp++; 667 int start = sigp; 668 while (signature[sigp] != ';') sigp++; 669 sigp++; 670 return sigEnterPhase 671 ? Type.noType 672 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 673 case '+': { 674 sigp++; 675 Type t = sigToType(); 676 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 677 } 678 case '*': 679 sigp++; 680 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 681 syms.boundClass); 682 case '-': { 683 sigp++; 684 Type t = sigToType(); 685 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 686 } 687 case 'B': 688 sigp++; 689 return syms.byteType; 690 case 'C': 691 sigp++; 692 return syms.charType; 693 case 'D': 694 sigp++; 695 return syms.doubleType; 696 case 'F': 697 sigp++; 698 return syms.floatType; 699 case 'I': 700 sigp++; 701 return syms.intType; 702 case 'J': 703 sigp++; 704 return syms.longType; 705 case 'L': 706 { 707 // int oldsigp = sigp; 708 Type t = classSigToType(); 709 if (sigp < siglimit && signature[sigp] == '.') 710 throw badClassFile("deprecated inner class signature syntax " + 711 "(please recompile from source)"); 712 /* 713 System.err.println(" decoded " + 714 new String(signature, oldsigp, sigp-oldsigp) + 715 " => " + t + " outer " + t.outer()); 716 */ 717 return t; 718 } 719 case 'S': 720 sigp++; 721 return syms.shortType; 722 case 'V': 723 sigp++; 724 return syms.voidType; 725 case 'Z': 726 sigp++; 727 return syms.booleanType; 728 case '[': 729 sigp++; 730 return new ArrayType(sigToType(), syms.arrayClass); 731 case '(': 732 sigp++; 733 List<Type> argtypes = sigToTypes(')'); 734 Type restype = sigToType(); 735 List<Type> thrown = List.nil(); 736 while (signature[sigp] == '^') { 737 sigp++; 738 thrown = thrown.prepend(sigToType()); 739 } 740 // if there is a typevar in the throws clause we should state it. 741 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 742 if (l.head.hasTag(TYPEVAR)) { 743 l.head.tsym.flags_field |= THROWS; 744 } 745 } 746 return new MethodType(argtypes, 747 restype, 748 thrown.reverse(), 749 syms.methodClass); 750 case '<': 751 typevars = typevars.dup(currentOwner); 752 Type poly = new ForAll(sigToTypeParams(), sigToType()); 753 typevars = typevars.leave(); 754 return poly; 755 default: 756 throw badClassFile("bad.signature", 757 Convert.utf2string(signature, sigp, 10)); 758 } 759 } 760 761 byte[] signatureBuffer = new byte[0]; 762 int sbp = 0; 763 /** Convert class signature to type, where signature is implicit. 764 */ 765 Type classSigToType() { 766 if (signature[sigp] != 'L') 767 throw badClassFile("bad.class.signature", 768 Convert.utf2string(signature, sigp, 10)); 769 sigp++; 770 Type outer = Type.noType; 771 int startSbp = sbp; 772 773 while (true) { 774 final byte c = signature[sigp++]; 775 switch (c) { 776 777 case ';': { // end 778 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 779 startSbp, 780 sbp - startSbp)); 781 782 try { 783 return (outer == Type.noType) ? 784 t.erasure(types) : 785 new ClassType(outer, List.nil(), t); 786 } finally { 787 sbp = startSbp; 788 } 789 } 790 791 case '<': // generic arguments 792 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 793 startSbp, 794 sbp - startSbp)); 795 outer = new ClassType(outer, sigToTypes('>'), t) { 796 boolean completed = false; 797 @Override @DefinedBy(Api.LANGUAGE_MODEL) 798 public Type getEnclosingType() { 799 if (!completed) { 800 completed = true; 801 tsym.complete(); 802 Type enclosingType = tsym.type.getEnclosingType(); 803 if (enclosingType != Type.noType) { 804 List<Type> typeArgs = 805 super.getEnclosingType().allparams(); 806 List<Type> typeParams = 807 enclosingType.allparams(); 808 if (typeParams.length() != typeArgs.length()) { 809 // no "rare" types 810 super.setEnclosingType(types.erasure(enclosingType)); 811 } else { 812 super.setEnclosingType(types.subst(enclosingType, 813 typeParams, 814 typeArgs)); 815 } 816 } else { 817 super.setEnclosingType(Type.noType); 818 } 819 } 820 return super.getEnclosingType(); 821 } 822 @Override 823 public void setEnclosingType(Type outer) { 824 throw new UnsupportedOperationException(); 825 } 826 }; 827 switch (signature[sigp++]) { 828 case ';': 829 if (sigp < signature.length && signature[sigp] == '.') { 830 // support old-style GJC signatures 831 // The signature produced was 832 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 833 // rather than say 834 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 835 // so we skip past ".Lfoo/Outer$" 836 sigp += (sbp - startSbp) + // "foo/Outer" 837 3; // ".L" and "$" 838 signatureBuffer[sbp++] = (byte)'$'; 839 break; 840 } else { 841 sbp = startSbp; 842 return outer; 843 } 844 case '.': 845 signatureBuffer[sbp++] = (byte)'$'; 846 break; 847 default: 848 throw new AssertionError(signature[sigp-1]); 849 } 850 continue; 851 852 case '.': 853 //we have seen an enclosing non-generic class 854 if (outer != Type.noType) { 855 t = enterClass(names.fromUtf(signatureBuffer, 856 startSbp, 857 sbp - startSbp)); 858 outer = new ClassType(outer, List.nil(), t); 859 } 860 signatureBuffer[sbp++] = (byte)'$'; 861 continue; 862 case '/': 863 signatureBuffer[sbp++] = (byte)'.'; 864 continue; 865 default: 866 signatureBuffer[sbp++] = c; 867 continue; 868 } 869 } 870 } 871 872 /** Convert (implicit) signature to list of types 873 * until `terminator' is encountered. 874 */ 875 List<Type> sigToTypes(char terminator) { 876 List<Type> head = List.of(null); 877 List<Type> tail = head; 878 while (signature[sigp] != terminator) 879 tail = tail.setTail(List.of(sigToType())); 880 sigp++; 881 return head.tail; 882 } 883 884 /** Convert signature to type parameters, where signature is a byte 885 * array segment. 886 */ 887 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 888 signature = sig; 889 sigp = offset; 890 siglimit = offset + len; 891 return sigToTypeParams(); 892 } 893 894 /** Convert signature to type parameters, where signature is implicit. 895 */ 896 List<Type> sigToTypeParams() { 897 List<Type> tvars = List.nil(); 898 if (signature[sigp] == '<') { 899 sigp++; 900 int start = sigp; 901 sigEnterPhase = true; 902 while (signature[sigp] != '>') 903 tvars = tvars.prepend(sigToTypeParam()); 904 sigEnterPhase = false; 905 sigp = start; 906 while (signature[sigp] != '>') 907 sigToTypeParam(); 908 sigp++; 909 } 910 return tvars.reverse(); 911 } 912 913 /** Convert (implicit) signature to type parameter. 914 */ 915 Type sigToTypeParam() { 916 int start = sigp; 917 while (signature[sigp] != ':') sigp++; 918 Name name = names.fromUtf(signature, start, sigp - start); 919 TypeVar tvar; 920 if (sigEnterPhase) { 921 tvar = new TypeVar(name, currentOwner, syms.botType); 922 typevars.enter(tvar.tsym); 923 } else { 924 tvar = (TypeVar)findTypeVar(name); 925 } 926 List<Type> bounds = List.nil(); 927 boolean allInterfaces = false; 928 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 929 sigp++; 930 allInterfaces = true; 931 } 932 while (signature[sigp] == ':') { 933 sigp++; 934 bounds = bounds.prepend(sigToType()); 935 } 936 if (!sigEnterPhase) { 937 types.setBounds(tvar, bounds.reverse(), allInterfaces); 938 } 939 return tvar; 940 } 941 942 /** Find type variable with given name in `typevars' scope. 943 */ 944 Type findTypeVar(Name name) { 945 Symbol s = typevars.findFirst(name); 946 if (s != null) { 947 return s.type; 948 } else { 949 if (readingClassAttr) { 950 // While reading the class attribute, the supertypes 951 // might refer to a type variable from an enclosing element 952 // (method or class). 953 // If the type variable is defined in the enclosing class, 954 // we can actually find it in 955 // currentOwner.owner.type.getTypeArguments() 956 // However, until we have read the enclosing method attribute 957 // we don't know for sure if this owner is correct. It could 958 // be a method and there is no way to tell before reading the 959 // enclosing method attribute. 960 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 961 missingTypeVariables = missingTypeVariables.prepend(t); 962 // System.err.println("Missing type var " + name); 963 return t; 964 } 965 throw badClassFile("undecl.type.var", name); 966 } 967 } 968 969/************************************************************************ 970 * Reading Attributes 971 ***********************************************************************/ 972 973 protected enum AttributeKind { CLASS, MEMBER } 974 975 protected abstract class AttributeReader { 976 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 977 this.name = name; 978 this.version = version; 979 this.kinds = kinds; 980 } 981 982 protected boolean accepts(AttributeKind kind) { 983 if (kinds.contains(kind)) { 984 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 985 return true; 986 987 if (lintClassfile && !warnedAttrs.contains(name)) { 988 JavaFileObject prev = log.useSource(currentClassFile); 989 try { 990 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, 991 Warnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion)); 992 } finally { 993 log.useSource(prev); 994 } 995 warnedAttrs.add(name); 996 } 997 } 998 return false; 999 } 1000 1001 protected abstract void read(Symbol sym, int attrLen); 1002 1003 protected final Name name; 1004 protected final ClassFile.Version version; 1005 protected final Set<AttributeKind> kinds; 1006 } 1007 1008 protected Set<AttributeKind> CLASS_ATTRIBUTE = 1009 EnumSet.of(AttributeKind.CLASS); 1010 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 1011 EnumSet.of(AttributeKind.MEMBER); 1012 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 1013 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 1014 1015 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 1016 1017 private void initAttributeReaders() { 1018 AttributeReader[] readers = { 1019 // v45.3 attributes 1020 1021 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 1022 protected void read(Symbol sym, int attrLen) { 1023 if (readAllOfClassFile || saveParameterNames) 1024 ((MethodSymbol)sym).code = readCode(sym); 1025 else 1026 bp = bp + attrLen; 1027 } 1028 }, 1029 1030 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 1031 protected void read(Symbol sym, int attrLen) { 1032 Object v = readPool(nextChar()); 1033 // Ignore ConstantValue attribute if field not final. 1034 if ((sym.flags() & FINAL) == 0) { 1035 return; 1036 } 1037 VarSymbol var = (VarSymbol) sym; 1038 switch (var.type.getTag()) { 1039 case BOOLEAN: 1040 case BYTE: 1041 case CHAR: 1042 case SHORT: 1043 case INT: 1044 checkType(var, Integer.class, v); 1045 break; 1046 case LONG: 1047 checkType(var, Long.class, v); 1048 break; 1049 case FLOAT: 1050 checkType(var, Float.class, v); 1051 break; 1052 case DOUBLE: 1053 checkType(var, Double.class, v); 1054 break; 1055 case CLASS: 1056 Assert.check(var.type.tsym == syms.stringType.tsym); 1057 checkType(var, String.class, v); 1058 break; 1059 default: 1060 // ignore ConstantValue attribute if type is not primitive or String 1061 return; 1062 } 1063 if (v instanceof Integer && !var.type.getTag().checkRange((Integer) v)) { 1064 throw badClassFile("bad.constant.range", v, var, var.type); 1065 } 1066 var.setData(v); 1067 } 1068 1069 void checkType(Symbol var, Class<?> clazz, Object value) { 1070 if (!clazz.isInstance(value)) { 1071 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName()); 1072 } 1073 } 1074 }, 1075 1076 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1077 protected void read(Symbol sym, int attrLen) { 1078 Symbol s = sym.owner.kind == MDL ? sym.owner : sym; 1079 1080 s.flags_field |= DEPRECATED; 1081 } 1082 }, 1083 1084 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1085 protected void read(Symbol sym, int attrLen) { 1086 int nexceptions = nextChar(); 1087 List<Type> thrown = List.nil(); 1088 for (int j = 0; j < nexceptions; j++) 1089 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 1090 if (sym.type.getThrownTypes().isEmpty()) 1091 sym.type.asMethodType().thrown = thrown.reverse(); 1092 } 1093 }, 1094 1095 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 1096 protected void read(Symbol sym, int attrLen) { 1097 ClassSymbol c = (ClassSymbol) sym; 1098 if (currentModule.module_info == c) { 1099 //prevent entering the classes too soon: 1100 skipInnerClasses(); 1101 } else { 1102 readInnerClasses(c); 1103 } 1104 } 1105 }, 1106 1107 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1108 protected void read(Symbol sym, int attrLen) { 1109 int newbp = bp + attrLen; 1110 if (saveParameterNames && !sawMethodParameters) { 1111 // Pick up parameter names from the variable table. 1112 // Parameter names are not explicitly identified as such, 1113 // but all parameter name entries in the LocalVariableTable 1114 // have a start_pc of 0. Therefore, we record the name 1115 // indicies of all slots with a start_pc of zero in the 1116 // parameterNameIndicies array. 1117 // Note that this implicitly honors the JVMS spec that 1118 // there may be more than one LocalVariableTable, and that 1119 // there is no specified ordering for the entries. 1120 int numEntries = nextChar(); 1121 for (int i = 0; i < numEntries; i++) { 1122 int start_pc = nextChar(); 1123 int length = nextChar(); 1124 int nameIndex = nextChar(); 1125 int sigIndex = nextChar(); 1126 int register = nextChar(); 1127 if (start_pc == 0) { 1128 // ensure array large enough 1129 if (register >= parameterNameIndices.length) { 1130 int newSize = 1131 Math.max(register + 1, parameterNameIndices.length + 8); 1132 parameterNameIndices = 1133 Arrays.copyOf(parameterNameIndices, newSize); 1134 } 1135 parameterNameIndices[register] = nameIndex; 1136 haveParameterNameIndices = true; 1137 } 1138 } 1139 } 1140 bp = newbp; 1141 } 1142 }, 1143 1144 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1145 protected void read(Symbol sym, int attrLen) { 1146 ClassSymbol c = (ClassSymbol) sym; 1147 Name n = readName(nextChar()); 1148 c.sourcefile = new SourceFileObject(n, c.flatname); 1149 // If the class is a toplevel class, originating from a Java source file, 1150 // but the class name does not match the file name, then it is 1151 // an auxiliary class. 1152 String sn = n.toString(); 1153 if (c.owner.kind == PCK && 1154 sn.endsWith(".java") && 1155 !sn.equals(c.name.toString()+".java")) { 1156 c.flags_field |= AUXILIARY; 1157 } 1158 } 1159 }, 1160 1161 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1162 protected void read(Symbol sym, int attrLen) { 1163 sym.flags_field |= SYNTHETIC; 1164 } 1165 }, 1166 1167 // standard v49 attributes 1168 1169 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1170 protected void read(Symbol sym, int attrLen) { 1171 int newbp = bp + attrLen; 1172 readEnclosingMethodAttr(sym); 1173 bp = newbp; 1174 } 1175 }, 1176 1177 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1178 protected void read(Symbol sym, int attrLen) { 1179 if (sym.kind == TYP) { 1180 ClassSymbol c = (ClassSymbol) sym; 1181 readingClassAttr = true; 1182 try { 1183 ClassType ct1 = (ClassType)c.type; 1184 Assert.check(c == currentOwner); 1185 ct1.typarams_field = readTypeParams(nextChar()); 1186 ct1.supertype_field = sigToType(); 1187 ListBuffer<Type> is = new ListBuffer<>(); 1188 while (sigp != siglimit) is.append(sigToType()); 1189 ct1.interfaces_field = is.toList(); 1190 } finally { 1191 readingClassAttr = false; 1192 } 1193 } else { 1194 List<Type> thrown = sym.type.getThrownTypes(); 1195 sym.type = readType(nextChar()); 1196 //- System.err.println(" # " + sym.type); 1197 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1198 sym.type.asMethodType().thrown = thrown; 1199 1200 } 1201 } 1202 }, 1203 1204 // v49 annotation attributes 1205 1206 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1207 protected void read(Symbol sym, int attrLen) { 1208 attachAnnotationDefault(sym); 1209 } 1210 }, 1211 1212 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1213 protected void read(Symbol sym, int attrLen) { 1214 attachAnnotations(sym); 1215 } 1216 }, 1217 1218 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1219 protected void read(Symbol sym, int attrLen) { 1220 attachParameterAnnotations(sym); 1221 } 1222 }, 1223 1224 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1225 protected void read(Symbol sym, int attrLen) { 1226 attachAnnotations(sym); 1227 } 1228 }, 1229 1230 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1231 protected void read(Symbol sym, int attrLen) { 1232 attachParameterAnnotations(sym); 1233 } 1234 }, 1235 1236 // additional "legacy" v49 attributes, superceded by flags 1237 1238 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1239 protected void read(Symbol sym, int attrLen) { 1240 sym.flags_field |= ANNOTATION; 1241 } 1242 }, 1243 1244 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1245 protected void read(Symbol sym, int attrLen) { 1246 sym.flags_field |= BRIDGE; 1247 } 1248 }, 1249 1250 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1251 protected void read(Symbol sym, int attrLen) { 1252 sym.flags_field |= ENUM; 1253 } 1254 }, 1255 1256 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1257 protected void read(Symbol sym, int attrLen) { 1258 sym.flags_field |= VARARGS; 1259 } 1260 }, 1261 1262 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1263 protected void read(Symbol sym, int attrLen) { 1264 attachTypeAnnotations(sym); 1265 } 1266 }, 1267 1268 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1269 protected void read(Symbol sym, int attrLen) { 1270 attachTypeAnnotations(sym); 1271 } 1272 }, 1273 1274 // The following attributes for a Code attribute are not currently handled 1275 // StackMapTable 1276 // SourceDebugExtension 1277 // LineNumberTable 1278 // LocalVariableTypeTable 1279 1280 // standard v52 attributes 1281 1282 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1283 protected void read(Symbol sym, int attrlen) { 1284 int newbp = bp + attrlen; 1285 if (saveParameterNames) { 1286 sawMethodParameters = true; 1287 int numEntries = nextByte(); 1288 parameterNameIndices = new int[numEntries]; 1289 haveParameterNameIndices = true; 1290 for (int i = 0; i < numEntries; i++) { 1291 int nameIndex = nextChar(); 1292 int flags = nextChar(); 1293 parameterNameIndices[i] = nameIndex; 1294 } 1295 } 1296 bp = newbp; 1297 } 1298 }, 1299 1300 // standard v53 attributes 1301 1302 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) { 1303 @Override 1304 protected boolean accepts(AttributeKind kind) { 1305 return super.accepts(kind) && allowModules; 1306 } 1307 protected void read(Symbol sym, int attrLen) { 1308 if (sym.kind == TYP && sym.owner.kind == MDL) { 1309 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1310 ListBuffer<Directive> directives = new ListBuffer<>(); 1311 1312 Name moduleName = readModuleName(nextChar()); 1313 if (currentModule.name != moduleName) { 1314 throw badClassFile("module.name.mismatch", moduleName, currentModule.name); 1315 } 1316 1317 msym.flags.addAll(readModuleFlags(nextChar())); 1318 msym.version = readName(nextChar()); 1319 1320 ListBuffer<RequiresDirective> requires = new ListBuffer<>(); 1321 int nrequires = nextChar(); 1322 for (int i = 0; i < nrequires; i++) { 1323 ModuleSymbol rsym = syms.enterModule(readModuleName(nextChar())); 1324 Set<RequiresFlag> flags = readRequiresFlags(nextChar()); 1325 nextChar(); // skip compiled version 1326 requires.add(new RequiresDirective(rsym, flags)); 1327 } 1328 msym.requires = requires.toList(); 1329 directives.addAll(msym.requires); 1330 1331 ListBuffer<ExportsDirective> exports = new ListBuffer<>(); 1332 int nexports = nextChar(); 1333 for (int i = 0; i < nexports; i++) { 1334 Name n = readName(nextChar()); 1335 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n))); 1336 Set<ExportsFlag> flags = readExportsFlags(nextChar()); 1337 int nto = nextChar(); 1338 List<ModuleSymbol> to; 1339 if (nto == 0) { 1340 to = null; 1341 } else { 1342 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1343 for (int t = 0; t < nto; t++) 1344 lb.append(syms.enterModule(readModuleName(nextChar()))); 1345 to = lb.toList(); 1346 } 1347 exports.add(new ExportsDirective(p, to, flags)); 1348 } 1349 msym.exports = exports.toList(); 1350 directives.addAll(msym.exports); 1351 ListBuffer<OpensDirective> opens = new ListBuffer<>(); 1352 int nopens = nextChar(); 1353 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) { 1354 throw badClassFile("module.non.zero.opens", currentModule.name); 1355 } 1356 for (int i = 0; i < nopens; i++) { 1357 Name n = readName(nextChar()); 1358 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n))); 1359 Set<OpensFlag> flags = readOpensFlags(nextChar()); 1360 int nto = nextChar(); 1361 List<ModuleSymbol> to; 1362 if (nto == 0) { 1363 to = null; 1364 } else { 1365 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1366 for (int t = 0; t < nto; t++) 1367 lb.append(syms.enterModule(readModuleName(nextChar()))); 1368 to = lb.toList(); 1369 } 1370 opens.add(new OpensDirective(p, to, flags)); 1371 } 1372 msym.opens = opens.toList(); 1373 directives.addAll(msym.opens); 1374 1375 msym.directives = directives.toList(); 1376 1377 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>(); 1378 int nuses = nextChar(); 1379 for (int i = 0; i < nuses; i++) { 1380 Name srvc = readClassName(nextChar()); 1381 uses.add(new InterimUsesDirective(srvc)); 1382 } 1383 interimUses = uses.toList(); 1384 1385 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>(); 1386 int nprovides = nextChar(); 1387 for (int p = 0; p < nprovides; p++) { 1388 Name srvc = readClassName(nextChar()); 1389 int nimpls = nextChar(); 1390 ListBuffer<Name> impls = new ListBuffer<>(); 1391 for (int i = 0; i < nimpls; i++) { 1392 impls.append(readClassName(nextChar())); 1393 provides.add(new InterimProvidesDirective(srvc, impls.toList())); 1394 } 1395 } 1396 interimProvides = provides.toList(); 1397 } 1398 } 1399 }, 1400 1401 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) { 1402 @Override 1403 protected boolean accepts(AttributeKind kind) { 1404 return super.accepts(kind) && allowModules; 1405 } 1406 protected void read(Symbol sym, int attrLen) { 1407 if (sym.kind == TYP && sym.owner.kind == MDL) { 1408 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1409 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar())); 1410 } 1411 } 1412 }, 1413 }; 1414 1415 for (AttributeReader r: readers) 1416 attributeReaders.put(r.name, r); 1417 } 1418 1419 protected void readEnclosingMethodAttr(Symbol sym) { 1420 // sym is a nested class with an "Enclosing Method" attribute 1421 // remove sym from it's current owners scope and place it in 1422 // the scope specified by the attribute 1423 sym.owner.members().remove(sym); 1424 ClassSymbol self = (ClassSymbol)sym; 1425 ClassSymbol c = readClassSymbol(nextChar()); 1426 NameAndType nt = readNameAndType(nextChar()); 1427 1428 if (c.members_field == null || c.kind != TYP) 1429 throw badClassFile("bad.enclosing.class", self, c); 1430 1431 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1432 if (nt != null && m == null) 1433 throw badEnclosingMethod(self); 1434 1435 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1436 self.owner = m != null ? m : c; 1437 if (self.name.isEmpty()) 1438 self.fullname = names.empty; 1439 else 1440 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1441 1442 if (m != null) { 1443 ((ClassType)sym.type).setEnclosingType(m.type); 1444 } else if ((self.flags_field & STATIC) == 0) { 1445 ((ClassType)sym.type).setEnclosingType(c.type); 1446 } else { 1447 ((ClassType)sym.type).setEnclosingType(Type.noType); 1448 } 1449 enterTypevars(self, self.type); 1450 if (!missingTypeVariables.isEmpty()) { 1451 ListBuffer<Type> typeVars = new ListBuffer<>(); 1452 for (Type typevar : missingTypeVariables) { 1453 typeVars.append(findTypeVar(typevar.tsym.name)); 1454 } 1455 foundTypeVariables = typeVars.toList(); 1456 } else { 1457 foundTypeVariables = List.nil(); 1458 } 1459 } 1460 1461 // See java.lang.Class 1462 private Name simpleBinaryName(Name self, Name enclosing) { 1463 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1464 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1465 throw badClassFile("bad.enclosing.method", self); 1466 int index = 1; 1467 while (index < simpleBinaryName.length() && 1468 isAsciiDigit(simpleBinaryName.charAt(index))) 1469 index++; 1470 return names.fromString(simpleBinaryName.substring(index)); 1471 } 1472 1473 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1474 if (nt == null) 1475 return null; 1476 1477 MethodType type = nt.uniqueType.type.asMethodType(); 1478 1479 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1480 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1481 return (MethodSymbol)sym; 1482 } 1483 1484 if (nt.name != names.init) 1485 // not a constructor 1486 return null; 1487 if ((flags & INTERFACE) != 0) 1488 // no enclosing instance 1489 return null; 1490 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1491 // no parameters 1492 return null; 1493 1494 // A constructor of an inner class. 1495 // Remove the first argument (the enclosing instance) 1496 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1497 nt.uniqueType.type.getReturnType(), 1498 nt.uniqueType.type.getThrownTypes(), 1499 syms.methodClass)); 1500 // Try searching again 1501 return findMethod(nt, scope, flags); 1502 } 1503 1504 /** Similar to Types.isSameType but avoids completion */ 1505 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1506 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1507 .prepend(types.erasure(mt1.getReturnType())); 1508 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1509 while (!types1.isEmpty() && !types2.isEmpty()) { 1510 if (types1.head.tsym != types2.head.tsym) 1511 return false; 1512 types1 = types1.tail; 1513 types2 = types2.tail; 1514 } 1515 return types1.isEmpty() && types2.isEmpty(); 1516 } 1517 1518 /** 1519 * Character.isDigit answers <tt>true</tt> to some non-ascii 1520 * digits. This one does not. <b>copied from java.lang.Class</b> 1521 */ 1522 private static boolean isAsciiDigit(char c) { 1523 return '0' <= c && c <= '9'; 1524 } 1525 1526 /** Read member attributes. 1527 */ 1528 void readMemberAttrs(Symbol sym) { 1529 readAttrs(sym, AttributeKind.MEMBER); 1530 } 1531 1532 void readAttrs(Symbol sym, AttributeKind kind) { 1533 char ac = nextChar(); 1534 for (int i = 0; i < ac; i++) { 1535 Name attrName = readName(nextChar()); 1536 int attrLen = nextInt(); 1537 AttributeReader r = attributeReaders.get(attrName); 1538 if (r != null && r.accepts(kind)) 1539 r.read(sym, attrLen); 1540 else { 1541 bp = bp + attrLen; 1542 } 1543 } 1544 } 1545 1546 private boolean readingClassAttr = false; 1547 private List<Type> missingTypeVariables = List.nil(); 1548 private List<Type> foundTypeVariables = List.nil(); 1549 1550 /** Read class attributes. 1551 */ 1552 void readClassAttrs(ClassSymbol c) { 1553 readAttrs(c, AttributeKind.CLASS); 1554 } 1555 1556 /** Read code block. 1557 */ 1558 Code readCode(Symbol owner) { 1559 nextChar(); // max_stack 1560 nextChar(); // max_locals 1561 final int code_length = nextInt(); 1562 bp += code_length; 1563 final char exception_table_length = nextChar(); 1564 bp += exception_table_length * 8; 1565 readMemberAttrs(owner); 1566 return null; 1567 } 1568 1569/************************************************************************ 1570 * Reading Java-language annotations 1571 ***********************************************************************/ 1572 1573 /** Attach annotations. 1574 */ 1575 void attachAnnotations(final Symbol sym) { 1576 int numAttributes = nextChar(); 1577 if (numAttributes != 0) { 1578 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1579 for (int i = 0; i<numAttributes; i++) { 1580 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1581 if (proxy.type.tsym == syms.proprietaryType.tsym) 1582 sym.flags_field |= PROPRIETARY; 1583 else if (proxy.type.tsym == syms.profileType.tsym) { 1584 if (profile != Profile.DEFAULT) { 1585 for (Pair<Name,Attribute> v: proxy.values) { 1586 if (v.fst == names.value && v.snd instanceof Attribute.Constant) { 1587 Attribute.Constant c = (Attribute.Constant) v.snd; 1588 if (c.type == syms.intType && ((Integer) c.value) > profile.value) { 1589 sym.flags_field |= NOT_IN_PROFILE; 1590 } 1591 } 1592 } 1593 } 1594 } else { 1595 if (proxy.type.tsym == syms.annotationTargetType.tsym) { 1596 target = proxy; 1597 } else if (proxy.type.tsym == syms.repeatableType.tsym) { 1598 repeatable = proxy; 1599 } else if (proxy.type.tsym == syms.deprecatedType.tsym) { 1600 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 1601 for (Pair<Name, Attribute> v : proxy.values) { 1602 if (v.fst == names.forRemoval && v.snd instanceof Attribute.Constant) { 1603 Attribute.Constant c = (Attribute.Constant) v.snd; 1604 if (c.type == syms.booleanType && ((Integer) c.value) != 0) { 1605 sym.flags_field |= DEPRECATED_REMOVAL; 1606 } 1607 } 1608 } 1609 } 1610 1611 proxies.append(proxy); 1612 } 1613 } 1614 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1615 } 1616 } 1617 1618 /** Attach parameter annotations. 1619 */ 1620 void attachParameterAnnotations(final Symbol method) { 1621 final MethodSymbol meth = (MethodSymbol)method; 1622 int numParameters = buf[bp++] & 0xFF; 1623 List<VarSymbol> parameters = meth.params(); 1624 int pnum = 0; 1625 while (parameters.tail != null) { 1626 attachAnnotations(parameters.head); 1627 parameters = parameters.tail; 1628 pnum++; 1629 } 1630 if (pnum != numParameters) { 1631 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1632 } 1633 } 1634 1635 void attachTypeAnnotations(final Symbol sym) { 1636 int numAttributes = nextChar(); 1637 if (numAttributes != 0) { 1638 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1639 for (int i = 0; i < numAttributes; i++) 1640 proxies.append(readTypeAnnotation()); 1641 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1642 } 1643 } 1644 1645 /** Attach the default value for an annotation element. 1646 */ 1647 void attachAnnotationDefault(final Symbol sym) { 1648 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1649 final Attribute value = readAttributeValue(); 1650 1651 // The default value is set later during annotation. It might 1652 // be the case that the Symbol sym is annotated _after_ the 1653 // repeating instances that depend on this default value, 1654 // because of this we set an interim value that tells us this 1655 // element (most likely) has a default. 1656 // 1657 // Set interim value for now, reset just before we do this 1658 // properly at annotate time. 1659 meth.defaultValue = value; 1660 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1661 } 1662 1663 Type readTypeOrClassSymbol(int i) { 1664 // support preliminary jsr175-format class files 1665 if (buf[poolIdx[i]] == CONSTANT_Class) 1666 return readClassSymbol(i).type; 1667 return readTypeToProxy(i); 1668 } 1669 Type readEnumType(int i) { 1670 // support preliminary jsr175-format class files 1671 int index = poolIdx[i]; 1672 int length = getChar(index + 1); 1673 if (buf[index + length + 2] != ';') 1674 return enterClass(readName(i)).type; 1675 return readTypeToProxy(i); 1676 } 1677 Type readTypeToProxy(int i) { 1678 if (currentModule.module_info == currentOwner) { 1679 int index = poolIdx[i]; 1680 return new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1))); 1681 } else { 1682 return readType(i); 1683 } 1684 } 1685 1686 CompoundAnnotationProxy readCompoundAnnotation() { 1687 Type t; 1688 if (currentModule.module_info == currentOwner) { 1689 int index = poolIdx[nextChar()]; 1690 t = new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1))); 1691 } else { 1692 t = readTypeOrClassSymbol(nextChar()); 1693 } 1694 int numFields = nextChar(); 1695 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1696 for (int i=0; i<numFields; i++) { 1697 Name name = readName(nextChar()); 1698 Attribute value = readAttributeValue(); 1699 pairs.append(new Pair<>(name, value)); 1700 } 1701 return new CompoundAnnotationProxy(t, pairs.toList()); 1702 } 1703 1704 TypeAnnotationProxy readTypeAnnotation() { 1705 TypeAnnotationPosition position = readPosition(); 1706 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1707 1708 return new TypeAnnotationProxy(proxy, position); 1709 } 1710 1711 TypeAnnotationPosition readPosition() { 1712 int tag = nextByte(); // TargetType tag is a byte 1713 1714 if (!TargetType.isValidTargetTypeValue(tag)) 1715 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1716 1717 TargetType type = TargetType.fromTargetTypeValue(tag); 1718 1719 switch (type) { 1720 // instanceof 1721 case INSTANCEOF: { 1722 final int offset = nextChar(); 1723 final TypeAnnotationPosition position = 1724 TypeAnnotationPosition.instanceOf(readTypePath()); 1725 position.offset = offset; 1726 return position; 1727 } 1728 // new expression 1729 case NEW: { 1730 final int offset = nextChar(); 1731 final TypeAnnotationPosition position = 1732 TypeAnnotationPosition.newObj(readTypePath()); 1733 position.offset = offset; 1734 return position; 1735 } 1736 // constructor/method reference receiver 1737 case CONSTRUCTOR_REFERENCE: { 1738 final int offset = nextChar(); 1739 final TypeAnnotationPosition position = 1740 TypeAnnotationPosition.constructorRef(readTypePath()); 1741 position.offset = offset; 1742 return position; 1743 } 1744 case METHOD_REFERENCE: { 1745 final int offset = nextChar(); 1746 final TypeAnnotationPosition position = 1747 TypeAnnotationPosition.methodRef(readTypePath()); 1748 position.offset = offset; 1749 return position; 1750 } 1751 // local variable 1752 case LOCAL_VARIABLE: { 1753 final int table_length = nextChar(); 1754 final int[] newLvarOffset = new int[table_length]; 1755 final int[] newLvarLength = new int[table_length]; 1756 final int[] newLvarIndex = new int[table_length]; 1757 1758 for (int i = 0; i < table_length; ++i) { 1759 newLvarOffset[i] = nextChar(); 1760 newLvarLength[i] = nextChar(); 1761 newLvarIndex[i] = nextChar(); 1762 } 1763 1764 final TypeAnnotationPosition position = 1765 TypeAnnotationPosition.localVariable(readTypePath()); 1766 position.lvarOffset = newLvarOffset; 1767 position.lvarLength = newLvarLength; 1768 position.lvarIndex = newLvarIndex; 1769 return position; 1770 } 1771 // resource variable 1772 case RESOURCE_VARIABLE: { 1773 final int table_length = nextChar(); 1774 final int[] newLvarOffset = new int[table_length]; 1775 final int[] newLvarLength = new int[table_length]; 1776 final int[] newLvarIndex = new int[table_length]; 1777 1778 for (int i = 0; i < table_length; ++i) { 1779 newLvarOffset[i] = nextChar(); 1780 newLvarLength[i] = nextChar(); 1781 newLvarIndex[i] = nextChar(); 1782 } 1783 1784 final TypeAnnotationPosition position = 1785 TypeAnnotationPosition.resourceVariable(readTypePath()); 1786 position.lvarOffset = newLvarOffset; 1787 position.lvarLength = newLvarLength; 1788 position.lvarIndex = newLvarIndex; 1789 return position; 1790 } 1791 // exception parameter 1792 case EXCEPTION_PARAMETER: { 1793 final int exception_index = nextChar(); 1794 final TypeAnnotationPosition position = 1795 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1796 position.setExceptionIndex(exception_index); 1797 return position; 1798 } 1799 // method receiver 1800 case METHOD_RECEIVER: 1801 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1802 // type parameter 1803 case CLASS_TYPE_PARAMETER: { 1804 final int parameter_index = nextByte(); 1805 return TypeAnnotationPosition 1806 .typeParameter(readTypePath(), parameter_index); 1807 } 1808 case METHOD_TYPE_PARAMETER: { 1809 final int parameter_index = nextByte(); 1810 return TypeAnnotationPosition 1811 .methodTypeParameter(readTypePath(), parameter_index); 1812 } 1813 // type parameter bound 1814 case CLASS_TYPE_PARAMETER_BOUND: { 1815 final int parameter_index = nextByte(); 1816 final int bound_index = nextByte(); 1817 return TypeAnnotationPosition 1818 .typeParameterBound(readTypePath(), parameter_index, 1819 bound_index); 1820 } 1821 case METHOD_TYPE_PARAMETER_BOUND: { 1822 final int parameter_index = nextByte(); 1823 final int bound_index = nextByte(); 1824 return TypeAnnotationPosition 1825 .methodTypeParameterBound(readTypePath(), parameter_index, 1826 bound_index); 1827 } 1828 // class extends or implements clause 1829 case CLASS_EXTENDS: { 1830 final int type_index = nextChar(); 1831 return TypeAnnotationPosition.classExtends(readTypePath(), 1832 type_index); 1833 } 1834 // throws 1835 case THROWS: { 1836 final int type_index = nextChar(); 1837 return TypeAnnotationPosition.methodThrows(readTypePath(), 1838 type_index); 1839 } 1840 // method parameter 1841 case METHOD_FORMAL_PARAMETER: { 1842 final int parameter_index = nextByte(); 1843 return TypeAnnotationPosition.methodParameter(readTypePath(), 1844 parameter_index); 1845 } 1846 // type cast 1847 case CAST: { 1848 final int offset = nextChar(); 1849 final int type_index = nextByte(); 1850 final TypeAnnotationPosition position = 1851 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1852 position.offset = offset; 1853 return position; 1854 } 1855 // method/constructor/reference type argument 1856 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1857 final int offset = nextChar(); 1858 final int type_index = nextByte(); 1859 final TypeAnnotationPosition position = TypeAnnotationPosition 1860 .constructorInvocationTypeArg(readTypePath(), type_index); 1861 position.offset = offset; 1862 return position; 1863 } 1864 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1865 final int offset = nextChar(); 1866 final int type_index = nextByte(); 1867 final TypeAnnotationPosition position = TypeAnnotationPosition 1868 .methodInvocationTypeArg(readTypePath(), type_index); 1869 position.offset = offset; 1870 return position; 1871 } 1872 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1873 final int offset = nextChar(); 1874 final int type_index = nextByte(); 1875 final TypeAnnotationPosition position = TypeAnnotationPosition 1876 .constructorRefTypeArg(readTypePath(), type_index); 1877 position.offset = offset; 1878 return position; 1879 } 1880 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1881 final int offset = nextChar(); 1882 final int type_index = nextByte(); 1883 final TypeAnnotationPosition position = TypeAnnotationPosition 1884 .methodRefTypeArg(readTypePath(), type_index); 1885 position.offset = offset; 1886 return position; 1887 } 1888 // We don't need to worry about these 1889 case METHOD_RETURN: 1890 return TypeAnnotationPosition.methodReturn(readTypePath()); 1891 case FIELD: 1892 return TypeAnnotationPosition.field(readTypePath()); 1893 case UNKNOWN: 1894 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1895 default: 1896 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1897 } 1898 } 1899 1900 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1901 int len = nextByte(); 1902 ListBuffer<Integer> loc = new ListBuffer<>(); 1903 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1904 loc = loc.append(nextByte()); 1905 1906 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1907 1908 } 1909 1910 Attribute readAttributeValue() { 1911 char c = (char) buf[bp++]; 1912 switch (c) { 1913 case 'B': 1914 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1915 case 'C': 1916 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1917 case 'D': 1918 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1919 case 'F': 1920 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1921 case 'I': 1922 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1923 case 'J': 1924 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1925 case 'S': 1926 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1927 case 'Z': 1928 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1929 case 's': 1930 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1931 case 'e': 1932 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1933 case 'c': 1934 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar())); 1935 case '[': { 1936 int n = nextChar(); 1937 ListBuffer<Attribute> l = new ListBuffer<>(); 1938 for (int i=0; i<n; i++) 1939 l.append(readAttributeValue()); 1940 return new ArrayAttributeProxy(l.toList()); 1941 } 1942 case '@': 1943 return readCompoundAnnotation(); 1944 default: 1945 throw new AssertionError("unknown annotation tag '" + c + "'"); 1946 } 1947 } 1948 1949 interface ProxyVisitor extends Attribute.Visitor { 1950 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1951 void visitClassAttributeProxy(ClassAttributeProxy proxy); 1952 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1953 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1954 } 1955 1956 static class EnumAttributeProxy extends Attribute { 1957 Type enumType; 1958 Name enumerator; 1959 public EnumAttributeProxy(Type enumType, Name enumerator) { 1960 super(null); 1961 this.enumType = enumType; 1962 this.enumerator = enumerator; 1963 } 1964 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1965 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1966 public String toString() { 1967 return "/*proxy enum*/" + enumType + "." + enumerator; 1968 } 1969 } 1970 1971 static class ClassAttributeProxy extends Attribute { 1972 Type classType; 1973 public ClassAttributeProxy(Type classType) { 1974 super(null); 1975 this.classType = classType; 1976 } 1977 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); } 1978 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1979 public String toString() { 1980 return "/*proxy class*/" + classType + ".class"; 1981 } 1982 } 1983 1984 static class ArrayAttributeProxy extends Attribute { 1985 List<Attribute> values; 1986 ArrayAttributeProxy(List<Attribute> values) { 1987 super(null); 1988 this.values = values; 1989 } 1990 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1991 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1992 public String toString() { 1993 return "{" + values + "}"; 1994 } 1995 } 1996 1997 /** A temporary proxy representing a compound attribute. 1998 */ 1999 static class CompoundAnnotationProxy extends Attribute { 2000 final List<Pair<Name,Attribute>> values; 2001 public CompoundAnnotationProxy(Type type, 2002 List<Pair<Name,Attribute>> values) { 2003 super(type); 2004 this.values = values; 2005 } 2006 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 2007 @Override @DefinedBy(Api.LANGUAGE_MODEL) 2008 public String toString() { 2009 StringBuilder buf = new StringBuilder(); 2010 buf.append("@"); 2011 buf.append(type.tsym.getQualifiedName()); 2012 buf.append("/*proxy*/{"); 2013 boolean first = true; 2014 for (List<Pair<Name,Attribute>> v = values; 2015 v.nonEmpty(); v = v.tail) { 2016 Pair<Name,Attribute> value = v.head; 2017 if (!first) buf.append(","); 2018 first = false; 2019 buf.append(value.fst); 2020 buf.append("="); 2021 buf.append(value.snd); 2022 } 2023 buf.append("}"); 2024 return buf.toString(); 2025 } 2026 } 2027 2028 /** A temporary proxy representing a type annotation. 2029 */ 2030 static class TypeAnnotationProxy { 2031 final CompoundAnnotationProxy compound; 2032 final TypeAnnotationPosition position; 2033 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 2034 TypeAnnotationPosition position) { 2035 this.compound = compound; 2036 this.position = position; 2037 } 2038 } 2039 2040 class AnnotationDeproxy implements ProxyVisitor { 2041 private ClassSymbol requestingOwner; 2042 2043 AnnotationDeproxy(ClassSymbol owner) { 2044 this.requestingOwner = owner; 2045 } 2046 2047 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 2048 // also must fill in types!!!! 2049 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 2050 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 2051 buf.append(deproxyCompound(l.head)); 2052 } 2053 return buf.toList(); 2054 } 2055 2056 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 2057 Type annotationType = resolvePossibleProxyType(a.type); 2058 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 2059 for (List<Pair<Name,Attribute>> l = a.values; 2060 l.nonEmpty(); 2061 l = l.tail) { 2062 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst); 2063 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 2064 } 2065 return new Attribute.Compound(annotationType, buf.toList()); 2066 } 2067 2068 MethodSymbol findAccessMethod(Type container, Name name) { 2069 CompletionFailure failure = null; 2070 try { 2071 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 2072 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 2073 return (MethodSymbol) sym; 2074 } 2075 } catch (CompletionFailure ex) { 2076 failure = ex; 2077 } 2078 // The method wasn't found: emit a warning and recover 2079 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 2080 try { 2081 if (lintClassfile) { 2082 if (failure == null) { 2083 log.warning(Warnings.AnnotationMethodNotFound(container, name)); 2084 } else { 2085 log.warning(Warnings.AnnotationMethodNotFoundReason(container, 2086 name, 2087 failure.getDetailValue()));//diagnostic, if present 2088 } 2089 } 2090 } finally { 2091 log.useSource(prevSource); 2092 } 2093 // Construct a new method type and symbol. Use bottom 2094 // type (typeof null) as return type because this type is 2095 // a subtype of all reference types and can be converted 2096 // to primitive types by unboxing. 2097 MethodType mt = new MethodType(List.nil(), 2098 syms.botType, 2099 List.nil(), 2100 syms.methodClass); 2101 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 2102 } 2103 2104 Attribute result; 2105 Type type; 2106 Attribute deproxy(Type t, Attribute a) { 2107 Type oldType = type; 2108 try { 2109 type = t; 2110 a.accept(this); 2111 return result; 2112 } finally { 2113 type = oldType; 2114 } 2115 } 2116 2117 // implement Attribute.Visitor below 2118 2119 public void visitConstant(Attribute.Constant value) { 2120 // assert value.type == type; 2121 result = value; 2122 } 2123 2124 public void visitClass(Attribute.Class clazz) { 2125 result = clazz; 2126 } 2127 2128 public void visitEnum(Attribute.Enum e) { 2129 throw new AssertionError(); // shouldn't happen 2130 } 2131 2132 public void visitCompound(Attribute.Compound compound) { 2133 throw new AssertionError(); // shouldn't happen 2134 } 2135 2136 public void visitArray(Attribute.Array array) { 2137 throw new AssertionError(); // shouldn't happen 2138 } 2139 2140 public void visitError(Attribute.Error e) { 2141 throw new AssertionError(); // shouldn't happen 2142 } 2143 2144 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 2145 // type.tsym.flatName() should == proxy.enumFlatName 2146 Type enumType = resolvePossibleProxyType(proxy.enumType); 2147 TypeSymbol enumTypeSym = enumType.tsym; 2148 VarSymbol enumerator = null; 2149 CompletionFailure failure = null; 2150 try { 2151 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 2152 if (sym.kind == VAR) { 2153 enumerator = (VarSymbol)sym; 2154 break; 2155 } 2156 } 2157 } 2158 catch (CompletionFailure ex) { 2159 failure = ex; 2160 } 2161 if (enumerator == null) { 2162 if (failure != null) { 2163 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile, 2164 enumTypeSym, 2165 proxy.enumerator, 2166 failure.getDiagnostic())); 2167 } else { 2168 log.warning(Warnings.UnknownEnumConstant(currentClassFile, 2169 enumTypeSym, 2170 proxy.enumerator)); 2171 } 2172 result = new Attribute.Enum(enumTypeSym.type, 2173 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 2174 } else { 2175 result = new Attribute.Enum(enumTypeSym.type, enumerator); 2176 } 2177 } 2178 2179 @Override 2180 public void visitClassAttributeProxy(ClassAttributeProxy proxy) { 2181 Type classType = resolvePossibleProxyType(proxy.classType); 2182 result = new Attribute.Class(types, classType); 2183 } 2184 2185 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 2186 int length = proxy.values.length(); 2187 Attribute[] ats = new Attribute[length]; 2188 Type elemtype = types.elemtype(type); 2189 int i = 0; 2190 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 2191 ats[i++] = deproxy(elemtype, p.head); 2192 } 2193 result = new Attribute.Array(type, ats); 2194 } 2195 2196 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 2197 result = deproxyCompound(proxy); 2198 } 2199 2200 Type resolvePossibleProxyType(Type t) { 2201 if (t instanceof ProxyType) { 2202 Assert.check(requestingOwner.owner.kind == MDL); 2203 ModuleSymbol prevCurrentModule = currentModule; 2204 currentModule = (ModuleSymbol) requestingOwner.owner; 2205 try { 2206 return ((ProxyType) t).resolve(); 2207 } finally { 2208 currentModule = prevCurrentModule; 2209 } 2210 } else { 2211 return t; 2212 } 2213 } 2214 } 2215 2216 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable { 2217 final MethodSymbol sym; 2218 final Attribute value; 2219 final JavaFileObject classFile = currentClassFile; 2220 2221 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 2222 super(currentOwner.kind == MTH 2223 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2224 this.sym = sym; 2225 this.value = value; 2226 } 2227 2228 @Override 2229 public void run() { 2230 JavaFileObject previousClassFile = currentClassFile; 2231 try { 2232 // Reset the interim value set earlier in 2233 // attachAnnotationDefault(). 2234 sym.defaultValue = null; 2235 currentClassFile = classFile; 2236 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 2237 } finally { 2238 currentClassFile = previousClassFile; 2239 } 2240 } 2241 2242 @Override 2243 public String toString() { 2244 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 2245 } 2246 } 2247 2248 class AnnotationCompleter extends AnnotationDeproxy implements Runnable { 2249 final Symbol sym; 2250 final List<CompoundAnnotationProxy> l; 2251 final JavaFileObject classFile; 2252 2253 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 2254 super(currentOwner.kind == MTH 2255 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2256 if (sym.kind == TYP && sym.owner.kind == MDL) { 2257 this.sym = sym.owner; 2258 } else { 2259 this.sym = sym; 2260 } 2261 this.l = l; 2262 this.classFile = currentClassFile; 2263 } 2264 2265 @Override 2266 public void run() { 2267 JavaFileObject previousClassFile = currentClassFile; 2268 try { 2269 currentClassFile = classFile; 2270 List<Attribute.Compound> newList = deproxyCompoundList(l); 2271 for (Attribute.Compound attr : newList) { 2272 if (attr.type.tsym == syms.deprecatedType.tsym) { 2273 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 2274 Attribute forRemoval = attr.member(names.forRemoval); 2275 if (forRemoval instanceof Attribute.Constant) { 2276 Attribute.Constant c = (Attribute.Constant) forRemoval; 2277 if (c.type == syms.booleanType && ((Integer) c.value) != 0) { 2278 sym.flags_field |= DEPRECATED_REMOVAL; 2279 } 2280 } 2281 } 2282 } 2283 if (sym.annotationsPendingCompletion()) { 2284 sym.setDeclarationAttributes(newList); 2285 } else { 2286 sym.appendAttributes(newList); 2287 } 2288 } finally { 2289 currentClassFile = previousClassFile; 2290 } 2291 } 2292 2293 @Override 2294 public String toString() { 2295 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 2296 } 2297 } 2298 2299 class TypeAnnotationCompleter extends AnnotationCompleter { 2300 2301 List<TypeAnnotationProxy> proxies; 2302 2303 TypeAnnotationCompleter(Symbol sym, 2304 List<TypeAnnotationProxy> proxies) { 2305 super(sym, List.nil()); 2306 this.proxies = proxies; 2307 } 2308 2309 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 2310 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 2311 for (TypeAnnotationProxy proxy: proxies) { 2312 Attribute.Compound compound = deproxyCompound(proxy.compound); 2313 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 2314 buf.add(typeCompound); 2315 } 2316 return buf.toList(); 2317 } 2318 2319 @Override 2320 public void run() { 2321 JavaFileObject previousClassFile = currentClassFile; 2322 try { 2323 currentClassFile = classFile; 2324 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 2325 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 2326 } finally { 2327 currentClassFile = previousClassFile; 2328 } 2329 } 2330 } 2331 2332 2333/************************************************************************ 2334 * Reading Symbols 2335 ***********************************************************************/ 2336 2337 /** Read a field. 2338 */ 2339 VarSymbol readField() { 2340 long flags = adjustFieldFlags(nextChar()); 2341 Name name = readName(nextChar()); 2342 Type type = readType(nextChar()); 2343 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2344 readMemberAttrs(v); 2345 return v; 2346 } 2347 2348 /** Read a method. 2349 */ 2350 MethodSymbol readMethod() { 2351 long flags = adjustMethodFlags(nextChar()); 2352 Name name = readName(nextChar()); 2353 Type type = readType(nextChar()); 2354 if (currentOwner.isInterface() && 2355 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2356 if (majorVersion > Version.V52.major || 2357 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 2358 if ((flags & (STATIC | PRIVATE)) == 0) { 2359 currentOwner.flags_field |= DEFAULT; 2360 flags |= DEFAULT | ABSTRACT; 2361 } 2362 } else { 2363 //protect against ill-formed classfiles 2364 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2365 Integer.toString(majorVersion), 2366 Integer.toString(minorVersion)); 2367 } 2368 } 2369 if (name == names.init && currentOwner.hasOuterInstance()) { 2370 // Sometimes anonymous classes don't have an outer 2371 // instance, however, there is no reliable way to tell so 2372 // we never strip this$n 2373 // ditto for local classes. Local classes that have an enclosing method set 2374 // won't pass the "hasOuterInstance" check above, but those that don't have an 2375 // enclosing method (i.e. from initializers) will pass that check. 2376 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE); 2377 if (!currentOwner.name.isEmpty() && !local) 2378 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2379 type.getReturnType(), 2380 type.getThrownTypes(), 2381 syms.methodClass); 2382 } 2383 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2384 if (types.isSignaturePolymorphic(m)) { 2385 m.flags_field |= SIGNATURE_POLYMORPHIC; 2386 } 2387 if (saveParameterNames) 2388 initParameterNames(m); 2389 Symbol prevOwner = currentOwner; 2390 currentOwner = m; 2391 try { 2392 readMemberAttrs(m); 2393 } finally { 2394 currentOwner = prevOwner; 2395 } 2396 if (saveParameterNames) 2397 setParameterNames(m, type); 2398 2399 if ((flags & VARARGS) != 0) { 2400 final Type last = type.getParameterTypes().last(); 2401 if (last == null || !last.hasTag(ARRAY)) { 2402 m.flags_field &= ~VARARGS; 2403 throw badClassFile("malformed.vararg.method", m); 2404 } 2405 } 2406 2407 return m; 2408 } 2409 2410 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2411 boolean isVarargs = (flags & VARARGS) != 0; 2412 if (isVarargs) { 2413 Type varargsElem = args.last(); 2414 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2415 for (Type t : args) { 2416 adjustedArgs.append(t != varargsElem ? 2417 t : 2418 ((ArrayType)t).makeVarargs()); 2419 } 2420 args = adjustedArgs.toList(); 2421 } 2422 return args.tail; 2423 } 2424 2425 /** 2426 * Init the parameter names array. 2427 * Parameter names are currently inferred from the names in the 2428 * LocalVariableTable attributes of a Code attribute. 2429 * (Note: this means parameter names are currently not available for 2430 * methods without a Code attribute.) 2431 * This method initializes an array in which to store the name indexes 2432 * of parameter names found in LocalVariableTable attributes. It is 2433 * slightly supersized to allow for additional slots with a start_pc of 0. 2434 */ 2435 void initParameterNames(MethodSymbol sym) { 2436 // make allowance for synthetic parameters. 2437 final int excessSlots = 4; 2438 int expectedParameterSlots = 2439 Code.width(sym.type.getParameterTypes()) + excessSlots; 2440 if (parameterNameIndices == null 2441 || parameterNameIndices.length < expectedParameterSlots) { 2442 parameterNameIndices = new int[expectedParameterSlots]; 2443 } else 2444 Arrays.fill(parameterNameIndices, 0); 2445 haveParameterNameIndices = false; 2446 sawMethodParameters = false; 2447 } 2448 2449 /** 2450 * Set the parameter names for a symbol from the name index in the 2451 * parameterNameIndicies array. The type of the symbol may have changed 2452 * while reading the method attributes (see the Signature attribute). 2453 * This may be because of generic information or because anonymous 2454 * synthetic parameters were added. The original type (as read from 2455 * the method descriptor) is used to help guess the existence of 2456 * anonymous synthetic parameters. 2457 * On completion, sym.savedParameter names will either be null (if 2458 * no parameter names were found in the class file) or will be set to a 2459 * list of names, one per entry in sym.type.getParameterTypes, with 2460 * any missing names represented by the empty name. 2461 */ 2462 void setParameterNames(MethodSymbol sym, Type jvmType) { 2463 // if no names were found in the class file, there's nothing more to do 2464 if (!haveParameterNameIndices) 2465 return; 2466 // If we get parameter names from MethodParameters, then we 2467 // don't need to skip. 2468 int firstParam = 0; 2469 if (!sawMethodParameters) { 2470 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2471 // the code in readMethod may have skipped the first 2472 // parameter when setting up the MethodType. If so, we 2473 // make a corresponding allowance here for the position of 2474 // the first parameter. Note that this assumes the 2475 // skipped parameter has a width of 1 -- i.e. it is not 2476 // a double width type (long or double.) 2477 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2478 // Sometimes anonymous classes don't have an outer 2479 // instance, however, there is no reliable way to tell so 2480 // we never strip this$n 2481 if (!currentOwner.name.isEmpty()) 2482 firstParam += 1; 2483 } 2484 2485 if (sym.type != jvmType) { 2486 // reading the method attributes has caused the 2487 // symbol's type to be changed. (i.e. the Signature 2488 // attribute.) This may happen if there are hidden 2489 // (synthetic) parameters in the descriptor, but not 2490 // in the Signature. The position of these hidden 2491 // parameters is unspecified; for now, assume they are 2492 // at the beginning, and so skip over them. The 2493 // primary case for this is two hidden parameters 2494 // passed into Enum constructors. 2495 int skip = Code.width(jvmType.getParameterTypes()) 2496 - Code.width(sym.type.getParameterTypes()); 2497 firstParam += skip; 2498 } 2499 } 2500 List<Name> paramNames = List.nil(); 2501 int index = firstParam; 2502 for (Type t: sym.type.getParameterTypes()) { 2503 int nameIdx = (index < parameterNameIndices.length 2504 ? parameterNameIndices[index] : 0); 2505 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2506 paramNames = paramNames.prepend(name); 2507 index += sawMethodParameters ? 1 : Code.width(t); 2508 } 2509 sym.savedParameterNames = paramNames.reverse(); 2510 } 2511 2512 /** 2513 * skip n bytes 2514 */ 2515 void skipBytes(int n) { 2516 bp = bp + n; 2517 } 2518 2519 /** Skip a field or method 2520 */ 2521 void skipMember() { 2522 bp = bp + 6; 2523 char ac = nextChar(); 2524 for (int i = 0; i < ac; i++) { 2525 bp = bp + 2; 2526 int attrLen = nextInt(); 2527 bp = bp + attrLen; 2528 } 2529 } 2530 2531 void skipInnerClasses() { 2532 int n = nextChar(); 2533 for (int i = 0; i < n; i++) { 2534 nextChar(); 2535 nextChar(); 2536 nextChar(); 2537 nextChar(); 2538 } 2539 } 2540 2541 /** Enter type variables of this classtype and all enclosing ones in 2542 * `typevars'. 2543 */ 2544 protected void enterTypevars(Symbol sym, Type t) { 2545 if (t.getEnclosingType() != null) { 2546 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) { 2547 enterTypevars(sym.owner, t.getEnclosingType()); 2548 } 2549 } else if (sym.kind == MTH && !sym.isStatic()) { 2550 enterTypevars(sym.owner, sym.owner.type); 2551 } 2552 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) { 2553 typevars.enter(xs.head.tsym); 2554 } 2555 } 2556 2557 protected ClassSymbol enterClass(Name name) { 2558 return syms.enterClass(currentModule, name); 2559 } 2560 2561 protected ClassSymbol enterClass(Name name, TypeSymbol owner) { 2562 return syms.enterClass(currentModule, name, owner); 2563 } 2564 2565 /** Read contents of a given class symbol `c'. Both external and internal 2566 * versions of an inner class are read. 2567 */ 2568 void readClass(ClassSymbol c) { 2569 ClassType ct = (ClassType)c.type; 2570 2571 // allocate scope for members 2572 c.members_field = WriteableScope.create(c); 2573 2574 // prepare type variable table 2575 typevars = typevars.dup(currentOwner); 2576 if (ct.getEnclosingType().hasTag(CLASS)) 2577 enterTypevars(c.owner, ct.getEnclosingType()); 2578 2579 // read flags, or skip if this is an inner class 2580 long f = nextChar(); 2581 long flags = adjustClassFlags(f); 2582 if ((flags & MODULE) == 0) { 2583 if (c.owner.kind == PCK) c.flags_field = flags; 2584 // read own class name and check that it matches 2585 currentModule = c.packge().modle; 2586 ClassSymbol self = readClassSymbol(nextChar()); 2587 if (c != self) { 2588 throw badClassFile("class.file.wrong.class", 2589 self.flatname); 2590 } 2591 } else { 2592 if (majorVersion < Version.V53.major) { 2593 throw badClassFile("anachronistic.module.info", 2594 Integer.toString(majorVersion), 2595 Integer.toString(minorVersion)); 2596 } 2597 c.flags_field = flags; 2598 currentModule = (ModuleSymbol) c.owner; 2599 int this_class = nextChar(); 2600 // temp, no check on this_class 2601 } 2602 2603 // class attributes must be read before class 2604 // skip ahead to read class attributes 2605 int startbp = bp; 2606 nextChar(); 2607 char interfaceCount = nextChar(); 2608 bp += interfaceCount * 2; 2609 char fieldCount = nextChar(); 2610 for (int i = 0; i < fieldCount; i++) skipMember(); 2611 char methodCount = nextChar(); 2612 for (int i = 0; i < methodCount; i++) skipMember(); 2613 readClassAttrs(c); 2614 2615 if (readAllOfClassFile) { 2616 for (int i = 1; i < poolObj.length; i++) readPool(i); 2617 c.pool = new Pool(poolObj.length, poolObj, types); 2618 } 2619 2620 // reset and read rest of classinfo 2621 bp = startbp; 2622 int n = nextChar(); 2623 if ((flags & MODULE) != 0 && n > 0) { 2624 throw badClassFile("module.info.invalid.super.class"); 2625 } 2626 if (ct.supertype_field == null) 2627 ct.supertype_field = (n == 0) 2628 ? Type.noType 2629 : readClassSymbol(n).erasure(types); 2630 n = nextChar(); 2631 List<Type> is = List.nil(); 2632 for (int i = 0; i < n; i++) { 2633 Type _inter = readClassSymbol(nextChar()).erasure(types); 2634 is = is.prepend(_inter); 2635 } 2636 if (ct.interfaces_field == null) 2637 ct.interfaces_field = is.reverse(); 2638 2639 Assert.check(fieldCount == nextChar()); 2640 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2641 Assert.check(methodCount == nextChar()); 2642 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2643 2644 typevars = typevars.leave(); 2645 } 2646 2647 /** Read inner class info. For each inner/outer pair allocate a 2648 * member class. 2649 */ 2650 void readInnerClasses(ClassSymbol c) { 2651 int n = nextChar(); 2652 for (int i = 0; i < n; i++) { 2653 nextChar(); // skip inner class symbol 2654 ClassSymbol outer = readClassSymbol(nextChar()); 2655 Name name = readName(nextChar()); 2656 if (name == null) name = names.empty; 2657 long flags = adjustClassFlags(nextChar()); 2658 if (outer != null) { // we have a member class 2659 if (name == names.empty) 2660 name = names.one; 2661 ClassSymbol member = enterClass(name, outer); 2662 if ((flags & STATIC) == 0) { 2663 ((ClassType)member.type).setEnclosingType(outer.type); 2664 if (member.erasure_field != null) 2665 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2666 } 2667 if (c == outer) { 2668 member.flags_field = flags; 2669 enterMember(c, member); 2670 } 2671 } 2672 } 2673 } 2674 2675 /** Read a class definition from the bytes in buf. 2676 */ 2677 private void readClassBuffer(ClassSymbol c) throws IOException { 2678 int magic = nextInt(); 2679 if (magic != JAVA_MAGIC) 2680 throw badClassFile("illegal.start.of.class.file"); 2681 2682 minorVersion = nextChar(); 2683 majorVersion = nextChar(); 2684 int maxMajor = 53; // Version.MAX().major; //******* TEMPORARY ******* 2685 int maxMinor = Version.MAX().minor; 2686 if (majorVersion > maxMajor || 2687 majorVersion * 1000 + minorVersion < 2688 Version.MIN().major * 1000 + Version.MIN().minor) { 2689 if (majorVersion == (maxMajor + 1)) 2690 log.warning(Warnings.BigMajorVersion(currentClassFile, 2691 majorVersion, 2692 maxMajor)); 2693 else 2694 throw badClassFile("wrong.version", 2695 Integer.toString(majorVersion), 2696 Integer.toString(minorVersion), 2697 Integer.toString(maxMajor), 2698 Integer.toString(maxMinor)); 2699 } 2700 2701 indexPool(); 2702 if (signatureBuffer.length < bp) { 2703 int ns = Integer.highestOneBit(bp) << 1; 2704 signatureBuffer = new byte[ns]; 2705 } 2706 readClass(c); 2707 } 2708 2709 public void readClassFile(ClassSymbol c) { 2710 currentOwner = c; 2711 currentClassFile = c.classfile; 2712 warnedAttrs.clear(); 2713 filling = true; 2714 target = null; 2715 repeatable = null; 2716 try { 2717 bp = 0; 2718 buf = readInputStream(buf, c.classfile.openInputStream()); 2719 readClassBuffer(c); 2720 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 2721 List<Type> missing = missingTypeVariables; 2722 List<Type> found = foundTypeVariables; 2723 missingTypeVariables = List.nil(); 2724 foundTypeVariables = List.nil(); 2725 interimUses = List.nil(); 2726 interimProvides = List.nil(); 2727 filling = false; 2728 ClassType ct = (ClassType)currentOwner.type; 2729 ct.supertype_field = 2730 types.subst(ct.supertype_field, missing, found); 2731 ct.interfaces_field = 2732 types.subst(ct.interfaces_field, missing, found); 2733 ct.typarams_field = 2734 types.substBounds(ct.typarams_field, missing, found); 2735 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) { 2736 types.head.tsym.type = types.head; 2737 } 2738 } else if (missingTypeVariables.isEmpty() != 2739 foundTypeVariables.isEmpty()) { 2740 Name name = missingTypeVariables.head.tsym.name; 2741 throw badClassFile("undecl.type.var", name); 2742 } 2743 2744 if ((c.flags_field & Flags.ANNOTATION) != 0) { 2745 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable))); 2746 } else { 2747 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType()); 2748 } 2749 2750 if (c == currentModule.module_info) { 2751 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) { 2752 Assert.check(currentModule.isCompleted()); 2753 currentModule.usesProvidesCompleter = 2754 new UsesProvidesCompleter(currentModule, interimUses, interimProvides); 2755 } else { 2756 currentModule.uses = List.nil(); 2757 currentModule.provides = List.nil(); 2758 } 2759 } 2760 } catch (IOException | ClosedFileSystemException ex) { 2761 throw badClassFile("unable.to.access.file", ex.toString()); 2762 } catch (ArrayIndexOutOfBoundsException ex) { 2763 throw badClassFile("bad.class.file", c.flatname); 2764 } finally { 2765 interimUses = List.nil(); 2766 interimProvides = List.nil(); 2767 missingTypeVariables = List.nil(); 2768 foundTypeVariables = List.nil(); 2769 filling = false; 2770 } 2771 } 2772 // where 2773 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { 2774 try { 2775 buf = ensureCapacity(buf, s.available()); 2776 int r = s.read(buf); 2777 int bp = 0; 2778 while (r != -1) { 2779 bp += r; 2780 buf = ensureCapacity(buf, bp); 2781 r = s.read(buf, bp, buf.length - bp); 2782 } 2783 return buf; 2784 } finally { 2785 try { 2786 s.close(); 2787 } catch (IOException e) { 2788 /* Ignore any errors, as this stream may have already 2789 * thrown a related exception which is the one that 2790 * should be reported. 2791 */ 2792 } 2793 } 2794 } 2795 /* 2796 * ensureCapacity will increase the buffer as needed, taking note that 2797 * the new buffer will always be greater than the needed and never 2798 * exactly equal to the needed size or bp. If equal then the read (above) 2799 * will infinitely loop as buf.length - bp == 0. 2800 */ 2801 private static byte[] ensureCapacity(byte[] buf, int needed) { 2802 if (buf.length <= needed) { 2803 byte[] old = buf; 2804 buf = new byte[Integer.highestOneBit(needed) << 1]; 2805 System.arraycopy(old, 0, buf, 0, old.length); 2806 } 2807 return buf; 2808 } 2809 2810 /** We can only read a single class file at a time; this 2811 * flag keeps track of when we are currently reading a class 2812 * file. 2813 */ 2814 public boolean filling = false; 2815 2816/************************************************************************ 2817 * Adjusting flags 2818 ***********************************************************************/ 2819 2820 long adjustFieldFlags(long flags) { 2821 return flags; 2822 } 2823 2824 long adjustMethodFlags(long flags) { 2825 if ((flags & ACC_BRIDGE) != 0) { 2826 flags &= ~ACC_BRIDGE; 2827 flags |= BRIDGE; 2828 } 2829 if ((flags & ACC_VARARGS) != 0) { 2830 flags &= ~ACC_VARARGS; 2831 flags |= VARARGS; 2832 } 2833 return flags; 2834 } 2835 2836 long adjustClassFlags(long flags) { 2837 if ((flags & ACC_MODULE) != 0) { 2838 flags &= ~ACC_MODULE; 2839 flags |= MODULE; 2840 } 2841 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded 2842 } 2843 2844 /** 2845 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 2846 * The attribute is only the last component of the original filename, so is unlikely 2847 * to be valid as is, so operations other than those to access the name throw 2848 * UnsupportedOperationException 2849 */ 2850 private static class SourceFileObject implements JavaFileObject { 2851 2852 /** The file's name. 2853 */ 2854 private final Name name; 2855 private final Name flatname; 2856 2857 public SourceFileObject(Name name, Name flatname) { 2858 this.name = name; 2859 this.flatname = flatname; 2860 } 2861 2862 @Override @DefinedBy(Api.COMPILER) 2863 public URI toUri() { 2864 try { 2865 return new URI(null, name.toString(), null); 2866 } catch (URISyntaxException e) { 2867 throw new PathFileObject.CannotCreateUriError(name.toString(), e); 2868 } 2869 } 2870 2871 @Override @DefinedBy(Api.COMPILER) 2872 public String getName() { 2873 return name.toString(); 2874 } 2875 2876 @Override @DefinedBy(Api.COMPILER) 2877 public JavaFileObject.Kind getKind() { 2878 return BaseFileManager.getKind(getName()); 2879 } 2880 2881 @Override @DefinedBy(Api.COMPILER) 2882 public InputStream openInputStream() { 2883 throw new UnsupportedOperationException(); 2884 } 2885 2886 @Override @DefinedBy(Api.COMPILER) 2887 public OutputStream openOutputStream() { 2888 throw new UnsupportedOperationException(); 2889 } 2890 2891 @Override @DefinedBy(Api.COMPILER) 2892 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 2893 throw new UnsupportedOperationException(); 2894 } 2895 2896 @Override @DefinedBy(Api.COMPILER) 2897 public Reader openReader(boolean ignoreEncodingErrors) { 2898 throw new UnsupportedOperationException(); 2899 } 2900 2901 @Override @DefinedBy(Api.COMPILER) 2902 public Writer openWriter() { 2903 throw new UnsupportedOperationException(); 2904 } 2905 2906 @Override @DefinedBy(Api.COMPILER) 2907 public long getLastModified() { 2908 throw new UnsupportedOperationException(); 2909 } 2910 2911 @Override @DefinedBy(Api.COMPILER) 2912 public boolean delete() { 2913 throw new UnsupportedOperationException(); 2914 } 2915 2916 @Override @DefinedBy(Api.COMPILER) 2917 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 2918 return true; // fail-safe mode 2919 } 2920 2921 @Override @DefinedBy(Api.COMPILER) 2922 public NestingKind getNestingKind() { 2923 return null; 2924 } 2925 2926 @Override @DefinedBy(Api.COMPILER) 2927 public Modifier getAccessLevel() { 2928 return null; 2929 } 2930 2931 /** 2932 * Check if two file objects are equal. 2933 * SourceFileObjects are just placeholder objects for the value of a 2934 * SourceFile attribute, and do not directly represent specific files. 2935 * Two SourceFileObjects are equal if their names are equal. 2936 */ 2937 @Override 2938 public boolean equals(Object other) { 2939 if (this == other) 2940 return true; 2941 2942 if (!(other instanceof SourceFileObject)) 2943 return false; 2944 2945 SourceFileObject o = (SourceFileObject) other; 2946 return name.equals(o.name); 2947 } 2948 2949 @Override 2950 public int hashCode() { 2951 return name.hashCode(); 2952 } 2953 } 2954 2955 private class CompleterDeproxy implements AnnotationTypeCompleter { 2956 ClassSymbol proxyOn; 2957 CompoundAnnotationProxy target; 2958 CompoundAnnotationProxy repeatable; 2959 2960 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target, 2961 CompoundAnnotationProxy repeatable) 2962 { 2963 this.proxyOn = c; 2964 this.target = target; 2965 this.repeatable = repeatable; 2966 } 2967 2968 @Override 2969 public void complete(ClassSymbol sym) { 2970 Assert.check(proxyOn == sym); 2971 Attribute.Compound theTarget = null, theRepeatable = null; 2972 AnnotationDeproxy deproxy; 2973 2974 try { 2975 if (target != null) { 2976 deproxy = new AnnotationDeproxy(proxyOn); 2977 theTarget = deproxy.deproxyCompound(target); 2978 } 2979 2980 if (repeatable != null) { 2981 deproxy = new AnnotationDeproxy(proxyOn); 2982 theRepeatable = deproxy.deproxyCompound(repeatable); 2983 } 2984 } catch (Exception e) { 2985 throw new CompletionFailure(sym, ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage()))); 2986 } 2987 2988 sym.getAnnotationTypeMetadata().setTarget(theTarget); 2989 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable); 2990 } 2991 } 2992 2993 private class ProxyType extends Type { 2994 2995 private final byte[] content; 2996 2997 public ProxyType(byte[] content) { 2998 super(syms.noSymbol, TypeMetadata.EMPTY); 2999 this.content = content; 3000 } 3001 3002 @Override 3003 public TypeTag getTag() { 3004 return TypeTag.NONE; 3005 } 3006 3007 @Override 3008 public Type cloneWithMetadata(TypeMetadata metadata) { 3009 throw new UnsupportedOperationException(); 3010 } 3011 3012 public Type resolve() { 3013 return sigToType(content, 0, content.length); 3014 } 3015 3016 @Override @DefinedBy(Api.LANGUAGE_MODEL) 3017 public String toString() { 3018 return "<ProxyType>"; 3019 } 3020 3021 } 3022 3023 private static final class InterimUsesDirective { 3024 public final Name service; 3025 3026 public InterimUsesDirective(Name service) { 3027 this.service = service; 3028 } 3029 3030 } 3031 3032 private static final class InterimProvidesDirective { 3033 public final Name service; 3034 public final List<Name> impls; 3035 3036 public InterimProvidesDirective(Name service, List<Name> impls) { 3037 this.service = service; 3038 this.impls = impls; 3039 } 3040 3041 } 3042 3043 private final class UsesProvidesCompleter implements Completer { 3044 private final ModuleSymbol currentModule; 3045 private final List<InterimUsesDirective> interimUsesCopy; 3046 private final List<InterimProvidesDirective> interimProvidesCopy; 3047 3048 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) { 3049 this.currentModule = currentModule; 3050 this.interimUsesCopy = interimUsesCopy; 3051 this.interimProvidesCopy = interimProvidesCopy; 3052 } 3053 3054 @Override 3055 public void complete(Symbol sym) throws CompletionFailure { 3056 ListBuffer<Directive> directives = new ListBuffer<>(); 3057 directives.addAll(currentModule.directives); 3058 ListBuffer<UsesDirective> uses = new ListBuffer<>(); 3059 for (InterimUsesDirective interim : interimUsesCopy) { 3060 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service)); 3061 uses.add(d); 3062 directives.add(d); 3063 } 3064 currentModule.uses = uses.toList(); 3065 ListBuffer<ProvidesDirective> provides = new ListBuffer<>(); 3066 for (InterimProvidesDirective interim : interimProvidesCopy) { 3067 ListBuffer<ClassSymbol> impls = new ListBuffer<>(); 3068 for (Name impl : interim.impls) { 3069 impls.append(syms.enterClass(currentModule, impl)); 3070 } 3071 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service), 3072 impls.toList()); 3073 provides.add(d); 3074 directives.add(d); 3075 } 3076 currentModule.provides = provides.toList(); 3077 currentModule.directives = directives.toList(); 3078 } 3079 } 3080} 3081