ClassReader.java revision 3589:b27ce9a1374e
1/* 2 * Copyright (c) 1999, 2016, 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.util.Arrays; 33import java.util.EnumSet; 34import java.util.HashMap; 35import java.util.HashSet; 36import java.util.Map; 37import java.util.Set; 38 39import javax.lang.model.element.Modifier; 40import javax.lang.model.element.NestingKind; 41import javax.tools.JavaFileManager; 42import javax.tools.JavaFileObject; 43 44import com.sun.tools.javac.comp.Annotate; 45import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter; 46import com.sun.tools.javac.code.*; 47import com.sun.tools.javac.code.Directive.*; 48import com.sun.tools.javac.code.Lint.LintCategory; 49import com.sun.tools.javac.code.Scope.WriteableScope; 50import com.sun.tools.javac.code.Symbol.*; 51import com.sun.tools.javac.code.Symtab; 52import com.sun.tools.javac.code.Type.*; 53import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata; 54import com.sun.tools.javac.file.BaseFileManager; 55import com.sun.tools.javac.file.PathFileObject; 56import com.sun.tools.javac.jvm.ClassFile.NameAndType; 57import com.sun.tools.javac.jvm.ClassFile.Version; 58import com.sun.tools.javac.main.Option; 59import com.sun.tools.javac.util.*; 60import com.sun.tools.javac.util.DefinedBy.Api; 61import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 62 63import static com.sun.tools.javac.code.Flags.*; 64import static com.sun.tools.javac.code.Kinds.Kind.*; 65import static com.sun.tools.javac.code.TypeTag.ARRAY; 66import static com.sun.tools.javac.code.TypeTag.CLASS; 67import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 68import static com.sun.tools.javac.jvm.ClassFile.*; 69import static com.sun.tools.javac.jvm.ClassFile.Version.*; 70 71import static com.sun.tools.javac.main.Option.PARAMETERS; 72 73/** This class provides operations to read a classfile into an internal 74 * representation. The internal representation is anchored in a 75 * ClassSymbol which contains in its scope symbol representations 76 * for all other definitions in the classfile. Top-level Classes themselves 77 * appear as members of the scopes of PackageSymbols. 78 * 79 * <p><b>This is NOT part of any supported API. 80 * If you write code that depends on this, you do so at your own risk. 81 * This code and its internal interfaces are subject to change or 82 * deletion without notice.</b> 83 */ 84public class ClassReader { 85 /** The context key for the class reader. */ 86 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 87 88 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 89 90 private final Annotate annotate; 91 92 /** Switch: verbose output. 93 */ 94 boolean verbose; 95 96 /** Switch: read constant pool and code sections. This switch is initially 97 * set to false but can be turned on from outside. 98 */ 99 public boolean readAllOfClassFile = false; 100 101 /** Switch: allow simplified varargs. 102 */ 103 boolean allowSimplifiedVarargs; 104 105 /** Switch: allow modules. 106 */ 107 boolean allowModules; 108 109 /** Lint option: warn about classfile issues 110 */ 111 boolean lintClassfile; 112 113 /** Switch: preserve parameter names from the variable table. 114 */ 115 public boolean saveParameterNames; 116 117 /** 118 * The currently selected profile. 119 */ 120 public final Profile profile; 121 122 /** The log to use for verbose output 123 */ 124 final Log log; 125 126 /** The symbol table. */ 127 Symtab syms; 128 129 Types types; 130 131 /** The name table. */ 132 final Names names; 133 134 /** Access to files 135 */ 136 private final JavaFileManager fileManager; 137 138 /** Factory for diagnostics 139 */ 140 JCDiagnostic.Factory diagFactory; 141 142 /** The current scope where type variables are entered. 143 */ 144 protected WriteableScope typevars; 145 146 private List<InterimUsesDirective> interimUses = List.nil(); 147 private List<InterimProvidesDirective> interimProvides = List.nil(); 148 149 /** The path name of the class file currently being read. 150 */ 151 protected JavaFileObject currentClassFile = null; 152 153 /** The class or method currently being read. 154 */ 155 protected Symbol currentOwner = null; 156 157 /** The module containing the class currently being read. 158 */ 159 protected ModuleSymbol currentModule = null; 160 161 /** The buffer containing the currently read class file. 162 */ 163 byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 164 165 /** The current input pointer. 166 */ 167 protected int bp; 168 169 /** The objects of the constant pool. 170 */ 171 Object[] poolObj; 172 173 /** For every constant pool entry, an index into buf where the 174 * defining section of the entry is found. 175 */ 176 int[] poolIdx; 177 178 /** The major version number of the class file being read. */ 179 int majorVersion; 180 /** The minor version number of the class file being read. */ 181 int minorVersion; 182 183 /** A table to hold the constant pool indices for method parameter 184 * names, as given in LocalVariableTable attributes. 185 */ 186 int[] parameterNameIndices; 187 188 /** 189 * Whether or not any parameter names have been found. 190 */ 191 boolean haveParameterNameIndices; 192 193 /** Set this to false every time we start reading a method 194 * and are saving parameter names. Set it to true when we see 195 * MethodParameters, if it's set when we see a LocalVariableTable, 196 * then we ignore the parameter names from the LVT. 197 */ 198 boolean sawMethodParameters; 199 200 /** 201 * The set of attribute names for which warnings have been generated for the current class 202 */ 203 Set<Name> warnedAttrs = new HashSet<>(); 204 205 /** 206 * The prototype @Target Attribute.Compound if this class is an annotation annotated with 207 * @Target 208 */ 209 CompoundAnnotationProxy target; 210 211 /** 212 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with 213 * @Repeatable 214 */ 215 CompoundAnnotationProxy repeatable; 216 217 /** Get the ClassReader instance for this invocation. */ 218 public static ClassReader instance(Context context) { 219 ClassReader instance = context.get(classReaderKey); 220 if (instance == null) 221 instance = new ClassReader(context); 222 return instance; 223 } 224 225 /** Construct a new class reader. */ 226 protected ClassReader(Context context) { 227 context.put(classReaderKey, this); 228 annotate = Annotate.instance(context); 229 names = Names.instance(context); 230 syms = Symtab.instance(context); 231 types = Types.instance(context); 232 fileManager = context.get(JavaFileManager.class); 233 if (fileManager == null) 234 throw new AssertionError("FileManager initialization error"); 235 diagFactory = JCDiagnostic.Factory.instance(context); 236 237 log = Log.instance(context); 238 239 Options options = Options.instance(context); 240 verbose = options.isSet(Option.VERBOSE); 241 242 Source source = Source.instance(context); 243 allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 244 allowModules = source.allowModules(); 245 246 saveParameterNames = options.isSet(PARAMETERS); 247 248 profile = Profile.instance(context); 249 250 typevars = WriteableScope.create(syms.noSymbol); 251 252 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 253 254 initAttributeReaders(); 255 } 256 257 /** Add member to class unless it is synthetic. 258 */ 259 private void enterMember(ClassSymbol c, Symbol sym) { 260 // Synthetic members are not entered -- reason lost to history (optimization?). 261 // Lambda methods must be entered because they may have inner classes (which reference them) 262 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 263 c.members_field.enter(sym); 264 } 265 266/************************************************************************ 267 * Error Diagnoses 268 ***********************************************************************/ 269 270 public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 271 return new ClassFinder.BadClassFile ( 272 currentOwner.enclClass(), 273 currentClassFile, 274 diagFactory.fragment(key, args), 275 diagFactory); 276 } 277 278 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Object... args) { 279 return new ClassFinder.BadEnclosingMethodAttr ( 280 currentOwner.enclClass(), 281 currentClassFile, 282 diagFactory.fragment("bad.enclosing.method", args), 283 diagFactory); 284 } 285 286/************************************************************************ 287 * Buffer Access 288 ***********************************************************************/ 289 290 /** Read a character. 291 */ 292 char nextChar() { 293 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 294 } 295 296 /** Read a byte. 297 */ 298 int nextByte() { 299 return buf[bp++] & 0xFF; 300 } 301 302 /** Read an integer. 303 */ 304 int nextInt() { 305 return 306 ((buf[bp++] & 0xFF) << 24) + 307 ((buf[bp++] & 0xFF) << 16) + 308 ((buf[bp++] & 0xFF) << 8) + 309 (buf[bp++] & 0xFF); 310 } 311 312 /** Extract a character at position bp from buf. 313 */ 314 char getChar(int bp) { 315 return 316 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 317 } 318 319 /** Extract an integer at position bp from buf. 320 */ 321 int getInt(int bp) { 322 return 323 ((buf[bp] & 0xFF) << 24) + 324 ((buf[bp+1] & 0xFF) << 16) + 325 ((buf[bp+2] & 0xFF) << 8) + 326 (buf[bp+3] & 0xFF); 327 } 328 329 330 /** Extract a long integer at position bp from buf. 331 */ 332 long getLong(int bp) { 333 DataInputStream bufin = 334 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 335 try { 336 return bufin.readLong(); 337 } catch (IOException e) { 338 throw new AssertionError(e); 339 } 340 } 341 342 /** Extract a float at position bp from buf. 343 */ 344 float getFloat(int bp) { 345 DataInputStream bufin = 346 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 347 try { 348 return bufin.readFloat(); 349 } catch (IOException e) { 350 throw new AssertionError(e); 351 } 352 } 353 354 /** Extract a double at position bp from buf. 355 */ 356 double getDouble(int bp) { 357 DataInputStream bufin = 358 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 359 try { 360 return bufin.readDouble(); 361 } catch (IOException e) { 362 throw new AssertionError(e); 363 } 364 } 365 366/************************************************************************ 367 * Constant Pool Access 368 ***********************************************************************/ 369 370 /** Index all constant pool entries, writing their start addresses into 371 * poolIdx. 372 */ 373 void indexPool() { 374 poolIdx = new int[nextChar()]; 375 poolObj = new Object[poolIdx.length]; 376 int i = 1; 377 while (i < poolIdx.length) { 378 poolIdx[i++] = bp; 379 byte tag = buf[bp++]; 380 switch (tag) { 381 case CONSTANT_Utf8: case CONSTANT_Unicode: { 382 int len = nextChar(); 383 bp = bp + len; 384 break; 385 } 386 case CONSTANT_Class: 387 case CONSTANT_String: 388 case CONSTANT_MethodType: 389 bp = bp + 2; 390 break; 391 case CONSTANT_MethodHandle: 392 bp = bp + 3; 393 break; 394 case CONSTANT_Fieldref: 395 case CONSTANT_Methodref: 396 case CONSTANT_InterfaceMethodref: 397 case CONSTANT_NameandType: 398 case CONSTANT_Integer: 399 case CONSTANT_Float: 400 case CONSTANT_InvokeDynamic: 401 bp = bp + 4; 402 break; 403 case CONSTANT_Long: 404 case CONSTANT_Double: 405 bp = bp + 8; 406 i++; 407 break; 408 default: 409 throw badClassFile("bad.const.pool.tag.at", 410 Byte.toString(tag), 411 Integer.toString(bp -1)); 412 } 413 } 414 } 415 416 /** Read constant pool entry at start address i, use pool as a cache. 417 */ 418 Object readPool(int i) { 419 Object result = poolObj[i]; 420 if (result != null) return result; 421 422 int index = poolIdx[i]; 423 if (index == 0) return null; 424 425 byte tag = buf[index]; 426 switch (tag) { 427 case CONSTANT_Utf8: 428 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 429 break; 430 case CONSTANT_Unicode: 431 throw badClassFile("unicode.str.not.supported"); 432 case CONSTANT_Class: 433 poolObj[i] = readClassOrType(getChar(index + 1)); 434 break; 435 case CONSTANT_String: 436 // FIXME: (footprint) do not use toString here 437 poolObj[i] = readName(getChar(index + 1)).toString(); 438 break; 439 case CONSTANT_Fieldref: { 440 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 441 NameAndType nt = readNameAndType(getChar(index + 3)); 442 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 443 break; 444 } 445 case CONSTANT_Methodref: 446 case CONSTANT_InterfaceMethodref: { 447 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 448 NameAndType nt = readNameAndType(getChar(index + 3)); 449 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 450 break; 451 } 452 case CONSTANT_NameandType: 453 poolObj[i] = new NameAndType( 454 readName(getChar(index + 1)), 455 readType(getChar(index + 3)), types); 456 break; 457 case CONSTANT_Integer: 458 poolObj[i] = getInt(index + 1); 459 break; 460 case CONSTANT_Float: 461 poolObj[i] = Float.valueOf(getFloat(index + 1)); 462 break; 463 case CONSTANT_Long: 464 poolObj[i] = Long.valueOf(getLong(index + 1)); 465 break; 466 case CONSTANT_Double: 467 poolObj[i] = Double.valueOf(getDouble(index + 1)); 468 break; 469 case CONSTANT_MethodHandle: 470 skipBytes(4); 471 break; 472 case CONSTANT_MethodType: 473 skipBytes(3); 474 break; 475 case CONSTANT_InvokeDynamic: 476 skipBytes(5); 477 break; 478 default: 479 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 480 } 481 return poolObj[i]; 482 } 483 484 /** Read signature and convert to type. 485 */ 486 Type readType(int i) { 487 int index = poolIdx[i]; 488 return sigToType(buf, index + 3, getChar(index + 1)); 489 } 490 491 /** If name is an array type or class signature, return the 492 * corresponding type; otherwise return a ClassSymbol with given name. 493 */ 494 Object readClassOrType(int i) { 495 int index = poolIdx[i]; 496 int len = getChar(index + 1); 497 int start = index + 3; 498 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 499 // by the above assertion, the following test can be 500 // simplified to (buf[start] == '[') 501 return (buf[start] == '[' || buf[start + len - 1] == ';') 502 ? (Object)sigToType(buf, start, len) 503 : (Object)enterClass(names.fromUtf(internalize(buf, start, 504 len))); 505 } 506 507 /** Read signature and convert to type parameters. 508 */ 509 List<Type> readTypeParams(int i) { 510 int index = poolIdx[i]; 511 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 512 } 513 514 /** Read class entry. 515 */ 516 ClassSymbol readClassSymbol(int i) { 517 Object obj = readPool(i); 518 if (obj != null && !(obj instanceof ClassSymbol)) 519 throw badClassFile("bad.const.pool.entry", 520 currentClassFile.toString(), 521 "CONSTANT_Class_info", i); 522 return (ClassSymbol)obj; 523 } 524 525 Name readClassName(int i) { 526 int index = poolIdx[i]; 527 if (index == 0) return null; 528 byte tag = buf[index]; 529 if (tag != CONSTANT_Class) { 530 throw badClassFile("bad.const.pool.entry", 531 currentClassFile.toString(), 532 "CONSTANT_Class_info", i); 533 } 534 int nameIndex = poolIdx[getChar(index + 1)]; 535 int len = getChar(nameIndex + 1); 536 int start = nameIndex + 3; 537 if (buf[start] == '[' || buf[start + len - 1] == ';') 538 throw badClassFile("wrong class name"); //TODO: proper diagnostics 539 return names.fromUtf(internalize(buf, start, len)); 540 } 541 542 /** Read name. 543 */ 544 Name readName(int i) { 545 Object obj = readPool(i); 546 if (obj != null && !(obj instanceof Name)) 547 throw badClassFile("bad.const.pool.entry", 548 currentClassFile.toString(), 549 "CONSTANT_Utf8_info or CONSTANT_String_info", i); 550 return (Name)obj; 551 } 552 553 /** Read name and type. 554 */ 555 NameAndType readNameAndType(int i) { 556 Object obj = readPool(i); 557 if (obj != null && !(obj instanceof NameAndType)) 558 throw badClassFile("bad.const.pool.entry", 559 currentClassFile.toString(), 560 "CONSTANT_NameAndType_info", i); 561 return (NameAndType)obj; 562 } 563 564 /** Read the class name of a module-info.class file. 565 * The name is stored in a CONSTANT_Class entry, where the 566 * class name is of the form module-name.module-info. 567 */ 568 Name readModuleInfoName(int i) { 569 if (majorVersion < Version.V53.major) { 570 throw badClassFile("anachronistic.module.info", 571 Integer.toString(majorVersion), 572 Integer.toString(minorVersion)); 573 } 574 int classIndex = poolIdx[i]; 575 if (buf[classIndex] == CONSTANT_Class) { 576 int utf8Index = poolIdx[getChar(classIndex + 1)]; 577 if (buf[utf8Index] == CONSTANT_Utf8) { 578 int len = getChar(utf8Index + 1); 579 int start = utf8Index + 3; 580 return names.fromUtf(internalize(buf, start, len)); 581 } 582 } 583 throw badClassFile("bad.module-info.name"); 584 } 585 586 /** Read requires_flags. 587 */ 588 Set<RequiresFlag> readRequiresFlags(int flags) { 589 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class); 590 for (RequiresFlag f: RequiresFlag.values()) { 591 if ((flags & f.value) != 0) 592 set.add(f); 593 } 594 return set; 595 } 596 597/************************************************************************ 598 * Reading Types 599 ***********************************************************************/ 600 601 /** The unread portion of the currently read type is 602 * signature[sigp..siglimit-1]. 603 */ 604 byte[] signature; 605 int sigp; 606 int siglimit; 607 boolean sigEnterPhase = false; 608 609 /** Convert signature to type, where signature is a byte array segment. 610 */ 611 Type sigToType(byte[] sig, int offset, int len) { 612 signature = sig; 613 sigp = offset; 614 siglimit = offset + len; 615 return sigToType(); 616 } 617 618 /** Convert signature to type, where signature is implicit. 619 */ 620 Type sigToType() { 621 switch ((char) signature[sigp]) { 622 case 'T': 623 sigp++; 624 int start = sigp; 625 while (signature[sigp] != ';') sigp++; 626 sigp++; 627 return sigEnterPhase 628 ? Type.noType 629 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 630 case '+': { 631 sigp++; 632 Type t = sigToType(); 633 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 634 } 635 case '*': 636 sigp++; 637 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 638 syms.boundClass); 639 case '-': { 640 sigp++; 641 Type t = sigToType(); 642 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 643 } 644 case 'B': 645 sigp++; 646 return syms.byteType; 647 case 'C': 648 sigp++; 649 return syms.charType; 650 case 'D': 651 sigp++; 652 return syms.doubleType; 653 case 'F': 654 sigp++; 655 return syms.floatType; 656 case 'I': 657 sigp++; 658 return syms.intType; 659 case 'J': 660 sigp++; 661 return syms.longType; 662 case 'L': 663 { 664 // int oldsigp = sigp; 665 Type t = classSigToType(); 666 if (sigp < siglimit && signature[sigp] == '.') 667 throw badClassFile("deprecated inner class signature syntax " + 668 "(please recompile from source)"); 669 /* 670 System.err.println(" decoded " + 671 new String(signature, oldsigp, sigp-oldsigp) + 672 " => " + t + " outer " + t.outer()); 673 */ 674 return t; 675 } 676 case 'S': 677 sigp++; 678 return syms.shortType; 679 case 'V': 680 sigp++; 681 return syms.voidType; 682 case 'Z': 683 sigp++; 684 return syms.booleanType; 685 case '[': 686 sigp++; 687 return new ArrayType(sigToType(), syms.arrayClass); 688 case '(': 689 sigp++; 690 List<Type> argtypes = sigToTypes(')'); 691 Type restype = sigToType(); 692 List<Type> thrown = List.nil(); 693 while (signature[sigp] == '^') { 694 sigp++; 695 thrown = thrown.prepend(sigToType()); 696 } 697 // if there is a typevar in the throws clause we should state it. 698 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 699 if (l.head.hasTag(TYPEVAR)) { 700 l.head.tsym.flags_field |= THROWS; 701 } 702 } 703 return new MethodType(argtypes, 704 restype, 705 thrown.reverse(), 706 syms.methodClass); 707 case '<': 708 typevars = typevars.dup(currentOwner); 709 Type poly = new ForAll(sigToTypeParams(), sigToType()); 710 typevars = typevars.leave(); 711 return poly; 712 default: 713 throw badClassFile("bad.signature", 714 Convert.utf2string(signature, sigp, 10)); 715 } 716 } 717 718 byte[] signatureBuffer = new byte[0]; 719 int sbp = 0; 720 /** Convert class signature to type, where signature is implicit. 721 */ 722 Type classSigToType() { 723 if (signature[sigp] != 'L') 724 throw badClassFile("bad.class.signature", 725 Convert.utf2string(signature, sigp, 10)); 726 sigp++; 727 Type outer = Type.noType; 728 int startSbp = sbp; 729 730 while (true) { 731 final byte c = signature[sigp++]; 732 switch (c) { 733 734 case ';': { // end 735 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 736 startSbp, 737 sbp - startSbp)); 738 739 try { 740 return (outer == Type.noType) ? 741 t.erasure(types) : 742 new ClassType(outer, List.<Type>nil(), t); 743 } finally { 744 sbp = startSbp; 745 } 746 } 747 748 case '<': // generic arguments 749 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 750 startSbp, 751 sbp - startSbp)); 752 outer = new ClassType(outer, sigToTypes('>'), t) { 753 boolean completed = false; 754 @Override @DefinedBy(Api.LANGUAGE_MODEL) 755 public Type getEnclosingType() { 756 if (!completed) { 757 completed = true; 758 tsym.complete(); 759 Type enclosingType = tsym.type.getEnclosingType(); 760 if (enclosingType != Type.noType) { 761 List<Type> typeArgs = 762 super.getEnclosingType().allparams(); 763 List<Type> typeParams = 764 enclosingType.allparams(); 765 if (typeParams.length() != typeArgs.length()) { 766 // no "rare" types 767 super.setEnclosingType(types.erasure(enclosingType)); 768 } else { 769 super.setEnclosingType(types.subst(enclosingType, 770 typeParams, 771 typeArgs)); 772 } 773 } else { 774 super.setEnclosingType(Type.noType); 775 } 776 } 777 return super.getEnclosingType(); 778 } 779 @Override 780 public void setEnclosingType(Type outer) { 781 throw new UnsupportedOperationException(); 782 } 783 }; 784 switch (signature[sigp++]) { 785 case ';': 786 if (sigp < signature.length && signature[sigp] == '.') { 787 // support old-style GJC signatures 788 // The signature produced was 789 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 790 // rather than say 791 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 792 // so we skip past ".Lfoo/Outer$" 793 sigp += (sbp - startSbp) + // "foo/Outer" 794 3; // ".L" and "$" 795 signatureBuffer[sbp++] = (byte)'$'; 796 break; 797 } else { 798 sbp = startSbp; 799 return outer; 800 } 801 case '.': 802 signatureBuffer[sbp++] = (byte)'$'; 803 break; 804 default: 805 throw new AssertionError(signature[sigp-1]); 806 } 807 continue; 808 809 case '.': 810 //we have seen an enclosing non-generic class 811 if (outer != Type.noType) { 812 t = enterClass(names.fromUtf(signatureBuffer, 813 startSbp, 814 sbp - startSbp)); 815 outer = new ClassType(outer, List.<Type>nil(), t); 816 } 817 signatureBuffer[sbp++] = (byte)'$'; 818 continue; 819 case '/': 820 signatureBuffer[sbp++] = (byte)'.'; 821 continue; 822 default: 823 signatureBuffer[sbp++] = c; 824 continue; 825 } 826 } 827 } 828 829 /** Convert (implicit) signature to list of types 830 * until `terminator' is encountered. 831 */ 832 List<Type> sigToTypes(char terminator) { 833 List<Type> head = List.of(null); 834 List<Type> tail = head; 835 while (signature[sigp] != terminator) 836 tail = tail.setTail(List.of(sigToType())); 837 sigp++; 838 return head.tail; 839 } 840 841 /** Convert signature to type parameters, where signature is a byte 842 * array segment. 843 */ 844 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 845 signature = sig; 846 sigp = offset; 847 siglimit = offset + len; 848 return sigToTypeParams(); 849 } 850 851 /** Convert signature to type parameters, where signature is implicit. 852 */ 853 List<Type> sigToTypeParams() { 854 List<Type> tvars = List.nil(); 855 if (signature[sigp] == '<') { 856 sigp++; 857 int start = sigp; 858 sigEnterPhase = true; 859 while (signature[sigp] != '>') 860 tvars = tvars.prepend(sigToTypeParam()); 861 sigEnterPhase = false; 862 sigp = start; 863 while (signature[sigp] != '>') 864 sigToTypeParam(); 865 sigp++; 866 } 867 return tvars.reverse(); 868 } 869 870 /** Convert (implicit) signature to type parameter. 871 */ 872 Type sigToTypeParam() { 873 int start = sigp; 874 while (signature[sigp] != ':') sigp++; 875 Name name = names.fromUtf(signature, start, sigp - start); 876 TypeVar tvar; 877 if (sigEnterPhase) { 878 tvar = new TypeVar(name, currentOwner, syms.botType); 879 typevars.enter(tvar.tsym); 880 } else { 881 tvar = (TypeVar)findTypeVar(name); 882 } 883 List<Type> bounds = List.nil(); 884 boolean allInterfaces = false; 885 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 886 sigp++; 887 allInterfaces = true; 888 } 889 while (signature[sigp] == ':') { 890 sigp++; 891 bounds = bounds.prepend(sigToType()); 892 } 893 if (!sigEnterPhase) { 894 types.setBounds(tvar, bounds.reverse(), allInterfaces); 895 } 896 return tvar; 897 } 898 899 /** Find type variable with given name in `typevars' scope. 900 */ 901 Type findTypeVar(Name name) { 902 Symbol s = typevars.findFirst(name); 903 if (s != null) { 904 return s.type; 905 } else { 906 if (readingClassAttr) { 907 // While reading the class attribute, the supertypes 908 // might refer to a type variable from an enclosing element 909 // (method or class). 910 // If the type variable is defined in the enclosing class, 911 // we can actually find it in 912 // currentOwner.owner.type.getTypeArguments() 913 // However, until we have read the enclosing method attribute 914 // we don't know for sure if this owner is correct. It could 915 // be a method and there is no way to tell before reading the 916 // enclosing method attribute. 917 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 918 missingTypeVariables = missingTypeVariables.prepend(t); 919 // System.err.println("Missing type var " + name); 920 return t; 921 } 922 throw badClassFile("undecl.type.var", name); 923 } 924 } 925 926/************************************************************************ 927 * Reading Attributes 928 ***********************************************************************/ 929 930 protected enum AttributeKind { CLASS, MEMBER } 931 932 protected abstract class AttributeReader { 933 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 934 this.name = name; 935 this.version = version; 936 this.kinds = kinds; 937 } 938 939 protected boolean accepts(AttributeKind kind) { 940 if (kinds.contains(kind)) { 941 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 942 return true; 943 944 if (lintClassfile && !warnedAttrs.contains(name)) { 945 JavaFileObject prev = log.useSource(currentClassFile); 946 try { 947 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr", 948 name, version.major, version.minor, majorVersion, minorVersion); 949 } finally { 950 log.useSource(prev); 951 } 952 warnedAttrs.add(name); 953 } 954 } 955 return false; 956 } 957 958 protected abstract void read(Symbol sym, int attrLen); 959 960 protected final Name name; 961 protected final ClassFile.Version version; 962 protected final Set<AttributeKind> kinds; 963 } 964 965 protected Set<AttributeKind> CLASS_ATTRIBUTE = 966 EnumSet.of(AttributeKind.CLASS); 967 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 968 EnumSet.of(AttributeKind.MEMBER); 969 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 970 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 971 972 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 973 974 private void initAttributeReaders() { 975 AttributeReader[] readers = { 976 // v45.3 attributes 977 978 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 979 protected void read(Symbol sym, int attrLen) { 980 if (readAllOfClassFile || saveParameterNames) 981 ((MethodSymbol)sym).code = readCode(sym); 982 else 983 bp = bp + attrLen; 984 } 985 }, 986 987 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 988 protected void read(Symbol sym, int attrLen) { 989 Object v = readPool(nextChar()); 990 // Ignore ConstantValue attribute if field not final. 991 if ((sym.flags() & FINAL) != 0) 992 ((VarSymbol) sym).setData(v); 993 } 994 }, 995 996 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 997 protected void read(Symbol sym, int attrLen) { 998 sym.flags_field |= DEPRECATED; 999 } 1000 }, 1001 1002 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1003 protected void read(Symbol sym, int attrLen) { 1004 int nexceptions = nextChar(); 1005 List<Type> thrown = List.nil(); 1006 for (int j = 0; j < nexceptions; j++) 1007 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 1008 if (sym.type.getThrownTypes().isEmpty()) 1009 sym.type.asMethodType().thrown = thrown.reverse(); 1010 } 1011 }, 1012 1013 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 1014 protected void read(Symbol sym, int attrLen) { 1015 ClassSymbol c = (ClassSymbol) sym; 1016 if (currentModule.module_info == c) { 1017 //prevent entering the classes too soon: 1018 skipInnerClasses(); 1019 } else { 1020 readInnerClasses(c); 1021 } 1022 } 1023 }, 1024 1025 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1026 protected void read(Symbol sym, int attrLen) { 1027 int newbp = bp + attrLen; 1028 if (saveParameterNames && !sawMethodParameters) { 1029 // Pick up parameter names from the variable table. 1030 // Parameter names are not explicitly identified as such, 1031 // but all parameter name entries in the LocalVariableTable 1032 // have a start_pc of 0. Therefore, we record the name 1033 // indicies of all slots with a start_pc of zero in the 1034 // parameterNameIndicies array. 1035 // Note that this implicitly honors the JVMS spec that 1036 // there may be more than one LocalVariableTable, and that 1037 // there is no specified ordering for the entries. 1038 int numEntries = nextChar(); 1039 for (int i = 0; i < numEntries; i++) { 1040 int start_pc = nextChar(); 1041 int length = nextChar(); 1042 int nameIndex = nextChar(); 1043 int sigIndex = nextChar(); 1044 int register = nextChar(); 1045 if (start_pc == 0) { 1046 // ensure array large enough 1047 if (register >= parameterNameIndices.length) { 1048 int newSize = 1049 Math.max(register + 1, parameterNameIndices.length + 8); 1050 parameterNameIndices = 1051 Arrays.copyOf(parameterNameIndices, newSize); 1052 } 1053 parameterNameIndices[register] = nameIndex; 1054 haveParameterNameIndices = true; 1055 } 1056 } 1057 } 1058 bp = newbp; 1059 } 1060 }, 1061 1062 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1063 protected void read(Symbol sym, int attrLen) { 1064 ClassSymbol c = (ClassSymbol) sym; 1065 Name n = readName(nextChar()); 1066 c.sourcefile = new SourceFileObject(n, c.flatname); 1067 // If the class is a toplevel class, originating from a Java source file, 1068 // but the class name does not match the file name, then it is 1069 // an auxiliary class. 1070 String sn = n.toString(); 1071 if (c.owner.kind == PCK && 1072 sn.endsWith(".java") && 1073 !sn.equals(c.name.toString()+".java")) { 1074 c.flags_field |= AUXILIARY; 1075 } 1076 } 1077 }, 1078 1079 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1080 protected void read(Symbol sym, int attrLen) { 1081 sym.flags_field |= SYNTHETIC; 1082 } 1083 }, 1084 1085 // standard v49 attributes 1086 1087 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1088 protected void read(Symbol sym, int attrLen) { 1089 int newbp = bp + attrLen; 1090 readEnclosingMethodAttr(sym); 1091 bp = newbp; 1092 } 1093 }, 1094 1095 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1096 protected void read(Symbol sym, int attrLen) { 1097 if (sym.kind == TYP) { 1098 ClassSymbol c = (ClassSymbol) sym; 1099 readingClassAttr = true; 1100 try { 1101 ClassType ct1 = (ClassType)c.type; 1102 Assert.check(c == currentOwner); 1103 ct1.typarams_field = readTypeParams(nextChar()); 1104 ct1.supertype_field = sigToType(); 1105 ListBuffer<Type> is = new ListBuffer<>(); 1106 while (sigp != siglimit) is.append(sigToType()); 1107 ct1.interfaces_field = is.toList(); 1108 } finally { 1109 readingClassAttr = false; 1110 } 1111 } else { 1112 List<Type> thrown = sym.type.getThrownTypes(); 1113 sym.type = readType(nextChar()); 1114 //- System.err.println(" # " + sym.type); 1115 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1116 sym.type.asMethodType().thrown = thrown; 1117 1118 } 1119 } 1120 }, 1121 1122 // v49 annotation attributes 1123 1124 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1125 protected void read(Symbol sym, int attrLen) { 1126 attachAnnotationDefault(sym); 1127 } 1128 }, 1129 1130 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1131 protected void read(Symbol sym, int attrLen) { 1132 attachAnnotations(sym); 1133 } 1134 }, 1135 1136 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1137 protected void read(Symbol sym, int attrLen) { 1138 attachParameterAnnotations(sym); 1139 } 1140 }, 1141 1142 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1143 protected void read(Symbol sym, int attrLen) { 1144 attachAnnotations(sym); 1145 } 1146 }, 1147 1148 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1149 protected void read(Symbol sym, int attrLen) { 1150 attachParameterAnnotations(sym); 1151 } 1152 }, 1153 1154 // additional "legacy" v49 attributes, superceded by flags 1155 1156 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1157 protected void read(Symbol sym, int attrLen) { 1158 sym.flags_field |= ANNOTATION; 1159 } 1160 }, 1161 1162 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1163 protected void read(Symbol sym, int attrLen) { 1164 sym.flags_field |= BRIDGE; 1165 } 1166 }, 1167 1168 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1169 protected void read(Symbol sym, int attrLen) { 1170 sym.flags_field |= ENUM; 1171 } 1172 }, 1173 1174 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1175 protected void read(Symbol sym, int attrLen) { 1176 sym.flags_field |= VARARGS; 1177 } 1178 }, 1179 1180 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1181 protected void read(Symbol sym, int attrLen) { 1182 attachTypeAnnotations(sym); 1183 } 1184 }, 1185 1186 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1187 protected void read(Symbol sym, int attrLen) { 1188 attachTypeAnnotations(sym); 1189 } 1190 }, 1191 1192 // The following attributes for a Code attribute are not currently handled 1193 // StackMapTable 1194 // SourceDebugExtension 1195 // LineNumberTable 1196 // LocalVariableTypeTable 1197 1198 // standard v52 attributes 1199 1200 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1201 protected void read(Symbol sym, int attrlen) { 1202 int newbp = bp + attrlen; 1203 if (saveParameterNames) { 1204 sawMethodParameters = true; 1205 int numEntries = nextByte(); 1206 parameterNameIndices = new int[numEntries]; 1207 haveParameterNameIndices = true; 1208 for (int i = 0; i < numEntries; i++) { 1209 int nameIndex = nextChar(); 1210 int flags = nextChar(); 1211 parameterNameIndices[i] = nameIndex; 1212 } 1213 } 1214 bp = newbp; 1215 } 1216 }, 1217 1218 // standard v53 attributes 1219 1220 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) { 1221 @Override 1222 protected boolean accepts(AttributeKind kind) { 1223 return super.accepts(kind) && allowModules; 1224 } 1225 protected void read(Symbol sym, int attrLen) { 1226 if (sym.kind == TYP && sym.owner.kind == MDL) { 1227 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1228 ListBuffer<Directive> directives = new ListBuffer<>(); 1229 1230 ListBuffer<RequiresDirective> requires = new ListBuffer<>(); 1231 int nrequires = nextChar(); 1232 for (int i = 0; i < nrequires; i++) { 1233 Name name = readName(nextChar()); 1234 ModuleSymbol rsym = syms.enterModule(name); 1235 Set<RequiresFlag> flags = readRequiresFlags(nextChar()); 1236 requires.add(new RequiresDirective(rsym, flags)); 1237 } 1238 msym.requires = requires.toList(); 1239 directives.addAll(msym.requires); 1240 1241 ListBuffer<ExportsDirective> exports = new ListBuffer<>(); 1242 int nexports = nextChar(); 1243 for (int i = 0; i < nexports; i++) { 1244 Name n = readName(nextChar()); 1245 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n))); 1246 int nto = nextChar(); 1247 List<ModuleSymbol> to; 1248 if (nto == 0) { 1249 to = null; 1250 } else { 1251 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1252 for (int t = 0; t < nto; t++) 1253 lb.append(syms.enterModule(readName(nextChar()))); 1254 to = lb.toList(); 1255 } 1256 exports.add(new ExportsDirective(p, to)); 1257 } 1258 msym.exports = exports.toList(); 1259 directives.addAll(msym.exports); 1260 1261 msym.directives = directives.toList(); 1262 1263 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>(); 1264 int nuses = nextChar(); 1265 for (int i = 0; i < nuses; i++) { 1266 Name srvc = readClassName(nextChar()); 1267 uses.add(new InterimUsesDirective(srvc)); 1268 } 1269 interimUses = uses.toList(); 1270 1271 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>(); 1272 int nprovides = nextChar(); 1273 for (int i = 0; i < nprovides; i++) { 1274 Name srvc = readClassName(nextChar()); 1275 Name impl = readClassName(nextChar()); 1276 provides.add(new InterimProvidesDirective(srvc, impl)); 1277 } 1278 interimProvides = provides.toList(); 1279 } 1280 } 1281 }, 1282 1283 new AttributeReader(names.Version, V53, CLASS_ATTRIBUTE) { 1284 @Override 1285 protected boolean accepts(AttributeKind kind) { 1286 return super.accepts(kind) && allowModules; 1287 } 1288 protected void read(Symbol sym, int attrLen) { 1289 if (sym.kind == TYP && sym.owner.kind == MDL) { 1290 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1291 msym.version = readName(nextChar()); 1292 } 1293 } 1294 }, 1295 }; 1296 1297 for (AttributeReader r: readers) 1298 attributeReaders.put(r.name, r); 1299 } 1300 1301 protected void readEnclosingMethodAttr(Symbol sym) { 1302 // sym is a nested class with an "Enclosing Method" attribute 1303 // remove sym from it's current owners scope and place it in 1304 // the scope specified by the attribute 1305 sym.owner.members().remove(sym); 1306 ClassSymbol self = (ClassSymbol)sym; 1307 ClassSymbol c = readClassSymbol(nextChar()); 1308 NameAndType nt = readNameAndType(nextChar()); 1309 1310 if (c.members_field == null) 1311 throw badClassFile("bad.enclosing.class", self, c); 1312 1313 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1314 if (nt != null && m == null) 1315 throw badEnclosingMethod(self); 1316 1317 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1318 self.owner = m != null ? m : c; 1319 if (self.name.isEmpty()) 1320 self.fullname = names.empty; 1321 else 1322 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1323 1324 if (m != null) { 1325 ((ClassType)sym.type).setEnclosingType(m.type); 1326 } else if ((self.flags_field & STATIC) == 0) { 1327 ((ClassType)sym.type).setEnclosingType(c.type); 1328 } else { 1329 ((ClassType)sym.type).setEnclosingType(Type.noType); 1330 } 1331 enterTypevars(self); 1332 if (!missingTypeVariables.isEmpty()) { 1333 ListBuffer<Type> typeVars = new ListBuffer<>(); 1334 for (Type typevar : missingTypeVariables) { 1335 typeVars.append(findTypeVar(typevar.tsym.name)); 1336 } 1337 foundTypeVariables = typeVars.toList(); 1338 } else { 1339 foundTypeVariables = List.nil(); 1340 } 1341 } 1342 1343 // See java.lang.Class 1344 private Name simpleBinaryName(Name self, Name enclosing) { 1345 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1346 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1347 throw badClassFile("bad.enclosing.method", self); 1348 int index = 1; 1349 while (index < simpleBinaryName.length() && 1350 isAsciiDigit(simpleBinaryName.charAt(index))) 1351 index++; 1352 return names.fromString(simpleBinaryName.substring(index)); 1353 } 1354 1355 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1356 if (nt == null) 1357 return null; 1358 1359 MethodType type = nt.uniqueType.type.asMethodType(); 1360 1361 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1362 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1363 return (MethodSymbol)sym; 1364 } 1365 1366 if (nt.name != names.init) 1367 // not a constructor 1368 return null; 1369 if ((flags & INTERFACE) != 0) 1370 // no enclosing instance 1371 return null; 1372 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1373 // no parameters 1374 return null; 1375 1376 // A constructor of an inner class. 1377 // Remove the first argument (the enclosing instance) 1378 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1379 nt.uniqueType.type.getReturnType(), 1380 nt.uniqueType.type.getThrownTypes(), 1381 syms.methodClass)); 1382 // Try searching again 1383 return findMethod(nt, scope, flags); 1384 } 1385 1386 /** Similar to Types.isSameType but avoids completion */ 1387 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1388 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1389 .prepend(types.erasure(mt1.getReturnType())); 1390 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1391 while (!types1.isEmpty() && !types2.isEmpty()) { 1392 if (types1.head.tsym != types2.head.tsym) 1393 return false; 1394 types1 = types1.tail; 1395 types2 = types2.tail; 1396 } 1397 return types1.isEmpty() && types2.isEmpty(); 1398 } 1399 1400 /** 1401 * Character.isDigit answers <tt>true</tt> to some non-ascii 1402 * digits. This one does not. <b>copied from java.lang.Class</b> 1403 */ 1404 private static boolean isAsciiDigit(char c) { 1405 return '0' <= c && c <= '9'; 1406 } 1407 1408 /** Read member attributes. 1409 */ 1410 void readMemberAttrs(Symbol sym) { 1411 readAttrs(sym, AttributeKind.MEMBER); 1412 } 1413 1414 void readAttrs(Symbol sym, AttributeKind kind) { 1415 char ac = nextChar(); 1416 for (int i = 0; i < ac; i++) { 1417 Name attrName = readName(nextChar()); 1418 int attrLen = nextInt(); 1419 AttributeReader r = attributeReaders.get(attrName); 1420 if (r != null && r.accepts(kind)) 1421 r.read(sym, attrLen); 1422 else { 1423 bp = bp + attrLen; 1424 } 1425 } 1426 } 1427 1428 private boolean readingClassAttr = false; 1429 private List<Type> missingTypeVariables = List.nil(); 1430 private List<Type> foundTypeVariables = List.nil(); 1431 1432 /** Read class attributes. 1433 */ 1434 void readClassAttrs(ClassSymbol c) { 1435 readAttrs(c, AttributeKind.CLASS); 1436 } 1437 1438 /** Read code block. 1439 */ 1440 Code readCode(Symbol owner) { 1441 nextChar(); // max_stack 1442 nextChar(); // max_locals 1443 final int code_length = nextInt(); 1444 bp += code_length; 1445 final char exception_table_length = nextChar(); 1446 bp += exception_table_length * 8; 1447 readMemberAttrs(owner); 1448 return null; 1449 } 1450 1451/************************************************************************ 1452 * Reading Java-language annotations 1453 ***********************************************************************/ 1454 1455 /** Attach annotations. 1456 */ 1457 void attachAnnotations(final Symbol sym) { 1458 int numAttributes = nextChar(); 1459 if (numAttributes != 0) { 1460 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1461 for (int i = 0; i<numAttributes; i++) { 1462 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1463 1464 if (proxy.type.tsym == syms.proprietaryType.tsym) 1465 sym.flags_field |= PROPRIETARY; 1466 else if (proxy.type.tsym == syms.profileType.tsym) { 1467 if (profile != Profile.DEFAULT) { 1468 for (Pair<Name,Attribute> v: proxy.values) { 1469 if (v.fst == names.value && v.snd instanceof Attribute.Constant) { 1470 Attribute.Constant c = (Attribute.Constant) v.snd; 1471 if (c.type == syms.intType && ((Integer) c.value) > profile.value) { 1472 sym.flags_field |= NOT_IN_PROFILE; 1473 } 1474 } 1475 } 1476 } 1477 } else { 1478 if (proxy.type.tsym == syms.annotationTargetType.tsym) { 1479 target = proxy; 1480 } else if (proxy.type.tsym == syms.repeatableType.tsym) { 1481 repeatable = proxy; 1482 } 1483 1484 proxies.append(proxy); 1485 } 1486 } 1487 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1488 } 1489 } 1490 1491 /** Attach parameter annotations. 1492 */ 1493 void attachParameterAnnotations(final Symbol method) { 1494 final MethodSymbol meth = (MethodSymbol)method; 1495 int numParameters = buf[bp++] & 0xFF; 1496 List<VarSymbol> parameters = meth.params(); 1497 int pnum = 0; 1498 while (parameters.tail != null) { 1499 attachAnnotations(parameters.head); 1500 parameters = parameters.tail; 1501 pnum++; 1502 } 1503 if (pnum != numParameters) { 1504 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1505 } 1506 } 1507 1508 void attachTypeAnnotations(final Symbol sym) { 1509 int numAttributes = nextChar(); 1510 if (numAttributes != 0) { 1511 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1512 for (int i = 0; i < numAttributes; i++) 1513 proxies.append(readTypeAnnotation()); 1514 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1515 } 1516 } 1517 1518 /** Attach the default value for an annotation element. 1519 */ 1520 void attachAnnotationDefault(final Symbol sym) { 1521 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1522 final Attribute value = readAttributeValue(); 1523 1524 // The default value is set later during annotation. It might 1525 // be the case that the Symbol sym is annotated _after_ the 1526 // repeating instances that depend on this default value, 1527 // because of this we set an interim value that tells us this 1528 // element (most likely) has a default. 1529 // 1530 // Set interim value for now, reset just before we do this 1531 // properly at annotate time. 1532 meth.defaultValue = value; 1533 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1534 } 1535 1536 Type readTypeOrClassSymbol(int i) { 1537 // support preliminary jsr175-format class files 1538 if (buf[poolIdx[i]] == CONSTANT_Class) 1539 return readClassSymbol(i).type; 1540 return readType(i); 1541 } 1542 Type readEnumType(int i) { 1543 // support preliminary jsr175-format class files 1544 int index = poolIdx[i]; 1545 int length = getChar(index + 1); 1546 if (buf[index + length + 2] != ';') 1547 return enterClass(readName(i)).type; 1548 return readType(i); 1549 } 1550 1551 CompoundAnnotationProxy readCompoundAnnotation() { 1552 Type t = readTypeOrClassSymbol(nextChar()); 1553 int numFields = nextChar(); 1554 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1555 for (int i=0; i<numFields; i++) { 1556 Name name = readName(nextChar()); 1557 Attribute value = readAttributeValue(); 1558 pairs.append(new Pair<>(name, value)); 1559 } 1560 return new CompoundAnnotationProxy(t, pairs.toList()); 1561 } 1562 1563 TypeAnnotationProxy readTypeAnnotation() { 1564 TypeAnnotationPosition position = readPosition(); 1565 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1566 1567 return new TypeAnnotationProxy(proxy, position); 1568 } 1569 1570 TypeAnnotationPosition readPosition() { 1571 int tag = nextByte(); // TargetType tag is a byte 1572 1573 if (!TargetType.isValidTargetTypeValue(tag)) 1574 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1575 1576 TargetType type = TargetType.fromTargetTypeValue(tag); 1577 1578 switch (type) { 1579 // instanceof 1580 case INSTANCEOF: { 1581 final int offset = nextChar(); 1582 final TypeAnnotationPosition position = 1583 TypeAnnotationPosition.instanceOf(readTypePath()); 1584 position.offset = offset; 1585 return position; 1586 } 1587 // new expression 1588 case NEW: { 1589 final int offset = nextChar(); 1590 final TypeAnnotationPosition position = 1591 TypeAnnotationPosition.newObj(readTypePath()); 1592 position.offset = offset; 1593 return position; 1594 } 1595 // constructor/method reference receiver 1596 case CONSTRUCTOR_REFERENCE: { 1597 final int offset = nextChar(); 1598 final TypeAnnotationPosition position = 1599 TypeAnnotationPosition.constructorRef(readTypePath()); 1600 position.offset = offset; 1601 return position; 1602 } 1603 case METHOD_REFERENCE: { 1604 final int offset = nextChar(); 1605 final TypeAnnotationPosition position = 1606 TypeAnnotationPosition.methodRef(readTypePath()); 1607 position.offset = offset; 1608 return position; 1609 } 1610 // local variable 1611 case LOCAL_VARIABLE: { 1612 final int table_length = nextChar(); 1613 final int[] newLvarOffset = new int[table_length]; 1614 final int[] newLvarLength = new int[table_length]; 1615 final int[] newLvarIndex = new int[table_length]; 1616 1617 for (int i = 0; i < table_length; ++i) { 1618 newLvarOffset[i] = nextChar(); 1619 newLvarLength[i] = nextChar(); 1620 newLvarIndex[i] = nextChar(); 1621 } 1622 1623 final TypeAnnotationPosition position = 1624 TypeAnnotationPosition.localVariable(readTypePath()); 1625 position.lvarOffset = newLvarOffset; 1626 position.lvarLength = newLvarLength; 1627 position.lvarIndex = newLvarIndex; 1628 return position; 1629 } 1630 // resource variable 1631 case RESOURCE_VARIABLE: { 1632 final int table_length = nextChar(); 1633 final int[] newLvarOffset = new int[table_length]; 1634 final int[] newLvarLength = new int[table_length]; 1635 final int[] newLvarIndex = new int[table_length]; 1636 1637 for (int i = 0; i < table_length; ++i) { 1638 newLvarOffset[i] = nextChar(); 1639 newLvarLength[i] = nextChar(); 1640 newLvarIndex[i] = nextChar(); 1641 } 1642 1643 final TypeAnnotationPosition position = 1644 TypeAnnotationPosition.resourceVariable(readTypePath()); 1645 position.lvarOffset = newLvarOffset; 1646 position.lvarLength = newLvarLength; 1647 position.lvarIndex = newLvarIndex; 1648 return position; 1649 } 1650 // exception parameter 1651 case EXCEPTION_PARAMETER: { 1652 final int exception_index = nextChar(); 1653 final TypeAnnotationPosition position = 1654 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1655 position.setExceptionIndex(exception_index); 1656 return position; 1657 } 1658 // method receiver 1659 case METHOD_RECEIVER: 1660 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1661 // type parameter 1662 case CLASS_TYPE_PARAMETER: { 1663 final int parameter_index = nextByte(); 1664 return TypeAnnotationPosition 1665 .typeParameter(readTypePath(), parameter_index); 1666 } 1667 case METHOD_TYPE_PARAMETER: { 1668 final int parameter_index = nextByte(); 1669 return TypeAnnotationPosition 1670 .methodTypeParameter(readTypePath(), parameter_index); 1671 } 1672 // type parameter bound 1673 case CLASS_TYPE_PARAMETER_BOUND: { 1674 final int parameter_index = nextByte(); 1675 final int bound_index = nextByte(); 1676 return TypeAnnotationPosition 1677 .typeParameterBound(readTypePath(), parameter_index, 1678 bound_index); 1679 } 1680 case METHOD_TYPE_PARAMETER_BOUND: { 1681 final int parameter_index = nextByte(); 1682 final int bound_index = nextByte(); 1683 return TypeAnnotationPosition 1684 .methodTypeParameterBound(readTypePath(), parameter_index, 1685 bound_index); 1686 } 1687 // class extends or implements clause 1688 case CLASS_EXTENDS: { 1689 final int type_index = nextChar(); 1690 return TypeAnnotationPosition.classExtends(readTypePath(), 1691 type_index); 1692 } 1693 // throws 1694 case THROWS: { 1695 final int type_index = nextChar(); 1696 return TypeAnnotationPosition.methodThrows(readTypePath(), 1697 type_index); 1698 } 1699 // method parameter 1700 case METHOD_FORMAL_PARAMETER: { 1701 final int parameter_index = nextByte(); 1702 return TypeAnnotationPosition.methodParameter(readTypePath(), 1703 parameter_index); 1704 } 1705 // type cast 1706 case CAST: { 1707 final int offset = nextChar(); 1708 final int type_index = nextByte(); 1709 final TypeAnnotationPosition position = 1710 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1711 position.offset = offset; 1712 return position; 1713 } 1714 // method/constructor/reference type argument 1715 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1716 final int offset = nextChar(); 1717 final int type_index = nextByte(); 1718 final TypeAnnotationPosition position = TypeAnnotationPosition 1719 .constructorInvocationTypeArg(readTypePath(), type_index); 1720 position.offset = offset; 1721 return position; 1722 } 1723 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1724 final int offset = nextChar(); 1725 final int type_index = nextByte(); 1726 final TypeAnnotationPosition position = TypeAnnotationPosition 1727 .methodInvocationTypeArg(readTypePath(), type_index); 1728 position.offset = offset; 1729 return position; 1730 } 1731 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1732 final int offset = nextChar(); 1733 final int type_index = nextByte(); 1734 final TypeAnnotationPosition position = TypeAnnotationPosition 1735 .constructorRefTypeArg(readTypePath(), type_index); 1736 position.offset = offset; 1737 return position; 1738 } 1739 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1740 final int offset = nextChar(); 1741 final int type_index = nextByte(); 1742 final TypeAnnotationPosition position = TypeAnnotationPosition 1743 .methodRefTypeArg(readTypePath(), type_index); 1744 position.offset = offset; 1745 return position; 1746 } 1747 // We don't need to worry about these 1748 case METHOD_RETURN: 1749 return TypeAnnotationPosition.methodReturn(readTypePath()); 1750 case FIELD: 1751 return TypeAnnotationPosition.field(readTypePath()); 1752 case UNKNOWN: 1753 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1754 default: 1755 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1756 } 1757 } 1758 1759 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1760 int len = nextByte(); 1761 ListBuffer<Integer> loc = new ListBuffer<>(); 1762 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1763 loc = loc.append(nextByte()); 1764 1765 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1766 1767 } 1768 1769 Attribute readAttributeValue() { 1770 char c = (char) buf[bp++]; 1771 switch (c) { 1772 case 'B': 1773 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1774 case 'C': 1775 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1776 case 'D': 1777 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1778 case 'F': 1779 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1780 case 'I': 1781 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1782 case 'J': 1783 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1784 case 'S': 1785 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1786 case 'Z': 1787 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1788 case 's': 1789 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1790 case 'e': 1791 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1792 case 'c': 1793 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar())); 1794 case '[': { 1795 int n = nextChar(); 1796 ListBuffer<Attribute> l = new ListBuffer<>(); 1797 for (int i=0; i<n; i++) 1798 l.append(readAttributeValue()); 1799 return new ArrayAttributeProxy(l.toList()); 1800 } 1801 case '@': 1802 return readCompoundAnnotation(); 1803 default: 1804 throw new AssertionError("unknown annotation tag '" + c + "'"); 1805 } 1806 } 1807 1808 interface ProxyVisitor extends Attribute.Visitor { 1809 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1810 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1811 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1812 } 1813 1814 static class EnumAttributeProxy extends Attribute { 1815 Type enumType; 1816 Name enumerator; 1817 public EnumAttributeProxy(Type enumType, Name enumerator) { 1818 super(null); 1819 this.enumType = enumType; 1820 this.enumerator = enumerator; 1821 } 1822 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1823 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1824 public String toString() { 1825 return "/*proxy enum*/" + enumType + "." + enumerator; 1826 } 1827 } 1828 1829 static class ArrayAttributeProxy extends Attribute { 1830 List<Attribute> values; 1831 ArrayAttributeProxy(List<Attribute> values) { 1832 super(null); 1833 this.values = values; 1834 } 1835 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1836 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1837 public String toString() { 1838 return "{" + values + "}"; 1839 } 1840 } 1841 1842 /** A temporary proxy representing a compound attribute. 1843 */ 1844 static class CompoundAnnotationProxy extends Attribute { 1845 final List<Pair<Name,Attribute>> values; 1846 public CompoundAnnotationProxy(Type type, 1847 List<Pair<Name,Attribute>> values) { 1848 super(type); 1849 this.values = values; 1850 } 1851 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 1852 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1853 public String toString() { 1854 StringBuilder buf = new StringBuilder(); 1855 buf.append("@"); 1856 buf.append(type.tsym.getQualifiedName()); 1857 buf.append("/*proxy*/{"); 1858 boolean first = true; 1859 for (List<Pair<Name,Attribute>> v = values; 1860 v.nonEmpty(); v = v.tail) { 1861 Pair<Name,Attribute> value = v.head; 1862 if (!first) buf.append(","); 1863 first = false; 1864 buf.append(value.fst); 1865 buf.append("="); 1866 buf.append(value.snd); 1867 } 1868 buf.append("}"); 1869 return buf.toString(); 1870 } 1871 } 1872 1873 /** A temporary proxy representing a type annotation. 1874 */ 1875 static class TypeAnnotationProxy { 1876 final CompoundAnnotationProxy compound; 1877 final TypeAnnotationPosition position; 1878 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 1879 TypeAnnotationPosition position) { 1880 this.compound = compound; 1881 this.position = position; 1882 } 1883 } 1884 1885 class AnnotationDeproxy implements ProxyVisitor { 1886 private ClassSymbol requestingOwner; 1887 1888 AnnotationDeproxy(ClassSymbol owner) { 1889 this.requestingOwner = owner; 1890 } 1891 1892 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 1893 // also must fill in types!!!! 1894 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 1895 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 1896 buf.append(deproxyCompound(l.head)); 1897 } 1898 return buf.toList(); 1899 } 1900 1901 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 1902 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 1903 for (List<Pair<Name,Attribute>> l = a.values; 1904 l.nonEmpty(); 1905 l = l.tail) { 1906 MethodSymbol meth = findAccessMethod(a.type, l.head.fst); 1907 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 1908 } 1909 return new Attribute.Compound(a.type, buf.toList()); 1910 } 1911 1912 MethodSymbol findAccessMethod(Type container, Name name) { 1913 CompletionFailure failure = null; 1914 try { 1915 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 1916 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 1917 return (MethodSymbol) sym; 1918 } 1919 } catch (CompletionFailure ex) { 1920 failure = ex; 1921 } 1922 // The method wasn't found: emit a warning and recover 1923 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 1924 try { 1925 if (lintClassfile) { 1926 if (failure == null) { 1927 log.warning("annotation.method.not.found", 1928 container, 1929 name); 1930 } else { 1931 log.warning("annotation.method.not.found.reason", 1932 container, 1933 name, 1934 failure.getDetailValue());//diagnostic, if present 1935 } 1936 } 1937 } finally { 1938 log.useSource(prevSource); 1939 } 1940 // Construct a new method type and symbol. Use bottom 1941 // type (typeof null) as return type because this type is 1942 // a subtype of all reference types and can be converted 1943 // to primitive types by unboxing. 1944 MethodType mt = new MethodType(List.<Type>nil(), 1945 syms.botType, 1946 List.<Type>nil(), 1947 syms.methodClass); 1948 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 1949 } 1950 1951 Attribute result; 1952 Type type; 1953 Attribute deproxy(Type t, Attribute a) { 1954 Type oldType = type; 1955 try { 1956 type = t; 1957 a.accept(this); 1958 return result; 1959 } finally { 1960 type = oldType; 1961 } 1962 } 1963 1964 // implement Attribute.Visitor below 1965 1966 public void visitConstant(Attribute.Constant value) { 1967 // assert value.type == type; 1968 result = value; 1969 } 1970 1971 public void visitClass(Attribute.Class clazz) { 1972 result = clazz; 1973 } 1974 1975 public void visitEnum(Attribute.Enum e) { 1976 throw new AssertionError(); // shouldn't happen 1977 } 1978 1979 public void visitCompound(Attribute.Compound compound) { 1980 throw new AssertionError(); // shouldn't happen 1981 } 1982 1983 public void visitArray(Attribute.Array array) { 1984 throw new AssertionError(); // shouldn't happen 1985 } 1986 1987 public void visitError(Attribute.Error e) { 1988 throw new AssertionError(); // shouldn't happen 1989 } 1990 1991 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 1992 // type.tsym.flatName() should == proxy.enumFlatName 1993 TypeSymbol enumTypeSym = proxy.enumType.tsym; 1994 VarSymbol enumerator = null; 1995 CompletionFailure failure = null; 1996 try { 1997 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 1998 if (sym.kind == VAR) { 1999 enumerator = (VarSymbol)sym; 2000 break; 2001 } 2002 } 2003 } 2004 catch (CompletionFailure ex) { 2005 failure = ex; 2006 } 2007 if (enumerator == null) { 2008 if (failure != null) { 2009 log.warning("unknown.enum.constant.reason", 2010 currentClassFile, enumTypeSym, proxy.enumerator, 2011 failure.getDiagnostic()); 2012 } else { 2013 log.warning("unknown.enum.constant", 2014 currentClassFile, enumTypeSym, proxy.enumerator); 2015 } 2016 result = new Attribute.Enum(enumTypeSym.type, 2017 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 2018 } else { 2019 result = new Attribute.Enum(enumTypeSym.type, enumerator); 2020 } 2021 } 2022 2023 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 2024 int length = proxy.values.length(); 2025 Attribute[] ats = new Attribute[length]; 2026 Type elemtype = types.elemtype(type); 2027 int i = 0; 2028 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 2029 ats[i++] = deproxy(elemtype, p.head); 2030 } 2031 result = new Attribute.Array(type, ats); 2032 } 2033 2034 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 2035 result = deproxyCompound(proxy); 2036 } 2037 } 2038 2039 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable { 2040 final MethodSymbol sym; 2041 final Attribute value; 2042 final JavaFileObject classFile = currentClassFile; 2043 2044 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 2045 super(currentOwner.kind == MTH 2046 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2047 this.sym = sym; 2048 this.value = value; 2049 } 2050 2051 @Override 2052 public void run() { 2053 JavaFileObject previousClassFile = currentClassFile; 2054 try { 2055 // Reset the interim value set earlier in 2056 // attachAnnotationDefault(). 2057 sym.defaultValue = null; 2058 currentClassFile = classFile; 2059 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 2060 } finally { 2061 currentClassFile = previousClassFile; 2062 } 2063 } 2064 2065 @Override 2066 public String toString() { 2067 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 2068 } 2069 } 2070 2071 class AnnotationCompleter extends AnnotationDeproxy implements Runnable { 2072 final Symbol sym; 2073 final List<CompoundAnnotationProxy> l; 2074 final JavaFileObject classFile; 2075 2076 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 2077 super(currentOwner.kind == MTH 2078 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2079 this.sym = sym; 2080 this.l = l; 2081 this.classFile = currentClassFile; 2082 } 2083 2084 @Override 2085 public void run() { 2086 JavaFileObject previousClassFile = currentClassFile; 2087 try { 2088 currentClassFile = classFile; 2089 List<Attribute.Compound> newList = deproxyCompoundList(l); 2090 if (sym.annotationsPendingCompletion()) { 2091 sym.setDeclarationAttributes(newList); 2092 } else { 2093 sym.appendAttributes(newList); 2094 } 2095 } finally { 2096 currentClassFile = previousClassFile; 2097 } 2098 } 2099 2100 @Override 2101 public String toString() { 2102 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 2103 } 2104 } 2105 2106 class TypeAnnotationCompleter extends AnnotationCompleter { 2107 2108 List<TypeAnnotationProxy> proxies; 2109 2110 TypeAnnotationCompleter(Symbol sym, 2111 List<TypeAnnotationProxy> proxies) { 2112 super(sym, List.<CompoundAnnotationProxy>nil()); 2113 this.proxies = proxies; 2114 } 2115 2116 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 2117 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 2118 for (TypeAnnotationProxy proxy: proxies) { 2119 Attribute.Compound compound = deproxyCompound(proxy.compound); 2120 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 2121 buf.add(typeCompound); 2122 } 2123 return buf.toList(); 2124 } 2125 2126 @Override 2127 public void run() { 2128 JavaFileObject previousClassFile = currentClassFile; 2129 try { 2130 currentClassFile = classFile; 2131 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 2132 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 2133 } finally { 2134 currentClassFile = previousClassFile; 2135 } 2136 } 2137 } 2138 2139 2140/************************************************************************ 2141 * Reading Symbols 2142 ***********************************************************************/ 2143 2144 /** Read a field. 2145 */ 2146 VarSymbol readField() { 2147 long flags = adjustFieldFlags(nextChar()); 2148 Name name = readName(nextChar()); 2149 Type type = readType(nextChar()); 2150 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2151 readMemberAttrs(v); 2152 return v; 2153 } 2154 2155 /** Read a method. 2156 */ 2157 MethodSymbol readMethod() { 2158 long flags = adjustMethodFlags(nextChar()); 2159 Name name = readName(nextChar()); 2160 Type type = readType(nextChar()); 2161 if (currentOwner.isInterface() && 2162 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2163 if (majorVersion > Version.V52.major || 2164 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 2165 if ((flags & STATIC) == 0) { 2166 currentOwner.flags_field |= DEFAULT; 2167 flags |= DEFAULT | ABSTRACT; 2168 } 2169 } else { 2170 //protect against ill-formed classfiles 2171 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2172 Integer.toString(majorVersion), 2173 Integer.toString(minorVersion)); 2174 } 2175 } 2176 if (name == names.init && currentOwner.hasOuterInstance()) { 2177 // Sometimes anonymous classes don't have an outer 2178 // instance, however, there is no reliable way to tell so 2179 // we never strip this$n 2180 if (!currentOwner.name.isEmpty()) 2181 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2182 type.getReturnType(), 2183 type.getThrownTypes(), 2184 syms.methodClass); 2185 } 2186 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2187 if (types.isSignaturePolymorphic(m)) { 2188 m.flags_field |= SIGNATURE_POLYMORPHIC; 2189 } 2190 if (saveParameterNames) 2191 initParameterNames(m); 2192 Symbol prevOwner = currentOwner; 2193 currentOwner = m; 2194 try { 2195 readMemberAttrs(m); 2196 } finally { 2197 currentOwner = prevOwner; 2198 } 2199 if (saveParameterNames) 2200 setParameterNames(m, type); 2201 2202 if ((flags & VARARGS) != 0) { 2203 final Type last = type.getParameterTypes().last(); 2204 if (last == null || !last.hasTag(ARRAY)) { 2205 m.flags_field &= ~VARARGS; 2206 throw badClassFile("malformed.vararg.method", m); 2207 } 2208 } 2209 2210 return m; 2211 } 2212 2213 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2214 boolean isVarargs = (flags & VARARGS) != 0; 2215 if (isVarargs) { 2216 Type varargsElem = args.last(); 2217 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2218 for (Type t : args) { 2219 adjustedArgs.append(t != varargsElem ? 2220 t : 2221 ((ArrayType)t).makeVarargs()); 2222 } 2223 args = adjustedArgs.toList(); 2224 } 2225 return args.tail; 2226 } 2227 2228 /** 2229 * Init the parameter names array. 2230 * Parameter names are currently inferred from the names in the 2231 * LocalVariableTable attributes of a Code attribute. 2232 * (Note: this means parameter names are currently not available for 2233 * methods without a Code attribute.) 2234 * This method initializes an array in which to store the name indexes 2235 * of parameter names found in LocalVariableTable attributes. It is 2236 * slightly supersized to allow for additional slots with a start_pc of 0. 2237 */ 2238 void initParameterNames(MethodSymbol sym) { 2239 // make allowance for synthetic parameters. 2240 final int excessSlots = 4; 2241 int expectedParameterSlots = 2242 Code.width(sym.type.getParameterTypes()) + excessSlots; 2243 if (parameterNameIndices == null 2244 || parameterNameIndices.length < expectedParameterSlots) { 2245 parameterNameIndices = new int[expectedParameterSlots]; 2246 } else 2247 Arrays.fill(parameterNameIndices, 0); 2248 haveParameterNameIndices = false; 2249 sawMethodParameters = false; 2250 } 2251 2252 /** 2253 * Set the parameter names for a symbol from the name index in the 2254 * parameterNameIndicies array. The type of the symbol may have changed 2255 * while reading the method attributes (see the Signature attribute). 2256 * This may be because of generic information or because anonymous 2257 * synthetic parameters were added. The original type (as read from 2258 * the method descriptor) is used to help guess the existence of 2259 * anonymous synthetic parameters. 2260 * On completion, sym.savedParameter names will either be null (if 2261 * no parameter names were found in the class file) or will be set to a 2262 * list of names, one per entry in sym.type.getParameterTypes, with 2263 * any missing names represented by the empty name. 2264 */ 2265 void setParameterNames(MethodSymbol sym, Type jvmType) { 2266 // if no names were found in the class file, there's nothing more to do 2267 if (!haveParameterNameIndices) 2268 return; 2269 // If we get parameter names from MethodParameters, then we 2270 // don't need to skip. 2271 int firstParam = 0; 2272 if (!sawMethodParameters) { 2273 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2274 // the code in readMethod may have skipped the first 2275 // parameter when setting up the MethodType. If so, we 2276 // make a corresponding allowance here for the position of 2277 // the first parameter. Note that this assumes the 2278 // skipped parameter has a width of 1 -- i.e. it is not 2279 // a double width type (long or double.) 2280 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2281 // Sometimes anonymous classes don't have an outer 2282 // instance, however, there is no reliable way to tell so 2283 // we never strip this$n 2284 if (!currentOwner.name.isEmpty()) 2285 firstParam += 1; 2286 } 2287 2288 if (sym.type != jvmType) { 2289 // reading the method attributes has caused the 2290 // symbol's type to be changed. (i.e. the Signature 2291 // attribute.) This may happen if there are hidden 2292 // (synthetic) parameters in the descriptor, but not 2293 // in the Signature. The position of these hidden 2294 // parameters is unspecified; for now, assume they are 2295 // at the beginning, and so skip over them. The 2296 // primary case for this is two hidden parameters 2297 // passed into Enum constructors. 2298 int skip = Code.width(jvmType.getParameterTypes()) 2299 - Code.width(sym.type.getParameterTypes()); 2300 firstParam += skip; 2301 } 2302 } 2303 List<Name> paramNames = List.nil(); 2304 int index = firstParam; 2305 for (Type t: sym.type.getParameterTypes()) { 2306 int nameIdx = (index < parameterNameIndices.length 2307 ? parameterNameIndices[index] : 0); 2308 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2309 paramNames = paramNames.prepend(name); 2310 index += Code.width(t); 2311 } 2312 sym.savedParameterNames = paramNames.reverse(); 2313 } 2314 2315 /** 2316 * skip n bytes 2317 */ 2318 void skipBytes(int n) { 2319 bp = bp + n; 2320 } 2321 2322 /** Skip a field or method 2323 */ 2324 void skipMember() { 2325 bp = bp + 6; 2326 char ac = nextChar(); 2327 for (int i = 0; i < ac; i++) { 2328 bp = bp + 2; 2329 int attrLen = nextInt(); 2330 bp = bp + attrLen; 2331 } 2332 } 2333 2334 void skipInnerClasses() { 2335 int n = nextChar(); 2336 for (int i = 0; i < n; i++) { 2337 nextChar(); 2338 nextChar(); 2339 nextChar(); 2340 nextChar(); 2341 } 2342 } 2343 2344 /** Enter type variables of this classtype and all enclosing ones in 2345 * `typevars'. 2346 */ 2347 protected void enterTypevars(Type t) { 2348 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS)) 2349 enterTypevars(t.getEnclosingType()); 2350 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) 2351 typevars.enter(xs.head.tsym); 2352 } 2353 2354 protected void enterTypevars(Symbol sym) { 2355 if (sym.owner.kind == MTH) { 2356 enterTypevars(sym.owner); 2357 enterTypevars(sym.owner.owner); 2358 } 2359 enterTypevars(sym.type); 2360 } 2361 2362 protected ClassSymbol enterClass(Name name) { 2363 return syms.enterClass(currentModule, name); 2364 } 2365 2366 protected ClassSymbol enterClass(Name name, TypeSymbol owner) { 2367 return syms.enterClass(currentModule, name, owner); 2368 } 2369 2370 /** Read contents of a given class symbol `c'. Both external and internal 2371 * versions of an inner class are read. 2372 */ 2373 void readClass(ClassSymbol c) { 2374 ClassType ct = (ClassType)c.type; 2375 2376 // allocate scope for members 2377 c.members_field = WriteableScope.create(c); 2378 2379 // prepare type variable table 2380 typevars = typevars.dup(currentOwner); 2381 if (ct.getEnclosingType().hasTag(CLASS)) 2382 enterTypevars(ct.getEnclosingType()); 2383 2384 // read flags, or skip if this is an inner class 2385 long f = nextChar(); 2386 long flags = adjustClassFlags(f); 2387 if ((flags & MODULE) == 0) { 2388 if (c.owner.kind == PCK) c.flags_field = flags; 2389 // read own class name and check that it matches 2390 currentModule = c.packge().modle; 2391 ClassSymbol self = readClassSymbol(nextChar()); 2392 if (c != self) { 2393 throw badClassFile("class.file.wrong.class", 2394 self.flatname); 2395 } 2396 } else { 2397 c.flags_field = flags; 2398 Name modInfoName = readModuleInfoName(nextChar()); 2399 if (c.owner.name == null) { 2400 syms.enterModule((ModuleSymbol) c.owner, Convert.packagePart(modInfoName)); 2401 } else { 2402 // TODO: validate name 2403 } 2404 currentModule = (ModuleSymbol) c.owner; 2405 } 2406 2407 // class attributes must be read before class 2408 // skip ahead to read class attributes 2409 int startbp = bp; 2410 nextChar(); 2411 char interfaceCount = nextChar(); 2412 bp += interfaceCount * 2; 2413 char fieldCount = nextChar(); 2414 for (int i = 0; i < fieldCount; i++) skipMember(); 2415 char methodCount = nextChar(); 2416 for (int i = 0; i < methodCount; i++) skipMember(); 2417 readClassAttrs(c); 2418 2419 if (readAllOfClassFile) { 2420 for (int i = 1; i < poolObj.length; i++) readPool(i); 2421 c.pool = new Pool(poolObj.length, poolObj, types); 2422 } 2423 2424 // reset and read rest of classinfo 2425 bp = startbp; 2426 int n = nextChar(); 2427 if ((flags & MODULE) != 0 && n > 0) { 2428 throw badClassFile("module.info.invalid.super.class"); 2429 } 2430 if (ct.supertype_field == null) 2431 ct.supertype_field = (n == 0) 2432 ? Type.noType 2433 : readClassSymbol(n).erasure(types); 2434 n = nextChar(); 2435 List<Type> is = List.nil(); 2436 for (int i = 0; i < n; i++) { 2437 Type _inter = readClassSymbol(nextChar()).erasure(types); 2438 is = is.prepend(_inter); 2439 } 2440 if (ct.interfaces_field == null) 2441 ct.interfaces_field = is.reverse(); 2442 2443 Assert.check(fieldCount == nextChar()); 2444 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2445 Assert.check(methodCount == nextChar()); 2446 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2447 2448 typevars = typevars.leave(); 2449 } 2450 2451 /** Read inner class info. For each inner/outer pair allocate a 2452 * member class. 2453 */ 2454 void readInnerClasses(ClassSymbol c) { 2455 int n = nextChar(); 2456 for (int i = 0; i < n; i++) { 2457 nextChar(); // skip inner class symbol 2458 ClassSymbol outer = readClassSymbol(nextChar()); 2459 Name name = readName(nextChar()); 2460 if (name == null) name = names.empty; 2461 long flags = adjustClassFlags(nextChar()); 2462 if (outer != null) { // we have a member class 2463 if (name == names.empty) 2464 name = names.one; 2465 ClassSymbol member = enterClass(name, outer); 2466 if ((flags & STATIC) == 0) { 2467 ((ClassType)member.type).setEnclosingType(outer.type); 2468 if (member.erasure_field != null) 2469 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2470 } 2471 if (c == outer) { 2472 member.flags_field = flags; 2473 enterMember(c, member); 2474 } 2475 } 2476 } 2477 } 2478 2479 /** Read a class definition from the bytes in buf. 2480 */ 2481 private void readClassBuffer(ClassSymbol c) throws IOException { 2482 int magic = nextInt(); 2483 if (magic != JAVA_MAGIC) 2484 throw badClassFile("illegal.start.of.class.file"); 2485 2486 minorVersion = nextChar(); 2487 majorVersion = nextChar(); 2488 int maxMajor = Version.MAX().major; 2489 int maxMinor = Version.MAX().minor; 2490 if (majorVersion > maxMajor || 2491 majorVersion * 1000 + minorVersion < 2492 Version.MIN().major * 1000 + Version.MIN().minor) { 2493 if (majorVersion == (maxMajor + 1)) 2494 log.warning("big.major.version", 2495 currentClassFile, 2496 majorVersion, 2497 maxMajor); 2498 else 2499 throw badClassFile("wrong.version", 2500 Integer.toString(majorVersion), 2501 Integer.toString(minorVersion), 2502 Integer.toString(maxMajor), 2503 Integer.toString(maxMinor)); 2504 } 2505 2506 indexPool(); 2507 if (signatureBuffer.length < bp) { 2508 int ns = Integer.highestOneBit(bp) << 1; 2509 signatureBuffer = new byte[ns]; 2510 } 2511 readClass(c); 2512 } 2513 2514 public void readClassFile(ClassSymbol c) { 2515 currentOwner = c; 2516 currentClassFile = c.classfile; 2517 warnedAttrs.clear(); 2518 filling = true; 2519 target = null; 2520 repeatable = null; 2521 try { 2522 bp = 0; 2523 buf = readInputStream(buf, c.classfile.openInputStream()); 2524 readClassBuffer(c); 2525 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 2526 List<Type> missing = missingTypeVariables; 2527 List<Type> found = foundTypeVariables; 2528 missingTypeVariables = List.nil(); 2529 foundTypeVariables = List.nil(); 2530 filling = false; 2531 ClassType ct = (ClassType)currentOwner.type; 2532 ct.supertype_field = 2533 types.subst(ct.supertype_field, missing, found); 2534 ct.interfaces_field = 2535 types.subst(ct.interfaces_field, missing, found); 2536 } else if (missingTypeVariables.isEmpty() != 2537 foundTypeVariables.isEmpty()) { 2538 Name name = missingTypeVariables.head.tsym.name; 2539 throw badClassFile("undecl.type.var", name); 2540 } 2541 2542 if ((c.flags_field & Flags.ANNOTATION) != 0) { 2543 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable))); 2544 } else { 2545 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType()); 2546 } 2547 2548 if (c == currentModule.module_info) { 2549 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) { 2550 Assert.check(currentModule.isCompleted()); 2551 currentModule.usesProvidesCompleter = 2552 new UsesProvidesCompleter(currentModule, interimUses, interimProvides); 2553 } else { 2554 currentModule.uses = List.nil(); 2555 currentModule.provides = List.nil(); 2556 } 2557 } 2558 } catch (IOException ex) { 2559 throw badClassFile("unable.to.access.file", ex.getMessage()); 2560 } catch (ArrayIndexOutOfBoundsException ex) { 2561 throw badClassFile("bad.class.file", c.flatname); 2562 } finally { 2563 interimUses = List.nil(); 2564 interimProvides = List.nil(); 2565 missingTypeVariables = List.nil(); 2566 foundTypeVariables = List.nil(); 2567 filling = false; 2568 } 2569 } 2570 // where 2571 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { 2572 try { 2573 buf = ensureCapacity(buf, s.available()); 2574 int r = s.read(buf); 2575 int bp = 0; 2576 while (r != -1) { 2577 bp += r; 2578 buf = ensureCapacity(buf, bp); 2579 r = s.read(buf, bp, buf.length - bp); 2580 } 2581 return buf; 2582 } finally { 2583 try { 2584 s.close(); 2585 } catch (IOException e) { 2586 /* Ignore any errors, as this stream may have already 2587 * thrown a related exception which is the one that 2588 * should be reported. 2589 */ 2590 } 2591 } 2592 } 2593 /* 2594 * ensureCapacity will increase the buffer as needed, taking note that 2595 * the new buffer will always be greater than the needed and never 2596 * exactly equal to the needed size or bp. If equal then the read (above) 2597 * will infinitely loop as buf.length - bp == 0. 2598 */ 2599 private static byte[] ensureCapacity(byte[] buf, int needed) { 2600 if (buf.length <= needed) { 2601 byte[] old = buf; 2602 buf = new byte[Integer.highestOneBit(needed) << 1]; 2603 System.arraycopy(old, 0, buf, 0, old.length); 2604 } 2605 return buf; 2606 } 2607 2608 /** We can only read a single class file at a time; this 2609 * flag keeps track of when we are currently reading a class 2610 * file. 2611 */ 2612 public boolean filling = false; 2613 2614/************************************************************************ 2615 * Adjusting flags 2616 ***********************************************************************/ 2617 2618 long adjustFieldFlags(long flags) { 2619 return flags; 2620 } 2621 2622 long adjustMethodFlags(long flags) { 2623 if ((flags & ACC_BRIDGE) != 0) { 2624 flags &= ~ACC_BRIDGE; 2625 flags |= BRIDGE; 2626 } 2627 if ((flags & ACC_VARARGS) != 0) { 2628 flags &= ~ACC_VARARGS; 2629 flags |= VARARGS; 2630 } 2631 return flags; 2632 } 2633 2634 long adjustClassFlags(long flags) { 2635 if ((flags & ACC_MODULE) != 0) { 2636 flags &= ~ACC_MODULE; 2637 flags |= MODULE; 2638 } 2639 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded 2640 } 2641 2642 /** 2643 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 2644 * The attribute is only the last component of the original filename, so is unlikely 2645 * to be valid as is, so operations other than those to access the name throw 2646 * UnsupportedOperationException 2647 */ 2648 private static class SourceFileObject implements JavaFileObject { 2649 2650 /** The file's name. 2651 */ 2652 private final Name name; 2653 private final Name flatname; 2654 2655 public SourceFileObject(Name name, Name flatname) { 2656 this.name = name; 2657 this.flatname = flatname; 2658 } 2659 2660 @Override @DefinedBy(Api.COMPILER) 2661 public URI toUri() { 2662 try { 2663 return new URI(null, name.toString(), null); 2664 } catch (URISyntaxException e) { 2665 throw new PathFileObject.CannotCreateUriError(name.toString(), e); 2666 } 2667 } 2668 2669 @Override @DefinedBy(Api.COMPILER) 2670 public String getName() { 2671 return name.toString(); 2672 } 2673 2674 @Override @DefinedBy(Api.COMPILER) 2675 public JavaFileObject.Kind getKind() { 2676 return BaseFileManager.getKind(getName()); 2677 } 2678 2679 @Override @DefinedBy(Api.COMPILER) 2680 public InputStream openInputStream() { 2681 throw new UnsupportedOperationException(); 2682 } 2683 2684 @Override @DefinedBy(Api.COMPILER) 2685 public OutputStream openOutputStream() { 2686 throw new UnsupportedOperationException(); 2687 } 2688 2689 @Override @DefinedBy(Api.COMPILER) 2690 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 2691 throw new UnsupportedOperationException(); 2692 } 2693 2694 @Override @DefinedBy(Api.COMPILER) 2695 public Reader openReader(boolean ignoreEncodingErrors) { 2696 throw new UnsupportedOperationException(); 2697 } 2698 2699 @Override @DefinedBy(Api.COMPILER) 2700 public Writer openWriter() { 2701 throw new UnsupportedOperationException(); 2702 } 2703 2704 @Override @DefinedBy(Api.COMPILER) 2705 public long getLastModified() { 2706 throw new UnsupportedOperationException(); 2707 } 2708 2709 @Override @DefinedBy(Api.COMPILER) 2710 public boolean delete() { 2711 throw new UnsupportedOperationException(); 2712 } 2713 2714 @Override @DefinedBy(Api.COMPILER) 2715 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 2716 return true; // fail-safe mode 2717 } 2718 2719 @Override @DefinedBy(Api.COMPILER) 2720 public NestingKind getNestingKind() { 2721 return null; 2722 } 2723 2724 @Override @DefinedBy(Api.COMPILER) 2725 public Modifier getAccessLevel() { 2726 return null; 2727 } 2728 2729 /** 2730 * Check if two file objects are equal. 2731 * SourceFileObjects are just placeholder objects for the value of a 2732 * SourceFile attribute, and do not directly represent specific files. 2733 * Two SourceFileObjects are equal if their names are equal. 2734 */ 2735 @Override 2736 public boolean equals(Object other) { 2737 if (this == other) 2738 return true; 2739 2740 if (!(other instanceof SourceFileObject)) 2741 return false; 2742 2743 SourceFileObject o = (SourceFileObject) other; 2744 return name.equals(o.name); 2745 } 2746 2747 @Override 2748 public int hashCode() { 2749 return name.hashCode(); 2750 } 2751 } 2752 2753 private class CompleterDeproxy implements AnnotationTypeCompleter { 2754 ClassSymbol proxyOn; 2755 CompoundAnnotationProxy target; 2756 CompoundAnnotationProxy repeatable; 2757 2758 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target, 2759 CompoundAnnotationProxy repeatable) 2760 { 2761 this.proxyOn = c; 2762 this.target = target; 2763 this.repeatable = repeatable; 2764 } 2765 2766 @Override 2767 public void complete(ClassSymbol sym) { 2768 Assert.check(proxyOn == sym); 2769 Attribute.Compound theTarget = null, theRepeatable = null; 2770 AnnotationDeproxy deproxy; 2771 2772 try { 2773 if (target != null) { 2774 deproxy = new AnnotationDeproxy(proxyOn); 2775 theTarget = deproxy.deproxyCompound(target); 2776 } 2777 2778 if (repeatable != null) { 2779 deproxy = new AnnotationDeproxy(proxyOn); 2780 theRepeatable = deproxy.deproxyCompound(repeatable); 2781 } 2782 } catch (Exception e) { 2783 throw new CompletionFailure(sym, e.getMessage()); 2784 } 2785 2786 sym.getAnnotationTypeMetadata().setTarget(theTarget); 2787 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable); 2788 } 2789 } 2790 2791 private static final class InterimUsesDirective { 2792 public final Name service; 2793 2794 public InterimUsesDirective(Name service) { 2795 this.service = service; 2796 } 2797 2798 } 2799 2800 private static final class InterimProvidesDirective { 2801 public final Name service; 2802 public final Name impl; 2803 2804 public InterimProvidesDirective(Name service, Name impl) { 2805 this.service = service; 2806 this.impl = impl; 2807 } 2808 2809 } 2810 2811 private final class UsesProvidesCompleter implements Completer { 2812 private final ModuleSymbol currentModule; 2813 private final List<InterimUsesDirective> interimUsesCopy; 2814 private final List<InterimProvidesDirective> interimProvidesCopy; 2815 2816 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) { 2817 this.currentModule = currentModule; 2818 this.interimUsesCopy = interimUsesCopy; 2819 this.interimProvidesCopy = interimProvidesCopy; 2820 } 2821 2822 @Override 2823 public void complete(Symbol sym) throws CompletionFailure { 2824 ListBuffer<Directive> directives = new ListBuffer<>(); 2825 directives.addAll(currentModule.directives); 2826 ListBuffer<UsesDirective> uses = new ListBuffer<>(); 2827 for (InterimUsesDirective interim : interimUsesCopy) { 2828 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service)); 2829 uses.add(d); 2830 directives.add(d); 2831 } 2832 currentModule.uses = uses.toList(); 2833 ListBuffer<ProvidesDirective> provides = new ListBuffer<>(); 2834 for (InterimProvidesDirective interim : interimProvidesCopy) { 2835 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service), 2836 syms.enterClass(currentModule, interim.impl)); 2837 provides.add(d); 2838 directives.add(d); 2839 } 2840 currentModule.provides = provides.toList(); 2841 currentModule.directives = directives.toList(); 2842 } 2843 } 2844} 2845