ClassReader.java revision 4035:0873c6b6d28f
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.util.*; 61import com.sun.tools.javac.util.DefinedBy.Api; 62import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 63 64import static com.sun.tools.javac.code.Flags.*; 65import static com.sun.tools.javac.code.Kinds.Kind.*; 66 67import com.sun.tools.javac.code.Scope.LookupKind; 68 69import static com.sun.tools.javac.code.TypeTag.ARRAY; 70import static com.sun.tools.javac.code.TypeTag.CLASS; 71import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 72import static com.sun.tools.javac.jvm.ClassFile.*; 73import static com.sun.tools.javac.jvm.ClassFile.Version.*; 74 75import static com.sun.tools.javac.main.Option.PARAMETERS; 76 77/** This class provides operations to read a classfile into an internal 78 * representation. The internal representation is anchored in a 79 * ClassSymbol which contains in its scope symbol representations 80 * for all other definitions in the classfile. Top-level Classes themselves 81 * appear as members of the scopes of PackageSymbols. 82 * 83 * <p><b>This is NOT part of any supported API. 84 * If you write code that depends on this, you do so at your own risk. 85 * This code and its internal interfaces are subject to change or 86 * deletion without notice.</b> 87 */ 88public class ClassReader { 89 /** The context key for the class reader. */ 90 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 91 92 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 93 94 private final Annotate annotate; 95 96 /** Switch: verbose output. 97 */ 98 boolean verbose; 99 100 /** Switch: read constant pool and code sections. This switch is initially 101 * set to false but can be turned on from outside. 102 */ 103 public boolean readAllOfClassFile = false; 104 105 /** Switch: allow simplified varargs. 106 */ 107 boolean allowSimplifiedVarargs; 108 109 /** Switch: allow modules. 110 */ 111 boolean allowModules; 112 113 /** Lint option: warn about classfile issues 114 */ 115 boolean lintClassfile; 116 117 /** Switch: preserve parameter names from the variable table. 118 */ 119 public boolean saveParameterNames; 120 121 /** 122 * The currently selected profile. 123 */ 124 public final Profile profile; 125 126 /** The log to use for verbose output 127 */ 128 final Log log; 129 130 /** The symbol table. */ 131 Symtab syms; 132 133 Types types; 134 135 /** The name table. */ 136 final Names names; 137 138 /** Access to files 139 */ 140 private final JavaFileManager fileManager; 141 142 /** Factory for diagnostics 143 */ 144 JCDiagnostic.Factory diagFactory; 145 146 /** The current scope where type variables are entered. 147 */ 148 protected WriteableScope typevars; 149 150 private List<InterimUsesDirective> interimUses = List.nil(); 151 private List<InterimProvidesDirective> interimProvides = List.nil(); 152 153 /** The path name of the class file currently being read. 154 */ 155 protected JavaFileObject currentClassFile = null; 156 157 /** The class or method currently being read. 158 */ 159 protected Symbol currentOwner = null; 160 161 /** The module containing the class currently being read. 162 */ 163 protected ModuleSymbol currentModule = null; 164 165 /** The buffer containing the currently read class file. 166 */ 167 byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 168 169 /** The current input pointer. 170 */ 171 protected int bp; 172 173 /** The objects of the constant pool. 174 */ 175 Object[] poolObj; 176 177 /** For every constant pool entry, an index into buf where the 178 * defining section of the entry is found. 179 */ 180 int[] poolIdx; 181 182 /** The major version number of the class file being read. */ 183 int majorVersion; 184 /** The minor version number of the class file being read. */ 185 int minorVersion; 186 187 /** A table to hold the constant pool indices for method parameter 188 * names, as given in LocalVariableTable attributes. 189 */ 190 int[] parameterNameIndices; 191 192 /** 193 * Whether or not any parameter names have been found. 194 */ 195 boolean haveParameterNameIndices; 196 197 /** Set this to false every time we start reading a method 198 * and are saving parameter names. Set it to true when we see 199 * MethodParameters, if it's set when we see a LocalVariableTable, 200 * then we ignore the parameter names from the LVT. 201 */ 202 boolean sawMethodParameters; 203 204 /** 205 * The set of attribute names for which warnings have been generated for the current class 206 */ 207 Set<Name> warnedAttrs = new HashSet<>(); 208 209 /** 210 * The prototype @Target Attribute.Compound if this class is an annotation annotated with 211 * @Target 212 */ 213 CompoundAnnotationProxy target; 214 215 /** 216 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with 217 * @Repeatable 218 */ 219 CompoundAnnotationProxy repeatable; 220 221 /** Get the ClassReader instance for this invocation. */ 222 public static ClassReader instance(Context context) { 223 ClassReader instance = context.get(classReaderKey); 224 if (instance == null) 225 instance = new ClassReader(context); 226 return instance; 227 } 228 229 /** Construct a new class reader. */ 230 protected ClassReader(Context context) { 231 context.put(classReaderKey, this); 232 annotate = Annotate.instance(context); 233 names = Names.instance(context); 234 syms = Symtab.instance(context); 235 types = Types.instance(context); 236 fileManager = context.get(JavaFileManager.class); 237 if (fileManager == null) 238 throw new AssertionError("FileManager initialization error"); 239 diagFactory = JCDiagnostic.Factory.instance(context); 240 241 log = Log.instance(context); 242 243 Options options = Options.instance(context); 244 verbose = options.isSet(Option.VERBOSE); 245 246 Source source = Source.instance(context); 247 allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 248 allowModules = source.allowModules(); 249 250 saveParameterNames = options.isSet(PARAMETERS); 251 252 profile = Profile.instance(context); 253 254 typevars = WriteableScope.create(syms.noSymbol); 255 256 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 257 258 initAttributeReaders(); 259 } 260 261 /** Add member to class unless it is synthetic. 262 */ 263 private void enterMember(ClassSymbol c, Symbol sym) { 264 // Synthetic members are not entered -- reason lost to history (optimization?). 265 // Lambda methods must be entered because they may have inner classes (which reference them) 266 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 267 c.members_field.enter(sym); 268 } 269 270/************************************************************************ 271 * Error Diagnoses 272 ***********************************************************************/ 273 274 public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 275 return new ClassFinder.BadClassFile ( 276 currentOwner.enclClass(), 277 currentClassFile, 278 diagFactory.fragment(key, args), 279 diagFactory); 280 } 281 282 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Object... args) { 283 return new ClassFinder.BadEnclosingMethodAttr ( 284 currentOwner.enclClass(), 285 currentClassFile, 286 diagFactory.fragment("bad.enclosing.method", args), 287 diagFactory); 288 } 289 290/************************************************************************ 291 * Buffer Access 292 ***********************************************************************/ 293 294 /** Read a character. 295 */ 296 char nextChar() { 297 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 298 } 299 300 /** Read a byte. 301 */ 302 int nextByte() { 303 return buf[bp++] & 0xFF; 304 } 305 306 /** Read an integer. 307 */ 308 int nextInt() { 309 return 310 ((buf[bp++] & 0xFF) << 24) + 311 ((buf[bp++] & 0xFF) << 16) + 312 ((buf[bp++] & 0xFF) << 8) + 313 (buf[bp++] & 0xFF); 314 } 315 316 /** Extract a character at position bp from buf. 317 */ 318 char getChar(int bp) { 319 return 320 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 321 } 322 323 /** Extract an integer at position bp from buf. 324 */ 325 int getInt(int bp) { 326 return 327 ((buf[bp] & 0xFF) << 24) + 328 ((buf[bp+1] & 0xFF) << 16) + 329 ((buf[bp+2] & 0xFF) << 8) + 330 (buf[bp+3] & 0xFF); 331 } 332 333 334 /** Extract a long integer at position bp from buf. 335 */ 336 long getLong(int bp) { 337 DataInputStream bufin = 338 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 339 try { 340 return bufin.readLong(); 341 } catch (IOException e) { 342 throw new AssertionError(e); 343 } 344 } 345 346 /** Extract a float at position bp from buf. 347 */ 348 float getFloat(int bp) { 349 DataInputStream bufin = 350 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 351 try { 352 return bufin.readFloat(); 353 } catch (IOException e) { 354 throw new AssertionError(e); 355 } 356 } 357 358 /** Extract a double at position bp from buf. 359 */ 360 double getDouble(int bp) { 361 DataInputStream bufin = 362 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 363 try { 364 return bufin.readDouble(); 365 } catch (IOException e) { 366 throw new AssertionError(e); 367 } 368 } 369 370/************************************************************************ 371 * Constant Pool Access 372 ***********************************************************************/ 373 374 /** Index all constant pool entries, writing their start addresses into 375 * poolIdx. 376 */ 377 void indexPool() { 378 poolIdx = new int[nextChar()]; 379 poolObj = new Object[poolIdx.length]; 380 int i = 1; 381 while (i < poolIdx.length) { 382 poolIdx[i++] = bp; 383 byte tag = buf[bp++]; 384 switch (tag) { 385 case CONSTANT_Utf8: case CONSTANT_Unicode: { 386 int len = nextChar(); 387 bp = bp + len; 388 break; 389 } 390 case CONSTANT_Class: 391 case CONSTANT_String: 392 case CONSTANT_MethodType: 393 case CONSTANT_Module: 394 case CONSTANT_Package: 395 bp = bp + 2; 396 break; 397 case CONSTANT_MethodHandle: 398 bp = bp + 3; 399 break; 400 case CONSTANT_Fieldref: 401 case CONSTANT_Methodref: 402 case CONSTANT_InterfaceMethodref: 403 case CONSTANT_NameandType: 404 case CONSTANT_Integer: 405 case CONSTANT_Float: 406 case CONSTANT_InvokeDynamic: 407 bp = bp + 4; 408 break; 409 case CONSTANT_Long: 410 case CONSTANT_Double: 411 bp = bp + 8; 412 i++; 413 break; 414 default: 415 throw badClassFile("bad.const.pool.tag.at", 416 Byte.toString(tag), 417 Integer.toString(bp -1)); 418 } 419 } 420 } 421 422 /** Read constant pool entry at start address i, use pool as a cache. 423 */ 424 Object readPool(int i) { 425 Object result = poolObj[i]; 426 if (result != null) return result; 427 428 int index = poolIdx[i]; 429 if (index == 0) return null; 430 431 byte tag = buf[index]; 432 switch (tag) { 433 case CONSTANT_Utf8: 434 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 435 break; 436 case CONSTANT_Unicode: 437 throw badClassFile("unicode.str.not.supported"); 438 case CONSTANT_Class: 439 poolObj[i] = readClassOrType(getChar(index + 1)); 440 break; 441 case CONSTANT_String: 442 // FIXME: (footprint) do not use toString here 443 poolObj[i] = readName(getChar(index + 1)).toString(); 444 break; 445 case CONSTANT_Fieldref: { 446 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 447 NameAndType nt = readNameAndType(getChar(index + 3)); 448 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 449 break; 450 } 451 case CONSTANT_Methodref: 452 case CONSTANT_InterfaceMethodref: { 453 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 454 NameAndType nt = readNameAndType(getChar(index + 3)); 455 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 456 break; 457 } 458 case CONSTANT_NameandType: 459 poolObj[i] = new NameAndType( 460 readName(getChar(index + 1)), 461 readType(getChar(index + 3)), types); 462 break; 463 case CONSTANT_Integer: 464 poolObj[i] = getInt(index + 1); 465 break; 466 case CONSTANT_Float: 467 poolObj[i] = Float.valueOf(getFloat(index + 1)); 468 break; 469 case CONSTANT_Long: 470 poolObj[i] = Long.valueOf(getLong(index + 1)); 471 break; 472 case CONSTANT_Double: 473 poolObj[i] = Double.valueOf(getDouble(index + 1)); 474 break; 475 case CONSTANT_MethodHandle: 476 skipBytes(4); 477 break; 478 case CONSTANT_MethodType: 479 skipBytes(3); 480 break; 481 case CONSTANT_InvokeDynamic: 482 skipBytes(5); 483 break; 484 case CONSTANT_Module: 485 case CONSTANT_Package: 486 // this is temporary for now: treat as a simple reference to the underlying Utf8. 487 poolObj[i] = readName(getChar(index + 1)); 488 break; 489 default: 490 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 491 } 492 return poolObj[i]; 493 } 494 495 /** Read signature and convert to type. 496 */ 497 Type readType(int i) { 498 int index = poolIdx[i]; 499 return sigToType(buf, index + 3, getChar(index + 1)); 500 } 501 502 /** If name is an array type or class signature, return the 503 * corresponding type; otherwise return a ClassSymbol with given name. 504 */ 505 Object readClassOrType(int i) { 506 int index = poolIdx[i]; 507 int len = getChar(index + 1); 508 int start = index + 3; 509 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 510 // by the above assertion, the following test can be 511 // simplified to (buf[start] == '[') 512 return (buf[start] == '[' || buf[start + len - 1] == ';') 513 ? (Object)sigToType(buf, start, len) 514 : (Object)enterClass(names.fromUtf(internalize(buf, start, 515 len))); 516 } 517 518 /** Read signature and convert to type parameters. 519 */ 520 List<Type> readTypeParams(int i) { 521 int index = poolIdx[i]; 522 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 523 } 524 525 /** Read class entry. 526 */ 527 ClassSymbol readClassSymbol(int i) { 528 Object obj = readPool(i); 529 if (obj != null && !(obj instanceof ClassSymbol)) 530 throw badClassFile("bad.const.pool.entry", 531 currentClassFile.toString(), 532 "CONSTANT_Class_info", i); 533 return (ClassSymbol)obj; 534 } 535 536 Name readClassName(int i) { 537 int index = poolIdx[i]; 538 if (index == 0) return null; 539 byte tag = buf[index]; 540 if (tag != CONSTANT_Class) { 541 throw badClassFile("bad.const.pool.entry", 542 currentClassFile.toString(), 543 "CONSTANT_Class_info", i); 544 } 545 int nameIndex = poolIdx[getChar(index + 1)]; 546 int len = getChar(nameIndex + 1); 547 int start = nameIndex + 3; 548 if (buf[start] == '[' || buf[start + len - 1] == ';') 549 throw badClassFile("wrong class name"); //TODO: proper diagnostics 550 return names.fromUtf(internalize(buf, start, len)); 551 } 552 553 /** Read name. 554 */ 555 Name readName(int i) { 556 Object obj = readPool(i); 557 if (obj != null && !(obj instanceof Name)) 558 throw badClassFile("bad.const.pool.entry", 559 currentClassFile.toString(), 560 "CONSTANT_Utf8_info or CONSTANT_String_info", i); 561 return (Name)obj; 562 } 563 564 /** Read name and type. 565 */ 566 NameAndType readNameAndType(int i) { 567 Object obj = readPool(i); 568 if (obj != null && !(obj instanceof NameAndType)) 569 throw badClassFile("bad.const.pool.entry", 570 currentClassFile.toString(), 571 "CONSTANT_NameAndType_info", i); 572 return (NameAndType)obj; 573 } 574 575 /** Read the name of a module. 576 * The name is stored in a CONSTANT_Module entry, in 577 * JVMS 4.2 binary form (using ".", not "/") 578 */ 579 Name readModuleName(int i) { 580 return readName(i); 581 } 582 583 /** Read module_flags. 584 */ 585 Set<ModuleFlags> readModuleFlags(int flags) { 586 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class); 587 for (ModuleFlags f : ModuleFlags.values()) { 588 if ((flags & f.value) != 0) 589 set.add(f); 590 } 591 return set; 592 } 593 594 /** Read resolution_flags. 595 */ 596 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) { 597 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class); 598 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) { 599 if ((flags & f.value) != 0) 600 set.add(f); 601 } 602 return set; 603 } 604 605 /** Read exports_flags. 606 */ 607 Set<ExportsFlag> readExportsFlags(int flags) { 608 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class); 609 for (ExportsFlag f: ExportsFlag.values()) { 610 if ((flags & f.value) != 0) 611 set.add(f); 612 } 613 return set; 614 } 615 616 /** Read opens_flags. 617 */ 618 Set<OpensFlag> readOpensFlags(int flags) { 619 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class); 620 for (OpensFlag f: OpensFlag.values()) { 621 if ((flags & f.value) != 0) 622 set.add(f); 623 } 624 return set; 625 } 626 627 /** Read requires_flags. 628 */ 629 Set<RequiresFlag> readRequiresFlags(int flags) { 630 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class); 631 for (RequiresFlag f: RequiresFlag.values()) { 632 if ((flags & f.value) != 0) 633 set.add(f); 634 } 635 return set; 636 } 637 638/************************************************************************ 639 * Reading Types 640 ***********************************************************************/ 641 642 /** The unread portion of the currently read type is 643 * signature[sigp..siglimit-1]. 644 */ 645 byte[] signature; 646 int sigp; 647 int siglimit; 648 boolean sigEnterPhase = false; 649 650 /** Convert signature to type, where signature is a byte array segment. 651 */ 652 Type sigToType(byte[] sig, int offset, int len) { 653 signature = sig; 654 sigp = offset; 655 siglimit = offset + len; 656 return sigToType(); 657 } 658 659 /** Convert signature to type, where signature is implicit. 660 */ 661 Type sigToType() { 662 switch ((char) signature[sigp]) { 663 case 'T': 664 sigp++; 665 int start = sigp; 666 while (signature[sigp] != ';') sigp++; 667 sigp++; 668 return sigEnterPhase 669 ? Type.noType 670 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 671 case '+': { 672 sigp++; 673 Type t = sigToType(); 674 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 675 } 676 case '*': 677 sigp++; 678 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 679 syms.boundClass); 680 case '-': { 681 sigp++; 682 Type t = sigToType(); 683 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 684 } 685 case 'B': 686 sigp++; 687 return syms.byteType; 688 case 'C': 689 sigp++; 690 return syms.charType; 691 case 'D': 692 sigp++; 693 return syms.doubleType; 694 case 'F': 695 sigp++; 696 return syms.floatType; 697 case 'I': 698 sigp++; 699 return syms.intType; 700 case 'J': 701 sigp++; 702 return syms.longType; 703 case 'L': 704 { 705 // int oldsigp = sigp; 706 Type t = classSigToType(); 707 if (sigp < siglimit && signature[sigp] == '.') 708 throw badClassFile("deprecated inner class signature syntax " + 709 "(please recompile from source)"); 710 /* 711 System.err.println(" decoded " + 712 new String(signature, oldsigp, sigp-oldsigp) + 713 " => " + t + " outer " + t.outer()); 714 */ 715 return t; 716 } 717 case 'S': 718 sigp++; 719 return syms.shortType; 720 case 'V': 721 sigp++; 722 return syms.voidType; 723 case 'Z': 724 sigp++; 725 return syms.booleanType; 726 case '[': 727 sigp++; 728 return new ArrayType(sigToType(), syms.arrayClass); 729 case '(': 730 sigp++; 731 List<Type> argtypes = sigToTypes(')'); 732 Type restype = sigToType(); 733 List<Type> thrown = List.nil(); 734 while (signature[sigp] == '^') { 735 sigp++; 736 thrown = thrown.prepend(sigToType()); 737 } 738 // if there is a typevar in the throws clause we should state it. 739 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 740 if (l.head.hasTag(TYPEVAR)) { 741 l.head.tsym.flags_field |= THROWS; 742 } 743 } 744 return new MethodType(argtypes, 745 restype, 746 thrown.reverse(), 747 syms.methodClass); 748 case '<': 749 typevars = typevars.dup(currentOwner); 750 Type poly = new ForAll(sigToTypeParams(), sigToType()); 751 typevars = typevars.leave(); 752 return poly; 753 default: 754 throw badClassFile("bad.signature", 755 Convert.utf2string(signature, sigp, 10)); 756 } 757 } 758 759 byte[] signatureBuffer = new byte[0]; 760 int sbp = 0; 761 /** Convert class signature to type, where signature is implicit. 762 */ 763 Type classSigToType() { 764 if (signature[sigp] != 'L') 765 throw badClassFile("bad.class.signature", 766 Convert.utf2string(signature, sigp, 10)); 767 sigp++; 768 Type outer = Type.noType; 769 int startSbp = sbp; 770 771 while (true) { 772 final byte c = signature[sigp++]; 773 switch (c) { 774 775 case ';': { // end 776 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 777 startSbp, 778 sbp - startSbp)); 779 780 try { 781 return (outer == Type.noType) ? 782 t.erasure(types) : 783 new ClassType(outer, List.nil(), t); 784 } finally { 785 sbp = startSbp; 786 } 787 } 788 789 case '<': // generic arguments 790 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 791 startSbp, 792 sbp - startSbp)); 793 outer = new ClassType(outer, sigToTypes('>'), t) { 794 boolean completed = false; 795 @Override @DefinedBy(Api.LANGUAGE_MODEL) 796 public Type getEnclosingType() { 797 if (!completed) { 798 completed = true; 799 tsym.complete(); 800 Type enclosingType = tsym.type.getEnclosingType(); 801 if (enclosingType != Type.noType) { 802 List<Type> typeArgs = 803 super.getEnclosingType().allparams(); 804 List<Type> typeParams = 805 enclosingType.allparams(); 806 if (typeParams.length() != typeArgs.length()) { 807 // no "rare" types 808 super.setEnclosingType(types.erasure(enclosingType)); 809 } else { 810 super.setEnclosingType(types.subst(enclosingType, 811 typeParams, 812 typeArgs)); 813 } 814 } else { 815 super.setEnclosingType(Type.noType); 816 } 817 } 818 return super.getEnclosingType(); 819 } 820 @Override 821 public void setEnclosingType(Type outer) { 822 throw new UnsupportedOperationException(); 823 } 824 }; 825 switch (signature[sigp++]) { 826 case ';': 827 if (sigp < signature.length && signature[sigp] == '.') { 828 // support old-style GJC signatures 829 // The signature produced was 830 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 831 // rather than say 832 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 833 // so we skip past ".Lfoo/Outer$" 834 sigp += (sbp - startSbp) + // "foo/Outer" 835 3; // ".L" and "$" 836 signatureBuffer[sbp++] = (byte)'$'; 837 break; 838 } else { 839 sbp = startSbp; 840 return outer; 841 } 842 case '.': 843 signatureBuffer[sbp++] = (byte)'$'; 844 break; 845 default: 846 throw new AssertionError(signature[sigp-1]); 847 } 848 continue; 849 850 case '.': 851 //we have seen an enclosing non-generic class 852 if (outer != Type.noType) { 853 t = enterClass(names.fromUtf(signatureBuffer, 854 startSbp, 855 sbp - startSbp)); 856 outer = new ClassType(outer, List.nil(), t); 857 } 858 signatureBuffer[sbp++] = (byte)'$'; 859 continue; 860 case '/': 861 signatureBuffer[sbp++] = (byte)'.'; 862 continue; 863 default: 864 signatureBuffer[sbp++] = c; 865 continue; 866 } 867 } 868 } 869 870 /** Convert (implicit) signature to list of types 871 * until `terminator' is encountered. 872 */ 873 List<Type> sigToTypes(char terminator) { 874 List<Type> head = List.of(null); 875 List<Type> tail = head; 876 while (signature[sigp] != terminator) 877 tail = tail.setTail(List.of(sigToType())); 878 sigp++; 879 return head.tail; 880 } 881 882 /** Convert signature to type parameters, where signature is a byte 883 * array segment. 884 */ 885 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 886 signature = sig; 887 sigp = offset; 888 siglimit = offset + len; 889 return sigToTypeParams(); 890 } 891 892 /** Convert signature to type parameters, where signature is implicit. 893 */ 894 List<Type> sigToTypeParams() { 895 List<Type> tvars = List.nil(); 896 if (signature[sigp] == '<') { 897 sigp++; 898 int start = sigp; 899 sigEnterPhase = true; 900 while (signature[sigp] != '>') 901 tvars = tvars.prepend(sigToTypeParam()); 902 sigEnterPhase = false; 903 sigp = start; 904 while (signature[sigp] != '>') 905 sigToTypeParam(); 906 sigp++; 907 } 908 return tvars.reverse(); 909 } 910 911 /** Convert (implicit) signature to type parameter. 912 */ 913 Type sigToTypeParam() { 914 int start = sigp; 915 while (signature[sigp] != ':') sigp++; 916 Name name = names.fromUtf(signature, start, sigp - start); 917 TypeVar tvar; 918 if (sigEnterPhase) { 919 tvar = new TypeVar(name, currentOwner, syms.botType); 920 typevars.enter(tvar.tsym); 921 } else { 922 tvar = (TypeVar)findTypeVar(name); 923 } 924 List<Type> bounds = List.nil(); 925 boolean allInterfaces = false; 926 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 927 sigp++; 928 allInterfaces = true; 929 } 930 while (signature[sigp] == ':') { 931 sigp++; 932 bounds = bounds.prepend(sigToType()); 933 } 934 if (!sigEnterPhase) { 935 types.setBounds(tvar, bounds.reverse(), allInterfaces); 936 } 937 return tvar; 938 } 939 940 /** Find type variable with given name in `typevars' scope. 941 */ 942 Type findTypeVar(Name name) { 943 Symbol s = typevars.findFirst(name); 944 if (s != null) { 945 return s.type; 946 } else { 947 if (readingClassAttr) { 948 // While reading the class attribute, the supertypes 949 // might refer to a type variable from an enclosing element 950 // (method or class). 951 // If the type variable is defined in the enclosing class, 952 // we can actually find it in 953 // currentOwner.owner.type.getTypeArguments() 954 // However, until we have read the enclosing method attribute 955 // we don't know for sure if this owner is correct. It could 956 // be a method and there is no way to tell before reading the 957 // enclosing method attribute. 958 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 959 missingTypeVariables = missingTypeVariables.prepend(t); 960 // System.err.println("Missing type var " + name); 961 return t; 962 } 963 throw badClassFile("undecl.type.var", name); 964 } 965 } 966 967/************************************************************************ 968 * Reading Attributes 969 ***********************************************************************/ 970 971 protected enum AttributeKind { CLASS, MEMBER } 972 973 protected abstract class AttributeReader { 974 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 975 this.name = name; 976 this.version = version; 977 this.kinds = kinds; 978 } 979 980 protected boolean accepts(AttributeKind kind) { 981 if (kinds.contains(kind)) { 982 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 983 return true; 984 985 if (lintClassfile && !warnedAttrs.contains(name)) { 986 JavaFileObject prev = log.useSource(currentClassFile); 987 try { 988 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr", 989 name, version.major, version.minor, majorVersion, minorVersion); 990 } finally { 991 log.useSource(prev); 992 } 993 warnedAttrs.add(name); 994 } 995 } 996 return false; 997 } 998 999 protected abstract void read(Symbol sym, int attrLen); 1000 1001 protected final Name name; 1002 protected final ClassFile.Version version; 1003 protected final Set<AttributeKind> kinds; 1004 } 1005 1006 protected Set<AttributeKind> CLASS_ATTRIBUTE = 1007 EnumSet.of(AttributeKind.CLASS); 1008 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 1009 EnumSet.of(AttributeKind.MEMBER); 1010 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 1011 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 1012 1013 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 1014 1015 private void initAttributeReaders() { 1016 AttributeReader[] readers = { 1017 // v45.3 attributes 1018 1019 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 1020 protected void read(Symbol sym, int attrLen) { 1021 if (readAllOfClassFile || saveParameterNames) 1022 ((MethodSymbol)sym).code = readCode(sym); 1023 else 1024 bp = bp + attrLen; 1025 } 1026 }, 1027 1028 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 1029 protected void read(Symbol sym, int attrLen) { 1030 Object v = readPool(nextChar()); 1031 // Ignore ConstantValue attribute if field not final. 1032 if ((sym.flags() & FINAL) == 0) { 1033 return; 1034 } 1035 VarSymbol var = (VarSymbol) sym; 1036 switch (var.type.getTag()) { 1037 case BOOLEAN: 1038 case BYTE: 1039 case CHAR: 1040 case SHORT: 1041 case INT: 1042 checkType(var, Integer.class, v); 1043 break; 1044 case LONG: 1045 checkType(var, Long.class, v); 1046 break; 1047 case FLOAT: 1048 checkType(var, Float.class, v); 1049 break; 1050 case DOUBLE: 1051 checkType(var, Double.class, v); 1052 break; 1053 case CLASS: 1054 Assert.check(var.type.tsym == syms.stringType.tsym); 1055 checkType(var, String.class, v); 1056 break; 1057 default: 1058 // ignore ConstantValue attribute if type is not primitive or String 1059 return; 1060 } 1061 if (v instanceof Integer && !var.type.getTag().checkRange((Integer) v)) { 1062 throw badClassFile("bad.constant.range", v, var, var.type); 1063 } 1064 var.setData(v); 1065 } 1066 1067 void checkType(Symbol var, Class<?> clazz, Object value) { 1068 if (!clazz.isInstance(value)) { 1069 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName()); 1070 } 1071 } 1072 }, 1073 1074 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1075 protected void read(Symbol sym, int attrLen) { 1076 Symbol s = sym.owner.kind == MDL ? sym.owner : sym; 1077 1078 s.flags_field |= DEPRECATED; 1079 } 1080 }, 1081 1082 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1083 protected void read(Symbol sym, int attrLen) { 1084 int nexceptions = nextChar(); 1085 List<Type> thrown = List.nil(); 1086 for (int j = 0; j < nexceptions; j++) 1087 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 1088 if (sym.type.getThrownTypes().isEmpty()) 1089 sym.type.asMethodType().thrown = thrown.reverse(); 1090 } 1091 }, 1092 1093 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 1094 protected void read(Symbol sym, int attrLen) { 1095 ClassSymbol c = (ClassSymbol) sym; 1096 if (currentModule.module_info == c) { 1097 //prevent entering the classes too soon: 1098 skipInnerClasses(); 1099 } else { 1100 readInnerClasses(c); 1101 } 1102 } 1103 }, 1104 1105 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1106 protected void read(Symbol sym, int attrLen) { 1107 int newbp = bp + attrLen; 1108 if (saveParameterNames && !sawMethodParameters) { 1109 // Pick up parameter names from the variable table. 1110 // Parameter names are not explicitly identified as such, 1111 // but all parameter name entries in the LocalVariableTable 1112 // have a start_pc of 0. Therefore, we record the name 1113 // indicies of all slots with a start_pc of zero in the 1114 // parameterNameIndicies array. 1115 // Note that this implicitly honors the JVMS spec that 1116 // there may be more than one LocalVariableTable, and that 1117 // there is no specified ordering for the entries. 1118 int numEntries = nextChar(); 1119 for (int i = 0; i < numEntries; i++) { 1120 int start_pc = nextChar(); 1121 int length = nextChar(); 1122 int nameIndex = nextChar(); 1123 int sigIndex = nextChar(); 1124 int register = nextChar(); 1125 if (start_pc == 0) { 1126 // ensure array large enough 1127 if (register >= parameterNameIndices.length) { 1128 int newSize = 1129 Math.max(register + 1, parameterNameIndices.length + 8); 1130 parameterNameIndices = 1131 Arrays.copyOf(parameterNameIndices, newSize); 1132 } 1133 parameterNameIndices[register] = nameIndex; 1134 haveParameterNameIndices = true; 1135 } 1136 } 1137 } 1138 bp = newbp; 1139 } 1140 }, 1141 1142 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1143 protected void read(Symbol sym, int attrLen) { 1144 ClassSymbol c = (ClassSymbol) sym; 1145 Name n = readName(nextChar()); 1146 c.sourcefile = new SourceFileObject(n, c.flatname); 1147 // If the class is a toplevel class, originating from a Java source file, 1148 // but the class name does not match the file name, then it is 1149 // an auxiliary class. 1150 String sn = n.toString(); 1151 if (c.owner.kind == PCK && 1152 sn.endsWith(".java") && 1153 !sn.equals(c.name.toString()+".java")) { 1154 c.flags_field |= AUXILIARY; 1155 } 1156 } 1157 }, 1158 1159 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1160 protected void read(Symbol sym, int attrLen) { 1161 sym.flags_field |= SYNTHETIC; 1162 } 1163 }, 1164 1165 // standard v49 attributes 1166 1167 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1168 protected void read(Symbol sym, int attrLen) { 1169 int newbp = bp + attrLen; 1170 readEnclosingMethodAttr(sym); 1171 bp = newbp; 1172 } 1173 }, 1174 1175 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1176 protected void read(Symbol sym, int attrLen) { 1177 if (sym.kind == TYP) { 1178 ClassSymbol c = (ClassSymbol) sym; 1179 readingClassAttr = true; 1180 try { 1181 ClassType ct1 = (ClassType)c.type; 1182 Assert.check(c == currentOwner); 1183 ct1.typarams_field = readTypeParams(nextChar()); 1184 ct1.supertype_field = sigToType(); 1185 ListBuffer<Type> is = new ListBuffer<>(); 1186 while (sigp != siglimit) is.append(sigToType()); 1187 ct1.interfaces_field = is.toList(); 1188 } finally { 1189 readingClassAttr = false; 1190 } 1191 } else { 1192 List<Type> thrown = sym.type.getThrownTypes(); 1193 sym.type = readType(nextChar()); 1194 //- System.err.println(" # " + sym.type); 1195 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1196 sym.type.asMethodType().thrown = thrown; 1197 1198 } 1199 } 1200 }, 1201 1202 // v49 annotation attributes 1203 1204 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1205 protected void read(Symbol sym, int attrLen) { 1206 attachAnnotationDefault(sym); 1207 } 1208 }, 1209 1210 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1211 protected void read(Symbol sym, int attrLen) { 1212 attachAnnotations(sym); 1213 } 1214 }, 1215 1216 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1217 protected void read(Symbol sym, int attrLen) { 1218 attachParameterAnnotations(sym); 1219 } 1220 }, 1221 1222 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1223 protected void read(Symbol sym, int attrLen) { 1224 attachAnnotations(sym); 1225 } 1226 }, 1227 1228 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1229 protected void read(Symbol sym, int attrLen) { 1230 attachParameterAnnotations(sym); 1231 } 1232 }, 1233 1234 // additional "legacy" v49 attributes, superceded by flags 1235 1236 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1237 protected void read(Symbol sym, int attrLen) { 1238 sym.flags_field |= ANNOTATION; 1239 } 1240 }, 1241 1242 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1243 protected void read(Symbol sym, int attrLen) { 1244 sym.flags_field |= BRIDGE; 1245 } 1246 }, 1247 1248 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1249 protected void read(Symbol sym, int attrLen) { 1250 sym.flags_field |= ENUM; 1251 } 1252 }, 1253 1254 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1255 protected void read(Symbol sym, int attrLen) { 1256 sym.flags_field |= VARARGS; 1257 } 1258 }, 1259 1260 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1261 protected void read(Symbol sym, int attrLen) { 1262 attachTypeAnnotations(sym); 1263 } 1264 }, 1265 1266 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1267 protected void read(Symbol sym, int attrLen) { 1268 attachTypeAnnotations(sym); 1269 } 1270 }, 1271 1272 // The following attributes for a Code attribute are not currently handled 1273 // StackMapTable 1274 // SourceDebugExtension 1275 // LineNumberTable 1276 // LocalVariableTypeTable 1277 1278 // standard v52 attributes 1279 1280 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1281 protected void read(Symbol sym, int attrlen) { 1282 int newbp = bp + attrlen; 1283 if (saveParameterNames) { 1284 sawMethodParameters = true; 1285 int numEntries = nextByte(); 1286 parameterNameIndices = new int[numEntries]; 1287 haveParameterNameIndices = true; 1288 for (int i = 0; i < numEntries; i++) { 1289 int nameIndex = nextChar(); 1290 int flags = nextChar(); 1291 parameterNameIndices[i] = nameIndex; 1292 } 1293 } 1294 bp = newbp; 1295 } 1296 }, 1297 1298 // standard v53 attributes 1299 1300 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) { 1301 @Override 1302 protected boolean accepts(AttributeKind kind) { 1303 return super.accepts(kind) && allowModules; 1304 } 1305 protected void read(Symbol sym, int attrLen) { 1306 if (sym.kind == TYP && sym.owner.kind == MDL) { 1307 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1308 ListBuffer<Directive> directives = new ListBuffer<>(); 1309 1310 Name moduleName = readModuleName(nextChar()); 1311 if (currentModule.name != moduleName) { 1312 throw badClassFile("module.name.mismatch", moduleName, currentModule.name); 1313 } 1314 1315 msym.flags.addAll(readModuleFlags(nextChar())); 1316 msym.version = readName(nextChar()); 1317 1318 ListBuffer<RequiresDirective> requires = new ListBuffer<>(); 1319 int nrequires = nextChar(); 1320 for (int i = 0; i < nrequires; i++) { 1321 ModuleSymbol rsym = syms.enterModule(readModuleName(nextChar())); 1322 Set<RequiresFlag> flags = readRequiresFlags(nextChar()); 1323 nextChar(); // skip compiled version 1324 requires.add(new RequiresDirective(rsym, flags)); 1325 } 1326 msym.requires = requires.toList(); 1327 directives.addAll(msym.requires); 1328 1329 ListBuffer<ExportsDirective> exports = new ListBuffer<>(); 1330 int nexports = nextChar(); 1331 for (int i = 0; i < nexports; i++) { 1332 Name n = readName(nextChar()); 1333 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n))); 1334 Set<ExportsFlag> flags = readExportsFlags(nextChar()); 1335 int nto = nextChar(); 1336 List<ModuleSymbol> to; 1337 if (nto == 0) { 1338 to = null; 1339 } else { 1340 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1341 for (int t = 0; t < nto; t++) 1342 lb.append(syms.enterModule(readModuleName(nextChar()))); 1343 to = lb.toList(); 1344 } 1345 exports.add(new ExportsDirective(p, to, flags)); 1346 } 1347 msym.exports = exports.toList(); 1348 directives.addAll(msym.exports); 1349 ListBuffer<OpensDirective> opens = new ListBuffer<>(); 1350 int nopens = nextChar(); 1351 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) { 1352 throw badClassFile("module.non.zero.opens", currentModule.name); 1353 } 1354 for (int i = 0; i < nopens; i++) { 1355 Name n = readName(nextChar()); 1356 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n))); 1357 Set<OpensFlag> flags = readOpensFlags(nextChar()); 1358 int nto = nextChar(); 1359 List<ModuleSymbol> to; 1360 if (nto == 0) { 1361 to = null; 1362 } else { 1363 ListBuffer<ModuleSymbol> lb = new ListBuffer<>(); 1364 for (int t = 0; t < nto; t++) 1365 lb.append(syms.enterModule(readModuleName(nextChar()))); 1366 to = lb.toList(); 1367 } 1368 opens.add(new OpensDirective(p, to, flags)); 1369 } 1370 msym.opens = opens.toList(); 1371 directives.addAll(msym.opens); 1372 1373 msym.directives = directives.toList(); 1374 1375 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>(); 1376 int nuses = nextChar(); 1377 for (int i = 0; i < nuses; i++) { 1378 Name srvc = readClassName(nextChar()); 1379 uses.add(new InterimUsesDirective(srvc)); 1380 } 1381 interimUses = uses.toList(); 1382 1383 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>(); 1384 int nprovides = nextChar(); 1385 for (int p = 0; p < nprovides; p++) { 1386 Name srvc = readClassName(nextChar()); 1387 int nimpls = nextChar(); 1388 ListBuffer<Name> impls = new ListBuffer<>(); 1389 for (int i = 0; i < nimpls; i++) { 1390 impls.append(readClassName(nextChar())); 1391 provides.add(new InterimProvidesDirective(srvc, impls.toList())); 1392 } 1393 } 1394 interimProvides = provides.toList(); 1395 } 1396 } 1397 }, 1398 1399 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) { 1400 @Override 1401 protected boolean accepts(AttributeKind kind) { 1402 return super.accepts(kind) && allowModules; 1403 } 1404 protected void read(Symbol sym, int attrLen) { 1405 if (sym.kind == TYP && sym.owner.kind == MDL) { 1406 ModuleSymbol msym = (ModuleSymbol) sym.owner; 1407 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar())); 1408 } 1409 } 1410 }, 1411 }; 1412 1413 for (AttributeReader r: readers) 1414 attributeReaders.put(r.name, r); 1415 } 1416 1417 protected void readEnclosingMethodAttr(Symbol sym) { 1418 // sym is a nested class with an "Enclosing Method" attribute 1419 // remove sym from it's current owners scope and place it in 1420 // the scope specified by the attribute 1421 sym.owner.members().remove(sym); 1422 ClassSymbol self = (ClassSymbol)sym; 1423 ClassSymbol c = readClassSymbol(nextChar()); 1424 NameAndType nt = readNameAndType(nextChar()); 1425 1426 if (c.members_field == null) 1427 throw badClassFile("bad.enclosing.class", self, c); 1428 1429 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1430 if (nt != null && m == null) 1431 throw badEnclosingMethod(self); 1432 1433 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1434 self.owner = m != null ? m : c; 1435 if (self.name.isEmpty()) 1436 self.fullname = names.empty; 1437 else 1438 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1439 1440 if (m != null) { 1441 ((ClassType)sym.type).setEnclosingType(m.type); 1442 } else if ((self.flags_field & STATIC) == 0) { 1443 ((ClassType)sym.type).setEnclosingType(c.type); 1444 } else { 1445 ((ClassType)sym.type).setEnclosingType(Type.noType); 1446 } 1447 enterTypevars(self, self.type); 1448 if (!missingTypeVariables.isEmpty()) { 1449 ListBuffer<Type> typeVars = new ListBuffer<>(); 1450 for (Type typevar : missingTypeVariables) { 1451 typeVars.append(findTypeVar(typevar.tsym.name)); 1452 } 1453 foundTypeVariables = typeVars.toList(); 1454 } else { 1455 foundTypeVariables = List.nil(); 1456 } 1457 } 1458 1459 // See java.lang.Class 1460 private Name simpleBinaryName(Name self, Name enclosing) { 1461 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1462 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1463 throw badClassFile("bad.enclosing.method", self); 1464 int index = 1; 1465 while (index < simpleBinaryName.length() && 1466 isAsciiDigit(simpleBinaryName.charAt(index))) 1467 index++; 1468 return names.fromString(simpleBinaryName.substring(index)); 1469 } 1470 1471 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1472 if (nt == null) 1473 return null; 1474 1475 MethodType type = nt.uniqueType.type.asMethodType(); 1476 1477 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1478 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1479 return (MethodSymbol)sym; 1480 } 1481 1482 if (nt.name != names.init) 1483 // not a constructor 1484 return null; 1485 if ((flags & INTERFACE) != 0) 1486 // no enclosing instance 1487 return null; 1488 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1489 // no parameters 1490 return null; 1491 1492 // A constructor of an inner class. 1493 // Remove the first argument (the enclosing instance) 1494 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1495 nt.uniqueType.type.getReturnType(), 1496 nt.uniqueType.type.getThrownTypes(), 1497 syms.methodClass)); 1498 // Try searching again 1499 return findMethod(nt, scope, flags); 1500 } 1501 1502 /** Similar to Types.isSameType but avoids completion */ 1503 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1504 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1505 .prepend(types.erasure(mt1.getReturnType())); 1506 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1507 while (!types1.isEmpty() && !types2.isEmpty()) { 1508 if (types1.head.tsym != types2.head.tsym) 1509 return false; 1510 types1 = types1.tail; 1511 types2 = types2.tail; 1512 } 1513 return types1.isEmpty() && types2.isEmpty(); 1514 } 1515 1516 /** 1517 * Character.isDigit answers <tt>true</tt> to some non-ascii 1518 * digits. This one does not. <b>copied from java.lang.Class</b> 1519 */ 1520 private static boolean isAsciiDigit(char c) { 1521 return '0' <= c && c <= '9'; 1522 } 1523 1524 /** Read member attributes. 1525 */ 1526 void readMemberAttrs(Symbol sym) { 1527 readAttrs(sym, AttributeKind.MEMBER); 1528 } 1529 1530 void readAttrs(Symbol sym, AttributeKind kind) { 1531 char ac = nextChar(); 1532 for (int i = 0; i < ac; i++) { 1533 Name attrName = readName(nextChar()); 1534 int attrLen = nextInt(); 1535 AttributeReader r = attributeReaders.get(attrName); 1536 if (r != null && r.accepts(kind)) 1537 r.read(sym, attrLen); 1538 else { 1539 bp = bp + attrLen; 1540 } 1541 } 1542 } 1543 1544 private boolean readingClassAttr = false; 1545 private List<Type> missingTypeVariables = List.nil(); 1546 private List<Type> foundTypeVariables = List.nil(); 1547 1548 /** Read class attributes. 1549 */ 1550 void readClassAttrs(ClassSymbol c) { 1551 readAttrs(c, AttributeKind.CLASS); 1552 } 1553 1554 /** Read code block. 1555 */ 1556 Code readCode(Symbol owner) { 1557 nextChar(); // max_stack 1558 nextChar(); // max_locals 1559 final int code_length = nextInt(); 1560 bp += code_length; 1561 final char exception_table_length = nextChar(); 1562 bp += exception_table_length * 8; 1563 readMemberAttrs(owner); 1564 return null; 1565 } 1566 1567/************************************************************************ 1568 * Reading Java-language annotations 1569 ***********************************************************************/ 1570 1571 /** Attach annotations. 1572 */ 1573 void attachAnnotations(final Symbol sym) { 1574 int numAttributes = nextChar(); 1575 if (numAttributes != 0) { 1576 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1577 for (int i = 0; i<numAttributes; i++) { 1578 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1579 if (proxy.type.tsym == syms.proprietaryType.tsym) 1580 sym.flags_field |= PROPRIETARY; 1581 else if (proxy.type.tsym == syms.profileType.tsym) { 1582 if (profile != Profile.DEFAULT) { 1583 for (Pair<Name,Attribute> v: proxy.values) { 1584 if (v.fst == names.value && v.snd instanceof Attribute.Constant) { 1585 Attribute.Constant c = (Attribute.Constant) v.snd; 1586 if (c.type == syms.intType && ((Integer) c.value) > profile.value) { 1587 sym.flags_field |= NOT_IN_PROFILE; 1588 } 1589 } 1590 } 1591 } 1592 } else { 1593 if (proxy.type.tsym == syms.annotationTargetType.tsym) { 1594 target = proxy; 1595 } else if (proxy.type.tsym == syms.repeatableType.tsym) { 1596 repeatable = proxy; 1597 } else if (proxy.type.tsym == syms.deprecatedType.tsym) { 1598 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 1599 for (Pair<Name, Attribute> v : proxy.values) { 1600 if (v.fst == names.forRemoval && v.snd instanceof Attribute.Constant) { 1601 Attribute.Constant c = (Attribute.Constant) v.snd; 1602 if (c.type == syms.booleanType && ((Integer) c.value) != 0) { 1603 sym.flags_field |= DEPRECATED_REMOVAL; 1604 } 1605 } 1606 } 1607 } 1608 1609 proxies.append(proxy); 1610 } 1611 } 1612 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1613 } 1614 } 1615 1616 /** Attach parameter annotations. 1617 */ 1618 void attachParameterAnnotations(final Symbol method) { 1619 final MethodSymbol meth = (MethodSymbol)method; 1620 int numParameters = buf[bp++] & 0xFF; 1621 List<VarSymbol> parameters = meth.params(); 1622 int pnum = 0; 1623 while (parameters.tail != null) { 1624 attachAnnotations(parameters.head); 1625 parameters = parameters.tail; 1626 pnum++; 1627 } 1628 if (pnum != numParameters) { 1629 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1630 } 1631 } 1632 1633 void attachTypeAnnotations(final Symbol sym) { 1634 int numAttributes = nextChar(); 1635 if (numAttributes != 0) { 1636 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1637 for (int i = 0; i < numAttributes; i++) 1638 proxies.append(readTypeAnnotation()); 1639 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1640 } 1641 } 1642 1643 /** Attach the default value for an annotation element. 1644 */ 1645 void attachAnnotationDefault(final Symbol sym) { 1646 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1647 final Attribute value = readAttributeValue(); 1648 1649 // The default value is set later during annotation. It might 1650 // be the case that the Symbol sym is annotated _after_ the 1651 // repeating instances that depend on this default value, 1652 // because of this we set an interim value that tells us this 1653 // element (most likely) has a default. 1654 // 1655 // Set interim value for now, reset just before we do this 1656 // properly at annotate time. 1657 meth.defaultValue = value; 1658 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1659 } 1660 1661 Type readTypeOrClassSymbol(int i) { 1662 // support preliminary jsr175-format class files 1663 if (buf[poolIdx[i]] == CONSTANT_Class) 1664 return readClassSymbol(i).type; 1665 return readTypeToProxy(i); 1666 } 1667 Type readEnumType(int i) { 1668 // support preliminary jsr175-format class files 1669 int index = poolIdx[i]; 1670 int length = getChar(index + 1); 1671 if (buf[index + length + 2] != ';') 1672 return enterClass(readName(i)).type; 1673 return readTypeToProxy(i); 1674 } 1675 Type readTypeToProxy(int i) { 1676 if (currentModule.module_info == currentOwner) { 1677 int index = poolIdx[i]; 1678 return new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1))); 1679 } else { 1680 return readType(i); 1681 } 1682 } 1683 1684 CompoundAnnotationProxy readCompoundAnnotation() { 1685 Type t; 1686 if (currentModule.module_info == currentOwner) { 1687 int index = poolIdx[nextChar()]; 1688 t = new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1))); 1689 } else { 1690 t = readTypeOrClassSymbol(nextChar()); 1691 } 1692 int numFields = nextChar(); 1693 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1694 for (int i=0; i<numFields; i++) { 1695 Name name = readName(nextChar()); 1696 Attribute value = readAttributeValue(); 1697 pairs.append(new Pair<>(name, value)); 1698 } 1699 return new CompoundAnnotationProxy(t, pairs.toList()); 1700 } 1701 1702 TypeAnnotationProxy readTypeAnnotation() { 1703 TypeAnnotationPosition position = readPosition(); 1704 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1705 1706 return new TypeAnnotationProxy(proxy, position); 1707 } 1708 1709 TypeAnnotationPosition readPosition() { 1710 int tag = nextByte(); // TargetType tag is a byte 1711 1712 if (!TargetType.isValidTargetTypeValue(tag)) 1713 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1714 1715 TargetType type = TargetType.fromTargetTypeValue(tag); 1716 1717 switch (type) { 1718 // instanceof 1719 case INSTANCEOF: { 1720 final int offset = nextChar(); 1721 final TypeAnnotationPosition position = 1722 TypeAnnotationPosition.instanceOf(readTypePath()); 1723 position.offset = offset; 1724 return position; 1725 } 1726 // new expression 1727 case NEW: { 1728 final int offset = nextChar(); 1729 final TypeAnnotationPosition position = 1730 TypeAnnotationPosition.newObj(readTypePath()); 1731 position.offset = offset; 1732 return position; 1733 } 1734 // constructor/method reference receiver 1735 case CONSTRUCTOR_REFERENCE: { 1736 final int offset = nextChar(); 1737 final TypeAnnotationPosition position = 1738 TypeAnnotationPosition.constructorRef(readTypePath()); 1739 position.offset = offset; 1740 return position; 1741 } 1742 case METHOD_REFERENCE: { 1743 final int offset = nextChar(); 1744 final TypeAnnotationPosition position = 1745 TypeAnnotationPosition.methodRef(readTypePath()); 1746 position.offset = offset; 1747 return position; 1748 } 1749 // local variable 1750 case LOCAL_VARIABLE: { 1751 final int table_length = nextChar(); 1752 final int[] newLvarOffset = new int[table_length]; 1753 final int[] newLvarLength = new int[table_length]; 1754 final int[] newLvarIndex = new int[table_length]; 1755 1756 for (int i = 0; i < table_length; ++i) { 1757 newLvarOffset[i] = nextChar(); 1758 newLvarLength[i] = nextChar(); 1759 newLvarIndex[i] = nextChar(); 1760 } 1761 1762 final TypeAnnotationPosition position = 1763 TypeAnnotationPosition.localVariable(readTypePath()); 1764 position.lvarOffset = newLvarOffset; 1765 position.lvarLength = newLvarLength; 1766 position.lvarIndex = newLvarIndex; 1767 return position; 1768 } 1769 // resource variable 1770 case RESOURCE_VARIABLE: { 1771 final int table_length = nextChar(); 1772 final int[] newLvarOffset = new int[table_length]; 1773 final int[] newLvarLength = new int[table_length]; 1774 final int[] newLvarIndex = new int[table_length]; 1775 1776 for (int i = 0; i < table_length; ++i) { 1777 newLvarOffset[i] = nextChar(); 1778 newLvarLength[i] = nextChar(); 1779 newLvarIndex[i] = nextChar(); 1780 } 1781 1782 final TypeAnnotationPosition position = 1783 TypeAnnotationPosition.resourceVariable(readTypePath()); 1784 position.lvarOffset = newLvarOffset; 1785 position.lvarLength = newLvarLength; 1786 position.lvarIndex = newLvarIndex; 1787 return position; 1788 } 1789 // exception parameter 1790 case EXCEPTION_PARAMETER: { 1791 final int exception_index = nextChar(); 1792 final TypeAnnotationPosition position = 1793 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1794 position.setExceptionIndex(exception_index); 1795 return position; 1796 } 1797 // method receiver 1798 case METHOD_RECEIVER: 1799 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1800 // type parameter 1801 case CLASS_TYPE_PARAMETER: { 1802 final int parameter_index = nextByte(); 1803 return TypeAnnotationPosition 1804 .typeParameter(readTypePath(), parameter_index); 1805 } 1806 case METHOD_TYPE_PARAMETER: { 1807 final int parameter_index = nextByte(); 1808 return TypeAnnotationPosition 1809 .methodTypeParameter(readTypePath(), parameter_index); 1810 } 1811 // type parameter bound 1812 case CLASS_TYPE_PARAMETER_BOUND: { 1813 final int parameter_index = nextByte(); 1814 final int bound_index = nextByte(); 1815 return TypeAnnotationPosition 1816 .typeParameterBound(readTypePath(), parameter_index, 1817 bound_index); 1818 } 1819 case METHOD_TYPE_PARAMETER_BOUND: { 1820 final int parameter_index = nextByte(); 1821 final int bound_index = nextByte(); 1822 return TypeAnnotationPosition 1823 .methodTypeParameterBound(readTypePath(), parameter_index, 1824 bound_index); 1825 } 1826 // class extends or implements clause 1827 case CLASS_EXTENDS: { 1828 final int type_index = nextChar(); 1829 return TypeAnnotationPosition.classExtends(readTypePath(), 1830 type_index); 1831 } 1832 // throws 1833 case THROWS: { 1834 final int type_index = nextChar(); 1835 return TypeAnnotationPosition.methodThrows(readTypePath(), 1836 type_index); 1837 } 1838 // method parameter 1839 case METHOD_FORMAL_PARAMETER: { 1840 final int parameter_index = nextByte(); 1841 return TypeAnnotationPosition.methodParameter(readTypePath(), 1842 parameter_index); 1843 } 1844 // type cast 1845 case CAST: { 1846 final int offset = nextChar(); 1847 final int type_index = nextByte(); 1848 final TypeAnnotationPosition position = 1849 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1850 position.offset = offset; 1851 return position; 1852 } 1853 // method/constructor/reference type argument 1854 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1855 final int offset = nextChar(); 1856 final int type_index = nextByte(); 1857 final TypeAnnotationPosition position = TypeAnnotationPosition 1858 .constructorInvocationTypeArg(readTypePath(), type_index); 1859 position.offset = offset; 1860 return position; 1861 } 1862 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1863 final int offset = nextChar(); 1864 final int type_index = nextByte(); 1865 final TypeAnnotationPosition position = TypeAnnotationPosition 1866 .methodInvocationTypeArg(readTypePath(), type_index); 1867 position.offset = offset; 1868 return position; 1869 } 1870 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1871 final int offset = nextChar(); 1872 final int type_index = nextByte(); 1873 final TypeAnnotationPosition position = TypeAnnotationPosition 1874 .constructorRefTypeArg(readTypePath(), type_index); 1875 position.offset = offset; 1876 return position; 1877 } 1878 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1879 final int offset = nextChar(); 1880 final int type_index = nextByte(); 1881 final TypeAnnotationPosition position = TypeAnnotationPosition 1882 .methodRefTypeArg(readTypePath(), type_index); 1883 position.offset = offset; 1884 return position; 1885 } 1886 // We don't need to worry about these 1887 case METHOD_RETURN: 1888 return TypeAnnotationPosition.methodReturn(readTypePath()); 1889 case FIELD: 1890 return TypeAnnotationPosition.field(readTypePath()); 1891 case UNKNOWN: 1892 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1893 default: 1894 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1895 } 1896 } 1897 1898 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1899 int len = nextByte(); 1900 ListBuffer<Integer> loc = new ListBuffer<>(); 1901 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1902 loc = loc.append(nextByte()); 1903 1904 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1905 1906 } 1907 1908 Attribute readAttributeValue() { 1909 char c = (char) buf[bp++]; 1910 switch (c) { 1911 case 'B': 1912 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1913 case 'C': 1914 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1915 case 'D': 1916 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1917 case 'F': 1918 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1919 case 'I': 1920 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1921 case 'J': 1922 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1923 case 'S': 1924 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1925 case 'Z': 1926 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1927 case 's': 1928 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1929 case 'e': 1930 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1931 case 'c': 1932 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar())); 1933 case '[': { 1934 int n = nextChar(); 1935 ListBuffer<Attribute> l = new ListBuffer<>(); 1936 for (int i=0; i<n; i++) 1937 l.append(readAttributeValue()); 1938 return new ArrayAttributeProxy(l.toList()); 1939 } 1940 case '@': 1941 return readCompoundAnnotation(); 1942 default: 1943 throw new AssertionError("unknown annotation tag '" + c + "'"); 1944 } 1945 } 1946 1947 interface ProxyVisitor extends Attribute.Visitor { 1948 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1949 void visitClassAttributeProxy(ClassAttributeProxy proxy); 1950 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1951 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1952 } 1953 1954 static class EnumAttributeProxy extends Attribute { 1955 Type enumType; 1956 Name enumerator; 1957 public EnumAttributeProxy(Type enumType, Name enumerator) { 1958 super(null); 1959 this.enumType = enumType; 1960 this.enumerator = enumerator; 1961 } 1962 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1963 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1964 public String toString() { 1965 return "/*proxy enum*/" + enumType + "." + enumerator; 1966 } 1967 } 1968 1969 static class ClassAttributeProxy extends Attribute { 1970 Type classType; 1971 public ClassAttributeProxy(Type classType) { 1972 super(null); 1973 this.classType = classType; 1974 } 1975 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); } 1976 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1977 public String toString() { 1978 return "/*proxy class*/" + classType + ".class"; 1979 } 1980 } 1981 1982 static class ArrayAttributeProxy extends Attribute { 1983 List<Attribute> values; 1984 ArrayAttributeProxy(List<Attribute> values) { 1985 super(null); 1986 this.values = values; 1987 } 1988 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1989 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1990 public String toString() { 1991 return "{" + values + "}"; 1992 } 1993 } 1994 1995 /** A temporary proxy representing a compound attribute. 1996 */ 1997 static class CompoundAnnotationProxy extends Attribute { 1998 final List<Pair<Name,Attribute>> values; 1999 public CompoundAnnotationProxy(Type type, 2000 List<Pair<Name,Attribute>> values) { 2001 super(type); 2002 this.values = values; 2003 } 2004 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 2005 @Override @DefinedBy(Api.LANGUAGE_MODEL) 2006 public String toString() { 2007 StringBuilder buf = new StringBuilder(); 2008 buf.append("@"); 2009 buf.append(type.tsym.getQualifiedName()); 2010 buf.append("/*proxy*/{"); 2011 boolean first = true; 2012 for (List<Pair<Name,Attribute>> v = values; 2013 v.nonEmpty(); v = v.tail) { 2014 Pair<Name,Attribute> value = v.head; 2015 if (!first) buf.append(","); 2016 first = false; 2017 buf.append(value.fst); 2018 buf.append("="); 2019 buf.append(value.snd); 2020 } 2021 buf.append("}"); 2022 return buf.toString(); 2023 } 2024 } 2025 2026 /** A temporary proxy representing a type annotation. 2027 */ 2028 static class TypeAnnotationProxy { 2029 final CompoundAnnotationProxy compound; 2030 final TypeAnnotationPosition position; 2031 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 2032 TypeAnnotationPosition position) { 2033 this.compound = compound; 2034 this.position = position; 2035 } 2036 } 2037 2038 class AnnotationDeproxy implements ProxyVisitor { 2039 private ClassSymbol requestingOwner; 2040 2041 AnnotationDeproxy(ClassSymbol owner) { 2042 this.requestingOwner = owner; 2043 } 2044 2045 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 2046 // also must fill in types!!!! 2047 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 2048 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 2049 buf.append(deproxyCompound(l.head)); 2050 } 2051 return buf.toList(); 2052 } 2053 2054 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 2055 Type annotationType = resolvePossibleProxyType(a.type); 2056 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 2057 for (List<Pair<Name,Attribute>> l = a.values; 2058 l.nonEmpty(); 2059 l = l.tail) { 2060 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst); 2061 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 2062 } 2063 return new Attribute.Compound(annotationType, buf.toList()); 2064 } 2065 2066 MethodSymbol findAccessMethod(Type container, Name name) { 2067 CompletionFailure failure = null; 2068 try { 2069 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 2070 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 2071 return (MethodSymbol) sym; 2072 } 2073 } catch (CompletionFailure ex) { 2074 failure = ex; 2075 } 2076 // The method wasn't found: emit a warning and recover 2077 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 2078 try { 2079 if (lintClassfile) { 2080 if (failure == null) { 2081 log.warning("annotation.method.not.found", 2082 container, 2083 name); 2084 } else { 2085 log.warning("annotation.method.not.found.reason", 2086 container, 2087 name, 2088 failure.getDetailValue());//diagnostic, if present 2089 } 2090 } 2091 } finally { 2092 log.useSource(prevSource); 2093 } 2094 // Construct a new method type and symbol. Use bottom 2095 // type (typeof null) as return type because this type is 2096 // a subtype of all reference types and can be converted 2097 // to primitive types by unboxing. 2098 MethodType mt = new MethodType(List.nil(), 2099 syms.botType, 2100 List.nil(), 2101 syms.methodClass); 2102 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 2103 } 2104 2105 Attribute result; 2106 Type type; 2107 Attribute deproxy(Type t, Attribute a) { 2108 Type oldType = type; 2109 try { 2110 type = t; 2111 a.accept(this); 2112 return result; 2113 } finally { 2114 type = oldType; 2115 } 2116 } 2117 2118 // implement Attribute.Visitor below 2119 2120 public void visitConstant(Attribute.Constant value) { 2121 // assert value.type == type; 2122 result = value; 2123 } 2124 2125 public void visitClass(Attribute.Class clazz) { 2126 result = clazz; 2127 } 2128 2129 public void visitEnum(Attribute.Enum e) { 2130 throw new AssertionError(); // shouldn't happen 2131 } 2132 2133 public void visitCompound(Attribute.Compound compound) { 2134 throw new AssertionError(); // shouldn't happen 2135 } 2136 2137 public void visitArray(Attribute.Array array) { 2138 throw new AssertionError(); // shouldn't happen 2139 } 2140 2141 public void visitError(Attribute.Error e) { 2142 throw new AssertionError(); // shouldn't happen 2143 } 2144 2145 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 2146 // type.tsym.flatName() should == proxy.enumFlatName 2147 Type enumType = resolvePossibleProxyType(proxy.enumType); 2148 TypeSymbol enumTypeSym = enumType.tsym; 2149 VarSymbol enumerator = null; 2150 CompletionFailure failure = null; 2151 try { 2152 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 2153 if (sym.kind == VAR) { 2154 enumerator = (VarSymbol)sym; 2155 break; 2156 } 2157 } 2158 } 2159 catch (CompletionFailure ex) { 2160 failure = ex; 2161 } 2162 if (enumerator == null) { 2163 if (failure != null) { 2164 log.warning("unknown.enum.constant.reason", 2165 currentClassFile, enumTypeSym, proxy.enumerator, 2166 failure.getDiagnostic()); 2167 } else { 2168 log.warning("unknown.enum.constant", 2169 currentClassFile, enumTypeSym, proxy.enumerator); 2170 } 2171 result = new Attribute.Enum(enumTypeSym.type, 2172 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 2173 } else { 2174 result = new Attribute.Enum(enumTypeSym.type, enumerator); 2175 } 2176 } 2177 2178 @Override 2179 public void visitClassAttributeProxy(ClassAttributeProxy proxy) { 2180 Type classType = resolvePossibleProxyType(proxy.classType); 2181 result = new Attribute.Class(types, classType); 2182 } 2183 2184 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 2185 int length = proxy.values.length(); 2186 Attribute[] ats = new Attribute[length]; 2187 Type elemtype = types.elemtype(type); 2188 int i = 0; 2189 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 2190 ats[i++] = deproxy(elemtype, p.head); 2191 } 2192 result = new Attribute.Array(type, ats); 2193 } 2194 2195 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 2196 result = deproxyCompound(proxy); 2197 } 2198 2199 Type resolvePossibleProxyType(Type t) { 2200 if (t instanceof ProxyType) { 2201 Assert.check(requestingOwner.owner.kind == MDL); 2202 ModuleSymbol prevCurrentModule = currentModule; 2203 currentModule = (ModuleSymbol) requestingOwner.owner; 2204 try { 2205 return ((ProxyType) t).resolve(); 2206 } finally { 2207 currentModule = prevCurrentModule; 2208 } 2209 } else { 2210 return t; 2211 } 2212 } 2213 } 2214 2215 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable { 2216 final MethodSymbol sym; 2217 final Attribute value; 2218 final JavaFileObject classFile = currentClassFile; 2219 2220 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 2221 super(currentOwner.kind == MTH 2222 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2223 this.sym = sym; 2224 this.value = value; 2225 } 2226 2227 @Override 2228 public void run() { 2229 JavaFileObject previousClassFile = currentClassFile; 2230 try { 2231 // Reset the interim value set earlier in 2232 // attachAnnotationDefault(). 2233 sym.defaultValue = null; 2234 currentClassFile = classFile; 2235 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 2236 } finally { 2237 currentClassFile = previousClassFile; 2238 } 2239 } 2240 2241 @Override 2242 public String toString() { 2243 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 2244 } 2245 } 2246 2247 class AnnotationCompleter extends AnnotationDeproxy implements Runnable { 2248 final Symbol sym; 2249 final List<CompoundAnnotationProxy> l; 2250 final JavaFileObject classFile; 2251 2252 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 2253 super(currentOwner.kind == MTH 2254 ? currentOwner.enclClass() : (ClassSymbol)currentOwner); 2255 if (sym.kind == TYP && sym.owner.kind == MDL) { 2256 this.sym = sym.owner; 2257 } else { 2258 this.sym = sym; 2259 } 2260 this.l = l; 2261 this.classFile = currentClassFile; 2262 } 2263 2264 @Override 2265 public void run() { 2266 JavaFileObject previousClassFile = currentClassFile; 2267 try { 2268 currentClassFile = classFile; 2269 List<Attribute.Compound> newList = deproxyCompoundList(l); 2270 for (Attribute.Compound attr : newList) { 2271 if (attr.type.tsym == syms.deprecatedType.tsym) { 2272 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION); 2273 Attribute forRemoval = attr.member(names.forRemoval); 2274 if (forRemoval instanceof Attribute.Constant) { 2275 Attribute.Constant c = (Attribute.Constant) forRemoval; 2276 if (c.type == syms.booleanType && ((Integer) c.value) != 0) { 2277 sym.flags_field |= DEPRECATED_REMOVAL; 2278 } 2279 } 2280 } 2281 } 2282 if (sym.annotationsPendingCompletion()) { 2283 sym.setDeclarationAttributes(newList); 2284 } else { 2285 sym.appendAttributes(newList); 2286 } 2287 } finally { 2288 currentClassFile = previousClassFile; 2289 } 2290 } 2291 2292 @Override 2293 public String toString() { 2294 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 2295 } 2296 } 2297 2298 class TypeAnnotationCompleter extends AnnotationCompleter { 2299 2300 List<TypeAnnotationProxy> proxies; 2301 2302 TypeAnnotationCompleter(Symbol sym, 2303 List<TypeAnnotationProxy> proxies) { 2304 super(sym, List.nil()); 2305 this.proxies = proxies; 2306 } 2307 2308 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 2309 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 2310 for (TypeAnnotationProxy proxy: proxies) { 2311 Attribute.Compound compound = deproxyCompound(proxy.compound); 2312 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 2313 buf.add(typeCompound); 2314 } 2315 return buf.toList(); 2316 } 2317 2318 @Override 2319 public void run() { 2320 JavaFileObject previousClassFile = currentClassFile; 2321 try { 2322 currentClassFile = classFile; 2323 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 2324 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 2325 } finally { 2326 currentClassFile = previousClassFile; 2327 } 2328 } 2329 } 2330 2331 2332/************************************************************************ 2333 * Reading Symbols 2334 ***********************************************************************/ 2335 2336 /** Read a field. 2337 */ 2338 VarSymbol readField() { 2339 long flags = adjustFieldFlags(nextChar()); 2340 Name name = readName(nextChar()); 2341 Type type = readType(nextChar()); 2342 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2343 readMemberAttrs(v); 2344 return v; 2345 } 2346 2347 /** Read a method. 2348 */ 2349 MethodSymbol readMethod() { 2350 long flags = adjustMethodFlags(nextChar()); 2351 Name name = readName(nextChar()); 2352 Type type = readType(nextChar()); 2353 if (currentOwner.isInterface() && 2354 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2355 if (majorVersion > Version.V52.major || 2356 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 2357 if ((flags & (STATIC | PRIVATE)) == 0) { 2358 currentOwner.flags_field |= DEFAULT; 2359 flags |= DEFAULT | ABSTRACT; 2360 } 2361 } else { 2362 //protect against ill-formed classfiles 2363 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2364 Integer.toString(majorVersion), 2365 Integer.toString(minorVersion)); 2366 } 2367 } 2368 if (name == names.init && currentOwner.hasOuterInstance()) { 2369 // Sometimes anonymous classes don't have an outer 2370 // instance, however, there is no reliable way to tell so 2371 // we never strip this$n 2372 // ditto for local classes. Local classes that have an enclosing method set 2373 // won't pass the "hasOuterInstance" check above, but those that don't have an 2374 // enclosing method (i.e. from initializers) will pass that check. 2375 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE); 2376 if (!currentOwner.name.isEmpty() && !local) 2377 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2378 type.getReturnType(), 2379 type.getThrownTypes(), 2380 syms.methodClass); 2381 } 2382 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2383 if (types.isSignaturePolymorphic(m)) { 2384 m.flags_field |= SIGNATURE_POLYMORPHIC; 2385 } 2386 if (saveParameterNames) 2387 initParameterNames(m); 2388 Symbol prevOwner = currentOwner; 2389 currentOwner = m; 2390 try { 2391 readMemberAttrs(m); 2392 } finally { 2393 currentOwner = prevOwner; 2394 } 2395 if (saveParameterNames) 2396 setParameterNames(m, type); 2397 2398 if ((flags & VARARGS) != 0) { 2399 final Type last = type.getParameterTypes().last(); 2400 if (last == null || !last.hasTag(ARRAY)) { 2401 m.flags_field &= ~VARARGS; 2402 throw badClassFile("malformed.vararg.method", m); 2403 } 2404 } 2405 2406 return m; 2407 } 2408 2409 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2410 boolean isVarargs = (flags & VARARGS) != 0; 2411 if (isVarargs) { 2412 Type varargsElem = args.last(); 2413 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2414 for (Type t : args) { 2415 adjustedArgs.append(t != varargsElem ? 2416 t : 2417 ((ArrayType)t).makeVarargs()); 2418 } 2419 args = adjustedArgs.toList(); 2420 } 2421 return args.tail; 2422 } 2423 2424 /** 2425 * Init the parameter names array. 2426 * Parameter names are currently inferred from the names in the 2427 * LocalVariableTable attributes of a Code attribute. 2428 * (Note: this means parameter names are currently not available for 2429 * methods without a Code attribute.) 2430 * This method initializes an array in which to store the name indexes 2431 * of parameter names found in LocalVariableTable attributes. It is 2432 * slightly supersized to allow for additional slots with a start_pc of 0. 2433 */ 2434 void initParameterNames(MethodSymbol sym) { 2435 // make allowance for synthetic parameters. 2436 final int excessSlots = 4; 2437 int expectedParameterSlots = 2438 Code.width(sym.type.getParameterTypes()) + excessSlots; 2439 if (parameterNameIndices == null 2440 || parameterNameIndices.length < expectedParameterSlots) { 2441 parameterNameIndices = new int[expectedParameterSlots]; 2442 } else 2443 Arrays.fill(parameterNameIndices, 0); 2444 haveParameterNameIndices = false; 2445 sawMethodParameters = false; 2446 } 2447 2448 /** 2449 * Set the parameter names for a symbol from the name index in the 2450 * parameterNameIndicies array. The type of the symbol may have changed 2451 * while reading the method attributes (see the Signature attribute). 2452 * This may be because of generic information or because anonymous 2453 * synthetic parameters were added. The original type (as read from 2454 * the method descriptor) is used to help guess the existence of 2455 * anonymous synthetic parameters. 2456 * On completion, sym.savedParameter names will either be null (if 2457 * no parameter names were found in the class file) or will be set to a 2458 * list of names, one per entry in sym.type.getParameterTypes, with 2459 * any missing names represented by the empty name. 2460 */ 2461 void setParameterNames(MethodSymbol sym, Type jvmType) { 2462 // if no names were found in the class file, there's nothing more to do 2463 if (!haveParameterNameIndices) 2464 return; 2465 // If we get parameter names from MethodParameters, then we 2466 // don't need to skip. 2467 int firstParam = 0; 2468 if (!sawMethodParameters) { 2469 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2470 // the code in readMethod may have skipped the first 2471 // parameter when setting up the MethodType. If so, we 2472 // make a corresponding allowance here for the position of 2473 // the first parameter. Note that this assumes the 2474 // skipped parameter has a width of 1 -- i.e. it is not 2475 // a double width type (long or double.) 2476 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2477 // Sometimes anonymous classes don't have an outer 2478 // instance, however, there is no reliable way to tell so 2479 // we never strip this$n 2480 if (!currentOwner.name.isEmpty()) 2481 firstParam += 1; 2482 } 2483 2484 if (sym.type != jvmType) { 2485 // reading the method attributes has caused the 2486 // symbol's type to be changed. (i.e. the Signature 2487 // attribute.) This may happen if there are hidden 2488 // (synthetic) parameters in the descriptor, but not 2489 // in the Signature. The position of these hidden 2490 // parameters is unspecified; for now, assume they are 2491 // at the beginning, and so skip over them. The 2492 // primary case for this is two hidden parameters 2493 // passed into Enum constructors. 2494 int skip = Code.width(jvmType.getParameterTypes()) 2495 - Code.width(sym.type.getParameterTypes()); 2496 firstParam += skip; 2497 } 2498 } 2499 List<Name> paramNames = List.nil(); 2500 int index = firstParam; 2501 for (Type t: sym.type.getParameterTypes()) { 2502 int nameIdx = (index < parameterNameIndices.length 2503 ? parameterNameIndices[index] : 0); 2504 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2505 paramNames = paramNames.prepend(name); 2506 index += sawMethodParameters ? 1 : Code.width(t); 2507 } 2508 sym.savedParameterNames = paramNames.reverse(); 2509 } 2510 2511 /** 2512 * skip n bytes 2513 */ 2514 void skipBytes(int n) { 2515 bp = bp + n; 2516 } 2517 2518 /** Skip a field or method 2519 */ 2520 void skipMember() { 2521 bp = bp + 6; 2522 char ac = nextChar(); 2523 for (int i = 0; i < ac; i++) { 2524 bp = bp + 2; 2525 int attrLen = nextInt(); 2526 bp = bp + attrLen; 2527 } 2528 } 2529 2530 void skipInnerClasses() { 2531 int n = nextChar(); 2532 for (int i = 0; i < n; i++) { 2533 nextChar(); 2534 nextChar(); 2535 nextChar(); 2536 nextChar(); 2537 } 2538 } 2539 2540 /** Enter type variables of this classtype and all enclosing ones in 2541 * `typevars'. 2542 */ 2543 protected void enterTypevars(Symbol sym, Type t) { 2544 if (t.getEnclosingType() != null) { 2545 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) { 2546 enterTypevars(sym.owner, t.getEnclosingType()); 2547 } 2548 } else if (sym.kind == MTH && !sym.isStatic()) { 2549 enterTypevars(sym.owner, sym.owner.type); 2550 } 2551 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) { 2552 typevars.enter(xs.head.tsym); 2553 } 2554 } 2555 2556 protected ClassSymbol enterClass(Name name) { 2557 return syms.enterClass(currentModule, name); 2558 } 2559 2560 protected ClassSymbol enterClass(Name name, TypeSymbol owner) { 2561 return syms.enterClass(currentModule, name, owner); 2562 } 2563 2564 /** Read contents of a given class symbol `c'. Both external and internal 2565 * versions of an inner class are read. 2566 */ 2567 void readClass(ClassSymbol c) { 2568 ClassType ct = (ClassType)c.type; 2569 2570 // allocate scope for members 2571 c.members_field = WriteableScope.create(c); 2572 2573 // prepare type variable table 2574 typevars = typevars.dup(currentOwner); 2575 if (ct.getEnclosingType().hasTag(CLASS)) 2576 enterTypevars(c.owner, ct.getEnclosingType()); 2577 2578 // read flags, or skip if this is an inner class 2579 long f = nextChar(); 2580 long flags = adjustClassFlags(f); 2581 if ((flags & MODULE) == 0) { 2582 if (c.owner.kind == PCK) c.flags_field = flags; 2583 // read own class name and check that it matches 2584 currentModule = c.packge().modle; 2585 ClassSymbol self = readClassSymbol(nextChar()); 2586 if (c != self) { 2587 throw badClassFile("class.file.wrong.class", 2588 self.flatname); 2589 } 2590 } else { 2591 if (majorVersion < Version.V53.major) { 2592 throw badClassFile("anachronistic.module.info", 2593 Integer.toString(majorVersion), 2594 Integer.toString(minorVersion)); 2595 } 2596 c.flags_field = flags; 2597 currentModule = (ModuleSymbol) c.owner; 2598 int this_class = nextChar(); 2599 // temp, no check on this_class 2600 } 2601 2602 // class attributes must be read before class 2603 // skip ahead to read class attributes 2604 int startbp = bp; 2605 nextChar(); 2606 char interfaceCount = nextChar(); 2607 bp += interfaceCount * 2; 2608 char fieldCount = nextChar(); 2609 for (int i = 0; i < fieldCount; i++) skipMember(); 2610 char methodCount = nextChar(); 2611 for (int i = 0; i < methodCount; i++) skipMember(); 2612 readClassAttrs(c); 2613 2614 if (readAllOfClassFile) { 2615 for (int i = 1; i < poolObj.length; i++) readPool(i); 2616 c.pool = new Pool(poolObj.length, poolObj, types); 2617 } 2618 2619 // reset and read rest of classinfo 2620 bp = startbp; 2621 int n = nextChar(); 2622 if ((flags & MODULE) != 0 && n > 0) { 2623 throw badClassFile("module.info.invalid.super.class"); 2624 } 2625 if (ct.supertype_field == null) 2626 ct.supertype_field = (n == 0) 2627 ? Type.noType 2628 : readClassSymbol(n).erasure(types); 2629 n = nextChar(); 2630 List<Type> is = List.nil(); 2631 for (int i = 0; i < n; i++) { 2632 Type _inter = readClassSymbol(nextChar()).erasure(types); 2633 is = is.prepend(_inter); 2634 } 2635 if (ct.interfaces_field == null) 2636 ct.interfaces_field = is.reverse(); 2637 2638 Assert.check(fieldCount == nextChar()); 2639 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2640 Assert.check(methodCount == nextChar()); 2641 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2642 2643 typevars = typevars.leave(); 2644 } 2645 2646 /** Read inner class info. For each inner/outer pair allocate a 2647 * member class. 2648 */ 2649 void readInnerClasses(ClassSymbol c) { 2650 int n = nextChar(); 2651 for (int i = 0; i < n; i++) { 2652 nextChar(); // skip inner class symbol 2653 ClassSymbol outer = readClassSymbol(nextChar()); 2654 Name name = readName(nextChar()); 2655 if (name == null) name = names.empty; 2656 long flags = adjustClassFlags(nextChar()); 2657 if (outer != null) { // we have a member class 2658 if (name == names.empty) 2659 name = names.one; 2660 ClassSymbol member = enterClass(name, outer); 2661 if ((flags & STATIC) == 0) { 2662 ((ClassType)member.type).setEnclosingType(outer.type); 2663 if (member.erasure_field != null) 2664 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2665 } 2666 if (c == outer) { 2667 member.flags_field = flags; 2668 enterMember(c, member); 2669 } 2670 } 2671 } 2672 } 2673 2674 /** Read a class definition from the bytes in buf. 2675 */ 2676 private void readClassBuffer(ClassSymbol c) throws IOException { 2677 int magic = nextInt(); 2678 if (magic != JAVA_MAGIC) 2679 throw badClassFile("illegal.start.of.class.file"); 2680 2681 minorVersion = nextChar(); 2682 majorVersion = nextChar(); 2683 int maxMajor = 53; // Version.MAX().major; //******* TEMPORARY ******* 2684 int maxMinor = Version.MAX().minor; 2685 if (majorVersion > maxMajor || 2686 majorVersion * 1000 + minorVersion < 2687 Version.MIN().major * 1000 + Version.MIN().minor) { 2688 if (majorVersion == (maxMajor + 1)) 2689 log.warning("big.major.version", 2690 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, 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