1 /* 2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.jvm; 27 28 import java.io.*; 29 import java.net.URI; 30 import java.net.URISyntaxException; 31 import java.nio.CharBuffer; 32 import java.util.Arrays; 33 import java.util.EnumSet; 34 import java.util.HashMap; 35 import java.util.HashSet; 36 import java.util.Map; 37 import java.util.Set; 38 import javax.lang.model.SourceVersion; 39 import javax.tools.JavaFileObject; 40 import javax.tools.JavaFileManager; 41 import javax.tools.JavaFileManager.Location; 42 import javax.tools.StandardJavaFileManager; 43 44 import static javax.tools.StandardLocation.*; 45 46 import com.sun.tools.javac.comp.Annotate; 47 import com.sun.tools.javac.code.*; 48 import com.sun.tools.javac.code.Lint.LintCategory; 49 import com.sun.tools.javac.code.Type.*; 50 import com.sun.tools.javac.code.Symbol.*; 51 import com.sun.tools.javac.code.Symtab; 52 import com.sun.tools.javac.file.BaseFileObject; 53 import com.sun.tools.javac.util.*; 54 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 55 56 import static com.sun.tools.javac.code.Flags.*; 57 import static com.sun.tools.javac.code.Kinds.*; 58 import static com.sun.tools.javac.code.TypeTag.CLASS; 59 import static com.sun.tools.javac.code.TypeTag.TYPEVAR; 60 import static com.sun.tools.javac.jvm.ClassFile.*; 61 import static com.sun.tools.javac.jvm.ClassFile.Version.*; 62 63 import static com.sun.tools.javac.main.Option.*; 64 65 /** This class provides operations to read a classfile into an internal 66 * representation. The internal representation is anchored in a 67 * ClassSymbol which contains in its scope symbol representations 68 * for all other definitions in the classfile. Top-level Classes themselves 69 * appear as members of the scopes of PackageSymbols. 70 * 71 * <p><b>This is NOT part of any supported API. 72 * If you write code that depends on this, you do so at your own risk. 73 * This code and its internal interfaces are subject to change or 74 * deletion without notice.</b> 75 */ 76 public class ClassReader { 77 /** The context key for the class reader. */ 78 protected static final Context.Key<ClassReader> classReaderKey = 79 new Context.Key<ClassReader>(); 80 81 public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 82 83 Annotate annotate; 84 85 /** Switch: verbose output. 86 */ 87 boolean verbose; 88 89 /** Switch: check class file for correct minor version, unrecognized 90 * attributes. 91 */ 92 boolean checkClassFile; 93 94 /** Switch: read constant pool and code sections. This switch is initially 95 * set to false but can be turned on from outside. 96 */ 97 public boolean readAllOfClassFile = false; 98 99 /** Switch: read GJ signature information. 100 */ 101 boolean allowGenerics; 102 103 /** Switch: read varargs attribute. 104 */ 105 boolean allowVarargs; 106 107 /** Switch: allow annotations. 108 */ 109 boolean allowAnnotations; 110 111 /** Switch: allow simplified varargs. 112 */ 113 boolean allowSimplifiedVarargs; 114 115 /** Lint option: warn about classfile issues 116 */ 117 boolean lintClassfile; 118 119 /** Switch: preserve parameter names from the variable table. 120 */ 121 public boolean saveParameterNames; 122 123 /** 124 * Switch: cache completion failures unless -XDdev is used 125 */ 126 private boolean cacheCompletionFailure; 127 128 /** 129 * Switch: prefer source files instead of newer when both source 130 * and class are available 131 **/ 132 public boolean preferSource; 133 134 /** 135 * The currently selected profile. 136 */ 137 public final Profile profile; 138 139 /** The log to use for verbose output 140 */ 141 final Log log; 142 143 /** The symbol table. */ 144 Symtab syms; 145 146 Types types; 147 148 /** The name table. */ 149 final Names names; 150 151 /** Force a completion failure on this name 152 */ 153 final Name completionFailureName; 154 155 /** Access to files 156 */ 157 private final JavaFileManager fileManager; 158 159 /** Factory for diagnostics 160 */ 161 JCDiagnostic.Factory diagFactory; 162 163 /** Can be reassigned from outside: 164 * the completer to be used for ".java" files. If this remains unassigned 165 * ".java" files will not be loaded. 166 */ 167 public SourceCompleter sourceCompleter = null; 168 169 /** A hashtable containing the encountered top-level and member classes, 170 * indexed by flat names. The table does not contain local classes. 171 */ 172 private Map<Name,ClassSymbol> classes; 173 174 /** A hashtable containing the encountered packages. 175 */ 176 private Map<Name, PackageSymbol> packages; 177 178 /** The current scope where type variables are entered. 179 */ 180 protected Scope typevars; 181 182 /** The path name of the class file currently being read. 183 */ 184 protected JavaFileObject currentClassFile = null; 185 186 /** The class or method currently being read. 187 */ 188 protected Symbol currentOwner = null; 189 190 /** The buffer containing the currently read class file. 191 */ 192 byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 193 194 /** The current input pointer. 195 */ 196 protected int bp; 197 198 /** The objects of the constant pool. 199 */ 200 Object[] poolObj; 201 202 /** For every constant pool entry, an index into buf where the 203 * defining section of the entry is found. 204 */ 205 int[] poolIdx; 206 207 /** The major version number of the class file being read. */ 208 int majorVersion; 209 /** The minor version number of the class file being read. */ 210 int minorVersion; 211 212 /** A table to hold the constant pool indices for method parameter 213 * names, as given in LocalVariableTable attributes. 214 */ 215 int[] parameterNameIndices; 216 217 /** 218 * Whether or not any parameter names have been found. 219 */ 220 boolean haveParameterNameIndices; 221 222 /** Set this to false every time we start reading a method 223 * and are saving parameter names. Set it to true when we see 224 * MethodParameters, if it's set when we see a LocalVariableTable, 225 * then we ignore the parameter names from the LVT. 226 */ 227 boolean sawMethodParameters; 228 229 /** 230 * The set of attribute names for which warnings have been generated for the current class 231 */ 232 Set<Name> warnedAttrs = new HashSet<Name>(); 233 234 /** 235 * Completer that delegates to the complete-method of this class. 236 */ 237 private final Completer thisCompleter = new Completer() { 238 @Override 239 public void complete(Symbol sym) throws CompletionFailure { 240 ClassReader.this.complete(sym); 241 } 242 }; 243 244 245 /** Get the ClassReader instance for this invocation. */ 246 public static ClassReader instance(Context context) { 247 ClassReader instance = context.get(classReaderKey); 248 if (instance == null) 249 instance = new ClassReader(context, true); 250 return instance; 251 } 252 253 /** Initialize classes and packages, treating this as the definitive classreader. */ 254 public void init(Symtab syms) { 255 init(syms, true); 256 } 257 258 /** Initialize classes and packages, optionally treating this as 259 * the definitive classreader. 260 */ 261 private void init(Symtab syms, boolean definitive) { 262 if (classes != null) return; 263 264 if (definitive) { 265 Assert.check(packages == null || packages == syms.packages); 266 packages = syms.packages; 267 Assert.check(classes == null || classes == syms.classes); 268 classes = syms.classes; 269 } else { 270 packages = new HashMap<Name, PackageSymbol>(); 271 classes = new HashMap<Name, ClassSymbol>(); 272 } 273 274 packages.put(names.empty, syms.rootPackage); 275 syms.rootPackage.completer = thisCompleter; 276 syms.unnamedPackage.completer = thisCompleter; 277 } 278 279 /** Construct a new class reader, optionally treated as the 280 * definitive classreader for this invocation. 281 */ 282 protected ClassReader(Context context, boolean definitive) { 283 if (definitive) context.put(classReaderKey, this); 284 285 names = Names.instance(context); 286 syms = Symtab.instance(context); 287 types = Types.instance(context); 288 fileManager = context.get(JavaFileManager.class); 289 if (fileManager == null) 290 throw new AssertionError("FileManager initialization error"); 291 diagFactory = JCDiagnostic.Factory.instance(context); 292 293 init(syms, definitive); 294 log = Log.instance(context); 295 296 Options options = Options.instance(context); 297 annotate = Annotate.instance(context); 298 verbose = options.isSet(VERBOSE); 299 checkClassFile = options.isSet("-checkclassfile"); 300 301 Source source = Source.instance(context); 302 allowGenerics = source.allowGenerics(); 303 allowVarargs = source.allowVarargs(); 304 allowAnnotations = source.allowAnnotations(); 305 allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 306 307 saveParameterNames = options.isSet("save-parameter-names"); 308 cacheCompletionFailure = options.isUnset("dev"); 309 preferSource = "source".equals(options.get("-Xprefer")); 310 311 profile = Profile.instance(context); 312 313 completionFailureName = 314 options.isSet("failcomplete") 315 ? names.fromString(options.get("failcomplete")) 316 : null; 317 318 typevars = new Scope(syms.noSymbol); 319 320 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 321 322 initAttributeReaders(); 323 } 324 325 /** Add member to class unless it is synthetic. 326 */ 327 private void enterMember(ClassSymbol c, Symbol sym) { 328 // Synthetic members are not entered -- reason lost to history (optimization?). 329 // Lambda methods must be entered because they may have inner classes (which reference them) 330 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 331 c.members_field.enter(sym); 332 } 333 334 /************************************************************************ 335 * Error Diagnoses 336 ***********************************************************************/ 337 338 339 public class BadClassFile extends CompletionFailure { 340 private static final long serialVersionUID = 0; 341 342 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) { 343 super(sym, createBadClassFileDiagnostic(file, diag)); 344 } 345 } 346 // where 347 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) { 348 String key = (file.getKind() == JavaFileObject.Kind.SOURCE 349 ? "bad.source.file.header" : "bad.class.file.header"); 350 return diagFactory.fragment(key, file, diag); 351 } 352 353 public BadClassFile badClassFile(String key, Object... args) { 354 return new BadClassFile ( 355 currentOwner.enclClass(), 356 currentClassFile, 357 diagFactory.fragment(key, args)); 358 } 359 360 /************************************************************************ 361 * Buffer Access 362 ***********************************************************************/ 363 364 /** Read a character. 365 */ 366 char nextChar() { 367 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 368 } 369 370 /** Read a byte. 371 */ 372 int nextByte() { 373 return buf[bp++] & 0xFF; 374 } 375 376 /** Read an integer. 377 */ 378 int nextInt() { 379 return 380 ((buf[bp++] & 0xFF) << 24) + 381 ((buf[bp++] & 0xFF) << 16) + 382 ((buf[bp++] & 0xFF) << 8) + 383 (buf[bp++] & 0xFF); 384 } 385 386 /** Extract a character at position bp from buf. 387 */ 388 char getChar(int bp) { 389 return 390 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 391 } 392 393 /** Extract an integer at position bp from buf. 394 */ 395 int getInt(int bp) { 396 return 397 ((buf[bp] & 0xFF) << 24) + 398 ((buf[bp+1] & 0xFF) << 16) + 399 ((buf[bp+2] & 0xFF) << 8) + 400 (buf[bp+3] & 0xFF); 401 } 402 403 404 /** Extract a long integer at position bp from buf. 405 */ 406 long getLong(int bp) { 407 DataInputStream bufin = 408 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 409 try { 410 return bufin.readLong(); 411 } catch (IOException e) { 412 throw new AssertionError(e); 413 } 414 } 415 416 /** Extract a float at position bp from buf. 417 */ 418 float getFloat(int bp) { 419 DataInputStream bufin = 420 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 421 try { 422 return bufin.readFloat(); 423 } catch (IOException e) { 424 throw new AssertionError(e); 425 } 426 } 427 428 /** Extract a double at position bp from buf. 429 */ 430 double getDouble(int bp) { 431 DataInputStream bufin = 432 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 433 try { 434 return bufin.readDouble(); 435 } catch (IOException e) { 436 throw new AssertionError(e); 437 } 438 } 439 440 /************************************************************************ 441 * Constant Pool Access 442 ***********************************************************************/ 443 444 /** Index all constant pool entries, writing their start addresses into 445 * poolIdx. 446 */ 447 void indexPool() { 448 poolIdx = new int[nextChar()]; 449 poolObj = new Object[poolIdx.length]; 450 int i = 1; 451 while (i < poolIdx.length) { 452 poolIdx[i++] = bp; 453 byte tag = buf[bp++]; 454 switch (tag) { 455 case CONSTANT_Utf8: case CONSTANT_Unicode: { 456 int len = nextChar(); 457 bp = bp + len; 458 break; 459 } 460 case CONSTANT_Class: 461 case CONSTANT_String: 462 case CONSTANT_MethodType: 463 bp = bp + 2; 464 break; 465 case CONSTANT_MethodHandle: 466 bp = bp + 3; 467 break; 468 case CONSTANT_Fieldref: 469 case CONSTANT_Methodref: 470 case CONSTANT_InterfaceMethodref: 471 case CONSTANT_NameandType: 472 case CONSTANT_Integer: 473 case CONSTANT_Float: 474 case CONSTANT_InvokeDynamic: 475 bp = bp + 4; 476 break; 477 case CONSTANT_Long: 478 case CONSTANT_Double: 479 bp = bp + 8; 480 i++; 481 break; 482 default: 483 throw badClassFile("bad.const.pool.tag.at", 484 Byte.toString(tag), 485 Integer.toString(bp -1)); 486 } 487 } 488 } 489 490 /** Read constant pool entry at start address i, use pool as a cache. 491 */ 492 Object readPool(int i) { 493 Object result = poolObj[i]; 494 if (result != null) return result; 495 496 int index = poolIdx[i]; 497 if (index == 0) return null; 498 499 byte tag = buf[index]; 500 switch (tag) { 501 case CONSTANT_Utf8: 502 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 503 break; 504 case CONSTANT_Unicode: 505 throw badClassFile("unicode.str.not.supported"); 506 case CONSTANT_Class: 507 poolObj[i] = readClassOrType(getChar(index + 1)); 508 break; 509 case CONSTANT_String: 510 // FIXME: (footprint) do not use toString here 511 poolObj[i] = readName(getChar(index + 1)).toString(); 512 break; 513 case CONSTANT_Fieldref: { 514 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 515 NameAndType nt = readNameAndType(getChar(index + 3)); 516 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 517 break; 518 } 519 case CONSTANT_Methodref: 520 case CONSTANT_InterfaceMethodref: { 521 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 522 NameAndType nt = readNameAndType(getChar(index + 3)); 523 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 524 break; 525 } 526 case CONSTANT_NameandType: 527 poolObj[i] = new NameAndType( 528 readName(getChar(index + 1)), 529 readType(getChar(index + 3)), types); 530 break; 531 case CONSTANT_Integer: 532 poolObj[i] = getInt(index + 1); 533 break; 534 case CONSTANT_Float: 535 poolObj[i] = new Float(getFloat(index + 1)); 536 break; 537 case CONSTANT_Long: 538 poolObj[i] = new Long(getLong(index + 1)); 539 break; 540 case CONSTANT_Double: 541 poolObj[i] = new Double(getDouble(index + 1)); 542 break; 543 case CONSTANT_MethodHandle: 544 skipBytes(4); 545 break; 546 case CONSTANT_MethodType: 547 skipBytes(3); 548 break; 549 case CONSTANT_InvokeDynamic: 550 skipBytes(5); 551 break; 552 default: 553 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 554 } 555 return poolObj[i]; 556 } 557 558 /** Read signature and convert to type. 559 */ 560 Type readType(int i) { 561 int index = poolIdx[i]; 562 return sigToType(buf, index + 3, getChar(index + 1)); 563 } 564 565 /** If name is an array type or class signature, return the 566 * corresponding type; otherwise return a ClassSymbol with given name. 567 */ 568 Object readClassOrType(int i) { 569 int index = poolIdx[i]; 570 int len = getChar(index + 1); 571 int start = index + 3; 572 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 573 // by the above assertion, the following test can be 574 // simplified to (buf[start] == '[') 575 return (buf[start] == '[' || buf[start + len - 1] == ';') 576 ? (Object)sigToType(buf, start, len) 577 : (Object)enterClass(names.fromUtf(internalize(buf, start, 578 len))); 579 } 580 581 /** Read signature and convert to type parameters. 582 */ 583 List<Type> readTypeParams(int i) { 584 int index = poolIdx[i]; 585 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 586 } 587 588 /** Read class entry. 589 */ 590 ClassSymbol readClassSymbol(int i) { 591 Object obj = readPool(i); 592 if (obj != null && !(obj instanceof ClassSymbol)) 593 throw badClassFile("bad.const.pool.entry", 594 currentClassFile.toString(), 595 "CONSTANT_Class_info", i); 596 return (ClassSymbol)obj; 597 } 598 599 /** Read name. 600 */ 601 Name readName(int i) { 602 Object obj = readPool(i); 603 if (obj != null && !(obj instanceof Name)) 604 throw badClassFile("bad.const.pool.entry", 605 currentClassFile.toString(), 606 "CONSTANT_Utf8_info or CONSTANT_String_info", i); 607 return (Name)obj; 608 } 609 610 /** Read name and type. 611 */ 612 NameAndType readNameAndType(int i) { 613 Object obj = readPool(i); 614 if (obj != null && !(obj instanceof NameAndType)) 615 throw badClassFile("bad.const.pool.entry", 616 currentClassFile.toString(), 617 "CONSTANT_NameAndType_info", i); 618 return (NameAndType)obj; 619 } 620 621 /************************************************************************ 622 * Reading Types 623 ***********************************************************************/ 624 625 /** The unread portion of the currently read type is 626 * signature[sigp..siglimit-1]. 627 */ 628 byte[] signature; 629 int sigp; 630 int siglimit; 631 boolean sigEnterPhase = false; 632 633 /** Convert signature to type, where signature is a byte array segment. 634 */ 635 Type sigToType(byte[] sig, int offset, int len) { 636 signature = sig; 637 sigp = offset; 638 siglimit = offset + len; 639 return sigToType(); 640 } 641 642 /** Convert signature to type, where signature is implicit. 643 */ 644 Type sigToType() { 645 switch ((char) signature[sigp]) { 646 case 'T': 647 sigp++; 648 int start = sigp; 649 while (signature[sigp] != ';') sigp++; 650 sigp++; 651 return sigEnterPhase 652 ? Type.noType 653 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 654 case '+': { 655 sigp++; 656 Type t = sigToType(); 657 return new WildcardType(t, BoundKind.EXTENDS, 658 syms.boundClass); 659 } 660 case '*': 661 sigp++; 662 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 663 syms.boundClass); 664 case '-': { 665 sigp++; 666 Type t = sigToType(); 667 return new WildcardType(t, BoundKind.SUPER, 668 syms.boundClass); 669 } 670 case 'B': 671 sigp++; 672 return syms.byteType; 673 case 'C': 674 sigp++; 675 return syms.charType; 676 case 'D': 677 sigp++; 678 return syms.doubleType; 679 case 'F': 680 sigp++; 681 return syms.floatType; 682 case 'I': 683 sigp++; 684 return syms.intType; 685 case 'J': 686 sigp++; 687 return syms.longType; 688 case 'L': 689 { 690 // int oldsigp = sigp; 691 Type t = classSigToType(); 692 if (sigp < siglimit && signature[sigp] == '.') 693 throw badClassFile("deprecated inner class signature syntax " + 694 "(please recompile from source)"); 695 /* 696 System.err.println(" decoded " + 697 new String(signature, oldsigp, sigp-oldsigp) + 698 " => " + t + " outer " + t.outer()); 699 */ 700 return t; 701 } 702 case 'S': 703 sigp++; 704 return syms.shortType; 705 case 'V': 706 sigp++; 707 return syms.voidType; 708 case 'Z': 709 sigp++; 710 return syms.booleanType; 711 case '[': 712 sigp++; 713 return new ArrayType(sigToType(), syms.arrayClass); 714 case '(': 715 sigp++; 716 List<Type> argtypes = sigToTypes(')'); 717 Type restype = sigToType(); 718 List<Type> thrown = List.nil(); 719 while (signature[sigp] == '^') { 720 sigp++; 721 thrown = thrown.prepend(sigToType()); 722 } 723 // if there is a typevar in the throws clause we should state it. 724 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 725 if (l.head.hasTag(TYPEVAR)) { 726 l.head.tsym.flags_field |= THROWS; 727 } 728 } 729 return new MethodType(argtypes, 730 restype, 731 thrown.reverse(), 732 syms.methodClass); 733 case '<': 734 typevars = typevars.dup(currentOwner); 735 Type poly = new ForAll(sigToTypeParams(), sigToType()); 736 typevars = typevars.leave(); 737 return poly; 738 default: 739 throw badClassFile("bad.signature", 740 Convert.utf2string(signature, sigp, 10)); 741 } 742 } 743 744 byte[] signatureBuffer = new byte[0]; 745 int sbp = 0; 746 /** Convert class signature to type, where signature is implicit. 747 */ 748 Type classSigToType() { 749 if (signature[sigp] != 'L') 750 throw badClassFile("bad.class.signature", 751 Convert.utf2string(signature, sigp, 10)); 752 sigp++; 753 Type outer = Type.noType; 754 int startSbp = sbp; 755 756 while (true) { 757 final byte c = signature[sigp++]; 758 switch (c) { 759 760 case ';': { // end 761 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 762 startSbp, 763 sbp - startSbp)); 764 765 try { 766 return (outer == Type.noType) ? 767 t.erasure(types) : 768 new ClassType(outer, List.<Type>nil(), t); 769 } finally { 770 sbp = startSbp; 771 } 772 } 773 774 case '<': // generic arguments 775 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer, 776 startSbp, 777 sbp - startSbp)); 778 outer = new ClassType(outer, sigToTypes('>'), t) { 779 boolean completed = false; 780 @Override 781 public Type getEnclosingType() { 782 if (!completed) { 783 completed = true; 784 tsym.complete(); 785 Type enclosingType = tsym.type.getEnclosingType(); 786 if (enclosingType != Type.noType) { 787 List<Type> typeArgs = 788 super.getEnclosingType().allparams(); 789 List<Type> typeParams = 790 enclosingType.allparams(); 791 if (typeParams.length() != typeArgs.length()) { 792 // no "rare" types 793 super.setEnclosingType(types.erasure(enclosingType)); 794 } else { 795 super.setEnclosingType(types.subst(enclosingType, 796 typeParams, 797 typeArgs)); 798 } 799 } else { 800 super.setEnclosingType(Type.noType); 801 } 802 } 803 return super.getEnclosingType(); 804 } 805 @Override 806 public void setEnclosingType(Type outer) { 807 throw new UnsupportedOperationException(); 808 } 809 }; 810 switch (signature[sigp++]) { 811 case ';': 812 if (sigp < signature.length && signature[sigp] == '.') { 813 // support old-style GJC signatures 814 // The signature produced was 815 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 816 // rather than say 817 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 818 // so we skip past ".Lfoo/Outer$" 819 sigp += (sbp - startSbp) + // "foo/Outer" 820 3; // ".L" and "$" 821 signatureBuffer[sbp++] = (byte)'$'; 822 break; 823 } else { 824 sbp = startSbp; 825 return outer; 826 } 827 case '.': 828 signatureBuffer[sbp++] = (byte)'$'; 829 break; 830 default: 831 throw new AssertionError(signature[sigp-1]); 832 } 833 continue; 834 835 case '.': 836 //we have seen an enclosing non-generic class 837 if (outer != Type.noType) { 838 t = enterClass(names.fromUtf(signatureBuffer, 839 startSbp, 840 sbp - startSbp)); 841 outer = new ClassType(outer, List.<Type>nil(), t); 842 } 843 signatureBuffer[sbp++] = (byte)'$'; 844 continue; 845 case '/': 846 signatureBuffer[sbp++] = (byte)'.'; 847 continue; 848 default: 849 signatureBuffer[sbp++] = c; 850 continue; 851 } 852 } 853 } 854 855 /** Convert (implicit) signature to list of types 856 * until `terminator' is encountered. 857 */ 858 List<Type> sigToTypes(char terminator) { 859 List<Type> head = List.of(null); 860 List<Type> tail = head; 861 while (signature[sigp] != terminator) 862 tail = tail.setTail(List.of(sigToType())); 863 sigp++; 864 return head.tail; 865 } 866 867 /** Convert signature to type parameters, where signature is a byte 868 * array segment. 869 */ 870 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 871 signature = sig; 872 sigp = offset; 873 siglimit = offset + len; 874 return sigToTypeParams(); 875 } 876 877 /** Convert signature to type parameters, where signature is implicit. 878 */ 879 List<Type> sigToTypeParams() { 880 List<Type> tvars = List.nil(); 881 if (signature[sigp] == '<') { 882 sigp++; 883 int start = sigp; 884 sigEnterPhase = true; 885 while (signature[sigp] != '>') 886 tvars = tvars.prepend(sigToTypeParam()); 887 sigEnterPhase = false; 888 sigp = start; 889 while (signature[sigp] != '>') 890 sigToTypeParam(); 891 sigp++; 892 } 893 return tvars.reverse(); 894 } 895 896 /** Convert (implicit) signature to type parameter. 897 */ 898 Type sigToTypeParam() { 899 int start = sigp; 900 while (signature[sigp] != ':') sigp++; 901 Name name = names.fromUtf(signature, start, sigp - start); 902 TypeVar tvar; 903 if (sigEnterPhase) { 904 tvar = new TypeVar(name, currentOwner, syms.botType); 905 typevars.enter(tvar.tsym); 906 } else { 907 tvar = (TypeVar)findTypeVar(name); 908 } 909 List<Type> bounds = List.nil(); 910 boolean allInterfaces = false; 911 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 912 sigp++; 913 allInterfaces = true; 914 } 915 while (signature[sigp] == ':') { 916 sigp++; 917 bounds = bounds.prepend(sigToType()); 918 } 919 if (!sigEnterPhase) { 920 types.setBounds(tvar, bounds.reverse(), allInterfaces); 921 } 922 return tvar; 923 } 924 925 /** Find type variable with given name in `typevars' scope. 926 */ 927 Type findTypeVar(Name name) { 928 Scope.Entry e = typevars.lookup(name); 929 if (e.scope != null) { 930 return e.sym.type; 931 } else { 932 if (readingClassAttr) { 933 // While reading the class attribute, the supertypes 934 // might refer to a type variable from an enclosing element 935 // (method or class). 936 // If the type variable is defined in the enclosing class, 937 // we can actually find it in 938 // currentOwner.owner.type.getTypeArguments() 939 // However, until we have read the enclosing method attribute 940 // we don't know for sure if this owner is correct. It could 941 // be a method and there is no way to tell before reading the 942 // enclosing method attribute. 943 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 944 missingTypeVariables = missingTypeVariables.prepend(t); 945 // System.err.println("Missing type var " + name); 946 return t; 947 } 948 throw badClassFile("undecl.type.var", name); 949 } 950 } 951 952 /************************************************************************ 953 * Reading Attributes 954 ***********************************************************************/ 955 956 protected enum AttributeKind { CLASS, MEMBER }; 957 protected abstract class AttributeReader { 958 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 959 this.name = name; 960 this.version = version; 961 this.kinds = kinds; 962 } 963 964 protected boolean accepts(AttributeKind kind) { 965 if (kinds.contains(kind)) { 966 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 967 return true; 968 969 if (lintClassfile && !warnedAttrs.contains(name)) { 970 JavaFileObject prev = log.useSource(currentClassFile); 971 try { 972 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr", 973 name, version.major, version.minor, majorVersion, minorVersion); 974 } finally { 975 log.useSource(prev); 976 } 977 warnedAttrs.add(name); 978 } 979 } 980 return false; 981 } 982 983 protected abstract void read(Symbol sym, int attrLen); 984 985 protected final Name name; 986 protected final ClassFile.Version version; 987 protected final Set<AttributeKind> kinds; 988 } 989 990 protected Set<AttributeKind> CLASS_ATTRIBUTE = 991 EnumSet.of(AttributeKind.CLASS); 992 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 993 EnumSet.of(AttributeKind.MEMBER); 994 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 995 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 996 997 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>(); 998 999 private void initAttributeReaders() { 1000 AttributeReader[] readers = { 1001 // v45.3 attributes 1002 1003 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 1004 protected void read(Symbol sym, int attrLen) { 1005 if (readAllOfClassFile || saveParameterNames) 1006 ((MethodSymbol)sym).code = readCode(sym); 1007 else 1008 bp = bp + attrLen; 1009 } 1010 }, 1011 1012 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 1013 protected void read(Symbol sym, int attrLen) { 1014 Object v = readPool(nextChar()); 1015 // Ignore ConstantValue attribute if field not final. 1016 if ((sym.flags() & FINAL) != 0) 1017 ((VarSymbol) sym).setData(v); 1018 } 1019 }, 1020 1021 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1022 protected void read(Symbol sym, int attrLen) { 1023 sym.flags_field |= DEPRECATED; 1024 } 1025 }, 1026 1027 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1028 protected void read(Symbol sym, int attrLen) { 1029 int nexceptions = nextChar(); 1030 List<Type> thrown = List.nil(); 1031 for (int j = 0; j < nexceptions; j++) 1032 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 1033 if (sym.type.getThrownTypes().isEmpty()) 1034 sym.type.asMethodType().thrown = thrown.reverse(); 1035 } 1036 }, 1037 1038 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 1039 protected void read(Symbol sym, int attrLen) { 1040 ClassSymbol c = (ClassSymbol) sym; 1041 readInnerClasses(c); 1042 } 1043 }, 1044 1045 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1046 protected void read(Symbol sym, int attrLen) { 1047 int newbp = bp + attrLen; 1048 if (saveParameterNames && !sawMethodParameters) { 1049 // Pick up parameter names from the variable table. 1050 // Parameter names are not explicitly identified as such, 1051 // but all parameter name entries in the LocalVariableTable 1052 // have a start_pc of 0. Therefore, we record the name 1053 // indicies of all slots with a start_pc of zero in the 1054 // parameterNameIndicies array. 1055 // Note that this implicitly honors the JVMS spec that 1056 // there may be more than one LocalVariableTable, and that 1057 // there is no specified ordering for the entries. 1058 int numEntries = nextChar(); 1059 for (int i = 0; i < numEntries; i++) { 1060 int start_pc = nextChar(); 1061 int length = nextChar(); 1062 int nameIndex = nextChar(); 1063 int sigIndex = nextChar(); 1064 int register = nextChar(); 1065 if (start_pc == 0) { 1066 // ensure array large enough 1067 if (register >= parameterNameIndices.length) { 1068 int newSize = Math.max(register, parameterNameIndices.length + 8); 1069 parameterNameIndices = 1070 Arrays.copyOf(parameterNameIndices, newSize); 1071 } 1072 parameterNameIndices[register] = nameIndex; 1073 haveParameterNameIndices = true; 1074 } 1075 } 1076 } 1077 bp = newbp; 1078 } 1079 }, 1080 1081 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 1082 protected void read(Symbol sym, int attrlen) { 1083 int newbp = bp + attrlen; 1084 if (saveParameterNames) { 1085 sawMethodParameters = true; 1086 int numEntries = nextByte(); 1087 parameterNameIndices = new int[numEntries]; 1088 haveParameterNameIndices = true; 1089 for (int i = 0; i < numEntries; i++) { 1090 int nameIndex = nextChar(); 1091 int flags = nextChar(); 1092 parameterNameIndices[i] = nameIndex; 1093 } 1094 } 1095 bp = newbp; 1096 } 1097 }, 1098 1099 1100 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 1101 protected void read(Symbol sym, int attrLen) { 1102 ClassSymbol c = (ClassSymbol) sym; 1103 Name n = readName(nextChar()); 1104 c.sourcefile = new SourceFileObject(n, c.flatname); 1105 // If the class is a toplevel class, originating from a Java source file, 1106 // but the class name does not match the file name, then it is 1107 // an auxiliary class. 1108 String sn = n.toString(); 1109 if (c.owner.kind == Kinds.PCK && 1110 sn.endsWith(".java") && 1111 !sn.equals(c.name.toString()+".java")) { 1112 c.flags_field |= AUXILIARY; 1113 } 1114 } 1115 }, 1116 1117 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1118 protected void read(Symbol sym, int attrLen) { 1119 // bridge methods are visible when generics not enabled 1120 if (allowGenerics || (sym.flags_field & BRIDGE) == 0) 1121 sym.flags_field |= SYNTHETIC; 1122 } 1123 }, 1124 1125 // standard v49 attributes 1126 1127 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1128 protected void read(Symbol sym, int attrLen) { 1129 int newbp = bp + attrLen; 1130 readEnclosingMethodAttr(sym); 1131 bp = newbp; 1132 } 1133 }, 1134 1135 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1136 @Override 1137 protected boolean accepts(AttributeKind kind) { 1138 return super.accepts(kind) && allowGenerics; 1139 } 1140 1141 protected void read(Symbol sym, int attrLen) { 1142 if (sym.kind == TYP) { 1143 ClassSymbol c = (ClassSymbol) sym; 1144 readingClassAttr = true; 1145 try { 1146 ClassType ct1 = (ClassType)c.type; 1147 Assert.check(c == currentOwner); 1148 ct1.typarams_field = readTypeParams(nextChar()); 1149 ct1.supertype_field = sigToType(); 1150 ListBuffer<Type> is = new ListBuffer<Type>(); 1151 while (sigp != siglimit) is.append(sigToType()); 1152 ct1.interfaces_field = is.toList(); 1153 } finally { 1154 readingClassAttr = false; 1155 } 1156 } else { 1157 List<Type> thrown = sym.type.getThrownTypes(); 1158 sym.type = readType(nextChar()); 1159 //- System.err.println(" # " + sym.type); 1160 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1161 sym.type.asMethodType().thrown = thrown; 1162 1163 } 1164 } 1165 }, 1166 1167 // v49 annotation attributes 1168 1169 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1170 protected void read(Symbol sym, int attrLen) { 1171 attachAnnotationDefault(sym); 1172 } 1173 }, 1174 1175 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1176 protected void read(Symbol sym, int attrLen) { 1177 attachAnnotations(sym); 1178 } 1179 }, 1180 1181 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1182 protected void read(Symbol sym, int attrLen) { 1183 attachParameterAnnotations(sym); 1184 } 1185 }, 1186 1187 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1188 protected void read(Symbol sym, int attrLen) { 1189 attachAnnotations(sym); 1190 } 1191 }, 1192 1193 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1194 protected void read(Symbol sym, int attrLen) { 1195 attachParameterAnnotations(sym); 1196 } 1197 }, 1198 1199 // additional "legacy" v49 attributes, superceded by flags 1200 1201 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1202 protected void read(Symbol sym, int attrLen) { 1203 if (allowAnnotations) 1204 sym.flags_field |= ANNOTATION; 1205 } 1206 }, 1207 1208 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1209 protected void read(Symbol sym, int attrLen) { 1210 sym.flags_field |= BRIDGE; 1211 if (!allowGenerics) 1212 sym.flags_field &= ~SYNTHETIC; 1213 } 1214 }, 1215 1216 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1217 protected void read(Symbol sym, int attrLen) { 1218 sym.flags_field |= ENUM; 1219 } 1220 }, 1221 1222 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1223 protected void read(Symbol sym, int attrLen) { 1224 if (allowVarargs) 1225 sym.flags_field |= VARARGS; 1226 } 1227 }, 1228 1229 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1230 protected void read(Symbol sym, int attrLen) { 1231 attachTypeAnnotations(sym); 1232 } 1233 }, 1234 1235 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1236 protected void read(Symbol sym, int attrLen) { 1237 attachTypeAnnotations(sym); 1238 } 1239 }, 1240 1241 1242 // The following attributes for a Code attribute are not currently handled 1243 // StackMapTable 1244 // SourceDebugExtension 1245 // LineNumberTable 1246 // LocalVariableTypeTable 1247 }; 1248 1249 for (AttributeReader r: readers) 1250 attributeReaders.put(r.name, r); 1251 } 1252 1253 /** Report unrecognized attribute. 1254 */ 1255 void unrecognized(Name attrName) { 1256 if (checkClassFile) 1257 printCCF("ccf.unrecognized.attribute", attrName); 1258 } 1259 1260 1261 1262 protected void readEnclosingMethodAttr(Symbol sym) { 1263 // sym is a nested class with an "Enclosing Method" attribute 1264 // remove sym from it's current owners scope and place it in 1265 // the scope specified by the attribute 1266 sym.owner.members().remove(sym); 1267 ClassSymbol self = (ClassSymbol)sym; 1268 ClassSymbol c = readClassSymbol(nextChar()); 1269 NameAndType nt = readNameAndType(nextChar()); 1270 1271 if (c.members_field == null) 1272 throw badClassFile("bad.enclosing.class", self, c); 1273 1274 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1275 if (nt != null && m == null) 1276 throw badClassFile("bad.enclosing.method", self); 1277 1278 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1279 self.owner = m != null ? m : c; 1280 if (self.name.isEmpty()) 1281 self.fullname = names.empty; 1282 else 1283 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1284 1285 if (m != null) { 1286 ((ClassType)sym.type).setEnclosingType(m.type); 1287 } else if ((self.flags_field & STATIC) == 0) { 1288 ((ClassType)sym.type).setEnclosingType(c.type); 1289 } else { 1290 ((ClassType)sym.type).setEnclosingType(Type.noType); 1291 } 1292 enterTypevars(self); 1293 if (!missingTypeVariables.isEmpty()) { 1294 ListBuffer<Type> typeVars = new ListBuffer<Type>(); 1295 for (Type typevar : missingTypeVariables) { 1296 typeVars.append(findTypeVar(typevar.tsym.name)); 1297 } 1298 foundTypeVariables = typeVars.toList(); 1299 } else { 1300 foundTypeVariables = List.nil(); 1301 } 1302 } 1303 1304 // See java.lang.Class 1305 private Name simpleBinaryName(Name self, Name enclosing) { 1306 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1307 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1308 throw badClassFile("bad.enclosing.method", self); 1309 int index = 1; 1310 while (index < simpleBinaryName.length() && 1311 isAsciiDigit(simpleBinaryName.charAt(index))) 1312 index++; 1313 return names.fromString(simpleBinaryName.substring(index)); 1314 } 1315 1316 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1317 if (nt == null) 1318 return null; 1319 1320 MethodType type = nt.uniqueType.type.asMethodType(); 1321 1322 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next()) 1323 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type)) 1324 return (MethodSymbol)e.sym; 1325 1326 if (nt.name != names.init) 1327 // not a constructor 1328 return null; 1329 if ((flags & INTERFACE) != 0) 1330 // no enclosing instance 1331 return null; 1332 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1333 // no parameters 1334 return null; 1335 1336 // A constructor of an inner class. 1337 // Remove the first argument (the enclosing instance) 1338 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1339 nt.uniqueType.type.getReturnType(), 1340 nt.uniqueType.type.getThrownTypes(), 1341 syms.methodClass)); 1342 // Try searching again 1343 return findMethod(nt, scope, flags); 1344 } 1345 1346 /** Similar to Types.isSameType but avoids completion */ 1347 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1348 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1349 .prepend(types.erasure(mt1.getReturnType())); 1350 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1351 while (!types1.isEmpty() && !types2.isEmpty()) { 1352 if (types1.head.tsym != types2.head.tsym) 1353 return false; 1354 types1 = types1.tail; 1355 types2 = types2.tail; 1356 } 1357 return types1.isEmpty() && types2.isEmpty(); 1358 } 1359 1360 /** 1361 * Character.isDigit answers <tt>true</tt> to some non-ascii 1362 * digits. This one does not. <b>copied from java.lang.Class</b> 1363 */ 1364 private static boolean isAsciiDigit(char c) { 1365 return '0' <= c && c <= '9'; 1366 } 1367 1368 /** Read member attributes. 1369 */ 1370 void readMemberAttrs(Symbol sym) { 1371 readAttrs(sym, AttributeKind.MEMBER); 1372 } 1373 1374 void readAttrs(Symbol sym, AttributeKind kind) { 1375 char ac = nextChar(); 1376 for (int i = 0; i < ac; i++) { 1377 Name attrName = readName(nextChar()); 1378 int attrLen = nextInt(); 1379 AttributeReader r = attributeReaders.get(attrName); 1380 if (r != null && r.accepts(kind)) 1381 r.read(sym, attrLen); 1382 else { 1383 unrecognized(attrName); 1384 bp = bp + attrLen; 1385 } 1386 } 1387 } 1388 1389 private boolean readingClassAttr = false; 1390 private List<Type> missingTypeVariables = List.nil(); 1391 private List<Type> foundTypeVariables = List.nil(); 1392 1393 /** Read class attributes. 1394 */ 1395 void readClassAttrs(ClassSymbol c) { 1396 readAttrs(c, AttributeKind.CLASS); 1397 } 1398 1399 /** Read code block. 1400 */ 1401 Code readCode(Symbol owner) { 1402 nextChar(); // max_stack 1403 nextChar(); // max_locals 1404 final int code_length = nextInt(); 1405 bp += code_length; 1406 final char exception_table_length = nextChar(); 1407 bp += exception_table_length * 8; 1408 readMemberAttrs(owner); 1409 return null; 1410 } 1411 1412 /************************************************************************ 1413 * Reading Java-language annotations 1414 ***********************************************************************/ 1415 1416 /** Attach annotations. 1417 */ 1418 void attachAnnotations(final Symbol sym) { 1419 int numAttributes = nextChar(); 1420 if (numAttributes != 0) { 1421 ListBuffer<CompoundAnnotationProxy> proxies = 1422 new ListBuffer<CompoundAnnotationProxy>(); 1423 for (int i = 0; i<numAttributes; i++) { 1424 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1425 if (proxy.type.tsym == syms.proprietaryType.tsym) 1426 sym.flags_field |= PROPRIETARY; 1427 else if (proxy.type.tsym == syms.profileType.tsym) { 1428 if (profile != Profile.DEFAULT) { 1429 for (Pair<Name,Attribute> v: proxy.values) { 1430 if (v.fst == names.value && v.snd instanceof Attribute.Constant) { 1431 Attribute.Constant c = (Attribute.Constant) v.snd; 1432 if (c.type == syms.intType && ((Integer) c.value) > profile.value) { 1433 sym.flags_field |= NOT_IN_PROFILE; 1434 } 1435 } 1436 } 1437 } 1438 } else 1439 proxies.append(proxy); 1440 } 1441 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1442 } 1443 } 1444 1445 /** Attach parameter annotations. 1446 */ 1447 void attachParameterAnnotations(final Symbol method) { 1448 final MethodSymbol meth = (MethodSymbol)method; 1449 int numParameters = buf[bp++] & 0xFF; 1450 List<VarSymbol> parameters = meth.params(); 1451 int pnum = 0; 1452 while (parameters.tail != null) { 1453 attachAnnotations(parameters.head); 1454 parameters = parameters.tail; 1455 pnum++; 1456 } 1457 if (pnum != numParameters) { 1458 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1459 } 1460 } 1461 1462 void attachTypeAnnotations(final Symbol sym) { 1463 int numAttributes = nextChar(); 1464 if (numAttributes != 0) { 1465 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1466 for (int i = 0; i < numAttributes; i++) 1467 proxies.append(readTypeAnnotation()); 1468 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1469 } 1470 } 1471 1472 /** Attach the default value for an annotation element. 1473 */ 1474 void attachAnnotationDefault(final Symbol sym) { 1475 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1476 final Attribute value = readAttributeValue(); 1477 1478 // The default value is set later during annotation. It might 1479 // be the case that the Symbol sym is annotated _after_ the 1480 // repeating instances that depend on this default value, 1481 // because of this we set an interim value that tells us this 1482 // element (most likely) has a default. 1483 // 1484 // Set interim value for now, reset just before we do this 1485 // properly at annotate time. 1486 meth.defaultValue = value; 1487 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1488 } 1489 1490 Type readTypeOrClassSymbol(int i) { 1491 // support preliminary jsr175-format class files 1492 if (buf[poolIdx[i]] == CONSTANT_Class) 1493 return readClassSymbol(i).type; 1494 return readType(i); 1495 } 1496 Type readEnumType(int i) { 1497 // support preliminary jsr175-format class files 1498 int index = poolIdx[i]; 1499 int length = getChar(index + 1); 1500 if (buf[index + length + 2] != ';') 1501 return enterClass(readName(i)).type; 1502 return readType(i); 1503 } 1504 1505 CompoundAnnotationProxy readCompoundAnnotation() { 1506 Type t = readTypeOrClassSymbol(nextChar()); 1507 int numFields = nextChar(); 1508 ListBuffer<Pair<Name,Attribute>> pairs = 1509 new ListBuffer<Pair<Name,Attribute>>(); 1510 for (int i=0; i<numFields; i++) { 1511 Name name = readName(nextChar()); 1512 Attribute value = readAttributeValue(); 1513 pairs.append(new Pair<Name,Attribute>(name, value)); 1514 } 1515 return new CompoundAnnotationProxy(t, pairs.toList()); 1516 } 1517 1518 TypeAnnotationProxy readTypeAnnotation() { 1519 TypeAnnotationPosition position = readPosition(); 1520 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1521 1522 return new TypeAnnotationProxy(proxy, position); 1523 } 1524 1525 TypeAnnotationPosition readPosition() { 1526 int tag = nextByte(); // TargetType tag is a byte 1527 1528 if (!TargetType.isValidTargetTypeValue(tag)) 1529 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1530 1531 TypeAnnotationPosition position = new TypeAnnotationPosition(); 1532 TargetType type = TargetType.fromTargetTypeValue(tag); 1533 1534 position.type = type; 1535 1536 switch (type) { 1537 // instanceof 1538 case INSTANCEOF: 1539 // new expression 1540 case NEW: 1541 // constructor/method reference receiver 1542 case CONSTRUCTOR_REFERENCE: 1543 case METHOD_REFERENCE: 1544 position.offset = nextChar(); 1545 break; 1546 // local variable 1547 case LOCAL_VARIABLE: 1548 // resource variable 1549 case RESOURCE_VARIABLE: 1550 int table_length = nextChar(); 1551 position.lvarOffset = new int[table_length]; 1552 position.lvarLength = new int[table_length]; 1553 position.lvarIndex = new int[table_length]; 1554 1555 for (int i = 0; i < table_length; ++i) { 1556 position.lvarOffset[i] = nextChar(); 1557 position.lvarLength[i] = nextChar(); 1558 position.lvarIndex[i] = nextChar(); 1559 } 1560 break; 1561 // exception parameter 1562 case EXCEPTION_PARAMETER: 1563 position.exception_index = nextChar(); 1564 break; 1565 // method receiver 1566 case METHOD_RECEIVER: 1567 // Do nothing 1568 break; 1569 // type parameter 1570 case CLASS_TYPE_PARAMETER: 1571 case METHOD_TYPE_PARAMETER: 1572 position.parameter_index = nextByte(); 1573 break; 1574 // type parameter bound 1575 case CLASS_TYPE_PARAMETER_BOUND: 1576 case METHOD_TYPE_PARAMETER_BOUND: 1577 position.parameter_index = nextByte(); 1578 position.bound_index = nextByte(); 1579 break; 1580 // class extends or implements clause 1581 case CLASS_EXTENDS: 1582 position.type_index = nextChar(); 1583 break; 1584 // throws 1585 case THROWS: 1586 position.type_index = nextChar(); 1587 break; 1588 // method parameter 1589 case METHOD_FORMAL_PARAMETER: 1590 position.parameter_index = nextByte(); 1591 break; 1592 // type cast 1593 case CAST: 1594 // method/constructor/reference type argument 1595 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: 1596 case METHOD_INVOCATION_TYPE_ARGUMENT: 1597 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: 1598 case METHOD_REFERENCE_TYPE_ARGUMENT: 1599 position.offset = nextChar(); 1600 position.type_index = nextByte(); 1601 break; 1602 // We don't need to worry about these 1603 case METHOD_RETURN: 1604 case FIELD: 1605 break; 1606 case UNKNOWN: 1607 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1608 default: 1609 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position); 1610 } 1611 1612 { // See whether there is location info and read it 1613 int len = nextByte(); 1614 ListBuffer<Integer> loc = new ListBuffer<>(); 1615 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1616 loc = loc.append(nextByte()); 1617 position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1618 } 1619 1620 return position; 1621 } 1622 1623 Attribute readAttributeValue() { 1624 char c = (char) buf[bp++]; 1625 switch (c) { 1626 case 'B': 1627 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1628 case 'C': 1629 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1630 case 'D': 1631 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1632 case 'F': 1633 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1634 case 'I': 1635 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1636 case 'J': 1637 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1638 case 'S': 1639 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1640 case 'Z': 1641 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1642 case 's': 1643 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1644 case 'e': 1645 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1646 case 'c': 1647 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar())); 1648 case '[': { 1649 int n = nextChar(); 1650 ListBuffer<Attribute> l = new ListBuffer<Attribute>(); 1651 for (int i=0; i<n; i++) 1652 l.append(readAttributeValue()); 1653 return new ArrayAttributeProxy(l.toList()); 1654 } 1655 case '@': 1656 return readCompoundAnnotation(); 1657 default: 1658 throw new AssertionError("unknown annotation tag '" + c + "'"); 1659 } 1660 } 1661 1662 interface ProxyVisitor extends Attribute.Visitor { 1663 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1664 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1665 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1666 } 1667 1668 static class EnumAttributeProxy extends Attribute { 1669 Type enumType; 1670 Name enumerator; 1671 public EnumAttributeProxy(Type enumType, Name enumerator) { 1672 super(null); 1673 this.enumType = enumType; 1674 this.enumerator = enumerator; 1675 } 1676 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1677 @Override 1678 public String toString() { 1679 return "/*proxy enum*/" + enumType + "." + enumerator; 1680 } 1681 } 1682 1683 static class ArrayAttributeProxy extends Attribute { 1684 List<Attribute> values; 1685 ArrayAttributeProxy(List<Attribute> values) { 1686 super(null); 1687 this.values = values; 1688 } 1689 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1690 @Override 1691 public String toString() { 1692 return "{" + values + "}"; 1693 } 1694 } 1695 1696 /** A temporary proxy representing a compound attribute. 1697 */ 1698 static class CompoundAnnotationProxy extends Attribute { 1699 final List<Pair<Name,Attribute>> values; 1700 public CompoundAnnotationProxy(Type type, 1701 List<Pair<Name,Attribute>> values) { 1702 super(type); 1703 this.values = values; 1704 } 1705 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 1706 @Override 1707 public String toString() { 1708 StringBuilder buf = new StringBuilder(); 1709 buf.append("@"); 1710 buf.append(type.tsym.getQualifiedName()); 1711 buf.append("/*proxy*/{"); 1712 boolean first = true; 1713 for (List<Pair<Name,Attribute>> v = values; 1714 v.nonEmpty(); v = v.tail) { 1715 Pair<Name,Attribute> value = v.head; 1716 if (!first) buf.append(","); 1717 first = false; 1718 buf.append(value.fst); 1719 buf.append("="); 1720 buf.append(value.snd); 1721 } 1722 buf.append("}"); 1723 return buf.toString(); 1724 } 1725 } 1726 1727 /** A temporary proxy representing a type annotation. 1728 */ 1729 static class TypeAnnotationProxy { 1730 final CompoundAnnotationProxy compound; 1731 final TypeAnnotationPosition position; 1732 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 1733 TypeAnnotationPosition position) { 1734 this.compound = compound; 1735 this.position = position; 1736 } 1737 } 1738 1739 class AnnotationDeproxy implements ProxyVisitor { 1740 private ClassSymbol requestingOwner = currentOwner.kind == MTH 1741 ? currentOwner.enclClass() : (ClassSymbol)currentOwner; 1742 1743 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 1744 // also must fill in types!!!! 1745 ListBuffer<Attribute.Compound> buf = 1746 new ListBuffer<Attribute.Compound>(); 1747 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 1748 buf.append(deproxyCompound(l.head)); 1749 } 1750 return buf.toList(); 1751 } 1752 1753 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 1754 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = 1755 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>(); 1756 for (List<Pair<Name,Attribute>> l = a.values; 1757 l.nonEmpty(); 1758 l = l.tail) { 1759 MethodSymbol meth = findAccessMethod(a.type, l.head.fst); 1760 buf.append(new Pair<Symbol.MethodSymbol,Attribute> 1761 (meth, deproxy(meth.type.getReturnType(), l.head.snd))); 1762 } 1763 return new Attribute.Compound(a.type, buf.toList()); 1764 } 1765 1766 MethodSymbol findAccessMethod(Type container, Name name) { 1767 CompletionFailure failure = null; 1768 try { 1769 for (Scope.Entry e = container.tsym.members().lookup(name); 1770 e.scope != null; 1771 e = e.next()) { 1772 Symbol sym = e.sym; 1773 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 1774 return (MethodSymbol) sym; 1775 } 1776 } catch (CompletionFailure ex) { 1777 failure = ex; 1778 } 1779 // The method wasn't found: emit a warning and recover 1780 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 1781 try { 1782 if (lintClassfile) { 1783 if (failure == null) { 1784 log.warning("annotation.method.not.found", 1785 container, 1786 name); 1787 } else { 1788 log.warning("annotation.method.not.found.reason", 1789 container, 1790 name, 1791 failure.getDetailValue()); //diagnostic, if present 1792 } 1793 } 1794 } finally { 1795 log.useSource(prevSource); 1796 } 1797 // Construct a new method type and symbol. Use bottom 1798 // type (typeof null) as return type because this type is 1799 // a subtype of all reference types and can be converted 1800 // to primitive types by unboxing. 1801 MethodType mt = new MethodType(List.<Type>nil(), 1802 syms.botType, 1803 List.<Type>nil(), 1804 syms.methodClass); 1805 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 1806 } 1807 1808 Attribute result; 1809 Type type; 1810 Attribute deproxy(Type t, Attribute a) { 1811 Type oldType = type; 1812 try { 1813 type = t; 1814 a.accept(this); 1815 return result; 1816 } finally { 1817 type = oldType; 1818 } 1819 } 1820 1821 // implement Attribute.Visitor below 1822 1823 public void visitConstant(Attribute.Constant value) { 1824 // assert value.type == type; 1825 result = value; 1826 } 1827 1828 public void visitClass(Attribute.Class clazz) { 1829 result = clazz; 1830 } 1831 1832 public void visitEnum(Attribute.Enum e) { 1833 throw new AssertionError(); // shouldn't happen 1834 } 1835 1836 public void visitCompound(Attribute.Compound compound) { 1837 throw new AssertionError(); // shouldn't happen 1838 } 1839 1840 public void visitArray(Attribute.Array array) { 1841 throw new AssertionError(); // shouldn't happen 1842 } 1843 1844 public void visitError(Attribute.Error e) { 1845 throw new AssertionError(); // shouldn't happen 1846 } 1847 1848 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 1849 // type.tsym.flatName() should == proxy.enumFlatName 1850 TypeSymbol enumTypeSym = proxy.enumType.tsym; 1851 VarSymbol enumerator = null; 1852 CompletionFailure failure = null; 1853 try { 1854 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator); 1855 e.scope != null; 1856 e = e.next()) { 1857 if (e.sym.kind == VAR) { 1858 enumerator = (VarSymbol)e.sym; 1859 break; 1860 } 1861 } 1862 } 1863 catch (CompletionFailure ex) { 1864 failure = ex; 1865 } 1866 if (enumerator == null) { 1867 if (failure != null) { 1868 log.warning("unknown.enum.constant.reason", 1869 currentClassFile, enumTypeSym, proxy.enumerator, 1870 failure.getDiagnostic()); 1871 } else { 1872 log.warning("unknown.enum.constant", 1873 currentClassFile, enumTypeSym, proxy.enumerator); 1874 } 1875 result = new Attribute.Enum(enumTypeSym.type, 1876 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 1877 } else { 1878 result = new Attribute.Enum(enumTypeSym.type, enumerator); 1879 } 1880 } 1881 1882 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 1883 int length = proxy.values.length(); 1884 Attribute[] ats = new Attribute[length]; 1885 Type elemtype = types.elemtype(type); 1886 int i = 0; 1887 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 1888 ats[i++] = deproxy(elemtype, p.head); 1889 } 1890 result = new Attribute.Array(type, ats); 1891 } 1892 1893 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 1894 result = deproxyCompound(proxy); 1895 } 1896 } 1897 1898 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Worker { 1899 final MethodSymbol sym; 1900 final Attribute value; 1901 final JavaFileObject classFile = currentClassFile; 1902 @Override 1903 public String toString() { 1904 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 1905 } 1906 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 1907 this.sym = sym; 1908 this.value = value; 1909 } 1910 // implement Annotate.Worker.run() 1911 public void run() { 1912 JavaFileObject previousClassFile = currentClassFile; 1913 try { 1914 // Reset the interim value set earlier in 1915 // attachAnnotationDefault(). 1916 sym.defaultValue = null; 1917 currentClassFile = classFile; 1918 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 1919 } finally { 1920 currentClassFile = previousClassFile; 1921 } 1922 } 1923 } 1924 1925 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Worker { 1926 final Symbol sym; 1927 final List<CompoundAnnotationProxy> l; 1928 final JavaFileObject classFile; 1929 @Override 1930 public String toString() { 1931 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 1932 } 1933 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 1934 this.sym = sym; 1935 this.l = l; 1936 this.classFile = currentClassFile; 1937 } 1938 // implement Annotate.Worker.run() 1939 public void run() { 1940 JavaFileObject previousClassFile = currentClassFile; 1941 try { 1942 currentClassFile = classFile; 1943 List<Attribute.Compound> newList = deproxyCompoundList(l); 1944 if (sym.annotationsPendingCompletion()) { 1945 sym.setDeclarationAttributes(newList); 1946 } else { 1947 sym.appendAttributes(newList); 1948 } 1949 } finally { 1950 currentClassFile = previousClassFile; 1951 } 1952 } 1953 } 1954 1955 class TypeAnnotationCompleter extends AnnotationCompleter { 1956 1957 List<TypeAnnotationProxy> proxies; 1958 1959 TypeAnnotationCompleter(Symbol sym, 1960 List<TypeAnnotationProxy> proxies) { 1961 super(sym, List.<CompoundAnnotationProxy>nil()); 1962 this.proxies = proxies; 1963 } 1964 1965 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 1966 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 1967 for (TypeAnnotationProxy proxy: proxies) { 1968 Attribute.Compound compound = deproxyCompound(proxy.compound); 1969 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 1970 buf.add(typeCompound); 1971 } 1972 return buf.toList(); 1973 } 1974 1975 @Override 1976 public void run() { 1977 JavaFileObject previousClassFile = currentClassFile; 1978 try { 1979 currentClassFile = classFile; 1980 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 1981 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 1982 } finally { 1983 currentClassFile = previousClassFile; 1984 } 1985 } 1986 } 1987 1988 1989 /************************************************************************ 1990 * Reading Symbols 1991 ***********************************************************************/ 1992 1993 /** Read a field. 1994 */ 1995 VarSymbol readField() { 1996 long flags = adjustFieldFlags(nextChar()); 1997 Name name = readName(nextChar()); 1998 Type type = readType(nextChar()); 1999 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 2000 readMemberAttrs(v); 2001 return v; 2002 } 2003 2004 /** Read a method. 2005 */ 2006 MethodSymbol readMethod() { 2007 long flags = adjustMethodFlags(nextChar()); 2008 Name name = readName(nextChar()); 2009 Type type = readType(nextChar()); 2010 if (currentOwner.isInterface() && 2011 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 2012 if (majorVersion > Target.JDK1_8.majorVersion || 2013 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) { 2014 if ((flags & STATIC) == 0) { 2015 currentOwner.flags_field |= DEFAULT; 2016 flags |= DEFAULT | ABSTRACT; 2017 } 2018 } else { 2019 //protect against ill-formed classfiles 2020 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 2021 Integer.toString(majorVersion), 2022 Integer.toString(minorVersion)); 2023 } 2024 } 2025 if (name == names.init && currentOwner.hasOuterInstance()) { 2026 // Sometimes anonymous classes don't have an outer 2027 // instance, however, there is no reliable way to tell so 2028 // we never strip this$n 2029 if (!currentOwner.name.isEmpty()) 2030 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2031 type.getReturnType(), 2032 type.getThrownTypes(), 2033 syms.methodClass); 2034 } 2035 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2036 if (types.isSignaturePolymorphic(m)) { 2037 m.flags_field |= SIGNATURE_POLYMORPHIC; 2038 } 2039 if (saveParameterNames) 2040 initParameterNames(m); 2041 Symbol prevOwner = currentOwner; 2042 currentOwner = m; 2043 try { 2044 readMemberAttrs(m); 2045 } finally { 2046 currentOwner = prevOwner; 2047 } 2048 if (saveParameterNames) 2049 setParameterNames(m, type); 2050 return m; 2051 } 2052 2053 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2054 boolean isVarargs = (flags & VARARGS) != 0; 2055 if (isVarargs) { 2056 Type varargsElem = args.last(); 2057 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2058 for (Type t : args) { 2059 adjustedArgs.append(t != varargsElem ? 2060 t : 2061 ((ArrayType)t).makeVarargs()); 2062 } 2063 args = adjustedArgs.toList(); 2064 } 2065 return args.tail; 2066 } 2067 2068 /** 2069 * Init the parameter names array. 2070 * Parameter names are currently inferred from the names in the 2071 * LocalVariableTable attributes of a Code attribute. 2072 * (Note: this means parameter names are currently not available for 2073 * methods without a Code attribute.) 2074 * This method initializes an array in which to store the name indexes 2075 * of parameter names found in LocalVariableTable attributes. It is 2076 * slightly supersized to allow for additional slots with a start_pc of 0. 2077 */ 2078 void initParameterNames(MethodSymbol sym) { 2079 // make allowance for synthetic parameters. 2080 final int excessSlots = 4; 2081 int expectedParameterSlots = 2082 Code.width(sym.type.getParameterTypes()) + excessSlots; 2083 if (parameterNameIndices == null 2084 || parameterNameIndices.length < expectedParameterSlots) { 2085 parameterNameIndices = new int[expectedParameterSlots]; 2086 } else 2087 Arrays.fill(parameterNameIndices, 0); 2088 haveParameterNameIndices = false; 2089 sawMethodParameters = false; 2090 } 2091 2092 /** 2093 * Set the parameter names for a symbol from the name index in the 2094 * parameterNameIndicies array. The type of the symbol may have changed 2095 * while reading the method attributes (see the Signature attribute). 2096 * This may be because of generic information or because anonymous 2097 * synthetic parameters were added. The original type (as read from 2098 * the method descriptor) is used to help guess the existence of 2099 * anonymous synthetic parameters. 2100 * On completion, sym.savedParameter names will either be null (if 2101 * no parameter names were found in the class file) or will be set to a 2102 * list of names, one per entry in sym.type.getParameterTypes, with 2103 * any missing names represented by the empty name. 2104 */ 2105 void setParameterNames(MethodSymbol sym, Type jvmType) { 2106 // if no names were found in the class file, there's nothing more to do 2107 if (!haveParameterNameIndices) 2108 return; 2109 // If we get parameter names from MethodParameters, then we 2110 // don't need to skip. 2111 int firstParam = 0; 2112 if (!sawMethodParameters) { 2113 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2114 // the code in readMethod may have skipped the first 2115 // parameter when setting up the MethodType. If so, we 2116 // make a corresponding allowance here for the position of 2117 // the first parameter. Note that this assumes the 2118 // skipped parameter has a width of 1 -- i.e. it is not 2119 // a double width type (long or double.) 2120 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2121 // Sometimes anonymous classes don't have an outer 2122 // instance, however, there is no reliable way to tell so 2123 // we never strip this$n 2124 if (!currentOwner.name.isEmpty()) 2125 firstParam += 1; 2126 } 2127 2128 if (sym.type != jvmType) { 2129 // reading the method attributes has caused the 2130 // symbol's type to be changed. (i.e. the Signature 2131 // attribute.) This may happen if there are hidden 2132 // (synthetic) parameters in the descriptor, but not 2133 // in the Signature. The position of these hidden 2134 // parameters is unspecified; for now, assume they are 2135 // at the beginning, and so skip over them. The 2136 // primary case for this is two hidden parameters 2137 // passed into Enum constructors. 2138 int skip = Code.width(jvmType.getParameterTypes()) 2139 - Code.width(sym.type.getParameterTypes()); 2140 firstParam += skip; 2141 } 2142 } 2143 List<Name> paramNames = List.nil(); 2144 int index = firstParam; 2145 for (Type t: sym.type.getParameterTypes()) { 2146 int nameIdx = (index < parameterNameIndices.length 2147 ? parameterNameIndices[index] : 0); 2148 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2149 paramNames = paramNames.prepend(name); 2150 index += Code.width(t); 2151 } 2152 sym.savedParameterNames = paramNames.reverse(); 2153 } 2154 2155 /** 2156 * skip n bytes 2157 */ 2158 void skipBytes(int n) { 2159 bp = bp + n; 2160 } 2161 2162 /** Skip a field or method 2163 */ 2164 void skipMember() { 2165 bp = bp + 6; 2166 char ac = nextChar(); 2167 for (int i = 0; i < ac; i++) { 2168 bp = bp + 2; 2169 int attrLen = nextInt(); 2170 bp = bp + attrLen; 2171 } 2172 } 2173 2174 /** Enter type variables of this classtype and all enclosing ones in 2175 * `typevars'. 2176 */ 2177 protected void enterTypevars(Type t) { 2178 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS)) 2179 enterTypevars(t.getEnclosingType()); 2180 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) 2181 typevars.enter(xs.head.tsym); 2182 } 2183 2184 protected void enterTypevars(Symbol sym) { 2185 if (sym.owner.kind == MTH) { 2186 enterTypevars(sym.owner); 2187 enterTypevars(sym.owner.owner); 2188 } 2189 enterTypevars(sym.type); 2190 } 2191 2192 /** Read contents of a given class symbol `c'. Both external and internal 2193 * versions of an inner class are read. 2194 */ 2195 void readClass(ClassSymbol c) { 2196 ClassType ct = (ClassType)c.type; 2197 2198 // allocate scope for members 2199 c.members_field = new Scope(c); 2200 2201 // prepare type variable table 2202 typevars = typevars.dup(currentOwner); 2203 if (ct.getEnclosingType().hasTag(CLASS)) 2204 enterTypevars(ct.getEnclosingType()); 2205 2206 // read flags, or skip if this is an inner class 2207 long flags = adjustClassFlags(nextChar()); 2208 if (c.owner.kind == PCK) c.flags_field = flags; 2209 2210 // read own class name and check that it matches 2211 ClassSymbol self = readClassSymbol(nextChar()); 2212 if (c != self) 2213 throw badClassFile("class.file.wrong.class", 2214 self.flatname); 2215 2216 // class attributes must be read before class 2217 // skip ahead to read class attributes 2218 int startbp = bp; 2219 nextChar(); 2220 char interfaceCount = nextChar(); 2221 bp += interfaceCount * 2; 2222 char fieldCount = nextChar(); 2223 for (int i = 0; i < fieldCount; i++) skipMember(); 2224 char methodCount = nextChar(); 2225 for (int i = 0; i < methodCount; i++) skipMember(); 2226 readClassAttrs(c); 2227 2228 if (readAllOfClassFile) { 2229 for (int i = 1; i < poolObj.length; i++) readPool(i); 2230 c.pool = new Pool(poolObj.length, poolObj, types); 2231 } 2232 2233 // reset and read rest of classinfo 2234 bp = startbp; 2235 int n = nextChar(); 2236 if (ct.supertype_field == null) 2237 ct.supertype_field = (n == 0) 2238 ? Type.noType 2239 : readClassSymbol(n).erasure(types); 2240 n = nextChar(); 2241 List<Type> is = List.nil(); 2242 for (int i = 0; i < n; i++) { 2243 Type _inter = readClassSymbol(nextChar()).erasure(types); 2244 is = is.prepend(_inter); 2245 } 2246 if (ct.interfaces_field == null) 2247 ct.interfaces_field = is.reverse(); 2248 2249 Assert.check(fieldCount == nextChar()); 2250 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2251 Assert.check(methodCount == nextChar()); 2252 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2253 2254 typevars = typevars.leave(); 2255 } 2256 2257 /** Read inner class info. For each inner/outer pair allocate a 2258 * member class. 2259 */ 2260 void readInnerClasses(ClassSymbol c) { 2261 int n = nextChar(); 2262 for (int i = 0; i < n; i++) { 2263 nextChar(); // skip inner class symbol 2264 ClassSymbol outer = readClassSymbol(nextChar()); 2265 Name name = readName(nextChar()); 2266 if (name == null) name = names.empty; 2267 long flags = adjustClassFlags(nextChar()); 2268 if (outer != null) { // we have a member class 2269 if (name == names.empty) 2270 name = names.one; 2271 ClassSymbol member = enterClass(name, outer); 2272 if ((flags & STATIC) == 0) { 2273 ((ClassType)member.type).setEnclosingType(outer.type); 2274 if (member.erasure_field != null) 2275 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2276 } 2277 if (c == outer) { 2278 member.flags_field = flags; 2279 enterMember(c, member); 2280 } 2281 } 2282 } 2283 } 2284 2285 /** Read a class file. 2286 */ 2287 private void readClassFile(ClassSymbol c) throws IOException { 2288 int magic = nextInt(); 2289 if (magic != JAVA_MAGIC) 2290 throw badClassFile("illegal.start.of.class.file"); 2291 2292 minorVersion = nextChar(); 2293 majorVersion = nextChar(); 2294 int maxMajor = Target.MAX().majorVersion; 2295 int maxMinor = Target.MAX().minorVersion; 2296 if (majorVersion > maxMajor || 2297 majorVersion * 1000 + minorVersion < 2298 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion) 2299 { 2300 if (majorVersion == (maxMajor + 1)) 2301 log.warning("big.major.version", 2302 currentClassFile, 2303 majorVersion, 2304 maxMajor); 2305 else 2306 throw badClassFile("wrong.version", 2307 Integer.toString(majorVersion), 2308 Integer.toString(minorVersion), 2309 Integer.toString(maxMajor), 2310 Integer.toString(maxMinor)); 2311 } 2312 else if (checkClassFile && 2313 majorVersion == maxMajor && 2314 minorVersion > maxMinor) 2315 { 2316 printCCF("found.later.version", 2317 Integer.toString(minorVersion)); 2318 } 2319 indexPool(); 2320 if (signatureBuffer.length < bp) { 2321 int ns = Integer.highestOneBit(bp) << 1; 2322 signatureBuffer = new byte[ns]; 2323 } 2324 readClass(c); 2325 } 2326 2327 /************************************************************************ 2328 * Adjusting flags 2329 ***********************************************************************/ 2330 2331 long adjustFieldFlags(long flags) { 2332 return flags; 2333 } 2334 long adjustMethodFlags(long flags) { 2335 if ((flags & ACC_BRIDGE) != 0) { 2336 flags &= ~ACC_BRIDGE; 2337 flags |= BRIDGE; 2338 if (!allowGenerics) 2339 flags &= ~SYNTHETIC; 2340 } 2341 if ((flags & ACC_VARARGS) != 0) { 2342 flags &= ~ACC_VARARGS; 2343 flags |= VARARGS; 2344 } 2345 return flags; 2346 } 2347 long adjustClassFlags(long flags) { 2348 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded 2349 } 2350 2351 /************************************************************************ 2352 * Loading Classes 2353 ***********************************************************************/ 2354 2355 /** Define a new class given its name and owner. 2356 */ 2357 public ClassSymbol defineClass(Name name, Symbol owner) { 2358 ClassSymbol c = new ClassSymbol(0, name, owner); 2359 if (owner.kind == PCK) 2360 Assert.checkNull(classes.get(c.flatname), c); 2361 c.completer = thisCompleter; 2362 return c; 2363 } 2364 2365 /** Create a new toplevel or member class symbol with given name 2366 * and owner and enter in `classes' unless already there. 2367 */ 2368 public ClassSymbol enterClass(Name name, TypeSymbol owner) { 2369 Name flatname = TypeSymbol.formFlatName(name, owner); 2370 ClassSymbol c = classes.get(flatname); 2371 if (c == null) { 2372 c = defineClass(name, owner); 2373 classes.put(flatname, c); 2374 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) { 2375 // reassign fields of classes that might have been loaded with 2376 // their flat names. 2377 c.owner.members().remove(c); 2378 c.name = name; 2379 c.owner = owner; 2380 c.fullname = ClassSymbol.formFullName(name, owner); 2381 } 2382 return c; 2383 } 2384 2385 /** 2386 * Creates a new toplevel class symbol with given flat name and 2387 * given class (or source) file. 2388 * 2389 * @param flatName a fully qualified binary class name 2390 * @param classFile the class file or compilation unit defining 2391 * the class (may be {@code null}) 2392 * @return a newly created class symbol 2393 * @throws AssertionError if the class symbol already exists 2394 */ 2395 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) { 2396 ClassSymbol cs = classes.get(flatName); 2397 if (cs != null) { 2398 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s", 2399 cs.fullname, 2400 cs.completer, 2401 cs.classfile, 2402 cs.sourcefile); 2403 throw new AssertionError(msg); 2404 } 2405 Name packageName = Convert.packagePart(flatName); 2406 PackageSymbol owner = packageName.isEmpty() 2407 ? syms.unnamedPackage 2408 : enterPackage(packageName); 2409 cs = defineClass(Convert.shortName(flatName), owner); 2410 cs.classfile = classFile; 2411 classes.put(flatName, cs); 2412 return cs; 2413 } 2414 2415 /** Create a new member or toplevel class symbol with given flat name 2416 * and enter in `classes' unless already there. 2417 */ 2418 public ClassSymbol enterClass(Name flatname) { 2419 ClassSymbol c = classes.get(flatname); 2420 if (c == null) 2421 return enterClass(flatname, (JavaFileObject)null); 2422 else 2423 return c; 2424 } 2425 2426 /** Completion for classes to be loaded. Before a class is loaded 2427 * we make sure its enclosing class (if any) is loaded. 2428 */ 2429 private void complete(Symbol sym) throws CompletionFailure { 2430 if (sym.kind == TYP) { 2431 ClassSymbol c = (ClassSymbol)sym; 2432 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined 2433 annotate.enterStart(); 2434 try { 2435 completeOwners(c.owner); 2436 completeEnclosing(c); 2437 } finally { 2438 // The flush needs to happen only after annotations 2439 // are filled in. 2440 annotate.enterDoneWithoutFlush(); 2441 } 2442 fillIn(c); 2443 } else if (sym.kind == PCK) { 2444 PackageSymbol p = (PackageSymbol)sym; 2445 try { 2446 fillIn(p); 2447 } catch (IOException ex) { 2448 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex); 2449 } 2450 } 2451 if (!filling) 2452 annotate.flush(); // finish attaching annotations 2453 } 2454 2455 /** complete up through the enclosing package. */ 2456 private void completeOwners(Symbol o) { 2457 if (o.kind != PCK) completeOwners(o.owner); 2458 o.complete(); 2459 } 2460 2461 /** 2462 * Tries to complete lexically enclosing classes if c looks like a 2463 * nested class. This is similar to completeOwners but handles 2464 * the situation when a nested class is accessed directly as it is 2465 * possible with the Tree API or javax.lang.model.*. 2466 */ 2467 private void completeEnclosing(ClassSymbol c) { 2468 if (c.owner.kind == PCK) { 2469 Symbol owner = c.owner; 2470 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) { 2471 Symbol encl = owner.members().lookup(name).sym; 2472 if (encl == null) 2473 encl = classes.get(TypeSymbol.formFlatName(name, owner)); 2474 if (encl != null) 2475 encl.complete(); 2476 } 2477 } 2478 } 2479 2480 /** We can only read a single class file at a time; this 2481 * flag keeps track of when we are currently reading a class 2482 * file. 2483 */ 2484 private boolean filling = false; 2485 2486 /** Fill in definition of class `c' from corresponding class or 2487 * source file. 2488 */ 2489 private void fillIn(ClassSymbol c) { 2490 if (completionFailureName == c.fullname) { 2491 throw new CompletionFailure(c, "user-selected completion failure by class name"); 2492 } 2493 currentOwner = c; 2494 warnedAttrs.clear(); 2495 JavaFileObject classfile = c.classfile; 2496 if (classfile != null) { 2497 JavaFileObject previousClassFile = currentClassFile; 2498 try { 2499 if (filling) { 2500 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile); 2501 } 2502 currentClassFile = classfile; 2503 if (verbose) { 2504 log.printVerbose("loading", currentClassFile.toString()); 2505 } 2506 if (classfile.getKind() == JavaFileObject.Kind.CLASS) { 2507 filling = true; 2508 try { 2509 bp = 0; 2510 buf = readInputStream(buf, classfile.openInputStream()); 2511 readClassFile(c); 2512 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 2513 List<Type> missing = missingTypeVariables; 2514 List<Type> found = foundTypeVariables; 2515 missingTypeVariables = List.nil(); 2516 foundTypeVariables = List.nil(); 2517 filling = false; 2518 ClassType ct = (ClassType)currentOwner.type; 2519 ct.supertype_field = 2520 types.subst(ct.supertype_field, missing, found); 2521 ct.interfaces_field = 2522 types.subst(ct.interfaces_field, missing, found); 2523 } else if (missingTypeVariables.isEmpty() != 2524 foundTypeVariables.isEmpty()) { 2525 Name name = missingTypeVariables.head.tsym.name; 2526 throw badClassFile("undecl.type.var", name); 2527 } 2528 } finally { 2529 missingTypeVariables = List.nil(); 2530 foundTypeVariables = List.nil(); 2531 filling = false; 2532 } 2533 } else { 2534 if (sourceCompleter != null) { 2535 sourceCompleter.complete(c); 2536 } else { 2537 throw new IllegalStateException("Source completer required to read " 2538 + classfile.toUri()); 2539 } 2540 } 2541 return; 2542 } catch (IOException ex) { 2543 throw badClassFile("unable.to.access.file", ex.getMessage()); 2544 } finally { 2545 currentClassFile = previousClassFile; 2546 } 2547 } else { 2548 JCDiagnostic diag = 2549 diagFactory.fragment("class.file.not.found", c.flatname); 2550 throw 2551 newCompletionFailure(c, diag); 2552 } 2553 } 2554 // where 2555 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { 2556 try { 2557 buf = ensureCapacity(buf, s.available()); 2558 int r = s.read(buf); 2559 int bp = 0; 2560 while (r != -1) { 2561 bp += r; 2562 buf = ensureCapacity(buf, bp); 2563 r = s.read(buf, bp, buf.length - bp); 2564 } 2565 return buf; 2566 } finally { 2567 try { 2568 s.close(); 2569 } catch (IOException e) { 2570 /* Ignore any errors, as this stream may have already 2571 * thrown a related exception which is the one that 2572 * should be reported. 2573 */ 2574 } 2575 } 2576 } 2577 /* 2578 * ensureCapacity will increase the buffer as needed, taking note that 2579 * the new buffer will always be greater than the needed and never 2580 * exactly equal to the needed size or bp. If equal then the read (above) 2581 * will infinitely loop as buf.length - bp == 0. 2582 */ 2583 private static byte[] ensureCapacity(byte[] buf, int needed) { 2584 if (buf.length <= needed) { 2585 byte[] old = buf; 2586 buf = new byte[Integer.highestOneBit(needed) << 1]; 2587 System.arraycopy(old, 0, buf, 0, old.length); 2588 } 2589 return buf; 2590 } 2591 /** Static factory for CompletionFailure objects. 2592 * In practice, only one can be used at a time, so we share one 2593 * to reduce the expense of allocating new exception objects. 2594 */ 2595 private CompletionFailure newCompletionFailure(TypeSymbol c, 2596 JCDiagnostic diag) { 2597 if (!cacheCompletionFailure) { 2598 // log.warning("proc.messager", 2599 // Log.getLocalizedString("class.file.not.found", c.flatname)); 2600 // c.debug.printStackTrace(); 2601 return new CompletionFailure(c, diag); 2602 } else { 2603 CompletionFailure result = cachedCompletionFailure; 2604 result.sym = c; 2605 result.diag = diag; 2606 return result; 2607 } 2608 } 2609 private CompletionFailure cachedCompletionFailure = 2610 new CompletionFailure(null, (JCDiagnostic) null); 2611 { 2612 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]); 2613 } 2614 2615 /** Load a toplevel class with given fully qualified name 2616 * The class is entered into `classes' only if load was successful. 2617 */ 2618 public ClassSymbol loadClass(Name flatname) throws CompletionFailure { 2619 boolean absent = classes.get(flatname) == null; 2620 ClassSymbol c = enterClass(flatname); 2621 if (c.members_field == null && c.completer != null) { 2622 try { 2623 c.complete(); 2624 } catch (CompletionFailure ex) { 2625 if (absent) classes.remove(flatname); 2626 throw ex; 2627 } 2628 } 2629 return c; 2630 } 2631 2632 /************************************************************************ 2633 * Loading Packages 2634 ***********************************************************************/ 2635 2636 /** Check to see if a package exists, given its fully qualified name. 2637 */ 2638 public boolean packageExists(Name fullname) { 2639 return enterPackage(fullname).exists(); 2640 } 2641 2642 /** Make a package, given its fully qualified name. 2643 */ 2644 public PackageSymbol enterPackage(Name fullname) { 2645 PackageSymbol p = packages.get(fullname); 2646 if (p == null) { 2647 Assert.check(!fullname.isEmpty(), "rootPackage missing!"); 2648 p = new PackageSymbol( 2649 Convert.shortName(fullname), 2650 enterPackage(Convert.packagePart(fullname))); 2651 p.completer = thisCompleter; 2652 packages.put(fullname, p); 2653 } 2654 return p; 2655 } 2656 2657 /** Make a package, given its unqualified name and enclosing package. 2658 */ 2659 public PackageSymbol enterPackage(Name name, PackageSymbol owner) { 2660 return enterPackage(TypeSymbol.formFullName(name, owner)); 2661 } 2662 2663 /** Include class corresponding to given class file in package, 2664 * unless (1) we already have one the same kind (.class or .java), or 2665 * (2) we have one of the other kind, and the given class file 2666 * is older. 2667 */ 2668 protected void includeClassFile(PackageSymbol p, JavaFileObject file) { 2669 if ((p.flags_field & EXISTS) == 0) 2670 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner) 2671 q.flags_field |= EXISTS; 2672 JavaFileObject.Kind kind = file.getKind(); 2673 int seen; 2674 if (kind == JavaFileObject.Kind.CLASS) 2675 seen = CLASS_SEEN; 2676 else 2677 seen = SOURCE_SEEN; 2678 String binaryName = fileManager.inferBinaryName(currentLoc, file); 2679 int lastDot = binaryName.lastIndexOf("."); 2680 Name classname = names.fromString(binaryName.substring(lastDot + 1)); 2681 boolean isPkgInfo = classname == names.package_info; 2682 ClassSymbol c = isPkgInfo 2683 ? p.package_info 2684 : (ClassSymbol) p.members_field.lookup(classname).sym; 2685 if (c == null) { 2686 c = enterClass(classname, p); 2687 if (c.classfile == null) // only update the file if's it's newly created 2688 c.classfile = file; 2689 if (isPkgInfo) { 2690 p.package_info = c; 2691 } else { 2692 if (c.owner == p) // it might be an inner class 2693 p.members_field.enter(c); 2694 } 2695 } else if (c.classfile != null && (c.flags_field & seen) == 0) { 2696 // if c.classfile == null, we are currently compiling this class 2697 // and no further action is necessary. 2698 // if (c.flags_field & seen) != 0, we have already encountered 2699 // a file of the same kind; again no further action is necessary. 2700 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0) 2701 c.classfile = preferredFileObject(file, c.classfile); 2702 } 2703 c.flags_field |= seen; 2704 } 2705 2706 /** Implement policy to choose to derive information from a source 2707 * file or a class file when both are present. May be overridden 2708 * by subclasses. 2709 */ 2710 protected JavaFileObject preferredFileObject(JavaFileObject a, 2711 JavaFileObject b) { 2712 2713 if (preferSource) 2714 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b; 2715 else { 2716 long adate = a.getLastModified(); 2717 long bdate = b.getLastModified(); 2718 // 6449326: policy for bad lastModifiedTime in ClassReader 2719 //assert adate >= 0 && bdate >= 0; 2720 return (adate > bdate) ? a : b; 2721 } 2722 } 2723 2724 /** 2725 * specifies types of files to be read when filling in a package symbol 2726 */ 2727 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() { 2728 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE); 2729 } 2730 2731 /** 2732 * this is used to support javadoc 2733 */ 2734 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) { 2735 } 2736 2737 protected Location currentLoc; // FIXME 2738 2739 private boolean verbosePath = true; 2740 2741 /** Load directory of package into members scope. 2742 */ 2743 private void fillIn(PackageSymbol p) throws IOException { 2744 if (p.members_field == null) p.members_field = new Scope(p); 2745 String packageName = p.fullname.toString(); 2746 2747 Set<JavaFileObject.Kind> kinds = getPackageFileKinds(); 2748 2749 fillIn(p, PLATFORM_CLASS_PATH, 2750 fileManager.list(PLATFORM_CLASS_PATH, 2751 packageName, 2752 EnumSet.of(JavaFileObject.Kind.CLASS), 2753 false)); 2754 2755 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds); 2756 classKinds.remove(JavaFileObject.Kind.SOURCE); 2757 boolean wantClassFiles = !classKinds.isEmpty(); 2758 2759 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds); 2760 sourceKinds.remove(JavaFileObject.Kind.CLASS); 2761 boolean wantSourceFiles = !sourceKinds.isEmpty(); 2762 2763 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH); 2764 2765 if (verbose && verbosePath) { 2766 if (fileManager instanceof StandardJavaFileManager) { 2767 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager; 2768 if (haveSourcePath && wantSourceFiles) { 2769 List<File> path = List.nil(); 2770 for (File file : fm.getLocation(SOURCE_PATH)) { 2771 path = path.prepend(file); 2772 } 2773 log.printVerbose("sourcepath", path.reverse().toString()); 2774 } else if (wantSourceFiles) { 2775 List<File> path = List.nil(); 2776 for (File file : fm.getLocation(CLASS_PATH)) { 2777 path = path.prepend(file); 2778 } 2779 log.printVerbose("sourcepath", path.reverse().toString()); 2780 } 2781 if (wantClassFiles) { 2782 List<File> path = List.nil(); 2783 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) { 2784 path = path.prepend(file); 2785 } 2786 for (File file : fm.getLocation(CLASS_PATH)) { 2787 path = path.prepend(file); 2788 } 2789 log.printVerbose("classpath", path.reverse().toString()); 2790 } 2791 } 2792 } 2793 2794 if (wantSourceFiles && !haveSourcePath) { 2795 fillIn(p, CLASS_PATH, 2796 fileManager.list(CLASS_PATH, 2797 packageName, 2798 kinds, 2799 false)); 2800 } else { 2801 if (wantClassFiles) 2802 fillIn(p, CLASS_PATH, 2803 fileManager.list(CLASS_PATH, 2804 packageName, 2805 classKinds, 2806 false)); 2807 if (wantSourceFiles) 2808 fillIn(p, SOURCE_PATH, 2809 fileManager.list(SOURCE_PATH, 2810 packageName, 2811 sourceKinds, 2812 false)); 2813 } 2814 verbosePath = false; 2815 } 2816 // where 2817 private void fillIn(PackageSymbol p, 2818 Location location, 2819 Iterable<JavaFileObject> files) 2820 { 2821 currentLoc = location; 2822 for (JavaFileObject fo : files) { 2823 switch (fo.getKind()) { 2824 case CLASS: 2825 case SOURCE: { 2826 // TODO pass binaryName to includeClassFile 2827 String binaryName = fileManager.inferBinaryName(currentLoc, fo); 2828 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1); 2829 if (SourceVersion.isIdentifier(simpleName) || 2830 simpleName.equals("package-info")) 2831 includeClassFile(p, fo); 2832 break; 2833 } 2834 default: 2835 extraFileActions(p, fo); 2836 } 2837 } 2838 } 2839 2840 /** Output for "-checkclassfile" option. 2841 * @param key The key to look up the correct internationalized string. 2842 * @param arg An argument for substitution into the output string. 2843 */ 2844 private void printCCF(String key, Object arg) { 2845 log.printLines(key, arg); 2846 } 2847 2848 2849 public interface SourceCompleter { 2850 void complete(ClassSymbol sym) 2851 throws CompletionFailure; 2852 } 2853 2854 /** 2855 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 2856 * The attribute is only the last component of the original filename, so is unlikely 2857 * to be valid as is, so operations other than those to access the name throw 2858 * UnsupportedOperationException 2859 */ 2860 private static class SourceFileObject extends BaseFileObject { 2861 2862 /** The file's name. 2863 */ 2864 private Name name; 2865 private Name flatname; 2866 2867 public SourceFileObject(Name name, Name flatname) { 2868 super(null); // no file manager; never referenced for this file object 2869 this.name = name; 2870 this.flatname = flatname; 2871 } 2872 2873 @Override 2874 public URI toUri() { 2875 try { 2876 return new URI(null, name.toString(), null); 2877 } catch (URISyntaxException e) { 2878 throw new CannotCreateUriError(name.toString(), e); 2879 } 2880 } 2881 2882 @Override 2883 public String getName() { 2884 return name.toString(); 2885 } 2886 2887 @Override 2888 public String getShortName() { 2889 return getName(); 2890 } 2891 2892 @Override 2893 public JavaFileObject.Kind getKind() { 2894 return getKind(getName()); 2895 } 2896 2897 @Override 2898 public InputStream openInputStream() { 2899 throw new UnsupportedOperationException(); 2900 } 2901 2902 @Override 2903 public OutputStream openOutputStream() { 2904 throw new UnsupportedOperationException(); 2905 } 2906 2907 @Override 2908 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 2909 throw new UnsupportedOperationException(); 2910 } 2911 2912 @Override 2913 public Reader openReader(boolean ignoreEncodingErrors) { 2914 throw new UnsupportedOperationException(); 2915 } 2916 2917 @Override 2918 public Writer openWriter() { 2919 throw new UnsupportedOperationException(); 2920 } 2921 2922 @Override 2923 public long getLastModified() { 2924 throw new UnsupportedOperationException(); 2925 } 2926 2927 @Override 2928 public boolean delete() { 2929 throw new UnsupportedOperationException(); 2930 } 2931 2932 @Override 2933 protected String inferBinaryName(Iterable<? extends File> path) { 2934 return flatname.toString(); 2935 } 2936 2937 @Override 2938 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 2939 return true; // fail-safe mode 2940 } 2941 2942 /** 2943 * Check if two file objects are equal. 2944 * SourceFileObjects are just placeholder objects for the value of a 2945 * SourceFile attribute, and do not directly represent specific files. 2946 * Two SourceFileObjects are equal if their names are equal. 2947 */ 2948 @Override 2949 public boolean equals(Object other) { 2950 if (this == other) 2951 return true; 2952 2953 if (!(other instanceof SourceFileObject)) 2954 return false; 2955 2956 SourceFileObject o = (SourceFileObject) other; 2957 return name.equals(o.name); 2958 } 2959 2960 @Override 2961 public int hashCode() { 2962 return name.hashCode(); 2963 } 2964 } 2965 }