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