ClassReader.java revision 2674:e284f560acf6
1168054Sflz/* 2168054Sflz * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 3168266Sgabor * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4168266Sgabor * 5168266Sgabor * This code is free software; you can redistribute it and/or modify it 6168266Sgabor * under the terms of the GNU General Public License version 2 only, as 7168266Sgabor * published by the Free Software Foundation. Oracle designates this 8168266Sgabor * particular file as subject to the "Classpath" exception as provided 9168266Sgabor * by Oracle in the LICENSE file that accompanied this code. 10168266Sgabor * 11168054Sflz * This code is distributed in the hope that it will be useful, but WITHOUT 12168054Sflz * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13168064Sflz * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14168064Sflz * version 2 for more details (a copy is included in the LICENSE file that 15168064Sflz * accompanied this code). 16168064Sflz * 17168064Sflz * You should have received a copy of the GNU General Public License version 18168064Sflz * 2 along with this work; if not, write to the Free Software Foundation, 19168064Sflz * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20168064Sflz * 21168064Sflz * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22168064Sflz * or visit www.oracle.com if you need additional information or have any 23168064Sflz * questions. 24168064Sflz */ 25168064Sflz 26168064Sflzpackage com.sun.tools.javac.jvm; 27168054Sflz 28168054Sflzimport java.io.*; 29168064Sflzimport java.net.URI; 30168054Sflzimport java.net.URISyntaxException; 31168064Sflzimport java.nio.CharBuffer; 32168939Stmclaughimport java.nio.file.Path; 33168131Sbmahimport java.util.Arrays; 34168113Smarcusimport java.util.EnumSet; 35168123Snetchildimport java.util.HashMap; 36168939Stmclaughimport java.util.HashSet; 37168064Sflzimport java.util.Map; 38168054Sflzimport java.util.Set; 39168054Sflz 40168054Sflzimport javax.tools.JavaFileManager; 41168054Sflzimport javax.tools.JavaFileObject; 42168261Sache 43168077Sflzimport com.sun.tools.javac.code.*; 44168077Sflzimport com.sun.tools.javac.code.Lint.LintCategory; 45168126Saleimport com.sun.tools.javac.code.Scope.WriteableScope; 46168069Sgargaimport com.sun.tools.javac.code.Symbol.*; 47168472Snovelimport com.sun.tools.javac.code.Symtab; 48168274Ssemimport com.sun.tools.javac.code.Type.*; 49169073Saraujoimport com.sun.tools.javac.comp.Annotate; 50168667Sstefanimport com.sun.tools.javac.file.BaseFileObject; 51168274Ssemimport com.sun.tools.javac.jvm.ClassFile.NameAndType; 52168113Smarcusimport com.sun.tools.javac.jvm.ClassFile.Version; 53168098Skrionimport com.sun.tools.javac.util.*; 54168123Snetchildimport com.sun.tools.javac.util.DefinedBy.Api; 55168082Sgargaimport com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 56168116Sclsung 57168937Scpercivaimport static com.sun.tools.javac.code.Flags.*; 58168177Sgaborimport static com.sun.tools.javac.code.Kinds.Kind.*; 59168354Sdanfeimport static com.sun.tools.javac.code.TypeTag.CLASS; 60168072Sehauptimport static com.sun.tools.javac.code.TypeTag.TYPEVAR; 61168108Srafanimport static com.sun.tools.javac.jvm.ClassFile.*; 62168186Smatimport static com.sun.tools.javac.jvm.ClassFile.Version.*; 63168210Sitetcu 64168068Serwinimport static com.sun.tools.javac.main.Option.*; 65168072Sehaupt 66168113Smarcus/** This class provides operations to read a classfile into an internal 67168059Sgabor * representation. The internal representation is anchored in a 68168542Smiwi * ClassSymbol which contains in its scope symbol representations 69168098Skrion * for all other definitions in the classfile. Top-level Classes themselves 70168054Sflz * appear as members of the scopes of PackageSymbols. 71168059Sgabor * 72168054Sflz * <p><b>This is NOT part of any supported API. 73168256Sijliao * If you write code that depends on this, you do so at your own risk. 74168209Sitetcu * This code and its internal interfaces are subject to change or 75168076Sjmelo * deletion without notice.</b> 76168123Snetchild */ 77168054Sflzpublic class ClassReader { 78168055Spav /** The context key for the class reader. */ 79168055Spav protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>(); 80168536Skevlo 81168177Sgabor public static final int INITIAL_BUFFER_SIZE = 0x0fff0; 82168098Skrion 83168055Spav Annotate annotate; 84168161Sphilip 85168054Sflz /** Switch: verbose output. 86168208Sitetcu */ 87168295Sleeym boolean verbose; 88168295Sleeym 89168939Stmclaugh /** Switch: check class file for correct minor version, unrecognized 90168068Serwin * attributes. 91168337Slwhsu */ 92168177Sgabor boolean checkClassFile; 93168113Smarcus 94168918Sbrueffer /** Switch: read constant pool and code sections. This switch is initially 95168186Smat * set to false but can be turned on from outside. 96168055Spav */ 97168098Skrion public boolean readAllOfClassFile = false; 98168359Smm 99168100Smnag /** Switch: allow simplified varargs. 100169036Snemoliu */ 101168123Snetchild boolean allowSimplifiedVarargs; 102168177Sgabor 103168134Snork /** Lint option: warn about classfile issues 104168084Sehaupt */ 105168542Smiwi boolean lintClassfile; 106168939Stmclaugh 107168054Sflz /** Switch: preserve parameter names from the variable table. 108168098Skrion */ 109168108Srafan public boolean saveParameterNames; 110168098Skrion 111168098Skrion /** 112168098Skrion * The currently selected profile. 113168055Spav */ 114168068Serwin public final Profile profile; 115168939Stmclaugh 116168290Ssem /** The log to use for verbose output 117168667Sstefan */ 118168125Stdb final Log log; 119169018Strasz 120168225Strhodes /** The symbol table. */ 121168186Smat Symtab syms; 122168061Sahze 123168069Sgarga Types types; 124168935Stmclaugh 125168054Sflz /** The name table. */ 126168054Sflz final Names names; 127168064Sflz 128168064Sflz /** Access to files 129168054Sflz */ 130168055Spav private final JavaFileManager fileManager; 131168055Spav 132168055Spav /** Factory for diagnostics 133168055Spav */ 134168055Spav JCDiagnostic.Factory diagFactory; 135168055Spav 136168057Sahze /** The current scope where type variables are entered. 137168055Spav */ 138168919Sbrueffer protected WriteableScope typevars; 139168667Sstefan 140168667Sstefan /** The path name of the class file currently being read. 141168939Stmclaugh */ 142168939Stmclaugh protected JavaFileObject currentClassFile = null; 143168939Stmclaugh 144168125Stdb /** The class or method currently being read. 145168208Sitetcu */ 146168125Stdb protected Symbol currentOwner = null; 147168337Slwhsu 148168337Slwhsu /** The buffer containing the currently read class file. 149169036Snemoliu */ 150168108Srafan byte[] buf = new byte[INITIAL_BUFFER_SIZE]; 151168108Srafan 152168186Smat /** The current input pointer. 153168186Smat */ 154168938Scperciva protected int bp; 155168068Serwin 156168068Serwin /** The objects of the constant pool. 157168072Sehaupt */ 158168072Sehaupt Object[] poolObj; 159168274Ssem 160168225Strhodes /** For every constant pool entry, an index into buf where the 161168225Strhodes * defining section of the entry is found. 162168068Serwin */ 163168059Sgabor int[] poolIdx; 164168068Serwin 165168068Serwin /** The major version number of the class file being read. */ 166168068Serwin int majorVersion; 167168059Sgabor /** The minor version number of the class file being read. */ 168168354Sdanfe int minorVersion; 169168098Skrion 170168098Skrion /** A table to hold the constant pool indices for method parameter 171168054Sflz * names, as given in LocalVariableTable attributes. 172168054Sflz */ 173168054Sflz int[] parameterNameIndices; 174168054Sflz 175168069Sgarga /** 176168069Sgarga * Whether or not any parameter names have been found. 177168359Smm */ 178168069Sgarga boolean haveParameterNameIndices; 179168935Stmclaugh 180168069Sgarga /** Set this to false every time we start reading a method 181168295Sleeym * and are saving parameter names. Set it to true when we see 182168295Sleeym * MethodParameters, if it's set when we see a LocalVariableTable, 183169073Saraujo * then we ignore the parameter names from the LVT. 184168210Sitetcu */ 185168210Sitetcu boolean sawMethodParameters; 186168123Snetchild 187168123Snetchild /** 188168134Snork * The set of attribute names for which warnings have been generated for the current class 189168134Snork */ 190168134Snork Set<Name> warnedAttrs = new HashSet<>(); 191168134Snork 192168134Snork /** Get the ClassReader instance for this invocation. */ 193168098Skrion public static ClassReader instance(Context context) { 194168098Skrion ClassReader instance = context.get(classReaderKey); 195168098Skrion if (instance == null) 196168098Skrion instance = new ClassReader(context); 197168098Skrion return instance; 198168098Skrion } 199168098Skrion 200168098Skrion /** Construct a new class reader. */ 201168209Sitetcu protected ClassReader(Context context) { 202168209Sitetcu context.put(classReaderKey, this); 203168295Sleeym names = Names.instance(context); 204168295Sleeym syms = Symtab.instance(context); 205168939Stmclaugh types = Types.instance(context); 206168939Stmclaugh fileManager = context.get(JavaFileManager.class); 207168687Sahze if (fileManager == null) 208168113Smarcus throw new AssertionError("FileManager initialization error"); 209168113Smarcus diagFactory = JCDiagnostic.Factory.instance(context); 210168113Smarcus 211168113Smarcus log = Log.instance(context); 212168186Smat 213168186Smat Options options = Options.instance(context); 214168936Stmclaugh annotate = Annotate.instance(context); 215168936Stmclaugh verbose = options.isSet(VERBOSE); 216168542Smiwi checkClassFile = options.isSet("-checkclassfile"); 217168542Smiwi 218169018Strasz Source source = Source.instance(context); 219168542Smiwi allowSimplifiedVarargs = source.allowSimplifiedVarargs(); 220168076Sjmelo 221168076Sjmelo saveParameterNames = options.isSet("save-parameter-names"); 222168123Snetchild 223168123Snetchild profile = Profile.instance(context); 224168126Sale 225168126Sale typevars = WriteableScope.create(syms.noSymbol); 226168472Snovel 227168084Sehaupt lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE); 228168084Sehaupt 229168939Stmclaugh initAttributeReaders(); 230168939Stmclaugh } 231168687Sahze 232168054Sflz /** Add member to class unless it is synthetic. 233168055Spav */ 234168055Spav private void enterMember(ClassSymbol c, Symbol sym) { 235168055Spav // Synthetic members are not entered -- reason lost to history (optimization?). 236168054Sflz // Lambda methods must be entered because they may have inner classes (which reference them) 237168161Sphilip if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda)) 238168161Sphilip c.members_field.enter(sym); 239168274Ssem } 240168274Ssem 241168108Srafan/************************************************************************ 242168274Ssem * Error Diagnoses 243168108Srafan ***********************************************************************/ 244168939Stmclaugh 245168939Stmclaugh public ClassFinder.BadClassFile badClassFile(String key, Object... args) { 246169073Saraujo return new ClassFinder.BadClassFile ( 247169073Saraujo currentOwner.enclClass(), 248168123Snetchild currentClassFile, 249168123Snetchild diagFactory.fragment(key, args), 250168209Sitetcu diagFactory); 251168935Stmclaugh } 252168209Sitetcu 253168939Stmclaugh/************************************************************************ 254168939Stmclaugh * Buffer Access 255168054Sflz ***********************************************************************/ 256 257 /** Read a character. 258 */ 259 char nextChar() { 260 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF)); 261 } 262 263 /** Read a byte. 264 */ 265 int nextByte() { 266 return buf[bp++] & 0xFF; 267 } 268 269 /** Read an integer. 270 */ 271 int nextInt() { 272 return 273 ((buf[bp++] & 0xFF) << 24) + 274 ((buf[bp++] & 0xFF) << 16) + 275 ((buf[bp++] & 0xFF) << 8) + 276 (buf[bp++] & 0xFF); 277 } 278 279 /** Extract a character at position bp from buf. 280 */ 281 char getChar(int bp) { 282 return 283 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF)); 284 } 285 286 /** Extract an integer at position bp from buf. 287 */ 288 int getInt(int bp) { 289 return 290 ((buf[bp] & 0xFF) << 24) + 291 ((buf[bp+1] & 0xFF) << 16) + 292 ((buf[bp+2] & 0xFF) << 8) + 293 (buf[bp+3] & 0xFF); 294 } 295 296 297 /** Extract a long integer at position bp from buf. 298 */ 299 long getLong(int bp) { 300 DataInputStream bufin = 301 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 302 try { 303 return bufin.readLong(); 304 } catch (IOException e) { 305 throw new AssertionError(e); 306 } 307 } 308 309 /** Extract a float at position bp from buf. 310 */ 311 float getFloat(int bp) { 312 DataInputStream bufin = 313 new DataInputStream(new ByteArrayInputStream(buf, bp, 4)); 314 try { 315 return bufin.readFloat(); 316 } catch (IOException e) { 317 throw new AssertionError(e); 318 } 319 } 320 321 /** Extract a double at position bp from buf. 322 */ 323 double getDouble(int bp) { 324 DataInputStream bufin = 325 new DataInputStream(new ByteArrayInputStream(buf, bp, 8)); 326 try { 327 return bufin.readDouble(); 328 } catch (IOException e) { 329 throw new AssertionError(e); 330 } 331 } 332 333/************************************************************************ 334 * Constant Pool Access 335 ***********************************************************************/ 336 337 /** Index all constant pool entries, writing their start addresses into 338 * poolIdx. 339 */ 340 void indexPool() { 341 poolIdx = new int[nextChar()]; 342 poolObj = new Object[poolIdx.length]; 343 int i = 1; 344 while (i < poolIdx.length) { 345 poolIdx[i++] = bp; 346 byte tag = buf[bp++]; 347 switch (tag) { 348 case CONSTANT_Utf8: case CONSTANT_Unicode: { 349 int len = nextChar(); 350 bp = bp + len; 351 break; 352 } 353 case CONSTANT_Class: 354 case CONSTANT_String: 355 case CONSTANT_MethodType: 356 bp = bp + 2; 357 break; 358 case CONSTANT_MethodHandle: 359 bp = bp + 3; 360 break; 361 case CONSTANT_Fieldref: 362 case CONSTANT_Methodref: 363 case CONSTANT_InterfaceMethodref: 364 case CONSTANT_NameandType: 365 case CONSTANT_Integer: 366 case CONSTANT_Float: 367 case CONSTANT_InvokeDynamic: 368 bp = bp + 4; 369 break; 370 case CONSTANT_Long: 371 case CONSTANT_Double: 372 bp = bp + 8; 373 i++; 374 break; 375 default: 376 throw badClassFile("bad.const.pool.tag.at", 377 Byte.toString(tag), 378 Integer.toString(bp -1)); 379 } 380 } 381 } 382 383 /** Read constant pool entry at start address i, use pool as a cache. 384 */ 385 Object readPool(int i) { 386 Object result = poolObj[i]; 387 if (result != null) return result; 388 389 int index = poolIdx[i]; 390 if (index == 0) return null; 391 392 byte tag = buf[index]; 393 switch (tag) { 394 case CONSTANT_Utf8: 395 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1)); 396 break; 397 case CONSTANT_Unicode: 398 throw badClassFile("unicode.str.not.supported"); 399 case CONSTANT_Class: 400 poolObj[i] = readClassOrType(getChar(index + 1)); 401 break; 402 case CONSTANT_String: 403 // FIXME: (footprint) do not use toString here 404 poolObj[i] = readName(getChar(index + 1)).toString(); 405 break; 406 case CONSTANT_Fieldref: { 407 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 408 NameAndType nt = readNameAndType(getChar(index + 3)); 409 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner); 410 break; 411 } 412 case CONSTANT_Methodref: 413 case CONSTANT_InterfaceMethodref: { 414 ClassSymbol owner = readClassSymbol(getChar(index + 1)); 415 NameAndType nt = readNameAndType(getChar(index + 3)); 416 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner); 417 break; 418 } 419 case CONSTANT_NameandType: 420 poolObj[i] = new NameAndType( 421 readName(getChar(index + 1)), 422 readType(getChar(index + 3)), types); 423 break; 424 case CONSTANT_Integer: 425 poolObj[i] = getInt(index + 1); 426 break; 427 case CONSTANT_Float: 428 poolObj[i] = new Float(getFloat(index + 1)); 429 break; 430 case CONSTANT_Long: 431 poolObj[i] = new Long(getLong(index + 1)); 432 break; 433 case CONSTANT_Double: 434 poolObj[i] = new Double(getDouble(index + 1)); 435 break; 436 case CONSTANT_MethodHandle: 437 skipBytes(4); 438 break; 439 case CONSTANT_MethodType: 440 skipBytes(3); 441 break; 442 case CONSTANT_InvokeDynamic: 443 skipBytes(5); 444 break; 445 default: 446 throw badClassFile("bad.const.pool.tag", Byte.toString(tag)); 447 } 448 return poolObj[i]; 449 } 450 451 /** Read signature and convert to type. 452 */ 453 Type readType(int i) { 454 int index = poolIdx[i]; 455 return sigToType(buf, index + 3, getChar(index + 1)); 456 } 457 458 /** If name is an array type or class signature, return the 459 * corresponding type; otherwise return a ClassSymbol with given name. 460 */ 461 Object readClassOrType(int i) { 462 int index = poolIdx[i]; 463 int len = getChar(index + 1); 464 int start = index + 3; 465 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';'); 466 // by the above assertion, the following test can be 467 // simplified to (buf[start] == '[') 468 return (buf[start] == '[' || buf[start + len - 1] == ';') 469 ? (Object)sigToType(buf, start, len) 470 : (Object)syms.enterClass(names.fromUtf(internalize(buf, start, 471 len))); 472 } 473 474 /** Read signature and convert to type parameters. 475 */ 476 List<Type> readTypeParams(int i) { 477 int index = poolIdx[i]; 478 return sigToTypeParams(buf, index + 3, getChar(index + 1)); 479 } 480 481 /** Read class entry. 482 */ 483 ClassSymbol readClassSymbol(int i) { 484 Object obj = readPool(i); 485 if (obj != null && !(obj instanceof ClassSymbol)) 486 throw badClassFile("bad.const.pool.entry", 487 currentClassFile.toString(), 488 "CONSTANT_Class_info", i); 489 return (ClassSymbol)obj; 490 } 491 492 /** Read name. 493 */ 494 Name readName(int i) { 495 Object obj = readPool(i); 496 if (obj != null && !(obj instanceof Name)) 497 throw badClassFile("bad.const.pool.entry", 498 currentClassFile.toString(), 499 "CONSTANT_Utf8_info or CONSTANT_String_info", i); 500 return (Name)obj; 501 } 502 503 /** Read name and type. 504 */ 505 NameAndType readNameAndType(int i) { 506 Object obj = readPool(i); 507 if (obj != null && !(obj instanceof NameAndType)) 508 throw badClassFile("bad.const.pool.entry", 509 currentClassFile.toString(), 510 "CONSTANT_NameAndType_info", i); 511 return (NameAndType)obj; 512 } 513 514/************************************************************************ 515 * Reading Types 516 ***********************************************************************/ 517 518 /** The unread portion of the currently read type is 519 * signature[sigp..siglimit-1]. 520 */ 521 byte[] signature; 522 int sigp; 523 int siglimit; 524 boolean sigEnterPhase = false; 525 526 /** Convert signature to type, where signature is a byte array segment. 527 */ 528 Type sigToType(byte[] sig, int offset, int len) { 529 signature = sig; 530 sigp = offset; 531 siglimit = offset + len; 532 return sigToType(); 533 } 534 535 /** Convert signature to type, where signature is implicit. 536 */ 537 Type sigToType() { 538 switch ((char) signature[sigp]) { 539 case 'T': 540 sigp++; 541 int start = sigp; 542 while (signature[sigp] != ';') sigp++; 543 sigp++; 544 return sigEnterPhase 545 ? Type.noType 546 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start)); 547 case '+': { 548 sigp++; 549 Type t = sigToType(); 550 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass); 551 } 552 case '*': 553 sigp++; 554 return new WildcardType(syms.objectType, BoundKind.UNBOUND, 555 syms.boundClass); 556 case '-': { 557 sigp++; 558 Type t = sigToType(); 559 return new WildcardType(t, BoundKind.SUPER, syms.boundClass); 560 } 561 case 'B': 562 sigp++; 563 return syms.byteType; 564 case 'C': 565 sigp++; 566 return syms.charType; 567 case 'D': 568 sigp++; 569 return syms.doubleType; 570 case 'F': 571 sigp++; 572 return syms.floatType; 573 case 'I': 574 sigp++; 575 return syms.intType; 576 case 'J': 577 sigp++; 578 return syms.longType; 579 case 'L': 580 { 581 // int oldsigp = sigp; 582 Type t = classSigToType(); 583 if (sigp < siglimit && signature[sigp] == '.') 584 throw badClassFile("deprecated inner class signature syntax " + 585 "(please recompile from source)"); 586 /* 587 System.err.println(" decoded " + 588 new String(signature, oldsigp, sigp-oldsigp) + 589 " => " + t + " outer " + t.outer()); 590 */ 591 return t; 592 } 593 case 'S': 594 sigp++; 595 return syms.shortType; 596 case 'V': 597 sigp++; 598 return syms.voidType; 599 case 'Z': 600 sigp++; 601 return syms.booleanType; 602 case '[': 603 sigp++; 604 return new ArrayType(sigToType(), syms.arrayClass); 605 case '(': 606 sigp++; 607 List<Type> argtypes = sigToTypes(')'); 608 Type restype = sigToType(); 609 List<Type> thrown = List.nil(); 610 while (signature[sigp] == '^') { 611 sigp++; 612 thrown = thrown.prepend(sigToType()); 613 } 614 // if there is a typevar in the throws clause we should state it. 615 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) { 616 if (l.head.hasTag(TYPEVAR)) { 617 l.head.tsym.flags_field |= THROWS; 618 } 619 } 620 return new MethodType(argtypes, 621 restype, 622 thrown.reverse(), 623 syms.methodClass); 624 case '<': 625 typevars = typevars.dup(currentOwner); 626 Type poly = new ForAll(sigToTypeParams(), sigToType()); 627 typevars = typevars.leave(); 628 return poly; 629 default: 630 throw badClassFile("bad.signature", 631 Convert.utf2string(signature, sigp, 10)); 632 } 633 } 634 635 byte[] signatureBuffer = new byte[0]; 636 int sbp = 0; 637 /** Convert class signature to type, where signature is implicit. 638 */ 639 Type classSigToType() { 640 if (signature[sigp] != 'L') 641 throw badClassFile("bad.class.signature", 642 Convert.utf2string(signature, sigp, 10)); 643 sigp++; 644 Type outer = Type.noType; 645 int startSbp = sbp; 646 647 while (true) { 648 final byte c = signature[sigp++]; 649 switch (c) { 650 651 case ';': { // end 652 ClassSymbol t = syms.enterClass(names.fromUtf(signatureBuffer, 653 startSbp, 654 sbp - startSbp)); 655 656 try { 657 return (outer == Type.noType) ? 658 t.erasure(types) : 659 new ClassType(outer, List.<Type>nil(), t); 660 } finally { 661 sbp = startSbp; 662 } 663 } 664 665 case '<': // generic arguments 666 ClassSymbol t = syms.enterClass(names.fromUtf(signatureBuffer, 667 startSbp, 668 sbp - startSbp)); 669 outer = new ClassType(outer, sigToTypes('>'), t) { 670 boolean completed = false; 671 @Override @DefinedBy(Api.LANGUAGE_MODEL) 672 public Type getEnclosingType() { 673 if (!completed) { 674 completed = true; 675 tsym.complete(); 676 Type enclosingType = tsym.type.getEnclosingType(); 677 if (enclosingType != Type.noType) { 678 List<Type> typeArgs = 679 super.getEnclosingType().allparams(); 680 List<Type> typeParams = 681 enclosingType.allparams(); 682 if (typeParams.length() != typeArgs.length()) { 683 // no "rare" types 684 super.setEnclosingType(types.erasure(enclosingType)); 685 } else { 686 super.setEnclosingType(types.subst(enclosingType, 687 typeParams, 688 typeArgs)); 689 } 690 } else { 691 super.setEnclosingType(Type.noType); 692 } 693 } 694 return super.getEnclosingType(); 695 } 696 @Override 697 public void setEnclosingType(Type outer) { 698 throw new UnsupportedOperationException(); 699 } 700 }; 701 switch (signature[sigp++]) { 702 case ';': 703 if (sigp < signature.length && signature[sigp] == '.') { 704 // support old-style GJC signatures 705 // The signature produced was 706 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>; 707 // rather than say 708 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>; 709 // so we skip past ".Lfoo/Outer$" 710 sigp += (sbp - startSbp) + // "foo/Outer" 711 3; // ".L" and "$" 712 signatureBuffer[sbp++] = (byte)'$'; 713 break; 714 } else { 715 sbp = startSbp; 716 return outer; 717 } 718 case '.': 719 signatureBuffer[sbp++] = (byte)'$'; 720 break; 721 default: 722 throw new AssertionError(signature[sigp-1]); 723 } 724 continue; 725 726 case '.': 727 //we have seen an enclosing non-generic class 728 if (outer != Type.noType) { 729 t = syms.enterClass(names.fromUtf(signatureBuffer, 730 startSbp, 731 sbp - startSbp)); 732 outer = new ClassType(outer, List.<Type>nil(), t); 733 } 734 signatureBuffer[sbp++] = (byte)'$'; 735 continue; 736 case '/': 737 signatureBuffer[sbp++] = (byte)'.'; 738 continue; 739 default: 740 signatureBuffer[sbp++] = c; 741 continue; 742 } 743 } 744 } 745 746 /** Convert (implicit) signature to list of types 747 * until `terminator' is encountered. 748 */ 749 List<Type> sigToTypes(char terminator) { 750 List<Type> head = List.of(null); 751 List<Type> tail = head; 752 while (signature[sigp] != terminator) 753 tail = tail.setTail(List.of(sigToType())); 754 sigp++; 755 return head.tail; 756 } 757 758 /** Convert signature to type parameters, where signature is a byte 759 * array segment. 760 */ 761 List<Type> sigToTypeParams(byte[] sig, int offset, int len) { 762 signature = sig; 763 sigp = offset; 764 siglimit = offset + len; 765 return sigToTypeParams(); 766 } 767 768 /** Convert signature to type parameters, where signature is implicit. 769 */ 770 List<Type> sigToTypeParams() { 771 List<Type> tvars = List.nil(); 772 if (signature[sigp] == '<') { 773 sigp++; 774 int start = sigp; 775 sigEnterPhase = true; 776 while (signature[sigp] != '>') 777 tvars = tvars.prepend(sigToTypeParam()); 778 sigEnterPhase = false; 779 sigp = start; 780 while (signature[sigp] != '>') 781 sigToTypeParam(); 782 sigp++; 783 } 784 return tvars.reverse(); 785 } 786 787 /** Convert (implicit) signature to type parameter. 788 */ 789 Type sigToTypeParam() { 790 int start = sigp; 791 while (signature[sigp] != ':') sigp++; 792 Name name = names.fromUtf(signature, start, sigp - start); 793 TypeVar tvar; 794 if (sigEnterPhase) { 795 tvar = new TypeVar(name, currentOwner, syms.botType); 796 typevars.enter(tvar.tsym); 797 } else { 798 tvar = (TypeVar)findTypeVar(name); 799 } 800 List<Type> bounds = List.nil(); 801 boolean allInterfaces = false; 802 if (signature[sigp] == ':' && signature[sigp+1] == ':') { 803 sigp++; 804 allInterfaces = true; 805 } 806 while (signature[sigp] == ':') { 807 sigp++; 808 bounds = bounds.prepend(sigToType()); 809 } 810 if (!sigEnterPhase) { 811 types.setBounds(tvar, bounds.reverse(), allInterfaces); 812 } 813 return tvar; 814 } 815 816 /** Find type variable with given name in `typevars' scope. 817 */ 818 Type findTypeVar(Name name) { 819 Symbol s = typevars.findFirst(name); 820 if (s != null) { 821 return s.type; 822 } else { 823 if (readingClassAttr) { 824 // While reading the class attribute, the supertypes 825 // might refer to a type variable from an enclosing element 826 // (method or class). 827 // If the type variable is defined in the enclosing class, 828 // we can actually find it in 829 // currentOwner.owner.type.getTypeArguments() 830 // However, until we have read the enclosing method attribute 831 // we don't know for sure if this owner is correct. It could 832 // be a method and there is no way to tell before reading the 833 // enclosing method attribute. 834 TypeVar t = new TypeVar(name, currentOwner, syms.botType); 835 missingTypeVariables = missingTypeVariables.prepend(t); 836 // System.err.println("Missing type var " + name); 837 return t; 838 } 839 throw badClassFile("undecl.type.var", name); 840 } 841 } 842 843/************************************************************************ 844 * Reading Attributes 845 ***********************************************************************/ 846 847 protected enum AttributeKind { CLASS, MEMBER } 848 849 protected abstract class AttributeReader { 850 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) { 851 this.name = name; 852 this.version = version; 853 this.kinds = kinds; 854 } 855 856 protected boolean accepts(AttributeKind kind) { 857 if (kinds.contains(kind)) { 858 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor)) 859 return true; 860 861 if (lintClassfile && !warnedAttrs.contains(name)) { 862 JavaFileObject prev = log.useSource(currentClassFile); 863 try { 864 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr", 865 name, version.major, version.minor, majorVersion, minorVersion); 866 } finally { 867 log.useSource(prev); 868 } 869 warnedAttrs.add(name); 870 } 871 } 872 return false; 873 } 874 875 protected abstract void read(Symbol sym, int attrLen); 876 877 protected final Name name; 878 protected final ClassFile.Version version; 879 protected final Set<AttributeKind> kinds; 880 } 881 882 protected Set<AttributeKind> CLASS_ATTRIBUTE = 883 EnumSet.of(AttributeKind.CLASS); 884 protected Set<AttributeKind> MEMBER_ATTRIBUTE = 885 EnumSet.of(AttributeKind.MEMBER); 886 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE = 887 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER); 888 889 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>(); 890 891 private void initAttributeReaders() { 892 AttributeReader[] readers = { 893 // v45.3 attributes 894 895 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) { 896 protected void read(Symbol sym, int attrLen) { 897 if (readAllOfClassFile || saveParameterNames) 898 ((MethodSymbol)sym).code = readCode(sym); 899 else 900 bp = bp + attrLen; 901 } 902 }, 903 904 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) { 905 protected void read(Symbol sym, int attrLen) { 906 Object v = readPool(nextChar()); 907 // Ignore ConstantValue attribute if field not final. 908 if ((sym.flags() & FINAL) != 0) 909 ((VarSymbol) sym).setData(v); 910 } 911 }, 912 913 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 914 protected void read(Symbol sym, int attrLen) { 915 sym.flags_field |= DEPRECATED; 916 } 917 }, 918 919 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 920 protected void read(Symbol sym, int attrLen) { 921 int nexceptions = nextChar(); 922 List<Type> thrown = List.nil(); 923 for (int j = 0; j < nexceptions; j++) 924 thrown = thrown.prepend(readClassSymbol(nextChar()).type); 925 if (sym.type.getThrownTypes().isEmpty()) 926 sym.type.asMethodType().thrown = thrown.reverse(); 927 } 928 }, 929 930 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) { 931 protected void read(Symbol sym, int attrLen) { 932 ClassSymbol c = (ClassSymbol) sym; 933 readInnerClasses(c); 934 } 935 }, 936 937 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 938 protected void read(Symbol sym, int attrLen) { 939 int newbp = bp + attrLen; 940 if (saveParameterNames && !sawMethodParameters) { 941 // Pick up parameter names from the variable table. 942 // Parameter names are not explicitly identified as such, 943 // but all parameter name entries in the LocalVariableTable 944 // have a start_pc of 0. Therefore, we record the name 945 // indicies of all slots with a start_pc of zero in the 946 // parameterNameIndicies array. 947 // Note that this implicitly honors the JVMS spec that 948 // there may be more than one LocalVariableTable, and that 949 // there is no specified ordering for the entries. 950 int numEntries = nextChar(); 951 for (int i = 0; i < numEntries; i++) { 952 int start_pc = nextChar(); 953 int length = nextChar(); 954 int nameIndex = nextChar(); 955 int sigIndex = nextChar(); 956 int register = nextChar(); 957 if (start_pc == 0) { 958 // ensure array large enough 959 if (register >= parameterNameIndices.length) { 960 int newSize = Math.max(register, parameterNameIndices.length + 8); 961 parameterNameIndices = 962 Arrays.copyOf(parameterNameIndices, newSize); 963 } 964 parameterNameIndices[register] = nameIndex; 965 haveParameterNameIndices = true; 966 } 967 } 968 } 969 bp = newbp; 970 } 971 }, 972 973 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) { 974 protected void read(Symbol sym, int attrlen) { 975 int newbp = bp + attrlen; 976 if (saveParameterNames) { 977 sawMethodParameters = true; 978 int numEntries = nextByte(); 979 parameterNameIndices = new int[numEntries]; 980 haveParameterNameIndices = true; 981 for (int i = 0; i < numEntries; i++) { 982 int nameIndex = nextChar(); 983 int flags = nextChar(); 984 parameterNameIndices[i] = nameIndex; 985 } 986 } 987 bp = newbp; 988 } 989 }, 990 991 992 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) { 993 protected void read(Symbol sym, int attrLen) { 994 ClassSymbol c = (ClassSymbol) sym; 995 Name n = readName(nextChar()); 996 c.sourcefile = new SourceFileObject(n, c.flatname); 997 // If the class is a toplevel class, originating from a Java source file, 998 // but the class name does not match the file name, then it is 999 // an auxiliary class. 1000 String sn = n.toString(); 1001 if (c.owner.kind == PCK && 1002 sn.endsWith(".java") && 1003 !sn.equals(c.name.toString()+".java")) { 1004 c.flags_field |= AUXILIARY; 1005 } 1006 } 1007 }, 1008 1009 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) { 1010 protected void read(Symbol sym, int attrLen) { 1011 sym.flags_field |= SYNTHETIC; 1012 } 1013 }, 1014 1015 // standard v49 attributes 1016 1017 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) { 1018 protected void read(Symbol sym, int attrLen) { 1019 int newbp = bp + attrLen; 1020 readEnclosingMethodAttr(sym); 1021 bp = newbp; 1022 } 1023 }, 1024 1025 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1026 protected void read(Symbol sym, int attrLen) { 1027 if (sym.kind == TYP) { 1028 ClassSymbol c = (ClassSymbol) sym; 1029 readingClassAttr = true; 1030 try { 1031 ClassType ct1 = (ClassType)c.type; 1032 Assert.check(c == currentOwner); 1033 ct1.typarams_field = readTypeParams(nextChar()); 1034 ct1.supertype_field = sigToType(); 1035 ListBuffer<Type> is = new ListBuffer<>(); 1036 while (sigp != siglimit) is.append(sigToType()); 1037 ct1.interfaces_field = is.toList(); 1038 } finally { 1039 readingClassAttr = false; 1040 } 1041 } else { 1042 List<Type> thrown = sym.type.getThrownTypes(); 1043 sym.type = readType(nextChar()); 1044 //- System.err.println(" # " + sym.type); 1045 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty()) 1046 sym.type.asMethodType().thrown = thrown; 1047 1048 } 1049 } 1050 }, 1051 1052 // v49 annotation attributes 1053 1054 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1055 protected void read(Symbol sym, int attrLen) { 1056 attachAnnotationDefault(sym); 1057 } 1058 }, 1059 1060 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1061 protected void read(Symbol sym, int attrLen) { 1062 attachAnnotations(sym); 1063 } 1064 }, 1065 1066 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1067 protected void read(Symbol sym, int attrLen) { 1068 attachParameterAnnotations(sym); 1069 } 1070 }, 1071 1072 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1073 protected void read(Symbol sym, int attrLen) { 1074 attachAnnotations(sym); 1075 } 1076 }, 1077 1078 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1079 protected void read(Symbol sym, int attrLen) { 1080 attachParameterAnnotations(sym); 1081 } 1082 }, 1083 1084 // additional "legacy" v49 attributes, superceded by flags 1085 1086 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1087 protected void read(Symbol sym, int attrLen) { 1088 sym.flags_field |= ANNOTATION; 1089 } 1090 }, 1091 1092 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) { 1093 protected void read(Symbol sym, int attrLen) { 1094 sym.flags_field |= BRIDGE; 1095 } 1096 }, 1097 1098 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1099 protected void read(Symbol sym, int attrLen) { 1100 sym.flags_field |= ENUM; 1101 } 1102 }, 1103 1104 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) { 1105 protected void read(Symbol sym, int attrLen) { 1106 sym.flags_field |= VARARGS; 1107 } 1108 }, 1109 1110 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1111 protected void read(Symbol sym, int attrLen) { 1112 attachTypeAnnotations(sym); 1113 } 1114 }, 1115 1116 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) { 1117 protected void read(Symbol sym, int attrLen) { 1118 attachTypeAnnotations(sym); 1119 } 1120 }, 1121 1122 1123 // The following attributes for a Code attribute are not currently handled 1124 // StackMapTable 1125 // SourceDebugExtension 1126 // LineNumberTable 1127 // LocalVariableTypeTable 1128 }; 1129 1130 for (AttributeReader r: readers) 1131 attributeReaders.put(r.name, r); 1132 } 1133 1134 /** Report unrecognized attribute. 1135 */ 1136 void unrecognized(Name attrName) { 1137 if (checkClassFile) 1138 printCCF("ccf.unrecognized.attribute", attrName); 1139 } 1140 1141 1142 1143 protected void readEnclosingMethodAttr(Symbol sym) { 1144 // sym is a nested class with an "Enclosing Method" attribute 1145 // remove sym from it's current owners scope and place it in 1146 // the scope specified by the attribute 1147 sym.owner.members().remove(sym); 1148 ClassSymbol self = (ClassSymbol)sym; 1149 ClassSymbol c = readClassSymbol(nextChar()); 1150 NameAndType nt = readNameAndType(nextChar()); 1151 1152 if (c.members_field == null) 1153 throw badClassFile("bad.enclosing.class", self, c); 1154 1155 MethodSymbol m = findMethod(nt, c.members_field, self.flags()); 1156 if (nt != null && m == null) 1157 throw badClassFile("bad.enclosing.method", self); 1158 1159 self.name = simpleBinaryName(self.flatname, c.flatname) ; 1160 self.owner = m != null ? m : c; 1161 if (self.name.isEmpty()) 1162 self.fullname = names.empty; 1163 else 1164 self.fullname = ClassSymbol.formFullName(self.name, self.owner); 1165 1166 if (m != null) { 1167 ((ClassType)sym.type).setEnclosingType(m.type); 1168 } else if ((self.flags_field & STATIC) == 0) { 1169 ((ClassType)sym.type).setEnclosingType(c.type); 1170 } else { 1171 ((ClassType)sym.type).setEnclosingType(Type.noType); 1172 } 1173 enterTypevars(self); 1174 if (!missingTypeVariables.isEmpty()) { 1175 ListBuffer<Type> typeVars = new ListBuffer<>(); 1176 for (Type typevar : missingTypeVariables) { 1177 typeVars.append(findTypeVar(typevar.tsym.name)); 1178 } 1179 foundTypeVariables = typeVars.toList(); 1180 } else { 1181 foundTypeVariables = List.nil(); 1182 } 1183 } 1184 1185 // See java.lang.Class 1186 private Name simpleBinaryName(Name self, Name enclosing) { 1187 String simpleBinaryName = self.toString().substring(enclosing.toString().length()); 1188 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$') 1189 throw badClassFile("bad.enclosing.method", self); 1190 int index = 1; 1191 while (index < simpleBinaryName.length() && 1192 isAsciiDigit(simpleBinaryName.charAt(index))) 1193 index++; 1194 return names.fromString(simpleBinaryName.substring(index)); 1195 } 1196 1197 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) { 1198 if (nt == null) 1199 return null; 1200 1201 MethodType type = nt.uniqueType.type.asMethodType(); 1202 1203 for (Symbol sym : scope.getSymbolsByName(nt.name)) { 1204 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type)) 1205 return (MethodSymbol)sym; 1206 } 1207 1208 if (nt.name != names.init) 1209 // not a constructor 1210 return null; 1211 if ((flags & INTERFACE) != 0) 1212 // no enclosing instance 1213 return null; 1214 if (nt.uniqueType.type.getParameterTypes().isEmpty()) 1215 // no parameters 1216 return null; 1217 1218 // A constructor of an inner class. 1219 // Remove the first argument (the enclosing instance) 1220 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail, 1221 nt.uniqueType.type.getReturnType(), 1222 nt.uniqueType.type.getThrownTypes(), 1223 syms.methodClass)); 1224 // Try searching again 1225 return findMethod(nt, scope, flags); 1226 } 1227 1228 /** Similar to Types.isSameType but avoids completion */ 1229 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) { 1230 List<Type> types1 = types.erasure(mt1.getParameterTypes()) 1231 .prepend(types.erasure(mt1.getReturnType())); 1232 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType()); 1233 while (!types1.isEmpty() && !types2.isEmpty()) { 1234 if (types1.head.tsym != types2.head.tsym) 1235 return false; 1236 types1 = types1.tail; 1237 types2 = types2.tail; 1238 } 1239 return types1.isEmpty() && types2.isEmpty(); 1240 } 1241 1242 /** 1243 * Character.isDigit answers <tt>true</tt> to some non-ascii 1244 * digits. This one does not. <b>copied from java.lang.Class</b> 1245 */ 1246 private static boolean isAsciiDigit(char c) { 1247 return '0' <= c && c <= '9'; 1248 } 1249 1250 /** Read member attributes. 1251 */ 1252 void readMemberAttrs(Symbol sym) { 1253 readAttrs(sym, AttributeKind.MEMBER); 1254 } 1255 1256 void readAttrs(Symbol sym, AttributeKind kind) { 1257 char ac = nextChar(); 1258 for (int i = 0; i < ac; i++) { 1259 Name attrName = readName(nextChar()); 1260 int attrLen = nextInt(); 1261 AttributeReader r = attributeReaders.get(attrName); 1262 if (r != null && r.accepts(kind)) 1263 r.read(sym, attrLen); 1264 else { 1265 unrecognized(attrName); 1266 bp = bp + attrLen; 1267 } 1268 } 1269 } 1270 1271 private boolean readingClassAttr = false; 1272 private List<Type> missingTypeVariables = List.nil(); 1273 private List<Type> foundTypeVariables = List.nil(); 1274 1275 /** Read class attributes. 1276 */ 1277 void readClassAttrs(ClassSymbol c) { 1278 readAttrs(c, AttributeKind.CLASS); 1279 } 1280 1281 /** Read code block. 1282 */ 1283 Code readCode(Symbol owner) { 1284 nextChar(); // max_stack 1285 nextChar(); // max_locals 1286 final int code_length = nextInt(); 1287 bp += code_length; 1288 final char exception_table_length = nextChar(); 1289 bp += exception_table_length * 8; 1290 readMemberAttrs(owner); 1291 return null; 1292 } 1293 1294/************************************************************************ 1295 * Reading Java-language annotations 1296 ***********************************************************************/ 1297 1298 /** Attach annotations. 1299 */ 1300 void attachAnnotations(final Symbol sym) { 1301 int numAttributes = nextChar(); 1302 if (numAttributes != 0) { 1303 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>(); 1304 for (int i = 0; i<numAttributes; i++) { 1305 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1306 if (proxy.type.tsym == syms.proprietaryType.tsym) 1307 sym.flags_field |= PROPRIETARY; 1308 else if (proxy.type.tsym == syms.profileType.tsym) { 1309 if (profile != Profile.DEFAULT) { 1310 for (Pair<Name,Attribute> v: proxy.values) { 1311 if (v.fst == names.value && v.snd instanceof Attribute.Constant) { 1312 Attribute.Constant c = (Attribute.Constant) v.snd; 1313 if (c.type == syms.intType && ((Integer) c.value) > profile.value) { 1314 sym.flags_field |= NOT_IN_PROFILE; 1315 } 1316 } 1317 } 1318 } 1319 } else 1320 proxies.append(proxy); 1321 } 1322 annotate.normal(new AnnotationCompleter(sym, proxies.toList())); 1323 } 1324 } 1325 1326 /** Attach parameter annotations. 1327 */ 1328 void attachParameterAnnotations(final Symbol method) { 1329 final MethodSymbol meth = (MethodSymbol)method; 1330 int numParameters = buf[bp++] & 0xFF; 1331 List<VarSymbol> parameters = meth.params(); 1332 int pnum = 0; 1333 while (parameters.tail != null) { 1334 attachAnnotations(parameters.head); 1335 parameters = parameters.tail; 1336 pnum++; 1337 } 1338 if (pnum != numParameters) { 1339 throw badClassFile("bad.runtime.invisible.param.annotations", meth); 1340 } 1341 } 1342 1343 void attachTypeAnnotations(final Symbol sym) { 1344 int numAttributes = nextChar(); 1345 if (numAttributes != 0) { 1346 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>(); 1347 for (int i = 0; i < numAttributes; i++) 1348 proxies.append(readTypeAnnotation()); 1349 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList())); 1350 } 1351 } 1352 1353 /** Attach the default value for an annotation element. 1354 */ 1355 void attachAnnotationDefault(final Symbol sym) { 1356 final MethodSymbol meth = (MethodSymbol)sym; // only on methods 1357 final Attribute value = readAttributeValue(); 1358 1359 // The default value is set later during annotation. It might 1360 // be the case that the Symbol sym is annotated _after_ the 1361 // repeating instances that depend on this default value, 1362 // because of this we set an interim value that tells us this 1363 // element (most likely) has a default. 1364 // 1365 // Set interim value for now, reset just before we do this 1366 // properly at annotate time. 1367 meth.defaultValue = value; 1368 annotate.normal(new AnnotationDefaultCompleter(meth, value)); 1369 } 1370 1371 Type readTypeOrClassSymbol(int i) { 1372 // support preliminary jsr175-format class files 1373 if (buf[poolIdx[i]] == CONSTANT_Class) 1374 return readClassSymbol(i).type; 1375 return readType(i); 1376 } 1377 Type readEnumType(int i) { 1378 // support preliminary jsr175-format class files 1379 int index = poolIdx[i]; 1380 int length = getChar(index + 1); 1381 if (buf[index + length + 2] != ';') 1382 return syms.enterClass(readName(i)).type; 1383 return readType(i); 1384 } 1385 1386 CompoundAnnotationProxy readCompoundAnnotation() { 1387 Type t = readTypeOrClassSymbol(nextChar()); 1388 int numFields = nextChar(); 1389 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>(); 1390 for (int i=0; i<numFields; i++) { 1391 Name name = readName(nextChar()); 1392 Attribute value = readAttributeValue(); 1393 pairs.append(new Pair<>(name, value)); 1394 } 1395 return new CompoundAnnotationProxy(t, pairs.toList()); 1396 } 1397 1398 TypeAnnotationProxy readTypeAnnotation() { 1399 TypeAnnotationPosition position = readPosition(); 1400 CompoundAnnotationProxy proxy = readCompoundAnnotation(); 1401 1402 return new TypeAnnotationProxy(proxy, position); 1403 } 1404 1405 TypeAnnotationPosition readPosition() { 1406 int tag = nextByte(); // TargetType tag is a byte 1407 1408 if (!TargetType.isValidTargetTypeValue(tag)) 1409 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag)); 1410 1411 TargetType type = TargetType.fromTargetTypeValue(tag); 1412 1413 switch (type) { 1414 // instanceof 1415 case INSTANCEOF: { 1416 final int offset = nextChar(); 1417 final TypeAnnotationPosition position = 1418 TypeAnnotationPosition.instanceOf(readTypePath()); 1419 position.offset = offset; 1420 return position; 1421 } 1422 // new expression 1423 case NEW: { 1424 final int offset = nextChar(); 1425 final TypeAnnotationPosition position = 1426 TypeAnnotationPosition.newObj(readTypePath()); 1427 position.offset = offset; 1428 return position; 1429 } 1430 // constructor/method reference receiver 1431 case CONSTRUCTOR_REFERENCE: { 1432 final int offset = nextChar(); 1433 final TypeAnnotationPosition position = 1434 TypeAnnotationPosition.constructorRef(readTypePath()); 1435 position.offset = offset; 1436 return position; 1437 } 1438 case METHOD_REFERENCE: { 1439 final int offset = nextChar(); 1440 final TypeAnnotationPosition position = 1441 TypeAnnotationPosition.methodRef(readTypePath()); 1442 position.offset = offset; 1443 return position; 1444 } 1445 // local variable 1446 case LOCAL_VARIABLE: { 1447 final int table_length = nextChar(); 1448 final int[] newLvarOffset = new int[table_length]; 1449 final int[] newLvarLength = new int[table_length]; 1450 final int[] newLvarIndex = new int[table_length]; 1451 1452 for (int i = 0; i < table_length; ++i) { 1453 newLvarOffset[i] = nextChar(); 1454 newLvarLength[i] = nextChar(); 1455 newLvarIndex[i] = nextChar(); 1456 } 1457 1458 final TypeAnnotationPosition position = 1459 TypeAnnotationPosition.localVariable(readTypePath()); 1460 position.lvarOffset = newLvarOffset; 1461 position.lvarLength = newLvarLength; 1462 position.lvarIndex = newLvarIndex; 1463 return position; 1464 } 1465 // resource variable 1466 case RESOURCE_VARIABLE: { 1467 final int table_length = nextChar(); 1468 final int[] newLvarOffset = new int[table_length]; 1469 final int[] newLvarLength = new int[table_length]; 1470 final int[] newLvarIndex = new int[table_length]; 1471 1472 for (int i = 0; i < table_length; ++i) { 1473 newLvarOffset[i] = nextChar(); 1474 newLvarLength[i] = nextChar(); 1475 newLvarIndex[i] = nextChar(); 1476 } 1477 1478 final TypeAnnotationPosition position = 1479 TypeAnnotationPosition.resourceVariable(readTypePath()); 1480 position.lvarOffset = newLvarOffset; 1481 position.lvarLength = newLvarLength; 1482 position.lvarIndex = newLvarIndex; 1483 return position; 1484 } 1485 // exception parameter 1486 case EXCEPTION_PARAMETER: { 1487 final int exception_index = nextChar(); 1488 final TypeAnnotationPosition position = 1489 TypeAnnotationPosition.exceptionParameter(readTypePath()); 1490 position.setExceptionIndex(exception_index); 1491 return position; 1492 } 1493 // method receiver 1494 case METHOD_RECEIVER: 1495 return TypeAnnotationPosition.methodReceiver(readTypePath()); 1496 // type parameter 1497 case CLASS_TYPE_PARAMETER: { 1498 final int parameter_index = nextByte(); 1499 return TypeAnnotationPosition 1500 .typeParameter(readTypePath(), parameter_index); 1501 } 1502 case METHOD_TYPE_PARAMETER: { 1503 final int parameter_index = nextByte(); 1504 return TypeAnnotationPosition 1505 .methodTypeParameter(readTypePath(), parameter_index); 1506 } 1507 // type parameter bound 1508 case CLASS_TYPE_PARAMETER_BOUND: { 1509 final int parameter_index = nextByte(); 1510 final int bound_index = nextByte(); 1511 return TypeAnnotationPosition 1512 .typeParameterBound(readTypePath(), parameter_index, 1513 bound_index); 1514 } 1515 case METHOD_TYPE_PARAMETER_BOUND: { 1516 final int parameter_index = nextByte(); 1517 final int bound_index = nextByte(); 1518 return TypeAnnotationPosition 1519 .methodTypeParameterBound(readTypePath(), parameter_index, 1520 bound_index); 1521 } 1522 // class extends or implements clause 1523 case CLASS_EXTENDS: { 1524 final int type_index = nextChar(); 1525 return TypeAnnotationPosition.classExtends(readTypePath(), 1526 type_index); 1527 } 1528 // throws 1529 case THROWS: { 1530 final int type_index = nextChar(); 1531 return TypeAnnotationPosition.methodThrows(readTypePath(), 1532 type_index); 1533 } 1534 // method parameter 1535 case METHOD_FORMAL_PARAMETER: { 1536 final int parameter_index = nextByte(); 1537 return TypeAnnotationPosition.methodParameter(readTypePath(), 1538 parameter_index); 1539 } 1540 // type cast 1541 case CAST: { 1542 final int offset = nextChar(); 1543 final int type_index = nextByte(); 1544 final TypeAnnotationPosition position = 1545 TypeAnnotationPosition.typeCast(readTypePath(), type_index); 1546 position.offset = offset; 1547 return position; 1548 } 1549 // method/constructor/reference type argument 1550 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: { 1551 final int offset = nextChar(); 1552 final int type_index = nextByte(); 1553 final TypeAnnotationPosition position = TypeAnnotationPosition 1554 .constructorInvocationTypeArg(readTypePath(), type_index); 1555 position.offset = offset; 1556 return position; 1557 } 1558 case METHOD_INVOCATION_TYPE_ARGUMENT: { 1559 final int offset = nextChar(); 1560 final int type_index = nextByte(); 1561 final TypeAnnotationPosition position = TypeAnnotationPosition 1562 .methodInvocationTypeArg(readTypePath(), type_index); 1563 position.offset = offset; 1564 return position; 1565 } 1566 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: { 1567 final int offset = nextChar(); 1568 final int type_index = nextByte(); 1569 final TypeAnnotationPosition position = TypeAnnotationPosition 1570 .constructorRefTypeArg(readTypePath(), type_index); 1571 position.offset = offset; 1572 return position; 1573 } 1574 case METHOD_REFERENCE_TYPE_ARGUMENT: { 1575 final int offset = nextChar(); 1576 final int type_index = nextByte(); 1577 final TypeAnnotationPosition position = TypeAnnotationPosition 1578 .methodRefTypeArg(readTypePath(), type_index); 1579 position.offset = offset; 1580 return position; 1581 } 1582 // We don't need to worry about these 1583 case METHOD_RETURN: 1584 return TypeAnnotationPosition.methodReturn(readTypePath()); 1585 case FIELD: 1586 return TypeAnnotationPosition.field(readTypePath()); 1587 case UNKNOWN: 1588 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!"); 1589 default: 1590 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type); 1591 } 1592 } 1593 1594 List<TypeAnnotationPosition.TypePathEntry> readTypePath() { 1595 int len = nextByte(); 1596 ListBuffer<Integer> loc = new ListBuffer<>(); 1597 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i) 1598 loc = loc.append(nextByte()); 1599 1600 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList()); 1601 1602 } 1603 1604 Attribute readAttributeValue() { 1605 char c = (char) buf[bp++]; 1606 switch (c) { 1607 case 'B': 1608 return new Attribute.Constant(syms.byteType, readPool(nextChar())); 1609 case 'C': 1610 return new Attribute.Constant(syms.charType, readPool(nextChar())); 1611 case 'D': 1612 return new Attribute.Constant(syms.doubleType, readPool(nextChar())); 1613 case 'F': 1614 return new Attribute.Constant(syms.floatType, readPool(nextChar())); 1615 case 'I': 1616 return new Attribute.Constant(syms.intType, readPool(nextChar())); 1617 case 'J': 1618 return new Attribute.Constant(syms.longType, readPool(nextChar())); 1619 case 'S': 1620 return new Attribute.Constant(syms.shortType, readPool(nextChar())); 1621 case 'Z': 1622 return new Attribute.Constant(syms.booleanType, readPool(nextChar())); 1623 case 's': 1624 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString()); 1625 case 'e': 1626 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar())); 1627 case 'c': 1628 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar())); 1629 case '[': { 1630 int n = nextChar(); 1631 ListBuffer<Attribute> l = new ListBuffer<>(); 1632 for (int i=0; i<n; i++) 1633 l.append(readAttributeValue()); 1634 return new ArrayAttributeProxy(l.toList()); 1635 } 1636 case '@': 1637 return readCompoundAnnotation(); 1638 default: 1639 throw new AssertionError("unknown annotation tag '" + c + "'"); 1640 } 1641 } 1642 1643 interface ProxyVisitor extends Attribute.Visitor { 1644 void visitEnumAttributeProxy(EnumAttributeProxy proxy); 1645 void visitArrayAttributeProxy(ArrayAttributeProxy proxy); 1646 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy); 1647 } 1648 1649 static class EnumAttributeProxy extends Attribute { 1650 Type enumType; 1651 Name enumerator; 1652 public EnumAttributeProxy(Type enumType, Name enumerator) { 1653 super(null); 1654 this.enumType = enumType; 1655 this.enumerator = enumerator; 1656 } 1657 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); } 1658 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1659 public String toString() { 1660 return "/*proxy enum*/" + enumType + "." + enumerator; 1661 } 1662 } 1663 1664 static class ArrayAttributeProxy extends Attribute { 1665 List<Attribute> values; 1666 ArrayAttributeProxy(List<Attribute> values) { 1667 super(null); 1668 this.values = values; 1669 } 1670 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); } 1671 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1672 public String toString() { 1673 return "{" + values + "}"; 1674 } 1675 } 1676 1677 /** A temporary proxy representing a compound attribute. 1678 */ 1679 static class CompoundAnnotationProxy extends Attribute { 1680 final List<Pair<Name,Attribute>> values; 1681 public CompoundAnnotationProxy(Type type, 1682 List<Pair<Name,Attribute>> values) { 1683 super(type); 1684 this.values = values; 1685 } 1686 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); } 1687 @Override @DefinedBy(Api.LANGUAGE_MODEL) 1688 public String toString() { 1689 StringBuilder buf = new StringBuilder(); 1690 buf.append("@"); 1691 buf.append(type.tsym.getQualifiedName()); 1692 buf.append("/*proxy*/{"); 1693 boolean first = true; 1694 for (List<Pair<Name,Attribute>> v = values; 1695 v.nonEmpty(); v = v.tail) { 1696 Pair<Name,Attribute> value = v.head; 1697 if (!first) buf.append(","); 1698 first = false; 1699 buf.append(value.fst); 1700 buf.append("="); 1701 buf.append(value.snd); 1702 } 1703 buf.append("}"); 1704 return buf.toString(); 1705 } 1706 } 1707 1708 /** A temporary proxy representing a type annotation. 1709 */ 1710 static class TypeAnnotationProxy { 1711 final CompoundAnnotationProxy compound; 1712 final TypeAnnotationPosition position; 1713 public TypeAnnotationProxy(CompoundAnnotationProxy compound, 1714 TypeAnnotationPosition position) { 1715 this.compound = compound; 1716 this.position = position; 1717 } 1718 } 1719 1720 class AnnotationDeproxy implements ProxyVisitor { 1721 private ClassSymbol requestingOwner = currentOwner.kind == MTH 1722 ? currentOwner.enclClass() : (ClassSymbol)currentOwner; 1723 1724 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) { 1725 // also must fill in types!!!! 1726 ListBuffer<Attribute.Compound> buf = new ListBuffer<>(); 1727 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) { 1728 buf.append(deproxyCompound(l.head)); 1729 } 1730 return buf.toList(); 1731 } 1732 1733 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) { 1734 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>(); 1735 for (List<Pair<Name,Attribute>> l = a.values; 1736 l.nonEmpty(); 1737 l = l.tail) { 1738 MethodSymbol meth = findAccessMethod(a.type, l.head.fst); 1739 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd))); 1740 } 1741 return new Attribute.Compound(a.type, buf.toList()); 1742 } 1743 1744 MethodSymbol findAccessMethod(Type container, Name name) { 1745 CompletionFailure failure = null; 1746 try { 1747 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) { 1748 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0) 1749 return (MethodSymbol) sym; 1750 } 1751 } catch (CompletionFailure ex) { 1752 failure = ex; 1753 } 1754 // The method wasn't found: emit a warning and recover 1755 JavaFileObject prevSource = log.useSource(requestingOwner.classfile); 1756 try { 1757 if (failure == null) { 1758 log.warning("annotation.method.not.found", 1759 container, 1760 name); 1761 } else { 1762 log.warning("annotation.method.not.found.reason", 1763 container, 1764 name, 1765 failure.getDetailValue());//diagnostic, if present 1766 } 1767 } finally { 1768 log.useSource(prevSource); 1769 } 1770 // Construct a new method type and symbol. Use bottom 1771 // type (typeof null) as return type because this type is 1772 // a subtype of all reference types and can be converted 1773 // to primitive types by unboxing. 1774 MethodType mt = new MethodType(List.<Type>nil(), 1775 syms.botType, 1776 List.<Type>nil(), 1777 syms.methodClass); 1778 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym); 1779 } 1780 1781 Attribute result; 1782 Type type; 1783 Attribute deproxy(Type t, Attribute a) { 1784 Type oldType = type; 1785 try { 1786 type = t; 1787 a.accept(this); 1788 return result; 1789 } finally { 1790 type = oldType; 1791 } 1792 } 1793 1794 // implement Attribute.Visitor below 1795 1796 public void visitConstant(Attribute.Constant value) { 1797 // assert value.type == type; 1798 result = value; 1799 } 1800 1801 public void visitClass(Attribute.Class clazz) { 1802 result = clazz; 1803 } 1804 1805 public void visitEnum(Attribute.Enum e) { 1806 throw new AssertionError(); // shouldn't happen 1807 } 1808 1809 public void visitCompound(Attribute.Compound compound) { 1810 throw new AssertionError(); // shouldn't happen 1811 } 1812 1813 public void visitArray(Attribute.Array array) { 1814 throw new AssertionError(); // shouldn't happen 1815 } 1816 1817 public void visitError(Attribute.Error e) { 1818 throw new AssertionError(); // shouldn't happen 1819 } 1820 1821 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) { 1822 // type.tsym.flatName() should == proxy.enumFlatName 1823 TypeSymbol enumTypeSym = proxy.enumType.tsym; 1824 VarSymbol enumerator = null; 1825 CompletionFailure failure = null; 1826 try { 1827 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) { 1828 if (sym.kind == VAR) { 1829 enumerator = (VarSymbol)sym; 1830 break; 1831 } 1832 } 1833 } 1834 catch (CompletionFailure ex) { 1835 failure = ex; 1836 } 1837 if (enumerator == null) { 1838 if (failure != null) { 1839 log.warning("unknown.enum.constant.reason", 1840 currentClassFile, enumTypeSym, proxy.enumerator, 1841 failure.getDiagnostic()); 1842 } else { 1843 log.warning("unknown.enum.constant", 1844 currentClassFile, enumTypeSym, proxy.enumerator); 1845 } 1846 result = new Attribute.Enum(enumTypeSym.type, 1847 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym)); 1848 } else { 1849 result = new Attribute.Enum(enumTypeSym.type, enumerator); 1850 } 1851 } 1852 1853 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) { 1854 int length = proxy.values.length(); 1855 Attribute[] ats = new Attribute[length]; 1856 Type elemtype = types.elemtype(type); 1857 int i = 0; 1858 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) { 1859 ats[i++] = deproxy(elemtype, p.head); 1860 } 1861 result = new Attribute.Array(type, ats); 1862 } 1863 1864 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) { 1865 result = deproxyCompound(proxy); 1866 } 1867 } 1868 1869 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Worker { 1870 final MethodSymbol sym; 1871 final Attribute value; 1872 final JavaFileObject classFile = currentClassFile; 1873 @Override 1874 public String toString() { 1875 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value; 1876 } 1877 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) { 1878 this.sym = sym; 1879 this.value = value; 1880 } 1881 // implement Annotate.Worker.run() 1882 public void run() { 1883 JavaFileObject previousClassFile = currentClassFile; 1884 try { 1885 // Reset the interim value set earlier in 1886 // attachAnnotationDefault(). 1887 sym.defaultValue = null; 1888 currentClassFile = classFile; 1889 sym.defaultValue = deproxy(sym.type.getReturnType(), value); 1890 } finally { 1891 currentClassFile = previousClassFile; 1892 } 1893 } 1894 } 1895 1896 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Worker { 1897 final Symbol sym; 1898 final List<CompoundAnnotationProxy> l; 1899 final JavaFileObject classFile; 1900 @Override 1901 public String toString() { 1902 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l; 1903 } 1904 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) { 1905 this.sym = sym; 1906 this.l = l; 1907 this.classFile = currentClassFile; 1908 } 1909 // implement Annotate.Worker.run() 1910 public void run() { 1911 JavaFileObject previousClassFile = currentClassFile; 1912 try { 1913 currentClassFile = classFile; 1914 List<Attribute.Compound> newList = deproxyCompoundList(l); 1915 if (sym.annotationsPendingCompletion()) { 1916 sym.setDeclarationAttributes(newList); 1917 } else { 1918 sym.appendAttributes(newList); 1919 } 1920 } finally { 1921 currentClassFile = previousClassFile; 1922 } 1923 } 1924 } 1925 1926 class TypeAnnotationCompleter extends AnnotationCompleter { 1927 1928 List<TypeAnnotationProxy> proxies; 1929 1930 TypeAnnotationCompleter(Symbol sym, 1931 List<TypeAnnotationProxy> proxies) { 1932 super(sym, List.<CompoundAnnotationProxy>nil()); 1933 this.proxies = proxies; 1934 } 1935 1936 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) { 1937 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>(); 1938 for (TypeAnnotationProxy proxy: proxies) { 1939 Attribute.Compound compound = deproxyCompound(proxy.compound); 1940 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position); 1941 buf.add(typeCompound); 1942 } 1943 return buf.toList(); 1944 } 1945 1946 @Override 1947 public void run() { 1948 JavaFileObject previousClassFile = currentClassFile; 1949 try { 1950 currentClassFile = classFile; 1951 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies); 1952 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes())); 1953 } finally { 1954 currentClassFile = previousClassFile; 1955 } 1956 } 1957 } 1958 1959 1960/************************************************************************ 1961 * Reading Symbols 1962 ***********************************************************************/ 1963 1964 /** Read a field. 1965 */ 1966 VarSymbol readField() { 1967 long flags = adjustFieldFlags(nextChar()); 1968 Name name = readName(nextChar()); 1969 Type type = readType(nextChar()); 1970 VarSymbol v = new VarSymbol(flags, name, type, currentOwner); 1971 readMemberAttrs(v); 1972 return v; 1973 } 1974 1975 /** Read a method. 1976 */ 1977 MethodSymbol readMethod() { 1978 long flags = adjustMethodFlags(nextChar()); 1979 Name name = readName(nextChar()); 1980 Type type = readType(nextChar()); 1981 if (currentOwner.isInterface() && 1982 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) { 1983 if (majorVersion > Version.V52.major || 1984 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) { 1985 if ((flags & STATIC) == 0) { 1986 currentOwner.flags_field |= DEFAULT; 1987 flags |= DEFAULT | ABSTRACT; 1988 } 1989 } else { 1990 //protect against ill-formed classfiles 1991 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface", 1992 Integer.toString(majorVersion), 1993 Integer.toString(minorVersion)); 1994 } 1995 } 1996 if (name == names.init && currentOwner.hasOuterInstance()) { 1997 // Sometimes anonymous classes don't have an outer 1998 // instance, however, there is no reliable way to tell so 1999 // we never strip this$n 2000 if (!currentOwner.name.isEmpty()) 2001 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()), 2002 type.getReturnType(), 2003 type.getThrownTypes(), 2004 syms.methodClass); 2005 } 2006 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner); 2007 if (types.isSignaturePolymorphic(m)) { 2008 m.flags_field |= SIGNATURE_POLYMORPHIC; 2009 } 2010 if (saveParameterNames) 2011 initParameterNames(m); 2012 Symbol prevOwner = currentOwner; 2013 currentOwner = m; 2014 try { 2015 readMemberAttrs(m); 2016 } finally { 2017 currentOwner = prevOwner; 2018 } 2019 if (saveParameterNames) 2020 setParameterNames(m, type); 2021 return m; 2022 } 2023 2024 private List<Type> adjustMethodParams(long flags, List<Type> args) { 2025 boolean isVarargs = (flags & VARARGS) != 0; 2026 if (isVarargs) { 2027 Type varargsElem = args.last(); 2028 ListBuffer<Type> adjustedArgs = new ListBuffer<>(); 2029 for (Type t : args) { 2030 adjustedArgs.append(t != varargsElem ? 2031 t : 2032 ((ArrayType)t).makeVarargs()); 2033 } 2034 args = adjustedArgs.toList(); 2035 } 2036 return args.tail; 2037 } 2038 2039 /** 2040 * Init the parameter names array. 2041 * Parameter names are currently inferred from the names in the 2042 * LocalVariableTable attributes of a Code attribute. 2043 * (Note: this means parameter names are currently not available for 2044 * methods without a Code attribute.) 2045 * This method initializes an array in which to store the name indexes 2046 * of parameter names found in LocalVariableTable attributes. It is 2047 * slightly supersized to allow for additional slots with a start_pc of 0. 2048 */ 2049 void initParameterNames(MethodSymbol sym) { 2050 // make allowance for synthetic parameters. 2051 final int excessSlots = 4; 2052 int expectedParameterSlots = 2053 Code.width(sym.type.getParameterTypes()) + excessSlots; 2054 if (parameterNameIndices == null 2055 || parameterNameIndices.length < expectedParameterSlots) { 2056 parameterNameIndices = new int[expectedParameterSlots]; 2057 } else 2058 Arrays.fill(parameterNameIndices, 0); 2059 haveParameterNameIndices = false; 2060 sawMethodParameters = false; 2061 } 2062 2063 /** 2064 * Set the parameter names for a symbol from the name index in the 2065 * parameterNameIndicies array. The type of the symbol may have changed 2066 * while reading the method attributes (see the Signature attribute). 2067 * This may be because of generic information or because anonymous 2068 * synthetic parameters were added. The original type (as read from 2069 * the method descriptor) is used to help guess the existence of 2070 * anonymous synthetic parameters. 2071 * On completion, sym.savedParameter names will either be null (if 2072 * no parameter names were found in the class file) or will be set to a 2073 * list of names, one per entry in sym.type.getParameterTypes, with 2074 * any missing names represented by the empty name. 2075 */ 2076 void setParameterNames(MethodSymbol sym, Type jvmType) { 2077 // if no names were found in the class file, there's nothing more to do 2078 if (!haveParameterNameIndices) 2079 return; 2080 // If we get parameter names from MethodParameters, then we 2081 // don't need to skip. 2082 int firstParam = 0; 2083 if (!sawMethodParameters) { 2084 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0; 2085 // the code in readMethod may have skipped the first 2086 // parameter when setting up the MethodType. If so, we 2087 // make a corresponding allowance here for the position of 2088 // the first parameter. Note that this assumes the 2089 // skipped parameter has a width of 1 -- i.e. it is not 2090 // a double width type (long or double.) 2091 if (sym.name == names.init && currentOwner.hasOuterInstance()) { 2092 // Sometimes anonymous classes don't have an outer 2093 // instance, however, there is no reliable way to tell so 2094 // we never strip this$n 2095 if (!currentOwner.name.isEmpty()) 2096 firstParam += 1; 2097 } 2098 2099 if (sym.type != jvmType) { 2100 // reading the method attributes has caused the 2101 // symbol's type to be changed. (i.e. the Signature 2102 // attribute.) This may happen if there are hidden 2103 // (synthetic) parameters in the descriptor, but not 2104 // in the Signature. The position of these hidden 2105 // parameters is unspecified; for now, assume they are 2106 // at the beginning, and so skip over them. The 2107 // primary case for this is two hidden parameters 2108 // passed into Enum constructors. 2109 int skip = Code.width(jvmType.getParameterTypes()) 2110 - Code.width(sym.type.getParameterTypes()); 2111 firstParam += skip; 2112 } 2113 } 2114 List<Name> paramNames = List.nil(); 2115 int index = firstParam; 2116 for (Type t: sym.type.getParameterTypes()) { 2117 int nameIdx = (index < parameterNameIndices.length 2118 ? parameterNameIndices[index] : 0); 2119 Name name = nameIdx == 0 ? names.empty : readName(nameIdx); 2120 paramNames = paramNames.prepend(name); 2121 index += Code.width(t); 2122 } 2123 sym.savedParameterNames = paramNames.reverse(); 2124 } 2125 2126 /** 2127 * skip n bytes 2128 */ 2129 void skipBytes(int n) { 2130 bp = bp + n; 2131 } 2132 2133 /** Skip a field or method 2134 */ 2135 void skipMember() { 2136 bp = bp + 6; 2137 char ac = nextChar(); 2138 for (int i = 0; i < ac; i++) { 2139 bp = bp + 2; 2140 int attrLen = nextInt(); 2141 bp = bp + attrLen; 2142 } 2143 } 2144 2145 /** Enter type variables of this classtype and all enclosing ones in 2146 * `typevars'. 2147 */ 2148 protected void enterTypevars(Type t) { 2149 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS)) 2150 enterTypevars(t.getEnclosingType()); 2151 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) 2152 typevars.enter(xs.head.tsym); 2153 } 2154 2155 protected void enterTypevars(Symbol sym) { 2156 if (sym.owner.kind == MTH) { 2157 enterTypevars(sym.owner); 2158 enterTypevars(sym.owner.owner); 2159 } 2160 enterTypevars(sym.type); 2161 } 2162 2163 /** Read contents of a given class symbol `c'. Both external and internal 2164 * versions of an inner class are read. 2165 */ 2166 void readClass(ClassSymbol c) { 2167 ClassType ct = (ClassType)c.type; 2168 2169 // allocate scope for members 2170 c.members_field = WriteableScope.create(c); 2171 2172 // prepare type variable table 2173 typevars = typevars.dup(currentOwner); 2174 if (ct.getEnclosingType().hasTag(CLASS)) 2175 enterTypevars(ct.getEnclosingType()); 2176 2177 // read flags, or skip if this is an inner class 2178 long flags = adjustClassFlags(nextChar()); 2179 if (c.owner.kind == PCK) c.flags_field = flags; 2180 2181 // read own class name and check that it matches 2182 ClassSymbol self = readClassSymbol(nextChar()); 2183 if (c != self) 2184 throw badClassFile("class.file.wrong.class", 2185 self.flatname); 2186 2187 // class attributes must be read before class 2188 // skip ahead to read class attributes 2189 int startbp = bp; 2190 nextChar(); 2191 char interfaceCount = nextChar(); 2192 bp += interfaceCount * 2; 2193 char fieldCount = nextChar(); 2194 for (int i = 0; i < fieldCount; i++) skipMember(); 2195 char methodCount = nextChar(); 2196 for (int i = 0; i < methodCount; i++) skipMember(); 2197 readClassAttrs(c); 2198 2199 if (readAllOfClassFile) { 2200 for (int i = 1; i < poolObj.length; i++) readPool(i); 2201 c.pool = new Pool(poolObj.length, poolObj, types); 2202 } 2203 2204 // reset and read rest of classinfo 2205 bp = startbp; 2206 int n = nextChar(); 2207 if (ct.supertype_field == null) 2208 ct.supertype_field = (n == 0) 2209 ? Type.noType 2210 : readClassSymbol(n).erasure(types); 2211 n = nextChar(); 2212 List<Type> is = List.nil(); 2213 for (int i = 0; i < n; i++) { 2214 Type _inter = readClassSymbol(nextChar()).erasure(types); 2215 is = is.prepend(_inter); 2216 } 2217 if (ct.interfaces_field == null) 2218 ct.interfaces_field = is.reverse(); 2219 2220 Assert.check(fieldCount == nextChar()); 2221 for (int i = 0; i < fieldCount; i++) enterMember(c, readField()); 2222 Assert.check(methodCount == nextChar()); 2223 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod()); 2224 2225 typevars = typevars.leave(); 2226 } 2227 2228 /** Read inner class info. For each inner/outer pair allocate a 2229 * member class. 2230 */ 2231 void readInnerClasses(ClassSymbol c) { 2232 int n = nextChar(); 2233 for (int i = 0; i < n; i++) { 2234 nextChar(); // skip inner class symbol 2235 ClassSymbol outer = readClassSymbol(nextChar()); 2236 Name name = readName(nextChar()); 2237 if (name == null) name = names.empty; 2238 long flags = adjustClassFlags(nextChar()); 2239 if (outer != null) { // we have a member class 2240 if (name == names.empty) 2241 name = names.one; 2242 ClassSymbol member = syms.enterClass(name, outer); 2243 if ((flags & STATIC) == 0) { 2244 ((ClassType)member.type).setEnclosingType(outer.type); 2245 if (member.erasure_field != null) 2246 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type)); 2247 } 2248 if (c == outer) { 2249 member.flags_field = flags; 2250 enterMember(c, member); 2251 } 2252 } 2253 } 2254 } 2255 2256 /** Read a class definition from the bytes in buf. 2257 */ 2258 private void readClassBuffer(ClassSymbol c) throws IOException { 2259 int magic = nextInt(); 2260 if (magic != JAVA_MAGIC) 2261 throw badClassFile("illegal.start.of.class.file"); 2262 2263 minorVersion = nextChar(); 2264 majorVersion = nextChar(); 2265 int maxMajor = Version.MAX().major; 2266 int maxMinor = Version.MAX().minor; 2267 if (majorVersion > maxMajor || 2268 majorVersion * 1000 + minorVersion < 2269 Version.MIN().major * 1000 + Version.MIN().minor) 2270 { 2271 if (majorVersion == (maxMajor + 1)) 2272 log.warning("big.major.version", 2273 currentClassFile, 2274 majorVersion, 2275 maxMajor); 2276 else 2277 throw badClassFile("wrong.version", 2278 Integer.toString(majorVersion), 2279 Integer.toString(minorVersion), 2280 Integer.toString(maxMajor), 2281 Integer.toString(maxMinor)); 2282 } 2283 else if (checkClassFile && 2284 majorVersion == maxMajor && 2285 minorVersion > maxMinor) 2286 { 2287 printCCF("found.later.version", 2288 Integer.toString(minorVersion)); 2289 } 2290 indexPool(); 2291 if (signatureBuffer.length < bp) { 2292 int ns = Integer.highestOneBit(bp) << 1; 2293 signatureBuffer = new byte[ns]; 2294 } 2295 readClass(c); 2296 } 2297 2298 public void readClassFile(ClassSymbol c) { 2299 currentOwner = c; 2300 currentClassFile = c.classfile; 2301 warnedAttrs.clear(); 2302 filling = true; 2303 try { 2304 bp = 0; 2305 buf = readInputStream(buf, c.classfile.openInputStream()); 2306 readClassBuffer(c); 2307 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) { 2308 List<Type> missing = missingTypeVariables; 2309 List<Type> found = foundTypeVariables; 2310 missingTypeVariables = List.nil(); 2311 foundTypeVariables = List.nil(); 2312 filling = false; 2313 ClassType ct = (ClassType)currentOwner.type; 2314 ct.supertype_field = 2315 types.subst(ct.supertype_field, missing, found); 2316 ct.interfaces_field = 2317 types.subst(ct.interfaces_field, missing, found); 2318 } else if (missingTypeVariables.isEmpty() != 2319 foundTypeVariables.isEmpty()) { 2320 Name name = missingTypeVariables.head.tsym.name; 2321 throw badClassFile("undecl.type.var", name); 2322 } 2323 } catch (IOException ex) { 2324 throw badClassFile("unable.to.access.file", ex.getMessage()); 2325 } catch (ArrayIndexOutOfBoundsException ex) { 2326 throw badClassFile("bad.class.file", c.flatname); 2327 } finally { 2328 missingTypeVariables = List.nil(); 2329 foundTypeVariables = List.nil(); 2330 filling = false; 2331 } 2332 } 2333 // where 2334 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException { 2335 try { 2336 buf = ensureCapacity(buf, s.available()); 2337 int r = s.read(buf); 2338 int bp = 0; 2339 while (r != -1) { 2340 bp += r; 2341 buf = ensureCapacity(buf, bp); 2342 r = s.read(buf, bp, buf.length - bp); 2343 } 2344 return buf; 2345 } finally { 2346 try { 2347 s.close(); 2348 } catch (IOException e) { 2349 /* Ignore any errors, as this stream may have already 2350 * thrown a related exception which is the one that 2351 * should be reported. 2352 */ 2353 } 2354 } 2355 } 2356 /* 2357 * ensureCapacity will increase the buffer as needed, taking note that 2358 * the new buffer will always be greater than the needed and never 2359 * exactly equal to the needed size or bp. If equal then the read (above) 2360 * will infinitely loop as buf.length - bp == 0. 2361 */ 2362 private static byte[] ensureCapacity(byte[] buf, int needed) { 2363 if (buf.length <= needed) { 2364 byte[] old = buf; 2365 buf = new byte[Integer.highestOneBit(needed) << 1]; 2366 System.arraycopy(old, 0, buf, 0, old.length); 2367 } 2368 return buf; 2369 } 2370 2371 /** We can only read a single class file at a time; this 2372 * flag keeps track of when we are currently reading a class 2373 * file. 2374 */ 2375 public boolean filling = false; 2376 2377/************************************************************************ 2378 * Adjusting flags 2379 ***********************************************************************/ 2380 2381 long adjustFieldFlags(long flags) { 2382 return flags; 2383 } 2384 2385 long adjustMethodFlags(long flags) { 2386 if ((flags & ACC_BRIDGE) != 0) { 2387 flags &= ~ACC_BRIDGE; 2388 flags |= BRIDGE; 2389 } 2390 if ((flags & ACC_VARARGS) != 0) { 2391 flags &= ~ACC_VARARGS; 2392 flags |= VARARGS; 2393 } 2394 return flags; 2395 } 2396 2397 long adjustClassFlags(long flags) { 2398 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded 2399 } 2400 2401 /** Output for "-checkclassfile" option. 2402 * @param key The key to look up the correct internationalized string. 2403 * @param arg An argument for substitution into the output string. 2404 */ 2405 private void printCCF(String key, Object arg) { 2406 log.printLines(key, arg); 2407 } 2408 2409 /** 2410 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile. 2411 * The attribute is only the last component of the original filename, so is unlikely 2412 * to be valid as is, so operations other than those to access the name throw 2413 * UnsupportedOperationException 2414 */ 2415 private static class SourceFileObject extends BaseFileObject { 2416 2417 /** The file's name. 2418 */ 2419 private Name name; 2420 private Name flatname; 2421 2422 public SourceFileObject(Name name, Name flatname) { 2423 super(null); // no file manager; never referenced for this file object 2424 this.name = name; 2425 this.flatname = flatname; 2426 } 2427 2428 @Override @DefinedBy(Api.COMPILER) 2429 public URI toUri() { 2430 try { 2431 return new URI(null, name.toString(), null); 2432 } catch (URISyntaxException e) { 2433 throw new CannotCreateUriError(name.toString(), e); 2434 } 2435 } 2436 2437 @Override @DefinedBy(Api.COMPILER) 2438 public String getName() { 2439 return name.toString(); 2440 } 2441 2442 @Override 2443 public String getShortName() { 2444 return getName(); 2445 } 2446 2447 @Override @DefinedBy(Api.COMPILER) 2448 public JavaFileObject.Kind getKind() { 2449 return getKind(getName()); 2450 } 2451 2452 @Override @DefinedBy(Api.COMPILER) 2453 public InputStream openInputStream() { 2454 throw new UnsupportedOperationException(); 2455 } 2456 2457 @Override @DefinedBy(Api.COMPILER) 2458 public OutputStream openOutputStream() { 2459 throw new UnsupportedOperationException(); 2460 } 2461 2462 @Override @DefinedBy(Api.COMPILER) 2463 public CharBuffer getCharContent(boolean ignoreEncodingErrors) { 2464 throw new UnsupportedOperationException(); 2465 } 2466 2467 @Override @DefinedBy(Api.COMPILER) 2468 public Reader openReader(boolean ignoreEncodingErrors) { 2469 throw new UnsupportedOperationException(); 2470 } 2471 2472 @Override @DefinedBy(Api.COMPILER) 2473 public Writer openWriter() { 2474 throw new UnsupportedOperationException(); 2475 } 2476 2477 @Override @DefinedBy(Api.COMPILER) 2478 public long getLastModified() { 2479 throw new UnsupportedOperationException(); 2480 } 2481 2482 @Override @DefinedBy(Api.COMPILER) 2483 public boolean delete() { 2484 throw new UnsupportedOperationException(); 2485 } 2486 2487 @Override 2488 protected String inferBinaryName(Iterable<? extends Path> path) { 2489 return flatname.toString(); 2490 } 2491 2492 @Override @DefinedBy(Api.COMPILER) 2493 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) { 2494 return true; // fail-safe mode 2495 } 2496 2497 /** 2498 * Check if two file objects are equal. 2499 * SourceFileObjects are just placeholder objects for the value of a 2500 * SourceFile attribute, and do not directly represent specific files. 2501 * Two SourceFileObjects are equal if their names are equal. 2502 */ 2503 @Override 2504 public boolean equals(Object other) { 2505 if (this == other) 2506 return true; 2507 2508 if (!(other instanceof SourceFileObject)) 2509 return false; 2510 2511 SourceFileObject o = (SourceFileObject) other; 2512 return name.equals(o.name); 2513 } 2514 2515 @Override 2516 public int hashCode() { 2517 return name.hashCode(); 2518 } 2519 } 2520} 2521