JavaCompiler.java revision 2981:d1e5707cd4eb
1223695Sdfr/* 2223695Sdfr * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 3223695Sdfr * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4223695Sdfr * 5223695Sdfr * This code is free software; you can redistribute it and/or modify it 6223695Sdfr * under the terms of the GNU General Public License version 2 only, as 7223695Sdfr * published by the Free Software Foundation. Oracle designates this 8223695Sdfr * particular file as subject to the "Classpath" exception as provided 9223695Sdfr * by Oracle in the LICENSE file that accompanied this code. 10223695Sdfr * 11223695Sdfr * This code is distributed in the hope that it will be useful, but WITHOUT 12223695Sdfr * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13223695Sdfr * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14223695Sdfr * version 2 for more details (a copy is included in the LICENSE file that 15223695Sdfr * accompanied this code). 16223695Sdfr * 17223695Sdfr * You should have received a copy of the GNU General Public License version 18223695Sdfr * 2 along with this work; if not, write to the Free Software Foundation, 19223695Sdfr * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20223695Sdfr * 21223695Sdfr * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22223695Sdfr * or visit www.oracle.com if you need additional information or have any 23223695Sdfr * questions. 24223695Sdfr */ 25223695Sdfr 26223695Sdfrpackage com.sun.tools.javac.main; 27223695Sdfr 28223695Sdfrimport java.io.*; 29223695Sdfrimport java.util.Collection; 30223695Sdfrimport java.util.HashMap; 31223695Sdfrimport java.util.HashSet; 32223695Sdfrimport java.util.LinkedHashMap; 33223695Sdfrimport java.util.LinkedHashSet; 34223695Sdfrimport java.util.Map; 35223695Sdfrimport java.util.MissingResourceException; 36223695Sdfrimport java.util.Queue; 37223695Sdfrimport java.util.ResourceBundle; 38223695Sdfrimport java.util.Set; 39223695Sdfr 40223695Sdfrimport javax.annotation.processing.Processor; 41223695Sdfrimport javax.lang.model.SourceVersion; 42223695Sdfrimport javax.tools.DiagnosticListener; 43223695Sdfrimport javax.tools.JavaFileManager; 44223695Sdfrimport javax.tools.JavaFileObject; 45223695Sdfrimport javax.tools.StandardLocation; 46223695Sdfr 47223695Sdfrimport com.sun.source.util.TaskEvent; 48223695Sdfrimport com.sun.tools.javac.api.MultiTaskListener; 49223695Sdfrimport com.sun.tools.javac.code.*; 50223695Sdfrimport com.sun.tools.javac.code.Lint.LintCategory; 51223695Sdfrimport com.sun.tools.javac.code.Symbol.ClassSymbol; 52223695Sdfrimport com.sun.tools.javac.code.Symbol.CompletionFailure; 53223695Sdfrimport com.sun.tools.javac.code.Symbol.PackageSymbol; 54223695Sdfrimport com.sun.tools.javac.comp.*; 55223695Sdfrimport com.sun.tools.javac.comp.CompileStates.CompileState; 56223695Sdfrimport com.sun.tools.javac.file.JavacFileManager; 57223695Sdfrimport com.sun.tools.javac.jvm.*; 58223695Sdfrimport com.sun.tools.javac.parser.*; 59223695Sdfrimport com.sun.tools.javac.platform.PlatformDescription; 60223695Sdfrimport com.sun.tools.javac.processing.*; 61223695Sdfrimport com.sun.tools.javac.tree.*; 62223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCClassDecl; 63223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCCompilationUnit; 64223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCExpression; 65223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCLambda; 66223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCMemberReference; 67223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCMethodDecl; 68223695Sdfrimport com.sun.tools.javac.tree.JCTree.JCVariableDecl; 69223695Sdfrimport com.sun.tools.javac.util.*; 70223695Sdfrimport com.sun.tools.javac.util.Log.WriterKind; 71223695Sdfr 72223695Sdfrimport static com.sun.tools.javac.code.Kinds.Kind.*; 73223695Sdfrimport static com.sun.tools.javac.code.TypeTag.CLASS; 74223695Sdfrimport static com.sun.tools.javac.main.Option.*; 75223695Sdfrimport static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*; 76223695Sdfrimport static javax.tools.StandardLocation.CLASS_OUTPUT; 77223695Sdfr 78223695Sdfr/** This class could be the main entry point for GJC when GJC is used as a 79223695Sdfr * component in a larger software system. It provides operations to 80223695Sdfr * construct a new compiler, and to run a new compiler on a set of source 81223695Sdfr * files. 82223695Sdfr * 83223695Sdfr * <p><b>This is NOT part of any supported API. 84223695Sdfr * If you write code that depends on this, you do so at your own risk. 85223695Sdfr * This code and its internal interfaces are subject to change or 86223695Sdfr * deletion without notice.</b> 87223695Sdfr */ 88223695Sdfrpublic class JavaCompiler { 89223695Sdfr /** The context key for the compiler. */ 90223695Sdfr protected static final Context.Key<JavaCompiler> compilerKey = new Context.Key<>(); 91223695Sdfr 92223695Sdfr /** Get the JavaCompiler instance for this context. */ 93223695Sdfr public static JavaCompiler instance(Context context) { 94 JavaCompiler instance = context.get(compilerKey); 95 if (instance == null) 96 instance = new JavaCompiler(context); 97 return instance; 98 } 99 100 /** The current version number as a string. 101 */ 102 public static String version() { 103 return version("release"); // mm.nn.oo[-milestone] 104 } 105 106 /** The current full version number as a string. 107 */ 108 public static String fullVersion() { 109 return version("full"); // mm.mm.oo[-milestone]-build 110 } 111 112 private static final String versionRBName = "com.sun.tools.javac.resources.version"; 113 private static ResourceBundle versionRB; 114 115 private static String version(String key) { 116 if (versionRB == null) { 117 try { 118 versionRB = ResourceBundle.getBundle(versionRBName); 119 } catch (MissingResourceException e) { 120 return Log.getLocalizedString("version.not.available"); 121 } 122 } 123 try { 124 return versionRB.getString(key); 125 } 126 catch (MissingResourceException e) { 127 return Log.getLocalizedString("version.not.available"); 128 } 129 } 130 131 /** 132 * Control how the compiler's latter phases (attr, flow, desugar, generate) 133 * are connected. Each individual file is processed by each phase in turn, 134 * but with different compile policies, you can control the order in which 135 * each class is processed through its next phase. 136 * 137 * <p>Generally speaking, the compiler will "fail fast" in the face of 138 * errors, although not aggressively so. flow, desugar, etc become no-ops 139 * once any errors have occurred. No attempt is currently made to determine 140 * if it might be safe to process a class through its next phase because 141 * it does not depend on any unrelated errors that might have occurred. 142 */ 143 protected static enum CompilePolicy { 144 /** 145 * Just attribute the parse trees. 146 */ 147 ATTR_ONLY, 148 149 /** 150 * Just attribute and do flow analysis on the parse trees. 151 * This should catch most user errors. 152 */ 153 CHECK_ONLY, 154 155 /** 156 * Attribute everything, then do flow analysis for everything, 157 * then desugar everything, and only then generate output. 158 * This means no output will be generated if there are any 159 * errors in any classes. 160 */ 161 SIMPLE, 162 163 /** 164 * Groups the classes for each source file together, then process 165 * each group in a manner equivalent to the {@code SIMPLE} policy. 166 * This means no output will be generated if there are any 167 * errors in any of the classes in a source file. 168 */ 169 BY_FILE, 170 171 /** 172 * Completely process each entry on the todo list in turn. 173 * -- this is the same for 1.5. 174 * Means output might be generated for some classes in a compilation unit 175 * and not others. 176 */ 177 BY_TODO; 178 179 static CompilePolicy decode(String option) { 180 if (option == null) 181 return DEFAULT_COMPILE_POLICY; 182 else if (option.equals("attr")) 183 return ATTR_ONLY; 184 else if (option.equals("check")) 185 return CHECK_ONLY; 186 else if (option.equals("simple")) 187 return SIMPLE; 188 else if (option.equals("byfile")) 189 return BY_FILE; 190 else if (option.equals("bytodo")) 191 return BY_TODO; 192 else 193 return DEFAULT_COMPILE_POLICY; 194 } 195 } 196 197 private static final CompilePolicy DEFAULT_COMPILE_POLICY = CompilePolicy.BY_TODO; 198 199 protected static enum ImplicitSourcePolicy { 200 /** Don't generate or process implicitly read source files. */ 201 NONE, 202 /** Generate classes for implicitly read source files. */ 203 CLASS, 204 /** Like CLASS, but generate warnings if annotation processing occurs */ 205 UNSET; 206 207 static ImplicitSourcePolicy decode(String option) { 208 if (option == null) 209 return UNSET; 210 else if (option.equals("none")) 211 return NONE; 212 else if (option.equals("class")) 213 return CLASS; 214 else 215 return UNSET; 216 } 217 } 218 219 /** The log to be used for error reporting. 220 */ 221 public Log log; 222 223 /** Factory for creating diagnostic objects 224 */ 225 JCDiagnostic.Factory diagFactory; 226 227 /** The tree factory module. 228 */ 229 protected TreeMaker make; 230 231 /** The class finder. 232 */ 233 protected ClassFinder finder; 234 235 /** The class reader. 236 */ 237 protected ClassReader reader; 238 239 /** The class writer. 240 */ 241 protected ClassWriter writer; 242 243 /** The native header writer. 244 */ 245 protected JNIWriter jniWriter; 246 247 /** The module for the symbol table entry phases. 248 */ 249 protected Enter enter; 250 251 /** The symbol table. 252 */ 253 protected Symtab syms; 254 255 /** The language version. 256 */ 257 protected Source source; 258 259 /** The module for code generation. 260 */ 261 protected Gen gen; 262 263 /** The name table. 264 */ 265 protected Names names; 266 267 /** The attributor. 268 */ 269 protected Attr attr; 270 271 /** The attributor. 272 */ 273 protected Check chk; 274 275 /** The flow analyzer. 276 */ 277 protected Flow flow; 278 279 /** The type eraser. 280 */ 281 protected TransTypes transTypes; 282 283 /** The syntactic sugar desweetener. 284 */ 285 protected Lower lower; 286 287 /** The annotation annotator. 288 */ 289 protected Annotate annotate; 290 291 /** Force a completion failure on this name 292 */ 293 protected final Name completionFailureName; 294 295 /** Type utilities. 296 */ 297 protected Types types; 298 299 /** Access to file objects. 300 */ 301 protected JavaFileManager fileManager; 302 303 /** Factory for parsers. 304 */ 305 protected ParserFactory parserFactory; 306 307 /** Broadcasting listener for progress events 308 */ 309 protected MultiTaskListener taskListener; 310 311 /** 312 * SourceCompleter that delegates to the readSourceFile method of this class. 313 */ 314 protected final Symbol.Completer sourceCompleter = 315 new Symbol.Completer() { 316 @Override 317 public void complete(Symbol sym) throws CompletionFailure { 318 readSourceFile((ClassSymbol) sym); 319 } 320 }; 321 322 /** 323 * Command line options. 324 */ 325 protected Options options; 326 327 protected Context context; 328 329 /** 330 * Flag set if any annotation processing occurred. 331 **/ 332 protected boolean annotationProcessingOccurred; 333 334 /** 335 * Flag set if any implicit source files read. 336 **/ 337 protected boolean implicitSourceFilesRead; 338 339 protected CompileStates compileStates; 340 341 /** Construct a new compiler using a shared context. 342 */ 343 public JavaCompiler(Context context) { 344 this.context = context; 345 context.put(compilerKey, this); 346 347 // if fileManager not already set, register the JavacFileManager to be used 348 if (context.get(JavaFileManager.class) == null) 349 JavacFileManager.preRegister(context); 350 351 names = Names.instance(context); 352 log = Log.instance(context); 353 diagFactory = JCDiagnostic.Factory.instance(context); 354 finder = ClassFinder.instance(context); 355 reader = ClassReader.instance(context); 356 make = TreeMaker.instance(context); 357 writer = ClassWriter.instance(context); 358 jniWriter = JNIWriter.instance(context); 359 enter = Enter.instance(context); 360 todo = Todo.instance(context); 361 362 fileManager = context.get(JavaFileManager.class); 363 parserFactory = ParserFactory.instance(context); 364 compileStates = CompileStates.instance(context); 365 366 try { 367 // catch completion problems with predefineds 368 syms = Symtab.instance(context); 369 } catch (CompletionFailure ex) { 370 // inlined Check.completionError as it is not initialized yet 371 log.error("cant.access", ex.sym, ex.getDetailValue()); 372 if (ex instanceof ClassFinder.BadClassFile) 373 throw new Abort(); 374 } 375 source = Source.instance(context); 376 Target target = Target.instance(context); 377 attr = Attr.instance(context); 378 chk = Check.instance(context); 379 gen = Gen.instance(context); 380 flow = Flow.instance(context); 381 transTypes = TransTypes.instance(context); 382 lower = Lower.instance(context); 383 annotate = Annotate.instance(context); 384 types = Types.instance(context); 385 taskListener = MultiTaskListener.instance(context); 386 387 finder.sourceCompleter = sourceCompleter; 388 389 options = Options.instance(context); 390 391 verbose = options.isSet(VERBOSE); 392 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s 393 stubOutput = options.isSet("-stubs"); 394 relax = options.isSet("-relax"); 395 printFlat = options.isSet("-printflat"); 396 attrParseOnly = options.isSet("-attrparseonly"); 397 encoding = options.get(ENCODING); 398 lineDebugInfo = options.isUnset(G_CUSTOM) || 399 options.isSet(G_CUSTOM, "lines"); 400 genEndPos = options.isSet(XJCOV) || 401 context.get(DiagnosticListener.class) != null; 402 devVerbose = options.isSet("dev"); 403 processPcks = options.isSet("process.packages"); 404 werror = options.isSet(WERROR); 405 406 verboseCompilePolicy = options.isSet("verboseCompilePolicy"); 407 408 if (attrParseOnly) 409 compilePolicy = CompilePolicy.ATTR_ONLY; 410 else 411 compilePolicy = CompilePolicy.decode(options.get("compilePolicy")); 412 413 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit")); 414 415 completionFailureName = 416 options.isSet("failcomplete") 417 ? names.fromString(options.get("failcomplete")) 418 : null; 419 420 shouldStopPolicyIfError = 421 options.isSet("shouldStopPolicy") // backwards compatible 422 ? CompileState.valueOf(options.get("shouldStopPolicy")) 423 : options.isSet("shouldStopPolicyIfError") 424 ? CompileState.valueOf(options.get("shouldStopPolicyIfError")) 425 : CompileState.INIT; 426 shouldStopPolicyIfNoError = 427 options.isSet("shouldStopPolicyIfNoError") 428 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError")) 429 : CompileState.GENERATE; 430 431 if (options.isUnset("oldDiags")) 432 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context)); 433 434 PlatformDescription platformProvider = context.get(PlatformDescription.class); 435 436 if (platformProvider != null) 437 closeables = closeables.prepend(platformProvider); 438 } 439 440 /* Switches: 441 */ 442 443 /** Verbose output. 444 */ 445 public boolean verbose; 446 447 /** Emit plain Java source files rather than class files. 448 */ 449 public boolean sourceOutput; 450 451 /** Emit stub source files rather than class files. 452 */ 453 public boolean stubOutput; 454 455 /** Generate attributed parse tree only. 456 */ 457 public boolean attrParseOnly; 458 459 /** Switch: relax some constraints for producing the jsr14 prototype. 460 */ 461 boolean relax; 462 463 /** Debug switch: Emit Java sources after inner class flattening. 464 */ 465 public boolean printFlat; 466 467 /** The encoding to be used for source input. 468 */ 469 public String encoding; 470 471 /** Generate code with the LineNumberTable attribute for debugging 472 */ 473 public boolean lineDebugInfo; 474 475 /** Switch: should we store the ending positions? 476 */ 477 public boolean genEndPos; 478 479 /** Switch: should we debug ignored exceptions 480 */ 481 protected boolean devVerbose; 482 483 /** Switch: should we (annotation) process packages as well 484 */ 485 protected boolean processPcks; 486 487 /** Switch: treat warnings as errors 488 */ 489 protected boolean werror; 490 491 /** Switch: is annotation processing requested explicitly via 492 * CompilationTask.setProcessors? 493 */ 494 protected boolean explicitAnnotationProcessingRequested = false; 495 496 /** 497 * The policy for the order in which to perform the compilation 498 */ 499 protected CompilePolicy compilePolicy; 500 501 /** 502 * The policy for what to do with implicitly read source files 503 */ 504 protected ImplicitSourcePolicy implicitSourcePolicy; 505 506 /** 507 * Report activity related to compilePolicy 508 */ 509 public boolean verboseCompilePolicy; 510 511 /** 512 * Policy of how far to continue compilation after errors have occurred. 513 * Set this to minimum CompileState (INIT) to stop as soon as possible 514 * after errors. 515 */ 516 public CompileState shouldStopPolicyIfError; 517 518 /** 519 * Policy of how far to continue compilation when no errors have occurred. 520 * Set this to maximum CompileState (GENERATE) to perform full compilation. 521 * Set this lower to perform partial compilation, such as -proc:only. 522 */ 523 public CompileState shouldStopPolicyIfNoError; 524 525 /** A queue of all as yet unattributed classes. 526 */ 527 public Todo todo; 528 529 /** A list of items to be closed when the compilation is complete. 530 */ 531 public List<Closeable> closeables = List.nil(); 532 533 /** The set of currently compiled inputfiles, needed to ensure 534 * we don't accidentally overwrite an input file when -s is set. 535 * initialized by `compile'. 536 */ 537 protected Set<JavaFileObject> inputFiles = new HashSet<>(); 538 539 protected boolean shouldStop(CompileState cs) { 540 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError()) 541 ? shouldStopPolicyIfError 542 : shouldStopPolicyIfNoError; 543 return cs.isAfter(shouldStopPolicy); 544 } 545 546 /** The number of errors reported so far. 547 */ 548 public int errorCount() { 549 if (werror && log.nerrors == 0 && log.nwarnings > 0) { 550 log.error("warnings.and.werror"); 551 } 552 return log.nerrors; 553 } 554 555 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) { 556 return shouldStop(cs) ? new ListBuffer<T>() : queue; 557 } 558 559 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) { 560 return shouldStop(cs) ? List.<T>nil() : list; 561 } 562 563 /** The number of warnings reported so far. 564 */ 565 public int warningCount() { 566 return log.nwarnings; 567 } 568 569 /** Try to open input stream with given name. 570 * Report an error if this fails. 571 * @param filename The file name of the input stream to be opened. 572 */ 573 public CharSequence readSource(JavaFileObject filename) { 574 try { 575 inputFiles.add(filename); 576 return filename.getCharContent(false); 577 } catch (IOException e) { 578 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 579 return null; 580 } 581 } 582 583 /** Parse contents of input stream. 584 * @param filename The name of the file from which input stream comes. 585 * @param content The characters to be parsed. 586 */ 587 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) { 588 long msec = now(); 589 JCCompilationUnit tree = make.TopLevel(List.<JCTree>nil()); 590 if (content != null) { 591 if (verbose) { 592 log.printVerbose("parsing.started", filename); 593 } 594 if (!taskListener.isEmpty()) { 595 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename); 596 taskListener.started(e); 597 keepComments = true; 598 genEndPos = true; 599 } 600 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo); 601 tree = parser.parseCompilationUnit(); 602 if (verbose) { 603 log.printVerbose("parsing.done", Long.toString(elapsed(msec))); 604 } 605 } 606 607 tree.sourcefile = filename; 608 609 if (content != null && !taskListener.isEmpty()) { 610 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree); 611 taskListener.finished(e); 612 } 613 614 return tree; 615 } 616 // where 617 public boolean keepComments = false; 618 protected boolean keepComments() { 619 return keepComments || sourceOutput || stubOutput; 620 } 621 622 623 /** Parse contents of file. 624 * @param filename The name of the file to be parsed. 625 */ 626 @Deprecated 627 public JCTree.JCCompilationUnit parse(String filename) { 628 JavacFileManager fm = (JavacFileManager)fileManager; 629 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next()); 630 } 631 632 /** Parse contents of file. 633 * @param filename The name of the file to be parsed. 634 */ 635 public JCTree.JCCompilationUnit parse(JavaFileObject filename) { 636 JavaFileObject prev = log.useSource(filename); 637 try { 638 JCTree.JCCompilationUnit t = parse(filename, readSource(filename)); 639 if (t.endPositions != null) 640 log.setEndPosTable(filename, t.endPositions); 641 return t; 642 } finally { 643 log.useSource(prev); 644 } 645 } 646 647 /** Resolve an identifier which may be the binary name of a class or 648 * the Java name of a class or package. 649 * @param name The name to resolve 650 */ 651 public Symbol resolveBinaryNameOrIdent(String name) { 652 try { 653 Name flatname = names.fromString(name.replace("/", ".")); 654 return finder.loadClass(flatname); 655 } catch (CompletionFailure ignore) { 656 return resolveIdent(name); 657 } 658 } 659 660 /** Resolve an identifier. 661 * @param name The identifier to resolve 662 */ 663 public Symbol resolveIdent(String name) { 664 if (name.equals("")) 665 return syms.errSymbol; 666 JavaFileObject prev = log.useSource(null); 667 try { 668 JCExpression tree = null; 669 for (String s : name.split("\\.", -1)) { 670 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords 671 return syms.errSymbol; 672 tree = (tree == null) ? make.Ident(names.fromString(s)) 673 : make.Select(tree, names.fromString(s)); 674 } 675 JCCompilationUnit toplevel = 676 make.TopLevel(List.<JCTree>nil()); 677 toplevel.packge = syms.unnamedPackage; 678 return attr.attribIdent(tree, toplevel); 679 } finally { 680 log.useSource(prev); 681 } 682 } 683 684 /** Emit plain Java source for a class. 685 * @param env The attribution environment of the outermost class 686 * containing this class. 687 * @param cdef The class definition to be printed. 688 */ 689 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 690 JavaFileObject outFile 691 = fileManager.getJavaFileForOutput(CLASS_OUTPUT, 692 cdef.sym.flatname.toString(), 693 JavaFileObject.Kind.SOURCE, 694 null); 695 if (inputFiles.contains(outFile)) { 696 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile); 697 return null; 698 } else { 699 try (BufferedWriter out = new BufferedWriter(outFile.openWriter())) { 700 new Pretty(out, true).printUnit(env.toplevel, cdef); 701 if (verbose) 702 log.printVerbose("wrote.file", outFile); 703 } 704 return outFile; 705 } 706 } 707 708 /** Generate code and emit a class file for a given class 709 * @param env The attribution environment of the outermost class 710 * containing this class. 711 * @param cdef The class definition from which code is generated. 712 */ 713 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 714 try { 715 if (gen.genClass(env, cdef) && (errorCount() == 0)) 716 return writer.writeClass(cdef.sym); 717 } catch (ClassWriter.PoolOverflow ex) { 718 log.error(cdef.pos(), "limit.pool"); 719 } catch (ClassWriter.StringOverflow ex) { 720 log.error(cdef.pos(), "limit.string.overflow", 721 ex.value.substring(0, 20)); 722 } catch (CompletionFailure ex) { 723 chk.completionError(cdef.pos(), ex); 724 } 725 return null; 726 } 727 728 /** Compile a source file that has been accessed by the class finder. 729 * @param c The class the source file of which needs to be compiled. 730 */ 731 private void readSourceFile(ClassSymbol c) throws CompletionFailure { 732 readSourceFile(null, c); 733 } 734 735 /** Compile a ClassSymbol from source, optionally using the given compilation unit as 736 * the source tree. 737 * @param tree the compilation unit in which the given ClassSymbol resides, 738 * or null if should be parsed from source 739 * @param c the ClassSymbol to complete 740 */ 741 public void readSourceFile(JCCompilationUnit tree, ClassSymbol c) throws CompletionFailure { 742 if (completionFailureName == c.fullname) { 743 throw new CompletionFailure(c, "user-selected completion failure by class name"); 744 } 745 JavaFileObject filename = c.classfile; 746 JavaFileObject prev = log.useSource(filename); 747 748 if (tree == null) { 749 try { 750 tree = parse(filename, filename.getCharContent(false)); 751 } catch (IOException e) { 752 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 753 tree = make.TopLevel(List.<JCTree>nil()); 754 } finally { 755 log.useSource(prev); 756 } 757 } 758 759 if (!taskListener.isEmpty()) { 760 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 761 taskListener.started(e); 762 } 763 764 enter.complete(List.of(tree), c); 765 766 if (!taskListener.isEmpty()) { 767 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 768 taskListener.finished(e); 769 } 770 771 if (enter.getEnv(c) == null) { 772 boolean isPkgInfo = 773 tree.sourcefile.isNameCompatible("package-info", 774 JavaFileObject.Kind.SOURCE); 775 if (isPkgInfo) { 776 if (enter.getEnv(tree.packge) == null) { 777 JCDiagnostic diag = 778 diagFactory.fragment("file.does.not.contain.package", 779 c.location()); 780 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 781 } 782 } else { 783 JCDiagnostic diag = 784 diagFactory.fragment("file.doesnt.contain.class", 785 c.getQualifiedName()); 786 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 787 } 788 } 789 790 implicitSourceFilesRead = true; 791 } 792 793 /** Track when the JavaCompiler has been used to compile something. */ 794 private boolean hasBeenUsed = false; 795 private long start_msec = 0; 796 public long elapsed_msec = 0; 797 798 public void compile(List<JavaFileObject> sourceFileObject) 799 throws Throwable { 800 compile(sourceFileObject, List.<String>nil(), null); 801 } 802 803 /** 804 * Main method: compile a list of files, return all compiled classes 805 * 806 * @param sourceFileObjects file objects to be compiled 807 * @param classnames class names to process for annotations 808 * @param processors user provided annotation processors to bypass 809 * discovery, {@code null} means that no processors were provided 810 */ 811 public void compile(Collection<JavaFileObject> sourceFileObjects, 812 Collection<String> classnames, 813 Iterable<? extends Processor> processors) 814 { 815 if (!taskListener.isEmpty()) { 816 taskListener.started(new TaskEvent(TaskEvent.Kind.COMPILATION)); 817 } 818 819 if (processors != null && processors.iterator().hasNext()) 820 explicitAnnotationProcessingRequested = true; 821 // as a JavaCompiler can only be used once, throw an exception if 822 // it has been used before. 823 if (hasBeenUsed) 824 throw new AssertionError("attempt to reuse JavaCompiler"); 825 hasBeenUsed = true; 826 827 // forcibly set the equivalent of -Xlint:-options, so that no further 828 // warnings about command line options are generated from this point on 829 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true"); 830 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option); 831 832 start_msec = now(); 833 834 try { 835 initProcessAnnotations(processors); 836 837 // These method calls must be chained to avoid memory leaks 838 processAnnotations( 839 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))), 840 classnames); 841 842 // If it's safe to do so, skip attr / flow / gen for implicit classes 843 if (taskListener.isEmpty() && 844 implicitSourcePolicy == ImplicitSourcePolicy.NONE) { 845 todo.retainFiles(inputFiles); 846 } 847 848 switch (compilePolicy) { 849 case ATTR_ONLY: 850 attribute(todo); 851 break; 852 853 case CHECK_ONLY: 854 flow(attribute(todo)); 855 break; 856 857 case SIMPLE: 858 generate(desugar(flow(attribute(todo)))); 859 break; 860 861 case BY_FILE: { 862 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile(); 863 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) { 864 generate(desugar(flow(attribute(q.remove())))); 865 } 866 } 867 break; 868 869 case BY_TODO: 870 while (!todo.isEmpty()) 871 generate(desugar(flow(attribute(todo.remove())))); 872 break; 873 874 default: 875 Assert.error("unknown compile policy"); 876 } 877 } catch (Abort ex) { 878 if (devVerbose) 879 ex.printStackTrace(System.err); 880 } finally { 881 if (verbose) { 882 elapsed_msec = elapsed(start_msec); 883 log.printVerbose("total", Long.toString(elapsed_msec)); 884 } 885 886 reportDeferredDiagnostics(); 887 888 if (!log.hasDiagnosticListener()) { 889 printCount("error", errorCount()); 890 printCount("warn", warningCount()); 891 } 892 if (!taskListener.isEmpty()) { 893 taskListener.finished(new TaskEvent(TaskEvent.Kind.COMPILATION)); 894 } 895 close(); 896 if (procEnvImpl != null) 897 procEnvImpl.close(); 898 } 899 } 900 901 /** 902 * Set needRootClasses to true, in JavaCompiler subclass constructor 903 * that want to collect public apis of classes supplied on the command line. 904 */ 905 protected boolean needRootClasses = false; 906 907 /** 908 * The list of classes explicitly supplied on the command line for compilation. 909 * Not always populated. 910 */ 911 private List<JCClassDecl> rootClasses; 912 913 /** 914 * Parses a list of files. 915 */ 916 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) { 917 if (shouldStop(CompileState.PARSE)) 918 return List.nil(); 919 920 //parse all files 921 ListBuffer<JCCompilationUnit> trees = new ListBuffer<>(); 922 Set<JavaFileObject> filesSoFar = new HashSet<>(); 923 for (JavaFileObject fileObject : fileObjects) { 924 if (!filesSoFar.contains(fileObject)) { 925 filesSoFar.add(fileObject); 926 trees.append(parse(fileObject)); 927 } 928 } 929 return trees.toList(); 930 } 931 932 /** 933 * Enter the symbols found in a list of parse trees if the compilation 934 * is expected to proceed beyond anno processing into attr. 935 * As a side-effect, this puts elements on the "todo" list. 936 * Also stores a list of all top level classes in rootClasses. 937 */ 938 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) { 939 if (shouldStop(CompileState.ATTR)) 940 return List.nil(); 941 return enterTrees(roots); 942 } 943 944 /** 945 * Enter the symbols found in a list of parse trees. 946 * As a side-effect, this puts elements on the "todo" list. 947 * Also stores a list of all top level classes in rootClasses. 948 */ 949 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) { 950 //enter symbols for all files 951 if (!taskListener.isEmpty()) { 952 for (JCCompilationUnit unit: roots) { 953 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 954 taskListener.started(e); 955 } 956 } 957 958 enter.main(roots); 959 960 if (!taskListener.isEmpty()) { 961 for (JCCompilationUnit unit: roots) { 962 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 963 taskListener.finished(e); 964 } 965 } 966 967 // If generating source, or if tracking public apis, 968 // then remember the classes declared in 969 // the original compilation units listed on the command line. 970 if (needRootClasses || sourceOutput || stubOutput) { 971 ListBuffer<JCClassDecl> cdefs = new ListBuffer<>(); 972 for (JCCompilationUnit unit : roots) { 973 for (List<JCTree> defs = unit.defs; 974 defs.nonEmpty(); 975 defs = defs.tail) { 976 if (defs.head instanceof JCClassDecl) 977 cdefs.append((JCClassDecl)defs.head); 978 } 979 } 980 rootClasses = cdefs.toList(); 981 } 982 983 // Ensure the input files have been recorded. Although this is normally 984 // done by readSource, it may not have been done if the trees were read 985 // in a prior round of annotation processing, and the trees have been 986 // cleaned and are being reused. 987 for (JCCompilationUnit unit : roots) { 988 inputFiles.add(unit.sourcefile); 989 } 990 991 return roots; 992 } 993 994 /** 995 * Set to true to enable skeleton annotation processing code. 996 * Currently, we assume this variable will be replaced more 997 * advanced logic to figure out if annotation processing is 998 * needed. 999 */ 1000 boolean processAnnotations = false; 1001 1002 Log.DeferredDiagnosticHandler deferredDiagnosticHandler; 1003 1004 /** 1005 * Object to handle annotation processing. 1006 */ 1007 private JavacProcessingEnvironment procEnvImpl = null; 1008 1009 /** 1010 * Check if we should process annotations. 1011 * If so, and if no scanner is yet registered, then set up the DocCommentScanner 1012 * to catch doc comments, and set keepComments so the parser records them in 1013 * the compilation unit. 1014 * 1015 * @param processors user provided annotation processors to bypass 1016 * discovery, {@code null} means that no processors were provided 1017 */ 1018 public void initProcessAnnotations(Iterable<? extends Processor> processors) { 1019 // Process annotations if processing is not disabled and there 1020 // is at least one Processor available. 1021 if (options.isSet(PROC, "none")) { 1022 processAnnotations = false; 1023 } else if (procEnvImpl == null) { 1024 procEnvImpl = JavacProcessingEnvironment.instance(context); 1025 procEnvImpl.setProcessors(processors); 1026 processAnnotations = procEnvImpl.atLeastOneProcessor(); 1027 1028 if (processAnnotations) { 1029 options.put("save-parameter-names", "save-parameter-names"); 1030 reader.saveParameterNames = true; 1031 keepComments = true; 1032 genEndPos = true; 1033 if (!taskListener.isEmpty()) 1034 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING)); 1035 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log); 1036 } else { // free resources 1037 procEnvImpl.close(); 1038 } 1039 } 1040 } 1041 1042 // TODO: called by JavacTaskImpl 1043 public void processAnnotations(List<JCCompilationUnit> roots) { 1044 processAnnotations(roots, List.<String>nil()); 1045 } 1046 1047 /** 1048 * Process any annotations found in the specified compilation units. 1049 * @param roots a list of compilation units 1050 */ 1051 // Implementation note: when this method is called, log.deferredDiagnostics 1052 // will have been set true by initProcessAnnotations, meaning that any diagnostics 1053 // that are reported will go into the log.deferredDiagnostics queue. 1054 // By the time this method exits, log.deferDiagnostics must be set back to false, 1055 // and all deferredDiagnostics must have been handled: i.e. either reported 1056 // or determined to be transient, and therefore suppressed. 1057 public void processAnnotations(List<JCCompilationUnit> roots, 1058 Collection<String> classnames) { 1059 if (shouldStop(CompileState.PROCESS)) { 1060 // Errors were encountered. 1061 // Unless all the errors are resolve errors, the errors were parse errors 1062 // or other errors during enter which cannot be fixed by running 1063 // any annotation processors. 1064 if (unrecoverableError()) { 1065 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1066 log.popDiagnosticHandler(deferredDiagnosticHandler); 1067 return ; 1068 } 1069 } 1070 1071 // ASSERT: processAnnotations and procEnvImpl should have been set up by 1072 // by initProcessAnnotations 1073 1074 // NOTE: The !classnames.isEmpty() checks should be refactored to Main. 1075 1076 if (!processAnnotations) { 1077 // If there are no annotation processors present, and 1078 // annotation processing is to occur with compilation, 1079 // emit a warning. 1080 if (options.isSet(PROC, "only")) { 1081 log.warning("proc.proc-only.requested.no.procs"); 1082 todo.clear(); 1083 } 1084 // If not processing annotations, classnames must be empty 1085 if (!classnames.isEmpty()) { 1086 log.error("proc.no.explicit.annotation.processing.requested", 1087 classnames); 1088 } 1089 Assert.checkNull(deferredDiagnosticHandler); 1090 return ; // continue regular compilation 1091 } 1092 1093 Assert.checkNonNull(deferredDiagnosticHandler); 1094 1095 try { 1096 List<ClassSymbol> classSymbols = List.nil(); 1097 List<PackageSymbol> pckSymbols = List.nil(); 1098 if (!classnames.isEmpty()) { 1099 // Check for explicit request for annotation 1100 // processing 1101 if (!explicitAnnotationProcessingRequested()) { 1102 log.error("proc.no.explicit.annotation.processing.requested", 1103 classnames); 1104 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1105 log.popDiagnosticHandler(deferredDiagnosticHandler); 1106 return ; // TODO: Will this halt compilation? 1107 } else { 1108 boolean errors = false; 1109 for (String nameStr : classnames) { 1110 Symbol sym = resolveBinaryNameOrIdent(nameStr); 1111 if (sym == null || 1112 (sym.kind == PCK && !processPcks) || 1113 sym.kind == ABSENT_TYP) { 1114 log.error("proc.cant.find.class", nameStr); 1115 errors = true; 1116 continue; 1117 } 1118 try { 1119 if (sym.kind == PCK) 1120 sym.complete(); 1121 if (sym.exists()) { 1122 if (sym.kind == PCK) 1123 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1124 else 1125 classSymbols = classSymbols.prepend((ClassSymbol)sym); 1126 continue; 1127 } 1128 Assert.check(sym.kind == PCK); 1129 log.warning("proc.package.does.not.exist", nameStr); 1130 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1131 } catch (CompletionFailure e) { 1132 log.error("proc.cant.find.class", nameStr); 1133 errors = true; 1134 continue; 1135 } 1136 } 1137 if (errors) { 1138 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1139 log.popDiagnosticHandler(deferredDiagnosticHandler); 1140 return ; 1141 } 1142 } 1143 } 1144 try { 1145 annotationProcessingOccurred = 1146 procEnvImpl.doProcessing(roots, 1147 classSymbols, 1148 pckSymbols, 1149 deferredDiagnosticHandler); 1150 // doProcessing will have handled deferred diagnostics 1151 } finally { 1152 procEnvImpl.close(); 1153 } 1154 } catch (CompletionFailure ex) { 1155 log.error("cant.access", ex.sym, ex.getDetailValue()); 1156 if (deferredDiagnosticHandler != null) { 1157 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1158 log.popDiagnosticHandler(deferredDiagnosticHandler); 1159 } 1160 } 1161 } 1162 1163 private boolean unrecoverableError() { 1164 if (deferredDiagnosticHandler != null) { 1165 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) { 1166 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE)) 1167 return true; 1168 } 1169 } 1170 return false; 1171 } 1172 1173 boolean explicitAnnotationProcessingRequested() { 1174 return 1175 explicitAnnotationProcessingRequested || 1176 explicitAnnotationProcessingRequested(options); 1177 } 1178 1179 static boolean explicitAnnotationProcessingRequested(Options options) { 1180 return 1181 options.isSet(PROCESSOR) || 1182 options.isSet(PROCESSORPATH) || 1183 options.isSet(PROC, "only") || 1184 options.isSet(XPRINT); 1185 } 1186 1187 public void setDeferredDiagnosticHandler(Log.DeferredDiagnosticHandler deferredDiagnosticHandler) { 1188 this.deferredDiagnosticHandler = deferredDiagnosticHandler; 1189 } 1190 1191 /** 1192 * Attribute a list of parse trees, such as found on the "todo" list. 1193 * Note that attributing classes may cause additional files to be 1194 * parsed and entered via the SourceCompleter. 1195 * Attribution of the entries in the list does not stop if any errors occur. 1196 * @return a list of environments for attribute classes. 1197 */ 1198 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) { 1199 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1200 while (!envs.isEmpty()) 1201 results.append(attribute(envs.remove())); 1202 return stopIfError(CompileState.ATTR, results); 1203 } 1204 1205 /** 1206 * Attribute a parse tree. 1207 * @return the attributed parse tree 1208 */ 1209 public Env<AttrContext> attribute(Env<AttrContext> env) { 1210 if (compileStates.isDone(env, CompileState.ATTR)) 1211 return env; 1212 1213 if (verboseCompilePolicy) 1214 printNote("[attribute " + env.enclClass.sym + "]"); 1215 if (verbose) 1216 log.printVerbose("checking.attribution", env.enclClass.sym); 1217 1218 if (!taskListener.isEmpty()) { 1219 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1220 taskListener.started(e); 1221 } 1222 1223 JavaFileObject prev = log.useSource( 1224 env.enclClass.sym.sourcefile != null ? 1225 env.enclClass.sym.sourcefile : 1226 env.toplevel.sourcefile); 1227 try { 1228 attr.attrib(env); 1229 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) { 1230 //if in fail-over mode, ensure that AST expression nodes 1231 //are correctly initialized (e.g. they have a type/symbol) 1232 attr.postAttr(env.tree); 1233 } 1234 compileStates.put(env, CompileState.ATTR); 1235 } 1236 finally { 1237 log.useSource(prev); 1238 } 1239 1240 return env; 1241 } 1242 1243 /** 1244 * Perform dataflow checks on attributed parse trees. 1245 * These include checks for definite assignment and unreachable statements. 1246 * If any errors occur, an empty list will be returned. 1247 * @return the list of attributed parse trees 1248 */ 1249 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) { 1250 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1251 for (Env<AttrContext> env: envs) { 1252 flow(env, results); 1253 } 1254 return stopIfError(CompileState.FLOW, results); 1255 } 1256 1257 /** 1258 * Perform dataflow checks on an attributed parse tree. 1259 */ 1260 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) { 1261 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1262 flow(env, results); 1263 return stopIfError(CompileState.FLOW, results); 1264 } 1265 1266 /** 1267 * Perform dataflow checks on an attributed parse tree. 1268 */ 1269 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) { 1270 if (compileStates.isDone(env, CompileState.FLOW)) { 1271 results.add(env); 1272 return; 1273 } 1274 1275 try { 1276 if (shouldStop(CompileState.FLOW)) 1277 return; 1278 1279 if (relax) { 1280 results.add(env); 1281 return; 1282 } 1283 1284 if (verboseCompilePolicy) 1285 printNote("[flow " + env.enclClass.sym + "]"); 1286 JavaFileObject prev = log.useSource( 1287 env.enclClass.sym.sourcefile != null ? 1288 env.enclClass.sym.sourcefile : 1289 env.toplevel.sourcefile); 1290 try { 1291 make.at(Position.FIRSTPOS); 1292 TreeMaker localMake = make.forToplevel(env.toplevel); 1293 flow.analyzeTree(env, localMake); 1294 compileStates.put(env, CompileState.FLOW); 1295 1296 if (shouldStop(CompileState.FLOW)) 1297 return; 1298 1299 results.add(env); 1300 } 1301 finally { 1302 log.useSource(prev); 1303 } 1304 } 1305 finally { 1306 if (!taskListener.isEmpty()) { 1307 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1308 taskListener.finished(e); 1309 } 1310 } 1311 } 1312 1313 /** 1314 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1315 * for source or code generation. 1316 * If any errors occur, an empty list will be returned. 1317 * @return a list containing the classes to be generated 1318 */ 1319 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) { 1320 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = new ListBuffer<>(); 1321 for (Env<AttrContext> env: envs) 1322 desugar(env, results); 1323 return stopIfError(CompileState.FLOW, results); 1324 } 1325 1326 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs = new HashMap<>(); 1327 1328 /** 1329 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1330 * for source or code generation. If the file was not listed on the command line, 1331 * the current implicitSourcePolicy is taken into account. 1332 * The preparation stops as soon as an error is found. 1333 */ 1334 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) { 1335 if (shouldStop(CompileState.TRANSTYPES)) 1336 return; 1337 1338 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE 1339 && !inputFiles.contains(env.toplevel.sourcefile)) { 1340 return; 1341 } 1342 1343 if (compileStates.isDone(env, CompileState.LOWER)) { 1344 results.addAll(desugaredEnvs.get(env)); 1345 return; 1346 } 1347 1348 /** 1349 * Ensure that superclasses of C are desugared before C itself. This is 1350 * required for two reasons: (i) as erasure (TransTypes) destroys 1351 * information needed in flow analysis and (ii) as some checks carried 1352 * out during lowering require that all synthetic fields/methods have 1353 * already been added to C and its superclasses. 1354 */ 1355 class ScanNested extends TreeScanner { 1356 Set<Env<AttrContext>> dependencies = new LinkedHashSet<>(); 1357 protected boolean hasLambdas; 1358 @Override 1359 public void visitClassDef(JCClassDecl node) { 1360 Type st = types.supertype(node.sym.type); 1361 boolean envForSuperTypeFound = false; 1362 while (!envForSuperTypeFound && st.hasTag(CLASS)) { 1363 ClassSymbol c = st.tsym.outermostClass(); 1364 Env<AttrContext> stEnv = enter.getEnv(c); 1365 if (stEnv != null && env != stEnv) { 1366 if (dependencies.add(stEnv)) { 1367 boolean prevHasLambdas = hasLambdas; 1368 try { 1369 scan(stEnv.tree); 1370 } finally { 1371 /* 1372 * ignore any updates to hasLambdas made during 1373 * the nested scan, this ensures an initalized 1374 * LambdaToMethod is available only to those 1375 * classes that contain lambdas 1376 */ 1377 hasLambdas = prevHasLambdas; 1378 } 1379 } 1380 envForSuperTypeFound = true; 1381 } 1382 st = types.supertype(st); 1383 } 1384 super.visitClassDef(node); 1385 } 1386 @Override 1387 public void visitLambda(JCLambda tree) { 1388 hasLambdas = true; 1389 super.visitLambda(tree); 1390 } 1391 @Override 1392 public void visitReference(JCMemberReference tree) { 1393 hasLambdas = true; 1394 super.visitReference(tree); 1395 } 1396 } 1397 ScanNested scanner = new ScanNested(); 1398 scanner.scan(env.tree); 1399 for (Env<AttrContext> dep: scanner.dependencies) { 1400 if (!compileStates.isDone(dep, CompileState.FLOW)) 1401 desugaredEnvs.put(dep, desugar(flow(attribute(dep)))); 1402 } 1403 1404 //We need to check for error another time as more classes might 1405 //have been attributed and analyzed at this stage 1406 if (shouldStop(CompileState.TRANSTYPES)) 1407 return; 1408 1409 if (verboseCompilePolicy) 1410 printNote("[desugar " + env.enclClass.sym + "]"); 1411 1412 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1413 env.enclClass.sym.sourcefile : 1414 env.toplevel.sourcefile); 1415 try { 1416 //save tree prior to rewriting 1417 JCTree untranslated = env.tree; 1418 1419 make.at(Position.FIRSTPOS); 1420 TreeMaker localMake = make.forToplevel(env.toplevel); 1421 1422 if (env.tree.hasTag(JCTree.Tag.PACKAGEDEF)) { 1423 if (!(stubOutput || sourceOutput || printFlat)) { 1424 if (shouldStop(CompileState.LOWER)) 1425 return; 1426 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake); 1427 if (pdef.head != null) { 1428 Assert.check(pdef.tail.isEmpty()); 1429 results.add(new Pair<>(env, (JCClassDecl)pdef.head)); 1430 } 1431 } 1432 return; 1433 } 1434 1435 if (stubOutput) { 1436 //emit stub Java source file, only for compilation 1437 //units enumerated explicitly on the command line 1438 JCClassDecl cdef = (JCClassDecl)env.tree; 1439 if (untranslated instanceof JCClassDecl && 1440 rootClasses.contains((JCClassDecl)untranslated) && 1441 ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1442 cdef.sym.packge().getQualifiedName() == names.java_lang)) { 1443 results.add(new Pair<>(env, removeMethodBodies(cdef))); 1444 } 1445 return; 1446 } 1447 1448 if (shouldStop(CompileState.TRANSTYPES)) 1449 return; 1450 1451 env.tree = transTypes.translateTopLevelClass(env.tree, localMake); 1452 compileStates.put(env, CompileState.TRANSTYPES); 1453 1454 if (source.allowLambda() && scanner.hasLambdas) { 1455 if (shouldStop(CompileState.UNLAMBDA)) 1456 return; 1457 1458 env.tree = LambdaToMethod.instance(context).translateTopLevelClass(env, env.tree, localMake); 1459 compileStates.put(env, CompileState.UNLAMBDA); 1460 } 1461 1462 if (shouldStop(CompileState.LOWER)) 1463 return; 1464 1465 if (sourceOutput) { 1466 //emit standard Java source file, only for compilation 1467 //units enumerated explicitly on the command line 1468 JCClassDecl cdef = (JCClassDecl)env.tree; 1469 if (untranslated instanceof JCClassDecl && 1470 rootClasses.contains((JCClassDecl)untranslated)) { 1471 results.add(new Pair<>(env, cdef)); 1472 } 1473 return; 1474 } 1475 1476 //translate out inner classes 1477 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake); 1478 compileStates.put(env, CompileState.LOWER); 1479 1480 if (shouldStop(CompileState.LOWER)) 1481 return; 1482 1483 //generate code for each class 1484 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) { 1485 JCClassDecl cdef = (JCClassDecl)l.head; 1486 results.add(new Pair<>(env, cdef)); 1487 } 1488 } 1489 finally { 1490 log.useSource(prev); 1491 } 1492 1493 } 1494 1495 /** Generates the source or class file for a list of classes. 1496 * The decision to generate a source file or a class file is 1497 * based upon the compiler's options. 1498 * Generation stops if an error occurs while writing files. 1499 */ 1500 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) { 1501 generate(queue, null); 1502 } 1503 1504 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) { 1505 if (shouldStop(CompileState.GENERATE)) 1506 return; 1507 1508 boolean usePrintSource = (stubOutput || sourceOutput || printFlat); 1509 1510 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) { 1511 Env<AttrContext> env = x.fst; 1512 JCClassDecl cdef = x.snd; 1513 1514 if (verboseCompilePolicy) { 1515 printNote("[generate " 1516 + (usePrintSource ? " source" : "code") 1517 + " " + cdef.sym + "]"); 1518 } 1519 1520 if (!taskListener.isEmpty()) { 1521 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1522 taskListener.started(e); 1523 } 1524 1525 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1526 env.enclClass.sym.sourcefile : 1527 env.toplevel.sourcefile); 1528 try { 1529 JavaFileObject file; 1530 if (usePrintSource) 1531 file = printSource(env, cdef); 1532 else { 1533 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT) 1534 && jniWriter.needsHeader(cdef.sym)) { 1535 jniWriter.write(cdef.sym); 1536 } 1537 file = genCode(env, cdef); 1538 } 1539 if (results != null && file != null) 1540 results.add(file); 1541 } catch (IOException ex) { 1542 log.error(cdef.pos(), "class.cant.write", 1543 cdef.sym, ex.getMessage()); 1544 return; 1545 } finally { 1546 log.useSource(prev); 1547 } 1548 1549 if (!taskListener.isEmpty()) { 1550 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1551 taskListener.finished(e); 1552 } 1553 } 1554 } 1555 1556 // where 1557 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) { 1558 // use a LinkedHashMap to preserve the order of the original list as much as possible 1559 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<>(); 1560 for (Env<AttrContext> env: envs) { 1561 Queue<Env<AttrContext>> sublist = map.get(env.toplevel); 1562 if (sublist == null) { 1563 sublist = new ListBuffer<>(); 1564 map.put(env.toplevel, sublist); 1565 } 1566 sublist.add(env); 1567 } 1568 return map; 1569 } 1570 1571 JCClassDecl removeMethodBodies(JCClassDecl cdef) { 1572 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0; 1573 class MethodBodyRemover extends TreeTranslator { 1574 @Override 1575 public void visitMethodDef(JCMethodDecl tree) { 1576 tree.mods.flags &= ~Flags.SYNCHRONIZED; 1577 for (JCVariableDecl vd : tree.params) 1578 vd.mods.flags &= ~Flags.FINAL; 1579 tree.body = null; 1580 super.visitMethodDef(tree); 1581 } 1582 @Override 1583 public void visitVarDef(JCVariableDecl tree) { 1584 if (tree.init != null && tree.init.type.constValue() == null) 1585 tree.init = null; 1586 super.visitVarDef(tree); 1587 } 1588 @Override 1589 public void visitClassDef(JCClassDecl tree) { 1590 ListBuffer<JCTree> newdefs = new ListBuffer<>(); 1591 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) { 1592 JCTree t = it.head; 1593 switch (t.getTag()) { 1594 case CLASSDEF: 1595 if (isInterface || 1596 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1597 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1598 newdefs.append(t); 1599 break; 1600 case METHODDEF: 1601 if (isInterface || 1602 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1603 ((JCMethodDecl) t).sym.name == names.init || 1604 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1605 newdefs.append(t); 1606 break; 1607 case VARDEF: 1608 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1609 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1610 newdefs.append(t); 1611 break; 1612 default: 1613 break; 1614 } 1615 } 1616 tree.defs = newdefs.toList(); 1617 super.visitClassDef(tree); 1618 } 1619 } 1620 MethodBodyRemover r = new MethodBodyRemover(); 1621 return r.translate(cdef); 1622 } 1623 1624 public void reportDeferredDiagnostics() { 1625 if (errorCount() == 0 1626 && annotationProcessingOccurred 1627 && implicitSourceFilesRead 1628 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) { 1629 if (explicitAnnotationProcessingRequested()) 1630 log.warning("proc.use.implicit"); 1631 else 1632 log.warning("proc.use.proc.or.implicit"); 1633 } 1634 chk.reportDeferredDiagnostics(); 1635 if (log.compressedOutput) { 1636 log.mandatoryNote(null, "compressed.diags"); 1637 } 1638 } 1639 1640 /** Close the compiler, flushing the logs 1641 */ 1642 public void close() { 1643 rootClasses = null; 1644 finder = null; 1645 reader = null; 1646 make = null; 1647 writer = null; 1648 enter = null; 1649 if (todo != null) 1650 todo.clear(); 1651 todo = null; 1652 parserFactory = null; 1653 syms = null; 1654 source = null; 1655 attr = null; 1656 chk = null; 1657 gen = null; 1658 flow = null; 1659 transTypes = null; 1660 lower = null; 1661 annotate = null; 1662 types = null; 1663 1664 log.flush(); 1665 try { 1666 fileManager.flush(); 1667 } catch (IOException e) { 1668 throw new Abort(e); 1669 } finally { 1670 if (names != null) 1671 names.dispose(); 1672 names = null; 1673 1674 for (Closeable c: closeables) { 1675 try { 1676 c.close(); 1677 } catch (IOException e) { 1678 // When javac uses JDK 7 as a baseline, this code would be 1679 // better written to set any/all exceptions from all the 1680 // Closeables as suppressed exceptions on the FatalError 1681 // that is thrown. 1682 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close"); 1683 throw new FatalError(msg, e); 1684 } 1685 } 1686 closeables = List.nil(); 1687 } 1688 } 1689 1690 protected void printNote(String lines) { 1691 log.printRawLines(Log.WriterKind.NOTICE, lines); 1692 } 1693 1694 /** Print numbers of errors and warnings. 1695 */ 1696 public void printCount(String kind, int count) { 1697 if (count != 0) { 1698 String key; 1699 if (count == 1) 1700 key = "count." + kind; 1701 else 1702 key = "count." + kind + ".plural"; 1703 log.printLines(WriterKind.ERROR, key, String.valueOf(count)); 1704 log.flush(Log.WriterKind.ERROR); 1705 } 1706 } 1707 1708 private static long now() { 1709 return System.currentTimeMillis(); 1710 } 1711 1712 private static long elapsed(long then) { 1713 return now() - then; 1714 } 1715 1716 public void newRound() { 1717 inputFiles.clear(); 1718 todo.clear(); 1719 } 1720} 1721