JavaCompiler.java revision 3257:3cdfbbdb6f61
1/* 2 * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.tools.javac.main; 27 28import java.io.*; 29import java.util.Collection; 30import java.util.HashMap; 31import java.util.HashSet; 32import java.util.LinkedHashMap; 33import java.util.LinkedHashSet; 34import java.util.Map; 35import java.util.MissingResourceException; 36import java.util.Queue; 37import java.util.ResourceBundle; 38import java.util.Set; 39 40import javax.annotation.processing.Processor; 41import javax.lang.model.SourceVersion; 42import javax.tools.DiagnosticListener; 43import javax.tools.JavaFileManager; 44import javax.tools.JavaFileObject; 45import javax.tools.StandardLocation; 46 47import com.sun.source.util.TaskEvent; 48import com.sun.tools.javac.api.MultiTaskListener; 49import com.sun.tools.javac.code.*; 50import com.sun.tools.javac.code.Lint.LintCategory; 51import com.sun.tools.javac.code.Symbol.ClassSymbol; 52import com.sun.tools.javac.code.Symbol.CompletionFailure; 53import com.sun.tools.javac.code.Symbol.PackageSymbol; 54import com.sun.tools.javac.comp.*; 55import com.sun.tools.javac.comp.CompileStates.CompileState; 56import com.sun.tools.javac.file.JavacFileManager; 57import com.sun.tools.javac.jvm.*; 58import com.sun.tools.javac.parser.*; 59import com.sun.tools.javac.platform.PlatformDescription; 60import com.sun.tools.javac.processing.*; 61import com.sun.tools.javac.tree.*; 62import com.sun.tools.javac.tree.JCTree.JCClassDecl; 63import com.sun.tools.javac.tree.JCTree.JCCompilationUnit; 64import com.sun.tools.javac.tree.JCTree.JCExpression; 65import com.sun.tools.javac.tree.JCTree.JCLambda; 66import com.sun.tools.javac.tree.JCTree.JCMemberReference; 67import com.sun.tools.javac.tree.JCTree.JCMethodDecl; 68import com.sun.tools.javac.tree.JCTree.JCVariableDecl; 69import com.sun.tools.javac.util.*; 70import com.sun.tools.javac.util.Log.WriterKind; 71 72import static com.sun.tools.javac.code.Kinds.Kind.*; 73import static com.sun.tools.javac.code.TypeTag.CLASS; 74import static com.sun.tools.javac.main.Option.*; 75import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*; 76import static javax.tools.StandardLocation.CLASS_OUTPUT; 77 78/** This class could be the main entry point for GJC when GJC is used as a 79 * component in a larger software system. It provides operations to 80 * construct a new compiler, and to run a new compiler on a set of source 81 * files. 82 * 83 * <p><b>This is NOT part of any supported API. 84 * If you write code that depends on this, you do so at your own risk. 85 * This code and its internal interfaces are subject to change or 86 * deletion without notice.</b> 87 */ 88public class JavaCompiler { 89 /** The context key for the compiler. */ 90 public static final Context.Key<JavaCompiler> compilerKey = new Context.Key<>(); 91 92 /** Get the JavaCompiler instance for this context. */ 93 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 attr = Attr.instance(context); 377 chk = Check.instance(context); 378 gen = Gen.instance(context); 379 flow = Flow.instance(context); 380 transTypes = TransTypes.instance(context); 381 lower = Lower.instance(context); 382 annotate = Annotate.instance(context); 383 types = Types.instance(context); 384 taskListener = MultiTaskListener.instance(context); 385 386 finder.sourceCompleter = sourceCompleter; 387 388 options = Options.instance(context); 389 390 verbose = options.isSet(VERBOSE); 391 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s 392 encoding = options.get(ENCODING); 393 lineDebugInfo = options.isUnset(G_CUSTOM) || 394 options.isSet(G_CUSTOM, "lines"); 395 genEndPos = options.isSet(XJCOV) || 396 context.get(DiagnosticListener.class) != null; 397 devVerbose = options.isSet("dev"); 398 processPcks = options.isSet("process.packages"); 399 werror = options.isSet(WERROR); 400 401 verboseCompilePolicy = options.isSet("verboseCompilePolicy"); 402 403 if (options.isSet("shouldStopPolicy") && 404 CompileState.valueOf(options.get("shouldStopPolicy")) == CompileState.ATTR) 405 compilePolicy = CompilePolicy.ATTR_ONLY; 406 else 407 compilePolicy = CompilePolicy.decode(options.get("compilePolicy")); 408 409 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit")); 410 411 completionFailureName = 412 options.isSet("failcomplete") 413 ? names.fromString(options.get("failcomplete")) 414 : null; 415 416 shouldStopPolicyIfError = 417 options.isSet("shouldStopPolicy") // backwards compatible 418 ? CompileState.valueOf(options.get("shouldStopPolicy")) 419 : options.isSet("shouldStopPolicyIfError") 420 ? CompileState.valueOf(options.get("shouldStopPolicyIfError")) 421 : CompileState.INIT; 422 shouldStopPolicyIfNoError = 423 options.isSet("shouldStopPolicyIfNoError") 424 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError")) 425 : CompileState.GENERATE; 426 427 if (options.isUnset("oldDiags")) 428 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context)); 429 430 PlatformDescription platformProvider = context.get(PlatformDescription.class); 431 432 if (platformProvider != null) 433 closeables = closeables.prepend(platformProvider); 434 } 435 436 /* Switches: 437 */ 438 439 /** Verbose output. 440 */ 441 public boolean verbose; 442 443 /** Emit plain Java source files rather than class files. 444 */ 445 public boolean sourceOutput; 446 447 /** The encoding to be used for source input. 448 */ 449 public String encoding; 450 451 /** Generate code with the LineNumberTable attribute for debugging 452 */ 453 public boolean lineDebugInfo; 454 455 /** Switch: should we store the ending positions? 456 */ 457 public boolean genEndPos; 458 459 /** Switch: should we debug ignored exceptions 460 */ 461 protected boolean devVerbose; 462 463 /** Switch: should we (annotation) process packages as well 464 */ 465 protected boolean processPcks; 466 467 /** Switch: treat warnings as errors 468 */ 469 protected boolean werror; 470 471 /** Switch: is annotation processing requested explicitly via 472 * CompilationTask.setProcessors? 473 */ 474 protected boolean explicitAnnotationProcessingRequested = false; 475 476 /** 477 * The policy for the order in which to perform the compilation 478 */ 479 protected CompilePolicy compilePolicy; 480 481 /** 482 * The policy for what to do with implicitly read source files 483 */ 484 protected ImplicitSourcePolicy implicitSourcePolicy; 485 486 /** 487 * Report activity related to compilePolicy 488 */ 489 public boolean verboseCompilePolicy; 490 491 /** 492 * Policy of how far to continue compilation after errors have occurred. 493 * Set this to minimum CompileState (INIT) to stop as soon as possible 494 * after errors. 495 */ 496 public CompileState shouldStopPolicyIfError; 497 498 /** 499 * Policy of how far to continue compilation when no errors have occurred. 500 * Set this to maximum CompileState (GENERATE) to perform full compilation. 501 * Set this lower to perform partial compilation, such as -proc:only. 502 */ 503 public CompileState shouldStopPolicyIfNoError; 504 505 /** A queue of all as yet unattributed classes. 506 */ 507 public Todo todo; 508 509 /** A list of items to be closed when the compilation is complete. 510 */ 511 public List<Closeable> closeables = List.nil(); 512 513 /** The set of currently compiled inputfiles, needed to ensure 514 * we don't accidentally overwrite an input file when -s is set. 515 * initialized by `compile'. 516 */ 517 protected Set<JavaFileObject> inputFiles = new HashSet<>(); 518 519 protected boolean shouldStop(CompileState cs) { 520 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError()) 521 ? shouldStopPolicyIfError 522 : shouldStopPolicyIfNoError; 523 return cs.isAfter(shouldStopPolicy); 524 } 525 526 /** The number of errors reported so far. 527 */ 528 public int errorCount() { 529 if (werror && log.nerrors == 0 && log.nwarnings > 0) { 530 log.error("warnings.and.werror"); 531 } 532 return log.nerrors; 533 } 534 535 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) { 536 return shouldStop(cs) ? new ListBuffer<T>() : queue; 537 } 538 539 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) { 540 return shouldStop(cs) ? List.<T>nil() : list; 541 } 542 543 /** The number of warnings reported so far. 544 */ 545 public int warningCount() { 546 return log.nwarnings; 547 } 548 549 /** Try to open input stream with given name. 550 * Report an error if this fails. 551 * @param filename The file name of the input stream to be opened. 552 */ 553 public CharSequence readSource(JavaFileObject filename) { 554 try { 555 inputFiles.add(filename); 556 return filename.getCharContent(false); 557 } catch (IOException e) { 558 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 559 return null; 560 } 561 } 562 563 /** Parse contents of input stream. 564 * @param filename The name of the file from which input stream comes. 565 * @param content The characters to be parsed. 566 */ 567 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) { 568 long msec = now(); 569 JCCompilationUnit tree = make.TopLevel(List.<JCTree>nil()); 570 if (content != null) { 571 if (verbose) { 572 log.printVerbose("parsing.started", filename); 573 } 574 if (!taskListener.isEmpty()) { 575 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename); 576 taskListener.started(e); 577 keepComments = true; 578 genEndPos = true; 579 } 580 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo); 581 tree = parser.parseCompilationUnit(); 582 if (verbose) { 583 log.printVerbose("parsing.done", Long.toString(elapsed(msec))); 584 } 585 } 586 587 tree.sourcefile = filename; 588 589 if (content != null && !taskListener.isEmpty()) { 590 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree); 591 taskListener.finished(e); 592 } 593 594 return tree; 595 } 596 // where 597 public boolean keepComments = false; 598 protected boolean keepComments() { 599 return keepComments || sourceOutput; 600 } 601 602 603 /** Parse contents of file. 604 * @param filename The name of the file to be parsed. 605 */ 606 @Deprecated 607 public JCTree.JCCompilationUnit parse(String filename) { 608 JavacFileManager fm = (JavacFileManager)fileManager; 609 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next()); 610 } 611 612 /** Parse contents of file. 613 * @param filename The name of the file to be parsed. 614 */ 615 public JCTree.JCCompilationUnit parse(JavaFileObject filename) { 616 JavaFileObject prev = log.useSource(filename); 617 try { 618 JCTree.JCCompilationUnit t = parse(filename, readSource(filename)); 619 if (t.endPositions != null) 620 log.setEndPosTable(filename, t.endPositions); 621 return t; 622 } finally { 623 log.useSource(prev); 624 } 625 } 626 627 /** Resolve an identifier which may be the binary name of a class or 628 * the Java name of a class or package. 629 * @param name The name to resolve 630 */ 631 public Symbol resolveBinaryNameOrIdent(String name) { 632 try { 633 Name flatname = names.fromString(name.replace("/", ".")); 634 return finder.loadClass(flatname); 635 } catch (CompletionFailure ignore) { 636 return resolveIdent(name); 637 } 638 } 639 640 /** Resolve an identifier. 641 * @param name The identifier to resolve 642 */ 643 public Symbol resolveIdent(String name) { 644 if (name.equals("")) 645 return syms.errSymbol; 646 JavaFileObject prev = log.useSource(null); 647 try { 648 JCExpression tree = null; 649 for (String s : name.split("\\.", -1)) { 650 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords 651 return syms.errSymbol; 652 tree = (tree == null) ? make.Ident(names.fromString(s)) 653 : make.Select(tree, names.fromString(s)); 654 } 655 JCCompilationUnit toplevel = 656 make.TopLevel(List.<JCTree>nil()); 657 toplevel.packge = syms.unnamedPackage; 658 return attr.attribIdent(tree, toplevel); 659 } finally { 660 log.useSource(prev); 661 } 662 } 663 664 /** Generate code and emit a class file for a given class 665 * @param env The attribution environment of the outermost class 666 * containing this class. 667 * @param cdef The class definition from which code is generated. 668 */ 669 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 670 try { 671 if (gen.genClass(env, cdef) && (errorCount() == 0)) 672 return writer.writeClass(cdef.sym); 673 } catch (ClassWriter.PoolOverflow ex) { 674 log.error(cdef.pos(), "limit.pool"); 675 } catch (ClassWriter.StringOverflow ex) { 676 log.error(cdef.pos(), "limit.string.overflow", 677 ex.value.substring(0, 20)); 678 } catch (CompletionFailure ex) { 679 chk.completionError(cdef.pos(), ex); 680 } 681 return null; 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 /** Compile a source file that has been accessed by the class finder. 709 * @param c The class the source file of which needs to be compiled. 710 */ 711 private void readSourceFile(ClassSymbol c) throws CompletionFailure { 712 readSourceFile(null, c); 713 } 714 715 /** Compile a ClassSymbol from source, optionally using the given compilation unit as 716 * the source tree. 717 * @param tree the compilation unit in which the given ClassSymbol resides, 718 * or null if should be parsed from source 719 * @param c the ClassSymbol to complete 720 */ 721 public void readSourceFile(JCCompilationUnit tree, ClassSymbol c) throws CompletionFailure { 722 if (completionFailureName == c.fullname) { 723 throw new CompletionFailure(c, "user-selected completion failure by class name"); 724 } 725 JavaFileObject filename = c.classfile; 726 JavaFileObject prev = log.useSource(filename); 727 728 if (tree == null) { 729 try { 730 tree = parse(filename, filename.getCharContent(false)); 731 } catch (IOException e) { 732 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 733 tree = make.TopLevel(List.<JCTree>nil()); 734 } finally { 735 log.useSource(prev); 736 } 737 } 738 739 if (!taskListener.isEmpty()) { 740 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 741 taskListener.started(e); 742 } 743 744 enter.complete(List.of(tree), c); 745 746 if (!taskListener.isEmpty()) { 747 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 748 taskListener.finished(e); 749 } 750 751 if (enter.getEnv(c) == null) { 752 boolean isPkgInfo = 753 tree.sourcefile.isNameCompatible("package-info", 754 JavaFileObject.Kind.SOURCE); 755 if (isPkgInfo) { 756 if (enter.getEnv(tree.packge) == null) { 757 JCDiagnostic diag = 758 diagFactory.fragment("file.does.not.contain.package", 759 c.location()); 760 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 761 } 762 } else { 763 JCDiagnostic diag = 764 diagFactory.fragment("file.doesnt.contain.class", 765 c.getQualifiedName()); 766 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 767 } 768 } 769 770 implicitSourceFilesRead = true; 771 } 772 773 /** Track when the JavaCompiler has been used to compile something. */ 774 private boolean hasBeenUsed = false; 775 private long start_msec = 0; 776 public long elapsed_msec = 0; 777 778 public void compile(List<JavaFileObject> sourceFileObject) 779 throws Throwable { 780 compile(sourceFileObject, List.<String>nil(), null); 781 } 782 783 /** 784 * Main method: compile a list of files, return all compiled classes 785 * 786 * @param sourceFileObjects file objects to be compiled 787 * @param classnames class names to process for annotations 788 * @param processors user provided annotation processors to bypass 789 * discovery, {@code null} means that no processors were provided 790 */ 791 public void compile(Collection<JavaFileObject> sourceFileObjects, 792 Collection<String> classnames, 793 Iterable<? extends Processor> processors) 794 { 795 if (!taskListener.isEmpty()) { 796 taskListener.started(new TaskEvent(TaskEvent.Kind.COMPILATION)); 797 } 798 799 if (processors != null && processors.iterator().hasNext()) 800 explicitAnnotationProcessingRequested = true; 801 // as a JavaCompiler can only be used once, throw an exception if 802 // it has been used before. 803 if (hasBeenUsed) 804 checkReusable(); 805 hasBeenUsed = true; 806 807 // forcibly set the equivalent of -Xlint:-options, so that no further 808 // warnings about command line options are generated from this point on 809 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true"); 810 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option); 811 812 start_msec = now(); 813 814 try { 815 initProcessAnnotations(processors); 816 817 // These method calls must be chained to avoid memory leaks 818 processAnnotations( 819 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))), 820 classnames); 821 822 // If it's safe to do so, skip attr / flow / gen for implicit classes 823 if (taskListener.isEmpty() && 824 implicitSourcePolicy == ImplicitSourcePolicy.NONE) { 825 todo.retainFiles(inputFiles); 826 } 827 828 switch (compilePolicy) { 829 case ATTR_ONLY: 830 attribute(todo); 831 break; 832 833 case CHECK_ONLY: 834 flow(attribute(todo)); 835 break; 836 837 case SIMPLE: 838 generate(desugar(flow(attribute(todo)))); 839 break; 840 841 case BY_FILE: { 842 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile(); 843 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) { 844 generate(desugar(flow(attribute(q.remove())))); 845 } 846 } 847 break; 848 849 case BY_TODO: 850 while (!todo.isEmpty()) 851 generate(desugar(flow(attribute(todo.remove())))); 852 break; 853 854 default: 855 Assert.error("unknown compile policy"); 856 } 857 } catch (Abort ex) { 858 if (devVerbose) 859 ex.printStackTrace(System.err); 860 } finally { 861 if (verbose) { 862 elapsed_msec = elapsed(start_msec); 863 log.printVerbose("total", Long.toString(elapsed_msec)); 864 } 865 866 reportDeferredDiagnostics(); 867 868 if (!log.hasDiagnosticListener()) { 869 printCount("error", errorCount()); 870 printCount("warn", warningCount()); 871 } 872 if (!taskListener.isEmpty()) { 873 taskListener.finished(new TaskEvent(TaskEvent.Kind.COMPILATION)); 874 } 875 close(); 876 if (procEnvImpl != null) 877 procEnvImpl.close(); 878 } 879 } 880 881 protected void checkReusable() { 882 throw new AssertionError("attempt to reuse JavaCompiler"); 883 } 884 885 /** 886 * The list of classes explicitly supplied on the command line for compilation. 887 * Not always populated. 888 */ 889 private List<JCClassDecl> rootClasses; 890 891 /** 892 * Parses a list of files. 893 */ 894 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) { 895 if (shouldStop(CompileState.PARSE)) 896 return List.nil(); 897 898 //parse all files 899 ListBuffer<JCCompilationUnit> trees = new ListBuffer<>(); 900 Set<JavaFileObject> filesSoFar = new HashSet<>(); 901 for (JavaFileObject fileObject : fileObjects) { 902 if (!filesSoFar.contains(fileObject)) { 903 filesSoFar.add(fileObject); 904 trees.append(parse(fileObject)); 905 } 906 } 907 return trees.toList(); 908 } 909 910 /** 911 * Enter the symbols found in a list of parse trees if the compilation 912 * is expected to proceed beyond anno processing into attr. 913 * As a side-effect, this puts elements on the "todo" list. 914 * Also stores a list of all top level classes in rootClasses. 915 */ 916 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) { 917 if (shouldStop(CompileState.ATTR)) 918 return List.nil(); 919 return enterTrees(roots); 920 } 921 922 /** 923 * Enter the symbols found in a list of parse trees. 924 * As a side-effect, this puts elements on the "todo" list. 925 * Also stores a list of all top level classes in rootClasses. 926 */ 927 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) { 928 //enter symbols for all files 929 if (!taskListener.isEmpty()) { 930 for (JCCompilationUnit unit: roots) { 931 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 932 taskListener.started(e); 933 } 934 } 935 936 enter.main(roots); 937 938 if (!taskListener.isEmpty()) { 939 for (JCCompilationUnit unit: roots) { 940 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 941 taskListener.finished(e); 942 } 943 } 944 945 // If generating source, or if tracking public apis, 946 // then remember the classes declared in 947 // the original compilation units listed on the command line. 948 if (sourceOutput) { 949 ListBuffer<JCClassDecl> cdefs = new ListBuffer<>(); 950 for (JCCompilationUnit unit : roots) { 951 for (List<JCTree> defs = unit.defs; 952 defs.nonEmpty(); 953 defs = defs.tail) { 954 if (defs.head instanceof JCClassDecl) 955 cdefs.append((JCClassDecl)defs.head); 956 } 957 } 958 rootClasses = cdefs.toList(); 959 } 960 961 // Ensure the input files have been recorded. Although this is normally 962 // done by readSource, it may not have been done if the trees were read 963 // in a prior round of annotation processing, and the trees have been 964 // cleaned and are being reused. 965 for (JCCompilationUnit unit : roots) { 966 inputFiles.add(unit.sourcefile); 967 } 968 969 return roots; 970 } 971 972 /** 973 * Set to true to enable skeleton annotation processing code. 974 * Currently, we assume this variable will be replaced more 975 * advanced logic to figure out if annotation processing is 976 * needed. 977 */ 978 boolean processAnnotations = false; 979 980 Log.DeferredDiagnosticHandler deferredDiagnosticHandler; 981 982 /** 983 * Object to handle annotation processing. 984 */ 985 private JavacProcessingEnvironment procEnvImpl = null; 986 987 /** 988 * Check if we should process annotations. 989 * If so, and if no scanner is yet registered, then set up the DocCommentScanner 990 * to catch doc comments, and set keepComments so the parser records them in 991 * the compilation unit. 992 * 993 * @param processors user provided annotation processors to bypass 994 * discovery, {@code null} means that no processors were provided 995 */ 996 public void initProcessAnnotations(Iterable<? extends Processor> processors) { 997 // Process annotations if processing is not disabled and there 998 // is at least one Processor available. 999 if (options.isSet(PROC, "none")) { 1000 processAnnotations = false; 1001 } else if (procEnvImpl == null) { 1002 procEnvImpl = JavacProcessingEnvironment.instance(context); 1003 procEnvImpl.setProcessors(processors); 1004 processAnnotations = procEnvImpl.atLeastOneProcessor(); 1005 1006 if (processAnnotations) { 1007 options.put("save-parameter-names", "save-parameter-names"); 1008 reader.saveParameterNames = true; 1009 keepComments = true; 1010 genEndPos = true; 1011 if (!taskListener.isEmpty()) 1012 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING)); 1013 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log); 1014 } else { // free resources 1015 procEnvImpl.close(); 1016 } 1017 } 1018 } 1019 1020 // TODO: called by JavacTaskImpl 1021 public void processAnnotations(List<JCCompilationUnit> roots) { 1022 processAnnotations(roots, List.<String>nil()); 1023 } 1024 1025 /** 1026 * Process any annotations found in the specified compilation units. 1027 * @param roots a list of compilation units 1028 */ 1029 // Implementation note: when this method is called, log.deferredDiagnostics 1030 // will have been set true by initProcessAnnotations, meaning that any diagnostics 1031 // that are reported will go into the log.deferredDiagnostics queue. 1032 // By the time this method exits, log.deferDiagnostics must be set back to false, 1033 // and all deferredDiagnostics must have been handled: i.e. either reported 1034 // or determined to be transient, and therefore suppressed. 1035 public void processAnnotations(List<JCCompilationUnit> roots, 1036 Collection<String> classnames) { 1037 if (shouldStop(CompileState.PROCESS)) { 1038 // Errors were encountered. 1039 // Unless all the errors are resolve errors, the errors were parse errors 1040 // or other errors during enter which cannot be fixed by running 1041 // any annotation processors. 1042 if (unrecoverableError()) { 1043 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1044 log.popDiagnosticHandler(deferredDiagnosticHandler); 1045 return ; 1046 } 1047 } 1048 1049 // ASSERT: processAnnotations and procEnvImpl should have been set up by 1050 // by initProcessAnnotations 1051 1052 // NOTE: The !classnames.isEmpty() checks should be refactored to Main. 1053 1054 if (!processAnnotations) { 1055 // If there are no annotation processors present, and 1056 // annotation processing is to occur with compilation, 1057 // emit a warning. 1058 if (options.isSet(PROC, "only")) { 1059 log.warning("proc.proc-only.requested.no.procs"); 1060 todo.clear(); 1061 } 1062 // If not processing annotations, classnames must be empty 1063 if (!classnames.isEmpty()) { 1064 log.error("proc.no.explicit.annotation.processing.requested", 1065 classnames); 1066 } 1067 Assert.checkNull(deferredDiagnosticHandler); 1068 return ; // continue regular compilation 1069 } 1070 1071 Assert.checkNonNull(deferredDiagnosticHandler); 1072 1073 try { 1074 List<ClassSymbol> classSymbols = List.nil(); 1075 List<PackageSymbol> pckSymbols = List.nil(); 1076 if (!classnames.isEmpty()) { 1077 // Check for explicit request for annotation 1078 // processing 1079 if (!explicitAnnotationProcessingRequested()) { 1080 log.error("proc.no.explicit.annotation.processing.requested", 1081 classnames); 1082 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1083 log.popDiagnosticHandler(deferredDiagnosticHandler); 1084 return ; // TODO: Will this halt compilation? 1085 } else { 1086 boolean errors = false; 1087 for (String nameStr : classnames) { 1088 Symbol sym = resolveBinaryNameOrIdent(nameStr); 1089 if (sym == null || 1090 (sym.kind == PCK && !processPcks) || 1091 sym.kind == ABSENT_TYP) { 1092 log.error("proc.cant.find.class", nameStr); 1093 errors = true; 1094 continue; 1095 } 1096 try { 1097 if (sym.kind == PCK) 1098 sym.complete(); 1099 if (sym.exists()) { 1100 if (sym.kind == PCK) 1101 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1102 else 1103 classSymbols = classSymbols.prepend((ClassSymbol)sym); 1104 continue; 1105 } 1106 Assert.check(sym.kind == PCK); 1107 log.warning("proc.package.does.not.exist", nameStr); 1108 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1109 } catch (CompletionFailure e) { 1110 log.error("proc.cant.find.class", nameStr); 1111 errors = true; 1112 continue; 1113 } 1114 } 1115 if (errors) { 1116 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1117 log.popDiagnosticHandler(deferredDiagnosticHandler); 1118 return ; 1119 } 1120 } 1121 } 1122 try { 1123 annotationProcessingOccurred = 1124 procEnvImpl.doProcessing(roots, 1125 classSymbols, 1126 pckSymbols, 1127 deferredDiagnosticHandler); 1128 // doProcessing will have handled deferred diagnostics 1129 } finally { 1130 procEnvImpl.close(); 1131 } 1132 } catch (CompletionFailure ex) { 1133 log.error("cant.access", ex.sym, ex.getDetailValue()); 1134 if (deferredDiagnosticHandler != null) { 1135 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1136 log.popDiagnosticHandler(deferredDiagnosticHandler); 1137 } 1138 } 1139 } 1140 1141 private boolean unrecoverableError() { 1142 if (deferredDiagnosticHandler != null) { 1143 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) { 1144 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE)) 1145 return true; 1146 } 1147 } 1148 return false; 1149 } 1150 1151 boolean explicitAnnotationProcessingRequested() { 1152 return 1153 explicitAnnotationProcessingRequested || 1154 explicitAnnotationProcessingRequested(options); 1155 } 1156 1157 static boolean explicitAnnotationProcessingRequested(Options options) { 1158 return 1159 options.isSet(PROCESSOR) || 1160 options.isSet(PROCESSORPATH) || 1161 options.isSet(PROC, "only") || 1162 options.isSet(XPRINT); 1163 } 1164 1165 public void setDeferredDiagnosticHandler(Log.DeferredDiagnosticHandler deferredDiagnosticHandler) { 1166 this.deferredDiagnosticHandler = deferredDiagnosticHandler; 1167 } 1168 1169 /** 1170 * Attribute a list of parse trees, such as found on the "todo" list. 1171 * Note that attributing classes may cause additional files to be 1172 * parsed and entered via the SourceCompleter. 1173 * Attribution of the entries in the list does not stop if any errors occur. 1174 * @return a list of environments for attribute classes. 1175 */ 1176 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) { 1177 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1178 while (!envs.isEmpty()) 1179 results.append(attribute(envs.remove())); 1180 return stopIfError(CompileState.ATTR, results); 1181 } 1182 1183 /** 1184 * Attribute a parse tree. 1185 * @return the attributed parse tree 1186 */ 1187 public Env<AttrContext> attribute(Env<AttrContext> env) { 1188 if (compileStates.isDone(env, CompileState.ATTR)) 1189 return env; 1190 1191 if (verboseCompilePolicy) 1192 printNote("[attribute " + env.enclClass.sym + "]"); 1193 if (verbose) 1194 log.printVerbose("checking.attribution", env.enclClass.sym); 1195 1196 if (!taskListener.isEmpty()) { 1197 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1198 taskListener.started(e); 1199 } 1200 1201 JavaFileObject prev = log.useSource( 1202 env.enclClass.sym.sourcefile != null ? 1203 env.enclClass.sym.sourcefile : 1204 env.toplevel.sourcefile); 1205 try { 1206 attr.attrib(env); 1207 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) { 1208 //if in fail-over mode, ensure that AST expression nodes 1209 //are correctly initialized (e.g. they have a type/symbol) 1210 attr.postAttr(env.tree); 1211 } 1212 compileStates.put(env, CompileState.ATTR); 1213 } 1214 finally { 1215 log.useSource(prev); 1216 } 1217 1218 return env; 1219 } 1220 1221 /** 1222 * Perform dataflow checks on attributed parse trees. 1223 * These include checks for definite assignment and unreachable statements. 1224 * If any errors occur, an empty list will be returned. 1225 * @return the list of attributed parse trees 1226 */ 1227 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) { 1228 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1229 for (Env<AttrContext> env: envs) { 1230 flow(env, results); 1231 } 1232 return stopIfError(CompileState.FLOW, results); 1233 } 1234 1235 /** 1236 * Perform dataflow checks on an attributed parse tree. 1237 */ 1238 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) { 1239 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1240 flow(env, results); 1241 return stopIfError(CompileState.FLOW, results); 1242 } 1243 1244 /** 1245 * Perform dataflow checks on an attributed parse tree. 1246 */ 1247 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) { 1248 if (compileStates.isDone(env, CompileState.FLOW)) { 1249 results.add(env); 1250 return; 1251 } 1252 1253 try { 1254 if (shouldStop(CompileState.FLOW)) 1255 return; 1256 1257 if (verboseCompilePolicy) 1258 printNote("[flow " + env.enclClass.sym + "]"); 1259 JavaFileObject prev = log.useSource( 1260 env.enclClass.sym.sourcefile != null ? 1261 env.enclClass.sym.sourcefile : 1262 env.toplevel.sourcefile); 1263 try { 1264 make.at(Position.FIRSTPOS); 1265 TreeMaker localMake = make.forToplevel(env.toplevel); 1266 flow.analyzeTree(env, localMake); 1267 compileStates.put(env, CompileState.FLOW); 1268 1269 if (shouldStop(CompileState.FLOW)) 1270 return; 1271 1272 results.add(env); 1273 } 1274 finally { 1275 log.useSource(prev); 1276 } 1277 } 1278 finally { 1279 if (!taskListener.isEmpty()) { 1280 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1281 taskListener.finished(e); 1282 } 1283 } 1284 } 1285 1286 /** 1287 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1288 * for source or code generation. 1289 * If any errors occur, an empty list will be returned. 1290 * @return a list containing the classes to be generated 1291 */ 1292 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) { 1293 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = new ListBuffer<>(); 1294 for (Env<AttrContext> env: envs) 1295 desugar(env, results); 1296 return stopIfError(CompileState.FLOW, results); 1297 } 1298 1299 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs = new HashMap<>(); 1300 1301 /** 1302 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1303 * for source or code generation. If the file was not listed on the command line, 1304 * the current implicitSourcePolicy is taken into account. 1305 * The preparation stops as soon as an error is found. 1306 */ 1307 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) { 1308 if (shouldStop(CompileState.TRANSTYPES)) 1309 return; 1310 1311 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE 1312 && !inputFiles.contains(env.toplevel.sourcefile)) { 1313 return; 1314 } 1315 1316 if (compileStates.isDone(env, CompileState.LOWER)) { 1317 results.addAll(desugaredEnvs.get(env)); 1318 return; 1319 } 1320 1321 /** 1322 * Ensure that superclasses of C are desugared before C itself. This is 1323 * required for two reasons: (i) as erasure (TransTypes) destroys 1324 * information needed in flow analysis and (ii) as some checks carried 1325 * out during lowering require that all synthetic fields/methods have 1326 * already been added to C and its superclasses. 1327 */ 1328 class ScanNested extends TreeScanner { 1329 Set<Env<AttrContext>> dependencies = new LinkedHashSet<>(); 1330 protected boolean hasLambdas; 1331 @Override 1332 public void visitClassDef(JCClassDecl node) { 1333 Type st = types.supertype(node.sym.type); 1334 boolean envForSuperTypeFound = false; 1335 while (!envForSuperTypeFound && st.hasTag(CLASS)) { 1336 ClassSymbol c = st.tsym.outermostClass(); 1337 Env<AttrContext> stEnv = enter.getEnv(c); 1338 if (stEnv != null && env != stEnv) { 1339 if (dependencies.add(stEnv)) { 1340 boolean prevHasLambdas = hasLambdas; 1341 try { 1342 scan(stEnv.tree); 1343 } finally { 1344 /* 1345 * ignore any updates to hasLambdas made during 1346 * the nested scan, this ensures an initalized 1347 * LambdaToMethod is available only to those 1348 * classes that contain lambdas 1349 */ 1350 hasLambdas = prevHasLambdas; 1351 } 1352 } 1353 envForSuperTypeFound = true; 1354 } 1355 st = types.supertype(st); 1356 } 1357 super.visitClassDef(node); 1358 } 1359 @Override 1360 public void visitLambda(JCLambda tree) { 1361 hasLambdas = true; 1362 super.visitLambda(tree); 1363 } 1364 @Override 1365 public void visitReference(JCMemberReference tree) { 1366 hasLambdas = true; 1367 super.visitReference(tree); 1368 } 1369 } 1370 ScanNested scanner = new ScanNested(); 1371 scanner.scan(env.tree); 1372 for (Env<AttrContext> dep: scanner.dependencies) { 1373 if (!compileStates.isDone(dep, CompileState.FLOW)) 1374 desugaredEnvs.put(dep, desugar(flow(attribute(dep)))); 1375 } 1376 1377 //We need to check for error another time as more classes might 1378 //have been attributed and analyzed at this stage 1379 if (shouldStop(CompileState.TRANSTYPES)) 1380 return; 1381 1382 if (verboseCompilePolicy) 1383 printNote("[desugar " + env.enclClass.sym + "]"); 1384 1385 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1386 env.enclClass.sym.sourcefile : 1387 env.toplevel.sourcefile); 1388 try { 1389 //save tree prior to rewriting 1390 JCTree untranslated = env.tree; 1391 1392 make.at(Position.FIRSTPOS); 1393 TreeMaker localMake = make.forToplevel(env.toplevel); 1394 1395 if (env.tree.hasTag(JCTree.Tag.PACKAGEDEF)) { 1396 if (!(sourceOutput)) { 1397 if (shouldStop(CompileState.LOWER)) 1398 return; 1399 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake); 1400 if (pdef.head != null) { 1401 Assert.check(pdef.tail.isEmpty()); 1402 results.add(new Pair<>(env, (JCClassDecl)pdef.head)); 1403 } 1404 } 1405 return; 1406 } 1407 1408 if (shouldStop(CompileState.TRANSTYPES)) 1409 return; 1410 1411 env.tree = transTypes.translateTopLevelClass(env.tree, localMake); 1412 compileStates.put(env, CompileState.TRANSTYPES); 1413 1414 if (source.allowLambda() && scanner.hasLambdas) { 1415 if (shouldStop(CompileState.UNLAMBDA)) 1416 return; 1417 1418 env.tree = LambdaToMethod.instance(context).translateTopLevelClass(env, env.tree, localMake); 1419 compileStates.put(env, CompileState.UNLAMBDA); 1420 } 1421 1422 if (shouldStop(CompileState.LOWER)) 1423 return; 1424 1425 if (sourceOutput) { 1426 //emit standard Java source file, only for compilation 1427 //units enumerated explicitly on the command line 1428 JCClassDecl cdef = (JCClassDecl)env.tree; 1429 if (untranslated instanceof JCClassDecl && 1430 rootClasses.contains((JCClassDecl)untranslated)) { 1431 results.add(new Pair<>(env, cdef)); 1432 } 1433 return; 1434 } 1435 1436 //translate out inner classes 1437 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake); 1438 compileStates.put(env, CompileState.LOWER); 1439 1440 if (shouldStop(CompileState.LOWER)) 1441 return; 1442 1443 //generate code for each class 1444 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) { 1445 JCClassDecl cdef = (JCClassDecl)l.head; 1446 results.add(new Pair<>(env, cdef)); 1447 } 1448 } 1449 finally { 1450 log.useSource(prev); 1451 } 1452 1453 } 1454 1455 /** Generates the source or class file for a list of classes. 1456 * The decision to generate a source file or a class file is 1457 * based upon the compiler's options. 1458 * Generation stops if an error occurs while writing files. 1459 */ 1460 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) { 1461 generate(queue, null); 1462 } 1463 1464 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) { 1465 if (shouldStop(CompileState.GENERATE)) 1466 return; 1467 1468 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) { 1469 Env<AttrContext> env = x.fst; 1470 JCClassDecl cdef = x.snd; 1471 1472 if (verboseCompilePolicy) { 1473 printNote("[generate " + (sourceOutput ? " source" : "code") + " " + cdef.sym + "]"); 1474 } 1475 1476 if (!taskListener.isEmpty()) { 1477 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1478 taskListener.started(e); 1479 } 1480 1481 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1482 env.enclClass.sym.sourcefile : 1483 env.toplevel.sourcefile); 1484 try { 1485 JavaFileObject file; 1486 if (sourceOutput) { 1487 file = printSource(env, cdef); 1488 } else { 1489 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT) 1490 && jniWriter.needsHeader(cdef.sym)) { 1491 jniWriter.write(cdef.sym); 1492 } 1493 file = genCode(env, cdef); 1494 } 1495 if (results != null && file != null) 1496 results.add(file); 1497 } catch (IOException ex) { 1498 log.error(cdef.pos(), "class.cant.write", 1499 cdef.sym, ex.getMessage()); 1500 return; 1501 } finally { 1502 log.useSource(prev); 1503 } 1504 1505 if (!taskListener.isEmpty()) { 1506 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1507 taskListener.finished(e); 1508 } 1509 } 1510 } 1511 1512 // where 1513 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) { 1514 // use a LinkedHashMap to preserve the order of the original list as much as possible 1515 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<>(); 1516 for (Env<AttrContext> env: envs) { 1517 Queue<Env<AttrContext>> sublist = map.get(env.toplevel); 1518 if (sublist == null) { 1519 sublist = new ListBuffer<>(); 1520 map.put(env.toplevel, sublist); 1521 } 1522 sublist.add(env); 1523 } 1524 return map; 1525 } 1526 1527 JCClassDecl removeMethodBodies(JCClassDecl cdef) { 1528 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0; 1529 class MethodBodyRemover extends TreeTranslator { 1530 @Override 1531 public void visitMethodDef(JCMethodDecl tree) { 1532 tree.mods.flags &= ~Flags.SYNCHRONIZED; 1533 for (JCVariableDecl vd : tree.params) 1534 vd.mods.flags &= ~Flags.FINAL; 1535 tree.body = null; 1536 super.visitMethodDef(tree); 1537 } 1538 @Override 1539 public void visitVarDef(JCVariableDecl tree) { 1540 if (tree.init != null && tree.init.type.constValue() == null) 1541 tree.init = null; 1542 super.visitVarDef(tree); 1543 } 1544 @Override 1545 public void visitClassDef(JCClassDecl tree) { 1546 ListBuffer<JCTree> newdefs = new ListBuffer<>(); 1547 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) { 1548 JCTree t = it.head; 1549 switch (t.getTag()) { 1550 case CLASSDEF: 1551 if (isInterface || 1552 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1553 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1554 newdefs.append(t); 1555 break; 1556 case METHODDEF: 1557 if (isInterface || 1558 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1559 ((JCMethodDecl) t).sym.name == names.init || 1560 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1561 newdefs.append(t); 1562 break; 1563 case VARDEF: 1564 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1565 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1566 newdefs.append(t); 1567 break; 1568 default: 1569 break; 1570 } 1571 } 1572 tree.defs = newdefs.toList(); 1573 super.visitClassDef(tree); 1574 } 1575 } 1576 MethodBodyRemover r = new MethodBodyRemover(); 1577 return r.translate(cdef); 1578 } 1579 1580 public void reportDeferredDiagnostics() { 1581 if (errorCount() == 0 1582 && annotationProcessingOccurred 1583 && implicitSourceFilesRead 1584 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) { 1585 if (explicitAnnotationProcessingRequested()) 1586 log.warning("proc.use.implicit"); 1587 else 1588 log.warning("proc.use.proc.or.implicit"); 1589 } 1590 chk.reportDeferredDiagnostics(); 1591 if (log.compressedOutput) { 1592 log.mandatoryNote(null, "compressed.diags"); 1593 } 1594 } 1595 1596 /** Close the compiler, flushing the logs 1597 */ 1598 public void close() { 1599 rootClasses = null; 1600 finder = null; 1601 reader = null; 1602 make = null; 1603 writer = null; 1604 enter = null; 1605 if (todo != null) 1606 todo.clear(); 1607 todo = null; 1608 parserFactory = null; 1609 syms = null; 1610 source = null; 1611 attr = null; 1612 chk = null; 1613 gen = null; 1614 flow = null; 1615 transTypes = null; 1616 lower = null; 1617 annotate = null; 1618 types = null; 1619 1620 log.flush(); 1621 try { 1622 fileManager.flush(); 1623 } catch (IOException e) { 1624 throw new Abort(e); 1625 } finally { 1626 if (names != null) 1627 names.dispose(); 1628 names = null; 1629 1630 for (Closeable c: closeables) { 1631 try { 1632 c.close(); 1633 } catch (IOException e) { 1634 // When javac uses JDK 7 as a baseline, this code would be 1635 // better written to set any/all exceptions from all the 1636 // Closeables as suppressed exceptions on the FatalError 1637 // that is thrown. 1638 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close"); 1639 throw new FatalError(msg, e); 1640 } 1641 } 1642 closeables = List.nil(); 1643 } 1644 } 1645 1646 protected void printNote(String lines) { 1647 log.printRawLines(Log.WriterKind.NOTICE, lines); 1648 } 1649 1650 /** Print numbers of errors and warnings. 1651 */ 1652 public void printCount(String kind, int count) { 1653 if (count != 0) { 1654 String key; 1655 if (count == 1) 1656 key = "count." + kind; 1657 else 1658 key = "count." + kind + ".plural"; 1659 log.printLines(WriterKind.ERROR, key, String.valueOf(count)); 1660 log.flush(Log.WriterKind.ERROR); 1661 } 1662 } 1663 1664 private static long now() { 1665 return System.currentTimeMillis(); 1666 } 1667 1668 private static long elapsed(long then) { 1669 return now() - then; 1670 } 1671 1672 public void newRound() { 1673 inputFiles.clear(); 1674 todo.clear(); 1675 } 1676} 1677