JavaCompiler.java revision 3259:700565092eb6
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 lineDebugInfo = options.isUnset(G_CUSTOM) || 393 options.isSet(G_CUSTOM, "lines"); 394 genEndPos = options.isSet(XJCOV) || 395 context.get(DiagnosticListener.class) != null; 396 devVerbose = options.isSet("dev"); 397 processPcks = options.isSet("process.packages"); 398 werror = options.isSet(WERROR); 399 400 verboseCompilePolicy = options.isSet("verboseCompilePolicy"); 401 402 if (options.isSet("shouldStopPolicy") && 403 CompileState.valueOf(options.get("shouldStopPolicy")) == CompileState.ATTR) 404 compilePolicy = CompilePolicy.ATTR_ONLY; 405 else 406 compilePolicy = CompilePolicy.decode(options.get("compilePolicy")); 407 408 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit")); 409 410 completionFailureName = 411 options.isSet("failcomplete") 412 ? names.fromString(options.get("failcomplete")) 413 : null; 414 415 shouldStopPolicyIfError = 416 options.isSet("shouldStopPolicy") // backwards compatible 417 ? CompileState.valueOf(options.get("shouldStopPolicy")) 418 : options.isSet("shouldStopPolicyIfError") 419 ? CompileState.valueOf(options.get("shouldStopPolicyIfError")) 420 : CompileState.INIT; 421 shouldStopPolicyIfNoError = 422 options.isSet("shouldStopPolicyIfNoError") 423 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError")) 424 : CompileState.GENERATE; 425 426 if (options.isUnset("oldDiags")) 427 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context)); 428 429 PlatformDescription platformProvider = context.get(PlatformDescription.class); 430 431 if (platformProvider != null) 432 closeables = closeables.prepend(platformProvider); 433 } 434 435 /* Switches: 436 */ 437 438 /** Verbose output. 439 */ 440 public boolean verbose; 441 442 /** Emit plain Java source files rather than class files. 443 */ 444 public boolean sourceOutput; 445 446 447 /** Generate code with the LineNumberTable attribute for debugging 448 */ 449 public boolean lineDebugInfo; 450 451 /** Switch: should we store the ending positions? 452 */ 453 public boolean genEndPos; 454 455 /** Switch: should we debug ignored exceptions 456 */ 457 protected boolean devVerbose; 458 459 /** Switch: should we (annotation) process packages as well 460 */ 461 protected boolean processPcks; 462 463 /** Switch: treat warnings as errors 464 */ 465 protected boolean werror; 466 467 /** Switch: is annotation processing requested explicitly via 468 * CompilationTask.setProcessors? 469 */ 470 protected boolean explicitAnnotationProcessingRequested = false; 471 472 /** 473 * The policy for the order in which to perform the compilation 474 */ 475 protected CompilePolicy compilePolicy; 476 477 /** 478 * The policy for what to do with implicitly read source files 479 */ 480 protected ImplicitSourcePolicy implicitSourcePolicy; 481 482 /** 483 * Report activity related to compilePolicy 484 */ 485 public boolean verboseCompilePolicy; 486 487 /** 488 * Policy of how far to continue compilation after errors have occurred. 489 * Set this to minimum CompileState (INIT) to stop as soon as possible 490 * after errors. 491 */ 492 public CompileState shouldStopPolicyIfError; 493 494 /** 495 * Policy of how far to continue compilation when no errors have occurred. 496 * Set this to maximum CompileState (GENERATE) to perform full compilation. 497 * Set this lower to perform partial compilation, such as -proc:only. 498 */ 499 public CompileState shouldStopPolicyIfNoError; 500 501 /** A queue of all as yet unattributed classes. 502 */ 503 public Todo todo; 504 505 /** A list of items to be closed when the compilation is complete. 506 */ 507 public List<Closeable> closeables = List.nil(); 508 509 /** The set of currently compiled inputfiles, needed to ensure 510 * we don't accidentally overwrite an input file when -s is set. 511 * initialized by `compile'. 512 */ 513 protected Set<JavaFileObject> inputFiles = new HashSet<>(); 514 515 protected boolean shouldStop(CompileState cs) { 516 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError()) 517 ? shouldStopPolicyIfError 518 : shouldStopPolicyIfNoError; 519 return cs.isAfter(shouldStopPolicy); 520 } 521 522 /** The number of errors reported so far. 523 */ 524 public int errorCount() { 525 if (werror && log.nerrors == 0 && log.nwarnings > 0) { 526 log.error("warnings.and.werror"); 527 } 528 return log.nerrors; 529 } 530 531 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) { 532 return shouldStop(cs) ? new ListBuffer<T>() : queue; 533 } 534 535 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) { 536 return shouldStop(cs) ? List.<T>nil() : list; 537 } 538 539 /** The number of warnings reported so far. 540 */ 541 public int warningCount() { 542 return log.nwarnings; 543 } 544 545 /** Try to open input stream with given name. 546 * Report an error if this fails. 547 * @param filename The file name of the input stream to be opened. 548 */ 549 public CharSequence readSource(JavaFileObject filename) { 550 try { 551 inputFiles.add(filename); 552 return filename.getCharContent(false); 553 } catch (IOException e) { 554 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 555 return null; 556 } 557 } 558 559 /** Parse contents of input stream. 560 * @param filename The name of the file from which input stream comes. 561 * @param content The characters to be parsed. 562 */ 563 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) { 564 long msec = now(); 565 JCCompilationUnit tree = make.TopLevel(List.<JCTree>nil()); 566 if (content != null) { 567 if (verbose) { 568 log.printVerbose("parsing.started", filename); 569 } 570 if (!taskListener.isEmpty()) { 571 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename); 572 taskListener.started(e); 573 keepComments = true; 574 genEndPos = true; 575 } 576 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo); 577 tree = parser.parseCompilationUnit(); 578 if (verbose) { 579 log.printVerbose("parsing.done", Long.toString(elapsed(msec))); 580 } 581 } 582 583 tree.sourcefile = filename; 584 585 if (content != null && !taskListener.isEmpty()) { 586 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree); 587 taskListener.finished(e); 588 } 589 590 return tree; 591 } 592 // where 593 public boolean keepComments = false; 594 protected boolean keepComments() { 595 return keepComments || sourceOutput; 596 } 597 598 599 /** Parse contents of file. 600 * @param filename The name of the file to be parsed. 601 */ 602 @Deprecated 603 public JCTree.JCCompilationUnit parse(String filename) { 604 JavacFileManager fm = (JavacFileManager)fileManager; 605 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next()); 606 } 607 608 /** Parse contents of file. 609 * @param filename The name of the file to be parsed. 610 */ 611 public JCTree.JCCompilationUnit parse(JavaFileObject filename) { 612 JavaFileObject prev = log.useSource(filename); 613 try { 614 JCTree.JCCompilationUnit t = parse(filename, readSource(filename)); 615 if (t.endPositions != null) 616 log.setEndPosTable(filename, t.endPositions); 617 return t; 618 } finally { 619 log.useSource(prev); 620 } 621 } 622 623 /** Resolve an identifier which may be the binary name of a class or 624 * the Java name of a class or package. 625 * @param name The name to resolve 626 */ 627 public Symbol resolveBinaryNameOrIdent(String name) { 628 try { 629 Name flatname = names.fromString(name.replace("/", ".")); 630 return finder.loadClass(flatname); 631 } catch (CompletionFailure ignore) { 632 return resolveIdent(name); 633 } 634 } 635 636 /** Resolve an identifier. 637 * @param name The identifier to resolve 638 */ 639 public Symbol resolveIdent(String name) { 640 if (name.equals("")) 641 return syms.errSymbol; 642 JavaFileObject prev = log.useSource(null); 643 try { 644 JCExpression tree = null; 645 for (String s : name.split("\\.", -1)) { 646 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords 647 return syms.errSymbol; 648 tree = (tree == null) ? make.Ident(names.fromString(s)) 649 : make.Select(tree, names.fromString(s)); 650 } 651 JCCompilationUnit toplevel = 652 make.TopLevel(List.<JCTree>nil()); 653 toplevel.packge = syms.unnamedPackage; 654 return attr.attribIdent(tree, toplevel); 655 } finally { 656 log.useSource(prev); 657 } 658 } 659 660 /** Generate code and emit a class file for a given class 661 * @param env The attribution environment of the outermost class 662 * containing this class. 663 * @param cdef The class definition from which code is generated. 664 */ 665 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 666 try { 667 if (gen.genClass(env, cdef) && (errorCount() == 0)) 668 return writer.writeClass(cdef.sym); 669 } catch (ClassWriter.PoolOverflow ex) { 670 log.error(cdef.pos(), "limit.pool"); 671 } catch (ClassWriter.StringOverflow ex) { 672 log.error(cdef.pos(), "limit.string.overflow", 673 ex.value.substring(0, 20)); 674 } catch (CompletionFailure ex) { 675 chk.completionError(cdef.pos(), ex); 676 } 677 return null; 678 } 679 680 /** Emit plain Java source for a class. 681 * @param env The attribution environment of the outermost class 682 * containing this class. 683 * @param cdef The class definition to be printed. 684 */ 685 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 686 JavaFileObject outFile 687 = fileManager.getJavaFileForOutput(CLASS_OUTPUT, 688 cdef.sym.flatname.toString(), 689 JavaFileObject.Kind.SOURCE, 690 null); 691 if (inputFiles.contains(outFile)) { 692 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile); 693 return null; 694 } else { 695 try (BufferedWriter out = new BufferedWriter(outFile.openWriter())) { 696 new Pretty(out, true).printUnit(env.toplevel, cdef); 697 if (verbose) 698 log.printVerbose("wrote.file", outFile); 699 } 700 return outFile; 701 } 702 } 703 704 /** Compile a source file that has been accessed by the class finder. 705 * @param c The class the source file of which needs to be compiled. 706 */ 707 private void readSourceFile(ClassSymbol c) throws CompletionFailure { 708 readSourceFile(null, c); 709 } 710 711 /** Compile a ClassSymbol from source, optionally using the given compilation unit as 712 * the source tree. 713 * @param tree the compilation unit in which the given ClassSymbol resides, 714 * or null if should be parsed from source 715 * @param c the ClassSymbol to complete 716 */ 717 public void readSourceFile(JCCompilationUnit tree, ClassSymbol c) throws CompletionFailure { 718 if (completionFailureName == c.fullname) { 719 throw new CompletionFailure(c, "user-selected completion failure by class name"); 720 } 721 JavaFileObject filename = c.classfile; 722 JavaFileObject prev = log.useSource(filename); 723 724 if (tree == null) { 725 try { 726 tree = parse(filename, filename.getCharContent(false)); 727 } catch (IOException e) { 728 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 729 tree = make.TopLevel(List.<JCTree>nil()); 730 } finally { 731 log.useSource(prev); 732 } 733 } 734 735 if (!taskListener.isEmpty()) { 736 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 737 taskListener.started(e); 738 } 739 740 enter.complete(List.of(tree), c); 741 742 if (!taskListener.isEmpty()) { 743 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 744 taskListener.finished(e); 745 } 746 747 if (enter.getEnv(c) == null) { 748 boolean isPkgInfo = 749 tree.sourcefile.isNameCompatible("package-info", 750 JavaFileObject.Kind.SOURCE); 751 if (isPkgInfo) { 752 if (enter.getEnv(tree.packge) == null) { 753 JCDiagnostic diag = 754 diagFactory.fragment("file.does.not.contain.package", 755 c.location()); 756 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 757 } 758 } else { 759 JCDiagnostic diag = 760 diagFactory.fragment("file.doesnt.contain.class", 761 c.getQualifiedName()); 762 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 763 } 764 } 765 766 implicitSourceFilesRead = true; 767 } 768 769 /** Track when the JavaCompiler has been used to compile something. */ 770 private boolean hasBeenUsed = false; 771 private long start_msec = 0; 772 public long elapsed_msec = 0; 773 774 public void compile(List<JavaFileObject> sourceFileObject) 775 throws Throwable { 776 compile(sourceFileObject, List.<String>nil(), null); 777 } 778 779 /** 780 * Main method: compile a list of files, return all compiled classes 781 * 782 * @param sourceFileObjects file objects to be compiled 783 * @param classnames class names to process for annotations 784 * @param processors user provided annotation processors to bypass 785 * discovery, {@code null} means that no processors were provided 786 */ 787 public void compile(Collection<JavaFileObject> sourceFileObjects, 788 Collection<String> classnames, 789 Iterable<? extends Processor> processors) 790 { 791 if (!taskListener.isEmpty()) { 792 taskListener.started(new TaskEvent(TaskEvent.Kind.COMPILATION)); 793 } 794 795 if (processors != null && processors.iterator().hasNext()) 796 explicitAnnotationProcessingRequested = true; 797 // as a JavaCompiler can only be used once, throw an exception if 798 // it has been used before. 799 if (hasBeenUsed) 800 checkReusable(); 801 hasBeenUsed = true; 802 803 // forcibly set the equivalent of -Xlint:-options, so that no further 804 // warnings about command line options are generated from this point on 805 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true"); 806 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option); 807 808 start_msec = now(); 809 810 try { 811 initProcessAnnotations(processors); 812 813 // These method calls must be chained to avoid memory leaks 814 processAnnotations( 815 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))), 816 classnames); 817 818 // If it's safe to do so, skip attr / flow / gen for implicit classes 819 if (taskListener.isEmpty() && 820 implicitSourcePolicy == ImplicitSourcePolicy.NONE) { 821 todo.retainFiles(inputFiles); 822 } 823 824 switch (compilePolicy) { 825 case ATTR_ONLY: 826 attribute(todo); 827 break; 828 829 case CHECK_ONLY: 830 flow(attribute(todo)); 831 break; 832 833 case SIMPLE: 834 generate(desugar(flow(attribute(todo)))); 835 break; 836 837 case BY_FILE: { 838 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile(); 839 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) { 840 generate(desugar(flow(attribute(q.remove())))); 841 } 842 } 843 break; 844 845 case BY_TODO: 846 while (!todo.isEmpty()) 847 generate(desugar(flow(attribute(todo.remove())))); 848 break; 849 850 default: 851 Assert.error("unknown compile policy"); 852 } 853 } catch (Abort ex) { 854 if (devVerbose) 855 ex.printStackTrace(System.err); 856 } finally { 857 if (verbose) { 858 elapsed_msec = elapsed(start_msec); 859 log.printVerbose("total", Long.toString(elapsed_msec)); 860 } 861 862 reportDeferredDiagnostics(); 863 864 if (!log.hasDiagnosticListener()) { 865 printCount("error", errorCount()); 866 printCount("warn", warningCount()); 867 } 868 if (!taskListener.isEmpty()) { 869 taskListener.finished(new TaskEvent(TaskEvent.Kind.COMPILATION)); 870 } 871 close(); 872 if (procEnvImpl != null) 873 procEnvImpl.close(); 874 } 875 } 876 877 protected void checkReusable() { 878 throw new AssertionError("attempt to reuse JavaCompiler"); 879 } 880 881 /** 882 * The list of classes explicitly supplied on the command line for compilation. 883 * Not always populated. 884 */ 885 private List<JCClassDecl> rootClasses; 886 887 /** 888 * Parses a list of files. 889 */ 890 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) { 891 if (shouldStop(CompileState.PARSE)) 892 return List.nil(); 893 894 //parse all files 895 ListBuffer<JCCompilationUnit> trees = new ListBuffer<>(); 896 Set<JavaFileObject> filesSoFar = new HashSet<>(); 897 for (JavaFileObject fileObject : fileObjects) { 898 if (!filesSoFar.contains(fileObject)) { 899 filesSoFar.add(fileObject); 900 trees.append(parse(fileObject)); 901 } 902 } 903 return trees.toList(); 904 } 905 906 /** 907 * Enter the symbols found in a list of parse trees if the compilation 908 * is expected to proceed beyond anno processing into attr. 909 * As a side-effect, this puts elements on the "todo" list. 910 * Also stores a list of all top level classes in rootClasses. 911 */ 912 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) { 913 if (shouldStop(CompileState.ATTR)) 914 return List.nil(); 915 return enterTrees(roots); 916 } 917 918 /** 919 * Enter the symbols found in a list of parse trees. 920 * As a side-effect, this puts elements on the "todo" list. 921 * Also stores a list of all top level classes in rootClasses. 922 */ 923 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) { 924 //enter symbols for all files 925 if (!taskListener.isEmpty()) { 926 for (JCCompilationUnit unit: roots) { 927 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 928 taskListener.started(e); 929 } 930 } 931 932 enter.main(roots); 933 934 if (!taskListener.isEmpty()) { 935 for (JCCompilationUnit unit: roots) { 936 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 937 taskListener.finished(e); 938 } 939 } 940 941 // If generating source, or if tracking public apis, 942 // then remember the classes declared in 943 // the original compilation units listed on the command line. 944 if (sourceOutput) { 945 ListBuffer<JCClassDecl> cdefs = new ListBuffer<>(); 946 for (JCCompilationUnit unit : roots) { 947 for (List<JCTree> defs = unit.defs; 948 defs.nonEmpty(); 949 defs = defs.tail) { 950 if (defs.head instanceof JCClassDecl) 951 cdefs.append((JCClassDecl)defs.head); 952 } 953 } 954 rootClasses = cdefs.toList(); 955 } 956 957 // Ensure the input files have been recorded. Although this is normally 958 // done by readSource, it may not have been done if the trees were read 959 // in a prior round of annotation processing, and the trees have been 960 // cleaned and are being reused. 961 for (JCCompilationUnit unit : roots) { 962 inputFiles.add(unit.sourcefile); 963 } 964 965 return roots; 966 } 967 968 /** 969 * Set to true to enable skeleton annotation processing code. 970 * Currently, we assume this variable will be replaced more 971 * advanced logic to figure out if annotation processing is 972 * needed. 973 */ 974 boolean processAnnotations = false; 975 976 Log.DeferredDiagnosticHandler deferredDiagnosticHandler; 977 978 /** 979 * Object to handle annotation processing. 980 */ 981 private JavacProcessingEnvironment procEnvImpl = null; 982 983 /** 984 * Check if we should process annotations. 985 * If so, and if no scanner is yet registered, then set up the DocCommentScanner 986 * to catch doc comments, and set keepComments so the parser records them in 987 * the compilation unit. 988 * 989 * @param processors user provided annotation processors to bypass 990 * discovery, {@code null} means that no processors were provided 991 */ 992 public void initProcessAnnotations(Iterable<? extends Processor> processors) { 993 // Process annotations if processing is not disabled and there 994 // is at least one Processor available. 995 if (options.isSet(PROC, "none")) { 996 processAnnotations = false; 997 } else if (procEnvImpl == null) { 998 procEnvImpl = JavacProcessingEnvironment.instance(context); 999 procEnvImpl.setProcessors(processors); 1000 processAnnotations = procEnvImpl.atLeastOneProcessor(); 1001 1002 if (processAnnotations) { 1003 options.put("save-parameter-names", "save-parameter-names"); 1004 reader.saveParameterNames = true; 1005 keepComments = true; 1006 genEndPos = true; 1007 if (!taskListener.isEmpty()) 1008 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING)); 1009 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log); 1010 } else { // free resources 1011 procEnvImpl.close(); 1012 } 1013 } 1014 } 1015 1016 // TODO: called by JavacTaskImpl 1017 public void processAnnotations(List<JCCompilationUnit> roots) { 1018 processAnnotations(roots, List.<String>nil()); 1019 } 1020 1021 /** 1022 * Process any annotations found in the specified compilation units. 1023 * @param roots a list of compilation units 1024 */ 1025 // Implementation note: when this method is called, log.deferredDiagnostics 1026 // will have been set true by initProcessAnnotations, meaning that any diagnostics 1027 // that are reported will go into the log.deferredDiagnostics queue. 1028 // By the time this method exits, log.deferDiagnostics must be set back to false, 1029 // and all deferredDiagnostics must have been handled: i.e. either reported 1030 // or determined to be transient, and therefore suppressed. 1031 public void processAnnotations(List<JCCompilationUnit> roots, 1032 Collection<String> classnames) { 1033 if (shouldStop(CompileState.PROCESS)) { 1034 // Errors were encountered. 1035 // Unless all the errors are resolve errors, the errors were parse errors 1036 // or other errors during enter which cannot be fixed by running 1037 // any annotation processors. 1038 if (unrecoverableError()) { 1039 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1040 log.popDiagnosticHandler(deferredDiagnosticHandler); 1041 return ; 1042 } 1043 } 1044 1045 // ASSERT: processAnnotations and procEnvImpl should have been set up by 1046 // by initProcessAnnotations 1047 1048 // NOTE: The !classnames.isEmpty() checks should be refactored to Main. 1049 1050 if (!processAnnotations) { 1051 // If there are no annotation processors present, and 1052 // annotation processing is to occur with compilation, 1053 // emit a warning. 1054 if (options.isSet(PROC, "only")) { 1055 log.warning("proc.proc-only.requested.no.procs"); 1056 todo.clear(); 1057 } 1058 // If not processing annotations, classnames must be empty 1059 if (!classnames.isEmpty()) { 1060 log.error("proc.no.explicit.annotation.processing.requested", 1061 classnames); 1062 } 1063 Assert.checkNull(deferredDiagnosticHandler); 1064 return ; // continue regular compilation 1065 } 1066 1067 Assert.checkNonNull(deferredDiagnosticHandler); 1068 1069 try { 1070 List<ClassSymbol> classSymbols = List.nil(); 1071 List<PackageSymbol> pckSymbols = List.nil(); 1072 if (!classnames.isEmpty()) { 1073 // Check for explicit request for annotation 1074 // processing 1075 if (!explicitAnnotationProcessingRequested()) { 1076 log.error("proc.no.explicit.annotation.processing.requested", 1077 classnames); 1078 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1079 log.popDiagnosticHandler(deferredDiagnosticHandler); 1080 return ; // TODO: Will this halt compilation? 1081 } else { 1082 boolean errors = false; 1083 for (String nameStr : classnames) { 1084 Symbol sym = resolveBinaryNameOrIdent(nameStr); 1085 if (sym == null || 1086 (sym.kind == PCK && !processPcks) || 1087 sym.kind == ABSENT_TYP) { 1088 log.error("proc.cant.find.class", nameStr); 1089 errors = true; 1090 continue; 1091 } 1092 try { 1093 if (sym.kind == PCK) 1094 sym.complete(); 1095 if (sym.exists()) { 1096 if (sym.kind == PCK) 1097 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1098 else 1099 classSymbols = classSymbols.prepend((ClassSymbol)sym); 1100 continue; 1101 } 1102 Assert.check(sym.kind == PCK); 1103 log.warning("proc.package.does.not.exist", nameStr); 1104 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1105 } catch (CompletionFailure e) { 1106 log.error("proc.cant.find.class", nameStr); 1107 errors = true; 1108 continue; 1109 } 1110 } 1111 if (errors) { 1112 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1113 log.popDiagnosticHandler(deferredDiagnosticHandler); 1114 return ; 1115 } 1116 } 1117 } 1118 try { 1119 annotationProcessingOccurred = 1120 procEnvImpl.doProcessing(roots, 1121 classSymbols, 1122 pckSymbols, 1123 deferredDiagnosticHandler); 1124 // doProcessing will have handled deferred diagnostics 1125 } finally { 1126 procEnvImpl.close(); 1127 } 1128 } catch (CompletionFailure ex) { 1129 log.error("cant.access", ex.sym, ex.getDetailValue()); 1130 if (deferredDiagnosticHandler != null) { 1131 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1132 log.popDiagnosticHandler(deferredDiagnosticHandler); 1133 } 1134 } 1135 } 1136 1137 private boolean unrecoverableError() { 1138 if (deferredDiagnosticHandler != null) { 1139 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) { 1140 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE)) 1141 return true; 1142 } 1143 } 1144 return false; 1145 } 1146 1147 boolean explicitAnnotationProcessingRequested() { 1148 return 1149 explicitAnnotationProcessingRequested || 1150 explicitAnnotationProcessingRequested(options); 1151 } 1152 1153 static boolean explicitAnnotationProcessingRequested(Options options) { 1154 return 1155 options.isSet(PROCESSOR) || 1156 options.isSet(PROCESSORPATH) || 1157 options.isSet(PROC, "only") || 1158 options.isSet(XPRINT); 1159 } 1160 1161 public void setDeferredDiagnosticHandler(Log.DeferredDiagnosticHandler deferredDiagnosticHandler) { 1162 this.deferredDiagnosticHandler = deferredDiagnosticHandler; 1163 } 1164 1165 /** 1166 * Attribute a list of parse trees, such as found on the "todo" list. 1167 * Note that attributing classes may cause additional files to be 1168 * parsed and entered via the SourceCompleter. 1169 * Attribution of the entries in the list does not stop if any errors occur. 1170 * @return a list of environments for attribute classes. 1171 */ 1172 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) { 1173 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1174 while (!envs.isEmpty()) 1175 results.append(attribute(envs.remove())); 1176 return stopIfError(CompileState.ATTR, results); 1177 } 1178 1179 /** 1180 * Attribute a parse tree. 1181 * @return the attributed parse tree 1182 */ 1183 public Env<AttrContext> attribute(Env<AttrContext> env) { 1184 if (compileStates.isDone(env, CompileState.ATTR)) 1185 return env; 1186 1187 if (verboseCompilePolicy) 1188 printNote("[attribute " + env.enclClass.sym + "]"); 1189 if (verbose) 1190 log.printVerbose("checking.attribution", env.enclClass.sym); 1191 1192 if (!taskListener.isEmpty()) { 1193 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1194 taskListener.started(e); 1195 } 1196 1197 JavaFileObject prev = log.useSource( 1198 env.enclClass.sym.sourcefile != null ? 1199 env.enclClass.sym.sourcefile : 1200 env.toplevel.sourcefile); 1201 try { 1202 attr.attrib(env); 1203 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) { 1204 //if in fail-over mode, ensure that AST expression nodes 1205 //are correctly initialized (e.g. they have a type/symbol) 1206 attr.postAttr(env.tree); 1207 } 1208 compileStates.put(env, CompileState.ATTR); 1209 } 1210 finally { 1211 log.useSource(prev); 1212 } 1213 1214 return env; 1215 } 1216 1217 /** 1218 * Perform dataflow checks on attributed parse trees. 1219 * These include checks for definite assignment and unreachable statements. 1220 * If any errors occur, an empty list will be returned. 1221 * @return the list of attributed parse trees 1222 */ 1223 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) { 1224 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1225 for (Env<AttrContext> env: envs) { 1226 flow(env, results); 1227 } 1228 return stopIfError(CompileState.FLOW, results); 1229 } 1230 1231 /** 1232 * Perform dataflow checks on an attributed parse tree. 1233 */ 1234 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) { 1235 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1236 flow(env, results); 1237 return stopIfError(CompileState.FLOW, results); 1238 } 1239 1240 /** 1241 * Perform dataflow checks on an attributed parse tree. 1242 */ 1243 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) { 1244 if (compileStates.isDone(env, CompileState.FLOW)) { 1245 results.add(env); 1246 return; 1247 } 1248 1249 try { 1250 if (shouldStop(CompileState.FLOW)) 1251 return; 1252 1253 if (verboseCompilePolicy) 1254 printNote("[flow " + env.enclClass.sym + "]"); 1255 JavaFileObject prev = log.useSource( 1256 env.enclClass.sym.sourcefile != null ? 1257 env.enclClass.sym.sourcefile : 1258 env.toplevel.sourcefile); 1259 try { 1260 make.at(Position.FIRSTPOS); 1261 TreeMaker localMake = make.forToplevel(env.toplevel); 1262 flow.analyzeTree(env, localMake); 1263 compileStates.put(env, CompileState.FLOW); 1264 1265 if (shouldStop(CompileState.FLOW)) 1266 return; 1267 1268 results.add(env); 1269 } 1270 finally { 1271 log.useSource(prev); 1272 } 1273 } 1274 finally { 1275 if (!taskListener.isEmpty()) { 1276 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1277 taskListener.finished(e); 1278 } 1279 } 1280 } 1281 1282 /** 1283 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1284 * for source or code generation. 1285 * If any errors occur, an empty list will be returned. 1286 * @return a list containing the classes to be generated 1287 */ 1288 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) { 1289 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = new ListBuffer<>(); 1290 for (Env<AttrContext> env: envs) 1291 desugar(env, results); 1292 return stopIfError(CompileState.FLOW, results); 1293 } 1294 1295 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs = new HashMap<>(); 1296 1297 /** 1298 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1299 * for source or code generation. If the file was not listed on the command line, 1300 * the current implicitSourcePolicy is taken into account. 1301 * The preparation stops as soon as an error is found. 1302 */ 1303 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) { 1304 if (shouldStop(CompileState.TRANSTYPES)) 1305 return; 1306 1307 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE 1308 && !inputFiles.contains(env.toplevel.sourcefile)) { 1309 return; 1310 } 1311 1312 if (compileStates.isDone(env, CompileState.LOWER)) { 1313 results.addAll(desugaredEnvs.get(env)); 1314 return; 1315 } 1316 1317 /** 1318 * Ensure that superclasses of C are desugared before C itself. This is 1319 * required for two reasons: (i) as erasure (TransTypes) destroys 1320 * information needed in flow analysis and (ii) as some checks carried 1321 * out during lowering require that all synthetic fields/methods have 1322 * already been added to C and its superclasses. 1323 */ 1324 class ScanNested extends TreeScanner { 1325 Set<Env<AttrContext>> dependencies = new LinkedHashSet<>(); 1326 protected boolean hasLambdas; 1327 @Override 1328 public void visitClassDef(JCClassDecl node) { 1329 Type st = types.supertype(node.sym.type); 1330 boolean envForSuperTypeFound = false; 1331 while (!envForSuperTypeFound && st.hasTag(CLASS)) { 1332 ClassSymbol c = st.tsym.outermostClass(); 1333 Env<AttrContext> stEnv = enter.getEnv(c); 1334 if (stEnv != null && env != stEnv) { 1335 if (dependencies.add(stEnv)) { 1336 boolean prevHasLambdas = hasLambdas; 1337 try { 1338 scan(stEnv.tree); 1339 } finally { 1340 /* 1341 * ignore any updates to hasLambdas made during 1342 * the nested scan, this ensures an initalized 1343 * LambdaToMethod is available only to those 1344 * classes that contain lambdas 1345 */ 1346 hasLambdas = prevHasLambdas; 1347 } 1348 } 1349 envForSuperTypeFound = true; 1350 } 1351 st = types.supertype(st); 1352 } 1353 super.visitClassDef(node); 1354 } 1355 @Override 1356 public void visitLambda(JCLambda tree) { 1357 hasLambdas = true; 1358 super.visitLambda(tree); 1359 } 1360 @Override 1361 public void visitReference(JCMemberReference tree) { 1362 hasLambdas = true; 1363 super.visitReference(tree); 1364 } 1365 } 1366 ScanNested scanner = new ScanNested(); 1367 scanner.scan(env.tree); 1368 for (Env<AttrContext> dep: scanner.dependencies) { 1369 if (!compileStates.isDone(dep, CompileState.FLOW)) 1370 desugaredEnvs.put(dep, desugar(flow(attribute(dep)))); 1371 } 1372 1373 //We need to check for error another time as more classes might 1374 //have been attributed and analyzed at this stage 1375 if (shouldStop(CompileState.TRANSTYPES)) 1376 return; 1377 1378 if (verboseCompilePolicy) 1379 printNote("[desugar " + env.enclClass.sym + "]"); 1380 1381 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1382 env.enclClass.sym.sourcefile : 1383 env.toplevel.sourcefile); 1384 try { 1385 //save tree prior to rewriting 1386 JCTree untranslated = env.tree; 1387 1388 make.at(Position.FIRSTPOS); 1389 TreeMaker localMake = make.forToplevel(env.toplevel); 1390 1391 if (env.tree.hasTag(JCTree.Tag.PACKAGEDEF)) { 1392 if (!(sourceOutput)) { 1393 if (shouldStop(CompileState.LOWER)) 1394 return; 1395 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake); 1396 if (pdef.head != null) { 1397 Assert.check(pdef.tail.isEmpty()); 1398 results.add(new Pair<>(env, (JCClassDecl)pdef.head)); 1399 } 1400 } 1401 return; 1402 } 1403 1404 if (shouldStop(CompileState.TRANSTYPES)) 1405 return; 1406 1407 env.tree = transTypes.translateTopLevelClass(env.tree, localMake); 1408 compileStates.put(env, CompileState.TRANSTYPES); 1409 1410 if (source.allowLambda() && scanner.hasLambdas) { 1411 if (shouldStop(CompileState.UNLAMBDA)) 1412 return; 1413 1414 env.tree = LambdaToMethod.instance(context).translateTopLevelClass(env, env.tree, localMake); 1415 compileStates.put(env, CompileState.UNLAMBDA); 1416 } 1417 1418 if (shouldStop(CompileState.LOWER)) 1419 return; 1420 1421 if (sourceOutput) { 1422 //emit standard Java source file, only for compilation 1423 //units enumerated explicitly on the command line 1424 JCClassDecl cdef = (JCClassDecl)env.tree; 1425 if (untranslated instanceof JCClassDecl && 1426 rootClasses.contains((JCClassDecl)untranslated)) { 1427 results.add(new Pair<>(env, cdef)); 1428 } 1429 return; 1430 } 1431 1432 //translate out inner classes 1433 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake); 1434 compileStates.put(env, CompileState.LOWER); 1435 1436 if (shouldStop(CompileState.LOWER)) 1437 return; 1438 1439 //generate code for each class 1440 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) { 1441 JCClassDecl cdef = (JCClassDecl)l.head; 1442 results.add(new Pair<>(env, cdef)); 1443 } 1444 } 1445 finally { 1446 log.useSource(prev); 1447 } 1448 1449 } 1450 1451 /** Generates the source or class file for a list of classes. 1452 * The decision to generate a source file or a class file is 1453 * based upon the compiler's options. 1454 * Generation stops if an error occurs while writing files. 1455 */ 1456 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) { 1457 generate(queue, null); 1458 } 1459 1460 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) { 1461 if (shouldStop(CompileState.GENERATE)) 1462 return; 1463 1464 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) { 1465 Env<AttrContext> env = x.fst; 1466 JCClassDecl cdef = x.snd; 1467 1468 if (verboseCompilePolicy) { 1469 printNote("[generate " + (sourceOutput ? " source" : "code") + " " + cdef.sym + "]"); 1470 } 1471 1472 if (!taskListener.isEmpty()) { 1473 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1474 taskListener.started(e); 1475 } 1476 1477 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1478 env.enclClass.sym.sourcefile : 1479 env.toplevel.sourcefile); 1480 try { 1481 JavaFileObject file; 1482 if (sourceOutput) { 1483 file = printSource(env, cdef); 1484 } else { 1485 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT) 1486 && jniWriter.needsHeader(cdef.sym)) { 1487 jniWriter.write(cdef.sym); 1488 } 1489 file = genCode(env, cdef); 1490 } 1491 if (results != null && file != null) 1492 results.add(file); 1493 } catch (IOException ex) { 1494 log.error(cdef.pos(), "class.cant.write", 1495 cdef.sym, ex.getMessage()); 1496 return; 1497 } finally { 1498 log.useSource(prev); 1499 } 1500 1501 if (!taskListener.isEmpty()) { 1502 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1503 taskListener.finished(e); 1504 } 1505 } 1506 } 1507 1508 // where 1509 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) { 1510 // use a LinkedHashMap to preserve the order of the original list as much as possible 1511 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<>(); 1512 for (Env<AttrContext> env: envs) { 1513 Queue<Env<AttrContext>> sublist = map.get(env.toplevel); 1514 if (sublist == null) { 1515 sublist = new ListBuffer<>(); 1516 map.put(env.toplevel, sublist); 1517 } 1518 sublist.add(env); 1519 } 1520 return map; 1521 } 1522 1523 JCClassDecl removeMethodBodies(JCClassDecl cdef) { 1524 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0; 1525 class MethodBodyRemover extends TreeTranslator { 1526 @Override 1527 public void visitMethodDef(JCMethodDecl tree) { 1528 tree.mods.flags &= ~Flags.SYNCHRONIZED; 1529 for (JCVariableDecl vd : tree.params) 1530 vd.mods.flags &= ~Flags.FINAL; 1531 tree.body = null; 1532 super.visitMethodDef(tree); 1533 } 1534 @Override 1535 public void visitVarDef(JCVariableDecl tree) { 1536 if (tree.init != null && tree.init.type.constValue() == null) 1537 tree.init = null; 1538 super.visitVarDef(tree); 1539 } 1540 @Override 1541 public void visitClassDef(JCClassDecl tree) { 1542 ListBuffer<JCTree> newdefs = new ListBuffer<>(); 1543 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) { 1544 JCTree t = it.head; 1545 switch (t.getTag()) { 1546 case CLASSDEF: 1547 if (isInterface || 1548 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1549 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1550 newdefs.append(t); 1551 break; 1552 case METHODDEF: 1553 if (isInterface || 1554 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1555 ((JCMethodDecl) t).sym.name == names.init || 1556 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1557 newdefs.append(t); 1558 break; 1559 case VARDEF: 1560 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1561 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1562 newdefs.append(t); 1563 break; 1564 default: 1565 break; 1566 } 1567 } 1568 tree.defs = newdefs.toList(); 1569 super.visitClassDef(tree); 1570 } 1571 } 1572 MethodBodyRemover r = new MethodBodyRemover(); 1573 return r.translate(cdef); 1574 } 1575 1576 public void reportDeferredDiagnostics() { 1577 if (errorCount() == 0 1578 && annotationProcessingOccurred 1579 && implicitSourceFilesRead 1580 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) { 1581 if (explicitAnnotationProcessingRequested()) 1582 log.warning("proc.use.implicit"); 1583 else 1584 log.warning("proc.use.proc.or.implicit"); 1585 } 1586 chk.reportDeferredDiagnostics(); 1587 if (log.compressedOutput) { 1588 log.mandatoryNote(null, "compressed.diags"); 1589 } 1590 } 1591 1592 /** Close the compiler, flushing the logs 1593 */ 1594 public void close() { 1595 rootClasses = null; 1596 finder = null; 1597 reader = null; 1598 make = null; 1599 writer = null; 1600 enter = null; 1601 if (todo != null) 1602 todo.clear(); 1603 todo = null; 1604 parserFactory = null; 1605 syms = null; 1606 source = null; 1607 attr = null; 1608 chk = null; 1609 gen = null; 1610 flow = null; 1611 transTypes = null; 1612 lower = null; 1613 annotate = null; 1614 types = null; 1615 1616 log.flush(); 1617 try { 1618 fileManager.flush(); 1619 } catch (IOException e) { 1620 throw new Abort(e); 1621 } finally { 1622 if (names != null) 1623 names.dispose(); 1624 names = null; 1625 1626 for (Closeable c: closeables) { 1627 try { 1628 c.close(); 1629 } catch (IOException e) { 1630 // When javac uses JDK 7 as a baseline, this code would be 1631 // better written to set any/all exceptions from all the 1632 // Closeables as suppressed exceptions on the FatalError 1633 // that is thrown. 1634 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close"); 1635 throw new FatalError(msg, e); 1636 } 1637 } 1638 closeables = List.nil(); 1639 } 1640 } 1641 1642 protected void printNote(String lines) { 1643 log.printRawLines(Log.WriterKind.NOTICE, lines); 1644 } 1645 1646 /** Print numbers of errors and warnings. 1647 */ 1648 public void printCount(String kind, int count) { 1649 if (count != 0) { 1650 String key; 1651 if (count == 1) 1652 key = "count." + kind; 1653 else 1654 key = "count." + kind + ".plural"; 1655 log.printLines(WriterKind.ERROR, key, String.valueOf(count)); 1656 log.flush(Log.WriterKind.ERROR); 1657 } 1658 } 1659 1660 private static long now() { 1661 return System.currentTimeMillis(); 1662 } 1663 1664 private static long elapsed(long then) { 1665 return now() - then; 1666 } 1667 1668 public void newRound() { 1669 inputFiles.clear(); 1670 todo.clear(); 1671 } 1672} 1673