JavaCompiler.java revision 3019:176472b94f2e
1/* 2 * Copyright (c) 1999, 2014, 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 Target target = Target.instance(context); 377 attr = Attr.instance(context); 378 chk = Check.instance(context); 379 gen = Gen.instance(context); 380 flow = Flow.instance(context); 381 transTypes = TransTypes.instance(context); 382 lower = Lower.instance(context); 383 annotate = Annotate.instance(context); 384 types = Types.instance(context); 385 taskListener = MultiTaskListener.instance(context); 386 387 finder.sourceCompleter = sourceCompleter; 388 389 options = Options.instance(context); 390 391 verbose = options.isSet(VERBOSE); 392 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s 393 stubOutput = options.isSet("-stubs"); 394 relax = options.isSet("-relax"); 395 printFlat = options.isSet("-printflat"); 396 attrParseOnly = options.isSet("-attrparseonly"); 397 encoding = options.get(ENCODING); 398 lineDebugInfo = options.isUnset(G_CUSTOM) || 399 options.isSet(G_CUSTOM, "lines"); 400 genEndPos = options.isSet(XJCOV) || 401 context.get(DiagnosticListener.class) != null; 402 devVerbose = options.isSet("dev"); 403 processPcks = options.isSet("process.packages"); 404 werror = options.isSet(WERROR); 405 406 verboseCompilePolicy = options.isSet("verboseCompilePolicy"); 407 408 if (attrParseOnly) 409 compilePolicy = CompilePolicy.ATTR_ONLY; 410 else 411 compilePolicy = CompilePolicy.decode(options.get("compilePolicy")); 412 413 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit")); 414 415 completionFailureName = 416 options.isSet("failcomplete") 417 ? names.fromString(options.get("failcomplete")) 418 : null; 419 420 shouldStopPolicyIfError = 421 options.isSet("shouldStopPolicy") // backwards compatible 422 ? CompileState.valueOf(options.get("shouldStopPolicy")) 423 : options.isSet("shouldStopPolicyIfError") 424 ? CompileState.valueOf(options.get("shouldStopPolicyIfError")) 425 : CompileState.INIT; 426 shouldStopPolicyIfNoError = 427 options.isSet("shouldStopPolicyIfNoError") 428 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError")) 429 : CompileState.GENERATE; 430 431 if (options.isUnset("oldDiags")) 432 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context)); 433 434 PlatformDescription platformProvider = context.get(PlatformDescription.class); 435 436 if (platformProvider != null) 437 closeables = closeables.prepend(platformProvider); 438 } 439 440 /* Switches: 441 */ 442 443 /** Verbose output. 444 */ 445 public boolean verbose; 446 447 /** Emit plain Java source files rather than class files. 448 */ 449 public boolean sourceOutput; 450 451 /** Emit stub source files rather than class files. 452 */ 453 public boolean stubOutput; 454 455 /** Generate attributed parse tree only. 456 */ 457 public boolean attrParseOnly; 458 459 /** Switch: relax some constraints for producing the jsr14 prototype. 460 */ 461 boolean relax; 462 463 /** Debug switch: Emit Java sources after inner class flattening. 464 */ 465 public boolean printFlat; 466 467 /** The encoding to be used for source input. 468 */ 469 public String encoding; 470 471 /** Generate code with the LineNumberTable attribute for debugging 472 */ 473 public boolean lineDebugInfo; 474 475 /** Switch: should we store the ending positions? 476 */ 477 public boolean genEndPos; 478 479 /** Switch: should we debug ignored exceptions 480 */ 481 protected boolean devVerbose; 482 483 /** Switch: should we (annotation) process packages as well 484 */ 485 protected boolean processPcks; 486 487 /** Switch: treat warnings as errors 488 */ 489 protected boolean werror; 490 491 /** Switch: is annotation processing requested explicitly via 492 * CompilationTask.setProcessors? 493 */ 494 protected boolean explicitAnnotationProcessingRequested = false; 495 496 /** 497 * The policy for the order in which to perform the compilation 498 */ 499 protected CompilePolicy compilePolicy; 500 501 /** 502 * The policy for what to do with implicitly read source files 503 */ 504 protected ImplicitSourcePolicy implicitSourcePolicy; 505 506 /** 507 * Report activity related to compilePolicy 508 */ 509 public boolean verboseCompilePolicy; 510 511 /** 512 * Policy of how far to continue compilation after errors have occurred. 513 * Set this to minimum CompileState (INIT) to stop as soon as possible 514 * after errors. 515 */ 516 public CompileState shouldStopPolicyIfError; 517 518 /** 519 * Policy of how far to continue compilation when no errors have occurred. 520 * Set this to maximum CompileState (GENERATE) to perform full compilation. 521 * Set this lower to perform partial compilation, such as -proc:only. 522 */ 523 public CompileState shouldStopPolicyIfNoError; 524 525 /** A queue of all as yet unattributed classes. 526 */ 527 public Todo todo; 528 529 /** A list of items to be closed when the compilation is complete. 530 */ 531 public List<Closeable> closeables = List.nil(); 532 533 /** The set of currently compiled inputfiles, needed to ensure 534 * we don't accidentally overwrite an input file when -s is set. 535 * initialized by `compile'. 536 */ 537 protected Set<JavaFileObject> inputFiles = new HashSet<>(); 538 539 protected boolean shouldStop(CompileState cs) { 540 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError()) 541 ? shouldStopPolicyIfError 542 : shouldStopPolicyIfNoError; 543 return cs.isAfter(shouldStopPolicy); 544 } 545 546 /** The number of errors reported so far. 547 */ 548 public int errorCount() { 549 if (werror && log.nerrors == 0 && log.nwarnings > 0) { 550 log.error("warnings.and.werror"); 551 } 552 return log.nerrors; 553 } 554 555 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) { 556 return shouldStop(cs) ? new ListBuffer<T>() : queue; 557 } 558 559 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) { 560 return shouldStop(cs) ? List.<T>nil() : list; 561 } 562 563 /** The number of warnings reported so far. 564 */ 565 public int warningCount() { 566 return log.nwarnings; 567 } 568 569 /** Try to open input stream with given name. 570 * Report an error if this fails. 571 * @param filename The file name of the input stream to be opened. 572 */ 573 public CharSequence readSource(JavaFileObject filename) { 574 try { 575 inputFiles.add(filename); 576 return filename.getCharContent(false); 577 } catch (IOException e) { 578 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 579 return null; 580 } 581 } 582 583 /** Parse contents of input stream. 584 * @param filename The name of the file from which input stream comes. 585 * @param content The characters to be parsed. 586 */ 587 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) { 588 long msec = now(); 589 JCCompilationUnit tree = make.TopLevel(List.<JCTree>nil()); 590 if (content != null) { 591 if (verbose) { 592 log.printVerbose("parsing.started", filename); 593 } 594 if (!taskListener.isEmpty()) { 595 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename); 596 taskListener.started(e); 597 keepComments = true; 598 genEndPos = true; 599 } 600 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo); 601 tree = parser.parseCompilationUnit(); 602 if (verbose) { 603 log.printVerbose("parsing.done", Long.toString(elapsed(msec))); 604 } 605 } 606 607 tree.sourcefile = filename; 608 609 if (content != null && !taskListener.isEmpty()) { 610 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree); 611 taskListener.finished(e); 612 } 613 614 return tree; 615 } 616 // where 617 public boolean keepComments = false; 618 protected boolean keepComments() { 619 return keepComments || sourceOutput || stubOutput; 620 } 621 622 623 /** Parse contents of file. 624 * @param filename The name of the file to be parsed. 625 */ 626 @Deprecated 627 public JCTree.JCCompilationUnit parse(String filename) { 628 JavacFileManager fm = (JavacFileManager)fileManager; 629 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next()); 630 } 631 632 /** Parse contents of file. 633 * @param filename The name of the file to be parsed. 634 */ 635 public JCTree.JCCompilationUnit parse(JavaFileObject filename) { 636 JavaFileObject prev = log.useSource(filename); 637 try { 638 JCTree.JCCompilationUnit t = parse(filename, readSource(filename)); 639 if (t.endPositions != null) 640 log.setEndPosTable(filename, t.endPositions); 641 return t; 642 } finally { 643 log.useSource(prev); 644 } 645 } 646 647 /** Resolve an identifier which may be the binary name of a class or 648 * the Java name of a class or package. 649 * @param name The name to resolve 650 */ 651 public Symbol resolveBinaryNameOrIdent(String name) { 652 try { 653 Name flatname = names.fromString(name.replace("/", ".")); 654 return finder.loadClass(flatname); 655 } catch (CompletionFailure ignore) { 656 return resolveIdent(name); 657 } 658 } 659 660 /** Resolve an identifier. 661 * @param name The identifier to resolve 662 */ 663 public Symbol resolveIdent(String name) { 664 if (name.equals("")) 665 return syms.errSymbol; 666 JavaFileObject prev = log.useSource(null); 667 try { 668 JCExpression tree = null; 669 for (String s : name.split("\\.", -1)) { 670 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords 671 return syms.errSymbol; 672 tree = (tree == null) ? make.Ident(names.fromString(s)) 673 : make.Select(tree, names.fromString(s)); 674 } 675 JCCompilationUnit toplevel = 676 make.TopLevel(List.<JCTree>nil()); 677 toplevel.packge = syms.unnamedPackage; 678 return attr.attribIdent(tree, toplevel); 679 } finally { 680 log.useSource(prev); 681 } 682 } 683 684 /** Emit plain Java source for a class. 685 * @param env The attribution environment of the outermost class 686 * containing this class. 687 * @param cdef The class definition to be printed. 688 */ 689 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 690 JavaFileObject outFile 691 = fileManager.getJavaFileForOutput(CLASS_OUTPUT, 692 cdef.sym.flatname.toString(), 693 JavaFileObject.Kind.SOURCE, 694 null); 695 if (inputFiles.contains(outFile)) { 696 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile); 697 return null; 698 } else { 699 try (BufferedWriter out = new BufferedWriter(outFile.openWriter())) { 700 new Pretty(out, true).printUnit(env.toplevel, cdef); 701 if (verbose) 702 log.printVerbose("wrote.file", outFile); 703 } 704 return outFile; 705 } 706 } 707 708 /** Generate code and emit a class file for a given class 709 * @param env The attribution environment of the outermost class 710 * containing this class. 711 * @param cdef The class definition from which code is generated. 712 */ 713 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException { 714 try { 715 if (gen.genClass(env, cdef) && (errorCount() == 0)) 716 return writer.writeClass(cdef.sym); 717 } catch (ClassWriter.PoolOverflow ex) { 718 log.error(cdef.pos(), "limit.pool"); 719 } catch (ClassWriter.StringOverflow ex) { 720 log.error(cdef.pos(), "limit.string.overflow", 721 ex.value.substring(0, 20)); 722 } catch (CompletionFailure ex) { 723 chk.completionError(cdef.pos(), ex); 724 } 725 return null; 726 } 727 728 /** Compile a source file that has been accessed by the class finder. 729 * @param c The class the source file of which needs to be compiled. 730 */ 731 private void readSourceFile(ClassSymbol c) throws CompletionFailure { 732 readSourceFile(null, c); 733 } 734 735 /** Compile a ClassSymbol from source, optionally using the given compilation unit as 736 * the source tree. 737 * @param tree the compilation unit in which the given ClassSymbol resides, 738 * or null if should be parsed from source 739 * @param c the ClassSymbol to complete 740 */ 741 public void readSourceFile(JCCompilationUnit tree, ClassSymbol c) throws CompletionFailure { 742 if (completionFailureName == c.fullname) { 743 throw new CompletionFailure(c, "user-selected completion failure by class name"); 744 } 745 JavaFileObject filename = c.classfile; 746 JavaFileObject prev = log.useSource(filename); 747 748 if (tree == null) { 749 try { 750 tree = parse(filename, filename.getCharContent(false)); 751 } catch (IOException e) { 752 log.error("error.reading.file", filename, JavacFileManager.getMessage(e)); 753 tree = make.TopLevel(List.<JCTree>nil()); 754 } finally { 755 log.useSource(prev); 756 } 757 } 758 759 if (!taskListener.isEmpty()) { 760 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 761 taskListener.started(e); 762 } 763 764 enter.complete(List.of(tree), c); 765 766 if (!taskListener.isEmpty()) { 767 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree); 768 taskListener.finished(e); 769 } 770 771 if (enter.getEnv(c) == null) { 772 boolean isPkgInfo = 773 tree.sourcefile.isNameCompatible("package-info", 774 JavaFileObject.Kind.SOURCE); 775 if (isPkgInfo) { 776 if (enter.getEnv(tree.packge) == null) { 777 JCDiagnostic diag = 778 diagFactory.fragment("file.does.not.contain.package", 779 c.location()); 780 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 781 } 782 } else { 783 JCDiagnostic diag = 784 diagFactory.fragment("file.doesnt.contain.class", 785 c.getQualifiedName()); 786 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory); 787 } 788 } 789 790 implicitSourceFilesRead = true; 791 } 792 793 /** Track when the JavaCompiler has been used to compile something. */ 794 private boolean hasBeenUsed = false; 795 private long start_msec = 0; 796 public long elapsed_msec = 0; 797 798 public void compile(List<JavaFileObject> sourceFileObject) 799 throws Throwable { 800 compile(sourceFileObject, List.<String>nil(), null); 801 } 802 803 /** 804 * Main method: compile a list of files, return all compiled classes 805 * 806 * @param sourceFileObjects file objects to be compiled 807 * @param classnames class names to process for annotations 808 * @param processors user provided annotation processors to bypass 809 * discovery, {@code null} means that no processors were provided 810 */ 811 public void compile(Collection<JavaFileObject> sourceFileObjects, 812 Collection<String> classnames, 813 Iterable<? extends Processor> processors) 814 { 815 if (!taskListener.isEmpty()) { 816 taskListener.started(new TaskEvent(TaskEvent.Kind.COMPILATION)); 817 } 818 819 if (processors != null && processors.iterator().hasNext()) 820 explicitAnnotationProcessingRequested = true; 821 // as a JavaCompiler can only be used once, throw an exception if 822 // it has been used before. 823 if (hasBeenUsed) 824 checkReusable(); 825 hasBeenUsed = true; 826 827 // forcibly set the equivalent of -Xlint:-options, so that no further 828 // warnings about command line options are generated from this point on 829 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true"); 830 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option); 831 832 start_msec = now(); 833 834 try { 835 initProcessAnnotations(processors); 836 837 // These method calls must be chained to avoid memory leaks 838 processAnnotations( 839 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))), 840 classnames); 841 842 // If it's safe to do so, skip attr / flow / gen for implicit classes 843 if (taskListener.isEmpty() && 844 implicitSourcePolicy == ImplicitSourcePolicy.NONE) { 845 todo.retainFiles(inputFiles); 846 } 847 848 switch (compilePolicy) { 849 case ATTR_ONLY: 850 attribute(todo); 851 break; 852 853 case CHECK_ONLY: 854 flow(attribute(todo)); 855 break; 856 857 case SIMPLE: 858 generate(desugar(flow(attribute(todo)))); 859 break; 860 861 case BY_FILE: { 862 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile(); 863 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) { 864 generate(desugar(flow(attribute(q.remove())))); 865 } 866 } 867 break; 868 869 case BY_TODO: 870 while (!todo.isEmpty()) 871 generate(desugar(flow(attribute(todo.remove())))); 872 break; 873 874 default: 875 Assert.error("unknown compile policy"); 876 } 877 } catch (Abort ex) { 878 if (devVerbose) 879 ex.printStackTrace(System.err); 880 } finally { 881 if (verbose) { 882 elapsed_msec = elapsed(start_msec); 883 log.printVerbose("total", Long.toString(elapsed_msec)); 884 } 885 886 reportDeferredDiagnostics(); 887 888 if (!log.hasDiagnosticListener()) { 889 printCount("error", errorCount()); 890 printCount("warn", warningCount()); 891 } 892 if (!taskListener.isEmpty()) { 893 taskListener.finished(new TaskEvent(TaskEvent.Kind.COMPILATION)); 894 } 895 close(); 896 if (procEnvImpl != null) 897 procEnvImpl.close(); 898 } 899 } 900 901 protected void checkReusable() { 902 throw new AssertionError("attempt to reuse JavaCompiler"); 903 } 904 905 /** 906 * Set needRootClasses to true, in JavaCompiler subclass constructor 907 * that want to collect public apis of classes supplied on the command line. 908 */ 909 protected boolean needRootClasses = false; 910 911 /** 912 * The list of classes explicitly supplied on the command line for compilation. 913 * Not always populated. 914 */ 915 private List<JCClassDecl> rootClasses; 916 917 /** 918 * Parses a list of files. 919 */ 920 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) { 921 if (shouldStop(CompileState.PARSE)) 922 return List.nil(); 923 924 //parse all files 925 ListBuffer<JCCompilationUnit> trees = new ListBuffer<>(); 926 Set<JavaFileObject> filesSoFar = new HashSet<>(); 927 for (JavaFileObject fileObject : fileObjects) { 928 if (!filesSoFar.contains(fileObject)) { 929 filesSoFar.add(fileObject); 930 trees.append(parse(fileObject)); 931 } 932 } 933 return trees.toList(); 934 } 935 936 /** 937 * Enter the symbols found in a list of parse trees if the compilation 938 * is expected to proceed beyond anno processing into attr. 939 * As a side-effect, this puts elements on the "todo" list. 940 * Also stores a list of all top level classes in rootClasses. 941 */ 942 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) { 943 if (shouldStop(CompileState.ATTR)) 944 return List.nil(); 945 return enterTrees(roots); 946 } 947 948 /** 949 * Enter the symbols found in a list of parse trees. 950 * As a side-effect, this puts elements on the "todo" list. 951 * Also stores a list of all top level classes in rootClasses. 952 */ 953 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) { 954 //enter symbols for all files 955 if (!taskListener.isEmpty()) { 956 for (JCCompilationUnit unit: roots) { 957 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 958 taskListener.started(e); 959 } 960 } 961 962 enter.main(roots); 963 964 if (!taskListener.isEmpty()) { 965 for (JCCompilationUnit unit: roots) { 966 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit); 967 taskListener.finished(e); 968 } 969 } 970 971 // If generating source, or if tracking public apis, 972 // then remember the classes declared in 973 // the original compilation units listed on the command line. 974 if (needRootClasses || sourceOutput || stubOutput) { 975 ListBuffer<JCClassDecl> cdefs = new ListBuffer<>(); 976 for (JCCompilationUnit unit : roots) { 977 for (List<JCTree> defs = unit.defs; 978 defs.nonEmpty(); 979 defs = defs.tail) { 980 if (defs.head instanceof JCClassDecl) 981 cdefs.append((JCClassDecl)defs.head); 982 } 983 } 984 rootClasses = cdefs.toList(); 985 } 986 987 // Ensure the input files have been recorded. Although this is normally 988 // done by readSource, it may not have been done if the trees were read 989 // in a prior round of annotation processing, and the trees have been 990 // cleaned and are being reused. 991 for (JCCompilationUnit unit : roots) { 992 inputFiles.add(unit.sourcefile); 993 } 994 995 return roots; 996 } 997 998 /** 999 * Set to true to enable skeleton annotation processing code. 1000 * Currently, we assume this variable will be replaced more 1001 * advanced logic to figure out if annotation processing is 1002 * needed. 1003 */ 1004 boolean processAnnotations = false; 1005 1006 Log.DeferredDiagnosticHandler deferredDiagnosticHandler; 1007 1008 /** 1009 * Object to handle annotation processing. 1010 */ 1011 private JavacProcessingEnvironment procEnvImpl = null; 1012 1013 /** 1014 * Check if we should process annotations. 1015 * If so, and if no scanner is yet registered, then set up the DocCommentScanner 1016 * to catch doc comments, and set keepComments so the parser records them in 1017 * the compilation unit. 1018 * 1019 * @param processors user provided annotation processors to bypass 1020 * discovery, {@code null} means that no processors were provided 1021 */ 1022 public void initProcessAnnotations(Iterable<? extends Processor> processors) { 1023 // Process annotations if processing is not disabled and there 1024 // is at least one Processor available. 1025 if (options.isSet(PROC, "none")) { 1026 processAnnotations = false; 1027 } else if (procEnvImpl == null) { 1028 procEnvImpl = JavacProcessingEnvironment.instance(context); 1029 procEnvImpl.setProcessors(processors); 1030 processAnnotations = procEnvImpl.atLeastOneProcessor(); 1031 1032 if (processAnnotations) { 1033 options.put("save-parameter-names", "save-parameter-names"); 1034 reader.saveParameterNames = true; 1035 keepComments = true; 1036 genEndPos = true; 1037 if (!taskListener.isEmpty()) 1038 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING)); 1039 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log); 1040 } else { // free resources 1041 procEnvImpl.close(); 1042 } 1043 } 1044 } 1045 1046 // TODO: called by JavacTaskImpl 1047 public void processAnnotations(List<JCCompilationUnit> roots) { 1048 processAnnotations(roots, List.<String>nil()); 1049 } 1050 1051 /** 1052 * Process any annotations found in the specified compilation units. 1053 * @param roots a list of compilation units 1054 */ 1055 // Implementation note: when this method is called, log.deferredDiagnostics 1056 // will have been set true by initProcessAnnotations, meaning that any diagnostics 1057 // that are reported will go into the log.deferredDiagnostics queue. 1058 // By the time this method exits, log.deferDiagnostics must be set back to false, 1059 // and all deferredDiagnostics must have been handled: i.e. either reported 1060 // or determined to be transient, and therefore suppressed. 1061 public void processAnnotations(List<JCCompilationUnit> roots, 1062 Collection<String> classnames) { 1063 if (shouldStop(CompileState.PROCESS)) { 1064 // Errors were encountered. 1065 // Unless all the errors are resolve errors, the errors were parse errors 1066 // or other errors during enter which cannot be fixed by running 1067 // any annotation processors. 1068 if (unrecoverableError()) { 1069 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1070 log.popDiagnosticHandler(deferredDiagnosticHandler); 1071 return ; 1072 } 1073 } 1074 1075 // ASSERT: processAnnotations and procEnvImpl should have been set up by 1076 // by initProcessAnnotations 1077 1078 // NOTE: The !classnames.isEmpty() checks should be refactored to Main. 1079 1080 if (!processAnnotations) { 1081 // If there are no annotation processors present, and 1082 // annotation processing is to occur with compilation, 1083 // emit a warning. 1084 if (options.isSet(PROC, "only")) { 1085 log.warning("proc.proc-only.requested.no.procs"); 1086 todo.clear(); 1087 } 1088 // If not processing annotations, classnames must be empty 1089 if (!classnames.isEmpty()) { 1090 log.error("proc.no.explicit.annotation.processing.requested", 1091 classnames); 1092 } 1093 Assert.checkNull(deferredDiagnosticHandler); 1094 return ; // continue regular compilation 1095 } 1096 1097 Assert.checkNonNull(deferredDiagnosticHandler); 1098 1099 try { 1100 List<ClassSymbol> classSymbols = List.nil(); 1101 List<PackageSymbol> pckSymbols = List.nil(); 1102 if (!classnames.isEmpty()) { 1103 // Check for explicit request for annotation 1104 // processing 1105 if (!explicitAnnotationProcessingRequested()) { 1106 log.error("proc.no.explicit.annotation.processing.requested", 1107 classnames); 1108 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1109 log.popDiagnosticHandler(deferredDiagnosticHandler); 1110 return ; // TODO: Will this halt compilation? 1111 } else { 1112 boolean errors = false; 1113 for (String nameStr : classnames) { 1114 Symbol sym = resolveBinaryNameOrIdent(nameStr); 1115 if (sym == null || 1116 (sym.kind == PCK && !processPcks) || 1117 sym.kind == ABSENT_TYP) { 1118 log.error("proc.cant.find.class", nameStr); 1119 errors = true; 1120 continue; 1121 } 1122 try { 1123 if (sym.kind == PCK) 1124 sym.complete(); 1125 if (sym.exists()) { 1126 if (sym.kind == PCK) 1127 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1128 else 1129 classSymbols = classSymbols.prepend((ClassSymbol)sym); 1130 continue; 1131 } 1132 Assert.check(sym.kind == PCK); 1133 log.warning("proc.package.does.not.exist", nameStr); 1134 pckSymbols = pckSymbols.prepend((PackageSymbol)sym); 1135 } catch (CompletionFailure e) { 1136 log.error("proc.cant.find.class", nameStr); 1137 errors = true; 1138 continue; 1139 } 1140 } 1141 if (errors) { 1142 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1143 log.popDiagnosticHandler(deferredDiagnosticHandler); 1144 return ; 1145 } 1146 } 1147 } 1148 try { 1149 annotationProcessingOccurred = 1150 procEnvImpl.doProcessing(roots, 1151 classSymbols, 1152 pckSymbols, 1153 deferredDiagnosticHandler); 1154 // doProcessing will have handled deferred diagnostics 1155 } finally { 1156 procEnvImpl.close(); 1157 } 1158 } catch (CompletionFailure ex) { 1159 log.error("cant.access", ex.sym, ex.getDetailValue()); 1160 if (deferredDiagnosticHandler != null) { 1161 deferredDiagnosticHandler.reportDeferredDiagnostics(); 1162 log.popDiagnosticHandler(deferredDiagnosticHandler); 1163 } 1164 } 1165 } 1166 1167 private boolean unrecoverableError() { 1168 if (deferredDiagnosticHandler != null) { 1169 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) { 1170 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE)) 1171 return true; 1172 } 1173 } 1174 return false; 1175 } 1176 1177 boolean explicitAnnotationProcessingRequested() { 1178 return 1179 explicitAnnotationProcessingRequested || 1180 explicitAnnotationProcessingRequested(options); 1181 } 1182 1183 static boolean explicitAnnotationProcessingRequested(Options options) { 1184 return 1185 options.isSet(PROCESSOR) || 1186 options.isSet(PROCESSORPATH) || 1187 options.isSet(PROC, "only") || 1188 options.isSet(XPRINT); 1189 } 1190 1191 public void setDeferredDiagnosticHandler(Log.DeferredDiagnosticHandler deferredDiagnosticHandler) { 1192 this.deferredDiagnosticHandler = deferredDiagnosticHandler; 1193 } 1194 1195 /** 1196 * Attribute a list of parse trees, such as found on the "todo" list. 1197 * Note that attributing classes may cause additional files to be 1198 * parsed and entered via the SourceCompleter. 1199 * Attribution of the entries in the list does not stop if any errors occur. 1200 * @return a list of environments for attribute classes. 1201 */ 1202 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) { 1203 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1204 while (!envs.isEmpty()) 1205 results.append(attribute(envs.remove())); 1206 return stopIfError(CompileState.ATTR, results); 1207 } 1208 1209 /** 1210 * Attribute a parse tree. 1211 * @return the attributed parse tree 1212 */ 1213 public Env<AttrContext> attribute(Env<AttrContext> env) { 1214 if (compileStates.isDone(env, CompileState.ATTR)) 1215 return env; 1216 1217 if (verboseCompilePolicy) 1218 printNote("[attribute " + env.enclClass.sym + "]"); 1219 if (verbose) 1220 log.printVerbose("checking.attribution", env.enclClass.sym); 1221 1222 if (!taskListener.isEmpty()) { 1223 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1224 taskListener.started(e); 1225 } 1226 1227 JavaFileObject prev = log.useSource( 1228 env.enclClass.sym.sourcefile != null ? 1229 env.enclClass.sym.sourcefile : 1230 env.toplevel.sourcefile); 1231 try { 1232 attr.attrib(env); 1233 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) { 1234 //if in fail-over mode, ensure that AST expression nodes 1235 //are correctly initialized (e.g. they have a type/symbol) 1236 attr.postAttr(env.tree); 1237 } 1238 compileStates.put(env, CompileState.ATTR); 1239 } 1240 finally { 1241 log.useSource(prev); 1242 } 1243 1244 return env; 1245 } 1246 1247 /** 1248 * Perform dataflow checks on attributed parse trees. 1249 * These include checks for definite assignment and unreachable statements. 1250 * If any errors occur, an empty list will be returned. 1251 * @return the list of attributed parse trees 1252 */ 1253 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) { 1254 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1255 for (Env<AttrContext> env: envs) { 1256 flow(env, results); 1257 } 1258 return stopIfError(CompileState.FLOW, results); 1259 } 1260 1261 /** 1262 * Perform dataflow checks on an attributed parse tree. 1263 */ 1264 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) { 1265 ListBuffer<Env<AttrContext>> results = new ListBuffer<>(); 1266 flow(env, results); 1267 return stopIfError(CompileState.FLOW, results); 1268 } 1269 1270 /** 1271 * Perform dataflow checks on an attributed parse tree. 1272 */ 1273 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) { 1274 if (compileStates.isDone(env, CompileState.FLOW)) { 1275 results.add(env); 1276 return; 1277 } 1278 1279 try { 1280 if (shouldStop(CompileState.FLOW)) 1281 return; 1282 1283 if (relax) { 1284 results.add(env); 1285 return; 1286 } 1287 1288 if (verboseCompilePolicy) 1289 printNote("[flow " + env.enclClass.sym + "]"); 1290 JavaFileObject prev = log.useSource( 1291 env.enclClass.sym.sourcefile != null ? 1292 env.enclClass.sym.sourcefile : 1293 env.toplevel.sourcefile); 1294 try { 1295 make.at(Position.FIRSTPOS); 1296 TreeMaker localMake = make.forToplevel(env.toplevel); 1297 flow.analyzeTree(env, localMake); 1298 compileStates.put(env, CompileState.FLOW); 1299 1300 if (shouldStop(CompileState.FLOW)) 1301 return; 1302 1303 results.add(env); 1304 } 1305 finally { 1306 log.useSource(prev); 1307 } 1308 } 1309 finally { 1310 if (!taskListener.isEmpty()) { 1311 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym); 1312 taskListener.finished(e); 1313 } 1314 } 1315 } 1316 1317 /** 1318 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1319 * for source or code generation. 1320 * If any errors occur, an empty list will be returned. 1321 * @return a list containing the classes to be generated 1322 */ 1323 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) { 1324 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = new ListBuffer<>(); 1325 for (Env<AttrContext> env: envs) 1326 desugar(env, results); 1327 return stopIfError(CompileState.FLOW, results); 1328 } 1329 1330 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs = new HashMap<>(); 1331 1332 /** 1333 * Prepare attributed parse trees, in conjunction with their attribution contexts, 1334 * for source or code generation. If the file was not listed on the command line, 1335 * the current implicitSourcePolicy is taken into account. 1336 * The preparation stops as soon as an error is found. 1337 */ 1338 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) { 1339 if (shouldStop(CompileState.TRANSTYPES)) 1340 return; 1341 1342 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE 1343 && !inputFiles.contains(env.toplevel.sourcefile)) { 1344 return; 1345 } 1346 1347 if (compileStates.isDone(env, CompileState.LOWER)) { 1348 results.addAll(desugaredEnvs.get(env)); 1349 return; 1350 } 1351 1352 /** 1353 * Ensure that superclasses of C are desugared before C itself. This is 1354 * required for two reasons: (i) as erasure (TransTypes) destroys 1355 * information needed in flow analysis and (ii) as some checks carried 1356 * out during lowering require that all synthetic fields/methods have 1357 * already been added to C and its superclasses. 1358 */ 1359 class ScanNested extends TreeScanner { 1360 Set<Env<AttrContext>> dependencies = new LinkedHashSet<>(); 1361 protected boolean hasLambdas; 1362 @Override 1363 public void visitClassDef(JCClassDecl node) { 1364 Type st = types.supertype(node.sym.type); 1365 boolean envForSuperTypeFound = false; 1366 while (!envForSuperTypeFound && st.hasTag(CLASS)) { 1367 ClassSymbol c = st.tsym.outermostClass(); 1368 Env<AttrContext> stEnv = enter.getEnv(c); 1369 if (stEnv != null && env != stEnv) { 1370 if (dependencies.add(stEnv)) { 1371 boolean prevHasLambdas = hasLambdas; 1372 try { 1373 scan(stEnv.tree); 1374 } finally { 1375 /* 1376 * ignore any updates to hasLambdas made during 1377 * the nested scan, this ensures an initalized 1378 * LambdaToMethod is available only to those 1379 * classes that contain lambdas 1380 */ 1381 hasLambdas = prevHasLambdas; 1382 } 1383 } 1384 envForSuperTypeFound = true; 1385 } 1386 st = types.supertype(st); 1387 } 1388 super.visitClassDef(node); 1389 } 1390 @Override 1391 public void visitLambda(JCLambda tree) { 1392 hasLambdas = true; 1393 super.visitLambda(tree); 1394 } 1395 @Override 1396 public void visitReference(JCMemberReference tree) { 1397 hasLambdas = true; 1398 super.visitReference(tree); 1399 } 1400 } 1401 ScanNested scanner = new ScanNested(); 1402 scanner.scan(env.tree); 1403 for (Env<AttrContext> dep: scanner.dependencies) { 1404 if (!compileStates.isDone(dep, CompileState.FLOW)) 1405 desugaredEnvs.put(dep, desugar(flow(attribute(dep)))); 1406 } 1407 1408 //We need to check for error another time as more classes might 1409 //have been attributed and analyzed at this stage 1410 if (shouldStop(CompileState.TRANSTYPES)) 1411 return; 1412 1413 if (verboseCompilePolicy) 1414 printNote("[desugar " + env.enclClass.sym + "]"); 1415 1416 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1417 env.enclClass.sym.sourcefile : 1418 env.toplevel.sourcefile); 1419 try { 1420 //save tree prior to rewriting 1421 JCTree untranslated = env.tree; 1422 1423 make.at(Position.FIRSTPOS); 1424 TreeMaker localMake = make.forToplevel(env.toplevel); 1425 1426 if (env.tree.hasTag(JCTree.Tag.PACKAGEDEF)) { 1427 if (!(stubOutput || sourceOutput || printFlat)) { 1428 if (shouldStop(CompileState.LOWER)) 1429 return; 1430 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake); 1431 if (pdef.head != null) { 1432 Assert.check(pdef.tail.isEmpty()); 1433 results.add(new Pair<>(env, (JCClassDecl)pdef.head)); 1434 } 1435 } 1436 return; 1437 } 1438 1439 if (stubOutput) { 1440 //emit stub Java source file, only for compilation 1441 //units enumerated explicitly on the command line 1442 JCClassDecl cdef = (JCClassDecl)env.tree; 1443 if (untranslated instanceof JCClassDecl && 1444 rootClasses.contains((JCClassDecl)untranslated) && 1445 ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1446 cdef.sym.packge().getQualifiedName() == names.java_lang)) { 1447 results.add(new Pair<>(env, removeMethodBodies(cdef))); 1448 } 1449 return; 1450 } 1451 1452 if (shouldStop(CompileState.TRANSTYPES)) 1453 return; 1454 1455 env.tree = transTypes.translateTopLevelClass(env.tree, localMake); 1456 compileStates.put(env, CompileState.TRANSTYPES); 1457 1458 if (source.allowLambda() && scanner.hasLambdas) { 1459 if (shouldStop(CompileState.UNLAMBDA)) 1460 return; 1461 1462 env.tree = LambdaToMethod.instance(context).translateTopLevelClass(env, env.tree, localMake); 1463 compileStates.put(env, CompileState.UNLAMBDA); 1464 } 1465 1466 if (shouldStop(CompileState.LOWER)) 1467 return; 1468 1469 if (sourceOutput) { 1470 //emit standard Java source file, only for compilation 1471 //units enumerated explicitly on the command line 1472 JCClassDecl cdef = (JCClassDecl)env.tree; 1473 if (untranslated instanceof JCClassDecl && 1474 rootClasses.contains((JCClassDecl)untranslated)) { 1475 results.add(new Pair<>(env, cdef)); 1476 } 1477 return; 1478 } 1479 1480 //translate out inner classes 1481 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake); 1482 compileStates.put(env, CompileState.LOWER); 1483 1484 if (shouldStop(CompileState.LOWER)) 1485 return; 1486 1487 //generate code for each class 1488 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) { 1489 JCClassDecl cdef = (JCClassDecl)l.head; 1490 results.add(new Pair<>(env, cdef)); 1491 } 1492 } 1493 finally { 1494 log.useSource(prev); 1495 } 1496 1497 } 1498 1499 /** Generates the source or class file for a list of classes. 1500 * The decision to generate a source file or a class file is 1501 * based upon the compiler's options. 1502 * Generation stops if an error occurs while writing files. 1503 */ 1504 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) { 1505 generate(queue, null); 1506 } 1507 1508 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) { 1509 if (shouldStop(CompileState.GENERATE)) 1510 return; 1511 1512 boolean usePrintSource = (stubOutput || sourceOutput || printFlat); 1513 1514 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) { 1515 Env<AttrContext> env = x.fst; 1516 JCClassDecl cdef = x.snd; 1517 1518 if (verboseCompilePolicy) { 1519 printNote("[generate " 1520 + (usePrintSource ? " source" : "code") 1521 + " " + cdef.sym + "]"); 1522 } 1523 1524 if (!taskListener.isEmpty()) { 1525 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1526 taskListener.started(e); 1527 } 1528 1529 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ? 1530 env.enclClass.sym.sourcefile : 1531 env.toplevel.sourcefile); 1532 try { 1533 JavaFileObject file; 1534 if (usePrintSource) 1535 file = printSource(env, cdef); 1536 else { 1537 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT) 1538 && jniWriter.needsHeader(cdef.sym)) { 1539 jniWriter.write(cdef.sym); 1540 } 1541 file = genCode(env, cdef); 1542 } 1543 if (results != null && file != null) 1544 results.add(file); 1545 } catch (IOException ex) { 1546 log.error(cdef.pos(), "class.cant.write", 1547 cdef.sym, ex.getMessage()); 1548 return; 1549 } finally { 1550 log.useSource(prev); 1551 } 1552 1553 if (!taskListener.isEmpty()) { 1554 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym); 1555 taskListener.finished(e); 1556 } 1557 } 1558 } 1559 1560 // where 1561 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) { 1562 // use a LinkedHashMap to preserve the order of the original list as much as possible 1563 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<>(); 1564 for (Env<AttrContext> env: envs) { 1565 Queue<Env<AttrContext>> sublist = map.get(env.toplevel); 1566 if (sublist == null) { 1567 sublist = new ListBuffer<>(); 1568 map.put(env.toplevel, sublist); 1569 } 1570 sublist.add(env); 1571 } 1572 return map; 1573 } 1574 1575 JCClassDecl removeMethodBodies(JCClassDecl cdef) { 1576 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0; 1577 class MethodBodyRemover extends TreeTranslator { 1578 @Override 1579 public void visitMethodDef(JCMethodDecl tree) { 1580 tree.mods.flags &= ~Flags.SYNCHRONIZED; 1581 for (JCVariableDecl vd : tree.params) 1582 vd.mods.flags &= ~Flags.FINAL; 1583 tree.body = null; 1584 super.visitMethodDef(tree); 1585 } 1586 @Override 1587 public void visitVarDef(JCVariableDecl tree) { 1588 if (tree.init != null && tree.init.type.constValue() == null) 1589 tree.init = null; 1590 super.visitVarDef(tree); 1591 } 1592 @Override 1593 public void visitClassDef(JCClassDecl tree) { 1594 ListBuffer<JCTree> newdefs = new ListBuffer<>(); 1595 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) { 1596 JCTree t = it.head; 1597 switch (t.getTag()) { 1598 case CLASSDEF: 1599 if (isInterface || 1600 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1601 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1602 newdefs.append(t); 1603 break; 1604 case METHODDEF: 1605 if (isInterface || 1606 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1607 ((JCMethodDecl) t).sym.name == names.init || 1608 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1609 newdefs.append(t); 1610 break; 1611 case VARDEF: 1612 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 || 1613 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang) 1614 newdefs.append(t); 1615 break; 1616 default: 1617 break; 1618 } 1619 } 1620 tree.defs = newdefs.toList(); 1621 super.visitClassDef(tree); 1622 } 1623 } 1624 MethodBodyRemover r = new MethodBodyRemover(); 1625 return r.translate(cdef); 1626 } 1627 1628 public void reportDeferredDiagnostics() { 1629 if (errorCount() == 0 1630 && annotationProcessingOccurred 1631 && implicitSourceFilesRead 1632 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) { 1633 if (explicitAnnotationProcessingRequested()) 1634 log.warning("proc.use.implicit"); 1635 else 1636 log.warning("proc.use.proc.or.implicit"); 1637 } 1638 chk.reportDeferredDiagnostics(); 1639 if (log.compressedOutput) { 1640 log.mandatoryNote(null, "compressed.diags"); 1641 } 1642 } 1643 1644 /** Close the compiler, flushing the logs 1645 */ 1646 public void close() { 1647 rootClasses = null; 1648 finder = null; 1649 reader = null; 1650 make = null; 1651 writer = null; 1652 enter = null; 1653 if (todo != null) 1654 todo.clear(); 1655 todo = null; 1656 parserFactory = null; 1657 syms = null; 1658 source = null; 1659 attr = null; 1660 chk = null; 1661 gen = null; 1662 flow = null; 1663 transTypes = null; 1664 lower = null; 1665 annotate = null; 1666 types = null; 1667 1668 log.flush(); 1669 try { 1670 fileManager.flush(); 1671 } catch (IOException e) { 1672 throw new Abort(e); 1673 } finally { 1674 if (names != null) 1675 names.dispose(); 1676 names = null; 1677 1678 for (Closeable c: closeables) { 1679 try { 1680 c.close(); 1681 } catch (IOException e) { 1682 // When javac uses JDK 7 as a baseline, this code would be 1683 // better written to set any/all exceptions from all the 1684 // Closeables as suppressed exceptions on the FatalError 1685 // that is thrown. 1686 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close"); 1687 throw new FatalError(msg, e); 1688 } 1689 } 1690 closeables = List.nil(); 1691 } 1692 } 1693 1694 protected void printNote(String lines) { 1695 log.printRawLines(Log.WriterKind.NOTICE, lines); 1696 } 1697 1698 /** Print numbers of errors and warnings. 1699 */ 1700 public void printCount(String kind, int count) { 1701 if (count != 0) { 1702 String key; 1703 if (count == 1) 1704 key = "count." + kind; 1705 else 1706 key = "count." + kind + ".plural"; 1707 log.printLines(WriterKind.ERROR, key, String.valueOf(count)); 1708 log.flush(Log.WriterKind.ERROR); 1709 } 1710 } 1711 1712 private static long now() { 1713 return System.currentTimeMillis(); 1714 } 1715 1716 private static long elapsed(long then) { 1717 return now() - then; 1718 } 1719 1720 public void newRound() { 1721 inputFiles.clear(); 1722 todo.clear(); 1723 } 1724} 1725