Tue, 05 Mar 2013 14:12:07 +0000
8009227: Certain diagnostics should not be deferred
Summary: Add new diagnostic flag to mark non deferrable diagnostics
Reviewed-by: jjg
1 /*
2 * Copyright (c) 1999, 2013, 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 */
26 package com.sun.tools.javac.util;
28 import java.io.*;
29 import java.util.Arrays;
30 import java.util.EnumSet;
31 import java.util.HashSet;
32 import java.util.Queue;
33 import java.util.Set;
34 import javax.tools.DiagnosticListener;
35 import javax.tools.JavaFileObject;
37 import com.sun.tools.javac.api.DiagnosticFormatter;
38 import com.sun.tools.javac.main.Main;
39 import com.sun.tools.javac.main.Option;
40 import com.sun.tools.javac.tree.EndPosTable;
41 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
42 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType;
44 import static com.sun.tools.javac.main.Option.*;
46 /** A class for error logs. Reports errors and warnings, and
47 * keeps track of error numbers and positions.
48 *
49 * <p><b>This is NOT part of any supported API.
50 * If you write code that depends on this, you do so at your own risk.
51 * This code and its internal interfaces are subject to change or
52 * deletion without notice.</b>
53 */
54 public class Log extends AbstractLog {
55 /** The context key for the log. */
56 public static final Context.Key<Log> logKey
57 = new Context.Key<Log>();
59 /** The context key for the output PrintWriter. */
60 public static final Context.Key<PrintWriter> outKey =
61 new Context.Key<PrintWriter>();
63 /* TODO: Should unify this with prefix handling in JCDiagnostic.Factory. */
64 public enum PrefixKind {
65 JAVAC("javac."),
66 COMPILER_MISC("compiler.misc.");
67 PrefixKind(String v) {
68 value = v;
69 }
70 public String key(String k) {
71 return value + k;
72 }
73 final String value;
74 }
76 /**
77 * DiagnosticHandler's provide the initial handling for diagnostics.
78 * When a diagnostic handler is created and has been initialized, it
79 * should install itself as the current diagnostic handler. When a
80 * client has finished using a handler, the client should call
81 * {@code log.removeDiagnosticHandler();}
82 *
83 * Note that javax.tools.DiagnosticListener (if set) is called later in the
84 * diagnostic pipeline.
85 */
86 public static abstract class DiagnosticHandler {
87 /**
88 * The previously installed diagnostic handler.
89 */
90 protected DiagnosticHandler prev;
92 /**
93 * Install this diagnostic handler as the current one,
94 * recording the previous one.
95 */
96 protected void install(Log log) {
97 prev = log.diagnosticHandler;
98 log.diagnosticHandler = this;
99 }
101 /**
102 * Handle a diagnostic.
103 */
104 public abstract void report(JCDiagnostic diag);
105 }
107 /**
108 * A DiagnosticHandler that discards all diagnostics.
109 */
110 public static class DiscardDiagnosticHandler extends DiagnosticHandler {
111 public DiscardDiagnosticHandler(Log log) {
112 install(log);
113 }
115 public void report(JCDiagnostic diag) { }
116 }
118 /**
119 * A DiagnosticHandler that can defer some or all diagnostics,
120 * by buffering them for later examination and/or reporting.
121 * If a diagnostic is not deferred, or is subsequently reported
122 * with reportAllDiagnostics(), it will be reported to the previously
123 * active diagnostic handler.
124 */
125 public static class DeferredDiagnosticHandler extends DiagnosticHandler {
126 private Queue<JCDiagnostic> deferred = ListBuffer.lb();
127 private final Filter<JCDiagnostic> filter;
129 public DeferredDiagnosticHandler(Log log) {
130 this(log, null);
131 }
133 public DeferredDiagnosticHandler(Log log, Filter<JCDiagnostic> filter) {
134 this.filter = filter;
135 install(log);
136 }
138 public void report(JCDiagnostic diag) {
139 if (!diag.isFlagSet(JCDiagnostic.DiagnosticFlag.NON_DEFERRABLE) &&
140 (filter == null || filter.accepts(diag))) {
141 deferred.add(diag);
142 } else {
143 prev.report(diag);
144 }
145 }
147 public Queue<JCDiagnostic> getDiagnostics() {
148 return deferred;
149 }
151 /** Report all deferred diagnostics. */
152 public void reportDeferredDiagnostics() {
153 reportDeferredDiagnostics(EnumSet.allOf(JCDiagnostic.Kind.class));
154 }
156 /** Report selected deferred diagnostics. */
157 public void reportDeferredDiagnostics(Set<JCDiagnostic.Kind> kinds) {
158 JCDiagnostic d;
159 while ((d = deferred.poll()) != null) {
160 if (kinds.contains(d.getKind()))
161 prev.report(d);
162 }
163 deferred = null; // prevent accidental ongoing use
164 }
165 }
167 public enum WriterKind { NOTICE, WARNING, ERROR };
169 protected PrintWriter errWriter;
171 protected PrintWriter warnWriter;
173 protected PrintWriter noticeWriter;
175 /** The maximum number of errors/warnings that are reported.
176 */
177 protected int MaxErrors;
178 protected int MaxWarnings;
180 /** Switch: prompt user on each error.
181 */
182 public boolean promptOnError;
184 /** Switch: emit warning messages.
185 */
186 public boolean emitWarnings;
188 /** Switch: suppress note messages.
189 */
190 public boolean suppressNotes;
192 /** Print stack trace on errors?
193 */
194 public boolean dumpOnError;
196 /** Print multiple errors for same source locations.
197 */
198 public boolean multipleErrors;
200 /**
201 * Diagnostic listener, if provided through programmatic
202 * interface to javac (JSR 199).
203 */
204 protected DiagnosticListener<? super JavaFileObject> diagListener;
206 /**
207 * Formatter for diagnostics.
208 */
209 private DiagnosticFormatter<JCDiagnostic> diagFormatter;
211 /**
212 * Keys for expected diagnostics.
213 */
214 public Set<String> expectDiagKeys;
216 /**
217 * JavacMessages object used for localization.
218 */
219 private JavacMessages messages;
221 /**
222 * Handler for initial dispatch of diagnostics.
223 */
224 private DiagnosticHandler diagnosticHandler;
226 /** Construct a log with given I/O redirections.
227 */
228 protected Log(Context context, PrintWriter errWriter, PrintWriter warnWriter, PrintWriter noticeWriter) {
229 super(JCDiagnostic.Factory.instance(context));
230 context.put(logKey, this);
231 this.errWriter = errWriter;
232 this.warnWriter = warnWriter;
233 this.noticeWriter = noticeWriter;
235 @SuppressWarnings("unchecked") // FIXME
236 DiagnosticListener<? super JavaFileObject> dl =
237 context.get(DiagnosticListener.class);
238 this.diagListener = dl;
240 diagnosticHandler = new DefaultDiagnosticHandler();
242 messages = JavacMessages.instance(context);
243 messages.add(Main.javacBundleName);
245 final Options options = Options.instance(context);
246 initOptions(options);
247 options.addListener(new Runnable() {
248 public void run() {
249 initOptions(options);
250 }
251 });
252 }
253 // where
254 private void initOptions(Options options) {
255 this.dumpOnError = options.isSet(DOE);
256 this.promptOnError = options.isSet(PROMPT);
257 this.emitWarnings = options.isUnset(XLINT_CUSTOM, "none");
258 this.suppressNotes = options.isSet("suppressNotes");
259 this.MaxErrors = getIntOption(options, XMAXERRS, getDefaultMaxErrors());
260 this.MaxWarnings = getIntOption(options, XMAXWARNS, getDefaultMaxWarnings());
262 boolean rawDiagnostics = options.isSet("rawDiagnostics");
263 this.diagFormatter = rawDiagnostics ? new RawDiagnosticFormatter(options) :
264 new BasicDiagnosticFormatter(options, messages);
266 String ek = options.get("expectKeys");
267 if (ek != null)
268 expectDiagKeys = new HashSet<String>(Arrays.asList(ek.split(", *")));
269 }
271 private int getIntOption(Options options, Option option, int defaultValue) {
272 String s = options.get(option);
273 try {
274 if (s != null) {
275 int n = Integer.parseInt(s);
276 return (n <= 0 ? Integer.MAX_VALUE : n);
277 }
278 } catch (NumberFormatException e) {
279 // silently ignore ill-formed numbers
280 }
281 return defaultValue;
282 }
284 /** Default value for -Xmaxerrs.
285 */
286 protected int getDefaultMaxErrors() {
287 return 100;
288 }
290 /** Default value for -Xmaxwarns.
291 */
292 protected int getDefaultMaxWarnings() {
293 return 100;
294 }
296 /** The default writer for diagnostics
297 */
298 static PrintWriter defaultWriter(Context context) {
299 PrintWriter result = context.get(outKey);
300 if (result == null)
301 context.put(outKey, result = new PrintWriter(System.err));
302 return result;
303 }
305 /** Construct a log with default settings.
306 */
307 protected Log(Context context) {
308 this(context, defaultWriter(context));
309 }
311 /** Construct a log with all output redirected.
312 */
313 protected Log(Context context, PrintWriter defaultWriter) {
314 this(context, defaultWriter, defaultWriter, defaultWriter);
315 }
317 /** Get the Log instance for this context. */
318 public static Log instance(Context context) {
319 Log instance = context.get(logKey);
320 if (instance == null)
321 instance = new Log(context);
322 return instance;
323 }
325 /** The number of errors encountered so far.
326 */
327 public int nerrors = 0;
329 /** The number of warnings encountered so far.
330 */
331 public int nwarnings = 0;
333 /** A set of all errors generated so far. This is used to avoid printing an
334 * error message more than once. For each error, a pair consisting of the
335 * source file name and source code position of the error is added to the set.
336 */
337 private Set<Pair<JavaFileObject, Integer>> recorded = new HashSet<Pair<JavaFileObject,Integer>>();
339 public boolean hasDiagnosticListener() {
340 return diagListener != null;
341 }
343 public void setEndPosTable(JavaFileObject name, EndPosTable endPosTable) {
344 name.getClass(); // null check
345 getSource(name).setEndPosTable(endPosTable);
346 }
348 /** Return current sourcefile.
349 */
350 public JavaFileObject currentSourceFile() {
351 return source == null ? null : source.getFile();
352 }
354 /** Get the current diagnostic formatter.
355 */
356 public DiagnosticFormatter<JCDiagnostic> getDiagnosticFormatter() {
357 return diagFormatter;
358 }
360 /** Set the current diagnostic formatter.
361 */
362 public void setDiagnosticFormatter(DiagnosticFormatter<JCDiagnostic> diagFormatter) {
363 this.diagFormatter = diagFormatter;
364 }
366 public PrintWriter getWriter(WriterKind kind) {
367 switch (kind) {
368 case NOTICE: return noticeWriter;
369 case WARNING: return warnWriter;
370 case ERROR: return errWriter;
371 default: throw new IllegalArgumentException();
372 }
373 }
375 public void setWriter(WriterKind kind, PrintWriter pw) {
376 pw.getClass();
377 switch (kind) {
378 case NOTICE: noticeWriter = pw; break;
379 case WARNING: warnWriter = pw; break;
380 case ERROR: errWriter = pw; break;
381 default: throw new IllegalArgumentException();
382 }
383 }
385 public void setWriters(PrintWriter pw) {
386 pw.getClass();
387 noticeWriter = warnWriter = errWriter = pw;
388 }
390 /**
391 * Propagate the previous log's information.
392 */
393 public void initRound(Log other) {
394 this.noticeWriter = other.noticeWriter;
395 this.warnWriter = other.warnWriter;
396 this.errWriter = other.errWriter;
397 this.sourceMap = other.sourceMap;
398 this.recorded = other.recorded;
399 this.nerrors = other.nerrors;
400 this.nwarnings = other.nwarnings;
401 }
403 /**
404 * Replace the specified diagnostic handler with the
405 * handler that was current at the time this handler was created.
406 * The given handler must be the currently installed handler;
407 * it must be specified explicitly for clarity and consistency checking.
408 */
409 public void popDiagnosticHandler(DiagnosticHandler h) {
410 Assert.check(diagnosticHandler == h);
411 diagnosticHandler = h.prev;
412 }
414 /** Flush the logs
415 */
416 public void flush() {
417 errWriter.flush();
418 warnWriter.flush();
419 noticeWriter.flush();
420 }
422 public void flush(WriterKind kind) {
423 getWriter(kind).flush();
424 }
426 /** Returns true if an error needs to be reported for a given
427 * source name and pos.
428 */
429 protected boolean shouldReport(JavaFileObject file, int pos) {
430 if (multipleErrors || file == null)
431 return true;
433 Pair<JavaFileObject,Integer> coords = new Pair<JavaFileObject,Integer>(file, pos);
434 boolean shouldReport = !recorded.contains(coords);
435 if (shouldReport)
436 recorded.add(coords);
437 return shouldReport;
438 }
440 /** Prompt user after an error.
441 */
442 public void prompt() {
443 if (promptOnError) {
444 System.err.println(localize("resume.abort"));
445 try {
446 while (true) {
447 switch (System.in.read()) {
448 case 'a': case 'A':
449 System.exit(-1);
450 return;
451 case 'r': case 'R':
452 return;
453 case 'x': case 'X':
454 throw new AssertionError("user abort");
455 default:
456 }
457 }
458 } catch (IOException e) {}
459 }
460 }
462 /** Print the faulty source code line and point to the error.
463 * @param pos Buffer index of the error position, must be on current line
464 */
465 private void printErrLine(int pos, PrintWriter writer) {
466 String line = (source == null ? null : source.getLine(pos));
467 if (line == null)
468 return;
469 int col = source.getColumnNumber(pos, false);
471 printRawLines(writer, line);
472 for (int i = 0; i < col - 1; i++) {
473 writer.print((line.charAt(i) == '\t') ? "\t" : " ");
474 }
475 writer.println("^");
476 writer.flush();
477 }
479 public void printNewline() {
480 noticeWriter.println();
481 }
483 public void printNewline(WriterKind wk) {
484 getWriter(wk).println();
485 }
487 public void printLines(String key, Object... args) {
488 printRawLines(noticeWriter, localize(key, args));
489 }
491 public void printLines(PrefixKind pk, String key, Object... args) {
492 printRawLines(noticeWriter, localize(pk, key, args));
493 }
495 public void printLines(WriterKind wk, String key, Object... args) {
496 printRawLines(getWriter(wk), localize(key, args));
497 }
499 public void printLines(WriterKind wk, PrefixKind pk, String key, Object... args) {
500 printRawLines(getWriter(wk), localize(pk, key, args));
501 }
503 /** Print the text of a message, translating newlines appropriately
504 * for the platform.
505 */
506 public void printRawLines(String msg) {
507 printRawLines(noticeWriter, msg);
508 }
510 /** Print the text of a message, translating newlines appropriately
511 * for the platform.
512 */
513 public void printRawLines(WriterKind kind, String msg) {
514 printRawLines(getWriter(kind), msg);
515 }
517 /** Print the text of a message, translating newlines appropriately
518 * for the platform.
519 */
520 public static void printRawLines(PrintWriter writer, String msg) {
521 int nl;
522 while ((nl = msg.indexOf('\n')) != -1) {
523 writer.println(msg.substring(0, nl));
524 msg = msg.substring(nl+1);
525 }
526 if (msg.length() != 0) writer.println(msg);
527 }
529 /**
530 * Print the localized text of a "verbose" message to the
531 * noticeWriter stream.
532 */
533 public void printVerbose(String key, Object... args) {
534 printRawLines(noticeWriter, localize("verbose." + key, args));
535 }
537 protected void directError(String key, Object... args) {
538 printRawLines(errWriter, localize(key, args));
539 errWriter.flush();
540 }
542 /** Report a warning that cannot be suppressed.
543 * @param pos The source position at which to report the warning.
544 * @param key The key for the localized warning message.
545 * @param args Fields of the warning message.
546 */
547 public void strictWarning(DiagnosticPosition pos, String key, Object ... args) {
548 writeDiagnostic(diags.warning(source, pos, key, args));
549 nwarnings++;
550 }
552 /**
553 * Primary method to report a diagnostic.
554 * @param diagnostic
555 */
556 public void report(JCDiagnostic diagnostic) {
557 diagnosticHandler.report(diagnostic);
558 }
560 /**
561 * Common diagnostic handling.
562 * The diagnostic is counted, and depending on the options and how many diagnostics have been
563 * reported so far, the diagnostic may be handed off to writeDiagnostic.
564 */
565 private class DefaultDiagnosticHandler extends DiagnosticHandler {
566 public void report(JCDiagnostic diagnostic) {
567 if (expectDiagKeys != null)
568 expectDiagKeys.remove(diagnostic.getCode());
570 switch (diagnostic.getType()) {
571 case FRAGMENT:
572 throw new IllegalArgumentException();
574 case NOTE:
575 // Print out notes only when we are permitted to report warnings
576 // Notes are only generated at the end of a compilation, so should be small
577 // in number.
578 if ((emitWarnings || diagnostic.isMandatory()) && !suppressNotes) {
579 writeDiagnostic(diagnostic);
580 }
581 break;
583 case WARNING:
584 if (emitWarnings || diagnostic.isMandatory()) {
585 if (nwarnings < MaxWarnings) {
586 writeDiagnostic(diagnostic);
587 nwarnings++;
588 }
589 }
590 break;
592 case ERROR:
593 if (nerrors < MaxErrors
594 && shouldReport(diagnostic.getSource(), diagnostic.getIntPosition())) {
595 writeDiagnostic(diagnostic);
596 nerrors++;
597 }
598 break;
599 }
600 }
601 }
603 /**
604 * Write out a diagnostic.
605 */
606 protected void writeDiagnostic(JCDiagnostic diag) {
607 if (diagListener != null) {
608 diagListener.report(diag);
609 return;
610 }
612 PrintWriter writer = getWriterForDiagnosticType(diag.getType());
614 printRawLines(writer, diagFormatter.format(diag, messages.getCurrentLocale()));
616 if (promptOnError) {
617 switch (diag.getType()) {
618 case ERROR:
619 case WARNING:
620 prompt();
621 }
622 }
624 if (dumpOnError)
625 new RuntimeException().printStackTrace(writer);
627 writer.flush();
628 }
630 @Deprecated
631 protected PrintWriter getWriterForDiagnosticType(DiagnosticType dt) {
632 switch (dt) {
633 case FRAGMENT:
634 throw new IllegalArgumentException();
636 case NOTE:
637 return noticeWriter;
639 case WARNING:
640 return warnWriter;
642 case ERROR:
643 return errWriter;
645 default:
646 throw new Error();
647 }
648 }
650 /** Find a localized string in the resource bundle.
651 * Because this method is static, it ignores the locale.
652 * Use localize(key, args) when possible.
653 * @param key The key for the localized string.
654 * @param args Fields to substitute into the string.
655 */
656 public static String getLocalizedString(String key, Object ... args) {
657 return JavacMessages.getDefaultLocalizedString(PrefixKind.COMPILER_MISC.key(key), args);
658 }
660 /** Find a localized string in the resource bundle.
661 * @param key The key for the localized string.
662 * @param args Fields to substitute into the string.
663 */
664 public String localize(String key, Object... args) {
665 return localize(PrefixKind.COMPILER_MISC, key, args);
666 }
668 /** Find a localized string in the resource bundle.
669 * @param key The key for the localized string.
670 * @param args Fields to substitute into the string.
671 */
672 public String localize(PrefixKind pk, String key, Object... args) {
673 if (useRawMessages)
674 return pk.key(key);
675 else
676 return messages.getLocalizedString(pk.key(key), args);
677 }
678 // where
679 // backdoor hook for testing, should transition to use -XDrawDiagnostics
680 private static boolean useRawMessages = false;
682 /***************************************************************************
683 * raw error messages without internationalization; used for experimentation
684 * and quick prototyping
685 ***************************************************************************/
687 /** print an error or warning message:
688 */
689 private void printRawError(int pos, String msg) {
690 if (source == null || pos == Position.NOPOS) {
691 printRawLines(errWriter, "error: " + msg);
692 } else {
693 int line = source.getLineNumber(pos);
694 JavaFileObject file = source.getFile();
695 if (file != null)
696 printRawLines(errWriter,
697 file.getName() + ":" +
698 line + ": " + msg);
699 printErrLine(pos, errWriter);
700 }
701 errWriter.flush();
702 }
704 /** report an error:
705 */
706 public void rawError(int pos, String msg) {
707 if (nerrors < MaxErrors && shouldReport(currentSourceFile(), pos)) {
708 printRawError(pos, msg);
709 prompt();
710 nerrors++;
711 }
712 errWriter.flush();
713 }
715 /** report a warning:
716 */
717 public void rawWarning(int pos, String msg) {
718 if (nwarnings < MaxWarnings && emitWarnings) {
719 printRawError(pos, "warning: " + msg);
720 }
721 prompt();
722 nwarnings++;
723 errWriter.flush();
724 }
726 public static String format(String fmt, Object... args) {
727 return String.format((java.util.Locale)null, fmt, args);
728 }
730 }