1 /*
2 * Copyright (c) 1999, 2025, 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
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.nio.file.ClosedFileSystemException;
33 import java.util.Arrays;
34 import java.util.EnumSet;
35 import java.util.HashMap;
36 import java.util.HashSet;
37 import java.util.Map;
38 import java.util.Set;
39 import java.util.function.IntFunction;
40 import java.util.function.Predicate;
41 import java.util.stream.IntStream;
42
43 import javax.lang.model.element.Modifier;
44 import javax.lang.model.element.NestingKind;
45 import javax.tools.JavaFileManager;
46 import javax.tools.JavaFileObject;
47
48 import com.sun.tools.javac.code.Source;
49 import com.sun.tools.javac.code.Source.Feature;
50 import com.sun.tools.javac.comp.Annotate;
51 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
52 import com.sun.tools.javac.code.*;
53 import com.sun.tools.javac.code.Directive.*;
54 import com.sun.tools.javac.code.Lint.LintCategory;
55 import com.sun.tools.javac.code.Scope.WriteableScope;
56 import com.sun.tools.javac.code.Symbol.*;
57 import com.sun.tools.javac.code.Symtab;
58 import com.sun.tools.javac.code.Type.*;
59 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
60 import com.sun.tools.javac.file.BaseFileManager;
61 import com.sun.tools.javac.file.PathFileObject;
62 import com.sun.tools.javac.jvm.ClassFile.Version;
63 import com.sun.tools.javac.jvm.PoolConstant.NameAndType;
64 import com.sun.tools.javac.main.Option;
65 import com.sun.tools.javac.resources.CompilerProperties;
66 import com.sun.tools.javac.resources.CompilerProperties.Errors;
67 import com.sun.tools.javac.resources.CompilerProperties.Fragments;
68 import com.sun.tools.javac.resources.CompilerProperties.LintWarnings;
69 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
70 import com.sun.tools.javac.tree.JCTree;
71 import com.sun.tools.javac.util.*;
72 import com.sun.tools.javac.util.ByteBuffer.UnderflowException;
73 import com.sun.tools.javac.util.DefinedBy.Api;
74 import com.sun.tools.javac.util.JCDiagnostic.Fragment;
75
76 import static com.sun.tools.javac.code.Flags.*;
77 import static com.sun.tools.javac.code.Kinds.Kind.*;
78
79 import com.sun.tools.javac.code.Scope.LookupKind;
80
81 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;
82 import static com.sun.tools.javac.code.TypeTag.ARRAY;
83 import static com.sun.tools.javac.code.TypeTag.CLASS;
84 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
85 import static com.sun.tools.javac.jvm.ClassFile.*;
86 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
87
88 import static com.sun.tools.javac.main.Option.PARAMETERS;
89
90 /** This class provides operations to read a classfile into an internal
91 * representation. The internal representation is anchored in a
92 * ClassSymbol which contains in its scope symbol representations
93 * for all other definitions in the classfile. Top-level Classes themselves
94 * appear as members of the scopes of PackageSymbols.
95 *
96 * <p><b>This is NOT part of any supported API.
97 * If you write code that depends on this, you do so at your own risk.
98 * This code and its internal interfaces are subject to change or
99 * deletion without notice.</b>
100 */
101 public class ClassReader {
102 /** The context key for the class reader. */
103 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
104
105 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
106
107 private final Annotate annotate;
108
109 /** Switch: verbose output.
110 */
111 boolean verbose;
112
113 /** Switch: allow modules.
114 */
115 boolean allowModules;
116
117 /** Switch: allow value classes.
118 */
119 boolean allowValueClasses;
120
121 /** Switch: allow sealed
122 */
123 boolean allowSealedTypes;
124
125 /** Switch: allow records
126 */
127 boolean allowRecords;
128
129 /** Switch: warn (instead of error) on illegal UTF-8
130 */
131 boolean warnOnIllegalUtf8;
132
133 /** Switch: preserve parameter names from the variable table.
134 */
135 public boolean saveParameterNames;
136
137 /**
138 * The currently selected profile.
139 */
140 public final Profile profile;
141
142 /** The log to use for verbose output
143 */
144 final Log log;
145
146 /** The symbol table. */
147 Symtab syms;
148
149 /** The root Lint config. */
150 Lint lint;
151
152 Types types;
153
154 /** The name table. */
155 final Names names;
156
157 /** Access to files
158 */
159 private final JavaFileManager fileManager;
160
161 /** Factory for diagnostics
162 */
163 JCDiagnostic.Factory diagFactory;
164
165 DeferredCompletionFailureHandler dcfh;
166
167 /**
168 * Support for preview language features.
169 */
170 Preview preview;
171
172 /** The current scope where type variables are entered.
173 */
174 protected WriteableScope typevars;
175
176 private List<InterimUsesDirective> interimUses = List.nil();
177 private List<InterimProvidesDirective> interimProvides = List.nil();
178
179 /** The path name of the class file currently being read.
180 */
181 protected JavaFileObject currentClassFile = null;
182
183 /** The class or method currently being read.
184 */
185 protected Symbol currentOwner = null;
186
187 /** The module containing the class currently being read.
188 */
189 protected ModuleSymbol currentModule = null;
190
191 /** The buffer containing the currently read class file.
192 */
193 ByteBuffer buf = new ByteBuffer(INITIAL_BUFFER_SIZE);
194
195 /** The current input pointer.
196 */
197 protected int bp;
198
199 /** The pool reader.
200 */
201 PoolReader poolReader;
202
203 /** The major version number of the class file being read. */
204 int majorVersion;
205 /** The minor version number of the class file being read. */
206 int minorVersion;
207
208 /** true if the class file being read is a preview class file. */
209 boolean previewClassFile;
210
211 /** UTF-8 validation level */
212 Convert.Validation utf8validation;
213
214 /** A table to hold the constant pool indices for method parameter
215 * names, as given in LocalVariableTable attributes.
216 */
217 int[] parameterNameIndicesLvt;
218
219 /**
220 * A table to hold the constant pool indices for method parameter
221 * names, as given in the MethodParameters attribute.
222 */
223 int[] parameterNameIndicesMp;
224
225 /**
226 * A table to hold the access flags of the method parameters.
227 */
228 int[] parameterAccessFlags;
229
230 /**
231 * A table to hold the access flags of the method parameters,
232 * for all parameters including synthetic and mandated ones.
233 */
234 int[] allParameterAccessFlags;
235
236 /**
237 * A table to hold annotations for method parameters.
238 */
239 ParameterAnnotations[] parameterAnnotations;
240
241 /**
242 * A holder for parameter annotations.
243 */
244 static class ParameterAnnotations {
245 List<CompoundAnnotationProxy> proxies;
246
247 void add(List<CompoundAnnotationProxy> newAnnotations) {
248 if (proxies == null) {
249 proxies = newAnnotations;
250 } else {
251 proxies = proxies.prependList(newAnnotations);
252 }
253 }
254 }
255
256 /**
257 * The set of attribute names for which warnings have been generated for the current class
258 */
259 Set<Name> warnedAttrs = new HashSet<>();
260
261 /**
262 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
263 * {@code @Target}
264 */
265 CompoundAnnotationProxy target;
266
267 /**
268 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with
269 * {@code @Repeatable}
270 */
271 CompoundAnnotationProxy repeatable;
272
273 /** Get the ClassReader instance for this invocation. */
274 public static ClassReader instance(Context context) {
275 ClassReader instance = context.get(classReaderKey);
276 if (instance == null)
277 instance = new ClassReader(context);
278 return instance;
279 }
280
281 /** Construct a new class reader. */
282 @SuppressWarnings("this-escape")
283 protected ClassReader(Context context) {
284 context.put(classReaderKey, this);
285 annotate = Annotate.instance(context);
286 names = Names.instance(context);
287 syms = Symtab.instance(context);
288 types = Types.instance(context);
289 fileManager = context.get(JavaFileManager.class);
290 if (fileManager == null)
291 throw new AssertionError("FileManager initialization error");
292 diagFactory = JCDiagnostic.Factory.instance(context);
293 dcfh = DeferredCompletionFailureHandler.instance(context);
294
295 log = Log.instance(context);
296
297 Options options = Options.instance(context);
298 verbose = options.isSet(Option.VERBOSE);
299
300 Source source = Source.instance(context);
301 preview = Preview.instance(context);
302 allowModules = Feature.MODULES.allowedInSource(source);
303 allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) &&
304 Feature.VALUE_CLASSES.allowedInSource(source);
305 allowRecords = Feature.RECORDS.allowedInSource(source);
306 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source);
307 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source);
308
309 saveParameterNames = options.isSet(PARAMETERS);
310
311 profile = Profile.instance(context);
312
313 typevars = WriteableScope.create(syms.noSymbol);
314
315 lint = Lint.instance(context);
316
317 initAttributeReaders();
318 }
319
320 /** Add member to class unless it is synthetic.
321 */
322 private void enterMember(ClassSymbol c, Symbol sym) {
323 // Synthetic members are not entered -- reason lost to history (optimization?).
324 // Lambda methods must be entered because they may have inner classes (which reference them)
325 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
326 c.members_field.enter(sym);
327 }
328
329 /* **********************************************************************
330 * Error Diagnoses
331 ***********************************************************************/
332
333 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
334 return badClassFile(diagFactory.fragment(key, args));
335 }
336
337 public ClassFinder.BadClassFile badClassFile(Fragment fragment) {
338 return badClassFile(diagFactory.fragment(fragment));
339 }
340
341 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) {
342 return new ClassFinder.BadClassFile (
343 currentOwner.enclClass(),
344 currentClassFile,
345 diagnostic,
346 diagFactory,
347 dcfh);
348 }
349
350 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) {
351 return new ClassFinder.BadEnclosingMethodAttr (
352 currentOwner.enclClass(),
353 currentClassFile,
354 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)),
355 diagFactory,
356 dcfh);
357 }
358
359 /* **********************************************************************
360 * Buffer Access
361 ***********************************************************************/
362
363 /** Read a character.
364 */
365 char nextChar() {
366 char res;
367 try {
368 res = buf.getChar(bp);
369 } catch (UnderflowException e) {
370 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
371 }
372 bp += 2;
373 return res;
374 }
375
376 /** Read a byte.
377 */
378 int nextByte() {
379 try {
380 return buf.getByte(bp++) & 0xFF;
381 } catch (UnderflowException e) {
382 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
383 }
384 }
385
386 /** Read an integer.
387 */
388 int nextInt() {
389 int res;
390 try {
391 res = buf.getInt(bp);
392 } catch (UnderflowException e) {
393 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
394 }
395 bp += 4;
396 return res;
397 }
398
399 /* **********************************************************************
400 * Constant Pool Access
401 ***********************************************************************/
402
403 /** Read module_flags.
404 */
405 Set<ModuleFlags> readModuleFlags(int flags) {
406 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
407 for (ModuleFlags f : ModuleFlags.values()) {
408 if ((flags & f.value) != 0)
409 set.add(f);
410 }
411 return set;
412 }
413
414 /** Read resolution_flags.
415 */
416 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
417 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
418 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
419 if ((flags & f.value) != 0)
420 set.add(f);
421 }
422 return set;
423 }
424
425 /** Read exports_flags.
426 */
427 Set<ExportsFlag> readExportsFlags(int flags) {
428 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
429 for (ExportsFlag f: ExportsFlag.values()) {
430 if ((flags & f.value) != 0)
431 set.add(f);
432 }
433 return set;
434 }
435
436 /** Read opens_flags.
437 */
438 Set<OpensFlag> readOpensFlags(int flags) {
439 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
440 for (OpensFlag f: OpensFlag.values()) {
441 if ((flags & f.value) != 0)
442 set.add(f);
443 }
444 return set;
445 }
446
447 /** Read requires_flags.
448 */
449 Set<RequiresFlag> readRequiresFlags(int flags) {
450 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
451 for (RequiresFlag f: RequiresFlag.values()) {
452 if ((flags & f.value) != 0)
453 set.add(f);
454 }
455 return set;
456 }
457
458 /* **********************************************************************
459 * Reading Types
460 ***********************************************************************/
461
462 /** The unread portion of the currently read type is
463 * signature[sigp..siglimit-1].
464 */
465 byte[] signature;
466 int sigp;
467 int siglimit;
468 boolean sigEnterPhase = false;
469
470 /** Convert signature to type, where signature is a byte array segment.
471 */
472 Type sigToType(byte[] sig, int offset, int len) {
473 signature = sig;
474 sigp = offset;
475 siglimit = offset + len;
476 return sigToType();
477 }
478
479 /** Convert signature to type, where signature is implicit.
480 */
481 Type sigToType() {
482 switch ((char) signature[sigp]) {
483 case 'T':
484 sigp++;
485 int start = sigp;
486 while (signature[sigp] != ';') sigp++;
487 sigp++;
488 return sigEnterPhase
489 ? Type.noType
490 : findTypeVar(readName(signature, start, sigp - 1 - start));
491 case '+': {
492 sigp++;
493 Type t = sigToType();
494 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
495 }
496 case '*':
497 sigp++;
498 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
499 syms.boundClass);
500 case '-': {
501 sigp++;
502 Type t = sigToType();
503 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
504 }
505 case 'B':
506 sigp++;
507 return syms.byteType;
508 case 'C':
509 sigp++;
510 return syms.charType;
511 case 'D':
512 sigp++;
513 return syms.doubleType;
514 case 'F':
515 sigp++;
516 return syms.floatType;
517 case 'I':
518 sigp++;
519 return syms.intType;
520 case 'J':
521 sigp++;
522 return syms.longType;
523 case 'L':
524 {
525 // int oldsigp = sigp;
526 Type t = classSigToType();
527 if (sigp < siglimit && signature[sigp] == '.')
528 throw badClassFile("deprecated inner class signature syntax " +
529 "(please recompile from source)");
530 /*
531 System.err.println(" decoded " +
532 new String(signature, oldsigp, sigp-oldsigp) +
533 " => " + t + " outer " + t.outer());
534 */
535 return t;
536 }
537 case 'S':
538 sigp++;
539 return syms.shortType;
540 case 'V':
541 sigp++;
542 return syms.voidType;
543 case 'Z':
544 sigp++;
545 return syms.booleanType;
546 case '[':
547 sigp++;
548 return new ArrayType(sigToType(), syms.arrayClass);
549 case '(':
550 sigp++;
551 List<Type> argtypes = sigToTypes(')');
552 Type restype = sigToType();
553 List<Type> thrown = List.nil();
554 while (sigp < siglimit && signature[sigp] == '^') {
555 sigp++;
556 thrown = thrown.prepend(sigToType());
557 }
558 // if there is a typevar in the throws clause we should state it.
559 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
560 if (l.head.hasTag(TYPEVAR)) {
561 l.head.tsym.flags_field |= THROWS;
562 }
563 }
564 return new MethodType(argtypes,
565 restype,
566 thrown.reverse(),
567 syms.methodClass);
568 case '<':
569 typevars = typevars.dup(currentOwner);
570 Type poly = new ForAll(sigToTypeParams(), sigToType());
571 typevars = typevars.leave();
572 return poly;
573 default:
574 throw badClassFile("bad.signature", quoteBadSignature());
575 }
576 }
577
578 byte[] signatureBuffer = new byte[0];
579 int sbp = 0;
580 /** Convert class signature to type, where signature is implicit.
581 */
582 Type classSigToType() {
583 if (signature[sigp] != 'L')
584 throw badClassFile("bad.class.signature", quoteBadSignature());
585 sigp++;
586 Type outer = Type.noType;
587 int startSbp = sbp;
588
589 while (true) {
590 final byte c = signature[sigp++];
591 switch (c) {
592
593 case ';': { // end
594 ClassSymbol t = enterClass(readName(signatureBuffer,
595 startSbp,
596 sbp - startSbp));
597
598 try {
599 if (outer == Type.noType) {
600 ClassType et = (ClassType) t.erasure(types);
601 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata());
602 }
603 return new ClassType(outer, List.nil(), t, List.nil());
604 } finally {
605 sbp = startSbp;
606 }
607 }
608
609 case '<': // generic arguments
610 ClassSymbol t = enterClass(readName(signatureBuffer,
611 startSbp,
612 sbp - startSbp));
613 List<Type> actuals = sigToTypes('>');
614 List<Type> formals = ((ClassType)t.type.tsym.type).typarams_field;
615 if (formals != null) {
616 if (actuals.isEmpty())
617 actuals = formals;
618 }
619 /* actualsCp is final as it will be captured by the inner class below. We could avoid defining
620 * this additional local variable and depend on field ClassType::typarams_field which `actuals` is
621 * assigned to but then we would have a dependendy on the internal representation of ClassType which
622 * could change in the future
623 */
624 final List<Type> actualsCp = actuals;
625 outer = new ClassType(outer, actuals, t, List.nil()) {
626 boolean completed = false;
627 boolean typeArgsSet = false;
628 @Override @DefinedBy(Api.LANGUAGE_MODEL)
629 public Type getEnclosingType() {
630 if (!completed) {
631 completed = true;
632 tsym.apiComplete();
633 Type enclosingType = tsym.type.getEnclosingType();
634 if (enclosingType != Type.noType) {
635 List<Type> typeArgs =
636 super.getEnclosingType().allparams();
637 List<Type> typeParams =
638 enclosingType.allparams();
639 if (typeParams.length() != typeArgs.length()) {
640 // no "rare" types
641 super.setEnclosingType(types.erasure(enclosingType));
642 } else {
643 super.setEnclosingType(types.subst(enclosingType,
644 typeParams,
645 typeArgs));
646 }
647 } else {
648 super.setEnclosingType(Type.noType);
649 }
650 }
651 return super.getEnclosingType();
652 }
653 @Override
654 public void setEnclosingType(Type outer) {
655 throw new UnsupportedOperationException();
656 }
657
658 @Override
659 public List<Type> getTypeArguments() {
660 if (!typeArgsSet) {
661 typeArgsSet = true;
662 List<Type> formalsCp = ((ClassType)t.type.tsym.type).typarams_field;
663 if (formalsCp != null && !formalsCp.isEmpty()) {
664 if (actualsCp.length() == formalsCp.length()) {
665 List<Type> a = actualsCp;
666 List<Type> f = formalsCp;
667 while (a.nonEmpty()) {
668 a.head = a.head.withTypeVar(f.head);
669 a = a.tail;
670 f = f.tail;
671 }
672 }
673 }
674 }
675 return super.getTypeArguments();
676 }
677 };
678 switch (signature[sigp++]) {
679 case ';':
680 if (sigp < siglimit && signature[sigp] == '.') {
681 // support old-style GJC signatures
682 // The signature produced was
683 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
684 // rather than say
685 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
686 // so we skip past ".Lfoo/Outer$"
687 sigp += (sbp - startSbp) + // "foo/Outer"
688 3; // ".L" and "$"
689 signatureBuffer[sbp++] = (byte)'$';
690 break;
691 } else {
692 sbp = startSbp;
693 return outer;
694 }
695 case '.':
696 signatureBuffer[sbp++] = (byte)'$';
697 break;
698 default:
699 throw new AssertionError(signature[sigp-1]);
700 }
701 continue;
702
703 case '.':
704 //we have seen an enclosing non-generic class
705 if (outer != Type.noType) {
706 t = enterClass(readName(signatureBuffer,
707 startSbp,
708 sbp - startSbp));
709 outer = new ClassType(outer, List.nil(), t, List.nil());
710 }
711 signatureBuffer[sbp++] = (byte)'$';
712 continue;
713 case '/':
714 signatureBuffer[sbp++] = (byte)'.';
715 continue;
716 default:
717 signatureBuffer[sbp++] = c;
718 continue;
719 }
720 }
721 }
722
723 /** Quote a bogus signature for display inside an error message.
724 */
725 String quoteBadSignature() {
726 String sigString;
727 try {
728 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE);
729 } catch (InvalidUtfException e) {
730 throw new AssertionError(e);
731 }
732 if (sigString.length() > 32)
733 sigString = sigString.substring(0, 32) + "...";
734 return "\"" + sigString + "\"";
735 }
736
737 /** Convert (implicit) signature to list of types
738 * until `terminator' is encountered.
739 */
740 List<Type> sigToTypes(char terminator) {
741 List<Type> head = List.of(null);
742 List<Type> tail = head;
743 while (signature[sigp] != terminator)
744 tail = tail.setTail(List.of(sigToType()));
745 sigp++;
746 return head.tail;
747 }
748
749 /** Convert signature to type parameters, where signature is a byte
750 * array segment.
751 */
752 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
753 signature = sig;
754 sigp = offset;
755 siglimit = offset + len;
756 return sigToTypeParams();
757 }
758
759 /** Convert signature to type parameters, where signature is implicit.
760 */
761 List<Type> sigToTypeParams() {
762 List<Type> tvars = List.nil();
763 if (signature[sigp] == '<') {
764 sigp++;
765 int start = sigp;
766 sigEnterPhase = true;
767 while (signature[sigp] != '>')
768 tvars = tvars.prepend(sigToTypeParam());
769 sigEnterPhase = false;
770 sigp = start;
771 while (signature[sigp] != '>')
772 sigToTypeParam();
773 sigp++;
774 }
775 return tvars.reverse();
776 }
777
778 /** Convert (implicit) signature to type parameter.
779 */
780 Type sigToTypeParam() {
781 int start = sigp;
782 while (signature[sigp] != ':') sigp++;
783 Name name = readName(signature, start, sigp - start);
784 TypeVar tvar;
785 if (sigEnterPhase) {
786 tvar = new TypeVar(name, currentOwner, syms.botType);
787 typevars.enter(tvar.tsym);
788 } else {
789 tvar = (TypeVar)findTypeVar(name);
790 }
791 List<Type> bounds = List.nil();
792 boolean allInterfaces = false;
793 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
794 sigp++;
795 allInterfaces = true;
796 }
797 while (signature[sigp] == ':') {
798 sigp++;
799 bounds = bounds.prepend(sigToType());
800 }
801 if (!sigEnterPhase) {
802 types.setBounds(tvar, bounds.reverse(), allInterfaces);
803 }
804 return tvar;
805 }
806
807 /** Find type variable with given name in `typevars' scope.
808 */
809 Type findTypeVar(Name name) {
810 Symbol s = typevars.findFirst(name);
811 if (s != null) {
812 return s.type;
813 } else {
814 if (readingClassAttr) {
815 // While reading the class attribute, the supertypes
816 // might refer to a type variable from an enclosing element
817 // (method or class).
818 // If the type variable is defined in the enclosing class,
819 // we can actually find it in
820 // currentOwner.owner.type.getTypeArguments()
821 // However, until we have read the enclosing method attribute
822 // we don't know for sure if this owner is correct. It could
823 // be a method and there is no way to tell before reading the
824 // enclosing method attribute.
825 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
826 missingTypeVariables = missingTypeVariables.prepend(t);
827 // System.err.println("Missing type var " + name);
828 return t;
829 }
830 throw badClassFile("undecl.type.var", name);
831 }
832 }
833
834 private Name readName(byte[] buf, int off, int len) {
835 try {
836 return names.fromUtf(buf, off, len, utf8validation);
837 } catch (InvalidUtfException e) {
838 if (warnOnIllegalUtf8) {
839 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
840 Fragments.BadUtf8ByteSequenceAt(sigp)));
841 return names.fromUtfLax(buf, off, len);
842 }
843 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp));
844 }
845 }
846
847 /* **********************************************************************
848 * Reading Attributes
849 ***********************************************************************/
850
851 protected enum AttributeKind { CLASS, MEMBER }
852
853 protected abstract class AttributeReader {
854 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
855 this.name = name;
856 this.version = version;
857 this.kinds = kinds;
858 }
859
860 protected boolean accepts(AttributeKind kind) {
861 if (kinds.contains(kind)) {
862 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
863 return true;
864
865 if (!warnedAttrs.contains(name)) {
866 JavaFileObject prev = log.useSource(currentClassFile);
867 try {
868 lint.logIfEnabled(
869 LintWarnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion));
870 } finally {
871 log.useSource(prev);
872 }
873 warnedAttrs.add(name);
874 }
875 }
876 return false;
877 }
878
879 protected abstract void read(Symbol sym, int attrLen);
880
881 protected final Name name;
882 protected final ClassFile.Version version;
883 protected final Set<AttributeKind> kinds;
884 }
885
886 protected Set<AttributeKind> CLASS_ATTRIBUTE =
887 EnumSet.of(AttributeKind.CLASS);
888 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
889 EnumSet.of(AttributeKind.MEMBER);
890 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
891 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
892
893 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
894
895 private void initAttributeReaders() {
896 AttributeReader[] readers = {
897 // v45.3 attributes
898
899 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
900 protected void read(Symbol sym, int attrLen) {
901 if (saveParameterNames)
902 ((MethodSymbol)sym).code = readCode(sym);
903 else
904 bp = bp + attrLen;
905 }
906 },
907
908 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
909 protected void read(Symbol sym, int attrLen) {
910 Object v = poolReader.getConstant(nextChar());
911 // Ignore ConstantValue attribute if field not final.
912 if ((sym.flags() & FINAL) == 0) {
913 return;
914 }
915 VarSymbol var = (VarSymbol) sym;
916 switch (var.type.getTag()) {
917 case BOOLEAN:
918 case BYTE:
919 case CHAR:
920 case SHORT:
921 case INT:
922 checkType(var, Integer.class, v);
923 break;
924 case LONG:
925 checkType(var, Long.class, v);
926 break;
927 case FLOAT:
928 checkType(var, Float.class, v);
929 break;
930 case DOUBLE:
931 checkType(var, Double.class, v);
932 break;
933 case CLASS:
934 if (var.type.tsym == syms.stringType.tsym) {
935 checkType(var, String.class, v);
936 } else {
937 throw badClassFile("bad.constant.value.type", var.type);
938 }
939 break;
940 default:
941 // ignore ConstantValue attribute if type is not primitive or String
942 return;
943 }
944 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) {
945 throw badClassFile("bad.constant.range", v, var, var.type);
946 }
947 var.setData(v);
948 }
949
950 void checkType(Symbol var, Class<?> clazz, Object value) {
951 if (!clazz.isInstance(value)) {
952 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName());
953 }
954 }
955 },
956
957 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
958 protected void read(Symbol sym, int attrLen) {
959 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
960
961 s.flags_field |= DEPRECATED;
962 }
963 },
964
965 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
966 protected void read(Symbol sym, int attrLen) {
967 int nexceptions = nextChar();
968 List<Type> thrown = List.nil();
969 for (int j = 0; j < nexceptions; j++)
970 thrown = thrown.prepend(poolReader.getClass(nextChar()).type);
971 if (sym.type.getThrownTypes().isEmpty())
972 sym.type.asMethodType().thrown = thrown.reverse();
973 }
974 },
975
976 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
977 protected void read(Symbol sym, int attrLen) {
978 ClassSymbol c = (ClassSymbol) sym;
979 if (currentModule.module_info == c) {
980 //prevent entering the classes too soon:
981 skipInnerClasses();
982 } else {
983 readInnerClasses(c);
984 }
985 }
986 },
987
988 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
989 protected void read(Symbol sym, int attrLen) {
990 int newbp = bp + attrLen;
991 if (saveParameterNames) {
992 // Pick up parameter names from the variable table.
993 // Parameter names are not explicitly identified as such,
994 // but all parameter name entries in the LocalVariableTable
995 // have a start_pc of 0. Therefore, we record the name
996 // indices of all slots with a start_pc of zero in the
997 // parameterNameIndices array.
998 // Note that this implicitly honors the JVMS spec that
999 // there may be more than one LocalVariableTable, and that
1000 // there is no specified ordering for the entries.
1001 int numEntries = nextChar();
1002 for (int i = 0; i < numEntries; i++) {
1003 int start_pc = nextChar();
1004 int length = nextChar();
1005 int nameIndex = nextChar();
1006 int sigIndex = nextChar();
1007 int register = nextChar();
1008 if (start_pc == 0) {
1009 // ensure array large enough
1010 if (register >= parameterNameIndicesLvt.length) {
1011 int newSize =
1012 Math.max(register + 1, parameterNameIndicesLvt.length + 8);
1013 parameterNameIndicesLvt =
1014 Arrays.copyOf(parameterNameIndicesLvt, newSize);
1015 }
1016 parameterNameIndicesLvt[register] = nameIndex;
1017 }
1018 }
1019 }
1020 bp = newbp;
1021 }
1022 },
1023
1024 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1025 protected void read(Symbol sym, int attrLen) {
1026 ClassSymbol c = (ClassSymbol) sym;
1027 Name n = poolReader.getName(nextChar());
1028 c.sourcefile = new SourceFileObject(n);
1029 // If the class is a toplevel class, originating from a Java source file,
1030 // but the class name does not match the file name, then it is
1031 // an auxiliary class.
1032 String sn = n.toString();
1033 if (c.owner.kind == PCK &&
1034 sn.endsWith(".java") &&
1035 !sn.equals(c.name.toString()+".java")) {
1036 c.flags_field |= AUXILIARY;
1037 }
1038 }
1039 },
1040
1041 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1042 protected void read(Symbol sym, int attrLen) {
1043 sym.flags_field |= SYNTHETIC;
1044 }
1045 },
1046
1047 // standard v49 attributes
1048
1049 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1050 protected void read(Symbol sym, int attrLen) {
1051 int newbp = bp + attrLen;
1052 readEnclosingMethodAttr(sym);
1053 bp = newbp;
1054 }
1055 },
1056
1057 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1058 protected void read(Symbol sym, int attrLen) {
1059 if (sym.kind == TYP) {
1060 ClassSymbol c = (ClassSymbol) sym;
1061 readingClassAttr = true;
1062 try {
1063 ClassType ct1 = (ClassType)c.type;
1064 Assert.check(c == currentOwner);
1065 ct1.typarams_field = poolReader.getName(nextChar())
1066 .map(ClassReader.this::sigToTypeParams);
1067 ct1.supertype_field = sigToType();
1068 ListBuffer<Type> is = new ListBuffer<>();
1069 while (sigp != siglimit) is.append(sigToType());
1070 ct1.interfaces_field = is.toList();
1071 } finally {
1072 readingClassAttr = false;
1073 }
1074 } else {
1075 List<Type> thrown = sym.type.getThrownTypes();
1076 sym.type = poolReader.getType(nextChar());
1077 //- System.err.println(" # " + sym.type);
1078 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1079 sym.type.asMethodType().thrown = thrown;
1080
1081 }
1082 }
1083 },
1084
1085 // v49 annotation attributes
1086
1087 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1088 protected void read(Symbol sym, int attrLen) {
1089 attachAnnotationDefault(sym);
1090 }
1091 },
1092
1093 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1094 protected void read(Symbol sym, int attrLen) {
1095 attachAnnotations(sym);
1096 }
1097 },
1098
1099 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1100 protected void read(Symbol sym, int attrLen) {
1101 readParameterAnnotations(sym);
1102 }
1103 },
1104
1105 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1106 protected void read(Symbol sym, int attrLen) {
1107 attachAnnotations(sym);
1108 }
1109 },
1110
1111 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1112 protected void read(Symbol sym, int attrLen) {
1113 readParameterAnnotations(sym);
1114 }
1115 },
1116
1117 // additional "legacy" v49 attributes, superseded by flags
1118
1119 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1120 protected void read(Symbol sym, int attrLen) {
1121 sym.flags_field |= ANNOTATION;
1122 }
1123 },
1124
1125 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1126 protected void read(Symbol sym, int attrLen) {
1127 sym.flags_field |= BRIDGE;
1128 }
1129 },
1130
1131 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1132 protected void read(Symbol sym, int attrLen) {
1133 sym.flags_field |= ENUM;
1134 }
1135 },
1136
1137 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1138 protected void read(Symbol sym, int attrLen) {
1139 sym.flags_field |= VARARGS;
1140 }
1141 },
1142
1143 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1144 protected void read(Symbol sym, int attrLen) {
1145 attachTypeAnnotations(sym);
1146 }
1147 },
1148
1149 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1150 protected void read(Symbol sym, int attrLen) {
1151 attachTypeAnnotations(sym);
1152 }
1153 },
1154
1155 // The following attributes for a Code attribute are not currently handled
1156 // StackMapTable
1157 // SourceDebugExtension
1158 // LineNumberTable
1159 // LocalVariableTypeTable
1160
1161 // standard v52 attributes
1162
1163 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1164 protected void read(Symbol sym, int attrlen) {
1165 int newbp = bp + attrlen;
1166 if (saveParameterNames) {
1167 int numEntries = nextByte();
1168 allParameterAccessFlags = new int[numEntries];
1169 parameterNameIndicesMp = new int[numEntries];
1170 parameterAccessFlags = new int[numEntries];
1171 int allParamIndex = 0;
1172 int index = 0;
1173 for (int i = 0; i < numEntries; i++) {
1174 int nameIndex = nextChar();
1175 int flags = nextChar();
1176 allParameterAccessFlags[allParamIndex++] = flags;
1177 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) {
1178 continue;
1179 }
1180 parameterNameIndicesMp[index] = nameIndex;
1181 parameterAccessFlags[index] = flags;
1182 index++;
1183 }
1184 }
1185 bp = newbp;
1186 }
1187 },
1188
1189 // standard v53 attributes
1190
1191 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1192 @Override
1193 protected boolean accepts(AttributeKind kind) {
1194 return super.accepts(kind) && allowModules;
1195 }
1196 protected void read(Symbol sym, int attrLen) {
1197 if (sym.kind == TYP && sym.owner.kind == MDL) {
1198 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1199 ListBuffer<Directive> directives = new ListBuffer<>();
1200
1201 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName);
1202 if (currentModule.name != moduleName) {
1203 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1204 }
1205
1206 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar());
1207 msym.flags.addAll(moduleFlags);
1208 msym.version = optPoolEntry(nextChar(), poolReader::getName, null);
1209
1210 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1211 int nrequires = nextChar();
1212 for (int i = 0; i < nrequires; i++) {
1213 ModuleSymbol rsym = poolReader.getModule(nextChar());
1214 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1215 if (rsym == syms.java_base && majorVersion >= V54.major) {
1216 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1217 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1218 }
1219 }
1220 nextChar(); // skip compiled version
1221 requires.add(new RequiresDirective(rsym, flags));
1222 }
1223 msym.requires = requires.toList();
1224 directives.addAll(msym.requires);
1225
1226 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1227 int nexports = nextChar();
1228 for (int i = 0; i < nexports; i++) {
1229 PackageSymbol p = poolReader.getPackage(nextChar());
1230 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1231 int nto = nextChar();
1232 List<ModuleSymbol> to;
1233 if (nto == 0) {
1234 to = null;
1235 } else {
1236 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1237 for (int t = 0; t < nto; t++)
1238 lb.append(poolReader.getModule(nextChar()));
1239 to = lb.toList();
1240 }
1241 exports.add(new ExportsDirective(p, to, flags));
1242 }
1243 msym.exports = exports.toList();
1244 directives.addAll(msym.exports);
1245 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1246 int nopens = nextChar();
1247 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1248 throw badClassFile("module.non.zero.opens", currentModule.name);
1249 }
1250 for (int i = 0; i < nopens; i++) {
1251 PackageSymbol p = poolReader.getPackage(nextChar());
1252 Set<OpensFlag> flags = readOpensFlags(nextChar());
1253 int nto = nextChar();
1254 List<ModuleSymbol> to;
1255 if (nto == 0) {
1256 to = null;
1257 } else {
1258 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1259 for (int t = 0; t < nto; t++)
1260 lb.append(poolReader.getModule(nextChar()));
1261 to = lb.toList();
1262 }
1263 opens.add(new OpensDirective(p, to, flags));
1264 }
1265 msym.opens = opens.toList();
1266 directives.addAll(msym.opens);
1267
1268 msym.directives = directives.toList();
1269
1270 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1271 int nuses = nextChar();
1272 for (int i = 0; i < nuses; i++) {
1273 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1274 uses.add(new InterimUsesDirective(srvc));
1275 }
1276 interimUses = uses.toList();
1277
1278 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1279 int nprovides = nextChar();
1280 for (int p = 0; p < nprovides; p++) {
1281 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1282 int nimpls = nextChar();
1283 ListBuffer<Name> impls = new ListBuffer<>();
1284 for (int i = 0; i < nimpls; i++) {
1285 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper));
1286 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1287 }
1288 }
1289 interimProvides = provides.toList();
1290 }
1291 }
1292
1293 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException {
1294 byte[] buf = ClassFile.internalize(arr, offset, length);
1295 try {
1296 return names.fromUtf(buf, 0, buf.length, utf8validation);
1297 } catch (InvalidUtfException e) {
1298 if (warnOnIllegalUtf8) {
1299 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
1300 Fragments.BadUtf8ByteSequenceAt(e.getOffset())));
1301 return names.fromUtfLax(buf, 0, buf.length);
1302 }
1303 throw e;
1304 }
1305 }
1306 },
1307
1308 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1309 @Override
1310 protected boolean accepts(AttributeKind kind) {
1311 return super.accepts(kind) && allowModules;
1312 }
1313 protected void read(Symbol sym, int attrLen) {
1314 if (sym.kind == TYP && sym.owner.kind == MDL) {
1315 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1316 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1317 }
1318 }
1319 },
1320
1321 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) {
1322 @Override
1323 protected boolean accepts(AttributeKind kind) {
1324 return super.accepts(kind) && allowRecords;
1325 }
1326 protected void read(Symbol sym, int attrLen) {
1327 if (sym.kind == TYP) {
1328 sym.flags_field |= RECORD;
1329 }
1330 int componentCount = nextChar();
1331 ListBuffer<RecordComponent> components = new ListBuffer<>();
1332 for (int i = 0; i < componentCount; i++) {
1333 Name name = poolReader.getName(nextChar());
1334 Type type = poolReader.getType(nextChar());
1335 RecordComponent c = new RecordComponent(name, type, sym);
1336 readAttrs(c, AttributeKind.MEMBER);
1337 components.add(c);
1338 }
1339 ((ClassSymbol) sym).setRecordComponents(components.toList());
1340 }
1341 },
1342 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) {
1343 @Override
1344 protected boolean accepts(AttributeKind kind) {
1345 return super.accepts(kind) && allowSealedTypes;
1346 }
1347 protected void read(Symbol sym, int attrLen) {
1348 if (sym.kind == TYP) {
1349 ListBuffer<Symbol> subtypes = new ListBuffer<>();
1350 int numberOfPermittedSubtypes = nextChar();
1351 for (int i = 0; i < numberOfPermittedSubtypes; i++) {
1352 subtypes.add(poolReader.getClass(nextChar()));
1353 }
1354 ((ClassSymbol)sym).setPermittedSubclasses(subtypes.toList());
1355 }
1356 }
1357 },
1358 };
1359
1360 for (AttributeReader r: readers)
1361 attributeReaders.put(r.name, r);
1362 }
1363
1364 protected void readEnclosingMethodAttr(Symbol sym) {
1365 // sym is a nested class with an "Enclosing Method" attribute
1366 // remove sym from it's current owners scope and place it in
1367 // the scope specified by the attribute
1368 sym.owner.members().remove(sym);
1369 ClassSymbol self = (ClassSymbol)sym;
1370 ClassSymbol c = poolReader.getClass(nextChar());
1371 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null);
1372
1373 if (c.members_field == null || c.kind != TYP)
1374 throw badClassFile("bad.enclosing.class", self, c);
1375
1376 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1377 if (nt != null && m == null)
1378 throw badEnclosingMethod(self);
1379
1380 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1381 self.owner = m != null ? m : c;
1382 if (self.name.isEmpty())
1383 self.fullname = names.empty;
1384 else
1385 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1386
1387 if (m != null) {
1388 ((ClassType)sym.type).setEnclosingType(m.type);
1389 } else if ((self.flags_field & STATIC) == 0) {
1390 ((ClassType)sym.type).setEnclosingType(c.type);
1391 } else {
1392 ((ClassType)sym.type).setEnclosingType(Type.noType);
1393 }
1394 enterTypevars(self, self.type);
1395 if (!missingTypeVariables.isEmpty()) {
1396 ListBuffer<Type> typeVars = new ListBuffer<>();
1397 for (Type typevar : missingTypeVariables) {
1398 typeVars.append(findTypeVar(typevar.tsym.name));
1399 }
1400 foundTypeVariables = typeVars.toList();
1401 } else {
1402 foundTypeVariables = List.nil();
1403 }
1404 }
1405
1406 // See java.lang.Class
1407 private Name simpleBinaryName(Name self, Name enclosing) {
1408 if (!self.startsWith(enclosing)) {
1409 throw badClassFile("bad.enclosing.method", self);
1410 }
1411
1412 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1413 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1414 throw badClassFile("bad.enclosing.method", self);
1415 int index = 1;
1416 while (index < simpleBinaryName.length() &&
1417 isAsciiDigit(simpleBinaryName.charAt(index)))
1418 index++;
1419 return names.fromString(simpleBinaryName.substring(index));
1420 }
1421
1422 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1423 if (nt == null)
1424 return null;
1425
1426 MethodType type = nt.type.asMethodType();
1427
1428 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1429 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1430 return (MethodSymbol)sym;
1431 }
1432
1433 if (nt.name != names.init)
1434 // not a constructor
1435 return null;
1436 if ((flags & INTERFACE) != 0)
1437 // no enclosing instance
1438 return null;
1439 if (nt.type.getParameterTypes().isEmpty())
1440 // no parameters
1441 return null;
1442
1443 // A constructor of an inner class.
1444 // Remove the first argument (the enclosing instance)
1445 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail,
1446 nt.type.getReturnType(),
1447 nt.type.getThrownTypes(),
1448 syms.methodClass));
1449 // Try searching again
1450 return findMethod(nt, scope, flags);
1451 }
1452
1453 /** Similar to Types.isSameType but avoids completion */
1454 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1455 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1456 .prepend(types.erasure(mt1.getReturnType()));
1457 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1458 while (!types1.isEmpty() && !types2.isEmpty()) {
1459 if (types1.head.tsym != types2.head.tsym)
1460 return false;
1461 types1 = types1.tail;
1462 types2 = types2.tail;
1463 }
1464 return types1.isEmpty() && types2.isEmpty();
1465 }
1466
1467 /**
1468 * Character.isDigit answers <tt>true</tt> to some non-ascii
1469 * digits. This one does not. <b>copied from java.lang.Class</b>
1470 */
1471 private static boolean isAsciiDigit(char c) {
1472 return '0' <= c && c <= '9';
1473 }
1474
1475 /** Read member attributes.
1476 */
1477 void readMemberAttrs(Symbol sym) {
1478 readAttrs(sym, AttributeKind.MEMBER);
1479 }
1480
1481 void readAttrs(Symbol sym, AttributeKind kind) {
1482 char ac = nextChar();
1483 for (int i = 0; i < ac; i++) {
1484 Name attrName = poolReader.getName(nextChar());
1485 int attrLen = nextInt();
1486 AttributeReader r = attributeReaders.get(attrName);
1487 if (r != null && r.accepts(kind))
1488 r.read(sym, attrLen);
1489 else {
1490 bp = bp + attrLen;
1491 }
1492 }
1493 }
1494
1495 private boolean readingClassAttr = false;
1496 private List<Type> missingTypeVariables = List.nil();
1497 private List<Type> foundTypeVariables = List.nil();
1498
1499 /** Read class attributes.
1500 */
1501 void readClassAttrs(ClassSymbol c) {
1502 readAttrs(c, AttributeKind.CLASS);
1503 }
1504
1505 /** Read code block.
1506 */
1507 Code readCode(Symbol owner) {
1508 nextChar(); // max_stack
1509 nextChar(); // max_locals
1510 final int code_length = nextInt();
1511 bp += code_length;
1512 final char exception_table_length = nextChar();
1513 bp += exception_table_length * 8;
1514 readMemberAttrs(owner);
1515 return null;
1516 }
1517
1518 /* **********************************************************************
1519 * Reading Java-language annotations
1520 ***********************************************************************/
1521
1522 /**
1523 * Save annotations.
1524 */
1525 List<CompoundAnnotationProxy> readAnnotations() {
1526 int numAttributes = nextChar();
1527 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1528 for (int i = 0; i < numAttributes; i++) {
1529 annotations.append(readCompoundAnnotation());
1530 }
1531 return annotations.toList();
1532 }
1533
1534 /** Attach annotations.
1535 */
1536 void attachAnnotations(final Symbol sym) {
1537 attachAnnotations(sym, readAnnotations());
1538 }
1539
1540 /**
1541 * Attach annotations.
1542 */
1543 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1544 if (annotations.isEmpty()) {
1545 return;
1546 }
1547 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1548 for (CompoundAnnotationProxy proxy : annotations) {
1549 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName())
1550 sym.flags_field |= PROPRIETARY;
1551 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) {
1552 if (profile != Profile.DEFAULT) {
1553 for (Pair<Name, Attribute> v : proxy.values) {
1554 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) {
1555 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) {
1556 sym.flags_field |= NOT_IN_PROFILE;
1557 }
1558 }
1559 }
1560 }
1561 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) {
1562 sym.flags_field |= PREVIEW_API;
1563 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1564 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) {
1565 Assert.check(sym.kind == TYP);
1566 sym.flags_field |= VALUE_BASED;
1567 } else if (proxy.type.tsym.flatName() == syms.migratedValueClassInternalType.tsym.flatName()) {
1568 Assert.check(sym.kind == TYP);
1569 sym.flags_field |= MIGRATED_VALUE_CLASS;
1570 if (needsValueFlag(sym, sym.flags_field)) {
1571 sym.flags_field |= VALUE_CLASS;
1572 sym.flags_field &= ~IDENTITY_TYPE;
1573 }
1574 } else if (proxy.type.tsym.flatName() == syms.restrictedInternalType.tsym.flatName()) {
1575 Assert.check(sym.kind == MTH);
1576 sym.flags_field |= RESTRICTED;
1577 } else if (proxy.type.tsym.flatName() == syms.requiresIdentityInternalType.tsym.flatName()) {
1578 Assert.check(sym.kind == VAR);
1579 sym.flags_field |= REQUIRES_IDENTITY;
1580 } else {
1581 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1582 target = proxy;
1583 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1584 repeatable = proxy;
1585 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1586 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1587 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL);
1588 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) {
1589 sym.flags_field |= PREVIEW_API;
1590 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1591 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) {
1592 sym.flags_field |= VALUE_BASED;
1593 } else if (proxy.type.tsym == syms.migratedValueClassType.tsym && sym.kind == TYP) {
1594 sym.flags_field |= MIGRATED_VALUE_CLASS;
1595 if (needsValueFlag(sym, sym.flags_field)) {
1596 sym.flags_field |= VALUE_CLASS;
1597 sym.flags_field &= ~IDENTITY_TYPE;
1598 }
1599 } else if (proxy.type.tsym == syms.restrictedType.tsym) {
1600 Assert.check(sym.kind == MTH);
1601 sym.flags_field |= RESTRICTED;
1602 } else if (proxy.type.tsym == syms.requiresIdentityType.tsym) {
1603 Assert.check(sym.kind == VAR);
1604 sym.flags_field |= REQUIRES_IDENTITY;
1605 }
1606 proxies.append(proxy);
1607 }
1608 }
1609 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1610 }
1611 //where:
1612 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) {
1613 for (Pair<Name, Attribute> v : proxy.values) {
1614 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) {
1615 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
1616 sym.flags_field |= flag;
1617 }
1618 }
1619 }
1620 }
1621
1622 /** Read parameter annotations.
1623 */
1624 void readParameterAnnotations(Symbol meth) {
1625 int numParameters;
1626 try {
1627 numParameters = buf.getByte(bp++) & 0xFF;
1628 } catch (UnderflowException e) {
1629 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1630 }
1631 if (parameterAnnotations == null) {
1632 parameterAnnotations = new ParameterAnnotations[numParameters];
1633 } else if (parameterAnnotations.length != numParameters) {
1634 //the RuntimeVisibleParameterAnnotations and RuntimeInvisibleParameterAnnotations
1635 //provide annotations for a different number of parameters, ignore:
1636 lint.logIfEnabled(LintWarnings.RuntimeVisibleInvisibleParamAnnotationsMismatch(currentClassFile));
1637 for (int pnum = 0; pnum < numParameters; pnum++) {
1638 readAnnotations();
1639 }
1640 parameterAnnotations = null;
1641 return ;
1642 }
1643 for (int pnum = 0; pnum < numParameters; pnum++) {
1644 if (parameterAnnotations[pnum] == null) {
1645 parameterAnnotations[pnum] = new ParameterAnnotations();
1646 }
1647 parameterAnnotations[pnum].add(readAnnotations());
1648 }
1649 }
1650
1651 void attachTypeAnnotations(final Symbol sym) {
1652 int numAttributes = nextChar();
1653 if (numAttributes != 0) {
1654 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1655 for (int i = 0; i < numAttributes; i++)
1656 proxies.append(readTypeAnnotation());
1657 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1658 }
1659 }
1660
1661 /** Attach the default value for an annotation element.
1662 */
1663 void attachAnnotationDefault(final Symbol sym) {
1664 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1665 final Attribute value = readAttributeValue();
1666
1667 // The default value is set later during annotation. It might
1668 // be the case that the Symbol sym is annotated _after_ the
1669 // repeating instances that depend on this default value,
1670 // because of this we set an interim value that tells us this
1671 // element (most likely) has a default.
1672 //
1673 // Set interim value for now, reset just before we do this
1674 // properly at annotate time.
1675 meth.defaultValue = value;
1676 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1677 }
1678
1679 Type readTypeOrClassSymbol(int i) {
1680 return readTypeToProxy(i);
1681 }
1682 Type readTypeToProxy(int i) {
1683 if (currentModule.module_info == currentOwner) {
1684 return new ProxyType(i);
1685 } else {
1686 return poolReader.getType(i);
1687 }
1688 }
1689
1690 CompoundAnnotationProxy readCompoundAnnotation() {
1691 Type t;
1692 if (currentModule.module_info == currentOwner) {
1693 int cpIndex = nextChar();
1694 t = new ProxyType(cpIndex);
1695 } else {
1696 t = readTypeOrClassSymbol(nextChar());
1697 }
1698 int numFields = nextChar();
1699 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1700 for (int i=0; i<numFields; i++) {
1701 Name name = poolReader.getName(nextChar());
1702 Attribute value = readAttributeValue();
1703 pairs.append(new Pair<>(name, value));
1704 }
1705 return new CompoundAnnotationProxy(t, pairs.toList());
1706 }
1707
1708 TypeAnnotationProxy readTypeAnnotation() {
1709 TypeAnnotationPosition position = readPosition();
1710 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1711
1712 return new TypeAnnotationProxy(proxy, position);
1713 }
1714
1715 TypeAnnotationPosition readPosition() {
1716 int tag = nextByte(); // TargetType tag is a byte
1717
1718 if (!TargetType.isValidTargetTypeValue(tag))
1719 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1720
1721 TargetType type = TargetType.fromTargetTypeValue(tag);
1722
1723 switch (type) {
1724 // instanceof
1725 case INSTANCEOF: {
1726 final int offset = nextChar();
1727 final TypeAnnotationPosition position =
1728 TypeAnnotationPosition.instanceOf(readTypePath());
1729 position.offset = offset;
1730 return position;
1731 }
1732 // new expression
1733 case NEW: {
1734 final int offset = nextChar();
1735 final TypeAnnotationPosition position =
1736 TypeAnnotationPosition.newObj(readTypePath());
1737 position.offset = offset;
1738 return position;
1739 }
1740 // constructor/method reference receiver
1741 case CONSTRUCTOR_REFERENCE: {
1742 final int offset = nextChar();
1743 final TypeAnnotationPosition position =
1744 TypeAnnotationPosition.constructorRef(readTypePath());
1745 position.offset = offset;
1746 return position;
1747 }
1748 case METHOD_REFERENCE: {
1749 final int offset = nextChar();
1750 final TypeAnnotationPosition position =
1751 TypeAnnotationPosition.methodRef(readTypePath());
1752 position.offset = offset;
1753 return position;
1754 }
1755 // local variable
1756 case LOCAL_VARIABLE: {
1757 final int table_length = nextChar();
1758 final int[] newLvarOffset = new int[table_length];
1759 final int[] newLvarLength = new int[table_length];
1760 final int[] newLvarIndex = new int[table_length];
1761
1762 for (int i = 0; i < table_length; ++i) {
1763 newLvarOffset[i] = nextChar();
1764 newLvarLength[i] = nextChar();
1765 newLvarIndex[i] = nextChar();
1766 }
1767
1768 final TypeAnnotationPosition position =
1769 TypeAnnotationPosition.localVariable(readTypePath());
1770 position.lvarOffset = newLvarOffset;
1771 position.lvarLength = newLvarLength;
1772 position.lvarIndex = newLvarIndex;
1773 return position;
1774 }
1775 // resource variable
1776 case RESOURCE_VARIABLE: {
1777 final int table_length = nextChar();
1778 final int[] newLvarOffset = new int[table_length];
1779 final int[] newLvarLength = new int[table_length];
1780 final int[] newLvarIndex = new int[table_length];
1781
1782 for (int i = 0; i < table_length; ++i) {
1783 newLvarOffset[i] = nextChar();
1784 newLvarLength[i] = nextChar();
1785 newLvarIndex[i] = nextChar();
1786 }
1787
1788 final TypeAnnotationPosition position =
1789 TypeAnnotationPosition.resourceVariable(readTypePath());
1790 position.lvarOffset = newLvarOffset;
1791 position.lvarLength = newLvarLength;
1792 position.lvarIndex = newLvarIndex;
1793 return position;
1794 }
1795 // exception parameter
1796 case EXCEPTION_PARAMETER: {
1797 final int exception_index = nextChar();
1798 final TypeAnnotationPosition position =
1799 TypeAnnotationPosition.exceptionParameter(readTypePath());
1800 position.setExceptionIndex(exception_index);
1801 return position;
1802 }
1803 // method receiver
1804 case METHOD_RECEIVER:
1805 return TypeAnnotationPosition.methodReceiver(readTypePath());
1806 // type parameter
1807 case CLASS_TYPE_PARAMETER: {
1808 final int parameter_index = nextByte();
1809 return TypeAnnotationPosition
1810 .typeParameter(readTypePath(), parameter_index);
1811 }
1812 case METHOD_TYPE_PARAMETER: {
1813 final int parameter_index = nextByte();
1814 return TypeAnnotationPosition
1815 .methodTypeParameter(readTypePath(), parameter_index);
1816 }
1817 // type parameter bound
1818 case CLASS_TYPE_PARAMETER_BOUND: {
1819 final int parameter_index = nextByte();
1820 final int bound_index = nextByte();
1821 return TypeAnnotationPosition
1822 .typeParameterBound(readTypePath(), parameter_index,
1823 bound_index);
1824 }
1825 case METHOD_TYPE_PARAMETER_BOUND: {
1826 final int parameter_index = nextByte();
1827 final int bound_index = nextByte();
1828 return TypeAnnotationPosition
1829 .methodTypeParameterBound(readTypePath(), parameter_index,
1830 bound_index);
1831 }
1832 // class extends or implements clause
1833 case CLASS_EXTENDS: {
1834 final int type_index = nextChar();
1835 return TypeAnnotationPosition.classExtends(readTypePath(),
1836 type_index);
1837 }
1838 // throws
1839 case THROWS: {
1840 final int type_index = nextChar();
1841 return TypeAnnotationPosition.methodThrows(readTypePath(),
1842 type_index);
1843 }
1844 // method parameter
1845 case METHOD_FORMAL_PARAMETER: {
1846 final int parameter_index = nextByte();
1847 return TypeAnnotationPosition.methodParameter(readTypePath(),
1848 parameter_index);
1849 }
1850 // type cast
1851 case CAST: {
1852 final int offset = nextChar();
1853 final int type_index = nextByte();
1854 final TypeAnnotationPosition position =
1855 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1856 position.offset = offset;
1857 return position;
1858 }
1859 // method/constructor/reference type argument
1860 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1861 final int offset = nextChar();
1862 final int type_index = nextByte();
1863 final TypeAnnotationPosition position = TypeAnnotationPosition
1864 .constructorInvocationTypeArg(readTypePath(), type_index);
1865 position.offset = offset;
1866 return position;
1867 }
1868 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1869 final int offset = nextChar();
1870 final int type_index = nextByte();
1871 final TypeAnnotationPosition position = TypeAnnotationPosition
1872 .methodInvocationTypeArg(readTypePath(), type_index);
1873 position.offset = offset;
1874 return position;
1875 }
1876 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1877 final int offset = nextChar();
1878 final int type_index = nextByte();
1879 final TypeAnnotationPosition position = TypeAnnotationPosition
1880 .constructorRefTypeArg(readTypePath(), type_index);
1881 position.offset = offset;
1882 return position;
1883 }
1884 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1885 final int offset = nextChar();
1886 final int type_index = nextByte();
1887 final TypeAnnotationPosition position = TypeAnnotationPosition
1888 .methodRefTypeArg(readTypePath(), type_index);
1889 position.offset = offset;
1890 return position;
1891 }
1892 // We don't need to worry about these
1893 case METHOD_RETURN:
1894 return TypeAnnotationPosition.methodReturn(readTypePath());
1895 case FIELD:
1896 return TypeAnnotationPosition.field(readTypePath());
1897 case UNKNOWN:
1898 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1899 default:
1900 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1901 }
1902 }
1903
1904 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1905 int len = nextByte();
1906 ListBuffer<Integer> loc = new ListBuffer<>();
1907 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1908 loc = loc.append(nextByte());
1909
1910 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1911
1912 }
1913
1914 /**
1915 * Helper function to read an optional pool entry (with given function); this is used while parsing
1916 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor,
1917 * as per JVMS.
1918 */
1919 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) {
1920 return (index == 0) ?
1921 defaultValue :
1922 poolFunc.apply(index);
1923 }
1924
1925 Attribute readAttributeValue() {
1926 char c;
1927 try {
1928 c = (char)buf.getByte(bp++);
1929 } catch (UnderflowException e) {
1930 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1931 }
1932 switch (c) {
1933 case 'B':
1934 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar()));
1935 case 'C':
1936 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar()));
1937 case 'D':
1938 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar()));
1939 case 'F':
1940 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar()));
1941 case 'I':
1942 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar()));
1943 case 'J':
1944 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar()));
1945 case 'S':
1946 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar()));
1947 case 'Z':
1948 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar()));
1949 case 's':
1950 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString());
1951 case 'e':
1952 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar()));
1953 case 'c':
1954 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1955 case '[': {
1956 int n = nextChar();
1957 ListBuffer<Attribute> l = new ListBuffer<>();
1958 for (int i=0; i<n; i++)
1959 l.append(readAttributeValue());
1960 return new ArrayAttributeProxy(l.toList());
1961 }
1962 case '@':
1963 return readCompoundAnnotation();
1964 default:
1965 throw new AssertionError("unknown annotation tag '" + c + "'");
1966 }
1967 }
1968
1969 interface ProxyVisitor extends Attribute.Visitor {
1970 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1971 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1972 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1973 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1974 }
1975
1976 static class EnumAttributeProxy extends Attribute {
1977 Type enumType;
1978 Name enumerator;
1979 public EnumAttributeProxy(Type enumType, Name enumerator) {
1980 super(null);
1981 this.enumType = enumType;
1982 this.enumerator = enumerator;
1983 }
1984 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1985 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1986 public String toString() {
1987 return "/*proxy enum*/" + enumType + "." + enumerator;
1988 }
1989 }
1990
1991 static class ClassAttributeProxy extends Attribute {
1992 Type classType;
1993 public ClassAttributeProxy(Type classType) {
1994 super(null);
1995 this.classType = classType;
1996 }
1997 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1998 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1999 public String toString() {
2000 return "/*proxy class*/" + classType + ".class";
2001 }
2002 }
2003
2004 static class ArrayAttributeProxy extends Attribute {
2005 List<Attribute> values;
2006 ArrayAttributeProxy(List<Attribute> values) {
2007 super(null);
2008 this.values = values;
2009 }
2010 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
2011 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2012 public String toString() {
2013 return "{" + values + "}";
2014 }
2015 }
2016
2017 /** A temporary proxy representing a compound attribute.
2018 */
2019 static class CompoundAnnotationProxy extends Attribute {
2020 final List<Pair<Name,Attribute>> values;
2021 public CompoundAnnotationProxy(Type type,
2022 List<Pair<Name,Attribute>> values) {
2023 super(type);
2024 this.values = values;
2025 }
2026 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
2027 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2028 public String toString() {
2029 StringBuilder buf = new StringBuilder();
2030 buf.append("@");
2031 buf.append(type.tsym.getQualifiedName());
2032 buf.append("/*proxy*/{");
2033 boolean first = true;
2034 for (List<Pair<Name,Attribute>> v = values;
2035 v.nonEmpty(); v = v.tail) {
2036 Pair<Name,Attribute> value = v.head;
2037 if (!first) buf.append(",");
2038 first = false;
2039 buf.append(value.fst);
2040 buf.append("=");
2041 buf.append(value.snd);
2042 }
2043 buf.append("}");
2044 return buf.toString();
2045 }
2046 }
2047
2048 /** A temporary proxy representing a type annotation.
2049 */
2050 static class TypeAnnotationProxy {
2051 final CompoundAnnotationProxy compound;
2052 final TypeAnnotationPosition position;
2053 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2054 TypeAnnotationPosition position) {
2055 this.compound = compound;
2056 this.position = position;
2057 }
2058 }
2059
2060 class AnnotationDeproxy implements ProxyVisitor {
2061 private ClassSymbol requestingOwner;
2062
2063 AnnotationDeproxy(ClassSymbol owner) {
2064 this.requestingOwner = owner;
2065 }
2066
2067 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2068 // also must fill in types!!!!
2069 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2070 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2071 buf.append(deproxyCompound(l.head));
2072 }
2073 return buf.toList();
2074 }
2075
2076 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2077 Type annotationType = resolvePossibleProxyType(a.type);
2078 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2079 for (List<Pair<Name,Attribute>> l = a.values;
2080 l.nonEmpty();
2081 l = l.tail) {
2082 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2083 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2084 }
2085 return new Attribute.Compound(annotationType, buf.toList());
2086 }
2087
2088 MethodSymbol findAccessMethod(Type container, Name name) {
2089 CompletionFailure failure = null;
2090 try {
2091 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2092 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2093 return (MethodSymbol) sym;
2094 }
2095 } catch (CompletionFailure ex) {
2096 failure = ex;
2097 }
2098 // The method wasn't found: emit a warning and recover
2099 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2100 try {
2101 if (failure == null) {
2102 lint.logIfEnabled(LintWarnings.AnnotationMethodNotFound(container, name));
2103 } else {
2104 lint.logIfEnabled(LintWarnings.AnnotationMethodNotFoundReason(container,
2105 name,
2106 failure.getDetailValue()));//diagnostic, if present
2107 }
2108 } finally {
2109 log.useSource(prevSource);
2110 }
2111 // Construct a new method type and symbol. Use bottom
2112 // type (typeof null) as return type because this type is
2113 // a subtype of all reference types and can be converted
2114 // to primitive types by unboxing.
2115 MethodType mt = new MethodType(List.nil(),
2116 syms.botType,
2117 List.nil(),
2118 syms.methodClass);
2119 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2120 }
2121
2122 Attribute result;
2123 Type type;
2124 Attribute deproxy(Type t, Attribute a) {
2125 Type oldType = type;
2126 try {
2127 type = t;
2128 a.accept(this);
2129 return result;
2130 } finally {
2131 type = oldType;
2132 }
2133 }
2134
2135 // implement Attribute.Visitor below
2136
2137 public void visitConstant(Attribute.Constant value) {
2138 // assert value.type == type;
2139 result = value;
2140 }
2141
2142 public void visitClass(Attribute.Class clazz) {
2143 result = clazz;
2144 }
2145
2146 public void visitEnum(Attribute.Enum e) {
2147 throw new AssertionError(); // shouldn't happen
2148 }
2149
2150 public void visitCompound(Attribute.Compound compound) {
2151 throw new AssertionError(); // shouldn't happen
2152 }
2153
2154 public void visitArray(Attribute.Array array) {
2155 throw new AssertionError(); // shouldn't happen
2156 }
2157
2158 public void visitError(Attribute.Error e) {
2159 throw new AssertionError(); // shouldn't happen
2160 }
2161
2162 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2163 // type.tsym.flatName() should == proxy.enumFlatName
2164 Type enumType = resolvePossibleProxyType(proxy.enumType);
2165 TypeSymbol enumTypeSym = enumType.tsym;
2166 VarSymbol enumerator = null;
2167 CompletionFailure failure = null;
2168 try {
2169 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2170 if (sym.kind == VAR) {
2171 enumerator = (VarSymbol)sym;
2172 break;
2173 }
2174 }
2175 }
2176 catch (CompletionFailure ex) {
2177 failure = ex;
2178 }
2179 if (enumerator == null) {
2180 if (failure != null) {
2181 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile,
2182 enumTypeSym,
2183 proxy.enumerator,
2184 failure.getDiagnostic()));
2185 } else {
2186 log.warning(Warnings.UnknownEnumConstant(currentClassFile,
2187 enumTypeSym,
2188 proxy.enumerator));
2189 }
2190 result = new Attribute.Enum(enumTypeSym.type,
2191 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2192 } else {
2193 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2194 }
2195 }
2196
2197 @Override
2198 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2199 Type classType = resolvePossibleProxyType(proxy.classType);
2200 result = new Attribute.Class(types, classType);
2201 }
2202
2203 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2204 int length = proxy.values.length();
2205 Attribute[] ats = new Attribute[length];
2206 Type elemtype = types.elemtype(type);
2207 int i = 0;
2208 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2209 ats[i++] = deproxy(elemtype, p.head);
2210 }
2211 result = new Attribute.Array(type, ats);
2212 }
2213
2214 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2215 result = deproxyCompound(proxy);
2216 }
2217
2218 Type resolvePossibleProxyType(Type t) {
2219 if (t instanceof ProxyType proxyType) {
2220 Assert.check(requestingOwner.owner instanceof ModuleSymbol);
2221 ModuleSymbol prevCurrentModule = currentModule;
2222 currentModule = (ModuleSymbol) requestingOwner.owner;
2223 try {
2224 return proxyType.resolve();
2225 } finally {
2226 currentModule = prevCurrentModule;
2227 }
2228 } else {
2229 return t;
2230 }
2231 }
2232 }
2233
2234 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2235 final MethodSymbol sym;
2236 final Attribute value;
2237 final JavaFileObject classFile = currentClassFile;
2238
2239 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2240 super(currentOwner.kind == MTH
2241 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2242 this.sym = sym;
2243 this.value = value;
2244 }
2245
2246 @Override
2247 public void run() {
2248 JavaFileObject previousClassFile = currentClassFile;
2249 try {
2250 // Reset the interim value set earlier in
2251 // attachAnnotationDefault().
2252 sym.defaultValue = null;
2253 currentClassFile = classFile;
2254 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2255 } finally {
2256 currentClassFile = previousClassFile;
2257 }
2258 }
2259
2260 @Override
2261 public String toString() {
2262 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2263 }
2264 }
2265
2266 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2267 final Symbol sym;
2268 final List<CompoundAnnotationProxy> l;
2269 final JavaFileObject classFile;
2270
2271 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2272 super(currentOwner.kind == MTH
2273 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2274 if (sym.kind == TYP && sym.owner.kind == MDL) {
2275 this.sym = sym.owner;
2276 } else {
2277 this.sym = sym;
2278 }
2279 this.l = l;
2280 this.classFile = currentClassFile;
2281 }
2282
2283 @Override
2284 public void run() {
2285 JavaFileObject previousClassFile = currentClassFile;
2286 try {
2287 currentClassFile = classFile;
2288 List<Attribute.Compound> newList = deproxyCompoundList(l);
2289 for (Attribute.Compound attr : newList) {
2290 if (attr.type.tsym == syms.deprecatedType.tsym) {
2291 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2292 Attribute forRemoval = attr.member(names.forRemoval);
2293 if (forRemoval instanceof Attribute.Constant constant) {
2294 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
2295 sym.flags_field |= DEPRECATED_REMOVAL;
2296 }
2297 }
2298 }
2299 }
2300 if (sym.annotationsPendingCompletion()) {
2301 sym.setDeclarationAttributes(newList);
2302 } else {
2303 sym.appendAttributes(newList);
2304 }
2305 } finally {
2306 currentClassFile = previousClassFile;
2307 }
2308 }
2309
2310 @Override
2311 public String toString() {
2312 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2313 }
2314 }
2315
2316 class TypeAnnotationCompleter extends AnnotationCompleter {
2317
2318 List<TypeAnnotationProxy> proxies;
2319
2320 TypeAnnotationCompleter(Symbol sym,
2321 List<TypeAnnotationProxy> proxies) {
2322 super(sym, List.nil());
2323 this.proxies = proxies;
2324 }
2325
2326 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2327 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2328 for (TypeAnnotationProxy proxy: proxies) {
2329 Attribute.Compound compound = deproxyCompound(proxy.compound);
2330 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2331 buf.add(typeCompound);
2332 }
2333 return buf.toList();
2334 }
2335
2336 @Override
2337 public void run() {
2338 JavaFileObject previousClassFile = currentClassFile;
2339 try {
2340 currentClassFile = classFile;
2341 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2342 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2343 addTypeAnnotationsToSymbol(sym, newList);
2344 } finally {
2345 currentClassFile = previousClassFile;
2346 }
2347 }
2348 }
2349
2350 /**
2351 * Rewrites types in the given symbol to include type annotations.
2352 *
2353 * <p>The list of type annotations includes annotations for all types in the signature of the
2354 * symbol. Associating the annotations with the correct type requires interpreting the JVMS
2355 * 4.7.20-A target_type to locate the correct type to rewrite, and then interpreting the JVMS
2356 * 4.7.20.2 type_path to associate the annotation with the correct contained type.
2357 */
2358 private void addTypeAnnotationsToSymbol(Symbol s, List<Attribute.TypeCompound> attributes) {
2359 try {
2360 new TypeAnnotationSymbolVisitor(attributes).visit(s, null);
2361 } catch (CompletionFailure ex) {
2362 JavaFileObject prev = log.useSource(currentClassFile);
2363 try {
2364 log.error(Errors.CantAttachTypeAnnotations(attributes, s.owner, s.name, ex.getDetailValue()));
2365 } finally {
2366 log.useSource(prev);
2367 }
2368 }
2369 }
2370
2371 private static class TypeAnnotationSymbolVisitor
2372 extends Types.DefaultSymbolVisitor<Void, Void> {
2373
2374 private final List<Attribute.TypeCompound> attributes;
2375
2376 private TypeAnnotationSymbolVisitor(List<Attribute.TypeCompound> attributes) {
2377 this.attributes = attributes;
2378 }
2379
2380 /**
2381 * A supertype_index value of 65535 specifies that the annotation appears on the superclass
2382 * in an extends clause of a class declaration, see JVMS 4.7.20.1
2383 */
2384 public static final int SUPERCLASS_INDEX = 65535;
2385
2386 @Override
2387 public Void visitClassSymbol(Symbol.ClassSymbol s, Void unused) {
2388 ClassType t = (ClassType) s.type;
2389 int i = 0;
2390 ListBuffer<Type> interfaces = new ListBuffer<>();
2391 for (Type itf : t.interfaces_field) {
2392 interfaces.add(addTypeAnnotations(itf, classExtends(i++)));
2393 }
2394 t.interfaces_field = interfaces.toList();
2395 t.supertype_field = addTypeAnnotations(t.supertype_field, classExtends(SUPERCLASS_INDEX));
2396 if (t.typarams_field != null) {
2397 t.typarams_field =
2398 rewriteTypeParameters(
2399 t.typarams_field, TargetType.CLASS_TYPE_PARAMETER_BOUND);
2400 }
2401 return null;
2402 }
2403
2404 @Override
2405 public Void visitMethodSymbol(Symbol.MethodSymbol s, Void unused) {
2406 Type t = s.type;
2407 if (t.hasTag(TypeTag.FORALL)) {
2408 Type.ForAll fa = (Type.ForAll) t;
2409 fa.tvars = rewriteTypeParameters(fa.tvars, TargetType.METHOD_TYPE_PARAMETER_BOUND);
2410 t = fa.qtype;
2411 }
2412 MethodType mt = (MethodType) t;
2413 ListBuffer<Type> argtypes = new ListBuffer<>();
2414 int i = 0;
2415 for (Symbol.VarSymbol param : s.params) {
2416 param.type = addTypeAnnotations(param.type, methodFormalParameter(i++));
2417 argtypes.add(param.type);
2418 }
2419 mt.argtypes = argtypes.toList();
2420 ListBuffer<Type> thrown = new ListBuffer<>();
2421 i = 0;
2422 for (Type thrownType : mt.thrown) {
2423 thrown.add(addTypeAnnotations(thrownType, thrownType(i++)));
2424 }
2425 mt.thrown = thrown.toList();
2426 /* possible information loss if the type of the method is void then we can't add type
2427 * annotations to it
2428 */
2429 if (!mt.restype.hasTag(TypeTag.VOID)) {
2430 mt.restype = addTypeAnnotations(mt.restype, TargetType.METHOD_RETURN);
2431 }
2432
2433 Type recvtype = mt.recvtype != null ? mt.recvtype : s.implicitReceiverType();
2434 if (recvtype != null) {
2435 Type annotated = addTypeAnnotations(recvtype, TargetType.METHOD_RECEIVER);
2436 if (annotated != recvtype) {
2437 mt.recvtype = annotated;
2438 }
2439 }
2440 return null;
2441 }
2442
2443 @Override
2444 public Void visitVarSymbol(Symbol.VarSymbol s, Void unused) {
2445 s.type = addTypeAnnotations(s.type, TargetType.FIELD);
2446 return null;
2447 }
2448
2449 @Override
2450 public Void visitSymbol(Symbol s, Void unused) {
2451 return null;
2452 }
2453
2454 private List<Type> rewriteTypeParameters(List<Type> tvars, TargetType boundType) {
2455 ListBuffer<Type> tvarbuf = new ListBuffer<>();
2456 int typeVariableIndex = 0;
2457 for (Type tvar : tvars) {
2458 Type bound = tvar.getUpperBound();
2459 if (bound.isCompound()) {
2460 ClassType ct = (ClassType) bound;
2461 int boundIndex = 0;
2462 if (ct.supertype_field != null) {
2463 ct.supertype_field =
2464 addTypeAnnotations(
2465 ct.supertype_field,
2466 typeParameterBound(
2467 boundType, typeVariableIndex, boundIndex++));
2468 }
2469 ListBuffer<Type> itfbuf = new ListBuffer<>();
2470 for (Type itf : ct.interfaces_field) {
2471 itfbuf.add(
2472 addTypeAnnotations(
2473 itf,
2474 typeParameterBound(
2475 boundType, typeVariableIndex, boundIndex++)));
2476 }
2477 ct.interfaces_field = itfbuf.toList();
2478 } else {
2479 bound =
2480 addTypeAnnotations(
2481 bound,
2482 typeParameterBound(
2483 boundType,
2484 typeVariableIndex,
2485 bound.isInterface() ? 1 : 0));
2486 }
2487 ((TypeVar) tvar).setUpperBound(bound);
2488 tvarbuf.add(tvar);
2489 typeVariableIndex++;
2490 }
2491 return tvarbuf.toList();
2492 }
2493
2494 private Type addTypeAnnotations(Type type, TargetType targetType) {
2495 return addTypeAnnotations(type, pos -> pos.type == targetType);
2496 }
2497
2498 private Type addTypeAnnotations(Type type, Predicate<TypeAnnotationPosition> filter) {
2499 Assert.checkNonNull(type);
2500
2501 // Find type annotations that match the given target type
2502 ListBuffer<Attribute.TypeCompound> filtered = new ListBuffer<>();
2503 for (Attribute.TypeCompound attribute : this.attributes) {
2504 if (filter.test(attribute.position)) {
2505 filtered.add(attribute);
2506 }
2507 }
2508 if (filtered.isEmpty()) {
2509 return type;
2510 }
2511
2512 // Group the matching annotations by their type path. Each group of annotations will be
2513 // added to a type at that location.
2514 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2515 attributesByPath = new HashMap<>();
2516 for (Attribute.TypeCompound attribute : filtered.toList()) {
2517 attributesByPath
2518 .computeIfAbsent(attribute.position.location, k -> new ListBuffer<>())
2519 .add(attribute);
2520 }
2521
2522 // Rewrite the type and add the annotations
2523 type = new TypeAnnotationStructuralTypeMapping(attributesByPath).visit(type, List.nil());
2524
2525 return type;
2526 }
2527
2528 private static Predicate<TypeAnnotationPosition> typeParameterBound(
2529 TargetType targetType, int parameterIndex, int boundIndex) {
2530 return pos ->
2531 pos.type == targetType
2532 && pos.parameter_index == parameterIndex
2533 && pos.bound_index == boundIndex;
2534 }
2535
2536 private static Predicate<TypeAnnotationPosition> methodFormalParameter(int index) {
2537 return pos ->
2538 pos.type == TargetType.METHOD_FORMAL_PARAMETER && pos.parameter_index == index;
2539 }
2540
2541 private static Predicate<TypeAnnotationPosition> thrownType(int index) {
2542 return pos -> pos.type == TargetType.THROWS && pos.type_index == index;
2543 }
2544
2545 private static Predicate<TypeAnnotationPosition> classExtends(int index) {
2546 return pos -> pos.type == TargetType.CLASS_EXTENDS && pos.type_index == index;
2547 }
2548 }
2549
2550 /**
2551 * A type mapping that rewrites the type to include type annotations.
2552 *
2553 * <p>This logic is similar to {@link Type.StructuralTypeMapping}, but also tracks the path to
2554 * the contained types being rewritten, and so cannot easily share the existing logic.
2555 */
2556 private static final class TypeAnnotationStructuralTypeMapping
2557 extends Types.TypeMapping<List<TypeAnnotationPosition.TypePathEntry>> {
2558
2559 private final Map<List<TypeAnnotationPosition.TypePathEntry>,
2560 ListBuffer<Attribute.TypeCompound>> attributesByPath;
2561
2562 private TypeAnnotationStructuralTypeMapping(
2563 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2564 attributesByPath) {
2565 this.attributesByPath = attributesByPath;
2566 }
2567
2568
2569 @Override
2570 public Type visitClassType(ClassType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2571 // As described in JVMS 4.7.20.2, type annotations on nested types are located with
2572 // 'left-to-right' steps starting on 'the outermost part of the type for which a type
2573 // annotation is admissible'. So the current path represents the outermost containing
2574 // type of the type being visited, and we add type path steps for every contained nested
2575 // type.
2576 Type outer = t.getEnclosingType();
2577 Type outer1 = outer != Type.noType ? visit(outer, path) : outer;
2578 for (Type curr = t.getEnclosingType();
2579 curr != Type.noType;
2580 curr = curr.getEnclosingType()) {
2581 path = path.append(TypeAnnotationPosition.TypePathEntry.INNER_TYPE);
2582 }
2583 List<Type> typarams = t.getTypeArguments();
2584 List<Type> typarams1 = rewriteTypeParams(path, typarams);
2585 if (outer1 != outer || typarams != typarams1) {
2586 t = new ClassType(outer1, typarams1, t.tsym, t.getMetadata());
2587 }
2588 return reannotate(t, path);
2589 }
2590
2591 private List<Type> rewriteTypeParams(
2592 List<TypeAnnotationPosition.TypePathEntry> path, List<Type> typarams) {
2593 var i = IntStream.iterate(0, x -> x + 1).iterator();
2594 return typarams.map(typaram -> visit(typaram,
2595 path.append(new TypeAnnotationPosition.TypePathEntry(
2596 TypeAnnotationPosition.TypePathEntryKind.TYPE_ARGUMENT, i.nextInt()))));
2597 }
2598
2599 @Override
2600 public Type visitWildcardType(
2601 WildcardType wt, List<TypeAnnotationPosition.TypePathEntry> path) {
2602 Type t = wt.type;
2603 if (t != null) {
2604 t = visit(t, path.append(TypeAnnotationPosition.TypePathEntry.WILDCARD));
2605 }
2606 if (t != wt.type) {
2607 wt = new WildcardType(t, wt.kind, wt.tsym, wt.bound, wt.getMetadata());
2608 }
2609 return reannotate(wt, path);
2610 }
2611
2612 @Override
2613 public Type visitArrayType(ArrayType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2614 Type elemtype = t.elemtype;
2615 Type elemtype1 =
2616 visit(elemtype, path.append(TypeAnnotationPosition.TypePathEntry.ARRAY));
2617 if (elemtype1 != elemtype) {
2618 t = new ArrayType(elemtype1, t.tsym, t.getMetadata());
2619 }
2620 return reannotate(t, path);
2621 }
2622
2623 @Override
2624 public Type visitType(Type t, List<TypeAnnotationPosition.TypePathEntry> path) {
2625 return reannotate(t, path);
2626 }
2627
2628 Type reannotate(Type type, List<TypeAnnotationPosition.TypePathEntry> path) {
2629 List<Attribute.TypeCompound> attributes = attributesForPath(path);
2630 if (attributes.isEmpty()) {
2631 return type;
2632 }
2633 // Runtime-visible and -invisible annotations are completed separately, so if the same
2634 // type has annotations from both it will get annotated twice.
2635 TypeMetadata.Annotations existing = type.getMetadata(TypeMetadata.Annotations.class);
2636 if (existing != null) {
2637 existing.annotationBuffer().addAll(attributes);
2638 return type;
2639 }
2640 return type.annotatedType(attributes);
2641 }
2642
2643 List<Attribute.TypeCompound> attributesForPath(
2644 List<TypeAnnotationPosition.TypePathEntry> path) {
2645 ListBuffer<Attribute.TypeCompound> attributes = attributesByPath.remove(path);
2646 return attributes != null ? attributes.toList() : List.nil();
2647 }
2648 }
2649
2650 /* **********************************************************************
2651 * Reading Symbols
2652 ***********************************************************************/
2653
2654 /** Read a field.
2655 */
2656 VarSymbol readField() {
2657 char rawFlags = nextChar();
2658 long flags = adjustFieldFlags(rawFlags);
2659 Name name = poolReader.getName(nextChar());
2660 Type type = poolReader.getType(nextChar());
2661 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2662 readMemberAttrs(v);
2663 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 ||
2664 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1)
2665 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v);
2666 return v;
2667 }
2668
2669 /** Read a method.
2670 */
2671 MethodSymbol readMethod() {
2672 char rawFlags = nextChar();
2673 long flags = adjustMethodFlags(rawFlags);
2674 Name name = poolReader.getName(nextChar());
2675 Type descriptorType = poolReader.getType(nextChar());
2676 Type type = descriptorType;
2677 if (currentOwner.isInterface() &&
2678 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2679 if (majorVersion > Version.V52.major ||
2680 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2681 if ((flags & (STATIC | PRIVATE)) == 0) {
2682 currentOwner.flags_field |= DEFAULT;
2683 flags |= DEFAULT | ABSTRACT;
2684 }
2685 } else {
2686 //protect against ill-formed classfiles
2687 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2688 Integer.toString(majorVersion),
2689 Integer.toString(minorVersion));
2690 }
2691 }
2692 validateMethodType(name, type);
2693 boolean forceLocal = false;
2694 if (name == names.init && currentOwner.hasOuterInstance()) {
2695 // Sometimes anonymous classes don't have an outer
2696 // instance, however, there is no reliable way to tell so
2697 // we never strip this$n
2698 // ditto for local classes. Local classes that have an enclosing method set
2699 // won't pass the "hasOuterInstance" check above, but those that don't have an
2700 // enclosing method (i.e. from initializers) will pass that check.
2701 boolean local = forceLocal =
2702 !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2703 if (!currentOwner.name.isEmpty() && !local)
2704 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2705 type.getReturnType(),
2706 type.getThrownTypes(),
2707 syms.methodClass);
2708 }
2709 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2710 if (types.isSignaturePolymorphic(m)) {
2711 m.flags_field |= SIGNATURE_POLYMORPHIC;
2712 }
2713 if (saveParameterNames)
2714 initParameterNames(m);
2715 Symbol prevOwner = currentOwner;
2716 currentOwner = m;
2717 try {
2718 readMemberAttrs(m);
2719 } finally {
2720 currentOwner = prevOwner;
2721 }
2722 validateMethodType(name, m.type);
2723 adjustParameterAnnotations(m, descriptorType, forceLocal);
2724 setParameters(m, type);
2725
2726 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1)
2727 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m);
2728 if ((flags & VARARGS) != 0) {
2729 final Type last = type.getParameterTypes().last();
2730 if (last == null || !last.hasTag(ARRAY)) {
2731 m.flags_field &= ~VARARGS;
2732 throw badClassFile("malformed.vararg.method", m);
2733 }
2734 }
2735
2736 return m;
2737 }
2738
2739 void validateMethodType(Name name, Type t) {
2740 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) ||
2741 (name == names.init && !t.getReturnType().hasTag(TypeTag.VOID))) {
2742 throw badClassFile("method.descriptor.invalid", name);
2743 }
2744 }
2745
2746 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2747 if (args.isEmpty()) {
2748 return args;
2749 }
2750 boolean isVarargs = (flags & VARARGS) != 0;
2751 if (isVarargs) {
2752 Type varargsElem = args.last();
2753 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2754 for (Type t : args) {
2755 adjustedArgs.append(t != varargsElem ?
2756 t :
2757 ((ArrayType)t).makeVarargs());
2758 }
2759 args = adjustedArgs.toList();
2760 }
2761 return args.tail;
2762 }
2763
2764 /**
2765 * Init the parameter names array.
2766 * Parameter names are currently inferred from the names in the
2767 * LocalVariableTable attributes of a Code attribute.
2768 * (Note: this means parameter names are currently not available for
2769 * methods without a Code attribute.)
2770 * This method initializes an array in which to store the name indexes
2771 * of parameter names found in LocalVariableTable attributes. It is
2772 * slightly supersized to allow for additional slots with a start_pc of 0.
2773 */
2774 void initParameterNames(MethodSymbol sym) {
2775 // make allowance for synthetic parameters.
2776 final int excessSlots = 4;
2777 int expectedParameterSlots =
2778 Code.width(sym.type.getParameterTypes()) + excessSlots;
2779 if (parameterNameIndicesLvt == null
2780 || parameterNameIndicesLvt.length < expectedParameterSlots) {
2781 parameterNameIndicesLvt = new int[expectedParameterSlots];
2782 } else
2783 Arrays.fill(parameterNameIndicesLvt, 0);
2784 }
2785
2786 /**
2787 * Set the parameters for a method symbol, including any names and
2788 * annotations that were read.
2789 *
2790 * <p>The type of the symbol may have changed while reading the
2791 * method attributes (see the Signature attribute). This may be
2792 * because of generic information or because anonymous synthetic
2793 * parameters were added. The original type (as read from the
2794 * method descriptor) is used to help guess the existence of
2795 * anonymous synthetic parameters.
2796 */
2797 void setParameters(MethodSymbol sym, Type jvmType) {
2798 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2799 // the code in readMethod may have skipped the first
2800 // parameter when setting up the MethodType. If so, we
2801 // make a corresponding allowance here for the position of
2802 // the first parameter. Note that this assumes the
2803 // skipped parameter has a width of 1 -- i.e. it is not
2804 // a double width type (long or double.)
2805 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2806 // Sometimes anonymous classes don't have an outer
2807 // instance, however, there is no reliable way to tell so
2808 // we never strip this$n
2809 if (!currentOwner.name.isEmpty())
2810 firstParamLvt += 1;
2811 }
2812
2813 if (sym.type != jvmType) {
2814 // reading the method attributes has caused the
2815 // symbol's type to be changed. (i.e. the Signature
2816 // attribute.) This may happen if there are hidden
2817 // (synthetic) parameters in the descriptor, but not
2818 // in the Signature. The position of these hidden
2819 // parameters is unspecified; for now, assume they are
2820 // at the beginning, and so skip over them. The
2821 // primary case for this is two hidden parameters
2822 // passed into Enum constructors.
2823 int skip = Code.width(jvmType.getParameterTypes())
2824 - Code.width(sym.type.getParameterTypes());
2825 firstParamLvt += skip;
2826 }
2827 Set<Name> paramNames = new HashSet<>();
2828 ListBuffer<VarSymbol> params = new ListBuffer<>();
2829 // we maintain two index pointers, one for the LocalVariableTable attribute
2830 // and the other for the MethodParameters attribute.
2831 // This is needed as the MethodParameters attribute may contain
2832 // name_index = 0 in which case we want to fall back to the LocalVariableTable.
2833 // In such case, we still want to read the flags from the MethodParameters with that index.
2834 int nameIndexLvt = firstParamLvt;
2835 int nameIndexMp = 0;
2836 int annotationIndex = 0;
2837 for (Type t: sym.type.getParameterTypes()) {
2838 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames);
2839 params.append(param);
2840 if (parameterAnnotations != null) {
2841 ParameterAnnotations annotations = parameterAnnotations[annotationIndex];
2842 if (annotations != null && annotations.proxies != null) {
2843 attachAnnotations(param, annotations.proxies);
2844 }
2845 }
2846 nameIndexLvt += Code.width(t);
2847 nameIndexMp++;
2848 annotationIndex++;
2849 }
2850 Assert.check(parameterAnnotations == null ||
2851 parameterAnnotations.length == annotationIndex);
2852 Assert.checkNull(sym.params);
2853 sym.params = params.toList();
2854 parameterAnnotations = null;
2855 parameterNameIndicesLvt = null;
2856 parameterNameIndicesMp = null;
2857 allParameterAccessFlags = null;
2858 parameterAccessFlags = null;
2859 }
2860
2861 void adjustParameterAnnotations(MethodSymbol sym, Type methodDescriptor,
2862 boolean forceLocal) {
2863 if (parameterAnnotations == null) {
2864 return ;
2865 }
2866
2867 //the specification for Runtime(In)VisibleParameterAnnotations does not
2868 //enforce any mapping between the method parameters and the recorded
2869 //parameter annotation. Attempt a number of heuristics to adjust the
2870 //adjust parameterAnnotations to the percieved number of parameters:
2871
2872 int methodParameterCount = sym.type.getParameterTypes().size();
2873
2874 if (methodParameterCount == parameterAnnotations.length) {
2875 //we've got exactly as many parameter annotations as are parameters
2876 //of the method (after considering a possible Signature attribute),
2877 //no need to do anything. the parameter creation code will use
2878 //the 1-1 mapping to restore the annotations:
2879 return ;
2880 }
2881
2882 if (allParameterAccessFlags != null) {
2883 //MethodParameters attribute present, use it:
2884
2885 //count the number of non-synthetic and non-mandatory parameters:
2886 int realParameters = 0;
2887
2888 for (int i = 0; i < allParameterAccessFlags.length; i++) {
2889 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2890 realParameters++;
2891 }
2892 }
2893
2894 int methodDescriptorParameterCount = methodDescriptor.getParameterTypes().size();
2895
2896 if (realParameters == parameterAnnotations.length &&
2897 allParameterAccessFlags.length == methodDescriptorParameterCount) {
2898 //if we have parameter annotations for each non-synthetic/mandatory parameter,
2899 //and if Signature was not present, expand the parameterAnnotations to cover
2900 //all the method descriptor's parameters:
2901 if (sym.type == methodDescriptor) {
2902 ParameterAnnotations[] newParameterAnnotations =
2903 new ParameterAnnotations[methodParameterCount];
2904 int srcIndex = 0;
2905
2906 for (int i = 0; i < methodParameterCount; i++) {
2907 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2908 newParameterAnnotations[i] = parameterAnnotations[srcIndex++];
2909 }
2910 }
2911
2912 parameterAnnotations = newParameterAnnotations;
2913 } else {
2914 dropParameterAnnotations();
2915 }
2916 } else if (realParameters == methodParameterCount &&
2917 methodDescriptorParameterCount == parameterAnnotations.length &&
2918 allParameterAccessFlags.length == methodDescriptorParameterCount) {
2919 //if there are as many parameter annotations as parameters in
2920 //the method descriptor, and as many real parameters as parameters
2921 //in the method's type (after accounting for Signature), shrink
2922 //the parameterAnnotations to only cover the parameters from
2923 //the method's type:
2924 ParameterAnnotations[] newParameterAnnotations =
2925 new ParameterAnnotations[methodParameterCount];
2926 int targetIndex = 0;
2927
2928 for (int i = 0; i < parameterAnnotations.length; i++) {
2929 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2930 newParameterAnnotations[targetIndex++] = parameterAnnotations[i];
2931 }
2932 }
2933
2934 parameterAnnotations = newParameterAnnotations;
2935 } else {
2936 dropParameterAnnotations();
2937 }
2938 return ;
2939 }
2940
2941 if (!sym.isConstructor()) {
2942 //if the number of parameter annotations and the number of parameters
2943 //don't match, we don't have any heuristics to map one to the other
2944 //unless the method is a constructor:
2945 dropParameterAnnotations();
2946 return ;
2947 }
2948
2949 if (sym.owner.isEnum()) {
2950 if (methodParameterCount == parameterAnnotations.length + 2 &&
2951 sym.type == methodDescriptor) {
2952 //handle constructors of enum types without the Signature attribute -
2953 //there are the two synthetic parameters (name and ordinal) in the
2954 //constructor, but there may be only parameter annotations for the
2955 //real non-synthetic parameters:
2956 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[parameterAnnotations.length + 2];
2957 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 2, parameterAnnotations.length);
2958 parameterAnnotations = newParameterAnnotations;
2959 return ;
2960 }
2961 } else if (sym.owner.isDirectlyOrIndirectlyLocal() || forceLocal) {
2962 //local class may capture the enclosing instance (as the first parameter),
2963 //and local variables (as trailing parameters)
2964 //if there are less parameter annotations than parameters, put the existing
2965 //ones starting with offset:
2966 if (methodParameterCount > parameterAnnotations.length &&
2967 sym.type == methodDescriptor) {
2968 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[methodParameterCount];
2969 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 1, parameterAnnotations.length);
2970 parameterAnnotations = newParameterAnnotations;
2971 return ;
2972 }
2973 }
2974
2975 //no heuristics worked, drop the annotations:
2976 dropParameterAnnotations();
2977 }
2978
2979 private void dropParameterAnnotations() {
2980 parameterAnnotations = null;
2981 lint.logIfEnabled(LintWarnings.RuntimeInvisibleParameterAnnotations(currentClassFile));
2982 }
2983 /**
2984 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method.
2985 * Flags are optionally read from the MethodParameters attribute.
2986 * Names are optionally read from the MethodParameters attribute. If the constant pool index
2987 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute.
2988 * @param mpIndex the index of the parameter in the MethodParameters attribute
2989 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute
2990 */
2991 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) {
2992 long flags = PARAMETER;
2993 Name argName;
2994 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length
2995 && parameterAccessFlags[mpIndex] != 0) {
2996 flags |= parameterAccessFlags[mpIndex];
2997 }
2998 if (parameterNameIndicesMp != null && mpIndex < parameterNameIndicesMp.length
2999 // if name_index is 0, then we might still get a name from the LocalVariableTable
3000 && parameterNameIndicesMp[mpIndex] != 0) {
3001 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty);
3002 flags |= NAME_FILLED;
3003 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length
3004 && parameterNameIndicesLvt[lvtIndex] != 0) {
3005 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty);
3006 flags |= NAME_FILLED;
3007 } else {
3008 String prefix = "arg";
3009 while (true) {
3010 argName = names.fromString(prefix + exclude.size());
3011 if (!exclude.contains(argName))
3012 break;
3013 prefix += "$";
3014 }
3015 }
3016 exclude.add(argName);
3017 return new ParamSymbol(flags, argName, t, owner);
3018 }
3019
3020 /**
3021 * skip n bytes
3022 */
3023 void skipBytes(int n) {
3024 bp = bp + n;
3025 }
3026
3027 /** Skip a field or method
3028 */
3029 void skipMember() {
3030 bp = bp + 6;
3031 char ac = nextChar();
3032 for (int i = 0; i < ac; i++) {
3033 bp = bp + 2;
3034 int attrLen = nextInt();
3035 bp = bp + attrLen;
3036 }
3037 }
3038
3039 void skipInnerClasses() {
3040 int n = nextChar();
3041 for (int i = 0; i < n; i++) {
3042 nextChar();
3043 nextChar();
3044 nextChar();
3045 nextChar();
3046 }
3047 }
3048
3049 /** Enter type variables of this classtype and all enclosing ones in
3050 * `typevars'.
3051 */
3052 protected void enterTypevars(Symbol sym, Type t) {
3053 if (t.getEnclosingType() != null) {
3054 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
3055 enterTypevars(sym.owner, t.getEnclosingType());
3056 }
3057 } else if (sym.kind == MTH && !sym.isStatic()) {
3058 enterTypevars(sym.owner, sym.owner.type);
3059 }
3060 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
3061 typevars.enter(xs.head.tsym);
3062 }
3063 }
3064
3065 protected ClassSymbol enterClass(Name name) {
3066 return syms.enterClass(currentModule, name);
3067 }
3068
3069 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
3070 return syms.enterClass(currentModule, name, owner);
3071 }
3072
3073 /** Read contents of a given class symbol `c'. Both external and internal
3074 * versions of an inner class are read.
3075 */
3076 void readClass(ClassSymbol c) {
3077 ClassType ct = (ClassType)c.type;
3078
3079 // allocate scope for members
3080 c.members_field = WriteableScope.create(c);
3081
3082 // prepare type variable table
3083 typevars = typevars.dup(currentOwner);
3084 if (ct.getEnclosingType().hasTag(CLASS))
3085 enterTypevars(c.owner, ct.getEnclosingType());
3086
3087 // read flags, or skip if this is an inner class
3088 long f = nextChar();
3089 long flags = adjustClassFlags(c, f);
3090 if ((flags & MODULE) == 0) {
3091 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags;
3092 // read own class name and check that it matches
3093 currentModule = c.packge().modle;
3094 ClassSymbol self = poolReader.getClass(nextChar());
3095 if (c != self) {
3096 throw badClassFile("class.file.wrong.class",
3097 self.flatname);
3098 }
3099 } else {
3100 if (majorVersion < Version.V53.major) {
3101 throw badClassFile("anachronistic.module.info",
3102 Integer.toString(majorVersion),
3103 Integer.toString(minorVersion));
3104 }
3105 c.flags_field = flags;
3106 if (c.owner.kind != MDL) {
3107 throw badClassFile("module.info.definition.expected");
3108 }
3109 currentModule = (ModuleSymbol) c.owner;
3110 int this_class = nextChar();
3111 // temp, no check on this_class
3112 }
3113
3114 // class attributes must be read before class
3115 // skip ahead to read class attributes
3116 int startbp = bp;
3117 nextChar();
3118 char interfaceCount = nextChar();
3119 bp += interfaceCount * 2;
3120 char fieldCount = nextChar();
3121 for (int i = 0; i < fieldCount; i++) skipMember();
3122 char methodCount = nextChar();
3123 for (int i = 0; i < methodCount; i++) skipMember();
3124 readClassAttrs(c);
3125
3126 if (!c.getPermittedSubclasses().isEmpty()) {
3127 c.flags_field |= SEALED;
3128 }
3129
3130 // reset and read rest of classinfo
3131 bp = startbp;
3132 int n = nextChar();
3133 if ((flags & MODULE) != 0 && n > 0) {
3134 throw badClassFile("module.info.invalid.super.class");
3135 }
3136 if (ct.supertype_field == null)
3137 ct.supertype_field =
3138 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType);
3139 n = nextChar();
3140 List<Type> is = List.nil();
3141 for (int i = 0; i < n; i++) {
3142 Type _inter = poolReader.getClass(nextChar()).erasure(types);
3143 is = is.prepend(_inter);
3144 }
3145 if (ct.interfaces_field == null)
3146 ct.interfaces_field = is.reverse();
3147
3148 Assert.check(fieldCount == nextChar());
3149 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
3150 Assert.check(methodCount == nextChar());
3151 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
3152 if (c.isRecord()) {
3153 for (RecordComponent rc: c.getRecordComponents()) {
3154 rc.accessor = lookupMethod(c, rc.name, List.nil());
3155 }
3156 }
3157 typevars = typevars.leave();
3158 }
3159
3160 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) {
3161 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) {
3162 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) {
3163 return (MethodSymbol) s;
3164 }
3165 }
3166 return null;
3167 }
3168
3169 /** Read inner class info. For each inner/outer pair allocate a
3170 * member class.
3171 */
3172 void readInnerClasses(ClassSymbol c) {
3173 int n = nextChar();
3174 for (int i = 0; i < n; i++) {
3175 nextChar(); // skip inner class symbol
3176 int outerIdx = nextChar();
3177 int nameIdx = nextChar();
3178 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null);
3179 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty);
3180 if (name == null) name = names.empty;
3181 long flags = adjustClassFlags(c, nextChar());
3182 if (outer != null) { // we have a member class
3183 if (name == names.empty)
3184 name = names.one;
3185 ClassSymbol member = enterClass(name, outer);
3186 if ((flags & STATIC) == 0) {
3187 ((ClassType)member.type).setEnclosingType(outer.type);
3188 if (member.erasure_field != null)
3189 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
3190 }
3191 if (c == outer && member.owner == c) {
3192 member.flags_field = flags;
3193 enterMember(c, member);
3194 }
3195 }
3196 }
3197 }
3198
3199 /** Read a class definition from the bytes in buf.
3200 */
3201 private void readClassBuffer(ClassSymbol c) throws IOException {
3202 int magic = nextInt();
3203 if (magic != JAVA_MAGIC)
3204 throw badClassFile("illegal.start.of.class.file");
3205
3206 minorVersion = nextChar();
3207 majorVersion = nextChar();
3208 int maxMajor = Version.MAX().major;
3209 int maxMinor = Version.MAX().minor;
3210 previewClassFile =
3211 minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3212 if (majorVersion > maxMajor ||
3213 majorVersion * 1000 + minorVersion <
3214 Version.MIN().major * 1000 + Version.MIN().minor) {
3215 if (majorVersion == (maxMajor + 1) && !previewClassFile)
3216 log.warning(Warnings.BigMajorVersion(currentClassFile,
3217 majorVersion,
3218 maxMajor));
3219 else
3220 throw badClassFile("wrong.version",
3221 Integer.toString(majorVersion),
3222 Integer.toString(minorVersion),
3223 Integer.toString(maxMajor),
3224 Integer.toString(maxMinor));
3225 }
3226 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT;
3227
3228 if (previewClassFile) {
3229 if (!preview.isEnabled()) {
3230 log.error(preview.disabledError(currentClassFile, majorVersion));
3231 } else {
3232 preview.warnPreview(c.classfile, majorVersion);
3233 }
3234 }
3235
3236 poolReader = new PoolReader(this, names, syms);
3237 bp = poolReader.readPool(buf, bp);
3238 if (signatureBuffer.length < bp) {
3239 int ns = Integer.highestOneBit(bp) << 1;
3240 signatureBuffer = new byte[ns];
3241 }
3242 readClass(c);
3243 }
3244
3245 public void readClassFile(ClassSymbol c) {
3246 currentOwner = c;
3247 currentClassFile = c.classfile;
3248 warnedAttrs.clear();
3249 filling = true;
3250 target = null;
3251 repeatable = null;
3252 try {
3253 bp = 0;
3254 buf.reset();
3255 try (InputStream input = c.classfile.openInputStream()) {
3256 buf.appendStream(input);
3257 }
3258 readClassBuffer(c);
3259 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
3260 List<Type> missing = missingTypeVariables;
3261 List<Type> found = foundTypeVariables;
3262 missingTypeVariables = List.nil();
3263 foundTypeVariables = List.nil();
3264 interimUses = List.nil();
3265 interimProvides = List.nil();
3266 filling = false;
3267 ClassType ct = (ClassType)currentOwner.type;
3268 ct.supertype_field =
3269 types.subst(ct.supertype_field, missing, found);
3270 ct.interfaces_field =
3271 types.subst(ct.interfaces_field, missing, found);
3272 ct.typarams_field =
3273 types.substBounds(ct.typarams_field, missing, found);
3274 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
3275 types.head.tsym.type = types.head;
3276 }
3277 } else if (missingTypeVariables.isEmpty() !=
3278 foundTypeVariables.isEmpty()) {
3279 Name name = missingTypeVariables.head.tsym.name;
3280 throw badClassFile("undecl.type.var", name);
3281 }
3282
3283 if ((c.flags_field & Flags.ANNOTATION) != 0) {
3284 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
3285 } else {
3286 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
3287 }
3288
3289 if (c == currentModule.module_info) {
3290 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
3291 Assert.check(currentModule.isCompleted());
3292 currentModule.usesProvidesCompleter =
3293 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
3294 } else {
3295 currentModule.uses = List.nil();
3296 currentModule.provides = List.nil();
3297 }
3298 }
3299 } catch (IOException | ClosedFileSystemException ex) {
3300 throw badClassFile("unable.to.access.file", ex.toString());
3301 } catch (ArrayIndexOutOfBoundsException ex) {
3302 throw badClassFile("bad.class.file", c.flatname);
3303 } finally {
3304 interimUses = List.nil();
3305 interimProvides = List.nil();
3306 missingTypeVariables = List.nil();
3307 foundTypeVariables = List.nil();
3308 filling = false;
3309 }
3310 }
3311
3312 /** We can only read a single class file at a time; this
3313 * flag keeps track of when we are currently reading a class
3314 * file.
3315 */
3316 public boolean filling = false;
3317
3318 /* **********************************************************************
3319 * Adjusting flags
3320 ***********************************************************************/
3321
3322 long adjustFieldFlags(long flags) {
3323 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3324 if (allowValueClasses && previewClassFile && (flags & ACC_STRICT) != 0) {
3325 flags &= ~ACC_STRICT;
3326 flags |= STRICT;
3327 }
3328 return flags;
3329 }
3330
3331 long adjustMethodFlags(long flags) {
3332 if ((flags & ACC_BRIDGE) != 0) {
3333 flags &= ~ACC_BRIDGE;
3334 flags |= BRIDGE;
3335 }
3336 if ((flags & ACC_VARARGS) != 0) {
3337 flags &= ~ACC_VARARGS;
3338 flags |= VARARGS;
3339 }
3340 return flags;
3341 }
3342
3343 long adjustClassFlags(ClassSymbol c, long flags) {
3344 if ((flags & ACC_MODULE) != 0) {
3345 flags &= ~ACC_MODULE;
3346 flags |= MODULE;
3347 }
3348 if (((flags & ACC_IDENTITY) != 0 && !isMigratedValueClass(flags))
3349 || (majorVersion <= Version.MAX().major && minorVersion != PREVIEW_MINOR_VERSION && (flags & INTERFACE) == 0)) {
3350 flags |= IDENTITY_TYPE;
3351 } else if (needsValueFlag(c, flags)) {
3352 flags |= VALUE_CLASS;
3353 flags &= ~IDENTITY_TYPE;
3354 }
3355 flags &= ~ACC_IDENTITY; // ACC_IDENTITY and SYNCHRONIZED bits overloaded
3356 return flags;
3357 }
3358
3359 private boolean needsValueFlag(Symbol c, long flags) {
3360 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3361 if (allowValueClasses) {
3362 if (previewClassFile && majorVersion >= V67.major && (flags & INTERFACE) == 0 ||
3363 majorVersion >= V67.major && isMigratedValueClass(flags)) {
3364 return true;
3365 }
3366 }
3367 return false;
3368 }
3369
3370 private boolean isMigratedValueClass(long flags) {
3371 return allowValueClasses && ((flags & MIGRATED_VALUE_CLASS) != 0);
3372 }
3373
3374 /**
3375 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
3376 * The attribute is only the last component of the original filename, so is unlikely
3377 * to be valid as is, so operations other than those to access the name throw
3378 * UnsupportedOperationException
3379 */
3380 private static class SourceFileObject implements JavaFileObject {
3381
3382 /** The file's name.
3383 */
3384 private final Name name;
3385
3386 public SourceFileObject(Name name) {
3387 this.name = name;
3388 }
3389
3390 @Override @DefinedBy(Api.COMPILER)
3391 public URI toUri() {
3392 try {
3393 return new URI(null, name.toString(), null);
3394 } catch (URISyntaxException e) {
3395 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
3396 }
3397 }
3398
3399 @Override @DefinedBy(Api.COMPILER)
3400 public String getName() {
3401 return name.toString();
3402 }
3403
3404 @Override @DefinedBy(Api.COMPILER)
3405 public JavaFileObject.Kind getKind() {
3406 return BaseFileManager.getKind(getName());
3407 }
3408
3409 @Override @DefinedBy(Api.COMPILER)
3410 public InputStream openInputStream() {
3411 throw new UnsupportedOperationException();
3412 }
3413
3414 @Override @DefinedBy(Api.COMPILER)
3415 public OutputStream openOutputStream() {
3416 throw new UnsupportedOperationException();
3417 }
3418
3419 @Override @DefinedBy(Api.COMPILER)
3420 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
3421 throw new UnsupportedOperationException();
3422 }
3423
3424 @Override @DefinedBy(Api.COMPILER)
3425 public Reader openReader(boolean ignoreEncodingErrors) {
3426 throw new UnsupportedOperationException();
3427 }
3428
3429 @Override @DefinedBy(Api.COMPILER)
3430 public Writer openWriter() {
3431 throw new UnsupportedOperationException();
3432 }
3433
3434 @Override @DefinedBy(Api.COMPILER)
3435 public long getLastModified() {
3436 throw new UnsupportedOperationException();
3437 }
3438
3439 @Override @DefinedBy(Api.COMPILER)
3440 public boolean delete() {
3441 throw new UnsupportedOperationException();
3442 }
3443
3444 @Override @DefinedBy(Api.COMPILER)
3445 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
3446 return true; // fail-safe mode
3447 }
3448
3449 @Override @DefinedBy(Api.COMPILER)
3450 public NestingKind getNestingKind() {
3451 return null;
3452 }
3453
3454 @Override @DefinedBy(Api.COMPILER)
3455 public Modifier getAccessLevel() {
3456 return null;
3457 }
3458
3459 /**
3460 * Check if two file objects are equal.
3461 * SourceFileObjects are just placeholder objects for the value of a
3462 * SourceFile attribute, and do not directly represent specific files.
3463 * Two SourceFileObjects are equal if their names are equal.
3464 */
3465 @Override
3466 public boolean equals(Object other) {
3467 if (this == other)
3468 return true;
3469 return (other instanceof SourceFileObject sourceFileObject)
3470 && name.equals(sourceFileObject.name);
3471 }
3472
3473 @Override
3474 public int hashCode() {
3475 return name.hashCode();
3476 }
3477 }
3478
3479 private class CompleterDeproxy implements AnnotationTypeCompleter {
3480 ClassSymbol proxyOn;
3481 CompoundAnnotationProxy target;
3482 CompoundAnnotationProxy repeatable;
3483
3484 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
3485 CompoundAnnotationProxy repeatable)
3486 {
3487 this.proxyOn = c;
3488 this.target = target;
3489 this.repeatable = repeatable;
3490 }
3491
3492 @Override
3493 public void complete(ClassSymbol sym) {
3494 Assert.check(proxyOn == sym);
3495 Attribute.Compound theTarget = null, theRepeatable = null;
3496 AnnotationDeproxy deproxy;
3497
3498 try {
3499 if (target != null) {
3500 deproxy = new AnnotationDeproxy(proxyOn);
3501 theTarget = deproxy.deproxyCompound(target);
3502 }
3503
3504 if (repeatable != null) {
3505 deproxy = new AnnotationDeproxy(proxyOn);
3506 theRepeatable = deproxy.deproxyCompound(repeatable);
3507 }
3508 } catch (Exception e) {
3509 throw new CompletionFailure(sym,
3510 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())),
3511 dcfh);
3512 }
3513
3514 sym.getAnnotationTypeMetadata().setTarget(theTarget);
3515 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
3516 }
3517 }
3518
3519 private class ProxyType extends Type {
3520
3521 private final Name name;
3522
3523 public ProxyType(int index) {
3524 super(syms.noSymbol, List.nil());
3525 this.name = poolReader.getName(index);
3526 }
3527
3528 @Override
3529 public TypeTag getTag() {
3530 return TypeTag.NONE;
3531 }
3532
3533 public Type resolve() {
3534 return name.map(ClassReader.this::sigToType);
3535 }
3536
3537 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3538 public String toString() {
3539 return "<ProxyType>";
3540 }
3541
3542 }
3543
3544 private static final class InterimUsesDirective {
3545 public final Name service;
3546
3547 public InterimUsesDirective(Name service) {
3548 this.service = service;
3549 }
3550
3551 }
3552
3553 private static final class InterimProvidesDirective {
3554 public final Name service;
3555 public final List<Name> impls;
3556
3557 public InterimProvidesDirective(Name service, List<Name> impls) {
3558 this.service = service;
3559 this.impls = impls;
3560 }
3561
3562 }
3563
3564 private final class UsesProvidesCompleter implements Completer {
3565 private final ModuleSymbol currentModule;
3566 private final List<InterimUsesDirective> interimUsesCopy;
3567 private final List<InterimProvidesDirective> interimProvidesCopy;
3568
3569 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3570 this.currentModule = currentModule;
3571 this.interimUsesCopy = interimUsesCopy;
3572 this.interimProvidesCopy = interimProvidesCopy;
3573 }
3574
3575 @Override
3576 public void complete(Symbol sym) throws CompletionFailure {
3577 ListBuffer<Directive> directives = new ListBuffer<>();
3578 directives.addAll(currentModule.directives);
3579 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3580 for (InterimUsesDirective interim : interimUsesCopy) {
3581 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3582 uses.add(d);
3583 directives.add(d);
3584 }
3585 currentModule.uses = uses.toList();
3586 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3587 for (InterimProvidesDirective interim : interimProvidesCopy) {
3588 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3589 for (Name impl : interim.impls) {
3590 impls.append(syms.enterClass(currentModule, impl));
3591 }
3592 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3593 impls.toList());
3594 provides.add(d);
3595 directives.add(d);
3596 }
3597 currentModule.provides = provides.toList();
3598 currentModule.directives = directives.toList();
3599 }
3600 }
3601 }