1 /*
2 * Copyright (c) 1999, 2023, 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.BiFunction;
40 import java.util.function.IntFunction;
41 import java.util.function.Predicate;
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.Fragments;
67 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
68 import com.sun.tools.javac.tree.JCTree;
69 import com.sun.tools.javac.util.*;
70 import com.sun.tools.javac.util.ByteBuffer.UnderflowException;
71 import com.sun.tools.javac.util.DefinedBy.Api;
72 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
73 import com.sun.tools.javac.util.JCDiagnostic.Fragment;
74
75 import static com.sun.tools.javac.code.Flags.*;
76 import static com.sun.tools.javac.code.Kinds.Kind.*;
77
78 import com.sun.tools.javac.code.Scope.LookupKind;
79
80 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;
81 import static com.sun.tools.javac.code.TypeTag.ARRAY;
82 import static com.sun.tools.javac.code.TypeTag.CLASS;
83 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
84 import static com.sun.tools.javac.jvm.ClassFile.*;
85 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
86
87 import static com.sun.tools.javac.main.Option.PARAMETERS;
88
89 /** This class provides operations to read a classfile into an internal
90 * representation. The internal representation is anchored in a
91 * ClassSymbol which contains in its scope symbol representations
92 * for all other definitions in the classfile. Top-level Classes themselves
93 * appear as members of the scopes of PackageSymbols.
94 *
95 * <p><b>This is NOT part of any supported API.
96 * If you write code that depends on this, you do so at your own risk.
97 * This code and its internal interfaces are subject to change or
98 * deletion without notice.</b>
99 */
100 public class ClassReader {
101 /** The context key for the class reader. */
102 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
103
104 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
105
106 private final Annotate annotate;
107
108 /** Switch: verbose output.
109 */
110 boolean verbose;
111
112 /** Switch: allow modules.
113 */
114 boolean allowModules;
115
116 /** Switch: allow value classes.
117 */
118 boolean allowValueClasses;
119
120 /** Switch: allow sealed
121 */
122 boolean allowSealedTypes;
123
124 /** Switch: allow records
125 */
126 boolean allowRecords;
127
128 /** Lint option: warn about classfile issues
129 */
130 boolean lintClassfile;
131
132 /** Switch: warn (instead of error) on illegal UTF-8
133 */
134 boolean warnOnIllegalUtf8;
135
136 /** Switch: preserve parameter names from the variable table.
137 */
138 public boolean saveParameterNames;
139
140 /**
141 * The currently selected profile.
142 */
143 public final Profile profile;
144
145 /** The log to use for verbose output
146 */
147 final Log log;
148
149 /** The symbol table. */
150 Symtab syms;
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 /** UTF-8 validation level */
209 Convert.Validation utf8validation;
210
211 /** A table to hold the constant pool indices for method parameter
212 * names, as given in LocalVariableTable attributes.
213 */
214 int[] parameterNameIndicesLvt;
215
216 /**
217 * A table to hold the constant pool indices for method parameter
218 * names, as given in the MethodParameters attribute.
219 */
220 int[] parameterNameIndicesMp;
221
222 /**
223 * A table to hold the access flags of the method parameters.
224 */
225 int[] parameterAccessFlags;
226
227 /**
228 * A table to hold annotations for method parameters.
229 */
230 ParameterAnnotations[] parameterAnnotations;
231
232 /**
233 * A holder for parameter annotations.
234 */
235 static class ParameterAnnotations {
236 List<CompoundAnnotationProxy> proxies;
237
238 void add(List<CompoundAnnotationProxy> newAnnotations) {
239 if (proxies == null) {
240 proxies = newAnnotations;
241 } else {
242 proxies = proxies.prependList(newAnnotations);
243 }
244 }
245 }
246
247 /**
248 * The set of attribute names for which warnings have been generated for the current class
249 */
250 Set<Name> warnedAttrs = new HashSet<>();
251
252 /**
253 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
254 * {@code @Target}
255 */
256 CompoundAnnotationProxy target;
257
258 /**
259 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with
260 * {@code @Repeatable}
261 */
262 CompoundAnnotationProxy repeatable;
263
264 /** Get the ClassReader instance for this invocation. */
265 public static ClassReader instance(Context context) {
266 ClassReader instance = context.get(classReaderKey);
267 if (instance == null)
268 instance = new ClassReader(context);
269 return instance;
270 }
271
272 /** Construct a new class reader. */
273 @SuppressWarnings("this-escape")
274 protected ClassReader(Context context) {
275 context.put(classReaderKey, this);
276 annotate = Annotate.instance(context);
277 names = Names.instance(context);
278 syms = Symtab.instance(context);
279 types = Types.instance(context);
280 fileManager = context.get(JavaFileManager.class);
281 if (fileManager == null)
282 throw new AssertionError("FileManager initialization error");
283 diagFactory = JCDiagnostic.Factory.instance(context);
284 dcfh = DeferredCompletionFailureHandler.instance(context);
285
286 log = Log.instance(context);
287
288 Options options = Options.instance(context);
289 verbose = options.isSet(Option.VERBOSE);
290
291 Source source = Source.instance(context);
292 preview = Preview.instance(context);
293 allowModules = Feature.MODULES.allowedInSource(source);
294 allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) &&
295 Feature.VALUE_CLASSES.allowedInSource(source);
296 allowRecords = Feature.RECORDS.allowedInSource(source);
297 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source);
298 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source);
299
300 saveParameterNames = options.isSet(PARAMETERS);
301
302 profile = Profile.instance(context);
303
304 typevars = WriteableScope.create(syms.noSymbol);
305
306 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
307
308 initAttributeReaders();
309 }
310
311 /** Add member to class unless it is synthetic.
312 */
313 private void enterMember(ClassSymbol c, Symbol sym) {
314 // Synthetic members are not entered -- reason lost to history (optimization?).
315 // Lambda methods must be entered because they may have inner classes (which reference them)
316 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
317 c.members_field.enter(sym);
318 }
319
320 /************************************************************************
321 * Error Diagnoses
322 ***********************************************************************/
323
324 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
325 return badClassFile(diagFactory.fragment(key, args));
326 }
327
328 public ClassFinder.BadClassFile badClassFile(Fragment fragment) {
329 return badClassFile(diagFactory.fragment(fragment));
330 }
331
332 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) {
333 return new ClassFinder.BadClassFile (
334 currentOwner.enclClass(),
335 currentClassFile,
336 diagnostic,
337 diagFactory,
338 dcfh);
339 }
340
341 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) {
342 return new ClassFinder.BadEnclosingMethodAttr (
343 currentOwner.enclClass(),
344 currentClassFile,
345 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)),
346 diagFactory,
347 dcfh);
348 }
349
350 /************************************************************************
351 * Buffer Access
352 ***********************************************************************/
353
354 /** Read a character.
355 */
356 char nextChar() {
357 char res;
358 try {
359 res = buf.getChar(bp);
360 } catch (UnderflowException e) {
361 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
362 }
363 bp += 2;
364 return res;
365 }
366
367 /** Read a byte.
368 */
369 int nextByte() {
370 try {
371 return buf.getByte(bp++) & 0xFF;
372 } catch (UnderflowException e) {
373 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
374 }
375 }
376
377 /** Read an integer.
378 */
379 int nextInt() {
380 int res;
381 try {
382 res = buf.getInt(bp);
383 } catch (UnderflowException e) {
384 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
385 }
386 bp += 4;
387 return res;
388 }
389
390 /************************************************************************
391 * Constant Pool Access
392 ***********************************************************************/
393
394 /** Read module_flags.
395 */
396 Set<ModuleFlags> readModuleFlags(int flags) {
397 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
398 for (ModuleFlags f : ModuleFlags.values()) {
399 if ((flags & f.value) != 0)
400 set.add(f);
401 }
402 return set;
403 }
404
405 /** Read resolution_flags.
406 */
407 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
408 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
409 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
410 if ((flags & f.value) != 0)
411 set.add(f);
412 }
413 return set;
414 }
415
416 /** Read exports_flags.
417 */
418 Set<ExportsFlag> readExportsFlags(int flags) {
419 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
420 for (ExportsFlag f: ExportsFlag.values()) {
421 if ((flags & f.value) != 0)
422 set.add(f);
423 }
424 return set;
425 }
426
427 /** Read opens_flags.
428 */
429 Set<OpensFlag> readOpensFlags(int flags) {
430 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
431 for (OpensFlag f: OpensFlag.values()) {
432 if ((flags & f.value) != 0)
433 set.add(f);
434 }
435 return set;
436 }
437
438 /** Read requires_flags.
439 */
440 Set<RequiresFlag> readRequiresFlags(int flags) {
441 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
442 for (RequiresFlag f: RequiresFlag.values()) {
443 if ((flags & f.value) != 0)
444 set.add(f);
445 }
446 return set;
447 }
448
449 /************************************************************************
450 * Reading Types
451 ***********************************************************************/
452
453 /** The unread portion of the currently read type is
454 * signature[sigp..siglimit-1].
455 */
456 byte[] signature;
457 int sigp;
458 int siglimit;
459 boolean sigEnterPhase = false;
460
461 /** Convert signature to type, where signature is a byte array segment.
462 */
463 Type sigToType(byte[] sig, int offset, int len) {
464 signature = sig;
465 sigp = offset;
466 siglimit = offset + len;
467 return sigToType();
468 }
469
470 /** Convert signature to type, where signature is implicit.
471 */
472 Type sigToType() {
473 switch ((char) signature[sigp]) {
474 case 'T':
475 sigp++;
476 int start = sigp;
477 while (signature[sigp] != ';') sigp++;
478 sigp++;
479 return sigEnterPhase
480 ? Type.noType
481 : findTypeVar(readName(signature, start, sigp - 1 - start));
482 case '+': {
483 sigp++;
484 Type t = sigToType();
485 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
486 }
487 case '*':
488 sigp++;
489 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
490 syms.boundClass);
491 case '-': {
492 sigp++;
493 Type t = sigToType();
494 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
495 }
496 case 'B':
497 sigp++;
498 return syms.byteType;
499 case 'C':
500 sigp++;
501 return syms.charType;
502 case 'D':
503 sigp++;
504 return syms.doubleType;
505 case 'F':
506 sigp++;
507 return syms.floatType;
508 case 'I':
509 sigp++;
510 return syms.intType;
511 case 'J':
512 sigp++;
513 return syms.longType;
514 case 'L':
515 {
516 // int oldsigp = sigp;
517 Type t = classSigToType();
518 if (sigp < siglimit && signature[sigp] == '.')
519 throw badClassFile("deprecated inner class signature syntax " +
520 "(please recompile from source)");
521 /*
522 System.err.println(" decoded " +
523 new String(signature, oldsigp, sigp-oldsigp) +
524 " => " + t + " outer " + t.outer());
525 */
526 return t;
527 }
528 case 'S':
529 sigp++;
530 return syms.shortType;
531 case 'V':
532 sigp++;
533 return syms.voidType;
534 case 'Z':
535 sigp++;
536 return syms.booleanType;
537 case '[':
538 sigp++;
539 return new ArrayType(sigToType(), syms.arrayClass);
540 case '(':
541 sigp++;
542 List<Type> argtypes = sigToTypes(')');
543 Type restype = sigToType();
544 List<Type> thrown = List.nil();
545 while (sigp < siglimit && signature[sigp] == '^') {
546 sigp++;
547 thrown = thrown.prepend(sigToType());
548 }
549 // if there is a typevar in the throws clause we should state it.
550 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
551 if (l.head.hasTag(TYPEVAR)) {
552 l.head.tsym.flags_field |= THROWS;
553 }
554 }
555 return new MethodType(argtypes,
556 restype,
557 thrown.reverse(),
558 syms.methodClass);
559 case '<':
560 typevars = typevars.dup(currentOwner);
561 Type poly = new ForAll(sigToTypeParams(), sigToType());
562 typevars = typevars.leave();
563 return poly;
564 default:
565 throw badClassFile("bad.signature", quoteBadSignature());
566 }
567 }
568
569 byte[] signatureBuffer = new byte[0];
570 int sbp = 0;
571 /** Convert class signature to type, where signature is implicit.
572 */
573 Type classSigToType() {
574 if (signature[sigp] != 'L')
575 throw badClassFile("bad.class.signature", quoteBadSignature());
576 sigp++;
577 Type outer = Type.noType;
578 Name name;
579 int startSbp = sbp;
580
581 while (true) {
582 final byte c = signature[sigp++];
583 switch (c) {
584
585 case ';': { // end
586 ClassSymbol t = enterClass(readName(signatureBuffer,
587 startSbp,
588 sbp - startSbp));
589
590 try {
591 if (outer == Type.noType) {
592 ClassType et = (ClassType) t.erasure(types);
593 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata());
594 }
595 return new ClassType(outer, List.nil(), t, List.nil());
596 } finally {
597 sbp = startSbp;
598 }
599 }
600
601 case '<': // generic arguments
602 ClassSymbol t = enterClass(readName(signatureBuffer,
603 startSbp,
604 sbp - startSbp));
605 outer = new ClassType(outer, sigToTypes('>'), t, List.nil()) {
606 boolean completed = false;
607 @Override @DefinedBy(Api.LANGUAGE_MODEL)
608 public Type getEnclosingType() {
609 if (!completed) {
610 completed = true;
611 tsym.apiComplete();
612 Type enclosingType = tsym.type.getEnclosingType();
613 if (enclosingType != Type.noType) {
614 List<Type> typeArgs =
615 super.getEnclosingType().allparams();
616 List<Type> typeParams =
617 enclosingType.allparams();
618 if (typeParams.length() != typeArgs.length()) {
619 // no "rare" types
620 super.setEnclosingType(types.erasure(enclosingType));
621 } else {
622 super.setEnclosingType(types.subst(enclosingType,
623 typeParams,
624 typeArgs));
625 }
626 } else {
627 super.setEnclosingType(Type.noType);
628 }
629 }
630 return super.getEnclosingType();
631 }
632 @Override
633 public void setEnclosingType(Type outer) {
634 throw new UnsupportedOperationException();
635 }
636 };
637 switch (signature[sigp++]) {
638 case ';':
639 if (sigp < siglimit && signature[sigp] == '.') {
640 // support old-style GJC signatures
641 // The signature produced was
642 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
643 // rather than say
644 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
645 // so we skip past ".Lfoo/Outer$"
646 sigp += (sbp - startSbp) + // "foo/Outer"
647 3; // ".L" and "$"
648 signatureBuffer[sbp++] = (byte)'$';
649 break;
650 } else {
651 sbp = startSbp;
652 return outer;
653 }
654 case '.':
655 signatureBuffer[sbp++] = (byte)'$';
656 break;
657 default:
658 throw new AssertionError(signature[sigp-1]);
659 }
660 continue;
661
662 case '.':
663 //we have seen an enclosing non-generic class
664 if (outer != Type.noType) {
665 t = enterClass(readName(signatureBuffer,
666 startSbp,
667 sbp - startSbp));
668 outer = new ClassType(outer, List.nil(), t, List.nil());
669 }
670 signatureBuffer[sbp++] = (byte)'$';
671 continue;
672 case '/':
673 signatureBuffer[sbp++] = (byte)'.';
674 continue;
675 default:
676 signatureBuffer[sbp++] = c;
677 continue;
678 }
679 }
680 }
681
682 /** Quote a bogus signature for display inside an error message.
683 */
684 String quoteBadSignature() {
685 String sigString;
686 try {
687 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE);
688 } catch (InvalidUtfException e) {
689 throw new AssertionError(e);
690 }
691 if (sigString.length() > 32)
692 sigString = sigString.substring(0, 32) + "...";
693 return "\"" + sigString + "\"";
694 }
695
696 /** Convert (implicit) signature to list of types
697 * until `terminator' is encountered.
698 */
699 List<Type> sigToTypes(char terminator) {
700 List<Type> head = List.of(null);
701 List<Type> tail = head;
702 while (signature[sigp] != terminator)
703 tail = tail.setTail(List.of(sigToType()));
704 sigp++;
705 return head.tail;
706 }
707
708 /** Convert signature to type parameters, where signature is a byte
709 * array segment.
710 */
711 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
712 signature = sig;
713 sigp = offset;
714 siglimit = offset + len;
715 return sigToTypeParams();
716 }
717
718 /** Convert signature to type parameters, where signature is implicit.
719 */
720 List<Type> sigToTypeParams() {
721 List<Type> tvars = List.nil();
722 if (signature[sigp] == '<') {
723 sigp++;
724 int start = sigp;
725 sigEnterPhase = true;
726 while (signature[sigp] != '>')
727 tvars = tvars.prepend(sigToTypeParam());
728 sigEnterPhase = false;
729 sigp = start;
730 while (signature[sigp] != '>')
731 sigToTypeParam();
732 sigp++;
733 }
734 return tvars.reverse();
735 }
736
737 /** Convert (implicit) signature to type parameter.
738 */
739 Type sigToTypeParam() {
740 int start = sigp;
741 while (signature[sigp] != ':') sigp++;
742 Name name = readName(signature, start, sigp - start);
743 TypeVar tvar;
744 if (sigEnterPhase) {
745 tvar = new TypeVar(name, currentOwner, syms.botType);
746 typevars.enter(tvar.tsym);
747 } else {
748 tvar = (TypeVar)findTypeVar(name);
749 }
750 List<Type> bounds = List.nil();
751 boolean allInterfaces = false;
752 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
753 sigp++;
754 allInterfaces = true;
755 }
756 while (signature[sigp] == ':') {
757 sigp++;
758 bounds = bounds.prepend(sigToType());
759 }
760 if (!sigEnterPhase) {
761 types.setBounds(tvar, bounds.reverse(), allInterfaces);
762 }
763 return tvar;
764 }
765
766 /** Find type variable with given name in `typevars' scope.
767 */
768 Type findTypeVar(Name name) {
769 Symbol s = typevars.findFirst(name);
770 if (s != null) {
771 return s.type;
772 } else {
773 if (readingClassAttr) {
774 // While reading the class attribute, the supertypes
775 // might refer to a type variable from an enclosing element
776 // (method or class).
777 // If the type variable is defined in the enclosing class,
778 // we can actually find it in
779 // currentOwner.owner.type.getTypeArguments()
780 // However, until we have read the enclosing method attribute
781 // we don't know for sure if this owner is correct. It could
782 // be a method and there is no way to tell before reading the
783 // enclosing method attribute.
784 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
785 missingTypeVariables = missingTypeVariables.prepend(t);
786 // System.err.println("Missing type var " + name);
787 return t;
788 }
789 throw badClassFile("undecl.type.var", name);
790 }
791 }
792
793 private Name readName(byte[] buf, int off, int len) {
794 try {
795 return names.fromUtf(buf, off, len, utf8validation);
796 } catch (InvalidUtfException e) {
797 if (warnOnIllegalUtf8) {
798 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
799 Fragments.BadUtf8ByteSequenceAt(sigp)));
800 return names.fromUtfLax(buf, off, len);
801 }
802 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp));
803 }
804 }
805
806 /************************************************************************
807 * Reading Attributes
808 ***********************************************************************/
809
810 protected enum AttributeKind { CLASS, MEMBER }
811
812 protected abstract class AttributeReader {
813 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
814 this.name = name;
815 this.version = version;
816 this.kinds = kinds;
817 }
818
819 protected boolean accepts(AttributeKind kind) {
820 if (kinds.contains(kind)) {
821 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
822 return true;
823
824 if (lintClassfile && !warnedAttrs.contains(name)) {
825 JavaFileObject prev = log.useSource(currentClassFile);
826 try {
827 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null,
828 Warnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion));
829 } finally {
830 log.useSource(prev);
831 }
832 warnedAttrs.add(name);
833 }
834 }
835 return false;
836 }
837
838 protected abstract void read(Symbol sym, int attrLen);
839
840 protected final Name name;
841 protected final ClassFile.Version version;
842 protected final Set<AttributeKind> kinds;
843 }
844
845 protected Set<AttributeKind> CLASS_ATTRIBUTE =
846 EnumSet.of(AttributeKind.CLASS);
847 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
848 EnumSet.of(AttributeKind.MEMBER);
849 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
850 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
851
852 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
853
854 private void initAttributeReaders() {
855 AttributeReader[] readers = {
856 // v45.3 attributes
857
858 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
859 protected void read(Symbol sym, int attrLen) {
860 if (saveParameterNames)
861 ((MethodSymbol)sym).code = readCode(sym);
862 else
863 bp = bp + attrLen;
864 }
865 },
866
867 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
868 protected void read(Symbol sym, int attrLen) {
869 Object v = poolReader.getConstant(nextChar());
870 // Ignore ConstantValue attribute if field not final.
871 if ((sym.flags() & FINAL) == 0) {
872 return;
873 }
874 VarSymbol var = (VarSymbol) sym;
875 switch (var.type.getTag()) {
876 case BOOLEAN:
877 case BYTE:
878 case CHAR:
879 case SHORT:
880 case INT:
881 checkType(var, Integer.class, v);
882 break;
883 case LONG:
884 checkType(var, Long.class, v);
885 break;
886 case FLOAT:
887 checkType(var, Float.class, v);
888 break;
889 case DOUBLE:
890 checkType(var, Double.class, v);
891 break;
892 case CLASS:
893 if (var.type.tsym == syms.stringType.tsym) {
894 checkType(var, String.class, v);
895 } else {
896 throw badClassFile("bad.constant.value.type", var.type);
897 }
898 break;
899 default:
900 // ignore ConstantValue attribute if type is not primitive or String
901 return;
902 }
903 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) {
904 throw badClassFile("bad.constant.range", v, var, var.type);
905 }
906 var.setData(v);
907 }
908
909 void checkType(Symbol var, Class<?> clazz, Object value) {
910 if (!clazz.isInstance(value)) {
911 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName());
912 }
913 }
914 },
915
916 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
917 protected void read(Symbol sym, int attrLen) {
918 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
919
920 s.flags_field |= DEPRECATED;
921 }
922 },
923
924 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
925 protected void read(Symbol sym, int attrLen) {
926 int nexceptions = nextChar();
927 List<Type> thrown = List.nil();
928 for (int j = 0; j < nexceptions; j++)
929 thrown = thrown.prepend(poolReader.getClass(nextChar()).type);
930 if (sym.type.getThrownTypes().isEmpty())
931 sym.type.asMethodType().thrown = thrown.reverse();
932 }
933 },
934
935 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
936 protected void read(Symbol sym, int attrLen) {
937 ClassSymbol c = (ClassSymbol) sym;
938 if (currentModule.module_info == c) {
939 //prevent entering the classes too soon:
940 skipInnerClasses();
941 } else {
942 readInnerClasses(c);
943 }
944 }
945 },
946
947 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
948 protected void read(Symbol sym, int attrLen) {
949 int newbp = bp + attrLen;
950 if (saveParameterNames) {
951 // Pick up parameter names from the variable table.
952 // Parameter names are not explicitly identified as such,
953 // but all parameter name entries in the LocalVariableTable
954 // have a start_pc of 0. Therefore, we record the name
955 // indices of all slots with a start_pc of zero in the
956 // parameterNameIndices array.
957 // Note that this implicitly honors the JVMS spec that
958 // there may be more than one LocalVariableTable, and that
959 // there is no specified ordering for the entries.
960 int numEntries = nextChar();
961 for (int i = 0; i < numEntries; i++) {
962 int start_pc = nextChar();
963 int length = nextChar();
964 int nameIndex = nextChar();
965 int sigIndex = nextChar();
966 int register = nextChar();
967 if (start_pc == 0) {
968 // ensure array large enough
969 if (register >= parameterNameIndicesLvt.length) {
970 int newSize =
971 Math.max(register + 1, parameterNameIndicesLvt.length + 8);
972 parameterNameIndicesLvt =
973 Arrays.copyOf(parameterNameIndicesLvt, newSize);
974 }
975 parameterNameIndicesLvt[register] = nameIndex;
976 }
977 }
978 }
979 bp = newbp;
980 }
981 },
982
983 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
984 protected void read(Symbol sym, int attrLen) {
985 ClassSymbol c = (ClassSymbol) sym;
986 Name n = poolReader.getName(nextChar());
987 c.sourcefile = new SourceFileObject(n);
988 // If the class is a toplevel class, originating from a Java source file,
989 // but the class name does not match the file name, then it is
990 // an auxiliary class.
991 String sn = n.toString();
992 if (c.owner.kind == PCK &&
993 sn.endsWith(".java") &&
994 !sn.equals(c.name.toString()+".java")) {
995 c.flags_field |= AUXILIARY;
996 }
997 }
998 },
999
1000 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1001 protected void read(Symbol sym, int attrLen) {
1002 sym.flags_field |= SYNTHETIC;
1003 }
1004 },
1005
1006 // standard v49 attributes
1007
1008 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1009 protected void read(Symbol sym, int attrLen) {
1010 int newbp = bp + attrLen;
1011 readEnclosingMethodAttr(sym);
1012 bp = newbp;
1013 }
1014 },
1015
1016 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1017 protected void read(Symbol sym, int attrLen) {
1018 if (sym.kind == TYP) {
1019 ClassSymbol c = (ClassSymbol) sym;
1020 readingClassAttr = true;
1021 try {
1022 ClassType ct1 = (ClassType)c.type;
1023 Assert.check(c == currentOwner);
1024 ct1.typarams_field = poolReader.getName(nextChar())
1025 .map(ClassReader.this::sigToTypeParams);
1026 ct1.supertype_field = sigToType();
1027 ListBuffer<Type> is = new ListBuffer<>();
1028 while (sigp != siglimit) is.append(sigToType());
1029 ct1.interfaces_field = is.toList();
1030 } finally {
1031 readingClassAttr = false;
1032 }
1033 } else {
1034 List<Type> thrown = sym.type.getThrownTypes();
1035 sym.type = poolReader.getType(nextChar());
1036 //- System.err.println(" # " + sym.type);
1037 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1038 sym.type.asMethodType().thrown = thrown;
1039
1040 }
1041 }
1042 },
1043
1044 // v49 annotation attributes
1045
1046 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1047 protected void read(Symbol sym, int attrLen) {
1048 attachAnnotationDefault(sym);
1049 }
1050 },
1051
1052 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1053 protected void read(Symbol sym, int attrLen) {
1054 attachAnnotations(sym);
1055 }
1056 },
1057
1058 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1059 protected void read(Symbol sym, int attrLen) {
1060 readParameterAnnotations(sym);
1061 }
1062 },
1063
1064 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1065 protected void read(Symbol sym, int attrLen) {
1066 attachAnnotations(sym);
1067 }
1068 },
1069
1070 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1071 protected void read(Symbol sym, int attrLen) {
1072 readParameterAnnotations(sym);
1073 }
1074 },
1075
1076 // additional "legacy" v49 attributes, superseded by flags
1077
1078 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1079 protected void read(Symbol sym, int attrLen) {
1080 sym.flags_field |= ANNOTATION;
1081 }
1082 },
1083
1084 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1085 protected void read(Symbol sym, int attrLen) {
1086 sym.flags_field |= BRIDGE;
1087 }
1088 },
1089
1090 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1091 protected void read(Symbol sym, int attrLen) {
1092 sym.flags_field |= ENUM;
1093 }
1094 },
1095
1096 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1097 protected void read(Symbol sym, int attrLen) {
1098 sym.flags_field |= VARARGS;
1099 }
1100 },
1101
1102 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1103 protected void read(Symbol sym, int attrLen) {
1104 attachTypeAnnotations(sym);
1105 }
1106 },
1107
1108 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1109 protected void read(Symbol sym, int attrLen) {
1110 attachTypeAnnotations(sym);
1111 }
1112 },
1113
1114 // The following attributes for a Code attribute are not currently handled
1115 // StackMapTable
1116 // SourceDebugExtension
1117 // LineNumberTable
1118 // LocalVariableTypeTable
1119
1120 // standard v52 attributes
1121
1122 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1123 protected void read(Symbol sym, int attrlen) {
1124 int newbp = bp + attrlen;
1125 if (saveParameterNames) {
1126 int numEntries = nextByte();
1127 parameterNameIndicesMp = new int[numEntries];
1128 parameterAccessFlags = new int[numEntries];
1129 int index = 0;
1130 for (int i = 0; i < numEntries; i++) {
1131 int nameIndex = nextChar();
1132 int flags = nextChar();
1133 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) {
1134 continue;
1135 }
1136 parameterNameIndicesMp[index] = nameIndex;
1137 parameterAccessFlags[index] = flags;
1138 index++;
1139 }
1140 }
1141 bp = newbp;
1142 }
1143 },
1144
1145 // standard v53 attributes
1146
1147 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1148 @Override
1149 protected boolean accepts(AttributeKind kind) {
1150 return super.accepts(kind) && allowModules;
1151 }
1152 protected void read(Symbol sym, int attrLen) {
1153 if (sym.kind == TYP && sym.owner.kind == MDL) {
1154 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1155 ListBuffer<Directive> directives = new ListBuffer<>();
1156
1157 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName);
1158 if (currentModule.name != moduleName) {
1159 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1160 }
1161
1162 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar());
1163 msym.flags.addAll(moduleFlags);
1164 msym.version = optPoolEntry(nextChar(), poolReader::getName, null);
1165
1166 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1167 int nrequires = nextChar();
1168 for (int i = 0; i < nrequires; i++) {
1169 ModuleSymbol rsym = poolReader.getModule(nextChar());
1170 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1171 if (rsym == syms.java_base && majorVersion >= V54.major) {
1172 if (flags.contains(RequiresFlag.TRANSITIVE)) {
1173 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE);
1174 }
1175 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1176 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1177 }
1178 }
1179 nextChar(); // skip compiled version
1180 requires.add(new RequiresDirective(rsym, flags));
1181 }
1182 msym.requires = requires.toList();
1183 directives.addAll(msym.requires);
1184
1185 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1186 int nexports = nextChar();
1187 for (int i = 0; i < nexports; i++) {
1188 PackageSymbol p = poolReader.getPackage(nextChar());
1189 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1190 int nto = nextChar();
1191 List<ModuleSymbol> to;
1192 if (nto == 0) {
1193 to = null;
1194 } else {
1195 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1196 for (int t = 0; t < nto; t++)
1197 lb.append(poolReader.getModule(nextChar()));
1198 to = lb.toList();
1199 }
1200 exports.add(new ExportsDirective(p, to, flags));
1201 }
1202 msym.exports = exports.toList();
1203 directives.addAll(msym.exports);
1204 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1205 int nopens = nextChar();
1206 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1207 throw badClassFile("module.non.zero.opens", currentModule.name);
1208 }
1209 for (int i = 0; i < nopens; i++) {
1210 PackageSymbol p = poolReader.getPackage(nextChar());
1211 Set<OpensFlag> flags = readOpensFlags(nextChar());
1212 int nto = nextChar();
1213 List<ModuleSymbol> to;
1214 if (nto == 0) {
1215 to = null;
1216 } else {
1217 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1218 for (int t = 0; t < nto; t++)
1219 lb.append(poolReader.getModule(nextChar()));
1220 to = lb.toList();
1221 }
1222 opens.add(new OpensDirective(p, to, flags));
1223 }
1224 msym.opens = opens.toList();
1225 directives.addAll(msym.opens);
1226
1227 msym.directives = directives.toList();
1228
1229 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1230 int nuses = nextChar();
1231 for (int i = 0; i < nuses; i++) {
1232 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1233 uses.add(new InterimUsesDirective(srvc));
1234 }
1235 interimUses = uses.toList();
1236
1237 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1238 int nprovides = nextChar();
1239 for (int p = 0; p < nprovides; p++) {
1240 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1241 int nimpls = nextChar();
1242 ListBuffer<Name> impls = new ListBuffer<>();
1243 for (int i = 0; i < nimpls; i++) {
1244 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper));
1245 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1246 }
1247 }
1248 interimProvides = provides.toList();
1249 }
1250 }
1251
1252 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException {
1253 byte[] buf = ClassFile.internalize(arr, offset, length);
1254 try {
1255 return names.fromUtf(buf, 0, buf.length, utf8validation);
1256 } catch (InvalidUtfException e) {
1257 if (warnOnIllegalUtf8) {
1258 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
1259 Fragments.BadUtf8ByteSequenceAt(e.getOffset())));
1260 return names.fromUtfLax(buf, 0, buf.length);
1261 }
1262 throw e;
1263 }
1264 }
1265 },
1266
1267 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1268 @Override
1269 protected boolean accepts(AttributeKind kind) {
1270 return super.accepts(kind) && allowModules;
1271 }
1272 protected void read(Symbol sym, int attrLen) {
1273 if (sym.kind == TYP && sym.owner.kind == MDL) {
1274 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1275 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1276 }
1277 }
1278 },
1279
1280 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) {
1281 @Override
1282 protected boolean accepts(AttributeKind kind) {
1283 return super.accepts(kind) && allowRecords;
1284 }
1285 protected void read(Symbol sym, int attrLen) {
1286 if (sym.kind == TYP) {
1287 sym.flags_field |= RECORD;
1288 }
1289 int componentCount = nextChar();
1290 ListBuffer<RecordComponent> components = new ListBuffer<>();
1291 for (int i = 0; i < componentCount; i++) {
1292 Name name = poolReader.getName(nextChar());
1293 Type type = poolReader.getType(nextChar());
1294 RecordComponent c = new RecordComponent(name, type, sym);
1295 readAttrs(c, AttributeKind.MEMBER);
1296 components.add(c);
1297 }
1298 ((ClassSymbol) sym).setRecordComponents(components.toList());
1299 }
1300 },
1301 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) {
1302 @Override
1303 protected boolean accepts(AttributeKind kind) {
1304 return super.accepts(kind) && allowSealedTypes;
1305 }
1306 protected void read(Symbol sym, int attrLen) {
1307 if (sym.kind == TYP) {
1308 ListBuffer<Symbol> subtypes = new ListBuffer<>();
1309 int numberOfPermittedSubtypes = nextChar();
1310 for (int i = 0; i < numberOfPermittedSubtypes; i++) {
1311 subtypes.add(poolReader.getClass(nextChar()));
1312 }
1313 ((ClassSymbol)sym).permitted = subtypes.toList();
1314 }
1315 }
1316 },
1317 };
1318
1319 for (AttributeReader r: readers)
1320 attributeReaders.put(r.name, r);
1321 }
1322
1323 protected void readEnclosingMethodAttr(Symbol sym) {
1324 // sym is a nested class with an "Enclosing Method" attribute
1325 // remove sym from it's current owners scope and place it in
1326 // the scope specified by the attribute
1327 sym.owner.members().remove(sym);
1328 ClassSymbol self = (ClassSymbol)sym;
1329 ClassSymbol c = poolReader.getClass(nextChar());
1330 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null);
1331
1332 if (c.members_field == null || c.kind != TYP)
1333 throw badClassFile("bad.enclosing.class", self, c);
1334
1335 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1336 if (nt != null && m == null)
1337 throw badEnclosingMethod(self);
1338
1339 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1340 self.owner = m != null ? m : c;
1341 if (self.name.isEmpty())
1342 self.fullname = names.empty;
1343 else
1344 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1345
1346 if (m != null) {
1347 ((ClassType)sym.type).setEnclosingType(m.type);
1348 } else if ((self.flags_field & STATIC) == 0) {
1349 ((ClassType)sym.type).setEnclosingType(c.type);
1350 } else {
1351 ((ClassType)sym.type).setEnclosingType(Type.noType);
1352 }
1353 enterTypevars(self, self.type);
1354 if (!missingTypeVariables.isEmpty()) {
1355 ListBuffer<Type> typeVars = new ListBuffer<>();
1356 for (Type typevar : missingTypeVariables) {
1357 typeVars.append(findTypeVar(typevar.tsym.name));
1358 }
1359 foundTypeVariables = typeVars.toList();
1360 } else {
1361 foundTypeVariables = List.nil();
1362 }
1363 }
1364
1365 // See java.lang.Class
1366 private Name simpleBinaryName(Name self, Name enclosing) {
1367 if (!self.startsWith(enclosing)) {
1368 throw badClassFile("bad.enclosing.method", self);
1369 }
1370
1371 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1372 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1373 throw badClassFile("bad.enclosing.method", self);
1374 int index = 1;
1375 while (index < simpleBinaryName.length() &&
1376 isAsciiDigit(simpleBinaryName.charAt(index)))
1377 index++;
1378 return names.fromString(simpleBinaryName.substring(index));
1379 }
1380
1381 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1382 if (nt == null)
1383 return null;
1384
1385 MethodType type = nt.type.asMethodType();
1386
1387 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1388 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1389 return (MethodSymbol)sym;
1390 }
1391
1392 if (nt.name != names.init)
1393 // not a constructor
1394 return null;
1395 if ((flags & INTERFACE) != 0)
1396 // no enclosing instance
1397 return null;
1398 if (nt.type.getParameterTypes().isEmpty())
1399 // no parameters
1400 return null;
1401
1402 // A constructor of an inner class.
1403 // Remove the first argument (the enclosing instance)
1404 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail,
1405 nt.type.getReturnType(),
1406 nt.type.getThrownTypes(),
1407 syms.methodClass));
1408 // Try searching again
1409 return findMethod(nt, scope, flags);
1410 }
1411
1412 /** Similar to Types.isSameType but avoids completion */
1413 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1414 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1415 .prepend(types.erasure(mt1.getReturnType()));
1416 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1417 while (!types1.isEmpty() && !types2.isEmpty()) {
1418 if (types1.head.tsym != types2.head.tsym)
1419 return false;
1420 types1 = types1.tail;
1421 types2 = types2.tail;
1422 }
1423 return types1.isEmpty() && types2.isEmpty();
1424 }
1425
1426 /**
1427 * Character.isDigit answers <tt>true</tt> to some non-ascii
1428 * digits. This one does not. <b>copied from java.lang.Class</b>
1429 */
1430 private static boolean isAsciiDigit(char c) {
1431 return '0' <= c && c <= '9';
1432 }
1433
1434 /** Read member attributes.
1435 */
1436 void readMemberAttrs(Symbol sym) {
1437 readAttrs(sym, AttributeKind.MEMBER);
1438 }
1439
1440 void readAttrs(Symbol sym, AttributeKind kind) {
1441 char ac = nextChar();
1442 for (int i = 0; i < ac; i++) {
1443 Name attrName = poolReader.getName(nextChar());
1444 int attrLen = nextInt();
1445 AttributeReader r = attributeReaders.get(attrName);
1446 if (r != null && r.accepts(kind))
1447 r.read(sym, attrLen);
1448 else {
1449 bp = bp + attrLen;
1450 }
1451 }
1452 }
1453
1454 private boolean readingClassAttr = false;
1455 private List<Type> missingTypeVariables = List.nil();
1456 private List<Type> foundTypeVariables = List.nil();
1457
1458 /** Read class attributes.
1459 */
1460 void readClassAttrs(ClassSymbol c) {
1461 readAttrs(c, AttributeKind.CLASS);
1462 }
1463
1464 /** Read code block.
1465 */
1466 Code readCode(Symbol owner) {
1467 nextChar(); // max_stack
1468 nextChar(); // max_locals
1469 final int code_length = nextInt();
1470 bp += code_length;
1471 final char exception_table_length = nextChar();
1472 bp += exception_table_length * 8;
1473 readMemberAttrs(owner);
1474 return null;
1475 }
1476
1477 /************************************************************************
1478 * Reading Java-language annotations
1479 ***********************************************************************/
1480
1481 /**
1482 * Save annotations.
1483 */
1484 List<CompoundAnnotationProxy> readAnnotations() {
1485 int numAttributes = nextChar();
1486 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1487 for (int i = 0; i < numAttributes; i++) {
1488 annotations.append(readCompoundAnnotation());
1489 }
1490 return annotations.toList();
1491 }
1492
1493 /** Attach annotations.
1494 */
1495 void attachAnnotations(final Symbol sym) {
1496 attachAnnotations(sym, readAnnotations());
1497 }
1498
1499 /**
1500 * Attach annotations.
1501 */
1502 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1503 if (annotations.isEmpty()) {
1504 return;
1505 }
1506 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1507 for (CompoundAnnotationProxy proxy : annotations) {
1508 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName())
1509 sym.flags_field |= PROPRIETARY;
1510 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) {
1511 if (profile != Profile.DEFAULT) {
1512 for (Pair<Name, Attribute> v : proxy.values) {
1513 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) {
1514 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) {
1515 sym.flags_field |= NOT_IN_PROFILE;
1516 }
1517 }
1518 }
1519 }
1520 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) {
1521 sym.flags_field |= PREVIEW_API;
1522 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1523 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) {
1524 Assert.check(sym.kind == TYP);
1525 sym.flags_field |= VALUE_BASED;
1526 } else if (proxy.type.tsym.flatName() == syms.restrictedType.tsym.flatName()) {
1527 Assert.check(sym.kind == MTH);
1528 sym.flags_field |= RESTRICTED;
1529 } else {
1530 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1531 target = proxy;
1532 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1533 repeatable = proxy;
1534 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1535 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1536 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL);
1537 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) {
1538 sym.flags_field |= PREVIEW_API;
1539 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1540 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) {
1541 sym.flags_field |= VALUE_BASED;
1542 } else if (proxy.type.tsym == syms.restrictedType.tsym) {
1543 Assert.check(sym.kind == MTH);
1544 sym.flags_field |= RESTRICTED;
1545 }
1546 proxies.append(proxy);
1547 }
1548 }
1549 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1550 }
1551 //where:
1552 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) {
1553 for (Pair<Name, Attribute> v : proxy.values) {
1554 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) {
1555 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
1556 sym.flags_field |= flag;
1557 }
1558 }
1559 }
1560 }
1561
1562 /** Read parameter annotations.
1563 */
1564 void readParameterAnnotations(Symbol meth) {
1565 int numParameters;
1566 try {
1567 numParameters = buf.getByte(bp++) & 0xFF;
1568 } catch (UnderflowException e) {
1569 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1570 }
1571 if (parameterAnnotations == null) {
1572 parameterAnnotations = new ParameterAnnotations[numParameters];
1573 } else if (parameterAnnotations.length != numParameters) {
1574 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1575 }
1576 for (int pnum = 0; pnum < numParameters; pnum++) {
1577 if (parameterAnnotations[pnum] == null) {
1578 parameterAnnotations[pnum] = new ParameterAnnotations();
1579 }
1580 parameterAnnotations[pnum].add(readAnnotations());
1581 }
1582 }
1583
1584 void attachTypeAnnotations(final Symbol sym) {
1585 int numAttributes = nextChar();
1586 if (numAttributes != 0) {
1587 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1588 for (int i = 0; i < numAttributes; i++)
1589 proxies.append(readTypeAnnotation());
1590 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1591 }
1592 }
1593
1594 /** Attach the default value for an annotation element.
1595 */
1596 void attachAnnotationDefault(final Symbol sym) {
1597 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1598 final Attribute value = readAttributeValue();
1599
1600 // The default value is set later during annotation. It might
1601 // be the case that the Symbol sym is annotated _after_ the
1602 // repeating instances that depend on this default value,
1603 // because of this we set an interim value that tells us this
1604 // element (most likely) has a default.
1605 //
1606 // Set interim value for now, reset just before we do this
1607 // properly at annotate time.
1608 meth.defaultValue = value;
1609 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1610 }
1611
1612 Type readTypeOrClassSymbol(int i) {
1613 return readTypeToProxy(i);
1614 }
1615 Type readTypeToProxy(int i) {
1616 if (currentModule.module_info == currentOwner) {
1617 return new ProxyType(i);
1618 } else {
1619 return poolReader.getType(i);
1620 }
1621 }
1622
1623 CompoundAnnotationProxy readCompoundAnnotation() {
1624 Type t;
1625 if (currentModule.module_info == currentOwner) {
1626 int cpIndex = nextChar();
1627 t = new ProxyType(cpIndex);
1628 } else {
1629 t = readTypeOrClassSymbol(nextChar());
1630 }
1631 int numFields = nextChar();
1632 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1633 for (int i=0; i<numFields; i++) {
1634 Name name = poolReader.getName(nextChar());
1635 Attribute value = readAttributeValue();
1636 pairs.append(new Pair<>(name, value));
1637 }
1638 return new CompoundAnnotationProxy(t, pairs.toList());
1639 }
1640
1641 TypeAnnotationProxy readTypeAnnotation() {
1642 TypeAnnotationPosition position = readPosition();
1643 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1644
1645 return new TypeAnnotationProxy(proxy, position);
1646 }
1647
1648 TypeAnnotationPosition readPosition() {
1649 int tag = nextByte(); // TargetType tag is a byte
1650
1651 if (!TargetType.isValidTargetTypeValue(tag))
1652 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1653
1654 TargetType type = TargetType.fromTargetTypeValue(tag);
1655
1656 switch (type) {
1657 // instanceof
1658 case INSTANCEOF: {
1659 final int offset = nextChar();
1660 final TypeAnnotationPosition position =
1661 TypeAnnotationPosition.instanceOf(readTypePath());
1662 position.offset = offset;
1663 return position;
1664 }
1665 // new expression
1666 case NEW: {
1667 final int offset = nextChar();
1668 final TypeAnnotationPosition position =
1669 TypeAnnotationPosition.newObj(readTypePath());
1670 position.offset = offset;
1671 return position;
1672 }
1673 // constructor/method reference receiver
1674 case CONSTRUCTOR_REFERENCE: {
1675 final int offset = nextChar();
1676 final TypeAnnotationPosition position =
1677 TypeAnnotationPosition.constructorRef(readTypePath());
1678 position.offset = offset;
1679 return position;
1680 }
1681 case METHOD_REFERENCE: {
1682 final int offset = nextChar();
1683 final TypeAnnotationPosition position =
1684 TypeAnnotationPosition.methodRef(readTypePath());
1685 position.offset = offset;
1686 return position;
1687 }
1688 // local variable
1689 case LOCAL_VARIABLE: {
1690 final int table_length = nextChar();
1691 final int[] newLvarOffset = new int[table_length];
1692 final int[] newLvarLength = new int[table_length];
1693 final int[] newLvarIndex = new int[table_length];
1694
1695 for (int i = 0; i < table_length; ++i) {
1696 newLvarOffset[i] = nextChar();
1697 newLvarLength[i] = nextChar();
1698 newLvarIndex[i] = nextChar();
1699 }
1700
1701 final TypeAnnotationPosition position =
1702 TypeAnnotationPosition.localVariable(readTypePath());
1703 position.lvarOffset = newLvarOffset;
1704 position.lvarLength = newLvarLength;
1705 position.lvarIndex = newLvarIndex;
1706 return position;
1707 }
1708 // resource variable
1709 case RESOURCE_VARIABLE: {
1710 final int table_length = nextChar();
1711 final int[] newLvarOffset = new int[table_length];
1712 final int[] newLvarLength = new int[table_length];
1713 final int[] newLvarIndex = new int[table_length];
1714
1715 for (int i = 0; i < table_length; ++i) {
1716 newLvarOffset[i] = nextChar();
1717 newLvarLength[i] = nextChar();
1718 newLvarIndex[i] = nextChar();
1719 }
1720
1721 final TypeAnnotationPosition position =
1722 TypeAnnotationPosition.resourceVariable(readTypePath());
1723 position.lvarOffset = newLvarOffset;
1724 position.lvarLength = newLvarLength;
1725 position.lvarIndex = newLvarIndex;
1726 return position;
1727 }
1728 // exception parameter
1729 case EXCEPTION_PARAMETER: {
1730 final int exception_index = nextChar();
1731 final TypeAnnotationPosition position =
1732 TypeAnnotationPosition.exceptionParameter(readTypePath());
1733 position.setExceptionIndex(exception_index);
1734 return position;
1735 }
1736 // method receiver
1737 case METHOD_RECEIVER:
1738 return TypeAnnotationPosition.methodReceiver(readTypePath());
1739 // type parameter
1740 case CLASS_TYPE_PARAMETER: {
1741 final int parameter_index = nextByte();
1742 return TypeAnnotationPosition
1743 .typeParameter(readTypePath(), parameter_index);
1744 }
1745 case METHOD_TYPE_PARAMETER: {
1746 final int parameter_index = nextByte();
1747 return TypeAnnotationPosition
1748 .methodTypeParameter(readTypePath(), parameter_index);
1749 }
1750 // type parameter bound
1751 case CLASS_TYPE_PARAMETER_BOUND: {
1752 final int parameter_index = nextByte();
1753 final int bound_index = nextByte();
1754 return TypeAnnotationPosition
1755 .typeParameterBound(readTypePath(), parameter_index,
1756 bound_index);
1757 }
1758 case METHOD_TYPE_PARAMETER_BOUND: {
1759 final int parameter_index = nextByte();
1760 final int bound_index = nextByte();
1761 return TypeAnnotationPosition
1762 .methodTypeParameterBound(readTypePath(), parameter_index,
1763 bound_index);
1764 }
1765 // class extends or implements clause
1766 case CLASS_EXTENDS: {
1767 final int type_index = nextChar();
1768 return TypeAnnotationPosition.classExtends(readTypePath(),
1769 type_index);
1770 }
1771 // throws
1772 case THROWS: {
1773 final int type_index = nextChar();
1774 return TypeAnnotationPosition.methodThrows(readTypePath(),
1775 type_index);
1776 }
1777 // method parameter
1778 case METHOD_FORMAL_PARAMETER: {
1779 final int parameter_index = nextByte();
1780 return TypeAnnotationPosition.methodParameter(readTypePath(),
1781 parameter_index);
1782 }
1783 // type cast
1784 case CAST: {
1785 final int offset = nextChar();
1786 final int type_index = nextByte();
1787 final TypeAnnotationPosition position =
1788 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1789 position.offset = offset;
1790 return position;
1791 }
1792 // method/constructor/reference type argument
1793 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1794 final int offset = nextChar();
1795 final int type_index = nextByte();
1796 final TypeAnnotationPosition position = TypeAnnotationPosition
1797 .constructorInvocationTypeArg(readTypePath(), type_index);
1798 position.offset = offset;
1799 return position;
1800 }
1801 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1802 final int offset = nextChar();
1803 final int type_index = nextByte();
1804 final TypeAnnotationPosition position = TypeAnnotationPosition
1805 .methodInvocationTypeArg(readTypePath(), type_index);
1806 position.offset = offset;
1807 return position;
1808 }
1809 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1810 final int offset = nextChar();
1811 final int type_index = nextByte();
1812 final TypeAnnotationPosition position = TypeAnnotationPosition
1813 .constructorRefTypeArg(readTypePath(), type_index);
1814 position.offset = offset;
1815 return position;
1816 }
1817 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1818 final int offset = nextChar();
1819 final int type_index = nextByte();
1820 final TypeAnnotationPosition position = TypeAnnotationPosition
1821 .methodRefTypeArg(readTypePath(), type_index);
1822 position.offset = offset;
1823 return position;
1824 }
1825 // We don't need to worry about these
1826 case METHOD_RETURN:
1827 return TypeAnnotationPosition.methodReturn(readTypePath());
1828 case FIELD:
1829 return TypeAnnotationPosition.field(readTypePath());
1830 case UNKNOWN:
1831 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1832 default:
1833 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1834 }
1835 }
1836
1837 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1838 int len = nextByte();
1839 ListBuffer<Integer> loc = new ListBuffer<>();
1840 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1841 loc = loc.append(nextByte());
1842
1843 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1844
1845 }
1846
1847 /**
1848 * Helper function to read an optional pool entry (with given function); this is used while parsing
1849 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor,
1850 * as per JVMS.
1851 */
1852 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) {
1853 return (index == 0) ?
1854 defaultValue :
1855 poolFunc.apply(index);
1856 }
1857
1858 Attribute readAttributeValue() {
1859 char c;
1860 try {
1861 c = (char)buf.getByte(bp++);
1862 } catch (UnderflowException e) {
1863 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1864 }
1865 switch (c) {
1866 case 'B':
1867 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar()));
1868 case 'C':
1869 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar()));
1870 case 'D':
1871 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar()));
1872 case 'F':
1873 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar()));
1874 case 'I':
1875 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar()));
1876 case 'J':
1877 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar()));
1878 case 'S':
1879 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar()));
1880 case 'Z':
1881 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar()));
1882 case 's':
1883 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString());
1884 case 'e':
1885 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar()));
1886 case 'c':
1887 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1888 case '[': {
1889 int n = nextChar();
1890 ListBuffer<Attribute> l = new ListBuffer<>();
1891 for (int i=0; i<n; i++)
1892 l.append(readAttributeValue());
1893 return new ArrayAttributeProxy(l.toList());
1894 }
1895 case '@':
1896 return readCompoundAnnotation();
1897 default:
1898 throw new AssertionError("unknown annotation tag '" + c + "'");
1899 }
1900 }
1901
1902 interface ProxyVisitor extends Attribute.Visitor {
1903 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1904 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1905 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1906 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1907 }
1908
1909 static class EnumAttributeProxy extends Attribute {
1910 Type enumType;
1911 Name enumerator;
1912 public EnumAttributeProxy(Type enumType, Name enumerator) {
1913 super(null);
1914 this.enumType = enumType;
1915 this.enumerator = enumerator;
1916 }
1917 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1918 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1919 public String toString() {
1920 return "/*proxy enum*/" + enumType + "." + enumerator;
1921 }
1922 }
1923
1924 static class ClassAttributeProxy extends Attribute {
1925 Type classType;
1926 public ClassAttributeProxy(Type classType) {
1927 super(null);
1928 this.classType = classType;
1929 }
1930 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1931 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1932 public String toString() {
1933 return "/*proxy class*/" + classType + ".class";
1934 }
1935 }
1936
1937 static class ArrayAttributeProxy extends Attribute {
1938 List<Attribute> values;
1939 ArrayAttributeProxy(List<Attribute> values) {
1940 super(null);
1941 this.values = values;
1942 }
1943 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1944 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1945 public String toString() {
1946 return "{" + values + "}";
1947 }
1948 }
1949
1950 /** A temporary proxy representing a compound attribute.
1951 */
1952 static class CompoundAnnotationProxy extends Attribute {
1953 final List<Pair<Name,Attribute>> values;
1954 public CompoundAnnotationProxy(Type type,
1955 List<Pair<Name,Attribute>> values) {
1956 super(type);
1957 this.values = values;
1958 }
1959 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1960 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1961 public String toString() {
1962 StringBuilder buf = new StringBuilder();
1963 buf.append("@");
1964 buf.append(type.tsym.getQualifiedName());
1965 buf.append("/*proxy*/{");
1966 boolean first = true;
1967 for (List<Pair<Name,Attribute>> v = values;
1968 v.nonEmpty(); v = v.tail) {
1969 Pair<Name,Attribute> value = v.head;
1970 if (!first) buf.append(",");
1971 first = false;
1972 buf.append(value.fst);
1973 buf.append("=");
1974 buf.append(value.snd);
1975 }
1976 buf.append("}");
1977 return buf.toString();
1978 }
1979 }
1980
1981 /** A temporary proxy representing a type annotation.
1982 */
1983 static class TypeAnnotationProxy {
1984 final CompoundAnnotationProxy compound;
1985 final TypeAnnotationPosition position;
1986 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1987 TypeAnnotationPosition position) {
1988 this.compound = compound;
1989 this.position = position;
1990 }
1991 }
1992
1993 class AnnotationDeproxy implements ProxyVisitor {
1994 private ClassSymbol requestingOwner;
1995
1996 AnnotationDeproxy(ClassSymbol owner) {
1997 this.requestingOwner = owner;
1998 }
1999
2000 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2001 // also must fill in types!!!!
2002 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2003 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2004 buf.append(deproxyCompound(l.head));
2005 }
2006 return buf.toList();
2007 }
2008
2009 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2010 Type annotationType = resolvePossibleProxyType(a.type);
2011 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2012 for (List<Pair<Name,Attribute>> l = a.values;
2013 l.nonEmpty();
2014 l = l.tail) {
2015 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2016 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2017 }
2018 return new Attribute.Compound(annotationType, buf.toList());
2019 }
2020
2021 MethodSymbol findAccessMethod(Type container, Name name) {
2022 CompletionFailure failure = null;
2023 try {
2024 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2025 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2026 return (MethodSymbol) sym;
2027 }
2028 } catch (CompletionFailure ex) {
2029 failure = ex;
2030 }
2031 // The method wasn't found: emit a warning and recover
2032 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2033 try {
2034 if (lintClassfile) {
2035 if (failure == null) {
2036 log.warning(Warnings.AnnotationMethodNotFound(container, name));
2037 } else {
2038 log.warning(Warnings.AnnotationMethodNotFoundReason(container,
2039 name,
2040 failure.getDetailValue()));//diagnostic, if present
2041 }
2042 }
2043 } finally {
2044 log.useSource(prevSource);
2045 }
2046 // Construct a new method type and symbol. Use bottom
2047 // type (typeof null) as return type because this type is
2048 // a subtype of all reference types and can be converted
2049 // to primitive types by unboxing.
2050 MethodType mt = new MethodType(List.nil(),
2051 syms.botType,
2052 List.nil(),
2053 syms.methodClass);
2054 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2055 }
2056
2057 Attribute result;
2058 Type type;
2059 Attribute deproxy(Type t, Attribute a) {
2060 Type oldType = type;
2061 try {
2062 type = t;
2063 a.accept(this);
2064 return result;
2065 } finally {
2066 type = oldType;
2067 }
2068 }
2069
2070 // implement Attribute.Visitor below
2071
2072 public void visitConstant(Attribute.Constant value) {
2073 // assert value.type == type;
2074 result = value;
2075 }
2076
2077 public void visitClass(Attribute.Class clazz) {
2078 result = clazz;
2079 }
2080
2081 public void visitEnum(Attribute.Enum e) {
2082 throw new AssertionError(); // shouldn't happen
2083 }
2084
2085 public void visitCompound(Attribute.Compound compound) {
2086 throw new AssertionError(); // shouldn't happen
2087 }
2088
2089 public void visitArray(Attribute.Array array) {
2090 throw new AssertionError(); // shouldn't happen
2091 }
2092
2093 public void visitError(Attribute.Error e) {
2094 throw new AssertionError(); // shouldn't happen
2095 }
2096
2097 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2098 // type.tsym.flatName() should == proxy.enumFlatName
2099 Type enumType = resolvePossibleProxyType(proxy.enumType);
2100 TypeSymbol enumTypeSym = enumType.tsym;
2101 VarSymbol enumerator = null;
2102 CompletionFailure failure = null;
2103 try {
2104 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2105 if (sym.kind == VAR) {
2106 enumerator = (VarSymbol)sym;
2107 break;
2108 }
2109 }
2110 }
2111 catch (CompletionFailure ex) {
2112 failure = ex;
2113 }
2114 if (enumerator == null) {
2115 if (failure != null) {
2116 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile,
2117 enumTypeSym,
2118 proxy.enumerator,
2119 failure.getDiagnostic()));
2120 } else {
2121 log.warning(Warnings.UnknownEnumConstant(currentClassFile,
2122 enumTypeSym,
2123 proxy.enumerator));
2124 }
2125 result = new Attribute.Enum(enumTypeSym.type,
2126 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2127 } else {
2128 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2129 }
2130 }
2131
2132 @Override
2133 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2134 Type classType = resolvePossibleProxyType(proxy.classType);
2135 result = new Attribute.Class(types, classType);
2136 }
2137
2138 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2139 int length = proxy.values.length();
2140 Attribute[] ats = new Attribute[length];
2141 Type elemtype = types.elemtype(type);
2142 int i = 0;
2143 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2144 ats[i++] = deproxy(elemtype, p.head);
2145 }
2146 result = new Attribute.Array(type, ats);
2147 }
2148
2149 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2150 result = deproxyCompound(proxy);
2151 }
2152
2153 Type resolvePossibleProxyType(Type t) {
2154 if (t instanceof ProxyType proxyType) {
2155 Assert.check(requestingOwner.owner.kind == MDL);
2156 ModuleSymbol prevCurrentModule = currentModule;
2157 currentModule = (ModuleSymbol) requestingOwner.owner;
2158 try {
2159 return proxyType.resolve();
2160 } finally {
2161 currentModule = prevCurrentModule;
2162 }
2163 } else {
2164 return t;
2165 }
2166 }
2167 }
2168
2169 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2170 final MethodSymbol sym;
2171 final Attribute value;
2172 final JavaFileObject classFile = currentClassFile;
2173
2174 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2175 super(currentOwner.kind == MTH
2176 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2177 this.sym = sym;
2178 this.value = value;
2179 }
2180
2181 @Override
2182 public void run() {
2183 JavaFileObject previousClassFile = currentClassFile;
2184 try {
2185 // Reset the interim value set earlier in
2186 // attachAnnotationDefault().
2187 sym.defaultValue = null;
2188 currentClassFile = classFile;
2189 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2190 } finally {
2191 currentClassFile = previousClassFile;
2192 }
2193 }
2194
2195 @Override
2196 public String toString() {
2197 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2198 }
2199 }
2200
2201 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2202 final Symbol sym;
2203 final List<CompoundAnnotationProxy> l;
2204 final JavaFileObject classFile;
2205
2206 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2207 super(currentOwner.kind == MTH
2208 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2209 if (sym.kind == TYP && sym.owner.kind == MDL) {
2210 this.sym = sym.owner;
2211 } else {
2212 this.sym = sym;
2213 }
2214 this.l = l;
2215 this.classFile = currentClassFile;
2216 }
2217
2218 @Override
2219 public void run() {
2220 JavaFileObject previousClassFile = currentClassFile;
2221 try {
2222 currentClassFile = classFile;
2223 List<Attribute.Compound> newList = deproxyCompoundList(l);
2224 for (Attribute.Compound attr : newList) {
2225 if (attr.type.tsym == syms.deprecatedType.tsym) {
2226 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2227 Attribute forRemoval = attr.member(names.forRemoval);
2228 if (forRemoval instanceof Attribute.Constant constant) {
2229 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
2230 sym.flags_field |= DEPRECATED_REMOVAL;
2231 }
2232 }
2233 }
2234 }
2235 if (sym.annotationsPendingCompletion()) {
2236 sym.setDeclarationAttributes(newList);
2237 } else {
2238 sym.appendAttributes(newList);
2239 }
2240 } finally {
2241 currentClassFile = previousClassFile;
2242 }
2243 }
2244
2245 @Override
2246 public String toString() {
2247 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2248 }
2249 }
2250
2251 class TypeAnnotationCompleter extends AnnotationCompleter {
2252
2253 List<TypeAnnotationProxy> proxies;
2254
2255 TypeAnnotationCompleter(Symbol sym,
2256 List<TypeAnnotationProxy> proxies) {
2257 super(sym, List.nil());
2258 this.proxies = proxies;
2259 }
2260
2261 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2262 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2263 for (TypeAnnotationProxy proxy: proxies) {
2264 Attribute.Compound compound = deproxyCompound(proxy.compound);
2265 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2266 buf.add(typeCompound);
2267 }
2268 return buf.toList();
2269 }
2270
2271 @Override
2272 public void run() {
2273 JavaFileObject previousClassFile = currentClassFile;
2274 try {
2275 currentClassFile = classFile;
2276 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2277 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2278 addTypeAnnotationsToSymbol(sym, newList);
2279 } finally {
2280 currentClassFile = previousClassFile;
2281 }
2282 }
2283 }
2284
2285 /**
2286 * Rewrites types in the given symbol to include type annotations.
2287 *
2288 * <p>The list of type annotations includes annotations for all types in the signature of the
2289 * symbol. Associating the annotations with the correct type requires interpreting the JVMS
2290 * 4.7.20-A target_type to locate the correct type to rewrite, and then interpreting the JVMS
2291 * 4.7.20.2 type_path to associate the annotation with the correct contained type.
2292 */
2293 private static void addTypeAnnotationsToSymbol(
2294 Symbol s, List<Attribute.TypeCompound> attributes) {
2295 new TypeAnnotationSymbolVisitor(attributes).visit(s, null);
2296 }
2297
2298 private static class TypeAnnotationSymbolVisitor
2299 extends Types.DefaultSymbolVisitor<Void, Void> {
2300
2301 private final List<Attribute.TypeCompound> attributes;
2302
2303 private TypeAnnotationSymbolVisitor(List<Attribute.TypeCompound> attributes) {
2304 this.attributes = attributes;
2305 }
2306
2307 @Override
2308 public Void visitClassSymbol(Symbol.ClassSymbol s, Void unused) {
2309 ClassType t = (ClassType) s.type;
2310 int i = 0;
2311 ListBuffer<Type> interfaces = new ListBuffer<>();
2312 for (Type itf : t.interfaces_field) {
2313 interfaces.add(addTypeAnnotations(itf, classExtends(i++)));
2314 }
2315 t.interfaces_field = interfaces.toList();
2316 t.supertype_field = addTypeAnnotations(t.supertype_field, classExtends(65535));
2317 if (t.typarams_field != null) {
2318 t.typarams_field =
2319 rewriteTypeParameters(
2320 t.typarams_field, TargetType.CLASS_TYPE_PARAMETER_BOUND);
2321 }
2322 return null;
2323 }
2324
2325 @Override
2326 public Void visitMethodSymbol(Symbol.MethodSymbol s, Void unused) {
2327 Type t = s.type;
2328 if (t.hasTag(TypeTag.FORALL)) {
2329 Type.ForAll fa = (Type.ForAll) t;
2330 fa.tvars = rewriteTypeParameters(fa.tvars, TargetType.METHOD_TYPE_PARAMETER_BOUND);
2331 t = fa.qtype;
2332 }
2333 MethodType mt = (MethodType) t;
2334 ListBuffer<Type> argtypes = new ListBuffer<>();
2335 int i = 0;
2336 for (Symbol.VarSymbol param : s.params) {
2337 param.type = addTypeAnnotations(param.type, methodFormalParameter(i++));
2338 argtypes.add(param.type);
2339 }
2340 mt.argtypes = argtypes.toList();
2341 ListBuffer<Type> thrown = new ListBuffer<>();
2342 i = 0;
2343 for (Type thrownType : mt.thrown) {
2344 thrown.add(addTypeAnnotations(thrownType, thrownType(i++)));
2345 }
2346 mt.thrown = thrown.toList();
2347 /* possible information loss if the type of the method is void then we can't add type
2348 * annotations to it
2349 */
2350 if (!mt.restype.hasTag(TypeTag.VOID)) {
2351 mt.restype = addTypeAnnotations(mt.restype, TargetType.METHOD_RETURN);
2352 }
2353
2354 Type recvtype = mt.recvtype != null ? mt.recvtype : s.implicitReceiverType();
2355 if (recvtype != null) {
2356 Type annotated = addTypeAnnotations(recvtype, TargetType.METHOD_RECEIVER);
2357 if (annotated != recvtype) {
2358 mt.recvtype = annotated;
2359 }
2360 }
2361 return null;
2362 }
2363
2364 @Override
2365 public Void visitVarSymbol(Symbol.VarSymbol s, Void unused) {
2366 s.type = addTypeAnnotations(s.type, TargetType.FIELD);
2367 return null;
2368 }
2369
2370 @Override
2371 public Void visitSymbol(Symbol s, Void unused) {
2372 return null;
2373 }
2374
2375 private List<Type> rewriteTypeParameters(List<Type> tvars, TargetType boundType) {
2376 ListBuffer<Type> tvarbuf = new ListBuffer<>();
2377 int typeVariableIndex = 0;
2378 for (Type tvar : tvars) {
2379 Type bound = tvar.getUpperBound();
2380 if (bound.isCompound()) {
2381 ClassType ct = (ClassType) bound;
2382 int boundIndex = 0;
2383 if (ct.supertype_field != null) {
2384 ct.supertype_field =
2385 addTypeAnnotations(
2386 ct.supertype_field,
2387 typeParameterBound(
2388 boundType, typeVariableIndex, boundIndex++));
2389 }
2390 ListBuffer<Type> itfbuf = new ListBuffer<>();
2391 for (Type itf : ct.interfaces_field) {
2392 itfbuf.add(
2393 addTypeAnnotations(
2394 itf,
2395 typeParameterBound(
2396 boundType, typeVariableIndex, boundIndex++)));
2397 }
2398 ct.interfaces_field = itfbuf.toList();
2399 } else {
2400 bound =
2401 addTypeAnnotations(
2402 bound,
2403 typeParameterBound(
2404 boundType,
2405 typeVariableIndex,
2406 bound.isInterface() ? 1 : 0));
2407 }
2408 ((TypeVar) tvar).setUpperBound(bound);
2409 tvarbuf.add(tvar);
2410 typeVariableIndex++;
2411 }
2412 return tvarbuf.toList();
2413 }
2414
2415 private Type addTypeAnnotations(Type type, TargetType targetType) {
2416 return addTypeAnnotations(type, pos -> pos.type == targetType);
2417 }
2418
2419 private Type addTypeAnnotations(Type type, Predicate<TypeAnnotationPosition> filter) {
2420 Assert.checkNonNull(type);
2421
2422 // Find type annotations that match the given target type
2423 ListBuffer<Attribute.TypeCompound> filtered = new ListBuffer<>();
2424 for (Attribute.TypeCompound attribute : this.attributes) {
2425 if (filter.test(attribute.position)) {
2426 filtered.add(attribute);
2427 }
2428 }
2429 if (filtered.isEmpty()) {
2430 return type;
2431 }
2432
2433 // Group the matching annotations by their type path. Each group of annotations will be
2434 // added to a type at that location.
2435 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2436 attributesByPath = new HashMap<>();
2437 for (Attribute.TypeCompound attribute : filtered.toList()) {
2438 attributesByPath
2439 .computeIfAbsent(attribute.position.location, k -> new ListBuffer<>())
2440 .add(attribute);
2441 }
2442
2443 // Search the structure of the type to find the contained types at each type path
2444 Map<Type, List<Attribute.TypeCompound>> attributesByType = new HashMap<>();
2445 new TypeAnnotationLocator(attributesByPath, attributesByType).visit(type, List.nil());
2446
2447 // Rewrite the type and add the annotations
2448 type = new TypeAnnotationTypeMapping(attributesByType).visit(type, null);
2449 Assert.check(attributesByType.isEmpty(), "Failed to apply annotations to types");
2450
2451 return type;
2452 }
2453
2454 private static Predicate<TypeAnnotationPosition> typeParameterBound(
2455 TargetType targetType, int parameterIndex, int boundIndex) {
2456 return pos ->
2457 pos.type == targetType
2458 && pos.parameter_index == parameterIndex
2459 && pos.bound_index == boundIndex;
2460 }
2461
2462 private static Predicate<TypeAnnotationPosition> methodFormalParameter(int index) {
2463 return pos ->
2464 pos.type == TargetType.METHOD_FORMAL_PARAMETER && pos.parameter_index == index;
2465 }
2466
2467 private static Predicate<TypeAnnotationPosition> thrownType(int index) {
2468 return pos -> pos.type == TargetType.THROWS && pos.type_index == index;
2469 }
2470
2471 private static Predicate<TypeAnnotationPosition> classExtends(int index) {
2472 return pos -> pos.type == TargetType.CLASS_EXTENDS && pos.type_index == index;
2473 }
2474 }
2475
2476 /**
2477 * Visit all contained types, assembling a type path to represent the current location, and
2478 * record the types at each type path that need to be annotated.
2479 */
2480 private static class TypeAnnotationLocator
2481 extends Types.DefaultTypeVisitor<Void, List<TypeAnnotationPosition.TypePathEntry>> {
2482 private final Map<List<TypeAnnotationPosition.TypePathEntry>,
2483 ListBuffer<Attribute.TypeCompound>> attributesByPath;
2484 private final Map<Type, List<Attribute.TypeCompound>> attributesByType;
2485
2486 private TypeAnnotationLocator(
2487 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2488 attributesByPath,
2489 Map<Type, List<Attribute.TypeCompound>> attributesByType) {
2490 this.attributesByPath = attributesByPath;
2491 this.attributesByType = attributesByType;
2492 }
2493
2494 @Override
2495 public Void visitClassType(ClassType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2496 // As described in JVMS 4.7.20.2, type annotations on nested types are located with
2497 // 'left-to-right' steps starting on 'the outermost part of the type for which a type
2498 // annotation is admissible'. So the current path represents the outermost containing
2499 // type of the type being visited, and we add type path steps for every contained nested
2500 // type.
2501 List<ClassType> enclosing = List.nil();
2502 for (Type curr = t;
2503 curr != null && curr != Type.noType;
2504 curr = curr.getEnclosingType()) {
2505 enclosing = enclosing.prepend((ClassType) curr);
2506 }
2507 for (ClassType te : enclosing) {
2508 if (te.typarams_field != null) {
2509 int i = 0;
2510 for (Type typaram : te.typarams_field) {
2511 visit(typaram, path.append(new TypeAnnotationPosition.TypePathEntry(
2512 TypeAnnotationPosition.TypePathEntryKind.TYPE_ARGUMENT, i++)));
2513 }
2514 }
2515 visitType(te, path);
2516 path = path.append(TypeAnnotationPosition.TypePathEntry.INNER_TYPE);
2517 }
2518 return null;
2519 }
2520
2521 @Override
2522 public Void visitWildcardType(
2523 WildcardType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2524 visit(t.type, path.append(TypeAnnotationPosition.TypePathEntry.WILDCARD));
2525 return super.visitWildcardType(t, path);
2526 }
2527
2528 @Override
2529 public Void visitArrayType(ArrayType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2530 visit(t.elemtype, path.append(TypeAnnotationPosition.TypePathEntry.ARRAY));
2531 return super.visitArrayType(t, path);
2532 }
2533
2534 @Override
2535 public Void visitType(Type t, List<TypeAnnotationPosition.TypePathEntry> path) {
2536 ListBuffer<Attribute.TypeCompound> attributes = attributesByPath.remove(path);
2537 if (attributes != null) {
2538 attributesByType.put(t, attributes.toList());
2539 }
2540 return null;
2541 }
2542 }
2543
2544 /** A type mapping that rewrites the type to include type annotations. */
2545 private static class TypeAnnotationTypeMapping extends Type.StructuralTypeMapping<Void> {
2546
2547 private final Map<Type, List<Attribute.TypeCompound>> attributesByType;
2548
2549 private TypeAnnotationTypeMapping(
2550 Map<Type, List<Attribute.TypeCompound>> attributesByType) {
2551 this.attributesByType = attributesByType;
2552 }
2553
2554 private <T extends Type> Type reannotate(T t, BiFunction<T, Void, Type> f) {
2555 // We're relying on object identify of Type instances to record where the annotations
2556 // need to be added, so we have to retrieve the annotations for each type before
2557 // rewriting it, and then add them after its contained types have been rewritten.
2558 List<Attribute.TypeCompound> attributes = attributesByType.remove(t);
2559 Type mapped = f.apply(t, null);
2560 if (attributes == null) {
2561 return mapped;
2562 }
2563 // Runtime-visible and -invisible annotations are completed separately, so if the same
2564 // type has annotations from both it will get annotated twice.
2565 TypeMetadata.Annotations existing = mapped.getMetadata(TypeMetadata.Annotations.class);
2566 if (existing != null) {
2567 existing.annotationBuffer().addAll(attributes);
2568 return mapped;
2569 }
2570 return mapped.annotatedType(attributes);
2571 }
2572
2573 @Override
2574 public Type visitClassType(ClassType t, Void unused) {
2575 return reannotate(t, super::visitClassType);
2576 }
2577
2578 @Override
2579 public Type visitWildcardType(WildcardType t, Void unused) {
2580 return reannotate(t, super::visitWildcardType);
2581 }
2582
2583 @Override
2584 public Type visitArrayType(ArrayType t, Void unused) {
2585 return reannotate(t, super::visitArrayType);
2586 }
2587
2588 @Override
2589 public Type visitType(Type t, Void unused) {
2590 return reannotate(t, (x, u) -> x);
2591 }
2592 }
2593
2594 /************************************************************************
2595 * Reading Symbols
2596 ***********************************************************************/
2597
2598 /** Read a field.
2599 */
2600 VarSymbol readField() {
2601 char rawFlags = nextChar();
2602 long flags = adjustFieldFlags(rawFlags);
2603 Name name = poolReader.getName(nextChar());
2604 Type type = poolReader.getType(nextChar());
2605 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2606 readMemberAttrs(v);
2607 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 ||
2608 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1)
2609 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v);
2610 return v;
2611 }
2612
2613 /** Read a method.
2614 */
2615 MethodSymbol readMethod() {
2616 char rawFlags = nextChar();
2617 long flags = adjustMethodFlags(rawFlags);
2618 Name name = poolReader.getName(nextChar());
2619 Type type = poolReader.getType(nextChar());
2620 if (currentOwner.isInterface() &&
2621 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2622 if (majorVersion > Version.V52.major ||
2623 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2624 if ((flags & (STATIC | PRIVATE)) == 0) {
2625 currentOwner.flags_field |= DEFAULT;
2626 flags |= DEFAULT | ABSTRACT;
2627 }
2628 } else {
2629 //protect against ill-formed classfiles
2630 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2631 Integer.toString(majorVersion),
2632 Integer.toString(minorVersion));
2633 }
2634 }
2635 validateMethodType(name, type);
2636 if (name == names.init && currentOwner.hasOuterInstance()) {
2637 // Sometimes anonymous classes don't have an outer
2638 // instance, however, there is no reliable way to tell so
2639 // we never strip this$n
2640 // ditto for local classes. Local classes that have an enclosing method set
2641 // won't pass the "hasOuterInstance" check above, but those that don't have an
2642 // enclosing method (i.e. from initializers) will pass that check.
2643 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2644 if (!currentOwner.name.isEmpty() && !local)
2645 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2646 type.getReturnType(),
2647 type.getThrownTypes(),
2648 syms.methodClass);
2649 }
2650 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2651 if (types.isSignaturePolymorphic(m)) {
2652 m.flags_field |= SIGNATURE_POLYMORPHIC;
2653 }
2654 if (saveParameterNames)
2655 initParameterNames(m);
2656 Symbol prevOwner = currentOwner;
2657 currentOwner = m;
2658 try {
2659 readMemberAttrs(m);
2660 } finally {
2661 currentOwner = prevOwner;
2662 }
2663 validateMethodType(name, m.type);
2664 setParameters(m, type);
2665
2666 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1)
2667 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m);
2668 if ((flags & VARARGS) != 0) {
2669 final Type last = type.getParameterTypes().last();
2670 if (last == null || !last.hasTag(ARRAY)) {
2671 m.flags_field &= ~VARARGS;
2672 throw badClassFile("malformed.vararg.method", m);
2673 }
2674 }
2675
2676 return m;
2677 }
2678
2679 void validateMethodType(Name name, Type t) {
2680 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) ||
2681 (name == names.init && !t.getReturnType().hasTag(TypeTag.VOID))) {
2682 throw badClassFile("method.descriptor.invalid", name);
2683 }
2684 }
2685
2686 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2687 if (args.isEmpty()) {
2688 return args;
2689 }
2690 boolean isVarargs = (flags & VARARGS) != 0;
2691 if (isVarargs) {
2692 Type varargsElem = args.last();
2693 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2694 for (Type t : args) {
2695 adjustedArgs.append(t != varargsElem ?
2696 t :
2697 ((ArrayType)t).makeVarargs());
2698 }
2699 args = adjustedArgs.toList();
2700 }
2701 return args.tail;
2702 }
2703
2704 /**
2705 * Init the parameter names array.
2706 * Parameter names are currently inferred from the names in the
2707 * LocalVariableTable attributes of a Code attribute.
2708 * (Note: this means parameter names are currently not available for
2709 * methods without a Code attribute.)
2710 * This method initializes an array in which to store the name indexes
2711 * of parameter names found in LocalVariableTable attributes. It is
2712 * slightly supersized to allow for additional slots with a start_pc of 0.
2713 */
2714 void initParameterNames(MethodSymbol sym) {
2715 // make allowance for synthetic parameters.
2716 final int excessSlots = 4;
2717 int expectedParameterSlots =
2718 Code.width(sym.type.getParameterTypes()) + excessSlots;
2719 if (parameterNameIndicesLvt == null
2720 || parameterNameIndicesLvt.length < expectedParameterSlots) {
2721 parameterNameIndicesLvt = new int[expectedParameterSlots];
2722 } else
2723 Arrays.fill(parameterNameIndicesLvt, 0);
2724 }
2725
2726 /**
2727 * Set the parameters for a method symbol, including any names and
2728 * annotations that were read.
2729 *
2730 * <p>The type of the symbol may have changed while reading the
2731 * method attributes (see the Signature attribute). This may be
2732 * because of generic information or because anonymous synthetic
2733 * parameters were added. The original type (as read from the
2734 * method descriptor) is used to help guess the existence of
2735 * anonymous synthetic parameters.
2736 */
2737 void setParameters(MethodSymbol sym, Type jvmType) {
2738 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2739 // the code in readMethod may have skipped the first
2740 // parameter when setting up the MethodType. If so, we
2741 // make a corresponding allowance here for the position of
2742 // the first parameter. Note that this assumes the
2743 // skipped parameter has a width of 1 -- i.e. it is not
2744 // a double width type (long or double.)
2745 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2746 // Sometimes anonymous classes don't have an outer
2747 // instance, however, there is no reliable way to tell so
2748 // we never strip this$n
2749 if (!currentOwner.name.isEmpty())
2750 firstParamLvt += 1;
2751 }
2752
2753 if (sym.type != jvmType) {
2754 // reading the method attributes has caused the
2755 // symbol's type to be changed. (i.e. the Signature
2756 // attribute.) This may happen if there are hidden
2757 // (synthetic) parameters in the descriptor, but not
2758 // in the Signature. The position of these hidden
2759 // parameters is unspecified; for now, assume they are
2760 // at the beginning, and so skip over them. The
2761 // primary case for this is two hidden parameters
2762 // passed into Enum constructors.
2763 int skip = Code.width(jvmType.getParameterTypes())
2764 - Code.width(sym.type.getParameterTypes());
2765 firstParamLvt += skip;
2766 }
2767 Set<Name> paramNames = new HashSet<>();
2768 ListBuffer<VarSymbol> params = new ListBuffer<>();
2769 // we maintain two index pointers, one for the LocalVariableTable attribute
2770 // and the other for the MethodParameters attribute.
2771 // This is needed as the MethodParameters attribute may contain
2772 // name_index = 0 in which case we want to fall back to the LocalVariableTable.
2773 // In such case, we still want to read the flags from the MethodParameters with that index.
2774 int nameIndexLvt = firstParamLvt;
2775 int nameIndexMp = 0;
2776 int annotationIndex = 0;
2777 for (Type t: sym.type.getParameterTypes()) {
2778 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames);
2779 params.append(param);
2780 if (parameterAnnotations != null) {
2781 ParameterAnnotations annotations = parameterAnnotations[annotationIndex];
2782 if (annotations != null && annotations.proxies != null
2783 && !annotations.proxies.isEmpty()) {
2784 annotate.normal(new AnnotationCompleter(param, annotations.proxies));
2785 }
2786 }
2787 nameIndexLvt += Code.width(t);
2788 nameIndexMp++;
2789 annotationIndex++;
2790 }
2791 if (parameterAnnotations != null && parameterAnnotations.length != annotationIndex) {
2792 throw badClassFile("bad.runtime.invisible.param.annotations", sym);
2793 }
2794 Assert.checkNull(sym.params);
2795 sym.params = params.toList();
2796 parameterAnnotations = null;
2797 parameterNameIndicesLvt = null;
2798 parameterNameIndicesMp = null;
2799 parameterAccessFlags = null;
2800 }
2801
2802 /**
2803 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method.
2804 * Flags are optionally read from the MethodParameters attribute.
2805 * Names are optionally read from the MethodParameters attribute. If the constant pool index
2806 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute.
2807 * @param mpIndex the index of the parameter in the MethodParameters attribute
2808 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute
2809 */
2810 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) {
2811 long flags = PARAMETER;
2812 Name argName;
2813 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length
2814 && parameterAccessFlags[mpIndex] != 0) {
2815 flags |= parameterAccessFlags[mpIndex];
2816 }
2817 if (parameterNameIndicesMp != null
2818 // if name_index is 0, then we might still get a name from the LocalVariableTable
2819 && parameterNameIndicesMp[mpIndex] != 0) {
2820 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty);
2821 flags |= NAME_FILLED;
2822 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length
2823 && parameterNameIndicesLvt[lvtIndex] != 0) {
2824 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty);
2825 flags |= NAME_FILLED;
2826 } else {
2827 String prefix = "arg";
2828 while (true) {
2829 argName = names.fromString(prefix + exclude.size());
2830 if (!exclude.contains(argName))
2831 break;
2832 prefix += "$";
2833 }
2834 }
2835 exclude.add(argName);
2836 return new ParamSymbol(flags, argName, t, owner);
2837 }
2838
2839 /**
2840 * skip n bytes
2841 */
2842 void skipBytes(int n) {
2843 bp = bp + n;
2844 }
2845
2846 /** Skip a field or method
2847 */
2848 void skipMember() {
2849 bp = bp + 6;
2850 char ac = nextChar();
2851 for (int i = 0; i < ac; i++) {
2852 bp = bp + 2;
2853 int attrLen = nextInt();
2854 bp = bp + attrLen;
2855 }
2856 }
2857
2858 void skipInnerClasses() {
2859 int n = nextChar();
2860 for (int i = 0; i < n; i++) {
2861 nextChar();
2862 nextChar();
2863 nextChar();
2864 nextChar();
2865 }
2866 }
2867
2868 /** Enter type variables of this classtype and all enclosing ones in
2869 * `typevars'.
2870 */
2871 protected void enterTypevars(Symbol sym, Type t) {
2872 if (t.getEnclosingType() != null) {
2873 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
2874 enterTypevars(sym.owner, t.getEnclosingType());
2875 }
2876 } else if (sym.kind == MTH && !sym.isStatic()) {
2877 enterTypevars(sym.owner, sym.owner.type);
2878 }
2879 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
2880 typevars.enter(xs.head.tsym);
2881 }
2882 }
2883
2884 protected ClassSymbol enterClass(Name name) {
2885 return syms.enterClass(currentModule, name);
2886 }
2887
2888 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
2889 return syms.enterClass(currentModule, name, owner);
2890 }
2891
2892 /** Read contents of a given class symbol `c'. Both external and internal
2893 * versions of an inner class are read.
2894 */
2895 void readClass(ClassSymbol c) {
2896 ClassType ct = (ClassType)c.type;
2897
2898 // allocate scope for members
2899 c.members_field = WriteableScope.create(c);
2900
2901 // prepare type variable table
2902 typevars = typevars.dup(currentOwner);
2903 if (ct.getEnclosingType().hasTag(CLASS))
2904 enterTypevars(c.owner, ct.getEnclosingType());
2905
2906 // read flags, or skip if this is an inner class
2907 long f = nextChar();
2908 long flags = adjustClassFlags(f);
2909 if ((flags & MODULE) == 0) {
2910 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags;
2911 // read own class name and check that it matches
2912 currentModule = c.packge().modle;
2913 ClassSymbol self = poolReader.getClass(nextChar());
2914 if (c != self) {
2915 throw badClassFile("class.file.wrong.class",
2916 self.flatname);
2917 }
2918 } else {
2919 if (majorVersion < Version.V53.major) {
2920 throw badClassFile("anachronistic.module.info",
2921 Integer.toString(majorVersion),
2922 Integer.toString(minorVersion));
2923 }
2924 c.flags_field = flags;
2925 if (c.owner.kind != MDL) {
2926 throw badClassFile("module.info.definition.expected");
2927 }
2928 currentModule = (ModuleSymbol) c.owner;
2929 int this_class = nextChar();
2930 // temp, no check on this_class
2931 }
2932
2933 // class attributes must be read before class
2934 // skip ahead to read class attributes
2935 int startbp = bp;
2936 nextChar();
2937 char interfaceCount = nextChar();
2938 bp += interfaceCount * 2;
2939 char fieldCount = nextChar();
2940 for (int i = 0; i < fieldCount; i++) skipMember();
2941 char methodCount = nextChar();
2942 for (int i = 0; i < methodCount; i++) skipMember();
2943 readClassAttrs(c);
2944
2945 if (c.permitted != null && !c.permitted.isEmpty()) {
2946 c.flags_field |= SEALED;
2947 }
2948
2949 // reset and read rest of classinfo
2950 bp = startbp;
2951 int n = nextChar();
2952 if ((flags & MODULE) != 0 && n > 0) {
2953 throw badClassFile("module.info.invalid.super.class");
2954 }
2955 if (ct.supertype_field == null)
2956 ct.supertype_field =
2957 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType);
2958 n = nextChar();
2959 List<Type> is = List.nil();
2960 for (int i = 0; i < n; i++) {
2961 Type _inter = poolReader.getClass(nextChar()).erasure(types);
2962 is = is.prepend(_inter);
2963 }
2964 if (ct.interfaces_field == null)
2965 ct.interfaces_field = is.reverse();
2966
2967 Assert.check(fieldCount == nextChar());
2968 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2969 Assert.check(methodCount == nextChar());
2970 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2971 if (c.isRecord()) {
2972 for (RecordComponent rc: c.getRecordComponents()) {
2973 rc.accessor = lookupMethod(c, rc.name, List.nil());
2974 }
2975 }
2976 typevars = typevars.leave();
2977 }
2978
2979 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) {
2980 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) {
2981 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) {
2982 return (MethodSymbol) s;
2983 }
2984 }
2985 return null;
2986 }
2987
2988 /** Read inner class info. For each inner/outer pair allocate a
2989 * member class.
2990 */
2991 void readInnerClasses(ClassSymbol c) {
2992 int n = nextChar();
2993 for (int i = 0; i < n; i++) {
2994 nextChar(); // skip inner class symbol
2995 int outerIdx = nextChar();
2996 int nameIdx = nextChar();
2997 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null);
2998 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty);
2999 if (name == null) name = names.empty;
3000 long flags = adjustClassFlags(nextChar());
3001 if (outer != null) { // we have a member class
3002 if (name == names.empty)
3003 name = names.one;
3004 ClassSymbol member = enterClass(name, outer);
3005 if ((flags & STATIC) == 0) {
3006 ((ClassType)member.type).setEnclosingType(outer.type);
3007 if (member.erasure_field != null)
3008 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
3009 }
3010 if (c == outer && member.owner == c) {
3011 member.flags_field = flags;
3012 enterMember(c, member);
3013 }
3014 }
3015 }
3016 }
3017
3018 /** Read a class definition from the bytes in buf.
3019 */
3020 private void readClassBuffer(ClassSymbol c) throws IOException {
3021 int magic = nextInt();
3022 if (magic != JAVA_MAGIC)
3023 throw badClassFile("illegal.start.of.class.file");
3024
3025 minorVersion = nextChar();
3026 majorVersion = nextChar();
3027 int maxMajor = Version.MAX().major;
3028 int maxMinor = Version.MAX().minor;
3029 boolean previewClassFile =
3030 minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3031 if (majorVersion > maxMajor ||
3032 majorVersion * 1000 + minorVersion <
3033 Version.MIN().major * 1000 + Version.MIN().minor) {
3034 if (majorVersion == (maxMajor + 1) && !previewClassFile)
3035 log.warning(Warnings.BigMajorVersion(currentClassFile,
3036 majorVersion,
3037 maxMajor));
3038 else
3039 throw badClassFile("wrong.version",
3040 Integer.toString(majorVersion),
3041 Integer.toString(minorVersion),
3042 Integer.toString(maxMajor),
3043 Integer.toString(maxMinor));
3044 }
3045 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT;
3046
3047 if (previewClassFile) {
3048 if (!preview.isEnabled()) {
3049 log.error(preview.disabledError(currentClassFile, majorVersion));
3050 } else {
3051 preview.warnPreview(c.classfile, majorVersion);
3052 }
3053 }
3054
3055 poolReader = new PoolReader(this, names, syms);
3056 bp = poolReader.readPool(buf, bp);
3057 if (signatureBuffer.length < bp) {
3058 int ns = Integer.highestOneBit(bp) << 1;
3059 signatureBuffer = new byte[ns];
3060 }
3061 readClass(c);
3062 if (previewClassFile) {
3063 if ((c.flags_field & SYNTHETIC) != 0 &&
3064 c.owner.kind == PCK &&
3065 (c.flags_field & AUXILIARY) == 0 &&
3066 (c.flags_field & FINAL) != 0) {
3067 c.flags_field |= UNNAMED_CLASS;
3068 }
3069 }
3070 }
3071
3072 public void readClassFile(ClassSymbol c) {
3073 currentOwner = c;
3074 currentClassFile = c.classfile;
3075 warnedAttrs.clear();
3076 filling = true;
3077 target = null;
3078 repeatable = null;
3079 try {
3080 bp = 0;
3081 buf.reset();
3082 try (InputStream input = c.classfile.openInputStream()) {
3083 buf.appendStream(input);
3084 }
3085 readClassBuffer(c);
3086 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
3087 List<Type> missing = missingTypeVariables;
3088 List<Type> found = foundTypeVariables;
3089 missingTypeVariables = List.nil();
3090 foundTypeVariables = List.nil();
3091 interimUses = List.nil();
3092 interimProvides = List.nil();
3093 filling = false;
3094 ClassType ct = (ClassType)currentOwner.type;
3095 ct.supertype_field =
3096 types.subst(ct.supertype_field, missing, found);
3097 ct.interfaces_field =
3098 types.subst(ct.interfaces_field, missing, found);
3099 ct.typarams_field =
3100 types.substBounds(ct.typarams_field, missing, found);
3101 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
3102 types.head.tsym.type = types.head;
3103 }
3104 } else if (missingTypeVariables.isEmpty() !=
3105 foundTypeVariables.isEmpty()) {
3106 Name name = missingTypeVariables.head.tsym.name;
3107 throw badClassFile("undecl.type.var", name);
3108 }
3109
3110 if ((c.flags_field & Flags.ANNOTATION) != 0) {
3111 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
3112 } else {
3113 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
3114 }
3115
3116 if (c == currentModule.module_info) {
3117 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
3118 Assert.check(currentModule.isCompleted());
3119 currentModule.usesProvidesCompleter =
3120 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
3121 } else {
3122 currentModule.uses = List.nil();
3123 currentModule.provides = List.nil();
3124 }
3125 }
3126 } catch (IOException | ClosedFileSystemException ex) {
3127 throw badClassFile("unable.to.access.file", ex.toString());
3128 } catch (ArrayIndexOutOfBoundsException ex) {
3129 throw badClassFile("bad.class.file", c.flatname);
3130 } finally {
3131 interimUses = List.nil();
3132 interimProvides = List.nil();
3133 missingTypeVariables = List.nil();
3134 foundTypeVariables = List.nil();
3135 filling = false;
3136 }
3137 }
3138
3139 /** We can only read a single class file at a time; this
3140 * flag keeps track of when we are currently reading a class
3141 * file.
3142 */
3143 public boolean filling = false;
3144
3145 /************************************************************************
3146 * Adjusting flags
3147 ***********************************************************************/
3148
3149 long adjustFieldFlags(long flags) {
3150 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3151 if (allowValueClasses && previewClassFile && (flags & ACC_STRICT) != 0) {
3152 flags &= ~ACC_STRICT;
3153 flags |= STRICT;
3154 }
3155 return flags;
3156 }
3157
3158 long adjustMethodFlags(long flags) {
3159 if ((flags & ACC_BRIDGE) != 0) {
3160 flags &= ~ACC_BRIDGE;
3161 flags |= BRIDGE;
3162 }
3163 if ((flags & ACC_VARARGS) != 0) {
3164 flags &= ~ACC_VARARGS;
3165 flags |= VARARGS;
3166 }
3167 return flags;
3168 }
3169
3170 long adjustClassFlags(long flags) {
3171 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3172 if ((flags & ACC_MODULE) != 0) {
3173 flags &= ~ACC_MODULE;
3174 flags |= MODULE;
3175 }
3176 if ((flags & ACC_IDENTITY) != 0 || (majorVersion < V66.major && (flags & INTERFACE) == 0)) {
3177 flags |= IDENTITY_TYPE;
3178 } else if ((flags & INTERFACE) == 0 && allowValueClasses && previewClassFile && majorVersion >= V66.major) {
3179 flags |= VALUE_CLASS;
3180 }
3181 flags &= ~ACC_IDENTITY; // ACC_IDENTITY and SYNCHRONIZED bits overloaded
3182 return flags;
3183 }
3184
3185 /**
3186 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
3187 * The attribute is only the last component of the original filename, so is unlikely
3188 * to be valid as is, so operations other than those to access the name throw
3189 * UnsupportedOperationException
3190 */
3191 private static class SourceFileObject implements JavaFileObject {
3192
3193 /** The file's name.
3194 */
3195 private final Name name;
3196
3197 public SourceFileObject(Name name) {
3198 this.name = name;
3199 }
3200
3201 @Override @DefinedBy(Api.COMPILER)
3202 public URI toUri() {
3203 try {
3204 return new URI(null, name.toString(), null);
3205 } catch (URISyntaxException e) {
3206 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
3207 }
3208 }
3209
3210 @Override @DefinedBy(Api.COMPILER)
3211 public String getName() {
3212 return name.toString();
3213 }
3214
3215 @Override @DefinedBy(Api.COMPILER)
3216 public JavaFileObject.Kind getKind() {
3217 return BaseFileManager.getKind(getName());
3218 }
3219
3220 @Override @DefinedBy(Api.COMPILER)
3221 public InputStream openInputStream() {
3222 throw new UnsupportedOperationException();
3223 }
3224
3225 @Override @DefinedBy(Api.COMPILER)
3226 public OutputStream openOutputStream() {
3227 throw new UnsupportedOperationException();
3228 }
3229
3230 @Override @DefinedBy(Api.COMPILER)
3231 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
3232 throw new UnsupportedOperationException();
3233 }
3234
3235 @Override @DefinedBy(Api.COMPILER)
3236 public Reader openReader(boolean ignoreEncodingErrors) {
3237 throw new UnsupportedOperationException();
3238 }
3239
3240 @Override @DefinedBy(Api.COMPILER)
3241 public Writer openWriter() {
3242 throw new UnsupportedOperationException();
3243 }
3244
3245 @Override @DefinedBy(Api.COMPILER)
3246 public long getLastModified() {
3247 throw new UnsupportedOperationException();
3248 }
3249
3250 @Override @DefinedBy(Api.COMPILER)
3251 public boolean delete() {
3252 throw new UnsupportedOperationException();
3253 }
3254
3255 @Override @DefinedBy(Api.COMPILER)
3256 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
3257 return true; // fail-safe mode
3258 }
3259
3260 @Override @DefinedBy(Api.COMPILER)
3261 public NestingKind getNestingKind() {
3262 return null;
3263 }
3264
3265 @Override @DefinedBy(Api.COMPILER)
3266 public Modifier getAccessLevel() {
3267 return null;
3268 }
3269
3270 /**
3271 * Check if two file objects are equal.
3272 * SourceFileObjects are just placeholder objects for the value of a
3273 * SourceFile attribute, and do not directly represent specific files.
3274 * Two SourceFileObjects are equal if their names are equal.
3275 */
3276 @Override
3277 public boolean equals(Object other) {
3278 if (this == other)
3279 return true;
3280 return (other instanceof SourceFileObject sourceFileObject)
3281 && name.equals(sourceFileObject.name);
3282 }
3283
3284 @Override
3285 public int hashCode() {
3286 return name.hashCode();
3287 }
3288 }
3289
3290 private class CompleterDeproxy implements AnnotationTypeCompleter {
3291 ClassSymbol proxyOn;
3292 CompoundAnnotationProxy target;
3293 CompoundAnnotationProxy repeatable;
3294
3295 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
3296 CompoundAnnotationProxy repeatable)
3297 {
3298 this.proxyOn = c;
3299 this.target = target;
3300 this.repeatable = repeatable;
3301 }
3302
3303 @Override
3304 public void complete(ClassSymbol sym) {
3305 Assert.check(proxyOn == sym);
3306 Attribute.Compound theTarget = null, theRepeatable = null;
3307 AnnotationDeproxy deproxy;
3308
3309 try {
3310 if (target != null) {
3311 deproxy = new AnnotationDeproxy(proxyOn);
3312 theTarget = deproxy.deproxyCompound(target);
3313 }
3314
3315 if (repeatable != null) {
3316 deproxy = new AnnotationDeproxy(proxyOn);
3317 theRepeatable = deproxy.deproxyCompound(repeatable);
3318 }
3319 } catch (Exception e) {
3320 throw new CompletionFailure(sym,
3321 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())),
3322 dcfh);
3323 }
3324
3325 sym.getAnnotationTypeMetadata().setTarget(theTarget);
3326 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
3327 }
3328 }
3329
3330 private class ProxyType extends Type {
3331
3332 private final Name name;
3333
3334 public ProxyType(int index) {
3335 super(syms.noSymbol, List.nil());
3336 this.name = poolReader.getName(index);
3337 }
3338
3339 @Override
3340 public TypeTag getTag() {
3341 return TypeTag.NONE;
3342 }
3343
3344 public Type resolve() {
3345 return name.map(ClassReader.this::sigToType);
3346 }
3347
3348 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3349 public String toString() {
3350 return "<ProxyType>";
3351 }
3352
3353 }
3354
3355 private static final class InterimUsesDirective {
3356 public final Name service;
3357
3358 public InterimUsesDirective(Name service) {
3359 this.service = service;
3360 }
3361
3362 }
3363
3364 private static final class InterimProvidesDirective {
3365 public final Name service;
3366 public final List<Name> impls;
3367
3368 public InterimProvidesDirective(Name service, List<Name> impls) {
3369 this.service = service;
3370 this.impls = impls;
3371 }
3372
3373 }
3374
3375 private final class UsesProvidesCompleter implements Completer {
3376 private final ModuleSymbol currentModule;
3377 private final List<InterimUsesDirective> interimUsesCopy;
3378 private final List<InterimProvidesDirective> interimProvidesCopy;
3379
3380 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3381 this.currentModule = currentModule;
3382 this.interimUsesCopy = interimUsesCopy;
3383 this.interimProvidesCopy = interimProvidesCopy;
3384 }
3385
3386 @Override
3387 public void complete(Symbol sym) throws CompletionFailure {
3388 ListBuffer<Directive> directives = new ListBuffer<>();
3389 directives.addAll(currentModule.directives);
3390 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3391 for (InterimUsesDirective interim : interimUsesCopy) {
3392 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3393 uses.add(d);
3394 directives.add(d);
3395 }
3396 currentModule.uses = uses.toList();
3397 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3398 for (InterimProvidesDirective interim : interimProvidesCopy) {
3399 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3400 for (Name impl : interim.impls) {
3401 impls.append(syms.enterClass(currentModule, impl));
3402 }
3403 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3404 impls.toList());
3405 provides.add(d);
3406 directives.add(d);
3407 }
3408 currentModule.provides = provides.toList();
3409 currentModule.directives = directives.toList();
3410 }
3411 }
3412 }