1 /*
2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.nio.file.ClosedFileSystemException;
33 import java.util.Arrays;
34 import java.util.EnumSet;
35 import java.util.HashMap;
36 import java.util.HashSet;
37 import java.util.Map;
38 import java.util.Set;
39 import java.util.function.IntFunction;
40 import java.util.function.Predicate;
41 import java.util.stream.IntStream;
42
43 import javax.lang.model.element.Modifier;
44 import javax.lang.model.element.NestingKind;
45 import javax.tools.JavaFileManager;
46 import javax.tools.JavaFileObject;
47
48 import com.sun.tools.javac.code.Source;
49 import com.sun.tools.javac.code.Source.Feature;
50 import com.sun.tools.javac.comp.Annotate;
51 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
52 import com.sun.tools.javac.code.*;
53 import com.sun.tools.javac.code.Directive.*;
54 import com.sun.tools.javac.code.Lint.LintCategory;
55 import com.sun.tools.javac.code.Scope.WriteableScope;
56 import com.sun.tools.javac.code.Symbol.*;
57 import com.sun.tools.javac.code.Symtab;
58 import com.sun.tools.javac.code.Type.*;
59 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
60 import com.sun.tools.javac.file.BaseFileManager;
61 import com.sun.tools.javac.file.PathFileObject;
62 import com.sun.tools.javac.jvm.ClassFile.Version;
63 import com.sun.tools.javac.jvm.PoolConstant.NameAndType;
64 import com.sun.tools.javac.main.Option;
65 import com.sun.tools.javac.resources.CompilerProperties;
66 import com.sun.tools.javac.resources.CompilerProperties.Errors;
67 import com.sun.tools.javac.resources.CompilerProperties.Fragments;
68 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
69 import com.sun.tools.javac.tree.JCTree;
70 import com.sun.tools.javac.util.*;
71 import com.sun.tools.javac.util.ByteBuffer.UnderflowException;
72 import com.sun.tools.javac.util.DefinedBy.Api;
73 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
74 import com.sun.tools.javac.util.JCDiagnostic.Fragment;
75
76 import static com.sun.tools.javac.code.Flags.*;
77 import static com.sun.tools.javac.code.Kinds.Kind.*;
78
79 import com.sun.tools.javac.code.Scope.LookupKind;
80
81 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;
82 import static com.sun.tools.javac.code.TypeTag.ARRAY;
83 import static com.sun.tools.javac.code.TypeTag.CLASS;
84 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
85 import static com.sun.tools.javac.jvm.ClassFile.*;
86 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
87
88 import static com.sun.tools.javac.main.Option.PARAMETERS;
89
90 /** This class provides operations to read a classfile into an internal
91 * representation. The internal representation is anchored in a
92 * ClassSymbol which contains in its scope symbol representations
93 * for all other definitions in the classfile. Top-level Classes themselves
94 * appear as members of the scopes of PackageSymbols.
95 *
96 * <p><b>This is NOT part of any supported API.
97 * If you write code that depends on this, you do so at your own risk.
98 * This code and its internal interfaces are subject to change or
99 * deletion without notice.</b>
100 */
101 public class ClassReader {
102 /** The context key for the class reader. */
103 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
104
105 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
106
107 private final Annotate annotate;
108
109 /** Switch: verbose output.
110 */
111 boolean verbose;
112
113 /** Switch: allow modules.
114 */
115 boolean allowModules;
116
117 /** Switch: allow value classes.
118 */
119 boolean allowValueClasses;
120
121 /** Switch: allow sealed
122 */
123 boolean allowSealedTypes;
124
125 /** Switch: allow records
126 */
127 boolean allowRecords;
128
129 /** Lint option: warn about classfile issues
130 */
131 boolean lintClassfile;
132
133 /** Switch: warn (instead of error) on illegal UTF-8
134 */
135 boolean warnOnIllegalUtf8;
136
137 /** Switch: preserve parameter names from the variable table.
138 */
139 public boolean saveParameterNames;
140
141 /**
142 * The currently selected profile.
143 */
144 public final Profile profile;
145
146 /** The log to use for verbose output
147 */
148 final Log log;
149
150 /** The symbol table. */
151 Symtab syms;
152
153 Types types;
154
155 /** The name table. */
156 final Names names;
157
158 /** Access to files
159 */
160 private final JavaFileManager fileManager;
161
162 /** Factory for diagnostics
163 */
164 JCDiagnostic.Factory diagFactory;
165
166 DeferredCompletionFailureHandler dcfh;
167
168 /**
169 * Support for preview language features.
170 */
171 Preview preview;
172
173 /** The current scope where type variables are entered.
174 */
175 protected WriteableScope typevars;
176
177 private List<InterimUsesDirective> interimUses = List.nil();
178 private List<InterimProvidesDirective> interimProvides = List.nil();
179
180 /** The path name of the class file currently being read.
181 */
182 protected JavaFileObject currentClassFile = null;
183
184 /** The class or method currently being read.
185 */
186 protected Symbol currentOwner = null;
187
188 /** The module containing the class currently being read.
189 */
190 protected ModuleSymbol currentModule = null;
191
192 /** The buffer containing the currently read class file.
193 */
194 ByteBuffer buf = new ByteBuffer(INITIAL_BUFFER_SIZE);
195
196 /** The current input pointer.
197 */
198 protected int bp;
199
200 /** The pool reader.
201 */
202 PoolReader poolReader;
203
204 /** The major version number of the class file being read. */
205 int majorVersion;
206 /** The minor version number of the class file being read. */
207 int minorVersion;
208
209 /** UTF-8 validation level */
210 Convert.Validation utf8validation;
211
212 /** A table to hold the constant pool indices for method parameter
213 * names, as given in LocalVariableTable attributes.
214 */
215 int[] parameterNameIndicesLvt;
216
217 /**
218 * A table to hold the constant pool indices for method parameter
219 * names, as given in the MethodParameters attribute.
220 */
221 int[] parameterNameIndicesMp;
222
223 /**
224 * A table to hold the access flags of the method parameters.
225 */
226 int[] parameterAccessFlags;
227
228 /**
229 * A table to hold the access flags of the method parameters,
230 * for all parameters including synthetic and mandated ones.
231 */
232 int[] allParameterAccessFlags;
233
234 /**
235 * A table to hold annotations for method parameters.
236 */
237 ParameterAnnotations[] parameterAnnotations;
238
239 /**
240 * A holder for parameter annotations.
241 */
242 static class ParameterAnnotations {
243 List<CompoundAnnotationProxy> proxies;
244
245 void add(List<CompoundAnnotationProxy> newAnnotations) {
246 if (proxies == null) {
247 proxies = newAnnotations;
248 } else {
249 proxies = proxies.prependList(newAnnotations);
250 }
251 }
252 }
253
254 /**
255 * The set of attribute names for which warnings have been generated for the current class
256 */
257 Set<Name> warnedAttrs = new HashSet<>();
258
259 /**
260 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
261 * {@code @Target}
262 */
263 CompoundAnnotationProxy target;
264
265 /**
266 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with
267 * {@code @Repeatable}
268 */
269 CompoundAnnotationProxy repeatable;
270
271 /** Get the ClassReader instance for this invocation. */
272 public static ClassReader instance(Context context) {
273 ClassReader instance = context.get(classReaderKey);
274 if (instance == null)
275 instance = new ClassReader(context);
276 return instance;
277 }
278
279 /** Construct a new class reader. */
280 @SuppressWarnings("this-escape")
281 protected ClassReader(Context context) {
282 context.put(classReaderKey, this);
283 annotate = Annotate.instance(context);
284 names = Names.instance(context);
285 syms = Symtab.instance(context);
286 types = Types.instance(context);
287 fileManager = context.get(JavaFileManager.class);
288 if (fileManager == null)
289 throw new AssertionError("FileManager initialization error");
290 diagFactory = JCDiagnostic.Factory.instance(context);
291 dcfh = DeferredCompletionFailureHandler.instance(context);
292
293 log = Log.instance(context);
294
295 Options options = Options.instance(context);
296 verbose = options.isSet(Option.VERBOSE);
297
298 Source source = Source.instance(context);
299 preview = Preview.instance(context);
300 allowModules = Feature.MODULES.allowedInSource(source);
301 allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) &&
302 Feature.VALUE_CLASSES.allowedInSource(source);
303 allowRecords = Feature.RECORDS.allowedInSource(source);
304 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source);
305 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source);
306
307 saveParameterNames = options.isSet(PARAMETERS);
308
309 profile = Profile.instance(context);
310
311 typevars = WriteableScope.create(syms.noSymbol);
312
313 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
314
315 initAttributeReaders();
316 }
317
318 /** Add member to class unless it is synthetic.
319 */
320 private void enterMember(ClassSymbol c, Symbol sym) {
321 // Synthetic members are not entered -- reason lost to history (optimization?).
322 // Lambda methods must be entered because they may have inner classes (which reference them)
323 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
324 c.members_field.enter(sym);
325 }
326
327 /* **********************************************************************
328 * Error Diagnoses
329 ***********************************************************************/
330
331 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
332 return badClassFile(diagFactory.fragment(key, args));
333 }
334
335 public ClassFinder.BadClassFile badClassFile(Fragment fragment) {
336 return badClassFile(diagFactory.fragment(fragment));
337 }
338
339 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) {
340 return new ClassFinder.BadClassFile (
341 currentOwner.enclClass(),
342 currentClassFile,
343 diagnostic,
344 diagFactory,
345 dcfh);
346 }
347
348 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) {
349 return new ClassFinder.BadEnclosingMethodAttr (
350 currentOwner.enclClass(),
351 currentClassFile,
352 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)),
353 diagFactory,
354 dcfh);
355 }
356
357 /* **********************************************************************
358 * Buffer Access
359 ***********************************************************************/
360
361 /** Read a character.
362 */
363 char nextChar() {
364 char res;
365 try {
366 res = buf.getChar(bp);
367 } catch (UnderflowException e) {
368 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
369 }
370 bp += 2;
371 return res;
372 }
373
374 /** Read a byte.
375 */
376 int nextByte() {
377 try {
378 return buf.getByte(bp++) & 0xFF;
379 } catch (UnderflowException e) {
380 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
381 }
382 }
383
384 /** Read an integer.
385 */
386 int nextInt() {
387 int res;
388 try {
389 res = buf.getInt(bp);
390 } catch (UnderflowException e) {
391 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
392 }
393 bp += 4;
394 return res;
395 }
396
397 /* **********************************************************************
398 * Constant Pool Access
399 ***********************************************************************/
400
401 /** Read module_flags.
402 */
403 Set<ModuleFlags> readModuleFlags(int flags) {
404 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
405 for (ModuleFlags f : ModuleFlags.values()) {
406 if ((flags & f.value) != 0)
407 set.add(f);
408 }
409 return set;
410 }
411
412 /** Read resolution_flags.
413 */
414 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
415 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
416 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
417 if ((flags & f.value) != 0)
418 set.add(f);
419 }
420 return set;
421 }
422
423 /** Read exports_flags.
424 */
425 Set<ExportsFlag> readExportsFlags(int flags) {
426 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
427 for (ExportsFlag f: ExportsFlag.values()) {
428 if ((flags & f.value) != 0)
429 set.add(f);
430 }
431 return set;
432 }
433
434 /** Read opens_flags.
435 */
436 Set<OpensFlag> readOpensFlags(int flags) {
437 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
438 for (OpensFlag f: OpensFlag.values()) {
439 if ((flags & f.value) != 0)
440 set.add(f);
441 }
442 return set;
443 }
444
445 /** Read requires_flags.
446 */
447 Set<RequiresFlag> readRequiresFlags(int flags) {
448 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
449 for (RequiresFlag f: RequiresFlag.values()) {
450 if ((flags & f.value) != 0)
451 set.add(f);
452 }
453 return set;
454 }
455
456 /* **********************************************************************
457 * Reading Types
458 ***********************************************************************/
459
460 /** The unread portion of the currently read type is
461 * signature[sigp..siglimit-1].
462 */
463 byte[] signature;
464 int sigp;
465 int siglimit;
466 boolean sigEnterPhase = false;
467
468 /** Convert signature to type, where signature is a byte array segment.
469 */
470 Type sigToType(byte[] sig, int offset, int len) {
471 signature = sig;
472 sigp = offset;
473 siglimit = offset + len;
474 return sigToType();
475 }
476
477 /** Convert signature to type, where signature is implicit.
478 */
479 Type sigToType() {
480 switch ((char) signature[sigp]) {
481 case 'T':
482 sigp++;
483 int start = sigp;
484 while (signature[sigp] != ';') sigp++;
485 sigp++;
486 return sigEnterPhase
487 ? Type.noType
488 : findTypeVar(readName(signature, start, sigp - 1 - start));
489 case '+': {
490 sigp++;
491 Type t = sigToType();
492 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
493 }
494 case '*':
495 sigp++;
496 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
497 syms.boundClass);
498 case '-': {
499 sigp++;
500 Type t = sigToType();
501 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
502 }
503 case 'B':
504 sigp++;
505 return syms.byteType;
506 case 'C':
507 sigp++;
508 return syms.charType;
509 case 'D':
510 sigp++;
511 return syms.doubleType;
512 case 'F':
513 sigp++;
514 return syms.floatType;
515 case 'I':
516 sigp++;
517 return syms.intType;
518 case 'J':
519 sigp++;
520 return syms.longType;
521 case 'L':
522 {
523 // int oldsigp = sigp;
524 Type t = classSigToType();
525 if (sigp < siglimit && signature[sigp] == '.')
526 throw badClassFile("deprecated inner class signature syntax " +
527 "(please recompile from source)");
528 /*
529 System.err.println(" decoded " +
530 new String(signature, oldsigp, sigp-oldsigp) +
531 " => " + t + " outer " + t.outer());
532 */
533 return t;
534 }
535 case 'S':
536 sigp++;
537 return syms.shortType;
538 case 'V':
539 sigp++;
540 return syms.voidType;
541 case 'Z':
542 sigp++;
543 return syms.booleanType;
544 case '[':
545 sigp++;
546 return new ArrayType(sigToType(), syms.arrayClass);
547 case '(':
548 sigp++;
549 List<Type> argtypes = sigToTypes(')');
550 Type restype = sigToType();
551 List<Type> thrown = List.nil();
552 while (sigp < siglimit && signature[sigp] == '^') {
553 sigp++;
554 thrown = thrown.prepend(sigToType());
555 }
556 // if there is a typevar in the throws clause we should state it.
557 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
558 if (l.head.hasTag(TYPEVAR)) {
559 l.head.tsym.flags_field |= THROWS;
560 }
561 }
562 return new MethodType(argtypes,
563 restype,
564 thrown.reverse(),
565 syms.methodClass);
566 case '<':
567 typevars = typevars.dup(currentOwner);
568 Type poly = new ForAll(sigToTypeParams(), sigToType());
569 typevars = typevars.leave();
570 return poly;
571 default:
572 throw badClassFile("bad.signature", quoteBadSignature());
573 }
574 }
575
576 byte[] signatureBuffer = new byte[0];
577 int sbp = 0;
578 /** Convert class signature to type, where signature is implicit.
579 */
580 Type classSigToType() {
581 if (signature[sigp] != 'L')
582 throw badClassFile("bad.class.signature", quoteBadSignature());
583 sigp++;
584 Type outer = Type.noType;
585 int startSbp = sbp;
586
587 while (true) {
588 final byte c = signature[sigp++];
589 switch (c) {
590
591 case ';': { // end
592 ClassSymbol t = enterClass(readName(signatureBuffer,
593 startSbp,
594 sbp - startSbp));
595
596 try {
597 if (outer == Type.noType) {
598 ClassType et = (ClassType) t.erasure(types);
599 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata());
600 }
601 return new ClassType(outer, List.nil(), t, List.nil());
602 } finally {
603 sbp = startSbp;
604 }
605 }
606
607 case '<': // generic arguments
608 ClassSymbol t = enterClass(readName(signatureBuffer,
609 startSbp,
610 sbp - startSbp));
611 List<Type> actuals = sigToTypes('>');
612 List<Type> formals = ((ClassType)t.type.tsym.type).typarams_field;
613 if (formals != null) {
614 if (actuals.isEmpty())
615 actuals = formals;
616 }
617 /* actualsCp is final as it will be captured by the inner class below. We could avoid defining
618 * this additional local variable and depend on field ClassType::typarams_field which `actuals` is
619 * assigned to but then we would have a dependendy on the internal representation of ClassType which
620 * could change in the future
621 */
622 final List<Type> actualsCp = actuals;
623 outer = new ClassType(outer, actuals, t, List.nil()) {
624 boolean completed = false;
625 boolean typeArgsSet = false;
626 @Override @DefinedBy(Api.LANGUAGE_MODEL)
627 public Type getEnclosingType() {
628 if (!completed) {
629 completed = true;
630 tsym.apiComplete();
631 Type enclosingType = tsym.type.getEnclosingType();
632 if (enclosingType != Type.noType) {
633 List<Type> typeArgs =
634 super.getEnclosingType().allparams();
635 List<Type> typeParams =
636 enclosingType.allparams();
637 if (typeParams.length() != typeArgs.length()) {
638 // no "rare" types
639 super.setEnclosingType(types.erasure(enclosingType));
640 } else {
641 super.setEnclosingType(types.subst(enclosingType,
642 typeParams,
643 typeArgs));
644 }
645 } else {
646 super.setEnclosingType(Type.noType);
647 }
648 }
649 return super.getEnclosingType();
650 }
651 @Override
652 public void setEnclosingType(Type outer) {
653 throw new UnsupportedOperationException();
654 }
655
656 @Override
657 public List<Type> getTypeArguments() {
658 if (!typeArgsSet) {
659 typeArgsSet = true;
660 List<Type> formalsCp = ((ClassType)t.type.tsym.type).typarams_field;
661 if (formalsCp != null && !formalsCp.isEmpty()) {
662 if (actualsCp.length() == formalsCp.length()) {
663 List<Type> a = actualsCp;
664 List<Type> f = formalsCp;
665 while (a.nonEmpty()) {
666 a.head = a.head.withTypeVar(f.head);
667 a = a.tail;
668 f = f.tail;
669 }
670 }
671 }
672 }
673 return super.getTypeArguments();
674 }
675 };
676 switch (signature[sigp++]) {
677 case ';':
678 if (sigp < siglimit && signature[sigp] == '.') {
679 // support old-style GJC signatures
680 // The signature produced was
681 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
682 // rather than say
683 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
684 // so we skip past ".Lfoo/Outer$"
685 sigp += (sbp - startSbp) + // "foo/Outer"
686 3; // ".L" and "$"
687 signatureBuffer[sbp++] = (byte)'$';
688 break;
689 } else {
690 sbp = startSbp;
691 return outer;
692 }
693 case '.':
694 signatureBuffer[sbp++] = (byte)'$';
695 break;
696 default:
697 throw new AssertionError(signature[sigp-1]);
698 }
699 continue;
700
701 case '.':
702 //we have seen an enclosing non-generic class
703 if (outer != Type.noType) {
704 t = enterClass(readName(signatureBuffer,
705 startSbp,
706 sbp - startSbp));
707 outer = new ClassType(outer, List.nil(), t, List.nil());
708 }
709 signatureBuffer[sbp++] = (byte)'$';
710 continue;
711 case '/':
712 signatureBuffer[sbp++] = (byte)'.';
713 continue;
714 default:
715 signatureBuffer[sbp++] = c;
716 continue;
717 }
718 }
719 }
720
721 /** Quote a bogus signature for display inside an error message.
722 */
723 String quoteBadSignature() {
724 String sigString;
725 try {
726 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE);
727 } catch (InvalidUtfException e) {
728 throw new AssertionError(e);
729 }
730 if (sigString.length() > 32)
731 sigString = sigString.substring(0, 32) + "...";
732 return "\"" + sigString + "\"";
733 }
734
735 /** Convert (implicit) signature to list of types
736 * until `terminator' is encountered.
737 */
738 List<Type> sigToTypes(char terminator) {
739 List<Type> head = List.of(null);
740 List<Type> tail = head;
741 while (signature[sigp] != terminator)
742 tail = tail.setTail(List.of(sigToType()));
743 sigp++;
744 return head.tail;
745 }
746
747 /** Convert signature to type parameters, where signature is a byte
748 * array segment.
749 */
750 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
751 signature = sig;
752 sigp = offset;
753 siglimit = offset + len;
754 return sigToTypeParams();
755 }
756
757 /** Convert signature to type parameters, where signature is implicit.
758 */
759 List<Type> sigToTypeParams() {
760 List<Type> tvars = List.nil();
761 if (signature[sigp] == '<') {
762 sigp++;
763 int start = sigp;
764 sigEnterPhase = true;
765 while (signature[sigp] != '>')
766 tvars = tvars.prepend(sigToTypeParam());
767 sigEnterPhase = false;
768 sigp = start;
769 while (signature[sigp] != '>')
770 sigToTypeParam();
771 sigp++;
772 }
773 return tvars.reverse();
774 }
775
776 /** Convert (implicit) signature to type parameter.
777 */
778 Type sigToTypeParam() {
779 int start = sigp;
780 while (signature[sigp] != ':') sigp++;
781 Name name = readName(signature, start, sigp - start);
782 TypeVar tvar;
783 if (sigEnterPhase) {
784 tvar = new TypeVar(name, currentOwner, syms.botType);
785 typevars.enter(tvar.tsym);
786 } else {
787 tvar = (TypeVar)findTypeVar(name);
788 }
789 List<Type> bounds = List.nil();
790 boolean allInterfaces = false;
791 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
792 sigp++;
793 allInterfaces = true;
794 }
795 while (signature[sigp] == ':') {
796 sigp++;
797 bounds = bounds.prepend(sigToType());
798 }
799 if (!sigEnterPhase) {
800 types.setBounds(tvar, bounds.reverse(), allInterfaces);
801 }
802 return tvar;
803 }
804
805 /** Find type variable with given name in `typevars' scope.
806 */
807 Type findTypeVar(Name name) {
808 Symbol s = typevars.findFirst(name);
809 if (s != null) {
810 return s.type;
811 } else {
812 if (readingClassAttr) {
813 // While reading the class attribute, the supertypes
814 // might refer to a type variable from an enclosing element
815 // (method or class).
816 // If the type variable is defined in the enclosing class,
817 // we can actually find it in
818 // currentOwner.owner.type.getTypeArguments()
819 // However, until we have read the enclosing method attribute
820 // we don't know for sure if this owner is correct. It could
821 // be a method and there is no way to tell before reading the
822 // enclosing method attribute.
823 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
824 missingTypeVariables = missingTypeVariables.prepend(t);
825 // System.err.println("Missing type var " + name);
826 return t;
827 }
828 throw badClassFile("undecl.type.var", name);
829 }
830 }
831
832 private Name readName(byte[] buf, int off, int len) {
833 try {
834 return names.fromUtf(buf, off, len, utf8validation);
835 } catch (InvalidUtfException e) {
836 if (warnOnIllegalUtf8) {
837 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
838 Fragments.BadUtf8ByteSequenceAt(sigp)));
839 return names.fromUtfLax(buf, off, len);
840 }
841 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp));
842 }
843 }
844
845 /* **********************************************************************
846 * Reading Attributes
847 ***********************************************************************/
848
849 protected enum AttributeKind { CLASS, MEMBER }
850
851 protected abstract class AttributeReader {
852 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
853 this.name = name;
854 this.version = version;
855 this.kinds = kinds;
856 }
857
858 protected boolean accepts(AttributeKind kind) {
859 if (kinds.contains(kind)) {
860 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
861 return true;
862
863 if (lintClassfile && !warnedAttrs.contains(name)) {
864 JavaFileObject prev = log.useSource(currentClassFile);
865 try {
866 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null,
867 Warnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion));
868 } finally {
869 log.useSource(prev);
870 }
871 warnedAttrs.add(name);
872 }
873 }
874 return false;
875 }
876
877 protected abstract void read(Symbol sym, int attrLen);
878
879 protected final Name name;
880 protected final ClassFile.Version version;
881 protected final Set<AttributeKind> kinds;
882 }
883
884 protected Set<AttributeKind> CLASS_ATTRIBUTE =
885 EnumSet.of(AttributeKind.CLASS);
886 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
887 EnumSet.of(AttributeKind.MEMBER);
888 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
889 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
890
891 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
892
893 private void initAttributeReaders() {
894 AttributeReader[] readers = {
895 // v45.3 attributes
896
897 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
898 protected void read(Symbol sym, int attrLen) {
899 if (saveParameterNames)
900 ((MethodSymbol)sym).code = readCode(sym);
901 else
902 bp = bp + attrLen;
903 }
904 },
905
906 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
907 protected void read(Symbol sym, int attrLen) {
908 Object v = poolReader.getConstant(nextChar());
909 // Ignore ConstantValue attribute if field not final.
910 if ((sym.flags() & FINAL) == 0) {
911 return;
912 }
913 VarSymbol var = (VarSymbol) sym;
914 switch (var.type.getTag()) {
915 case BOOLEAN:
916 case BYTE:
917 case CHAR:
918 case SHORT:
919 case INT:
920 checkType(var, Integer.class, v);
921 break;
922 case LONG:
923 checkType(var, Long.class, v);
924 break;
925 case FLOAT:
926 checkType(var, Float.class, v);
927 break;
928 case DOUBLE:
929 checkType(var, Double.class, v);
930 break;
931 case CLASS:
932 if (var.type.tsym == syms.stringType.tsym) {
933 checkType(var, String.class, v);
934 } else {
935 throw badClassFile("bad.constant.value.type", var.type);
936 }
937 break;
938 default:
939 // ignore ConstantValue attribute if type is not primitive or String
940 return;
941 }
942 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) {
943 throw badClassFile("bad.constant.range", v, var, var.type);
944 }
945 var.setData(v);
946 }
947
948 void checkType(Symbol var, Class<?> clazz, Object value) {
949 if (!clazz.isInstance(value)) {
950 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName());
951 }
952 }
953 },
954
955 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
956 protected void read(Symbol sym, int attrLen) {
957 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
958
959 s.flags_field |= DEPRECATED;
960 }
961 },
962
963 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
964 protected void read(Symbol sym, int attrLen) {
965 int nexceptions = nextChar();
966 List<Type> thrown = List.nil();
967 for (int j = 0; j < nexceptions; j++)
968 thrown = thrown.prepend(poolReader.getClass(nextChar()).type);
969 if (sym.type.getThrownTypes().isEmpty())
970 sym.type.asMethodType().thrown = thrown.reverse();
971 }
972 },
973
974 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
975 protected void read(Symbol sym, int attrLen) {
976 ClassSymbol c = (ClassSymbol) sym;
977 if (currentModule.module_info == c) {
978 //prevent entering the classes too soon:
979 skipInnerClasses();
980 } else {
981 readInnerClasses(c);
982 }
983 }
984 },
985
986 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
987 protected void read(Symbol sym, int attrLen) {
988 int newbp = bp + attrLen;
989 if (saveParameterNames) {
990 // Pick up parameter names from the variable table.
991 // Parameter names are not explicitly identified as such,
992 // but all parameter name entries in the LocalVariableTable
993 // have a start_pc of 0. Therefore, we record the name
994 // indices of all slots with a start_pc of zero in the
995 // parameterNameIndices array.
996 // Note that this implicitly honors the JVMS spec that
997 // there may be more than one LocalVariableTable, and that
998 // there is no specified ordering for the entries.
999 int numEntries = nextChar();
1000 for (int i = 0; i < numEntries; i++) {
1001 int start_pc = nextChar();
1002 int length = nextChar();
1003 int nameIndex = nextChar();
1004 int sigIndex = nextChar();
1005 int register = nextChar();
1006 if (start_pc == 0) {
1007 // ensure array large enough
1008 if (register >= parameterNameIndicesLvt.length) {
1009 int newSize =
1010 Math.max(register + 1, parameterNameIndicesLvt.length + 8);
1011 parameterNameIndicesLvt =
1012 Arrays.copyOf(parameterNameIndicesLvt, newSize);
1013 }
1014 parameterNameIndicesLvt[register] = nameIndex;
1015 }
1016 }
1017 }
1018 bp = newbp;
1019 }
1020 },
1021
1022 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1023 protected void read(Symbol sym, int attrLen) {
1024 ClassSymbol c = (ClassSymbol) sym;
1025 Name n = poolReader.getName(nextChar());
1026 c.sourcefile = new SourceFileObject(n);
1027 // If the class is a toplevel class, originating from a Java source file,
1028 // but the class name does not match the file name, then it is
1029 // an auxiliary class.
1030 String sn = n.toString();
1031 if (c.owner.kind == PCK &&
1032 sn.endsWith(".java") &&
1033 !sn.equals(c.name.toString()+".java")) {
1034 c.flags_field |= AUXILIARY;
1035 }
1036 }
1037 },
1038
1039 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1040 protected void read(Symbol sym, int attrLen) {
1041 sym.flags_field |= SYNTHETIC;
1042 }
1043 },
1044
1045 // standard v49 attributes
1046
1047 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1048 protected void read(Symbol sym, int attrLen) {
1049 int newbp = bp + attrLen;
1050 readEnclosingMethodAttr(sym);
1051 bp = newbp;
1052 }
1053 },
1054
1055 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1056 protected void read(Symbol sym, int attrLen) {
1057 if (sym.kind == TYP) {
1058 ClassSymbol c = (ClassSymbol) sym;
1059 readingClassAttr = true;
1060 try {
1061 ClassType ct1 = (ClassType)c.type;
1062 Assert.check(c == currentOwner);
1063 ct1.typarams_field = poolReader.getName(nextChar())
1064 .map(ClassReader.this::sigToTypeParams);
1065 ct1.supertype_field = sigToType();
1066 ListBuffer<Type> is = new ListBuffer<>();
1067 while (sigp != siglimit) is.append(sigToType());
1068 ct1.interfaces_field = is.toList();
1069 } finally {
1070 readingClassAttr = false;
1071 }
1072 } else {
1073 List<Type> thrown = sym.type.getThrownTypes();
1074 sym.type = poolReader.getType(nextChar());
1075 //- System.err.println(" # " + sym.type);
1076 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1077 sym.type.asMethodType().thrown = thrown;
1078
1079 }
1080 }
1081 },
1082
1083 // v49 annotation attributes
1084
1085 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1086 protected void read(Symbol sym, int attrLen) {
1087 attachAnnotationDefault(sym);
1088 }
1089 },
1090
1091 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1092 protected void read(Symbol sym, int attrLen) {
1093 attachAnnotations(sym);
1094 }
1095 },
1096
1097 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1098 protected void read(Symbol sym, int attrLen) {
1099 readParameterAnnotations(sym);
1100 }
1101 },
1102
1103 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1104 protected void read(Symbol sym, int attrLen) {
1105 attachAnnotations(sym);
1106 }
1107 },
1108
1109 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1110 protected void read(Symbol sym, int attrLen) {
1111 readParameterAnnotations(sym);
1112 }
1113 },
1114
1115 // additional "legacy" v49 attributes, superseded by flags
1116
1117 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1118 protected void read(Symbol sym, int attrLen) {
1119 sym.flags_field |= ANNOTATION;
1120 }
1121 },
1122
1123 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1124 protected void read(Symbol sym, int attrLen) {
1125 sym.flags_field |= BRIDGE;
1126 }
1127 },
1128
1129 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1130 protected void read(Symbol sym, int attrLen) {
1131 sym.flags_field |= ENUM;
1132 }
1133 },
1134
1135 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1136 protected void read(Symbol sym, int attrLen) {
1137 sym.flags_field |= VARARGS;
1138 }
1139 },
1140
1141 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1142 protected void read(Symbol sym, int attrLen) {
1143 attachTypeAnnotations(sym);
1144 }
1145 },
1146
1147 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1148 protected void read(Symbol sym, int attrLen) {
1149 attachTypeAnnotations(sym);
1150 }
1151 },
1152
1153 // The following attributes for a Code attribute are not currently handled
1154 // StackMapTable
1155 // SourceDebugExtension
1156 // LineNumberTable
1157 // LocalVariableTypeTable
1158
1159 // standard v52 attributes
1160
1161 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1162 protected void read(Symbol sym, int attrlen) {
1163 int newbp = bp + attrlen;
1164 if (saveParameterNames) {
1165 int numEntries = nextByte();
1166 allParameterAccessFlags = new int[numEntries];
1167 parameterNameIndicesMp = new int[numEntries];
1168 parameterAccessFlags = new int[numEntries];
1169 int allParamIndex = 0;
1170 int index = 0;
1171 for (int i = 0; i < numEntries; i++) {
1172 int nameIndex = nextChar();
1173 int flags = nextChar();
1174 allParameterAccessFlags[allParamIndex++] = flags;
1175 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) {
1176 continue;
1177 }
1178 parameterNameIndicesMp[index] = nameIndex;
1179 parameterAccessFlags[index] = flags;
1180 index++;
1181 }
1182 }
1183 bp = newbp;
1184 }
1185 },
1186
1187 // standard v53 attributes
1188
1189 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1190 @Override
1191 protected boolean accepts(AttributeKind kind) {
1192 return super.accepts(kind) && allowModules;
1193 }
1194 protected void read(Symbol sym, int attrLen) {
1195 if (sym.kind == TYP && sym.owner.kind == MDL) {
1196 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1197 ListBuffer<Directive> directives = new ListBuffer<>();
1198
1199 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName);
1200 if (currentModule.name != moduleName) {
1201 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1202 }
1203
1204 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar());
1205 msym.flags.addAll(moduleFlags);
1206 msym.version = optPoolEntry(nextChar(), poolReader::getName, null);
1207
1208 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1209 int nrequires = nextChar();
1210 for (int i = 0; i < nrequires; i++) {
1211 ModuleSymbol rsym = poolReader.getModule(nextChar());
1212 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1213 if (rsym == syms.java_base && majorVersion >= V54.major) {
1214 if (flags.contains(RequiresFlag.TRANSITIVE)) {
1215 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE);
1216 }
1217 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1218 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1219 }
1220 }
1221 nextChar(); // skip compiled version
1222 requires.add(new RequiresDirective(rsym, flags));
1223 }
1224 msym.requires = requires.toList();
1225 directives.addAll(msym.requires);
1226
1227 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1228 int nexports = nextChar();
1229 for (int i = 0; i < nexports; i++) {
1230 PackageSymbol p = poolReader.getPackage(nextChar());
1231 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1232 int nto = nextChar();
1233 List<ModuleSymbol> to;
1234 if (nto == 0) {
1235 to = null;
1236 } else {
1237 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1238 for (int t = 0; t < nto; t++)
1239 lb.append(poolReader.getModule(nextChar()));
1240 to = lb.toList();
1241 }
1242 exports.add(new ExportsDirective(p, to, flags));
1243 }
1244 msym.exports = exports.toList();
1245 directives.addAll(msym.exports);
1246 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1247 int nopens = nextChar();
1248 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1249 throw badClassFile("module.non.zero.opens", currentModule.name);
1250 }
1251 for (int i = 0; i < nopens; i++) {
1252 PackageSymbol p = poolReader.getPackage(nextChar());
1253 Set<OpensFlag> flags = readOpensFlags(nextChar());
1254 int nto = nextChar();
1255 List<ModuleSymbol> to;
1256 if (nto == 0) {
1257 to = null;
1258 } else {
1259 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1260 for (int t = 0; t < nto; t++)
1261 lb.append(poolReader.getModule(nextChar()));
1262 to = lb.toList();
1263 }
1264 opens.add(new OpensDirective(p, to, flags));
1265 }
1266 msym.opens = opens.toList();
1267 directives.addAll(msym.opens);
1268
1269 msym.directives = directives.toList();
1270
1271 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1272 int nuses = nextChar();
1273 for (int i = 0; i < nuses; i++) {
1274 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1275 uses.add(new InterimUsesDirective(srvc));
1276 }
1277 interimUses = uses.toList();
1278
1279 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1280 int nprovides = nextChar();
1281 for (int p = 0; p < nprovides; p++) {
1282 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1283 int nimpls = nextChar();
1284 ListBuffer<Name> impls = new ListBuffer<>();
1285 for (int i = 0; i < nimpls; i++) {
1286 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper));
1287 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1288 }
1289 }
1290 interimProvides = provides.toList();
1291 }
1292 }
1293
1294 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException {
1295 byte[] buf = ClassFile.internalize(arr, offset, length);
1296 try {
1297 return names.fromUtf(buf, 0, buf.length, utf8validation);
1298 } catch (InvalidUtfException e) {
1299 if (warnOnIllegalUtf8) {
1300 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
1301 Fragments.BadUtf8ByteSequenceAt(e.getOffset())));
1302 return names.fromUtfLax(buf, 0, buf.length);
1303 }
1304 throw e;
1305 }
1306 }
1307 },
1308
1309 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1310 @Override
1311 protected boolean accepts(AttributeKind kind) {
1312 return super.accepts(kind) && allowModules;
1313 }
1314 protected void read(Symbol sym, int attrLen) {
1315 if (sym.kind == TYP && sym.owner.kind == MDL) {
1316 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1317 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1318 }
1319 }
1320 },
1321
1322 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) {
1323 @Override
1324 protected boolean accepts(AttributeKind kind) {
1325 return super.accepts(kind) && allowRecords;
1326 }
1327 protected void read(Symbol sym, int attrLen) {
1328 if (sym.kind == TYP) {
1329 sym.flags_field |= RECORD;
1330 }
1331 int componentCount = nextChar();
1332 ListBuffer<RecordComponent> components = new ListBuffer<>();
1333 for (int i = 0; i < componentCount; i++) {
1334 Name name = poolReader.getName(nextChar());
1335 Type type = poolReader.getType(nextChar());
1336 RecordComponent c = new RecordComponent(name, type, sym);
1337 readAttrs(c, AttributeKind.MEMBER);
1338 components.add(c);
1339 }
1340 ((ClassSymbol) sym).setRecordComponents(components.toList());
1341 }
1342 },
1343 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) {
1344 @Override
1345 protected boolean accepts(AttributeKind kind) {
1346 return super.accepts(kind) && allowSealedTypes;
1347 }
1348 protected void read(Symbol sym, int attrLen) {
1349 if (sym.kind == TYP) {
1350 ListBuffer<Symbol> subtypes = new ListBuffer<>();
1351 int numberOfPermittedSubtypes = nextChar();
1352 for (int i = 0; i < numberOfPermittedSubtypes; i++) {
1353 subtypes.add(poolReader.getClass(nextChar()));
1354 }
1355 ((ClassSymbol)sym).setPermittedSubclasses(subtypes.toList());
1356 }
1357 }
1358 },
1359 };
1360
1361 for (AttributeReader r: readers)
1362 attributeReaders.put(r.name, r);
1363 }
1364
1365 protected void readEnclosingMethodAttr(Symbol sym) {
1366 // sym is a nested class with an "Enclosing Method" attribute
1367 // remove sym from it's current owners scope and place it in
1368 // the scope specified by the attribute
1369 sym.owner.members().remove(sym);
1370 ClassSymbol self = (ClassSymbol)sym;
1371 ClassSymbol c = poolReader.getClass(nextChar());
1372 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null);
1373
1374 if (c.members_field == null || c.kind != TYP)
1375 throw badClassFile("bad.enclosing.class", self, c);
1376
1377 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1378 if (nt != null && m == null)
1379 throw badEnclosingMethod(self);
1380
1381 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1382 self.owner = m != null ? m : c;
1383 if (self.name.isEmpty())
1384 self.fullname = names.empty;
1385 else
1386 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1387
1388 if (m != null) {
1389 ((ClassType)sym.type).setEnclosingType(m.type);
1390 } else if ((self.flags_field & STATIC) == 0) {
1391 ((ClassType)sym.type).setEnclosingType(c.type);
1392 } else {
1393 ((ClassType)sym.type).setEnclosingType(Type.noType);
1394 }
1395 enterTypevars(self, self.type);
1396 if (!missingTypeVariables.isEmpty()) {
1397 ListBuffer<Type> typeVars = new ListBuffer<>();
1398 for (Type typevar : missingTypeVariables) {
1399 typeVars.append(findTypeVar(typevar.tsym.name));
1400 }
1401 foundTypeVariables = typeVars.toList();
1402 } else {
1403 foundTypeVariables = List.nil();
1404 }
1405 }
1406
1407 // See java.lang.Class
1408 private Name simpleBinaryName(Name self, Name enclosing) {
1409 if (!self.startsWith(enclosing)) {
1410 throw badClassFile("bad.enclosing.method", self);
1411 }
1412
1413 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1414 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1415 throw badClassFile("bad.enclosing.method", self);
1416 int index = 1;
1417 while (index < simpleBinaryName.length() &&
1418 isAsciiDigit(simpleBinaryName.charAt(index)))
1419 index++;
1420 return names.fromString(simpleBinaryName.substring(index));
1421 }
1422
1423 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1424 if (nt == null)
1425 return null;
1426
1427 MethodType type = nt.type.asMethodType();
1428
1429 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1430 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1431 return (MethodSymbol)sym;
1432 }
1433
1434 if (nt.name != names.init)
1435 // not a constructor
1436 return null;
1437 if ((flags & INTERFACE) != 0)
1438 // no enclosing instance
1439 return null;
1440 if (nt.type.getParameterTypes().isEmpty())
1441 // no parameters
1442 return null;
1443
1444 // A constructor of an inner class.
1445 // Remove the first argument (the enclosing instance)
1446 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail,
1447 nt.type.getReturnType(),
1448 nt.type.getThrownTypes(),
1449 syms.methodClass));
1450 // Try searching again
1451 return findMethod(nt, scope, flags);
1452 }
1453
1454 /** Similar to Types.isSameType but avoids completion */
1455 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1456 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1457 .prepend(types.erasure(mt1.getReturnType()));
1458 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1459 while (!types1.isEmpty() && !types2.isEmpty()) {
1460 if (types1.head.tsym != types2.head.tsym)
1461 return false;
1462 types1 = types1.tail;
1463 types2 = types2.tail;
1464 }
1465 return types1.isEmpty() && types2.isEmpty();
1466 }
1467
1468 /**
1469 * Character.isDigit answers <tt>true</tt> to some non-ascii
1470 * digits. This one does not. <b>copied from java.lang.Class</b>
1471 */
1472 private static boolean isAsciiDigit(char c) {
1473 return '0' <= c && c <= '9';
1474 }
1475
1476 /** Read member attributes.
1477 */
1478 void readMemberAttrs(Symbol sym) {
1479 readAttrs(sym, AttributeKind.MEMBER);
1480 }
1481
1482 void readAttrs(Symbol sym, AttributeKind kind) {
1483 char ac = nextChar();
1484 for (int i = 0; i < ac; i++) {
1485 Name attrName = poolReader.getName(nextChar());
1486 int attrLen = nextInt();
1487 AttributeReader r = attributeReaders.get(attrName);
1488 if (r != null && r.accepts(kind))
1489 r.read(sym, attrLen);
1490 else {
1491 bp = bp + attrLen;
1492 }
1493 }
1494 }
1495
1496 private boolean readingClassAttr = false;
1497 private List<Type> missingTypeVariables = List.nil();
1498 private List<Type> foundTypeVariables = List.nil();
1499
1500 /** Read class attributes.
1501 */
1502 void readClassAttrs(ClassSymbol c) {
1503 readAttrs(c, AttributeKind.CLASS);
1504 }
1505
1506 /** Read code block.
1507 */
1508 Code readCode(Symbol owner) {
1509 nextChar(); // max_stack
1510 nextChar(); // max_locals
1511 final int code_length = nextInt();
1512 bp += code_length;
1513 final char exception_table_length = nextChar();
1514 bp += exception_table_length * 8;
1515 readMemberAttrs(owner);
1516 return null;
1517 }
1518
1519 /* **********************************************************************
1520 * Reading Java-language annotations
1521 ***********************************************************************/
1522
1523 /**
1524 * Save annotations.
1525 */
1526 List<CompoundAnnotationProxy> readAnnotations() {
1527 int numAttributes = nextChar();
1528 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1529 for (int i = 0; i < numAttributes; i++) {
1530 annotations.append(readCompoundAnnotation());
1531 }
1532 return annotations.toList();
1533 }
1534
1535 /** Attach annotations.
1536 */
1537 void attachAnnotations(final Symbol sym) {
1538 attachAnnotations(sym, readAnnotations());
1539 }
1540
1541 /**
1542 * Attach annotations.
1543 */
1544 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1545 if (annotations.isEmpty()) {
1546 return;
1547 }
1548 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1549 for (CompoundAnnotationProxy proxy : annotations) {
1550 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName())
1551 sym.flags_field |= PROPRIETARY;
1552 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) {
1553 if (profile != Profile.DEFAULT) {
1554 for (Pair<Name, Attribute> v : proxy.values) {
1555 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) {
1556 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) {
1557 sym.flags_field |= NOT_IN_PROFILE;
1558 }
1559 }
1560 }
1561 }
1562 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) {
1563 sym.flags_field |= PREVIEW_API;
1564 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1565 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) {
1566 Assert.check(sym.kind == TYP);
1567 sym.flags_field |= VALUE_BASED;
1568 } else if (proxy.type.tsym.flatName() == syms.migratedValueClassInternalType.tsym.flatName()) {
1569 Assert.check(sym.kind == TYP);
1570 sym.flags_field |= MIGRATED_VALUE_CLASS;
1571 if (needsValueFlag(sym, sym.flags_field)) {
1572 sym.flags_field |= VALUE_CLASS;
1573 sym.flags_field &= ~IDENTITY_TYPE;
1574 }
1575 } else if (proxy.type.tsym.flatName() == syms.restrictedInternalType.tsym.flatName()) {
1576 Assert.check(sym.kind == MTH);
1577 sym.flags_field |= RESTRICTED;
1578 } else {
1579 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1580 target = proxy;
1581 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1582 repeatable = proxy;
1583 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1584 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1585 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL);
1586 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) {
1587 sym.flags_field |= PREVIEW_API;
1588 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1589 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) {
1590 sym.flags_field |= VALUE_BASED;
1591 } else if (proxy.type.tsym == syms.migratedValueClassType.tsym && sym.kind == TYP) {
1592 sym.flags_field |= MIGRATED_VALUE_CLASS;
1593 if (needsValueFlag(sym, sym.flags_field)) {
1594 sym.flags_field |= VALUE_CLASS;
1595 sym.flags_field &= ~IDENTITY_TYPE;
1596 }
1597 } else if (proxy.type.tsym == syms.restrictedType.tsym) {
1598 Assert.check(sym.kind == MTH);
1599 sym.flags_field |= RESTRICTED;
1600 }
1601 proxies.append(proxy);
1602 }
1603 }
1604 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1605 }
1606 //where:
1607 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) {
1608 for (Pair<Name, Attribute> v : proxy.values) {
1609 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) {
1610 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
1611 sym.flags_field |= flag;
1612 }
1613 }
1614 }
1615 }
1616
1617 /** Read parameter annotations.
1618 */
1619 void readParameterAnnotations(Symbol meth) {
1620 int numParameters;
1621 try {
1622 numParameters = buf.getByte(bp++) & 0xFF;
1623 } catch (UnderflowException e) {
1624 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1625 }
1626 if (parameterAnnotations == null) {
1627 parameterAnnotations = new ParameterAnnotations[numParameters];
1628 } else if (parameterAnnotations.length != numParameters) {
1629 //the RuntimeVisibleParameterAnnotations and RuntimeInvisibleParameterAnnotations
1630 //provide annotations for a different number of parameters, ignore:
1631 if (lintClassfile) {
1632 log.warning(LintCategory.CLASSFILE, Warnings.RuntimeVisibleInvisibleParamAnnotationsMismatch(currentClassFile));
1633 }
1634 for (int pnum = 0; pnum < numParameters; pnum++) {
1635 readAnnotations();
1636 }
1637 parameterAnnotations = null;
1638 return ;
1639 }
1640 for (int pnum = 0; pnum < numParameters; pnum++) {
1641 if (parameterAnnotations[pnum] == null) {
1642 parameterAnnotations[pnum] = new ParameterAnnotations();
1643 }
1644 parameterAnnotations[pnum].add(readAnnotations());
1645 }
1646 }
1647
1648 void attachTypeAnnotations(final Symbol sym) {
1649 int numAttributes = nextChar();
1650 if (numAttributes != 0) {
1651 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1652 for (int i = 0; i < numAttributes; i++)
1653 proxies.append(readTypeAnnotation());
1654 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1655 }
1656 }
1657
1658 /** Attach the default value for an annotation element.
1659 */
1660 void attachAnnotationDefault(final Symbol sym) {
1661 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1662 final Attribute value = readAttributeValue();
1663
1664 // The default value is set later during annotation. It might
1665 // be the case that the Symbol sym is annotated _after_ the
1666 // repeating instances that depend on this default value,
1667 // because of this we set an interim value that tells us this
1668 // element (most likely) has a default.
1669 //
1670 // Set interim value for now, reset just before we do this
1671 // properly at annotate time.
1672 meth.defaultValue = value;
1673 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1674 }
1675
1676 Type readTypeOrClassSymbol(int i) {
1677 return readTypeToProxy(i);
1678 }
1679 Type readTypeToProxy(int i) {
1680 if (currentModule.module_info == currentOwner) {
1681 return new ProxyType(i);
1682 } else {
1683 return poolReader.getType(i);
1684 }
1685 }
1686
1687 CompoundAnnotationProxy readCompoundAnnotation() {
1688 Type t;
1689 if (currentModule.module_info == currentOwner) {
1690 int cpIndex = nextChar();
1691 t = new ProxyType(cpIndex);
1692 } else {
1693 t = readTypeOrClassSymbol(nextChar());
1694 }
1695 int numFields = nextChar();
1696 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1697 for (int i=0; i<numFields; i++) {
1698 Name name = poolReader.getName(nextChar());
1699 Attribute value = readAttributeValue();
1700 pairs.append(new Pair<>(name, value));
1701 }
1702 return new CompoundAnnotationProxy(t, pairs.toList());
1703 }
1704
1705 TypeAnnotationProxy readTypeAnnotation() {
1706 TypeAnnotationPosition position = readPosition();
1707 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1708
1709 return new TypeAnnotationProxy(proxy, position);
1710 }
1711
1712 TypeAnnotationPosition readPosition() {
1713 int tag = nextByte(); // TargetType tag is a byte
1714
1715 if (!TargetType.isValidTargetTypeValue(tag))
1716 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1717
1718 TargetType type = TargetType.fromTargetTypeValue(tag);
1719
1720 switch (type) {
1721 // instanceof
1722 case INSTANCEOF: {
1723 final int offset = nextChar();
1724 final TypeAnnotationPosition position =
1725 TypeAnnotationPosition.instanceOf(readTypePath());
1726 position.offset = offset;
1727 return position;
1728 }
1729 // new expression
1730 case NEW: {
1731 final int offset = nextChar();
1732 final TypeAnnotationPosition position =
1733 TypeAnnotationPosition.newObj(readTypePath());
1734 position.offset = offset;
1735 return position;
1736 }
1737 // constructor/method reference receiver
1738 case CONSTRUCTOR_REFERENCE: {
1739 final int offset = nextChar();
1740 final TypeAnnotationPosition position =
1741 TypeAnnotationPosition.constructorRef(readTypePath());
1742 position.offset = offset;
1743 return position;
1744 }
1745 case METHOD_REFERENCE: {
1746 final int offset = nextChar();
1747 final TypeAnnotationPosition position =
1748 TypeAnnotationPosition.methodRef(readTypePath());
1749 position.offset = offset;
1750 return position;
1751 }
1752 // local variable
1753 case LOCAL_VARIABLE: {
1754 final int table_length = nextChar();
1755 final int[] newLvarOffset = new int[table_length];
1756 final int[] newLvarLength = new int[table_length];
1757 final int[] newLvarIndex = new int[table_length];
1758
1759 for (int i = 0; i < table_length; ++i) {
1760 newLvarOffset[i] = nextChar();
1761 newLvarLength[i] = nextChar();
1762 newLvarIndex[i] = nextChar();
1763 }
1764
1765 final TypeAnnotationPosition position =
1766 TypeAnnotationPosition.localVariable(readTypePath());
1767 position.lvarOffset = newLvarOffset;
1768 position.lvarLength = newLvarLength;
1769 position.lvarIndex = newLvarIndex;
1770 return position;
1771 }
1772 // resource variable
1773 case RESOURCE_VARIABLE: {
1774 final int table_length = nextChar();
1775 final int[] newLvarOffset = new int[table_length];
1776 final int[] newLvarLength = new int[table_length];
1777 final int[] newLvarIndex = new int[table_length];
1778
1779 for (int i = 0; i < table_length; ++i) {
1780 newLvarOffset[i] = nextChar();
1781 newLvarLength[i] = nextChar();
1782 newLvarIndex[i] = nextChar();
1783 }
1784
1785 final TypeAnnotationPosition position =
1786 TypeAnnotationPosition.resourceVariable(readTypePath());
1787 position.lvarOffset = newLvarOffset;
1788 position.lvarLength = newLvarLength;
1789 position.lvarIndex = newLvarIndex;
1790 return position;
1791 }
1792 // exception parameter
1793 case EXCEPTION_PARAMETER: {
1794 final int exception_index = nextChar();
1795 final TypeAnnotationPosition position =
1796 TypeAnnotationPosition.exceptionParameter(readTypePath());
1797 position.setExceptionIndex(exception_index);
1798 return position;
1799 }
1800 // method receiver
1801 case METHOD_RECEIVER:
1802 return TypeAnnotationPosition.methodReceiver(readTypePath());
1803 // type parameter
1804 case CLASS_TYPE_PARAMETER: {
1805 final int parameter_index = nextByte();
1806 return TypeAnnotationPosition
1807 .typeParameter(readTypePath(), parameter_index);
1808 }
1809 case METHOD_TYPE_PARAMETER: {
1810 final int parameter_index = nextByte();
1811 return TypeAnnotationPosition
1812 .methodTypeParameter(readTypePath(), parameter_index);
1813 }
1814 // type parameter bound
1815 case CLASS_TYPE_PARAMETER_BOUND: {
1816 final int parameter_index = nextByte();
1817 final int bound_index = nextByte();
1818 return TypeAnnotationPosition
1819 .typeParameterBound(readTypePath(), parameter_index,
1820 bound_index);
1821 }
1822 case METHOD_TYPE_PARAMETER_BOUND: {
1823 final int parameter_index = nextByte();
1824 final int bound_index = nextByte();
1825 return TypeAnnotationPosition
1826 .methodTypeParameterBound(readTypePath(), parameter_index,
1827 bound_index);
1828 }
1829 // class extends or implements clause
1830 case CLASS_EXTENDS: {
1831 final int type_index = nextChar();
1832 return TypeAnnotationPosition.classExtends(readTypePath(),
1833 type_index);
1834 }
1835 // throws
1836 case THROWS: {
1837 final int type_index = nextChar();
1838 return TypeAnnotationPosition.methodThrows(readTypePath(),
1839 type_index);
1840 }
1841 // method parameter
1842 case METHOD_FORMAL_PARAMETER: {
1843 final int parameter_index = nextByte();
1844 return TypeAnnotationPosition.methodParameter(readTypePath(),
1845 parameter_index);
1846 }
1847 // type cast
1848 case CAST: {
1849 final int offset = nextChar();
1850 final int type_index = nextByte();
1851 final TypeAnnotationPosition position =
1852 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1853 position.offset = offset;
1854 return position;
1855 }
1856 // method/constructor/reference type argument
1857 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1858 final int offset = nextChar();
1859 final int type_index = nextByte();
1860 final TypeAnnotationPosition position = TypeAnnotationPosition
1861 .constructorInvocationTypeArg(readTypePath(), type_index);
1862 position.offset = offset;
1863 return position;
1864 }
1865 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1866 final int offset = nextChar();
1867 final int type_index = nextByte();
1868 final TypeAnnotationPosition position = TypeAnnotationPosition
1869 .methodInvocationTypeArg(readTypePath(), type_index);
1870 position.offset = offset;
1871 return position;
1872 }
1873 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1874 final int offset = nextChar();
1875 final int type_index = nextByte();
1876 final TypeAnnotationPosition position = TypeAnnotationPosition
1877 .constructorRefTypeArg(readTypePath(), type_index);
1878 position.offset = offset;
1879 return position;
1880 }
1881 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1882 final int offset = nextChar();
1883 final int type_index = nextByte();
1884 final TypeAnnotationPosition position = TypeAnnotationPosition
1885 .methodRefTypeArg(readTypePath(), type_index);
1886 position.offset = offset;
1887 return position;
1888 }
1889 // We don't need to worry about these
1890 case METHOD_RETURN:
1891 return TypeAnnotationPosition.methodReturn(readTypePath());
1892 case FIELD:
1893 return TypeAnnotationPosition.field(readTypePath());
1894 case UNKNOWN:
1895 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1896 default:
1897 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1898 }
1899 }
1900
1901 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1902 int len = nextByte();
1903 ListBuffer<Integer> loc = new ListBuffer<>();
1904 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1905 loc = loc.append(nextByte());
1906
1907 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1908
1909 }
1910
1911 /**
1912 * Helper function to read an optional pool entry (with given function); this is used while parsing
1913 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor,
1914 * as per JVMS.
1915 */
1916 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) {
1917 return (index == 0) ?
1918 defaultValue :
1919 poolFunc.apply(index);
1920 }
1921
1922 Attribute readAttributeValue() {
1923 char c;
1924 try {
1925 c = (char)buf.getByte(bp++);
1926 } catch (UnderflowException e) {
1927 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1928 }
1929 switch (c) {
1930 case 'B':
1931 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar()));
1932 case 'C':
1933 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar()));
1934 case 'D':
1935 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar()));
1936 case 'F':
1937 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar()));
1938 case 'I':
1939 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar()));
1940 case 'J':
1941 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar()));
1942 case 'S':
1943 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar()));
1944 case 'Z':
1945 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar()));
1946 case 's':
1947 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString());
1948 case 'e':
1949 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar()));
1950 case 'c':
1951 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1952 case '[': {
1953 int n = nextChar();
1954 ListBuffer<Attribute> l = new ListBuffer<>();
1955 for (int i=0; i<n; i++)
1956 l.append(readAttributeValue());
1957 return new ArrayAttributeProxy(l.toList());
1958 }
1959 case '@':
1960 return readCompoundAnnotation();
1961 default:
1962 throw new AssertionError("unknown annotation tag '" + c + "'");
1963 }
1964 }
1965
1966 interface ProxyVisitor extends Attribute.Visitor {
1967 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1968 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1969 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1970 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1971 }
1972
1973 static class EnumAttributeProxy extends Attribute {
1974 Type enumType;
1975 Name enumerator;
1976 public EnumAttributeProxy(Type enumType, Name enumerator) {
1977 super(null);
1978 this.enumType = enumType;
1979 this.enumerator = enumerator;
1980 }
1981 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1982 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1983 public String toString() {
1984 return "/*proxy enum*/" + enumType + "." + enumerator;
1985 }
1986 }
1987
1988 static class ClassAttributeProxy extends Attribute {
1989 Type classType;
1990 public ClassAttributeProxy(Type classType) {
1991 super(null);
1992 this.classType = classType;
1993 }
1994 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1995 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1996 public String toString() {
1997 return "/*proxy class*/" + classType + ".class";
1998 }
1999 }
2000
2001 static class ArrayAttributeProxy extends Attribute {
2002 List<Attribute> values;
2003 ArrayAttributeProxy(List<Attribute> values) {
2004 super(null);
2005 this.values = values;
2006 }
2007 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
2008 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2009 public String toString() {
2010 return "{" + values + "}";
2011 }
2012 }
2013
2014 /** A temporary proxy representing a compound attribute.
2015 */
2016 static class CompoundAnnotationProxy extends Attribute {
2017 final List<Pair<Name,Attribute>> values;
2018 public CompoundAnnotationProxy(Type type,
2019 List<Pair<Name,Attribute>> values) {
2020 super(type);
2021 this.values = values;
2022 }
2023 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
2024 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2025 public String toString() {
2026 StringBuilder buf = new StringBuilder();
2027 buf.append("@");
2028 buf.append(type.tsym.getQualifiedName());
2029 buf.append("/*proxy*/{");
2030 boolean first = true;
2031 for (List<Pair<Name,Attribute>> v = values;
2032 v.nonEmpty(); v = v.tail) {
2033 Pair<Name,Attribute> value = v.head;
2034 if (!first) buf.append(",");
2035 first = false;
2036 buf.append(value.fst);
2037 buf.append("=");
2038 buf.append(value.snd);
2039 }
2040 buf.append("}");
2041 return buf.toString();
2042 }
2043 }
2044
2045 /** A temporary proxy representing a type annotation.
2046 */
2047 static class TypeAnnotationProxy {
2048 final CompoundAnnotationProxy compound;
2049 final TypeAnnotationPosition position;
2050 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2051 TypeAnnotationPosition position) {
2052 this.compound = compound;
2053 this.position = position;
2054 }
2055 }
2056
2057 class AnnotationDeproxy implements ProxyVisitor {
2058 private ClassSymbol requestingOwner;
2059
2060 AnnotationDeproxy(ClassSymbol owner) {
2061 this.requestingOwner = owner;
2062 }
2063
2064 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2065 // also must fill in types!!!!
2066 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2067 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2068 buf.append(deproxyCompound(l.head));
2069 }
2070 return buf.toList();
2071 }
2072
2073 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2074 Type annotationType = resolvePossibleProxyType(a.type);
2075 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2076 for (List<Pair<Name,Attribute>> l = a.values;
2077 l.nonEmpty();
2078 l = l.tail) {
2079 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2080 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2081 }
2082 return new Attribute.Compound(annotationType, buf.toList());
2083 }
2084
2085 MethodSymbol findAccessMethod(Type container, Name name) {
2086 CompletionFailure failure = null;
2087 try {
2088 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2089 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2090 return (MethodSymbol) sym;
2091 }
2092 } catch (CompletionFailure ex) {
2093 failure = ex;
2094 }
2095 // The method wasn't found: emit a warning and recover
2096 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2097 try {
2098 if (lintClassfile) {
2099 if (failure == null) {
2100 log.warning(Warnings.AnnotationMethodNotFound(container, name));
2101 } else {
2102 log.warning(Warnings.AnnotationMethodNotFoundReason(container,
2103 name,
2104 failure.getDetailValue()));//diagnostic, if present
2105 }
2106 }
2107 } finally {
2108 log.useSource(prevSource);
2109 }
2110 // Construct a new method type and symbol. Use bottom
2111 // type (typeof null) as return type because this type is
2112 // a subtype of all reference types and can be converted
2113 // to primitive types by unboxing.
2114 MethodType mt = new MethodType(List.nil(),
2115 syms.botType,
2116 List.nil(),
2117 syms.methodClass);
2118 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2119 }
2120
2121 Attribute result;
2122 Type type;
2123 Attribute deproxy(Type t, Attribute a) {
2124 Type oldType = type;
2125 try {
2126 type = t;
2127 a.accept(this);
2128 return result;
2129 } finally {
2130 type = oldType;
2131 }
2132 }
2133
2134 // implement Attribute.Visitor below
2135
2136 public void visitConstant(Attribute.Constant value) {
2137 // assert value.type == type;
2138 result = value;
2139 }
2140
2141 public void visitClass(Attribute.Class clazz) {
2142 result = clazz;
2143 }
2144
2145 public void visitEnum(Attribute.Enum e) {
2146 throw new AssertionError(); // shouldn't happen
2147 }
2148
2149 public void visitCompound(Attribute.Compound compound) {
2150 throw new AssertionError(); // shouldn't happen
2151 }
2152
2153 public void visitArray(Attribute.Array array) {
2154 throw new AssertionError(); // shouldn't happen
2155 }
2156
2157 public void visitError(Attribute.Error e) {
2158 throw new AssertionError(); // shouldn't happen
2159 }
2160
2161 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2162 // type.tsym.flatName() should == proxy.enumFlatName
2163 Type enumType = resolvePossibleProxyType(proxy.enumType);
2164 TypeSymbol enumTypeSym = enumType.tsym;
2165 VarSymbol enumerator = null;
2166 CompletionFailure failure = null;
2167 try {
2168 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2169 if (sym.kind == VAR) {
2170 enumerator = (VarSymbol)sym;
2171 break;
2172 }
2173 }
2174 }
2175 catch (CompletionFailure ex) {
2176 failure = ex;
2177 }
2178 if (enumerator == null) {
2179 if (failure != null) {
2180 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile,
2181 enumTypeSym,
2182 proxy.enumerator,
2183 failure.getDiagnostic()));
2184 } else {
2185 log.warning(Warnings.UnknownEnumConstant(currentClassFile,
2186 enumTypeSym,
2187 proxy.enumerator));
2188 }
2189 result = new Attribute.Enum(enumTypeSym.type,
2190 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2191 } else {
2192 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2193 }
2194 }
2195
2196 @Override
2197 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2198 Type classType = resolvePossibleProxyType(proxy.classType);
2199 result = new Attribute.Class(types, classType);
2200 }
2201
2202 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2203 int length = proxy.values.length();
2204 Attribute[] ats = new Attribute[length];
2205 Type elemtype = types.elemtype(type);
2206 int i = 0;
2207 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2208 ats[i++] = deproxy(elemtype, p.head);
2209 }
2210 result = new Attribute.Array(type, ats);
2211 }
2212
2213 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2214 result = deproxyCompound(proxy);
2215 }
2216
2217 Type resolvePossibleProxyType(Type t) {
2218 if (t instanceof ProxyType proxyType) {
2219 Assert.check(requestingOwner.owner instanceof ModuleSymbol);
2220 ModuleSymbol prevCurrentModule = currentModule;
2221 currentModule = (ModuleSymbol) requestingOwner.owner;
2222 try {
2223 return proxyType.resolve();
2224 } finally {
2225 currentModule = prevCurrentModule;
2226 }
2227 } else {
2228 return t;
2229 }
2230 }
2231 }
2232
2233 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2234 final MethodSymbol sym;
2235 final Attribute value;
2236 final JavaFileObject classFile = currentClassFile;
2237
2238 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2239 super(currentOwner.kind == MTH
2240 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2241 this.sym = sym;
2242 this.value = value;
2243 }
2244
2245 @Override
2246 public void run() {
2247 JavaFileObject previousClassFile = currentClassFile;
2248 try {
2249 // Reset the interim value set earlier in
2250 // attachAnnotationDefault().
2251 sym.defaultValue = null;
2252 currentClassFile = classFile;
2253 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2254 } finally {
2255 currentClassFile = previousClassFile;
2256 }
2257 }
2258
2259 @Override
2260 public String toString() {
2261 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2262 }
2263 }
2264
2265 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2266 final Symbol sym;
2267 final List<CompoundAnnotationProxy> l;
2268 final JavaFileObject classFile;
2269
2270 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2271 super(currentOwner.kind == MTH
2272 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2273 if (sym.kind == TYP && sym.owner.kind == MDL) {
2274 this.sym = sym.owner;
2275 } else {
2276 this.sym = sym;
2277 }
2278 this.l = l;
2279 this.classFile = currentClassFile;
2280 }
2281
2282 @Override
2283 public void run() {
2284 JavaFileObject previousClassFile = currentClassFile;
2285 try {
2286 currentClassFile = classFile;
2287 List<Attribute.Compound> newList = deproxyCompoundList(l);
2288 for (Attribute.Compound attr : newList) {
2289 if (attr.type.tsym == syms.deprecatedType.tsym) {
2290 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2291 Attribute forRemoval = attr.member(names.forRemoval);
2292 if (forRemoval instanceof Attribute.Constant constant) {
2293 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
2294 sym.flags_field |= DEPRECATED_REMOVAL;
2295 }
2296 }
2297 }
2298 }
2299 if (sym.annotationsPendingCompletion()) {
2300 sym.setDeclarationAttributes(newList);
2301 } else {
2302 sym.appendAttributes(newList);
2303 }
2304 } finally {
2305 currentClassFile = previousClassFile;
2306 }
2307 }
2308
2309 @Override
2310 public String toString() {
2311 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2312 }
2313 }
2314
2315 class TypeAnnotationCompleter extends AnnotationCompleter {
2316
2317 List<TypeAnnotationProxy> proxies;
2318
2319 TypeAnnotationCompleter(Symbol sym,
2320 List<TypeAnnotationProxy> proxies) {
2321 super(sym, List.nil());
2322 this.proxies = proxies;
2323 }
2324
2325 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2326 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2327 for (TypeAnnotationProxy proxy: proxies) {
2328 Attribute.Compound compound = deproxyCompound(proxy.compound);
2329 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2330 buf.add(typeCompound);
2331 }
2332 return buf.toList();
2333 }
2334
2335 @Override
2336 public void run() {
2337 JavaFileObject previousClassFile = currentClassFile;
2338 try {
2339 currentClassFile = classFile;
2340 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2341 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2342 addTypeAnnotationsToSymbol(sym, newList);
2343 } finally {
2344 currentClassFile = previousClassFile;
2345 }
2346 }
2347 }
2348
2349 /**
2350 * Rewrites types in the given symbol to include type annotations.
2351 *
2352 * <p>The list of type annotations includes annotations for all types in the signature of the
2353 * symbol. Associating the annotations with the correct type requires interpreting the JVMS
2354 * 4.7.20-A target_type to locate the correct type to rewrite, and then interpreting the JVMS
2355 * 4.7.20.2 type_path to associate the annotation with the correct contained type.
2356 */
2357 private void addTypeAnnotationsToSymbol(Symbol s, List<Attribute.TypeCompound> attributes) {
2358 try {
2359 new TypeAnnotationSymbolVisitor(attributes).visit(s, null);
2360 } catch (CompletionFailure ex) {
2361 JavaFileObject prev = log.useSource(currentClassFile);
2362 try {
2363 log.error(Errors.CantAttachTypeAnnotations(attributes, s.owner, s.name, ex.getDetailValue()));
2364 } finally {
2365 log.useSource(prev);
2366 }
2367 }
2368 }
2369
2370 private static class TypeAnnotationSymbolVisitor
2371 extends Types.DefaultSymbolVisitor<Void, Void> {
2372
2373 private final List<Attribute.TypeCompound> attributes;
2374
2375 private TypeAnnotationSymbolVisitor(List<Attribute.TypeCompound> attributes) {
2376 this.attributes = attributes;
2377 }
2378
2379 /**
2380 * A supertype_index value of 65535 specifies that the annotation appears on the superclass
2381 * in an extends clause of a class declaration, see JVMS 4.7.20.1
2382 */
2383 public static final int SUPERCLASS_INDEX = 65535;
2384
2385 @Override
2386 public Void visitClassSymbol(Symbol.ClassSymbol s, Void unused) {
2387 ClassType t = (ClassType) s.type;
2388 int i = 0;
2389 ListBuffer<Type> interfaces = new ListBuffer<>();
2390 for (Type itf : t.interfaces_field) {
2391 interfaces.add(addTypeAnnotations(itf, classExtends(i++)));
2392 }
2393 t.interfaces_field = interfaces.toList();
2394 t.supertype_field = addTypeAnnotations(t.supertype_field, classExtends(SUPERCLASS_INDEX));
2395 if (t.typarams_field != null) {
2396 t.typarams_field =
2397 rewriteTypeParameters(
2398 t.typarams_field, TargetType.CLASS_TYPE_PARAMETER_BOUND);
2399 }
2400 return null;
2401 }
2402
2403 @Override
2404 public Void visitMethodSymbol(Symbol.MethodSymbol s, Void unused) {
2405 Type t = s.type;
2406 if (t.hasTag(TypeTag.FORALL)) {
2407 Type.ForAll fa = (Type.ForAll) t;
2408 fa.tvars = rewriteTypeParameters(fa.tvars, TargetType.METHOD_TYPE_PARAMETER_BOUND);
2409 t = fa.qtype;
2410 }
2411 MethodType mt = (MethodType) t;
2412 ListBuffer<Type> argtypes = new ListBuffer<>();
2413 int i = 0;
2414 for (Symbol.VarSymbol param : s.params) {
2415 param.type = addTypeAnnotations(param.type, methodFormalParameter(i++));
2416 argtypes.add(param.type);
2417 }
2418 mt.argtypes = argtypes.toList();
2419 ListBuffer<Type> thrown = new ListBuffer<>();
2420 i = 0;
2421 for (Type thrownType : mt.thrown) {
2422 thrown.add(addTypeAnnotations(thrownType, thrownType(i++)));
2423 }
2424 mt.thrown = thrown.toList();
2425 /* possible information loss if the type of the method is void then we can't add type
2426 * annotations to it
2427 */
2428 if (!mt.restype.hasTag(TypeTag.VOID)) {
2429 mt.restype = addTypeAnnotations(mt.restype, TargetType.METHOD_RETURN);
2430 }
2431
2432 Type recvtype = mt.recvtype != null ? mt.recvtype : s.implicitReceiverType();
2433 if (recvtype != null) {
2434 Type annotated = addTypeAnnotations(recvtype, TargetType.METHOD_RECEIVER);
2435 if (annotated != recvtype) {
2436 mt.recvtype = annotated;
2437 }
2438 }
2439 return null;
2440 }
2441
2442 @Override
2443 public Void visitVarSymbol(Symbol.VarSymbol s, Void unused) {
2444 s.type = addTypeAnnotations(s.type, TargetType.FIELD);
2445 return null;
2446 }
2447
2448 @Override
2449 public Void visitSymbol(Symbol s, Void unused) {
2450 return null;
2451 }
2452
2453 private List<Type> rewriteTypeParameters(List<Type> tvars, TargetType boundType) {
2454 ListBuffer<Type> tvarbuf = new ListBuffer<>();
2455 int typeVariableIndex = 0;
2456 for (Type tvar : tvars) {
2457 Type bound = tvar.getUpperBound();
2458 if (bound.isCompound()) {
2459 ClassType ct = (ClassType) bound;
2460 int boundIndex = 0;
2461 if (ct.supertype_field != null) {
2462 ct.supertype_field =
2463 addTypeAnnotations(
2464 ct.supertype_field,
2465 typeParameterBound(
2466 boundType, typeVariableIndex, boundIndex++));
2467 }
2468 ListBuffer<Type> itfbuf = new ListBuffer<>();
2469 for (Type itf : ct.interfaces_field) {
2470 itfbuf.add(
2471 addTypeAnnotations(
2472 itf,
2473 typeParameterBound(
2474 boundType, typeVariableIndex, boundIndex++)));
2475 }
2476 ct.interfaces_field = itfbuf.toList();
2477 } else {
2478 bound =
2479 addTypeAnnotations(
2480 bound,
2481 typeParameterBound(
2482 boundType,
2483 typeVariableIndex,
2484 bound.isInterface() ? 1 : 0));
2485 }
2486 ((TypeVar) tvar).setUpperBound(bound);
2487 tvarbuf.add(tvar);
2488 typeVariableIndex++;
2489 }
2490 return tvarbuf.toList();
2491 }
2492
2493 private Type addTypeAnnotations(Type type, TargetType targetType) {
2494 return addTypeAnnotations(type, pos -> pos.type == targetType);
2495 }
2496
2497 private Type addTypeAnnotations(Type type, Predicate<TypeAnnotationPosition> filter) {
2498 Assert.checkNonNull(type);
2499
2500 // Find type annotations that match the given target type
2501 ListBuffer<Attribute.TypeCompound> filtered = new ListBuffer<>();
2502 for (Attribute.TypeCompound attribute : this.attributes) {
2503 if (filter.test(attribute.position)) {
2504 filtered.add(attribute);
2505 }
2506 }
2507 if (filtered.isEmpty()) {
2508 return type;
2509 }
2510
2511 // Group the matching annotations by their type path. Each group of annotations will be
2512 // added to a type at that location.
2513 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2514 attributesByPath = new HashMap<>();
2515 for (Attribute.TypeCompound attribute : filtered.toList()) {
2516 attributesByPath
2517 .computeIfAbsent(attribute.position.location, k -> new ListBuffer<>())
2518 .add(attribute);
2519 }
2520
2521 // Rewrite the type and add the annotations
2522 type = new TypeAnnotationStructuralTypeMapping(attributesByPath).visit(type, List.nil());
2523
2524 return type;
2525 }
2526
2527 private static Predicate<TypeAnnotationPosition> typeParameterBound(
2528 TargetType targetType, int parameterIndex, int boundIndex) {
2529 return pos ->
2530 pos.type == targetType
2531 && pos.parameter_index == parameterIndex
2532 && pos.bound_index == boundIndex;
2533 }
2534
2535 private static Predicate<TypeAnnotationPosition> methodFormalParameter(int index) {
2536 return pos ->
2537 pos.type == TargetType.METHOD_FORMAL_PARAMETER && pos.parameter_index == index;
2538 }
2539
2540 private static Predicate<TypeAnnotationPosition> thrownType(int index) {
2541 return pos -> pos.type == TargetType.THROWS && pos.type_index == index;
2542 }
2543
2544 private static Predicate<TypeAnnotationPosition> classExtends(int index) {
2545 return pos -> pos.type == TargetType.CLASS_EXTENDS && pos.type_index == index;
2546 }
2547 }
2548
2549 /**
2550 * A type mapping that rewrites the type to include type annotations.
2551 *
2552 * <p>This logic is similar to {@link Type.StructuralTypeMapping}, but also tracks the path to
2553 * the contained types being rewritten, and so cannot easily share the existing logic.
2554 */
2555 private static final class TypeAnnotationStructuralTypeMapping
2556 extends Types.TypeMapping<List<TypeAnnotationPosition.TypePathEntry>> {
2557
2558 private final Map<List<TypeAnnotationPosition.TypePathEntry>,
2559 ListBuffer<Attribute.TypeCompound>> attributesByPath;
2560
2561 private TypeAnnotationStructuralTypeMapping(
2562 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2563 attributesByPath) {
2564 this.attributesByPath = attributesByPath;
2565 }
2566
2567
2568 @Override
2569 public Type visitClassType(ClassType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2570 // As described in JVMS 4.7.20.2, type annotations on nested types are located with
2571 // 'left-to-right' steps starting on 'the outermost part of the type for which a type
2572 // annotation is admissible'. So the current path represents the outermost containing
2573 // type of the type being visited, and we add type path steps for every contained nested
2574 // type.
2575 Type outer = t.getEnclosingType();
2576 Type outer1 = outer != Type.noType ? visit(outer, path) : outer;
2577 for (Type curr = t.getEnclosingType();
2578 curr != Type.noType;
2579 curr = curr.getEnclosingType()) {
2580 path = path.append(TypeAnnotationPosition.TypePathEntry.INNER_TYPE);
2581 }
2582 List<Type> typarams = t.getTypeArguments();
2583 List<Type> typarams1 = rewriteTypeParams(path, typarams);
2584 if (outer1 != outer || typarams != typarams1) {
2585 t = new ClassType(outer1, typarams1, t.tsym, t.getMetadata());
2586 }
2587 return reannotate(t, path);
2588 }
2589
2590 private List<Type> rewriteTypeParams(
2591 List<TypeAnnotationPosition.TypePathEntry> path, List<Type> typarams) {
2592 var i = IntStream.iterate(0, x -> x + 1).iterator();
2593 return typarams.map(typaram -> visit(typaram,
2594 path.append(new TypeAnnotationPosition.TypePathEntry(
2595 TypeAnnotationPosition.TypePathEntryKind.TYPE_ARGUMENT, i.nextInt()))));
2596 }
2597
2598 @Override
2599 public Type visitWildcardType(
2600 WildcardType wt, List<TypeAnnotationPosition.TypePathEntry> path) {
2601 Type t = wt.type;
2602 if (t != null) {
2603 t = visit(t, path.append(TypeAnnotationPosition.TypePathEntry.WILDCARD));
2604 }
2605 if (t != wt.type) {
2606 wt = new WildcardType(t, wt.kind, wt.tsym, wt.bound, wt.getMetadata());
2607 }
2608 return reannotate(wt, path);
2609 }
2610
2611 @Override
2612 public Type visitArrayType(ArrayType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2613 Type elemtype = t.elemtype;
2614 Type elemtype1 =
2615 visit(elemtype, path.append(TypeAnnotationPosition.TypePathEntry.ARRAY));
2616 if (elemtype1 != elemtype) {
2617 t = new ArrayType(elemtype1, t.tsym, t.getMetadata());
2618 }
2619 return reannotate(t, path);
2620 }
2621
2622 @Override
2623 public Type visitType(Type t, List<TypeAnnotationPosition.TypePathEntry> path) {
2624 return reannotate(t, path);
2625 }
2626
2627 Type reannotate(Type type, List<TypeAnnotationPosition.TypePathEntry> path) {
2628 List<Attribute.TypeCompound> attributes = attributesForPath(path);
2629 if (attributes.isEmpty()) {
2630 return type;
2631 }
2632 // Runtime-visible and -invisible annotations are completed separately, so if the same
2633 // type has annotations from both it will get annotated twice.
2634 TypeMetadata.Annotations existing = type.getMetadata(TypeMetadata.Annotations.class);
2635 if (existing != null) {
2636 existing.annotationBuffer().addAll(attributes);
2637 return type;
2638 }
2639 return type.annotatedType(attributes);
2640 }
2641
2642 List<Attribute.TypeCompound> attributesForPath(
2643 List<TypeAnnotationPosition.TypePathEntry> path) {
2644 ListBuffer<Attribute.TypeCompound> attributes = attributesByPath.remove(path);
2645 return attributes != null ? attributes.toList() : List.nil();
2646 }
2647 }
2648
2649 /* **********************************************************************
2650 * Reading Symbols
2651 ***********************************************************************/
2652
2653 /** Read a field.
2654 */
2655 VarSymbol readField() {
2656 char rawFlags = nextChar();
2657 long flags = adjustFieldFlags(rawFlags);
2658 Name name = poolReader.getName(nextChar());
2659 Type type = poolReader.getType(nextChar());
2660 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2661 readMemberAttrs(v);
2662 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 ||
2663 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1)
2664 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v);
2665 return v;
2666 }
2667
2668 /** Read a method.
2669 */
2670 MethodSymbol readMethod() {
2671 char rawFlags = nextChar();
2672 long flags = adjustMethodFlags(rawFlags);
2673 Name name = poolReader.getName(nextChar());
2674 Type descriptorType = poolReader.getType(nextChar());
2675 Type type = descriptorType;
2676 if (currentOwner.isInterface() &&
2677 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2678 if (majorVersion > Version.V52.major ||
2679 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2680 if ((flags & (STATIC | PRIVATE)) == 0) {
2681 currentOwner.flags_field |= DEFAULT;
2682 flags |= DEFAULT | ABSTRACT;
2683 }
2684 } else {
2685 //protect against ill-formed classfiles
2686 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2687 Integer.toString(majorVersion),
2688 Integer.toString(minorVersion));
2689 }
2690 }
2691 validateMethodType(name, type);
2692 boolean forceLocal = false;
2693 if (name == names.init && currentOwner.hasOuterInstance()) {
2694 // Sometimes anonymous classes don't have an outer
2695 // instance, however, there is no reliable way to tell so
2696 // we never strip this$n
2697 // ditto for local classes. Local classes that have an enclosing method set
2698 // won't pass the "hasOuterInstance" check above, but those that don't have an
2699 // enclosing method (i.e. from initializers) will pass that check.
2700 boolean local = forceLocal =
2701 !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2702 if (!currentOwner.name.isEmpty() && !local)
2703 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2704 type.getReturnType(),
2705 type.getThrownTypes(),
2706 syms.methodClass);
2707 }
2708 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2709 if (types.isSignaturePolymorphic(m)) {
2710 m.flags_field |= SIGNATURE_POLYMORPHIC;
2711 }
2712 if (saveParameterNames)
2713 initParameterNames(m);
2714 Symbol prevOwner = currentOwner;
2715 currentOwner = m;
2716 try {
2717 readMemberAttrs(m);
2718 } finally {
2719 currentOwner = prevOwner;
2720 }
2721 validateMethodType(name, m.type);
2722 adjustParameterAnnotations(m, descriptorType, forceLocal);
2723 setParameters(m, type);
2724
2725 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1)
2726 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m);
2727 if ((flags & VARARGS) != 0) {
2728 final Type last = type.getParameterTypes().last();
2729 if (last == null || !last.hasTag(ARRAY)) {
2730 m.flags_field &= ~VARARGS;
2731 throw badClassFile("malformed.vararg.method", m);
2732 }
2733 }
2734
2735 return m;
2736 }
2737
2738 void validateMethodType(Name name, Type t) {
2739 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) ||
2740 (name == names.init && !t.getReturnType().hasTag(TypeTag.VOID))) {
2741 throw badClassFile("method.descriptor.invalid", name);
2742 }
2743 }
2744
2745 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2746 if (args.isEmpty()) {
2747 return args;
2748 }
2749 boolean isVarargs = (flags & VARARGS) != 0;
2750 if (isVarargs) {
2751 Type varargsElem = args.last();
2752 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2753 for (Type t : args) {
2754 adjustedArgs.append(t != varargsElem ?
2755 t :
2756 ((ArrayType)t).makeVarargs());
2757 }
2758 args = adjustedArgs.toList();
2759 }
2760 return args.tail;
2761 }
2762
2763 /**
2764 * Init the parameter names array.
2765 * Parameter names are currently inferred from the names in the
2766 * LocalVariableTable attributes of a Code attribute.
2767 * (Note: this means parameter names are currently not available for
2768 * methods without a Code attribute.)
2769 * This method initializes an array in which to store the name indexes
2770 * of parameter names found in LocalVariableTable attributes. It is
2771 * slightly supersized to allow for additional slots with a start_pc of 0.
2772 */
2773 void initParameterNames(MethodSymbol sym) {
2774 // make allowance for synthetic parameters.
2775 final int excessSlots = 4;
2776 int expectedParameterSlots =
2777 Code.width(sym.type.getParameterTypes()) + excessSlots;
2778 if (parameterNameIndicesLvt == null
2779 || parameterNameIndicesLvt.length < expectedParameterSlots) {
2780 parameterNameIndicesLvt = new int[expectedParameterSlots];
2781 } else
2782 Arrays.fill(parameterNameIndicesLvt, 0);
2783 }
2784
2785 /**
2786 * Set the parameters for a method symbol, including any names and
2787 * annotations that were read.
2788 *
2789 * <p>The type of the symbol may have changed while reading the
2790 * method attributes (see the Signature attribute). This may be
2791 * because of generic information or because anonymous synthetic
2792 * parameters were added. The original type (as read from the
2793 * method descriptor) is used to help guess the existence of
2794 * anonymous synthetic parameters.
2795 */
2796 void setParameters(MethodSymbol sym, Type jvmType) {
2797 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2798 // the code in readMethod may have skipped the first
2799 // parameter when setting up the MethodType. If so, we
2800 // make a corresponding allowance here for the position of
2801 // the first parameter. Note that this assumes the
2802 // skipped parameter has a width of 1 -- i.e. it is not
2803 // a double width type (long or double.)
2804 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2805 // Sometimes anonymous classes don't have an outer
2806 // instance, however, there is no reliable way to tell so
2807 // we never strip this$n
2808 if (!currentOwner.name.isEmpty())
2809 firstParamLvt += 1;
2810 }
2811
2812 if (sym.type != jvmType) {
2813 // reading the method attributes has caused the
2814 // symbol's type to be changed. (i.e. the Signature
2815 // attribute.) This may happen if there are hidden
2816 // (synthetic) parameters in the descriptor, but not
2817 // in the Signature. The position of these hidden
2818 // parameters is unspecified; for now, assume they are
2819 // at the beginning, and so skip over them. The
2820 // primary case for this is two hidden parameters
2821 // passed into Enum constructors.
2822 int skip = Code.width(jvmType.getParameterTypes())
2823 - Code.width(sym.type.getParameterTypes());
2824 firstParamLvt += skip;
2825 }
2826 Set<Name> paramNames = new HashSet<>();
2827 ListBuffer<VarSymbol> params = new ListBuffer<>();
2828 // we maintain two index pointers, one for the LocalVariableTable attribute
2829 // and the other for the MethodParameters attribute.
2830 // This is needed as the MethodParameters attribute may contain
2831 // name_index = 0 in which case we want to fall back to the LocalVariableTable.
2832 // In such case, we still want to read the flags from the MethodParameters with that index.
2833 int nameIndexLvt = firstParamLvt;
2834 int nameIndexMp = 0;
2835 int annotationIndex = 0;
2836 for (Type t: sym.type.getParameterTypes()) {
2837 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames);
2838 params.append(param);
2839 if (parameterAnnotations != null) {
2840 ParameterAnnotations annotations = parameterAnnotations[annotationIndex];
2841 if (annotations != null && annotations.proxies != null
2842 && !annotations.proxies.isEmpty()) {
2843 annotate.normal(new AnnotationCompleter(param, annotations.proxies));
2844 }
2845 }
2846 nameIndexLvt += Code.width(t);
2847 nameIndexMp++;
2848 annotationIndex++;
2849 }
2850 Assert.check(parameterAnnotations == null ||
2851 parameterAnnotations.length == annotationIndex);
2852 Assert.checkNull(sym.params);
2853 sym.params = params.toList();
2854 parameterAnnotations = null;
2855 parameterNameIndicesLvt = null;
2856 parameterNameIndicesMp = null;
2857 allParameterAccessFlags = null;
2858 parameterAccessFlags = null;
2859 }
2860
2861 void adjustParameterAnnotations(MethodSymbol sym, Type methodDescriptor,
2862 boolean forceLocal) {
2863 if (parameterAnnotations == null) {
2864 return ;
2865 }
2866
2867 //the specification for Runtime(In)VisibleParameterAnnotations does not
2868 //enforce any mapping between the method parameters and the recorded
2869 //parameter annotation. Attempt a number of heuristics to adjust the
2870 //adjust parameterAnnotations to the percieved number of parameters:
2871
2872 int methodParameterCount = sym.type.getParameterTypes().size();
2873
2874 if (methodParameterCount == parameterAnnotations.length) {
2875 //we've got exactly as many parameter annotations as are parameters
2876 //of the method (after considering a possible Signature attribute),
2877 //no need to do anything. the parameter creation code will use
2878 //the 1-1 mapping to restore the annotations:
2879 return ;
2880 }
2881
2882 if (allParameterAccessFlags != null) {
2883 //MethodParameters attribute present, use it:
2884
2885 //count the number of non-synthetic and non-mandatory parameters:
2886 int realParameters = 0;
2887
2888 for (int i = 0; i < allParameterAccessFlags.length; i++) {
2889 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2890 realParameters++;
2891 }
2892 }
2893
2894 int methodDescriptorParameterCount = methodDescriptor.getParameterTypes().size();
2895
2896 if (realParameters == parameterAnnotations.length &&
2897 allParameterAccessFlags.length == methodDescriptorParameterCount) {
2898 //if we have parameter annotations for each non-synthetic/mandatory parameter,
2899 //and if Signature was not present, expand the parameterAnnotations to cover
2900 //all the method descriptor's parameters:
2901 if (sym.type == methodDescriptor) {
2902 ParameterAnnotations[] newParameterAnnotations =
2903 new ParameterAnnotations[methodParameterCount];
2904 int srcIndex = 0;
2905
2906 for (int i = 0; i < methodParameterCount; i++) {
2907 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2908 newParameterAnnotations[i] = parameterAnnotations[srcIndex++];
2909 }
2910 }
2911
2912 parameterAnnotations = newParameterAnnotations;
2913 } else {
2914 dropParameterAnnotations();
2915 }
2916 } else if (realParameters == methodParameterCount &&
2917 methodDescriptorParameterCount == parameterAnnotations.length &&
2918 allParameterAccessFlags.length == methodDescriptorParameterCount) {
2919 //if there are as many parameter annotations as parameters in
2920 //the method descriptor, and as many real parameters as parameters
2921 //in the method's type (after accounting for Signature), shrink
2922 //the parameterAnnotations to only cover the parameters from
2923 //the method's type:
2924 ParameterAnnotations[] newParameterAnnotations =
2925 new ParameterAnnotations[methodParameterCount];
2926 int targetIndex = 0;
2927
2928 for (int i = 0; i < parameterAnnotations.length; i++) {
2929 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2930 newParameterAnnotations[targetIndex++] = parameterAnnotations[i];
2931 }
2932 }
2933
2934 parameterAnnotations = newParameterAnnotations;
2935 } else {
2936 dropParameterAnnotations();
2937 }
2938 return ;
2939 }
2940
2941 if (!sym.isConstructor()) {
2942 //if the number of parameter annotations and the number of parameters
2943 //don't match, we don't have any heuristics to map one to the other
2944 //unless the method is a constructor:
2945 dropParameterAnnotations();
2946 return ;
2947 }
2948
2949 if (sym.owner.isEnum()) {
2950 if (methodParameterCount == parameterAnnotations.length + 2 &&
2951 sym.type == methodDescriptor) {
2952 //handle constructors of enum types without the Signature attribute -
2953 //there are the two synthetic parameters (name and ordinal) in the
2954 //constructor, but there may be only parameter annotations for the
2955 //real non-synthetic parameters:
2956 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[parameterAnnotations.length + 2];
2957 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 2, parameterAnnotations.length);
2958 parameterAnnotations = newParameterAnnotations;
2959 return ;
2960 }
2961 } else if (sym.owner.isDirectlyOrIndirectlyLocal() || forceLocal) {
2962 //local class may capture the enclosing instance (as the first parameter),
2963 //and local variables (as trailing parameters)
2964 //if there are less parameter annotations than parameters, put the existing
2965 //ones starting with offset:
2966 if (methodParameterCount > parameterAnnotations.length &&
2967 sym.type == methodDescriptor) {
2968 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[methodParameterCount];
2969 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 1, parameterAnnotations.length);
2970 parameterAnnotations = newParameterAnnotations;
2971 return ;
2972 }
2973 }
2974
2975 //no heuristics worked, drop the annotations:
2976 dropParameterAnnotations();
2977 }
2978
2979 private void dropParameterAnnotations() {
2980 parameterAnnotations = null;
2981 if (lintClassfile) {
2982 log.warning(LintCategory.CLASSFILE, Warnings.RuntimeInvisibleParameterAnnotations(currentClassFile));
2983 }
2984 }
2985 /**
2986 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method.
2987 * Flags are optionally read from the MethodParameters attribute.
2988 * Names are optionally read from the MethodParameters attribute. If the constant pool index
2989 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute.
2990 * @param mpIndex the index of the parameter in the MethodParameters attribute
2991 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute
2992 */
2993 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) {
2994 long flags = PARAMETER;
2995 Name argName;
2996 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length
2997 && parameterAccessFlags[mpIndex] != 0) {
2998 flags |= parameterAccessFlags[mpIndex];
2999 }
3000 if (parameterNameIndicesMp != null && mpIndex < parameterNameIndicesMp.length
3001 // if name_index is 0, then we might still get a name from the LocalVariableTable
3002 && parameterNameIndicesMp[mpIndex] != 0) {
3003 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty);
3004 flags |= NAME_FILLED;
3005 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length
3006 && parameterNameIndicesLvt[lvtIndex] != 0) {
3007 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty);
3008 flags |= NAME_FILLED;
3009 } else {
3010 String prefix = "arg";
3011 while (true) {
3012 argName = names.fromString(prefix + exclude.size());
3013 if (!exclude.contains(argName))
3014 break;
3015 prefix += "$";
3016 }
3017 }
3018 exclude.add(argName);
3019 return new ParamSymbol(flags, argName, t, owner);
3020 }
3021
3022 /**
3023 * skip n bytes
3024 */
3025 void skipBytes(int n) {
3026 bp = bp + n;
3027 }
3028
3029 /** Skip a field or method
3030 */
3031 void skipMember() {
3032 bp = bp + 6;
3033 char ac = nextChar();
3034 for (int i = 0; i < ac; i++) {
3035 bp = bp + 2;
3036 int attrLen = nextInt();
3037 bp = bp + attrLen;
3038 }
3039 }
3040
3041 void skipInnerClasses() {
3042 int n = nextChar();
3043 for (int i = 0; i < n; i++) {
3044 nextChar();
3045 nextChar();
3046 nextChar();
3047 nextChar();
3048 }
3049 }
3050
3051 /** Enter type variables of this classtype and all enclosing ones in
3052 * `typevars'.
3053 */
3054 protected void enterTypevars(Symbol sym, Type t) {
3055 if (t.getEnclosingType() != null) {
3056 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
3057 enterTypevars(sym.owner, t.getEnclosingType());
3058 }
3059 } else if (sym.kind == MTH && !sym.isStatic()) {
3060 enterTypevars(sym.owner, sym.owner.type);
3061 }
3062 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
3063 typevars.enter(xs.head.tsym);
3064 }
3065 }
3066
3067 protected ClassSymbol enterClass(Name name) {
3068 return syms.enterClass(currentModule, name);
3069 }
3070
3071 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
3072 return syms.enterClass(currentModule, name, owner);
3073 }
3074
3075 /** Read contents of a given class symbol `c'. Both external and internal
3076 * versions of an inner class are read.
3077 */
3078 void readClass(ClassSymbol c) {
3079 ClassType ct = (ClassType)c.type;
3080
3081 // allocate scope for members
3082 c.members_field = WriteableScope.create(c);
3083
3084 // prepare type variable table
3085 typevars = typevars.dup(currentOwner);
3086 if (ct.getEnclosingType().hasTag(CLASS))
3087 enterTypevars(c.owner, ct.getEnclosingType());
3088
3089 // read flags, or skip if this is an inner class
3090 long f = nextChar();
3091 long flags = adjustClassFlags(c, f);
3092 if ((flags & MODULE) == 0) {
3093 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags;
3094 // read own class name and check that it matches
3095 currentModule = c.packge().modle;
3096 ClassSymbol self = poolReader.getClass(nextChar());
3097 if (c != self) {
3098 throw badClassFile("class.file.wrong.class",
3099 self.flatname);
3100 }
3101 } else {
3102 if (majorVersion < Version.V53.major) {
3103 throw badClassFile("anachronistic.module.info",
3104 Integer.toString(majorVersion),
3105 Integer.toString(minorVersion));
3106 }
3107 c.flags_field = flags;
3108 if (c.owner.kind != MDL) {
3109 throw badClassFile("module.info.definition.expected");
3110 }
3111 currentModule = (ModuleSymbol) c.owner;
3112 int this_class = nextChar();
3113 // temp, no check on this_class
3114 }
3115
3116 // class attributes must be read before class
3117 // skip ahead to read class attributes
3118 int startbp = bp;
3119 nextChar();
3120 char interfaceCount = nextChar();
3121 bp += interfaceCount * 2;
3122 char fieldCount = nextChar();
3123 for (int i = 0; i < fieldCount; i++) skipMember();
3124 char methodCount = nextChar();
3125 for (int i = 0; i < methodCount; i++) skipMember();
3126 readClassAttrs(c);
3127
3128 if (!c.getPermittedSubclasses().isEmpty()) {
3129 c.flags_field |= SEALED;
3130 }
3131
3132 // reset and read rest of classinfo
3133 bp = startbp;
3134 int n = nextChar();
3135 if ((flags & MODULE) != 0 && n > 0) {
3136 throw badClassFile("module.info.invalid.super.class");
3137 }
3138 if (ct.supertype_field == null)
3139 ct.supertype_field =
3140 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType);
3141 n = nextChar();
3142 List<Type> is = List.nil();
3143 for (int i = 0; i < n; i++) {
3144 Type _inter = poolReader.getClass(nextChar()).erasure(types);
3145 is = is.prepend(_inter);
3146 }
3147 if (ct.interfaces_field == null)
3148 ct.interfaces_field = is.reverse();
3149
3150 Assert.check(fieldCount == nextChar());
3151 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
3152 Assert.check(methodCount == nextChar());
3153 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
3154 if (c.isRecord()) {
3155 for (RecordComponent rc: c.getRecordComponents()) {
3156 rc.accessor = lookupMethod(c, rc.name, List.nil());
3157 }
3158 }
3159 typevars = typevars.leave();
3160 }
3161
3162 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) {
3163 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) {
3164 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) {
3165 return (MethodSymbol) s;
3166 }
3167 }
3168 return null;
3169 }
3170
3171 /** Read inner class info. For each inner/outer pair allocate a
3172 * member class.
3173 */
3174 void readInnerClasses(ClassSymbol c) {
3175 int n = nextChar();
3176 for (int i = 0; i < n; i++) {
3177 nextChar(); // skip inner class symbol
3178 int outerIdx = nextChar();
3179 int nameIdx = nextChar();
3180 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null);
3181 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty);
3182 if (name == null) name = names.empty;
3183 long flags = adjustClassFlags(c, nextChar());
3184 if (outer != null) { // we have a member class
3185 if (name == names.empty)
3186 name = names.one;
3187 ClassSymbol member = enterClass(name, outer);
3188 if ((flags & STATIC) == 0) {
3189 ((ClassType)member.type).setEnclosingType(outer.type);
3190 if (member.erasure_field != null)
3191 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
3192 }
3193 if (c == outer && member.owner == c) {
3194 member.flags_field = flags;
3195 enterMember(c, member);
3196 }
3197 }
3198 }
3199 }
3200
3201 /** Read a class definition from the bytes in buf.
3202 */
3203 private void readClassBuffer(ClassSymbol c) throws IOException {
3204 int magic = nextInt();
3205 if (magic != JAVA_MAGIC)
3206 throw badClassFile("illegal.start.of.class.file");
3207
3208 minorVersion = nextChar();
3209 majorVersion = nextChar();
3210 int maxMajor = Version.MAX().major;
3211 int maxMinor = Version.MAX().minor;
3212 boolean previewClassFile =
3213 minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3214 if (majorVersion > maxMajor ||
3215 majorVersion * 1000 + minorVersion <
3216 Version.MIN().major * 1000 + Version.MIN().minor) {
3217 if (majorVersion == (maxMajor + 1) && !previewClassFile)
3218 log.warning(Warnings.BigMajorVersion(currentClassFile,
3219 majorVersion,
3220 maxMajor));
3221 else
3222 throw badClassFile("wrong.version",
3223 Integer.toString(majorVersion),
3224 Integer.toString(minorVersion),
3225 Integer.toString(maxMajor),
3226 Integer.toString(maxMinor));
3227 }
3228 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT;
3229
3230 if (previewClassFile) {
3231 if (!preview.isEnabled()) {
3232 log.error(preview.disabledError(currentClassFile, majorVersion));
3233 } else {
3234 preview.warnPreview(c.classfile, majorVersion);
3235 }
3236 }
3237
3238 poolReader = new PoolReader(this, names, syms);
3239 bp = poolReader.readPool(buf, bp);
3240 if (signatureBuffer.length < bp) {
3241 int ns = Integer.highestOneBit(bp) << 1;
3242 signatureBuffer = new byte[ns];
3243 }
3244 readClass(c);
3245 }
3246
3247 public void readClassFile(ClassSymbol c) {
3248 currentOwner = c;
3249 currentClassFile = c.classfile;
3250 warnedAttrs.clear();
3251 filling = true;
3252 target = null;
3253 repeatable = null;
3254 try {
3255 bp = 0;
3256 buf.reset();
3257 try (InputStream input = c.classfile.openInputStream()) {
3258 buf.appendStream(input);
3259 }
3260 readClassBuffer(c);
3261 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
3262 List<Type> missing = missingTypeVariables;
3263 List<Type> found = foundTypeVariables;
3264 missingTypeVariables = List.nil();
3265 foundTypeVariables = List.nil();
3266 interimUses = List.nil();
3267 interimProvides = List.nil();
3268 filling = false;
3269 ClassType ct = (ClassType)currentOwner.type;
3270 ct.supertype_field =
3271 types.subst(ct.supertype_field, missing, found);
3272 ct.interfaces_field =
3273 types.subst(ct.interfaces_field, missing, found);
3274 ct.typarams_field =
3275 types.substBounds(ct.typarams_field, missing, found);
3276 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
3277 types.head.tsym.type = types.head;
3278 }
3279 } else if (missingTypeVariables.isEmpty() !=
3280 foundTypeVariables.isEmpty()) {
3281 Name name = missingTypeVariables.head.tsym.name;
3282 throw badClassFile("undecl.type.var", name);
3283 }
3284
3285 if ((c.flags_field & Flags.ANNOTATION) != 0) {
3286 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
3287 } else {
3288 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
3289 }
3290
3291 if (c == currentModule.module_info) {
3292 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
3293 Assert.check(currentModule.isCompleted());
3294 currentModule.usesProvidesCompleter =
3295 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
3296 } else {
3297 currentModule.uses = List.nil();
3298 currentModule.provides = List.nil();
3299 }
3300 }
3301 } catch (IOException | ClosedFileSystemException ex) {
3302 throw badClassFile("unable.to.access.file", ex.toString());
3303 } catch (ArrayIndexOutOfBoundsException ex) {
3304 throw badClassFile("bad.class.file", c.flatname);
3305 } finally {
3306 interimUses = List.nil();
3307 interimProvides = List.nil();
3308 missingTypeVariables = List.nil();
3309 foundTypeVariables = List.nil();
3310 filling = false;
3311 }
3312 }
3313
3314 /** We can only read a single class file at a time; this
3315 * flag keeps track of when we are currently reading a class
3316 * file.
3317 */
3318 public boolean filling = false;
3319
3320 /* **********************************************************************
3321 * Adjusting flags
3322 ***********************************************************************/
3323
3324 long adjustFieldFlags(long flags) {
3325 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3326 if (allowValueClasses && previewClassFile && (flags & ACC_STRICT) != 0) {
3327 flags &= ~ACC_STRICT;
3328 flags |= STRICT;
3329 }
3330 return flags;
3331 }
3332
3333 long adjustMethodFlags(long flags) {
3334 if ((flags & ACC_BRIDGE) != 0) {
3335 flags &= ~ACC_BRIDGE;
3336 flags |= BRIDGE;
3337 }
3338 if ((flags & ACC_VARARGS) != 0) {
3339 flags &= ~ACC_VARARGS;
3340 flags |= VARARGS;
3341 }
3342 return flags;
3343 }
3344
3345 long adjustClassFlags(ClassSymbol c, long flags) {
3346 if ((flags & ACC_MODULE) != 0) {
3347 flags &= ~ACC_MODULE;
3348 flags |= MODULE;
3349 }
3350 if (((flags & ACC_IDENTITY) != 0 && !isMigratedValueClass(flags)) || (majorVersion < V67.major && (flags & INTERFACE) == 0)) {
3351 flags |= IDENTITY_TYPE;
3352 } else if (needsValueFlag(c, flags)) {
3353 flags |= VALUE_CLASS;
3354 flags &= ~IDENTITY_TYPE;
3355 }
3356 flags &= ~ACC_IDENTITY; // ACC_IDENTITY and SYNCHRONIZED bits overloaded
3357 return flags;
3358 }
3359
3360 private boolean needsValueFlag(Symbol c, long flags) {
3361 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3362 if (allowValueClasses) {
3363 if (previewClassFile && majorVersion >= V67.major && (flags & INTERFACE) == 0 ||
3364 majorVersion >= V67.major && isMigratedValueClass(flags)) {
3365 return true;
3366 }
3367 }
3368 return false;
3369 }
3370
3371 private boolean isMigratedValueClass(long flags) {
3372 return allowValueClasses && ((flags & MIGRATED_VALUE_CLASS) != 0);
3373 }
3374
3375 /**
3376 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
3377 * The attribute is only the last component of the original filename, so is unlikely
3378 * to be valid as is, so operations other than those to access the name throw
3379 * UnsupportedOperationException
3380 */
3381 private static class SourceFileObject implements JavaFileObject {
3382
3383 /** The file's name.
3384 */
3385 private final Name name;
3386
3387 public SourceFileObject(Name name) {
3388 this.name = name;
3389 }
3390
3391 @Override @DefinedBy(Api.COMPILER)
3392 public URI toUri() {
3393 try {
3394 return new URI(null, name.toString(), null);
3395 } catch (URISyntaxException e) {
3396 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
3397 }
3398 }
3399
3400 @Override @DefinedBy(Api.COMPILER)
3401 public String getName() {
3402 return name.toString();
3403 }
3404
3405 @Override @DefinedBy(Api.COMPILER)
3406 public JavaFileObject.Kind getKind() {
3407 return BaseFileManager.getKind(getName());
3408 }
3409
3410 @Override @DefinedBy(Api.COMPILER)
3411 public InputStream openInputStream() {
3412 throw new UnsupportedOperationException();
3413 }
3414
3415 @Override @DefinedBy(Api.COMPILER)
3416 public OutputStream openOutputStream() {
3417 throw new UnsupportedOperationException();
3418 }
3419
3420 @Override @DefinedBy(Api.COMPILER)
3421 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
3422 throw new UnsupportedOperationException();
3423 }
3424
3425 @Override @DefinedBy(Api.COMPILER)
3426 public Reader openReader(boolean ignoreEncodingErrors) {
3427 throw new UnsupportedOperationException();
3428 }
3429
3430 @Override @DefinedBy(Api.COMPILER)
3431 public Writer openWriter() {
3432 throw new UnsupportedOperationException();
3433 }
3434
3435 @Override @DefinedBy(Api.COMPILER)
3436 public long getLastModified() {
3437 throw new UnsupportedOperationException();
3438 }
3439
3440 @Override @DefinedBy(Api.COMPILER)
3441 public boolean delete() {
3442 throw new UnsupportedOperationException();
3443 }
3444
3445 @Override @DefinedBy(Api.COMPILER)
3446 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
3447 return true; // fail-safe mode
3448 }
3449
3450 @Override @DefinedBy(Api.COMPILER)
3451 public NestingKind getNestingKind() {
3452 return null;
3453 }
3454
3455 @Override @DefinedBy(Api.COMPILER)
3456 public Modifier getAccessLevel() {
3457 return null;
3458 }
3459
3460 /**
3461 * Check if two file objects are equal.
3462 * SourceFileObjects are just placeholder objects for the value of a
3463 * SourceFile attribute, and do not directly represent specific files.
3464 * Two SourceFileObjects are equal if their names are equal.
3465 */
3466 @Override
3467 public boolean equals(Object other) {
3468 if (this == other)
3469 return true;
3470 return (other instanceof SourceFileObject sourceFileObject)
3471 && name.equals(sourceFileObject.name);
3472 }
3473
3474 @Override
3475 public int hashCode() {
3476 return name.hashCode();
3477 }
3478 }
3479
3480 private class CompleterDeproxy implements AnnotationTypeCompleter {
3481 ClassSymbol proxyOn;
3482 CompoundAnnotationProxy target;
3483 CompoundAnnotationProxy repeatable;
3484
3485 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
3486 CompoundAnnotationProxy repeatable)
3487 {
3488 this.proxyOn = c;
3489 this.target = target;
3490 this.repeatable = repeatable;
3491 }
3492
3493 @Override
3494 public void complete(ClassSymbol sym) {
3495 Assert.check(proxyOn == sym);
3496 Attribute.Compound theTarget = null, theRepeatable = null;
3497 AnnotationDeproxy deproxy;
3498
3499 try {
3500 if (target != null) {
3501 deproxy = new AnnotationDeproxy(proxyOn);
3502 theTarget = deproxy.deproxyCompound(target);
3503 }
3504
3505 if (repeatable != null) {
3506 deproxy = new AnnotationDeproxy(proxyOn);
3507 theRepeatable = deproxy.deproxyCompound(repeatable);
3508 }
3509 } catch (Exception e) {
3510 throw new CompletionFailure(sym,
3511 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())),
3512 dcfh);
3513 }
3514
3515 sym.getAnnotationTypeMetadata().setTarget(theTarget);
3516 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
3517 }
3518 }
3519
3520 private class ProxyType extends Type {
3521
3522 private final Name name;
3523
3524 public ProxyType(int index) {
3525 super(syms.noSymbol, List.nil());
3526 this.name = poolReader.getName(index);
3527 }
3528
3529 @Override
3530 public TypeTag getTag() {
3531 return TypeTag.NONE;
3532 }
3533
3534 public Type resolve() {
3535 return name.map(ClassReader.this::sigToType);
3536 }
3537
3538 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3539 public String toString() {
3540 return "<ProxyType>";
3541 }
3542
3543 }
3544
3545 private static final class InterimUsesDirective {
3546 public final Name service;
3547
3548 public InterimUsesDirective(Name service) {
3549 this.service = service;
3550 }
3551
3552 }
3553
3554 private static final class InterimProvidesDirective {
3555 public final Name service;
3556 public final List<Name> impls;
3557
3558 public InterimProvidesDirective(Name service, List<Name> impls) {
3559 this.service = service;
3560 this.impls = impls;
3561 }
3562
3563 }
3564
3565 private final class UsesProvidesCompleter implements Completer {
3566 private final ModuleSymbol currentModule;
3567 private final List<InterimUsesDirective> interimUsesCopy;
3568 private final List<InterimProvidesDirective> interimProvidesCopy;
3569
3570 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3571 this.currentModule = currentModule;
3572 this.interimUsesCopy = interimUsesCopy;
3573 this.interimProvidesCopy = interimProvidesCopy;
3574 }
3575
3576 @Override
3577 public void complete(Symbol sym) throws CompletionFailure {
3578 ListBuffer<Directive> directives = new ListBuffer<>();
3579 directives.addAll(currentModule.directives);
3580 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3581 for (InterimUsesDirective interim : interimUsesCopy) {
3582 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3583 uses.add(d);
3584 directives.add(d);
3585 }
3586 currentModule.uses = uses.toList();
3587 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3588 for (InterimProvidesDirective interim : interimProvidesCopy) {
3589 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3590 for (Name impl : interim.impls) {
3591 impls.append(syms.enterClass(currentModule, impl));
3592 }
3593 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3594 impls.toList());
3595 provides.add(d);
3596 directives.add(d);
3597 }
3598 currentModule.provides = provides.toList();
3599 currentModule.directives = directives.toList();
3600 }
3601 }
3602 }