1 /*
2 * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.nio.file.ClosedFileSystemException;
33 import java.util.Arrays;
34 import java.util.EnumSet;
35 import java.util.HashMap;
36 import java.util.HashSet;
37 import java.util.Map;
38 import java.util.Set;
39 import java.util.function.IntFunction;
40 import java.util.function.Predicate;
41 import java.util.stream.IntStream;
42
43 import javax.lang.model.element.Modifier;
44 import javax.lang.model.element.NestingKind;
45 import javax.tools.JavaFileManager;
46 import javax.tools.JavaFileObject;
47
48 import com.sun.tools.javac.code.Source;
49 import com.sun.tools.javac.code.Source.Feature;
50 import com.sun.tools.javac.comp.Annotate;
51 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
52 import com.sun.tools.javac.code.*;
53 import com.sun.tools.javac.code.Directive.*;
54 import com.sun.tools.javac.code.Lint.LintCategory;
55 import com.sun.tools.javac.code.Scope.WriteableScope;
56 import com.sun.tools.javac.code.Symbol.*;
57 import com.sun.tools.javac.code.Symtab;
58 import com.sun.tools.javac.code.Type.*;
59 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
60 import com.sun.tools.javac.file.BaseFileManager;
61 import com.sun.tools.javac.file.PathFileObject;
62 import com.sun.tools.javac.jvm.ClassFile.Version;
63 import com.sun.tools.javac.jvm.PoolConstant.NameAndType;
64 import com.sun.tools.javac.main.Option;
65 import com.sun.tools.javac.resources.CompilerProperties;
66 import com.sun.tools.javac.resources.CompilerProperties.Errors;
67 import com.sun.tools.javac.resources.CompilerProperties.Fragments;
68 import com.sun.tools.javac.resources.CompilerProperties.LintWarnings;
69 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
70 import com.sun.tools.javac.tree.JCTree;
71 import com.sun.tools.javac.util.*;
72 import com.sun.tools.javac.util.ByteBuffer.UnderflowException;
73 import com.sun.tools.javac.util.DefinedBy.Api;
74 import com.sun.tools.javac.util.JCDiagnostic.Fragment;
75
76 import static com.sun.tools.javac.code.Flags.*;
77 import static com.sun.tools.javac.code.Kinds.Kind.*;
78
79 import com.sun.tools.javac.code.Scope.LookupKind;
80
81 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;
82 import static com.sun.tools.javac.code.TypeTag.ARRAY;
83 import static com.sun.tools.javac.code.TypeTag.CLASS;
84 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
85 import static com.sun.tools.javac.jvm.ClassFile.*;
86 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
87
88 import static com.sun.tools.javac.main.Option.PARAMETERS;
89
90 /** This class provides operations to read a classfile into an internal
91 * representation. The internal representation is anchored in a
92 * ClassSymbol which contains in its scope symbol representations
93 * for all other definitions in the classfile. Top-level Classes themselves
94 * appear as members of the scopes of PackageSymbols.
95 *
96 * <p><b>This is NOT part of any supported API.
97 * If you write code that depends on this, you do so at your own risk.
98 * This code and its internal interfaces are subject to change or
99 * deletion without notice.</b>
100 */
101 public class ClassReader {
102 /** The context key for the class reader. */
103 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
104
105 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
106
107 private final Annotate annotate;
108
109 /** Switch: verbose output.
110 */
111 boolean verbose;
112
113 /** Switch: allow modules.
114 */
115 boolean allowModules;
116
117 /** Switch: allow value classes.
118 */
119 boolean allowValueClasses;
120
121 /** Switch: allow sealed
122 */
123 boolean allowSealedTypes;
124
125 /** Switch: allow records
126 */
127 boolean allowRecords;
128
129 /** Switch: warn (instead of error) on illegal UTF-8
130 */
131 boolean warnOnIllegalUtf8;
132
133 /** Switch: preserve parameter names from the variable table.
134 */
135 public boolean saveParameterNames;
136
137 /**
138 * The currently selected profile.
139 */
140 public final Profile profile;
141
142 /** The log to use for verbose output
143 */
144 final Log log;
145
146 /** The symbol table. */
147 Symtab syms;
148
149 /** The root Lint config. */
150 Lint lint;
151
152 Types types;
153
154 /** The name table. */
155 final Names names;
156
157 /** Access to files
158 */
159 private final JavaFileManager fileManager;
160
161 /** Factory for diagnostics
162 */
163 JCDiagnostic.Factory diagFactory;
164
165 DeferredCompletionFailureHandler dcfh;
166
167 /**
168 * Support for preview language features.
169 */
170 Preview preview;
171
172 /** The current scope where type variables are entered.
173 */
174 protected WriteableScope typevars;
175
176 private List<InterimUsesDirective> interimUses = List.nil();
177 private List<InterimProvidesDirective> interimProvides = List.nil();
178
179 /** The path name of the class file currently being read.
180 */
181 protected JavaFileObject currentClassFile = null;
182
183 /** The class or method currently being read.
184 */
185 protected Symbol currentOwner = null;
186
187 /** The module containing the class currently being read.
188 */
189 protected ModuleSymbol currentModule = null;
190
191 /** The buffer containing the currently read class file.
192 */
193 ByteBuffer buf = new ByteBuffer(INITIAL_BUFFER_SIZE);
194
195 /** The current input pointer.
196 */
197 protected int bp;
198
199 /** The pool reader.
200 */
201 PoolReader poolReader;
202
203 /** The major version number of the class file being read. */
204 int majorVersion;
205 /** The minor version number of the class file being read. */
206 int minorVersion;
207
208 /** true if the class file being read is a preview class file. */
209 boolean previewClassFile;
210
211 /** UTF-8 validation level */
212 Convert.Validation utf8validation;
213
214 /** A table to hold the constant pool indices for method parameter
215 * names, as given in LocalVariableTable attributes.
216 */
217 int[] parameterNameIndicesLvt;
218
219 /**
220 * A table to hold the constant pool indices for method parameter
221 * names, as given in the MethodParameters attribute.
222 */
223 int[] parameterNameIndicesMp;
224
225 /**
226 * A table to hold the access flags of the method parameters.
227 */
228 int[] parameterAccessFlags;
229
230 /**
231 * A table to hold the access flags of the method parameters,
232 * for all parameters including synthetic and mandated ones.
233 */
234 int[] allParameterAccessFlags;
235
236 /**
237 * A table to hold annotations for method parameters.
238 */
239 ParameterAnnotations[] parameterAnnotations;
240
241 /**
242 * A holder for parameter annotations.
243 */
244 static class ParameterAnnotations {
245 List<CompoundAnnotationProxy> proxies;
246
247 void add(List<CompoundAnnotationProxy> newAnnotations) {
248 if (proxies == null) {
249 proxies = newAnnotations;
250 } else {
251 proxies = proxies.prependList(newAnnotations);
252 }
253 }
254 }
255
256 /**
257 * The set of attribute names for which warnings have been generated for the current class
258 */
259 Set<Name> warnedAttrs = new HashSet<>();
260
261 /**
262 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
263 * {@code @Target}
264 */
265 CompoundAnnotationProxy target;
266
267 /**
268 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with
269 * {@code @Repeatable}
270 */
271 CompoundAnnotationProxy repeatable;
272
273 /** Get the ClassReader instance for this invocation. */
274 public static ClassReader instance(Context context) {
275 ClassReader instance = context.get(classReaderKey);
276 if (instance == null)
277 instance = new ClassReader(context);
278 return instance;
279 }
280
281 /** Construct a new class reader. */
282 @SuppressWarnings("this-escape")
283 protected ClassReader(Context context) {
284 context.put(classReaderKey, this);
285 annotate = Annotate.instance(context);
286 names = Names.instance(context);
287 syms = Symtab.instance(context);
288 types = Types.instance(context);
289 fileManager = context.get(JavaFileManager.class);
290 if (fileManager == null)
291 throw new AssertionError("FileManager initialization error");
292 diagFactory = JCDiagnostic.Factory.instance(context);
293 dcfh = DeferredCompletionFailureHandler.instance(context);
294
295 log = Log.instance(context);
296
297 Options options = Options.instance(context);
298 verbose = options.isSet(Option.VERBOSE);
299
300 Source source = Source.instance(context);
301 preview = Preview.instance(context);
302 allowModules = Feature.MODULES.allowedInSource(source);
303 allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) &&
304 Feature.VALUE_CLASSES.allowedInSource(source);
305 allowRecords = Feature.RECORDS.allowedInSource(source);
306 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source);
307 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source);
308
309 saveParameterNames = options.isSet(PARAMETERS);
310
311 profile = Profile.instance(context);
312
313 typevars = WriteableScope.create(syms.noSymbol);
314
315 lint = Lint.instance(context);
316
317 initAttributeReaders();
318 }
319
320 /** Add member to class unless it is synthetic.
321 */
322 private void enterMember(ClassSymbol c, Symbol sym) {
323 // Synthetic members are not entered -- reason lost to history (optimization?).
324 // Lambda methods must be entered because they may have inner classes (which reference them)
325 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
326 c.members_field.enter(sym);
327 }
328
329 /* **********************************************************************
330 * Error Diagnoses
331 ***********************************************************************/
332
333 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
334 return badClassFile(diagFactory.fragment(key, args));
335 }
336
337 public ClassFinder.BadClassFile badClassFile(Fragment fragment) {
338 return badClassFile(diagFactory.fragment(fragment));
339 }
340
341 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) {
342 return new ClassFinder.BadClassFile (
343 currentOwner.enclClass(),
344 currentClassFile,
345 diagnostic,
346 diagFactory,
347 dcfh);
348 }
349
350 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) {
351 return new ClassFinder.BadEnclosingMethodAttr (
352 currentOwner.enclClass(),
353 currentClassFile,
354 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)),
355 diagFactory,
356 dcfh);
357 }
358
359 /* **********************************************************************
360 * Buffer Access
361 ***********************************************************************/
362
363 /** Read a character.
364 */
365 char nextChar() {
366 char res;
367 try {
368 res = buf.getChar(bp);
369 } catch (UnderflowException e) {
370 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
371 }
372 bp += 2;
373 return res;
374 }
375
376 /** Read a byte.
377 */
378 int nextByte() {
379 try {
380 return buf.getByte(bp++) & 0xFF;
381 } catch (UnderflowException e) {
382 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
383 }
384 }
385
386 /** Read an integer.
387 */
388 int nextInt() {
389 int res;
390 try {
391 res = buf.getInt(bp);
392 } catch (UnderflowException e) {
393 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
394 }
395 bp += 4;
396 return res;
397 }
398
399 /* **********************************************************************
400 * Constant Pool Access
401 ***********************************************************************/
402
403 /** Read module_flags.
404 */
405 Set<ModuleFlags> readModuleFlags(int flags) {
406 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
407 for (ModuleFlags f : ModuleFlags.values()) {
408 if ((flags & f.value) != 0)
409 set.add(f);
410 }
411 return set;
412 }
413
414 /** Read resolution_flags.
415 */
416 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
417 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
418 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
419 if ((flags & f.value) != 0)
420 set.add(f);
421 }
422 return set;
423 }
424
425 /** Read exports_flags.
426 */
427 Set<ExportsFlag> readExportsFlags(int flags) {
428 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
429 for (ExportsFlag f: ExportsFlag.values()) {
430 if ((flags & f.value) != 0)
431 set.add(f);
432 }
433 return set;
434 }
435
436 /** Read opens_flags.
437 */
438 Set<OpensFlag> readOpensFlags(int flags) {
439 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
440 for (OpensFlag f: OpensFlag.values()) {
441 if ((flags & f.value) != 0)
442 set.add(f);
443 }
444 return set;
445 }
446
447 /** Read requires_flags.
448 */
449 Set<RequiresFlag> readRequiresFlags(int flags) {
450 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
451 for (RequiresFlag f: RequiresFlag.values()) {
452 if ((flags & f.value) != 0)
453 set.add(f);
454 }
455 return set;
456 }
457
458 /* **********************************************************************
459 * Reading Types
460 ***********************************************************************/
461
462 /** The unread portion of the currently read type is
463 * signature[sigp..siglimit-1].
464 */
465 byte[] signature;
466 int sigp;
467 int siglimit;
468 boolean sigEnterPhase = false;
469
470 /** Convert signature to type, where signature is a byte array segment.
471 */
472 Type sigToType(byte[] sig, int offset, int len) {
473 signature = sig;
474 sigp = offset;
475 siglimit = offset + len;
476 return sigToType();
477 }
478
479 /** Convert signature to type, where signature is implicit.
480 */
481 Type sigToType() {
482 switch ((char) signature[sigp]) {
483 case 'T':
484 sigp++;
485 int start = sigp;
486 while (signature[sigp] != ';') sigp++;
487 sigp++;
488 return sigEnterPhase
489 ? Type.noType
490 : findTypeVar(readName(signature, start, sigp - 1 - start));
491 case '+': {
492 sigp++;
493 Type t = sigToType();
494 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
495 }
496 case '*':
497 sigp++;
498 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
499 syms.boundClass);
500 case '-': {
501 sigp++;
502 Type t = sigToType();
503 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
504 }
505 case 'B':
506 sigp++;
507 return syms.byteType;
508 case 'C':
509 sigp++;
510 return syms.charType;
511 case 'D':
512 sigp++;
513 return syms.doubleType;
514 case 'F':
515 sigp++;
516 return syms.floatType;
517 case 'I':
518 sigp++;
519 return syms.intType;
520 case 'J':
521 sigp++;
522 return syms.longType;
523 case 'L':
524 {
525 // int oldsigp = sigp;
526 Type t = classSigToType();
527 if (sigp < siglimit && signature[sigp] == '.')
528 throw badClassFile("deprecated inner class signature syntax " +
529 "(please recompile from source)");
530 /*
531 System.err.println(" decoded " +
532 new String(signature, oldsigp, sigp-oldsigp) +
533 " => " + t + " outer " + t.outer());
534 */
535 return t;
536 }
537 case 'S':
538 sigp++;
539 return syms.shortType;
540 case 'V':
541 sigp++;
542 return syms.voidType;
543 case 'Z':
544 sigp++;
545 return syms.booleanType;
546 case '[':
547 sigp++;
548 return new ArrayType(sigToType(), syms.arrayClass);
549 case '(':
550 sigp++;
551 List<Type> argtypes = sigToTypes(')');
552 Type restype = sigToType();
553 List<Type> thrown = List.nil();
554 while (sigp < siglimit && signature[sigp] == '^') {
555 sigp++;
556 thrown = thrown.prepend(sigToType());
557 }
558 // if there is a typevar in the throws clause we should state it.
559 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
560 if (l.head.hasTag(TYPEVAR)) {
561 l.head.tsym.flags_field |= THROWS;
562 }
563 }
564 return new MethodType(argtypes,
565 restype,
566 thrown.reverse(),
567 syms.methodClass);
568 case '<':
569 typevars = typevars.dup(currentOwner);
570 Type poly = new ForAll(sigToTypeParams(), sigToType());
571 typevars = typevars.leave();
572 return poly;
573 default:
574 throw badClassFile("bad.signature", quoteBadSignature());
575 }
576 }
577
578 byte[] signatureBuffer = new byte[0];
579 int sbp = 0;
580 /** Convert class signature to type, where signature is implicit.
581 */
582 Type classSigToType() {
583 if (signature[sigp] != 'L')
584 throw badClassFile("bad.class.signature", quoteBadSignature());
585 sigp++;
586 Type outer = Type.noType;
587 int startSbp = sbp;
588
589 while (true) {
590 final byte c = signature[sigp++];
591 switch (c) {
592
593 case ';': { // end
594 ClassSymbol t = enterClass(readName(signatureBuffer,
595 startSbp,
596 sbp - startSbp));
597
598 try {
599 if (outer == Type.noType) {
600 ClassType et = (ClassType) t.erasure(types);
601 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata());
602 }
603 return new ClassType(outer, List.nil(), t, List.nil());
604 } finally {
605 sbp = startSbp;
606 }
607 }
608
609 case '<': // generic arguments
610 ClassSymbol t = enterClass(readName(signatureBuffer,
611 startSbp,
612 sbp - startSbp));
613 List<Type> actuals = sigToTypes('>');
614 List<Type> formals = ((ClassType)t.type.tsym.type).typarams_field;
615 if (formals != null) {
616 if (actuals.isEmpty())
617 actuals = formals;
618 }
619 /* actualsCp is final as it will be captured by the inner class below. We could avoid defining
620 * this additional local variable and depend on field ClassType::typarams_field which `actuals` is
621 * assigned to but then we would have a dependendy on the internal representation of ClassType which
622 * could change in the future
623 */
624 final List<Type> actualsCp = actuals;
625 outer = new ClassType(outer, actuals, t, List.nil()) {
626 boolean completed = false;
627 boolean typeArgsSet = false;
628 @Override @DefinedBy(Api.LANGUAGE_MODEL)
629 public Type getEnclosingType() {
630 if (!completed) {
631 completed = true;
632 tsym.apiComplete();
633 Type enclosingType = tsym.type.getEnclosingType();
634 if (enclosingType != Type.noType) {
635 List<Type> typeArgs =
636 super.getEnclosingType().allparams();
637 List<Type> typeParams =
638 enclosingType.allparams();
639 if (typeParams.length() != typeArgs.length()) {
640 // no "rare" types
641 super.setEnclosingType(types.erasure(enclosingType));
642 } else {
643 super.setEnclosingType(types.subst(enclosingType,
644 typeParams,
645 typeArgs));
646 }
647 } else {
648 super.setEnclosingType(Type.noType);
649 }
650 }
651 return super.getEnclosingType();
652 }
653 @Override
654 public void setEnclosingType(Type outer) {
655 throw new UnsupportedOperationException();
656 }
657
658 @Override
659 public List<Type> getTypeArguments() {
660 if (!typeArgsSet) {
661 typeArgsSet = true;
662 List<Type> formalsCp = ((ClassType)t.type.tsym.type).typarams_field;
663 if (formalsCp != null && !formalsCp.isEmpty()) {
664 if (actualsCp.length() == formalsCp.length()) {
665 List<Type> a = actualsCp;
666 List<Type> f = formalsCp;
667 while (a.nonEmpty()) {
668 a.head = a.head.withTypeVar(f.head);
669 a = a.tail;
670 f = f.tail;
671 }
672 }
673 }
674 }
675 return super.getTypeArguments();
676 }
677 };
678 switch (signature[sigp++]) {
679 case ';':
680 if (sigp < siglimit && signature[sigp] == '.') {
681 // support old-style GJC signatures
682 // The signature produced was
683 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
684 // rather than say
685 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
686 // so we skip past ".Lfoo/Outer$"
687 sigp += (sbp - startSbp) + // "foo/Outer"
688 3; // ".L" and "$"
689 signatureBuffer[sbp++] = (byte)'$';
690 break;
691 } else {
692 sbp = startSbp;
693 return outer;
694 }
695 case '.':
696 signatureBuffer[sbp++] = (byte)'$';
697 break;
698 default:
699 throw new AssertionError(signature[sigp-1]);
700 }
701 continue;
702
703 case '.':
704 //we have seen an enclosing non-generic class
705 if (outer != Type.noType) {
706 t = enterClass(readName(signatureBuffer,
707 startSbp,
708 sbp - startSbp));
709 outer = new ClassType(outer, List.nil(), t, List.nil());
710 }
711 signatureBuffer[sbp++] = (byte)'$';
712 continue;
713 case '/':
714 signatureBuffer[sbp++] = (byte)'.';
715 continue;
716 default:
717 signatureBuffer[sbp++] = c;
718 continue;
719 }
720 }
721 }
722
723 /** Quote a bogus signature for display inside an error message.
724 */
725 String quoteBadSignature() {
726 String sigString;
727 try {
728 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE);
729 } catch (InvalidUtfException e) {
730 throw new AssertionError(e);
731 }
732 if (sigString.length() > 32)
733 sigString = sigString.substring(0, 32) + "...";
734 return "\"" + sigString + "\"";
735 }
736
737 /** Convert (implicit) signature to list of types
738 * until `terminator' is encountered.
739 */
740 List<Type> sigToTypes(char terminator) {
741 List<Type> head = List.of(null);
742 List<Type> tail = head;
743 while (signature[sigp] != terminator)
744 tail = tail.setTail(List.of(sigToType()));
745 sigp++;
746 return head.tail;
747 }
748
749 /** Convert signature to type parameters, where signature is a byte
750 * array segment.
751 */
752 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
753 signature = sig;
754 sigp = offset;
755 siglimit = offset + len;
756 return sigToTypeParams();
757 }
758
759 /** Convert signature to type parameters, where signature is implicit.
760 */
761 List<Type> sigToTypeParams() {
762 List<Type> tvars = List.nil();
763 if (signature[sigp] == '<') {
764 sigp++;
765 int start = sigp;
766 sigEnterPhase = true;
767 while (signature[sigp] != '>')
768 tvars = tvars.prepend(sigToTypeParam());
769 sigEnterPhase = false;
770 sigp = start;
771 while (signature[sigp] != '>')
772 sigToTypeParam();
773 sigp++;
774 }
775 return tvars.reverse();
776 }
777
778 /** Convert (implicit) signature to type parameter.
779 */
780 Type sigToTypeParam() {
781 int start = sigp;
782 while (signature[sigp] != ':') sigp++;
783 Name name = readName(signature, start, sigp - start);
784 TypeVar tvar;
785 if (sigEnterPhase) {
786 tvar = new TypeVar(name, currentOwner, syms.botType);
787 typevars.enter(tvar.tsym);
788 } else {
789 tvar = (TypeVar)findTypeVar(name);
790 }
791 List<Type> bounds = List.nil();
792 boolean allInterfaces = false;
793 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
794 sigp++;
795 allInterfaces = true;
796 }
797 while (signature[sigp] == ':') {
798 sigp++;
799 bounds = bounds.prepend(sigToType());
800 }
801 if (!sigEnterPhase) {
802 types.setBounds(tvar, bounds.reverse(), allInterfaces);
803 }
804 return tvar;
805 }
806
807 /** Find type variable with given name in `typevars' scope.
808 */
809 Type findTypeVar(Name name) {
810 Symbol s = typevars.findFirst(name);
811 if (s != null) {
812 return s.type;
813 } else {
814 if (readingClassAttr) {
815 // While reading the class attribute, the supertypes
816 // might refer to a type variable from an enclosing element
817 // (method or class).
818 // If the type variable is defined in the enclosing class,
819 // we can actually find it in
820 // currentOwner.owner.type.getTypeArguments()
821 // However, until we have read the enclosing method attribute
822 // we don't know for sure if this owner is correct. It could
823 // be a method and there is no way to tell before reading the
824 // enclosing method attribute.
825 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
826 missingTypeVariables = missingTypeVariables.prepend(t);
827 // System.err.println("Missing type var " + name);
828 return t;
829 }
830 throw badClassFile("undecl.type.var", name);
831 }
832 }
833
834 private Name readName(byte[] buf, int off, int len) {
835 try {
836 return names.fromUtf(buf, off, len, utf8validation);
837 } catch (InvalidUtfException e) {
838 if (warnOnIllegalUtf8) {
839 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
840 Fragments.BadUtf8ByteSequenceAt(sigp)));
841 return names.fromUtfLax(buf, off, len);
842 }
843 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp));
844 }
845 }
846
847 /* **********************************************************************
848 * Reading Attributes
849 ***********************************************************************/
850
851 protected enum AttributeKind { CLASS, MEMBER }
852
853 protected abstract class AttributeReader {
854 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
855 this.name = name;
856 this.version = version;
857 this.kinds = kinds;
858 }
859
860 protected boolean accepts(AttributeKind kind) {
861 if (kinds.contains(kind)) {
862 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
863 return true;
864
865 if (!warnedAttrs.contains(name)) {
866 JavaFileObject prev = log.useSource(currentClassFile);
867 try {
868 lint.logIfEnabled(
869 LintWarnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion));
870 } finally {
871 log.useSource(prev);
872 }
873 warnedAttrs.add(name);
874 }
875 }
876 return false;
877 }
878
879 protected abstract void read(Symbol sym, int attrLen);
880
881 protected final Name name;
882 protected final ClassFile.Version version;
883 protected final Set<AttributeKind> kinds;
884 }
885
886 protected Set<AttributeKind> CLASS_ATTRIBUTE =
887 EnumSet.of(AttributeKind.CLASS);
888 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
889 EnumSet.of(AttributeKind.MEMBER);
890 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
891 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
892
893 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
894
895 private void initAttributeReaders() {
896 AttributeReader[] readers = {
897 // v45.3 attributes
898
899 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
900 protected void read(Symbol sym, int attrLen) {
901 if (saveParameterNames)
902 ((MethodSymbol)sym).code = readCode(sym);
903 else
904 bp = bp + attrLen;
905 }
906 },
907
908 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
909 protected void read(Symbol sym, int attrLen) {
910 Object v = poolReader.getConstant(nextChar());
911 // Ignore ConstantValue attribute if field not final.
912 if ((sym.flags() & FINAL) == 0) {
913 return;
914 }
915 VarSymbol var = (VarSymbol) sym;
916 switch (var.type.getTag()) {
917 case BOOLEAN:
918 case BYTE:
919 case CHAR:
920 case SHORT:
921 case INT:
922 checkType(var, Integer.class, v);
923 break;
924 case LONG:
925 checkType(var, Long.class, v);
926 break;
927 case FLOAT:
928 checkType(var, Float.class, v);
929 break;
930 case DOUBLE:
931 checkType(var, Double.class, v);
932 break;
933 case CLASS:
934 if (var.type.tsym == syms.stringType.tsym) {
935 checkType(var, String.class, v);
936 } else {
937 throw badClassFile("bad.constant.value.type", var.type);
938 }
939 break;
940 default:
941 // ignore ConstantValue attribute if type is not primitive or String
942 return;
943 }
944 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) {
945 throw badClassFile("bad.constant.range", v, var, var.type);
946 }
947 var.setData(v);
948 }
949
950 void checkType(Symbol var, Class<?> clazz, Object value) {
951 if (!clazz.isInstance(value)) {
952 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName());
953 }
954 }
955 },
956
957 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
958 protected void read(Symbol sym, int attrLen) {
959 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
960
961 s.flags_field |= DEPRECATED;
962 }
963 },
964
965 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
966 protected void read(Symbol sym, int attrLen) {
967 int nexceptions = nextChar();
968 List<Type> thrown = List.nil();
969 for (int j = 0; j < nexceptions; j++)
970 thrown = thrown.prepend(poolReader.getClass(nextChar()).type);
971 if (sym.type.getThrownTypes().isEmpty())
972 sym.type.asMethodType().thrown = thrown.reverse();
973 }
974 },
975
976 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
977 protected void read(Symbol sym, int attrLen) {
978 ClassSymbol c = (ClassSymbol) sym;
979 if (currentModule.module_info == c) {
980 //prevent entering the classes too soon:
981 skipInnerClasses();
982 } else {
983 readInnerClasses(c);
984 }
985 }
986 },
987
988 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
989 protected void read(Symbol sym, int attrLen) {
990 int newbp = bp + attrLen;
991 if (saveParameterNames) {
992 // Pick up parameter names from the variable table.
993 // Parameter names are not explicitly identified as such,
994 // but all parameter name entries in the LocalVariableTable
995 // have a start_pc of 0. Therefore, we record the name
996 // indices of all slots with a start_pc of zero in the
997 // parameterNameIndices array.
998 // Note that this implicitly honors the JVMS spec that
999 // there may be more than one LocalVariableTable, and that
1000 // there is no specified ordering for the entries.
1001 int numEntries = nextChar();
1002 for (int i = 0; i < numEntries; i++) {
1003 int start_pc = nextChar();
1004 int length = nextChar();
1005 int nameIndex = nextChar();
1006 int sigIndex = nextChar();
1007 int register = nextChar();
1008 if (start_pc == 0) {
1009 // ensure array large enough
1010 if (register >= parameterNameIndicesLvt.length) {
1011 int newSize =
1012 Math.max(register + 1, parameterNameIndicesLvt.length + 8);
1013 parameterNameIndicesLvt =
1014 Arrays.copyOf(parameterNameIndicesLvt, newSize);
1015 }
1016 parameterNameIndicesLvt[register] = nameIndex;
1017 }
1018 }
1019 }
1020 bp = newbp;
1021 }
1022 },
1023
1024 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1025 protected void read(Symbol sym, int attrLen) {
1026 ClassSymbol c = (ClassSymbol) sym;
1027 Name n = poolReader.getName(nextChar());
1028 c.sourcefile = new SourceFileObject(n);
1029 // If the class is a toplevel class, originating from a Java source file,
1030 // but the class name does not match the file name, then it is
1031 // an auxiliary class.
1032 String sn = n.toString();
1033 if (c.owner.kind == PCK &&
1034 sn.endsWith(".java") &&
1035 !sn.equals(c.name.toString()+".java")) {
1036 c.flags_field |= AUXILIARY;
1037 }
1038 }
1039 },
1040
1041 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1042 protected void read(Symbol sym, int attrLen) {
1043 sym.flags_field |= SYNTHETIC;
1044 }
1045 },
1046
1047 // standard v49 attributes
1048
1049 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1050 protected void read(Symbol sym, int attrLen) {
1051 int newbp = bp + attrLen;
1052 readEnclosingMethodAttr(sym);
1053 bp = newbp;
1054 }
1055 },
1056
1057 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1058 protected void read(Symbol sym, int attrLen) {
1059 if (sym.kind == TYP) {
1060 ClassSymbol c = (ClassSymbol) sym;
1061 readingClassAttr = true;
1062 try {
1063 ClassType ct1 = (ClassType)c.type;
1064 Assert.check(c == currentOwner);
1065 ct1.typarams_field = poolReader.getName(nextChar())
1066 .map(ClassReader.this::sigToTypeParams);
1067 ct1.supertype_field = sigToType();
1068 ListBuffer<Type> is = new ListBuffer<>();
1069 while (sigp != siglimit) is.append(sigToType());
1070 ct1.interfaces_field = is.toList();
1071 } finally {
1072 readingClassAttr = false;
1073 }
1074 } else {
1075 List<Type> thrown = sym.type.getThrownTypes();
1076 sym.type = poolReader.getType(nextChar());
1077 //- System.err.println(" # " + sym.type);
1078 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1079 sym.type.asMethodType().thrown = thrown;
1080
1081 }
1082 }
1083 },
1084
1085 // v49 annotation attributes
1086
1087 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1088 protected void read(Symbol sym, int attrLen) {
1089 attachAnnotationDefault(sym);
1090 }
1091 },
1092
1093 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1094 protected void read(Symbol sym, int attrLen) {
1095 attachAnnotations(sym);
1096 }
1097 },
1098
1099 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1100 protected void read(Symbol sym, int attrLen) {
1101 readParameterAnnotations(sym);
1102 }
1103 },
1104
1105 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1106 protected void read(Symbol sym, int attrLen) {
1107 attachAnnotations(sym);
1108 }
1109 },
1110
1111 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1112 protected void read(Symbol sym, int attrLen) {
1113 readParameterAnnotations(sym);
1114 }
1115 },
1116
1117 // additional "legacy" v49 attributes, superseded by flags
1118
1119 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1120 protected void read(Symbol sym, int attrLen) {
1121 sym.flags_field |= ANNOTATION;
1122 }
1123 },
1124
1125 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1126 protected void read(Symbol sym, int attrLen) {
1127 sym.flags_field |= BRIDGE;
1128 }
1129 },
1130
1131 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1132 protected void read(Symbol sym, int attrLen) {
1133 sym.flags_field |= ENUM;
1134 }
1135 },
1136
1137 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1138 protected void read(Symbol sym, int attrLen) {
1139 sym.flags_field |= VARARGS;
1140 }
1141 },
1142
1143 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1144 protected void read(Symbol sym, int attrLen) {
1145 attachTypeAnnotations(sym);
1146 }
1147 },
1148
1149 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1150 protected void read(Symbol sym, int attrLen) {
1151 attachTypeAnnotations(sym);
1152 }
1153 },
1154
1155 // The following attributes for a Code attribute are not currently handled
1156 // StackMapTable
1157 // SourceDebugExtension
1158 // LineNumberTable
1159 // LocalVariableTypeTable
1160
1161 // standard v52 attributes
1162
1163 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1164 protected void read(Symbol sym, int attrlen) {
1165 int newbp = bp + attrlen;
1166 if (saveParameterNames) {
1167 int numEntries = nextByte();
1168 allParameterAccessFlags = new int[numEntries];
1169 parameterNameIndicesMp = new int[numEntries];
1170 parameterAccessFlags = new int[numEntries];
1171 int allParamIndex = 0;
1172 int index = 0;
1173 for (int i = 0; i < numEntries; i++) {
1174 int nameIndex = nextChar();
1175 int flags = nextChar();
1176 allParameterAccessFlags[allParamIndex++] = flags;
1177 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) {
1178 continue;
1179 }
1180 parameterNameIndicesMp[index] = nameIndex;
1181 parameterAccessFlags[index] = flags;
1182 index++;
1183 }
1184 }
1185 bp = newbp;
1186 }
1187 },
1188
1189 // standard v53 attributes
1190
1191 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1192 @Override
1193 protected boolean accepts(AttributeKind kind) {
1194 return super.accepts(kind) && allowModules;
1195 }
1196 protected void read(Symbol sym, int attrLen) {
1197 if (sym.kind == TYP && sym.owner.kind == MDL) {
1198 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1199 ListBuffer<Directive> directives = new ListBuffer<>();
1200
1201 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName);
1202 if (currentModule.name != moduleName) {
1203 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1204 }
1205
1206 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar());
1207 msym.flags.addAll(moduleFlags);
1208 msym.version = optPoolEntry(nextChar(), poolReader::getName, null);
1209
1210 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1211 int nrequires = nextChar();
1212 for (int i = 0; i < nrequires; i++) {
1213 ModuleSymbol rsym = poolReader.getModule(nextChar());
1214 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1215 if (rsym == syms.java_base && majorVersion >= V54.major) {
1216 if (flags.contains(RequiresFlag.TRANSITIVE) &&
1217 (majorVersion != Version.MAX().major || !previewClassFile) &&
1218 !preview.participatesInPreview(syms, msym)) {
1219 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE);
1220 }
1221 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1222 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1223 }
1224 }
1225 nextChar(); // skip compiled version
1226 requires.add(new RequiresDirective(rsym, flags));
1227 }
1228 msym.requires = requires.toList();
1229 directives.addAll(msym.requires);
1230
1231 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1232 int nexports = nextChar();
1233 for (int i = 0; i < nexports; i++) {
1234 PackageSymbol p = poolReader.getPackage(nextChar());
1235 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1236 int nto = nextChar();
1237 List<ModuleSymbol> to;
1238 if (nto == 0) {
1239 to = null;
1240 } else {
1241 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1242 for (int t = 0; t < nto; t++)
1243 lb.append(poolReader.getModule(nextChar()));
1244 to = lb.toList();
1245 }
1246 exports.add(new ExportsDirective(p, to, flags));
1247 }
1248 msym.exports = exports.toList();
1249 directives.addAll(msym.exports);
1250 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1251 int nopens = nextChar();
1252 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1253 throw badClassFile("module.non.zero.opens", currentModule.name);
1254 }
1255 for (int i = 0; i < nopens; i++) {
1256 PackageSymbol p = poolReader.getPackage(nextChar());
1257 Set<OpensFlag> flags = readOpensFlags(nextChar());
1258 int nto = nextChar();
1259 List<ModuleSymbol> to;
1260 if (nto == 0) {
1261 to = null;
1262 } else {
1263 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1264 for (int t = 0; t < nto; t++)
1265 lb.append(poolReader.getModule(nextChar()));
1266 to = lb.toList();
1267 }
1268 opens.add(new OpensDirective(p, to, flags));
1269 }
1270 msym.opens = opens.toList();
1271 directives.addAll(msym.opens);
1272
1273 msym.directives = directives.toList();
1274
1275 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1276 int nuses = nextChar();
1277 for (int i = 0; i < nuses; i++) {
1278 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1279 uses.add(new InterimUsesDirective(srvc));
1280 }
1281 interimUses = uses.toList();
1282
1283 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1284 int nprovides = nextChar();
1285 for (int p = 0; p < nprovides; p++) {
1286 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1287 int nimpls = nextChar();
1288 ListBuffer<Name> impls = new ListBuffer<>();
1289 for (int i = 0; i < nimpls; i++) {
1290 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper));
1291 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1292 }
1293 }
1294 interimProvides = provides.toList();
1295 }
1296 }
1297
1298 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException {
1299 byte[] buf = ClassFile.internalize(arr, offset, length);
1300 try {
1301 return names.fromUtf(buf, 0, buf.length, utf8validation);
1302 } catch (InvalidUtfException e) {
1303 if (warnOnIllegalUtf8) {
1304 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
1305 Fragments.BadUtf8ByteSequenceAt(e.getOffset())));
1306 return names.fromUtfLax(buf, 0, buf.length);
1307 }
1308 throw e;
1309 }
1310 }
1311 },
1312
1313 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1314 @Override
1315 protected boolean accepts(AttributeKind kind) {
1316 return super.accepts(kind) && allowModules;
1317 }
1318 protected void read(Symbol sym, int attrLen) {
1319 if (sym.kind == TYP && sym.owner.kind == MDL) {
1320 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1321 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1322 }
1323 }
1324 },
1325
1326 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) {
1327 @Override
1328 protected boolean accepts(AttributeKind kind) {
1329 return super.accepts(kind) && allowRecords;
1330 }
1331 protected void read(Symbol sym, int attrLen) {
1332 if (sym.kind == TYP) {
1333 sym.flags_field |= RECORD;
1334 }
1335 int componentCount = nextChar();
1336 ListBuffer<RecordComponent> components = new ListBuffer<>();
1337 for (int i = 0; i < componentCount; i++) {
1338 Name name = poolReader.getName(nextChar());
1339 Type type = poolReader.getType(nextChar());
1340 RecordComponent c = new RecordComponent(name, type, sym);
1341 readAttrs(c, AttributeKind.MEMBER);
1342 components.add(c);
1343 }
1344 ((ClassSymbol) sym).setRecordComponents(components.toList());
1345 }
1346 },
1347 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) {
1348 @Override
1349 protected boolean accepts(AttributeKind kind) {
1350 return super.accepts(kind) && allowSealedTypes;
1351 }
1352 protected void read(Symbol sym, int attrLen) {
1353 if (sym.kind == TYP) {
1354 ListBuffer<Symbol> subtypes = new ListBuffer<>();
1355 int numberOfPermittedSubtypes = nextChar();
1356 for (int i = 0; i < numberOfPermittedSubtypes; i++) {
1357 subtypes.add(poolReader.getClass(nextChar()));
1358 }
1359 ((ClassSymbol)sym).setPermittedSubclasses(subtypes.toList());
1360 }
1361 }
1362 },
1363 };
1364
1365 for (AttributeReader r: readers)
1366 attributeReaders.put(r.name, r);
1367 }
1368
1369 protected void readEnclosingMethodAttr(Symbol sym) {
1370 // sym is a nested class with an "Enclosing Method" attribute
1371 // remove sym from it's current owners scope and place it in
1372 // the scope specified by the attribute
1373 sym.owner.members().remove(sym);
1374 ClassSymbol self = (ClassSymbol)sym;
1375 ClassSymbol c = poolReader.getClass(nextChar());
1376 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null);
1377
1378 if (c.members_field == null || c.kind != TYP)
1379 throw badClassFile("bad.enclosing.class", self, c);
1380
1381 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1382 if (nt != null && m == null)
1383 throw badEnclosingMethod(self);
1384
1385 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1386 self.owner = m != null ? m : c;
1387 if (self.name.isEmpty())
1388 self.fullname = names.empty;
1389 else
1390 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1391
1392 if (m != null) {
1393 ((ClassType)sym.type).setEnclosingType(m.type);
1394 } else if ((self.flags_field & STATIC) == 0) {
1395 ((ClassType)sym.type).setEnclosingType(c.type);
1396 } else {
1397 ((ClassType)sym.type).setEnclosingType(Type.noType);
1398 }
1399 enterTypevars(self, self.type);
1400 if (!missingTypeVariables.isEmpty()) {
1401 ListBuffer<Type> typeVars = new ListBuffer<>();
1402 for (Type typevar : missingTypeVariables) {
1403 typeVars.append(findTypeVar(typevar.tsym.name));
1404 }
1405 foundTypeVariables = typeVars.toList();
1406 } else {
1407 foundTypeVariables = List.nil();
1408 }
1409 }
1410
1411 // See java.lang.Class
1412 private Name simpleBinaryName(Name self, Name enclosing) {
1413 if (!self.startsWith(enclosing)) {
1414 throw badClassFile("bad.enclosing.method", self);
1415 }
1416
1417 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1418 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1419 throw badClassFile("bad.enclosing.method", self);
1420 int index = 1;
1421 while (index < simpleBinaryName.length() &&
1422 isAsciiDigit(simpleBinaryName.charAt(index)))
1423 index++;
1424 return names.fromString(simpleBinaryName.substring(index));
1425 }
1426
1427 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1428 if (nt == null)
1429 return null;
1430
1431 MethodType type = nt.type.asMethodType();
1432
1433 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1434 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1435 return (MethodSymbol)sym;
1436 }
1437
1438 if (nt.name != names.init)
1439 // not a constructor
1440 return null;
1441 if ((flags & INTERFACE) != 0)
1442 // no enclosing instance
1443 return null;
1444 if (nt.type.getParameterTypes().isEmpty())
1445 // no parameters
1446 return null;
1447
1448 // A constructor of an inner class.
1449 // Remove the first argument (the enclosing instance)
1450 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail,
1451 nt.type.getReturnType(),
1452 nt.type.getThrownTypes(),
1453 syms.methodClass));
1454 // Try searching again
1455 return findMethod(nt, scope, flags);
1456 }
1457
1458 /** Similar to Types.isSameType but avoids completion */
1459 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1460 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1461 .prepend(types.erasure(mt1.getReturnType()));
1462 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1463 while (!types1.isEmpty() && !types2.isEmpty()) {
1464 if (types1.head.tsym != types2.head.tsym)
1465 return false;
1466 types1 = types1.tail;
1467 types2 = types2.tail;
1468 }
1469 return types1.isEmpty() && types2.isEmpty();
1470 }
1471
1472 /**
1473 * Character.isDigit answers <tt>true</tt> to some non-ascii
1474 * digits. This one does not. <b>copied from java.lang.Class</b>
1475 */
1476 private static boolean isAsciiDigit(char c) {
1477 return '0' <= c && c <= '9';
1478 }
1479
1480 /** Read member attributes.
1481 */
1482 void readMemberAttrs(Symbol sym) {
1483 readAttrs(sym, AttributeKind.MEMBER);
1484 }
1485
1486 void readAttrs(Symbol sym, AttributeKind kind) {
1487 char ac = nextChar();
1488 for (int i = 0; i < ac; i++) {
1489 Name attrName = poolReader.getName(nextChar());
1490 int attrLen = nextInt();
1491 AttributeReader r = attributeReaders.get(attrName);
1492 if (r != null && r.accepts(kind))
1493 r.read(sym, attrLen);
1494 else {
1495 bp = bp + attrLen;
1496 }
1497 }
1498 }
1499
1500 private boolean readingClassAttr = false;
1501 private List<Type> missingTypeVariables = List.nil();
1502 private List<Type> foundTypeVariables = List.nil();
1503
1504 /** Read class attributes.
1505 */
1506 void readClassAttrs(ClassSymbol c) {
1507 readAttrs(c, AttributeKind.CLASS);
1508 }
1509
1510 /** Read code block.
1511 */
1512 Code readCode(Symbol owner) {
1513 nextChar(); // max_stack
1514 nextChar(); // max_locals
1515 final int code_length = nextInt();
1516 bp += code_length;
1517 final char exception_table_length = nextChar();
1518 bp += exception_table_length * 8;
1519 readMemberAttrs(owner);
1520 return null;
1521 }
1522
1523 /* **********************************************************************
1524 * Reading Java-language annotations
1525 ***********************************************************************/
1526
1527 /**
1528 * Save annotations.
1529 */
1530 List<CompoundAnnotationProxy> readAnnotations() {
1531 int numAttributes = nextChar();
1532 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1533 for (int i = 0; i < numAttributes; i++) {
1534 annotations.append(readCompoundAnnotation());
1535 }
1536 return annotations.toList();
1537 }
1538
1539 /** Attach annotations.
1540 */
1541 void attachAnnotations(final Symbol sym) {
1542 attachAnnotations(sym, readAnnotations());
1543 }
1544
1545 /**
1546 * Attach annotations.
1547 */
1548 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1549 if (annotations.isEmpty()) {
1550 return;
1551 }
1552 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1553 for (CompoundAnnotationProxy proxy : annotations) {
1554 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName())
1555 sym.flags_field |= PROPRIETARY;
1556 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) {
1557 if (profile != Profile.DEFAULT) {
1558 for (Pair<Name, Attribute> v : proxy.values) {
1559 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) {
1560 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) {
1561 sym.flags_field |= NOT_IN_PROFILE;
1562 }
1563 }
1564 }
1565 }
1566 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) {
1567 sym.flags_field |= PREVIEW_API;
1568 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1569 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) {
1570 Assert.check(sym.kind == TYP);
1571 sym.flags_field |= VALUE_BASED;
1572 } else if (proxy.type.tsym.flatName() == syms.migratedValueClassInternalType.tsym.flatName()) {
1573 Assert.check(sym.kind == TYP);
1574 sym.flags_field |= MIGRATED_VALUE_CLASS;
1575 if (needsValueFlag(sym, sym.flags_field)) {
1576 sym.flags_field |= VALUE_CLASS;
1577 sym.flags_field &= ~IDENTITY_TYPE;
1578 }
1579 } else if (proxy.type.tsym.flatName() == syms.restrictedInternalType.tsym.flatName()) {
1580 Assert.check(sym.kind == MTH);
1581 sym.flags_field |= RESTRICTED;
1582 } else {
1583 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1584 target = proxy;
1585 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1586 repeatable = proxy;
1587 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1588 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1589 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL);
1590 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) {
1591 sym.flags_field |= PREVIEW_API;
1592 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1593 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) {
1594 sym.flags_field |= VALUE_BASED;
1595 } else if (proxy.type.tsym == syms.migratedValueClassType.tsym && sym.kind == TYP) {
1596 sym.flags_field |= MIGRATED_VALUE_CLASS;
1597 if (needsValueFlag(sym, sym.flags_field)) {
1598 sym.flags_field |= VALUE_CLASS;
1599 sym.flags_field &= ~IDENTITY_TYPE;
1600 }
1601 } else if (proxy.type.tsym == syms.restrictedType.tsym) {
1602 Assert.check(sym.kind == MTH);
1603 sym.flags_field |= RESTRICTED;
1604 }
1605 proxies.append(proxy);
1606 }
1607 }
1608 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1609 }
1610 //where:
1611 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) {
1612 for (Pair<Name, Attribute> v : proxy.values) {
1613 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) {
1614 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
1615 sym.flags_field |= flag;
1616 }
1617 }
1618 }
1619 }
1620
1621 /** Read parameter annotations.
1622 */
1623 void readParameterAnnotations(Symbol meth) {
1624 int numParameters;
1625 try {
1626 numParameters = buf.getByte(bp++) & 0xFF;
1627 } catch (UnderflowException e) {
1628 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1629 }
1630 if (parameterAnnotations == null) {
1631 parameterAnnotations = new ParameterAnnotations[numParameters];
1632 } else if (parameterAnnotations.length != numParameters) {
1633 //the RuntimeVisibleParameterAnnotations and RuntimeInvisibleParameterAnnotations
1634 //provide annotations for a different number of parameters, ignore:
1635 lint.logIfEnabled(LintWarnings.RuntimeVisibleInvisibleParamAnnotationsMismatch(currentClassFile));
1636 for (int pnum = 0; pnum < numParameters; pnum++) {
1637 readAnnotations();
1638 }
1639 parameterAnnotations = null;
1640 return ;
1641 }
1642 for (int pnum = 0; pnum < numParameters; pnum++) {
1643 if (parameterAnnotations[pnum] == null) {
1644 parameterAnnotations[pnum] = new ParameterAnnotations();
1645 }
1646 parameterAnnotations[pnum].add(readAnnotations());
1647 }
1648 }
1649
1650 void attachTypeAnnotations(final Symbol sym) {
1651 int numAttributes = nextChar();
1652 if (numAttributes != 0) {
1653 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1654 for (int i = 0; i < numAttributes; i++)
1655 proxies.append(readTypeAnnotation());
1656 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1657 }
1658 }
1659
1660 /** Attach the default value for an annotation element.
1661 */
1662 void attachAnnotationDefault(final Symbol sym) {
1663 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1664 final Attribute value = readAttributeValue();
1665
1666 // The default value is set later during annotation. It might
1667 // be the case that the Symbol sym is annotated _after_ the
1668 // repeating instances that depend on this default value,
1669 // because of this we set an interim value that tells us this
1670 // element (most likely) has a default.
1671 //
1672 // Set interim value for now, reset just before we do this
1673 // properly at annotate time.
1674 meth.defaultValue = value;
1675 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1676 }
1677
1678 Type readTypeOrClassSymbol(int i) {
1679 return readTypeToProxy(i);
1680 }
1681 Type readTypeToProxy(int i) {
1682 if (currentModule.module_info == currentOwner) {
1683 return new ProxyType(i);
1684 } else {
1685 return poolReader.getType(i);
1686 }
1687 }
1688
1689 CompoundAnnotationProxy readCompoundAnnotation() {
1690 Type t;
1691 if (currentModule.module_info == currentOwner) {
1692 int cpIndex = nextChar();
1693 t = new ProxyType(cpIndex);
1694 } else {
1695 t = readTypeOrClassSymbol(nextChar());
1696 }
1697 int numFields = nextChar();
1698 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1699 for (int i=0; i<numFields; i++) {
1700 Name name = poolReader.getName(nextChar());
1701 Attribute value = readAttributeValue();
1702 pairs.append(new Pair<>(name, value));
1703 }
1704 return new CompoundAnnotationProxy(t, pairs.toList());
1705 }
1706
1707 TypeAnnotationProxy readTypeAnnotation() {
1708 TypeAnnotationPosition position = readPosition();
1709 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1710
1711 return new TypeAnnotationProxy(proxy, position);
1712 }
1713
1714 TypeAnnotationPosition readPosition() {
1715 int tag = nextByte(); // TargetType tag is a byte
1716
1717 if (!TargetType.isValidTargetTypeValue(tag))
1718 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1719
1720 TargetType type = TargetType.fromTargetTypeValue(tag);
1721
1722 switch (type) {
1723 // instanceof
1724 case INSTANCEOF: {
1725 final int offset = nextChar();
1726 final TypeAnnotationPosition position =
1727 TypeAnnotationPosition.instanceOf(readTypePath());
1728 position.offset = offset;
1729 return position;
1730 }
1731 // new expression
1732 case NEW: {
1733 final int offset = nextChar();
1734 final TypeAnnotationPosition position =
1735 TypeAnnotationPosition.newObj(readTypePath());
1736 position.offset = offset;
1737 return position;
1738 }
1739 // constructor/method reference receiver
1740 case CONSTRUCTOR_REFERENCE: {
1741 final int offset = nextChar();
1742 final TypeAnnotationPosition position =
1743 TypeAnnotationPosition.constructorRef(readTypePath());
1744 position.offset = offset;
1745 return position;
1746 }
1747 case METHOD_REFERENCE: {
1748 final int offset = nextChar();
1749 final TypeAnnotationPosition position =
1750 TypeAnnotationPosition.methodRef(readTypePath());
1751 position.offset = offset;
1752 return position;
1753 }
1754 // local variable
1755 case LOCAL_VARIABLE: {
1756 final int table_length = nextChar();
1757 final int[] newLvarOffset = new int[table_length];
1758 final int[] newLvarLength = new int[table_length];
1759 final int[] newLvarIndex = new int[table_length];
1760
1761 for (int i = 0; i < table_length; ++i) {
1762 newLvarOffset[i] = nextChar();
1763 newLvarLength[i] = nextChar();
1764 newLvarIndex[i] = nextChar();
1765 }
1766
1767 final TypeAnnotationPosition position =
1768 TypeAnnotationPosition.localVariable(readTypePath());
1769 position.lvarOffset = newLvarOffset;
1770 position.lvarLength = newLvarLength;
1771 position.lvarIndex = newLvarIndex;
1772 return position;
1773 }
1774 // resource variable
1775 case RESOURCE_VARIABLE: {
1776 final int table_length = nextChar();
1777 final int[] newLvarOffset = new int[table_length];
1778 final int[] newLvarLength = new int[table_length];
1779 final int[] newLvarIndex = new int[table_length];
1780
1781 for (int i = 0; i < table_length; ++i) {
1782 newLvarOffset[i] = nextChar();
1783 newLvarLength[i] = nextChar();
1784 newLvarIndex[i] = nextChar();
1785 }
1786
1787 final TypeAnnotationPosition position =
1788 TypeAnnotationPosition.resourceVariable(readTypePath());
1789 position.lvarOffset = newLvarOffset;
1790 position.lvarLength = newLvarLength;
1791 position.lvarIndex = newLvarIndex;
1792 return position;
1793 }
1794 // exception parameter
1795 case EXCEPTION_PARAMETER: {
1796 final int exception_index = nextChar();
1797 final TypeAnnotationPosition position =
1798 TypeAnnotationPosition.exceptionParameter(readTypePath());
1799 position.setExceptionIndex(exception_index);
1800 return position;
1801 }
1802 // method receiver
1803 case METHOD_RECEIVER:
1804 return TypeAnnotationPosition.methodReceiver(readTypePath());
1805 // type parameter
1806 case CLASS_TYPE_PARAMETER: {
1807 final int parameter_index = nextByte();
1808 return TypeAnnotationPosition
1809 .typeParameter(readTypePath(), parameter_index);
1810 }
1811 case METHOD_TYPE_PARAMETER: {
1812 final int parameter_index = nextByte();
1813 return TypeAnnotationPosition
1814 .methodTypeParameter(readTypePath(), parameter_index);
1815 }
1816 // type parameter bound
1817 case CLASS_TYPE_PARAMETER_BOUND: {
1818 final int parameter_index = nextByte();
1819 final int bound_index = nextByte();
1820 return TypeAnnotationPosition
1821 .typeParameterBound(readTypePath(), parameter_index,
1822 bound_index);
1823 }
1824 case METHOD_TYPE_PARAMETER_BOUND: {
1825 final int parameter_index = nextByte();
1826 final int bound_index = nextByte();
1827 return TypeAnnotationPosition
1828 .methodTypeParameterBound(readTypePath(), parameter_index,
1829 bound_index);
1830 }
1831 // class extends or implements clause
1832 case CLASS_EXTENDS: {
1833 final int type_index = nextChar();
1834 return TypeAnnotationPosition.classExtends(readTypePath(),
1835 type_index);
1836 }
1837 // throws
1838 case THROWS: {
1839 final int type_index = nextChar();
1840 return TypeAnnotationPosition.methodThrows(readTypePath(),
1841 type_index);
1842 }
1843 // method parameter
1844 case METHOD_FORMAL_PARAMETER: {
1845 final int parameter_index = nextByte();
1846 return TypeAnnotationPosition.methodParameter(readTypePath(),
1847 parameter_index);
1848 }
1849 // type cast
1850 case CAST: {
1851 final int offset = nextChar();
1852 final int type_index = nextByte();
1853 final TypeAnnotationPosition position =
1854 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1855 position.offset = offset;
1856 return position;
1857 }
1858 // method/constructor/reference type argument
1859 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1860 final int offset = nextChar();
1861 final int type_index = nextByte();
1862 final TypeAnnotationPosition position = TypeAnnotationPosition
1863 .constructorInvocationTypeArg(readTypePath(), type_index);
1864 position.offset = offset;
1865 return position;
1866 }
1867 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1868 final int offset = nextChar();
1869 final int type_index = nextByte();
1870 final TypeAnnotationPosition position = TypeAnnotationPosition
1871 .methodInvocationTypeArg(readTypePath(), type_index);
1872 position.offset = offset;
1873 return position;
1874 }
1875 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1876 final int offset = nextChar();
1877 final int type_index = nextByte();
1878 final TypeAnnotationPosition position = TypeAnnotationPosition
1879 .constructorRefTypeArg(readTypePath(), type_index);
1880 position.offset = offset;
1881 return position;
1882 }
1883 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1884 final int offset = nextChar();
1885 final int type_index = nextByte();
1886 final TypeAnnotationPosition position = TypeAnnotationPosition
1887 .methodRefTypeArg(readTypePath(), type_index);
1888 position.offset = offset;
1889 return position;
1890 }
1891 // We don't need to worry about these
1892 case METHOD_RETURN:
1893 return TypeAnnotationPosition.methodReturn(readTypePath());
1894 case FIELD:
1895 return TypeAnnotationPosition.field(readTypePath());
1896 case UNKNOWN:
1897 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1898 default:
1899 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1900 }
1901 }
1902
1903 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1904 int len = nextByte();
1905 ListBuffer<Integer> loc = new ListBuffer<>();
1906 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1907 loc = loc.append(nextByte());
1908
1909 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1910
1911 }
1912
1913 /**
1914 * Helper function to read an optional pool entry (with given function); this is used while parsing
1915 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor,
1916 * as per JVMS.
1917 */
1918 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) {
1919 return (index == 0) ?
1920 defaultValue :
1921 poolFunc.apply(index);
1922 }
1923
1924 Attribute readAttributeValue() {
1925 char c;
1926 try {
1927 c = (char)buf.getByte(bp++);
1928 } catch (UnderflowException e) {
1929 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1930 }
1931 switch (c) {
1932 case 'B':
1933 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar()));
1934 case 'C':
1935 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar()));
1936 case 'D':
1937 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar()));
1938 case 'F':
1939 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar()));
1940 case 'I':
1941 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar()));
1942 case 'J':
1943 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar()));
1944 case 'S':
1945 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar()));
1946 case 'Z':
1947 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar()));
1948 case 's':
1949 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString());
1950 case 'e':
1951 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar()));
1952 case 'c':
1953 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1954 case '[': {
1955 int n = nextChar();
1956 ListBuffer<Attribute> l = new ListBuffer<>();
1957 for (int i=0; i<n; i++)
1958 l.append(readAttributeValue());
1959 return new ArrayAttributeProxy(l.toList());
1960 }
1961 case '@':
1962 return readCompoundAnnotation();
1963 default:
1964 throw new AssertionError("unknown annotation tag '" + c + "'");
1965 }
1966 }
1967
1968 interface ProxyVisitor extends Attribute.Visitor {
1969 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1970 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1971 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1972 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1973 }
1974
1975 static class EnumAttributeProxy extends Attribute {
1976 Type enumType;
1977 Name enumerator;
1978 public EnumAttributeProxy(Type enumType, Name enumerator) {
1979 super(null);
1980 this.enumType = enumType;
1981 this.enumerator = enumerator;
1982 }
1983 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1984 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1985 public String toString() {
1986 return "/*proxy enum*/" + enumType + "." + enumerator;
1987 }
1988 }
1989
1990 static class ClassAttributeProxy extends Attribute {
1991 Type classType;
1992 public ClassAttributeProxy(Type classType) {
1993 super(null);
1994 this.classType = classType;
1995 }
1996 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1997 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1998 public String toString() {
1999 return "/*proxy class*/" + classType + ".class";
2000 }
2001 }
2002
2003 static class ArrayAttributeProxy extends Attribute {
2004 List<Attribute> values;
2005 ArrayAttributeProxy(List<Attribute> values) {
2006 super(null);
2007 this.values = values;
2008 }
2009 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
2010 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2011 public String toString() {
2012 return "{" + values + "}";
2013 }
2014 }
2015
2016 /** A temporary proxy representing a compound attribute.
2017 */
2018 static class CompoundAnnotationProxy extends Attribute {
2019 final List<Pair<Name,Attribute>> values;
2020 public CompoundAnnotationProxy(Type type,
2021 List<Pair<Name,Attribute>> values) {
2022 super(type);
2023 this.values = values;
2024 }
2025 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
2026 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2027 public String toString() {
2028 StringBuilder buf = new StringBuilder();
2029 buf.append("@");
2030 buf.append(type.tsym.getQualifiedName());
2031 buf.append("/*proxy*/{");
2032 boolean first = true;
2033 for (List<Pair<Name,Attribute>> v = values;
2034 v.nonEmpty(); v = v.tail) {
2035 Pair<Name,Attribute> value = v.head;
2036 if (!first) buf.append(",");
2037 first = false;
2038 buf.append(value.fst);
2039 buf.append("=");
2040 buf.append(value.snd);
2041 }
2042 buf.append("}");
2043 return buf.toString();
2044 }
2045 }
2046
2047 /** A temporary proxy representing a type annotation.
2048 */
2049 static class TypeAnnotationProxy {
2050 final CompoundAnnotationProxy compound;
2051 final TypeAnnotationPosition position;
2052 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2053 TypeAnnotationPosition position) {
2054 this.compound = compound;
2055 this.position = position;
2056 }
2057 }
2058
2059 class AnnotationDeproxy implements ProxyVisitor {
2060 private ClassSymbol requestingOwner;
2061
2062 AnnotationDeproxy(ClassSymbol owner) {
2063 this.requestingOwner = owner;
2064 }
2065
2066 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2067 // also must fill in types!!!!
2068 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2069 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2070 buf.append(deproxyCompound(l.head));
2071 }
2072 return buf.toList();
2073 }
2074
2075 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2076 Type annotationType = resolvePossibleProxyType(a.type);
2077 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2078 for (List<Pair<Name,Attribute>> l = a.values;
2079 l.nonEmpty();
2080 l = l.tail) {
2081 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2082 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2083 }
2084 return new Attribute.Compound(annotationType, buf.toList());
2085 }
2086
2087 MethodSymbol findAccessMethod(Type container, Name name) {
2088 CompletionFailure failure = null;
2089 try {
2090 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2091 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2092 return (MethodSymbol) sym;
2093 }
2094 } catch (CompletionFailure ex) {
2095 failure = ex;
2096 }
2097 // The method wasn't found: emit a warning and recover
2098 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2099 try {
2100 if (failure == null) {
2101 lint.logIfEnabled(LintWarnings.AnnotationMethodNotFound(container, name));
2102 } else {
2103 lint.logIfEnabled(LintWarnings.AnnotationMethodNotFoundReason(container,
2104 name,
2105 failure.getDetailValue()));//diagnostic, if present
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 lint.logIfEnabled(LintWarnings.RuntimeInvisibleParameterAnnotations(currentClassFile));
2982 }
2983 /**
2984 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method.
2985 * Flags are optionally read from the MethodParameters attribute.
2986 * Names are optionally read from the MethodParameters attribute. If the constant pool index
2987 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute.
2988 * @param mpIndex the index of the parameter in the MethodParameters attribute
2989 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute
2990 */
2991 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) {
2992 long flags = PARAMETER;
2993 Name argName;
2994 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length
2995 && parameterAccessFlags[mpIndex] != 0) {
2996 flags |= parameterAccessFlags[mpIndex];
2997 }
2998 if (parameterNameIndicesMp != null && mpIndex < parameterNameIndicesMp.length
2999 // if name_index is 0, then we might still get a name from the LocalVariableTable
3000 && parameterNameIndicesMp[mpIndex] != 0) {
3001 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty);
3002 flags |= NAME_FILLED;
3003 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length
3004 && parameterNameIndicesLvt[lvtIndex] != 0) {
3005 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty);
3006 flags |= NAME_FILLED;
3007 } else {
3008 String prefix = "arg";
3009 while (true) {
3010 argName = names.fromString(prefix + exclude.size());
3011 if (!exclude.contains(argName))
3012 break;
3013 prefix += "$";
3014 }
3015 }
3016 exclude.add(argName);
3017 return new ParamSymbol(flags, argName, t, owner);
3018 }
3019
3020 /**
3021 * skip n bytes
3022 */
3023 void skipBytes(int n) {
3024 bp = bp + n;
3025 }
3026
3027 /** Skip a field or method
3028 */
3029 void skipMember() {
3030 bp = bp + 6;
3031 char ac = nextChar();
3032 for (int i = 0; i < ac; i++) {
3033 bp = bp + 2;
3034 int attrLen = nextInt();
3035 bp = bp + attrLen;
3036 }
3037 }
3038
3039 void skipInnerClasses() {
3040 int n = nextChar();
3041 for (int i = 0; i < n; i++) {
3042 nextChar();
3043 nextChar();
3044 nextChar();
3045 nextChar();
3046 }
3047 }
3048
3049 /** Enter type variables of this classtype and all enclosing ones in
3050 * `typevars'.
3051 */
3052 protected void enterTypevars(Symbol sym, Type t) {
3053 if (t.getEnclosingType() != null) {
3054 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
3055 enterTypevars(sym.owner, t.getEnclosingType());
3056 }
3057 } else if (sym.kind == MTH && !sym.isStatic()) {
3058 enterTypevars(sym.owner, sym.owner.type);
3059 }
3060 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
3061 typevars.enter(xs.head.tsym);
3062 }
3063 }
3064
3065 protected ClassSymbol enterClass(Name name) {
3066 return syms.enterClass(currentModule, name);
3067 }
3068
3069 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
3070 return syms.enterClass(currentModule, name, owner);
3071 }
3072
3073 /** Read contents of a given class symbol `c'. Both external and internal
3074 * versions of an inner class are read.
3075 */
3076 void readClass(ClassSymbol c) {
3077 ClassType ct = (ClassType)c.type;
3078
3079 // allocate scope for members
3080 c.members_field = WriteableScope.create(c);
3081
3082 // prepare type variable table
3083 typevars = typevars.dup(currentOwner);
3084 if (ct.getEnclosingType().hasTag(CLASS))
3085 enterTypevars(c.owner, ct.getEnclosingType());
3086
3087 // read flags, or skip if this is an inner class
3088 long f = nextChar();
3089 long flags = adjustClassFlags(c, f);
3090 if ((flags & MODULE) == 0) {
3091 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags;
3092 // read own class name and check that it matches
3093 currentModule = c.packge().modle;
3094 ClassSymbol self = poolReader.getClass(nextChar());
3095 if (c != self) {
3096 throw badClassFile("class.file.wrong.class",
3097 self.flatname);
3098 }
3099 } else {
3100 if (majorVersion < Version.V53.major) {
3101 throw badClassFile("anachronistic.module.info",
3102 Integer.toString(majorVersion),
3103 Integer.toString(minorVersion));
3104 }
3105 c.flags_field = flags;
3106 if (c.owner.kind != MDL) {
3107 throw badClassFile("module.info.definition.expected");
3108 }
3109 currentModule = (ModuleSymbol) c.owner;
3110 int this_class = nextChar();
3111 // temp, no check on this_class
3112 }
3113
3114 // class attributes must be read before class
3115 // skip ahead to read class attributes
3116 int startbp = bp;
3117 nextChar();
3118 char interfaceCount = nextChar();
3119 bp += interfaceCount * 2;
3120 char fieldCount = nextChar();
3121 for (int i = 0; i < fieldCount; i++) skipMember();
3122 char methodCount = nextChar();
3123 for (int i = 0; i < methodCount; i++) skipMember();
3124 readClassAttrs(c);
3125
3126 if (!c.getPermittedSubclasses().isEmpty()) {
3127 c.flags_field |= SEALED;
3128 }
3129
3130 // reset and read rest of classinfo
3131 bp = startbp;
3132 int n = nextChar();
3133 if ((flags & MODULE) != 0 && n > 0) {
3134 throw badClassFile("module.info.invalid.super.class");
3135 }
3136 if (ct.supertype_field == null)
3137 ct.supertype_field =
3138 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType);
3139 n = nextChar();
3140 List<Type> is = List.nil();
3141 for (int i = 0; i < n; i++) {
3142 Type _inter = poolReader.getClass(nextChar()).erasure(types);
3143 is = is.prepend(_inter);
3144 }
3145 if (ct.interfaces_field == null)
3146 ct.interfaces_field = is.reverse();
3147
3148 Assert.check(fieldCount == nextChar());
3149 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
3150 Assert.check(methodCount == nextChar());
3151 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
3152 if (c.isRecord()) {
3153 for (RecordComponent rc: c.getRecordComponents()) {
3154 rc.accessor = lookupMethod(c, rc.name, List.nil());
3155 }
3156 }
3157 typevars = typevars.leave();
3158 }
3159
3160 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) {
3161 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) {
3162 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) {
3163 return (MethodSymbol) s;
3164 }
3165 }
3166 return null;
3167 }
3168
3169 /** Read inner class info. For each inner/outer pair allocate a
3170 * member class.
3171 */
3172 void readInnerClasses(ClassSymbol c) {
3173 int n = nextChar();
3174 for (int i = 0; i < n; i++) {
3175 nextChar(); // skip inner class symbol
3176 int outerIdx = nextChar();
3177 int nameIdx = nextChar();
3178 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null);
3179 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty);
3180 if (name == null) name = names.empty;
3181 long flags = adjustClassFlags(c, nextChar());
3182 if (outer != null) { // we have a member class
3183 if (name == names.empty)
3184 name = names.one;
3185 ClassSymbol member = enterClass(name, outer);
3186 if ((flags & STATIC) == 0) {
3187 ((ClassType)member.type).setEnclosingType(outer.type);
3188 if (member.erasure_field != null)
3189 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
3190 }
3191 if (c == outer && member.owner == c) {
3192 member.flags_field = flags;
3193 enterMember(c, member);
3194 }
3195 }
3196 }
3197 }
3198
3199 /** Read a class definition from the bytes in buf.
3200 */
3201 private void readClassBuffer(ClassSymbol c) throws IOException {
3202 int magic = nextInt();
3203 if (magic != JAVA_MAGIC)
3204 throw badClassFile("illegal.start.of.class.file");
3205
3206 minorVersion = nextChar();
3207 majorVersion = nextChar();
3208 int maxMajor = Version.MAX().major;
3209 int maxMinor = Version.MAX().minor;
3210 previewClassFile =
3211 minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3212 if (majorVersion > maxMajor ||
3213 majorVersion * 1000 + minorVersion <
3214 Version.MIN().major * 1000 + Version.MIN().minor) {
3215 if (majorVersion == (maxMajor + 1) && !previewClassFile)
3216 log.warning(Warnings.BigMajorVersion(currentClassFile,
3217 majorVersion,
3218 maxMajor));
3219 else
3220 throw badClassFile("wrong.version",
3221 Integer.toString(majorVersion),
3222 Integer.toString(minorVersion),
3223 Integer.toString(maxMajor),
3224 Integer.toString(maxMinor));
3225 }
3226 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT;
3227
3228 if (previewClassFile) {
3229 if (!preview.isEnabled()) {
3230 log.error(preview.disabledError(currentClassFile, majorVersion));
3231 } else {
3232 preview.warnPreview(c.classfile, majorVersion);
3233 }
3234 }
3235
3236 poolReader = new PoolReader(this, names, syms);
3237 bp = poolReader.readPool(buf, bp);
3238 if (signatureBuffer.length < bp) {
3239 int ns = Integer.highestOneBit(bp) << 1;
3240 signatureBuffer = new byte[ns];
3241 }
3242 readClass(c);
3243 }
3244
3245 public void readClassFile(ClassSymbol c) {
3246 currentOwner = c;
3247 currentClassFile = c.classfile;
3248 warnedAttrs.clear();
3249 filling = true;
3250 target = null;
3251 repeatable = null;
3252 try {
3253 bp = 0;
3254 buf.reset();
3255 try (InputStream input = c.classfile.openInputStream()) {
3256 buf.appendStream(input);
3257 }
3258 readClassBuffer(c);
3259 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
3260 List<Type> missing = missingTypeVariables;
3261 List<Type> found = foundTypeVariables;
3262 missingTypeVariables = List.nil();
3263 foundTypeVariables = List.nil();
3264 interimUses = List.nil();
3265 interimProvides = List.nil();
3266 filling = false;
3267 ClassType ct = (ClassType)currentOwner.type;
3268 ct.supertype_field =
3269 types.subst(ct.supertype_field, missing, found);
3270 ct.interfaces_field =
3271 types.subst(ct.interfaces_field, missing, found);
3272 ct.typarams_field =
3273 types.substBounds(ct.typarams_field, missing, found);
3274 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
3275 types.head.tsym.type = types.head;
3276 }
3277 } else if (missingTypeVariables.isEmpty() !=
3278 foundTypeVariables.isEmpty()) {
3279 Name name = missingTypeVariables.head.tsym.name;
3280 throw badClassFile("undecl.type.var", name);
3281 }
3282
3283 if ((c.flags_field & Flags.ANNOTATION) != 0) {
3284 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
3285 } else {
3286 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
3287 }
3288
3289 if (c == currentModule.module_info) {
3290 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
3291 Assert.check(currentModule.isCompleted());
3292 currentModule.usesProvidesCompleter =
3293 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
3294 } else {
3295 currentModule.uses = List.nil();
3296 currentModule.provides = List.nil();
3297 }
3298 }
3299 } catch (IOException | ClosedFileSystemException ex) {
3300 throw badClassFile("unable.to.access.file", ex.toString());
3301 } catch (ArrayIndexOutOfBoundsException ex) {
3302 throw badClassFile("bad.class.file", c.flatname);
3303 } finally {
3304 interimUses = List.nil();
3305 interimProvides = List.nil();
3306 missingTypeVariables = List.nil();
3307 foundTypeVariables = List.nil();
3308 filling = false;
3309 }
3310 }
3311
3312 /** We can only read a single class file at a time; this
3313 * flag keeps track of when we are currently reading a class
3314 * file.
3315 */
3316 public boolean filling = false;
3317
3318 /* **********************************************************************
3319 * Adjusting flags
3320 ***********************************************************************/
3321
3322 long adjustFieldFlags(long flags) {
3323 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3324 if (allowValueClasses && previewClassFile && (flags & ACC_STRICT) != 0) {
3325 flags &= ~ACC_STRICT;
3326 flags |= STRICT;
3327 }
3328 return flags;
3329 }
3330
3331 long adjustMethodFlags(long flags) {
3332 if ((flags & ACC_BRIDGE) != 0) {
3333 flags &= ~ACC_BRIDGE;
3334 flags |= BRIDGE;
3335 }
3336 if ((flags & ACC_VARARGS) != 0) {
3337 flags &= ~ACC_VARARGS;
3338 flags |= VARARGS;
3339 }
3340 return flags;
3341 }
3342
3343 long adjustClassFlags(ClassSymbol c, long flags) {
3344 if ((flags & ACC_MODULE) != 0) {
3345 flags &= ~ACC_MODULE;
3346 flags |= MODULE;
3347 }
3348 if (((flags & ACC_IDENTITY) != 0 && !isMigratedValueClass(flags)) || (majorVersion < V67.major && (flags & INTERFACE) == 0)) {
3349 flags |= IDENTITY_TYPE;
3350 } else if (needsValueFlag(c, flags)) {
3351 flags |= VALUE_CLASS;
3352 flags &= ~IDENTITY_TYPE;
3353 }
3354 flags &= ~ACC_IDENTITY; // ACC_IDENTITY and SYNCHRONIZED bits overloaded
3355 return flags;
3356 }
3357
3358 private boolean needsValueFlag(Symbol c, long flags) {
3359 boolean previewClassFile = minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
3360 if (allowValueClasses) {
3361 if (previewClassFile && majorVersion >= V67.major && (flags & INTERFACE) == 0 ||
3362 majorVersion >= V67.major && isMigratedValueClass(flags)) {
3363 return true;
3364 }
3365 }
3366 return false;
3367 }
3368
3369 private boolean isMigratedValueClass(long flags) {
3370 return allowValueClasses && ((flags & MIGRATED_VALUE_CLASS) != 0);
3371 }
3372
3373 /**
3374 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
3375 * The attribute is only the last component of the original filename, so is unlikely
3376 * to be valid as is, so operations other than those to access the name throw
3377 * UnsupportedOperationException
3378 */
3379 private static class SourceFileObject implements JavaFileObject {
3380
3381 /** The file's name.
3382 */
3383 private final Name name;
3384
3385 public SourceFileObject(Name name) {
3386 this.name = name;
3387 }
3388
3389 @Override @DefinedBy(Api.COMPILER)
3390 public URI toUri() {
3391 try {
3392 return new URI(null, name.toString(), null);
3393 } catch (URISyntaxException e) {
3394 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
3395 }
3396 }
3397
3398 @Override @DefinedBy(Api.COMPILER)
3399 public String getName() {
3400 return name.toString();
3401 }
3402
3403 @Override @DefinedBy(Api.COMPILER)
3404 public JavaFileObject.Kind getKind() {
3405 return BaseFileManager.getKind(getName());
3406 }
3407
3408 @Override @DefinedBy(Api.COMPILER)
3409 public InputStream openInputStream() {
3410 throw new UnsupportedOperationException();
3411 }
3412
3413 @Override @DefinedBy(Api.COMPILER)
3414 public OutputStream openOutputStream() {
3415 throw new UnsupportedOperationException();
3416 }
3417
3418 @Override @DefinedBy(Api.COMPILER)
3419 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
3420 throw new UnsupportedOperationException();
3421 }
3422
3423 @Override @DefinedBy(Api.COMPILER)
3424 public Reader openReader(boolean ignoreEncodingErrors) {
3425 throw new UnsupportedOperationException();
3426 }
3427
3428 @Override @DefinedBy(Api.COMPILER)
3429 public Writer openWriter() {
3430 throw new UnsupportedOperationException();
3431 }
3432
3433 @Override @DefinedBy(Api.COMPILER)
3434 public long getLastModified() {
3435 throw new UnsupportedOperationException();
3436 }
3437
3438 @Override @DefinedBy(Api.COMPILER)
3439 public boolean delete() {
3440 throw new UnsupportedOperationException();
3441 }
3442
3443 @Override @DefinedBy(Api.COMPILER)
3444 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
3445 return true; // fail-safe mode
3446 }
3447
3448 @Override @DefinedBy(Api.COMPILER)
3449 public NestingKind getNestingKind() {
3450 return null;
3451 }
3452
3453 @Override @DefinedBy(Api.COMPILER)
3454 public Modifier getAccessLevel() {
3455 return null;
3456 }
3457
3458 /**
3459 * Check if two file objects are equal.
3460 * SourceFileObjects are just placeholder objects for the value of a
3461 * SourceFile attribute, and do not directly represent specific files.
3462 * Two SourceFileObjects are equal if their names are equal.
3463 */
3464 @Override
3465 public boolean equals(Object other) {
3466 if (this == other)
3467 return true;
3468 return (other instanceof SourceFileObject sourceFileObject)
3469 && name.equals(sourceFileObject.name);
3470 }
3471
3472 @Override
3473 public int hashCode() {
3474 return name.hashCode();
3475 }
3476 }
3477
3478 private class CompleterDeproxy implements AnnotationTypeCompleter {
3479 ClassSymbol proxyOn;
3480 CompoundAnnotationProxy target;
3481 CompoundAnnotationProxy repeatable;
3482
3483 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
3484 CompoundAnnotationProxy repeatable)
3485 {
3486 this.proxyOn = c;
3487 this.target = target;
3488 this.repeatable = repeatable;
3489 }
3490
3491 @Override
3492 public void complete(ClassSymbol sym) {
3493 Assert.check(proxyOn == sym);
3494 Attribute.Compound theTarget = null, theRepeatable = null;
3495 AnnotationDeproxy deproxy;
3496
3497 try {
3498 if (target != null) {
3499 deproxy = new AnnotationDeproxy(proxyOn);
3500 theTarget = deproxy.deproxyCompound(target);
3501 }
3502
3503 if (repeatable != null) {
3504 deproxy = new AnnotationDeproxy(proxyOn);
3505 theRepeatable = deproxy.deproxyCompound(repeatable);
3506 }
3507 } catch (Exception e) {
3508 throw new CompletionFailure(sym,
3509 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())),
3510 dcfh);
3511 }
3512
3513 sym.getAnnotationTypeMetadata().setTarget(theTarget);
3514 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
3515 }
3516 }
3517
3518 private class ProxyType extends Type {
3519
3520 private final Name name;
3521
3522 public ProxyType(int index) {
3523 super(syms.noSymbol, List.nil());
3524 this.name = poolReader.getName(index);
3525 }
3526
3527 @Override
3528 public TypeTag getTag() {
3529 return TypeTag.NONE;
3530 }
3531
3532 public Type resolve() {
3533 return name.map(ClassReader.this::sigToType);
3534 }
3535
3536 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3537 public String toString() {
3538 return "<ProxyType>";
3539 }
3540
3541 }
3542
3543 private static final class InterimUsesDirective {
3544 public final Name service;
3545
3546 public InterimUsesDirective(Name service) {
3547 this.service = service;
3548 }
3549
3550 }
3551
3552 private static final class InterimProvidesDirective {
3553 public final Name service;
3554 public final List<Name> impls;
3555
3556 public InterimProvidesDirective(Name service, List<Name> impls) {
3557 this.service = service;
3558 this.impls = impls;
3559 }
3560
3561 }
3562
3563 private final class UsesProvidesCompleter implements Completer {
3564 private final ModuleSymbol currentModule;
3565 private final List<InterimUsesDirective> interimUsesCopy;
3566 private final List<InterimProvidesDirective> interimProvidesCopy;
3567
3568 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3569 this.currentModule = currentModule;
3570 this.interimUsesCopy = interimUsesCopy;
3571 this.interimProvidesCopy = interimProvidesCopy;
3572 }
3573
3574 @Override
3575 public void complete(Symbol sym) throws CompletionFailure {
3576 ListBuffer<Directive> directives = new ListBuffer<>();
3577 directives.addAll(currentModule.directives);
3578 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3579 for (InterimUsesDirective interim : interimUsesCopy) {
3580 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3581 uses.add(d);
3582 directives.add(d);
3583 }
3584 currentModule.uses = uses.toList();
3585 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3586 for (InterimProvidesDirective interim : interimProvidesCopy) {
3587 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3588 for (Name impl : interim.impls) {
3589 impls.append(syms.enterClass(currentModule, impl));
3590 }
3591 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3592 impls.toList());
3593 provides.add(d);
3594 directives.add(d);
3595 }
3596 currentModule.provides = provides.toList();
3597 currentModule.directives = directives.toList();
3598 }
3599 }
3600 }