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