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