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