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.TRANSITIVE) &&
1206 (majorVersion != Version.MAX().major || !previewClassFile) &&
1207 !preview.participatesInPreview(syms, msym)) {
1208 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE);
1209 }
1210 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1211 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1212 }
1213 }
1214 nextChar(); // skip compiled version
1215 requires.add(new RequiresDirective(rsym, flags));
1216 }
1217 msym.requires = requires.toList();
1218 directives.addAll(msym.requires);
1219
1220 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1221 int nexports = nextChar();
1222 for (int i = 0; i < nexports; i++) {
1223 PackageSymbol p = poolReader.getPackage(nextChar());
1224 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1225 int nto = nextChar();
1226 List<ModuleSymbol> to;
1227 if (nto == 0) {
1228 to = null;
1229 } else {
1230 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1231 for (int t = 0; t < nto; t++)
1232 lb.append(poolReader.getModule(nextChar()));
1233 to = lb.toList();
1234 }
1235 exports.add(new ExportsDirective(p, to, flags));
1236 }
1237 msym.exports = exports.toList();
1238 directives.addAll(msym.exports);
1239 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1240 int nopens = nextChar();
1241 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1242 throw badClassFile("module.non.zero.opens", currentModule.name);
1243 }
1244 for (int i = 0; i < nopens; i++) {
1245 PackageSymbol p = poolReader.getPackage(nextChar());
1246 Set<OpensFlag> flags = readOpensFlags(nextChar());
1247 int nto = nextChar();
1248 List<ModuleSymbol> to;
1249 if (nto == 0) {
1250 to = null;
1251 } else {
1252 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1253 for (int t = 0; t < nto; t++)
1254 lb.append(poolReader.getModule(nextChar()));
1255 to = lb.toList();
1256 }
1257 opens.add(new OpensDirective(p, to, flags));
1258 }
1259 msym.opens = opens.toList();
1260 directives.addAll(msym.opens);
1261
1262 msym.directives = directives.toList();
1263
1264 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1265 int nuses = nextChar();
1266 for (int i = 0; i < nuses; i++) {
1267 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1268 uses.add(new InterimUsesDirective(srvc));
1269 }
1270 interimUses = uses.toList();
1271
1272 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1273 int nprovides = nextChar();
1274 for (int p = 0; p < nprovides; p++) {
1275 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1276 int nimpls = nextChar();
1277 ListBuffer<Name> impls = new ListBuffer<>();
1278 for (int i = 0; i < nimpls; i++) {
1279 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper));
1280 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1281 }
1282 }
1283 interimProvides = provides.toList();
1284 }
1285 }
1286
1287 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException {
1288 byte[] buf = ClassFile.internalize(arr, offset, length);
1289 try {
1290 return names.fromUtf(buf, 0, buf.length, utf8validation);
1291 } catch (InvalidUtfException e) {
1292 if (warnOnIllegalUtf8) {
1293 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
1294 Fragments.BadUtf8ByteSequenceAt(e.getOffset())));
1295 return names.fromUtfLax(buf, 0, buf.length);
1296 }
1297 throw e;
1298 }
1299 }
1300 },
1301
1302 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1303 @Override
1304 protected boolean accepts(AttributeKind kind) {
1305 return super.accepts(kind) && allowModules;
1306 }
1307 protected void read(Symbol sym, int attrLen) {
1308 if (sym.kind == TYP && sym.owner.kind == MDL) {
1309 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1310 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1311 }
1312 }
1313 },
1314
1315 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) {
1316 @Override
1317 protected boolean accepts(AttributeKind kind) {
1318 return super.accepts(kind) && allowRecords;
1319 }
1320 protected void read(Symbol sym, int attrLen) {
1321 if (sym.kind == TYP) {
1322 sym.flags_field |= RECORD;
1323 }
1324 int componentCount = nextChar();
1325 ListBuffer<RecordComponent> components = new ListBuffer<>();
1326 for (int i = 0; i < componentCount; i++) {
1327 Name name = poolReader.getName(nextChar());
1328 Type type = poolReader.getType(nextChar());
1329 RecordComponent c = new RecordComponent(name, type, sym);
1330 readAttrs(c, AttributeKind.MEMBER);
1331 components.add(c);
1332 }
1333 ((ClassSymbol) sym).setRecordComponents(components.toList());
1334 }
1335 },
1336 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) {
1337 @Override
1338 protected boolean accepts(AttributeKind kind) {
1339 return super.accepts(kind) && allowSealedTypes;
1340 }
1341 protected void read(Symbol sym, int attrLen) {
1342 if (sym.kind == TYP) {
1343 ListBuffer<Symbol> subtypes = new ListBuffer<>();
1344 int numberOfPermittedSubtypes = nextChar();
1345 for (int i = 0; i < numberOfPermittedSubtypes; i++) {
1346 subtypes.add(poolReader.getClass(nextChar()));
1347 }
1348 ((ClassSymbol)sym).setPermittedSubclasses(subtypes.toList());
1349 }
1350 }
1351 },
1352 };
1353
1354 for (AttributeReader r: readers)
1355 attributeReaders.put(r.name, r);
1356 }
1357
1358 protected void readEnclosingMethodAttr(Symbol sym) {
1359 // sym is a nested class with an "Enclosing Method" attribute
1360 // remove sym from it's current owners scope and place it in
1361 // the scope specified by the attribute
1362 sym.owner.members().remove(sym);
1363 ClassSymbol self = (ClassSymbol)sym;
1364 ClassSymbol c = poolReader.getClass(nextChar());
1365 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null);
1366
1367 if (c.members_field == null || c.kind != TYP)
1368 throw badClassFile("bad.enclosing.class", self, c);
1369
1370 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1371 if (nt != null && m == null)
1372 throw badEnclosingMethod(self);
1373
1374 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1375 self.owner = m != null ? m : c;
1376 if (self.name.isEmpty())
1377 self.fullname = names.empty;
1378 else
1379 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1380
1381 if (m != null) {
1382 ((ClassType)sym.type).setEnclosingType(m.type);
1383 } else if ((self.flags_field & STATIC) == 0) {
1384 ((ClassType)sym.type).setEnclosingType(c.type);
1385 } else {
1386 ((ClassType)sym.type).setEnclosingType(Type.noType);
1387 }
1388 enterTypevars(self, self.type);
1389 if (!missingTypeVariables.isEmpty()) {
1390 ListBuffer<Type> typeVars = new ListBuffer<>();
1391 for (Type typevar : missingTypeVariables) {
1392 typeVars.append(findTypeVar(typevar.tsym.name));
1393 }
1394 foundTypeVariables = typeVars.toList();
1395 } else {
1396 foundTypeVariables = List.nil();
1397 }
1398 }
1399
1400 // See java.lang.Class
1401 private Name simpleBinaryName(Name self, Name enclosing) {
1402 if (!self.startsWith(enclosing)) {
1403 throw badClassFile("bad.enclosing.method", self);
1404 }
1405
1406 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1407 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1408 throw badClassFile("bad.enclosing.method", self);
1409 int index = 1;
1410 while (index < simpleBinaryName.length() &&
1411 isAsciiDigit(simpleBinaryName.charAt(index)))
1412 index++;
1413 return names.fromString(simpleBinaryName.substring(index));
1414 }
1415
1416 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1417 if (nt == null)
1418 return null;
1419
1420 MethodType type = nt.type.asMethodType();
1421
1422 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1423 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1424 return (MethodSymbol)sym;
1425 }
1426
1427 if (nt.name != names.init)
1428 // not a constructor
1429 return null;
1430 if ((flags & INTERFACE) != 0)
1431 // no enclosing instance
1432 return null;
1433 if (nt.type.getParameterTypes().isEmpty())
1434 // no parameters
1435 return null;
1436
1437 // A constructor of an inner class.
1438 // Remove the first argument (the enclosing instance)
1439 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail,
1440 nt.type.getReturnType(),
1441 nt.type.getThrownTypes(),
1442 syms.methodClass));
1443 // Try searching again
1444 return findMethod(nt, scope, flags);
1445 }
1446
1447 /** Similar to Types.isSameType but avoids completion */
1448 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1449 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1450 .prepend(types.erasure(mt1.getReturnType()));
1451 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1452 while (!types1.isEmpty() && !types2.isEmpty()) {
1453 if (types1.head.tsym != types2.head.tsym)
1454 return false;
1455 types1 = types1.tail;
1456 types2 = types2.tail;
1457 }
1458 return types1.isEmpty() && types2.isEmpty();
1459 }
1460
1461 /**
1462 * Character.isDigit answers <tt>true</tt> to some non-ascii
1463 * digits. This one does not. <b>copied from java.lang.Class</b>
1464 */
1465 private static boolean isAsciiDigit(char c) {
1466 return '0' <= c && c <= '9';
1467 }
1468
1469 /** Read member attributes.
1470 */
1471 void readMemberAttrs(Symbol sym) {
1472 readAttrs(sym, AttributeKind.MEMBER);
1473 }
1474
1475 void readAttrs(Symbol sym, AttributeKind kind) {
1476 char ac = nextChar();
1477 for (int i = 0; i < ac; i++) {
1478 Name attrName = poolReader.getName(nextChar());
1479 int attrLen = nextInt();
1480 AttributeReader r = attributeReaders.get(attrName);
1481 if (r != null && r.accepts(kind))
1482 r.read(sym, attrLen);
1483 else {
1484 bp = bp + attrLen;
1485 }
1486 }
1487 }
1488
1489 private boolean readingClassAttr = false;
1490 private List<Type> missingTypeVariables = List.nil();
1491 private List<Type> foundTypeVariables = List.nil();
1492
1493 /** Read class attributes.
1494 */
1495 void readClassAttrs(ClassSymbol c) {
1496 readAttrs(c, AttributeKind.CLASS);
1497 }
1498
1499 /** Read code block.
1500 */
1501 Code readCode(Symbol owner) {
1502 nextChar(); // max_stack
1503 nextChar(); // max_locals
1504 final int code_length = nextInt();
1505 bp += code_length;
1506 final char exception_table_length = nextChar();
1507 bp += exception_table_length * 8;
1508 readMemberAttrs(owner);
1509 return null;
1510 }
1511
1512 /* **********************************************************************
1513 * Reading Java-language annotations
1514 ***********************************************************************/
1515
1516 /**
1517 * Save annotations.
1518 */
1519 List<CompoundAnnotationProxy> readAnnotations() {
1520 int numAttributes = nextChar();
1521 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1522 for (int i = 0; i < numAttributes; i++) {
1523 annotations.append(readCompoundAnnotation());
1524 }
1525 return annotations.toList();
1526 }
1527
1528 /** Attach annotations.
1529 */
1530 void attachAnnotations(final Symbol sym) {
1531 attachAnnotations(sym, readAnnotations());
1532 }
1533
1534 /**
1535 * Attach annotations.
1536 */
1537 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1538 if (annotations.isEmpty()) {
1539 return;
1540 }
1541 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1542 for (CompoundAnnotationProxy proxy : annotations) {
1543 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName())
1544 sym.flags_field |= PROPRIETARY;
1545 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) {
1546 if (profile != Profile.DEFAULT) {
1547 for (Pair<Name, Attribute> v : proxy.values) {
1548 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) {
1549 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) {
1550 sym.flags_field |= NOT_IN_PROFILE;
1551 }
1552 }
1553 }
1554 }
1555 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) {
1556 sym.flags_field |= PREVIEW_API;
1557 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1558 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) {
1559 Assert.check(sym.kind == TYP);
1560 sym.flags_field |= VALUE_BASED;
1561 } else if (proxy.type.tsym.flatName() == syms.restrictedInternalType.tsym.flatName()) {
1562 Assert.check(sym.kind == MTH);
1563 sym.flags_field |= RESTRICTED;
1564 } else {
1565 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1566 target = proxy;
1567 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1568 repeatable = proxy;
1569 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1570 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1571 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL);
1572 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) {
1573 sym.flags_field |= PREVIEW_API;
1574 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1575 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) {
1576 sym.flags_field |= VALUE_BASED;
1577 } else if (proxy.type.tsym == syms.restrictedType.tsym) {
1578 Assert.check(sym.kind == MTH);
1579 sym.flags_field |= RESTRICTED;
1580 }
1581 proxies.append(proxy);
1582 }
1583 }
1584 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1585 }
1586 //where:
1587 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) {
1588 for (Pair<Name, Attribute> v : proxy.values) {
1589 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) {
1590 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
1591 sym.flags_field |= flag;
1592 }
1593 }
1594 }
1595 }
1596
1597 /** Read parameter annotations.
1598 */
1599 void readParameterAnnotations(Symbol meth) {
1600 int numParameters;
1601 try {
1602 numParameters = buf.getByte(bp++) & 0xFF;
1603 } catch (UnderflowException e) {
1604 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1605 }
1606 if (parameterAnnotations == null) {
1607 parameterAnnotations = new ParameterAnnotations[numParameters];
1608 } else if (parameterAnnotations.length != numParameters) {
1609 //the RuntimeVisibleParameterAnnotations and RuntimeInvisibleParameterAnnotations
1610 //provide annotations for a different number of parameters, ignore:
1611 lint.logIfEnabled(LintWarnings.RuntimeVisibleInvisibleParamAnnotationsMismatch(currentClassFile));
1612 for (int pnum = 0; pnum < numParameters; pnum++) {
1613 readAnnotations();
1614 }
1615 parameterAnnotations = null;
1616 return ;
1617 }
1618 for (int pnum = 0; pnum < numParameters; pnum++) {
1619 if (parameterAnnotations[pnum] == null) {
1620 parameterAnnotations[pnum] = new ParameterAnnotations();
1621 }
1622 parameterAnnotations[pnum].add(readAnnotations());
1623 }
1624 }
1625
1626 void attachTypeAnnotations(final Symbol sym) {
1627 int numAttributes = nextChar();
1628 if (numAttributes != 0) {
1629 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1630 for (int i = 0; i < numAttributes; i++)
1631 proxies.append(readTypeAnnotation());
1632 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1633 }
1634 }
1635
1636 /** Attach the default value for an annotation element.
1637 */
1638 void attachAnnotationDefault(final Symbol sym) {
1639 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1640 final Attribute value = readAttributeValue();
1641
1642 // The default value is set later during annotation. It might
1643 // be the case that the Symbol sym is annotated _after_ the
1644 // repeating instances that depend on this default value,
1645 // because of this we set an interim value that tells us this
1646 // element (most likely) has a default.
1647 //
1648 // Set interim value for now, reset just before we do this
1649 // properly at annotate time.
1650 meth.defaultValue = value;
1651 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1652 }
1653
1654 Type readTypeOrClassSymbol(int i) {
1655 return readTypeToProxy(i);
1656 }
1657 Type readTypeToProxy(int i) {
1658 if (currentModule.module_info == currentOwner) {
1659 return new ProxyType(i);
1660 } else {
1661 return poolReader.getType(i);
1662 }
1663 }
1664
1665 CompoundAnnotationProxy readCompoundAnnotation() {
1666 Type t;
1667 if (currentModule.module_info == currentOwner) {
1668 int cpIndex = nextChar();
1669 t = new ProxyType(cpIndex);
1670 } else {
1671 t = readTypeOrClassSymbol(nextChar());
1672 }
1673 int numFields = nextChar();
1674 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1675 for (int i=0; i<numFields; i++) {
1676 Name name = poolReader.getName(nextChar());
1677 Attribute value = readAttributeValue();
1678 pairs.append(new Pair<>(name, value));
1679 }
1680 return new CompoundAnnotationProxy(t, pairs.toList());
1681 }
1682
1683 TypeAnnotationProxy readTypeAnnotation() {
1684 TypeAnnotationPosition position = readPosition();
1685 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1686
1687 return new TypeAnnotationProxy(proxy, position);
1688 }
1689
1690 TypeAnnotationPosition readPosition() {
1691 int tag = nextByte(); // TargetType tag is a byte
1692
1693 if (!TargetType.isValidTargetTypeValue(tag))
1694 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1695
1696 TargetType type = TargetType.fromTargetTypeValue(tag);
1697
1698 switch (type) {
1699 // instanceof
1700 case INSTANCEOF: {
1701 final int offset = nextChar();
1702 final TypeAnnotationPosition position =
1703 TypeAnnotationPosition.instanceOf(readTypePath());
1704 position.offset = offset;
1705 return position;
1706 }
1707 // new expression
1708 case NEW: {
1709 final int offset = nextChar();
1710 final TypeAnnotationPosition position =
1711 TypeAnnotationPosition.newObj(readTypePath());
1712 position.offset = offset;
1713 return position;
1714 }
1715 // constructor/method reference receiver
1716 case CONSTRUCTOR_REFERENCE: {
1717 final int offset = nextChar();
1718 final TypeAnnotationPosition position =
1719 TypeAnnotationPosition.constructorRef(readTypePath());
1720 position.offset = offset;
1721 return position;
1722 }
1723 case METHOD_REFERENCE: {
1724 final int offset = nextChar();
1725 final TypeAnnotationPosition position =
1726 TypeAnnotationPosition.methodRef(readTypePath());
1727 position.offset = offset;
1728 return position;
1729 }
1730 // local variable
1731 case LOCAL_VARIABLE: {
1732 final int table_length = nextChar();
1733 final int[] newLvarOffset = new int[table_length];
1734 final int[] newLvarLength = new int[table_length];
1735 final int[] newLvarIndex = new int[table_length];
1736
1737 for (int i = 0; i < table_length; ++i) {
1738 newLvarOffset[i] = nextChar();
1739 newLvarLength[i] = nextChar();
1740 newLvarIndex[i] = nextChar();
1741 }
1742
1743 final TypeAnnotationPosition position =
1744 TypeAnnotationPosition.localVariable(readTypePath());
1745 position.lvarOffset = newLvarOffset;
1746 position.lvarLength = newLvarLength;
1747 position.lvarIndex = newLvarIndex;
1748 return position;
1749 }
1750 // resource variable
1751 case RESOURCE_VARIABLE: {
1752 final int table_length = nextChar();
1753 final int[] newLvarOffset = new int[table_length];
1754 final int[] newLvarLength = new int[table_length];
1755 final int[] newLvarIndex = new int[table_length];
1756
1757 for (int i = 0; i < table_length; ++i) {
1758 newLvarOffset[i] = nextChar();
1759 newLvarLength[i] = nextChar();
1760 newLvarIndex[i] = nextChar();
1761 }
1762
1763 final TypeAnnotationPosition position =
1764 TypeAnnotationPosition.resourceVariable(readTypePath());
1765 position.lvarOffset = newLvarOffset;
1766 position.lvarLength = newLvarLength;
1767 position.lvarIndex = newLvarIndex;
1768 return position;
1769 }
1770 // exception parameter
1771 case EXCEPTION_PARAMETER: {
1772 final int exception_index = nextChar();
1773 final TypeAnnotationPosition position =
1774 TypeAnnotationPosition.exceptionParameter(readTypePath());
1775 position.setExceptionIndex(exception_index);
1776 return position;
1777 }
1778 // method receiver
1779 case METHOD_RECEIVER:
1780 return TypeAnnotationPosition.methodReceiver(readTypePath());
1781 // type parameter
1782 case CLASS_TYPE_PARAMETER: {
1783 final int parameter_index = nextByte();
1784 return TypeAnnotationPosition
1785 .typeParameter(readTypePath(), parameter_index);
1786 }
1787 case METHOD_TYPE_PARAMETER: {
1788 final int parameter_index = nextByte();
1789 return TypeAnnotationPosition
1790 .methodTypeParameter(readTypePath(), parameter_index);
1791 }
1792 // type parameter bound
1793 case CLASS_TYPE_PARAMETER_BOUND: {
1794 final int parameter_index = nextByte();
1795 final int bound_index = nextByte();
1796 return TypeAnnotationPosition
1797 .typeParameterBound(readTypePath(), parameter_index,
1798 bound_index);
1799 }
1800 case METHOD_TYPE_PARAMETER_BOUND: {
1801 final int parameter_index = nextByte();
1802 final int bound_index = nextByte();
1803 return TypeAnnotationPosition
1804 .methodTypeParameterBound(readTypePath(), parameter_index,
1805 bound_index);
1806 }
1807 // class extends or implements clause
1808 case CLASS_EXTENDS: {
1809 final int type_index = nextChar();
1810 return TypeAnnotationPosition.classExtends(readTypePath(),
1811 type_index);
1812 }
1813 // throws
1814 case THROWS: {
1815 final int type_index = nextChar();
1816 return TypeAnnotationPosition.methodThrows(readTypePath(),
1817 type_index);
1818 }
1819 // method parameter
1820 case METHOD_FORMAL_PARAMETER: {
1821 final int parameter_index = nextByte();
1822 return TypeAnnotationPosition.methodParameter(readTypePath(),
1823 parameter_index);
1824 }
1825 // type cast
1826 case CAST: {
1827 final int offset = nextChar();
1828 final int type_index = nextByte();
1829 final TypeAnnotationPosition position =
1830 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1831 position.offset = offset;
1832 return position;
1833 }
1834 // method/constructor/reference type argument
1835 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1836 final int offset = nextChar();
1837 final int type_index = nextByte();
1838 final TypeAnnotationPosition position = TypeAnnotationPosition
1839 .constructorInvocationTypeArg(readTypePath(), type_index);
1840 position.offset = offset;
1841 return position;
1842 }
1843 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1844 final int offset = nextChar();
1845 final int type_index = nextByte();
1846 final TypeAnnotationPosition position = TypeAnnotationPosition
1847 .methodInvocationTypeArg(readTypePath(), type_index);
1848 position.offset = offset;
1849 return position;
1850 }
1851 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1852 final int offset = nextChar();
1853 final int type_index = nextByte();
1854 final TypeAnnotationPosition position = TypeAnnotationPosition
1855 .constructorRefTypeArg(readTypePath(), type_index);
1856 position.offset = offset;
1857 return position;
1858 }
1859 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1860 final int offset = nextChar();
1861 final int type_index = nextByte();
1862 final TypeAnnotationPosition position = TypeAnnotationPosition
1863 .methodRefTypeArg(readTypePath(), type_index);
1864 position.offset = offset;
1865 return position;
1866 }
1867 // We don't need to worry about these
1868 case METHOD_RETURN:
1869 return TypeAnnotationPosition.methodReturn(readTypePath());
1870 case FIELD:
1871 return TypeAnnotationPosition.field(readTypePath());
1872 case UNKNOWN:
1873 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1874 default:
1875 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1876 }
1877 }
1878
1879 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1880 int len = nextByte();
1881 ListBuffer<Integer> loc = new ListBuffer<>();
1882 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1883 loc = loc.append(nextByte());
1884
1885 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1886
1887 }
1888
1889 /**
1890 * Helper function to read an optional pool entry (with given function); this is used while parsing
1891 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor,
1892 * as per JVMS.
1893 */
1894 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) {
1895 return (index == 0) ?
1896 defaultValue :
1897 poolFunc.apply(index);
1898 }
1899
1900 Attribute readAttributeValue() {
1901 char c;
1902 try {
1903 c = (char)buf.getByte(bp++);
1904 } catch (UnderflowException e) {
1905 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1906 }
1907 switch (c) {
1908 case 'B':
1909 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar()));
1910 case 'C':
1911 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar()));
1912 case 'D':
1913 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar()));
1914 case 'F':
1915 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar()));
1916 case 'I':
1917 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar()));
1918 case 'J':
1919 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar()));
1920 case 'S':
1921 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar()));
1922 case 'Z':
1923 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar()));
1924 case 's':
1925 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString());
1926 case 'e':
1927 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar()));
1928 case 'c':
1929 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1930 case '[': {
1931 int n = nextChar();
1932 ListBuffer<Attribute> l = new ListBuffer<>();
1933 for (int i=0; i<n; i++)
1934 l.append(readAttributeValue());
1935 return new ArrayAttributeProxy(l.toList());
1936 }
1937 case '@':
1938 return readCompoundAnnotation();
1939 default:
1940 throw new AssertionError("unknown annotation tag '" + c + "'");
1941 }
1942 }
1943
1944 interface ProxyVisitor extends Attribute.Visitor {
1945 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1946 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1947 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1948 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1949 }
1950
1951 static class EnumAttributeProxy extends Attribute {
1952 Type enumType;
1953 Name enumerator;
1954 public EnumAttributeProxy(Type enumType, Name enumerator) {
1955 super(null);
1956 this.enumType = enumType;
1957 this.enumerator = enumerator;
1958 }
1959 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1960 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1961 public String toString() {
1962 return "/*proxy enum*/" + enumType + "." + enumerator;
1963 }
1964 }
1965
1966 static class ClassAttributeProxy extends Attribute {
1967 Type classType;
1968 public ClassAttributeProxy(Type classType) {
1969 super(null);
1970 this.classType = classType;
1971 }
1972 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1973 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1974 public String toString() {
1975 return "/*proxy class*/" + classType + ".class";
1976 }
1977 }
1978
1979 static class ArrayAttributeProxy extends Attribute {
1980 List<Attribute> values;
1981 ArrayAttributeProxy(List<Attribute> values) {
1982 super(null);
1983 this.values = values;
1984 }
1985 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1986 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1987 public String toString() {
1988 return "{" + values + "}";
1989 }
1990 }
1991
1992 /** A temporary proxy representing a compound attribute.
1993 */
1994 static class CompoundAnnotationProxy extends Attribute {
1995 final List<Pair<Name,Attribute>> values;
1996 public CompoundAnnotationProxy(Type type,
1997 List<Pair<Name,Attribute>> values) {
1998 super(type);
1999 this.values = values;
2000 }
2001 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
2002 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2003 public String toString() {
2004 StringBuilder buf = new StringBuilder();
2005 buf.append("@");
2006 buf.append(type.tsym.getQualifiedName());
2007 buf.append("/*proxy*/{");
2008 boolean first = true;
2009 for (List<Pair<Name,Attribute>> v = values;
2010 v.nonEmpty(); v = v.tail) {
2011 Pair<Name,Attribute> value = v.head;
2012 if (!first) buf.append(",");
2013 first = false;
2014 buf.append(value.fst);
2015 buf.append("=");
2016 buf.append(value.snd);
2017 }
2018 buf.append("}");
2019 return buf.toString();
2020 }
2021 }
2022
2023 /** A temporary proxy representing a type annotation.
2024 */
2025 static class TypeAnnotationProxy {
2026 final CompoundAnnotationProxy compound;
2027 final TypeAnnotationPosition position;
2028 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2029 TypeAnnotationPosition position) {
2030 this.compound = compound;
2031 this.position = position;
2032 }
2033 }
2034
2035 class AnnotationDeproxy implements ProxyVisitor {
2036 private ClassSymbol requestingOwner;
2037
2038 AnnotationDeproxy(ClassSymbol owner) {
2039 this.requestingOwner = owner;
2040 }
2041
2042 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2043 // also must fill in types!!!!
2044 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2045 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2046 buf.append(deproxyCompound(l.head));
2047 }
2048 return buf.toList();
2049 }
2050
2051 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2052 Type annotationType = resolvePossibleProxyType(a.type);
2053 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2054 for (List<Pair<Name,Attribute>> l = a.values;
2055 l.nonEmpty();
2056 l = l.tail) {
2057 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2058 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2059 }
2060 return new Attribute.Compound(annotationType, buf.toList());
2061 }
2062
2063 MethodSymbol findAccessMethod(Type container, Name name) {
2064 CompletionFailure failure = null;
2065 try {
2066 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2067 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2068 return (MethodSymbol) sym;
2069 }
2070 } catch (CompletionFailure ex) {
2071 failure = ex;
2072 }
2073 // The method wasn't found: emit a warning and recover
2074 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2075 try {
2076 if (failure == null) {
2077 lint.logIfEnabled(LintWarnings.AnnotationMethodNotFound(container, name));
2078 } else {
2079 lint.logIfEnabled(LintWarnings.AnnotationMethodNotFoundReason(container,
2080 name,
2081 failure.getDetailValue()));//diagnostic, if present
2082 }
2083 } finally {
2084 log.useSource(prevSource);
2085 }
2086 // Construct a new method type and symbol. Use bottom
2087 // type (typeof null) as return type because this type is
2088 // a subtype of all reference types and can be converted
2089 // to primitive types by unboxing.
2090 MethodType mt = new MethodType(List.nil(),
2091 syms.botType,
2092 List.nil(),
2093 syms.methodClass);
2094 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2095 }
2096
2097 Attribute result;
2098 Type type;
2099 Attribute deproxy(Type t, Attribute a) {
2100 Type oldType = type;
2101 try {
2102 type = t;
2103 a.accept(this);
2104 return result;
2105 } finally {
2106 type = oldType;
2107 }
2108 }
2109
2110 // implement Attribute.Visitor below
2111
2112 public void visitConstant(Attribute.Constant value) {
2113 // assert value.type == type;
2114 result = value;
2115 }
2116
2117 public void visitClass(Attribute.Class clazz) {
2118 result = clazz;
2119 }
2120
2121 public void visitEnum(Attribute.Enum e) {
2122 throw new AssertionError(); // shouldn't happen
2123 }
2124
2125 public void visitCompound(Attribute.Compound compound) {
2126 throw new AssertionError(); // shouldn't happen
2127 }
2128
2129 public void visitArray(Attribute.Array array) {
2130 throw new AssertionError(); // shouldn't happen
2131 }
2132
2133 public void visitError(Attribute.Error e) {
2134 throw new AssertionError(); // shouldn't happen
2135 }
2136
2137 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2138 // type.tsym.flatName() should == proxy.enumFlatName
2139 Type enumType = resolvePossibleProxyType(proxy.enumType);
2140 TypeSymbol enumTypeSym = enumType.tsym;
2141 VarSymbol enumerator = null;
2142 CompletionFailure failure = null;
2143 try {
2144 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2145 if (sym.kind == VAR) {
2146 enumerator = (VarSymbol)sym;
2147 break;
2148 }
2149 }
2150 }
2151 catch (CompletionFailure ex) {
2152 failure = ex;
2153 }
2154 if (enumerator == null) {
2155 if (failure != null) {
2156 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile,
2157 enumTypeSym,
2158 proxy.enumerator,
2159 failure.getDiagnostic()));
2160 } else {
2161 log.warning(Warnings.UnknownEnumConstant(currentClassFile,
2162 enumTypeSym,
2163 proxy.enumerator));
2164 }
2165 result = new Attribute.Enum(enumTypeSym.type,
2166 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2167 } else {
2168 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2169 }
2170 }
2171
2172 @Override
2173 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2174 Type classType = resolvePossibleProxyType(proxy.classType);
2175 result = new Attribute.Class(types, classType);
2176 }
2177
2178 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2179 int length = proxy.values.length();
2180 Attribute[] ats = new Attribute[length];
2181 Type elemtype = types.elemtype(type);
2182 int i = 0;
2183 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2184 ats[i++] = deproxy(elemtype, p.head);
2185 }
2186 result = new Attribute.Array(type, ats);
2187 }
2188
2189 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2190 result = deproxyCompound(proxy);
2191 }
2192
2193 Type resolvePossibleProxyType(Type t) {
2194 if (t instanceof ProxyType proxyType) {
2195 Assert.check(requestingOwner.owner instanceof ModuleSymbol);
2196 ModuleSymbol prevCurrentModule = currentModule;
2197 currentModule = (ModuleSymbol) requestingOwner.owner;
2198 try {
2199 return proxyType.resolve();
2200 } finally {
2201 currentModule = prevCurrentModule;
2202 }
2203 } else {
2204 return t;
2205 }
2206 }
2207 }
2208
2209 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2210 final MethodSymbol sym;
2211 final Attribute value;
2212 final JavaFileObject classFile = currentClassFile;
2213
2214 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2215 super(currentOwner.kind == MTH
2216 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2217 this.sym = sym;
2218 this.value = value;
2219 }
2220
2221 @Override
2222 public void run() {
2223 JavaFileObject previousClassFile = currentClassFile;
2224 try {
2225 // Reset the interim value set earlier in
2226 // attachAnnotationDefault().
2227 sym.defaultValue = null;
2228 currentClassFile = classFile;
2229 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2230 } finally {
2231 currentClassFile = previousClassFile;
2232 }
2233 }
2234
2235 @Override
2236 public String toString() {
2237 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2238 }
2239 }
2240
2241 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2242 final Symbol sym;
2243 final List<CompoundAnnotationProxy> l;
2244 final JavaFileObject classFile;
2245
2246 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2247 super(currentOwner.kind == MTH
2248 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2249 if (sym.kind == TYP && sym.owner.kind == MDL) {
2250 this.sym = sym.owner;
2251 } else {
2252 this.sym = sym;
2253 }
2254 this.l = l;
2255 this.classFile = currentClassFile;
2256 }
2257
2258 @Override
2259 public void run() {
2260 JavaFileObject previousClassFile = currentClassFile;
2261 try {
2262 currentClassFile = classFile;
2263 List<Attribute.Compound> newList = deproxyCompoundList(l);
2264 for (Attribute.Compound attr : newList) {
2265 if (attr.type.tsym == syms.deprecatedType.tsym) {
2266 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2267 Attribute forRemoval = attr.member(names.forRemoval);
2268 if (forRemoval instanceof Attribute.Constant constant) {
2269 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
2270 sym.flags_field |= DEPRECATED_REMOVAL;
2271 }
2272 }
2273 }
2274 }
2275 if (sym.annotationsPendingCompletion()) {
2276 sym.setDeclarationAttributes(newList);
2277 } else {
2278 sym.appendAttributes(newList);
2279 }
2280 } finally {
2281 currentClassFile = previousClassFile;
2282 }
2283 }
2284
2285 @Override
2286 public String toString() {
2287 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2288 }
2289 }
2290
2291 class TypeAnnotationCompleter extends AnnotationCompleter {
2292
2293 List<TypeAnnotationProxy> proxies;
2294
2295 TypeAnnotationCompleter(Symbol sym,
2296 List<TypeAnnotationProxy> proxies) {
2297 super(sym, List.nil());
2298 this.proxies = proxies;
2299 }
2300
2301 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2302 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2303 for (TypeAnnotationProxy proxy: proxies) {
2304 Attribute.Compound compound = deproxyCompound(proxy.compound);
2305 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2306 buf.add(typeCompound);
2307 }
2308 return buf.toList();
2309 }
2310
2311 @Override
2312 public void run() {
2313 JavaFileObject previousClassFile = currentClassFile;
2314 try {
2315 currentClassFile = classFile;
2316 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2317 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2318 addTypeAnnotationsToSymbol(sym, newList);
2319 } finally {
2320 currentClassFile = previousClassFile;
2321 }
2322 }
2323 }
2324
2325 /**
2326 * Rewrites types in the given symbol to include type annotations.
2327 *
2328 * <p>The list of type annotations includes annotations for all types in the signature of the
2329 * symbol. Associating the annotations with the correct type requires interpreting the JVMS
2330 * 4.7.20-A target_type to locate the correct type to rewrite, and then interpreting the JVMS
2331 * 4.7.20.2 type_path to associate the annotation with the correct contained type.
2332 */
2333 private void addTypeAnnotationsToSymbol(Symbol s, List<Attribute.TypeCompound> attributes) {
2334 try {
2335 new TypeAnnotationSymbolVisitor(attributes).visit(s, null);
2336 } catch (CompletionFailure ex) {
2337 JavaFileObject prev = log.useSource(currentClassFile);
2338 try {
2339 log.error(Errors.CantAttachTypeAnnotations(attributes, s.owner, s.name, ex.getDetailValue()));
2340 } finally {
2341 log.useSource(prev);
2342 }
2343 }
2344 }
2345
2346 private static class TypeAnnotationSymbolVisitor
2347 extends Types.DefaultSymbolVisitor<Void, Void> {
2348
2349 private final List<Attribute.TypeCompound> attributes;
2350
2351 private TypeAnnotationSymbolVisitor(List<Attribute.TypeCompound> attributes) {
2352 this.attributes = attributes;
2353 }
2354
2355 /**
2356 * A supertype_index value of 65535 specifies that the annotation appears on the superclass
2357 * in an extends clause of a class declaration, see JVMS 4.7.20.1
2358 */
2359 public static final int SUPERCLASS_INDEX = 65535;
2360
2361 @Override
2362 public Void visitClassSymbol(Symbol.ClassSymbol s, Void unused) {
2363 ClassType t = (ClassType) s.type;
2364 int i = 0;
2365 ListBuffer<Type> interfaces = new ListBuffer<>();
2366 for (Type itf : t.interfaces_field) {
2367 interfaces.add(addTypeAnnotations(itf, classExtends(i++)));
2368 }
2369 t.interfaces_field = interfaces.toList();
2370 t.supertype_field = addTypeAnnotations(t.supertype_field, classExtends(SUPERCLASS_INDEX));
2371 if (t.typarams_field != null) {
2372 t.typarams_field =
2373 rewriteTypeParameters(
2374 t.typarams_field, TargetType.CLASS_TYPE_PARAMETER_BOUND);
2375 }
2376 return null;
2377 }
2378
2379 @Override
2380 public Void visitMethodSymbol(Symbol.MethodSymbol s, Void unused) {
2381 Type t = s.type;
2382 if (t.hasTag(TypeTag.FORALL)) {
2383 Type.ForAll fa = (Type.ForAll) t;
2384 fa.tvars = rewriteTypeParameters(fa.tvars, TargetType.METHOD_TYPE_PARAMETER_BOUND);
2385 t = fa.qtype;
2386 }
2387 MethodType mt = (MethodType) t;
2388 ListBuffer<Type> argtypes = new ListBuffer<>();
2389 int i = 0;
2390 for (Symbol.VarSymbol param : s.params) {
2391 param.type = addTypeAnnotations(param.type, methodFormalParameter(i++));
2392 argtypes.add(param.type);
2393 }
2394 mt.argtypes = argtypes.toList();
2395 ListBuffer<Type> thrown = new ListBuffer<>();
2396 i = 0;
2397 for (Type thrownType : mt.thrown) {
2398 thrown.add(addTypeAnnotations(thrownType, thrownType(i++)));
2399 }
2400 mt.thrown = thrown.toList();
2401 /* possible information loss if the type of the method is void then we can't add type
2402 * annotations to it
2403 */
2404 if (!mt.restype.hasTag(TypeTag.VOID)) {
2405 mt.restype = addTypeAnnotations(mt.restype, TargetType.METHOD_RETURN);
2406 }
2407
2408 Type recvtype = mt.recvtype != null ? mt.recvtype : s.implicitReceiverType();
2409 if (recvtype != null) {
2410 Type annotated = addTypeAnnotations(recvtype, TargetType.METHOD_RECEIVER);
2411 if (annotated != recvtype) {
2412 mt.recvtype = annotated;
2413 }
2414 }
2415 return null;
2416 }
2417
2418 @Override
2419 public Void visitVarSymbol(Symbol.VarSymbol s, Void unused) {
2420 s.type = addTypeAnnotations(s.type, TargetType.FIELD);
2421 return null;
2422 }
2423
2424 @Override
2425 public Void visitSymbol(Symbol s, Void unused) {
2426 return null;
2427 }
2428
2429 private List<Type> rewriteTypeParameters(List<Type> tvars, TargetType boundType) {
2430 ListBuffer<Type> tvarbuf = new ListBuffer<>();
2431 int typeVariableIndex = 0;
2432 for (Type tvar : tvars) {
2433 Type bound = tvar.getUpperBound();
2434 if (bound.isCompound()) {
2435 ClassType ct = (ClassType) bound;
2436 int boundIndex = 0;
2437 if (ct.supertype_field != null) {
2438 ct.supertype_field =
2439 addTypeAnnotations(
2440 ct.supertype_field,
2441 typeParameterBound(
2442 boundType, typeVariableIndex, boundIndex++));
2443 }
2444 ListBuffer<Type> itfbuf = new ListBuffer<>();
2445 for (Type itf : ct.interfaces_field) {
2446 itfbuf.add(
2447 addTypeAnnotations(
2448 itf,
2449 typeParameterBound(
2450 boundType, typeVariableIndex, boundIndex++)));
2451 }
2452 ct.interfaces_field = itfbuf.toList();
2453 } else {
2454 bound =
2455 addTypeAnnotations(
2456 bound,
2457 typeParameterBound(
2458 boundType,
2459 typeVariableIndex,
2460 bound.isInterface() ? 1 : 0));
2461 }
2462 ((TypeVar) tvar).setUpperBound(bound);
2463 tvarbuf.add(tvar);
2464 typeVariableIndex++;
2465 }
2466 return tvarbuf.toList();
2467 }
2468
2469 private Type addTypeAnnotations(Type type, TargetType targetType) {
2470 return addTypeAnnotations(type, pos -> pos.type == targetType);
2471 }
2472
2473 private Type addTypeAnnotations(Type type, Predicate<TypeAnnotationPosition> filter) {
2474 Assert.checkNonNull(type);
2475
2476 // Find type annotations that match the given target type
2477 ListBuffer<Attribute.TypeCompound> filtered = new ListBuffer<>();
2478 for (Attribute.TypeCompound attribute : this.attributes) {
2479 if (filter.test(attribute.position)) {
2480 filtered.add(attribute);
2481 }
2482 }
2483 if (filtered.isEmpty()) {
2484 return type;
2485 }
2486
2487 // Group the matching annotations by their type path. Each group of annotations will be
2488 // added to a type at that location.
2489 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2490 attributesByPath = new HashMap<>();
2491 for (Attribute.TypeCompound attribute : filtered.toList()) {
2492 attributesByPath
2493 .computeIfAbsent(attribute.position.location, k -> new ListBuffer<>())
2494 .add(attribute);
2495 }
2496
2497 // Rewrite the type and add the annotations
2498 type = new TypeAnnotationStructuralTypeMapping(attributesByPath).visit(type, List.nil());
2499
2500 return type;
2501 }
2502
2503 private static Predicate<TypeAnnotationPosition> typeParameterBound(
2504 TargetType targetType, int parameterIndex, int boundIndex) {
2505 return pos ->
2506 pos.type == targetType
2507 && pos.parameter_index == parameterIndex
2508 && pos.bound_index == boundIndex;
2509 }
2510
2511 private static Predicate<TypeAnnotationPosition> methodFormalParameter(int index) {
2512 return pos ->
2513 pos.type == TargetType.METHOD_FORMAL_PARAMETER && pos.parameter_index == index;
2514 }
2515
2516 private static Predicate<TypeAnnotationPosition> thrownType(int index) {
2517 return pos -> pos.type == TargetType.THROWS && pos.type_index == index;
2518 }
2519
2520 private static Predicate<TypeAnnotationPosition> classExtends(int index) {
2521 return pos -> pos.type == TargetType.CLASS_EXTENDS && pos.type_index == index;
2522 }
2523 }
2524
2525 /**
2526 * A type mapping that rewrites the type to include type annotations.
2527 *
2528 * <p>This logic is similar to {@link Type.StructuralTypeMapping}, but also tracks the path to
2529 * the contained types being rewritten, and so cannot easily share the existing logic.
2530 */
2531 private static final class TypeAnnotationStructuralTypeMapping
2532 extends Types.TypeMapping<List<TypeAnnotationPosition.TypePathEntry>> {
2533
2534 private final Map<List<TypeAnnotationPosition.TypePathEntry>,
2535 ListBuffer<Attribute.TypeCompound>> attributesByPath;
2536
2537 private TypeAnnotationStructuralTypeMapping(
2538 Map<List<TypeAnnotationPosition.TypePathEntry>, ListBuffer<Attribute.TypeCompound>>
2539 attributesByPath) {
2540 this.attributesByPath = attributesByPath;
2541 }
2542
2543
2544 @Override
2545 public Type visitClassType(ClassType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2546 // As described in JVMS 4.7.20.2, type annotations on nested types are located with
2547 // 'left-to-right' steps starting on 'the outermost part of the type for which a type
2548 // annotation is admissible'. So the current path represents the outermost containing
2549 // type of the type being visited, and we add type path steps for every contained nested
2550 // type.
2551 Type outer = t.getEnclosingType();
2552 Type outer1 = outer != Type.noType ? visit(outer, path) : outer;
2553 for (Type curr = t.getEnclosingType();
2554 curr != Type.noType;
2555 curr = curr.getEnclosingType()) {
2556 path = path.append(TypeAnnotationPosition.TypePathEntry.INNER_TYPE);
2557 }
2558 List<Type> typarams = t.getTypeArguments();
2559 List<Type> typarams1 = rewriteTypeParams(path, typarams);
2560 if (outer1 != outer || typarams != typarams1) {
2561 t = new ClassType(outer1, typarams1, t.tsym, t.getMetadata());
2562 }
2563 return reannotate(t, path);
2564 }
2565
2566 private List<Type> rewriteTypeParams(
2567 List<TypeAnnotationPosition.TypePathEntry> path, List<Type> typarams) {
2568 var i = IntStream.iterate(0, x -> x + 1).iterator();
2569 return typarams.map(typaram -> visit(typaram,
2570 path.append(new TypeAnnotationPosition.TypePathEntry(
2571 TypeAnnotationPosition.TypePathEntryKind.TYPE_ARGUMENT, i.nextInt()))));
2572 }
2573
2574 @Override
2575 public Type visitWildcardType(
2576 WildcardType wt, List<TypeAnnotationPosition.TypePathEntry> path) {
2577 Type t = wt.type;
2578 if (t != null) {
2579 t = visit(t, path.append(TypeAnnotationPosition.TypePathEntry.WILDCARD));
2580 }
2581 if (t != wt.type) {
2582 wt = new WildcardType(t, wt.kind, wt.tsym, wt.bound, wt.getMetadata());
2583 }
2584 return reannotate(wt, path);
2585 }
2586
2587 @Override
2588 public Type visitArrayType(ArrayType t, List<TypeAnnotationPosition.TypePathEntry> path) {
2589 Type elemtype = t.elemtype;
2590 Type elemtype1 =
2591 visit(elemtype, path.append(TypeAnnotationPosition.TypePathEntry.ARRAY));
2592 if (elemtype1 != elemtype) {
2593 t = new ArrayType(elemtype1, t.tsym, t.getMetadata());
2594 }
2595 return reannotate(t, path);
2596 }
2597
2598 @Override
2599 public Type visitType(Type t, List<TypeAnnotationPosition.TypePathEntry> path) {
2600 return reannotate(t, path);
2601 }
2602
2603 Type reannotate(Type type, List<TypeAnnotationPosition.TypePathEntry> path) {
2604 List<Attribute.TypeCompound> attributes = attributesForPath(path);
2605 if (attributes.isEmpty()) {
2606 return type;
2607 }
2608 // Runtime-visible and -invisible annotations are completed separately, so if the same
2609 // type has annotations from both it will get annotated twice.
2610 TypeMetadata.Annotations existing = type.getMetadata(TypeMetadata.Annotations.class);
2611 if (existing != null) {
2612 existing.annotationBuffer().addAll(attributes);
2613 return type;
2614 }
2615 return type.annotatedType(attributes);
2616 }
2617
2618 List<Attribute.TypeCompound> attributesForPath(
2619 List<TypeAnnotationPosition.TypePathEntry> path) {
2620 ListBuffer<Attribute.TypeCompound> attributes = attributesByPath.remove(path);
2621 return attributes != null ? attributes.toList() : List.nil();
2622 }
2623 }
2624
2625 /* **********************************************************************
2626 * Reading Symbols
2627 ***********************************************************************/
2628
2629 /** Read a field.
2630 */
2631 VarSymbol readField() {
2632 char rawFlags = nextChar();
2633 long flags = adjustFieldFlags(rawFlags);
2634 Name name = poolReader.getName(nextChar());
2635 Type type = poolReader.getType(nextChar());
2636 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2637 readMemberAttrs(v);
2638 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 ||
2639 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1)
2640 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v);
2641 return v;
2642 }
2643
2644 /** Read a method.
2645 */
2646 MethodSymbol readMethod() {
2647 char rawFlags = nextChar();
2648 long flags = adjustMethodFlags(rawFlags);
2649 Name name = poolReader.getName(nextChar());
2650 Type descriptorType = poolReader.getType(nextChar());
2651 Type type = descriptorType;
2652 if (currentOwner.isInterface() &&
2653 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2654 if (majorVersion > Version.V52.major ||
2655 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2656 if ((flags & (STATIC | PRIVATE)) == 0) {
2657 currentOwner.flags_field |= DEFAULT;
2658 flags |= DEFAULT | ABSTRACT;
2659 }
2660 } else {
2661 //protect against ill-formed classfiles
2662 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2663 Integer.toString(majorVersion),
2664 Integer.toString(minorVersion));
2665 }
2666 }
2667 validateMethodType(name, type);
2668 boolean forceLocal = false;
2669 if (name == names.init && currentOwner.hasOuterInstance()) {
2670 // Sometimes anonymous classes don't have an outer
2671 // instance, however, there is no reliable way to tell so
2672 // we never strip this$n
2673 // ditto for local classes. Local classes that have an enclosing method set
2674 // won't pass the "hasOuterInstance" check above, but those that don't have an
2675 // enclosing method (i.e. from initializers) will pass that check.
2676 boolean local = forceLocal =
2677 !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2678 if (!currentOwner.name.isEmpty() && !local)
2679 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2680 type.getReturnType(),
2681 type.getThrownTypes(),
2682 syms.methodClass);
2683 }
2684 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2685 if (types.isSignaturePolymorphic(m)) {
2686 m.flags_field |= SIGNATURE_POLYMORPHIC;
2687 }
2688 if (saveParameterNames)
2689 initParameterNames(m);
2690 Symbol prevOwner = currentOwner;
2691 currentOwner = m;
2692 try {
2693 readMemberAttrs(m);
2694 } finally {
2695 currentOwner = prevOwner;
2696 }
2697 validateMethodType(name, m.type);
2698 adjustParameterAnnotations(m, descriptorType, forceLocal);
2699 setParameters(m, type);
2700
2701 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1)
2702 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m);
2703 if ((flags & VARARGS) != 0) {
2704 final Type last = type.getParameterTypes().last();
2705 if (last == null || !last.hasTag(ARRAY)) {
2706 m.flags_field &= ~VARARGS;
2707 throw badClassFile("malformed.vararg.method", m);
2708 }
2709 }
2710
2711 return m;
2712 }
2713
2714 void validateMethodType(Name name, Type t) {
2715 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) ||
2716 (name == names.init && !t.getReturnType().hasTag(TypeTag.VOID))) {
2717 throw badClassFile("method.descriptor.invalid", name);
2718 }
2719 }
2720
2721 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2722 if (args.isEmpty()) {
2723 return args;
2724 }
2725 boolean isVarargs = (flags & VARARGS) != 0;
2726 if (isVarargs) {
2727 Type varargsElem = args.last();
2728 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2729 for (Type t : args) {
2730 adjustedArgs.append(t != varargsElem ?
2731 t :
2732 ((ArrayType)t).makeVarargs());
2733 }
2734 args = adjustedArgs.toList();
2735 }
2736 return args.tail;
2737 }
2738
2739 /**
2740 * Init the parameter names array.
2741 * Parameter names are currently inferred from the names in the
2742 * LocalVariableTable attributes of a Code attribute.
2743 * (Note: this means parameter names are currently not available for
2744 * methods without a Code attribute.)
2745 * This method initializes an array in which to store the name indexes
2746 * of parameter names found in LocalVariableTable attributes. It is
2747 * slightly supersized to allow for additional slots with a start_pc of 0.
2748 */
2749 void initParameterNames(MethodSymbol sym) {
2750 // make allowance for synthetic parameters.
2751 final int excessSlots = 4;
2752 int expectedParameterSlots =
2753 Code.width(sym.type.getParameterTypes()) + excessSlots;
2754 if (parameterNameIndicesLvt == null
2755 || parameterNameIndicesLvt.length < expectedParameterSlots) {
2756 parameterNameIndicesLvt = new int[expectedParameterSlots];
2757 } else
2758 Arrays.fill(parameterNameIndicesLvt, 0);
2759 }
2760
2761 /**
2762 * Set the parameters for a method symbol, including any names and
2763 * annotations that were read.
2764 *
2765 * <p>The type of the symbol may have changed while reading the
2766 * method attributes (see the Signature attribute). This may be
2767 * because of generic information or because anonymous synthetic
2768 * parameters were added. The original type (as read from the
2769 * method descriptor) is used to help guess the existence of
2770 * anonymous synthetic parameters.
2771 */
2772 void setParameters(MethodSymbol sym, Type jvmType) {
2773 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2774 // the code in readMethod may have skipped the first
2775 // parameter when setting up the MethodType. If so, we
2776 // make a corresponding allowance here for the position of
2777 // the first parameter. Note that this assumes the
2778 // skipped parameter has a width of 1 -- i.e. it is not
2779 // a double width type (long or double.)
2780 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2781 // Sometimes anonymous classes don't have an outer
2782 // instance, however, there is no reliable way to tell so
2783 // we never strip this$n
2784 if (!currentOwner.name.isEmpty())
2785 firstParamLvt += 1;
2786 }
2787
2788 if (sym.type != jvmType) {
2789 // reading the method attributes has caused the
2790 // symbol's type to be changed. (i.e. the Signature
2791 // attribute.) This may happen if there are hidden
2792 // (synthetic) parameters in the descriptor, but not
2793 // in the Signature. The position of these hidden
2794 // parameters is unspecified; for now, assume they are
2795 // at the beginning, and so skip over them. The
2796 // primary case for this is two hidden parameters
2797 // passed into Enum constructors.
2798 int skip = Code.width(jvmType.getParameterTypes())
2799 - Code.width(sym.type.getParameterTypes());
2800 firstParamLvt += skip;
2801 }
2802 Set<Name> paramNames = new HashSet<>();
2803 ListBuffer<VarSymbol> params = new ListBuffer<>();
2804 // we maintain two index pointers, one for the LocalVariableTable attribute
2805 // and the other for the MethodParameters attribute.
2806 // This is needed as the MethodParameters attribute may contain
2807 // name_index = 0 in which case we want to fall back to the LocalVariableTable.
2808 // In such case, we still want to read the flags from the MethodParameters with that index.
2809 int nameIndexLvt = firstParamLvt;
2810 int nameIndexMp = 0;
2811 int annotationIndex = 0;
2812 for (Type t: sym.type.getParameterTypes()) {
2813 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames);
2814 params.append(param);
2815 if (parameterAnnotations != null) {
2816 ParameterAnnotations annotations = parameterAnnotations[annotationIndex];
2817 if (annotations != null && annotations.proxies != null
2818 && !annotations.proxies.isEmpty()) {
2819 annotate.normal(new AnnotationCompleter(param, annotations.proxies));
2820 }
2821 }
2822 nameIndexLvt += Code.width(t);
2823 nameIndexMp++;
2824 annotationIndex++;
2825 }
2826 Assert.check(parameterAnnotations == null ||
2827 parameterAnnotations.length == annotationIndex);
2828 Assert.checkNull(sym.params);
2829 sym.params = params.toList();
2830 parameterAnnotations = null;
2831 parameterNameIndicesLvt = null;
2832 parameterNameIndicesMp = null;
2833 allParameterAccessFlags = null;
2834 parameterAccessFlags = null;
2835 }
2836
2837 void adjustParameterAnnotations(MethodSymbol sym, Type methodDescriptor,
2838 boolean forceLocal) {
2839 if (parameterAnnotations == null) {
2840 return ;
2841 }
2842
2843 //the specification for Runtime(In)VisibleParameterAnnotations does not
2844 //enforce any mapping between the method parameters and the recorded
2845 //parameter annotation. Attempt a number of heuristics to adjust the
2846 //adjust parameterAnnotations to the percieved number of parameters:
2847
2848 int methodParameterCount = sym.type.getParameterTypes().size();
2849
2850 if (methodParameterCount == parameterAnnotations.length) {
2851 //we've got exactly as many parameter annotations as are parameters
2852 //of the method (after considering a possible Signature attribute),
2853 //no need to do anything. the parameter creation code will use
2854 //the 1-1 mapping to restore the annotations:
2855 return ;
2856 }
2857
2858 if (allParameterAccessFlags != null) {
2859 //MethodParameters attribute present, use it:
2860
2861 //count the number of non-synthetic and non-mandatory parameters:
2862 int realParameters = 0;
2863
2864 for (int i = 0; i < allParameterAccessFlags.length; i++) {
2865 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2866 realParameters++;
2867 }
2868 }
2869
2870 int methodDescriptorParameterCount = methodDescriptor.getParameterTypes().size();
2871
2872 if (realParameters == parameterAnnotations.length &&
2873 allParameterAccessFlags.length == methodDescriptorParameterCount) {
2874 //if we have parameter annotations for each non-synthetic/mandatory parameter,
2875 //and if Signature was not present, expand the parameterAnnotations to cover
2876 //all the method descriptor's parameters:
2877 if (sym.type == methodDescriptor) {
2878 ParameterAnnotations[] newParameterAnnotations =
2879 new ParameterAnnotations[methodParameterCount];
2880 int srcIndex = 0;
2881
2882 for (int i = 0; i < methodParameterCount; i++) {
2883 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2884 newParameterAnnotations[i] = parameterAnnotations[srcIndex++];
2885 }
2886 }
2887
2888 parameterAnnotations = newParameterAnnotations;
2889 } else {
2890 dropParameterAnnotations();
2891 }
2892 } else if (realParameters == methodParameterCount &&
2893 methodDescriptorParameterCount == parameterAnnotations.length &&
2894 allParameterAccessFlags.length == methodDescriptorParameterCount) {
2895 //if there are as many parameter annotations as parameters in
2896 //the method descriptor, and as many real parameters as parameters
2897 //in the method's type (after accounting for Signature), shrink
2898 //the parameterAnnotations to only cover the parameters from
2899 //the method's type:
2900 ParameterAnnotations[] newParameterAnnotations =
2901 new ParameterAnnotations[methodParameterCount];
2902 int targetIndex = 0;
2903
2904 for (int i = 0; i < parameterAnnotations.length; i++) {
2905 if ((allParameterAccessFlags[i] & (SYNTHETIC | MANDATED)) == 0) {
2906 newParameterAnnotations[targetIndex++] = parameterAnnotations[i];
2907 }
2908 }
2909
2910 parameterAnnotations = newParameterAnnotations;
2911 } else {
2912 dropParameterAnnotations();
2913 }
2914 return ;
2915 }
2916
2917 if (!sym.isConstructor()) {
2918 //if the number of parameter annotations and the number of parameters
2919 //don't match, we don't have any heuristics to map one to the other
2920 //unless the method is a constructor:
2921 dropParameterAnnotations();
2922 return ;
2923 }
2924
2925 if (sym.owner.isEnum()) {
2926 if (methodParameterCount == parameterAnnotations.length + 2 &&
2927 sym.type == methodDescriptor) {
2928 //handle constructors of enum types without the Signature attribute -
2929 //there are the two synthetic parameters (name and ordinal) in the
2930 //constructor, but there may be only parameter annotations for the
2931 //real non-synthetic parameters:
2932 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[parameterAnnotations.length + 2];
2933 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 2, parameterAnnotations.length);
2934 parameterAnnotations = newParameterAnnotations;
2935 return ;
2936 }
2937 } else if (sym.owner.isDirectlyOrIndirectlyLocal() || forceLocal) {
2938 //local class may capture the enclosing instance (as the first parameter),
2939 //and local variables (as trailing parameters)
2940 //if there are less parameter annotations than parameters, put the existing
2941 //ones starting with offset:
2942 if (methodParameterCount > parameterAnnotations.length &&
2943 sym.type == methodDescriptor) {
2944 ParameterAnnotations[] newParameterAnnotations = new ParameterAnnotations[methodParameterCount];
2945 System.arraycopy(parameterAnnotations, 0, newParameterAnnotations, 1, parameterAnnotations.length);
2946 parameterAnnotations = newParameterAnnotations;
2947 return ;
2948 }
2949 }
2950
2951 //no heuristics worked, drop the annotations:
2952 dropParameterAnnotations();
2953 }
2954
2955 private void dropParameterAnnotations() {
2956 parameterAnnotations = null;
2957 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 }