1 /*
2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.nio.file.ClosedFileSystemException;
33 import java.util.Arrays;
34 import java.util.EnumSet;
35 import java.util.HashMap;
36 import java.util.HashSet;
37 import java.util.Map;
38 import java.util.Set;
39 import java.util.function.IntFunction;
40
41 import javax.lang.model.element.Modifier;
42 import javax.lang.model.element.NestingKind;
43 import javax.tools.JavaFileManager;
44 import javax.tools.JavaFileObject;
45
46 import com.sun.tools.javac.code.Source;
47 import com.sun.tools.javac.code.Source.Feature;
48 import com.sun.tools.javac.code.Type.ClassType.Flavor;
49 import com.sun.tools.javac.comp.Annotate;
50 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
51 import com.sun.tools.javac.code.*;
52 import com.sun.tools.javac.code.Directive.*;
53 import com.sun.tools.javac.code.Lint.LintCategory;
54 import com.sun.tools.javac.code.Scope.WriteableScope;
55 import com.sun.tools.javac.code.Symbol.*;
56 import com.sun.tools.javac.code.Symtab;
57 import com.sun.tools.javac.code.Type.*;
58 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
59 import com.sun.tools.javac.file.BaseFileManager;
60 import com.sun.tools.javac.file.PathFileObject;
61 import com.sun.tools.javac.jvm.ClassFile.Version;
62 import com.sun.tools.javac.jvm.PoolConstant.NameAndType;
63 import com.sun.tools.javac.main.Option;
64 import com.sun.tools.javac.resources.CompilerProperties.Fragments;
65 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
66 import com.sun.tools.javac.util.*;
67 import com.sun.tools.javac.util.ByteBuffer.UnderflowException;
68 import com.sun.tools.javac.util.DefinedBy.Api;
69 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
70 import com.sun.tools.javac.util.JCDiagnostic.Fragment;
71
72 import static com.sun.tools.javac.code.Flags.*;
73 import static com.sun.tools.javac.code.Kinds.Kind.*;
74
75 import com.sun.tools.javac.code.Scope.LookupKind;
76
77 import static com.sun.tools.javac.code.TypeTag.ARRAY;
78 import static com.sun.tools.javac.code.TypeTag.CLASS;
79 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
80 import static com.sun.tools.javac.jvm.ClassFile.*;
81 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
82
83 import static com.sun.tools.javac.main.Option.PARAMETERS;
84
85 /** This class provides operations to read a classfile into an internal
86 * representation. The internal representation is anchored in a
87 * ClassSymbol which contains in its scope symbol representations
88 * for all other definitions in the classfile. Top-level Classes themselves
89 * appear as members of the scopes of PackageSymbols.
90 *
91 * <p><b>This is NOT part of any supported API.
92 * If you write code that depends on this, you do so at your own risk.
93 * This code and its internal interfaces are subject to change or
94 * deletion without notice.</b>
95 */
96 public class ClassReader {
97 /** The context key for the class reader. */
98 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
99
100 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
101
102 private final Annotate annotate;
103
104 /** Switch: verbose output.
105 */
106 boolean verbose;
107
108 /** Switch: allow modules.
109 */
110 boolean allowModules;
111
112 /** Switch: allow primitive classes.
113 */
114 boolean allowPrimitiveClasses;
115
116 /** Switch: allow value classes.
117 */
118 boolean allowValueClasses;
119
120 /** Switch: allow sealed
121 */
122 boolean allowSealedTypes;
123
124 /** Switch: allow records
125 */
126 boolean allowRecords;
127
128 /** Lint option: warn about classfile issues
129 */
130 boolean lintClassfile;
131
132 /** Switch: warn (instead of error) on illegal UTF-8
133 */
134 boolean warnOnIllegalUtf8;
135
136 /** Switch: preserve parameter names from the variable table.
137 */
138 public boolean saveParameterNames;
139
140 /**
141 * The currently selected profile.
142 */
143 public final Profile profile;
144
145 /** The log to use for verbose output
146 */
147 final Log log;
148
149 /** The symbol table. */
150 Symtab syms;
151
152 Types types;
153
154 /** The name table. */
155 final Names names;
156
157 /** Access to files
158 */
159 private final JavaFileManager fileManager;
160
161 /** Factory for diagnostics
162 */
163 JCDiagnostic.Factory diagFactory;
164
165 DeferredCompletionFailureHandler dcfh;
166
167 /**
168 * Support for preview language features.
169 */
170 Preview preview;
171
172 /** The current scope where type variables are entered.
173 */
174 protected WriteableScope typevars;
175
176 private List<InterimUsesDirective> interimUses = List.nil();
177 private List<InterimProvidesDirective> interimProvides = List.nil();
178
179 /** The path name of the class file currently being read.
180 */
181 protected JavaFileObject currentClassFile = null;
182
183 /** The class or method currently being read.
184 */
185 protected Symbol currentOwner = null;
186
187 /** The module containing the class currently being read.
188 */
189 protected ModuleSymbol currentModule = null;
190
191 /** The buffer containing the currently read class file.
192 */
193 ByteBuffer buf = new ByteBuffer(INITIAL_BUFFER_SIZE);
194
195 /** The current input pointer.
196 */
197 protected int bp;
198
199 /** The pool reader.
200 */
201 PoolReader poolReader;
202
203 /** The major version number of the class file being read. */
204 int majorVersion;
205 /** The minor version number of the class file being read. */
206 int minorVersion;
207
208 /** UTF-8 validation level */
209 Convert.Validation utf8validation;
210
211 /** A table to hold the constant pool indices for method parameter
212 * names, as given in LocalVariableTable attributes.
213 */
214 int[] parameterNameIndicesLvt;
215
216 /**
217 * A table to hold the constant pool indices for method parameter
218 * names, as given in the MethodParameters attribute.
219 */
220 int[] parameterNameIndicesMp;
221
222 /**
223 * A table to hold the access flags of the method parameters.
224 */
225 int[] parameterAccessFlags;
226
227 /**
228 * A table to hold annotations for method parameters.
229 */
230 ParameterAnnotations[] parameterAnnotations;
231
232 /**
233 * A holder for parameter annotations.
234 */
235 static class ParameterAnnotations {
236 List<CompoundAnnotationProxy> proxies;
237
238 void add(List<CompoundAnnotationProxy> newAnnotations) {
239 if (proxies == null) {
240 proxies = newAnnotations;
241 } else {
242 proxies = proxies.prependList(newAnnotations);
243 }
244 }
245 }
246
247 /**
248 * The set of attribute names for which warnings have been generated for the current class
249 */
250 Set<Name> warnedAttrs = new HashSet<>();
251
252 /**
253 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
254 * {@code @Target}
255 */
256 CompoundAnnotationProxy target;
257
258 /**
259 * The prototype @Repeatable Attribute.Compound if this class is an annotation annotated with
260 * {@code @Repeatable}
261 */
262 CompoundAnnotationProxy repeatable;
263
264 /** Get the ClassReader instance for this invocation. */
265 public static ClassReader instance(Context context) {
266 ClassReader instance = context.get(classReaderKey);
267 if (instance == null)
268 instance = new ClassReader(context);
269 return instance;
270 }
271
272 /** Construct a new class reader. */
273 @SuppressWarnings("this-escape")
274 protected ClassReader(Context context) {
275 context.put(classReaderKey, this);
276 annotate = Annotate.instance(context);
277 names = Names.instance(context);
278 syms = Symtab.instance(context);
279 types = Types.instance(context);
280 fileManager = context.get(JavaFileManager.class);
281 if (fileManager == null)
282 throw new AssertionError("FileManager initialization error");
283 diagFactory = JCDiagnostic.Factory.instance(context);
284 dcfh = DeferredCompletionFailureHandler.instance(context);
285
286 log = Log.instance(context);
287
288 Options options = Options.instance(context);
289 verbose = options.isSet(Option.VERBOSE);
290
291 Source source = Source.instance(context);
292 preview = Preview.instance(context);
293 allowModules = Feature.MODULES.allowedInSource(source);
294 allowPrimitiveClasses = Feature.PRIMITIVE_CLASSES.allowedInSource(source) && options.isSet("enablePrimitiveClasses");
295 allowValueClasses = Feature.VALUE_CLASSES.allowedInSource(source);
296 allowRecords = Feature.RECORDS.allowedInSource(source);
297 allowSealedTypes = Feature.SEALED_CLASSES.allowedInSource(source);
298 warnOnIllegalUtf8 = Feature.WARN_ON_ILLEGAL_UTF8.allowedInSource(source);
299
300 saveParameterNames = options.isSet(PARAMETERS);
301
302 profile = Profile.instance(context);
303
304 typevars = WriteableScope.create(syms.noSymbol);
305
306 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
307
308 initAttributeReaders();
309 }
310
311 /** Add member to class unless it is synthetic.
312 */
313 private void enterMember(ClassSymbol c, Symbol sym) {
314 // Synthetic members are not entered -- reason lost to history (optimization?).
315 // Lambda methods must be entered because they may have inner classes (which reference them)
316 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
317 c.members_field.enter(sym);
318 }
319
320 /************************************************************************
321 * Error Diagnoses
322 ***********************************************************************/
323
324 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
325 return badClassFile(diagFactory.fragment(key, args));
326 }
327
328 public ClassFinder.BadClassFile badClassFile(Fragment fragment) {
329 return badClassFile(diagFactory.fragment(fragment));
330 }
331
332 public ClassFinder.BadClassFile badClassFile(JCDiagnostic diagnostic) {
333 return new ClassFinder.BadClassFile (
334 currentOwner.enclClass(),
335 currentClassFile,
336 diagnostic,
337 diagFactory,
338 dcfh);
339 }
340
341 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) {
342 return new ClassFinder.BadEnclosingMethodAttr (
343 currentOwner.enclClass(),
344 currentClassFile,
345 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)),
346 diagFactory,
347 dcfh);
348 }
349
350 /************************************************************************
351 * Buffer Access
352 ***********************************************************************/
353
354 /** Read a character.
355 */
356 char nextChar() {
357 char res;
358 try {
359 res = buf.getChar(bp);
360 } catch (UnderflowException e) {
361 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
362 }
363 bp += 2;
364 return res;
365 }
366
367 /** Read a byte.
368 */
369 int nextByte() {
370 try {
371 return buf.getByte(bp++) & 0xFF;
372 } catch (UnderflowException e) {
373 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
374 }
375 }
376
377 /** Read an integer.
378 */
379 int nextInt() {
380 int res;
381 try {
382 res = buf.getInt(bp);
383 } catch (UnderflowException e) {
384 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
385 }
386 bp += 4;
387 return res;
388 }
389
390 /************************************************************************
391 * Constant Pool Access
392 ***********************************************************************/
393
394 /** Read module_flags.
395 */
396 Set<ModuleFlags> readModuleFlags(int flags) {
397 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
398 for (ModuleFlags f : ModuleFlags.values()) {
399 if ((flags & f.value) != 0)
400 set.add(f);
401 }
402 return set;
403 }
404
405 /** Read resolution_flags.
406 */
407 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
408 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
409 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
410 if ((flags & f.value) != 0)
411 set.add(f);
412 }
413 return set;
414 }
415
416 /** Read exports_flags.
417 */
418 Set<ExportsFlag> readExportsFlags(int flags) {
419 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
420 for (ExportsFlag f: ExportsFlag.values()) {
421 if ((flags & f.value) != 0)
422 set.add(f);
423 }
424 return set;
425 }
426
427 /** Read opens_flags.
428 */
429 Set<OpensFlag> readOpensFlags(int flags) {
430 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
431 for (OpensFlag f: OpensFlag.values()) {
432 if ((flags & f.value) != 0)
433 set.add(f);
434 }
435 return set;
436 }
437
438 /** Read requires_flags.
439 */
440 Set<RequiresFlag> readRequiresFlags(int flags) {
441 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
442 for (RequiresFlag f: RequiresFlag.values()) {
443 if ((flags & f.value) != 0)
444 set.add(f);
445 }
446 return set;
447 }
448
449 /************************************************************************
450 * Reading Types
451 ***********************************************************************/
452
453 /** The unread portion of the currently read type is
454 * signature[sigp..siglimit-1].
455 */
456 byte[] signature;
457 int sigp;
458 int siglimit;
459 boolean sigEnterPhase = false;
460
461 /** Convert signature to type, where signature is a byte array segment.
462 */
463 Type sigToType(byte[] sig, int offset, int len) {
464 signature = sig;
465 sigp = offset;
466 siglimit = offset + len;
467 return sigToType();
468 }
469
470 /** Convert signature to type, where signature is implicit.
471 */
472 Type sigToType() {
473 switch ((char) signature[sigp]) {
474 case 'T':
475 sigp++;
476 int start = sigp;
477 while (signature[sigp] != ';') sigp++;
478 sigp++;
479 return sigEnterPhase
480 ? Type.noType
481 : findTypeVar(readName(signature, start, sigp - 1 - start));
482 case '+': {
483 sigp++;
484 Type t = sigToType();
485 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
486 }
487 case '*':
488 sigp++;
489 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
490 syms.boundClass);
491 case '-': {
492 sigp++;
493 Type t = sigToType();
494 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
495 }
496 case 'B':
497 sigp++;
498 return syms.byteType;
499 case 'C':
500 sigp++;
501 return syms.charType;
502 case 'D':
503 sigp++;
504 return syms.doubleType;
505 case 'F':
506 sigp++;
507 return syms.floatType;
508 case 'I':
509 sigp++;
510 return syms.intType;
511 case 'J':
512 sigp++;
513 return syms.longType;
514 case 'Q':
515 case 'L':
516 {
517 // int oldsigp = sigp;
518 if ((char) signature[sigp] == 'Q' && !allowPrimitiveClasses) {
519 throw badClassFile("bad.class.signature",
520 quoteBadSignature());
521 }
522 Type t = classSigToType();
523 if (sigp < siglimit && signature[sigp] == '.')
524 throw badClassFile("deprecated inner class signature syntax " +
525 "(please recompile from source)");
526 /*
527 System.err.println(" decoded " +
528 new String(signature, oldsigp, sigp-oldsigp) +
529 " => " + t + " outer " + t.outer());
530 */
531 return t;
532 }
533 case 'S':
534 sigp++;
535 return syms.shortType;
536 case 'V':
537 sigp++;
538 return syms.voidType;
539 case 'Z':
540 sigp++;
541 return syms.booleanType;
542 case '[':
543 sigp++;
544 return new ArrayType(sigToType(), syms.arrayClass);
545 case '(':
546 sigp++;
547 List<Type> argtypes = sigToTypes(')');
548 Type restype = sigToType();
549 List<Type> thrown = List.nil();
550 while (sigp < siglimit && signature[sigp] == '^') {
551 sigp++;
552 thrown = thrown.prepend(sigToType());
553 }
554 // if there is a typevar in the throws clause we should state it.
555 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
556 if (l.head.hasTag(TYPEVAR)) {
557 l.head.tsym.flags_field |= THROWS;
558 }
559 }
560 return new MethodType(argtypes,
561 restype,
562 thrown.reverse(),
563 syms.methodClass);
564 case '<':
565 typevars = typevars.dup(currentOwner);
566 Type poly = new ForAll(sigToTypeParams(), sigToType());
567 typevars = typevars.leave();
568 return poly;
569 default:
570 throw badClassFile("bad.signature", quoteBadSignature());
571 }
572 }
573
574 byte[] signatureBuffer = new byte[0];
575 int sbp = 0;
576 /** Convert class signature to type, where signature is implicit.
577 */
578 Type classSigToType() {
579 byte prefix = signature[sigp];
580 if (prefix != 'L' && (!allowPrimitiveClasses || prefix != 'Q'))
581 throw badClassFile("bad.class.signature", quoteBadSignature());
582 sigp++;
583 Type outer = Type.noType;
584 Name name;
585 ClassType.Flavor flavor;
586 int startSbp = sbp;
587
588 while (true) {
589 final byte c = signature[sigp++];
590 switch (c) {
591
592 case ';': { // end
593 ClassSymbol t = enterClass(readName(signatureBuffer,
594 startSbp,
595 sbp - startSbp));
596
597 // We are seeing QFoo; or LFoo; The name itself does not shine any light on default val-refness
598 flavor = prefix == 'L' ? Flavor.L_TypeOf_X : Flavor.Q_TypeOf_X;
599 try {
600 if (outer == Type.noType) {
601 ClassType et = (ClassType) t.erasure(types);
602 // Todo: This spews out more objects than before, i.e no reuse with identical flavor
603 return new ClassType(et.getEnclosingType(), List.nil(), et.tsym, et.getMetadata(), flavor);
604 }
605 return new ClassType(outer, List.nil(), t, List.nil(), flavor);
606 } finally {
607 sbp = startSbp;
608 }
609 }
610
611 case '<': // generic arguments
612 ClassSymbol t = enterClass(readName(signatureBuffer,
613 startSbp,
614 sbp - startSbp));
615 // We are seeing QFoo; or LFoo; The name itself does not shine any light on default val-refness
616 flavor = prefix == 'L' ? Flavor.L_TypeOf_X : Flavor.Q_TypeOf_X;
617 outer = new ClassType(outer, sigToTypes('>'), t, List.nil(), flavor) {
618 boolean completed = false;
619 @Override @DefinedBy(Api.LANGUAGE_MODEL)
620 public Type getEnclosingType() {
621 if (!completed) {
622 completed = true;
623 tsym.apiComplete();
624 Type enclosingType = tsym.type.getEnclosingType();
625 if (enclosingType != Type.noType) {
626 List<Type> typeArgs =
627 super.getEnclosingType().allparams();
628 List<Type> typeParams =
629 enclosingType.allparams();
630 if (typeParams.length() != typeArgs.length()) {
631 // no "rare" types
632 super.setEnclosingType(types.erasure(enclosingType));
633 } else {
634 super.setEnclosingType(types.subst(enclosingType,
635 typeParams,
636 typeArgs));
637 }
638 } else {
639 super.setEnclosingType(Type.noType);
640 }
641 }
642 return super.getEnclosingType();
643 }
644 @Override
645 public void setEnclosingType(Type outer) {
646 throw new UnsupportedOperationException();
647 }
648 };
649 switch (signature[sigp++]) {
650 case ';':
651 if (sigp < siglimit && signature[sigp] == '.') {
652 // support old-style GJC signatures
653 // The signature produced was
654 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
655 // rather than say
656 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
657 // so we skip past ".Lfoo/Outer$"
658 sigp += (sbp - startSbp) + // "foo/Outer"
659 3; // ".L" and "$"
660 signatureBuffer[sbp++] = (byte)'$';
661 break;
662 } else {
663 sbp = startSbp;
664 return outer;
665 }
666 case '.':
667 signatureBuffer[sbp++] = (byte)'$';
668 break;
669 default:
670 throw new AssertionError(signature[sigp-1]);
671 }
672 continue;
673
674 case '.':
675 //we have seen an enclosing non-generic class
676 if (outer != Type.noType) {
677 t = enterClass(readName(signatureBuffer,
678 startSbp,
679 sbp - startSbp));
680 // We are seeing QFoo; or LFoo; The name itself does not shine any light on default val-refness
681 flavor = prefix == 'L' ? Flavor.L_TypeOf_X : Flavor.Q_TypeOf_X;
682 outer = new ClassType(outer, List.nil(), t, List.nil(), flavor);
683 }
684 signatureBuffer[sbp++] = (byte)'$';
685 continue;
686 case '/':
687 signatureBuffer[sbp++] = (byte)'.';
688 continue;
689 default:
690 signatureBuffer[sbp++] = c;
691 continue;
692 }
693 }
694 }
695
696 /** Quote a bogus signature for display inside an error message.
697 */
698 String quoteBadSignature() {
699 String sigString;
700 try {
701 sigString = Convert.utf2string(signature, sigp, siglimit - sigp, Convert.Validation.NONE);
702 } catch (InvalidUtfException e) {
703 throw new AssertionError(e);
704 }
705 if (sigString.length() > 32)
706 sigString = sigString.substring(0, 32) + "...";
707 return "\"" + sigString + "\"";
708 }
709
710 /** Convert (implicit) signature to list of types
711 * until `terminator' is encountered.
712 */
713 List<Type> sigToTypes(char terminator) {
714 List<Type> head = List.of(null);
715 List<Type> tail = head;
716 while (signature[sigp] != terminator)
717 tail = tail.setTail(List.of(sigToType()));
718 sigp++;
719 return head.tail;
720 }
721
722 /** Convert signature to type parameters, where signature is a byte
723 * array segment.
724 */
725 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
726 signature = sig;
727 sigp = offset;
728 siglimit = offset + len;
729 return sigToTypeParams();
730 }
731
732 /** Convert signature to type parameters, where signature is implicit.
733 */
734 List<Type> sigToTypeParams() {
735 List<Type> tvars = List.nil();
736 if (signature[sigp] == '<') {
737 sigp++;
738 int start = sigp;
739 sigEnterPhase = true;
740 while (signature[sigp] != '>')
741 tvars = tvars.prepend(sigToTypeParam());
742 sigEnterPhase = false;
743 sigp = start;
744 while (signature[sigp] != '>')
745 sigToTypeParam();
746 sigp++;
747 }
748 return tvars.reverse();
749 }
750
751 /** Convert (implicit) signature to type parameter.
752 */
753 Type sigToTypeParam() {
754 int start = sigp;
755 while (signature[sigp] != ':') sigp++;
756 Name name = readName(signature, start, sigp - start);
757 TypeVar tvar;
758 if (sigEnterPhase) {
759 tvar = new TypeVar(name, currentOwner, syms.botType);
760 typevars.enter(tvar.tsym);
761 } else {
762 tvar = (TypeVar)findTypeVar(name);
763 }
764 List<Type> bounds = List.nil();
765 boolean allInterfaces = false;
766 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
767 sigp++;
768 allInterfaces = true;
769 }
770 while (signature[sigp] == ':') {
771 sigp++;
772 bounds = bounds.prepend(sigToType());
773 }
774 if (!sigEnterPhase) {
775 types.setBounds(tvar, bounds.reverse(), allInterfaces);
776 }
777 return tvar;
778 }
779
780 /** Find type variable with given name in `typevars' scope.
781 */
782 Type findTypeVar(Name name) {
783 Symbol s = typevars.findFirst(name);
784 if (s != null) {
785 return s.type;
786 } else {
787 if (readingClassAttr) {
788 // While reading the class attribute, the supertypes
789 // might refer to a type variable from an enclosing element
790 // (method or class).
791 // If the type variable is defined in the enclosing class,
792 // we can actually find it in
793 // currentOwner.owner.type.getTypeArguments()
794 // However, until we have read the enclosing method attribute
795 // we don't know for sure if this owner is correct. It could
796 // be a method and there is no way to tell before reading the
797 // enclosing method attribute.
798 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
799 missingTypeVariables = missingTypeVariables.prepend(t);
800 // System.err.println("Missing type var " + name);
801 return t;
802 }
803 throw badClassFile("undecl.type.var", name);
804 }
805 }
806
807 private Name readName(byte[] buf, int off, int len) {
808 try {
809 return names.fromUtf(buf, off, len, utf8validation);
810 } catch (InvalidUtfException e) {
811 if (warnOnIllegalUtf8) {
812 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
813 Fragments.BadUtf8ByteSequenceAt(sigp)));
814 return names.fromUtfLax(buf, off, len);
815 }
816 throw badClassFile(Fragments.BadUtf8ByteSequenceAt(sigp));
817 }
818 }
819
820 /************************************************************************
821 * Reading Attributes
822 ***********************************************************************/
823
824 protected enum AttributeKind { CLASS, MEMBER }
825
826 protected abstract class AttributeReader {
827 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
828 this.name = name;
829 this.version = version;
830 this.kinds = kinds;
831 }
832
833 protected boolean accepts(AttributeKind kind) {
834 if (kinds.contains(kind)) {
835 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
836 return true;
837
838 if (lintClassfile && !warnedAttrs.contains(name)) {
839 JavaFileObject prev = log.useSource(currentClassFile);
840 try {
841 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null,
842 Warnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion));
843 } finally {
844 log.useSource(prev);
845 }
846 warnedAttrs.add(name);
847 }
848 }
849 return false;
850 }
851
852 protected abstract void read(Symbol sym, int attrLen);
853
854 protected final Name name;
855 protected final ClassFile.Version version;
856 protected final Set<AttributeKind> kinds;
857 }
858
859 protected Set<AttributeKind> CLASS_ATTRIBUTE =
860 EnumSet.of(AttributeKind.CLASS);
861 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
862 EnumSet.of(AttributeKind.MEMBER);
863 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
864 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
865
866 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
867
868 private void initAttributeReaders() {
869 AttributeReader[] readers = {
870 // v45.3 attributes
871
872 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
873 protected void read(Symbol sym, int attrLen) {
874 if (sym.isInitOrVNew() && sym.type.getParameterTypes().size() == 0) {
875 try {
876 int code_length = buf.getInt(bp + 4);
877 if ((code_length == 1 && buf.getByte(bp + 8) == (byte) ByteCodes.return_) ||
878 (code_length == 5 && buf.getByte(bp + 8) == ByteCodes.aload_0 &&
879 buf.getByte(bp + 9) == (byte) ByteCodes.invokespecial &&
880 buf.getByte(bp + 12) == (byte) ByteCodes.return_)) {
881 sym.flags_field |= EMPTYNOARGCONSTR;
882 }
883 } catch (UnderflowException e) {
884 throw badClassFile("bad.class.truncated.at.offset", Integer.toString(e.getLength()));
885 }
886 }
887 if (saveParameterNames)
888 ((MethodSymbol)sym).code = readCode(sym);
889 else
890 bp = bp + attrLen;
891 }
892 },
893
894 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
895 protected void read(Symbol sym, int attrLen) {
896 Object v = poolReader.getConstant(nextChar());
897 // Ignore ConstantValue attribute if field not final.
898 if ((sym.flags() & FINAL) == 0) {
899 return;
900 }
901 VarSymbol var = (VarSymbol) sym;
902 switch (var.type.getTag()) {
903 case BOOLEAN:
904 case BYTE:
905 case CHAR:
906 case SHORT:
907 case INT:
908 checkType(var, Integer.class, v);
909 break;
910 case LONG:
911 checkType(var, Long.class, v);
912 break;
913 case FLOAT:
914 checkType(var, Float.class, v);
915 break;
916 case DOUBLE:
917 checkType(var, Double.class, v);
918 break;
919 case CLASS:
920 if (var.type.tsym == syms.stringType.tsym) {
921 checkType(var, String.class, v);
922 } else {
923 throw badClassFile("bad.constant.value.type", var.type);
924 }
925 break;
926 default:
927 // ignore ConstantValue attribute if type is not primitive or String
928 return;
929 }
930 if (v instanceof Integer intVal && !var.type.getTag().checkRange(intVal)) {
931 throw badClassFile("bad.constant.range", v, var, var.type);
932 }
933 var.setData(v);
934 }
935
936 void checkType(Symbol var, Class<?> clazz, Object value) {
937 if (!clazz.isInstance(value)) {
938 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName());
939 }
940 }
941 },
942
943 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
944 protected void read(Symbol sym, int attrLen) {
945 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
946
947 s.flags_field |= DEPRECATED;
948 }
949 },
950
951 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
952 protected void read(Symbol sym, int attrLen) {
953 int nexceptions = nextChar();
954 List<Type> thrown = List.nil();
955 for (int j = 0; j < nexceptions; j++)
956 thrown = thrown.prepend(poolReader.getClass(nextChar()).type);
957 if (sym.type.getThrownTypes().isEmpty())
958 sym.type.asMethodType().thrown = thrown.reverse();
959 }
960 },
961
962 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
963 protected void read(Symbol sym, int attrLen) {
964 ClassSymbol c = (ClassSymbol) sym;
965 if (currentModule.module_info == c) {
966 //prevent entering the classes too soon:
967 skipInnerClasses();
968 } else {
969 readInnerClasses(c);
970 }
971 }
972 },
973
974 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
975 protected void read(Symbol sym, int attrLen) {
976 int newbp = bp + attrLen;
977 if (saveParameterNames) {
978 // Pick up parameter names from the variable table.
979 // Parameter names are not explicitly identified as such,
980 // but all parameter name entries in the LocalVariableTable
981 // have a start_pc of 0. Therefore, we record the name
982 // indices of all slots with a start_pc of zero in the
983 // parameterNameIndices array.
984 // Note that this implicitly honors the JVMS spec that
985 // there may be more than one LocalVariableTable, and that
986 // there is no specified ordering for the entries.
987 int numEntries = nextChar();
988 for (int i = 0; i < numEntries; i++) {
989 int start_pc = nextChar();
990 int length = nextChar();
991 int nameIndex = nextChar();
992 int sigIndex = nextChar();
993 int register = nextChar();
994 if (start_pc == 0) {
995 // ensure array large enough
996 if (register >= parameterNameIndicesLvt.length) {
997 int newSize =
998 Math.max(register + 1, parameterNameIndicesLvt.length + 8);
999 parameterNameIndicesLvt =
1000 Arrays.copyOf(parameterNameIndicesLvt, newSize);
1001 }
1002 parameterNameIndicesLvt[register] = nameIndex;
1003 }
1004 }
1005 }
1006 bp = newbp;
1007 }
1008 },
1009
1010 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1011 protected void read(Symbol sym, int attrLen) {
1012 ClassSymbol c = (ClassSymbol) sym;
1013 Name n = poolReader.getName(nextChar());
1014 c.sourcefile = new SourceFileObject(n);
1015 // If the class is a toplevel class, originating from a Java source file,
1016 // but the class name does not match the file name, then it is
1017 // an auxiliary class.
1018 String sn = n.toString();
1019 if (c.owner.kind == PCK &&
1020 sn.endsWith(".java") &&
1021 !sn.equals(c.name.toString()+".java")) {
1022 c.flags_field |= AUXILIARY;
1023 }
1024 }
1025 },
1026
1027 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1028 protected void read(Symbol sym, int attrLen) {
1029 sym.flags_field |= SYNTHETIC;
1030 }
1031 },
1032
1033 // standard v49 attributes
1034
1035 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1036 protected void read(Symbol sym, int attrLen) {
1037 int newbp = bp + attrLen;
1038 readEnclosingMethodAttr(sym);
1039 bp = newbp;
1040 }
1041 },
1042
1043 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1044 protected void read(Symbol sym, int attrLen) {
1045 if (sym.kind == TYP) {
1046 ClassSymbol c = (ClassSymbol) sym;
1047 readingClassAttr = true;
1048 try {
1049 ClassType ct1 = (ClassType)c.type;
1050 Assert.check(c == currentOwner);
1051 ct1.typarams_field = poolReader.getName(nextChar())
1052 .map(ClassReader.this::sigToTypeParams);
1053 ct1.supertype_field = sigToType();
1054 ListBuffer<Type> is = new ListBuffer<>();
1055 while (sigp != siglimit) is.append(sigToType());
1056 ct1.interfaces_field = is.toList();
1057 } finally {
1058 readingClassAttr = false;
1059 }
1060 } else {
1061 List<Type> thrown = sym.type.getThrownTypes();
1062 sym.type = poolReader.getType(nextChar());
1063 //- System.err.println(" # " + sym.type);
1064 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1065 sym.type.asMethodType().thrown = thrown;
1066 // Map value class factory methods back to constructors for the benefit of earlier pipeline stages
1067 if (sym.kind == MTH && sym.name == names.vnew && !sym.type.getReturnType().hasTag(TypeTag.VOID)) {
1068 sym.type = new MethodType(sym.type.getParameterTypes(),
1069 syms.voidType,
1070 sym.type.getThrownTypes(),
1071 syms.methodClass);
1072 }
1073
1074 }
1075 }
1076 },
1077
1078 // v49 annotation attributes
1079
1080 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1081 protected void read(Symbol sym, int attrLen) {
1082 attachAnnotationDefault(sym);
1083 }
1084 },
1085
1086 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1087 protected void read(Symbol sym, int attrLen) {
1088 attachAnnotations(sym);
1089 }
1090 },
1091
1092 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1093 protected void read(Symbol sym, int attrLen) {
1094 readParameterAnnotations(sym);
1095 }
1096 },
1097
1098 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1099 protected void read(Symbol sym, int attrLen) {
1100 attachAnnotations(sym);
1101 }
1102 },
1103
1104 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1105 protected void read(Symbol sym, int attrLen) {
1106 readParameterAnnotations(sym);
1107 }
1108 },
1109
1110 // additional "legacy" v49 attributes, superseded by flags
1111
1112 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1113 protected void read(Symbol sym, int attrLen) {
1114 sym.flags_field |= ANNOTATION;
1115 }
1116 },
1117
1118 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1119 protected void read(Symbol sym, int attrLen) {
1120 sym.flags_field |= BRIDGE;
1121 }
1122 },
1123
1124 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1125 protected void read(Symbol sym, int attrLen) {
1126 sym.flags_field |= ENUM;
1127 }
1128 },
1129
1130 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1131 protected void read(Symbol sym, int attrLen) {
1132 sym.flags_field |= VARARGS;
1133 }
1134 },
1135
1136 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1137 protected void read(Symbol sym, int attrLen) {
1138 attachTypeAnnotations(sym);
1139 }
1140 },
1141
1142 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1143 protected void read(Symbol sym, int attrLen) {
1144 attachTypeAnnotations(sym);
1145 }
1146 },
1147
1148 // The following attributes for a Code attribute are not currently handled
1149 // StackMapTable
1150 // SourceDebugExtension
1151 // LineNumberTable
1152 // LocalVariableTypeTable
1153
1154 // standard v52 attributes
1155
1156 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1157 protected void read(Symbol sym, int attrlen) {
1158 int newbp = bp + attrlen;
1159 if (saveParameterNames) {
1160 int numEntries = nextByte();
1161 parameterNameIndicesMp = new int[numEntries];
1162 parameterAccessFlags = new int[numEntries];
1163 int index = 0;
1164 for (int i = 0; i < numEntries; i++) {
1165 int nameIndex = nextChar();
1166 int flags = nextChar();
1167 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) {
1168 continue;
1169 }
1170 parameterNameIndicesMp[index] = nameIndex;
1171 parameterAccessFlags[index] = flags;
1172 index++;
1173 }
1174 }
1175 bp = newbp;
1176 }
1177 },
1178
1179 // standard v53 attributes
1180
1181 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1182 @Override
1183 protected boolean accepts(AttributeKind kind) {
1184 return super.accepts(kind) && allowModules;
1185 }
1186 protected void read(Symbol sym, int attrLen) {
1187 if (sym.kind == TYP && sym.owner.kind == MDL) {
1188 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1189 ListBuffer<Directive> directives = new ListBuffer<>();
1190
1191 Name moduleName = poolReader.peekModuleName(nextChar(), ClassReader.this::readName);
1192 if (currentModule.name != moduleName) {
1193 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1194 }
1195
1196 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar());
1197 msym.flags.addAll(moduleFlags);
1198 msym.version = optPoolEntry(nextChar(), poolReader::getName, null);
1199
1200 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1201 int nrequires = nextChar();
1202 for (int i = 0; i < nrequires; i++) {
1203 ModuleSymbol rsym = poolReader.getModule(nextChar());
1204 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1205 if (rsym == syms.java_base && majorVersion >= V54.major) {
1206 if (flags.contains(RequiresFlag.TRANSITIVE)) {
1207 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE);
1208 }
1209 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1210 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1211 }
1212 }
1213 nextChar(); // skip compiled version
1214 requires.add(new RequiresDirective(rsym, flags));
1215 }
1216 msym.requires = requires.toList();
1217 directives.addAll(msym.requires);
1218
1219 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1220 int nexports = nextChar();
1221 for (int i = 0; i < nexports; i++) {
1222 PackageSymbol p = poolReader.getPackage(nextChar());
1223 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1224 int nto = nextChar();
1225 List<ModuleSymbol> to;
1226 if (nto == 0) {
1227 to = null;
1228 } else {
1229 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1230 for (int t = 0; t < nto; t++)
1231 lb.append(poolReader.getModule(nextChar()));
1232 to = lb.toList();
1233 }
1234 exports.add(new ExportsDirective(p, to, flags));
1235 }
1236 msym.exports = exports.toList();
1237 directives.addAll(msym.exports);
1238 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1239 int nopens = nextChar();
1240 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1241 throw badClassFile("module.non.zero.opens", currentModule.name);
1242 }
1243 for (int i = 0; i < nopens; i++) {
1244 PackageSymbol p = poolReader.getPackage(nextChar());
1245 Set<OpensFlag> flags = readOpensFlags(nextChar());
1246 int nto = nextChar();
1247 List<ModuleSymbol> to;
1248 if (nto == 0) {
1249 to = null;
1250 } else {
1251 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1252 for (int t = 0; t < nto; t++)
1253 lb.append(poolReader.getModule(nextChar()));
1254 to = lb.toList();
1255 }
1256 opens.add(new OpensDirective(p, to, flags));
1257 }
1258 msym.opens = opens.toList();
1259 directives.addAll(msym.opens);
1260
1261 msym.directives = directives.toList();
1262
1263 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1264 int nuses = nextChar();
1265 for (int i = 0; i < nuses; i++) {
1266 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1267 uses.add(new InterimUsesDirective(srvc));
1268 }
1269 interimUses = uses.toList();
1270
1271 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1272 int nprovides = nextChar();
1273 for (int p = 0; p < nprovides; p++) {
1274 Name srvc = poolReader.peekClassName(nextChar(), this::classNameMapper);
1275 int nimpls = nextChar();
1276 ListBuffer<Name> impls = new ListBuffer<>();
1277 for (int i = 0; i < nimpls; i++) {
1278 impls.append(poolReader.peekClassName(nextChar(), this::classNameMapper));
1279 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1280 }
1281 }
1282 interimProvides = provides.toList();
1283 }
1284 }
1285
1286 private Name classNameMapper(byte[] arr, int offset, int length) throws InvalidUtfException {
1287 byte[] buf = ClassFile.internalize(arr, offset, length);
1288 try {
1289 return names.fromUtf(buf, 0, buf.length, utf8validation);
1290 } catch (InvalidUtfException e) {
1291 if (warnOnIllegalUtf8) {
1292 log.warning(Warnings.InvalidUtf8InClassfile(currentClassFile,
1293 Fragments.BadUtf8ByteSequenceAt(e.getOffset())));
1294 return names.fromUtfLax(buf, 0, buf.length);
1295 }
1296 throw e;
1297 }
1298 }
1299 },
1300
1301 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1302 @Override
1303 protected boolean accepts(AttributeKind kind) {
1304 return super.accepts(kind) && allowModules;
1305 }
1306 protected void read(Symbol sym, int attrLen) {
1307 if (sym.kind == TYP && sym.owner.kind == MDL) {
1308 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1309 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1310 }
1311 }
1312 },
1313
1314 new AttributeReader(names.Record, V58, CLASS_ATTRIBUTE) {
1315 @Override
1316 protected boolean accepts(AttributeKind kind) {
1317 return super.accepts(kind) && allowRecords;
1318 }
1319 protected void read(Symbol sym, int attrLen) {
1320 if (sym.kind == TYP) {
1321 sym.flags_field |= RECORD;
1322 }
1323 int componentCount = nextChar();
1324 ListBuffer<RecordComponent> components = new ListBuffer<>();
1325 for (int i = 0; i < componentCount; i++) {
1326 Name name = poolReader.getName(nextChar());
1327 Type type = poolReader.getType(nextChar());
1328 RecordComponent c = new RecordComponent(name, type, sym);
1329 readAttrs(c, AttributeKind.MEMBER);
1330 components.add(c);
1331 }
1332 ((ClassSymbol) sym).setRecordComponents(components.toList());
1333 }
1334 },
1335 new AttributeReader(names.PermittedSubclasses, V59, CLASS_ATTRIBUTE) {
1336 @Override
1337 protected boolean accepts(AttributeKind kind) {
1338 return super.accepts(kind) && allowSealedTypes;
1339 }
1340 protected void read(Symbol sym, int attrLen) {
1341 if (sym.kind == TYP) {
1342 ListBuffer<Symbol> subtypes = new ListBuffer<>();
1343 int numberOfPermittedSubtypes = nextChar();
1344 for (int i = 0; i < numberOfPermittedSubtypes; i++) {
1345 subtypes.add(poolReader.getClass(nextChar()));
1346 }
1347 ((ClassSymbol)sym).permitted = subtypes.toList();
1348 }
1349 }
1350 },
1351 };
1352
1353 for (AttributeReader r: readers)
1354 attributeReaders.put(r.name, r);
1355 }
1356
1357 protected void readEnclosingMethodAttr(Symbol sym) {
1358 // sym is a nested class with an "Enclosing Method" attribute
1359 // remove sym from it's current owners scope and place it in
1360 // the scope specified by the attribute
1361 sym.owner.members().remove(sym);
1362 ClassSymbol self = (ClassSymbol)sym;
1363 ClassSymbol c = poolReader.getClass(nextChar());
1364 NameAndType nt = optPoolEntry(nextChar(), poolReader::getNameAndType, null);
1365
1366 if (c.members_field == null || c.kind != TYP)
1367 throw badClassFile("bad.enclosing.class", self, c);
1368
1369 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1370 if (nt != null && m == null)
1371 throw badEnclosingMethod(self);
1372
1373 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1374 self.owner = m != null ? m : c;
1375 if (self.name.isEmpty())
1376 self.fullname = names.empty;
1377 else
1378 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1379
1380 if (m != null) {
1381 ((ClassType)sym.type).setEnclosingType(m.type);
1382 } else if ((self.flags_field & STATIC) == 0) {
1383 ((ClassType)sym.type).setEnclosingType(c.type);
1384 } else {
1385 ((ClassType)sym.type).setEnclosingType(Type.noType);
1386 }
1387 enterTypevars(self, self.type);
1388 if (!missingTypeVariables.isEmpty()) {
1389 ListBuffer<Type> typeVars = new ListBuffer<>();
1390 for (Type typevar : missingTypeVariables) {
1391 typeVars.append(findTypeVar(typevar.tsym.name));
1392 }
1393 foundTypeVariables = typeVars.toList();
1394 } else {
1395 foundTypeVariables = List.nil();
1396 }
1397 }
1398
1399 // See java.lang.Class
1400 private Name simpleBinaryName(Name self, Name enclosing) {
1401 if (!self.startsWith(enclosing)) {
1402 throw badClassFile("bad.enclosing.method", self);
1403 }
1404
1405 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1406 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1407 throw badClassFile("bad.enclosing.method", self);
1408 int index = 1;
1409 while (index < simpleBinaryName.length() &&
1410 isAsciiDigit(simpleBinaryName.charAt(index)))
1411 index++;
1412 return names.fromString(simpleBinaryName.substring(index));
1413 }
1414
1415 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1416 if (nt == null)
1417 return null;
1418
1419 MethodType type = nt.type.asMethodType();
1420
1421 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1422 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1423 return (MethodSymbol)sym;
1424 }
1425
1426 if (!names.isInitOrVNew(nt.name))
1427 // not a constructor
1428 return null;
1429 if ((flags & INTERFACE) != 0)
1430 // no enclosing instance
1431 return null;
1432 if (nt.type.getParameterTypes().isEmpty())
1433 // no parameters
1434 return null;
1435
1436 // A constructor of an inner class.
1437 // Remove the first argument (the enclosing instance)
1438 nt = new NameAndType(nt.name, new MethodType(nt.type.getParameterTypes().tail,
1439 nt.type.getReturnType(),
1440 nt.type.getThrownTypes(),
1441 syms.methodClass));
1442 // Try searching again
1443 return findMethod(nt, scope, flags);
1444 }
1445
1446 /** Similar to Types.isSameType but avoids completion */
1447 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1448 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1449 .prepend(types.erasure(mt1.getReturnType()));
1450 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1451 while (!types1.isEmpty() && !types2.isEmpty()) {
1452 if (types1.head.tsym != types2.head.tsym)
1453 return false;
1454 types1 = types1.tail;
1455 types2 = types2.tail;
1456 }
1457 return types1.isEmpty() && types2.isEmpty();
1458 }
1459
1460 /**
1461 * Character.isDigit answers <tt>true</tt> to some non-ascii
1462 * digits. This one does not. <b>copied from java.lang.Class</b>
1463 */
1464 private static boolean isAsciiDigit(char c) {
1465 return '0' <= c && c <= '9';
1466 }
1467
1468 /** Read member attributes.
1469 */
1470 void readMemberAttrs(Symbol sym) {
1471 readAttrs(sym, AttributeKind.MEMBER);
1472 }
1473
1474 void readAttrs(Symbol sym, AttributeKind kind) {
1475 char ac = nextChar();
1476 for (int i = 0; i < ac; i++) {
1477 Name attrName = poolReader.getName(nextChar());
1478 int attrLen = nextInt();
1479 AttributeReader r = attributeReaders.get(attrName);
1480 if (r != null && r.accepts(kind))
1481 r.read(sym, attrLen);
1482 else {
1483 bp = bp + attrLen;
1484 }
1485 }
1486 }
1487
1488 private boolean readingClassAttr = false;
1489 private List<Type> missingTypeVariables = List.nil();
1490 private List<Type> foundTypeVariables = List.nil();
1491
1492 /** Read class attributes.
1493 */
1494 void readClassAttrs(ClassSymbol c) {
1495 readAttrs(c, AttributeKind.CLASS);
1496 }
1497
1498 /** Read code block.
1499 */
1500 Code readCode(Symbol owner) {
1501 nextChar(); // max_stack
1502 nextChar(); // max_locals
1503 final int code_length = nextInt();
1504 bp += code_length;
1505 final char exception_table_length = nextChar();
1506 bp += exception_table_length * 8;
1507 readMemberAttrs(owner);
1508 return null;
1509 }
1510
1511 /************************************************************************
1512 * Reading Java-language annotations
1513 ***********************************************************************/
1514
1515 /**
1516 * Save annotations.
1517 */
1518 List<CompoundAnnotationProxy> readAnnotations() {
1519 int numAttributes = nextChar();
1520 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1521 for (int i = 0; i < numAttributes; i++) {
1522 annotations.append(readCompoundAnnotation());
1523 }
1524 return annotations.toList();
1525 }
1526
1527 /** Attach annotations.
1528 */
1529 void attachAnnotations(final Symbol sym) {
1530 attachAnnotations(sym, readAnnotations());
1531 }
1532
1533 /**
1534 * Attach annotations.
1535 */
1536 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1537 if (annotations.isEmpty()) {
1538 return;
1539 }
1540 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1541 for (CompoundAnnotationProxy proxy : annotations) {
1542 if (proxy.type.tsym.flatName() == syms.proprietaryType.tsym.flatName())
1543 sym.flags_field |= PROPRIETARY;
1544 else if (proxy.type.tsym.flatName() == syms.profileType.tsym.flatName()) {
1545 if (profile != Profile.DEFAULT) {
1546 for (Pair<Name, Attribute> v : proxy.values) {
1547 if (v.fst == names.value && v.snd instanceof Attribute.Constant constant) {
1548 if (constant.type == syms.intType && ((Integer) constant.value) > profile.value) {
1549 sym.flags_field |= NOT_IN_PROFILE;
1550 }
1551 }
1552 }
1553 }
1554 } else if (proxy.type.tsym.flatName() == syms.previewFeatureInternalType.tsym.flatName()) {
1555 sym.flags_field |= PREVIEW_API;
1556 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1557 } else if (proxy.type.tsym.flatName() == syms.valueBasedInternalType.tsym.flatName()) {
1558 Assert.check(sym.kind == TYP);
1559 sym.flags_field |= VALUE_BASED;
1560 } else {
1561 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1562 target = proxy;
1563 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1564 repeatable = proxy;
1565 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1566 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1567 setFlagIfAttributeTrue(proxy, sym, names.forRemoval, DEPRECATED_REMOVAL);
1568 } else if (proxy.type.tsym == syms.previewFeatureType.tsym) {
1569 sym.flags_field |= PREVIEW_API;
1570 setFlagIfAttributeTrue(proxy, sym, names.reflective, PREVIEW_REFLECTIVE);
1571 } else if (proxy.type.tsym == syms.valueBasedType.tsym && sym.kind == TYP) {
1572 sym.flags_field |= VALUE_BASED;
1573 }
1574 proxies.append(proxy);
1575 }
1576 }
1577 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1578 }
1579 //where:
1580 private void setFlagIfAttributeTrue(CompoundAnnotationProxy proxy, Symbol sym, Name attribute, long flag) {
1581 for (Pair<Name, Attribute> v : proxy.values) {
1582 if (v.fst == attribute && v.snd instanceof Attribute.Constant constant) {
1583 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
1584 sym.flags_field |= flag;
1585 }
1586 }
1587 }
1588 }
1589
1590 /** Read parameter annotations.
1591 */
1592 void readParameterAnnotations(Symbol meth) {
1593 int numParameters;
1594 try {
1595 numParameters = buf.getByte(bp++) & 0xFF;
1596 } catch (UnderflowException e) {
1597 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1598 }
1599 if (parameterAnnotations == null) {
1600 parameterAnnotations = new ParameterAnnotations[numParameters];
1601 } else if (parameterAnnotations.length != numParameters) {
1602 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1603 }
1604 for (int pnum = 0; pnum < numParameters; pnum++) {
1605 if (parameterAnnotations[pnum] == null) {
1606 parameterAnnotations[pnum] = new ParameterAnnotations();
1607 }
1608 parameterAnnotations[pnum].add(readAnnotations());
1609 }
1610 }
1611
1612 void attachTypeAnnotations(final Symbol sym) {
1613 int numAttributes = nextChar();
1614 if (numAttributes != 0) {
1615 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1616 for (int i = 0; i < numAttributes; i++)
1617 proxies.append(readTypeAnnotation());
1618 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1619 }
1620 }
1621
1622 /** Attach the default value for an annotation element.
1623 */
1624 void attachAnnotationDefault(final Symbol sym) {
1625 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1626 final Attribute value = readAttributeValue();
1627
1628 // The default value is set later during annotation. It might
1629 // be the case that the Symbol sym is annotated _after_ the
1630 // repeating instances that depend on this default value,
1631 // because of this we set an interim value that tells us this
1632 // element (most likely) has a default.
1633 //
1634 // Set interim value for now, reset just before we do this
1635 // properly at annotate time.
1636 meth.defaultValue = value;
1637 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1638 }
1639
1640 Type readTypeOrClassSymbol(int i) {
1641 return readTypeToProxy(i);
1642 }
1643 Type readTypeToProxy(int i) {
1644 if (currentModule.module_info == currentOwner) {
1645 return new ProxyType(i);
1646 } else {
1647 return poolReader.getType(i);
1648 }
1649 }
1650
1651 CompoundAnnotationProxy readCompoundAnnotation() {
1652 Type t;
1653 if (currentModule.module_info == currentOwner) {
1654 int cpIndex = nextChar();
1655 t = new ProxyType(cpIndex);
1656 } else {
1657 t = readTypeOrClassSymbol(nextChar());
1658 }
1659 int numFields = nextChar();
1660 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1661 for (int i=0; i<numFields; i++) {
1662 Name name = poolReader.getName(nextChar());
1663 Attribute value = readAttributeValue();
1664 pairs.append(new Pair<>(name, value));
1665 }
1666 return new CompoundAnnotationProxy(t, pairs.toList());
1667 }
1668
1669 TypeAnnotationProxy readTypeAnnotation() {
1670 TypeAnnotationPosition position = readPosition();
1671 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1672
1673 return new TypeAnnotationProxy(proxy, position);
1674 }
1675
1676 TypeAnnotationPosition readPosition() {
1677 int tag = nextByte(); // TargetType tag is a byte
1678
1679 if (!TargetType.isValidTargetTypeValue(tag))
1680 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1681
1682 TargetType type = TargetType.fromTargetTypeValue(tag);
1683
1684 switch (type) {
1685 // instanceof
1686 case INSTANCEOF: {
1687 final int offset = nextChar();
1688 final TypeAnnotationPosition position =
1689 TypeAnnotationPosition.instanceOf(readTypePath());
1690 position.offset = offset;
1691 return position;
1692 }
1693 // new expression
1694 case NEW: {
1695 final int offset = nextChar();
1696 final TypeAnnotationPosition position =
1697 TypeAnnotationPosition.newObj(readTypePath());
1698 position.offset = offset;
1699 return position;
1700 }
1701 // constructor/method reference receiver
1702 case CONSTRUCTOR_REFERENCE: {
1703 final int offset = nextChar();
1704 final TypeAnnotationPosition position =
1705 TypeAnnotationPosition.constructorRef(readTypePath());
1706 position.offset = offset;
1707 return position;
1708 }
1709 case METHOD_REFERENCE: {
1710 final int offset = nextChar();
1711 final TypeAnnotationPosition position =
1712 TypeAnnotationPosition.methodRef(readTypePath());
1713 position.offset = offset;
1714 return position;
1715 }
1716 // local variable
1717 case LOCAL_VARIABLE: {
1718 final int table_length = nextChar();
1719 final int[] newLvarOffset = new int[table_length];
1720 final int[] newLvarLength = new int[table_length];
1721 final int[] newLvarIndex = new int[table_length];
1722
1723 for (int i = 0; i < table_length; ++i) {
1724 newLvarOffset[i] = nextChar();
1725 newLvarLength[i] = nextChar();
1726 newLvarIndex[i] = nextChar();
1727 }
1728
1729 final TypeAnnotationPosition position =
1730 TypeAnnotationPosition.localVariable(readTypePath());
1731 position.lvarOffset = newLvarOffset;
1732 position.lvarLength = newLvarLength;
1733 position.lvarIndex = newLvarIndex;
1734 return position;
1735 }
1736 // resource variable
1737 case RESOURCE_VARIABLE: {
1738 final int table_length = nextChar();
1739 final int[] newLvarOffset = new int[table_length];
1740 final int[] newLvarLength = new int[table_length];
1741 final int[] newLvarIndex = new int[table_length];
1742
1743 for (int i = 0; i < table_length; ++i) {
1744 newLvarOffset[i] = nextChar();
1745 newLvarLength[i] = nextChar();
1746 newLvarIndex[i] = nextChar();
1747 }
1748
1749 final TypeAnnotationPosition position =
1750 TypeAnnotationPosition.resourceVariable(readTypePath());
1751 position.lvarOffset = newLvarOffset;
1752 position.lvarLength = newLvarLength;
1753 position.lvarIndex = newLvarIndex;
1754 return position;
1755 }
1756 // exception parameter
1757 case EXCEPTION_PARAMETER: {
1758 final int exception_index = nextChar();
1759 final TypeAnnotationPosition position =
1760 TypeAnnotationPosition.exceptionParameter(readTypePath());
1761 position.setExceptionIndex(exception_index);
1762 return position;
1763 }
1764 // method receiver
1765 case METHOD_RECEIVER:
1766 return TypeAnnotationPosition.methodReceiver(readTypePath());
1767 // type parameter
1768 case CLASS_TYPE_PARAMETER: {
1769 final int parameter_index = nextByte();
1770 return TypeAnnotationPosition
1771 .typeParameter(readTypePath(), parameter_index);
1772 }
1773 case METHOD_TYPE_PARAMETER: {
1774 final int parameter_index = nextByte();
1775 return TypeAnnotationPosition
1776 .methodTypeParameter(readTypePath(), parameter_index);
1777 }
1778 // type parameter bound
1779 case CLASS_TYPE_PARAMETER_BOUND: {
1780 final int parameter_index = nextByte();
1781 final int bound_index = nextByte();
1782 return TypeAnnotationPosition
1783 .typeParameterBound(readTypePath(), parameter_index,
1784 bound_index);
1785 }
1786 case METHOD_TYPE_PARAMETER_BOUND: {
1787 final int parameter_index = nextByte();
1788 final int bound_index = nextByte();
1789 return TypeAnnotationPosition
1790 .methodTypeParameterBound(readTypePath(), parameter_index,
1791 bound_index);
1792 }
1793 // class extends or implements clause
1794 case CLASS_EXTENDS: {
1795 final int type_index = nextChar();
1796 return TypeAnnotationPosition.classExtends(readTypePath(),
1797 type_index);
1798 }
1799 // throws
1800 case THROWS: {
1801 final int type_index = nextChar();
1802 return TypeAnnotationPosition.methodThrows(readTypePath(),
1803 type_index);
1804 }
1805 // method parameter
1806 case METHOD_FORMAL_PARAMETER: {
1807 final int parameter_index = nextByte();
1808 return TypeAnnotationPosition.methodParameter(readTypePath(),
1809 parameter_index);
1810 }
1811 // type cast
1812 case CAST: {
1813 final int offset = nextChar();
1814 final int type_index = nextByte();
1815 final TypeAnnotationPosition position =
1816 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1817 position.offset = offset;
1818 return position;
1819 }
1820 // method/constructor/reference type argument
1821 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1822 final int offset = nextChar();
1823 final int type_index = nextByte();
1824 final TypeAnnotationPosition position = TypeAnnotationPosition
1825 .constructorInvocationTypeArg(readTypePath(), type_index);
1826 position.offset = offset;
1827 return position;
1828 }
1829 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1830 final int offset = nextChar();
1831 final int type_index = nextByte();
1832 final TypeAnnotationPosition position = TypeAnnotationPosition
1833 .methodInvocationTypeArg(readTypePath(), type_index);
1834 position.offset = offset;
1835 return position;
1836 }
1837 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1838 final int offset = nextChar();
1839 final int type_index = nextByte();
1840 final TypeAnnotationPosition position = TypeAnnotationPosition
1841 .constructorRefTypeArg(readTypePath(), type_index);
1842 position.offset = offset;
1843 return position;
1844 }
1845 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1846 final int offset = nextChar();
1847 final int type_index = nextByte();
1848 final TypeAnnotationPosition position = TypeAnnotationPosition
1849 .methodRefTypeArg(readTypePath(), type_index);
1850 position.offset = offset;
1851 return position;
1852 }
1853 // We don't need to worry about these
1854 case METHOD_RETURN:
1855 return TypeAnnotationPosition.methodReturn(readTypePath());
1856 case FIELD:
1857 return TypeAnnotationPosition.field(readTypePath());
1858 case UNKNOWN:
1859 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1860 default:
1861 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1862 }
1863 }
1864
1865 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1866 int len = nextByte();
1867 ListBuffer<Integer> loc = new ListBuffer<>();
1868 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1869 loc = loc.append(nextByte());
1870
1871 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1872
1873 }
1874
1875 /**
1876 * Helper function to read an optional pool entry (with given function); this is used while parsing
1877 * InnerClasses and EnclosingMethod attributes, as well as when parsing supertype descriptor,
1878 * as per JVMS.
1879 */
1880 <Z> Z optPoolEntry(int index, IntFunction<Z> poolFunc, Z defaultValue) {
1881 return (index == 0) ?
1882 defaultValue :
1883 poolFunc.apply(index);
1884 }
1885
1886 Attribute readAttributeValue() {
1887 char c;
1888 try {
1889 c = (char)buf.getByte(bp++);
1890 } catch (UnderflowException e) {
1891 throw badClassFile(Fragments.BadClassTruncatedAtOffset(e.getLength()));
1892 }
1893 switch (c) {
1894 case 'B':
1895 return new Attribute.Constant(syms.byteType, poolReader.getConstant(nextChar()));
1896 case 'C':
1897 return new Attribute.Constant(syms.charType, poolReader.getConstant(nextChar()));
1898 case 'D':
1899 return new Attribute.Constant(syms.doubleType, poolReader.getConstant(nextChar()));
1900 case 'F':
1901 return new Attribute.Constant(syms.floatType, poolReader.getConstant(nextChar()));
1902 case 'I':
1903 return new Attribute.Constant(syms.intType, poolReader.getConstant(nextChar()));
1904 case 'J':
1905 return new Attribute.Constant(syms.longType, poolReader.getConstant(nextChar()));
1906 case 'S':
1907 return new Attribute.Constant(syms.shortType, poolReader.getConstant(nextChar()));
1908 case 'Z':
1909 return new Attribute.Constant(syms.booleanType, poolReader.getConstant(nextChar()));
1910 case 's':
1911 return new Attribute.Constant(syms.stringType, poolReader.getName(nextChar()).toString());
1912 case 'e':
1913 return new EnumAttributeProxy(readTypeToProxy(nextChar()), poolReader.getName(nextChar()));
1914 case 'c':
1915 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1916 case '[': {
1917 int n = nextChar();
1918 ListBuffer<Attribute> l = new ListBuffer<>();
1919 for (int i=0; i<n; i++)
1920 l.append(readAttributeValue());
1921 return new ArrayAttributeProxy(l.toList());
1922 }
1923 case '@':
1924 return readCompoundAnnotation();
1925 default:
1926 throw new AssertionError("unknown annotation tag '" + c + "'");
1927 }
1928 }
1929
1930 interface ProxyVisitor extends Attribute.Visitor {
1931 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1932 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1933 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1934 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1935 }
1936
1937 static class EnumAttributeProxy extends Attribute {
1938 Type enumType;
1939 Name enumerator;
1940 public EnumAttributeProxy(Type enumType, Name enumerator) {
1941 super(null);
1942 this.enumType = enumType;
1943 this.enumerator = enumerator;
1944 }
1945 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1946 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1947 public String toString() {
1948 return "/*proxy enum*/" + enumType + "." + enumerator;
1949 }
1950 }
1951
1952 static class ClassAttributeProxy extends Attribute {
1953 Type classType;
1954 public ClassAttributeProxy(Type classType) {
1955 super(null);
1956 this.classType = classType;
1957 }
1958 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1959 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1960 public String toString() {
1961 return "/*proxy class*/" + classType + ".class";
1962 }
1963 }
1964
1965 static class ArrayAttributeProxy extends Attribute {
1966 List<Attribute> values;
1967 ArrayAttributeProxy(List<Attribute> values) {
1968 super(null);
1969 this.values = values;
1970 }
1971 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1972 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1973 public String toString() {
1974 return "{" + values + "}";
1975 }
1976 }
1977
1978 /** A temporary proxy representing a compound attribute.
1979 */
1980 static class CompoundAnnotationProxy extends Attribute {
1981 final List<Pair<Name,Attribute>> values;
1982 public CompoundAnnotationProxy(Type type,
1983 List<Pair<Name,Attribute>> values) {
1984 super(type);
1985 this.values = values;
1986 }
1987 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1988 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1989 public String toString() {
1990 StringBuilder buf = new StringBuilder();
1991 buf.append("@");
1992 buf.append(type.tsym.getQualifiedName());
1993 buf.append("/*proxy*/{");
1994 boolean first = true;
1995 for (List<Pair<Name,Attribute>> v = values;
1996 v.nonEmpty(); v = v.tail) {
1997 Pair<Name,Attribute> value = v.head;
1998 if (!first) buf.append(",");
1999 first = false;
2000 buf.append(value.fst);
2001 buf.append("=");
2002 buf.append(value.snd);
2003 }
2004 buf.append("}");
2005 return buf.toString();
2006 }
2007 }
2008
2009 /** A temporary proxy representing a type annotation.
2010 */
2011 static class TypeAnnotationProxy {
2012 final CompoundAnnotationProxy compound;
2013 final TypeAnnotationPosition position;
2014 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2015 TypeAnnotationPosition position) {
2016 this.compound = compound;
2017 this.position = position;
2018 }
2019 }
2020
2021 class AnnotationDeproxy implements ProxyVisitor {
2022 private ClassSymbol requestingOwner;
2023
2024 AnnotationDeproxy(ClassSymbol owner) {
2025 this.requestingOwner = owner;
2026 }
2027
2028 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2029 // also must fill in types!!!!
2030 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2031 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2032 buf.append(deproxyCompound(l.head));
2033 }
2034 return buf.toList();
2035 }
2036
2037 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2038 Type annotationType = resolvePossibleProxyType(a.type);
2039 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2040 for (List<Pair<Name,Attribute>> l = a.values;
2041 l.nonEmpty();
2042 l = l.tail) {
2043 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2044 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2045 }
2046 return new Attribute.Compound(annotationType, buf.toList());
2047 }
2048
2049 MethodSymbol findAccessMethod(Type container, Name name) {
2050 CompletionFailure failure = null;
2051 try {
2052 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2053 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2054 return (MethodSymbol) sym;
2055 }
2056 } catch (CompletionFailure ex) {
2057 failure = ex;
2058 }
2059 // The method wasn't found: emit a warning and recover
2060 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2061 try {
2062 if (lintClassfile) {
2063 if (failure == null) {
2064 log.warning(Warnings.AnnotationMethodNotFound(container, name));
2065 } else {
2066 log.warning(Warnings.AnnotationMethodNotFoundReason(container,
2067 name,
2068 failure.getDetailValue()));//diagnostic, if present
2069 }
2070 }
2071 } finally {
2072 log.useSource(prevSource);
2073 }
2074 // Construct a new method type and symbol. Use bottom
2075 // type (typeof null) as return type because this type is
2076 // a subtype of all reference types and can be converted
2077 // to primitive types by unboxing.
2078 MethodType mt = new MethodType(List.nil(),
2079 syms.botType,
2080 List.nil(),
2081 syms.methodClass);
2082 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2083 }
2084
2085 Attribute result;
2086 Type type;
2087 Attribute deproxy(Type t, Attribute a) {
2088 Type oldType = type;
2089 try {
2090 type = t;
2091 a.accept(this);
2092 return result;
2093 } finally {
2094 type = oldType;
2095 }
2096 }
2097
2098 // implement Attribute.Visitor below
2099
2100 public void visitConstant(Attribute.Constant value) {
2101 // assert value.type == type;
2102 result = value;
2103 }
2104
2105 public void visitClass(Attribute.Class clazz) {
2106 result = clazz;
2107 }
2108
2109 public void visitEnum(Attribute.Enum e) {
2110 throw new AssertionError(); // shouldn't happen
2111 }
2112
2113 public void visitCompound(Attribute.Compound compound) {
2114 throw new AssertionError(); // shouldn't happen
2115 }
2116
2117 public void visitArray(Attribute.Array array) {
2118 throw new AssertionError(); // shouldn't happen
2119 }
2120
2121 public void visitError(Attribute.Error e) {
2122 throw new AssertionError(); // shouldn't happen
2123 }
2124
2125 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2126 // type.tsym.flatName() should == proxy.enumFlatName
2127 Type enumType = resolvePossibleProxyType(proxy.enumType);
2128 TypeSymbol enumTypeSym = enumType.tsym;
2129 VarSymbol enumerator = null;
2130 CompletionFailure failure = null;
2131 try {
2132 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2133 if (sym.kind == VAR) {
2134 enumerator = (VarSymbol)sym;
2135 break;
2136 }
2137 }
2138 }
2139 catch (CompletionFailure ex) {
2140 failure = ex;
2141 }
2142 if (enumerator == null) {
2143 if (failure != null) {
2144 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile,
2145 enumTypeSym,
2146 proxy.enumerator,
2147 failure.getDiagnostic()));
2148 } else {
2149 log.warning(Warnings.UnknownEnumConstant(currentClassFile,
2150 enumTypeSym,
2151 proxy.enumerator));
2152 }
2153 result = new Attribute.Enum(enumTypeSym.type,
2154 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2155 } else {
2156 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2157 }
2158 }
2159
2160 @Override
2161 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2162 Type classType = resolvePossibleProxyType(proxy.classType);
2163 result = new Attribute.Class(types, classType);
2164 }
2165
2166 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2167 int length = proxy.values.length();
2168 Attribute[] ats = new Attribute[length];
2169 Type elemtype = types.elemtype(type);
2170 int i = 0;
2171 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2172 ats[i++] = deproxy(elemtype, p.head);
2173 }
2174 result = new Attribute.Array(type, ats);
2175 }
2176
2177 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2178 result = deproxyCompound(proxy);
2179 }
2180
2181 Type resolvePossibleProxyType(Type t) {
2182 if (t instanceof ProxyType proxyType) {
2183 Assert.check(requestingOwner.owner.kind == MDL);
2184 ModuleSymbol prevCurrentModule = currentModule;
2185 currentModule = (ModuleSymbol) requestingOwner.owner;
2186 try {
2187 return proxyType.resolve();
2188 } finally {
2189 currentModule = prevCurrentModule;
2190 }
2191 } else {
2192 return t;
2193 }
2194 }
2195 }
2196
2197 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2198 final MethodSymbol sym;
2199 final Attribute value;
2200 final JavaFileObject classFile = currentClassFile;
2201
2202 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2203 super(currentOwner.kind == MTH
2204 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2205 this.sym = sym;
2206 this.value = value;
2207 }
2208
2209 @Override
2210 public void run() {
2211 JavaFileObject previousClassFile = currentClassFile;
2212 try {
2213 // Reset the interim value set earlier in
2214 // attachAnnotationDefault().
2215 sym.defaultValue = null;
2216 currentClassFile = classFile;
2217 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2218 } finally {
2219 currentClassFile = previousClassFile;
2220 }
2221 }
2222
2223 @Override
2224 public String toString() {
2225 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2226 }
2227 }
2228
2229 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2230 final Symbol sym;
2231 final List<CompoundAnnotationProxy> l;
2232 final JavaFileObject classFile;
2233
2234 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2235 super(currentOwner.kind == MTH
2236 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2237 if (sym.kind == TYP && sym.owner.kind == MDL) {
2238 this.sym = sym.owner;
2239 } else {
2240 this.sym = sym;
2241 }
2242 this.l = l;
2243 this.classFile = currentClassFile;
2244 }
2245
2246 @Override
2247 public void run() {
2248 JavaFileObject previousClassFile = currentClassFile;
2249 try {
2250 currentClassFile = classFile;
2251 List<Attribute.Compound> newList = deproxyCompoundList(l);
2252 for (Attribute.Compound attr : newList) {
2253 if (attr.type.tsym == syms.deprecatedType.tsym) {
2254 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2255 Attribute forRemoval = attr.member(names.forRemoval);
2256 if (forRemoval instanceof Attribute.Constant constant) {
2257 if (constant.type == syms.booleanType && ((Integer) constant.value) != 0) {
2258 sym.flags_field |= DEPRECATED_REMOVAL;
2259 }
2260 }
2261 }
2262 }
2263 if (sym.annotationsPendingCompletion()) {
2264 sym.setDeclarationAttributes(newList);
2265 } else {
2266 sym.appendAttributes(newList);
2267 }
2268 } finally {
2269 currentClassFile = previousClassFile;
2270 }
2271 }
2272
2273 @Override
2274 public String toString() {
2275 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2276 }
2277 }
2278
2279 class TypeAnnotationCompleter extends AnnotationCompleter {
2280
2281 List<TypeAnnotationProxy> proxies;
2282
2283 TypeAnnotationCompleter(Symbol sym,
2284 List<TypeAnnotationProxy> proxies) {
2285 super(sym, List.nil());
2286 this.proxies = proxies;
2287 }
2288
2289 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2290 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2291 for (TypeAnnotationProxy proxy: proxies) {
2292 Attribute.Compound compound = deproxyCompound(proxy.compound);
2293 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2294 buf.add(typeCompound);
2295 }
2296 return buf.toList();
2297 }
2298
2299 @Override
2300 public void run() {
2301 JavaFileObject previousClassFile = currentClassFile;
2302 try {
2303 currentClassFile = classFile;
2304 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2305 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2306 } finally {
2307 currentClassFile = previousClassFile;
2308 }
2309 }
2310 }
2311
2312
2313 /************************************************************************
2314 * Reading Symbols
2315 ***********************************************************************/
2316
2317 /** Read a field.
2318 */
2319 VarSymbol readField() {
2320 char rawFlags = nextChar();
2321 long flags = adjustFieldFlags(rawFlags);
2322 Name name = poolReader.getName(nextChar());
2323 Type type = poolReader.getType(nextChar());
2324 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2325 readMemberAttrs(v);
2326 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1 ||
2327 Integer.bitCount(rawFlags & (FINAL | VOLATILE)) > 1)
2328 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "field", v);
2329 return v;
2330 }
2331
2332 /** Read a method.
2333 */
2334 MethodSymbol readMethod() {
2335 char rawFlags = nextChar();
2336 long flags = adjustMethodFlags(rawFlags);
2337 Name name = poolReader.getName(nextChar());
2338 Type type = poolReader.getType(nextChar());
2339 if (currentOwner.isInterface() &&
2340 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2341 if (majorVersion > Version.V52.major ||
2342 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2343 if ((flags & (STATIC | PRIVATE)) == 0) {
2344 currentOwner.flags_field |= DEFAULT;
2345 flags |= DEFAULT | ABSTRACT;
2346 }
2347 } else {
2348 //protect against ill-formed classfiles
2349 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2350 Integer.toString(majorVersion),
2351 Integer.toString(minorVersion));
2352 }
2353 }
2354 if (names.isInitOrVNew(name) && ((flags & STATIC) != 0)) {
2355 flags &= ~STATIC;
2356 type = new MethodType(type.getParameterTypes(),
2357 syms.voidType,
2358 type.getThrownTypes(),
2359 syms.methodClass);
2360 }
2361 validateMethodType(name, type);
2362 if (names.isInitOrVNew(name) && currentOwner.hasOuterInstance()) {
2363 // Sometimes anonymous classes don't have an outer
2364 // instance, however, there is no reliable way to tell so
2365 // we never strip this$n
2366 // ditto for local classes. Local classes that have an enclosing method set
2367 // won't pass the "hasOuterInstance" check above, but those that don't have an
2368 // enclosing method (i.e. from initializers) will pass that check.
2369 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2370 if (!currentOwner.name.isEmpty() && !local)
2371 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2372 type.getReturnType(),
2373 type.getThrownTypes(),
2374 syms.methodClass);
2375 }
2376 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2377 if (types.isSignaturePolymorphic(m)) {
2378 m.flags_field |= SIGNATURE_POLYMORPHIC;
2379 }
2380 if (saveParameterNames)
2381 initParameterNames(m);
2382 Symbol prevOwner = currentOwner;
2383 currentOwner = m;
2384 try {
2385 readMemberAttrs(m);
2386 } finally {
2387 currentOwner = prevOwner;
2388 }
2389 validateMethodType(name, m.type);
2390 setParameters(m, type);
2391
2392 if (Integer.bitCount(rawFlags & (PUBLIC | PRIVATE | PROTECTED)) > 1)
2393 throw badClassFile("illegal.flag.combo", Flags.toString((long)rawFlags), "method", m);
2394 if ((flags & VARARGS) != 0) {
2395 final Type last = type.getParameterTypes().last();
2396 if (last == null || !last.hasTag(ARRAY)) {
2397 m.flags_field &= ~VARARGS;
2398 throw badClassFile("malformed.vararg.method", m);
2399 }
2400 }
2401
2402 return m;
2403 }
2404
2405 void validateMethodType(Name name, Type t) {
2406 if ((!t.hasTag(TypeTag.METHOD) && !t.hasTag(TypeTag.FORALL)) ||
2407 ((name == names.init || name == names.vnew) && !t.getReturnType().hasTag(TypeTag.VOID))) {
2408 throw badClassFile("method.descriptor.invalid", name);
2409 }
2410 }
2411
2412 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2413 if (args.isEmpty()) {
2414 return args;
2415 }
2416 boolean isVarargs = (flags & VARARGS) != 0;
2417 if (isVarargs) {
2418 Type varargsElem = args.last();
2419 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2420 for (Type t : args) {
2421 adjustedArgs.append(t != varargsElem ?
2422 t :
2423 ((ArrayType)t).makeVarargs());
2424 }
2425 args = adjustedArgs.toList();
2426 }
2427 return args.tail;
2428 }
2429
2430 /**
2431 * Init the parameter names array.
2432 * Parameter names are currently inferred from the names in the
2433 * LocalVariableTable attributes of a Code attribute.
2434 * (Note: this means parameter names are currently not available for
2435 * methods without a Code attribute.)
2436 * This method initializes an array in which to store the name indexes
2437 * of parameter names found in LocalVariableTable attributes. It is
2438 * slightly supersized to allow for additional slots with a start_pc of 0.
2439 */
2440 void initParameterNames(MethodSymbol sym) {
2441 // make allowance for synthetic parameters.
2442 final int excessSlots = 4;
2443 int expectedParameterSlots =
2444 Code.width(sym.type.getParameterTypes()) + excessSlots;
2445 if (parameterNameIndicesLvt == null
2446 || parameterNameIndicesLvt.length < expectedParameterSlots) {
2447 parameterNameIndicesLvt = new int[expectedParameterSlots];
2448 } else
2449 Arrays.fill(parameterNameIndicesLvt, 0);
2450 }
2451
2452 /**
2453 * Set the parameters for a method symbol, including any names and
2454 * annotations that were read.
2455 *
2456 * <p>The type of the symbol may have changed while reading the
2457 * method attributes (see the Signature attribute). This may be
2458 * because of generic information or because anonymous synthetic
2459 * parameters were added. The original type (as read from the
2460 * method descriptor) is used to help guess the existence of
2461 * anonymous synthetic parameters.
2462 */
2463 void setParameters(MethodSymbol sym, Type jvmType) {
2464 int firstParamLvt = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2465 // the code in readMethod may have skipped the first
2466 // parameter when setting up the MethodType. If so, we
2467 // make a corresponding allowance here for the position of
2468 // the first parameter. Note that this assumes the
2469 // skipped parameter has a width of 1 -- i.e. it is not
2470 // a double width type (long or double.)
2471 if (names.isInitOrVNew(sym.name) && currentOwner.hasOuterInstance()) {
2472 // Sometimes anonymous classes don't have an outer
2473 // instance, however, there is no reliable way to tell so
2474 // we never strip this$n
2475 if (!currentOwner.name.isEmpty())
2476 firstParamLvt += 1;
2477 }
2478
2479 if (sym.type != jvmType) {
2480 // reading the method attributes has caused the
2481 // symbol's type to be changed. (i.e. the Signature
2482 // attribute.) This may happen if there are hidden
2483 // (synthetic) parameters in the descriptor, but not
2484 // in the Signature. The position of these hidden
2485 // parameters is unspecified; for now, assume they are
2486 // at the beginning, and so skip over them. The
2487 // primary case for this is two hidden parameters
2488 // passed into Enum constructors.
2489 int skip = Code.width(jvmType.getParameterTypes())
2490 - Code.width(sym.type.getParameterTypes());
2491 firstParamLvt += skip;
2492 }
2493 Set<Name> paramNames = new HashSet<>();
2494 ListBuffer<VarSymbol> params = new ListBuffer<>();
2495 // we maintain two index pointers, one for the LocalVariableTable attribute
2496 // and the other for the MethodParameters attribute.
2497 // This is needed as the MethodParameters attribute may contain
2498 // name_index = 0 in which case we want to fall back to the LocalVariableTable.
2499 // In such case, we still want to read the flags from the MethodParameters with that index.
2500 int nameIndexLvt = firstParamLvt;
2501 int nameIndexMp = 0;
2502 int annotationIndex = 0;
2503 for (Type t: sym.type.getParameterTypes()) {
2504 VarSymbol param = parameter(nameIndexMp, nameIndexLvt, t, sym, paramNames);
2505 params.append(param);
2506 if (parameterAnnotations != null) {
2507 ParameterAnnotations annotations = parameterAnnotations[annotationIndex];
2508 if (annotations != null && annotations.proxies != null
2509 && !annotations.proxies.isEmpty()) {
2510 annotate.normal(new AnnotationCompleter(param, annotations.proxies));
2511 }
2512 }
2513 nameIndexLvt += Code.width(t);
2514 nameIndexMp++;
2515 annotationIndex++;
2516 }
2517 if (parameterAnnotations != null && parameterAnnotations.length != annotationIndex) {
2518 throw badClassFile("bad.runtime.invisible.param.annotations", sym);
2519 }
2520 Assert.checkNull(sym.params);
2521 sym.params = params.toList();
2522 parameterAnnotations = null;
2523 parameterNameIndicesLvt = null;
2524 parameterNameIndicesMp = null;
2525 parameterAccessFlags = null;
2526 }
2527
2528 /**
2529 * Creates the parameter at the position {@code mpIndex} in the parameter list of the owning method.
2530 * Flags are optionally read from the MethodParameters attribute.
2531 * Names are optionally read from the MethodParameters attribute. If the constant pool index
2532 * of the name is 0, then the name is optionally read from the LocalVariableTable attribute.
2533 * @param mpIndex the index of the parameter in the MethodParameters attribute
2534 * @param lvtIndex the index of the parameter in the LocalVariableTable attribute
2535 */
2536 private VarSymbol parameter(int mpIndex, int lvtIndex, Type t, MethodSymbol owner, Set<Name> exclude) {
2537 long flags = PARAMETER;
2538 Name argName;
2539 if (parameterAccessFlags != null && mpIndex < parameterAccessFlags.length
2540 && parameterAccessFlags[mpIndex] != 0) {
2541 flags |= parameterAccessFlags[mpIndex];
2542 }
2543 if (parameterNameIndicesMp != null
2544 // if name_index is 0, then we might still get a name from the LocalVariableTable
2545 && parameterNameIndicesMp[mpIndex] != 0) {
2546 argName = optPoolEntry(parameterNameIndicesMp[mpIndex], poolReader::getName, names.empty);
2547 flags |= NAME_FILLED;
2548 } else if (parameterNameIndicesLvt != null && lvtIndex < parameterNameIndicesLvt.length
2549 && parameterNameIndicesLvt[lvtIndex] != 0) {
2550 argName = optPoolEntry(parameterNameIndicesLvt[lvtIndex], poolReader::getName, names.empty);
2551 flags |= NAME_FILLED;
2552 } else {
2553 String prefix = "arg";
2554 while (true) {
2555 argName = names.fromString(prefix + exclude.size());
2556 if (!exclude.contains(argName))
2557 break;
2558 prefix += "$";
2559 }
2560 }
2561 exclude.add(argName);
2562 return new ParamSymbol(flags, argName, t, owner);
2563 }
2564
2565 /**
2566 * skip n bytes
2567 */
2568 void skipBytes(int n) {
2569 bp = bp + n;
2570 }
2571
2572 /** Skip a field or method
2573 */
2574 void skipMember() {
2575 bp = bp + 6;
2576 char ac = nextChar();
2577 for (int i = 0; i < ac; i++) {
2578 bp = bp + 2;
2579 int attrLen = nextInt();
2580 bp = bp + attrLen;
2581 }
2582 }
2583
2584 void skipInnerClasses() {
2585 int n = nextChar();
2586 for (int i = 0; i < n; i++) {
2587 nextChar();
2588 nextChar();
2589 nextChar();
2590 nextChar();
2591 }
2592 }
2593
2594 /** Enter type variables of this classtype and all enclosing ones in
2595 * `typevars'.
2596 */
2597 protected void enterTypevars(Symbol sym, Type t) {
2598 if (t.getEnclosingType() != null) {
2599 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
2600 enterTypevars(sym.owner, t.getEnclosingType());
2601 }
2602 } else if (sym.kind == MTH && !sym.isStatic()) {
2603 enterTypevars(sym.owner, sym.owner.type);
2604 }
2605 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
2606 typevars.enter(xs.head.tsym);
2607 }
2608 }
2609
2610 protected ClassSymbol enterClass(Name name) {
2611 return syms.enterClass(currentModule, name);
2612 }
2613
2614 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
2615 return syms.enterClass(currentModule, name, owner);
2616 }
2617
2618 /** Read contents of a given class symbol `c'. Both external and internal
2619 * versions of an inner class are read.
2620 */
2621 void readClass(ClassSymbol c) {
2622 ClassType ct = (ClassType)c.type;
2623
2624 // allocate scope for members
2625 c.members_field = WriteableScope.create(c);
2626
2627 // prepare type variable table
2628 typevars = typevars.dup(currentOwner);
2629 if (ct.getEnclosingType().hasTag(CLASS))
2630 enterTypevars(c.owner, ct.getEnclosingType());
2631
2632 // read flags, or skip if this is an inner class
2633 long f = nextChar();
2634 long flags = adjustClassFlags(f);
2635 if (c == syms.objectType.tsym) {
2636 flags &= ~IDENTITY_TYPE; // jlO lacks identity even while being a concrete class.
2637 }
2638 if ((flags & PRIMITIVE_CLASS) != 0) {
2639 if (!allowPrimitiveClasses || (flags & (FINAL | PRIMITIVE_CLASS | IDENTITY_TYPE)) != (FINAL | PRIMITIVE_CLASS)) {
2640 throw badClassFile("bad.access.flags", Flags.toString(flags));
2641 }
2642 }
2643 if ((flags & MODULE) == 0) {
2644 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags;
2645 // read own class name and check that it matches
2646 currentModule = c.packge().modle;
2647 ClassSymbol self = poolReader.getClass(nextChar());
2648 if (c != self) {
2649 throw badClassFile("class.file.wrong.class",
2650 self.flatname);
2651 }
2652 } else {
2653 if (majorVersion < Version.V53.major) {
2654 throw badClassFile("anachronistic.module.info",
2655 Integer.toString(majorVersion),
2656 Integer.toString(minorVersion));
2657 }
2658 c.flags_field = flags;
2659 if (c.owner.kind != MDL) {
2660 throw badClassFile("module.info.definition.expected");
2661 }
2662 currentModule = (ModuleSymbol) c.owner;
2663 int this_class = nextChar();
2664 // temp, no check on this_class
2665 }
2666
2667 // class attributes must be read before class
2668 // skip ahead to read class attributes
2669 int startbp = bp;
2670 nextChar();
2671 char interfaceCount = nextChar();
2672 bp += interfaceCount * 2;
2673 char fieldCount = nextChar();
2674 for (int i = 0; i < fieldCount; i++) skipMember();
2675 char methodCount = nextChar();
2676 for (int i = 0; i < methodCount; i++) skipMember();
2677 readClassAttrs(c);
2678
2679 if (c.permitted != null && !c.permitted.isEmpty()) {
2680 c.flags_field |= SEALED;
2681 }
2682
2683 // reset and read rest of classinfo
2684 bp = startbp;
2685 int n = nextChar();
2686 if ((flags & MODULE) != 0 && n > 0) {
2687 throw badClassFile("module.info.invalid.super.class");
2688 }
2689 if (ct.supertype_field == null)
2690 ct.supertype_field =
2691 optPoolEntry(n, idx -> poolReader.getClass(idx).erasure(types), Type.noType);
2692 n = nextChar();
2693 List<Type> is = List.nil();
2694 for (int i = 0; i < n; i++) {
2695 Type _inter = poolReader.getClass(nextChar()).erasure(types);
2696 is = is.prepend(_inter);
2697 }
2698 if (ct.interfaces_field == null)
2699 ct.interfaces_field = is.reverse();
2700
2701 Assert.check(fieldCount == nextChar());
2702 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2703 Assert.check(methodCount == nextChar());
2704 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2705 if (c.isRecord()) {
2706 for (RecordComponent rc: c.getRecordComponents()) {
2707 rc.accessor = lookupMethod(c, rc.name, List.nil());
2708 }
2709 }
2710 typevars = typevars.leave();
2711 }
2712
2713 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) {
2714 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) {
2715 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) {
2716 return (MethodSymbol) s;
2717 }
2718 }
2719 return null;
2720 }
2721
2722 /** Read inner class info. For each inner/outer pair allocate a
2723 * member class.
2724 */
2725 void readInnerClasses(ClassSymbol c) {
2726 int n = nextChar();
2727 for (int i = 0; i < n; i++) {
2728 nextChar(); // skip inner class symbol
2729 int outerIdx = nextChar();
2730 int nameIdx = nextChar();
2731 ClassSymbol outer = optPoolEntry(outerIdx, poolReader::getClass, null);
2732 Name name = optPoolEntry(nameIdx, poolReader::getName, names.empty);
2733 if (name == null) name = names.empty;
2734 long flags = adjustClassFlags(nextChar());
2735 if (outer != null) { // we have a member class
2736 if (name == names.empty)
2737 name = names.one;
2738 ClassSymbol member = enterClass(name, outer);
2739 if ((flags & STATIC) == 0) {
2740 ((ClassType)member.type).setEnclosingType(outer.type);
2741 if (member.erasure_field != null)
2742 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2743 }
2744 if (c == outer && member.owner == c) {
2745 member.flags_field = flags;
2746 enterMember(c, member);
2747 }
2748 }
2749 }
2750 }
2751
2752 /** Read a class definition from the bytes in buf.
2753 */
2754 private void readClassBuffer(ClassSymbol c) throws IOException {
2755 int magic = nextInt();
2756 if (magic != JAVA_MAGIC)
2757 throw badClassFile("illegal.start.of.class.file");
2758
2759 minorVersion = nextChar();
2760 majorVersion = nextChar();
2761 int maxMajor = Version.MAX().major;
2762 int maxMinor = Version.MAX().minor;
2763 boolean previewClassFile =
2764 minorVersion == ClassFile.PREVIEW_MINOR_VERSION;
2765 if (majorVersion > maxMajor ||
2766 majorVersion * 1000 + minorVersion <
2767 Version.MIN().major * 1000 + Version.MIN().minor) {
2768 if (majorVersion == (maxMajor + 1) && !previewClassFile)
2769 log.warning(Warnings.BigMajorVersion(currentClassFile,
2770 majorVersion,
2771 maxMajor));
2772 else
2773 throw badClassFile("wrong.version",
2774 Integer.toString(majorVersion),
2775 Integer.toString(minorVersion),
2776 Integer.toString(maxMajor),
2777 Integer.toString(maxMinor));
2778 }
2779 utf8validation = majorVersion < V48.major ? Convert.Validation.PREJDK14 : Convert.Validation.STRICT;
2780
2781 if (previewClassFile) {
2782 if (!preview.isEnabled()) {
2783 log.error(preview.disabledError(currentClassFile, majorVersion));
2784 } else {
2785 preview.warnPreview(c.classfile, majorVersion);
2786 }
2787 }
2788
2789 poolReader = new PoolReader(this, names, syms);
2790 bp = poolReader.readPool(buf, bp);
2791 if (signatureBuffer.length < bp) {
2792 int ns = Integer.highestOneBit(bp) << 1;
2793 signatureBuffer = new byte[ns];
2794 }
2795 readClass(c);
2796 if (previewClassFile) {
2797 if ((c.flags_field & SYNTHETIC) != 0 &&
2798 c.owner.kind == PCK &&
2799 (c.flags_field & AUXILIARY) == 0 &&
2800 (c.flags_field & FINAL) != 0) {
2801 c.flags_field |= UNNAMED_CLASS;
2802 }
2803 }
2804 }
2805
2806 public void readClassFile(ClassSymbol c) {
2807 currentOwner = c;
2808 currentClassFile = c.classfile;
2809 warnedAttrs.clear();
2810 filling = true;
2811 target = null;
2812 repeatable = null;
2813 try {
2814 bp = 0;
2815 buf.reset();
2816 try (InputStream input = c.classfile.openInputStream()) {
2817 buf.appendStream(input);
2818 }
2819 readClassBuffer(c);
2820 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2821 List<Type> missing = missingTypeVariables;
2822 List<Type> found = foundTypeVariables;
2823 missingTypeVariables = List.nil();
2824 foundTypeVariables = List.nil();
2825 interimUses = List.nil();
2826 interimProvides = List.nil();
2827 filling = false;
2828 ClassType ct = (ClassType)currentOwner.type;
2829 ct.supertype_field =
2830 types.subst(ct.supertype_field, missing, found);
2831 ct.interfaces_field =
2832 types.subst(ct.interfaces_field, missing, found);
2833 ct.typarams_field =
2834 types.substBounds(ct.typarams_field, missing, found);
2835 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
2836 types.head.tsym.type = types.head;
2837 }
2838 } else if (missingTypeVariables.isEmpty() !=
2839 foundTypeVariables.isEmpty()) {
2840 Name name = missingTypeVariables.head.tsym.name;
2841 throw badClassFile("undecl.type.var", name);
2842 }
2843
2844 if ((c.flags_field & Flags.ANNOTATION) != 0) {
2845 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
2846 } else {
2847 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
2848 }
2849
2850 if (c == currentModule.module_info) {
2851 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
2852 Assert.check(currentModule.isCompleted());
2853 currentModule.usesProvidesCompleter =
2854 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
2855 } else {
2856 currentModule.uses = List.nil();
2857 currentModule.provides = List.nil();
2858 }
2859 }
2860 } catch (IOException | ClosedFileSystemException ex) {
2861 throw badClassFile("unable.to.access.file", ex.toString());
2862 } catch (ArrayIndexOutOfBoundsException ex) {
2863 throw badClassFile("bad.class.file", c.flatname);
2864 } finally {
2865 interimUses = List.nil();
2866 interimProvides = List.nil();
2867 missingTypeVariables = List.nil();
2868 foundTypeVariables = List.nil();
2869 filling = false;
2870 }
2871 }
2872
2873 /** We can only read a single class file at a time; this
2874 * flag keeps track of when we are currently reading a class
2875 * file.
2876 */
2877 public boolean filling = false;
2878
2879 /************************************************************************
2880 * Adjusting flags
2881 ***********************************************************************/
2882
2883 long adjustFieldFlags(long flags) {
2884 return flags;
2885 }
2886
2887 long adjustMethodFlags(long flags) {
2888 if ((flags & ACC_BRIDGE) != 0) {
2889 flags &= ~ACC_BRIDGE;
2890 flags |= BRIDGE;
2891 }
2892 if ((flags & ACC_VARARGS) != 0) {
2893 flags &= ~ACC_VARARGS;
2894 flags |= VARARGS;
2895 }
2896 return flags;
2897 }
2898
2899 long adjustClassFlags(long flags) {
2900 if ((flags & (ABSTRACT | INTERFACE | ACC_VALUE | ACC_MODULE)) == 0) {
2901 flags |= ACC_IDENTITY;
2902 }
2903 if ((flags & ACC_MODULE) != 0) {
2904 flags &= ~ACC_MODULE;
2905 flags |= MODULE;
2906 }
2907 if ((flags & ACC_PRIMITIVE) != 0) {
2908 flags &= ~ACC_PRIMITIVE;
2909 if (allowPrimitiveClasses) {
2910 flags |= PRIMITIVE_CLASS;
2911 }
2912 }
2913 if ((flags & ACC_VALUE) != 0) {
2914 flags &= ~ACC_VALUE;
2915 if (allowValueClasses) {
2916 flags |= VALUE_CLASS;
2917 }
2918 }
2919 if ((flags & ACC_IDENTITY) != 0) {
2920 flags &= ~ACC_IDENTITY;
2921 flags |= IDENTITY_TYPE;
2922 }
2923 return flags;
2924 }
2925
2926 /**
2927 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2928 * The attribute is only the last component of the original filename, so is unlikely
2929 * to be valid as is, so operations other than those to access the name throw
2930 * UnsupportedOperationException
2931 */
2932 private static class SourceFileObject implements JavaFileObject {
2933
2934 /** The file's name.
2935 */
2936 private final Name name;
2937
2938 public SourceFileObject(Name name) {
2939 this.name = name;
2940 }
2941
2942 @Override @DefinedBy(Api.COMPILER)
2943 public URI toUri() {
2944 try {
2945 return new URI(null, name.toString(), null);
2946 } catch (URISyntaxException e) {
2947 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
2948 }
2949 }
2950
2951 @Override @DefinedBy(Api.COMPILER)
2952 public String getName() {
2953 return name.toString();
2954 }
2955
2956 @Override @DefinedBy(Api.COMPILER)
2957 public JavaFileObject.Kind getKind() {
2958 return BaseFileManager.getKind(getName());
2959 }
2960
2961 @Override @DefinedBy(Api.COMPILER)
2962 public InputStream openInputStream() {
2963 throw new UnsupportedOperationException();
2964 }
2965
2966 @Override @DefinedBy(Api.COMPILER)
2967 public OutputStream openOutputStream() {
2968 throw new UnsupportedOperationException();
2969 }
2970
2971 @Override @DefinedBy(Api.COMPILER)
2972 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2973 throw new UnsupportedOperationException();
2974 }
2975
2976 @Override @DefinedBy(Api.COMPILER)
2977 public Reader openReader(boolean ignoreEncodingErrors) {
2978 throw new UnsupportedOperationException();
2979 }
2980
2981 @Override @DefinedBy(Api.COMPILER)
2982 public Writer openWriter() {
2983 throw new UnsupportedOperationException();
2984 }
2985
2986 @Override @DefinedBy(Api.COMPILER)
2987 public long getLastModified() {
2988 throw new UnsupportedOperationException();
2989 }
2990
2991 @Override @DefinedBy(Api.COMPILER)
2992 public boolean delete() {
2993 throw new UnsupportedOperationException();
2994 }
2995
2996 @Override @DefinedBy(Api.COMPILER)
2997 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2998 return true; // fail-safe mode
2999 }
3000
3001 @Override @DefinedBy(Api.COMPILER)
3002 public NestingKind getNestingKind() {
3003 return null;
3004 }
3005
3006 @Override @DefinedBy(Api.COMPILER)
3007 public Modifier getAccessLevel() {
3008 return null;
3009 }
3010
3011 /**
3012 * Check if two file objects are equal.
3013 * SourceFileObjects are just placeholder objects for the value of a
3014 * SourceFile attribute, and do not directly represent specific files.
3015 * Two SourceFileObjects are equal if their names are equal.
3016 */
3017 @Override
3018 public boolean equals(Object other) {
3019 if (this == other)
3020 return true;
3021 return (other instanceof SourceFileObject sourceFileObject)
3022 && name.equals(sourceFileObject.name);
3023 }
3024
3025 @Override
3026 public int hashCode() {
3027 return name.hashCode();
3028 }
3029 }
3030
3031 private class CompleterDeproxy implements AnnotationTypeCompleter {
3032 ClassSymbol proxyOn;
3033 CompoundAnnotationProxy target;
3034 CompoundAnnotationProxy repeatable;
3035
3036 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
3037 CompoundAnnotationProxy repeatable)
3038 {
3039 this.proxyOn = c;
3040 this.target = target;
3041 this.repeatable = repeatable;
3042 }
3043
3044 @Override
3045 public void complete(ClassSymbol sym) {
3046 Assert.check(proxyOn == sym);
3047 Attribute.Compound theTarget = null, theRepeatable = null;
3048 AnnotationDeproxy deproxy;
3049
3050 try {
3051 if (target != null) {
3052 deproxy = new AnnotationDeproxy(proxyOn);
3053 theTarget = deproxy.deproxyCompound(target);
3054 }
3055
3056 if (repeatable != null) {
3057 deproxy = new AnnotationDeproxy(proxyOn);
3058 theRepeatable = deproxy.deproxyCompound(repeatable);
3059 }
3060 } catch (Exception e) {
3061 throw new CompletionFailure(sym,
3062 () -> ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())),
3063 dcfh);
3064 }
3065
3066 sym.getAnnotationTypeMetadata().setTarget(theTarget);
3067 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
3068 }
3069 }
3070
3071 private class ProxyType extends Type {
3072
3073 private final Name name;
3074
3075 public ProxyType(int index) {
3076 super(syms.noSymbol, List.nil());
3077 this.name = poolReader.getName(index);
3078 }
3079
3080 @Override
3081 public TypeTag getTag() {
3082 return TypeTag.NONE;
3083 }
3084
3085 public Type resolve() {
3086 return name.map(ClassReader.this::sigToType);
3087 }
3088
3089 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3090 public String toString() {
3091 return "<ProxyType>";
3092 }
3093
3094 }
3095
3096 private static final class InterimUsesDirective {
3097 public final Name service;
3098
3099 public InterimUsesDirective(Name service) {
3100 this.service = service;
3101 }
3102
3103 }
3104
3105 private static final class InterimProvidesDirective {
3106 public final Name service;
3107 public final List<Name> impls;
3108
3109 public InterimProvidesDirective(Name service, List<Name> impls) {
3110 this.service = service;
3111 this.impls = impls;
3112 }
3113
3114 }
3115
3116 private final class UsesProvidesCompleter implements Completer {
3117 private final ModuleSymbol currentModule;
3118 private final List<InterimUsesDirective> interimUsesCopy;
3119 private final List<InterimProvidesDirective> interimProvidesCopy;
3120
3121 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3122 this.currentModule = currentModule;
3123 this.interimUsesCopy = interimUsesCopy;
3124 this.interimProvidesCopy = interimProvidesCopy;
3125 }
3126
3127 @Override
3128 public void complete(Symbol sym) throws CompletionFailure {
3129 ListBuffer<Directive> directives = new ListBuffer<>();
3130 directives.addAll(currentModule.directives);
3131 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3132 for (InterimUsesDirective interim : interimUsesCopy) {
3133 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3134 uses.add(d);
3135 directives.add(d);
3136 }
3137 currentModule.uses = uses.toList();
3138 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3139 for (InterimProvidesDirective interim : interimProvidesCopy) {
3140 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3141 for (Name impl : interim.impls) {
3142 impls.append(syms.enterClass(currentModule, impl));
3143 }
3144 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3145 impls.toList());
3146 provides.add(d);
3147 directives.add(d);
3148 }
3149 currentModule.provides = provides.toList();
3150 currentModule.directives = directives.toList();
3151 }
3152 }
3153 }