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