1 /*
2 * Copyright (c) 1999, 2018, 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
40 import javax.lang.model.element.Modifier;
41 import javax.lang.model.element.NestingKind;
42 import javax.tools.JavaFileManager;
43 import javax.tools.JavaFileObject;
44
45 import com.sun.tools.javac.code.Source.Feature;
46 import com.sun.tools.javac.comp.Annotate;
47 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
48 import com.sun.tools.javac.code.*;
49 import com.sun.tools.javac.code.Directive.*;
50 import com.sun.tools.javac.code.Lint.LintCategory;
51 import com.sun.tools.javac.code.Scope.WriteableScope;
52 import com.sun.tools.javac.code.Symbol.*;
53 import com.sun.tools.javac.code.Symtab;
54 import com.sun.tools.javac.code.Type.*;
55 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
56 import com.sun.tools.javac.file.BaseFileManager;
57 import com.sun.tools.javac.file.PathFileObject;
58 import com.sun.tools.javac.jvm.ClassFile.NameAndType;
59 import com.sun.tools.javac.jvm.ClassFile.Version;
60 import com.sun.tools.javac.main.Option;
61 import com.sun.tools.javac.resources.CompilerProperties.Fragments;
62 import com.sun.tools.javac.resources.CompilerProperties.Warnings;
63 import com.sun.tools.javac.util.*;
64 import com.sun.tools.javac.util.DefinedBy.Api;
65 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
66
67 import static com.sun.tools.javac.code.Flags.*;
68 import static com.sun.tools.javac.code.Kinds.Kind.*;
69
70 import com.sun.tools.javac.code.Scope.LookupKind;
71
72 import static com.sun.tools.javac.code.TypeTag.ARRAY;
73 import static com.sun.tools.javac.code.TypeTag.CLASS;
74 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
75 import static com.sun.tools.javac.jvm.ClassFile.*;
76 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
77
78 import static com.sun.tools.javac.main.Option.PARAMETERS;
79
80 /** This class provides operations to read a classfile into an internal
81 * representation. The internal representation is anchored in a
82 * ClassSymbol which contains in its scope symbol representations
83 * for all other definitions in the classfile. Top-level Classes themselves
84 * appear as members of the scopes of PackageSymbols.
85 *
86 * <p><b>This is NOT part of any supported API.
87 * If you write code that depends on this, you do so at your own risk.
88 * This code and its internal interfaces are subject to change or
89 * deletion without notice.</b>
90 */
91 public class ClassReader {
92 /** The context key for the class reader. */
93 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
94
95 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
96
97 private final Annotate annotate;
98
99 /** Switch: verbose output.
100 */
101 boolean verbose;
102
103 /** Switch: read constant pool and code sections. This switch is initially
104 * set to false but can be turned on from outside.
105 */
106 public boolean readAllOfClassFile = false;
107
108 /** Switch: allow modules.
109 */
110 boolean allowModules;
111
112 /** Lint option: warn about classfile issues
113 */
114 boolean lintClassfile;
115
116 /** Switch: preserve parameter names from the variable table.
117 */
118 public boolean saveParameterNames;
119
120 /**
121 * The currently selected profile.
122 */
123 public final Profile profile;
124
125 /** The log to use for verbose output
126 */
127 final Log log;
128
129 /** The symbol table. */
130 Symtab syms;
131
132 Types types;
133
134 /** The name table. */
135 final Names names;
136
137 /** Access to files
138 */
139 private final JavaFileManager fileManager;
140
141 /** Factory for diagnostics
142 */
143 JCDiagnostic.Factory diagFactory;
144
145 DeferredCompletionFailureHandler dcfh;
146
147 /**
148 * Support for preview language features.
149 */
150 Preview preview;
151
152 /** The current scope where type variables are entered.
153 */
154 protected WriteableScope typevars;
155
156 private List<InterimUsesDirective> interimUses = List.nil();
157 private List<InterimProvidesDirective> interimProvides = List.nil();
158
159 /** The path name of the class file currently being read.
160 */
161 protected JavaFileObject currentClassFile = null;
162
163 /** The class or method currently being read.
164 */
165 protected Symbol currentOwner = null;
166
167 /** The module containing the class currently being read.
168 */
169 protected ModuleSymbol currentModule = null;
170
171 /** The buffer containing the currently read class file.
172 */
173 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
174
175 /** The current input pointer.
176 */
177 protected int bp;
178
179 /** The objects of the constant pool.
180 */
181 Object[] poolObj;
182
183 /** For every constant pool entry, an index into buf where the
184 * defining section of the entry is found.
185 */
186 int[] poolIdx;
187
188 /** The major version number of the class file being read. */
189 int majorVersion;
190 /** The minor version number of the class file being read. */
191 int minorVersion;
192
193 /** A table to hold the constant pool indices for method parameter
194 * names, as given in LocalVariableTable attributes.
195 */
196 int[] parameterNameIndices;
197
198 /**
199 * A table to hold annotations for method parameters.
200 */
201 ParameterAnnotations[] parameterAnnotations;
202
203 /**
204 * A holder for parameter annotations.
205 */
206 static class ParameterAnnotations {
207 List<CompoundAnnotationProxy> proxies;
208
209 void add(List<CompoundAnnotationProxy> newAnnotations) {
210 if (proxies == null) {
211 proxies = newAnnotations;
212 } else {
213 proxies = proxies.prependList(newAnnotations);
214 }
215 }
216 }
217
218 /**
219 * Whether or not any parameter names have been found.
220 */
221 boolean haveParameterNameIndices;
222
223 /** Set this to false every time we start reading a method
224 * and are saving parameter names. Set it to true when we see
225 * MethodParameters, if it's set when we see a LocalVariableTable,
226 * then we ignore the parameter names from the LVT.
227 */
228 boolean sawMethodParameters;
229
230 /**
231 * The set of attribute names for which warnings have been generated for the current class
232 */
233 Set<Name> warnedAttrs = new HashSet<>();
234
235 /**
236 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
237 * @Target
238 */
239 CompoundAnnotationProxy target;
240
241 /**
242 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with
243 * @Repeatable
244 */
245 CompoundAnnotationProxy repeatable;
246
247 /** Get the ClassReader instance for this invocation. */
248 public static ClassReader instance(Context context) {
249 ClassReader instance = context.get(classReaderKey);
250 if (instance == null)
251 instance = new ClassReader(context);
252 return instance;
253 }
254
255 /** Construct a new class reader. */
256 protected ClassReader(Context context) {
257 context.put(classReaderKey, this);
258 annotate = Annotate.instance(context);
259 names = Names.instance(context);
260 syms = Symtab.instance(context);
261 types = Types.instance(context);
262 fileManager = context.get(JavaFileManager.class);
263 if (fileManager == null)
264 throw new AssertionError("FileManager initialization error");
265 diagFactory = JCDiagnostic.Factory.instance(context);
266 dcfh = DeferredCompletionFailureHandler.instance(context);
267
268 log = Log.instance(context);
269
270 Options options = Options.instance(context);
271 verbose = options.isSet(Option.VERBOSE);
272
273 Source source = Source.instance(context);
274 preview = Preview.instance(context);
275 allowModules = Feature.MODULES.allowedInSource(source);
276
277 saveParameterNames = options.isSet(PARAMETERS);
278
279 profile = Profile.instance(context);
280
281 typevars = WriteableScope.create(syms.noSymbol);
282
283 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
284
285 initAttributeReaders();
286 }
287
288 /** Add member to class unless it is synthetic.
289 */
290 private void enterMember(ClassSymbol c, Symbol sym) {
291 // Synthetic members are not entered -- reason lost to history (optimization?).
292 // Lambda methods must be entered because they may have inner classes (which reference them)
293 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
294 c.members_field.enter(sym);
295 }
296
297 /************************************************************************
298 * Error Diagnoses
299 ***********************************************************************/
300
301 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
302 return new ClassFinder.BadClassFile (
303 currentOwner.enclClass(),
304 currentClassFile,
305 diagFactory.fragment(key, args),
306 diagFactory,
307 dcfh);
308 }
309
310 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Symbol sym) {
311 return new ClassFinder.BadEnclosingMethodAttr (
312 currentOwner.enclClass(),
313 currentClassFile,
314 diagFactory.fragment(Fragments.BadEnclosingMethod(sym)),
315 diagFactory,
316 dcfh);
317 }
318
319 /************************************************************************
320 * Buffer Access
321 ***********************************************************************/
322
323 /** Read a character.
324 */
325 char nextChar() {
326 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
327 }
328
329 /** Read a byte.
330 */
331 int nextByte() {
332 return buf[bp++] & 0xFF;
333 }
334
335 /** Read an integer.
336 */
337 int nextInt() {
338 return
339 ((buf[bp++] & 0xFF) << 24) +
340 ((buf[bp++] & 0xFF) << 16) +
341 ((buf[bp++] & 0xFF) << 8) +
342 (buf[bp++] & 0xFF);
343 }
344
345 /** Extract a character at position bp from buf.
346 */
347 char getChar(int bp) {
348 return
349 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
350 }
351
352 /** Extract an integer at position bp from buf.
353 */
354 int getInt(int bp) {
355 return
356 ((buf[bp] & 0xFF) << 24) +
357 ((buf[bp+1] & 0xFF) << 16) +
358 ((buf[bp+2] & 0xFF) << 8) +
359 (buf[bp+3] & 0xFF);
360 }
361
362
363 /** Extract a long integer at position bp from buf.
364 */
365 long getLong(int bp) {
366 DataInputStream bufin =
367 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
368 try {
369 return bufin.readLong();
370 } catch (IOException e) {
371 throw new AssertionError(e);
372 }
373 }
374
375 /** Extract a float at position bp from buf.
376 */
377 float getFloat(int bp) {
378 DataInputStream bufin =
379 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
380 try {
381 return bufin.readFloat();
382 } catch (IOException e) {
383 throw new AssertionError(e);
384 }
385 }
386
387 /** Extract a double at position bp from buf.
388 */
389 double getDouble(int bp) {
390 DataInputStream bufin =
391 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
392 try {
393 return bufin.readDouble();
394 } catch (IOException e) {
395 throw new AssertionError(e);
396 }
397 }
398
399 /************************************************************************
400 * Constant Pool Access
401 ***********************************************************************/
402
403 /** Index all constant pool entries, writing their start addresses into
404 * poolIdx.
405 */
406 void indexPool() {
407 poolIdx = new int[nextChar()];
408 poolObj = new Object[poolIdx.length];
409 int i = 1;
410 while (i < poolIdx.length) {
411 poolIdx[i++] = bp;
412 byte tag = buf[bp++];
413 switch (tag) {
414 case CONSTANT_Utf8: case CONSTANT_Unicode: {
415 int len = nextChar();
416 bp = bp + len;
417 break;
418 }
419 case CONSTANT_Class:
420 case CONSTANT_String:
421 case CONSTANT_MethodType:
422 case CONSTANT_Module:
423 case CONSTANT_Package:
424 bp = bp + 2;
425 break;
426 case CONSTANT_MethodHandle:
427 bp = bp + 3;
428 break;
429 case CONSTANT_Fieldref:
430 case CONSTANT_Methodref:
431 case CONSTANT_InterfaceMethodref:
432 case CONSTANT_NameandType:
433 case CONSTANT_Integer:
434 case CONSTANT_Float:
435 case CONSTANT_Dynamic:
436 case CONSTANT_InvokeDynamic:
437 bp = bp + 4;
438 break;
439 case CONSTANT_Long:
440 case CONSTANT_Double:
441 bp = bp + 8;
442 i++;
443 break;
444 default:
445 throw badClassFile("bad.const.pool.tag.at",
446 Byte.toString(tag),
447 Integer.toString(bp -1));
448 }
449 }
450 }
451
452 /** Read constant pool entry at start address i, use pool as a cache.
453 */
454 Object readPool(int i) {
455 Object result = poolObj[i];
456 if (result != null) return result;
457
458 int index = poolIdx[i];
459 if (index == 0) return null;
460
461 byte tag = buf[index];
462 switch (tag) {
463 case CONSTANT_Utf8:
464 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
465 break;
466 case CONSTANT_Unicode:
467 throw badClassFile("unicode.str.not.supported");
468 case CONSTANT_Class:
469 poolObj[i] = readClassOrType(getChar(index + 1));
470 break;
471 case CONSTANT_String:
472 // FIXME: (footprint) do not use toString here
473 poolObj[i] = readName(getChar(index + 1)).toString();
474 break;
475 case CONSTANT_Fieldref: {
476 ClassSymbol owner = readClassSymbol(getChar(index + 1));
477 NameAndType nt = readNameAndType(getChar(index + 3));
478 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
479 break;
480 }
481 case CONSTANT_Methodref:
482 case CONSTANT_InterfaceMethodref: {
483 ClassSymbol owner = readClassSymbol(getChar(index + 1));
484 NameAndType nt = readNameAndType(getChar(index + 3));
485 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
486 break;
487 }
488 case CONSTANT_NameandType:
489 poolObj[i] = new NameAndType(
490 readName(getChar(index + 1)),
491 readType(getChar(index + 3)), types);
492 break;
493 case CONSTANT_Integer:
494 poolObj[i] = getInt(index + 1);
495 break;
496 case CONSTANT_Float:
497 poolObj[i] = Float.valueOf(getFloat(index + 1));
498 break;
499 case CONSTANT_Long:
500 poolObj[i] = Long.valueOf(getLong(index + 1));
501 break;
502 case CONSTANT_Double:
503 poolObj[i] = Double.valueOf(getDouble(index + 1));
504 break;
505 case CONSTANT_MethodHandle:
506 skipBytes(4);
507 break;
508 case CONSTANT_MethodType:
509 skipBytes(3);
510 break;
511 case CONSTANT_Dynamic:
512 case CONSTANT_InvokeDynamic:
513 skipBytes(5);
514 break;
515 case CONSTANT_Module:
516 case CONSTANT_Package:
517 // this is temporary for now: treat as a simple reference to the underlying Utf8.
518 poolObj[i] = readName(getChar(index + 1));
519 break;
520 default:
521 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
522 }
523 return poolObj[i];
524 }
525
526 /** Read signature and convert to type.
527 */
528 Type readType(int i) {
529 int index = poolIdx[i];
530 return sigToType(buf, index + 3, getChar(index + 1));
531 }
532
533 /** If name is an array type or class signature, return the
534 * corresponding type; otherwise return a ClassSymbol with given name.
535 */
536 Object readClassOrType(int i) {
537 int index = poolIdx[i];
538 int len = getChar(index + 1);
539 int start = index + 3;
540 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
541 // by the above assertion, the following test can be
542 // simplified to (buf[start] == '[')
543 return (buf[start] == '[' || buf[start + len - 1] == ';')
544 ? (Object)sigToType(buf, start, len)
545 : (Object)enterClass(names.fromUtf(internalize(buf, start,
546 len)));
547 }
548
549 /** Read signature and convert to type parameters.
550 */
551 List<Type> readTypeParams(int i) {
552 int index = poolIdx[i];
553 return sigToTypeParams(buf, index + 3, getChar(index + 1));
554 }
555
556 /** Read class entry.
557 */
558 ClassSymbol readClassSymbol(int i) {
559 Object obj = readPool(i);
560 if (obj != null && !(obj instanceof ClassSymbol))
561 throw badClassFile("bad.const.pool.entry",
562 currentClassFile.toString(),
563 "CONSTANT_Class_info", i);
564 return (ClassSymbol)obj;
565 }
566
567 Name readClassName(int i) {
568 int index = poolIdx[i];
569 if (index == 0) return null;
570 byte tag = buf[index];
571 if (tag != CONSTANT_Class) {
572 throw badClassFile("bad.const.pool.entry",
573 currentClassFile.toString(),
574 "CONSTANT_Class_info", i);
575 }
576 int nameIndex = poolIdx[getChar(index + 1)];
577 int len = getChar(nameIndex + 1);
578 int start = nameIndex + 3;
579 if (buf[start] == '[' || buf[start + len - 1] == ';')
580 throw badClassFile("wrong class name"); //TODO: proper diagnostics
581 return names.fromUtf(internalize(buf, start, len));
582 }
583
584 /** Read name.
585 */
586 Name readName(int i) {
587 Object obj = readPool(i);
588 if (obj != null && !(obj instanceof Name))
589 throw badClassFile("bad.const.pool.entry",
590 currentClassFile.toString(),
591 "CONSTANT_Utf8_info or CONSTANT_String_info", i);
592 return (Name)obj;
593 }
594
595 /** Read name and type.
596 */
597 NameAndType readNameAndType(int i) {
598 Object obj = readPool(i);
599 if (obj != null && !(obj instanceof NameAndType))
600 throw badClassFile("bad.const.pool.entry",
601 currentClassFile.toString(),
602 "CONSTANT_NameAndType_info", i);
603 return (NameAndType)obj;
604 }
605
606 /** Read the name of a module.
607 * The name is stored in a CONSTANT_Module entry, in
608 * JVMS 4.2 binary form (using ".", not "/")
609 */
610 Name readModuleName(int i) {
611 return readName(i);
612 }
613
614 /** Read module_flags.
615 */
616 Set<ModuleFlags> readModuleFlags(int flags) {
617 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
618 for (ModuleFlags f : ModuleFlags.values()) {
619 if ((flags & f.value) != 0)
620 set.add(f);
621 }
622 return set;
623 }
624
625 /** Read resolution_flags.
626 */
627 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
628 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
629 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
630 if ((flags & f.value) != 0)
631 set.add(f);
632 }
633 return set;
634 }
635
636 /** Read exports_flags.
637 */
638 Set<ExportsFlag> readExportsFlags(int flags) {
639 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
640 for (ExportsFlag f: ExportsFlag.values()) {
641 if ((flags & f.value) != 0)
642 set.add(f);
643 }
644 return set;
645 }
646
647 /** Read opens_flags.
648 */
649 Set<OpensFlag> readOpensFlags(int flags) {
650 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
651 for (OpensFlag f: OpensFlag.values()) {
652 if ((flags & f.value) != 0)
653 set.add(f);
654 }
655 return set;
656 }
657
658 /** Read requires_flags.
659 */
660 Set<RequiresFlag> readRequiresFlags(int flags) {
661 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
662 for (RequiresFlag f: RequiresFlag.values()) {
663 if ((flags & f.value) != 0)
664 set.add(f);
665 }
666 return set;
667 }
668
669 /************************************************************************
670 * Reading Types
671 ***********************************************************************/
672
673 /** The unread portion of the currently read type is
674 * signature[sigp..siglimit-1].
675 */
676 byte[] signature;
677 int sigp;
678 int siglimit;
679 boolean sigEnterPhase = false;
680
681 /** Convert signature to type, where signature is a byte array segment.
682 */
683 Type sigToType(byte[] sig, int offset, int len) {
684 signature = sig;
685 sigp = offset;
686 siglimit = offset + len;
687 return sigToType();
688 }
689
690 /** Convert signature to type, where signature is implicit.
691 */
692 Type sigToType() {
693 switch ((char) signature[sigp]) {
694 case 'T':
695 sigp++;
696 int start = sigp;
697 while (signature[sigp] != ';') sigp++;
698 sigp++;
699 return sigEnterPhase
700 ? Type.noType
701 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
702 case '+': {
703 sigp++;
704 Type t = sigToType();
705 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
706 }
707 case '*':
708 sigp++;
709 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
710 syms.boundClass);
711 case '-': {
712 sigp++;
713 Type t = sigToType();
714 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
715 }
716 case 'B':
717 sigp++;
718 return syms.byteType;
719 case 'C':
720 sigp++;
721 return syms.charType;
722 case 'D':
723 sigp++;
724 return syms.doubleType;
725 case 'F':
726 sigp++;
727 return syms.floatType;
728 case 'I':
729 sigp++;
730 return syms.intType;
731 case 'J':
732 sigp++;
733 return syms.longType;
734 case 'L':
735 {
736 // int oldsigp = sigp;
737 Type t = classSigToType();
738 if (sigp < siglimit && signature[sigp] == '.')
739 throw badClassFile("deprecated inner class signature syntax " +
740 "(please recompile from source)");
741 /*
742 System.err.println(" decoded " +
743 new String(signature, oldsigp, sigp-oldsigp) +
744 " => " + t + " outer " + t.outer());
745 */
746 return t;
747 }
748 case 'S':
749 sigp++;
750 return syms.shortType;
751 case 'V':
752 sigp++;
753 return syms.voidType;
754 case 'Z':
755 sigp++;
756 return syms.booleanType;
757 case '[':
758 sigp++;
759 return new ArrayType(sigToType(), syms.arrayClass);
760 case '(':
761 sigp++;
762 List<Type> argtypes = sigToTypes(')');
763 Type restype = sigToType();
764 List<Type> thrown = List.nil();
765 while (signature[sigp] == '^') {
766 sigp++;
767 thrown = thrown.prepend(sigToType());
768 }
769 // if there is a typevar in the throws clause we should state it.
770 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
771 if (l.head.hasTag(TYPEVAR)) {
772 l.head.tsym.flags_field |= THROWS;
773 }
774 }
775 return new MethodType(argtypes,
776 restype,
777 thrown.reverse(),
778 syms.methodClass);
779 case '<':
780 typevars = typevars.dup(currentOwner);
781 Type poly = new ForAll(sigToTypeParams(), sigToType());
782 typevars = typevars.leave();
783 return poly;
784 default:
785 throw badClassFile("bad.signature",
786 Convert.utf2string(signature, sigp, 10));
787 }
788 }
789
790 byte[] signatureBuffer = new byte[0];
791 int sbp = 0;
792 /** Convert class signature to type, where signature is implicit.
793 */
794 Type classSigToType() {
795 if (signature[sigp] != 'L')
796 throw badClassFile("bad.class.signature",
797 Convert.utf2string(signature, sigp, 10));
798 sigp++;
799 Type outer = Type.noType;
800 int startSbp = sbp;
801
802 while (true) {
803 final byte c = signature[sigp++];
804 switch (c) {
805
806 case ';': { // end
807 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
808 startSbp,
809 sbp - startSbp));
810
811 try {
812 return (outer == Type.noType) ?
813 t.erasure(types) :
814 new ClassType(outer, List.nil(), t);
815 } finally {
816 sbp = startSbp;
817 }
818 }
819
820 case '<': // generic arguments
821 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
822 startSbp,
823 sbp - startSbp));
824 outer = new ClassType(outer, sigToTypes('>'), t) {
825 boolean completed = false;
826 @Override @DefinedBy(Api.LANGUAGE_MODEL)
827 public Type getEnclosingType() {
828 if (!completed) {
829 completed = true;
830 tsym.complete();
831 Type enclosingType = tsym.type.getEnclosingType();
832 if (enclosingType != Type.noType) {
833 List<Type> typeArgs =
834 super.getEnclosingType().allparams();
835 List<Type> typeParams =
836 enclosingType.allparams();
837 if (typeParams.length() != typeArgs.length()) {
838 // no "rare" types
839 super.setEnclosingType(types.erasure(enclosingType));
840 } else {
841 super.setEnclosingType(types.subst(enclosingType,
842 typeParams,
843 typeArgs));
844 }
845 } else {
846 super.setEnclosingType(Type.noType);
847 }
848 }
849 return super.getEnclosingType();
850 }
851 @Override
852 public void setEnclosingType(Type outer) {
853 throw new UnsupportedOperationException();
854 }
855 };
856 switch (signature[sigp++]) {
857 case ';':
858 if (sigp < signature.length && signature[sigp] == '.') {
859 // support old-style GJC signatures
860 // The signature produced was
861 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
862 // rather than say
863 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
864 // so we skip past ".Lfoo/Outer$"
865 sigp += (sbp - startSbp) + // "foo/Outer"
866 3; // ".L" and "$"
867 signatureBuffer[sbp++] = (byte)'$';
868 break;
869 } else {
870 sbp = startSbp;
871 return outer;
872 }
873 case '.':
874 signatureBuffer[sbp++] = (byte)'$';
875 break;
876 default:
877 throw new AssertionError(signature[sigp-1]);
878 }
879 continue;
880
881 case '.':
882 //we have seen an enclosing non-generic class
883 if (outer != Type.noType) {
884 t = enterClass(names.fromUtf(signatureBuffer,
885 startSbp,
886 sbp - startSbp));
887 outer = new ClassType(outer, List.nil(), t);
888 }
889 signatureBuffer[sbp++] = (byte)'$';
890 continue;
891 case '/':
892 signatureBuffer[sbp++] = (byte)'.';
893 continue;
894 default:
895 signatureBuffer[sbp++] = c;
896 continue;
897 }
898 }
899 }
900
901 /** Convert (implicit) signature to list of types
902 * until `terminator' is encountered.
903 */
904 List<Type> sigToTypes(char terminator) {
905 List<Type> head = List.of(null);
906 List<Type> tail = head;
907 while (signature[sigp] != terminator)
908 tail = tail.setTail(List.of(sigToType()));
909 sigp++;
910 return head.tail;
911 }
912
913 /** Convert signature to type parameters, where signature is a byte
914 * array segment.
915 */
916 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
917 signature = sig;
918 sigp = offset;
919 siglimit = offset + len;
920 return sigToTypeParams();
921 }
922
923 /** Convert signature to type parameters, where signature is implicit.
924 */
925 List<Type> sigToTypeParams() {
926 List<Type> tvars = List.nil();
927 if (signature[sigp] == '<') {
928 sigp++;
929 int start = sigp;
930 sigEnterPhase = true;
931 while (signature[sigp] != '>')
932 tvars = tvars.prepend(sigToTypeParam());
933 sigEnterPhase = false;
934 sigp = start;
935 while (signature[sigp] != '>')
936 sigToTypeParam();
937 sigp++;
938 }
939 return tvars.reverse();
940 }
941
942 /** Convert (implicit) signature to type parameter.
943 */
944 Type sigToTypeParam() {
945 int start = sigp;
946 while (signature[sigp] != ':') sigp++;
947 Name name = names.fromUtf(signature, start, sigp - start);
948 TypeVar tvar;
949 if (sigEnterPhase) {
950 tvar = new TypeVar(name, currentOwner, syms.botType);
951 typevars.enter(tvar.tsym);
952 } else {
953 tvar = (TypeVar)findTypeVar(name);
954 }
955 List<Type> bounds = List.nil();
956 boolean allInterfaces = false;
957 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
958 sigp++;
959 allInterfaces = true;
960 }
961 while (signature[sigp] == ':') {
962 sigp++;
963 bounds = bounds.prepend(sigToType());
964 }
965 if (!sigEnterPhase) {
966 types.setBounds(tvar, bounds.reverse(), allInterfaces);
967 }
968 return tvar;
969 }
970
971 /** Find type variable with given name in `typevars' scope.
972 */
973 Type findTypeVar(Name name) {
974 Symbol s = typevars.findFirst(name);
975 if (s != null) {
976 return s.type;
977 } else {
978 if (readingClassAttr) {
979 // While reading the class attribute, the supertypes
980 // might refer to a type variable from an enclosing element
981 // (method or class).
982 // If the type variable is defined in the enclosing class,
983 // we can actually find it in
984 // currentOwner.owner.type.getTypeArguments()
985 // However, until we have read the enclosing method attribute
986 // we don't know for sure if this owner is correct. It could
987 // be a method and there is no way to tell before reading the
988 // enclosing method attribute.
989 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
990 missingTypeVariables = missingTypeVariables.prepend(t);
991 // System.err.println("Missing type var " + name);
992 return t;
993 }
994 throw badClassFile("undecl.type.var", name);
995 }
996 }
997
998 /************************************************************************
999 * Reading Attributes
1000 ***********************************************************************/
1001
1002 protected enum AttributeKind { CLASS, MEMBER }
1003
1004 protected abstract class AttributeReader {
1005 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
1006 this.name = name;
1007 this.version = version;
1008 this.kinds = kinds;
1009 }
1010
1011 protected boolean accepts(AttributeKind kind) {
1012 if (kinds.contains(kind)) {
1013 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
1014 return true;
1015
1016 if (lintClassfile && !warnedAttrs.contains(name)) {
1017 JavaFileObject prev = log.useSource(currentClassFile);
1018 try {
1019 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null,
1020 Warnings.FutureAttr(name, version.major, version.minor, majorVersion, minorVersion));
1021 } finally {
1022 log.useSource(prev);
1023 }
1024 warnedAttrs.add(name);
1025 }
1026 }
1027 return false;
1028 }
1029
1030 protected abstract void read(Symbol sym, int attrLen);
1031
1032 protected final Name name;
1033 protected final ClassFile.Version version;
1034 protected final Set<AttributeKind> kinds;
1035 }
1036
1037 protected Set<AttributeKind> CLASS_ATTRIBUTE =
1038 EnumSet.of(AttributeKind.CLASS);
1039 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
1040 EnumSet.of(AttributeKind.MEMBER);
1041 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
1042 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
1043
1044 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
1045
1046 private void initAttributeReaders() {
1047 AttributeReader[] readers = {
1048 // v45.3 attributes
1049
1050 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
1051 protected void read(Symbol sym, int attrLen) {
1052 if (readAllOfClassFile || saveParameterNames)
1053 ((MethodSymbol)sym).code = readCode(sym);
1054 else
1055 bp = bp + attrLen;
1056 }
1057 },
1058
1059 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
1060 protected void read(Symbol sym, int attrLen) {
1061 Object v = readPool(nextChar());
1062 // Ignore ConstantValue attribute if field not final.
1063 if ((sym.flags() & FINAL) == 0) {
1064 return;
1065 }
1066 VarSymbol var = (VarSymbol) sym;
1067 switch (var.type.getTag()) {
1068 case BOOLEAN:
1069 case BYTE:
1070 case CHAR:
1071 case SHORT:
1072 case INT:
1073 checkType(var, Integer.class, v);
1074 break;
1075 case LONG:
1076 checkType(var, Long.class, v);
1077 break;
1078 case FLOAT:
1079 checkType(var, Float.class, v);
1080 break;
1081 case DOUBLE:
1082 checkType(var, Double.class, v);
1083 break;
1084 case CLASS:
1085 Assert.check(var.type.tsym == syms.stringType.tsym);
1086 checkType(var, String.class, v);
1087 break;
1088 default:
1089 // ignore ConstantValue attribute if type is not primitive or String
1090 return;
1091 }
1092 if (v instanceof Integer && !var.type.getTag().checkRange((Integer) v)) {
1093 throw badClassFile("bad.constant.range", v, var, var.type);
1094 }
1095 var.setData(v);
1096 }
1097
1098 void checkType(Symbol var, Class<?> clazz, Object value) {
1099 if (!clazz.isInstance(value)) {
1100 throw badClassFile("bad.constant.value", value, var, clazz.getSimpleName());
1101 }
1102 }
1103 },
1104
1105 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1106 protected void read(Symbol sym, int attrLen) {
1107 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
1108
1109 s.flags_field |= DEPRECATED;
1110 }
1111 },
1112
1113 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1114 protected void read(Symbol sym, int attrLen) {
1115 int nexceptions = nextChar();
1116 List<Type> thrown = List.nil();
1117 for (int j = 0; j < nexceptions; j++)
1118 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
1119 if (sym.type.getThrownTypes().isEmpty())
1120 sym.type.asMethodType().thrown = thrown.reverse();
1121 }
1122 },
1123
1124 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
1125 protected void read(Symbol sym, int attrLen) {
1126 ClassSymbol c = (ClassSymbol) sym;
1127 if (currentModule.module_info == c) {
1128 //prevent entering the classes too soon:
1129 skipInnerClasses();
1130 } else {
1131 readInnerClasses(c);
1132 }
1133 }
1134 },
1135
1136 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1137 protected void read(Symbol sym, int attrLen) {
1138 int newbp = bp + attrLen;
1139 if (saveParameterNames && !sawMethodParameters) {
1140 // Pick up parameter names from the variable table.
1141 // Parameter names are not explicitly identified as such,
1142 // but all parameter name entries in the LocalVariableTable
1143 // have a start_pc of 0. Therefore, we record the name
1144 // indicies of all slots with a start_pc of zero in the
1145 // parameterNameIndicies array.
1146 // Note that this implicitly honors the JVMS spec that
1147 // there may be more than one LocalVariableTable, and that
1148 // there is no specified ordering for the entries.
1149 int numEntries = nextChar();
1150 for (int i = 0; i < numEntries; i++) {
1151 int start_pc = nextChar();
1152 int length = nextChar();
1153 int nameIndex = nextChar();
1154 int sigIndex = nextChar();
1155 int register = nextChar();
1156 if (start_pc == 0) {
1157 // ensure array large enough
1158 if (register >= parameterNameIndices.length) {
1159 int newSize =
1160 Math.max(register + 1, parameterNameIndices.length + 8);
1161 parameterNameIndices =
1162 Arrays.copyOf(parameterNameIndices, newSize);
1163 }
1164 parameterNameIndices[register] = nameIndex;
1165 haveParameterNameIndices = true;
1166 }
1167 }
1168 }
1169 bp = newbp;
1170 }
1171 },
1172
1173 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1174 protected void read(Symbol sym, int attrLen) {
1175 ClassSymbol c = (ClassSymbol) sym;
1176 Name n = readName(nextChar());
1177 c.sourcefile = new SourceFileObject(n, c.flatname);
1178 // If the class is a toplevel class, originating from a Java source file,
1179 // but the class name does not match the file name, then it is
1180 // an auxiliary class.
1181 String sn = n.toString();
1182 if (c.owner.kind == PCK &&
1183 sn.endsWith(".java") &&
1184 !sn.equals(c.name.toString()+".java")) {
1185 c.flags_field |= AUXILIARY;
1186 }
1187 }
1188 },
1189
1190 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1191 protected void read(Symbol sym, int attrLen) {
1192 sym.flags_field |= SYNTHETIC;
1193 }
1194 },
1195
1196 // standard v49 attributes
1197
1198 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1199 protected void read(Symbol sym, int attrLen) {
1200 int newbp = bp + attrLen;
1201 readEnclosingMethodAttr(sym);
1202 bp = newbp;
1203 }
1204 },
1205
1206 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1207 protected void read(Symbol sym, int attrLen) {
1208 if (sym.kind == TYP) {
1209 ClassSymbol c = (ClassSymbol) sym;
1210 readingClassAttr = true;
1211 try {
1212 ClassType ct1 = (ClassType)c.type;
1213 Assert.check(c == currentOwner);
1214 ct1.typarams_field = readTypeParams(nextChar());
1215 ct1.supertype_field = sigToType();
1216 ListBuffer<Type> is = new ListBuffer<>();
1217 while (sigp != siglimit) is.append(sigToType());
1218 ct1.interfaces_field = is.toList();
1219 } finally {
1220 readingClassAttr = false;
1221 }
1222 } else {
1223 List<Type> thrown = sym.type.getThrownTypes();
1224 sym.type = readType(nextChar());
1225 //- System.err.println(" # " + sym.type);
1226 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1227 sym.type.asMethodType().thrown = thrown;
1228
1229 }
1230 }
1231 },
1232
1233 // v49 annotation attributes
1234
1235 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1236 protected void read(Symbol sym, int attrLen) {
1237 attachAnnotationDefault(sym);
1238 }
1239 },
1240
1241 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1242 protected void read(Symbol sym, int attrLen) {
1243 attachAnnotations(sym);
1244 }
1245 },
1246
1247 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1248 protected void read(Symbol sym, int attrLen) {
1249 readParameterAnnotations(sym);
1250 }
1251 },
1252
1253 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1254 protected void read(Symbol sym, int attrLen) {
1255 attachAnnotations(sym);
1256 }
1257 },
1258
1259 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1260 protected void read(Symbol sym, int attrLen) {
1261 readParameterAnnotations(sym);
1262 }
1263 },
1264
1265 // additional "legacy" v49 attributes, superceded by flags
1266
1267 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1268 protected void read(Symbol sym, int attrLen) {
1269 sym.flags_field |= ANNOTATION;
1270 }
1271 },
1272
1273 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1274 protected void read(Symbol sym, int attrLen) {
1275 sym.flags_field |= BRIDGE;
1276 }
1277 },
1278
1279 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1280 protected void read(Symbol sym, int attrLen) {
1281 sym.flags_field |= ENUM;
1282 }
1283 },
1284
1285 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1286 protected void read(Symbol sym, int attrLen) {
1287 sym.flags_field |= VARARGS;
1288 }
1289 },
1290
1291 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1292 protected void read(Symbol sym, int attrLen) {
1293 attachTypeAnnotations(sym);
1294 }
1295 },
1296
1297 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1298 protected void read(Symbol sym, int attrLen) {
1299 attachTypeAnnotations(sym);
1300 }
1301 },
1302
1303 // The following attributes for a Code attribute are not currently handled
1304 // StackMapTable
1305 // SourceDebugExtension
1306 // LineNumberTable
1307 // LocalVariableTypeTable
1308
1309 // standard v52 attributes
1310
1311 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1312 protected void read(Symbol sym, int attrlen) {
1313 int newbp = bp + attrlen;
1314 if (saveParameterNames) {
1315 sawMethodParameters = true;
1316 int numEntries = nextByte();
1317 parameterNameIndices = new int[numEntries];
1318 haveParameterNameIndices = true;
1319 int index = 0;
1320 for (int i = 0; i < numEntries; i++) {
1321 int nameIndex = nextChar();
1322 int flags = nextChar();
1323 if ((flags & (Flags.MANDATED | Flags.SYNTHETIC)) != 0) {
1324 continue;
1325 }
1326 parameterNameIndices[index++] = nameIndex;
1327 }
1328 }
1329 bp = newbp;
1330 }
1331 },
1332
1333 // standard v53 attributes
1334
1335 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1336 @Override
1337 protected boolean accepts(AttributeKind kind) {
1338 return super.accepts(kind) && allowModules;
1339 }
1340 protected void read(Symbol sym, int attrLen) {
1341 if (sym.kind == TYP && sym.owner.kind == MDL) {
1342 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1343 ListBuffer<Directive> directives = new ListBuffer<>();
1344
1345 Name moduleName = readModuleName(nextChar());
1346 if (currentModule.name != moduleName) {
1347 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1348 }
1349
1350 Set<ModuleFlags> moduleFlags = readModuleFlags(nextChar());
1351 msym.flags.addAll(moduleFlags);
1352 msym.version = readName(nextChar());
1353
1354 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1355 int nrequires = nextChar();
1356 for (int i = 0; i < nrequires; i++) {
1357 ModuleSymbol rsym = syms.enterModule(readModuleName(nextChar()));
1358 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1359 if (rsym == syms.java_base && majorVersion >= V54.major) {
1360 if (flags.contains(RequiresFlag.TRANSITIVE)) {
1361 throw badClassFile("bad.requires.flag", RequiresFlag.TRANSITIVE);
1362 }
1363 if (flags.contains(RequiresFlag.STATIC_PHASE)) {
1364 throw badClassFile("bad.requires.flag", RequiresFlag.STATIC_PHASE);
1365 }
1366 }
1367 nextChar(); // skip compiled version
1368 requires.add(new RequiresDirective(rsym, flags));
1369 }
1370 msym.requires = requires.toList();
1371 directives.addAll(msym.requires);
1372
1373 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1374 int nexports = nextChar();
1375 for (int i = 0; i < nexports; i++) {
1376 Name n = readName(nextChar());
1377 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n)));
1378 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1379 int nto = nextChar();
1380 List<ModuleSymbol> to;
1381 if (nto == 0) {
1382 to = null;
1383 } else {
1384 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1385 for (int t = 0; t < nto; t++)
1386 lb.append(syms.enterModule(readModuleName(nextChar())));
1387 to = lb.toList();
1388 }
1389 exports.add(new ExportsDirective(p, to, flags));
1390 }
1391 msym.exports = exports.toList();
1392 directives.addAll(msym.exports);
1393 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1394 int nopens = nextChar();
1395 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1396 throw badClassFile("module.non.zero.opens", currentModule.name);
1397 }
1398 for (int i = 0; i < nopens; i++) {
1399 Name n = readName(nextChar());
1400 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n)));
1401 Set<OpensFlag> flags = readOpensFlags(nextChar());
1402 int nto = nextChar();
1403 List<ModuleSymbol> to;
1404 if (nto == 0) {
1405 to = null;
1406 } else {
1407 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1408 for (int t = 0; t < nto; t++)
1409 lb.append(syms.enterModule(readModuleName(nextChar())));
1410 to = lb.toList();
1411 }
1412 opens.add(new OpensDirective(p, to, flags));
1413 }
1414 msym.opens = opens.toList();
1415 directives.addAll(msym.opens);
1416
1417 msym.directives = directives.toList();
1418
1419 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1420 int nuses = nextChar();
1421 for (int i = 0; i < nuses; i++) {
1422 Name srvc = readClassName(nextChar());
1423 uses.add(new InterimUsesDirective(srvc));
1424 }
1425 interimUses = uses.toList();
1426
1427 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1428 int nprovides = nextChar();
1429 for (int p = 0; p < nprovides; p++) {
1430 Name srvc = readClassName(nextChar());
1431 int nimpls = nextChar();
1432 ListBuffer<Name> impls = new ListBuffer<>();
1433 for (int i = 0; i < nimpls; i++) {
1434 impls.append(readClassName(nextChar()));
1435 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1436 }
1437 }
1438 interimProvides = provides.toList();
1439 }
1440 }
1441 },
1442
1443 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1444 @Override
1445 protected boolean accepts(AttributeKind kind) {
1446 return super.accepts(kind) && allowModules;
1447 }
1448 protected void read(Symbol sym, int attrLen) {
1449 if (sym.kind == TYP && sym.owner.kind == MDL) {
1450 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1451 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1452 }
1453 }
1454 },
1455 };
1456
1457 for (AttributeReader r: readers)
1458 attributeReaders.put(r.name, r);
1459 }
1460
1461 protected void readEnclosingMethodAttr(Symbol sym) {
1462 // sym is a nested class with an "Enclosing Method" attribute
1463 // remove sym from it's current owners scope and place it in
1464 // the scope specified by the attribute
1465 sym.owner.members().remove(sym);
1466 ClassSymbol self = (ClassSymbol)sym;
1467 ClassSymbol c = readClassSymbol(nextChar());
1468 NameAndType nt = readNameAndType(nextChar());
1469
1470 if (c.members_field == null || c.kind != TYP)
1471 throw badClassFile("bad.enclosing.class", self, c);
1472
1473 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1474 if (nt != null && m == null)
1475 throw badEnclosingMethod(self);
1476
1477 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1478 self.owner = m != null ? m : c;
1479 if (self.name.isEmpty())
1480 self.fullname = names.empty;
1481 else
1482 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1483
1484 if (m != null) {
1485 ((ClassType)sym.type).setEnclosingType(m.type);
1486 } else if ((self.flags_field & STATIC) == 0) {
1487 ((ClassType)sym.type).setEnclosingType(c.type);
1488 } else {
1489 ((ClassType)sym.type).setEnclosingType(Type.noType);
1490 }
1491 enterTypevars(self, self.type);
1492 if (!missingTypeVariables.isEmpty()) {
1493 ListBuffer<Type> typeVars = new ListBuffer<>();
1494 for (Type typevar : missingTypeVariables) {
1495 typeVars.append(findTypeVar(typevar.tsym.name));
1496 }
1497 foundTypeVariables = typeVars.toList();
1498 } else {
1499 foundTypeVariables = List.nil();
1500 }
1501 }
1502
1503 // See java.lang.Class
1504 private Name simpleBinaryName(Name self, Name enclosing) {
1505 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1506 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1507 throw badClassFile("bad.enclosing.method", self);
1508 int index = 1;
1509 while (index < simpleBinaryName.length() &&
1510 isAsciiDigit(simpleBinaryName.charAt(index)))
1511 index++;
1512 return names.fromString(simpleBinaryName.substring(index));
1513 }
1514
1515 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1516 if (nt == null)
1517 return null;
1518
1519 MethodType type = nt.uniqueType.type.asMethodType();
1520
1521 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1522 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1523 return (MethodSymbol)sym;
1524 }
1525
1526 if (nt.name != names.init)
1527 // not a constructor
1528 return null;
1529 if ((flags & INTERFACE) != 0)
1530 // no enclosing instance
1531 return null;
1532 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1533 // no parameters
1534 return null;
1535
1536 // A constructor of an inner class.
1537 // Remove the first argument (the enclosing instance)
1538 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1539 nt.uniqueType.type.getReturnType(),
1540 nt.uniqueType.type.getThrownTypes(),
1541 syms.methodClass));
1542 // Try searching again
1543 return findMethod(nt, scope, flags);
1544 }
1545
1546 /** Similar to Types.isSameType but avoids completion */
1547 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1548 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1549 .prepend(types.erasure(mt1.getReturnType()));
1550 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1551 while (!types1.isEmpty() && !types2.isEmpty()) {
1552 if (types1.head.tsym != types2.head.tsym)
1553 return false;
1554 types1 = types1.tail;
1555 types2 = types2.tail;
1556 }
1557 return types1.isEmpty() && types2.isEmpty();
1558 }
1559
1560 /**
1561 * Character.isDigit answers <tt>true</tt> to some non-ascii
1562 * digits. This one does not. <b>copied from java.lang.Class</b>
1563 */
1564 private static boolean isAsciiDigit(char c) {
1565 return '0' <= c && c <= '9';
1566 }
1567
1568 /** Read member attributes.
1569 */
1570 void readMemberAttrs(Symbol sym) {
1571 readAttrs(sym, AttributeKind.MEMBER);
1572 }
1573
1574 void readAttrs(Symbol sym, AttributeKind kind) {
1575 char ac = nextChar();
1576 for (int i = 0; i < ac; i++) {
1577 Name attrName = readName(nextChar());
1578 int attrLen = nextInt();
1579 AttributeReader r = attributeReaders.get(attrName);
1580 if (r != null && r.accepts(kind))
1581 r.read(sym, attrLen);
1582 else {
1583 bp = bp + attrLen;
1584 }
1585 }
1586 }
1587
1588 private boolean readingClassAttr = false;
1589 private List<Type> missingTypeVariables = List.nil();
1590 private List<Type> foundTypeVariables = List.nil();
1591
1592 /** Read class attributes.
1593 */
1594 void readClassAttrs(ClassSymbol c) {
1595 readAttrs(c, AttributeKind.CLASS);
1596 }
1597
1598 /** Read code block.
1599 */
1600 Code readCode(Symbol owner) {
1601 nextChar(); // max_stack
1602 nextChar(); // max_locals
1603 final int code_length = nextInt();
1604 bp += code_length;
1605 final char exception_table_length = nextChar();
1606 bp += exception_table_length * 8;
1607 readMemberAttrs(owner);
1608 return null;
1609 }
1610
1611 /************************************************************************
1612 * Reading Java-language annotations
1613 ***********************************************************************/
1614
1615 /**
1616 * Save annotations.
1617 */
1618 List<CompoundAnnotationProxy> readAnnotations() {
1619 int numAttributes = nextChar();
1620 ListBuffer<CompoundAnnotationProxy> annotations = new ListBuffer<>();
1621 for (int i = 0; i < numAttributes; i++) {
1622 annotations.append(readCompoundAnnotation());
1623 }
1624 return annotations.toList();
1625 }
1626
1627 /** Attach annotations.
1628 */
1629 void attachAnnotations(final Symbol sym) {
1630 attachAnnotations(sym, readAnnotations());
1631 }
1632
1633 /**
1634 * Attach annotations.
1635 */
1636 void attachAnnotations(final Symbol sym, List<CompoundAnnotationProxy> annotations) {
1637 if (annotations.isEmpty()) {
1638 return;
1639 }
1640 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1641 for (CompoundAnnotationProxy proxy : annotations) {
1642 if (proxy.type.tsym == syms.proprietaryType.tsym)
1643 sym.flags_field |= PROPRIETARY;
1644 else if (proxy.type.tsym == syms.profileType.tsym) {
1645 if (profile != Profile.DEFAULT) {
1646 for (Pair<Name, Attribute> v : proxy.values) {
1647 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1648 Attribute.Constant c = (Attribute.Constant)v.snd;
1649 if (c.type == syms.intType && ((Integer)c.value) > profile.value) {
1650 sym.flags_field |= NOT_IN_PROFILE;
1651 }
1652 }
1653 }
1654 }
1655 } else {
1656 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1657 target = proxy;
1658 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1659 repeatable = proxy;
1660 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1661 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1662 for (Pair<Name, Attribute> v : proxy.values) {
1663 if (v.fst == names.forRemoval && v.snd instanceof Attribute.Constant) {
1664 Attribute.Constant c = (Attribute.Constant)v.snd;
1665 if (c.type == syms.booleanType && ((Integer)c.value) != 0) {
1666 sym.flags_field |= DEPRECATED_REMOVAL;
1667 }
1668 }
1669 }
1670 }
1671 proxies.append(proxy);
1672 }
1673 }
1674 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1675 }
1676
1677 /** Read parameter annotations.
1678 */
1679 void readParameterAnnotations(Symbol meth) {
1680 int numParameters = buf[bp++] & 0xFF;
1681 if (parameterAnnotations == null) {
1682 parameterAnnotations = new ParameterAnnotations[numParameters];
1683 } else if (parameterAnnotations.length != numParameters) {
1684 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1685 }
1686 for (int pnum = 0; pnum < numParameters; pnum++) {
1687 if (parameterAnnotations[pnum] == null) {
1688 parameterAnnotations[pnum] = new ParameterAnnotations();
1689 }
1690 parameterAnnotations[pnum].add(readAnnotations());
1691 }
1692 }
1693
1694 void attachTypeAnnotations(final Symbol sym) {
1695 int numAttributes = nextChar();
1696 if (numAttributes != 0) {
1697 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1698 for (int i = 0; i < numAttributes; i++)
1699 proxies.append(readTypeAnnotation());
1700 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1701 }
1702 }
1703
1704 /** Attach the default value for an annotation element.
1705 */
1706 void attachAnnotationDefault(final Symbol sym) {
1707 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1708 final Attribute value = readAttributeValue();
1709
1710 // The default value is set later during annotation. It might
1711 // be the case that the Symbol sym is annotated _after_ the
1712 // repeating instances that depend on this default value,
1713 // because of this we set an interim value that tells us this
1714 // element (most likely) has a default.
1715 //
1716 // Set interim value for now, reset just before we do this
1717 // properly at annotate time.
1718 meth.defaultValue = value;
1719 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1720 }
1721
1722 Type readTypeOrClassSymbol(int i) {
1723 // support preliminary jsr175-format class files
1724 if (buf[poolIdx[i]] == CONSTANT_Class)
1725 return readClassSymbol(i).type;
1726 return readTypeToProxy(i);
1727 }
1728 Type readEnumType(int i) {
1729 // support preliminary jsr175-format class files
1730 int index = poolIdx[i];
1731 int length = getChar(index + 1);
1732 if (buf[index + length + 2] != ';')
1733 return enterClass(readName(i)).type;
1734 return readTypeToProxy(i);
1735 }
1736 Type readTypeToProxy(int i) {
1737 if (currentModule.module_info == currentOwner) {
1738 int index = poolIdx[i];
1739 return new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1)));
1740 } else {
1741 return readType(i);
1742 }
1743 }
1744
1745 CompoundAnnotationProxy readCompoundAnnotation() {
1746 Type t;
1747 if (currentModule.module_info == currentOwner) {
1748 int index = poolIdx[nextChar()];
1749 t = new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1)));
1750 } else {
1751 t = readTypeOrClassSymbol(nextChar());
1752 }
1753 int numFields = nextChar();
1754 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1755 for (int i=0; i<numFields; i++) {
1756 Name name = readName(nextChar());
1757 Attribute value = readAttributeValue();
1758 pairs.append(new Pair<>(name, value));
1759 }
1760 return new CompoundAnnotationProxy(t, pairs.toList());
1761 }
1762
1763 TypeAnnotationProxy readTypeAnnotation() {
1764 TypeAnnotationPosition position = readPosition();
1765 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1766
1767 return new TypeAnnotationProxy(proxy, position);
1768 }
1769
1770 TypeAnnotationPosition readPosition() {
1771 int tag = nextByte(); // TargetType tag is a byte
1772
1773 if (!TargetType.isValidTargetTypeValue(tag))
1774 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1775
1776 TargetType type = TargetType.fromTargetTypeValue(tag);
1777
1778 switch (type) {
1779 // instanceof
1780 case INSTANCEOF: {
1781 final int offset = nextChar();
1782 final TypeAnnotationPosition position =
1783 TypeAnnotationPosition.instanceOf(readTypePath());
1784 position.offset = offset;
1785 return position;
1786 }
1787 // new expression
1788 case NEW: {
1789 final int offset = nextChar();
1790 final TypeAnnotationPosition position =
1791 TypeAnnotationPosition.newObj(readTypePath());
1792 position.offset = offset;
1793 return position;
1794 }
1795 // constructor/method reference receiver
1796 case CONSTRUCTOR_REFERENCE: {
1797 final int offset = nextChar();
1798 final TypeAnnotationPosition position =
1799 TypeAnnotationPosition.constructorRef(readTypePath());
1800 position.offset = offset;
1801 return position;
1802 }
1803 case METHOD_REFERENCE: {
1804 final int offset = nextChar();
1805 final TypeAnnotationPosition position =
1806 TypeAnnotationPosition.methodRef(readTypePath());
1807 position.offset = offset;
1808 return position;
1809 }
1810 // local variable
1811 case LOCAL_VARIABLE: {
1812 final int table_length = nextChar();
1813 final int[] newLvarOffset = new int[table_length];
1814 final int[] newLvarLength = new int[table_length];
1815 final int[] newLvarIndex = new int[table_length];
1816
1817 for (int i = 0; i < table_length; ++i) {
1818 newLvarOffset[i] = nextChar();
1819 newLvarLength[i] = nextChar();
1820 newLvarIndex[i] = nextChar();
1821 }
1822
1823 final TypeAnnotationPosition position =
1824 TypeAnnotationPosition.localVariable(readTypePath());
1825 position.lvarOffset = newLvarOffset;
1826 position.lvarLength = newLvarLength;
1827 position.lvarIndex = newLvarIndex;
1828 return position;
1829 }
1830 // resource variable
1831 case RESOURCE_VARIABLE: {
1832 final int table_length = nextChar();
1833 final int[] newLvarOffset = new int[table_length];
1834 final int[] newLvarLength = new int[table_length];
1835 final int[] newLvarIndex = new int[table_length];
1836
1837 for (int i = 0; i < table_length; ++i) {
1838 newLvarOffset[i] = nextChar();
1839 newLvarLength[i] = nextChar();
1840 newLvarIndex[i] = nextChar();
1841 }
1842
1843 final TypeAnnotationPosition position =
1844 TypeAnnotationPosition.resourceVariable(readTypePath());
1845 position.lvarOffset = newLvarOffset;
1846 position.lvarLength = newLvarLength;
1847 position.lvarIndex = newLvarIndex;
1848 return position;
1849 }
1850 // exception parameter
1851 case EXCEPTION_PARAMETER: {
1852 final int exception_index = nextChar();
1853 final TypeAnnotationPosition position =
1854 TypeAnnotationPosition.exceptionParameter(readTypePath());
1855 position.setExceptionIndex(exception_index);
1856 return position;
1857 }
1858 // method receiver
1859 case METHOD_RECEIVER:
1860 return TypeAnnotationPosition.methodReceiver(readTypePath());
1861 // type parameter
1862 case CLASS_TYPE_PARAMETER: {
1863 final int parameter_index = nextByte();
1864 return TypeAnnotationPosition
1865 .typeParameter(readTypePath(), parameter_index);
1866 }
1867 case METHOD_TYPE_PARAMETER: {
1868 final int parameter_index = nextByte();
1869 return TypeAnnotationPosition
1870 .methodTypeParameter(readTypePath(), parameter_index);
1871 }
1872 // type parameter bound
1873 case CLASS_TYPE_PARAMETER_BOUND: {
1874 final int parameter_index = nextByte();
1875 final int bound_index = nextByte();
1876 return TypeAnnotationPosition
1877 .typeParameterBound(readTypePath(), parameter_index,
1878 bound_index);
1879 }
1880 case METHOD_TYPE_PARAMETER_BOUND: {
1881 final int parameter_index = nextByte();
1882 final int bound_index = nextByte();
1883 return TypeAnnotationPosition
1884 .methodTypeParameterBound(readTypePath(), parameter_index,
1885 bound_index);
1886 }
1887 // class extends or implements clause
1888 case CLASS_EXTENDS: {
1889 final int type_index = nextChar();
1890 return TypeAnnotationPosition.classExtends(readTypePath(),
1891 type_index);
1892 }
1893 // throws
1894 case THROWS: {
1895 final int type_index = nextChar();
1896 return TypeAnnotationPosition.methodThrows(readTypePath(),
1897 type_index);
1898 }
1899 // method parameter
1900 case METHOD_FORMAL_PARAMETER: {
1901 final int parameter_index = nextByte();
1902 return TypeAnnotationPosition.methodParameter(readTypePath(),
1903 parameter_index);
1904 }
1905 // type cast
1906 case CAST: {
1907 final int offset = nextChar();
1908 final int type_index = nextByte();
1909 final TypeAnnotationPosition position =
1910 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1911 position.offset = offset;
1912 return position;
1913 }
1914 // method/constructor/reference type argument
1915 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1916 final int offset = nextChar();
1917 final int type_index = nextByte();
1918 final TypeAnnotationPosition position = TypeAnnotationPosition
1919 .constructorInvocationTypeArg(readTypePath(), type_index);
1920 position.offset = offset;
1921 return position;
1922 }
1923 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1924 final int offset = nextChar();
1925 final int type_index = nextByte();
1926 final TypeAnnotationPosition position = TypeAnnotationPosition
1927 .methodInvocationTypeArg(readTypePath(), type_index);
1928 position.offset = offset;
1929 return position;
1930 }
1931 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1932 final int offset = nextChar();
1933 final int type_index = nextByte();
1934 final TypeAnnotationPosition position = TypeAnnotationPosition
1935 .constructorRefTypeArg(readTypePath(), type_index);
1936 position.offset = offset;
1937 return position;
1938 }
1939 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1940 final int offset = nextChar();
1941 final int type_index = nextByte();
1942 final TypeAnnotationPosition position = TypeAnnotationPosition
1943 .methodRefTypeArg(readTypePath(), type_index);
1944 position.offset = offset;
1945 return position;
1946 }
1947 // We don't need to worry about these
1948 case METHOD_RETURN:
1949 return TypeAnnotationPosition.methodReturn(readTypePath());
1950 case FIELD:
1951 return TypeAnnotationPosition.field(readTypePath());
1952 case UNKNOWN:
1953 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1954 default:
1955 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1956 }
1957 }
1958
1959 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1960 int len = nextByte();
1961 ListBuffer<Integer> loc = new ListBuffer<>();
1962 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1963 loc = loc.append(nextByte());
1964
1965 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1966
1967 }
1968
1969 Attribute readAttributeValue() {
1970 char c = (char) buf[bp++];
1971 switch (c) {
1972 case 'B':
1973 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1974 case 'C':
1975 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1976 case 'D':
1977 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1978 case 'F':
1979 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1980 case 'I':
1981 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1982 case 'J':
1983 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1984 case 'S':
1985 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1986 case 'Z':
1987 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1988 case 's':
1989 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1990 case 'e':
1991 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1992 case 'c':
1993 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1994 case '[': {
1995 int n = nextChar();
1996 ListBuffer<Attribute> l = new ListBuffer<>();
1997 for (int i=0; i<n; i++)
1998 l.append(readAttributeValue());
1999 return new ArrayAttributeProxy(l.toList());
2000 }
2001 case '@':
2002 return readCompoundAnnotation();
2003 default:
2004 throw new AssertionError("unknown annotation tag '" + c + "'");
2005 }
2006 }
2007
2008 interface ProxyVisitor extends Attribute.Visitor {
2009 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
2010 void visitClassAttributeProxy(ClassAttributeProxy proxy);
2011 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
2012 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
2013 }
2014
2015 static class EnumAttributeProxy extends Attribute {
2016 Type enumType;
2017 Name enumerator;
2018 public EnumAttributeProxy(Type enumType, Name enumerator) {
2019 super(null);
2020 this.enumType = enumType;
2021 this.enumerator = enumerator;
2022 }
2023 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
2024 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2025 public String toString() {
2026 return "/*proxy enum*/" + enumType + "." + enumerator;
2027 }
2028 }
2029
2030 static class ClassAttributeProxy extends Attribute {
2031 Type classType;
2032 public ClassAttributeProxy(Type classType) {
2033 super(null);
2034 this.classType = classType;
2035 }
2036 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
2037 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2038 public String toString() {
2039 return "/*proxy class*/" + classType + ".class";
2040 }
2041 }
2042
2043 static class ArrayAttributeProxy extends Attribute {
2044 List<Attribute> values;
2045 ArrayAttributeProxy(List<Attribute> values) {
2046 super(null);
2047 this.values = values;
2048 }
2049 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
2050 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2051 public String toString() {
2052 return "{" + values + "}";
2053 }
2054 }
2055
2056 /** A temporary proxy representing a compound attribute.
2057 */
2058 static class CompoundAnnotationProxy extends Attribute {
2059 final List<Pair<Name,Attribute>> values;
2060 public CompoundAnnotationProxy(Type type,
2061 List<Pair<Name,Attribute>> values) {
2062 super(type);
2063 this.values = values;
2064 }
2065 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
2066 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2067 public String toString() {
2068 StringBuilder buf = new StringBuilder();
2069 buf.append("@");
2070 buf.append(type.tsym.getQualifiedName());
2071 buf.append("/*proxy*/{");
2072 boolean first = true;
2073 for (List<Pair<Name,Attribute>> v = values;
2074 v.nonEmpty(); v = v.tail) {
2075 Pair<Name,Attribute> value = v.head;
2076 if (!first) buf.append(",");
2077 first = false;
2078 buf.append(value.fst);
2079 buf.append("=");
2080 buf.append(value.snd);
2081 }
2082 buf.append("}");
2083 return buf.toString();
2084 }
2085 }
2086
2087 /** A temporary proxy representing a type annotation.
2088 */
2089 static class TypeAnnotationProxy {
2090 final CompoundAnnotationProxy compound;
2091 final TypeAnnotationPosition position;
2092 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2093 TypeAnnotationPosition position) {
2094 this.compound = compound;
2095 this.position = position;
2096 }
2097 }
2098
2099 class AnnotationDeproxy implements ProxyVisitor {
2100 private ClassSymbol requestingOwner;
2101
2102 AnnotationDeproxy(ClassSymbol owner) {
2103 this.requestingOwner = owner;
2104 }
2105
2106 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2107 // also must fill in types!!!!
2108 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2109 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2110 buf.append(deproxyCompound(l.head));
2111 }
2112 return buf.toList();
2113 }
2114
2115 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2116 Type annotationType = resolvePossibleProxyType(a.type);
2117 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2118 for (List<Pair<Name,Attribute>> l = a.values;
2119 l.nonEmpty();
2120 l = l.tail) {
2121 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2122 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2123 }
2124 return new Attribute.Compound(annotationType, buf.toList());
2125 }
2126
2127 MethodSymbol findAccessMethod(Type container, Name name) {
2128 CompletionFailure failure = null;
2129 try {
2130 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2131 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2132 return (MethodSymbol) sym;
2133 }
2134 } catch (CompletionFailure ex) {
2135 failure = ex;
2136 }
2137 // The method wasn't found: emit a warning and recover
2138 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2139 try {
2140 if (lintClassfile) {
2141 if (failure == null) {
2142 log.warning(Warnings.AnnotationMethodNotFound(container, name));
2143 } else {
2144 log.warning(Warnings.AnnotationMethodNotFoundReason(container,
2145 name,
2146 failure.getDetailValue()));//diagnostic, if present
2147 }
2148 }
2149 } finally {
2150 log.useSource(prevSource);
2151 }
2152 // Construct a new method type and symbol. Use bottom
2153 // type (typeof null) as return type because this type is
2154 // a subtype of all reference types and can be converted
2155 // to primitive types by unboxing.
2156 MethodType mt = new MethodType(List.nil(),
2157 syms.botType,
2158 List.nil(),
2159 syms.methodClass);
2160 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2161 }
2162
2163 Attribute result;
2164 Type type;
2165 Attribute deproxy(Type t, Attribute a) {
2166 Type oldType = type;
2167 try {
2168 type = t;
2169 a.accept(this);
2170 return result;
2171 } finally {
2172 type = oldType;
2173 }
2174 }
2175
2176 // implement Attribute.Visitor below
2177
2178 public void visitConstant(Attribute.Constant value) {
2179 // assert value.type == type;
2180 result = value;
2181 }
2182
2183 public void visitClass(Attribute.Class clazz) {
2184 result = clazz;
2185 }
2186
2187 public void visitEnum(Attribute.Enum e) {
2188 throw new AssertionError(); // shouldn't happen
2189 }
2190
2191 public void visitCompound(Attribute.Compound compound) {
2192 throw new AssertionError(); // shouldn't happen
2193 }
2194
2195 public void visitArray(Attribute.Array array) {
2196 throw new AssertionError(); // shouldn't happen
2197 }
2198
2199 public void visitError(Attribute.Error e) {
2200 throw new AssertionError(); // shouldn't happen
2201 }
2202
2203 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2204 // type.tsym.flatName() should == proxy.enumFlatName
2205 Type enumType = resolvePossibleProxyType(proxy.enumType);
2206 TypeSymbol enumTypeSym = enumType.tsym;
2207 VarSymbol enumerator = null;
2208 CompletionFailure failure = null;
2209 try {
2210 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2211 if (sym.kind == VAR) {
2212 enumerator = (VarSymbol)sym;
2213 break;
2214 }
2215 }
2216 }
2217 catch (CompletionFailure ex) {
2218 failure = ex;
2219 }
2220 if (enumerator == null) {
2221 if (failure != null) {
2222 log.warning(Warnings.UnknownEnumConstantReason(currentClassFile,
2223 enumTypeSym,
2224 proxy.enumerator,
2225 failure.getDiagnostic()));
2226 } else {
2227 log.warning(Warnings.UnknownEnumConstant(currentClassFile,
2228 enumTypeSym,
2229 proxy.enumerator));
2230 }
2231 result = new Attribute.Enum(enumTypeSym.type,
2232 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2233 } else {
2234 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2235 }
2236 }
2237
2238 @Override
2239 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2240 Type classType = resolvePossibleProxyType(proxy.classType);
2241 result = new Attribute.Class(types, classType);
2242 }
2243
2244 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2245 int length = proxy.values.length();
2246 Attribute[] ats = new Attribute[length];
2247 Type elemtype = types.elemtype(type);
2248 int i = 0;
2249 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2250 ats[i++] = deproxy(elemtype, p.head);
2251 }
2252 result = new Attribute.Array(type, ats);
2253 }
2254
2255 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2256 result = deproxyCompound(proxy);
2257 }
2258
2259 Type resolvePossibleProxyType(Type t) {
2260 if (t instanceof ProxyType) {
2261 Assert.check(requestingOwner.owner.kind == MDL);
2262 ModuleSymbol prevCurrentModule = currentModule;
2263 currentModule = (ModuleSymbol) requestingOwner.owner;
2264 try {
2265 return ((ProxyType) t).resolve();
2266 } finally {
2267 currentModule = prevCurrentModule;
2268 }
2269 } else {
2270 return t;
2271 }
2272 }
2273 }
2274
2275 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2276 final MethodSymbol sym;
2277 final Attribute value;
2278 final JavaFileObject classFile = currentClassFile;
2279
2280 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2281 super(currentOwner.kind == MTH
2282 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2283 this.sym = sym;
2284 this.value = value;
2285 }
2286
2287 @Override
2288 public void run() {
2289 JavaFileObject previousClassFile = currentClassFile;
2290 try {
2291 // Reset the interim value set earlier in
2292 // attachAnnotationDefault().
2293 sym.defaultValue = null;
2294 currentClassFile = classFile;
2295 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2296 } finally {
2297 currentClassFile = previousClassFile;
2298 }
2299 }
2300
2301 @Override
2302 public String toString() {
2303 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2304 }
2305 }
2306
2307 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2308 final Symbol sym;
2309 final List<CompoundAnnotationProxy> l;
2310 final JavaFileObject classFile;
2311
2312 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2313 super(currentOwner.kind == MTH
2314 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2315 if (sym.kind == TYP && sym.owner.kind == MDL) {
2316 this.sym = sym.owner;
2317 } else {
2318 this.sym = sym;
2319 }
2320 this.l = l;
2321 this.classFile = currentClassFile;
2322 }
2323
2324 @Override
2325 public void run() {
2326 JavaFileObject previousClassFile = currentClassFile;
2327 try {
2328 currentClassFile = classFile;
2329 List<Attribute.Compound> newList = deproxyCompoundList(l);
2330 for (Attribute.Compound attr : newList) {
2331 if (attr.type.tsym == syms.deprecatedType.tsym) {
2332 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2333 Attribute forRemoval = attr.member(names.forRemoval);
2334 if (forRemoval instanceof Attribute.Constant) {
2335 Attribute.Constant c = (Attribute.Constant) forRemoval;
2336 if (c.type == syms.booleanType && ((Integer) c.value) != 0) {
2337 sym.flags_field |= DEPRECATED_REMOVAL;
2338 }
2339 }
2340 }
2341 }
2342 if (sym.annotationsPendingCompletion()) {
2343 sym.setDeclarationAttributes(newList);
2344 } else {
2345 sym.appendAttributes(newList);
2346 }
2347 } finally {
2348 currentClassFile = previousClassFile;
2349 }
2350 }
2351
2352 @Override
2353 public String toString() {
2354 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2355 }
2356 }
2357
2358 class TypeAnnotationCompleter extends AnnotationCompleter {
2359
2360 List<TypeAnnotationProxy> proxies;
2361
2362 TypeAnnotationCompleter(Symbol sym,
2363 List<TypeAnnotationProxy> proxies) {
2364 super(sym, List.nil());
2365 this.proxies = proxies;
2366 }
2367
2368 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2369 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2370 for (TypeAnnotationProxy proxy: proxies) {
2371 Attribute.Compound compound = deproxyCompound(proxy.compound);
2372 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2373 buf.add(typeCompound);
2374 }
2375 return buf.toList();
2376 }
2377
2378 @Override
2379 public void run() {
2380 JavaFileObject previousClassFile = currentClassFile;
2381 try {
2382 currentClassFile = classFile;
2383 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2384 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2385 } finally {
2386 currentClassFile = previousClassFile;
2387 }
2388 }
2389 }
2390
2391
2392 /************************************************************************
2393 * Reading Symbols
2394 ***********************************************************************/
2395
2396 /** Read a field.
2397 */
2398 VarSymbol readField() {
2399 long flags = adjustFieldFlags(nextChar());
2400 Name name = readName(nextChar());
2401 Type type = readType(nextChar());
2402 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2403 readMemberAttrs(v);
2404 return v;
2405 }
2406
2407 /** Read a method.
2408 */
2409 MethodSymbol readMethod() {
2410 long flags = adjustMethodFlags(nextChar());
2411 Name name = readName(nextChar());
2412 Type type = readType(nextChar());
2413 if (currentOwner.isInterface() &&
2414 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2415 if (majorVersion > Version.V52.major ||
2416 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2417 if ((flags & (STATIC | PRIVATE)) == 0) {
2418 currentOwner.flags_field |= DEFAULT;
2419 flags |= DEFAULT | ABSTRACT;
2420 }
2421 } else {
2422 //protect against ill-formed classfiles
2423 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2424 Integer.toString(majorVersion),
2425 Integer.toString(minorVersion));
2426 }
2427 }
2428 if (name == names.init && currentOwner.hasOuterInstance()) {
2429 // Sometimes anonymous classes don't have an outer
2430 // instance, however, there is no reliable way to tell so
2431 // we never strip this$n
2432 // ditto for local classes. Local classes that have an enclosing method set
2433 // won't pass the "hasOuterInstance" check above, but those that don't have an
2434 // enclosing method (i.e. from initializers) will pass that check.
2435 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2436 if (!currentOwner.name.isEmpty() && !local)
2437 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2438 type.getReturnType(),
2439 type.getThrownTypes(),
2440 syms.methodClass);
2441 }
2442 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2443 if (types.isSignaturePolymorphic(m)) {
2444 m.flags_field |= SIGNATURE_POLYMORPHIC;
2445 }
2446 if (saveParameterNames)
2447 initParameterNames(m);
2448 Symbol prevOwner = currentOwner;
2449 currentOwner = m;
2450 try {
2451 readMemberAttrs(m);
2452 } finally {
2453 currentOwner = prevOwner;
2454 }
2455 setParameters(m, type);
2456
2457 if ((flags & VARARGS) != 0) {
2458 final Type last = type.getParameterTypes().last();
2459 if (last == null || !last.hasTag(ARRAY)) {
2460 m.flags_field &= ~VARARGS;
2461 throw badClassFile("malformed.vararg.method", m);
2462 }
2463 }
2464
2465 return m;
2466 }
2467
2468 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2469 boolean isVarargs = (flags & VARARGS) != 0;
2470 if (isVarargs) {
2471 Type varargsElem = args.last();
2472 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2473 for (Type t : args) {
2474 adjustedArgs.append(t != varargsElem ?
2475 t :
2476 ((ArrayType)t).makeVarargs());
2477 }
2478 args = adjustedArgs.toList();
2479 }
2480 return args.tail;
2481 }
2482
2483 /**
2484 * Init the parameter names array.
2485 * Parameter names are currently inferred from the names in the
2486 * LocalVariableTable attributes of a Code attribute.
2487 * (Note: this means parameter names are currently not available for
2488 * methods without a Code attribute.)
2489 * This method initializes an array in which to store the name indexes
2490 * of parameter names found in LocalVariableTable attributes. It is
2491 * slightly supersized to allow for additional slots with a start_pc of 0.
2492 */
2493 void initParameterNames(MethodSymbol sym) {
2494 // make allowance for synthetic parameters.
2495 final int excessSlots = 4;
2496 int expectedParameterSlots =
2497 Code.width(sym.type.getParameterTypes()) + excessSlots;
2498 if (parameterNameIndices == null
2499 || parameterNameIndices.length < expectedParameterSlots) {
2500 parameterNameIndices = new int[expectedParameterSlots];
2501 } else
2502 Arrays.fill(parameterNameIndices, 0);
2503 haveParameterNameIndices = false;
2504 sawMethodParameters = false;
2505 }
2506
2507 /**
2508 * Set the parameters for a method symbol, including any names and
2509 * annotations that were read.
2510 *
2511 * <p>The type of the symbol may have changed while reading the
2512 * method attributes (see the Signature attribute). This may be
2513 * because of generic information or because anonymous synthetic
2514 * parameters were added. The original type (as read from the
2515 * method descriptor) is used to help guess the existence of
2516 * anonymous synthetic parameters.
2517 */
2518 void setParameters(MethodSymbol sym, Type jvmType) {
2519 // If we get parameter names from MethodParameters, then we
2520 // don't need to skip.
2521 int firstParam = 0;
2522 if (!sawMethodParameters) {
2523 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2524 // the code in readMethod may have skipped the first
2525 // parameter when setting up the MethodType. If so, we
2526 // make a corresponding allowance here for the position of
2527 // the first parameter. Note that this assumes the
2528 // skipped parameter has a width of 1 -- i.e. it is not
2529 // a double width type (long or double.)
2530 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2531 // Sometimes anonymous classes don't have an outer
2532 // instance, however, there is no reliable way to tell so
2533 // we never strip this$n
2534 if (!currentOwner.name.isEmpty())
2535 firstParam += 1;
2536 }
2537
2538 if (sym.type != jvmType) {
2539 // reading the method attributes has caused the
2540 // symbol's type to be changed. (i.e. the Signature
2541 // attribute.) This may happen if there are hidden
2542 // (synthetic) parameters in the descriptor, but not
2543 // in the Signature. The position of these hidden
2544 // parameters is unspecified; for now, assume they are
2545 // at the beginning, and so skip over them. The
2546 // primary case for this is two hidden parameters
2547 // passed into Enum constructors.
2548 int skip = Code.width(jvmType.getParameterTypes())
2549 - Code.width(sym.type.getParameterTypes());
2550 firstParam += skip;
2551 }
2552 }
2553 List<Name> paramNames = List.nil();
2554 ListBuffer<VarSymbol> params = new ListBuffer<>();
2555 int nameIndex = firstParam;
2556 int annotationIndex = 0;
2557 for (Type t: sym.type.getParameterTypes()) {
2558 Name name = parameterName(nameIndex, paramNames);
2559 paramNames = paramNames.prepend(name);
2560 VarSymbol param = new VarSymbol(PARAMETER, name, t, sym);
2561 params.append(param);
2562 if (parameterAnnotations != null) {
2563 ParameterAnnotations annotations = parameterAnnotations[annotationIndex];
2564 if (annotations != null && annotations.proxies != null
2565 && !annotations.proxies.isEmpty()) {
2566 annotate.normal(new AnnotationCompleter(param, annotations.proxies));
2567 }
2568 }
2569 nameIndex += sawMethodParameters ? 1 : Code.width(t);
2570 annotationIndex++;
2571 }
2572 if (parameterAnnotations != null && parameterAnnotations.length != annotationIndex) {
2573 throw badClassFile("bad.runtime.invisible.param.annotations", sym);
2574 }
2575 Assert.checkNull(sym.params);
2576 sym.params = params.toList();
2577 parameterAnnotations = null;
2578 parameterNameIndices = null;
2579 }
2580
2581
2582 // Returns the name for the parameter at position 'index', either using
2583 // names read from the MethodParameters, or by synthesizing a name that
2584 // is not on the 'exclude' list.
2585 private Name parameterName(int index, List<Name> exclude) {
2586 if (parameterNameIndices != null && index < parameterNameIndices.length
2587 && parameterNameIndices[index] != 0) {
2588 return readName(parameterNameIndices[index]);
2589 }
2590 String prefix = "arg";
2591 while (true) {
2592 Name argName = names.fromString(prefix + exclude.size());
2593 if (!exclude.contains(argName))
2594 return argName;
2595 prefix += "$";
2596 }
2597 }
2598
2599 /**
2600 * skip n bytes
2601 */
2602 void skipBytes(int n) {
2603 bp = bp + n;
2604 }
2605
2606 /** Skip a field or method
2607 */
2608 void skipMember() {
2609 bp = bp + 6;
2610 char ac = nextChar();
2611 for (int i = 0; i < ac; i++) {
2612 bp = bp + 2;
2613 int attrLen = nextInt();
2614 bp = bp + attrLen;
2615 }
2616 }
2617
2618 void skipInnerClasses() {
2619 int n = nextChar();
2620 for (int i = 0; i < n; i++) {
2621 nextChar();
2622 nextChar();
2623 nextChar();
2624 nextChar();
2625 }
2626 }
2627
2628 /** Enter type variables of this classtype and all enclosing ones in
2629 * `typevars'.
2630 */
2631 protected void enterTypevars(Symbol sym, Type t) {
2632 if (t.getEnclosingType() != null) {
2633 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
2634 enterTypevars(sym.owner, t.getEnclosingType());
2635 }
2636 } else if (sym.kind == MTH && !sym.isStatic()) {
2637 enterTypevars(sym.owner, sym.owner.type);
2638 }
2639 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
2640 typevars.enter(xs.head.tsym);
2641 }
2642 }
2643
2644 protected ClassSymbol enterClass(Name name) {
2645 if (syms.proprietaryType.tsym.flatName() == name)
2646 return (ClassSymbol) syms.proprietaryType.tsym;
2647 return syms.enterClass(currentModule, name);
2648 }
2649
2650 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
2651 return syms.enterClass(currentModule, name, owner);
2652 }
2653
2654 /** Read contents of a given class symbol `c'. Both external and internal
2655 * versions of an inner class are read.
2656 */
2657 void readClass(ClassSymbol c) {
2658 ClassType ct = (ClassType)c.type;
2659
2660 // allocate scope for members
2661 c.members_field = WriteableScope.create(c);
2662
2663 // prepare type variable table
2664 typevars = typevars.dup(currentOwner);
2665 if (ct.getEnclosingType().hasTag(CLASS))
2666 enterTypevars(c.owner, ct.getEnclosingType());
2667
2668 // read flags, or skip if this is an inner class
2669 long f = nextChar();
2670 long flags = adjustClassFlags(f);
2671 if ((flags & MODULE) == 0) {
2672 if (c.owner.kind == PCK || c.owner.kind == ERR) c.flags_field = flags;
2673 // read own class name and check that it matches
2674 currentModule = c.packge().modle;
2675 ClassSymbol self = readClassSymbol(nextChar());
2676 if (c != self) {
2677 throw badClassFile("class.file.wrong.class",
2678 self.flatname);
2679 }
2680 } else {
2681 if (majorVersion < Version.V53.major) {
2682 throw badClassFile("anachronistic.module.info",
2683 Integer.toString(majorVersion),
2684 Integer.toString(minorVersion));
2685 }
2686 c.flags_field = flags;
2687 currentModule = (ModuleSymbol) c.owner;
2688 int this_class = nextChar();
2689 // temp, no check on this_class
2690 }
2691
2692 // class attributes must be read before class
2693 // skip ahead to read class attributes
2694 int startbp = bp;
2695 nextChar();
2696 char interfaceCount = nextChar();
2697 bp += interfaceCount * 2;
2698 char fieldCount = nextChar();
2699 for (int i = 0; i < fieldCount; i++) skipMember();
2700 char methodCount = nextChar();
2701 for (int i = 0; i < methodCount; i++) skipMember();
2702 readClassAttrs(c);
2703
2704 if (readAllOfClassFile) {
2705 for (int i = 1; i < poolObj.length; i++) readPool(i);
2706 c.pool = new Pool(poolObj.length, poolObj, types);
2707 }
2708
2709 // reset and read rest of classinfo
2710 bp = startbp;
2711 int n = nextChar();
2712 if ((flags & MODULE) != 0 && n > 0) {
2713 throw badClassFile("module.info.invalid.super.class");
2714 }
2715 if (ct.supertype_field == null)
2716 ct.supertype_field = (n == 0)
2717 ? Type.noType
2718 : readClassSymbol(n).erasure(types);
2719 n = nextChar();
2720 List<Type> is = List.nil();
2721 for (int i = 0; i < n; i++) {
2722 Type _inter = readClassSymbol(nextChar()).erasure(types);
2723 is = is.prepend(_inter);
2724 }
2725 if (ct.interfaces_field == null)
2726 ct.interfaces_field = is.reverse();
2727
2728 Assert.check(fieldCount == nextChar());
2729 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2730 Assert.check(methodCount == nextChar());
2731 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2732
2733 typevars = typevars.leave();
2734 }
2735
2736 /** Read inner class info. For each inner/outer pair allocate a
2737 * member class.
2738 */
2739 void readInnerClasses(ClassSymbol c) {
2740 int n = nextChar();
2741 for (int i = 0; i < n; i++) {
2742 nextChar(); // skip inner class symbol
2743 ClassSymbol outer = readClassSymbol(nextChar());
2744 Name name = readName(nextChar());
2745 if (name == null) name = names.empty;
2746 long flags = adjustClassFlags(nextChar());
2747 if (outer != null) { // we have a member class
2748 if (name == names.empty)
2749 name = names.one;
2750 ClassSymbol member = enterClass(name, outer);
2751 if ((flags & STATIC) == 0) {
2752 ((ClassType)member.type).setEnclosingType(outer.type);
2753 if (member.erasure_field != null)
2754 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2755 }
2756 if (c == outer) {
2757 member.flags_field = flags;
2758 enterMember(c, member);
2759 }
2760 }
2761 }
2762 }
2763
2764 /** Read a class definition from the bytes in buf.
2765 */
2766 private void readClassBuffer(ClassSymbol c) throws IOException {
2767 int magic = nextInt();
2768 if (magic != JAVA_MAGIC)
2769 throw badClassFile("illegal.start.of.class.file");
2770
2771 minorVersion = nextChar();
2772 majorVersion = nextChar();
2773 int maxMajor = Version.MAX().major;
2774 int maxMinor = Version.MAX().minor;
2775 if (majorVersion > maxMajor ||
2776 majorVersion * 1000 + minorVersion <
2777 Version.MIN().major * 1000 + Version.MIN().minor) {
2778 if (majorVersion == (maxMajor + 1))
2779 log.warning(Warnings.BigMajorVersion(currentClassFile,
2780 majorVersion,
2781 maxMajor));
2782 else
2783 throw badClassFile("wrong.version",
2784 Integer.toString(majorVersion),
2785 Integer.toString(minorVersion),
2786 Integer.toString(maxMajor),
2787 Integer.toString(maxMinor));
2788 }
2789
2790 if (minorVersion == ClassFile.PREVIEW_MINOR_VERSION) {
2791 if (!preview.isEnabled()) {
2792 log.error(preview.disabledError(currentClassFile, majorVersion));
2793 } else {
2794 preview.warnPreview(c.classfile, majorVersion);
2795 }
2796 }
2797
2798 indexPool();
2799 if (signatureBuffer.length < bp) {
2800 int ns = Integer.highestOneBit(bp) << 1;
2801 signatureBuffer = new byte[ns];
2802 }
2803 readClass(c);
2804 }
2805
2806 public void readClassFile(ClassSymbol c) {
2807 currentOwner = c;
2808 currentClassFile = c.classfile;
2809 warnedAttrs.clear();
2810 filling = true;
2811 target = null;
2812 repeatable = null;
2813 try {
2814 bp = 0;
2815 buf = readInputStream(buf, c.classfile.openInputStream());
2816 readClassBuffer(c);
2817 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2818 List<Type> missing = missingTypeVariables;
2819 List<Type> found = foundTypeVariables;
2820 missingTypeVariables = List.nil();
2821 foundTypeVariables = List.nil();
2822 interimUses = List.nil();
2823 interimProvides = List.nil();
2824 filling = false;
2825 ClassType ct = (ClassType)currentOwner.type;
2826 ct.supertype_field =
2827 types.subst(ct.supertype_field, missing, found);
2828 ct.interfaces_field =
2829 types.subst(ct.interfaces_field, missing, found);
2830 ct.typarams_field =
2831 types.substBounds(ct.typarams_field, missing, found);
2832 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
2833 types.head.tsym.type = types.head;
2834 }
2835 } else if (missingTypeVariables.isEmpty() !=
2836 foundTypeVariables.isEmpty()) {
2837 Name name = missingTypeVariables.head.tsym.name;
2838 throw badClassFile("undecl.type.var", name);
2839 }
2840
2841 if ((c.flags_field & Flags.ANNOTATION) != 0) {
2842 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
2843 } else {
2844 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
2845 }
2846
2847 if (c == currentModule.module_info) {
2848 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
2849 Assert.check(currentModule.isCompleted());
2850 currentModule.usesProvidesCompleter =
2851 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
2852 } else {
2853 currentModule.uses = List.nil();
2854 currentModule.provides = List.nil();
2855 }
2856 }
2857 } catch (IOException | ClosedFileSystemException ex) {
2858 throw badClassFile("unable.to.access.file", ex.toString());
2859 } catch (ArrayIndexOutOfBoundsException ex) {
2860 throw badClassFile("bad.class.file", c.flatname);
2861 } finally {
2862 interimUses = List.nil();
2863 interimProvides = List.nil();
2864 missingTypeVariables = List.nil();
2865 foundTypeVariables = List.nil();
2866 filling = false;
2867 }
2868 }
2869 // where
2870 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2871 try {
2872 buf = ensureCapacity(buf, s.available());
2873 int r = s.read(buf);
2874 int bp = 0;
2875 while (r != -1) {
2876 bp += r;
2877 buf = ensureCapacity(buf, bp);
2878 r = s.read(buf, bp, buf.length - bp);
2879 }
2880 return buf;
2881 } finally {
2882 try {
2883 s.close();
2884 } catch (IOException e) {
2885 /* Ignore any errors, as this stream may have already
2886 * thrown a related exception which is the one that
2887 * should be reported.
2888 */
2889 }
2890 }
2891 }
2892 /*
2893 * ensureCapacity will increase the buffer as needed, taking note that
2894 * the new buffer will always be greater than the needed and never
2895 * exactly equal to the needed size or bp. If equal then the read (above)
2896 * will infinitely loop as buf.length - bp == 0.
2897 */
2898 private static byte[] ensureCapacity(byte[] buf, int needed) {
2899 if (buf.length <= needed) {
2900 byte[] old = buf;
2901 buf = new byte[Integer.highestOneBit(needed) << 1];
2902 System.arraycopy(old, 0, buf, 0, old.length);
2903 }
2904 return buf;
2905 }
2906
2907 /** We can only read a single class file at a time; this
2908 * flag keeps track of when we are currently reading a class
2909 * file.
2910 */
2911 public boolean filling = false;
2912
2913 /************************************************************************
2914 * Adjusting flags
2915 ***********************************************************************/
2916
2917 long adjustFieldFlags(long flags) {
2918 return flags;
2919 }
2920
2921 long adjustMethodFlags(long flags) {
2922 if ((flags & ACC_BRIDGE) != 0) {
2923 flags &= ~ACC_BRIDGE;
2924 flags |= BRIDGE;
2925 }
2926 if ((flags & ACC_VARARGS) != 0) {
2927 flags &= ~ACC_VARARGS;
2928 flags |= VARARGS;
2929 }
2930 return flags;
2931 }
2932
2933 long adjustClassFlags(long flags) {
2934 if ((flags & ACC_MODULE) != 0) {
2935 flags &= ~ACC_MODULE;
2936 flags |= MODULE;
2937 }
2938 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2939 }
2940
2941 /**
2942 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2943 * The attribute is only the last component of the original filename, so is unlikely
2944 * to be valid as is, so operations other than those to access the name throw
2945 * UnsupportedOperationException
2946 */
2947 private static class SourceFileObject implements JavaFileObject {
2948
2949 /** The file's name.
2950 */
2951 private final Name name;
2952 private final Name flatname;
2953
2954 public SourceFileObject(Name name, Name flatname) {
2955 this.name = name;
2956 this.flatname = flatname;
2957 }
2958
2959 @Override @DefinedBy(Api.COMPILER)
2960 public URI toUri() {
2961 try {
2962 return new URI(null, name.toString(), null);
2963 } catch (URISyntaxException e) {
2964 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
2965 }
2966 }
2967
2968 @Override @DefinedBy(Api.COMPILER)
2969 public String getName() {
2970 return name.toString();
2971 }
2972
2973 @Override @DefinedBy(Api.COMPILER)
2974 public JavaFileObject.Kind getKind() {
2975 return BaseFileManager.getKind(getName());
2976 }
2977
2978 @Override @DefinedBy(Api.COMPILER)
2979 public InputStream openInputStream() {
2980 throw new UnsupportedOperationException();
2981 }
2982
2983 @Override @DefinedBy(Api.COMPILER)
2984 public OutputStream openOutputStream() {
2985 throw new UnsupportedOperationException();
2986 }
2987
2988 @Override @DefinedBy(Api.COMPILER)
2989 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2990 throw new UnsupportedOperationException();
2991 }
2992
2993 @Override @DefinedBy(Api.COMPILER)
2994 public Reader openReader(boolean ignoreEncodingErrors) {
2995 throw new UnsupportedOperationException();
2996 }
2997
2998 @Override @DefinedBy(Api.COMPILER)
2999 public Writer openWriter() {
3000 throw new UnsupportedOperationException();
3001 }
3002
3003 @Override @DefinedBy(Api.COMPILER)
3004 public long getLastModified() {
3005 throw new UnsupportedOperationException();
3006 }
3007
3008 @Override @DefinedBy(Api.COMPILER)
3009 public boolean delete() {
3010 throw new UnsupportedOperationException();
3011 }
3012
3013 @Override @DefinedBy(Api.COMPILER)
3014 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
3015 return true; // fail-safe mode
3016 }
3017
3018 @Override @DefinedBy(Api.COMPILER)
3019 public NestingKind getNestingKind() {
3020 return null;
3021 }
3022
3023 @Override @DefinedBy(Api.COMPILER)
3024 public Modifier getAccessLevel() {
3025 return null;
3026 }
3027
3028 /**
3029 * Check if two file objects are equal.
3030 * SourceFileObjects are just placeholder objects for the value of a
3031 * SourceFile attribute, and do not directly represent specific files.
3032 * Two SourceFileObjects are equal if their names are equal.
3033 */
3034 @Override
3035 public boolean equals(Object other) {
3036 if (this == other)
3037 return true;
3038
3039 if (!(other instanceof SourceFileObject))
3040 return false;
3041
3042 SourceFileObject o = (SourceFileObject) other;
3043 return name.equals(o.name);
3044 }
3045
3046 @Override
3047 public int hashCode() {
3048 return name.hashCode();
3049 }
3050 }
3051
3052 private class CompleterDeproxy implements AnnotationTypeCompleter {
3053 ClassSymbol proxyOn;
3054 CompoundAnnotationProxy target;
3055 CompoundAnnotationProxy repeatable;
3056
3057 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
3058 CompoundAnnotationProxy repeatable)
3059 {
3060 this.proxyOn = c;
3061 this.target = target;
3062 this.repeatable = repeatable;
3063 }
3064
3065 @Override
3066 public void complete(ClassSymbol sym) {
3067 Assert.check(proxyOn == sym);
3068 Attribute.Compound theTarget = null, theRepeatable = null;
3069 AnnotationDeproxy deproxy;
3070
3071 try {
3072 if (target != null) {
3073 deproxy = new AnnotationDeproxy(proxyOn);
3074 theTarget = deproxy.deproxyCompound(target);
3075 }
3076
3077 if (repeatable != null) {
3078 deproxy = new AnnotationDeproxy(proxyOn);
3079 theRepeatable = deproxy.deproxyCompound(repeatable);
3080 }
3081 } catch (Exception e) {
3082 throw new CompletionFailure(sym,
3083 ClassReader.this.diagFactory.fragment(Fragments.ExceptionMessage(e.getMessage())),
3084 dcfh);
3085 }
3086
3087 sym.getAnnotationTypeMetadata().setTarget(theTarget);
3088 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
3089 }
3090 }
3091
3092 private class ProxyType extends Type {
3093
3094 private final byte[] content;
3095
3096 public ProxyType(byte[] content) {
3097 super(syms.noSymbol, TypeMetadata.EMPTY);
3098 this.content = content;
3099 }
3100
3101 @Override
3102 public TypeTag getTag() {
3103 return TypeTag.NONE;
3104 }
3105
3106 @Override
3107 public Type cloneWithMetadata(TypeMetadata metadata) {
3108 throw new UnsupportedOperationException();
3109 }
3110
3111 public Type resolve() {
3112 return sigToType(content, 0, content.length);
3113 }
3114
3115 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3116 public String toString() {
3117 return "<ProxyType>";
3118 }
3119
3120 }
3121
3122 private static final class InterimUsesDirective {
3123 public final Name service;
3124
3125 public InterimUsesDirective(Name service) {
3126 this.service = service;
3127 }
3128
3129 }
3130
3131 private static final class InterimProvidesDirective {
3132 public final Name service;
3133 public final List<Name> impls;
3134
3135 public InterimProvidesDirective(Name service, List<Name> impls) {
3136 this.service = service;
3137 this.impls = impls;
3138 }
3139
3140 }
3141
3142 private final class UsesProvidesCompleter implements Completer {
3143 private final ModuleSymbol currentModule;
3144 private final List<InterimUsesDirective> interimUsesCopy;
3145 private final List<InterimProvidesDirective> interimProvidesCopy;
3146
3147 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3148 this.currentModule = currentModule;
3149 this.interimUsesCopy = interimUsesCopy;
3150 this.interimProvidesCopy = interimProvidesCopy;
3151 }
3152
3153 @Override
3154 public void complete(Symbol sym) throws CompletionFailure {
3155 ListBuffer<Directive> directives = new ListBuffer<>();
3156 directives.addAll(currentModule.directives);
3157 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3158 for (InterimUsesDirective interim : interimUsesCopy) {
3159 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3160 uses.add(d);
3161 directives.add(d);
3162 }
3163 currentModule.uses = uses.toList();
3164 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3165 for (InterimProvidesDirective interim : interimProvidesCopy) {
3166 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3167 for (Name impl : interim.impls) {
3168 impls.append(syms.enterClass(currentModule, impl));
3169 }
3170 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3171 impls.toList());
3172 provides.add(d);
3173 directives.add(d);
3174 }
3175 currentModule.provides = provides.toList();
3176 currentModule.directives = directives.toList();
3177 }
3178 }
3179 }