1 /*
2 * Copyright (c) 1999, 2016, 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.util.Arrays;
33 import java.util.EnumSet;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.Map;
37 import java.util.Set;
38
39 import javax.lang.model.element.Modifier;
40 import javax.lang.model.element.NestingKind;
41 import javax.tools.JavaFileManager;
42 import javax.tools.JavaFileObject;
43
44 import com.sun.tools.javac.comp.Annotate;
45 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
46 import com.sun.tools.javac.code.*;
47 import com.sun.tools.javac.code.Directive.*;
48 import com.sun.tools.javac.code.Lint.LintCategory;
49 import com.sun.tools.javac.code.Scope.WriteableScope;
50 import com.sun.tools.javac.code.Symbol.*;
51 import com.sun.tools.javac.code.Symtab;
52 import com.sun.tools.javac.code.Type.*;
53 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
54 import com.sun.tools.javac.file.BaseFileManager;
55 import com.sun.tools.javac.file.PathFileObject;
56 import com.sun.tools.javac.jvm.ClassFile.NameAndType;
57 import com.sun.tools.javac.jvm.ClassFile.Version;
58 import com.sun.tools.javac.main.Option;
59 import com.sun.tools.javac.util.*;
60 import com.sun.tools.javac.util.DefinedBy.Api;
61 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
62
63 import static com.sun.tools.javac.code.Flags.*;
64 import static com.sun.tools.javac.code.Kinds.Kind.*;
65
66 import com.sun.tools.javac.code.Scope.LookupKind;
67
68 import static com.sun.tools.javac.code.TypeTag.ARRAY;
69 import static com.sun.tools.javac.code.TypeTag.CLASS;
70 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
71 import static com.sun.tools.javac.jvm.ClassFile.*;
72 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
73
74 import static com.sun.tools.javac.main.Option.PARAMETERS;
75
76 /** This class provides operations to read a classfile into an internal
77 * representation. The internal representation is anchored in a
78 * ClassSymbol which contains in its scope symbol representations
79 * for all other definitions in the classfile. Top-level Classes themselves
80 * appear as members of the scopes of PackageSymbols.
81 *
82 * <p><b>This is NOT part of any supported API.
83 * If you write code that depends on this, you do so at your own risk.
84 * This code and its internal interfaces are subject to change or
85 * deletion without notice.</b>
86 */
87 public class ClassReader {
88 /** The context key for the class reader. */
89 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
90
91 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
92
93 private final Annotate annotate;
94
95 /** Switch: verbose output.
96 */
97 boolean verbose;
98
99 /** Switch: read constant pool and code sections. This switch is initially
100 * set to false but can be turned on from outside.
101 */
102 public boolean readAllOfClassFile = false;
103
104 /** Switch: allow simplified varargs.
105 */
106 boolean allowSimplifiedVarargs;
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 /** The current scope where type variables are entered.
146 */
147 protected WriteableScope typevars;
148
149 private List<InterimUsesDirective> interimUses = List.nil();
150 private List<InterimProvidesDirective> interimProvides = List.nil();
151
152 /** The path name of the class file currently being read.
153 */
154 protected JavaFileObject currentClassFile = null;
155
156 /** The class or method currently being read.
157 */
158 protected Symbol currentOwner = null;
159
160 /** The module containing the class currently being read.
161 */
162 protected ModuleSymbol currentModule = null;
163
164 /** The buffer containing the currently read class file.
165 */
166 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
167
168 /** The current input pointer.
169 */
170 protected int bp;
171
172 /** The objects of the constant pool.
173 */
174 Object[] poolObj;
175
176 /** For every constant pool entry, an index into buf where the
177 * defining section of the entry is found.
178 */
179 int[] poolIdx;
180
181 /** The major version number of the class file being read. */
182 int majorVersion;
183 /** The minor version number of the class file being read. */
184 int minorVersion;
185
186 /** A table to hold the constant pool indices for method parameter
187 * names, as given in LocalVariableTable attributes.
188 */
189 int[] parameterNameIndices;
190
191 /**
192 * Whether or not any parameter names have been found.
193 */
194 boolean haveParameterNameIndices;
195
196 /** Set this to false every time we start reading a method
197 * and are saving parameter names. Set it to true when we see
198 * MethodParameters, if it's set when we see a LocalVariableTable,
199 * then we ignore the parameter names from the LVT.
200 */
201 boolean sawMethodParameters;
202
203 /**
204 * The set of attribute names for which warnings have been generated for the current class
205 */
206 Set<Name> warnedAttrs = new HashSet<>();
207
208 /**
209 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
210 * @Target
211 */
212 CompoundAnnotationProxy target;
213
214 /**
215 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with
216 * @Repeatable
217 */
218 CompoundAnnotationProxy repeatable;
219
220 /** Get the ClassReader instance for this invocation. */
221 public static ClassReader instance(Context context) {
222 ClassReader instance = context.get(classReaderKey);
223 if (instance == null)
224 instance = new ClassReader(context);
225 return instance;
226 }
227
228 /** Construct a new class reader. */
229 protected ClassReader(Context context) {
230 context.put(classReaderKey, this);
231 annotate = Annotate.instance(context);
232 names = Names.instance(context);
233 syms = Symtab.instance(context);
234 types = Types.instance(context);
235 fileManager = context.get(JavaFileManager.class);
236 if (fileManager == null)
237 throw new AssertionError("FileManager initialization error");
238 diagFactory = JCDiagnostic.Factory.instance(context);
239
240 log = Log.instance(context);
241
242 Options options = Options.instance(context);
243 verbose = options.isSet(Option.VERBOSE);
244
245 Source source = Source.instance(context);
246 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
247 allowModules = source.allowModules();
248
249 saveParameterNames = options.isSet(PARAMETERS);
250
251 profile = Profile.instance(context);
252
253 typevars = WriteableScope.create(syms.noSymbol);
254
255 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
256
257 initAttributeReaders();
258 }
259
260 /** Add member to class unless it is synthetic.
261 */
262 private void enterMember(ClassSymbol c, Symbol sym) {
263 // Synthetic members are not entered -- reason lost to history (optimization?).
264 // Lambda methods must be entered because they may have inner classes (which reference them)
265 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
266 c.members_field.enter(sym);
267 }
268
269 /************************************************************************
270 * Error Diagnoses
271 ***********************************************************************/
272
273 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
274 return new ClassFinder.BadClassFile (
275 currentOwner.enclClass(),
276 currentClassFile,
277 diagFactory.fragment(key, args),
278 diagFactory);
279 }
280
281 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Object... args) {
282 return new ClassFinder.BadEnclosingMethodAttr (
283 currentOwner.enclClass(),
284 currentClassFile,
285 diagFactory.fragment("bad.enclosing.method", args),
286 diagFactory);
287 }
288
289 /************************************************************************
290 * Buffer Access
291 ***********************************************************************/
292
293 /** Read a character.
294 */
295 char nextChar() {
296 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
297 }
298
299 /** Read a byte.
300 */
301 int nextByte() {
302 return buf[bp++] & 0xFF;
303 }
304
305 /** Read an integer.
306 */
307 int nextInt() {
308 return
309 ((buf[bp++] & 0xFF) << 24) +
310 ((buf[bp++] & 0xFF) << 16) +
311 ((buf[bp++] & 0xFF) << 8) +
312 (buf[bp++] & 0xFF);
313 }
314
315 /** Extract a character at position bp from buf.
316 */
317 char getChar(int bp) {
318 return
319 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
320 }
321
322 /** Extract an integer at position bp from buf.
323 */
324 int getInt(int bp) {
325 return
326 ((buf[bp] & 0xFF) << 24) +
327 ((buf[bp+1] & 0xFF) << 16) +
328 ((buf[bp+2] & 0xFF) << 8) +
329 (buf[bp+3] & 0xFF);
330 }
331
332
333 /** Extract a long integer at position bp from buf.
334 */
335 long getLong(int bp) {
336 DataInputStream bufin =
337 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
338 try {
339 return bufin.readLong();
340 } catch (IOException e) {
341 throw new AssertionError(e);
342 }
343 }
344
345 /** Extract a float at position bp from buf.
346 */
347 float getFloat(int bp) {
348 DataInputStream bufin =
349 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
350 try {
351 return bufin.readFloat();
352 } catch (IOException e) {
353 throw new AssertionError(e);
354 }
355 }
356
357 /** Extract a double at position bp from buf.
358 */
359 double getDouble(int bp) {
360 DataInputStream bufin =
361 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
362 try {
363 return bufin.readDouble();
364 } catch (IOException e) {
365 throw new AssertionError(e);
366 }
367 }
368
369 /************************************************************************
370 * Constant Pool Access
371 ***********************************************************************/
372
373 /** Index all constant pool entries, writing their start addresses into
374 * poolIdx.
375 */
376 void indexPool() {
377 poolIdx = new int[nextChar()];
378 poolObj = new Object[poolIdx.length];
379 int i = 1;
380 while (i < poolIdx.length) {
381 poolIdx[i++] = bp;
382 byte tag = buf[bp++];
383 switch (tag) {
384 case CONSTANT_Utf8: case CONSTANT_Unicode: {
385 int len = nextChar();
386 bp = bp + len;
387 break;
388 }
389 case CONSTANT_Class:
390 case CONSTANT_String:
391 case CONSTANT_MethodType:
392 case CONSTANT_Module:
393 case CONSTANT_Package:
394 bp = bp + 2;
395 break;
396 case CONSTANT_MethodHandle:
397 bp = bp + 3;
398 break;
399 case CONSTANT_Fieldref:
400 case CONSTANT_Methodref:
401 case CONSTANT_InterfaceMethodref:
402 case CONSTANT_NameandType:
403 case CONSTANT_Integer:
404 case CONSTANT_Float:
405 case CONSTANT_InvokeDynamic:
406 bp = bp + 4;
407 break;
408 case CONSTANT_Long:
409 case CONSTANT_Double:
410 bp = bp + 8;
411 i++;
412 break;
413 default:
414 throw badClassFile("bad.const.pool.tag.at",
415 Byte.toString(tag),
416 Integer.toString(bp -1));
417 }
418 }
419 }
420
421 /** Read constant pool entry at start address i, use pool as a cache.
422 */
423 Object readPool(int i) {
424 Object result = poolObj[i];
425 if (result != null) return result;
426
427 int index = poolIdx[i];
428 if (index == 0) return null;
429
430 byte tag = buf[index];
431 switch (tag) {
432 case CONSTANT_Utf8:
433 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
434 break;
435 case CONSTANT_Unicode:
436 throw badClassFile("unicode.str.not.supported");
437 case CONSTANT_Class:
438 poolObj[i] = readClassOrType(getChar(index + 1));
439 break;
440 case CONSTANT_String:
441 // FIXME: (footprint) do not use toString here
442 poolObj[i] = readName(getChar(index + 1)).toString();
443 break;
444 case CONSTANT_Fieldref: {
445 ClassSymbol owner = readClassSymbol(getChar(index + 1));
446 NameAndType nt = readNameAndType(getChar(index + 3));
447 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
448 break;
449 }
450 case CONSTANT_Methodref:
451 case CONSTANT_InterfaceMethodref: {
452 ClassSymbol owner = readClassSymbol(getChar(index + 1));
453 NameAndType nt = readNameAndType(getChar(index + 3));
454 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
455 break;
456 }
457 case CONSTANT_NameandType:
458 poolObj[i] = new NameAndType(
459 readName(getChar(index + 1)),
460 readType(getChar(index + 3)), types);
461 break;
462 case CONSTANT_Integer:
463 poolObj[i] = getInt(index + 1);
464 break;
465 case CONSTANT_Float:
466 poolObj[i] = Float.valueOf(getFloat(index + 1));
467 break;
468 case CONSTANT_Long:
469 poolObj[i] = Long.valueOf(getLong(index + 1));
470 break;
471 case CONSTANT_Double:
472 poolObj[i] = Double.valueOf(getDouble(index + 1));
473 break;
474 case CONSTANT_MethodHandle:
475 skipBytes(4);
476 break;
477 case CONSTANT_MethodType:
478 skipBytes(3);
479 break;
480 case CONSTANT_InvokeDynamic:
481 skipBytes(5);
482 break;
483 case CONSTANT_Module:
484 case CONSTANT_Package:
485 // this is temporary for now: treat as a simple reference to the underlying Utf8.
486 poolObj[i] = readName(getChar(index + 1));
487 break;
488 default:
489 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
490 }
491 return poolObj[i];
492 }
493
494 /** Read signature and convert to type.
495 */
496 Type readType(int i) {
497 int index = poolIdx[i];
498 return sigToType(buf, index + 3, getChar(index + 1));
499 }
500
501 /** If name is an array type or class signature, return the
502 * corresponding type; otherwise return a ClassSymbol with given name.
503 */
504 Object readClassOrType(int i) {
505 int index = poolIdx[i];
506 int len = getChar(index + 1);
507 int start = index + 3;
508 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
509 // by the above assertion, the following test can be
510 // simplified to (buf[start] == '[')
511 return (buf[start] == '[' || buf[start + len - 1] == ';')
512 ? (Object)sigToType(buf, start, len)
513 : (Object)enterClass(names.fromUtf(internalize(buf, start,
514 len)));
515 }
516
517 /** Read signature and convert to type parameters.
518 */
519 List<Type> readTypeParams(int i) {
520 int index = poolIdx[i];
521 return sigToTypeParams(buf, index + 3, getChar(index + 1));
522 }
523
524 /** Read class entry.
525 */
526 ClassSymbol readClassSymbol(int i) {
527 Object obj = readPool(i);
528 if (obj != null && !(obj instanceof ClassSymbol))
529 throw badClassFile("bad.const.pool.entry",
530 currentClassFile.toString(),
531 "CONSTANT_Class_info", i);
532 return (ClassSymbol)obj;
533 }
534
535 Name readClassName(int i) {
536 int index = poolIdx[i];
537 if (index == 0) return null;
538 byte tag = buf[index];
539 if (tag != CONSTANT_Class) {
540 throw badClassFile("bad.const.pool.entry",
541 currentClassFile.toString(),
542 "CONSTANT_Class_info", i);
543 }
544 int nameIndex = poolIdx[getChar(index + 1)];
545 int len = getChar(nameIndex + 1);
546 int start = nameIndex + 3;
547 if (buf[start] == '[' || buf[start + len - 1] == ';')
548 throw badClassFile("wrong class name"); //TODO: proper diagnostics
549 return names.fromUtf(internalize(buf, start, len));
550 }
551
552 /** Read name.
553 */
554 Name readName(int i) {
555 Object obj = readPool(i);
556 if (obj != null && !(obj instanceof Name))
557 throw badClassFile("bad.const.pool.entry",
558 currentClassFile.toString(),
559 "CONSTANT_Utf8_info or CONSTANT_String_info", i);
560 return (Name)obj;
561 }
562
563 /** Read name and type.
564 */
565 NameAndType readNameAndType(int i) {
566 Object obj = readPool(i);
567 if (obj != null && !(obj instanceof NameAndType))
568 throw badClassFile("bad.const.pool.entry",
569 currentClassFile.toString(),
570 "CONSTANT_NameAndType_info", i);
571 return (NameAndType)obj;
572 }
573
574 /** Read the name of a module.
575 * The name is stored in a CONSTANT_Module entry, in
576 * JVMS 4.2 binary form (using ".", not "/")
577 */
578 Name readModuleName(int i) {
579 return readName(i);
580 }
581
582 /** Read module_flags.
583 */
584 Set<ModuleFlags> readModuleFlags(int flags) {
585 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
586 for (ModuleFlags f : ModuleFlags.values()) {
587 if ((flags & f.value) != 0)
588 set.add(f);
589 }
590 return set;
591 }
592
593 /** Read resolution_flags.
594 */
595 Set<ModuleResolutionFlags> readModuleResolutionFlags(int flags) {
596 Set<ModuleResolutionFlags> set = EnumSet.noneOf(ModuleResolutionFlags.class);
597 for (ModuleResolutionFlags f : ModuleResolutionFlags.values()) {
598 if ((flags & f.value) != 0)
599 set.add(f);
600 }
601 return set;
602 }
603
604 /** Read exports_flags.
605 */
606 Set<ExportsFlag> readExportsFlags(int flags) {
607 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
608 for (ExportsFlag f: ExportsFlag.values()) {
609 if ((flags & f.value) != 0)
610 set.add(f);
611 }
612 return set;
613 }
614
615 /** Read opens_flags.
616 */
617 Set<OpensFlag> readOpensFlags(int flags) {
618 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
619 for (OpensFlag f: OpensFlag.values()) {
620 if ((flags & f.value) != 0)
621 set.add(f);
622 }
623 return set;
624 }
625
626 /** Read requires_flags.
627 */
628 Set<RequiresFlag> readRequiresFlags(int flags) {
629 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
630 for (RequiresFlag f: RequiresFlag.values()) {
631 if ((flags & f.value) != 0)
632 set.add(f);
633 }
634 return set;
635 }
636
637 /************************************************************************
638 * Reading Types
639 ***********************************************************************/
640
641 /** The unread portion of the currently read type is
642 * signature[sigp..siglimit-1].
643 */
644 byte[] signature;
645 int sigp;
646 int siglimit;
647 boolean sigEnterPhase = false;
648
649 /** Convert signature to type, where signature is a byte array segment.
650 */
651 Type sigToType(byte[] sig, int offset, int len) {
652 signature = sig;
653 sigp = offset;
654 siglimit = offset + len;
655 return sigToType();
656 }
657
658 /** Convert signature to type, where signature is implicit.
659 */
660 Type sigToType() {
661 switch ((char) signature[sigp]) {
662 case 'T':
663 sigp++;
664 int start = sigp;
665 while (signature[sigp] != ';') sigp++;
666 sigp++;
667 return sigEnterPhase
668 ? Type.noType
669 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
670 case '+': {
671 sigp++;
672 Type t = sigToType();
673 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
674 }
675 case '*':
676 sigp++;
677 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
678 syms.boundClass);
679 case '-': {
680 sigp++;
681 Type t = sigToType();
682 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
683 }
684 case 'B':
685 sigp++;
686 return syms.byteType;
687 case 'C':
688 sigp++;
689 return syms.charType;
690 case 'D':
691 sigp++;
692 return syms.doubleType;
693 case 'F':
694 sigp++;
695 return syms.floatType;
696 case 'I':
697 sigp++;
698 return syms.intType;
699 case 'J':
700 sigp++;
701 return syms.longType;
702 case 'L':
703 {
704 // int oldsigp = sigp;
705 Type t = classSigToType();
706 if (sigp < siglimit && signature[sigp] == '.')
707 throw badClassFile("deprecated inner class signature syntax " +
708 "(please recompile from source)");
709 /*
710 System.err.println(" decoded " +
711 new String(signature, oldsigp, sigp-oldsigp) +
712 " => " + t + " outer " + t.outer());
713 */
714 return t;
715 }
716 case 'S':
717 sigp++;
718 return syms.shortType;
719 case 'V':
720 sigp++;
721 return syms.voidType;
722 case 'Z':
723 sigp++;
724 return syms.booleanType;
725 case '[':
726 sigp++;
727 return new ArrayType(sigToType(), syms.arrayClass);
728 case '(':
729 sigp++;
730 List<Type> argtypes = sigToTypes(')');
731 Type restype = sigToType();
732 List<Type> thrown = List.nil();
733 while (signature[sigp] == '^') {
734 sigp++;
735 thrown = thrown.prepend(sigToType());
736 }
737 // if there is a typevar in the throws clause we should state it.
738 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
739 if (l.head.hasTag(TYPEVAR)) {
740 l.head.tsym.flags_field |= THROWS;
741 }
742 }
743 return new MethodType(argtypes,
744 restype,
745 thrown.reverse(),
746 syms.methodClass);
747 case '<':
748 typevars = typevars.dup(currentOwner);
749 Type poly = new ForAll(sigToTypeParams(), sigToType());
750 typevars = typevars.leave();
751 return poly;
752 default:
753 throw badClassFile("bad.signature",
754 Convert.utf2string(signature, sigp, 10));
755 }
756 }
757
758 byte[] signatureBuffer = new byte[0];
759 int sbp = 0;
760 /** Convert class signature to type, where signature is implicit.
761 */
762 Type classSigToType() {
763 if (signature[sigp] != 'L')
764 throw badClassFile("bad.class.signature",
765 Convert.utf2string(signature, sigp, 10));
766 sigp++;
767 Type outer = Type.noType;
768 int startSbp = sbp;
769
770 while (true) {
771 final byte c = signature[sigp++];
772 switch (c) {
773
774 case ';': { // end
775 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
776 startSbp,
777 sbp - startSbp));
778
779 try {
780 return (outer == Type.noType) ?
781 t.erasure(types) :
782 new ClassType(outer, List.<Type>nil(), t);
783 } finally {
784 sbp = startSbp;
785 }
786 }
787
788 case '<': // generic arguments
789 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
790 startSbp,
791 sbp - startSbp));
792 outer = new ClassType(outer, sigToTypes('>'), t) {
793 boolean completed = false;
794 @Override @DefinedBy(Api.LANGUAGE_MODEL)
795 public Type getEnclosingType() {
796 if (!completed) {
797 completed = true;
798 tsym.complete();
799 Type enclosingType = tsym.type.getEnclosingType();
800 if (enclosingType != Type.noType) {
801 List<Type> typeArgs =
802 super.getEnclosingType().allparams();
803 List<Type> typeParams =
804 enclosingType.allparams();
805 if (typeParams.length() != typeArgs.length()) {
806 // no "rare" types
807 super.setEnclosingType(types.erasure(enclosingType));
808 } else {
809 super.setEnclosingType(types.subst(enclosingType,
810 typeParams,
811 typeArgs));
812 }
813 } else {
814 super.setEnclosingType(Type.noType);
815 }
816 }
817 return super.getEnclosingType();
818 }
819 @Override
820 public void setEnclosingType(Type outer) {
821 throw new UnsupportedOperationException();
822 }
823 };
824 switch (signature[sigp++]) {
825 case ';':
826 if (sigp < signature.length && signature[sigp] == '.') {
827 // support old-style GJC signatures
828 // The signature produced was
829 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
830 // rather than say
831 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
832 // so we skip past ".Lfoo/Outer$"
833 sigp += (sbp - startSbp) + // "foo/Outer"
834 3; // ".L" and "$"
835 signatureBuffer[sbp++] = (byte)'$';
836 break;
837 } else {
838 sbp = startSbp;
839 return outer;
840 }
841 case '.':
842 signatureBuffer[sbp++] = (byte)'$';
843 break;
844 default:
845 throw new AssertionError(signature[sigp-1]);
846 }
847 continue;
848
849 case '.':
850 //we have seen an enclosing non-generic class
851 if (outer != Type.noType) {
852 t = enterClass(names.fromUtf(signatureBuffer,
853 startSbp,
854 sbp - startSbp));
855 outer = new ClassType(outer, List.<Type>nil(), t);
856 }
857 signatureBuffer[sbp++] = (byte)'$';
858 continue;
859 case '/':
860 signatureBuffer[sbp++] = (byte)'.';
861 continue;
862 default:
863 signatureBuffer[sbp++] = c;
864 continue;
865 }
866 }
867 }
868
869 /** Convert (implicit) signature to list of types
870 * until `terminator' is encountered.
871 */
872 List<Type> sigToTypes(char terminator) {
873 List<Type> head = List.of(null);
874 List<Type> tail = head;
875 while (signature[sigp] != terminator)
876 tail = tail.setTail(List.of(sigToType()));
877 sigp++;
878 return head.tail;
879 }
880
881 /** Convert signature to type parameters, where signature is a byte
882 * array segment.
883 */
884 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
885 signature = sig;
886 sigp = offset;
887 siglimit = offset + len;
888 return sigToTypeParams();
889 }
890
891 /** Convert signature to type parameters, where signature is implicit.
892 */
893 List<Type> sigToTypeParams() {
894 List<Type> tvars = List.nil();
895 if (signature[sigp] == '<') {
896 sigp++;
897 int start = sigp;
898 sigEnterPhase = true;
899 while (signature[sigp] != '>')
900 tvars = tvars.prepend(sigToTypeParam());
901 sigEnterPhase = false;
902 sigp = start;
903 while (signature[sigp] != '>')
904 sigToTypeParam();
905 sigp++;
906 }
907 return tvars.reverse();
908 }
909
910 /** Convert (implicit) signature to type parameter.
911 */
912 Type sigToTypeParam() {
913 int start = sigp;
914 while (signature[sigp] != ':') sigp++;
915 Name name = names.fromUtf(signature, start, sigp - start);
916 TypeVar tvar;
917 if (sigEnterPhase) {
918 tvar = new TypeVar(name, currentOwner, syms.botType);
919 typevars.enter(tvar.tsym);
920 } else {
921 tvar = (TypeVar)findTypeVar(name);
922 }
923 List<Type> bounds = List.nil();
924 boolean allInterfaces = false;
925 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
926 sigp++;
927 allInterfaces = true;
928 }
929 while (signature[sigp] == ':') {
930 sigp++;
931 bounds = bounds.prepend(sigToType());
932 }
933 if (!sigEnterPhase) {
934 types.setBounds(tvar, bounds.reverse(), allInterfaces);
935 }
936 return tvar;
937 }
938
939 /** Find type variable with given name in `typevars' scope.
940 */
941 Type findTypeVar(Name name) {
942 Symbol s = typevars.findFirst(name);
943 if (s != null) {
944 return s.type;
945 } else {
946 if (readingClassAttr) {
947 // While reading the class attribute, the supertypes
948 // might refer to a type variable from an enclosing element
949 // (method or class).
950 // If the type variable is defined in the enclosing class,
951 // we can actually find it in
952 // currentOwner.owner.type.getTypeArguments()
953 // However, until we have read the enclosing method attribute
954 // we don't know for sure if this owner is correct. It could
955 // be a method and there is no way to tell before reading the
956 // enclosing method attribute.
957 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
958 missingTypeVariables = missingTypeVariables.prepend(t);
959 // System.err.println("Missing type var " + name);
960 return t;
961 }
962 throw badClassFile("undecl.type.var", name);
963 }
964 }
965
966 /************************************************************************
967 * Reading Attributes
968 ***********************************************************************/
969
970 protected enum AttributeKind { CLASS, MEMBER }
971
972 protected abstract class AttributeReader {
973 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
974 this.name = name;
975 this.version = version;
976 this.kinds = kinds;
977 }
978
979 protected boolean accepts(AttributeKind kind) {
980 if (kinds.contains(kind)) {
981 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
982 return true;
983
984 if (lintClassfile && !warnedAttrs.contains(name)) {
985 JavaFileObject prev = log.useSource(currentClassFile);
986 try {
987 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
988 name, version.major, version.minor, majorVersion, minorVersion);
989 } finally {
990 log.useSource(prev);
991 }
992 warnedAttrs.add(name);
993 }
994 }
995 return false;
996 }
997
998 protected abstract void read(Symbol sym, int attrLen);
999
1000 protected final Name name;
1001 protected final ClassFile.Version version;
1002 protected final Set<AttributeKind> kinds;
1003 }
1004
1005 protected Set<AttributeKind> CLASS_ATTRIBUTE =
1006 EnumSet.of(AttributeKind.CLASS);
1007 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
1008 EnumSet.of(AttributeKind.MEMBER);
1009 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
1010 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
1011
1012 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
1013
1014 private void initAttributeReaders() {
1015 AttributeReader[] readers = {
1016 // v45.3 attributes
1017
1018 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
1019 protected void read(Symbol sym, int attrLen) {
1020 if (readAllOfClassFile || saveParameterNames)
1021 ((MethodSymbol)sym).code = readCode(sym);
1022 else
1023 bp = bp + attrLen;
1024 }
1025 },
1026
1027 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
1028 protected void read(Symbol sym, int attrLen) {
1029 Object v = readPool(nextChar());
1030 // Ignore ConstantValue attribute if field not final.
1031 if ((sym.flags() & FINAL) != 0)
1032 ((VarSymbol) sym).setData(v);
1033 }
1034 },
1035
1036 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1037 protected void read(Symbol sym, int attrLen) {
1038 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
1039
1040 s.flags_field |= DEPRECATED;
1041 }
1042 },
1043
1044 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1045 protected void read(Symbol sym, int attrLen) {
1046 int nexceptions = nextChar();
1047 List<Type> thrown = List.nil();
1048 for (int j = 0; j < nexceptions; j++)
1049 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
1050 if (sym.type.getThrownTypes().isEmpty())
1051 sym.type.asMethodType().thrown = thrown.reverse();
1052 }
1053 },
1054
1055 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
1056 protected void read(Symbol sym, int attrLen) {
1057 ClassSymbol c = (ClassSymbol) sym;
1058 if (currentModule.module_info == c) {
1059 //prevent entering the classes too soon:
1060 skipInnerClasses();
1061 } else {
1062 readInnerClasses(c);
1063 }
1064 }
1065 },
1066
1067 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1068 protected void read(Symbol sym, int attrLen) {
1069 int newbp = bp + attrLen;
1070 if (saveParameterNames && !sawMethodParameters) {
1071 // Pick up parameter names from the variable table.
1072 // Parameter names are not explicitly identified as such,
1073 // but all parameter name entries in the LocalVariableTable
1074 // have a start_pc of 0. Therefore, we record the name
1075 // indicies of all slots with a start_pc of zero in the
1076 // parameterNameIndicies array.
1077 // Note that this implicitly honors the JVMS spec that
1078 // there may be more than one LocalVariableTable, and that
1079 // there is no specified ordering for the entries.
1080 int numEntries = nextChar();
1081 for (int i = 0; i < numEntries; i++) {
1082 int start_pc = nextChar();
1083 int length = nextChar();
1084 int nameIndex = nextChar();
1085 int sigIndex = nextChar();
1086 int register = nextChar();
1087 if (start_pc == 0) {
1088 // ensure array large enough
1089 if (register >= parameterNameIndices.length) {
1090 int newSize =
1091 Math.max(register + 1, parameterNameIndices.length + 8);
1092 parameterNameIndices =
1093 Arrays.copyOf(parameterNameIndices, newSize);
1094 }
1095 parameterNameIndices[register] = nameIndex;
1096 haveParameterNameIndices = true;
1097 }
1098 }
1099 }
1100 bp = newbp;
1101 }
1102 },
1103
1104 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1105 protected void read(Symbol sym, int attrLen) {
1106 ClassSymbol c = (ClassSymbol) sym;
1107 Name n = readName(nextChar());
1108 c.sourcefile = new SourceFileObject(n, c.flatname);
1109 // If the class is a toplevel class, originating from a Java source file,
1110 // but the class name does not match the file name, then it is
1111 // an auxiliary class.
1112 String sn = n.toString();
1113 if (c.owner.kind == PCK &&
1114 sn.endsWith(".java") &&
1115 !sn.equals(c.name.toString()+".java")) {
1116 c.flags_field |= AUXILIARY;
1117 }
1118 }
1119 },
1120
1121 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1122 protected void read(Symbol sym, int attrLen) {
1123 sym.flags_field |= SYNTHETIC;
1124 }
1125 },
1126
1127 // standard v49 attributes
1128
1129 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1130 protected void read(Symbol sym, int attrLen) {
1131 int newbp = bp + attrLen;
1132 readEnclosingMethodAttr(sym);
1133 bp = newbp;
1134 }
1135 },
1136
1137 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1138 protected void read(Symbol sym, int attrLen) {
1139 if (sym.kind == TYP) {
1140 ClassSymbol c = (ClassSymbol) sym;
1141 readingClassAttr = true;
1142 try {
1143 ClassType ct1 = (ClassType)c.type;
1144 Assert.check(c == currentOwner);
1145 ct1.typarams_field = readTypeParams(nextChar());
1146 ct1.supertype_field = sigToType();
1147 ListBuffer<Type> is = new ListBuffer<>();
1148 while (sigp != siglimit) is.append(sigToType());
1149 ct1.interfaces_field = is.toList();
1150 } finally {
1151 readingClassAttr = false;
1152 }
1153 } else {
1154 List<Type> thrown = sym.type.getThrownTypes();
1155 sym.type = readType(nextChar());
1156 //- System.err.println(" # " + sym.type);
1157 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1158 sym.type.asMethodType().thrown = thrown;
1159
1160 }
1161 }
1162 },
1163
1164 // v49 annotation attributes
1165
1166 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1167 protected void read(Symbol sym, int attrLen) {
1168 attachAnnotationDefault(sym);
1169 }
1170 },
1171
1172 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1173 protected void read(Symbol sym, int attrLen) {
1174 attachAnnotations(sym);
1175 }
1176 },
1177
1178 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1179 protected void read(Symbol sym, int attrLen) {
1180 attachParameterAnnotations(sym);
1181 }
1182 },
1183
1184 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1185 protected void read(Symbol sym, int attrLen) {
1186 attachAnnotations(sym);
1187 }
1188 },
1189
1190 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1191 protected void read(Symbol sym, int attrLen) {
1192 attachParameterAnnotations(sym);
1193 }
1194 },
1195
1196 // additional "legacy" v49 attributes, superceded by flags
1197
1198 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1199 protected void read(Symbol sym, int attrLen) {
1200 sym.flags_field |= ANNOTATION;
1201 }
1202 },
1203
1204 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1205 protected void read(Symbol sym, int attrLen) {
1206 sym.flags_field |= BRIDGE;
1207 }
1208 },
1209
1210 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1211 protected void read(Symbol sym, int attrLen) {
1212 sym.flags_field |= ENUM;
1213 }
1214 },
1215
1216 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1217 protected void read(Symbol sym, int attrLen) {
1218 sym.flags_field |= VARARGS;
1219 }
1220 },
1221
1222 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1223 protected void read(Symbol sym, int attrLen) {
1224 attachTypeAnnotations(sym);
1225 }
1226 },
1227
1228 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1229 protected void read(Symbol sym, int attrLen) {
1230 attachTypeAnnotations(sym);
1231 }
1232 },
1233
1234 // The following attributes for a Code attribute are not currently handled
1235 // StackMapTable
1236 // SourceDebugExtension
1237 // LineNumberTable
1238 // LocalVariableTypeTable
1239
1240 // standard v52 attributes
1241
1242 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1243 protected void read(Symbol sym, int attrlen) {
1244 int newbp = bp + attrlen;
1245 if (saveParameterNames) {
1246 sawMethodParameters = true;
1247 int numEntries = nextByte();
1248 parameterNameIndices = new int[numEntries];
1249 haveParameterNameIndices = true;
1250 for (int i = 0; i < numEntries; i++) {
1251 int nameIndex = nextChar();
1252 int flags = nextChar();
1253 parameterNameIndices[i] = nameIndex;
1254 }
1255 }
1256 bp = newbp;
1257 }
1258 },
1259
1260 // standard v53 attributes
1261
1262 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1263 @Override
1264 protected boolean accepts(AttributeKind kind) {
1265 return super.accepts(kind) && allowModules;
1266 }
1267 protected void read(Symbol sym, int attrLen) {
1268 if (sym.kind == TYP && sym.owner.kind == MDL) {
1269 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1270 ListBuffer<Directive> directives = new ListBuffer<>();
1271
1272 Name moduleName = readModuleName(nextChar());
1273 if (currentModule.name != moduleName) {
1274 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1275 }
1276
1277 msym.flags.addAll(readModuleFlags(nextChar()));
1278 msym.version = readName(nextChar());
1279
1280 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1281 int nrequires = nextChar();
1282 for (int i = 0; i < nrequires; i++) {
1283 ModuleSymbol rsym = syms.enterModule(readModuleName(nextChar()));
1284 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1285 nextChar(); // skip compiled version
1286 requires.add(new RequiresDirective(rsym, flags));
1287 }
1288 msym.requires = requires.toList();
1289 directives.addAll(msym.requires);
1290
1291 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1292 int nexports = nextChar();
1293 for (int i = 0; i < nexports; i++) {
1294 Name n = readName(nextChar());
1295 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n)));
1296 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1297 int nto = nextChar();
1298 List<ModuleSymbol> to;
1299 if (nto == 0) {
1300 to = null;
1301 } else {
1302 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1303 for (int t = 0; t < nto; t++)
1304 lb.append(syms.enterModule(readModuleName(nextChar())));
1305 to = lb.toList();
1306 }
1307 exports.add(new ExportsDirective(p, to, flags));
1308 }
1309 msym.exports = exports.toList();
1310 directives.addAll(msym.exports);
1311 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1312 int nopens = nextChar();
1313 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1314 throw badClassFile("module.non.zero.opens", currentModule.name);
1315 }
1316 for (int i = 0; i < nopens; i++) {
1317 Name n = readName(nextChar());
1318 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n)));
1319 Set<OpensFlag> flags = readOpensFlags(nextChar());
1320 int nto = nextChar();
1321 List<ModuleSymbol> to;
1322 if (nto == 0) {
1323 to = null;
1324 } else {
1325 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1326 for (int t = 0; t < nto; t++)
1327 lb.append(syms.enterModule(readModuleName(nextChar())));
1328 to = lb.toList();
1329 }
1330 opens.add(new OpensDirective(p, to, flags));
1331 }
1332 msym.opens = opens.toList();
1333 directives.addAll(msym.opens);
1334
1335 msym.directives = directives.toList();
1336
1337 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1338 int nuses = nextChar();
1339 for (int i = 0; i < nuses; i++) {
1340 Name srvc = readClassName(nextChar());
1341 uses.add(new InterimUsesDirective(srvc));
1342 }
1343 interimUses = uses.toList();
1344
1345 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1346 int nprovides = nextChar();
1347 for (int p = 0; p < nprovides; p++) {
1348 Name srvc = readClassName(nextChar());
1349 int nimpls = nextChar();
1350 ListBuffer<Name> impls = new ListBuffer<>();
1351 for (int i = 0; i < nimpls; i++) {
1352 impls.append(readClassName(nextChar()));
1353 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1354 }
1355 }
1356 interimProvides = provides.toList();
1357 }
1358 }
1359 },
1360
1361 new AttributeReader(names.ModuleResolution, V53, CLASS_ATTRIBUTE) {
1362 @Override
1363 protected boolean accepts(AttributeKind kind) {
1364 return super.accepts(kind) && allowModules;
1365 }
1366 protected void read(Symbol sym, int attrLen) {
1367 if (sym.kind == TYP && sym.owner.kind == MDL) {
1368 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1369 msym.resolutionFlags.addAll(readModuleResolutionFlags(nextChar()));
1370 }
1371 }
1372 },
1373 };
1374
1375 for (AttributeReader r: readers)
1376 attributeReaders.put(r.name, r);
1377 }
1378
1379 protected void readEnclosingMethodAttr(Symbol sym) {
1380 // sym is a nested class with an "Enclosing Method" attribute
1381 // remove sym from it's current owners scope and place it in
1382 // the scope specified by the attribute
1383 sym.owner.members().remove(sym);
1384 ClassSymbol self = (ClassSymbol)sym;
1385 ClassSymbol c = readClassSymbol(nextChar());
1386 NameAndType nt = readNameAndType(nextChar());
1387
1388 if (c.members_field == null)
1389 throw badClassFile("bad.enclosing.class", self, c);
1390
1391 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1392 if (nt != null && m == null)
1393 throw badEnclosingMethod(self);
1394
1395 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1396 self.owner = m != null ? m : c;
1397 if (self.name.isEmpty())
1398 self.fullname = names.empty;
1399 else
1400 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1401
1402 if (m != null) {
1403 ((ClassType)sym.type).setEnclosingType(m.type);
1404 } else if ((self.flags_field & STATIC) == 0) {
1405 ((ClassType)sym.type).setEnclosingType(c.type);
1406 } else {
1407 ((ClassType)sym.type).setEnclosingType(Type.noType);
1408 }
1409 enterTypevars(self, self.type);
1410 if (!missingTypeVariables.isEmpty()) {
1411 ListBuffer<Type> typeVars = new ListBuffer<>();
1412 for (Type typevar : missingTypeVariables) {
1413 typeVars.append(findTypeVar(typevar.tsym.name));
1414 }
1415 foundTypeVariables = typeVars.toList();
1416 } else {
1417 foundTypeVariables = List.nil();
1418 }
1419 }
1420
1421 // See java.lang.Class
1422 private Name simpleBinaryName(Name self, Name enclosing) {
1423 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1424 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1425 throw badClassFile("bad.enclosing.method", self);
1426 int index = 1;
1427 while (index < simpleBinaryName.length() &&
1428 isAsciiDigit(simpleBinaryName.charAt(index)))
1429 index++;
1430 return names.fromString(simpleBinaryName.substring(index));
1431 }
1432
1433 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1434 if (nt == null)
1435 return null;
1436
1437 MethodType type = nt.uniqueType.type.asMethodType();
1438
1439 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1440 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1441 return (MethodSymbol)sym;
1442 }
1443
1444 if (nt.name != names.init)
1445 // not a constructor
1446 return null;
1447 if ((flags & INTERFACE) != 0)
1448 // no enclosing instance
1449 return null;
1450 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1451 // no parameters
1452 return null;
1453
1454 // A constructor of an inner class.
1455 // Remove the first argument (the enclosing instance)
1456 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1457 nt.uniqueType.type.getReturnType(),
1458 nt.uniqueType.type.getThrownTypes(),
1459 syms.methodClass));
1460 // Try searching again
1461 return findMethod(nt, scope, flags);
1462 }
1463
1464 /** Similar to Types.isSameType but avoids completion */
1465 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1466 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1467 .prepend(types.erasure(mt1.getReturnType()));
1468 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1469 while (!types1.isEmpty() && !types2.isEmpty()) {
1470 if (types1.head.tsym != types2.head.tsym)
1471 return false;
1472 types1 = types1.tail;
1473 types2 = types2.tail;
1474 }
1475 return types1.isEmpty() && types2.isEmpty();
1476 }
1477
1478 /**
1479 * Character.isDigit answers <tt>true</tt> to some non-ascii
1480 * digits. This one does not. <b>copied from java.lang.Class</b>
1481 */
1482 private static boolean isAsciiDigit(char c) {
1483 return '0' <= c && c <= '9';
1484 }
1485
1486 /** Read member attributes.
1487 */
1488 void readMemberAttrs(Symbol sym) {
1489 readAttrs(sym, AttributeKind.MEMBER);
1490 }
1491
1492 void readAttrs(Symbol sym, AttributeKind kind) {
1493 char ac = nextChar();
1494 for (int i = 0; i < ac; i++) {
1495 Name attrName = readName(nextChar());
1496 int attrLen = nextInt();
1497 AttributeReader r = attributeReaders.get(attrName);
1498 if (r != null && r.accepts(kind))
1499 r.read(sym, attrLen);
1500 else {
1501 bp = bp + attrLen;
1502 }
1503 }
1504 }
1505
1506 private boolean readingClassAttr = false;
1507 private List<Type> missingTypeVariables = List.nil();
1508 private List<Type> foundTypeVariables = List.nil();
1509
1510 /** Read class attributes.
1511 */
1512 void readClassAttrs(ClassSymbol c) {
1513 readAttrs(c, AttributeKind.CLASS);
1514 }
1515
1516 /** Read code block.
1517 */
1518 Code readCode(Symbol owner) {
1519 nextChar(); // max_stack
1520 nextChar(); // max_locals
1521 final int code_length = nextInt();
1522 bp += code_length;
1523 final char exception_table_length = nextChar();
1524 bp += exception_table_length * 8;
1525 readMemberAttrs(owner);
1526 return null;
1527 }
1528
1529 /************************************************************************
1530 * Reading Java-language annotations
1531 ***********************************************************************/
1532
1533 /** Attach annotations.
1534 */
1535 void attachAnnotations(final Symbol sym) {
1536 int numAttributes = nextChar();
1537 if (numAttributes != 0) {
1538 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1539 for (int i = 0; i<numAttributes; i++) {
1540 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1541 if (proxy.type.tsym == syms.proprietaryType.tsym)
1542 sym.flags_field |= PROPRIETARY;
1543 else if (proxy.type.tsym == syms.profileType.tsym) {
1544 if (profile != Profile.DEFAULT) {
1545 for (Pair<Name,Attribute> v: proxy.values) {
1546 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1547 Attribute.Constant c = (Attribute.Constant) v.snd;
1548 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1549 sym.flags_field |= NOT_IN_PROFILE;
1550 }
1551 }
1552 }
1553 }
1554 } else {
1555 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1556 target = proxy;
1557 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1558 repeatable = proxy;
1559 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1560 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1561 for (Pair<Name, Attribute> v : proxy.values) {
1562 if (v.fst == names.forRemoval && v.snd instanceof Attribute.Constant) {
1563 Attribute.Constant c = (Attribute.Constant) v.snd;
1564 if (c.type == syms.booleanType && ((Integer) c.value) != 0) {
1565 sym.flags_field |= DEPRECATED_REMOVAL;
1566 }
1567 }
1568 }
1569 }
1570
1571 proxies.append(proxy);
1572 }
1573 }
1574 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1575 }
1576 }
1577
1578 /** Attach parameter annotations.
1579 */
1580 void attachParameterAnnotations(final Symbol method) {
1581 final MethodSymbol meth = (MethodSymbol)method;
1582 int numParameters = buf[bp++] & 0xFF;
1583 List<VarSymbol> parameters = meth.params();
1584 int pnum = 0;
1585 while (parameters.tail != null) {
1586 attachAnnotations(parameters.head);
1587 parameters = parameters.tail;
1588 pnum++;
1589 }
1590 if (pnum != numParameters) {
1591 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1592 }
1593 }
1594
1595 void attachTypeAnnotations(final Symbol sym) {
1596 int numAttributes = nextChar();
1597 if (numAttributes != 0) {
1598 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1599 for (int i = 0; i < numAttributes; i++)
1600 proxies.append(readTypeAnnotation());
1601 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1602 }
1603 }
1604
1605 /** Attach the default value for an annotation element.
1606 */
1607 void attachAnnotationDefault(final Symbol sym) {
1608 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1609 final Attribute value = readAttributeValue();
1610
1611 // The default value is set later during annotation. It might
1612 // be the case that the Symbol sym is annotated _after_ the
1613 // repeating instances that depend on this default value,
1614 // because of this we set an interim value that tells us this
1615 // element (most likely) has a default.
1616 //
1617 // Set interim value for now, reset just before we do this
1618 // properly at annotate time.
1619 meth.defaultValue = value;
1620 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1621 }
1622
1623 Type readTypeOrClassSymbol(int i) {
1624 // support preliminary jsr175-format class files
1625 if (buf[poolIdx[i]] == CONSTANT_Class)
1626 return readClassSymbol(i).type;
1627 return readTypeToProxy(i);
1628 }
1629 Type readEnumType(int i) {
1630 // support preliminary jsr175-format class files
1631 int index = poolIdx[i];
1632 int length = getChar(index + 1);
1633 if (buf[index + length + 2] != ';')
1634 return enterClass(readName(i)).type;
1635 return readTypeToProxy(i);
1636 }
1637 Type readTypeToProxy(int i) {
1638 if (currentModule.module_info == currentOwner) {
1639 int index = poolIdx[i];
1640 return new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1)));
1641 } else {
1642 return readType(i);
1643 }
1644 }
1645
1646 CompoundAnnotationProxy readCompoundAnnotation() {
1647 Type t;
1648 if (currentModule.module_info == currentOwner) {
1649 int index = poolIdx[nextChar()];
1650 t = new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1)));
1651 } else {
1652 t = readTypeOrClassSymbol(nextChar());
1653 }
1654 int numFields = nextChar();
1655 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1656 for (int i=0; i<numFields; i++) {
1657 Name name = readName(nextChar());
1658 Attribute value = readAttributeValue();
1659 pairs.append(new Pair<>(name, value));
1660 }
1661 return new CompoundAnnotationProxy(t, pairs.toList());
1662 }
1663
1664 TypeAnnotationProxy readTypeAnnotation() {
1665 TypeAnnotationPosition position = readPosition();
1666 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1667
1668 return new TypeAnnotationProxy(proxy, position);
1669 }
1670
1671 TypeAnnotationPosition readPosition() {
1672 int tag = nextByte(); // TargetType tag is a byte
1673
1674 if (!TargetType.isValidTargetTypeValue(tag))
1675 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1676
1677 TargetType type = TargetType.fromTargetTypeValue(tag);
1678
1679 switch (type) {
1680 // instanceof
1681 case INSTANCEOF: {
1682 final int offset = nextChar();
1683 final TypeAnnotationPosition position =
1684 TypeAnnotationPosition.instanceOf(readTypePath());
1685 position.offset = offset;
1686 return position;
1687 }
1688 // new expression
1689 case NEW: {
1690 final int offset = nextChar();
1691 final TypeAnnotationPosition position =
1692 TypeAnnotationPosition.newObj(readTypePath());
1693 position.offset = offset;
1694 return position;
1695 }
1696 // constructor/method reference receiver
1697 case CONSTRUCTOR_REFERENCE: {
1698 final int offset = nextChar();
1699 final TypeAnnotationPosition position =
1700 TypeAnnotationPosition.constructorRef(readTypePath());
1701 position.offset = offset;
1702 return position;
1703 }
1704 case METHOD_REFERENCE: {
1705 final int offset = nextChar();
1706 final TypeAnnotationPosition position =
1707 TypeAnnotationPosition.methodRef(readTypePath());
1708 position.offset = offset;
1709 return position;
1710 }
1711 // local variable
1712 case LOCAL_VARIABLE: {
1713 final int table_length = nextChar();
1714 final int[] newLvarOffset = new int[table_length];
1715 final int[] newLvarLength = new int[table_length];
1716 final int[] newLvarIndex = new int[table_length];
1717
1718 for (int i = 0; i < table_length; ++i) {
1719 newLvarOffset[i] = nextChar();
1720 newLvarLength[i] = nextChar();
1721 newLvarIndex[i] = nextChar();
1722 }
1723
1724 final TypeAnnotationPosition position =
1725 TypeAnnotationPosition.localVariable(readTypePath());
1726 position.lvarOffset = newLvarOffset;
1727 position.lvarLength = newLvarLength;
1728 position.lvarIndex = newLvarIndex;
1729 return position;
1730 }
1731 // resource variable
1732 case RESOURCE_VARIABLE: {
1733 final int table_length = nextChar();
1734 final int[] newLvarOffset = new int[table_length];
1735 final int[] newLvarLength = new int[table_length];
1736 final int[] newLvarIndex = new int[table_length];
1737
1738 for (int i = 0; i < table_length; ++i) {
1739 newLvarOffset[i] = nextChar();
1740 newLvarLength[i] = nextChar();
1741 newLvarIndex[i] = nextChar();
1742 }
1743
1744 final TypeAnnotationPosition position =
1745 TypeAnnotationPosition.resourceVariable(readTypePath());
1746 position.lvarOffset = newLvarOffset;
1747 position.lvarLength = newLvarLength;
1748 position.lvarIndex = newLvarIndex;
1749 return position;
1750 }
1751 // exception parameter
1752 case EXCEPTION_PARAMETER: {
1753 final int exception_index = nextChar();
1754 final TypeAnnotationPosition position =
1755 TypeAnnotationPosition.exceptionParameter(readTypePath());
1756 position.setExceptionIndex(exception_index);
1757 return position;
1758 }
1759 // method receiver
1760 case METHOD_RECEIVER:
1761 return TypeAnnotationPosition.methodReceiver(readTypePath());
1762 // type parameter
1763 case CLASS_TYPE_PARAMETER: {
1764 final int parameter_index = nextByte();
1765 return TypeAnnotationPosition
1766 .typeParameter(readTypePath(), parameter_index);
1767 }
1768 case METHOD_TYPE_PARAMETER: {
1769 final int parameter_index = nextByte();
1770 return TypeAnnotationPosition
1771 .methodTypeParameter(readTypePath(), parameter_index);
1772 }
1773 // type parameter bound
1774 case CLASS_TYPE_PARAMETER_BOUND: {
1775 final int parameter_index = nextByte();
1776 final int bound_index = nextByte();
1777 return TypeAnnotationPosition
1778 .typeParameterBound(readTypePath(), parameter_index,
1779 bound_index);
1780 }
1781 case METHOD_TYPE_PARAMETER_BOUND: {
1782 final int parameter_index = nextByte();
1783 final int bound_index = nextByte();
1784 return TypeAnnotationPosition
1785 .methodTypeParameterBound(readTypePath(), parameter_index,
1786 bound_index);
1787 }
1788 // class extends or implements clause
1789 case CLASS_EXTENDS: {
1790 final int type_index = nextChar();
1791 return TypeAnnotationPosition.classExtends(readTypePath(),
1792 type_index);
1793 }
1794 // throws
1795 case THROWS: {
1796 final int type_index = nextChar();
1797 return TypeAnnotationPosition.methodThrows(readTypePath(),
1798 type_index);
1799 }
1800 // method parameter
1801 case METHOD_FORMAL_PARAMETER: {
1802 final int parameter_index = nextByte();
1803 return TypeAnnotationPosition.methodParameter(readTypePath(),
1804 parameter_index);
1805 }
1806 // type cast
1807 case CAST: {
1808 final int offset = nextChar();
1809 final int type_index = nextByte();
1810 final TypeAnnotationPosition position =
1811 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1812 position.offset = offset;
1813 return position;
1814 }
1815 // method/constructor/reference type argument
1816 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1817 final int offset = nextChar();
1818 final int type_index = nextByte();
1819 final TypeAnnotationPosition position = TypeAnnotationPosition
1820 .constructorInvocationTypeArg(readTypePath(), type_index);
1821 position.offset = offset;
1822 return position;
1823 }
1824 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1825 final int offset = nextChar();
1826 final int type_index = nextByte();
1827 final TypeAnnotationPosition position = TypeAnnotationPosition
1828 .methodInvocationTypeArg(readTypePath(), type_index);
1829 position.offset = offset;
1830 return position;
1831 }
1832 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1833 final int offset = nextChar();
1834 final int type_index = nextByte();
1835 final TypeAnnotationPosition position = TypeAnnotationPosition
1836 .constructorRefTypeArg(readTypePath(), type_index);
1837 position.offset = offset;
1838 return position;
1839 }
1840 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1841 final int offset = nextChar();
1842 final int type_index = nextByte();
1843 final TypeAnnotationPosition position = TypeAnnotationPosition
1844 .methodRefTypeArg(readTypePath(), type_index);
1845 position.offset = offset;
1846 return position;
1847 }
1848 // We don't need to worry about these
1849 case METHOD_RETURN:
1850 return TypeAnnotationPosition.methodReturn(readTypePath());
1851 case FIELD:
1852 return TypeAnnotationPosition.field(readTypePath());
1853 case UNKNOWN:
1854 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1855 default:
1856 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1857 }
1858 }
1859
1860 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1861 int len = nextByte();
1862 ListBuffer<Integer> loc = new ListBuffer<>();
1863 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1864 loc = loc.append(nextByte());
1865
1866 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1867
1868 }
1869
1870 Attribute readAttributeValue() {
1871 char c = (char) buf[bp++];
1872 switch (c) {
1873 case 'B':
1874 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1875 case 'C':
1876 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1877 case 'D':
1878 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1879 case 'F':
1880 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1881 case 'I':
1882 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1883 case 'J':
1884 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1885 case 'S':
1886 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1887 case 'Z':
1888 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1889 case 's':
1890 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1891 case 'e':
1892 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1893 case 'c':
1894 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1895 case '[': {
1896 int n = nextChar();
1897 ListBuffer<Attribute> l = new ListBuffer<>();
1898 for (int i=0; i<n; i++)
1899 l.append(readAttributeValue());
1900 return new ArrayAttributeProxy(l.toList());
1901 }
1902 case '@':
1903 return readCompoundAnnotation();
1904 default:
1905 throw new AssertionError("unknown annotation tag '" + c + "'");
1906 }
1907 }
1908
1909 interface ProxyVisitor extends Attribute.Visitor {
1910 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1911 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1912 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1913 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1914 }
1915
1916 static class EnumAttributeProxy extends Attribute {
1917 Type enumType;
1918 Name enumerator;
1919 public EnumAttributeProxy(Type enumType, Name enumerator) {
1920 super(null);
1921 this.enumType = enumType;
1922 this.enumerator = enumerator;
1923 }
1924 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1925 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1926 public String toString() {
1927 return "/*proxy enum*/" + enumType + "." + enumerator;
1928 }
1929 }
1930
1931 static class ClassAttributeProxy extends Attribute {
1932 Type classType;
1933 public ClassAttributeProxy(Type classType) {
1934 super(null);
1935 this.classType = classType;
1936 }
1937 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1938 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1939 public String toString() {
1940 return "/*proxy class*/" + classType + ".class";
1941 }
1942 }
1943
1944 static class ArrayAttributeProxy extends Attribute {
1945 List<Attribute> values;
1946 ArrayAttributeProxy(List<Attribute> values) {
1947 super(null);
1948 this.values = values;
1949 }
1950 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1951 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1952 public String toString() {
1953 return "{" + values + "}";
1954 }
1955 }
1956
1957 /** A temporary proxy representing a compound attribute.
1958 */
1959 static class CompoundAnnotationProxy extends Attribute {
1960 final List<Pair<Name,Attribute>> values;
1961 public CompoundAnnotationProxy(Type type,
1962 List<Pair<Name,Attribute>> values) {
1963 super(type);
1964 this.values = values;
1965 }
1966 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1967 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1968 public String toString() {
1969 StringBuilder buf = new StringBuilder();
1970 buf.append("@");
1971 buf.append(type.tsym.getQualifiedName());
1972 buf.append("/*proxy*/{");
1973 boolean first = true;
1974 for (List<Pair<Name,Attribute>> v = values;
1975 v.nonEmpty(); v = v.tail) {
1976 Pair<Name,Attribute> value = v.head;
1977 if (!first) buf.append(",");
1978 first = false;
1979 buf.append(value.fst);
1980 buf.append("=");
1981 buf.append(value.snd);
1982 }
1983 buf.append("}");
1984 return buf.toString();
1985 }
1986 }
1987
1988 /** A temporary proxy representing a type annotation.
1989 */
1990 static class TypeAnnotationProxy {
1991 final CompoundAnnotationProxy compound;
1992 final TypeAnnotationPosition position;
1993 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1994 TypeAnnotationPosition position) {
1995 this.compound = compound;
1996 this.position = position;
1997 }
1998 }
1999
2000 class AnnotationDeproxy implements ProxyVisitor {
2001 private ClassSymbol requestingOwner;
2002
2003 AnnotationDeproxy(ClassSymbol owner) {
2004 this.requestingOwner = owner;
2005 }
2006
2007 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2008 // also must fill in types!!!!
2009 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2010 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2011 buf.append(deproxyCompound(l.head));
2012 }
2013 return buf.toList();
2014 }
2015
2016 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2017 Type annotationType = resolvePossibleProxyType(a.type);
2018 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2019 for (List<Pair<Name,Attribute>> l = a.values;
2020 l.nonEmpty();
2021 l = l.tail) {
2022 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2023 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2024 }
2025 return new Attribute.Compound(annotationType, buf.toList());
2026 }
2027
2028 MethodSymbol findAccessMethod(Type container, Name name) {
2029 CompletionFailure failure = null;
2030 try {
2031 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2032 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2033 return (MethodSymbol) sym;
2034 }
2035 } catch (CompletionFailure ex) {
2036 failure = ex;
2037 }
2038 // The method wasn't found: emit a warning and recover
2039 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2040 try {
2041 if (lintClassfile) {
2042 if (failure == null) {
2043 log.warning("annotation.method.not.found",
2044 container,
2045 name);
2046 } else {
2047 log.warning("annotation.method.not.found.reason",
2048 container,
2049 name,
2050 failure.getDetailValue());//diagnostic, if present
2051 }
2052 }
2053 } finally {
2054 log.useSource(prevSource);
2055 }
2056 // Construct a new method type and symbol. Use bottom
2057 // type (typeof null) as return type because this type is
2058 // a subtype of all reference types and can be converted
2059 // to primitive types by unboxing.
2060 MethodType mt = new MethodType(List.<Type>nil(),
2061 syms.botType,
2062 List.<Type>nil(),
2063 syms.methodClass);
2064 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2065 }
2066
2067 Attribute result;
2068 Type type;
2069 Attribute deproxy(Type t, Attribute a) {
2070 Type oldType = type;
2071 try {
2072 type = t;
2073 a.accept(this);
2074 return result;
2075 } finally {
2076 type = oldType;
2077 }
2078 }
2079
2080 // implement Attribute.Visitor below
2081
2082 public void visitConstant(Attribute.Constant value) {
2083 // assert value.type == type;
2084 result = value;
2085 }
2086
2087 public void visitClass(Attribute.Class clazz) {
2088 result = clazz;
2089 }
2090
2091 public void visitEnum(Attribute.Enum e) {
2092 throw new AssertionError(); // shouldn't happen
2093 }
2094
2095 public void visitCompound(Attribute.Compound compound) {
2096 throw new AssertionError(); // shouldn't happen
2097 }
2098
2099 public void visitArray(Attribute.Array array) {
2100 throw new AssertionError(); // shouldn't happen
2101 }
2102
2103 public void visitError(Attribute.Error e) {
2104 throw new AssertionError(); // shouldn't happen
2105 }
2106
2107 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2108 // type.tsym.flatName() should == proxy.enumFlatName
2109 Type enumType = resolvePossibleProxyType(proxy.enumType);
2110 TypeSymbol enumTypeSym = enumType.tsym;
2111 VarSymbol enumerator = null;
2112 CompletionFailure failure = null;
2113 try {
2114 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2115 if (sym.kind == VAR) {
2116 enumerator = (VarSymbol)sym;
2117 break;
2118 }
2119 }
2120 }
2121 catch (CompletionFailure ex) {
2122 failure = ex;
2123 }
2124 if (enumerator == null) {
2125 if (failure != null) {
2126 log.warning("unknown.enum.constant.reason",
2127 currentClassFile, enumTypeSym, proxy.enumerator,
2128 failure.getDiagnostic());
2129 } else {
2130 log.warning("unknown.enum.constant",
2131 currentClassFile, enumTypeSym, proxy.enumerator);
2132 }
2133 result = new Attribute.Enum(enumTypeSym.type,
2134 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2135 } else {
2136 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2137 }
2138 }
2139
2140 @Override
2141 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2142 Type classType = resolvePossibleProxyType(proxy.classType);
2143 result = new Attribute.Class(types, classType);
2144 }
2145
2146 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2147 int length = proxy.values.length();
2148 Attribute[] ats = new Attribute[length];
2149 Type elemtype = types.elemtype(type);
2150 int i = 0;
2151 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2152 ats[i++] = deproxy(elemtype, p.head);
2153 }
2154 result = new Attribute.Array(type, ats);
2155 }
2156
2157 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2158 result = deproxyCompound(proxy);
2159 }
2160
2161 Type resolvePossibleProxyType(Type t) {
2162 if (t instanceof ProxyType) {
2163 Assert.check(requestingOwner.owner.kind == MDL);
2164 ModuleSymbol prevCurrentModule = currentModule;
2165 currentModule = (ModuleSymbol) requestingOwner.owner;
2166 try {
2167 return ((ProxyType) t).resolve();
2168 } finally {
2169 currentModule = prevCurrentModule;
2170 }
2171 } else {
2172 return t;
2173 }
2174 }
2175 }
2176
2177 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2178 final MethodSymbol sym;
2179 final Attribute value;
2180 final JavaFileObject classFile = currentClassFile;
2181
2182 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2183 super(currentOwner.kind == MTH
2184 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2185 this.sym = sym;
2186 this.value = value;
2187 }
2188
2189 @Override
2190 public void run() {
2191 JavaFileObject previousClassFile = currentClassFile;
2192 try {
2193 // Reset the interim value set earlier in
2194 // attachAnnotationDefault().
2195 sym.defaultValue = null;
2196 currentClassFile = classFile;
2197 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2198 } finally {
2199 currentClassFile = previousClassFile;
2200 }
2201 }
2202
2203 @Override
2204 public String toString() {
2205 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2206 }
2207 }
2208
2209 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2210 final Symbol sym;
2211 final List<CompoundAnnotationProxy> l;
2212 final JavaFileObject classFile;
2213
2214 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2215 super(currentOwner.kind == MTH
2216 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2217 if (sym.kind == TYP && sym.owner.kind == MDL) {
2218 this.sym = sym.owner;
2219 } else {
2220 this.sym = sym;
2221 }
2222 this.l = l;
2223 this.classFile = currentClassFile;
2224 }
2225
2226 @Override
2227 public void run() {
2228 JavaFileObject previousClassFile = currentClassFile;
2229 try {
2230 currentClassFile = classFile;
2231 List<Attribute.Compound> newList = deproxyCompoundList(l);
2232 for (Attribute.Compound attr : newList) {
2233 if (attr.type.tsym == syms.deprecatedType.tsym) {
2234 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2235 Attribute forRemoval = attr.member(names.forRemoval);
2236 if (forRemoval instanceof Attribute.Constant) {
2237 Attribute.Constant c = (Attribute.Constant) forRemoval;
2238 if (c.type == syms.booleanType && ((Integer) c.value) != 0) {
2239 sym.flags_field |= DEPRECATED_REMOVAL;
2240 }
2241 }
2242 }
2243 }
2244 if (sym.annotationsPendingCompletion()) {
2245 sym.setDeclarationAttributes(newList);
2246 } else {
2247 sym.appendAttributes(newList);
2248 }
2249 } finally {
2250 currentClassFile = previousClassFile;
2251 }
2252 }
2253
2254 @Override
2255 public String toString() {
2256 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2257 }
2258 }
2259
2260 class TypeAnnotationCompleter extends AnnotationCompleter {
2261
2262 List<TypeAnnotationProxy> proxies;
2263
2264 TypeAnnotationCompleter(Symbol sym,
2265 List<TypeAnnotationProxy> proxies) {
2266 super(sym, List.<CompoundAnnotationProxy>nil());
2267 this.proxies = proxies;
2268 }
2269
2270 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2271 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2272 for (TypeAnnotationProxy proxy: proxies) {
2273 Attribute.Compound compound = deproxyCompound(proxy.compound);
2274 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2275 buf.add(typeCompound);
2276 }
2277 return buf.toList();
2278 }
2279
2280 @Override
2281 public void run() {
2282 JavaFileObject previousClassFile = currentClassFile;
2283 try {
2284 currentClassFile = classFile;
2285 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2286 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2287 } finally {
2288 currentClassFile = previousClassFile;
2289 }
2290 }
2291 }
2292
2293
2294 /************************************************************************
2295 * Reading Symbols
2296 ***********************************************************************/
2297
2298 /** Read a field.
2299 */
2300 VarSymbol readField() {
2301 long flags = adjustFieldFlags(nextChar());
2302 Name name = readName(nextChar());
2303 Type type = readType(nextChar());
2304 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2305 readMemberAttrs(v);
2306 return v;
2307 }
2308
2309 /** Read a method.
2310 */
2311 MethodSymbol readMethod() {
2312 long flags = adjustMethodFlags(nextChar());
2313 Name name = readName(nextChar());
2314 Type type = readType(nextChar());
2315 if (currentOwner.isInterface() &&
2316 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2317 if (majorVersion > Version.V52.major ||
2318 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2319 if ((flags & STATIC) == 0) {
2320 currentOwner.flags_field |= DEFAULT;
2321 flags |= DEFAULT | ABSTRACT;
2322 }
2323 } else {
2324 //protect against ill-formed classfiles
2325 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2326 Integer.toString(majorVersion),
2327 Integer.toString(minorVersion));
2328 }
2329 }
2330 if (name == names.init && currentOwner.hasOuterInstance()) {
2331 // Sometimes anonymous classes don't have an outer
2332 // instance, however, there is no reliable way to tell so
2333 // we never strip this$n
2334 // ditto for local classes. Local classes that have an enclosing method set
2335 // won't pass the "hasOuterInstance" check above, but those that don't have an
2336 // enclosing method (i.e. from initializers) will pass that check.
2337 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2338 if (!currentOwner.name.isEmpty() && !local)
2339 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2340 type.getReturnType(),
2341 type.getThrownTypes(),
2342 syms.methodClass);
2343 }
2344 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2345 if (types.isSignaturePolymorphic(m)) {
2346 m.flags_field |= SIGNATURE_POLYMORPHIC;
2347 }
2348 if (saveParameterNames)
2349 initParameterNames(m);
2350 Symbol prevOwner = currentOwner;
2351 currentOwner = m;
2352 try {
2353 readMemberAttrs(m);
2354 } finally {
2355 currentOwner = prevOwner;
2356 }
2357 if (saveParameterNames)
2358 setParameterNames(m, type);
2359
2360 if ((flags & VARARGS) != 0) {
2361 final Type last = type.getParameterTypes().last();
2362 if (last == null || !last.hasTag(ARRAY)) {
2363 m.flags_field &= ~VARARGS;
2364 throw badClassFile("malformed.vararg.method", m);
2365 }
2366 }
2367
2368 return m;
2369 }
2370
2371 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2372 boolean isVarargs = (flags & VARARGS) != 0;
2373 if (isVarargs) {
2374 Type varargsElem = args.last();
2375 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2376 for (Type t : args) {
2377 adjustedArgs.append(t != varargsElem ?
2378 t :
2379 ((ArrayType)t).makeVarargs());
2380 }
2381 args = adjustedArgs.toList();
2382 }
2383 return args.tail;
2384 }
2385
2386 /**
2387 * Init the parameter names array.
2388 * Parameter names are currently inferred from the names in the
2389 * LocalVariableTable attributes of a Code attribute.
2390 * (Note: this means parameter names are currently not available for
2391 * methods without a Code attribute.)
2392 * This method initializes an array in which to store the name indexes
2393 * of parameter names found in LocalVariableTable attributes. It is
2394 * slightly supersized to allow for additional slots with a start_pc of 0.
2395 */
2396 void initParameterNames(MethodSymbol sym) {
2397 // make allowance for synthetic parameters.
2398 final int excessSlots = 4;
2399 int expectedParameterSlots =
2400 Code.width(sym.type.getParameterTypes()) + excessSlots;
2401 if (parameterNameIndices == null
2402 || parameterNameIndices.length < expectedParameterSlots) {
2403 parameterNameIndices = new int[expectedParameterSlots];
2404 } else
2405 Arrays.fill(parameterNameIndices, 0);
2406 haveParameterNameIndices = false;
2407 sawMethodParameters = false;
2408 }
2409
2410 /**
2411 * Set the parameter names for a symbol from the name index in the
2412 * parameterNameIndicies array. The type of the symbol may have changed
2413 * while reading the method attributes (see the Signature attribute).
2414 * This may be because of generic information or because anonymous
2415 * synthetic parameters were added. The original type (as read from
2416 * the method descriptor) is used to help guess the existence of
2417 * anonymous synthetic parameters.
2418 * On completion, sym.savedParameter names will either be null (if
2419 * no parameter names were found in the class file) or will be set to a
2420 * list of names, one per entry in sym.type.getParameterTypes, with
2421 * any missing names represented by the empty name.
2422 */
2423 void setParameterNames(MethodSymbol sym, Type jvmType) {
2424 // if no names were found in the class file, there's nothing more to do
2425 if (!haveParameterNameIndices)
2426 return;
2427 // If we get parameter names from MethodParameters, then we
2428 // don't need to skip.
2429 int firstParam = 0;
2430 if (!sawMethodParameters) {
2431 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2432 // the code in readMethod may have skipped the first
2433 // parameter when setting up the MethodType. If so, we
2434 // make a corresponding allowance here for the position of
2435 // the first parameter. Note that this assumes the
2436 // skipped parameter has a width of 1 -- i.e. it is not
2437 // a double width type (long or double.)
2438 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2439 // Sometimes anonymous classes don't have an outer
2440 // instance, however, there is no reliable way to tell so
2441 // we never strip this$n
2442 if (!currentOwner.name.isEmpty())
2443 firstParam += 1;
2444 }
2445
2446 if (sym.type != jvmType) {
2447 // reading the method attributes has caused the
2448 // symbol's type to be changed. (i.e. the Signature
2449 // attribute.) This may happen if there are hidden
2450 // (synthetic) parameters in the descriptor, but not
2451 // in the Signature. The position of these hidden
2452 // parameters is unspecified; for now, assume they are
2453 // at the beginning, and so skip over them. The
2454 // primary case for this is two hidden parameters
2455 // passed into Enum constructors.
2456 int skip = Code.width(jvmType.getParameterTypes())
2457 - Code.width(sym.type.getParameterTypes());
2458 firstParam += skip;
2459 }
2460 }
2461 List<Name> paramNames = List.nil();
2462 int index = firstParam;
2463 for (Type t: sym.type.getParameterTypes()) {
2464 int nameIdx = (index < parameterNameIndices.length
2465 ? parameterNameIndices[index] : 0);
2466 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2467 paramNames = paramNames.prepend(name);
2468 index += Code.width(t);
2469 }
2470 sym.savedParameterNames = paramNames.reverse();
2471 }
2472
2473 /**
2474 * skip n bytes
2475 */
2476 void skipBytes(int n) {
2477 bp = bp + n;
2478 }
2479
2480 /** Skip a field or method
2481 */
2482 void skipMember() {
2483 bp = bp + 6;
2484 char ac = nextChar();
2485 for (int i = 0; i < ac; i++) {
2486 bp = bp + 2;
2487 int attrLen = nextInt();
2488 bp = bp + attrLen;
2489 }
2490 }
2491
2492 void skipInnerClasses() {
2493 int n = nextChar();
2494 for (int i = 0; i < n; i++) {
2495 nextChar();
2496 nextChar();
2497 nextChar();
2498 nextChar();
2499 }
2500 }
2501
2502 /** Enter type variables of this classtype and all enclosing ones in
2503 * `typevars'.
2504 */
2505 protected void enterTypevars(Symbol sym, Type t) {
2506 if (t.getEnclosingType() != null) {
2507 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
2508 enterTypevars(sym.owner, t.getEnclosingType());
2509 }
2510 } else if (sym.kind == MTH && !sym.isStatic()) {
2511 enterTypevars(sym.owner, sym.owner.type);
2512 }
2513 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
2514 typevars.enter(xs.head.tsym);
2515 }
2516 }
2517
2518 protected ClassSymbol enterClass(Name name) {
2519 return syms.enterClass(currentModule, name);
2520 }
2521
2522 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
2523 return syms.enterClass(currentModule, name, owner);
2524 }
2525
2526 /** Read contents of a given class symbol `c'. Both external and internal
2527 * versions of an inner class are read.
2528 */
2529 void readClass(ClassSymbol c) {
2530 ClassType ct = (ClassType)c.type;
2531
2532 // allocate scope for members
2533 c.members_field = WriteableScope.create(c);
2534
2535 // prepare type variable table
2536 typevars = typevars.dup(currentOwner);
2537 if (ct.getEnclosingType().hasTag(CLASS))
2538 enterTypevars(c.owner, ct.getEnclosingType());
2539
2540 // read flags, or skip if this is an inner class
2541 long f = nextChar();
2542 long flags = adjustClassFlags(f);
2543 if ((flags & MODULE) == 0) {
2544 if (c.owner.kind == PCK) c.flags_field = flags;
2545 // read own class name and check that it matches
2546 currentModule = c.packge().modle;
2547 ClassSymbol self = readClassSymbol(nextChar());
2548 if (c != self) {
2549 throw badClassFile("class.file.wrong.class",
2550 self.flatname);
2551 }
2552 } else {
2553 if (majorVersion < Version.V53.major) {
2554 throw badClassFile("anachronistic.module.info",
2555 Integer.toString(majorVersion),
2556 Integer.toString(minorVersion));
2557 }
2558 c.flags_field = flags;
2559 currentModule = (ModuleSymbol) c.owner;
2560 int this_class = nextChar();
2561 // temp, no check on this_class
2562 }
2563
2564 // class attributes must be read before class
2565 // skip ahead to read class attributes
2566 int startbp = bp;
2567 nextChar();
2568 char interfaceCount = nextChar();
2569 bp += interfaceCount * 2;
2570 char fieldCount = nextChar();
2571 for (int i = 0; i < fieldCount; i++) skipMember();
2572 char methodCount = nextChar();
2573 for (int i = 0; i < methodCount; i++) skipMember();
2574 readClassAttrs(c);
2575
2576 if (readAllOfClassFile) {
2577 for (int i = 1; i < poolObj.length; i++) readPool(i);
2578 c.pool = new Pool(poolObj.length, poolObj, types);
2579 }
2580
2581 // reset and read rest of classinfo
2582 bp = startbp;
2583 int n = nextChar();
2584 if ((flags & MODULE) != 0 && n > 0) {
2585 throw badClassFile("module.info.invalid.super.class");
2586 }
2587 if (ct.supertype_field == null)
2588 ct.supertype_field = (n == 0)
2589 ? Type.noType
2590 : readClassSymbol(n).erasure(types);
2591 n = nextChar();
2592 List<Type> is = List.nil();
2593 for (int i = 0; i < n; i++) {
2594 Type _inter = readClassSymbol(nextChar()).erasure(types);
2595 is = is.prepend(_inter);
2596 }
2597 if (ct.interfaces_field == null)
2598 ct.interfaces_field = is.reverse();
2599
2600 Assert.check(fieldCount == nextChar());
2601 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2602 Assert.check(methodCount == nextChar());
2603 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2604
2605 typevars = typevars.leave();
2606 }
2607
2608 /** Read inner class info. For each inner/outer pair allocate a
2609 * member class.
2610 */
2611 void readInnerClasses(ClassSymbol c) {
2612 int n = nextChar();
2613 for (int i = 0; i < n; i++) {
2614 nextChar(); // skip inner class symbol
2615 ClassSymbol outer = readClassSymbol(nextChar());
2616 Name name = readName(nextChar());
2617 if (name == null) name = names.empty;
2618 long flags = adjustClassFlags(nextChar());
2619 if (outer != null) { // we have a member class
2620 if (name == names.empty)
2621 name = names.one;
2622 ClassSymbol member = enterClass(name, outer);
2623 if ((flags & STATIC) == 0) {
2624 ((ClassType)member.type).setEnclosingType(outer.type);
2625 if (member.erasure_field != null)
2626 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2627 }
2628 if (c == outer) {
2629 member.flags_field = flags;
2630 enterMember(c, member);
2631 }
2632 }
2633 }
2634 }
2635
2636 /** Read a class definition from the bytes in buf.
2637 */
2638 private void readClassBuffer(ClassSymbol c) throws IOException {
2639 int magic = nextInt();
2640 if (magic != JAVA_MAGIC)
2641 throw badClassFile("illegal.start.of.class.file");
2642
2643 minorVersion = nextChar();
2644 majorVersion = nextChar();
2645 int maxMajor = 53; // Version.MAX().major; //******* TEMPORARY *******
2646 int maxMinor = Version.MAX().minor;
2647 if (majorVersion > maxMajor ||
2648 majorVersion * 1000 + minorVersion <
2649 Version.MIN().major * 1000 + Version.MIN().minor) {
2650 if (majorVersion == (maxMajor + 1))
2651 log.warning("big.major.version",
2652 currentClassFile,
2653 majorVersion,
2654 maxMajor);
2655 else
2656 throw badClassFile("wrong.version",
2657 Integer.toString(majorVersion),
2658 Integer.toString(minorVersion),
2659 Integer.toString(maxMajor),
2660 Integer.toString(maxMinor));
2661 }
2662
2663 indexPool();
2664 if (signatureBuffer.length < bp) {
2665 int ns = Integer.highestOneBit(bp) << 1;
2666 signatureBuffer = new byte[ns];
2667 }
2668 readClass(c);
2669 }
2670
2671 public void readClassFile(ClassSymbol c) {
2672 currentOwner = c;
2673 currentClassFile = c.classfile;
2674 warnedAttrs.clear();
2675 filling = true;
2676 target = null;
2677 repeatable = null;
2678 try {
2679 bp = 0;
2680 buf = readInputStream(buf, c.classfile.openInputStream());
2681 readClassBuffer(c);
2682 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2683 List<Type> missing = missingTypeVariables;
2684 List<Type> found = foundTypeVariables;
2685 missingTypeVariables = List.nil();
2686 foundTypeVariables = List.nil();
2687 interimUses = List.nil();
2688 interimProvides = List.nil();
2689 filling = false;
2690 ClassType ct = (ClassType)currentOwner.type;
2691 ct.supertype_field =
2692 types.subst(ct.supertype_field, missing, found);
2693 ct.interfaces_field =
2694 types.subst(ct.interfaces_field, missing, found);
2695 ct.typarams_field =
2696 types.substBounds(ct.typarams_field, missing, found);
2697 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
2698 types.head.tsym.type = types.head;
2699 }
2700 } else if (missingTypeVariables.isEmpty() !=
2701 foundTypeVariables.isEmpty()) {
2702 Name name = missingTypeVariables.head.tsym.name;
2703 throw badClassFile("undecl.type.var", name);
2704 }
2705
2706 if ((c.flags_field & Flags.ANNOTATION) != 0) {
2707 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
2708 } else {
2709 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
2710 }
2711
2712 if (c == currentModule.module_info) {
2713 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
2714 Assert.check(currentModule.isCompleted());
2715 currentModule.usesProvidesCompleter =
2716 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
2717 } else {
2718 currentModule.uses = List.nil();
2719 currentModule.provides = List.nil();
2720 }
2721 }
2722 } catch (IOException ex) {
2723 throw badClassFile("unable.to.access.file", ex.getMessage());
2724 } catch (ArrayIndexOutOfBoundsException ex) {
2725 throw badClassFile("bad.class.file", c.flatname);
2726 } finally {
2727 interimUses = List.nil();
2728 interimProvides = List.nil();
2729 missingTypeVariables = List.nil();
2730 foundTypeVariables = List.nil();
2731 filling = false;
2732 }
2733 }
2734 // where
2735 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2736 try {
2737 buf = ensureCapacity(buf, s.available());
2738 int r = s.read(buf);
2739 int bp = 0;
2740 while (r != -1) {
2741 bp += r;
2742 buf = ensureCapacity(buf, bp);
2743 r = s.read(buf, bp, buf.length - bp);
2744 }
2745 return buf;
2746 } finally {
2747 try {
2748 s.close();
2749 } catch (IOException e) {
2750 /* Ignore any errors, as this stream may have already
2751 * thrown a related exception which is the one that
2752 * should be reported.
2753 */
2754 }
2755 }
2756 }
2757 /*
2758 * ensureCapacity will increase the buffer as needed, taking note that
2759 * the new buffer will always be greater than the needed and never
2760 * exactly equal to the needed size or bp. If equal then the read (above)
2761 * will infinitely loop as buf.length - bp == 0.
2762 */
2763 private static byte[] ensureCapacity(byte[] buf, int needed) {
2764 if (buf.length <= needed) {
2765 byte[] old = buf;
2766 buf = new byte[Integer.highestOneBit(needed) << 1];
2767 System.arraycopy(old, 0, buf, 0, old.length);
2768 }
2769 return buf;
2770 }
2771
2772 /** We can only read a single class file at a time; this
2773 * flag keeps track of when we are currently reading a class
2774 * file.
2775 */
2776 public boolean filling = false;
2777
2778 /************************************************************************
2779 * Adjusting flags
2780 ***********************************************************************/
2781
2782 long adjustFieldFlags(long flags) {
2783 return flags;
2784 }
2785
2786 long adjustMethodFlags(long flags) {
2787 if ((flags & ACC_BRIDGE) != 0) {
2788 flags &= ~ACC_BRIDGE;
2789 flags |= BRIDGE;
2790 }
2791 if ((flags & ACC_VARARGS) != 0) {
2792 flags &= ~ACC_VARARGS;
2793 flags |= VARARGS;
2794 }
2795 return flags;
2796 }
2797
2798 long adjustClassFlags(long flags) {
2799 if ((flags & ACC_MODULE) != 0) {
2800 flags &= ~ACC_MODULE;
2801 flags |= MODULE;
2802 }
2803 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2804 }
2805
2806 /**
2807 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2808 * The attribute is only the last component of the original filename, so is unlikely
2809 * to be valid as is, so operations other than those to access the name throw
2810 * UnsupportedOperationException
2811 */
2812 private static class SourceFileObject implements JavaFileObject {
2813
2814 /** The file's name.
2815 */
2816 private final Name name;
2817 private final Name flatname;
2818
2819 public SourceFileObject(Name name, Name flatname) {
2820 this.name = name;
2821 this.flatname = flatname;
2822 }
2823
2824 @Override @DefinedBy(Api.COMPILER)
2825 public URI toUri() {
2826 try {
2827 return new URI(null, name.toString(), null);
2828 } catch (URISyntaxException e) {
2829 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
2830 }
2831 }
2832
2833 @Override @DefinedBy(Api.COMPILER)
2834 public String getName() {
2835 return name.toString();
2836 }
2837
2838 @Override @DefinedBy(Api.COMPILER)
2839 public JavaFileObject.Kind getKind() {
2840 return BaseFileManager.getKind(getName());
2841 }
2842
2843 @Override @DefinedBy(Api.COMPILER)
2844 public InputStream openInputStream() {
2845 throw new UnsupportedOperationException();
2846 }
2847
2848 @Override @DefinedBy(Api.COMPILER)
2849 public OutputStream openOutputStream() {
2850 throw new UnsupportedOperationException();
2851 }
2852
2853 @Override @DefinedBy(Api.COMPILER)
2854 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2855 throw new UnsupportedOperationException();
2856 }
2857
2858 @Override @DefinedBy(Api.COMPILER)
2859 public Reader openReader(boolean ignoreEncodingErrors) {
2860 throw new UnsupportedOperationException();
2861 }
2862
2863 @Override @DefinedBy(Api.COMPILER)
2864 public Writer openWriter() {
2865 throw new UnsupportedOperationException();
2866 }
2867
2868 @Override @DefinedBy(Api.COMPILER)
2869 public long getLastModified() {
2870 throw new UnsupportedOperationException();
2871 }
2872
2873 @Override @DefinedBy(Api.COMPILER)
2874 public boolean delete() {
2875 throw new UnsupportedOperationException();
2876 }
2877
2878 @Override @DefinedBy(Api.COMPILER)
2879 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2880 return true; // fail-safe mode
2881 }
2882
2883 @Override @DefinedBy(Api.COMPILER)
2884 public NestingKind getNestingKind() {
2885 return null;
2886 }
2887
2888 @Override @DefinedBy(Api.COMPILER)
2889 public Modifier getAccessLevel() {
2890 return null;
2891 }
2892
2893 /**
2894 * Check if two file objects are equal.
2895 * SourceFileObjects are just placeholder objects for the value of a
2896 * SourceFile attribute, and do not directly represent specific files.
2897 * Two SourceFileObjects are equal if their names are equal.
2898 */
2899 @Override
2900 public boolean equals(Object other) {
2901 if (this == other)
2902 return true;
2903
2904 if (!(other instanceof SourceFileObject))
2905 return false;
2906
2907 SourceFileObject o = (SourceFileObject) other;
2908 return name.equals(o.name);
2909 }
2910
2911 @Override
2912 public int hashCode() {
2913 return name.hashCode();
2914 }
2915 }
2916
2917 private class CompleterDeproxy implements AnnotationTypeCompleter {
2918 ClassSymbol proxyOn;
2919 CompoundAnnotationProxy target;
2920 CompoundAnnotationProxy repeatable;
2921
2922 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
2923 CompoundAnnotationProxy repeatable)
2924 {
2925 this.proxyOn = c;
2926 this.target = target;
2927 this.repeatable = repeatable;
2928 }
2929
2930 @Override
2931 public void complete(ClassSymbol sym) {
2932 Assert.check(proxyOn == sym);
2933 Attribute.Compound theTarget = null, theRepeatable = null;
2934 AnnotationDeproxy deproxy;
2935
2936 try {
2937 if (target != null) {
2938 deproxy = new AnnotationDeproxy(proxyOn);
2939 theTarget = deproxy.deproxyCompound(target);
2940 }
2941
2942 if (repeatable != null) {
2943 deproxy = new AnnotationDeproxy(proxyOn);
2944 theRepeatable = deproxy.deproxyCompound(repeatable);
2945 }
2946 } catch (Exception e) {
2947 throw new CompletionFailure(sym, e.getMessage());
2948 }
2949
2950 sym.getAnnotationTypeMetadata().setTarget(theTarget);
2951 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
2952 }
2953 }
2954
2955 private class ProxyType extends Type {
2956
2957 private final byte[] content;
2958
2959 public ProxyType(byte[] content) {
2960 super(syms.noSymbol, TypeMetadata.EMPTY);
2961 this.content = content;
2962 }
2963
2964 @Override
2965 public TypeTag getTag() {
2966 return TypeTag.NONE;
2967 }
2968
2969 @Override
2970 public Type cloneWithMetadata(TypeMetadata metadata) {
2971 throw new UnsupportedOperationException();
2972 }
2973
2974 public Type resolve() {
2975 return sigToType(content, 0, content.length);
2976 }
2977
2978 @Override @DefinedBy(Api.LANGUAGE_MODEL)
2979 public String toString() {
2980 return "<ProxyType>";
2981 }
2982
2983 }
2984
2985 private static final class InterimUsesDirective {
2986 public final Name service;
2987
2988 public InterimUsesDirective(Name service) {
2989 this.service = service;
2990 }
2991
2992 }
2993
2994 private static final class InterimProvidesDirective {
2995 public final Name service;
2996 public final List<Name> impls;
2997
2998 public InterimProvidesDirective(Name service, List<Name> impls) {
2999 this.service = service;
3000 this.impls = impls;
3001 }
3002
3003 }
3004
3005 private final class UsesProvidesCompleter implements Completer {
3006 private final ModuleSymbol currentModule;
3007 private final List<InterimUsesDirective> interimUsesCopy;
3008 private final List<InterimProvidesDirective> interimProvidesCopy;
3009
3010 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3011 this.currentModule = currentModule;
3012 this.interimUsesCopy = interimUsesCopy;
3013 this.interimProvidesCopy = interimProvidesCopy;
3014 }
3015
3016 @Override
3017 public void complete(Symbol sym) throws CompletionFailure {
3018 ListBuffer<Directive> directives = new ListBuffer<>();
3019 directives.addAll(currentModule.directives);
3020 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3021 for (InterimUsesDirective interim : interimUsesCopy) {
3022 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3023 uses.add(d);
3024 directives.add(d);
3025 }
3026 currentModule.uses = uses.toList();
3027 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3028 for (InterimProvidesDirective interim : interimProvidesCopy) {
3029 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3030 for (Name impl : interim.impls) {
3031 impls.append(syms.enterClass(currentModule, impl));
3032 }
3033 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3034 impls.toList());
3035 provides.add(d);
3036 directives.add(d);
3037 }
3038 currentModule.provides = provides.toList();
3039 currentModule.directives = directives.toList();
3040 }
3041 }
3042 }