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 // FIXME: temporary compatibility code
165 private boolean readNewModuleAttribute;
166
167 /** The buffer containing the currently read class file.
168 */
169 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
170
171 /** The current input pointer.
172 */
173 protected int bp;
174
175 /** The objects of the constant pool.
176 */
177 Object[] poolObj;
178
179 /** For every constant pool entry, an index into buf where the
180 * defining section of the entry is found.
181 */
182 int[] poolIdx;
183
184 /** The major version number of the class file being read. */
185 int majorVersion;
186 /** The minor version number of the class file being read. */
187 int minorVersion;
188
189 /** A table to hold the constant pool indices for method parameter
190 * names, as given in LocalVariableTable attributes.
191 */
192 int[] parameterNameIndices;
193
194 /**
195 * Whether or not any parameter names have been found.
196 */
197 boolean haveParameterNameIndices;
198
199 /** Set this to false every time we start reading a method
200 * and are saving parameter names. Set it to true when we see
201 * MethodParameters, if it's set when we see a LocalVariableTable,
202 * then we ignore the parameter names from the LVT.
203 */
204 boolean sawMethodParameters;
205
206 /**
207 * The set of attribute names for which warnings have been generated for the current class
208 */
209 Set<Name> warnedAttrs = new HashSet<>();
210
211 /**
212 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
213 * @Target
214 */
215 CompoundAnnotationProxy target;
216
217 /**
218 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with
219 * @Repeatable
220 */
221 CompoundAnnotationProxy repeatable;
222
223 /** Get the ClassReader instance for this invocation. */
224 public static ClassReader instance(Context context) {
225 ClassReader instance = context.get(classReaderKey);
226 if (instance == null)
227 instance = new ClassReader(context);
228 return instance;
229 }
230
231 /** Construct a new class reader. */
232 protected ClassReader(Context context) {
233 context.put(classReaderKey, this);
234 annotate = Annotate.instance(context);
235 names = Names.instance(context);
236 syms = Symtab.instance(context);
237 types = Types.instance(context);
238 fileManager = context.get(JavaFileManager.class);
239 if (fileManager == null)
240 throw new AssertionError("FileManager initialization error");
241 diagFactory = JCDiagnostic.Factory.instance(context);
242
243 log = Log.instance(context);
244
245 Options options = Options.instance(context);
246 verbose = options.isSet(Option.VERBOSE);
247
248 Source source = Source.instance(context);
249 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
250 allowModules = source.allowModules();
251
252 saveParameterNames = options.isSet(PARAMETERS);
253
254 profile = Profile.instance(context);
255
256 typevars = WriteableScope.create(syms.noSymbol);
257
258 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
259
260 initAttributeReaders();
261 }
262
263 /** Add member to class unless it is synthetic.
264 */
265 private void enterMember(ClassSymbol c, Symbol sym) {
266 // Synthetic members are not entered -- reason lost to history (optimization?).
267 // Lambda methods must be entered because they may have inner classes (which reference them)
268 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
269 c.members_field.enter(sym);
270 }
271
272 /************************************************************************
273 * Error Diagnoses
274 ***********************************************************************/
275
276 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
277 return new ClassFinder.BadClassFile (
278 currentOwner.enclClass(),
279 currentClassFile,
280 diagFactory.fragment(key, args),
281 diagFactory);
282 }
283
284 public ClassFinder.BadEnclosingMethodAttr badEnclosingMethod(Object... args) {
285 return new ClassFinder.BadEnclosingMethodAttr (
286 currentOwner.enclClass(),
287 currentClassFile,
288 diagFactory.fragment("bad.enclosing.method", args),
289 diagFactory);
290 }
291
292 /************************************************************************
293 * Buffer Access
294 ***********************************************************************/
295
296 /** Read a character.
297 */
298 char nextChar() {
299 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
300 }
301
302 /** Read a byte.
303 */
304 int nextByte() {
305 return buf[bp++] & 0xFF;
306 }
307
308 /** Read an integer.
309 */
310 int nextInt() {
311 return
312 ((buf[bp++] & 0xFF) << 24) +
313 ((buf[bp++] & 0xFF) << 16) +
314 ((buf[bp++] & 0xFF) << 8) +
315 (buf[bp++] & 0xFF);
316 }
317
318 /** Extract a character at position bp from buf.
319 */
320 char getChar(int bp) {
321 return
322 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
323 }
324
325 /** Extract an integer at position bp from buf.
326 */
327 int getInt(int bp) {
328 return
329 ((buf[bp] & 0xFF) << 24) +
330 ((buf[bp+1] & 0xFF) << 16) +
331 ((buf[bp+2] & 0xFF) << 8) +
332 (buf[bp+3] & 0xFF);
333 }
334
335
336 /** Extract a long integer at position bp from buf.
337 */
338 long getLong(int bp) {
339 DataInputStream bufin =
340 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
341 try {
342 return bufin.readLong();
343 } catch (IOException e) {
344 throw new AssertionError(e);
345 }
346 }
347
348 /** Extract a float at position bp from buf.
349 */
350 float getFloat(int bp) {
351 DataInputStream bufin =
352 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
353 try {
354 return bufin.readFloat();
355 } catch (IOException e) {
356 throw new AssertionError(e);
357 }
358 }
359
360 /** Extract a double at position bp from buf.
361 */
362 double getDouble(int bp) {
363 DataInputStream bufin =
364 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
365 try {
366 return bufin.readDouble();
367 } catch (IOException e) {
368 throw new AssertionError(e);
369 }
370 }
371
372 /************************************************************************
373 * Constant Pool Access
374 ***********************************************************************/
375
376 /** Index all constant pool entries, writing their start addresses into
377 * poolIdx.
378 */
379 void indexPool() {
380 poolIdx = new int[nextChar()];
381 poolObj = new Object[poolIdx.length];
382 int i = 1;
383 while (i < poolIdx.length) {
384 poolIdx[i++] = bp;
385 byte tag = buf[bp++];
386 switch (tag) {
387 case CONSTANT_Utf8: case CONSTANT_Unicode: {
388 int len = nextChar();
389 bp = bp + len;
390 break;
391 }
392 case CONSTANT_Class:
393 case CONSTANT_String:
394 case CONSTANT_MethodType:
395 bp = bp + 2;
396 break;
397 case CONSTANT_MethodHandle:
398 bp = bp + 3;
399 break;
400 case CONSTANT_Fieldref:
401 case CONSTANT_Methodref:
402 case CONSTANT_InterfaceMethodref:
403 case CONSTANT_NameandType:
404 case CONSTANT_Integer:
405 case CONSTANT_Float:
406 case CONSTANT_InvokeDynamic:
407 bp = bp + 4;
408 break;
409 case CONSTANT_Long:
410 case CONSTANT_Double:
411 bp = bp + 8;
412 i++;
413 break;
414 default:
415 throw badClassFile("bad.const.pool.tag.at",
416 Byte.toString(tag),
417 Integer.toString(bp -1));
418 }
419 }
420 }
421
422 /** Read constant pool entry at start address i, use pool as a cache.
423 */
424 Object readPool(int i) {
425 Object result = poolObj[i];
426 if (result != null) return result;
427
428 int index = poolIdx[i];
429 if (index == 0) return null;
430
431 byte tag = buf[index];
432 switch (tag) {
433 case CONSTANT_Utf8:
434 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
435 break;
436 case CONSTANT_Unicode:
437 throw badClassFile("unicode.str.not.supported");
438 case CONSTANT_Class:
439 poolObj[i] = readClassOrType(getChar(index + 1));
440 break;
441 case CONSTANT_String:
442 // FIXME: (footprint) do not use toString here
443 poolObj[i] = readName(getChar(index + 1)).toString();
444 break;
445 case CONSTANT_Fieldref: {
446 ClassSymbol owner = readClassSymbol(getChar(index + 1));
447 NameAndType nt = readNameAndType(getChar(index + 3));
448 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
449 break;
450 }
451 case CONSTANT_Methodref:
452 case CONSTANT_InterfaceMethodref: {
453 ClassSymbol owner = readClassSymbol(getChar(index + 1));
454 NameAndType nt = readNameAndType(getChar(index + 3));
455 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
456 break;
457 }
458 case CONSTANT_NameandType:
459 poolObj[i] = new NameAndType(
460 readName(getChar(index + 1)),
461 readType(getChar(index + 3)), types);
462 break;
463 case CONSTANT_Integer:
464 poolObj[i] = getInt(index + 1);
465 break;
466 case CONSTANT_Float:
467 poolObj[i] = Float.valueOf(getFloat(index + 1));
468 break;
469 case CONSTANT_Long:
470 poolObj[i] = Long.valueOf(getLong(index + 1));
471 break;
472 case CONSTANT_Double:
473 poolObj[i] = Double.valueOf(getDouble(index + 1));
474 break;
475 case CONSTANT_MethodHandle:
476 skipBytes(4);
477 break;
478 case CONSTANT_MethodType:
479 skipBytes(3);
480 break;
481 case CONSTANT_InvokeDynamic:
482 skipBytes(5);
483 break;
484 default:
485 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
486 }
487 return poolObj[i];
488 }
489
490 /** Read signature and convert to type.
491 */
492 Type readType(int i) {
493 int index = poolIdx[i];
494 return sigToType(buf, index + 3, getChar(index + 1));
495 }
496
497 /** If name is an array type or class signature, return the
498 * corresponding type; otherwise return a ClassSymbol with given name.
499 */
500 Object readClassOrType(int i) {
501 int index = poolIdx[i];
502 int len = getChar(index + 1);
503 int start = index + 3;
504 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
505 // by the above assertion, the following test can be
506 // simplified to (buf[start] == '[')
507 return (buf[start] == '[' || buf[start + len - 1] == ';')
508 ? (Object)sigToType(buf, start, len)
509 : (Object)enterClass(names.fromUtf(internalize(buf, start,
510 len)));
511 }
512
513 /** Read signature and convert to type parameters.
514 */
515 List<Type> readTypeParams(int i) {
516 int index = poolIdx[i];
517 return sigToTypeParams(buf, index + 3, getChar(index + 1));
518 }
519
520 /** Read class entry.
521 */
522 ClassSymbol readClassSymbol(int i) {
523 Object obj = readPool(i);
524 if (obj != null && !(obj instanceof ClassSymbol))
525 throw badClassFile("bad.const.pool.entry",
526 currentClassFile.toString(),
527 "CONSTANT_Class_info", i);
528 return (ClassSymbol)obj;
529 }
530
531 Name readClassName(int i) {
532 int index = poolIdx[i];
533 if (index == 0) return null;
534 byte tag = buf[index];
535 if (tag != CONSTANT_Class) {
536 throw badClassFile("bad.const.pool.entry",
537 currentClassFile.toString(),
538 "CONSTANT_Class_info", i);
539 }
540 int nameIndex = poolIdx[getChar(index + 1)];
541 int len = getChar(nameIndex + 1);
542 int start = nameIndex + 3;
543 if (buf[start] == '[' || buf[start + len - 1] == ';')
544 throw badClassFile("wrong class name"); //TODO: proper diagnostics
545 return names.fromUtf(internalize(buf, start, len));
546 }
547
548 /** Read name.
549 */
550 Name readName(int i) {
551 Object obj = readPool(i);
552 if (obj != null && !(obj instanceof Name))
553 throw badClassFile("bad.const.pool.entry",
554 currentClassFile.toString(),
555 "CONSTANT_Utf8_info or CONSTANT_String_info", i);
556 return (Name)obj;
557 }
558
559 /** Read name and type.
560 */
561 NameAndType readNameAndType(int i) {
562 Object obj = readPool(i);
563 if (obj != null && !(obj instanceof NameAndType))
564 throw badClassFile("bad.const.pool.entry",
565 currentClassFile.toString(),
566 "CONSTANT_NameAndType_info", i);
567 return (NameAndType)obj;
568 }
569
570 /** Read the class name of a module-info.class file.
571 * The name is stored in a CONSTANT_Class entry, where the
572 * class name is of the form module-name.module-info.
573 */
574 Name readModuleInfoName(int i) {
575 if (majorVersion < Version.V53.major) {
576 throw badClassFile("anachronistic.module.info",
577 Integer.toString(majorVersion),
578 Integer.toString(minorVersion));
579 }
580 int classIndex = poolIdx[i];
581 if (buf[classIndex] == CONSTANT_Class) {
582 int utf8Index = poolIdx[getChar(classIndex + 1)];
583 if (buf[utf8Index] == CONSTANT_Utf8) {
584 int len = getChar(utf8Index + 1);
585 int start = utf8Index + 3;
586 return names.fromUtf(internalize(buf, start, len));
587 }
588 }
589 throw badClassFile("bad.module-info.name");
590 }
591
592 /** Read the name of a module.
593 * The name is stored in a CONSTANT_Utf8 entry, in
594 * JVMS 4.2 internal form (with '/' instead of '.')
595 */
596 Name readModuleName(int i) {
597 Name name = readName(i);
598 // FIXME: temporary compatibility code
599 if (readNewModuleAttribute) {
600 return names.fromUtf(internalize(name));
601 } else {
602 return name;
603 }
604 }
605
606 /** Read module_flags.
607 */
608 Set<ModuleFlags> readModuleFlags(int flags) {
609 Set<ModuleFlags> set = EnumSet.noneOf(ModuleFlags.class);
610 for (ModuleFlags f : ModuleFlags.values()) {
611 if ((flags & f.value) != 0)
612 set.add(f);
613 }
614 return set;
615 }
616
617 /** Read exports_flags.
618 */
619 Set<ExportsFlag> readExportsFlags(int flags) {
620 Set<ExportsFlag> set = EnumSet.noneOf(ExportsFlag.class);
621 for (ExportsFlag f: ExportsFlag.values()) {
622 if ((flags & f.value) != 0)
623 set.add(f);
624 }
625 return set;
626 }
627
628 /** Read opens_flags.
629 */
630 Set<OpensFlag> readOpensFlags(int flags) {
631 Set<OpensFlag> set = EnumSet.noneOf(OpensFlag.class);
632 for (OpensFlag f: OpensFlag.values()) {
633 if ((flags & f.value) != 0)
634 set.add(f);
635 }
636 return set;
637 }
638
639 /** Read requires_flags.
640 */
641 Set<RequiresFlag> readRequiresFlags(int flags) {
642 Set<RequiresFlag> set = EnumSet.noneOf(RequiresFlag.class);
643 for (RequiresFlag f: RequiresFlag.values()) {
644 if ((flags & f.value) != 0)
645 set.add(f);
646 }
647 return set;
648 }
649
650 /************************************************************************
651 * Reading Types
652 ***********************************************************************/
653
654 /** The unread portion of the currently read type is
655 * signature[sigp..siglimit-1].
656 */
657 byte[] signature;
658 int sigp;
659 int siglimit;
660 boolean sigEnterPhase = false;
661
662 /** Convert signature to type, where signature is a byte array segment.
663 */
664 Type sigToType(byte[] sig, int offset, int len) {
665 signature = sig;
666 sigp = offset;
667 siglimit = offset + len;
668 return sigToType();
669 }
670
671 /** Convert signature to type, where signature is implicit.
672 */
673 Type sigToType() {
674 switch ((char) signature[sigp]) {
675 case 'T':
676 sigp++;
677 int start = sigp;
678 while (signature[sigp] != ';') sigp++;
679 sigp++;
680 return sigEnterPhase
681 ? Type.noType
682 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
683 case '+': {
684 sigp++;
685 Type t = sigToType();
686 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
687 }
688 case '*':
689 sigp++;
690 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
691 syms.boundClass);
692 case '-': {
693 sigp++;
694 Type t = sigToType();
695 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
696 }
697 case 'B':
698 sigp++;
699 return syms.byteType;
700 case 'C':
701 sigp++;
702 return syms.charType;
703 case 'D':
704 sigp++;
705 return syms.doubleType;
706 case 'F':
707 sigp++;
708 return syms.floatType;
709 case 'I':
710 sigp++;
711 return syms.intType;
712 case 'J':
713 sigp++;
714 return syms.longType;
715 case 'L':
716 {
717 // int oldsigp = sigp;
718 Type t = classSigToType();
719 if (sigp < siglimit && signature[sigp] == '.')
720 throw badClassFile("deprecated inner class signature syntax " +
721 "(please recompile from source)");
722 /*
723 System.err.println(" decoded " +
724 new String(signature, oldsigp, sigp-oldsigp) +
725 " => " + t + " outer " + t.outer());
726 */
727 return t;
728 }
729 case 'S':
730 sigp++;
731 return syms.shortType;
732 case 'V':
733 sigp++;
734 return syms.voidType;
735 case 'Z':
736 sigp++;
737 return syms.booleanType;
738 case '[':
739 sigp++;
740 return new ArrayType(sigToType(), syms.arrayClass);
741 case '(':
742 sigp++;
743 List<Type> argtypes = sigToTypes(')');
744 Type restype = sigToType();
745 List<Type> thrown = List.nil();
746 while (signature[sigp] == '^') {
747 sigp++;
748 thrown = thrown.prepend(sigToType());
749 }
750 // if there is a typevar in the throws clause we should state it.
751 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
752 if (l.head.hasTag(TYPEVAR)) {
753 l.head.tsym.flags_field |= THROWS;
754 }
755 }
756 return new MethodType(argtypes,
757 restype,
758 thrown.reverse(),
759 syms.methodClass);
760 case '<':
761 typevars = typevars.dup(currentOwner);
762 Type poly = new ForAll(sigToTypeParams(), sigToType());
763 typevars = typevars.leave();
764 return poly;
765 default:
766 throw badClassFile("bad.signature",
767 Convert.utf2string(signature, sigp, 10));
768 }
769 }
770
771 byte[] signatureBuffer = new byte[0];
772 int sbp = 0;
773 /** Convert class signature to type, where signature is implicit.
774 */
775 Type classSigToType() {
776 if (signature[sigp] != 'L')
777 throw badClassFile("bad.class.signature",
778 Convert.utf2string(signature, sigp, 10));
779 sigp++;
780 Type outer = Type.noType;
781 int startSbp = sbp;
782
783 while (true) {
784 final byte c = signature[sigp++];
785 switch (c) {
786
787 case ';': { // end
788 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
789 startSbp,
790 sbp - startSbp));
791
792 try {
793 return (outer == Type.noType) ?
794 t.erasure(types) :
795 new ClassType(outer, List.<Type>nil(), t);
796 } finally {
797 sbp = startSbp;
798 }
799 }
800
801 case '<': // generic arguments
802 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
803 startSbp,
804 sbp - startSbp));
805 outer = new ClassType(outer, sigToTypes('>'), t) {
806 boolean completed = false;
807 @Override @DefinedBy(Api.LANGUAGE_MODEL)
808 public Type getEnclosingType() {
809 if (!completed) {
810 completed = true;
811 tsym.complete();
812 Type enclosingType = tsym.type.getEnclosingType();
813 if (enclosingType != Type.noType) {
814 List<Type> typeArgs =
815 super.getEnclosingType().allparams();
816 List<Type> typeParams =
817 enclosingType.allparams();
818 if (typeParams.length() != typeArgs.length()) {
819 // no "rare" types
820 super.setEnclosingType(types.erasure(enclosingType));
821 } else {
822 super.setEnclosingType(types.subst(enclosingType,
823 typeParams,
824 typeArgs));
825 }
826 } else {
827 super.setEnclosingType(Type.noType);
828 }
829 }
830 return super.getEnclosingType();
831 }
832 @Override
833 public void setEnclosingType(Type outer) {
834 throw new UnsupportedOperationException();
835 }
836 };
837 switch (signature[sigp++]) {
838 case ';':
839 if (sigp < signature.length && signature[sigp] == '.') {
840 // support old-style GJC signatures
841 // The signature produced was
842 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
843 // rather than say
844 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
845 // so we skip past ".Lfoo/Outer$"
846 sigp += (sbp - startSbp) + // "foo/Outer"
847 3; // ".L" and "$"
848 signatureBuffer[sbp++] = (byte)'$';
849 break;
850 } else {
851 sbp = startSbp;
852 return outer;
853 }
854 case '.':
855 signatureBuffer[sbp++] = (byte)'$';
856 break;
857 default:
858 throw new AssertionError(signature[sigp-1]);
859 }
860 continue;
861
862 case '.':
863 //we have seen an enclosing non-generic class
864 if (outer != Type.noType) {
865 t = enterClass(names.fromUtf(signatureBuffer,
866 startSbp,
867 sbp - startSbp));
868 outer = new ClassType(outer, List.<Type>nil(), t);
869 }
870 signatureBuffer[sbp++] = (byte)'$';
871 continue;
872 case '/':
873 signatureBuffer[sbp++] = (byte)'.';
874 continue;
875 default:
876 signatureBuffer[sbp++] = c;
877 continue;
878 }
879 }
880 }
881
882 /** Convert (implicit) signature to list of types
883 * until `terminator' is encountered.
884 */
885 List<Type> sigToTypes(char terminator) {
886 List<Type> head = List.of(null);
887 List<Type> tail = head;
888 while (signature[sigp] != terminator)
889 tail = tail.setTail(List.of(sigToType()));
890 sigp++;
891 return head.tail;
892 }
893
894 /** Convert signature to type parameters, where signature is a byte
895 * array segment.
896 */
897 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
898 signature = sig;
899 sigp = offset;
900 siglimit = offset + len;
901 return sigToTypeParams();
902 }
903
904 /** Convert signature to type parameters, where signature is implicit.
905 */
906 List<Type> sigToTypeParams() {
907 List<Type> tvars = List.nil();
908 if (signature[sigp] == '<') {
909 sigp++;
910 int start = sigp;
911 sigEnterPhase = true;
912 while (signature[sigp] != '>')
913 tvars = tvars.prepend(sigToTypeParam());
914 sigEnterPhase = false;
915 sigp = start;
916 while (signature[sigp] != '>')
917 sigToTypeParam();
918 sigp++;
919 }
920 return tvars.reverse();
921 }
922
923 /** Convert (implicit) signature to type parameter.
924 */
925 Type sigToTypeParam() {
926 int start = sigp;
927 while (signature[sigp] != ':') sigp++;
928 Name name = names.fromUtf(signature, start, sigp - start);
929 TypeVar tvar;
930 if (sigEnterPhase) {
931 tvar = new TypeVar(name, currentOwner, syms.botType);
932 typevars.enter(tvar.tsym);
933 } else {
934 tvar = (TypeVar)findTypeVar(name);
935 }
936 List<Type> bounds = List.nil();
937 boolean allInterfaces = false;
938 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
939 sigp++;
940 allInterfaces = true;
941 }
942 while (signature[sigp] == ':') {
943 sigp++;
944 bounds = bounds.prepend(sigToType());
945 }
946 if (!sigEnterPhase) {
947 types.setBounds(tvar, bounds.reverse(), allInterfaces);
948 }
949 return tvar;
950 }
951
952 /** Find type variable with given name in `typevars' scope.
953 */
954 Type findTypeVar(Name name) {
955 Symbol s = typevars.findFirst(name);
956 if (s != null) {
957 return s.type;
958 } else {
959 if (readingClassAttr) {
960 // While reading the class attribute, the supertypes
961 // might refer to a type variable from an enclosing element
962 // (method or class).
963 // If the type variable is defined in the enclosing class,
964 // we can actually find it in
965 // currentOwner.owner.type.getTypeArguments()
966 // However, until we have read the enclosing method attribute
967 // we don't know for sure if this owner is correct. It could
968 // be a method and there is no way to tell before reading the
969 // enclosing method attribute.
970 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
971 missingTypeVariables = missingTypeVariables.prepend(t);
972 // System.err.println("Missing type var " + name);
973 return t;
974 }
975 throw badClassFile("undecl.type.var", name);
976 }
977 }
978
979 /************************************************************************
980 * Reading Attributes
981 ***********************************************************************/
982
983 protected enum AttributeKind { CLASS, MEMBER }
984
985 protected abstract class AttributeReader {
986 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
987 this.name = name;
988 this.version = version;
989 this.kinds = kinds;
990 }
991
992 protected boolean accepts(AttributeKind kind) {
993 if (kinds.contains(kind)) {
994 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
995 return true;
996
997 if (lintClassfile && !warnedAttrs.contains(name)) {
998 JavaFileObject prev = log.useSource(currentClassFile);
999 try {
1000 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
1001 name, version.major, version.minor, majorVersion, minorVersion);
1002 } finally {
1003 log.useSource(prev);
1004 }
1005 warnedAttrs.add(name);
1006 }
1007 }
1008 return false;
1009 }
1010
1011 protected abstract void read(Symbol sym, int attrLen);
1012
1013 protected final Name name;
1014 protected final ClassFile.Version version;
1015 protected final Set<AttributeKind> kinds;
1016 }
1017
1018 protected Set<AttributeKind> CLASS_ATTRIBUTE =
1019 EnumSet.of(AttributeKind.CLASS);
1020 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
1021 EnumSet.of(AttributeKind.MEMBER);
1022 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
1023 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
1024
1025 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
1026
1027 private void initAttributeReaders() {
1028 AttributeReader[] readers = {
1029 // v45.3 attributes
1030
1031 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
1032 protected void read(Symbol sym, int attrLen) {
1033 if (readAllOfClassFile || saveParameterNames)
1034 ((MethodSymbol)sym).code = readCode(sym);
1035 else
1036 bp = bp + attrLen;
1037 }
1038 },
1039
1040 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
1041 protected void read(Symbol sym, int attrLen) {
1042 Object v = readPool(nextChar());
1043 // Ignore ConstantValue attribute if field not final.
1044 if ((sym.flags() & FINAL) != 0)
1045 ((VarSymbol) sym).setData(v);
1046 }
1047 },
1048
1049 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1050 protected void read(Symbol sym, int attrLen) {
1051 Symbol s = sym.owner.kind == MDL ? sym.owner : sym;
1052
1053 s.flags_field |= DEPRECATED;
1054 }
1055 },
1056
1057 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1058 protected void read(Symbol sym, int attrLen) {
1059 int nexceptions = nextChar();
1060 List<Type> thrown = List.nil();
1061 for (int j = 0; j < nexceptions; j++)
1062 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
1063 if (sym.type.getThrownTypes().isEmpty())
1064 sym.type.asMethodType().thrown = thrown.reverse();
1065 }
1066 },
1067
1068 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
1069 protected void read(Symbol sym, int attrLen) {
1070 ClassSymbol c = (ClassSymbol) sym;
1071 if (currentModule.module_info == c) {
1072 //prevent entering the classes too soon:
1073 skipInnerClasses();
1074 } else {
1075 readInnerClasses(c);
1076 }
1077 }
1078 },
1079
1080 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1081 protected void read(Symbol sym, int attrLen) {
1082 int newbp = bp + attrLen;
1083 if (saveParameterNames && !sawMethodParameters) {
1084 // Pick up parameter names from the variable table.
1085 // Parameter names are not explicitly identified as such,
1086 // but all parameter name entries in the LocalVariableTable
1087 // have a start_pc of 0. Therefore, we record the name
1088 // indicies of all slots with a start_pc of zero in the
1089 // parameterNameIndicies array.
1090 // Note that this implicitly honors the JVMS spec that
1091 // there may be more than one LocalVariableTable, and that
1092 // there is no specified ordering for the entries.
1093 int numEntries = nextChar();
1094 for (int i = 0; i < numEntries; i++) {
1095 int start_pc = nextChar();
1096 int length = nextChar();
1097 int nameIndex = nextChar();
1098 int sigIndex = nextChar();
1099 int register = nextChar();
1100 if (start_pc == 0) {
1101 // ensure array large enough
1102 if (register >= parameterNameIndices.length) {
1103 int newSize =
1104 Math.max(register + 1, parameterNameIndices.length + 8);
1105 parameterNameIndices =
1106 Arrays.copyOf(parameterNameIndices, newSize);
1107 }
1108 parameterNameIndices[register] = nameIndex;
1109 haveParameterNameIndices = true;
1110 }
1111 }
1112 }
1113 bp = newbp;
1114 }
1115 },
1116
1117 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1118 protected void read(Symbol sym, int attrLen) {
1119 ClassSymbol c = (ClassSymbol) sym;
1120 Name n = readName(nextChar());
1121 c.sourcefile = new SourceFileObject(n, c.flatname);
1122 // If the class is a toplevel class, originating from a Java source file,
1123 // but the class name does not match the file name, then it is
1124 // an auxiliary class.
1125 String sn = n.toString();
1126 if (c.owner.kind == PCK &&
1127 sn.endsWith(".java") &&
1128 !sn.equals(c.name.toString()+".java")) {
1129 c.flags_field |= AUXILIARY;
1130 }
1131 }
1132 },
1133
1134 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1135 protected void read(Symbol sym, int attrLen) {
1136 sym.flags_field |= SYNTHETIC;
1137 }
1138 },
1139
1140 // standard v49 attributes
1141
1142 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1143 protected void read(Symbol sym, int attrLen) {
1144 int newbp = bp + attrLen;
1145 readEnclosingMethodAttr(sym);
1146 bp = newbp;
1147 }
1148 },
1149
1150 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1151 protected void read(Symbol sym, int attrLen) {
1152 if (sym.kind == TYP) {
1153 ClassSymbol c = (ClassSymbol) sym;
1154 readingClassAttr = true;
1155 try {
1156 ClassType ct1 = (ClassType)c.type;
1157 Assert.check(c == currentOwner);
1158 ct1.typarams_field = readTypeParams(nextChar());
1159 ct1.supertype_field = sigToType();
1160 ListBuffer<Type> is = new ListBuffer<>();
1161 while (sigp != siglimit) is.append(sigToType());
1162 ct1.interfaces_field = is.toList();
1163 } finally {
1164 readingClassAttr = false;
1165 }
1166 } else {
1167 List<Type> thrown = sym.type.getThrownTypes();
1168 sym.type = readType(nextChar());
1169 //- System.err.println(" # " + sym.type);
1170 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1171 sym.type.asMethodType().thrown = thrown;
1172
1173 }
1174 }
1175 },
1176
1177 // v49 annotation attributes
1178
1179 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1180 protected void read(Symbol sym, int attrLen) {
1181 attachAnnotationDefault(sym);
1182 }
1183 },
1184
1185 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1186 protected void read(Symbol sym, int attrLen) {
1187 attachAnnotations(sym);
1188 }
1189 },
1190
1191 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1192 protected void read(Symbol sym, int attrLen) {
1193 attachParameterAnnotations(sym);
1194 }
1195 },
1196
1197 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1198 protected void read(Symbol sym, int attrLen) {
1199 attachAnnotations(sym);
1200 }
1201 },
1202
1203 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1204 protected void read(Symbol sym, int attrLen) {
1205 attachParameterAnnotations(sym);
1206 }
1207 },
1208
1209 // additional "legacy" v49 attributes, superceded by flags
1210
1211 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1212 protected void read(Symbol sym, int attrLen) {
1213 sym.flags_field |= ANNOTATION;
1214 }
1215 },
1216
1217 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1218 protected void read(Symbol sym, int attrLen) {
1219 sym.flags_field |= BRIDGE;
1220 }
1221 },
1222
1223 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1224 protected void read(Symbol sym, int attrLen) {
1225 sym.flags_field |= ENUM;
1226 }
1227 },
1228
1229 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1230 protected void read(Symbol sym, int attrLen) {
1231 sym.flags_field |= VARARGS;
1232 }
1233 },
1234
1235 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1236 protected void read(Symbol sym, int attrLen) {
1237 attachTypeAnnotations(sym);
1238 }
1239 },
1240
1241 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1242 protected void read(Symbol sym, int attrLen) {
1243 attachTypeAnnotations(sym);
1244 }
1245 },
1246
1247 // The following attributes for a Code attribute are not currently handled
1248 // StackMapTable
1249 // SourceDebugExtension
1250 // LineNumberTable
1251 // LocalVariableTypeTable
1252
1253 // standard v52 attributes
1254
1255 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1256 protected void read(Symbol sym, int attrlen) {
1257 int newbp = bp + attrlen;
1258 if (saveParameterNames) {
1259 sawMethodParameters = true;
1260 int numEntries = nextByte();
1261 parameterNameIndices = new int[numEntries];
1262 haveParameterNameIndices = true;
1263 for (int i = 0; i < numEntries; i++) {
1264 int nameIndex = nextChar();
1265 int flags = nextChar();
1266 parameterNameIndices[i] = nameIndex;
1267 }
1268 }
1269 bp = newbp;
1270 }
1271 },
1272
1273 // standard v53 attributes
1274
1275 new AttributeReader(names.Module, V53, CLASS_ATTRIBUTE) {
1276 @Override
1277 protected boolean accepts(AttributeKind kind) {
1278 return super.accepts(kind) && allowModules;
1279 }
1280 protected void read(Symbol sym, int attrLen) {
1281 if (sym.kind == TYP && sym.owner.kind == MDL) {
1282 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1283 ListBuffer<Directive> directives = new ListBuffer<>();
1284
1285 // FIXME: temporary compatibility code
1286 if (readNewModuleAttribute) {
1287 Name moduleName = readModuleName(nextChar());
1288 if (currentModule.name != moduleName) {
1289 throw badClassFile("module.name.mismatch", moduleName, currentModule.name);
1290 }
1291 }
1292
1293 msym.flags.addAll(readModuleFlags(nextChar()));
1294
1295 ListBuffer<RequiresDirective> requires = new ListBuffer<>();
1296 int nrequires = nextChar();
1297 for (int i = 0; i < nrequires; i++) {
1298 ModuleSymbol rsym = syms.enterModule(readModuleName(nextChar()));
1299 Set<RequiresFlag> flags = readRequiresFlags(nextChar());
1300 requires.add(new RequiresDirective(rsym, flags));
1301 }
1302 msym.requires = requires.toList();
1303 directives.addAll(msym.requires);
1304
1305 ListBuffer<ExportsDirective> exports = new ListBuffer<>();
1306 int nexports = nextChar();
1307 for (int i = 0; i < nexports; i++) {
1308 Name n = readName(nextChar());
1309 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n)));
1310 Set<ExportsFlag> flags = readExportsFlags(nextChar());
1311 int nto = nextChar();
1312 List<ModuleSymbol> to;
1313 if (nto == 0) {
1314 to = null;
1315 } else {
1316 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1317 for (int t = 0; t < nto; t++)
1318 lb.append(syms.enterModule(readModuleName(nextChar())));
1319 to = lb.toList();
1320 }
1321 exports.add(new ExportsDirective(p, to, flags));
1322 }
1323 msym.exports = exports.toList();
1324 directives.addAll(msym.exports);
1325 ListBuffer<OpensDirective> opens = new ListBuffer<>();
1326 int nopens = nextChar();
1327 if (nopens != 0 && msym.flags.contains(ModuleFlags.OPEN)) {
1328 throw badClassFile("module.non.zero.opens", currentModule.name);
1329 }
1330 for (int i = 0; i < nopens; i++) {
1331 Name n = readName(nextChar());
1332 PackageSymbol p = syms.enterPackage(currentModule, names.fromUtf(internalize(n)));
1333 Set<OpensFlag> flags = readOpensFlags(nextChar());
1334 int nto = nextChar();
1335 List<ModuleSymbol> to;
1336 if (nto == 0) {
1337 to = null;
1338 } else {
1339 ListBuffer<ModuleSymbol> lb = new ListBuffer<>();
1340 for (int t = 0; t < nto; t++)
1341 lb.append(syms.enterModule(readModuleName(nextChar())));
1342 to = lb.toList();
1343 }
1344 opens.add(new OpensDirective(p, to, flags));
1345 }
1346 msym.opens = opens.toList();
1347 directives.addAll(msym.opens);
1348
1349 msym.directives = directives.toList();
1350
1351 ListBuffer<InterimUsesDirective> uses = new ListBuffer<>();
1352 int nuses = nextChar();
1353 for (int i = 0; i < nuses; i++) {
1354 Name srvc = readClassName(nextChar());
1355 uses.add(new InterimUsesDirective(srvc));
1356 }
1357 interimUses = uses.toList();
1358
1359 ListBuffer<InterimProvidesDirective> provides = new ListBuffer<>();
1360 int nprovides = nextChar();
1361 for (int p = 0; p < nprovides; p++) {
1362 Name srvc = readClassName(nextChar());
1363 int nimpls = nextChar();
1364 ListBuffer<Name> impls = new ListBuffer<>();
1365 for (int i = 0; i < nimpls; i++) {
1366 impls.append(readClassName(nextChar()));
1367 provides.add(new InterimProvidesDirective(srvc, impls.toList()));
1368 }
1369 }
1370 interimProvides = provides.toList();
1371 }
1372 }
1373 },
1374
1375 new AttributeReader(names.ModuleVersion, V53, CLASS_ATTRIBUTE) {
1376 @Override
1377 protected boolean accepts(AttributeKind kind) {
1378 return super.accepts(kind) && allowModules;
1379 }
1380 protected void read(Symbol sym, int attrLen) {
1381 if (sym.kind == TYP && sym.owner.kind == MDL) {
1382 ModuleSymbol msym = (ModuleSymbol) sym.owner;
1383 msym.version = readName(nextChar());
1384 }
1385 }
1386 },
1387 };
1388
1389 for (AttributeReader r: readers)
1390 attributeReaders.put(r.name, r);
1391 }
1392
1393 protected void readEnclosingMethodAttr(Symbol sym) {
1394 // sym is a nested class with an "Enclosing Method" attribute
1395 // remove sym from it's current owners scope and place it in
1396 // the scope specified by the attribute
1397 sym.owner.members().remove(sym);
1398 ClassSymbol self = (ClassSymbol)sym;
1399 ClassSymbol c = readClassSymbol(nextChar());
1400 NameAndType nt = readNameAndType(nextChar());
1401
1402 if (c.members_field == null)
1403 throw badClassFile("bad.enclosing.class", self, c);
1404
1405 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1406 if (nt != null && m == null)
1407 throw badEnclosingMethod(self);
1408
1409 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1410 self.owner = m != null ? m : c;
1411 if (self.name.isEmpty())
1412 self.fullname = names.empty;
1413 else
1414 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1415
1416 if (m != null) {
1417 ((ClassType)sym.type).setEnclosingType(m.type);
1418 } else if ((self.flags_field & STATIC) == 0) {
1419 ((ClassType)sym.type).setEnclosingType(c.type);
1420 } else {
1421 ((ClassType)sym.type).setEnclosingType(Type.noType);
1422 }
1423 enterTypevars(self, self.type);
1424 if (!missingTypeVariables.isEmpty()) {
1425 ListBuffer<Type> typeVars = new ListBuffer<>();
1426 for (Type typevar : missingTypeVariables) {
1427 typeVars.append(findTypeVar(typevar.tsym.name));
1428 }
1429 foundTypeVariables = typeVars.toList();
1430 } else {
1431 foundTypeVariables = List.nil();
1432 }
1433 }
1434
1435 // See java.lang.Class
1436 private Name simpleBinaryName(Name self, Name enclosing) {
1437 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1438 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1439 throw badClassFile("bad.enclosing.method", self);
1440 int index = 1;
1441 while (index < simpleBinaryName.length() &&
1442 isAsciiDigit(simpleBinaryName.charAt(index)))
1443 index++;
1444 return names.fromString(simpleBinaryName.substring(index));
1445 }
1446
1447 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1448 if (nt == null)
1449 return null;
1450
1451 MethodType type = nt.uniqueType.type.asMethodType();
1452
1453 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1454 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1455 return (MethodSymbol)sym;
1456 }
1457
1458 if (nt.name != names.init)
1459 // not a constructor
1460 return null;
1461 if ((flags & INTERFACE) != 0)
1462 // no enclosing instance
1463 return null;
1464 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1465 // no parameters
1466 return null;
1467
1468 // A constructor of an inner class.
1469 // Remove the first argument (the enclosing instance)
1470 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1471 nt.uniqueType.type.getReturnType(),
1472 nt.uniqueType.type.getThrownTypes(),
1473 syms.methodClass));
1474 // Try searching again
1475 return findMethod(nt, scope, flags);
1476 }
1477
1478 /** Similar to Types.isSameType but avoids completion */
1479 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1480 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1481 .prepend(types.erasure(mt1.getReturnType()));
1482 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1483 while (!types1.isEmpty() && !types2.isEmpty()) {
1484 if (types1.head.tsym != types2.head.tsym)
1485 return false;
1486 types1 = types1.tail;
1487 types2 = types2.tail;
1488 }
1489 return types1.isEmpty() && types2.isEmpty();
1490 }
1491
1492 /**
1493 * Character.isDigit answers <tt>true</tt> to some non-ascii
1494 * digits. This one does not. <b>copied from java.lang.Class</b>
1495 */
1496 private static boolean isAsciiDigit(char c) {
1497 return '0' <= c && c <= '9';
1498 }
1499
1500 /** Read member attributes.
1501 */
1502 void readMemberAttrs(Symbol sym) {
1503 readAttrs(sym, AttributeKind.MEMBER);
1504 }
1505
1506 void readAttrs(Symbol sym, AttributeKind kind) {
1507 char ac = nextChar();
1508 for (int i = 0; i < ac; i++) {
1509 Name attrName = readName(nextChar());
1510 int attrLen = nextInt();
1511 AttributeReader r = attributeReaders.get(attrName);
1512 if (r != null && r.accepts(kind))
1513 r.read(sym, attrLen);
1514 else {
1515 bp = bp + attrLen;
1516 }
1517 }
1518 }
1519
1520 private boolean readingClassAttr = false;
1521 private List<Type> missingTypeVariables = List.nil();
1522 private List<Type> foundTypeVariables = List.nil();
1523
1524 /** Read class attributes.
1525 */
1526 void readClassAttrs(ClassSymbol c) {
1527 readAttrs(c, AttributeKind.CLASS);
1528 }
1529
1530 /** Read code block.
1531 */
1532 Code readCode(Symbol owner) {
1533 nextChar(); // max_stack
1534 nextChar(); // max_locals
1535 final int code_length = nextInt();
1536 bp += code_length;
1537 final char exception_table_length = nextChar();
1538 bp += exception_table_length * 8;
1539 readMemberAttrs(owner);
1540 return null;
1541 }
1542
1543 /************************************************************************
1544 * Reading Java-language annotations
1545 ***********************************************************************/
1546
1547 /** Attach annotations.
1548 */
1549 void attachAnnotations(final Symbol sym) {
1550 int numAttributes = nextChar();
1551 if (numAttributes != 0) {
1552 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1553 for (int i = 0; i<numAttributes; i++) {
1554 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1555 if (proxy.type.tsym == syms.proprietaryType.tsym)
1556 sym.flags_field |= PROPRIETARY;
1557 else if (proxy.type.tsym == syms.profileType.tsym) {
1558 if (profile != Profile.DEFAULT) {
1559 for (Pair<Name,Attribute> v: proxy.values) {
1560 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1561 Attribute.Constant c = (Attribute.Constant) v.snd;
1562 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1563 sym.flags_field |= NOT_IN_PROFILE;
1564 }
1565 }
1566 }
1567 }
1568 } else {
1569 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1570 target = proxy;
1571 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1572 repeatable = proxy;
1573 } else if (proxy.type.tsym == syms.deprecatedType.tsym) {
1574 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
1575 for (Pair<Name, Attribute> v : proxy.values) {
1576 if (v.fst == names.forRemoval && v.snd instanceof Attribute.Constant) {
1577 Attribute.Constant c = (Attribute.Constant) v.snd;
1578 if (c.type == syms.booleanType && ((Integer) c.value) != 0) {
1579 sym.flags_field |= DEPRECATED_REMOVAL;
1580 }
1581 }
1582 }
1583 }
1584
1585 proxies.append(proxy);
1586 }
1587 }
1588 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1589 }
1590 }
1591
1592 /** Attach parameter annotations.
1593 */
1594 void attachParameterAnnotations(final Symbol method) {
1595 final MethodSymbol meth = (MethodSymbol)method;
1596 int numParameters = buf[bp++] & 0xFF;
1597 List<VarSymbol> parameters = meth.params();
1598 int pnum = 0;
1599 while (parameters.tail != null) {
1600 attachAnnotations(parameters.head);
1601 parameters = parameters.tail;
1602 pnum++;
1603 }
1604 if (pnum != numParameters) {
1605 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1606 }
1607 }
1608
1609 void attachTypeAnnotations(final Symbol sym) {
1610 int numAttributes = nextChar();
1611 if (numAttributes != 0) {
1612 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1613 for (int i = 0; i < numAttributes; i++)
1614 proxies.append(readTypeAnnotation());
1615 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1616 }
1617 }
1618
1619 /** Attach the default value for an annotation element.
1620 */
1621 void attachAnnotationDefault(final Symbol sym) {
1622 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1623 final Attribute value = readAttributeValue();
1624
1625 // The default value is set later during annotation. It might
1626 // be the case that the Symbol sym is annotated _after_ the
1627 // repeating instances that depend on this default value,
1628 // because of this we set an interim value that tells us this
1629 // element (most likely) has a default.
1630 //
1631 // Set interim value for now, reset just before we do this
1632 // properly at annotate time.
1633 meth.defaultValue = value;
1634 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1635 }
1636
1637 Type readTypeOrClassSymbol(int i) {
1638 // support preliminary jsr175-format class files
1639 if (buf[poolIdx[i]] == CONSTANT_Class)
1640 return readClassSymbol(i).type;
1641 return readTypeToProxy(i);
1642 }
1643 Type readEnumType(int i) {
1644 // support preliminary jsr175-format class files
1645 int index = poolIdx[i];
1646 int length = getChar(index + 1);
1647 if (buf[index + length + 2] != ';')
1648 return enterClass(readName(i)).type;
1649 return readTypeToProxy(i);
1650 }
1651 Type readTypeToProxy(int i) {
1652 if (currentModule.module_info == currentOwner) {
1653 int index = poolIdx[i];
1654 return new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1)));
1655 } else {
1656 return readType(i);
1657 }
1658 }
1659
1660 CompoundAnnotationProxy readCompoundAnnotation() {
1661 Type t;
1662 if (currentModule.module_info == currentOwner) {
1663 int index = poolIdx[nextChar()];
1664 t = new ProxyType(Arrays.copyOfRange(buf, index + 3, index + 3 + getChar(index + 1)));
1665 } else {
1666 t = readTypeOrClassSymbol(nextChar());
1667 }
1668 int numFields = nextChar();
1669 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1670 for (int i=0; i<numFields; i++) {
1671 Name name = readName(nextChar());
1672 Attribute value = readAttributeValue();
1673 pairs.append(new Pair<>(name, value));
1674 }
1675 return new CompoundAnnotationProxy(t, pairs.toList());
1676 }
1677
1678 TypeAnnotationProxy readTypeAnnotation() {
1679 TypeAnnotationPosition position = readPosition();
1680 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1681
1682 return new TypeAnnotationProxy(proxy, position);
1683 }
1684
1685 TypeAnnotationPosition readPosition() {
1686 int tag = nextByte(); // TargetType tag is a byte
1687
1688 if (!TargetType.isValidTargetTypeValue(tag))
1689 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1690
1691 TargetType type = TargetType.fromTargetTypeValue(tag);
1692
1693 switch (type) {
1694 // instanceof
1695 case INSTANCEOF: {
1696 final int offset = nextChar();
1697 final TypeAnnotationPosition position =
1698 TypeAnnotationPosition.instanceOf(readTypePath());
1699 position.offset = offset;
1700 return position;
1701 }
1702 // new expression
1703 case NEW: {
1704 final int offset = nextChar();
1705 final TypeAnnotationPosition position =
1706 TypeAnnotationPosition.newObj(readTypePath());
1707 position.offset = offset;
1708 return position;
1709 }
1710 // constructor/method reference receiver
1711 case CONSTRUCTOR_REFERENCE: {
1712 final int offset = nextChar();
1713 final TypeAnnotationPosition position =
1714 TypeAnnotationPosition.constructorRef(readTypePath());
1715 position.offset = offset;
1716 return position;
1717 }
1718 case METHOD_REFERENCE: {
1719 final int offset = nextChar();
1720 final TypeAnnotationPosition position =
1721 TypeAnnotationPosition.methodRef(readTypePath());
1722 position.offset = offset;
1723 return position;
1724 }
1725 // local variable
1726 case LOCAL_VARIABLE: {
1727 final int table_length = nextChar();
1728 final int[] newLvarOffset = new int[table_length];
1729 final int[] newLvarLength = new int[table_length];
1730 final int[] newLvarIndex = new int[table_length];
1731
1732 for (int i = 0; i < table_length; ++i) {
1733 newLvarOffset[i] = nextChar();
1734 newLvarLength[i] = nextChar();
1735 newLvarIndex[i] = nextChar();
1736 }
1737
1738 final TypeAnnotationPosition position =
1739 TypeAnnotationPosition.localVariable(readTypePath());
1740 position.lvarOffset = newLvarOffset;
1741 position.lvarLength = newLvarLength;
1742 position.lvarIndex = newLvarIndex;
1743 return position;
1744 }
1745 // resource variable
1746 case RESOURCE_VARIABLE: {
1747 final int table_length = nextChar();
1748 final int[] newLvarOffset = new int[table_length];
1749 final int[] newLvarLength = new int[table_length];
1750 final int[] newLvarIndex = new int[table_length];
1751
1752 for (int i = 0; i < table_length; ++i) {
1753 newLvarOffset[i] = nextChar();
1754 newLvarLength[i] = nextChar();
1755 newLvarIndex[i] = nextChar();
1756 }
1757
1758 final TypeAnnotationPosition position =
1759 TypeAnnotationPosition.resourceVariable(readTypePath());
1760 position.lvarOffset = newLvarOffset;
1761 position.lvarLength = newLvarLength;
1762 position.lvarIndex = newLvarIndex;
1763 return position;
1764 }
1765 // exception parameter
1766 case EXCEPTION_PARAMETER: {
1767 final int exception_index = nextChar();
1768 final TypeAnnotationPosition position =
1769 TypeAnnotationPosition.exceptionParameter(readTypePath());
1770 position.setExceptionIndex(exception_index);
1771 return position;
1772 }
1773 // method receiver
1774 case METHOD_RECEIVER:
1775 return TypeAnnotationPosition.methodReceiver(readTypePath());
1776 // type parameter
1777 case CLASS_TYPE_PARAMETER: {
1778 final int parameter_index = nextByte();
1779 return TypeAnnotationPosition
1780 .typeParameter(readTypePath(), parameter_index);
1781 }
1782 case METHOD_TYPE_PARAMETER: {
1783 final int parameter_index = nextByte();
1784 return TypeAnnotationPosition
1785 .methodTypeParameter(readTypePath(), parameter_index);
1786 }
1787 // type parameter bound
1788 case CLASS_TYPE_PARAMETER_BOUND: {
1789 final int parameter_index = nextByte();
1790 final int bound_index = nextByte();
1791 return TypeAnnotationPosition
1792 .typeParameterBound(readTypePath(), parameter_index,
1793 bound_index);
1794 }
1795 case METHOD_TYPE_PARAMETER_BOUND: {
1796 final int parameter_index = nextByte();
1797 final int bound_index = nextByte();
1798 return TypeAnnotationPosition
1799 .methodTypeParameterBound(readTypePath(), parameter_index,
1800 bound_index);
1801 }
1802 // class extends or implements clause
1803 case CLASS_EXTENDS: {
1804 final int type_index = nextChar();
1805 return TypeAnnotationPosition.classExtends(readTypePath(),
1806 type_index);
1807 }
1808 // throws
1809 case THROWS: {
1810 final int type_index = nextChar();
1811 return TypeAnnotationPosition.methodThrows(readTypePath(),
1812 type_index);
1813 }
1814 // method parameter
1815 case METHOD_FORMAL_PARAMETER: {
1816 final int parameter_index = nextByte();
1817 return TypeAnnotationPosition.methodParameter(readTypePath(),
1818 parameter_index);
1819 }
1820 // type cast
1821 case CAST: {
1822 final int offset = nextChar();
1823 final int type_index = nextByte();
1824 final TypeAnnotationPosition position =
1825 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1826 position.offset = offset;
1827 return position;
1828 }
1829 // method/constructor/reference type argument
1830 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1831 final int offset = nextChar();
1832 final int type_index = nextByte();
1833 final TypeAnnotationPosition position = TypeAnnotationPosition
1834 .constructorInvocationTypeArg(readTypePath(), type_index);
1835 position.offset = offset;
1836 return position;
1837 }
1838 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1839 final int offset = nextChar();
1840 final int type_index = nextByte();
1841 final TypeAnnotationPosition position = TypeAnnotationPosition
1842 .methodInvocationTypeArg(readTypePath(), type_index);
1843 position.offset = offset;
1844 return position;
1845 }
1846 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1847 final int offset = nextChar();
1848 final int type_index = nextByte();
1849 final TypeAnnotationPosition position = TypeAnnotationPosition
1850 .constructorRefTypeArg(readTypePath(), type_index);
1851 position.offset = offset;
1852 return position;
1853 }
1854 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1855 final int offset = nextChar();
1856 final int type_index = nextByte();
1857 final TypeAnnotationPosition position = TypeAnnotationPosition
1858 .methodRefTypeArg(readTypePath(), type_index);
1859 position.offset = offset;
1860 return position;
1861 }
1862 // We don't need to worry about these
1863 case METHOD_RETURN:
1864 return TypeAnnotationPosition.methodReturn(readTypePath());
1865 case FIELD:
1866 return TypeAnnotationPosition.field(readTypePath());
1867 case UNKNOWN:
1868 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1869 default:
1870 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1871 }
1872 }
1873
1874 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1875 int len = nextByte();
1876 ListBuffer<Integer> loc = new ListBuffer<>();
1877 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1878 loc = loc.append(nextByte());
1879
1880 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1881
1882 }
1883
1884 Attribute readAttributeValue() {
1885 char c = (char) buf[bp++];
1886 switch (c) {
1887 case 'B':
1888 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1889 case 'C':
1890 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1891 case 'D':
1892 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1893 case 'F':
1894 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1895 case 'I':
1896 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1897 case 'J':
1898 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1899 case 'S':
1900 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1901 case 'Z':
1902 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1903 case 's':
1904 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1905 case 'e':
1906 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1907 case 'c':
1908 return new ClassAttributeProxy(readTypeOrClassSymbol(nextChar()));
1909 case '[': {
1910 int n = nextChar();
1911 ListBuffer<Attribute> l = new ListBuffer<>();
1912 for (int i=0; i<n; i++)
1913 l.append(readAttributeValue());
1914 return new ArrayAttributeProxy(l.toList());
1915 }
1916 case '@':
1917 return readCompoundAnnotation();
1918 default:
1919 throw new AssertionError("unknown annotation tag '" + c + "'");
1920 }
1921 }
1922
1923 interface ProxyVisitor extends Attribute.Visitor {
1924 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1925 void visitClassAttributeProxy(ClassAttributeProxy proxy);
1926 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1927 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1928 }
1929
1930 static class EnumAttributeProxy extends Attribute {
1931 Type enumType;
1932 Name enumerator;
1933 public EnumAttributeProxy(Type enumType, Name enumerator) {
1934 super(null);
1935 this.enumType = enumType;
1936 this.enumerator = enumerator;
1937 }
1938 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1939 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1940 public String toString() {
1941 return "/*proxy enum*/" + enumType + "." + enumerator;
1942 }
1943 }
1944
1945 static class ClassAttributeProxy extends Attribute {
1946 Type classType;
1947 public ClassAttributeProxy(Type classType) {
1948 super(null);
1949 this.classType = classType;
1950 }
1951 public void accept(Visitor v) { ((ProxyVisitor)v).visitClassAttributeProxy(this); }
1952 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1953 public String toString() {
1954 return "/*proxy class*/" + classType + ".class";
1955 }
1956 }
1957
1958 static class ArrayAttributeProxy extends Attribute {
1959 List<Attribute> values;
1960 ArrayAttributeProxy(List<Attribute> values) {
1961 super(null);
1962 this.values = values;
1963 }
1964 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1965 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1966 public String toString() {
1967 return "{" + values + "}";
1968 }
1969 }
1970
1971 /** A temporary proxy representing a compound attribute.
1972 */
1973 static class CompoundAnnotationProxy extends Attribute {
1974 final List<Pair<Name,Attribute>> values;
1975 public CompoundAnnotationProxy(Type type,
1976 List<Pair<Name,Attribute>> values) {
1977 super(type);
1978 this.values = values;
1979 }
1980 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1981 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1982 public String toString() {
1983 StringBuilder buf = new StringBuilder();
1984 buf.append("@");
1985 buf.append(type.tsym.getQualifiedName());
1986 buf.append("/*proxy*/{");
1987 boolean first = true;
1988 for (List<Pair<Name,Attribute>> v = values;
1989 v.nonEmpty(); v = v.tail) {
1990 Pair<Name,Attribute> value = v.head;
1991 if (!first) buf.append(",");
1992 first = false;
1993 buf.append(value.fst);
1994 buf.append("=");
1995 buf.append(value.snd);
1996 }
1997 buf.append("}");
1998 return buf.toString();
1999 }
2000 }
2001
2002 /** A temporary proxy representing a type annotation.
2003 */
2004 static class TypeAnnotationProxy {
2005 final CompoundAnnotationProxy compound;
2006 final TypeAnnotationPosition position;
2007 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
2008 TypeAnnotationPosition position) {
2009 this.compound = compound;
2010 this.position = position;
2011 }
2012 }
2013
2014 class AnnotationDeproxy implements ProxyVisitor {
2015 private ClassSymbol requestingOwner;
2016
2017 AnnotationDeproxy(ClassSymbol owner) {
2018 this.requestingOwner = owner;
2019 }
2020
2021 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
2022 // also must fill in types!!!!
2023 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
2024 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
2025 buf.append(deproxyCompound(l.head));
2026 }
2027 return buf.toList();
2028 }
2029
2030 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
2031 Type annotationType = resolvePossibleProxyType(a.type);
2032 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
2033 for (List<Pair<Name,Attribute>> l = a.values;
2034 l.nonEmpty();
2035 l = l.tail) {
2036 MethodSymbol meth = findAccessMethod(annotationType, l.head.fst);
2037 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
2038 }
2039 return new Attribute.Compound(annotationType, buf.toList());
2040 }
2041
2042 MethodSymbol findAccessMethod(Type container, Name name) {
2043 CompletionFailure failure = null;
2044 try {
2045 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
2046 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
2047 return (MethodSymbol) sym;
2048 }
2049 } catch (CompletionFailure ex) {
2050 failure = ex;
2051 }
2052 // The method wasn't found: emit a warning and recover
2053 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
2054 try {
2055 if (lintClassfile) {
2056 if (failure == null) {
2057 log.warning("annotation.method.not.found",
2058 container,
2059 name);
2060 } else {
2061 log.warning("annotation.method.not.found.reason",
2062 container,
2063 name,
2064 failure.getDetailValue());//diagnostic, if present
2065 }
2066 }
2067 } finally {
2068 log.useSource(prevSource);
2069 }
2070 // Construct a new method type and symbol. Use bottom
2071 // type (typeof null) as return type because this type is
2072 // a subtype of all reference types and can be converted
2073 // to primitive types by unboxing.
2074 MethodType mt = new MethodType(List.<Type>nil(),
2075 syms.botType,
2076 List.<Type>nil(),
2077 syms.methodClass);
2078 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
2079 }
2080
2081 Attribute result;
2082 Type type;
2083 Attribute deproxy(Type t, Attribute a) {
2084 Type oldType = type;
2085 try {
2086 type = t;
2087 a.accept(this);
2088 return result;
2089 } finally {
2090 type = oldType;
2091 }
2092 }
2093
2094 // implement Attribute.Visitor below
2095
2096 public void visitConstant(Attribute.Constant value) {
2097 // assert value.type == type;
2098 result = value;
2099 }
2100
2101 public void visitClass(Attribute.Class clazz) {
2102 result = clazz;
2103 }
2104
2105 public void visitEnum(Attribute.Enum e) {
2106 throw new AssertionError(); // shouldn't happen
2107 }
2108
2109 public void visitCompound(Attribute.Compound compound) {
2110 throw new AssertionError(); // shouldn't happen
2111 }
2112
2113 public void visitArray(Attribute.Array array) {
2114 throw new AssertionError(); // shouldn't happen
2115 }
2116
2117 public void visitError(Attribute.Error e) {
2118 throw new AssertionError(); // shouldn't happen
2119 }
2120
2121 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
2122 // type.tsym.flatName() should == proxy.enumFlatName
2123 Type enumType = resolvePossibleProxyType(proxy.enumType);
2124 TypeSymbol enumTypeSym = enumType.tsym;
2125 VarSymbol enumerator = null;
2126 CompletionFailure failure = null;
2127 try {
2128 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
2129 if (sym.kind == VAR) {
2130 enumerator = (VarSymbol)sym;
2131 break;
2132 }
2133 }
2134 }
2135 catch (CompletionFailure ex) {
2136 failure = ex;
2137 }
2138 if (enumerator == null) {
2139 if (failure != null) {
2140 log.warning("unknown.enum.constant.reason",
2141 currentClassFile, enumTypeSym, proxy.enumerator,
2142 failure.getDiagnostic());
2143 } else {
2144 log.warning("unknown.enum.constant",
2145 currentClassFile, enumTypeSym, proxy.enumerator);
2146 }
2147 result = new Attribute.Enum(enumTypeSym.type,
2148 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
2149 } else {
2150 result = new Attribute.Enum(enumTypeSym.type, enumerator);
2151 }
2152 }
2153
2154 @Override
2155 public void visitClassAttributeProxy(ClassAttributeProxy proxy) {
2156 Type classType = resolvePossibleProxyType(proxy.classType);
2157 result = new Attribute.Class(types, classType);
2158 }
2159
2160 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
2161 int length = proxy.values.length();
2162 Attribute[] ats = new Attribute[length];
2163 Type elemtype = types.elemtype(type);
2164 int i = 0;
2165 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
2166 ats[i++] = deproxy(elemtype, p.head);
2167 }
2168 result = new Attribute.Array(type, ats);
2169 }
2170
2171 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
2172 result = deproxyCompound(proxy);
2173 }
2174
2175 Type resolvePossibleProxyType(Type t) {
2176 if (t instanceof ProxyType) {
2177 Assert.check(requestingOwner.owner.kind == MDL);
2178 ModuleSymbol prevCurrentModule = currentModule;
2179 currentModule = (ModuleSymbol) requestingOwner.owner;
2180 try {
2181 return ((ProxyType) t).resolve();
2182 } finally {
2183 currentModule = prevCurrentModule;
2184 }
2185 } else {
2186 return t;
2187 }
2188 }
2189 }
2190
2191 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
2192 final MethodSymbol sym;
2193 final Attribute value;
2194 final JavaFileObject classFile = currentClassFile;
2195
2196 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
2197 super(currentOwner.kind == MTH
2198 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2199 this.sym = sym;
2200 this.value = value;
2201 }
2202
2203 @Override
2204 public void run() {
2205 JavaFileObject previousClassFile = currentClassFile;
2206 try {
2207 // Reset the interim value set earlier in
2208 // attachAnnotationDefault().
2209 sym.defaultValue = null;
2210 currentClassFile = classFile;
2211 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
2212 } finally {
2213 currentClassFile = previousClassFile;
2214 }
2215 }
2216
2217 @Override
2218 public String toString() {
2219 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
2220 }
2221 }
2222
2223 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
2224 final Symbol sym;
2225 final List<CompoundAnnotationProxy> l;
2226 final JavaFileObject classFile;
2227
2228 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
2229 super(currentOwner.kind == MTH
2230 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
2231 if (sym.kind == TYP && sym.owner.kind == MDL) {
2232 this.sym = sym.owner;
2233 } else {
2234 this.sym = sym;
2235 }
2236 this.l = l;
2237 this.classFile = currentClassFile;
2238 }
2239
2240 @Override
2241 public void run() {
2242 JavaFileObject previousClassFile = currentClassFile;
2243 try {
2244 currentClassFile = classFile;
2245 List<Attribute.Compound> newList = deproxyCompoundList(l);
2246 for (Attribute.Compound attr : newList) {
2247 if (attr.type.tsym == syms.deprecatedType.tsym) {
2248 sym.flags_field |= (DEPRECATED | DEPRECATED_ANNOTATION);
2249 Attribute forRemoval = attr.member(names.forRemoval);
2250 if (forRemoval instanceof Attribute.Constant) {
2251 Attribute.Constant c = (Attribute.Constant) forRemoval;
2252 if (c.type == syms.booleanType && ((Integer) c.value) != 0) {
2253 sym.flags_field |= DEPRECATED_REMOVAL;
2254 }
2255 }
2256 }
2257 }
2258 if (sym.annotationsPendingCompletion()) {
2259 sym.setDeclarationAttributes(newList);
2260 } else {
2261 sym.appendAttributes(newList);
2262 }
2263 } finally {
2264 currentClassFile = previousClassFile;
2265 }
2266 }
2267
2268 @Override
2269 public String toString() {
2270 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
2271 }
2272 }
2273
2274 class TypeAnnotationCompleter extends AnnotationCompleter {
2275
2276 List<TypeAnnotationProxy> proxies;
2277
2278 TypeAnnotationCompleter(Symbol sym,
2279 List<TypeAnnotationProxy> proxies) {
2280 super(sym, List.<CompoundAnnotationProxy>nil());
2281 this.proxies = proxies;
2282 }
2283
2284 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
2285 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
2286 for (TypeAnnotationProxy proxy: proxies) {
2287 Attribute.Compound compound = deproxyCompound(proxy.compound);
2288 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
2289 buf.add(typeCompound);
2290 }
2291 return buf.toList();
2292 }
2293
2294 @Override
2295 public void run() {
2296 JavaFileObject previousClassFile = currentClassFile;
2297 try {
2298 currentClassFile = classFile;
2299 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
2300 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
2301 } finally {
2302 currentClassFile = previousClassFile;
2303 }
2304 }
2305 }
2306
2307
2308 /************************************************************************
2309 * Reading Symbols
2310 ***********************************************************************/
2311
2312 /** Read a field.
2313 */
2314 VarSymbol readField() {
2315 long flags = adjustFieldFlags(nextChar());
2316 Name name = readName(nextChar());
2317 Type type = readType(nextChar());
2318 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2319 readMemberAttrs(v);
2320 return v;
2321 }
2322
2323 /** Read a method.
2324 */
2325 MethodSymbol readMethod() {
2326 long flags = adjustMethodFlags(nextChar());
2327 Name name = readName(nextChar());
2328 Type type = readType(nextChar());
2329 if (currentOwner.isInterface() &&
2330 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2331 if (majorVersion > Version.V52.major ||
2332 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2333 if ((flags & STATIC) == 0) {
2334 currentOwner.flags_field |= DEFAULT;
2335 flags |= DEFAULT | ABSTRACT;
2336 }
2337 } else {
2338 //protect against ill-formed classfiles
2339 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2340 Integer.toString(majorVersion),
2341 Integer.toString(minorVersion));
2342 }
2343 }
2344 if (name == names.init && currentOwner.hasOuterInstance()) {
2345 // Sometimes anonymous classes don't have an outer
2346 // instance, however, there is no reliable way to tell so
2347 // we never strip this$n
2348 // ditto for local classes. Local classes that have an enclosing method set
2349 // won't pass the "hasOuterInstance" check above, but those that don't have an
2350 // enclosing method (i.e. from initializers) will pass that check.
2351 boolean local = !currentOwner.owner.members().includes(currentOwner, LookupKind.NON_RECURSIVE);
2352 if (!currentOwner.name.isEmpty() && !local)
2353 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2354 type.getReturnType(),
2355 type.getThrownTypes(),
2356 syms.methodClass);
2357 }
2358 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2359 if (types.isSignaturePolymorphic(m)) {
2360 m.flags_field |= SIGNATURE_POLYMORPHIC;
2361 }
2362 if (saveParameterNames)
2363 initParameterNames(m);
2364 Symbol prevOwner = currentOwner;
2365 currentOwner = m;
2366 try {
2367 readMemberAttrs(m);
2368 } finally {
2369 currentOwner = prevOwner;
2370 }
2371 if (saveParameterNames)
2372 setParameterNames(m, type);
2373
2374 if ((flags & VARARGS) != 0) {
2375 final Type last = type.getParameterTypes().last();
2376 if (last == null || !last.hasTag(ARRAY)) {
2377 m.flags_field &= ~VARARGS;
2378 throw badClassFile("malformed.vararg.method", m);
2379 }
2380 }
2381
2382 return m;
2383 }
2384
2385 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2386 boolean isVarargs = (flags & VARARGS) != 0;
2387 if (isVarargs) {
2388 Type varargsElem = args.last();
2389 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2390 for (Type t : args) {
2391 adjustedArgs.append(t != varargsElem ?
2392 t :
2393 ((ArrayType)t).makeVarargs());
2394 }
2395 args = adjustedArgs.toList();
2396 }
2397 return args.tail;
2398 }
2399
2400 /**
2401 * Init the parameter names array.
2402 * Parameter names are currently inferred from the names in the
2403 * LocalVariableTable attributes of a Code attribute.
2404 * (Note: this means parameter names are currently not available for
2405 * methods without a Code attribute.)
2406 * This method initializes an array in which to store the name indexes
2407 * of parameter names found in LocalVariableTable attributes. It is
2408 * slightly supersized to allow for additional slots with a start_pc of 0.
2409 */
2410 void initParameterNames(MethodSymbol sym) {
2411 // make allowance for synthetic parameters.
2412 final int excessSlots = 4;
2413 int expectedParameterSlots =
2414 Code.width(sym.type.getParameterTypes()) + excessSlots;
2415 if (parameterNameIndices == null
2416 || parameterNameIndices.length < expectedParameterSlots) {
2417 parameterNameIndices = new int[expectedParameterSlots];
2418 } else
2419 Arrays.fill(parameterNameIndices, 0);
2420 haveParameterNameIndices = false;
2421 sawMethodParameters = false;
2422 }
2423
2424 /**
2425 * Set the parameter names for a symbol from the name index in the
2426 * parameterNameIndicies array. The type of the symbol may have changed
2427 * while reading the method attributes (see the Signature attribute).
2428 * This may be because of generic information or because anonymous
2429 * synthetic parameters were added. The original type (as read from
2430 * the method descriptor) is used to help guess the existence of
2431 * anonymous synthetic parameters.
2432 * On completion, sym.savedParameter names will either be null (if
2433 * no parameter names were found in the class file) or will be set to a
2434 * list of names, one per entry in sym.type.getParameterTypes, with
2435 * any missing names represented by the empty name.
2436 */
2437 void setParameterNames(MethodSymbol sym, Type jvmType) {
2438 // if no names were found in the class file, there's nothing more to do
2439 if (!haveParameterNameIndices)
2440 return;
2441 // If we get parameter names from MethodParameters, then we
2442 // don't need to skip.
2443 int firstParam = 0;
2444 if (!sawMethodParameters) {
2445 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2446 // the code in readMethod may have skipped the first
2447 // parameter when setting up the MethodType. If so, we
2448 // make a corresponding allowance here for the position of
2449 // the first parameter. Note that this assumes the
2450 // skipped parameter has a width of 1 -- i.e. it is not
2451 // a double width type (long or double.)
2452 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2453 // Sometimes anonymous classes don't have an outer
2454 // instance, however, there is no reliable way to tell so
2455 // we never strip this$n
2456 if (!currentOwner.name.isEmpty())
2457 firstParam += 1;
2458 }
2459
2460 if (sym.type != jvmType) {
2461 // reading the method attributes has caused the
2462 // symbol's type to be changed. (i.e. the Signature
2463 // attribute.) This may happen if there are hidden
2464 // (synthetic) parameters in the descriptor, but not
2465 // in the Signature. The position of these hidden
2466 // parameters is unspecified; for now, assume they are
2467 // at the beginning, and so skip over them. The
2468 // primary case for this is two hidden parameters
2469 // passed into Enum constructors.
2470 int skip = Code.width(jvmType.getParameterTypes())
2471 - Code.width(sym.type.getParameterTypes());
2472 firstParam += skip;
2473 }
2474 }
2475 List<Name> paramNames = List.nil();
2476 int index = firstParam;
2477 for (Type t: sym.type.getParameterTypes()) {
2478 int nameIdx = (index < parameterNameIndices.length
2479 ? parameterNameIndices[index] : 0);
2480 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2481 paramNames = paramNames.prepend(name);
2482 index += Code.width(t);
2483 }
2484 sym.savedParameterNames = paramNames.reverse();
2485 }
2486
2487 /**
2488 * skip n bytes
2489 */
2490 void skipBytes(int n) {
2491 bp = bp + n;
2492 }
2493
2494 /** Skip a field or method
2495 */
2496 void skipMember() {
2497 bp = bp + 6;
2498 char ac = nextChar();
2499 for (int i = 0; i < ac; i++) {
2500 bp = bp + 2;
2501 int attrLen = nextInt();
2502 bp = bp + attrLen;
2503 }
2504 }
2505
2506 void skipInnerClasses() {
2507 int n = nextChar();
2508 for (int i = 0; i < n; i++) {
2509 nextChar();
2510 nextChar();
2511 nextChar();
2512 nextChar();
2513 }
2514 }
2515
2516 /** Enter type variables of this classtype and all enclosing ones in
2517 * `typevars'.
2518 */
2519 protected void enterTypevars(Symbol sym, Type t) {
2520 if (t.getEnclosingType() != null) {
2521 if (!t.getEnclosingType().hasTag(TypeTag.NONE)) {
2522 enterTypevars(sym.owner, t.getEnclosingType());
2523 }
2524 } else if (sym.kind == MTH && !sym.isStatic()) {
2525 enterTypevars(sym.owner, sym.owner.type);
2526 }
2527 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail) {
2528 typevars.enter(xs.head.tsym);
2529 }
2530 }
2531
2532 protected ClassSymbol enterClass(Name name) {
2533 return syms.enterClass(currentModule, name);
2534 }
2535
2536 protected ClassSymbol enterClass(Name name, TypeSymbol owner) {
2537 return syms.enterClass(currentModule, name, owner);
2538 }
2539
2540 /** Read contents of a given class symbol `c'. Both external and internal
2541 * versions of an inner class are read.
2542 */
2543 void readClass(ClassSymbol c) {
2544 ClassType ct = (ClassType)c.type;
2545
2546 // allocate scope for members
2547 c.members_field = WriteableScope.create(c);
2548
2549 // prepare type variable table
2550 typevars = typevars.dup(currentOwner);
2551 if (ct.getEnclosingType().hasTag(CLASS))
2552 enterTypevars(c.owner, ct.getEnclosingType());
2553
2554 // read flags, or skip if this is an inner class
2555 long f = nextChar();
2556 long flags = adjustClassFlags(f);
2557 if ((flags & MODULE) == 0) {
2558 if (c.owner.kind == PCK) c.flags_field = flags;
2559 // read own class name and check that it matches
2560 currentModule = c.packge().modle;
2561 ClassSymbol self = readClassSymbol(nextChar());
2562 if (c != self) {
2563 throw badClassFile("class.file.wrong.class",
2564 self.flatname);
2565 }
2566 } else {
2567 c.flags_field = flags;
2568 currentModule = (ModuleSymbol) c.owner;
2569 int this_class = nextChar();
2570 // FIXME: temporary compatibility code
2571 if (this_class == 0) {
2572 readNewModuleAttribute = true;
2573 } else {
2574 Name modInfoName = readModuleInfoName(this_class);
2575 if (currentModule.name.append('.', names.module_info) != modInfoName) {
2576 //strip trailing .module-info, if exists:
2577 int modInfoStart = modInfoName.length() - names.module_info.length();
2578 modInfoName = modInfoName.subName(modInfoStart, modInfoName.length()) == names.module_info &&
2579 modInfoName.charAt(modInfoStart - 1) == '.' ?
2580 modInfoName.subName(0, modInfoStart - 1) : modInfoName;
2581 throw badClassFile("module.name.mismatch", modInfoName, currentModule.name);
2582 }
2583 readNewModuleAttribute = false;
2584 }
2585 }
2586
2587 // class attributes must be read before class
2588 // skip ahead to read class attributes
2589 int startbp = bp;
2590 nextChar();
2591 char interfaceCount = nextChar();
2592 bp += interfaceCount * 2;
2593 char fieldCount = nextChar();
2594 for (int i = 0; i < fieldCount; i++) skipMember();
2595 char methodCount = nextChar();
2596 for (int i = 0; i < methodCount; i++) skipMember();
2597 readClassAttrs(c);
2598
2599 if (readAllOfClassFile) {
2600 for (int i = 1; i < poolObj.length; i++) readPool(i);
2601 c.pool = new Pool(poolObj.length, poolObj, types);
2602 }
2603
2604 // reset and read rest of classinfo
2605 bp = startbp;
2606 int n = nextChar();
2607 if ((flags & MODULE) != 0 && n > 0) {
2608 throw badClassFile("module.info.invalid.super.class");
2609 }
2610 if (ct.supertype_field == null)
2611 ct.supertype_field = (n == 0)
2612 ? Type.noType
2613 : readClassSymbol(n).erasure(types);
2614 n = nextChar();
2615 List<Type> is = List.nil();
2616 for (int i = 0; i < n; i++) {
2617 Type _inter = readClassSymbol(nextChar()).erasure(types);
2618 is = is.prepend(_inter);
2619 }
2620 if (ct.interfaces_field == null)
2621 ct.interfaces_field = is.reverse();
2622
2623 Assert.check(fieldCount == nextChar());
2624 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2625 Assert.check(methodCount == nextChar());
2626 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2627
2628 typevars = typevars.leave();
2629 }
2630
2631 /** Read inner class info. For each inner/outer pair allocate a
2632 * member class.
2633 */
2634 void readInnerClasses(ClassSymbol c) {
2635 int n = nextChar();
2636 for (int i = 0; i < n; i++) {
2637 nextChar(); // skip inner class symbol
2638 ClassSymbol outer = readClassSymbol(nextChar());
2639 Name name = readName(nextChar());
2640 if (name == null) name = names.empty;
2641 long flags = adjustClassFlags(nextChar());
2642 if (outer != null) { // we have a member class
2643 if (name == names.empty)
2644 name = names.one;
2645 ClassSymbol member = enterClass(name, outer);
2646 if ((flags & STATIC) == 0) {
2647 ((ClassType)member.type).setEnclosingType(outer.type);
2648 if (member.erasure_field != null)
2649 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2650 }
2651 if (c == outer) {
2652 member.flags_field = flags;
2653 enterMember(c, member);
2654 }
2655 }
2656 }
2657 }
2658
2659 /** Read a class definition from the bytes in buf.
2660 */
2661 private void readClassBuffer(ClassSymbol c) throws IOException {
2662 int magic = nextInt();
2663 if (magic != JAVA_MAGIC)
2664 throw badClassFile("illegal.start.of.class.file");
2665
2666 minorVersion = nextChar();
2667 majorVersion = nextChar();
2668 int maxMajor = 53; // Version.MAX().major; //******* TEMPORARY *******
2669 int maxMinor = Version.MAX().minor;
2670 if (majorVersion > maxMajor ||
2671 majorVersion * 1000 + minorVersion <
2672 Version.MIN().major * 1000 + Version.MIN().minor) {
2673 if (majorVersion == (maxMajor + 1))
2674 log.warning("big.major.version",
2675 currentClassFile,
2676 majorVersion,
2677 maxMajor);
2678 else
2679 throw badClassFile("wrong.version",
2680 Integer.toString(majorVersion),
2681 Integer.toString(minorVersion),
2682 Integer.toString(maxMajor),
2683 Integer.toString(maxMinor));
2684 }
2685
2686 indexPool();
2687 if (signatureBuffer.length < bp) {
2688 int ns = Integer.highestOneBit(bp) << 1;
2689 signatureBuffer = new byte[ns];
2690 }
2691 readClass(c);
2692 }
2693
2694 public void readClassFile(ClassSymbol c) {
2695 currentOwner = c;
2696 currentClassFile = c.classfile;
2697 warnedAttrs.clear();
2698 filling = true;
2699 target = null;
2700 repeatable = null;
2701 try {
2702 bp = 0;
2703 buf = readInputStream(buf, c.classfile.openInputStream());
2704 readClassBuffer(c);
2705 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2706 List<Type> missing = missingTypeVariables;
2707 List<Type> found = foundTypeVariables;
2708 missingTypeVariables = List.nil();
2709 foundTypeVariables = List.nil();
2710 interimUses = List.nil();
2711 interimProvides = List.nil();
2712 filling = false;
2713 ClassType ct = (ClassType)currentOwner.type;
2714 ct.supertype_field =
2715 types.subst(ct.supertype_field, missing, found);
2716 ct.interfaces_field =
2717 types.subst(ct.interfaces_field, missing, found);
2718 ct.typarams_field =
2719 types.substBounds(ct.typarams_field, missing, found);
2720 for (List<Type> types = ct.typarams_field; types.nonEmpty(); types = types.tail) {
2721 types.head.tsym.type = types.head;
2722 }
2723 } else if (missingTypeVariables.isEmpty() !=
2724 foundTypeVariables.isEmpty()) {
2725 Name name = missingTypeVariables.head.tsym.name;
2726 throw badClassFile("undecl.type.var", name);
2727 }
2728
2729 if ((c.flags_field & Flags.ANNOTATION) != 0) {
2730 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
2731 } else {
2732 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
2733 }
2734
2735 if (c == currentModule.module_info) {
2736 if (interimUses.nonEmpty() || interimProvides.nonEmpty()) {
2737 Assert.check(currentModule.isCompleted());
2738 currentModule.usesProvidesCompleter =
2739 new UsesProvidesCompleter(currentModule, interimUses, interimProvides);
2740 } else {
2741 currentModule.uses = List.nil();
2742 currentModule.provides = List.nil();
2743 }
2744 }
2745 } catch (IOException ex) {
2746 throw badClassFile("unable.to.access.file", ex.getMessage());
2747 } catch (ArrayIndexOutOfBoundsException ex) {
2748 throw badClassFile("bad.class.file", c.flatname);
2749 } finally {
2750 interimUses = List.nil();
2751 interimProvides = List.nil();
2752 missingTypeVariables = List.nil();
2753 foundTypeVariables = List.nil();
2754 filling = false;
2755 }
2756 }
2757 // where
2758 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2759 try {
2760 buf = ensureCapacity(buf, s.available());
2761 int r = s.read(buf);
2762 int bp = 0;
2763 while (r != -1) {
2764 bp += r;
2765 buf = ensureCapacity(buf, bp);
2766 r = s.read(buf, bp, buf.length - bp);
2767 }
2768 return buf;
2769 } finally {
2770 try {
2771 s.close();
2772 } catch (IOException e) {
2773 /* Ignore any errors, as this stream may have already
2774 * thrown a related exception which is the one that
2775 * should be reported.
2776 */
2777 }
2778 }
2779 }
2780 /*
2781 * ensureCapacity will increase the buffer as needed, taking note that
2782 * the new buffer will always be greater than the needed and never
2783 * exactly equal to the needed size or bp. If equal then the read (above)
2784 * will infinitely loop as buf.length - bp == 0.
2785 */
2786 private static byte[] ensureCapacity(byte[] buf, int needed) {
2787 if (buf.length <= needed) {
2788 byte[] old = buf;
2789 buf = new byte[Integer.highestOneBit(needed) << 1];
2790 System.arraycopy(old, 0, buf, 0, old.length);
2791 }
2792 return buf;
2793 }
2794
2795 /** We can only read a single class file at a time; this
2796 * flag keeps track of when we are currently reading a class
2797 * file.
2798 */
2799 public boolean filling = false;
2800
2801 /************************************************************************
2802 * Adjusting flags
2803 ***********************************************************************/
2804
2805 long adjustFieldFlags(long flags) {
2806 return flags;
2807 }
2808
2809 long adjustMethodFlags(long flags) {
2810 if ((flags & ACC_BRIDGE) != 0) {
2811 flags &= ~ACC_BRIDGE;
2812 flags |= BRIDGE;
2813 }
2814 if ((flags & ACC_VARARGS) != 0) {
2815 flags &= ~ACC_VARARGS;
2816 flags |= VARARGS;
2817 }
2818 return flags;
2819 }
2820
2821 long adjustClassFlags(long flags) {
2822 if ((flags & ACC_MODULE) != 0) {
2823 flags &= ~ACC_MODULE;
2824 flags |= MODULE;
2825 }
2826 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2827 }
2828
2829 /**
2830 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2831 * The attribute is only the last component of the original filename, so is unlikely
2832 * to be valid as is, so operations other than those to access the name throw
2833 * UnsupportedOperationException
2834 */
2835 private static class SourceFileObject implements JavaFileObject {
2836
2837 /** The file's name.
2838 */
2839 private final Name name;
2840 private final Name flatname;
2841
2842 public SourceFileObject(Name name, Name flatname) {
2843 this.name = name;
2844 this.flatname = flatname;
2845 }
2846
2847 @Override @DefinedBy(Api.COMPILER)
2848 public URI toUri() {
2849 try {
2850 return new URI(null, name.toString(), null);
2851 } catch (URISyntaxException e) {
2852 throw new PathFileObject.CannotCreateUriError(name.toString(), e);
2853 }
2854 }
2855
2856 @Override @DefinedBy(Api.COMPILER)
2857 public String getName() {
2858 return name.toString();
2859 }
2860
2861 @Override @DefinedBy(Api.COMPILER)
2862 public JavaFileObject.Kind getKind() {
2863 return BaseFileManager.getKind(getName());
2864 }
2865
2866 @Override @DefinedBy(Api.COMPILER)
2867 public InputStream openInputStream() {
2868 throw new UnsupportedOperationException();
2869 }
2870
2871 @Override @DefinedBy(Api.COMPILER)
2872 public OutputStream openOutputStream() {
2873 throw new UnsupportedOperationException();
2874 }
2875
2876 @Override @DefinedBy(Api.COMPILER)
2877 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2878 throw new UnsupportedOperationException();
2879 }
2880
2881 @Override @DefinedBy(Api.COMPILER)
2882 public Reader openReader(boolean ignoreEncodingErrors) {
2883 throw new UnsupportedOperationException();
2884 }
2885
2886 @Override @DefinedBy(Api.COMPILER)
2887 public Writer openWriter() {
2888 throw new UnsupportedOperationException();
2889 }
2890
2891 @Override @DefinedBy(Api.COMPILER)
2892 public long getLastModified() {
2893 throw new UnsupportedOperationException();
2894 }
2895
2896 @Override @DefinedBy(Api.COMPILER)
2897 public boolean delete() {
2898 throw new UnsupportedOperationException();
2899 }
2900
2901 @Override @DefinedBy(Api.COMPILER)
2902 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2903 return true; // fail-safe mode
2904 }
2905
2906 @Override @DefinedBy(Api.COMPILER)
2907 public NestingKind getNestingKind() {
2908 return null;
2909 }
2910
2911 @Override @DefinedBy(Api.COMPILER)
2912 public Modifier getAccessLevel() {
2913 return null;
2914 }
2915
2916 /**
2917 * Check if two file objects are equal.
2918 * SourceFileObjects are just placeholder objects for the value of a
2919 * SourceFile attribute, and do not directly represent specific files.
2920 * Two SourceFileObjects are equal if their names are equal.
2921 */
2922 @Override
2923 public boolean equals(Object other) {
2924 if (this == other)
2925 return true;
2926
2927 if (!(other instanceof SourceFileObject))
2928 return false;
2929
2930 SourceFileObject o = (SourceFileObject) other;
2931 return name.equals(o.name);
2932 }
2933
2934 @Override
2935 public int hashCode() {
2936 return name.hashCode();
2937 }
2938 }
2939
2940 private class CompleterDeproxy implements AnnotationTypeCompleter {
2941 ClassSymbol proxyOn;
2942 CompoundAnnotationProxy target;
2943 CompoundAnnotationProxy repeatable;
2944
2945 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
2946 CompoundAnnotationProxy repeatable)
2947 {
2948 this.proxyOn = c;
2949 this.target = target;
2950 this.repeatable = repeatable;
2951 }
2952
2953 @Override
2954 public void complete(ClassSymbol sym) {
2955 Assert.check(proxyOn == sym);
2956 Attribute.Compound theTarget = null, theRepeatable = null;
2957 AnnotationDeproxy deproxy;
2958
2959 try {
2960 if (target != null) {
2961 deproxy = new AnnotationDeproxy(proxyOn);
2962 theTarget = deproxy.deproxyCompound(target);
2963 }
2964
2965 if (repeatable != null) {
2966 deproxy = new AnnotationDeproxy(proxyOn);
2967 theRepeatable = deproxy.deproxyCompound(repeatable);
2968 }
2969 } catch (Exception e) {
2970 throw new CompletionFailure(sym, e.getMessage());
2971 }
2972
2973 sym.getAnnotationTypeMetadata().setTarget(theTarget);
2974 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
2975 }
2976 }
2977
2978 private class ProxyType extends Type {
2979
2980 private final byte[] content;
2981
2982 public ProxyType(byte[] content) {
2983 super(syms.noSymbol, TypeMetadata.EMPTY);
2984 this.content = content;
2985 }
2986
2987 @Override
2988 public TypeTag getTag() {
2989 return TypeTag.NONE;
2990 }
2991
2992 @Override
2993 public Type cloneWithMetadata(TypeMetadata metadata) {
2994 throw new UnsupportedOperationException();
2995 }
2996
2997 public Type resolve() {
2998 return sigToType(content, 0, content.length);
2999 }
3000
3001 @Override @DefinedBy(Api.LANGUAGE_MODEL)
3002 public String toString() {
3003 return "<ProxyType>";
3004 }
3005
3006 }
3007
3008 private static final class InterimUsesDirective {
3009 public final Name service;
3010
3011 public InterimUsesDirective(Name service) {
3012 this.service = service;
3013 }
3014
3015 }
3016
3017 private static final class InterimProvidesDirective {
3018 public final Name service;
3019 public final List<Name> impls;
3020
3021 public InterimProvidesDirective(Name service, List<Name> impls) {
3022 this.service = service;
3023 this.impls = impls;
3024 }
3025
3026 }
3027
3028 private final class UsesProvidesCompleter implements Completer {
3029 private final ModuleSymbol currentModule;
3030 private final List<InterimUsesDirective> interimUsesCopy;
3031 private final List<InterimProvidesDirective> interimProvidesCopy;
3032
3033 public UsesProvidesCompleter(ModuleSymbol currentModule, List<InterimUsesDirective> interimUsesCopy, List<InterimProvidesDirective> interimProvidesCopy) {
3034 this.currentModule = currentModule;
3035 this.interimUsesCopy = interimUsesCopy;
3036 this.interimProvidesCopy = interimProvidesCopy;
3037 }
3038
3039 @Override
3040 public void complete(Symbol sym) throws CompletionFailure {
3041 ListBuffer<Directive> directives = new ListBuffer<>();
3042 directives.addAll(currentModule.directives);
3043 ListBuffer<UsesDirective> uses = new ListBuffer<>();
3044 for (InterimUsesDirective interim : interimUsesCopy) {
3045 UsesDirective d = new UsesDirective(syms.enterClass(currentModule, interim.service));
3046 uses.add(d);
3047 directives.add(d);
3048 }
3049 currentModule.uses = uses.toList();
3050 ListBuffer<ProvidesDirective> provides = new ListBuffer<>();
3051 for (InterimProvidesDirective interim : interimProvidesCopy) {
3052 ListBuffer<ClassSymbol> impls = new ListBuffer<>();
3053 for (Name impl : interim.impls) {
3054 impls.append(syms.enterClass(currentModule, impl));
3055 }
3056 ProvidesDirective d = new ProvidesDirective(syms.enterClass(currentModule, interim.service),
3057 impls.toList());
3058 provides.add(d);
3059 directives.add(d);
3060 }
3061 currentModule.provides = provides.toList();
3062 currentModule.directives = directives.toList();
3063 }
3064 }
3065 }