1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.nio.file.Path;
33 import java.util.Arrays;
34 import java.util.EnumSet;
35 import java.util.HashMap;
36 import java.util.HashSet;
37 import java.util.Map;
38 import java.util.Set;
39 import javax.tools.JavaFileManager;
40 import javax.tools.JavaFileObject;
41 import com.sun.tools.javac.comp.Annotate;
42 import com.sun.tools.javac.comp.Annotate.AnnotationTypeCompleter;
43 import com.sun.tools.javac.code.*;
44 import com.sun.tools.javac.code.Lint.LintCategory;
45 import com.sun.tools.javac.code.Scope.WriteableScope;
46 import com.sun.tools.javac.code.Symbol.*;
47 import com.sun.tools.javac.code.Symtab;
48 import com.sun.tools.javac.code.Type.*;
49 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata;
50 import com.sun.tools.javac.file.BaseFileObject;
51 import com.sun.tools.javac.jvm.ClassFile.NameAndType;
52 import com.sun.tools.javac.jvm.ClassFile.Version;
53 import com.sun.tools.javac.util.*;
54 import com.sun.tools.javac.util.DefinedBy.Api;
55 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
56
57 import static com.sun.tools.javac.code.Flags.*;
58 import static com.sun.tools.javac.code.Kinds.Kind.*;
59 import static com.sun.tools.javac.code.TypeTag.ARRAY;
60 import static com.sun.tools.javac.code.TypeTag.CLASS;
61 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
62 import static com.sun.tools.javac.jvm.ClassFile.*;
63 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
64
65 import static com.sun.tools.javac.main.Option.*;
66
67 /** This class provides operations to read a classfile into an internal
68 * representation. The internal representation is anchored in a
69 * ClassSymbol which contains in its scope symbol representations
70 * for all other definitions in the classfile. Top-level Classes themselves
71 * appear as members of the scopes of PackageSymbols.
72 *
73 * <p><b>This is NOT part of any supported API.
74 * If you write code that depends on this, you do so at your own risk.
75 * This code and its internal interfaces are subject to change or
76 * deletion without notice.</b>
77 */
78 public class ClassReader {
79 /** The context key for the class reader. */
80 protected static final Context.Key<ClassReader> classReaderKey = new Context.Key<>();
81
82 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
83
84 private final Annotate annotate;
85
86 /** Switch: verbose output.
87 */
88 boolean verbose;
89
90 /** Switch: check class file for correct minor version, unrecognized
91 * attributes.
92 */
93 boolean checkClassFile;
94
95 /** Switch: read constant pool and code sections. This switch is initially
96 * set to false but can be turned on from outside.
97 */
98 public boolean readAllOfClassFile = false;
99
100 /** Switch: allow simplified varargs.
101 */
102 boolean allowSimplifiedVarargs;
103
104 /** Lint option: warn about classfile issues
105 */
106 boolean lintClassfile;
107
108 /** Switch: preserve parameter names from the variable table.
109 */
110 public boolean saveParameterNames;
111
112 /**
113 * The currently selected profile.
114 */
115 public final Profile profile;
116
117 /** The log to use for verbose output
118 */
119 final Log log;
120
121 /** The symbol table. */
122 Symtab syms;
123
124 Types types;
125
126 /** The name table. */
127 final Names names;
128
129 /** Access to files
130 */
131 private final JavaFileManager fileManager;
132
133 /** Factory for diagnostics
134 */
135 JCDiagnostic.Factory diagFactory;
136
137 /** The current scope where type variables are entered.
138 */
139 protected WriteableScope typevars;
140
141 /** The path name of the class file currently being read.
142 */
143 protected JavaFileObject currentClassFile = null;
144
145 /** The class or method currently being read.
146 */
147 protected Symbol currentOwner = null;
148
149 /** The buffer containing the currently read class file.
150 */
151 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
152
153 /** The current input pointer.
154 */
155 protected int bp;
156
157 /** The objects of the constant pool.
158 */
159 Object[] poolObj;
160
161 /** For every constant pool entry, an index into buf where the
162 * defining section of the entry is found.
163 */
164 int[] poolIdx;
165
166 /** The major version number of the class file being read. */
167 int majorVersion;
168 /** The minor version number of the class file being read. */
169 int minorVersion;
170
171 /** A table to hold the constant pool indices for method parameter
172 * names, as given in LocalVariableTable attributes.
173 */
174 int[] parameterNameIndices;
175
176 /**
177 * Whether or not any parameter names have been found.
178 */
179 boolean haveParameterNameIndices;
180
181 /** Set this to false every time we start reading a method
182 * and are saving parameter names. Set it to true when we see
183 * MethodParameters, if it's set when we see a LocalVariableTable,
184 * then we ignore the parameter names from the LVT.
185 */
186 boolean sawMethodParameters;
187
188 /**
189 * The set of attribute names for which warnings have been generated for the current class
190 */
191 Set<Name> warnedAttrs = new HashSet<>();
192
193 /**
194 * The prototype @Target Attribute.Compound if this class is an annotation annotated with
195 * @Target
196 */
197 CompoundAnnotationProxy target;
198
199 /**
200 * The prototype @Repetable Attribute.Compound if this class is an annotation annotated with
201 * @Repeatable
202 */
203 CompoundAnnotationProxy repeatable;
204
205 /** Get the ClassReader instance for this invocation. */
206 public static ClassReader instance(Context context) {
207 ClassReader instance = context.get(classReaderKey);
208 if (instance == null)
209 instance = new ClassReader(context);
210 return instance;
211 }
212
213 /** Construct a new class reader. */
214 protected ClassReader(Context context) {
215 context.put(classReaderKey, this);
216 annotate = Annotate.instance(context);
217 names = Names.instance(context);
218 syms = Symtab.instance(context);
219 types = Types.instance(context);
220 fileManager = context.get(JavaFileManager.class);
221 if (fileManager == null)
222 throw new AssertionError("FileManager initialization error");
223 diagFactory = JCDiagnostic.Factory.instance(context);
224
225 log = Log.instance(context);
226
227 Options options = Options.instance(context);
228 verbose = options.isSet(VERBOSE);
229 checkClassFile = options.isSet("-checkclassfile");
230
231 Source source = Source.instance(context);
232 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
233
234 saveParameterNames = options.isSet("save-parameter-names");
235
236 profile = Profile.instance(context);
237
238 typevars = WriteableScope.create(syms.noSymbol);
239
240 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
241
242 initAttributeReaders();
243 }
244
245 /** Add member to class unless it is synthetic.
246 */
247 private void enterMember(ClassSymbol c, Symbol sym) {
248 // Synthetic members are not entered -- reason lost to history (optimization?).
249 // Lambda methods must be entered because they may have inner classes (which reference them)
250 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
251 c.members_field.enter(sym);
252 }
253
254 /************************************************************************
255 * Error Diagnoses
256 ***********************************************************************/
257
258 public ClassFinder.BadClassFile badClassFile(String key, Object... args) {
259 return new ClassFinder.BadClassFile (
260 currentOwner.enclClass(),
261 currentClassFile,
262 diagFactory.fragment(key, args),
263 diagFactory);
264 }
265
266 /************************************************************************
267 * Buffer Access
268 ***********************************************************************/
269
270 /** Read a character.
271 */
272 char nextChar() {
273 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
274 }
275
276 /** Read a byte.
277 */
278 int nextByte() {
279 return buf[bp++] & 0xFF;
280 }
281
282 /** Read an integer.
283 */
284 int nextInt() {
285 return
286 ((buf[bp++] & 0xFF) << 24) +
287 ((buf[bp++] & 0xFF) << 16) +
288 ((buf[bp++] & 0xFF) << 8) +
289 (buf[bp++] & 0xFF);
290 }
291
292 /** Extract a character at position bp from buf.
293 */
294 char getChar(int bp) {
295 return
296 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
297 }
298
299 /** Extract an integer at position bp from buf.
300 */
301 int getInt(int bp) {
302 return
303 ((buf[bp] & 0xFF) << 24) +
304 ((buf[bp+1] & 0xFF) << 16) +
305 ((buf[bp+2] & 0xFF) << 8) +
306 (buf[bp+3] & 0xFF);
307 }
308
309
310 /** Extract a long integer at position bp from buf.
311 */
312 long getLong(int bp) {
313 DataInputStream bufin =
314 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
315 try {
316 return bufin.readLong();
317 } catch (IOException e) {
318 throw new AssertionError(e);
319 }
320 }
321
322 /** Extract a float at position bp from buf.
323 */
324 float getFloat(int bp) {
325 DataInputStream bufin =
326 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
327 try {
328 return bufin.readFloat();
329 } catch (IOException e) {
330 throw new AssertionError(e);
331 }
332 }
333
334 /** Extract a double at position bp from buf.
335 */
336 double getDouble(int bp) {
337 DataInputStream bufin =
338 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
339 try {
340 return bufin.readDouble();
341 } catch (IOException e) {
342 throw new AssertionError(e);
343 }
344 }
345
346 /************************************************************************
347 * Constant Pool Access
348 ***********************************************************************/
349
350 /** Index all constant pool entries, writing their start addresses into
351 * poolIdx.
352 */
353 void indexPool() {
354 poolIdx = new int[nextChar()];
355 poolObj = new Object[poolIdx.length];
356 int i = 1;
357 while (i < poolIdx.length) {
358 poolIdx[i++] = bp;
359 byte tag = buf[bp++];
360 switch (tag) {
361 case CONSTANT_Utf8: case CONSTANT_Unicode: {
362 int len = nextChar();
363 bp = bp + len;
364 break;
365 }
366 case CONSTANT_Class:
367 case CONSTANT_String:
368 case CONSTANT_MethodType:
369 bp = bp + 2;
370 break;
371 case CONSTANT_MethodHandle:
372 bp = bp + 3;
373 break;
374 case CONSTANT_Fieldref:
375 case CONSTANT_Methodref:
376 case CONSTANT_InterfaceMethodref:
377 case CONSTANT_NameandType:
378 case CONSTANT_Integer:
379 case CONSTANT_Float:
380 case CONSTANT_InvokeDynamic:
381 bp = bp + 4;
382 break;
383 case CONSTANT_Long:
384 case CONSTANT_Double:
385 bp = bp + 8;
386 i++;
387 break;
388 default:
389 throw badClassFile("bad.const.pool.tag.at",
390 Byte.toString(tag),
391 Integer.toString(bp -1));
392 }
393 }
394 }
395
396 /** Read constant pool entry at start address i, use pool as a cache.
397 */
398 Object readPool(int i) {
399 Object result = poolObj[i];
400 if (result != null) return result;
401
402 int index = poolIdx[i];
403 if (index == 0) return null;
404
405 byte tag = buf[index];
406 switch (tag) {
407 case CONSTANT_Utf8:
408 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
409 break;
410 case CONSTANT_Unicode:
411 throw badClassFile("unicode.str.not.supported");
412 case CONSTANT_Class:
413 poolObj[i] = readClassOrType(getChar(index + 1));
414 break;
415 case CONSTANT_String:
416 // FIXME: (footprint) do not use toString here
417 poolObj[i] = readName(getChar(index + 1)).toString();
418 break;
419 case CONSTANT_Fieldref: {
420 ClassSymbol owner = readClassSymbol(getChar(index + 1));
421 NameAndType nt = readNameAndType(getChar(index + 3));
422 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
423 break;
424 }
425 case CONSTANT_Methodref:
426 case CONSTANT_InterfaceMethodref: {
427 ClassSymbol owner = readClassSymbol(getChar(index + 1));
428 NameAndType nt = readNameAndType(getChar(index + 3));
429 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
430 break;
431 }
432 case CONSTANT_NameandType:
433 poolObj[i] = new NameAndType(
434 readName(getChar(index + 1)),
435 readType(getChar(index + 3)), types);
436 break;
437 case CONSTANT_Integer:
438 poolObj[i] = getInt(index + 1);
439 break;
440 case CONSTANT_Float:
441 poolObj[i] = new Float(getFloat(index + 1));
442 break;
443 case CONSTANT_Long:
444 poolObj[i] = new Long(getLong(index + 1));
445 break;
446 case CONSTANT_Double:
447 poolObj[i] = new Double(getDouble(index + 1));
448 break;
449 case CONSTANT_MethodHandle:
450 skipBytes(4);
451 break;
452 case CONSTANT_MethodType:
453 skipBytes(3);
454 break;
455 case CONSTANT_InvokeDynamic:
456 skipBytes(5);
457 break;
458 default:
459 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
460 }
461 return poolObj[i];
462 }
463
464 /** Read signature and convert to type.
465 */
466 Type readType(int i) {
467 int index = poolIdx[i];
468 return sigToType(buf, index + 3, getChar(index + 1));
469 }
470
471 /** If name is an array type or class signature, return the
472 * corresponding type; otherwise return a ClassSymbol with given name.
473 */
474 Object readClassOrType(int i) {
475 int index = poolIdx[i];
476 int len = getChar(index + 1);
477 int start = index + 3;
478 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
479 // by the above assertion, the following test can be
480 // simplified to (buf[start] == '[')
481 return (buf[start] == '[' || buf[start + len - 1] == ';')
482 ? (Object)sigToType(buf, start, len)
483 : (Object)syms.enterClass(names.fromUtf(internalize(buf, start,
484 len)));
485 }
486
487 /** Read signature and convert to type parameters.
488 */
489 List<Type> readTypeParams(int i) {
490 int index = poolIdx[i];
491 return sigToTypeParams(buf, index + 3, getChar(index + 1));
492 }
493
494 /** Read class entry.
495 */
496 ClassSymbol readClassSymbol(int i) {
497 Object obj = readPool(i);
498 if (obj != null && !(obj instanceof ClassSymbol))
499 throw badClassFile("bad.const.pool.entry",
500 currentClassFile.toString(),
501 "CONSTANT_Class_info", i);
502 return (ClassSymbol)obj;
503 }
504
505 /** Read name.
506 */
507 Name readName(int i) {
508 Object obj = readPool(i);
509 if (obj != null && !(obj instanceof Name))
510 throw badClassFile("bad.const.pool.entry",
511 currentClassFile.toString(),
512 "CONSTANT_Utf8_info or CONSTANT_String_info", i);
513 return (Name)obj;
514 }
515
516 /** Read name and type.
517 */
518 NameAndType readNameAndType(int i) {
519 Object obj = readPool(i);
520 if (obj != null && !(obj instanceof NameAndType))
521 throw badClassFile("bad.const.pool.entry",
522 currentClassFile.toString(),
523 "CONSTANT_NameAndType_info", i);
524 return (NameAndType)obj;
525 }
526
527 /************************************************************************
528 * Reading Types
529 ***********************************************************************/
530
531 /** The unread portion of the currently read type is
532 * signature[sigp..siglimit-1].
533 */
534 byte[] signature;
535 int sigp;
536 int siglimit;
537 boolean sigEnterPhase = false;
538
539 /** Convert signature to type, where signature is a byte array segment.
540 */
541 Type sigToType(byte[] sig, int offset, int len) {
542 signature = sig;
543 sigp = offset;
544 siglimit = offset + len;
545 return sigToType();
546 }
547
548 /** Convert signature to type, where signature is implicit.
549 */
550 Type sigToType() {
551 switch ((char) signature[sigp]) {
552 case 'T':
553 sigp++;
554 int start = sigp;
555 while (signature[sigp] != ';') sigp++;
556 sigp++;
557 return sigEnterPhase
558 ? Type.noType
559 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
560 case '+': {
561 sigp++;
562 Type t = sigToType();
563 return new WildcardType(t, BoundKind.EXTENDS, syms.boundClass);
564 }
565 case '*':
566 sigp++;
567 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
568 syms.boundClass);
569 case '-': {
570 sigp++;
571 Type t = sigToType();
572 return new WildcardType(t, BoundKind.SUPER, syms.boundClass);
573 }
574 case 'B':
575 sigp++;
576 return syms.byteType;
577 case 'C':
578 sigp++;
579 return syms.charType;
580 case 'D':
581 sigp++;
582 return syms.doubleType;
583 case 'F':
584 sigp++;
585 return syms.floatType;
586 case 'I':
587 sigp++;
588 return syms.intType;
589 case 'J':
590 sigp++;
591 return syms.longType;
592 case 'L':
593 {
594 // int oldsigp = sigp;
595 Type t = classSigToType();
596 if (sigp < siglimit && signature[sigp] == '.')
597 throw badClassFile("deprecated inner class signature syntax " +
598 "(please recompile from source)");
599 /*
600 System.err.println(" decoded " +
601 new String(signature, oldsigp, sigp-oldsigp) +
602 " => " + t + " outer " + t.outer());
603 */
604 return t;
605 }
606 case 'S':
607 sigp++;
608 return syms.shortType;
609 case 'V':
610 sigp++;
611 return syms.voidType;
612 case 'Z':
613 sigp++;
614 return syms.booleanType;
615 case '[':
616 sigp++;
617 return new ArrayType(sigToType(), syms.arrayClass);
618 case '(':
619 sigp++;
620 List<Type> argtypes = sigToTypes(')');
621 Type restype = sigToType();
622 List<Type> thrown = List.nil();
623 while (signature[sigp] == '^') {
624 sigp++;
625 thrown = thrown.prepend(sigToType());
626 }
627 // if there is a typevar in the throws clause we should state it.
628 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
629 if (l.head.hasTag(TYPEVAR)) {
630 l.head.tsym.flags_field |= THROWS;
631 }
632 }
633 return new MethodType(argtypes,
634 restype,
635 thrown.reverse(),
636 syms.methodClass);
637 case '<':
638 typevars = typevars.dup(currentOwner);
639 Type poly = new ForAll(sigToTypeParams(), sigToType());
640 typevars = typevars.leave();
641 return poly;
642 default:
643 throw badClassFile("bad.signature",
644 Convert.utf2string(signature, sigp, 10));
645 }
646 }
647
648 byte[] signatureBuffer = new byte[0];
649 int sbp = 0;
650 /** Convert class signature to type, where signature is implicit.
651 */
652 Type classSigToType() {
653 if (signature[sigp] != 'L')
654 throw badClassFile("bad.class.signature",
655 Convert.utf2string(signature, sigp, 10));
656 sigp++;
657 Type outer = Type.noType;
658 int startSbp = sbp;
659
660 while (true) {
661 final byte c = signature[sigp++];
662 switch (c) {
663
664 case ';': { // end
665 ClassSymbol t = syms.enterClass(names.fromUtf(signatureBuffer,
666 startSbp,
667 sbp - startSbp));
668
669 try {
670 return (outer == Type.noType) ?
671 t.erasure(types) :
672 new ClassType(outer, List.<Type>nil(), t);
673 } finally {
674 sbp = startSbp;
675 }
676 }
677
678 case '<': // generic arguments
679 ClassSymbol t = syms.enterClass(names.fromUtf(signatureBuffer,
680 startSbp,
681 sbp - startSbp));
682 outer = new ClassType(outer, sigToTypes('>'), t) {
683 boolean completed = false;
684 @Override @DefinedBy(Api.LANGUAGE_MODEL)
685 public Type getEnclosingType() {
686 if (!completed) {
687 completed = true;
688 tsym.complete();
689 Type enclosingType = tsym.type.getEnclosingType();
690 if (enclosingType != Type.noType) {
691 List<Type> typeArgs =
692 super.getEnclosingType().allparams();
693 List<Type> typeParams =
694 enclosingType.allparams();
695 if (typeParams.length() != typeArgs.length()) {
696 // no "rare" types
697 super.setEnclosingType(types.erasure(enclosingType));
698 } else {
699 super.setEnclosingType(types.subst(enclosingType,
700 typeParams,
701 typeArgs));
702 }
703 } else {
704 super.setEnclosingType(Type.noType);
705 }
706 }
707 return super.getEnclosingType();
708 }
709 @Override
710 public void setEnclosingType(Type outer) {
711 throw new UnsupportedOperationException();
712 }
713 };
714 switch (signature[sigp++]) {
715 case ';':
716 if (sigp < signature.length && signature[sigp] == '.') {
717 // support old-style GJC signatures
718 // The signature produced was
719 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
720 // rather than say
721 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
722 // so we skip past ".Lfoo/Outer$"
723 sigp += (sbp - startSbp) + // "foo/Outer"
724 3; // ".L" and "$"
725 signatureBuffer[sbp++] = (byte)'$';
726 break;
727 } else {
728 sbp = startSbp;
729 return outer;
730 }
731 case '.':
732 signatureBuffer[sbp++] = (byte)'$';
733 break;
734 default:
735 throw new AssertionError(signature[sigp-1]);
736 }
737 continue;
738
739 case '.':
740 //we have seen an enclosing non-generic class
741 if (outer != Type.noType) {
742 t = syms.enterClass(names.fromUtf(signatureBuffer,
743 startSbp,
744 sbp - startSbp));
745 outer = new ClassType(outer, List.<Type>nil(), t);
746 }
747 signatureBuffer[sbp++] = (byte)'$';
748 continue;
749 case '/':
750 signatureBuffer[sbp++] = (byte)'.';
751 continue;
752 default:
753 signatureBuffer[sbp++] = c;
754 continue;
755 }
756 }
757 }
758
759 /** Convert (implicit) signature to list of types
760 * until `terminator' is encountered.
761 */
762 List<Type> sigToTypes(char terminator) {
763 List<Type> head = List.of(null);
764 List<Type> tail = head;
765 while (signature[sigp] != terminator)
766 tail = tail.setTail(List.of(sigToType()));
767 sigp++;
768 return head.tail;
769 }
770
771 /** Convert signature to type parameters, where signature is a byte
772 * array segment.
773 */
774 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
775 signature = sig;
776 sigp = offset;
777 siglimit = offset + len;
778 return sigToTypeParams();
779 }
780
781 /** Convert signature to type parameters, where signature is implicit.
782 */
783 List<Type> sigToTypeParams() {
784 List<Type> tvars = List.nil();
785 if (signature[sigp] == '<') {
786 sigp++;
787 int start = sigp;
788 sigEnterPhase = true;
789 while (signature[sigp] != '>')
790 tvars = tvars.prepend(sigToTypeParam());
791 sigEnterPhase = false;
792 sigp = start;
793 while (signature[sigp] != '>')
794 sigToTypeParam();
795 sigp++;
796 }
797 return tvars.reverse();
798 }
799
800 /** Convert (implicit) signature to type parameter.
801 */
802 Type sigToTypeParam() {
803 int start = sigp;
804 while (signature[sigp] != ':') sigp++;
805 Name name = names.fromUtf(signature, start, sigp - start);
806 TypeVar tvar;
807 if (sigEnterPhase) {
808 tvar = new TypeVar(name, currentOwner, syms.botType);
809 typevars.enter(tvar.tsym);
810 } else {
811 tvar = (TypeVar)findTypeVar(name);
812 }
813 List<Type> bounds = List.nil();
814 boolean allInterfaces = false;
815 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
816 sigp++;
817 allInterfaces = true;
818 }
819 while (signature[sigp] == ':') {
820 sigp++;
821 bounds = bounds.prepend(sigToType());
822 }
823 if (!sigEnterPhase) {
824 types.setBounds(tvar, bounds.reverse(), allInterfaces);
825 }
826 return tvar;
827 }
828
829 /** Find type variable with given name in `typevars' scope.
830 */
831 Type findTypeVar(Name name) {
832 Symbol s = typevars.findFirst(name);
833 if (s != null) {
834 return s.type;
835 } else {
836 if (readingClassAttr) {
837 // While reading the class attribute, the supertypes
838 // might refer to a type variable from an enclosing element
839 // (method or class).
840 // If the type variable is defined in the enclosing class,
841 // we can actually find it in
842 // currentOwner.owner.type.getTypeArguments()
843 // However, until we have read the enclosing method attribute
844 // we don't know for sure if this owner is correct. It could
845 // be a method and there is no way to tell before reading the
846 // enclosing method attribute.
847 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
848 missingTypeVariables = missingTypeVariables.prepend(t);
849 // System.err.println("Missing type var " + name);
850 return t;
851 }
852 throw badClassFile("undecl.type.var", name);
853 }
854 }
855
856 /************************************************************************
857 * Reading Attributes
858 ***********************************************************************/
859
860 protected enum AttributeKind { CLASS, MEMBER }
861
862 protected abstract class AttributeReader {
863 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
864 this.name = name;
865 this.version = version;
866 this.kinds = kinds;
867 }
868
869 protected boolean accepts(AttributeKind kind) {
870 if (kinds.contains(kind)) {
871 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
872 return true;
873
874 if (lintClassfile && !warnedAttrs.contains(name)) {
875 JavaFileObject prev = log.useSource(currentClassFile);
876 try {
877 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
878 name, version.major, version.minor, majorVersion, minorVersion);
879 } finally {
880 log.useSource(prev);
881 }
882 warnedAttrs.add(name);
883 }
884 }
885 return false;
886 }
887
888 protected abstract void read(Symbol sym, int attrLen);
889
890 protected final Name name;
891 protected final ClassFile.Version version;
892 protected final Set<AttributeKind> kinds;
893 }
894
895 protected Set<AttributeKind> CLASS_ATTRIBUTE =
896 EnumSet.of(AttributeKind.CLASS);
897 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
898 EnumSet.of(AttributeKind.MEMBER);
899 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
900 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
901
902 protected Map<Name, AttributeReader> attributeReaders = new HashMap<>();
903
904 private void initAttributeReaders() {
905 AttributeReader[] readers = {
906 // v45.3 attributes
907
908 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
909 protected void read(Symbol sym, int attrLen) {
910 if (readAllOfClassFile || saveParameterNames)
911 ((MethodSymbol)sym).code = readCode(sym);
912 else
913 bp = bp + attrLen;
914 }
915 },
916
917 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
918 protected void read(Symbol sym, int attrLen) {
919 Object v = readPool(nextChar());
920 // Ignore ConstantValue attribute if field not final.
921 if ((sym.flags() & FINAL) != 0)
922 ((VarSymbol) sym).setData(v);
923 }
924 },
925
926 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
927 protected void read(Symbol sym, int attrLen) {
928 sym.flags_field |= DEPRECATED;
929 }
930 },
931
932 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
933 protected void read(Symbol sym, int attrLen) {
934 int nexceptions = nextChar();
935 List<Type> thrown = List.nil();
936 for (int j = 0; j < nexceptions; j++)
937 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
938 if (sym.type.getThrownTypes().isEmpty())
939 sym.type.asMethodType().thrown = thrown.reverse();
940 }
941 },
942
943 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
944 protected void read(Symbol sym, int attrLen) {
945 ClassSymbol c = (ClassSymbol) sym;
946 readInnerClasses(c);
947 }
948 },
949
950 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
951 protected void read(Symbol sym, int attrLen) {
952 int newbp = bp + attrLen;
953 if (saveParameterNames && !sawMethodParameters) {
954 // Pick up parameter names from the variable table.
955 // Parameter names are not explicitly identified as such,
956 // but all parameter name entries in the LocalVariableTable
957 // have a start_pc of 0. Therefore, we record the name
958 // indicies of all slots with a start_pc of zero in the
959 // parameterNameIndicies array.
960 // Note that this implicitly honors the JVMS spec that
961 // there may be more than one LocalVariableTable, and that
962 // there is no specified ordering for the entries.
963 int numEntries = nextChar();
964 for (int i = 0; i < numEntries; i++) {
965 int start_pc = nextChar();
966 int length = nextChar();
967 int nameIndex = nextChar();
968 int sigIndex = nextChar();
969 int register = nextChar();
970 if (start_pc == 0) {
971 // ensure array large enough
972 if (register >= parameterNameIndices.length) {
973 int newSize = Math.max(register, parameterNameIndices.length + 8);
974 parameterNameIndices =
975 Arrays.copyOf(parameterNameIndices, newSize);
976 }
977 parameterNameIndices[register] = nameIndex;
978 haveParameterNameIndices = true;
979 }
980 }
981 }
982 bp = newbp;
983 }
984 },
985
986 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
987 protected void read(Symbol sym, int attrlen) {
988 int newbp = bp + attrlen;
989 if (saveParameterNames) {
990 sawMethodParameters = true;
991 int numEntries = nextByte();
992 parameterNameIndices = new int[numEntries];
993 haveParameterNameIndices = true;
994 for (int i = 0; i < numEntries; i++) {
995 int nameIndex = nextChar();
996 int flags = nextChar();
997 parameterNameIndices[i] = nameIndex;
998 }
999 }
1000 bp = newbp;
1001 }
1002 },
1003
1004
1005 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1006 protected void read(Symbol sym, int attrLen) {
1007 ClassSymbol c = (ClassSymbol) sym;
1008 Name n = readName(nextChar());
1009 c.sourcefile = new SourceFileObject(n, c.flatname);
1010 // If the class is a toplevel class, originating from a Java source file,
1011 // but the class name does not match the file name, then it is
1012 // an auxiliary class.
1013 String sn = n.toString();
1014 if (c.owner.kind == PCK &&
1015 sn.endsWith(".java") &&
1016 !sn.equals(c.name.toString()+".java")) {
1017 c.flags_field |= AUXILIARY;
1018 }
1019 }
1020 },
1021
1022 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1023 protected void read(Symbol sym, int attrLen) {
1024 sym.flags_field |= SYNTHETIC;
1025 }
1026 },
1027
1028 // standard v49 attributes
1029
1030 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1031 protected void read(Symbol sym, int attrLen) {
1032 int newbp = bp + attrLen;
1033 readEnclosingMethodAttr(sym);
1034 bp = newbp;
1035 }
1036 },
1037
1038 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1039 protected void read(Symbol sym, int attrLen) {
1040 if (sym.kind == TYP) {
1041 ClassSymbol c = (ClassSymbol) sym;
1042 readingClassAttr = true;
1043 try {
1044 ClassType ct1 = (ClassType)c.type;
1045 Assert.check(c == currentOwner);
1046 ct1.typarams_field = readTypeParams(nextChar());
1047 ct1.supertype_field = sigToType();
1048 ListBuffer<Type> is = new ListBuffer<>();
1049 while (sigp != siglimit) is.append(sigToType());
1050 ct1.interfaces_field = is.toList();
1051 } finally {
1052 readingClassAttr = false;
1053 }
1054 } else {
1055 List<Type> thrown = sym.type.getThrownTypes();
1056 sym.type = readType(nextChar());
1057 //- System.err.println(" # " + sym.type);
1058 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1059 sym.type.asMethodType().thrown = thrown;
1060
1061 }
1062 }
1063 },
1064
1065 // v49 annotation attributes
1066
1067 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1068 protected void read(Symbol sym, int attrLen) {
1069 attachAnnotationDefault(sym);
1070 }
1071 },
1072
1073 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1074 protected void read(Symbol sym, int attrLen) {
1075 attachAnnotations(sym);
1076 }
1077 },
1078
1079 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1080 protected void read(Symbol sym, int attrLen) {
1081 attachParameterAnnotations(sym);
1082 }
1083 },
1084
1085 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1086 protected void read(Symbol sym, int attrLen) {
1087 attachAnnotations(sym);
1088 }
1089 },
1090
1091 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1092 protected void read(Symbol sym, int attrLen) {
1093 attachParameterAnnotations(sym);
1094 }
1095 },
1096
1097 // additional "legacy" v49 attributes, superceded by flags
1098
1099 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1100 protected void read(Symbol sym, int attrLen) {
1101 sym.flags_field |= ANNOTATION;
1102 }
1103 },
1104
1105 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1106 protected void read(Symbol sym, int attrLen) {
1107 sym.flags_field |= BRIDGE;
1108 }
1109 },
1110
1111 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1112 protected void read(Symbol sym, int attrLen) {
1113 sym.flags_field |= ENUM;
1114 }
1115 },
1116
1117 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1118 protected void read(Symbol sym, int attrLen) {
1119 sym.flags_field |= VARARGS;
1120 }
1121 },
1122
1123 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1124 protected void read(Symbol sym, int attrLen) {
1125 attachTypeAnnotations(sym);
1126 }
1127 },
1128
1129 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1130 protected void read(Symbol sym, int attrLen) {
1131 attachTypeAnnotations(sym);
1132 }
1133 },
1134
1135
1136 // The following attributes for a Code attribute are not currently handled
1137 // StackMapTable
1138 // SourceDebugExtension
1139 // LineNumberTable
1140 // LocalVariableTypeTable
1141 };
1142
1143 for (AttributeReader r: readers)
1144 attributeReaders.put(r.name, r);
1145 }
1146
1147 /** Report unrecognized attribute.
1148 */
1149 void unrecognized(Name attrName) {
1150 if (checkClassFile)
1151 printCCF("ccf.unrecognized.attribute", attrName);
1152 }
1153
1154
1155
1156 protected void readEnclosingMethodAttr(Symbol sym) {
1157 // sym is a nested class with an "Enclosing Method" attribute
1158 // remove sym from it's current owners scope and place it in
1159 // the scope specified by the attribute
1160 sym.owner.members().remove(sym);
1161 ClassSymbol self = (ClassSymbol)sym;
1162 ClassSymbol c = readClassSymbol(nextChar());
1163 NameAndType nt = readNameAndType(nextChar());
1164
1165 if (c.members_field == null)
1166 throw badClassFile("bad.enclosing.class", self, c);
1167
1168 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1169 if (nt != null && m == null)
1170 throw badClassFile("bad.enclosing.method", self);
1171
1172 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1173 self.owner = m != null ? m : c;
1174 if (self.name.isEmpty())
1175 self.fullname = names.empty;
1176 else
1177 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1178
1179 if (m != null) {
1180 ((ClassType)sym.type).setEnclosingType(m.type);
1181 } else if ((self.flags_field & STATIC) == 0) {
1182 ((ClassType)sym.type).setEnclosingType(c.type);
1183 } else {
1184 ((ClassType)sym.type).setEnclosingType(Type.noType);
1185 }
1186 enterTypevars(self);
1187 if (!missingTypeVariables.isEmpty()) {
1188 ListBuffer<Type> typeVars = new ListBuffer<>();
1189 for (Type typevar : missingTypeVariables) {
1190 typeVars.append(findTypeVar(typevar.tsym.name));
1191 }
1192 foundTypeVariables = typeVars.toList();
1193 } else {
1194 foundTypeVariables = List.nil();
1195 }
1196 }
1197
1198 // See java.lang.Class
1199 private Name simpleBinaryName(Name self, Name enclosing) {
1200 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1201 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1202 throw badClassFile("bad.enclosing.method", self);
1203 int index = 1;
1204 while (index < simpleBinaryName.length() &&
1205 isAsciiDigit(simpleBinaryName.charAt(index)))
1206 index++;
1207 return names.fromString(simpleBinaryName.substring(index));
1208 }
1209
1210 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1211 if (nt == null)
1212 return null;
1213
1214 MethodType type = nt.uniqueType.type.asMethodType();
1215
1216 for (Symbol sym : scope.getSymbolsByName(nt.name)) {
1217 if (sym.kind == MTH && isSameBinaryType(sym.type.asMethodType(), type))
1218 return (MethodSymbol)sym;
1219 }
1220
1221 if (nt.name != names.init)
1222 // not a constructor
1223 return null;
1224 if ((flags & INTERFACE) != 0)
1225 // no enclosing instance
1226 return null;
1227 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1228 // no parameters
1229 return null;
1230
1231 // A constructor of an inner class.
1232 // Remove the first argument (the enclosing instance)
1233 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1234 nt.uniqueType.type.getReturnType(),
1235 nt.uniqueType.type.getThrownTypes(),
1236 syms.methodClass));
1237 // Try searching again
1238 return findMethod(nt, scope, flags);
1239 }
1240
1241 /** Similar to Types.isSameType but avoids completion */
1242 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1243 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1244 .prepend(types.erasure(mt1.getReturnType()));
1245 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1246 while (!types1.isEmpty() && !types2.isEmpty()) {
1247 if (types1.head.tsym != types2.head.tsym)
1248 return false;
1249 types1 = types1.tail;
1250 types2 = types2.tail;
1251 }
1252 return types1.isEmpty() && types2.isEmpty();
1253 }
1254
1255 /**
1256 * Character.isDigit answers <tt>true</tt> to some non-ascii
1257 * digits. This one does not. <b>copied from java.lang.Class</b>
1258 */
1259 private static boolean isAsciiDigit(char c) {
1260 return '0' <= c && c <= '9';
1261 }
1262
1263 /** Read member attributes.
1264 */
1265 void readMemberAttrs(Symbol sym) {
1266 readAttrs(sym, AttributeKind.MEMBER);
1267 }
1268
1269 void readAttrs(Symbol sym, AttributeKind kind) {
1270 char ac = nextChar();
1271 for (int i = 0; i < ac; i++) {
1272 Name attrName = readName(nextChar());
1273 int attrLen = nextInt();
1274 AttributeReader r = attributeReaders.get(attrName);
1275 if (r != null && r.accepts(kind))
1276 r.read(sym, attrLen);
1277 else {
1278 unrecognized(attrName);
1279 bp = bp + attrLen;
1280 }
1281 }
1282 }
1283
1284 private boolean readingClassAttr = false;
1285 private List<Type> missingTypeVariables = List.nil();
1286 private List<Type> foundTypeVariables = List.nil();
1287
1288 /** Read class attributes.
1289 */
1290 void readClassAttrs(ClassSymbol c) {
1291 readAttrs(c, AttributeKind.CLASS);
1292 }
1293
1294 /** Read code block.
1295 */
1296 Code readCode(Symbol owner) {
1297 nextChar(); // max_stack
1298 nextChar(); // max_locals
1299 final int code_length = nextInt();
1300 bp += code_length;
1301 final char exception_table_length = nextChar();
1302 bp += exception_table_length * 8;
1303 readMemberAttrs(owner);
1304 return null;
1305 }
1306
1307 /************************************************************************
1308 * Reading Java-language annotations
1309 ***********************************************************************/
1310
1311 /** Attach annotations.
1312 */
1313 void attachAnnotations(final Symbol sym) {
1314 int numAttributes = nextChar();
1315 if (numAttributes != 0) {
1316 ListBuffer<CompoundAnnotationProxy> proxies = new ListBuffer<>();
1317 for (int i = 0; i<numAttributes; i++) {
1318 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1319
1320 if (proxy.type.tsym == syms.proprietaryType.tsym)
1321 sym.flags_field |= PROPRIETARY;
1322 else if (proxy.type.tsym == syms.profileType.tsym) {
1323 if (profile != Profile.DEFAULT) {
1324 for (Pair<Name,Attribute> v: proxy.values) {
1325 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1326 Attribute.Constant c = (Attribute.Constant) v.snd;
1327 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1328 sym.flags_field |= NOT_IN_PROFILE;
1329 }
1330 }
1331 }
1332 }
1333 } else {
1334 if (proxy.type.tsym == syms.annotationTargetType.tsym) {
1335 target = proxy;
1336 } else if (proxy.type.tsym == syms.repeatableType.tsym) {
1337 repeatable = proxy;
1338 }
1339
1340 proxies.append(proxy);
1341 }
1342 }
1343 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1344 }
1345 }
1346
1347 /** Attach parameter annotations.
1348 */
1349 void attachParameterAnnotations(final Symbol method) {
1350 final MethodSymbol meth = (MethodSymbol)method;
1351 int numParameters = buf[bp++] & 0xFF;
1352 List<VarSymbol> parameters = meth.params();
1353 int pnum = 0;
1354 while (parameters.tail != null) {
1355 attachAnnotations(parameters.head);
1356 parameters = parameters.tail;
1357 pnum++;
1358 }
1359 if (pnum != numParameters) {
1360 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1361 }
1362 }
1363
1364 void attachTypeAnnotations(final Symbol sym) {
1365 int numAttributes = nextChar();
1366 if (numAttributes != 0) {
1367 ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
1368 for (int i = 0; i < numAttributes; i++)
1369 proxies.append(readTypeAnnotation());
1370 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1371 }
1372 }
1373
1374 /** Attach the default value for an annotation element.
1375 */
1376 void attachAnnotationDefault(final Symbol sym) {
1377 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1378 final Attribute value = readAttributeValue();
1379
1380 // The default value is set later during annotation. It might
1381 // be the case that the Symbol sym is annotated _after_ the
1382 // repeating instances that depend on this default value,
1383 // because of this we set an interim value that tells us this
1384 // element (most likely) has a default.
1385 //
1386 // Set interim value for now, reset just before we do this
1387 // properly at annotate time.
1388 meth.defaultValue = value;
1389 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1390 }
1391
1392 Type readTypeOrClassSymbol(int i) {
1393 // support preliminary jsr175-format class files
1394 if (buf[poolIdx[i]] == CONSTANT_Class)
1395 return readClassSymbol(i).type;
1396 return readType(i);
1397 }
1398 Type readEnumType(int i) {
1399 // support preliminary jsr175-format class files
1400 int index = poolIdx[i];
1401 int length = getChar(index + 1);
1402 if (buf[index + length + 2] != ';')
1403 return syms.enterClass(readName(i)).type;
1404 return readType(i);
1405 }
1406
1407 CompoundAnnotationProxy readCompoundAnnotation() {
1408 Type t = readTypeOrClassSymbol(nextChar());
1409 int numFields = nextChar();
1410 ListBuffer<Pair<Name,Attribute>> pairs = new ListBuffer<>();
1411 for (int i=0; i<numFields; i++) {
1412 Name name = readName(nextChar());
1413 Attribute value = readAttributeValue();
1414 pairs.append(new Pair<>(name, value));
1415 }
1416 return new CompoundAnnotationProxy(t, pairs.toList());
1417 }
1418
1419 TypeAnnotationProxy readTypeAnnotation() {
1420 TypeAnnotationPosition position = readPosition();
1421 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1422
1423 return new TypeAnnotationProxy(proxy, position);
1424 }
1425
1426 TypeAnnotationPosition readPosition() {
1427 int tag = nextByte(); // TargetType tag is a byte
1428
1429 if (!TargetType.isValidTargetTypeValue(tag))
1430 throw badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1431
1432 TargetType type = TargetType.fromTargetTypeValue(tag);
1433
1434 switch (type) {
1435 // instanceof
1436 case INSTANCEOF: {
1437 final int offset = nextChar();
1438 final TypeAnnotationPosition position =
1439 TypeAnnotationPosition.instanceOf(readTypePath());
1440 position.offset = offset;
1441 return position;
1442 }
1443 // new expression
1444 case NEW: {
1445 final int offset = nextChar();
1446 final TypeAnnotationPosition position =
1447 TypeAnnotationPosition.newObj(readTypePath());
1448 position.offset = offset;
1449 return position;
1450 }
1451 // constructor/method reference receiver
1452 case CONSTRUCTOR_REFERENCE: {
1453 final int offset = nextChar();
1454 final TypeAnnotationPosition position =
1455 TypeAnnotationPosition.constructorRef(readTypePath());
1456 position.offset = offset;
1457 return position;
1458 }
1459 case METHOD_REFERENCE: {
1460 final int offset = nextChar();
1461 final TypeAnnotationPosition position =
1462 TypeAnnotationPosition.methodRef(readTypePath());
1463 position.offset = offset;
1464 return position;
1465 }
1466 // local variable
1467 case LOCAL_VARIABLE: {
1468 final int table_length = nextChar();
1469 final int[] newLvarOffset = new int[table_length];
1470 final int[] newLvarLength = new int[table_length];
1471 final int[] newLvarIndex = new int[table_length];
1472
1473 for (int i = 0; i < table_length; ++i) {
1474 newLvarOffset[i] = nextChar();
1475 newLvarLength[i] = nextChar();
1476 newLvarIndex[i] = nextChar();
1477 }
1478
1479 final TypeAnnotationPosition position =
1480 TypeAnnotationPosition.localVariable(readTypePath());
1481 position.lvarOffset = newLvarOffset;
1482 position.lvarLength = newLvarLength;
1483 position.lvarIndex = newLvarIndex;
1484 return position;
1485 }
1486 // resource variable
1487 case RESOURCE_VARIABLE: {
1488 final int table_length = nextChar();
1489 final int[] newLvarOffset = new int[table_length];
1490 final int[] newLvarLength = new int[table_length];
1491 final int[] newLvarIndex = new int[table_length];
1492
1493 for (int i = 0; i < table_length; ++i) {
1494 newLvarOffset[i] = nextChar();
1495 newLvarLength[i] = nextChar();
1496 newLvarIndex[i] = nextChar();
1497 }
1498
1499 final TypeAnnotationPosition position =
1500 TypeAnnotationPosition.resourceVariable(readTypePath());
1501 position.lvarOffset = newLvarOffset;
1502 position.lvarLength = newLvarLength;
1503 position.lvarIndex = newLvarIndex;
1504 return position;
1505 }
1506 // exception parameter
1507 case EXCEPTION_PARAMETER: {
1508 final int exception_index = nextChar();
1509 final TypeAnnotationPosition position =
1510 TypeAnnotationPosition.exceptionParameter(readTypePath());
1511 position.setExceptionIndex(exception_index);
1512 return position;
1513 }
1514 // method receiver
1515 case METHOD_RECEIVER:
1516 return TypeAnnotationPosition.methodReceiver(readTypePath());
1517 // type parameter
1518 case CLASS_TYPE_PARAMETER: {
1519 final int parameter_index = nextByte();
1520 return TypeAnnotationPosition
1521 .typeParameter(readTypePath(), parameter_index);
1522 }
1523 case METHOD_TYPE_PARAMETER: {
1524 final int parameter_index = nextByte();
1525 return TypeAnnotationPosition
1526 .methodTypeParameter(readTypePath(), parameter_index);
1527 }
1528 // type parameter bound
1529 case CLASS_TYPE_PARAMETER_BOUND: {
1530 final int parameter_index = nextByte();
1531 final int bound_index = nextByte();
1532 return TypeAnnotationPosition
1533 .typeParameterBound(readTypePath(), parameter_index,
1534 bound_index);
1535 }
1536 case METHOD_TYPE_PARAMETER_BOUND: {
1537 final int parameter_index = nextByte();
1538 final int bound_index = nextByte();
1539 return TypeAnnotationPosition
1540 .methodTypeParameterBound(readTypePath(), parameter_index,
1541 bound_index);
1542 }
1543 // class extends or implements clause
1544 case CLASS_EXTENDS: {
1545 final int type_index = nextChar();
1546 return TypeAnnotationPosition.classExtends(readTypePath(),
1547 type_index);
1548 }
1549 // throws
1550 case THROWS: {
1551 final int type_index = nextChar();
1552 return TypeAnnotationPosition.methodThrows(readTypePath(),
1553 type_index);
1554 }
1555 // method parameter
1556 case METHOD_FORMAL_PARAMETER: {
1557 final int parameter_index = nextByte();
1558 return TypeAnnotationPosition.methodParameter(readTypePath(),
1559 parameter_index);
1560 }
1561 // type cast
1562 case CAST: {
1563 final int offset = nextChar();
1564 final int type_index = nextByte();
1565 final TypeAnnotationPosition position =
1566 TypeAnnotationPosition.typeCast(readTypePath(), type_index);
1567 position.offset = offset;
1568 return position;
1569 }
1570 // method/constructor/reference type argument
1571 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT: {
1572 final int offset = nextChar();
1573 final int type_index = nextByte();
1574 final TypeAnnotationPosition position = TypeAnnotationPosition
1575 .constructorInvocationTypeArg(readTypePath(), type_index);
1576 position.offset = offset;
1577 return position;
1578 }
1579 case METHOD_INVOCATION_TYPE_ARGUMENT: {
1580 final int offset = nextChar();
1581 final int type_index = nextByte();
1582 final TypeAnnotationPosition position = TypeAnnotationPosition
1583 .methodInvocationTypeArg(readTypePath(), type_index);
1584 position.offset = offset;
1585 return position;
1586 }
1587 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT: {
1588 final int offset = nextChar();
1589 final int type_index = nextByte();
1590 final TypeAnnotationPosition position = TypeAnnotationPosition
1591 .constructorRefTypeArg(readTypePath(), type_index);
1592 position.offset = offset;
1593 return position;
1594 }
1595 case METHOD_REFERENCE_TYPE_ARGUMENT: {
1596 final int offset = nextChar();
1597 final int type_index = nextByte();
1598 final TypeAnnotationPosition position = TypeAnnotationPosition
1599 .methodRefTypeArg(readTypePath(), type_index);
1600 position.offset = offset;
1601 return position;
1602 }
1603 // We don't need to worry about these
1604 case METHOD_RETURN:
1605 return TypeAnnotationPosition.methodReturn(readTypePath());
1606 case FIELD:
1607 return TypeAnnotationPosition.field(readTypePath());
1608 case UNKNOWN:
1609 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1610 default:
1611 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + type);
1612 }
1613 }
1614
1615 List<TypeAnnotationPosition.TypePathEntry> readTypePath() {
1616 int len = nextByte();
1617 ListBuffer<Integer> loc = new ListBuffer<>();
1618 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1619 loc = loc.append(nextByte());
1620
1621 return TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1622
1623 }
1624
1625 Attribute readAttributeValue() {
1626 char c = (char) buf[bp++];
1627 switch (c) {
1628 case 'B':
1629 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1630 case 'C':
1631 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1632 case 'D':
1633 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1634 case 'F':
1635 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1636 case 'I':
1637 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1638 case 'J':
1639 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1640 case 'S':
1641 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1642 case 'Z':
1643 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1644 case 's':
1645 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1646 case 'e':
1647 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1648 case 'c':
1649 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1650 case '[': {
1651 int n = nextChar();
1652 ListBuffer<Attribute> l = new ListBuffer<>();
1653 for (int i=0; i<n; i++)
1654 l.append(readAttributeValue());
1655 return new ArrayAttributeProxy(l.toList());
1656 }
1657 case '@':
1658 return readCompoundAnnotation();
1659 default:
1660 throw new AssertionError("unknown annotation tag '" + c + "'");
1661 }
1662 }
1663
1664 interface ProxyVisitor extends Attribute.Visitor {
1665 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1666 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1667 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1668 }
1669
1670 static class EnumAttributeProxy extends Attribute {
1671 Type enumType;
1672 Name enumerator;
1673 public EnumAttributeProxy(Type enumType, Name enumerator) {
1674 super(null);
1675 this.enumType = enumType;
1676 this.enumerator = enumerator;
1677 }
1678 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1679 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1680 public String toString() {
1681 return "/*proxy enum*/" + enumType + "." + enumerator;
1682 }
1683 }
1684
1685 static class ArrayAttributeProxy extends Attribute {
1686 List<Attribute> values;
1687 ArrayAttributeProxy(List<Attribute> values) {
1688 super(null);
1689 this.values = values;
1690 }
1691 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1692 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1693 public String toString() {
1694 return "{" + values + "}";
1695 }
1696 }
1697
1698 /** A temporary proxy representing a compound attribute.
1699 */
1700 static class CompoundAnnotationProxy extends Attribute {
1701 final List<Pair<Name,Attribute>> values;
1702 public CompoundAnnotationProxy(Type type,
1703 List<Pair<Name,Attribute>> values) {
1704 super(type);
1705 this.values = values;
1706 }
1707 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1708 @Override @DefinedBy(Api.LANGUAGE_MODEL)
1709 public String toString() {
1710 StringBuilder buf = new StringBuilder();
1711 buf.append("@");
1712 buf.append(type.tsym.getQualifiedName());
1713 buf.append("/*proxy*/{");
1714 boolean first = true;
1715 for (List<Pair<Name,Attribute>> v = values;
1716 v.nonEmpty(); v = v.tail) {
1717 Pair<Name,Attribute> value = v.head;
1718 if (!first) buf.append(",");
1719 first = false;
1720 buf.append(value.fst);
1721 buf.append("=");
1722 buf.append(value.snd);
1723 }
1724 buf.append("}");
1725 return buf.toString();
1726 }
1727 }
1728
1729 /** A temporary proxy representing a type annotation.
1730 */
1731 static class TypeAnnotationProxy {
1732 final CompoundAnnotationProxy compound;
1733 final TypeAnnotationPosition position;
1734 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1735 TypeAnnotationPosition position) {
1736 this.compound = compound;
1737 this.position = position;
1738 }
1739 }
1740
1741 class AnnotationDeproxy implements ProxyVisitor {
1742 private ClassSymbol requestingOwner;
1743
1744 AnnotationDeproxy(ClassSymbol owner) {
1745 this.requestingOwner = owner;
1746 }
1747
1748 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1749 // also must fill in types!!!!
1750 ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
1751 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1752 buf.append(deproxyCompound(l.head));
1753 }
1754 return buf.toList();
1755 }
1756
1757 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1758 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf = new ListBuffer<>();
1759 for (List<Pair<Name,Attribute>> l = a.values;
1760 l.nonEmpty();
1761 l = l.tail) {
1762 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1763 buf.append(new Pair<>(meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1764 }
1765 return new Attribute.Compound(a.type, buf.toList());
1766 }
1767
1768 MethodSymbol findAccessMethod(Type container, Name name) {
1769 CompletionFailure failure = null;
1770 try {
1771 for (Symbol sym : container.tsym.members().getSymbolsByName(name)) {
1772 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1773 return (MethodSymbol) sym;
1774 }
1775 } catch (CompletionFailure ex) {
1776 failure = ex;
1777 }
1778 // The method wasn't found: emit a warning and recover
1779 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1780 try {
1781 if (lintClassfile) {
1782 if (failure == null) {
1783 log.warning("annotation.method.not.found",
1784 container,
1785 name);
1786 } else {
1787 log.warning("annotation.method.not.found.reason",
1788 container,
1789 name,
1790 failure.getDetailValue());//diagnostic, if present
1791 }
1792 }
1793 } finally {
1794 log.useSource(prevSource);
1795 }
1796 // Construct a new method type and symbol. Use bottom
1797 // type (typeof null) as return type because this type is
1798 // a subtype of all reference types and can be converted
1799 // to primitive types by unboxing.
1800 MethodType mt = new MethodType(List.<Type>nil(),
1801 syms.botType,
1802 List.<Type>nil(),
1803 syms.methodClass);
1804 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1805 }
1806
1807 Attribute result;
1808 Type type;
1809 Attribute deproxy(Type t, Attribute a) {
1810 Type oldType = type;
1811 try {
1812 type = t;
1813 a.accept(this);
1814 return result;
1815 } finally {
1816 type = oldType;
1817 }
1818 }
1819
1820 // implement Attribute.Visitor below
1821
1822 public void visitConstant(Attribute.Constant value) {
1823 // assert value.type == type;
1824 result = value;
1825 }
1826
1827 public void visitClass(Attribute.Class clazz) {
1828 result = clazz;
1829 }
1830
1831 public void visitEnum(Attribute.Enum e) {
1832 throw new AssertionError(); // shouldn't happen
1833 }
1834
1835 public void visitCompound(Attribute.Compound compound) {
1836 throw new AssertionError(); // shouldn't happen
1837 }
1838
1839 public void visitArray(Attribute.Array array) {
1840 throw new AssertionError(); // shouldn't happen
1841 }
1842
1843 public void visitError(Attribute.Error e) {
1844 throw new AssertionError(); // shouldn't happen
1845 }
1846
1847 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1848 // type.tsym.flatName() should == proxy.enumFlatName
1849 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1850 VarSymbol enumerator = null;
1851 CompletionFailure failure = null;
1852 try {
1853 for (Symbol sym : enumTypeSym.members().getSymbolsByName(proxy.enumerator)) {
1854 if (sym.kind == VAR) {
1855 enumerator = (VarSymbol)sym;
1856 break;
1857 }
1858 }
1859 }
1860 catch (CompletionFailure ex) {
1861 failure = ex;
1862 }
1863 if (enumerator == null) {
1864 if (failure != null) {
1865 log.warning("unknown.enum.constant.reason",
1866 currentClassFile, enumTypeSym, proxy.enumerator,
1867 failure.getDiagnostic());
1868 } else {
1869 log.warning("unknown.enum.constant",
1870 currentClassFile, enumTypeSym, proxy.enumerator);
1871 }
1872 result = new Attribute.Enum(enumTypeSym.type,
1873 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
1874 } else {
1875 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1876 }
1877 }
1878
1879 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1880 int length = proxy.values.length();
1881 Attribute[] ats = new Attribute[length];
1882 Type elemtype = types.elemtype(type);
1883 int i = 0;
1884 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1885 ats[i++] = deproxy(elemtype, p.head);
1886 }
1887 result = new Attribute.Array(type, ats);
1888 }
1889
1890 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1891 result = deproxyCompound(proxy);
1892 }
1893 }
1894
1895 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Runnable {
1896 final MethodSymbol sym;
1897 final Attribute value;
1898 final JavaFileObject classFile = currentClassFile;
1899
1900 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1901 super(currentOwner.kind == MTH
1902 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
1903 this.sym = sym;
1904 this.value = value;
1905 }
1906
1907 @Override
1908 public void run() {
1909 JavaFileObject previousClassFile = currentClassFile;
1910 try {
1911 // Reset the interim value set earlier in
1912 // attachAnnotationDefault().
1913 sym.defaultValue = null;
1914 currentClassFile = classFile;
1915 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1916 } finally {
1917 currentClassFile = previousClassFile;
1918 }
1919 }
1920
1921 @Override
1922 public String toString() {
1923 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1924 }
1925 }
1926
1927 class AnnotationCompleter extends AnnotationDeproxy implements Runnable {
1928 final Symbol sym;
1929 final List<CompoundAnnotationProxy> l;
1930 final JavaFileObject classFile;
1931
1932 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1933 super(currentOwner.kind == MTH
1934 ? currentOwner.enclClass() : (ClassSymbol)currentOwner);
1935 this.sym = sym;
1936 this.l = l;
1937 this.classFile = currentClassFile;
1938 }
1939
1940 @Override
1941 public void run() {
1942 JavaFileObject previousClassFile = currentClassFile;
1943 try {
1944 currentClassFile = classFile;
1945 List<Attribute.Compound> newList = deproxyCompoundList(l);
1946 if (sym.annotationsPendingCompletion()) {
1947 sym.setDeclarationAttributes(newList);
1948 } else {
1949 sym.appendAttributes(newList);
1950 }
1951 } finally {
1952 currentClassFile = previousClassFile;
1953 }
1954 }
1955
1956 @Override
1957 public String toString() {
1958 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1959 }
1960 }
1961
1962 class TypeAnnotationCompleter extends AnnotationCompleter {
1963
1964 List<TypeAnnotationProxy> proxies;
1965
1966 TypeAnnotationCompleter(Symbol sym,
1967 List<TypeAnnotationProxy> proxies) {
1968 super(sym, List.<CompoundAnnotationProxy>nil());
1969 this.proxies = proxies;
1970 }
1971
1972 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
1973 ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
1974 for (TypeAnnotationProxy proxy: proxies) {
1975 Attribute.Compound compound = deproxyCompound(proxy.compound);
1976 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
1977 buf.add(typeCompound);
1978 }
1979 return buf.toList();
1980 }
1981
1982 @Override
1983 public void run() {
1984 JavaFileObject previousClassFile = currentClassFile;
1985 try {
1986 currentClassFile = classFile;
1987 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
1988 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
1989 } finally {
1990 currentClassFile = previousClassFile;
1991 }
1992 }
1993 }
1994
1995
1996 /************************************************************************
1997 * Reading Symbols
1998 ***********************************************************************/
1999
2000 /** Read a field.
2001 */
2002 VarSymbol readField() {
2003 long flags = adjustFieldFlags(nextChar());
2004 Name name = readName(nextChar());
2005 Type type = readType(nextChar());
2006 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
2007 readMemberAttrs(v);
2008 return v;
2009 }
2010
2011 /** Read a method.
2012 */
2013 MethodSymbol readMethod() {
2014 long flags = adjustMethodFlags(nextChar());
2015 Name name = readName(nextChar());
2016 Type type = readType(nextChar());
2017 if (currentOwner.isInterface() &&
2018 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
2019 if (majorVersion > Version.V52.major ||
2020 (majorVersion == Version.V52.major && minorVersion >= Version.V52.minor)) {
2021 if ((flags & STATIC) == 0) {
2022 currentOwner.flags_field |= DEFAULT;
2023 flags |= DEFAULT | ABSTRACT;
2024 }
2025 } else {
2026 //protect against ill-formed classfiles
2027 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
2028 Integer.toString(majorVersion),
2029 Integer.toString(minorVersion));
2030 }
2031 }
2032 if (name == names.init && currentOwner.hasOuterInstance()) {
2033 // Sometimes anonymous classes don't have an outer
2034 // instance, however, there is no reliable way to tell so
2035 // we never strip this$n
2036 if (!currentOwner.name.isEmpty())
2037 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
2038 type.getReturnType(),
2039 type.getThrownTypes(),
2040 syms.methodClass);
2041 }
2042 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
2043 if (types.isSignaturePolymorphic(m)) {
2044 m.flags_field |= SIGNATURE_POLYMORPHIC;
2045 }
2046 if (saveParameterNames)
2047 initParameterNames(m);
2048 Symbol prevOwner = currentOwner;
2049 currentOwner = m;
2050 try {
2051 readMemberAttrs(m);
2052 } finally {
2053 currentOwner = prevOwner;
2054 }
2055 if (saveParameterNames)
2056 setParameterNames(m, type);
2057
2058 if ((flags & VARARGS) != 0) {
2059 final Type last = type.getParameterTypes().last();
2060 if (last == null || !last.hasTag(ARRAY)) {
2061 m.flags_field &= ~VARARGS;
2062 throw badClassFile("malformed.vararg.method", m);
2063 }
2064 }
2065
2066 return m;
2067 }
2068
2069 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2070 boolean isVarargs = (flags & VARARGS) != 0;
2071 if (isVarargs) {
2072 Type varargsElem = args.last();
2073 ListBuffer<Type> adjustedArgs = new ListBuffer<>();
2074 for (Type t : args) {
2075 adjustedArgs.append(t != varargsElem ?
2076 t :
2077 ((ArrayType)t).makeVarargs());
2078 }
2079 args = adjustedArgs.toList();
2080 }
2081 return args.tail;
2082 }
2083
2084 /**
2085 * Init the parameter names array.
2086 * Parameter names are currently inferred from the names in the
2087 * LocalVariableTable attributes of a Code attribute.
2088 * (Note: this means parameter names are currently not available for
2089 * methods without a Code attribute.)
2090 * This method initializes an array in which to store the name indexes
2091 * of parameter names found in LocalVariableTable attributes. It is
2092 * slightly supersized to allow for additional slots with a start_pc of 0.
2093 */
2094 void initParameterNames(MethodSymbol sym) {
2095 // make allowance for synthetic parameters.
2096 final int excessSlots = 4;
2097 int expectedParameterSlots =
2098 Code.width(sym.type.getParameterTypes()) + excessSlots;
2099 if (parameterNameIndices == null
2100 || parameterNameIndices.length < expectedParameterSlots) {
2101 parameterNameIndices = new int[expectedParameterSlots];
2102 } else
2103 Arrays.fill(parameterNameIndices, 0);
2104 haveParameterNameIndices = false;
2105 sawMethodParameters = false;
2106 }
2107
2108 /**
2109 * Set the parameter names for a symbol from the name index in the
2110 * parameterNameIndicies array. The type of the symbol may have changed
2111 * while reading the method attributes (see the Signature attribute).
2112 * This may be because of generic information or because anonymous
2113 * synthetic parameters were added. The original type (as read from
2114 * the method descriptor) is used to help guess the existence of
2115 * anonymous synthetic parameters.
2116 * On completion, sym.savedParameter names will either be null (if
2117 * no parameter names were found in the class file) or will be set to a
2118 * list of names, one per entry in sym.type.getParameterTypes, with
2119 * any missing names represented by the empty name.
2120 */
2121 void setParameterNames(MethodSymbol sym, Type jvmType) {
2122 // if no names were found in the class file, there's nothing more to do
2123 if (!haveParameterNameIndices)
2124 return;
2125 // If we get parameter names from MethodParameters, then we
2126 // don't need to skip.
2127 int firstParam = 0;
2128 if (!sawMethodParameters) {
2129 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2130 // the code in readMethod may have skipped the first
2131 // parameter when setting up the MethodType. If so, we
2132 // make a corresponding allowance here for the position of
2133 // the first parameter. Note that this assumes the
2134 // skipped parameter has a width of 1 -- i.e. it is not
2135 // a double width type (long or double.)
2136 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2137 // Sometimes anonymous classes don't have an outer
2138 // instance, however, there is no reliable way to tell so
2139 // we never strip this$n
2140 if (!currentOwner.name.isEmpty())
2141 firstParam += 1;
2142 }
2143
2144 if (sym.type != jvmType) {
2145 // reading the method attributes has caused the
2146 // symbol's type to be changed. (i.e. the Signature
2147 // attribute.) This may happen if there are hidden
2148 // (synthetic) parameters in the descriptor, but not
2149 // in the Signature. The position of these hidden
2150 // parameters is unspecified; for now, assume they are
2151 // at the beginning, and so skip over them. The
2152 // primary case for this is two hidden parameters
2153 // passed into Enum constructors.
2154 int skip = Code.width(jvmType.getParameterTypes())
2155 - Code.width(sym.type.getParameterTypes());
2156 firstParam += skip;
2157 }
2158 }
2159 List<Name> paramNames = List.nil();
2160 int index = firstParam;
2161 for (Type t: sym.type.getParameterTypes()) {
2162 int nameIdx = (index < parameterNameIndices.length
2163 ? parameterNameIndices[index] : 0);
2164 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2165 paramNames = paramNames.prepend(name);
2166 index += Code.width(t);
2167 }
2168 sym.savedParameterNames = paramNames.reverse();
2169 }
2170
2171 /**
2172 * skip n bytes
2173 */
2174 void skipBytes(int n) {
2175 bp = bp + n;
2176 }
2177
2178 /** Skip a field or method
2179 */
2180 void skipMember() {
2181 bp = bp + 6;
2182 char ac = nextChar();
2183 for (int i = 0; i < ac; i++) {
2184 bp = bp + 2;
2185 int attrLen = nextInt();
2186 bp = bp + attrLen;
2187 }
2188 }
2189
2190 /** Enter type variables of this classtype and all enclosing ones in
2191 * `typevars'.
2192 */
2193 protected void enterTypevars(Type t) {
2194 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
2195 enterTypevars(t.getEnclosingType());
2196 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
2197 typevars.enter(xs.head.tsym);
2198 }
2199
2200 protected void enterTypevars(Symbol sym) {
2201 if (sym.owner.kind == MTH) {
2202 enterTypevars(sym.owner);
2203 enterTypevars(sym.owner.owner);
2204 }
2205 enterTypevars(sym.type);
2206 }
2207
2208 /** Read contents of a given class symbol `c'. Both external and internal
2209 * versions of an inner class are read.
2210 */
2211 void readClass(ClassSymbol c) {
2212 ClassType ct = (ClassType)c.type;
2213
2214 // allocate scope for members
2215 c.members_field = WriteableScope.create(c);
2216
2217 // prepare type variable table
2218 typevars = typevars.dup(currentOwner);
2219 if (ct.getEnclosingType().hasTag(CLASS))
2220 enterTypevars(ct.getEnclosingType());
2221
2222 // read flags, or skip if this is an inner class
2223 long flags = adjustClassFlags(nextChar());
2224 if (c.owner.kind == PCK) c.flags_field = flags;
2225
2226 // read own class name and check that it matches
2227 ClassSymbol self = readClassSymbol(nextChar());
2228 if (c != self)
2229 throw badClassFile("class.file.wrong.class",
2230 self.flatname);
2231
2232 // class attributes must be read before class
2233 // skip ahead to read class attributes
2234 int startbp = bp;
2235 nextChar();
2236 char interfaceCount = nextChar();
2237 bp += interfaceCount * 2;
2238 char fieldCount = nextChar();
2239 for (int i = 0; i < fieldCount; i++) skipMember();
2240 char methodCount = nextChar();
2241 for (int i = 0; i < methodCount; i++) skipMember();
2242 readClassAttrs(c);
2243
2244 if (readAllOfClassFile) {
2245 for (int i = 1; i < poolObj.length; i++) readPool(i);
2246 c.pool = new Pool(poolObj.length, poolObj, types);
2247 }
2248
2249 // reset and read rest of classinfo
2250 bp = startbp;
2251 int n = nextChar();
2252 if (ct.supertype_field == null)
2253 ct.supertype_field = (n == 0)
2254 ? Type.noType
2255 : readClassSymbol(n).erasure(types);
2256 n = nextChar();
2257 List<Type> is = List.nil();
2258 for (int i = 0; i < n; i++) {
2259 Type _inter = readClassSymbol(nextChar()).erasure(types);
2260 is = is.prepend(_inter);
2261 }
2262 if (ct.interfaces_field == null)
2263 ct.interfaces_field = is.reverse();
2264
2265 Assert.check(fieldCount == nextChar());
2266 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2267 Assert.check(methodCount == nextChar());
2268 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2269
2270 typevars = typevars.leave();
2271 }
2272
2273 /** Read inner class info. For each inner/outer pair allocate a
2274 * member class.
2275 */
2276 void readInnerClasses(ClassSymbol c) {
2277 int n = nextChar();
2278 for (int i = 0; i < n; i++) {
2279 nextChar(); // skip inner class symbol
2280 ClassSymbol outer = readClassSymbol(nextChar());
2281 Name name = readName(nextChar());
2282 if (name == null) name = names.empty;
2283 long flags = adjustClassFlags(nextChar());
2284 if (outer != null) { // we have a member class
2285 if (name == names.empty)
2286 name = names.one;
2287 ClassSymbol member = syms.enterClass(name, outer);
2288 if ((flags & STATIC) == 0) {
2289 ((ClassType)member.type).setEnclosingType(outer.type);
2290 if (member.erasure_field != null)
2291 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2292 }
2293 if (c == outer) {
2294 member.flags_field = flags;
2295 enterMember(c, member);
2296 }
2297 }
2298 }
2299 }
2300
2301 /** Read a class definition from the bytes in buf.
2302 */
2303 private void readClassBuffer(ClassSymbol c) throws IOException {
2304 int magic = nextInt();
2305 if (magic != JAVA_MAGIC)
2306 throw badClassFile("illegal.start.of.class.file");
2307
2308 minorVersion = nextChar();
2309 majorVersion = nextChar();
2310 int maxMajor = Version.MAX().major;
2311 int maxMinor = Version.MAX().minor;
2312 if (majorVersion > maxMajor ||
2313 majorVersion * 1000 + minorVersion <
2314 Version.MIN().major * 1000 + Version.MIN().minor)
2315 {
2316 if (majorVersion == (maxMajor + 1))
2317 log.warning("big.major.version",
2318 currentClassFile,
2319 majorVersion,
2320 maxMajor);
2321 else
2322 throw badClassFile("wrong.version",
2323 Integer.toString(majorVersion),
2324 Integer.toString(minorVersion),
2325 Integer.toString(maxMajor),
2326 Integer.toString(maxMinor));
2327 }
2328 else if (checkClassFile &&
2329 majorVersion == maxMajor &&
2330 minorVersion > maxMinor)
2331 {
2332 printCCF("found.later.version",
2333 Integer.toString(minorVersion));
2334 }
2335 indexPool();
2336 if (signatureBuffer.length < bp) {
2337 int ns = Integer.highestOneBit(bp) << 1;
2338 signatureBuffer = new byte[ns];
2339 }
2340 readClass(c);
2341 }
2342
2343 public void readClassFile(ClassSymbol c) {
2344 currentOwner = c;
2345 currentClassFile = c.classfile;
2346 warnedAttrs.clear();
2347 filling = true;
2348 target = null;
2349 repeatable = null;
2350 try {
2351 bp = 0;
2352 buf = readInputStream(buf, c.classfile.openInputStream());
2353 readClassBuffer(c);
2354 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2355 List<Type> missing = missingTypeVariables;
2356 List<Type> found = foundTypeVariables;
2357 missingTypeVariables = List.nil();
2358 foundTypeVariables = List.nil();
2359 filling = false;
2360 ClassType ct = (ClassType)currentOwner.type;
2361 ct.supertype_field =
2362 types.subst(ct.supertype_field, missing, found);
2363 ct.interfaces_field =
2364 types.subst(ct.interfaces_field, missing, found);
2365 } else if (missingTypeVariables.isEmpty() !=
2366 foundTypeVariables.isEmpty()) {
2367 Name name = missingTypeVariables.head.tsym.name;
2368 throw badClassFile("undecl.type.var", name);
2369 }
2370
2371 if ((c.flags_field & Flags.ANNOTATION) != 0) {
2372 c.setAnnotationTypeMetadata(new AnnotationTypeMetadata(c, new CompleterDeproxy(c, target, repeatable)));
2373 } else {
2374 c.setAnnotationTypeMetadata(AnnotationTypeMetadata.notAnAnnotationType());
2375 }
2376 } catch (IOException ex) {
2377 throw badClassFile("unable.to.access.file", ex.getMessage());
2378 } catch (ArrayIndexOutOfBoundsException ex) {
2379 throw badClassFile("bad.class.file", c.flatname);
2380 } finally {
2381 missingTypeVariables = List.nil();
2382 foundTypeVariables = List.nil();
2383 filling = false;
2384 }
2385 }
2386 // where
2387 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2388 try {
2389 buf = ensureCapacity(buf, s.available());
2390 int r = s.read(buf);
2391 int bp = 0;
2392 while (r != -1) {
2393 bp += r;
2394 buf = ensureCapacity(buf, bp);
2395 r = s.read(buf, bp, buf.length - bp);
2396 }
2397 return buf;
2398 } finally {
2399 try {
2400 s.close();
2401 } catch (IOException e) {
2402 /* Ignore any errors, as this stream may have already
2403 * thrown a related exception which is the one that
2404 * should be reported.
2405 */
2406 }
2407 }
2408 }
2409 /*
2410 * ensureCapacity will increase the buffer as needed, taking note that
2411 * the new buffer will always be greater than the needed and never
2412 * exactly equal to the needed size or bp. If equal then the read (above)
2413 * will infinitely loop as buf.length - bp == 0.
2414 */
2415 private static byte[] ensureCapacity(byte[] buf, int needed) {
2416 if (buf.length <= needed) {
2417 byte[] old = buf;
2418 buf = new byte[Integer.highestOneBit(needed) << 1];
2419 System.arraycopy(old, 0, buf, 0, old.length);
2420 }
2421 return buf;
2422 }
2423
2424 /** We can only read a single class file at a time; this
2425 * flag keeps track of when we are currently reading a class
2426 * file.
2427 */
2428 public boolean filling = false;
2429
2430 /************************************************************************
2431 * Adjusting flags
2432 ***********************************************************************/
2433
2434 long adjustFieldFlags(long flags) {
2435 return flags;
2436 }
2437
2438 long adjustMethodFlags(long flags) {
2439 if ((flags & ACC_BRIDGE) != 0) {
2440 flags &= ~ACC_BRIDGE;
2441 flags |= BRIDGE;
2442 }
2443 if ((flags & ACC_VARARGS) != 0) {
2444 flags &= ~ACC_VARARGS;
2445 flags |= VARARGS;
2446 }
2447 return flags;
2448 }
2449
2450 long adjustClassFlags(long flags) {
2451 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2452 }
2453
2454 /** Output for "-checkclassfile" option.
2455 * @param key The key to look up the correct internationalized string.
2456 * @param arg An argument for substitution into the output string.
2457 */
2458 private void printCCF(String key, Object arg) {
2459 log.printLines(key, arg);
2460 }
2461
2462 /**
2463 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2464 * The attribute is only the last component of the original filename, so is unlikely
2465 * to be valid as is, so operations other than those to access the name throw
2466 * UnsupportedOperationException
2467 */
2468 private static class SourceFileObject extends BaseFileObject {
2469
2470 /** The file's name.
2471 */
2472 private Name name;
2473 private Name flatname;
2474
2475 public SourceFileObject(Name name, Name flatname) {
2476 super(null); // no file manager; never referenced for this file object
2477 this.name = name;
2478 this.flatname = flatname;
2479 }
2480
2481 @Override @DefinedBy(Api.COMPILER)
2482 public URI toUri() {
2483 try {
2484 return new URI(null, name.toString(), null);
2485 } catch (URISyntaxException e) {
2486 throw new CannotCreateUriError(name.toString(), e);
2487 }
2488 }
2489
2490 @Override @DefinedBy(Api.COMPILER)
2491 public String getName() {
2492 return name.toString();
2493 }
2494
2495 @Override
2496 public String getShortName() {
2497 return getName();
2498 }
2499
2500 @Override @DefinedBy(Api.COMPILER)
2501 public JavaFileObject.Kind getKind() {
2502 return getKind(getName());
2503 }
2504
2505 @Override @DefinedBy(Api.COMPILER)
2506 public InputStream openInputStream() {
2507 throw new UnsupportedOperationException();
2508 }
2509
2510 @Override @DefinedBy(Api.COMPILER)
2511 public OutputStream openOutputStream() {
2512 throw new UnsupportedOperationException();
2513 }
2514
2515 @Override @DefinedBy(Api.COMPILER)
2516 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2517 throw new UnsupportedOperationException();
2518 }
2519
2520 @Override @DefinedBy(Api.COMPILER)
2521 public Reader openReader(boolean ignoreEncodingErrors) {
2522 throw new UnsupportedOperationException();
2523 }
2524
2525 @Override @DefinedBy(Api.COMPILER)
2526 public Writer openWriter() {
2527 throw new UnsupportedOperationException();
2528 }
2529
2530 @Override @DefinedBy(Api.COMPILER)
2531 public long getLastModified() {
2532 throw new UnsupportedOperationException();
2533 }
2534
2535 @Override @DefinedBy(Api.COMPILER)
2536 public boolean delete() {
2537 throw new UnsupportedOperationException();
2538 }
2539
2540 @Override
2541 protected String inferBinaryName(Iterable<? extends Path> path) {
2542 return flatname.toString();
2543 }
2544
2545 @Override @DefinedBy(Api.COMPILER)
2546 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2547 return true; // fail-safe mode
2548 }
2549
2550 /**
2551 * Check if two file objects are equal.
2552 * SourceFileObjects are just placeholder objects for the value of a
2553 * SourceFile attribute, and do not directly represent specific files.
2554 * Two SourceFileObjects are equal if their names are equal.
2555 */
2556 @Override
2557 public boolean equals(Object other) {
2558 if (this == other)
2559 return true;
2560
2561 if (!(other instanceof SourceFileObject))
2562 return false;
2563
2564 SourceFileObject o = (SourceFileObject) other;
2565 return name.equals(o.name);
2566 }
2567
2568 @Override
2569 public int hashCode() {
2570 return name.hashCode();
2571 }
2572 }
2573
2574 private class CompleterDeproxy implements AnnotationTypeCompleter {
2575 ClassSymbol proxyOn;
2576 CompoundAnnotationProxy target;
2577 CompoundAnnotationProxy repeatable;
2578
2579 public CompleterDeproxy(ClassSymbol c, CompoundAnnotationProxy target,
2580 CompoundAnnotationProxy repeatable)
2581 {
2582 this.proxyOn = c;
2583 this.target = target;
2584 this.repeatable = repeatable;
2585 }
2586
2587 @Override
2588 public void complete(ClassSymbol sym) {
2589 Assert.check(proxyOn == sym);
2590 Attribute.Compound theTarget = null, theRepeatable = null;
2591 AnnotationDeproxy deproxy;
2592
2593 try {
2594 if (target != null) {
2595 deproxy = new AnnotationDeproxy(proxyOn);
2596 theTarget = deproxy.deproxyCompound(target);
2597 }
2598
2599 if (repeatable != null) {
2600 deproxy = new AnnotationDeproxy(proxyOn);
2601 theRepeatable = deproxy.deproxyCompound(repeatable);
2602 }
2603 } catch (Exception e) {
2604 throw new CompletionFailure(sym, e.getMessage());
2605 }
2606
2607 sym.getAnnotationTypeMetadata().setTarget(theTarget);
2608 sym.getAnnotationTypeMetadata().setRepeatable(theRepeatable);
2609 }
2610 }
2611 }