1 /*
2 * Copyright (c) 2022, 2023, 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 jdk.internal.classfile.impl;
27
28 import java.util.ArrayList;
29 import java.util.Collections;
30 import java.util.List;
31 import java.util.Optional;
32 import java.util.function.Function;
33
34 import java.lang.classfile.*;
35 import java.lang.classfile.attribute.*;
36 import java.lang.classfile.constantpool.ClassEntry;
37 import java.lang.classfile.constantpool.ConstantPool;
38 import java.lang.classfile.constantpool.ConstantValueEntry;
39 import java.lang.classfile.constantpool.LoadableConstantEntry;
40 import java.lang.classfile.constantpool.ModuleEntry;
41 import java.lang.classfile.constantpool.NameAndTypeEntry;
42 import java.lang.classfile.constantpool.PackageEntry;
43 import java.lang.classfile.constantpool.Utf8Entry;
44 import jdk.internal.access.SharedSecrets;
45
46 public abstract sealed class BoundAttribute<T extends Attribute<T>>
47 extends AbstractElement
48 implements Attribute<T> {
49
50 static final int NAME_AND_LENGTH_PREFIX = 6;
51 private final AttributeMapper<T> mapper;
52 final ClassReader classReader;
53 final int payloadStart;
54
55 BoundAttribute(ClassReader classReader, AttributeMapper<T> mapper, int payloadStart) {
56 this.mapper = mapper;
57 this.classReader = classReader;
58 this.payloadStart = payloadStart;
59 }
60
61 public int payloadLen() {
62 return classReader.readInt(payloadStart - 4);
63 }
64
65 @Override
66 public String attributeName() {
67 return mapper.name();
68 }
69
70 @Override
71 public AttributeMapper<T> attributeMapper() {
72 return mapper;
73 }
74
75 public byte[] contents() {
76 return classReader.readBytes(payloadStart, payloadLen());
77 }
78
79 @Override
80 public void writeTo(DirectClassBuilder builder) {
81 builder.writeAttribute(this);
82 }
83
84 @Override
85 public void writeTo(DirectCodeBuilder builder) {
86 builder.writeAttribute(this);
87 }
88
89 @Override
90 public void writeTo(DirectMethodBuilder builder) {
91 builder.writeAttribute(this);
92 }
93
94 @Override
95 public void writeTo(DirectFieldBuilder builder) {
96 builder.writeAttribute(this);
97 }
98
99 @Override
100 @SuppressWarnings("unchecked")
101 public void writeTo(BufWriter buf) {
102 if (!buf.canWriteDirect(classReader))
103 attributeMapper().writeAttribute(buf, (T) this);
104 else
105 classReader.copyBytesTo(buf, payloadStart - NAME_AND_LENGTH_PREFIX, payloadLen() + NAME_AND_LENGTH_PREFIX);
106 }
107
108 public ConstantPool constantPool() {
109 return classReader;
110 }
111
112 @Override
113 public String toString() {
114 return String.format("Attribute[name=%s]", mapper.name());
115 }
116
117 <E> List<E> readEntryList(int p) {
118 int cnt = classReader.readU2(p);
119 p += 2;
120 var entries = new Object[cnt];
121 int end = p + (cnt * 2);
122 for (int i = 0; p < end; i++, p += 2) {
123 entries[i] = classReader.readEntry(p);
124 }
125 return SharedSecrets.getJavaUtilCollectionAccess().listFromTrustedArray(entries);
126 }
127
128 public static List<Attribute<?>> readAttributes(AttributedElement enclosing, ClassReader reader, int pos,
129 Function<Utf8Entry, AttributeMapper<?>> customAttributes) {
130 int size = reader.readU2(pos);
131 var filled = new ArrayList<Attribute<?>>(size);
132 int p = pos + 2;
133 int cfLen = reader.classfileLength();
134 var apo = ((ClassReaderImpl)reader).context().attributesProcessingOption();
135 for (int i = 0; i < size; ++i) {
136 Utf8Entry name = reader.readUtf8Entry(p);
137 int len = reader.readInt(p + 2);
138 p += 6;
139 if (len < 0 || len > cfLen - p) {
140 throw new IllegalArgumentException("attribute " + name.stringValue() + " too big to handle");
141 }
142
143 var mapper = Attributes.standardAttribute(name);
144 if (mapper == null) {
145 mapper = customAttributes.apply(name);
146 }
147 if (mapper != null) {
148 filled.add((Attribute)mapper.readAttribute(enclosing, reader, p));
149 } else {
150 AttributeMapper<UnknownAttribute> fakeMapper = new AttributeMapper<>() {
151 @Override
152 public String name() {
153 return name.stringValue();
154 }
155
156 @Override
157 public UnknownAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) {
158 // Will never get called
159 throw new UnsupportedOperationException();
160 }
161
162 @Override
163 public void writeAttribute(BufWriter buf, UnknownAttribute attr) {
164 buf.writeIndex(name);
165 var cont = attr.contents();
166 buf.writeInt(cont.length);
167 buf.writeBytes(cont);
168 }
169
170 @Override
171 public boolean allowMultiple() {
172 return true;
173 }
174
175 @Override
176 public AttributeMapper.AttributeStability stability() {
177 return AttributeStability.UNKNOWN;
178 }
179 };
180 filled.add(new BoundUnknownAttribute(reader, fakeMapper, p));
181 }
182 p += len;
183 }
184 return Collections.unmodifiableList(filled);
185 }
186
187 public static final class BoundUnknownAttribute extends BoundAttribute<UnknownAttribute>
188 implements UnknownAttribute {
189 public BoundUnknownAttribute(ClassReader cf, AttributeMapper<UnknownAttribute> mapper, int pos) {
190 super(cf, mapper, pos);
191 }
192 }
193
194 public static final class BoundStackMapTableAttribute
195 extends BoundAttribute<StackMapTableAttribute>
196 implements StackMapTableAttribute {
197 final MethodModel method;
198 final LabelContext ctx;
199 List<StackMapFrameInfo> entries = null;
200
201 public BoundStackMapTableAttribute(CodeImpl code, ClassReader cf, AttributeMapper<StackMapTableAttribute> mapper, int pos) {
202 super(cf, mapper, pos);
203 method = code.parent().orElseThrow();
204 ctx = code;
205 }
206
207 @Override
208 public List<StackMapFrameInfo> entries() {
209 if (entries == null) {
210 entries = new StackMapDecoder(classReader, payloadStart, ctx, StackMapDecoder.initFrameLocals(method)).entries();
211 }
212 return entries;
213 }
214 }
215
216 public static final class BoundSyntheticAttribute extends BoundAttribute<SyntheticAttribute>
217 implements SyntheticAttribute {
218 public BoundSyntheticAttribute(ClassReader cf, AttributeMapper<SyntheticAttribute> mapper, int pos) {
219 super(cf, mapper, pos);
220 }
221 }
222
223 public static final class BoundLineNumberTableAttribute
224 extends BoundAttribute<LineNumberTableAttribute>
225 implements LineNumberTableAttribute {
226 private List<LineNumberInfo> lineNumbers = null;
227
228 public BoundLineNumberTableAttribute(ClassReader cf, AttributeMapper<LineNumberTableAttribute> mapper, int pos) {
229 super(cf, mapper, pos);
230 }
231
232 @Override
233 public List<LineNumberInfo> lineNumbers() {
234 if (lineNumbers == null) {
235 int nLn = classReader.readU2(payloadStart);
236 LineNumberInfo[] elements = new LineNumberInfo[nLn];
237 int p = payloadStart + 2;
238 int pEnd = p + (nLn * 4);
239 for (int i = 0; p < pEnd; p += 4, i++) {
240 int startPc = classReader.readU2(p);
241 int lineNumber = classReader.readU2(p + 2);
242 elements[i] = LineNumberInfo.of(startPc, lineNumber);
243 }
244 lineNumbers = List.of(elements);
245 }
246 return lineNumbers;
247 }
248 }
249
250 public static final class BoundCharacterRangeTableAttribute extends BoundAttribute<CharacterRangeTableAttribute> implements CharacterRangeTableAttribute {
251 private List<CharacterRangeInfo> characterRangeTable = null;
252
253 public BoundCharacterRangeTableAttribute(ClassReader cf, AttributeMapper<CharacterRangeTableAttribute> mapper, int pos) {
254 super(cf, mapper, pos);
255 }
256
257 @Override
258 public List<CharacterRangeInfo> characterRangeTable() {
259 if (characterRangeTable == null) {
260 int nLn = classReader.readU2(payloadStart);
261 CharacterRangeInfo[] elements = new CharacterRangeInfo[nLn];
262 int p = payloadStart + 2;
263 int pEnd = p + (nLn * 14);
264 for (int i = 0; p < pEnd; p += 14, i++) {
265 int startPc = classReader.readU2(p);
266 int endPc = classReader.readU2(p + 2);
267 int characterRangeStart = classReader.readInt(p + 4);
268 int characterRangeEnd = classReader.readInt(p + 8);
269 int flags = classReader.readU2(p + 12);
270 elements[i] = CharacterRangeInfo.of(startPc, endPc, characterRangeStart, characterRangeEnd, flags);
271 }
272 characterRangeTable = List.of(elements);
273 }
274 return characterRangeTable;
275 }
276 }
277
278 public static final class BoundLocalVariableTableAttribute
279 extends BoundAttribute<LocalVariableTableAttribute>
280 implements LocalVariableTableAttribute {
281 private final CodeImpl codeAttribute;
282 private List<LocalVariableInfo> localVars = null;
283
284 public BoundLocalVariableTableAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<LocalVariableTableAttribute> mapper, int pos) {
285 super(cf, mapper, pos);
286 codeAttribute = (CodeImpl) enclosing;
287 }
288
289 @Override
290 public List<LocalVariableInfo> localVariables() {
291 if (localVars == null) {
292 int cnt = classReader.readU2(payloadStart);
293 BoundLocalVariable[] elements = new BoundLocalVariable[cnt];
294 int p = payloadStart + 2;
295 int pEnd = p + (cnt * 10);
296 for (int i = 0; p < pEnd; p += 10, i++) {
297 elements[i] = new BoundLocalVariable(codeAttribute, p);
298 }
299 localVars = List.of(elements);
300 }
301 return localVars;
302 }
303 }
304
305 public static final class BoundLocalVariableTypeTableAttribute
306 extends BoundAttribute<LocalVariableTypeTableAttribute>
307 implements LocalVariableTypeTableAttribute {
308 private final CodeImpl codeAttribute;
309 private List<LocalVariableTypeInfo> localVars = null;
310
311 public BoundLocalVariableTypeTableAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<LocalVariableTypeTableAttribute> mapper, int pos) {
312 super(cf, mapper, pos);
313 this.codeAttribute = (CodeImpl) enclosing;
314 }
315
316 @Override
317 public List<LocalVariableTypeInfo> localVariableTypes() {
318 if (localVars == null) {
319 final int cnt = classReader.readU2(payloadStart);
320 BoundLocalVariableType[] elements = new BoundLocalVariableType[cnt];
321 int p = payloadStart + 2;
322 int pEnd = p + (cnt * 10);
323 for (int i = 0; p < pEnd; p += 10, i++) {
324 elements[i] = new BoundLocalVariableType(codeAttribute, p);
325 }
326 localVars = List.of(elements);
327 }
328 return localVars;
329 }
330 }
331
332 public static final class BoundMethodParametersAttribute extends BoundAttribute<MethodParametersAttribute>
333 implements MethodParametersAttribute {
334 private List<MethodParameterInfo> parameters = null;
335
336 public BoundMethodParametersAttribute(ClassReader cf, AttributeMapper<MethodParametersAttribute> mapper, int pos) {
337 super(cf, mapper, pos);
338 }
339
340 @Override
341 public List<MethodParameterInfo> parameters() {
342 if (parameters == null) {
343 final int cnt = classReader.readU1(payloadStart);
344 MethodParameterInfo[] elements = new MethodParameterInfo[cnt];
345 int p = payloadStart + 1;
346 int pEnd = p + (cnt * 4);
347 for (int i = 0; p < pEnd; p += 4, i++) {
348 Utf8Entry name = classReader.readUtf8EntryOrNull(p);
349 int accessFlags = classReader.readU2(p + 2);
350 elements[i] = MethodParameterInfo.of(Optional.ofNullable(name), accessFlags);
351 }
352 parameters = List.of(elements);
353 }
354 return parameters;
355 }
356 }
357
358 public static final class BoundModuleHashesAttribute extends BoundAttribute<ModuleHashesAttribute>
359 implements ModuleHashesAttribute {
360 private List<ModuleHashInfo> hashes = null;
361
362 public BoundModuleHashesAttribute(ClassReader cf, AttributeMapper<ModuleHashesAttribute> mapper, int pos) {
363 super(cf, mapper, pos);
364 }
365
366 @Override
367 public Utf8Entry algorithm() {
368 return classReader.readUtf8Entry(payloadStart);
369 }
370
371 @Override
372 public List<ModuleHashInfo> hashes() {
373 if (hashes == null) {
374 final int cnt = classReader.readU2(payloadStart + 2);
375 ModuleHashInfo[] elements = new ModuleHashInfo[cnt];
376 int p = payloadStart + 4;
377 //System.err.printf("%5d: ModuleHashesAttr alg = %s, cnt = %d%n", pos, algorithm(), cnt);
378 for (int i = 0; i < cnt; ++i) {
379 ModuleEntry module = classReader.readModuleEntry(p);
380 int hashLength = classReader.readU2(p + 2);
381 //System.err.printf("%5d: [%d] module = %s, hashLength = %d%n", p, i, module, hashLength);
382 p += 4;
383 elements[i] = ModuleHashInfo.of(module, classReader.readBytes(p, hashLength));
384 p += hashLength;
385 }
386 hashes = List.of(elements);
387 }
388 return hashes;
389 }
390 }
391
392 public static final class BoundRecordAttribute extends BoundAttribute<RecordAttribute>
393 implements RecordAttribute {
394 private List<RecordComponentInfo> components = null;
395
396 public BoundRecordAttribute(ClassReader cf, AttributeMapper<RecordAttribute> mapper, int pos) {
397 super(cf, mapper, pos);
398 }
399
400 @Override
401 public List<RecordComponentInfo> components() {
402 if (components == null) {
403 final int cnt = classReader.readU2(payloadStart);
404 RecordComponentInfo[] elements = new RecordComponentInfo[cnt];
405 int p = payloadStart + 2;
406 for (int i = 0; i < cnt; i++) {
407 elements[i] = new BoundRecordComponentInfo(classReader, p);
408 p = classReader.skipAttributeHolder(p + 4);
409 }
410 components = List.of(elements);
411 }
412 return components;
413 }
414 }
415
416 public static final class BoundDeprecatedAttribute extends BoundAttribute<DeprecatedAttribute>
417 implements DeprecatedAttribute {
418 public BoundDeprecatedAttribute(ClassReader cf, AttributeMapper<DeprecatedAttribute> mapper, int pos) {
419 super(cf, mapper, pos);
420 }
421 }
422
423 public static final class BoundSignatureAttribute extends BoundAttribute<SignatureAttribute>
424 implements SignatureAttribute {
425 public BoundSignatureAttribute(ClassReader cf, AttributeMapper<SignatureAttribute> mapper, int pos) {
426 super(cf, mapper, pos);
427 }
428
429 @Override
430 public Utf8Entry signature() {
431 return classReader.readUtf8Entry(payloadStart);
432 }
433 }
434
435 public static final class BoundSourceFileAttribute extends BoundAttribute<SourceFileAttribute>
436 implements SourceFileAttribute {
437 public BoundSourceFileAttribute(ClassReader cf, AttributeMapper<SourceFileAttribute> mapper, int pos) {
438 super(cf, mapper, pos);
439 }
440
441 @Override
442 public Utf8Entry sourceFile() {
443 return classReader.readUtf8Entry(payloadStart);
444 }
445
446 }
447
448 public static final class BoundModuleMainClassAttribute extends BoundAttribute<ModuleMainClassAttribute> implements ModuleMainClassAttribute {
449 public BoundModuleMainClassAttribute(ClassReader cf, AttributeMapper<ModuleMainClassAttribute> mapper, int pos) {
450 super(cf, mapper, pos);
451 }
452
453 @Override
454 public ClassEntry mainClass() {
455 return classReader.readClassEntry(payloadStart);
456 }
457 }
458
459 public static final class BoundNestHostAttribute extends BoundAttribute<NestHostAttribute>
460 implements NestHostAttribute {
461 public BoundNestHostAttribute(ClassReader cf, AttributeMapper<NestHostAttribute> mapper, int pos) {
462 super(cf, mapper, pos);
463 }
464
465 @Override
466 public ClassEntry nestHost() {
467 return classReader.readClassEntry(payloadStart);
468 }
469 }
470
471 public static final class BoundSourceDebugExtensionAttribute extends BoundAttribute<SourceDebugExtensionAttribute>
472 implements SourceDebugExtensionAttribute {
473 public BoundSourceDebugExtensionAttribute(ClassReader cf, AttributeMapper<SourceDebugExtensionAttribute> mapper, int pos) {
474 super(cf, mapper, pos);
475 }
476 }
477
478 public static final class BoundConstantValueAttribute extends BoundAttribute<ConstantValueAttribute>
479 implements ConstantValueAttribute {
480 public BoundConstantValueAttribute(ClassReader cf, AttributeMapper<ConstantValueAttribute> mapper, int pos) {
481 super(cf, mapper, pos);
482 }
483
484 @Override
485 public ConstantValueEntry constant() {
486 return classReader.readEntry(payloadStart, ConstantValueEntry.class);
487 }
488
489 }
490
491 public static final class BoundModuleTargetAttribute extends BoundAttribute<ModuleTargetAttribute>
492 implements ModuleTargetAttribute {
493 public BoundModuleTargetAttribute(ClassReader cf, AttributeMapper<ModuleTargetAttribute> mapper, int pos) {
494 super(cf, mapper, pos);
495 }
496
497 @Override
498 public Utf8Entry targetPlatform() {
499 return classReader.readUtf8Entry(payloadStart);
500 }
501 }
502
503 public static final class BoundCompilationIDAttribute extends BoundAttribute<CompilationIDAttribute>
504 implements CompilationIDAttribute {
505 public BoundCompilationIDAttribute(ClassReader cf, AttributeMapper<CompilationIDAttribute> mapper, int pos) {
506 super(cf, mapper, pos);
507 }
508
509 @Override
510 public Utf8Entry compilationId() {
511 return classReader.readUtf8Entry(payloadStart);
512 }
513 }
514
515 public static final class BoundSourceIDAttribute extends BoundAttribute<SourceIDAttribute>
516 implements SourceIDAttribute {
517 public BoundSourceIDAttribute(ClassReader cf, AttributeMapper<SourceIDAttribute> mapper, int pos) {
518 super(cf, mapper, pos);
519 }
520
521 @Override
522 public Utf8Entry sourceId() {
523 return classReader.readUtf8Entry(payloadStart);
524 }
525 }
526
527 public static final class BoundModuleResolutionAttribute extends BoundAttribute<ModuleResolutionAttribute>
528 implements ModuleResolutionAttribute {
529 public BoundModuleResolutionAttribute(ClassReader cf, AttributeMapper<ModuleResolutionAttribute> mapper, int pos) {
530 super(cf, mapper, pos);
531 }
532
533 @Override
534 public int resolutionFlags() {
535 return classReader.readU2(payloadStart);
536 }
537 }
538
539 public static final class BoundExceptionsAttribute extends BoundAttribute<ExceptionsAttribute>
540 implements ExceptionsAttribute {
541 private List<ClassEntry> exceptions = null;
542
543 public BoundExceptionsAttribute(ClassReader cf, AttributeMapper<ExceptionsAttribute> mapper, int pos) {
544 super(cf, mapper, pos);
545 }
546
547 @Override
548 public List<ClassEntry> exceptions() {
549 if (exceptions == null) {
550 exceptions = readEntryList(payloadStart);
551 }
552 return exceptions;
553 }
554 }
555
556 public static final class BoundModuleAttribute extends BoundAttribute<ModuleAttribute>
557 implements ModuleAttribute {
558 private List<ModuleRequireInfo> requires = null;
559 private List<ModuleExportInfo> exports = null;
560 private List<ModuleOpenInfo> opens = null;
561 private List<ClassEntry> uses = null;
562 private List<ModuleProvideInfo> provides = null;
563
564 public BoundModuleAttribute(ClassReader cf, AttributeMapper<ModuleAttribute> mapper, int pos) {
565 super(cf, mapper, pos);
566 }
567
568 @Override
569 public ModuleEntry moduleName() {
570 return classReader.readModuleEntry(payloadStart);
571 }
572
573 @Override
574 public int moduleFlagsMask() {
575 return classReader.readU2(payloadStart + 2);
576 }
577
578 @Override
579 public Optional<Utf8Entry> moduleVersion() {
580 return Optional.ofNullable(classReader.readUtf8EntryOrNull(payloadStart + 4));
581 }
582
583 @Override
584 public List<ModuleRequireInfo> requires() {
585 if (requires == null) {
586 structure();
587 }
588 return requires;
589 }
590
591 @Override
592 public List<ModuleExportInfo> exports() {
593 if (exports == null) {
594 structure();
595 }
596 return exports;
597 }
598
599 @Override
600 public List<ModuleOpenInfo> opens() {
601 if (opens == null) {
602 structure();
603 }
604 return opens;
605 }
606
607 @Override
608 public List<ClassEntry> uses() {
609 if (uses == null) {
610 structure();
611 }
612 return uses;
613 }
614
615 @Override
616 public List<ModuleProvideInfo> provides() {
617 if (provides == null) {
618 structure();
619 }
620 return provides;
621 }
622
623 private void structure() {
624 int p = payloadStart + 8;
625
626 {
627 int cnt = classReader.readU2(payloadStart + 6);
628 ModuleRequireInfo[] elements = new ModuleRequireInfo[cnt];
629 int end = p + (cnt * 6);
630 for (int i = 0; p < end; p += 6, i++) {
631 elements[i] = ModuleRequireInfo.of(classReader.readModuleEntry(p),
632 classReader.readU2(p + 2),
633 (Utf8Entry) classReader.readEntryOrNull(p + 4));
634 }
635 requires = List.of(elements);
636 }
637
638 {
639 int cnt = classReader.readU2(p);
640 p += 2;
641 ModuleExportInfo[] elements = new ModuleExportInfo[cnt];
642 for (int i = 0; i < cnt; i++) {
643 PackageEntry pe = classReader.readPackageEntry(p);
644 int exportFlags = classReader.readU2(p + 2);
645 p += 4;
646 List<ModuleEntry> exportsTo = readEntryList(p);
647 p += 2 + exportsTo.size() * 2;
648 elements[i] = ModuleExportInfo.of(pe, exportFlags, exportsTo);
649 }
650 exports = List.of(elements);
651 }
652
653 {
654 int cnt = classReader.readU2(p);
655 p += 2;
656 ModuleOpenInfo[] elements = new ModuleOpenInfo[cnt];
657 for (int i = 0; i < cnt; i++) {
658 PackageEntry po = classReader.readPackageEntry(p);
659 int opensFlags = classReader.readU2(p + 2);
660 p += 4;
661 List<ModuleEntry> opensTo = readEntryList(p);
662 p += 2 + opensTo.size() * 2;
663 elements[i] = ModuleOpenInfo.of(po, opensFlags, opensTo);
664 }
665 opens = List.of(elements);
666 }
667
668 {
669 uses = readEntryList(p);
670 p += 2 + uses.size() * 2;
671 int cnt = classReader.readU2(p);
672 p += 2;
673 ModuleProvideInfo[] elements = new ModuleProvideInfo[cnt];
674 provides = new ArrayList<>(cnt);
675 for (int i = 0; i < cnt; i++) {
676 ClassEntry c = classReader.readClassEntry(p);
677 p += 2;
678 List<ClassEntry> providesWith = readEntryList(p);
679 p += 2 + providesWith.size() * 2;
680 elements[i] = ModuleProvideInfo.of(c, providesWith);
681 }
682 provides = List.of(elements);
683 }
684 }
685 }
686
687 public static final class BoundModulePackagesAttribute extends BoundAttribute<ModulePackagesAttribute>
688 implements ModulePackagesAttribute {
689 private List<PackageEntry> packages = null;
690
691 public BoundModulePackagesAttribute(ClassReader cf, AttributeMapper<ModulePackagesAttribute> mapper, int pos) {
692 super(cf, mapper, pos);
693 }
694
695 @Override
696 public List<PackageEntry> packages() {
697 if (packages == null) {
698 packages = readEntryList(payloadStart);
699 }
700 return packages;
701 }
702 }
703
704 public static final class BoundNestMembersAttribute extends BoundAttribute<NestMembersAttribute>
705 implements NestMembersAttribute {
706
707 private List<ClassEntry> members = null;
708
709 public BoundNestMembersAttribute(ClassReader cf, AttributeMapper<NestMembersAttribute> mapper, int pos) {
710 super(cf, mapper, pos);
711 }
712
713 @Override
714 public List<ClassEntry> nestMembers() {
715 if (members == null) {
716 members = readEntryList(payloadStart);
717 }
718 return members;
719 }
720 }
721
722 public static final class BoundBootstrapMethodsAttribute extends BoundAttribute<BootstrapMethodsAttribute>
723 implements BootstrapMethodsAttribute {
724
725 private List<BootstrapMethodEntry> bootstraps = null;
726 private final int size;
727
728 public BoundBootstrapMethodsAttribute(ClassReader reader, AttributeMapper<BootstrapMethodsAttribute> mapper, int pos) {
729 super(reader, mapper, pos);
730 size = classReader.readU2(pos);
731 }
732
733 @Override
734 public int bootstrapMethodsSize() {
735 return size;
736 }
737
738 @Override
739 public List<BootstrapMethodEntry> bootstrapMethods() {
740 if (bootstraps == null) {
741 BootstrapMethodEntry[] bs = new BootstrapMethodEntry[size];
742 int p = payloadStart + 2;
743 for (int i = 0; i < size; ++i) {
744 final AbstractPoolEntry.MethodHandleEntryImpl handle
745 = (AbstractPoolEntry.MethodHandleEntryImpl) classReader.readMethodHandleEntry(p);
746 final List<LoadableConstantEntry> args = readEntryList(p + 2);
747 p += 4 + args.size() * 2;
748 int hash = BootstrapMethodEntryImpl.computeHashCode(handle, args);
749 bs[i] = new BootstrapMethodEntryImpl(classReader, i, hash, handle, args);
750 }
751 bootstraps = List.of(bs);
752 }
753 return bootstraps;
754 }
755 }
756
757 public static final class BoundInnerClassesAttribute extends BoundAttribute<InnerClassesAttribute>
758 implements InnerClassesAttribute {
759 private List<InnerClassInfo> classes;
760
761 public BoundInnerClassesAttribute(ClassReader cf, AttributeMapper<InnerClassesAttribute> mapper, int pos) {
762 super(cf, mapper, pos);
763 }
764
765 @Override
766 public List<InnerClassInfo> classes() {
767 if (classes == null) {
768 final int cnt = classReader.readU2(payloadStart);
769 int p = payloadStart + 2;
770 InnerClassInfo[] elements = new InnerClassInfo[cnt];
771 for (int i = 0; i < cnt; i++) {
772 ClassEntry innerClass = classReader.readClassEntry(p); // TODO FIXME
773 int outerClassIndex = classReader.readU2(p + 2);
774 ClassEntry outerClass = outerClassIndex == 0
775 ? null
776 : (ClassEntry) classReader.entryByIndex(outerClassIndex);
777 int innerNameIndex = classReader.readU2(p + 4);
778 Utf8Entry innerName = innerNameIndex == 0
779 ? null
780 : (Utf8Entry) classReader.entryByIndex(innerNameIndex);
781 int flags = classReader.readU2(p + 6);
782 p += 8;
783 elements[i] = InnerClassInfo.of(innerClass, Optional.ofNullable(outerClass), Optional.ofNullable(innerName), flags);
784 }
785 classes = List.of(elements);
786 }
787 return classes;
788 }
789 }
790
791 public static final class BoundEnclosingMethodAttribute extends BoundAttribute<EnclosingMethodAttribute>
792 implements EnclosingMethodAttribute {
793 public BoundEnclosingMethodAttribute(ClassReader cf, AttributeMapper<EnclosingMethodAttribute> mapper, int pos) {
794 super(cf, mapper, pos);
795 }
796
797 @Override
798 public ClassEntry enclosingClass() {
799 return classReader.readClassEntry(payloadStart);
800 }
801
802 @Override
803 public Optional<NameAndTypeEntry> enclosingMethod() {
804 return Optional.ofNullable((NameAndTypeEntry) classReader.readEntryOrNull(payloadStart + 2));
805 }
806 }
807
808 public static final class BoundAnnotationDefaultAttr
809 extends BoundAttribute<AnnotationDefaultAttribute>
810 implements AnnotationDefaultAttribute {
811 private AnnotationValue annotationValue;
812
813 public BoundAnnotationDefaultAttr(ClassReader cf, AttributeMapper<AnnotationDefaultAttribute> mapper, int pos) {
814 super(cf, mapper, pos);
815 }
816
817 @Override
818 public AnnotationValue defaultValue() {
819 if (annotationValue == null)
820 annotationValue = AnnotationReader.readElementValue(classReader, payloadStart);
821 return annotationValue;
822 }
823 }
824
825 public static final class BoundRuntimeVisibleTypeAnnotationsAttribute extends BoundAttribute<RuntimeVisibleTypeAnnotationsAttribute>
826 implements RuntimeVisibleTypeAnnotationsAttribute {
827
828 private final LabelContext labelContext;
829
830 public BoundRuntimeVisibleTypeAnnotationsAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<RuntimeVisibleTypeAnnotationsAttribute> mapper, int pos) {
831 super(cf, mapper, pos);
832 this.labelContext = (enclosing instanceof LabelContext lc) ? lc : null;
833 }
834
835 @Override
836 public List<TypeAnnotation> annotations() {
837 return AnnotationReader.readTypeAnnotations(classReader, payloadStart, labelContext);
838 }
839 }
840
841 public static final class BoundRuntimeInvisibleTypeAnnotationsAttribute
842 extends BoundAttribute<RuntimeInvisibleTypeAnnotationsAttribute>
843 implements RuntimeInvisibleTypeAnnotationsAttribute {
844 public BoundRuntimeInvisibleTypeAnnotationsAttribute(AttributedElement enclosing, ClassReader cf, AttributeMapper<RuntimeInvisibleTypeAnnotationsAttribute> mapper, int pos) {
845 super(cf, mapper, pos);
846 this.labelContext = (enclosing instanceof LabelContext lc) ? lc : null;
847 }
848
849 private final LabelContext labelContext;
850
851 @Override
852 public List<TypeAnnotation> annotations() {
853 return AnnotationReader.readTypeAnnotations(classReader, payloadStart, labelContext);
854 }
855 }
856
857 public static final class BoundRuntimeVisibleParameterAnnotationsAttribute
858 extends BoundAttribute<RuntimeVisibleParameterAnnotationsAttribute>
859 implements RuntimeVisibleParameterAnnotationsAttribute {
860
861 public BoundRuntimeVisibleParameterAnnotationsAttribute(ClassReader cf, AttributeMapper<RuntimeVisibleParameterAnnotationsAttribute> mapper, int pos) {
862 super(cf, mapper, pos);
863 }
864
865 @Override
866 public List<List<Annotation>> parameterAnnotations() {
867 return AnnotationReader.readParameterAnnotations(classReader, payloadStart);
868 }
869 }
870
871 public static final class BoundRuntimeInvisibleParameterAnnotationsAttribute
872 extends BoundAttribute<RuntimeInvisibleParameterAnnotationsAttribute>
873 implements RuntimeInvisibleParameterAnnotationsAttribute {
874
875 public BoundRuntimeInvisibleParameterAnnotationsAttribute(ClassReader cf, AttributeMapper<RuntimeInvisibleParameterAnnotationsAttribute> mapper, int pos) {
876 super(cf, mapper, pos);
877 }
878
879 @Override
880 public List<List<Annotation>> parameterAnnotations() {
881 return AnnotationReader.readParameterAnnotations(classReader, payloadStart);
882 }
883 }
884
885 public static final class BoundRuntimeInvisibleAnnotationsAttribute
886 extends BoundAttribute<RuntimeInvisibleAnnotationsAttribute>
887 implements RuntimeInvisibleAnnotationsAttribute {
888 private List<Annotation> inflated;
889
890 public BoundRuntimeInvisibleAnnotationsAttribute(ClassReader cf,
891 int payloadStart) {
892 super(cf, Attributes.RUNTIME_INVISIBLE_ANNOTATIONS, payloadStart);
893 }
894
895 @Override
896 public List<Annotation> annotations() {
897 if (inflated == null)
898 inflated = AnnotationReader.readAnnotations(classReader, payloadStart);
899 return inflated;
900 }
901 }
902
903 public static final class BoundRuntimeVisibleAnnotationsAttribute
904 extends BoundAttribute<RuntimeVisibleAnnotationsAttribute>
905 implements RuntimeVisibleAnnotationsAttribute {
906 private List<Annotation> inflated;
907
908 public BoundRuntimeVisibleAnnotationsAttribute(ClassReader cf,
909 int payloadStart) {
910 super(cf, Attributes.RUNTIME_VISIBLE_ANNOTATIONS, payloadStart);
911 }
912
913 @Override
914 public List<Annotation> annotations() {
915 if (inflated == null)
916 inflated = AnnotationReader.readAnnotations(classReader, payloadStart);
917 return inflated;
918 }
919 }
920
921 public static final class BoundPermittedSubclassesAttribute extends BoundAttribute<PermittedSubclassesAttribute>
922 implements PermittedSubclassesAttribute {
923 private List<ClassEntry> permittedSubclasses = null;
924
925 public BoundPermittedSubclassesAttribute(ClassReader cf, AttributeMapper<PermittedSubclassesAttribute> mapper, int pos) {
926 super(cf, mapper, pos);
927 }
928
929 @Override
930 public List<ClassEntry> permittedSubclasses() {
931 if (permittedSubclasses == null) {
932 permittedSubclasses = readEntryList(payloadStart);
933 }
934 return permittedSubclasses;
935 }
936 }
937
938 public static abstract sealed class BoundCodeAttribute
939 extends BoundAttribute<CodeAttribute>
940 implements CodeAttribute
941 permits CodeImpl {
942 protected final int codeStart;
943 protected final int codeLength;
944 protected final int codeEnd;
945 protected final int attributePos;
946 protected final int exceptionHandlerPos;
947 protected final int exceptionHandlerCnt;
948 protected final MethodModel enclosingMethod;
949
950 public BoundCodeAttribute(AttributedElement enclosing,
951 ClassReader reader,
952 AttributeMapper<CodeAttribute> mapper,
953 int payloadStart) {
954 super(reader, mapper, payloadStart);
955 this.codeLength = classReader.readInt(payloadStart + 4);
956 this.enclosingMethod = (MethodModel) enclosing;
957 this.codeStart = payloadStart + 8;
958 this.codeEnd = codeStart + codeLength;
959 this.exceptionHandlerPos = codeEnd;
960 this.exceptionHandlerCnt = classReader.readU2(exceptionHandlerPos);
961 this.attributePos = exceptionHandlerPos + 2 + exceptionHandlerCnt * 8;
962 }
963
964 // CodeAttribute
965
966 @Override
967 public int maxStack() {
968 return classReader.readU2(payloadStart);
969 }
970
971 @Override
972 public int maxLocals() {
973 return classReader.readU2(payloadStart + 2);
974 }
975
976 @Override
977 public int codeLength() {
978 return codeLength;
979 }
980
981 @Override
982 public byte[] codeArray() {
983 return classReader.readBytes(payloadStart + 8, codeLength());
984 }
985 }
986 }