1 /*
2 * Copyright (c) 2007, 2024, 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.javap;
27
28 import java.lang.reflect.Modifier;
29 import java.nio.charset.StandardCharsets;
30 import java.util.List;
31 import java.util.Locale;
32 import java.lang.classfile.*;
33 import java.lang.reflect.AccessFlag;
34 import java.lang.classfile.constantpool.*;
35 import java.lang.classfile.attribute.*;
36 import static java.lang.classfile.ClassFile.*;
37 import static java.lang.classfile.attribute.StackMapFrameInfo.*;
38 import static java.lang.classfile.instruction.CharacterRange.*;
39
40 /*
41 * A writer for writing Attributes as text.
42 *
43 * <p><b>This is NOT part of any supported API.
44 * If you write code that depends on this, you do so at your own risk.
45 * This code and its internal interfaces are subject to change or
46 * deletion without notice.</b>
47 */
48 public class AttributeWriter extends BasicWriter {
49
50 public static AttributeWriter instance(Context context) {
51 AttributeWriter instance = context.get(AttributeWriter.class);
52 if (instance == null)
53 instance = new AttributeWriter(context);
54 return instance;
55 }
56
57 protected AttributeWriter(Context context) {
58 super(context);
59 context.put(AttributeWriter.class, this);
60 annotationWriter = AnnotationWriter.instance(context);
61 codeWriter = CodeWriter.instance(context);
62 constantWriter = ConstantWriter.instance(context);
63 options = Options.instance(context);
64 }
65
66 public void write(List<Attribute<?>> attrs) {
67 write(attrs, null);
68 }
69
70 public void write(List<Attribute<?>> attrs, CodeAttribute lr) {
71 if (attrs != null) {
72 for (var attr : attrs) try {
73 write(attr, lr);
74 } catch (IllegalArgumentException e) {
75 report(e);
76 }
77 }
78 }
79
80 public void write(Attribute<?> a, CodeAttribute lr) {
81 switch (a) {
82 case UnknownAttribute attr -> {
83 byte[] data = attr.contents();
84 int i = 0;
85 int j = 0;
86 print(" ");
87 print(attr.attributeName().stringValue());
88 print(": ");
89 print("length = 0x" + toHex(data.length));
90 print(" (unknown attribute)");
91 println();
92 print(" ");
93 while (i < data.length) {
94 print(toHex(data[i], 2));
95
96 j++;
97 if (j == 16) {
98 println();
99 print(" ");
100 j = 0;
101 } else {
102 print(" ");
103 }
104 i++;
105 }
106 println();
107 }
108 case AnnotationDefaultAttribute attr -> {
109 println("AnnotationDefault:");
110 indent(+1);
111 print("default_value: ");
112 annotationWriter.write(attr.defaultValue());
113 indent(-1);
114 println();
115 }
116 case BootstrapMethodsAttribute attr -> {
117 println("BootstrapMethods:");
118 for (int i = 0; i < attr.bootstrapMethodsSize() ; i++) {
119 var bsm = attr.bootstrapMethods().get(i);
120 indent(+1);
121 print(i + ": #" + bsm.bootstrapMethod().index() + " ");
122 println(constantWriter.stringValue(bsm.bootstrapMethod()));
123 indent(+1);
124 println("Method arguments:");
125 indent(+1);
126 for (var arg : bsm.arguments()) {
127 print("#" + arg.index() + " ");
128 println(constantWriter.stringValue(arg));
129 }
130 indent(-3);
131 }
132 }
133 case CharacterRangeTableAttribute attr -> {
134 println("CharacterRangeTable:");
135 indent(+1);
136 for (var e : attr.characterRangeTable()) {
137 print(String.format(" %2d, %2d, %6x, %6x, %4x",
138 e.startPc(), e.endPc(),
139 e.characterRangeStart(), e.characterRangeEnd(),
140 e.flags()));
141 tab();
142 print(String.format("// %2d, %2d, %4d:%02d, %4d:%02d",
143 e.startPc(), e.endPc(),
144 (e.characterRangeStart() >> 10),
145 (e.characterRangeStart() & 0x3ff),
146 (e.characterRangeEnd() >> 10),
147 (e.characterRangeEnd() & 0x3ff)));
148 if ((e.flags() & FLAG_STATEMENT) != 0)
149 print(", statement");
150 if ((e.flags() & FLAG_BLOCK) != 0)
151 print(", block");
152 if ((e.flags() & FLAG_ASSIGNMENT) != 0)
153 print(", assignment");
154 if ((e.flags() & FLAG_FLOW_CONTROLLER) != 0)
155 print(", flow-controller");
156 if ((e.flags() & FLAG_FLOW_TARGET) != 0)
157 print(", flow-target");
158 if ((e.flags() & FLAG_INVOKE) != 0)
159 print(", invoke");
160 if ((e.flags() & FLAG_CREATE) != 0)
161 print(", create");
162 if ((e.flags() & FLAG_BRANCH_TRUE) != 0)
163 print(", branch-true");
164 if ((e.flags() & FLAG_BRANCH_FALSE) != 0)
165 print(", branch-false");
166 println();
167 }
168 indent(-1);
169 }
170 case CodeAttribute attr -> codeWriter.write(attr);
171 case CompilationIDAttribute attr ->
172 constantWriter.write(attr.compilationId().index());
173 case ConstantValueAttribute attr -> {
174 print("ConstantValue: ");
175 constantWriter.write(attr.constant().index());
176 println();
177 }
178 case DeprecatedAttribute attr -> println("Deprecated: true");
179 case EnclosingMethodAttribute attr -> {
180 print("EnclosingMethod: #" + attr.enclosingClass().index() + ".#"
181 + attr.enclosingMethod().map(PoolEntry::index).orElse(0));
182 tab();
183 print("// " + getJavaName(attr.enclosingClass().asInternalName()));
184 if (attr.enclosingMethod().isPresent())
185 print("." + attr.enclosingMethod().get().name().stringValue());
186 println();
187 }
188 case ExceptionsAttribute attr -> {
189 println("Exceptions:");
190 indent(+1);
191 print("throws ");
192 var exc = attr.exceptions();
193 for (int i = 0; i < exc.size(); i++) {
194 if (i > 0)
195 print(", ");
196 print(getJavaName(exc.get(i).asInternalName()));
197 }
198 println();
199 indent(-1);
200 }
201 case InnerClassesAttribute attr -> {
202 boolean first = true;
203 for (var info : attr.classes()) {
204 //access
205 int access_flags = info.flagsMask();
206 if (options.checkAccess(access_flags)) {
207 if (first) {
208 println("InnerClasses:");
209 indent(+1);
210 first = false;
211 }
212 for (var flag : maskToAccessFlagsReportUnknown(access_flags, AccessFlag.Location.INNER_CLASS)) {
213 if (flag.sourceModifier() && (flag != AccessFlag.ABSTRACT
214 || !info.has(AccessFlag.INTERFACE))) {
215 print(Modifier.toString(flag.mask()) + " ");
216 }
217 }
218 if (info.innerName().isPresent()) {
219 print("#" + info.innerName().get().index() + "= ");
220 }
221 print("#" + info.innerClass().index());
222 if (info.outerClass().isPresent()) {
223 print(" of #" + info.outerClass().get().index());
224 }
225 print(";");
226 tab();
227 print("// ");
228 if (info.innerName().isPresent()) {
229 print(info.innerName().get().stringValue() + "=");
230 }
231 constantWriter.write(info.innerClass().index());
232 if (info.outerClass().isPresent()) {
233 print(" of ");
234 constantWriter.write(info.outerClass().get().index());
235 }
236 println();
237 }
238 }
239 if (!first)
240 indent(-1);
241 }
242 case LineNumberTableAttribute attr -> {
243 println("LineNumberTable:");
244 indent(+1);
245 for (var entry: attr.lineNumbers()) {
246 println("line " + entry.lineNumber() + ": " + entry.startPc());
247 }
248 indent(-1);
249 }
250 case LocalVariableTableAttribute attr -> {
251 println("LocalVariableTable:");
252 indent(+1);
253 println("Start Length Slot Name Signature");
254 for (var entry : attr.localVariables()) {
255 println(String.format("%5d %7d %5d %5s %s",
256 entry.startPc(), entry.length(), entry.slot(),
257 constantWriter.stringValue(entry.name()),
258 constantWriter.stringValue(entry.type())));
259 }
260 indent(-1);
261 }
262 case LocalVariableTypeTableAttribute attr -> {
263 println("LocalVariableTypeTable:");
264 indent(+1);
265 println("Start Length Slot Name Signature");
266 for (var entry : attr.localVariableTypes()) {
267 println(String.format("%5d %7d %5d %5s %s",
268 entry.startPc(), entry.length(), entry.slot(),
269 constantWriter.stringValue(entry.name()),
270 constantWriter.stringValue(entry.signature())));
271 }
272 indent(-1);
273 }
274 case NestHostAttribute attr -> {
275 print("NestHost: ");
276 constantWriter.write(attr.nestHost().index());
277 println();
278 }
279 case MethodParametersAttribute attr -> {
280 final String header = String.format(format, "Name", "Flags");
281 println("MethodParameters:");
282 indent(+1);
283 println(header);
284 for (var entry : attr.parameters()) {
285 String namestr =
286 entry.name().isPresent() ?
287 constantWriter.stringValue(entry.name().get()) : "<no name>";
288 String flagstr =
289 (entry.has(AccessFlag.FINAL) ? "final " : "") +
290 (entry.has(AccessFlag.MANDATED) ? "mandated " : "") +
291 (entry.has(AccessFlag.SYNTHETIC) ? "synthetic" : "");
292 println(String.format(format, namestr, flagstr));
293 }
294 indent(-1);
295 }
296 case ModuleAttribute attr -> {
297 println("Module:");
298 indent(+1);
299
300 print("#" + attr.moduleName().index());
301 print(",");
302 print(String.format("%x", attr.moduleFlagsMask()));
303 tab();
304 print("// " + constantWriter.stringValue(attr.moduleName()));
305 if (attr.has(AccessFlag.OPEN))
306 print(" ACC_OPEN");
307 if (attr.has(AccessFlag.MANDATED))
308 print(" ACC_MANDATED");
309 if (attr.has(AccessFlag.SYNTHETIC))
310 print(" ACC_SYNTHETIC");
311 println();
312 var ver = attr.moduleVersion();
313 print("#" + ver.map(Utf8Entry::index).orElse(0));
314 if (ver.isPresent()) {
315 tab();
316 print("// " + constantWriter.stringValue(ver.get()));
317 }
318 println();
319 {
320 var entries = attr.requires();
321 print(entries.size());
322 tab();
323 println("// " + "requires");
324 indent(+1);
325 for (var e: entries) {
326 print("#" + e.requires().index() + ","
327 + String.format("%x", e.requiresFlagsMask()));
328 tab();
329 print("// " + constantWriter.stringValue(e.requires()));
330 if (e.has(AccessFlag.TRANSITIVE))
331 print(" ACC_TRANSITIVE");
332 if (e.has(AccessFlag.STATIC_PHASE))
333 print(" ACC_STATIC_PHASE");
334 if (e.has(AccessFlag.SYNTHETIC))
335 print(" ACC_SYNTHETIC");
336 if (e.has(AccessFlag.MANDATED))
337 print(" ACC_MANDATED");
338 println();
339 var reqVer = e.requiresVersion();
340 print("#" + reqVer.map(Utf8Entry::index).orElse(0));
341 if (reqVer.isPresent()) {
342 tab();
343 print("// " + constantWriter.stringValue(reqVer.get()));
344 }
345 println();
346 }
347 indent(-1);
348 }
349 {
350 var entries = attr.exports();
351 print(entries.size());
352 tab();
353 println("// exports");
354 indent(+1);
355 for (var e: entries) {
356 printExportOpenEntry(e.exportedPackage().index(),
357 e.exportsFlagsMask(), e.exportsTo());
358 }
359 indent(-1);
360 }
361 {
362 var entries = attr.opens();
363 print(entries.size());
364 tab();
365 println("// opens");
366 indent(+1);
367 for (var e: entries) {
368 printExportOpenEntry(e.openedPackage().index(),
369 e.opensFlagsMask(), e.opensTo());
370 }
371 indent(-1);
372 }
373 {
374 var entries = attr.uses();
375 print(entries.size());
376 tab();
377 println("// " + "uses");
378 indent(+1);
379 for (var e: entries) {
380 print("#" + e.index());
381 tab();
382 println("// " + constantWriter.stringValue(e));
383 }
384 indent(-1);
385 }
386 {
387 var entries = attr.provides();
388 print(entries.size());
389 tab();
390 println("// " + "provides");
391 indent(+1);
392 for (var e: entries) {
393 print("#" + e.provides().index());
394 tab();
395 print("// ");
396 print(constantWriter.stringValue(e.provides()));
397 println(" with ... " + e.providesWith().size());
398 indent(+1);
399 for (var with : e.providesWith()) {
400 print("#" + with.index());
401 tab();
402 println("// ... with " + constantWriter.stringValue(with));
403 }
404 indent(-1);
405 }
406 indent(-1);
407 }
408 indent(-1);
409 }
410 case ModuleHashesAttribute attr -> {
411 println("ModuleHashes:");
412 indent(+1);
413 print("algorithm: #" + attr.algorithm().index());
414 tab();
415 println("// " + attr.algorithm().stringValue());
416 print(attr.hashes().size());
417 tab();
418 println("// hashes");
419 for (var e : attr.hashes()) {
420 print("#" + e.moduleName().index());
421 tab();
422 println("// " + e.moduleName().name().stringValue());
423 println("hash_length: " + e.hash().length);
424 println("hash: [" + toHex(e.hash()) + "]");
425 }
426 indent(-1);
427 }
428 case ModuleMainClassAttribute attr -> {
429 print("ModuleMainClass: #" + attr.mainClass().index());
430 tab();
431 print("// " + getJavaName(attr.mainClass().asInternalName()));
432 println();
433 }
434 case ModulePackagesAttribute attr -> {
435 println("ModulePackages: ");
436 indent(+1);
437 for (var p : attr.packages()) {
438 print("#" + p.index());
439 tab();
440 println("// " + getJavaName(p.name().stringValue()));
441 }
442 indent(-1);
443 }
444 case ModuleResolutionAttribute attr -> {
445 println("ModuleResolution:");
446 indent(+1);
447 print(String.format("%x", attr.resolutionFlags()));
448 tab();
449 print("// ");
450 int flags = attr.resolutionFlags();
451 if ((flags & DO_NOT_RESOLVE_BY_DEFAULT) != 0)
452 print(" DO_NOT_RESOLVE_BY_DEFAULT");
453 if ((flags & WARN_DEPRECATED) != 0)
454 print(" WARN_DEPRECATED");
455 if ((flags & WARN_DEPRECATED_FOR_REMOVAL) != 0)
456 print(" WARN_DEPRECATED_FOR_REMOVAL");
457 if ((flags & WARN_INCUBATING) != 0)
458 print(" WARN_INCUBATING");
459 println();
460 indent(-1);
461 }
462 case ModuleTargetAttribute attr -> {
463 println("ModuleTarget:");
464 indent(+1);
465 print("target_platform: #" + attr.targetPlatform().index());
466 tab();
467 println("// " + attr.targetPlatform().stringValue());
468 indent(-1);
469 }
470 case NestMembersAttribute attr -> {
471 println("NestMembers:");
472 indent(+1);
473 for (var m : attr.nestMembers()) {
474 println(constantWriter.stringValue(m));
475 }
476 indent(-1);
477 }
478 case RecordAttribute attr -> {
479 println("Record:");
480 indent(+1);
481 for (var componentInfo : attr.components()) {
482 var sigAttr = componentInfo.findAttribute(Attributes.signature());
483 print(getJavaName(
484 new ClassWriter.SignaturePrinter(options.verbose).print(
485 sigAttr.map(SignatureAttribute::asTypeSignature)
486 .orElse(Signature.of(
487 componentInfo.descriptorSymbol())))));
488 print(" ");
489 print(componentInfo.name().stringValue());
490 print(";");
491 println();
492 indent(+1);
493 if (options.showDescriptors) {
494 println("descriptor: " + componentInfo.descriptor().stringValue());
495 }
496 if (options.showAllAttrs) {
497 write(componentInfo.attributes());
498 println();
499 }
500 indent(-1);
501 }
502 indent(-1);
503 }
504 case RuntimeVisibleAnnotationsAttribute attr ->
505 printAnnotations("RuntimeVisibleAnnotations:", attr.annotations());
506 case RuntimeInvisibleAnnotationsAttribute attr ->
507 printAnnotations("RuntimeInvisibleAnnotations:", attr.annotations());
508 case RuntimeVisibleTypeAnnotationsAttribute attr ->
509 printTypeAnnotations("RuntimeVisibleTypeAnnotations:",
510 attr.annotations(), lr);
511 case RuntimeInvisibleTypeAnnotationsAttribute attr ->
512 printTypeAnnotations("RuntimeInvisibleTypeAnnotations:",
513 attr.annotations(), lr);
514 case RuntimeVisibleParameterAnnotationsAttribute attr ->
515 printParameterAnnotations("RuntimeVisibleParameterAnnotations:",
516 attr.parameterAnnotations());
517 case RuntimeInvisibleParameterAnnotationsAttribute attr ->
518 printParameterAnnotations("RuntimeInvisibleParameterAnnotations:",
519 attr.parameterAnnotations());
520 case PermittedSubclassesAttribute attr -> {
521 println("PermittedSubclasses:");
522 indent(+1);
523 for (var sc : attr.permittedSubclasses()) {
524 println(constantWriter.stringValue(sc));
525 }
526 indent(-1);
527 }
528 case SignatureAttribute attr -> {
529 print("Signature: #" + attr.signature().index());
530 tab();
531 println("// " + attr.signature().stringValue());
532 }
533 case SourceDebugExtensionAttribute attr -> {
534 println("SourceDebugExtension:");
535 indent(+1);
536 for (String s: new String(attr.contents(), StandardCharsets.UTF_8)
537 .split("[\r\n]+")) {
538 println(s);
539 }
540 indent(-1);
541 }
542 case SourceFileAttribute attr ->
543 println("SourceFile: \"" + attr.sourceFile().stringValue() + "\"");
544 case SourceIDAttribute attr ->
545 constantWriter.write(attr.sourceId().index());
546 case StackMapTableAttribute attr -> {
547 var entries = attr.entries();
548 println("StackMapTable: number_of_entries = " + entries.size());
549 indent(+1);
550 int lastOffset = -1;
551 for (var frame : entries) {
552 int frameType = frame.frameType();
553 if (frameType < 64) {
554 printHeader(frameType, "/* same */");
555 } else if (frameType < 128) {
556 printHeader(frameType, "/* same_locals_1_stack_item */");
557 indent(+1);
558 printMap("stack", frame.stack(), lr);
559 indent(-1);
560 } else {
561 int offsetDelta = lr.labelToBci(frame.target()) - lastOffset - 1;
562 switch (frameType) {
563 case 247 -> {
564 printHeader(frameType, "/* same_locals_1_stack_item_frame_extended */");
565 indent(+1);
566 println("offset_delta = " + offsetDelta);
567 printMap("stack", frame.stack(), lr);
568 indent(-1);
569 }
570 case 248, 249, 250 -> {
571 printHeader(frameType, "/* chop */");
572 indent(+1);
573 println("offset_delta = " + offsetDelta);
574 indent(-1);
575 }
576 case 251 -> {
577 printHeader(frameType, "/* same_frame_extended */");
578 indent(+1);
579 println("offset_delta = " + offsetDelta);
580 indent(-1);
581 }
582 case 252, 253, 254 -> {
583 printHeader(frameType, "/* append */");
584 indent(+1);
585 println("offset_delta = " + offsetDelta);
586 var locals = frame.locals();
587 printMap("locals", locals.subList(locals.size()
588 - frameType + 251, locals.size()), lr);
589 indent(-1);
590 }
591 case 255 -> {
592 printHeader(frameType, "/* full_frame */");
593 indent(+1);
594 println("offset_delta = " + offsetDelta);
595 printMap("locals", frame.locals(), lr);
596 printMap("stack", frame.stack(), lr);
597 indent(-1);
598 }
599 }
600 }
601 lastOffset = lr.labelToBci(frame.target());
602 }
603 indent(-1);
604 }
605 case SyntheticAttribute attr ->
606 println("Synthetic: true");
607 default -> {}
608 }
609 }
610
611 //ToDo move somewhere to Bytecode API
612 public static final int DO_NOT_RESOLVE_BY_DEFAULT = 0x0001;
613 public static final int WARN_DEPRECATED = 0x0002;
614 public static final int WARN_DEPRECATED_FOR_REMOVAL = 0x0004;
615 public static final int WARN_INCUBATING = 0x0008;
616
617 private static final String format = "%-31s%s";
618
619 protected void printExportOpenEntry(int index, int flags, List<ModuleEntry> to_index) {
620 print("#" + index + "," + String.format("%x", flags));
621 tab();
622 print("// ");
623 print(constantWriter.stringValue(index));
624 if ((flags & ACC_MANDATED) != 0)
625 print(" ACC_MANDATED");
626 if ((flags & ACC_SYNTHETIC) != 0)
627 print(" ACC_SYNTHETIC");
628 if (to_index.size() == 0) {
629 println();
630 } else {
631 println(" to ... " + to_index.size());
632 indent(+1);
633 for (var to: to_index) {
634 print("#" + to.index());
635 tab();
636 println("// ... to " + constantWriter.stringValue(to));
637 }
638 indent(-1);
639 }
640 }
641
642 private void printAnnotations(String message, List<? extends Annotation> anno) {
643 println(message);
644 indent(+1);
645 for (int i = 0; i < anno.size(); i++) {
646 print(i + ": ");
647 annotationWriter.write(anno.get(i));
648 println();
649 }
650 indent(-1);
651 }
652
653 private void printTypeAnnotations(String message,
654 List<? extends TypeAnnotation> anno, CodeAttribute lr) {
655 println(message);
656 indent(+1);
657 for (int i = 0; i < anno.size(); i++) {
658 print(i + ": ");
659 annotationWriter.write(anno.get(i), lr);
660 println();
661 }
662 indent(-1);
663 }
664
665 private void printParameterAnnotations(String message, List<List<Annotation>> paramsAnno) {
666 println(message);
667 indent(+1);
668 for (int param = 0; param < paramsAnno.size(); param++) {
669 println("parameter " + param + ": ");
670 indent(+1);
671 var annos = paramsAnno.get(param);
672 for (int i = 0; i < annos.size(); i++) {
673 print(i + ": ");
674 annotationWriter.write(annos.get(i));
675 println();
676 }
677 indent(-1);
678 }
679 indent(-1);
680 }
681
682 void printHeader(int frameType, String extra) {
683 print("frame_type = " + frameType + " ");
684 println(extra);
685 }
686
687 void printMap(String name, List<VerificationTypeInfo> map, CodeAttribute lr) {
688 print(name + " = [");
689 for (int i = 0; i < map.size(); i++) {
690 var info = map.get(i);
691 switch (info) {
692 case ObjectVerificationTypeInfo obj -> {
693 print(" ");
694 constantWriter.write(obj.className().index());
695 }
696 case UninitializedVerificationTypeInfo u -> {
697 print(" uninitialized " + lr.labelToBci(u.newTarget()));
698 }
699 case SimpleVerificationTypeInfo s ->
700 print(" " + mapTypeName(s));
701 }
702 print(i == (map.size() - 1) ? " " : ",");
703 }
704 println("]");
705 }
706
707 String mapTypeName(SimpleVerificationTypeInfo type) {
708 return switch (type) {
709 case TOP -> "top";
710 case INTEGER -> "int";
711 case FLOAT -> "float";
712 case LONG -> "long";
713 case DOUBLE -> "double";
714 case NULL -> "null";
715 case UNINITIALIZED_THIS -> "this";
716 };
717 }
718
719 static String getJavaName(String name) {
720 return name.replace('/', '.');
721 }
722
723 String toHex(byte b, int w) {
724 return toHex(b & 0xff, w);
725 }
726
727 static String toHex(int i) {
728 return Integer.toString(i, 16).toUpperCase(Locale.US);
729 }
730
731 static String toHex(int i, int w) {
732 String s = Integer.toHexString(i).toUpperCase(Locale.US);
733 while (s.length() < w)
734 s = "0" + s;
735 return s;
736 }
737
738 static String toHex(byte[] ba) {
739 StringBuilder sb = new StringBuilder(ba.length);
740 for (byte b: ba) {
741 sb.append(String.format("%02x", b & 0xff));
742 }
743 return sb.toString();
744 }
745
746 private final AnnotationWriter annotationWriter;
747 private final CodeWriter codeWriter;
748 private final ConstantWriter constantWriter;
749 private final Options options;
750 }