1 /*
2 * Copyright (c) 2022, 2025, 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 package jdk.internal.classfile.impl;
26
27 import java.lang.classfile.*;
28 import java.lang.classfile.attribute.CodeAttribute;
29 import java.lang.classfile.attribute.RuntimeInvisibleTypeAnnotationsAttribute;
30 import java.lang.classfile.attribute.RuntimeVisibleTypeAnnotationsAttribute;
31 import java.lang.classfile.attribute.StackMapTableAttribute;
32 import java.lang.classfile.attribute.UnknownAttribute;
33 import java.lang.classfile.constantpool.ClassEntry;
34 import java.lang.classfile.instruction.*;
35 import java.util.ArrayList;
36 import java.util.Collections;
37 import java.util.List;
38 import java.util.Objects;
39 import java.util.Optional;
40 import java.util.function.Consumer;
41
42 import static jdk.internal.classfile.impl.RawBytecodeHelper.*;
43
44 public final class CodeImpl
45 extends BoundAttribute.BoundCodeAttribute
46 implements LabelContext {
47
48 static final Instruction[] SINGLETON_INSTRUCTIONS = new Instruction[256];
49
50 static {
51 for (var o : Opcode.values()) {
52 if (o.sizeIfFixed() == 1) {
53 SINGLETON_INSTRUCTIONS[o.bytecode()] = switch (o.kind()) {
54 case ARRAY_LOAD -> ArrayLoadInstruction.of(o);
55 case ARRAY_STORE -> ArrayStoreInstruction.of(o);
56 case CONSTANT -> ConstantInstruction.ofIntrinsic(o);
57 case CONVERT -> ConvertInstruction.of(o);
58 case LOAD -> new AbstractInstruction.UnboundLoadInstruction(o, BytecodeHelpers.intrinsicLoadSlot(o));
59 case MONITOR -> MonitorInstruction.of(o);
60 case NOP -> NopInstruction.of();
61 case OPERATOR -> OperatorInstruction.of(o);
62 case RETURN -> ReturnInstruction.of(o);
63 case STACK -> StackInstruction.of(o);
64 case STORE -> new AbstractInstruction.UnboundStoreInstruction(o, BytecodeHelpers.intrinsicStoreSlot(o));
65 case THROW_EXCEPTION -> ThrowInstruction.of();
66 default -> throw new AssertionError("invalid opcode: " + o);
67 };
68 }
69 }
70 }
71
72 List<ExceptionCatch> exceptionTable;
73 List<Attribute<?>> attributes;
74
75 // Inflated for iteration
76 LabelImpl[] labels;
77 int[] lineNumbers;
78 boolean inflated;
79
80 public CodeImpl(AttributedElement enclosing,
81 ClassReader reader,
82 AttributeMapper<CodeAttribute> mapper,
83 int payloadStart) {
84 super(enclosing, reader, mapper, payloadStart);
85 }
86
87 // LabelContext
88
89 @Override
90 public Label newLabel() {
91 throw new UnsupportedOperationException("CodeAttribute only supports fixed labels");
92 }
93
94 @Override
95 public void setLabelTarget(Label label, int bci) {
96 throw new UnsupportedOperationException("CodeAttribute only supports fixed labels");
97 }
98
99 @Override
100 public Label getLabel(int bci) {
101 if (bci < 0 || bci > codeLength)
102 throw new IllegalArgumentException(String.format("Bytecode offset out of range; bci=%d, codeLength=%d",
103 bci, codeLength));
104 if (labels == null)
105 labels = new LabelImpl[codeLength + 1];
106 LabelImpl l = labels[bci];
107 if (l == null)
108 l = labels[bci] = new LabelImpl(this, bci);
109 return l;
110 }
111
112 @Override
113 public int labelToBci(Label label) {
114 LabelImpl lab = (LabelImpl) label;
115 if (lab.labelContext() != this)
116 throw new IllegalArgumentException(String.format("Illegal label reuse; context=%s, label=%s",
117 this, lab.labelContext()));
118 return lab.getBCI();
119 }
120
121 private void inflateMetadata() {
122 if (!inflated) {
123 if (labels == null)
124 labels = new LabelImpl[codeLength + 1];
125 if (classReader.context().passLineNumbers())
126 inflateLineNumbers();
127 inflateJumpTargets();
128 inflateTypeAnnotations();
129 inflated = true;
130 }
131 }
132
133 // CodeAttribute
134
135 @Override
136 public List<Attribute<?>> attributes() {
137 if (attributes == null) {
138 attributes = BoundAttribute.readAttributes(this, classReader, attributePos, classReader.customAttributes());
139 }
140 return attributes;
141 }
142
143 @Override
144 public void writeTo(BufWriterImpl buf) {
145 var methodInfo = (MethodInfo) enclosingMethod;
146 if (Util.canSkipMethodInflation(classReader, methodInfo, buf)) {
147 super.writeTo(buf);
148 }
149 else {
150 DirectCodeBuilder.build(methodInfo,
151 Util.writingAll(this),
152 (SplitConstantPool)buf.constantPool(),
153 buf.context(),
154 null).writeTo(buf);
155 }
156 }
157
158 // CodeModel
159
160 @Override
161 public Optional<MethodModel> parent() {
162 return Optional.of(enclosingMethod);
163 }
164
165 @Override
166 public void forEach(Consumer<? super CodeElement> consumer) {
167 Objects.requireNonNull(consumer);
168 inflateMetadata();
169 boolean doLineNumbers = (lineNumbers != null);
170 generateCatchTargets(consumer);
171 if (classReader.context().passDebugElements())
172 generateDebugElements(consumer);
173 generateUserAttributes(consumer);
174 for (int pos=codeStart; pos<codeEnd; ) {
175 if (labels[pos - codeStart] != null)
176 consumer.accept(labels[pos - codeStart]);
177 if (doLineNumbers && lineNumbers[pos - codeStart] != 0)
178 consumer.accept(LineNumberImpl.of(lineNumbers[pos - codeStart]));
179 int bc = classReader.readU1(pos);
180 Instruction instr = bcToInstruction(bc, pos);
181 consumer.accept(instr);
182 pos += instr.sizeInBytes();
183 }
184 // There might be labels pointing to the bci at codeEnd
185 if (labels[codeEnd-codeStart] != null)
186 consumer.accept(labels[codeEnd - codeStart]);
187 if (doLineNumbers && lineNumbers[codeEnd - codeStart] != 0)
188 consumer.accept(LineNumberImpl.of(lineNumbers[codeEnd - codeStart]));
189 }
190
191 @Override
192 public List<ExceptionCatch> exceptionHandlers() {
193 if (exceptionTable == null) {
194 inflateMetadata();
195 exceptionTable = new ArrayList<>(exceptionHandlerCnt);
196 iterateExceptionHandlers(new ExceptionHandlerAction() {
197 @Override
198 public void accept(int s, int e, int h, int c) {
199 ClassEntry catchTypeEntry = c == 0
200 ? null
201 : constantPool().entryByIndex(c, ClassEntry.class);
202 exceptionTable.add(new AbstractPseudoInstruction.ExceptionCatchImpl(getLabel(h), getLabel(s), getLabel(e), catchTypeEntry));
203 }
204 });
205 exceptionTable = Collections.unmodifiableList(exceptionTable);
206 }
207 return exceptionTable;
208 }
209
210 private void generateUserAttributes(Consumer<? super CodeElement> consumer) {
211 for (var attr : attributes) {
212 if (attr instanceof CustomAttribute || attr instanceof UnknownAttribute) {
213 consumer.accept((CodeElement) attr);
214 }
215 }
216 }
217
218 public boolean compareCodeBytes(BufWriterImpl buf, int offset, int len) {
219 return codeLength == len
220 && classReader.compare(buf, offset, codeStart, codeLength);
221 }
222
223 private int adjustForObjectOrUninitialized(int bci) {
224 int vt = classReader.readU1(bci);
225 //inflate newTarget labels from Uninitialized VTIs
226 if (vt == 8) inflateLabel(classReader.readU2(bci + 1));
227 return (vt == 7 || vt == 8) ? bci + 3 : bci + 1;
228 }
229
230 private void inflateLabel(int bci) {
231 if (bci < 0 || bci > codeLength)
232 throw new IllegalArgumentException(String.format("Bytecode offset out of range; bci=%d, codeLength=%d",
233 bci, codeLength));
234 if (labels[bci] == null)
235 labels[bci] = new LabelImpl(this, bci);
236 }
237
238 private void inflateLineNumbers() {
239 for (Attribute<?> a : attributes()) {
240 if (a.attributeMapper() == Attributes.lineNumberTable()) {
241 BoundLineNumberTableAttribute attr = (BoundLineNumberTableAttribute) a;
242 if (lineNumbers == null)
243 lineNumbers = new int[codeLength + 1];
244
245 int nLn = classReader.readU2(attr.payloadStart);
246 int p = attr.payloadStart + 2;
247 int pEnd = p + (nLn * 4);
248 for (; p < pEnd; p += 4) {
249 int startPc = classReader.readU2(p);
250 if (startPc > codeLength) {
251 throw new IllegalArgumentException(String.format(
252 "Line number start_pc out of range; start_pc=%d, codeLength=%d", startPc, codeLength));
253 }
254 int lineNumber = classReader.readU2(p + 2);
255 lineNumbers[startPc] = lineNumber;
256 }
257 }
258 }
259 }
260
261 private void inflateJumpTargets() {
262 Optional<StackMapTableAttribute> a = findAttribute(Attributes.stackMapTable());
263 if (a.isEmpty()) {
264 if (classReader.readU2(6) <= ClassFile.JAVA_6_VERSION) {
265 //fallback to jump targets inflation without StackMapTableAttribute
266 for (int pos=codeStart; pos<codeEnd; ) {
267 var i = bcToInstruction(classReader.readU1(pos), pos);
268 switch (i.opcode().kind()) {
269 case BRANCH -> ((BranchInstruction) i).target();
270 case DISCONTINUED_JSR -> ((DiscontinuedInstruction.JsrInstruction) i).target();
271 case LOOKUP_SWITCH -> {
272 var ls = (LookupSwitchInstruction) i;
273 ls.defaultTarget();
274 ls.cases();
275 }
276 case TABLE_SWITCH -> {
277 var ts = (TableSwitchInstruction) i;
278 ts.defaultTarget();
279 ts.cases();
280 }
281 default -> {}
282 }
283 pos += i.sizeInBytes();
284 }
285 }
286 return;
287 }
288 int stackMapPos = ((BoundAttribute<StackMapTableAttribute>) a.get()).payloadStart;
289
290 int bci = -1; //compensate for offsetDelta + 1
291 int nEntries = classReader.readU2(stackMapPos);
292 int p = stackMapPos + 2;
293 for (int i = 0; i < nEntries; ++i) {
294 int frameType = classReader.readU1(p);
295 int offsetDelta = -1;
296 if (frameType < 64) {
297 offsetDelta = frameType;
298 ++p;
299 }
300 else if (frameType < 128) {
301 offsetDelta = frameType & 0x3f;
302 p = adjustForObjectOrUninitialized(p + 1);
303 }
304 else {
305 switch (frameType) {
306 case StackMapDecoder.EARLY_LARVAL -> {
307 int numberOfUnsetFields = classReader.readU2(p + 1);
308 p += 3;
309 p += 2 * numberOfUnsetFields;
310 i--; // one more enclosed frame
311 continue;
312 }
313 case 247 -> {
314 offsetDelta = classReader.readU2(p + 1);
315 p = adjustForObjectOrUninitialized(p + 3);
316 }
317 case 248, 249, 250, 251 -> {
318 offsetDelta = classReader.readU2(p + 1);
319 p += 3;
320 }
321 case 252, 253, 254 -> {
322 offsetDelta = classReader.readU2(p + 1);
323 int k = frameType - 251;
324 p += 3;
325 for (int c = 0; c < k; ++c) {
326 p = adjustForObjectOrUninitialized(p);
327 }
328 }
329 case 255 -> {
330 offsetDelta = classReader.readU2(p + 1);
331 p += 3;
332 int k = classReader.readU2(p);
333 p += 2;
334 for (int c = 0; c < k; ++c) {
335 p = adjustForObjectOrUninitialized(p);
336 }
337 k = classReader.readU2(p);
338 p += 2;
339 for (int c = 0; c < k; ++c) {
340 p = adjustForObjectOrUninitialized(p);
341 }
342 }
343 default -> throw new IllegalArgumentException("Bad frame type: " + frameType);
344 }
345 }
346 bci += offsetDelta + 1;
347 inflateLabel(bci);
348 }
349 }
350
351 private void inflateTypeAnnotations() {
352 findAttribute(Attributes.runtimeVisibleTypeAnnotations()).ifPresent(RuntimeVisibleTypeAnnotationsAttribute::annotations);
353 findAttribute(Attributes.runtimeInvisibleTypeAnnotations()).ifPresent(RuntimeInvisibleTypeAnnotationsAttribute::annotations);
354 }
355
356 private void generateCatchTargets(Consumer<? super CodeElement> consumer) {
357 // We attach all catch targets to bci zero, because trying to attach them
358 // to their range could subtly affect the order of exception processing
359 iterateExceptionHandlers(new ExceptionHandlerAction() {
360 @Override
361 public void accept(int s, int e, int h, int c) {
362 ClassEntry catchType = c == 0
363 ? null
364 : classReader.entryByIndex(c, ClassEntry.class);
365 consumer.accept(new AbstractPseudoInstruction.ExceptionCatchImpl(getLabel(h), getLabel(s), getLabel(e), catchType));
366 }
367 });
368 }
369
370 private void generateDebugElements(Consumer<? super CodeElement> consumer) {
371 for (Attribute<?> a : attributes()) {
372 if (a.attributeMapper() == Attributes.characterRangeTable()) {
373 var attr = (BoundCharacterRangeTableAttribute) a;
374 int cnt = classReader.readU2(attr.payloadStart);
375 int p = attr.payloadStart + 2;
376 int pEnd = p + (cnt * 14);
377 for (; p < pEnd; p += 14) {
378 var instruction = new BoundCharacterRange(this, p);
379 inflateLabel(instruction.startPc());
380 inflateLabel(instruction.endPc() + 1);
381 consumer.accept(instruction);
382 }
383 }
384 else if (a.attributeMapper() == Attributes.localVariableTable()) {
385 var attr = (BoundLocalVariableTableAttribute) a;
386 int cnt = classReader.readU2(attr.payloadStart);
387 int p = attr.payloadStart + 2;
388 int pEnd = p + (cnt * 10);
389 for (; p < pEnd; p += 10) {
390 BoundLocalVariable instruction = new BoundLocalVariable(this, p);
391 inflateLabel(instruction.startPc());
392 inflateLabel(instruction.startPc() + instruction.length());
393 consumer.accept(instruction);
394 }
395 }
396 else if (a.attributeMapper() == Attributes.localVariableTypeTable()) {
397 var attr = (BoundLocalVariableTypeTableAttribute) a;
398 int cnt = classReader.readU2(attr.payloadStart);
399 int p = attr.payloadStart + 2;
400 int pEnd = p + (cnt * 10);
401 for (; p < pEnd; p += 10) {
402 BoundLocalVariableType instruction = new BoundLocalVariableType(this, p);
403 inflateLabel(instruction.startPc());
404 inflateLabel(instruction.startPc() + instruction.length());
405 consumer.accept(instruction);
406 }
407 }
408 else if (a.attributeMapper() == Attributes.runtimeVisibleTypeAnnotations()) {
409 consumer.accept((BoundRuntimeVisibleTypeAnnotationsAttribute) a);
410 }
411 else if (a.attributeMapper() == Attributes.runtimeInvisibleTypeAnnotations()) {
412 consumer.accept((BoundRuntimeInvisibleTypeAnnotationsAttribute) a);
413 }
414 }
415 }
416
417 public interface ExceptionHandlerAction {
418 void accept(int start, int end, int handler, int catchTypeIndex);
419 }
420
421 public void iterateExceptionHandlers(ExceptionHandlerAction a) {
422 int p = exceptionHandlerPos + 2;
423 for (int i = 0; i < exceptionHandlerCnt; ++i) {
424 a.accept(classReader.readU2(p), classReader.readU2(p + 2), classReader.readU2(p + 4), classReader.readU2(p + 6));
425 p += 8;
426 }
427 }
428
429 private Instruction bcToInstruction(int bc, int pos) {
430 return switch (bc) {
431 case BIPUSH -> new AbstractInstruction.BoundArgumentConstantInstruction(Opcode.BIPUSH, CodeImpl.this, pos);
432 case SIPUSH -> new AbstractInstruction.BoundArgumentConstantInstruction(Opcode.SIPUSH, CodeImpl.this, pos);
433 case LDC -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC, CodeImpl.this, pos);
434 case LDC_W -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC_W, CodeImpl.this, pos);
435 case LDC2_W -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC2_W, CodeImpl.this, pos);
436 case ILOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ILOAD, CodeImpl.this, pos);
437 case LLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.LLOAD, CodeImpl.this, pos);
438 case FLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.FLOAD, CodeImpl.this, pos);
439 case DLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.DLOAD, CodeImpl.this, pos);
440 case ALOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ALOAD, CodeImpl.this, pos);
441 case ISTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ISTORE, CodeImpl.this, pos);
442 case LSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.LSTORE, CodeImpl.this, pos);
443 case FSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.FSTORE, CodeImpl.this, pos);
444 case DSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.DSTORE, CodeImpl.this, pos);
445 case ASTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ASTORE, CodeImpl.this, pos);
446 case IINC -> new AbstractInstruction.BoundIncrementInstruction(Opcode.IINC, CodeImpl.this, pos);
447 case IFEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFEQ, CodeImpl.this, pos);
448 case IFNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNE, CodeImpl.this, pos);
449 case IFLT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFLT, CodeImpl.this, pos);
450 case IFGE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFGE, CodeImpl.this, pos);
451 case IFGT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFGT, CodeImpl.this, pos);
452 case IFLE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFLE, CodeImpl.this, pos);
453 case IF_ICMPEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPEQ, CodeImpl.this, pos);
454 case IF_ICMPNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPNE, CodeImpl.this, pos);
455 case IF_ICMPLT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPLT, CodeImpl.this, pos);
456 case IF_ICMPGE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPGE, CodeImpl.this, pos);
457 case IF_ICMPGT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPGT, CodeImpl.this, pos);
458 case IF_ICMPLE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPLE, CodeImpl.this, pos);
459 case IF_ACMPEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ACMPEQ, CodeImpl.this, pos);
460 case IF_ACMPNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ACMPNE, CodeImpl.this, pos);
461 case GOTO -> new AbstractInstruction.BoundBranchInstruction(Opcode.GOTO, CodeImpl.this, pos);
462 case TABLESWITCH -> new AbstractInstruction.BoundTableSwitchInstruction(Opcode.TABLESWITCH, CodeImpl.this, pos);
463 case LOOKUPSWITCH -> new AbstractInstruction.BoundLookupSwitchInstruction(Opcode.LOOKUPSWITCH, CodeImpl.this, pos);
464 case GETSTATIC -> new AbstractInstruction.BoundFieldInstruction(Opcode.GETSTATIC, CodeImpl.this, pos);
465 case PUTSTATIC -> new AbstractInstruction.BoundFieldInstruction(Opcode.PUTSTATIC, CodeImpl.this, pos);
466 case GETFIELD -> new AbstractInstruction.BoundFieldInstruction(Opcode.GETFIELD, CodeImpl.this, pos);
467 case PUTFIELD -> new AbstractInstruction.BoundFieldInstruction(Opcode.PUTFIELD, CodeImpl.this, pos);
468 case INVOKEVIRTUAL -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKEVIRTUAL, CodeImpl.this, pos);
469 case INVOKESPECIAL -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKESPECIAL, CodeImpl.this, pos);
470 case INVOKESTATIC -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKESTATIC, CodeImpl.this, pos);
471 case INVOKEINTERFACE -> new AbstractInstruction.BoundInvokeInterfaceInstruction(Opcode.INVOKEINTERFACE, CodeImpl.this, pos);
472 case INVOKEDYNAMIC -> new AbstractInstruction.BoundInvokeDynamicInstruction(Opcode.INVOKEDYNAMIC, CodeImpl.this, pos);
473 case NEW -> new AbstractInstruction.BoundNewObjectInstruction(CodeImpl.this, pos);
474 case NEWARRAY -> new AbstractInstruction.BoundNewPrimitiveArrayInstruction(Opcode.NEWARRAY, CodeImpl.this, pos);
475 case ANEWARRAY -> new AbstractInstruction.BoundNewReferenceArrayInstruction(Opcode.ANEWARRAY, CodeImpl.this, pos);
476 case CHECKCAST -> new AbstractInstruction.BoundTypeCheckInstruction(Opcode.CHECKCAST, CodeImpl.this, pos);
477 case INSTANCEOF -> new AbstractInstruction.BoundTypeCheckInstruction(Opcode.INSTANCEOF, CodeImpl.this, pos);
478
479 case WIDE -> {
480 int bclow = classReader.readU1(pos + 1);
481 yield switch (bclow) {
482 case ILOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ILOAD_W, this, pos);
483 case LLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.LLOAD_W, this, pos);
484 case FLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.FLOAD_W, this, pos);
485 case DLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.DLOAD_W, this, pos);
486 case ALOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ALOAD_W, this, pos);
487 case ISTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ISTORE_W, this, pos);
488 case LSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.LSTORE_W, this, pos);
489 case FSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.FSTORE_W, this, pos);
490 case DSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.DSTORE_W, this, pos);
491 case ASTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ASTORE_W, this, pos);
492 case IINC -> new AbstractInstruction.BoundIncrementInstruction(Opcode.IINC_W, this, pos);
493 case RET -> new AbstractInstruction.BoundRetInstruction(Opcode.RET_W, this, pos);
494 default -> throw new IllegalArgumentException("unknown wide instruction: " + bclow);
495 };
496 }
497
498 case MULTIANEWARRAY -> new AbstractInstruction.BoundNewMultidimensionalArrayInstruction(Opcode.MULTIANEWARRAY, CodeImpl.this, pos);
499 case IFNULL -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNULL, CodeImpl.this, pos);
500 case IFNONNULL -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNONNULL, CodeImpl.this, pos);
501 case GOTO_W -> new AbstractInstruction.BoundBranchInstruction(Opcode.GOTO_W, CodeImpl.this, pos);
502
503 case JSR -> new AbstractInstruction.BoundJsrInstruction(Opcode.JSR, CodeImpl.this, pos);
504 case RET -> new AbstractInstruction.BoundRetInstruction(Opcode.RET, this, pos);
505 case JSR_W -> new AbstractInstruction.BoundJsrInstruction(Opcode.JSR_W, CodeImpl.this, pos);
506 default -> {
507 Instruction instr = SINGLETON_INSTRUCTIONS[bc];
508 if (instr == null)
509 throw new IllegalArgumentException("unknown instruction: " + bc);
510 yield instr;
511 }
512 };
513 }
514
515 @Override
516 public String toString() {
517 return String.format("CodeModel[id=%d]", System.identityHashCode(this));
518 }
519 }