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 if (buf.canWriteDirect(classReader)) {
146 super.writeTo(buf);
147 }
148 else {
149 DirectCodeBuilder.build((MethodInfo) enclosingMethod,
150 Util.writingAll(this),
151 (SplitConstantPool)buf.constantPool(),
152 buf.context(),
153 null).writeTo(buf);
154 }
155 }
156
157 // CodeModel
158
159 @Override
160 public Optional<MethodModel> parent() {
161 return Optional.of(enclosingMethod);
162 }
163
164 @Override
165 public void forEach(Consumer<? super CodeElement> consumer) {
166 Objects.requireNonNull(consumer);
167 inflateMetadata();
168 boolean doLineNumbers = (lineNumbers != null);
169 generateCatchTargets(consumer);
170 if (classReader.context().passDebugElements())
171 generateDebugElements(consumer);
172 generateUserAttributes(consumer);
173 for (int pos=codeStart; pos<codeEnd; ) {
174 if (labels[pos - codeStart] != null)
175 consumer.accept(labels[pos - codeStart]);
176 if (doLineNumbers && lineNumbers[pos - codeStart] != 0)
177 consumer.accept(LineNumberImpl.of(lineNumbers[pos - codeStart]));
178 int bc = classReader.readU1(pos);
179 Instruction instr = bcToInstruction(bc, pos);
180 consumer.accept(instr);
181 pos += instr.sizeInBytes();
182 }
183 // There might be labels pointing to the bci at codeEnd
184 if (labels[codeEnd-codeStart] != null)
185 consumer.accept(labels[codeEnd - codeStart]);
186 if (doLineNumbers && lineNumbers[codeEnd - codeStart] != 0)
187 consumer.accept(LineNumberImpl.of(lineNumbers[codeEnd - codeStart]));
188 }
189
190 @Override
191 public List<ExceptionCatch> exceptionHandlers() {
192 if (exceptionTable == null) {
193 inflateMetadata();
194 exceptionTable = new ArrayList<>(exceptionHandlerCnt);
195 iterateExceptionHandlers(new ExceptionHandlerAction() {
196 @Override
197 public void accept(int s, int e, int h, int c) {
198 ClassEntry catchTypeEntry = c == 0
199 ? null
200 : constantPool().entryByIndex(c, ClassEntry.class);
201 exceptionTable.add(new AbstractPseudoInstruction.ExceptionCatchImpl(getLabel(h), getLabel(s), getLabel(e), catchTypeEntry));
202 }
203 });
204 exceptionTable = Collections.unmodifiableList(exceptionTable);
205 }
206 return exceptionTable;
207 }
208
209 private void generateUserAttributes(Consumer<? super CodeElement> consumer) {
210 for (var attr : attributes) {
211 if (attr instanceof CustomAttribute || attr instanceof UnknownAttribute) {
212 consumer.accept((CodeElement) attr);
213 }
214 }
215 }
216
217 public boolean compareCodeBytes(BufWriterImpl buf, int offset, int len) {
218 return codeLength == len
219 && classReader.compare(buf, offset, codeStart, codeLength);
220 }
221
222 private int adjustForObjectOrUninitialized(int bci) {
223 int vt = classReader.readU1(bci);
224 //inflate newTarget labels from Uninitialized VTIs
225 if (vt == 8) inflateLabel(classReader.readU2(bci + 1));
226 return (vt == 7 || vt == 8) ? bci + 3 : bci + 1;
227 }
228
229 private void inflateLabel(int bci) {
230 if (bci < 0 || bci > codeLength)
231 throw new IllegalArgumentException(String.format("Bytecode offset out of range; bci=%d, codeLength=%d",
232 bci, codeLength));
233 if (labels[bci] == null)
234 labels[bci] = new LabelImpl(this, bci);
235 }
236
237 private void inflateLineNumbers() {
238 for (Attribute<?> a : attributes()) {
239 if (a.attributeMapper() == Attributes.lineNumberTable()) {
240 BoundLineNumberTableAttribute attr = (BoundLineNumberTableAttribute) a;
241 if (lineNumbers == null)
242 lineNumbers = new int[codeLength + 1];
243
244 int nLn = classReader.readU2(attr.payloadStart);
245 int p = attr.payloadStart + 2;
246 int pEnd = p + (nLn * 4);
247 for (; p < pEnd; p += 4) {
248 int startPc = classReader.readU2(p);
249 if (startPc > codeLength) {
250 throw new IllegalArgumentException(String.format(
251 "Line number start_pc out of range; start_pc=%d, codeLength=%d", startPc, codeLength));
252 }
253 int lineNumber = classReader.readU2(p + 2);
254 lineNumbers[startPc] = lineNumber;
255 }
256 }
257 }
258 }
259
260 private void inflateJumpTargets() {
261 Optional<StackMapTableAttribute> a = findAttribute(Attributes.stackMapTable());
262 if (a.isEmpty()) {
263 if (classReader.readU2(6) <= ClassFile.JAVA_6_VERSION) {
264 //fallback to jump targets inflation without StackMapTableAttribute
265 for (int pos=codeStart; pos<codeEnd; ) {
266 var i = bcToInstruction(classReader.readU1(pos), pos);
267 switch (i.opcode().kind()) {
268 case BRANCH -> ((BranchInstruction) i).target();
269 case DISCONTINUED_JSR -> ((DiscontinuedInstruction.JsrInstruction) i).target();
270 case LOOKUP_SWITCH -> {
271 var ls = (LookupSwitchInstruction) i;
272 ls.defaultTarget();
273 ls.cases();
274 }
275 case TABLE_SWITCH -> {
276 var ts = (TableSwitchInstruction) i;
277 ts.defaultTarget();
278 ts.cases();
279 }
280 default -> {}
281 }
282 pos += i.sizeInBytes();
283 }
284 }
285 return;
286 }
287 int stackMapPos = ((BoundAttribute<StackMapTableAttribute>) a.get()).payloadStart;
288
289 int bci = -1; //compensate for offsetDelta + 1
290 int nEntries = classReader.readU2(stackMapPos);
291 int p = stackMapPos + 2;
292 for (int i = 0; i < nEntries; ++i) {
293 int frameType = classReader.readU1(p);
294 int offsetDelta;
295 if (frameType < 64) {
296 offsetDelta = frameType;
297 ++p;
298 }
299 else if (frameType < 128) {
300 offsetDelta = frameType & 0x3f;
301 p = adjustForObjectOrUninitialized(p + 1);
302 }
303 else
304 switch (frameType) {
305 case 247 -> {
306 offsetDelta = classReader.readU2(p + 1);
307 p = adjustForObjectOrUninitialized(p + 3);
308 }
309 case 248, 249, 250, 251 -> {
310 offsetDelta = classReader.readU2(p + 1);
311 p += 3;
312 }
313 case 252, 253, 254 -> {
314 offsetDelta = classReader.readU2(p + 1);
315 int k = frameType - 251;
316 p += 3;
317 for (int c = 0; c < k; ++c) {
318 p = adjustForObjectOrUninitialized(p);
319 }
320 }
321 case 255 -> {
322 offsetDelta = classReader.readU2(p + 1);
323 p += 3;
324 int k = classReader.readU2(p);
325 p += 2;
326 for (int c = 0; c < k; ++c) {
327 p = adjustForObjectOrUninitialized(p);
328 }
329 k = classReader.readU2(p);
330 p += 2;
331 for (int c = 0; c < k; ++c) {
332 p = adjustForObjectOrUninitialized(p);
333 }
334 }
335 default -> throw new IllegalArgumentException("Bad frame type: " + frameType);
336 }
337 bci += offsetDelta + 1;
338 inflateLabel(bci);
339 }
340 }
341
342 private void inflateTypeAnnotations() {
343 findAttribute(Attributes.runtimeVisibleTypeAnnotations()).ifPresent(RuntimeVisibleTypeAnnotationsAttribute::annotations);
344 findAttribute(Attributes.runtimeInvisibleTypeAnnotations()).ifPresent(RuntimeInvisibleTypeAnnotationsAttribute::annotations);
345 }
346
347 private void generateCatchTargets(Consumer<? super CodeElement> consumer) {
348 // We attach all catch targets to bci zero, because trying to attach them
349 // to their range could subtly affect the order of exception processing
350 iterateExceptionHandlers(new ExceptionHandlerAction() {
351 @Override
352 public void accept(int s, int e, int h, int c) {
353 ClassEntry catchType = c == 0
354 ? null
355 : classReader.entryByIndex(c, ClassEntry.class);
356 consumer.accept(new AbstractPseudoInstruction.ExceptionCatchImpl(getLabel(h), getLabel(s), getLabel(e), catchType));
357 }
358 });
359 }
360
361 private void generateDebugElements(Consumer<? super CodeElement> consumer) {
362 for (Attribute<?> a : attributes()) {
363 if (a.attributeMapper() == Attributes.characterRangeTable()) {
364 var attr = (BoundCharacterRangeTableAttribute) a;
365 int cnt = classReader.readU2(attr.payloadStart);
366 int p = attr.payloadStart + 2;
367 int pEnd = p + (cnt * 14);
368 for (; p < pEnd; p += 14) {
369 var instruction = new BoundCharacterRange(this, p);
370 inflateLabel(instruction.startPc());
371 inflateLabel(instruction.endPc() + 1);
372 consumer.accept(instruction);
373 }
374 }
375 else if (a.attributeMapper() == Attributes.localVariableTable()) {
376 var attr = (BoundLocalVariableTableAttribute) a;
377 int cnt = classReader.readU2(attr.payloadStart);
378 int p = attr.payloadStart + 2;
379 int pEnd = p + (cnt * 10);
380 for (; p < pEnd; p += 10) {
381 BoundLocalVariable instruction = new BoundLocalVariable(this, p);
382 inflateLabel(instruction.startPc());
383 inflateLabel(instruction.startPc() + instruction.length());
384 consumer.accept(instruction);
385 }
386 }
387 else if (a.attributeMapper() == Attributes.localVariableTypeTable()) {
388 var attr = (BoundLocalVariableTypeTableAttribute) a;
389 int cnt = classReader.readU2(attr.payloadStart);
390 int p = attr.payloadStart + 2;
391 int pEnd = p + (cnt * 10);
392 for (; p < pEnd; p += 10) {
393 BoundLocalVariableType instruction = new BoundLocalVariableType(this, p);
394 inflateLabel(instruction.startPc());
395 inflateLabel(instruction.startPc() + instruction.length());
396 consumer.accept(instruction);
397 }
398 }
399 else if (a.attributeMapper() == Attributes.runtimeVisibleTypeAnnotations()) {
400 consumer.accept((BoundRuntimeVisibleTypeAnnotationsAttribute) a);
401 }
402 else if (a.attributeMapper() == Attributes.runtimeInvisibleTypeAnnotations()) {
403 consumer.accept((BoundRuntimeInvisibleTypeAnnotationsAttribute) a);
404 }
405 }
406 }
407
408 public interface ExceptionHandlerAction {
409 void accept(int start, int end, int handler, int catchTypeIndex);
410 }
411
412 public void iterateExceptionHandlers(ExceptionHandlerAction a) {
413 int p = exceptionHandlerPos + 2;
414 for (int i = 0; i < exceptionHandlerCnt; ++i) {
415 a.accept(classReader.readU2(p), classReader.readU2(p + 2), classReader.readU2(p + 4), classReader.readU2(p + 6));
416 p += 8;
417 }
418 }
419
420 private Instruction bcToInstruction(int bc, int pos) {
421 return switch (bc) {
422 case BIPUSH -> new AbstractInstruction.BoundArgumentConstantInstruction(Opcode.BIPUSH, CodeImpl.this, pos);
423 case SIPUSH -> new AbstractInstruction.BoundArgumentConstantInstruction(Opcode.SIPUSH, CodeImpl.this, pos);
424 case LDC -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC, CodeImpl.this, pos);
425 case LDC_W -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC_W, CodeImpl.this, pos);
426 case LDC2_W -> new AbstractInstruction.BoundLoadConstantInstruction(Opcode.LDC2_W, CodeImpl.this, pos);
427 case ILOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ILOAD, CodeImpl.this, pos);
428 case LLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.LLOAD, CodeImpl.this, pos);
429 case FLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.FLOAD, CodeImpl.this, pos);
430 case DLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.DLOAD, CodeImpl.this, pos);
431 case ALOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ALOAD, CodeImpl.this, pos);
432 case ISTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ISTORE, CodeImpl.this, pos);
433 case LSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.LSTORE, CodeImpl.this, pos);
434 case FSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.FSTORE, CodeImpl.this, pos);
435 case DSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.DSTORE, CodeImpl.this, pos);
436 case ASTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ASTORE, CodeImpl.this, pos);
437 case IINC -> new AbstractInstruction.BoundIncrementInstruction(Opcode.IINC, CodeImpl.this, pos);
438 case IFEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFEQ, CodeImpl.this, pos);
439 case IFNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNE, CodeImpl.this, pos);
440 case IFLT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFLT, CodeImpl.this, pos);
441 case IFGE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFGE, CodeImpl.this, pos);
442 case IFGT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFGT, CodeImpl.this, pos);
443 case IFLE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFLE, CodeImpl.this, pos);
444 case IF_ICMPEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPEQ, CodeImpl.this, pos);
445 case IF_ICMPNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPNE, CodeImpl.this, pos);
446 case IF_ICMPLT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPLT, CodeImpl.this, pos);
447 case IF_ICMPGE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPGE, CodeImpl.this, pos);
448 case IF_ICMPGT -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPGT, CodeImpl.this, pos);
449 case IF_ICMPLE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ICMPLE, CodeImpl.this, pos);
450 case IF_ACMPEQ -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ACMPEQ, CodeImpl.this, pos);
451 case IF_ACMPNE -> new AbstractInstruction.BoundBranchInstruction(Opcode.IF_ACMPNE, CodeImpl.this, pos);
452 case GOTO -> new AbstractInstruction.BoundBranchInstruction(Opcode.GOTO, CodeImpl.this, pos);
453 case TABLESWITCH -> new AbstractInstruction.BoundTableSwitchInstruction(Opcode.TABLESWITCH, CodeImpl.this, pos);
454 case LOOKUPSWITCH -> new AbstractInstruction.BoundLookupSwitchInstruction(Opcode.LOOKUPSWITCH, CodeImpl.this, pos);
455 case GETSTATIC -> new AbstractInstruction.BoundFieldInstruction(Opcode.GETSTATIC, CodeImpl.this, pos);
456 case PUTSTATIC -> new AbstractInstruction.BoundFieldInstruction(Opcode.PUTSTATIC, CodeImpl.this, pos);
457 case GETFIELD -> new AbstractInstruction.BoundFieldInstruction(Opcode.GETFIELD, CodeImpl.this, pos);
458 case PUTFIELD -> new AbstractInstruction.BoundFieldInstruction(Opcode.PUTFIELD, CodeImpl.this, pos);
459 case INVOKEVIRTUAL -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKEVIRTUAL, CodeImpl.this, pos);
460 case INVOKESPECIAL -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKESPECIAL, CodeImpl.this, pos);
461 case INVOKESTATIC -> new AbstractInstruction.BoundInvokeInstruction(Opcode.INVOKESTATIC, CodeImpl.this, pos);
462 case INVOKEINTERFACE -> new AbstractInstruction.BoundInvokeInterfaceInstruction(Opcode.INVOKEINTERFACE, CodeImpl.this, pos);
463 case INVOKEDYNAMIC -> new AbstractInstruction.BoundInvokeDynamicInstruction(Opcode.INVOKEDYNAMIC, CodeImpl.this, pos);
464 case NEW -> new AbstractInstruction.BoundNewObjectInstruction(CodeImpl.this, pos);
465 case NEWARRAY -> new AbstractInstruction.BoundNewPrimitiveArrayInstruction(Opcode.NEWARRAY, CodeImpl.this, pos);
466 case ANEWARRAY -> new AbstractInstruction.BoundNewReferenceArrayInstruction(Opcode.ANEWARRAY, CodeImpl.this, pos);
467 case CHECKCAST -> new AbstractInstruction.BoundTypeCheckInstruction(Opcode.CHECKCAST, CodeImpl.this, pos);
468 case INSTANCEOF -> new AbstractInstruction.BoundTypeCheckInstruction(Opcode.INSTANCEOF, CodeImpl.this, pos);
469
470 case WIDE -> {
471 int bclow = classReader.readU1(pos + 1);
472 yield switch (bclow) {
473 case ILOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ILOAD_W, this, pos);
474 case LLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.LLOAD_W, this, pos);
475 case FLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.FLOAD_W, this, pos);
476 case DLOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.DLOAD_W, this, pos);
477 case ALOAD -> new AbstractInstruction.BoundLoadInstruction(Opcode.ALOAD_W, this, pos);
478 case ISTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ISTORE_W, this, pos);
479 case LSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.LSTORE_W, this, pos);
480 case FSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.FSTORE_W, this, pos);
481 case DSTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.DSTORE_W, this, pos);
482 case ASTORE -> new AbstractInstruction.BoundStoreInstruction(Opcode.ASTORE_W, this, pos);
483 case IINC -> new AbstractInstruction.BoundIncrementInstruction(Opcode.IINC_W, this, pos);
484 case RET -> new AbstractInstruction.BoundRetInstruction(Opcode.RET_W, this, pos);
485 default -> throw new IllegalArgumentException("unknown wide instruction: " + bclow);
486 };
487 }
488
489 case MULTIANEWARRAY -> new AbstractInstruction.BoundNewMultidimensionalArrayInstruction(Opcode.MULTIANEWARRAY, CodeImpl.this, pos);
490 case IFNULL -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNULL, CodeImpl.this, pos);
491 case IFNONNULL -> new AbstractInstruction.BoundBranchInstruction(Opcode.IFNONNULL, CodeImpl.this, pos);
492 case GOTO_W -> new AbstractInstruction.BoundBranchInstruction(Opcode.GOTO_W, CodeImpl.this, pos);
493
494 case JSR -> new AbstractInstruction.BoundJsrInstruction(Opcode.JSR, CodeImpl.this, pos);
495 case RET -> new AbstractInstruction.BoundRetInstruction(Opcode.RET, this, pos);
496 case JSR_W -> new AbstractInstruction.BoundJsrInstruction(Opcode.JSR_W, CodeImpl.this, pos);
497 default -> {
498 Instruction instr = SINGLETON_INSTRUCTIONS[bc];
499 if (instr == null)
500 throw new IllegalArgumentException("unknown instruction: " + bc);
501 yield instr;
502 }
503 };
504 }
505
506 @Override
507 public String toString() {
508 return String.format("CodeModel[id=%d]", System.identityHashCode(this));
509 }
510 }