001 /*
002 /*
003 * Copyright 2010-2013 JetBrains s.r.o.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.jetbrains.jet.codegen;
019
020 import com.intellij.openapi.progress.ProcessCanceledException;
021 import com.intellij.psi.PsiElement;
022 import org.jetbrains.annotations.NotNull;
023 import org.jetbrains.annotations.Nullable;
024 import org.jetbrains.asm4.AnnotationVisitor;
025 import org.jetbrains.asm4.Label;
026 import org.jetbrains.asm4.MethodVisitor;
027 import org.jetbrains.asm4.Type;
028 import org.jetbrains.asm4.commons.InstructionAdapter;
029 import org.jetbrains.asm4.commons.Method;
030 import org.jetbrains.asm4.util.TraceMethodVisitor;
031 import org.jetbrains.jet.codegen.binding.CodegenBinding;
032 import org.jetbrains.jet.codegen.context.CodegenContext;
033 import org.jetbrains.jet.codegen.context.MethodContext;
034 import org.jetbrains.jet.codegen.context.PackageFacadeContext;
035 import org.jetbrains.jet.codegen.signature.JvmMethodParameterKind;
036 import org.jetbrains.jet.codegen.signature.JvmMethodParameterSignature;
037 import org.jetbrains.jet.codegen.signature.JvmMethodSignature;
038 import org.jetbrains.jet.codegen.state.GenerationState;
039 import org.jetbrains.jet.codegen.state.JetTypeMapper;
040 import org.jetbrains.jet.lang.descriptors.*;
041 import org.jetbrains.jet.lang.psi.JetNamedFunction;
042 import org.jetbrains.jet.lang.resolve.BindingContext;
043 import org.jetbrains.jet.lang.resolve.java.JvmAbi;
044
045 import java.io.PrintWriter;
046 import java.io.StringWriter;
047 import java.util.*;
048
049 import static org.jetbrains.asm4.Opcodes.*;
050 import static org.jetbrains.jet.codegen.AsmUtil.*;
051 import static org.jetbrains.jet.codegen.JvmSerializationBindings.*;
052 import static org.jetbrains.jet.codegen.binding.CodegenBinding.asmTypeForAnonymousClass;
053 import static org.jetbrains.jet.codegen.binding.CodegenBinding.isLocalNamedFun;
054 import static org.jetbrains.jet.lang.resolve.BindingContextUtils.callableDescriptorToDeclaration;
055 import static org.jetbrains.jet.lang.resolve.BindingContextUtils.descriptorToDeclaration;
056 import static org.jetbrains.jet.lang.resolve.DescriptorUtils.isFunctionLiteral;
057 import static org.jetbrains.jet.lang.resolve.java.AsmTypeConstants.OBJECT_TYPE;
058 import static org.jetbrains.jet.lang.resolve.java.JvmAnnotationNames.OLD_JET_VALUE_PARAMETER_ANNOTATION;
059
060 public class FunctionCodegen extends ParentCodegenAwareImpl {
061 private final CodegenContext owner;
062
063 private final ClassBuilder v;
064
065 public FunctionCodegen(@NotNull CodegenContext owner, @NotNull ClassBuilder v, @NotNull GenerationState state, MemberCodegen parentCodegen) {
066 super(state, parentCodegen);
067 this.owner = owner;
068 this.v = v;
069 }
070
071 public void gen(@NotNull JetNamedFunction function) {
072 SimpleFunctionDescriptor functionDescriptor = bindingContext.get(BindingContext.FUNCTION, function);
073 assert functionDescriptor != null : "No descriptor for function " + function.getText() + "\n" +
074 "in " + function.getContainingFile().getVirtualFile();
075
076 OwnerKind kind = owner.getContextKind();
077 JvmMethodSignature method = typeMapper.mapSignature(functionDescriptor, kind);
078
079 if (kind != OwnerKind.TRAIT_IMPL || function.getBodyExpression() != null) {
080 generateMethod(function, method, functionDescriptor,
081 new FunctionGenerationStrategy.FunctionDefault(state, functionDescriptor, function));
082 }
083
084 generateDefaultIfNeeded(owner.intoFunction(functionDescriptor), method, functionDescriptor, kind,
085 DefaultParameterValueLoader.DEFAULT);
086 }
087
088 public void generateMethod(
089 @Nullable PsiElement origin,
090 @NotNull JvmMethodSignature jvmSignature,
091 @NotNull FunctionDescriptor functionDescriptor,
092 @NotNull FunctionGenerationStrategy strategy
093 ) {
094 generateMethod(origin, jvmSignature, functionDescriptor, owner.intoFunction(functionDescriptor), strategy);
095 }
096
097 public void generateMethod(
098 @Nullable PsiElement origin,
099 @NotNull JvmMethodSignature jvmSignature,
100 @NotNull FunctionDescriptor functionDescriptor,
101 @NotNull MethodContext methodContext,
102 @NotNull FunctionGenerationStrategy strategy
103 ) {
104 Method asmMethod = jvmSignature.getAsmMethod();
105
106 MethodVisitor mv = v.newMethod(origin,
107 getMethodAsmFlags(functionDescriptor, methodContext.getContextKind()),
108 asmMethod.getName(),
109 asmMethod.getDescriptor(),
110 jvmSignature.getGenericsSignature(),
111 CodegenUtil.getExceptions(functionDescriptor, typeMapper));
112
113 if (owner instanceof PackageFacadeContext) {
114 Type ownerType = ((PackageFacadeContext) owner).getDelegateToClassType();
115 v.getSerializationBindings().put(IMPL_CLASS_NAME_FOR_CALLABLE, functionDescriptor, shortNameByAsmType(ownerType));
116 }
117 else {
118 v.getSerializationBindings().put(METHOD_FOR_FUNCTION, functionDescriptor, asmMethod);
119 }
120
121 AnnotationCodegen.forMethod(mv, typeMapper).genAnnotations(functionDescriptor);
122
123 generateParameterAnnotations(functionDescriptor, mv, jvmSignature);
124
125 generateJetValueParameterAnnotations(mv, functionDescriptor, jvmSignature);
126
127 if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES ||
128 isAbstractMethod(functionDescriptor, methodContext.getContextKind())) {
129 generateLocalVariableTable(
130 mv,
131 jvmSignature,
132 functionDescriptor,
133 getThisTypeForFunction(functionDescriptor, methodContext),
134 new Label(),
135 new Label(),
136 methodContext.getContextKind()
137 );
138 return;
139 }
140
141 generateMethodBody(mv, functionDescriptor, methodContext, jvmSignature, strategy);
142
143 endVisit(mv, null, origin);
144
145 generateBridgeIfNeeded(owner, state, v, functionDescriptor);
146
147 methodContext.recordSyntheticAccessorIfNeeded(functionDescriptor, bindingContext);
148 }
149
150 private void generateParameterAnnotations(
151 @NotNull FunctionDescriptor functionDescriptor,
152 @NotNull MethodVisitor mv,
153 @NotNull JvmMethodSignature jvmSignature
154 ) {
155 Iterator<ValueParameterDescriptor> iterator = functionDescriptor.getValueParameters().iterator();
156 List<JvmMethodParameterSignature> kotlinParameterTypes = jvmSignature.getValueParameters();
157
158 for (int i = 0; i < kotlinParameterTypes.size(); i++) {
159 JvmMethodParameterKind kind = kotlinParameterTypes.get(i).getKind();
160 if (kind == JvmMethodParameterKind.ENUM_NAME || kind == JvmMethodParameterKind.ENUM_ORDINAL) {
161 markEnumConstructorParameterAsSynthetic(mv, i);
162 continue;
163 }
164
165 if (kind == JvmMethodParameterKind.VALUE) {
166 ValueParameterDescriptor parameter = iterator.next();
167 v.getSerializationBindings().put(INDEX_FOR_VALUE_PARAMETER, parameter, i);
168 AnnotationCodegen.forParameter(i, mv, typeMapper).genAnnotations(parameter);
169 }
170 }
171 }
172
173 @SuppressWarnings("deprecation")
174 private void generateJetValueParameterAnnotations(
175 @NotNull MethodVisitor mv,
176 @NotNull FunctionDescriptor functionDescriptor,
177 @NotNull JvmMethodSignature jvmSignature
178 ) {
179 Iterator<ValueParameterDescriptor> descriptors = functionDescriptor.getValueParameters().iterator();
180 List<JvmMethodParameterSignature> kotlinParameterTypes = jvmSignature.getValueParameters();
181
182 for (int i = 0; i < kotlinParameterTypes.size(); i++) {
183 JvmMethodParameterKind kind = kotlinParameterTypes.get(i).getKind();
184 if (kind == JvmMethodParameterKind.ENUM_NAME || kind == JvmMethodParameterKind.ENUM_ORDINAL) {
185 markEnumConstructorParameterAsSynthetic(mv, i);
186 continue;
187 }
188
189 String name;
190 boolean nullableType;
191 if (kind == JvmMethodParameterKind.VALUE) {
192 ValueParameterDescriptor descriptor = descriptors.next();
193 name = descriptor.getName().asString();
194 nullableType = descriptor.getType().isNullable();
195 }
196 else {
197 String lowercaseKind = kind.name().toLowerCase();
198 if (needIndexForVar(kind)) {
199 name = "$" + lowercaseKind + "$" + i;
200 }
201 else {
202 name = "$" + lowercaseKind;
203 }
204
205 if (kind == JvmMethodParameterKind.RECEIVER) {
206 ReceiverParameterDescriptor receiver = functionDescriptor.getReceiverParameter();
207 nullableType = receiver == null || receiver.getType().isNullable();
208 }
209 else {
210 nullableType = true;
211 }
212 }
213
214 AnnotationVisitor av =
215 mv.visitParameterAnnotation(i, asmDescByFqNameWithoutInnerClasses(OLD_JET_VALUE_PARAMETER_ANNOTATION), true);
216 if (av != null) {
217 av.visit("name", name);
218 if (nullableType) {
219 av.visit("type", "?");
220 }
221 av.visitEnd();
222 }
223 }
224 }
225
226 private void markEnumConstructorParameterAsSynthetic(MethodVisitor mv, int i) {
227 // IDEA's ClsPsi builder fails to annotate synthetic parameters
228 if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
229
230 // This is needed to avoid RuntimeInvisibleParameterAnnotations error in javac:
231 // see MethodWriter.visitParameterAnnotation()
232
233 AnnotationVisitor av = mv.visitParameterAnnotation(i, "Ljava/lang/Synthetic;", true);
234 if (av != null) {
235 av.visitEnd();
236 }
237 }
238
239 @Nullable
240 private Type getThisTypeForFunction(@NotNull FunctionDescriptor functionDescriptor, @NotNull MethodContext context) {
241 ReceiverParameterDescriptor expectedThisObject = functionDescriptor.getExpectedThisObject();
242 if (functionDescriptor instanceof ConstructorDescriptor) {
243 return typeMapper.mapType(functionDescriptor);
244 }
245 else if (expectedThisObject != null) {
246 return typeMapper.mapType(expectedThisObject.getType());
247 }
248 else if (isFunctionLiteral(functionDescriptor) || isLocalNamedFun(functionDescriptor)) {
249 return typeMapper.mapType(context.getThisDescriptor());
250 }
251 else {
252 return null;
253 }
254 }
255
256 private void generateMethodBody(
257 @NotNull MethodVisitor mv,
258 @NotNull FunctionDescriptor functionDescriptor,
259 @NotNull MethodContext context,
260 @NotNull JvmMethodSignature signature,
261 @NotNull FunctionGenerationStrategy strategy
262 ) {
263 mv.visitCode();
264
265 Label methodBegin = new Label();
266 mv.visitLabel(methodBegin);
267
268 if (context.getParentContext() instanceof PackageFacadeContext) {
269 generateStaticDelegateMethodBody(mv, signature.getAsmMethod(), (PackageFacadeContext) context.getParentContext());
270 }
271 else {
272 FrameMap frameMap = strategy.getFrameMap(typeMapper, context);
273
274 for (ValueParameterDescriptor parameter : functionDescriptor.getValueParameters()) {
275 frameMap.enter(parameter, typeMapper.mapType(parameter));
276 }
277
278 Label methodEntry = new Label();
279 mv.visitLabel(methodEntry);
280 context.setMethodStartLabel(methodEntry);
281
282 if (!JetTypeMapper.isAccessor(functionDescriptor)) {
283 genNotNullAssertionsForParameters(new InstructionAdapter(mv), state, functionDescriptor, frameMap);
284 }
285
286 strategy.generateBody(mv, signature, context, getParentCodegen());
287 }
288
289 Label methodEnd = new Label();
290 mv.visitLabel(methodEnd);
291
292
293 Type thisType = getThisTypeForFunction(functionDescriptor, context);
294 generateLocalVariableTable(mv, signature, functionDescriptor, thisType, methodBegin, methodEnd, context.getContextKind());
295 }
296
297 private static void generateLocalVariableTable(
298 @NotNull MethodVisitor mv,
299 @NotNull JvmMethodSignature jvmMethodSignature,
300 @NotNull FunctionDescriptor functionDescriptor,
301 @Nullable Type thisType,
302 @NotNull Label methodBegin,
303 @NotNull Label methodEnd,
304 @NotNull OwnerKind ownerKind
305 ) {
306 Iterator<ValueParameterDescriptor> valueParameters = functionDescriptor.getValueParameters().iterator();
307 List<JvmMethodParameterSignature> params = jvmMethodSignature.getValueParameters();
308 int shift = 0;
309
310 boolean isStatic = AsmUtil.isStaticMethod(ownerKind, functionDescriptor);
311 if (!isStatic) {
312 //add this
313 if (thisType != null) {
314 mv.visitLocalVariable("this", thisType.getDescriptor(), null, methodBegin, methodEnd, shift);
315 } else {
316 //TODO: provide thisType for callable reference
317 }
318 shift++;
319 }
320
321 for (int i = 0; i < params.size(); i++) {
322 JvmMethodParameterSignature param = params.get(i);
323 JvmMethodParameterKind kind = param.getKind();
324 String parameterName;
325
326 if (kind == JvmMethodParameterKind.VALUE) {
327 ValueParameterDescriptor parameter = valueParameters.next();
328 parameterName = parameter.getName().asString();
329 }
330 else {
331 String lowercaseKind = kind.name().toLowerCase();
332 parameterName = needIndexForVar(kind)
333 ? "$" + lowercaseKind + "$" + i
334 : "$" + lowercaseKind;
335 }
336
337 Type type = param.getAsmType();
338 mv.visitLocalVariable(parameterName, type.getDescriptor(), null, methodBegin, methodEnd, shift);
339 shift += type.getSize();
340 }
341 }
342
343 private static void generateStaticDelegateMethodBody(
344 @NotNull MethodVisitor mv,
345 @NotNull Method asmMethod,
346 @NotNull PackageFacadeContext context
347 ) {
348 InstructionAdapter iv = new InstructionAdapter(mv);
349 Type[] argTypes = asmMethod.getArgumentTypes();
350
351 // The first line of some package file is written to the line number attribute of a static delegate to allow to 'step into' it
352 // This is similar to what javac does with bridge methods
353 Label label = new Label();
354 iv.visitLabel(label);
355 iv.visitLineNumber(1, label);
356
357 int k = 0;
358 for (Type argType : argTypes) {
359 iv.load(k, argType);
360 k += argType.getSize();
361 }
362 iv.invokestatic(context.getDelegateToClassType().getInternalName(), asmMethod.getName(), asmMethod.getDescriptor());
363 iv.areturn(asmMethod.getReturnType());
364 }
365
366 private static boolean needIndexForVar(JvmMethodParameterKind kind) {
367 return kind == JvmMethodParameterKind.SHARED_VAR || kind == JvmMethodParameterKind.SUPER_CALL_PARAM;
368 }
369
370 public static void endVisit(MethodVisitor mv, @Nullable String description, @Nullable PsiElement method) {
371 try {
372 mv.visitMaxs(-1, -1);
373 }
374 catch (ProcessCanceledException e) {
375 throw e;
376 }
377 catch (Throwable t) {
378 String bytecode = renderByteCodeIfAvailable(mv);
379 throw new CompilationException(
380 "wrong code generated" +
381 (description != null ? " for " + description : "") +
382 t.getClass().getName() +
383 " " +
384 t.getMessage() +
385 (bytecode != null ? "\nbytecode:\n" + bytecode : ""),
386 t, method);
387 }
388 mv.visitEnd();
389 }
390
391 private static String renderByteCodeIfAvailable(MethodVisitor mv) {
392 String bytecode = null;
393 if (mv instanceof TraceMethodVisitor) {
394 TraceMethodVisitor traceMethodVisitor = (TraceMethodVisitor) mv;
395 StringWriter sw = new StringWriter();
396 PrintWriter pw = new PrintWriter(sw);
397 traceMethodVisitor.p.print(pw);
398 pw.close();
399 bytecode = sw.toString();
400 }
401 return bytecode;
402 }
403
404 static void generateBridgeIfNeeded(
405 CodegenContext owner,
406 GenerationState state,
407 ClassBuilder v,
408 FunctionDescriptor functionDescriptor
409 ) {
410 if (owner.getContextKind() == OwnerKind.TRAIT_IMPL) {
411 return;
412 }
413
414 Method method = state.getTypeMapper().mapSignature(functionDescriptor).getAsmMethod();
415
416 Queue<FunctionDescriptor> bfsQueue = new LinkedList<FunctionDescriptor>();
417 Set<FunctionDescriptor> visited = new HashSet<FunctionDescriptor>();
418
419 bfsQueue.offer(functionDescriptor.getOriginal());
420 visited.add(functionDescriptor.getOriginal());
421 for (FunctionDescriptor overriddenDescriptor : functionDescriptor.getOverriddenDescriptors()) {
422 FunctionDescriptor orig = overriddenDescriptor.getOriginal();
423 if (!visited.contains(orig)) {
424 bfsQueue.offer(overriddenDescriptor);
425 visited.add(overriddenDescriptor);
426 }
427 }
428
429 Set<Method> bridgesToGenerate = new HashSet<Method>();
430 while (!bfsQueue.isEmpty()) {
431 FunctionDescriptor descriptor = bfsQueue.poll();
432 if (descriptor.getKind() == CallableMemberDescriptor.Kind.DECLARATION) {
433 Method overridden = state.getTypeMapper().mapSignature(descriptor.getOriginal()).getAsmMethod();
434 if (differentMethods(method, overridden)) {
435 bridgesToGenerate.add(overridden);
436 }
437 continue;
438 }
439
440 for (FunctionDescriptor overriddenDescriptor : descriptor.getOverriddenDescriptors()) {
441 FunctionDescriptor orig = overriddenDescriptor.getOriginal();
442 if (!visited.contains(orig)) {
443 bfsQueue.offer(orig);
444 visited.add(orig);
445 }
446 }
447 }
448
449 for (Method overridden : bridgesToGenerate) {
450 generateBridge(state, v, functionDescriptor, overridden);
451 }
452 }
453
454 static void generateConstructorWithoutParametersIfNeeded(
455 @NotNull GenerationState state,
456 @NotNull CallableMethod method,
457 @NotNull ConstructorDescriptor constructorDescriptor,
458 @NotNull ClassBuilder classBuilder
459 ) {
460 if (!isDefaultConstructorNeeded(state.getBindingContext(), constructorDescriptor)) {
461 return;
462 }
463 int flags = getVisibilityAccessFlag(constructorDescriptor);
464 MethodVisitor mv = classBuilder.newMethod(null, flags, "<init>", "()V", null,
465 CodegenUtil.getExceptions(constructorDescriptor, state.getTypeMapper()));
466
467 if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
468
469 InstructionAdapter v = new InstructionAdapter(mv);
470 mv.visitCode();
471
472 Type methodOwner = method.getOwner();
473 v.load(0, methodOwner); // Load this on stack
474
475 int mask = 0;
476 for (ValueParameterDescriptor parameterDescriptor : constructorDescriptor.getValueParameters()) {
477 Type paramType = state.getTypeMapper().mapType(parameterDescriptor.getType());
478 pushDefaultValueOnStack(paramType, v);
479 mask |= (1 << parameterDescriptor.getIndex());
480 }
481 v.iconst(mask);
482 String desc = method.getAsmMethod().getDescriptor().replace(")", "I)");
483 v.invokespecial(methodOwner.getInternalName(), "<init>", desc);
484 v.areturn(Type.VOID_TYPE);
485 endVisit(mv, "default constructor for " + methodOwner.getInternalName(), null);
486 }
487
488 void generateDefaultIfNeeded(
489 @NotNull MethodContext owner,
490 @NotNull JvmMethodSignature signature,
491 @NotNull FunctionDescriptor functionDescriptor,
492 @NotNull OwnerKind kind,
493 @NotNull DefaultParameterValueLoader loadStrategy
494 ) {
495 DeclarationDescriptor contextClass = owner.getContextDescriptor().getContainingDeclaration();
496
497 if (kind != OwnerKind.TRAIT_IMPL &&
498 contextClass instanceof ClassDescriptor &&
499 ((ClassDescriptor) contextClass).getKind() == ClassKind.TRAIT) {
500 return;
501 }
502
503 if (!isDefaultNeeded(functionDescriptor)) {
504 return;
505 }
506
507 boolean isStatic = isStatic(kind);
508
509 Method jvmSignature = signature.getAsmMethod();
510
511 int flags = getVisibilityAccessFlag(functionDescriptor) | getDeprecatedAccessFlag(functionDescriptor);
512
513 Type ownerType;
514 if (contextClass instanceof PackageFragmentDescriptor) {
515 ownerType = state.getTypeMapper().getOwner(functionDescriptor, kind, true);
516 }
517 else if (contextClass instanceof ClassDescriptor) {
518 ownerType = state.getTypeMapper().mapClass((ClassDescriptor) contextClass);
519 }
520 else if (isLocalNamedFun(functionDescriptor)) {
521 ownerType = asmTypeForAnonymousClass(state.getBindingContext(), functionDescriptor);
522 }
523 else {
524 throw new IllegalStateException("Couldn't obtain owner name for " + functionDescriptor);
525 }
526
527 String descriptor = jvmSignature.getDescriptor().replace(")", "I)");
528 boolean isConstructor = "<init>".equals(jvmSignature.getName());
529 if (!isStatic && !isConstructor) {
530 descriptor = descriptor.replace("(", "(" + ownerType.getDescriptor());
531 }
532 MethodVisitor mv = v.newMethod(null, flags | (isConstructor ? 0 : ACC_STATIC),
533 isConstructor ? "<init>" : jvmSignature.getName() + JvmAbi.DEFAULT_PARAMS_IMPL_SUFFIX,
534 descriptor, null,
535 CodegenUtil.getExceptions(functionDescriptor, typeMapper));
536
537 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
538 generateDefaultImpl(owner, signature, functionDescriptor, isStatic, mv, loadStrategy);
539
540 }
541 }
542
543 private void generateDefaultImpl(
544 @NotNull MethodContext methodContext,
545 @NotNull JvmMethodSignature signature,
546 @NotNull FunctionDescriptor functionDescriptor,
547 boolean aStatic,
548 @NotNull MethodVisitor mv,
549 @NotNull DefaultParameterValueLoader loadStrategy
550 ) {
551 mv.visitCode();
552
553 FrameMap frameMap = new FrameMap();
554
555 if (!aStatic) {
556 frameMap.enterTemp(OBJECT_TYPE);
557 }
558
559 ExpressionCodegen codegen = new ExpressionCodegen(mv, frameMap, signature.getReturnType(), methodContext, state, getParentCodegen());
560
561 Type[] argTypes = signature.getAsmMethod().getArgumentTypes();
562 List<ValueParameterDescriptor> paramDescrs = functionDescriptor.getValueParameters();
563 Iterator<ValueParameterDescriptor> iterator = paramDescrs.iterator();
564
565 int countOfExtraVarsInMethodArgs = 0;
566
567 for (JvmMethodParameterSignature parameterSignature : signature.getValueParameters()) {
568 if (parameterSignature.getKind() != JvmMethodParameterKind.VALUE) {
569 countOfExtraVarsInMethodArgs++;
570 frameMap.enterTemp(parameterSignature.getAsmType());
571 }
572 else {
573 frameMap.enter(iterator.next(), parameterSignature.getAsmType());
574 }
575 }
576
577 int maskIndex = frameMap.enterTemp(Type.INT_TYPE);
578
579 InstructionAdapter iv = new InstructionAdapter(mv);
580 loadExplicitArgumentsOnStack(iv, OBJECT_TYPE, aStatic, signature);
581
582 for (int index = 0; index < paramDescrs.size(); index++) {
583 ValueParameterDescriptor parameterDescriptor = paramDescrs.get(index);
584
585 Type t = argTypes[countOfExtraVarsInMethodArgs + index];
586
587 if (parameterDescriptor.declaresDefaultValue()) {
588 iv.load(maskIndex, Type.INT_TYPE);
589 iv.iconst(1 << index);
590 iv.and(Type.INT_TYPE);
591 Label loadArg = new Label();
592 iv.ifeq(loadArg);
593
594 loadStrategy.putValueOnStack(parameterDescriptor, codegen);
595
596 int ind = frameMap.getIndex(parameterDescriptor);
597 iv.store(ind, t);
598
599 iv.mark(loadArg);
600 }
601
602 iv.load(frameMap.getIndex(parameterDescriptor), t);
603 }
604
605 CallableMethod method;
606 if (functionDescriptor instanceof ConstructorDescriptor) {
607 method = typeMapper.mapToCallableMethod((ConstructorDescriptor) functionDescriptor);
608 } else {
609 method = typeMapper.mapToCallableMethod(functionDescriptor, false, methodContext);
610 }
611
612 iv.visitMethodInsn(method.getInvokeOpcode(), method.getOwner().getInternalName(), method.getAsmMethod().getName(),
613 method.getAsmMethod().getDescriptor());
614
615 iv.areturn(signature.getReturnType());
616
617 endVisit(mv, "default method", callableDescriptorToDeclaration(state.getBindingContext(), functionDescriptor));
618 }
619
620
621 private static void loadExplicitArgumentsOnStack(
622 @NotNull InstructionAdapter iv,
623 @NotNull Type ownerType,
624 boolean isStatic,
625 @NotNull JvmMethodSignature signature
626 ) {
627 int var = 0;
628 if (!isStatic) {
629 iv.load(var, ownerType);
630 var += ownerType.getSize();
631 }
632
633 for (JvmMethodParameterSignature parameterSignature : signature.getValueParameters()) {
634 if (parameterSignature.getKind() != JvmMethodParameterKind.VALUE) {
635 Type type = parameterSignature.getAsmType();
636 iv.load(var, type);
637 var += type.getSize();
638 }
639 }
640 }
641
642 private static boolean isDefaultNeeded(FunctionDescriptor functionDescriptor) {
643 boolean needed = false;
644 if (functionDescriptor != null) {
645 for (ValueParameterDescriptor parameterDescriptor : functionDescriptor.getValueParameters()) {
646 if (parameterDescriptor.declaresDefaultValue()) {
647 needed = true;
648 break;
649 }
650 }
651 }
652 return needed;
653 }
654
655 private static boolean isDefaultConstructorNeeded(@NotNull BindingContext context, @NotNull ConstructorDescriptor constructorDescriptor) {
656 ClassDescriptor classDescriptor = constructorDescriptor.getContainingDeclaration();
657
658 if (CodegenBinding.canHaveOuter(context, classDescriptor)) return false;
659
660 if (classDescriptor.getVisibility() == Visibilities.PRIVATE ||
661 constructorDescriptor.getVisibility() == Visibilities.PRIVATE) return false;
662
663 if (constructorDescriptor.getValueParameters().isEmpty()) return false;
664
665 for (ValueParameterDescriptor parameterDescriptor : constructorDescriptor.getValueParameters()) {
666 if (!parameterDescriptor.declaresDefaultValue()) {
667 return false;
668 }
669 }
670 return true;
671 }
672
673 private static boolean differentMethods(Method method, Method overridden) {
674 if (!method.getReturnType().equals(overridden.getReturnType())) {
675 return true;
676 }
677 Type[] methodArgumentTypes = method.getArgumentTypes();
678 Type[] overriddenArgumentTypes = overridden.getArgumentTypes();
679 if (methodArgumentTypes.length != overriddenArgumentTypes.length) {
680 return true;
681 }
682 for (int i = 0; i != methodArgumentTypes.length; ++i) {
683 if (!methodArgumentTypes[i].equals(overriddenArgumentTypes[i])) {
684 return true;
685 }
686 }
687 return false;
688 }
689
690 private static void generateBridge(
691 GenerationState state,
692 ClassBuilder v,
693 FunctionDescriptor functionDescriptor,
694 Method overridden
695 ) {
696 Method jvmSignature = state.getTypeMapper().mapSignature(functionDescriptor).getAsmMethod();
697
698 int flags = ACC_PUBLIC | ACC_BRIDGE | ACC_SYNTHETIC; // TODO.
699
700 MethodVisitor mv = v.newMethod(null, flags, jvmSignature.getName(), overridden.getDescriptor(), null, null);
701 if (state.getClassBuilderMode() != ClassBuilderMode.FULL) return;
702
703 mv.visitCode();
704
705 Type[] argTypes = overridden.getArgumentTypes();
706 Type[] originalArgTypes = jvmSignature.getArgumentTypes();
707
708 InstructionAdapter iv = new InstructionAdapter(mv);
709 iv.load(0, OBJECT_TYPE);
710 for (int i = 0, reg = 1; i < argTypes.length; i++) {
711 StackValue.local(reg, argTypes[i]).put(originalArgTypes[i], iv);
712 //noinspection AssignmentToForLoopParameter
713 reg += argTypes[i].getSize();
714 }
715
716 iv.invokevirtual(v.getThisName(), jvmSignature.getName(), jvmSignature.getDescriptor());
717
718 StackValue.coerce(jvmSignature.getReturnType(), overridden.getReturnType(), iv);
719 iv.areturn(overridden.getReturnType());
720
721 endVisit(mv, "bridge method", callableDescriptorToDeclaration(state.getBindingContext(), functionDescriptor));
722 }
723
724 public void genDelegate(FunctionDescriptor functionDescriptor, FunctionDescriptor overriddenDescriptor, StackValue field) {
725 genDelegate(functionDescriptor, (ClassDescriptor) overriddenDescriptor.getContainingDeclaration(), field,
726 typeMapper.mapSignature(functionDescriptor),
727 typeMapper.mapSignature(overriddenDescriptor.getOriginal())
728 );
729 }
730
731 public void genDelegate(
732 FunctionDescriptor functionDescriptor,
733 ClassDescriptor toClass,
734 StackValue field,
735 JvmMethodSignature jvmDelegateMethodSignature,
736 JvmMethodSignature jvmOverriddenMethodSignature
737 ) {
738 Method overriddenMethod = jvmOverriddenMethodSignature.getAsmMethod();
739 Method delegateMethod = jvmDelegateMethodSignature.getAsmMethod();
740
741 int flags = ACC_PUBLIC;
742
743 MethodVisitor mv = v.newMethod(null, flags, delegateMethod.getName(), delegateMethod.getDescriptor(), null,
744 CodegenUtil.getExceptions(functionDescriptor, typeMapper));
745 if (state.getClassBuilderMode() != ClassBuilderMode.FULL) return;
746
747 mv.visitCode();
748
749 Type[] argTypes = delegateMethod.getArgumentTypes();
750 Type[] originalArgTypes = overriddenMethod.getArgumentTypes();
751
752 InstructionAdapter iv = new InstructionAdapter(mv);
753 iv.load(0, OBJECT_TYPE);
754 field.put(field.type, iv);
755 for (int i = 0, reg = 1; i < argTypes.length; i++) {
756 StackValue.local(reg, argTypes[i]).put(originalArgTypes[i], iv);
757 //noinspection AssignmentToForLoopParameter
758 reg += argTypes[i].getSize();
759 }
760
761 String internalName = typeMapper.mapType(toClass).getInternalName();
762 if (toClass.getKind() == ClassKind.TRAIT) {
763 iv.invokeinterface(internalName, overriddenMethod.getName(), overriddenMethod.getDescriptor());
764 }
765 else {
766 iv.invokevirtual(internalName, overriddenMethod.getName(), overriddenMethod.getDescriptor());
767 }
768
769 StackValue.onStack(overriddenMethod.getReturnType()).put(delegateMethod.getReturnType(), iv);
770
771 iv.areturn(delegateMethod.getReturnType());
772 endVisit(mv, "Delegate method " + functionDescriptor + " to " + jvmOverriddenMethodSignature,
773 descriptorToDeclaration(bindingContext, functionDescriptor.getContainingDeclaration()));
774
775 generateBridgeIfNeeded(owner, state, v, functionDescriptor);
776 }
777 }