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, state.getTypeMapper()),
134 new Label(),
135 new Label(),
136 methodContext.getContextKind()
137 );
138 return;
139 }
140
141 generateMethodBody(mv, functionDescriptor, methodContext, jvmSignature, strategy, getParentCodegen());
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 static Type getThisTypeForFunction(@NotNull FunctionDescriptor functionDescriptor, @NotNull MethodContext context, @NotNull JetTypeMapper typeMapper) {
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 public static void generateMethodBody(
257 @NotNull MethodVisitor mv,
258 @NotNull FunctionDescriptor functionDescriptor,
259 @NotNull MethodContext context,
260 @NotNull JvmMethodSignature signature,
261 @NotNull FunctionGenerationStrategy strategy,
262 @NotNull MemberCodegen parentCodegen
263 ) {
264 mv.visitCode();
265
266 Label methodBegin = new Label();
267 mv.visitLabel(methodBegin);
268
269 GenerationState state = parentCodegen.getState();
270 JetTypeMapper typeMapper = state.getTypeMapper();
271
272 if (context.getParentContext() instanceof PackageFacadeContext) {
273 generateStaticDelegateMethodBody(mv, signature.getAsmMethod(), (PackageFacadeContext) context.getParentContext());
274 }
275 else {
276 FrameMap frameMap = strategy.getFrameMap(typeMapper, context);
277
278 for (ValueParameterDescriptor parameter : functionDescriptor.getValueParameters()) {
279 frameMap.enter(parameter, typeMapper.mapType(parameter));
280 }
281
282 Label methodEntry = new Label();
283 mv.visitLabel(methodEntry);
284 context.setMethodStartLabel(methodEntry);
285
286 if (!JetTypeMapper.isAccessor(functionDescriptor)) {
287 genNotNullAssertionsForParameters(new InstructionAdapter(mv), state, functionDescriptor, frameMap);
288 }
289
290 strategy.generateBody(mv, signature, context, parentCodegen);
291 }
292
293 Label methodEnd = new Label();
294 mv.visitLabel(methodEnd);
295
296 Type thisType = getThisTypeForFunction(functionDescriptor, context, typeMapper);
297 generateLocalVariableTable(mv, signature, functionDescriptor, thisType, methodBegin, methodEnd, context.getContextKind());
298 }
299
300 private static void generateLocalVariableTable(
301 @NotNull MethodVisitor mv,
302 @NotNull JvmMethodSignature jvmMethodSignature,
303 @NotNull FunctionDescriptor functionDescriptor,
304 @Nullable Type thisType,
305 @NotNull Label methodBegin,
306 @NotNull Label methodEnd,
307 @NotNull OwnerKind ownerKind
308 ) {
309 Iterator<ValueParameterDescriptor> valueParameters = functionDescriptor.getValueParameters().iterator();
310 List<JvmMethodParameterSignature> params = jvmMethodSignature.getValueParameters();
311 int shift = 0;
312
313 boolean isStatic = AsmUtil.isStaticMethod(ownerKind, functionDescriptor);
314 if (!isStatic) {
315 //add this
316 if (thisType != null) {
317 mv.visitLocalVariable("this", thisType.getDescriptor(), null, methodBegin, methodEnd, shift);
318 } else {
319 //TODO: provide thisType for callable reference
320 }
321 shift++;
322 }
323
324 for (int i = 0; i < params.size(); i++) {
325 JvmMethodParameterSignature param = params.get(i);
326 JvmMethodParameterKind kind = param.getKind();
327 String parameterName;
328
329 if (kind == JvmMethodParameterKind.VALUE) {
330 ValueParameterDescriptor parameter = valueParameters.next();
331 parameterName = parameter.getName().asString();
332 }
333 else {
334 String lowercaseKind = kind.name().toLowerCase();
335 parameterName = needIndexForVar(kind)
336 ? "$" + lowercaseKind + "$" + i
337 : "$" + lowercaseKind;
338 }
339
340 Type type = param.getAsmType();
341 mv.visitLocalVariable(parameterName, type.getDescriptor(), null, methodBegin, methodEnd, shift);
342 shift += type.getSize();
343 }
344 }
345
346 private static void generateStaticDelegateMethodBody(
347 @NotNull MethodVisitor mv,
348 @NotNull Method asmMethod,
349 @NotNull PackageFacadeContext context
350 ) {
351 InstructionAdapter iv = new InstructionAdapter(mv);
352 Type[] argTypes = asmMethod.getArgumentTypes();
353
354 // The first line of some package file is written to the line number attribute of a static delegate to allow to 'step into' it
355 // This is similar to what javac does with bridge methods
356 Label label = new Label();
357 iv.visitLabel(label);
358 iv.visitLineNumber(1, label);
359
360 int k = 0;
361 for (Type argType : argTypes) {
362 iv.load(k, argType);
363 k += argType.getSize();
364 }
365 iv.invokestatic(context.getDelegateToClassType().getInternalName(), asmMethod.getName(), asmMethod.getDescriptor());
366 iv.areturn(asmMethod.getReturnType());
367 }
368
369 private static boolean needIndexForVar(JvmMethodParameterKind kind) {
370 return kind == JvmMethodParameterKind.SHARED_VAR || kind == JvmMethodParameterKind.SUPER_CALL_PARAM;
371 }
372
373 public static void endVisit(MethodVisitor mv, @Nullable String description, @Nullable PsiElement method) {
374 try {
375 mv.visitMaxs(-1, -1);
376 }
377 catch (ProcessCanceledException e) {
378 throw e;
379 }
380 catch (Throwable t) {
381 String bytecode = renderByteCodeIfAvailable(mv);
382 throw new CompilationException(
383 "wrong code generated" +
384 (description != null ? " for " + description : "") +
385 t.getClass().getName() +
386 " " +
387 t.getMessage() +
388 (bytecode != null ? "\nbytecode:\n" + bytecode : ""),
389 t, method);
390 }
391 mv.visitEnd();
392 }
393
394 private static String renderByteCodeIfAvailable(MethodVisitor mv) {
395 String bytecode = null;
396 if (mv instanceof TraceMethodVisitor) {
397 TraceMethodVisitor traceMethodVisitor = (TraceMethodVisitor) mv;
398 StringWriter sw = new StringWriter();
399 PrintWriter pw = new PrintWriter(sw);
400 traceMethodVisitor.p.print(pw);
401 pw.close();
402 bytecode = sw.toString();
403 }
404 return bytecode;
405 }
406
407 static void generateBridgeIfNeeded(
408 CodegenContext owner,
409 GenerationState state,
410 ClassBuilder v,
411 FunctionDescriptor functionDescriptor
412 ) {
413 if (owner.getContextKind() == OwnerKind.TRAIT_IMPL) {
414 return;
415 }
416
417 Method method = state.getTypeMapper().mapSignature(functionDescriptor).getAsmMethod();
418
419 Queue<FunctionDescriptor> bfsQueue = new LinkedList<FunctionDescriptor>();
420 Set<FunctionDescriptor> visited = new HashSet<FunctionDescriptor>();
421
422 bfsQueue.offer(functionDescriptor.getOriginal());
423 visited.add(functionDescriptor.getOriginal());
424 for (FunctionDescriptor overriddenDescriptor : functionDescriptor.getOverriddenDescriptors()) {
425 FunctionDescriptor orig = overriddenDescriptor.getOriginal();
426 if (!visited.contains(orig)) {
427 bfsQueue.offer(overriddenDescriptor);
428 visited.add(overriddenDescriptor);
429 }
430 }
431
432 Set<Method> bridgesToGenerate = new HashSet<Method>();
433 while (!bfsQueue.isEmpty()) {
434 FunctionDescriptor descriptor = bfsQueue.poll();
435 if (descriptor.getKind() == CallableMemberDescriptor.Kind.DECLARATION) {
436 Method overridden = state.getTypeMapper().mapSignature(descriptor.getOriginal()).getAsmMethod();
437 if (differentMethods(method, overridden)) {
438 bridgesToGenerate.add(overridden);
439 }
440 continue;
441 }
442
443 for (FunctionDescriptor overriddenDescriptor : descriptor.getOverriddenDescriptors()) {
444 FunctionDescriptor orig = overriddenDescriptor.getOriginal();
445 if (!visited.contains(orig)) {
446 bfsQueue.offer(orig);
447 visited.add(orig);
448 }
449 }
450 }
451
452 for (Method overridden : bridgesToGenerate) {
453 generateBridge(state, v, functionDescriptor, overridden);
454 }
455 }
456
457 static void generateConstructorWithoutParametersIfNeeded(
458 @NotNull GenerationState state,
459 @NotNull CallableMethod method,
460 @NotNull ConstructorDescriptor constructorDescriptor,
461 @NotNull ClassBuilder classBuilder
462 ) {
463 if (!isDefaultConstructorNeeded(state.getBindingContext(), constructorDescriptor)) {
464 return;
465 }
466 int flags = getVisibilityAccessFlag(constructorDescriptor);
467 MethodVisitor mv = classBuilder.newMethod(null, flags, "<init>", "()V", null,
468 CodegenUtil.getExceptions(constructorDescriptor, state.getTypeMapper()));
469
470 if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES) return;
471
472 InstructionAdapter v = new InstructionAdapter(mv);
473 mv.visitCode();
474
475 Type methodOwner = method.getOwner();
476 v.load(0, methodOwner); // Load this on stack
477
478 int mask = 0;
479 for (ValueParameterDescriptor parameterDescriptor : constructorDescriptor.getValueParameters()) {
480 Type paramType = state.getTypeMapper().mapType(parameterDescriptor.getType());
481 pushDefaultValueOnStack(paramType, v);
482 mask |= (1 << parameterDescriptor.getIndex());
483 }
484 v.iconst(mask);
485 String desc = method.getAsmMethod().getDescriptor().replace(")", "I)");
486 v.invokespecial(methodOwner.getInternalName(), "<init>", desc);
487 v.areturn(Type.VOID_TYPE);
488 endVisit(mv, "default constructor for " + methodOwner.getInternalName(), null);
489 }
490
491 void generateDefaultIfNeeded(
492 @NotNull MethodContext owner,
493 @NotNull JvmMethodSignature signature,
494 @NotNull FunctionDescriptor functionDescriptor,
495 @NotNull OwnerKind kind,
496 @NotNull DefaultParameterValueLoader loadStrategy
497 ) {
498 DeclarationDescriptor contextClass = owner.getContextDescriptor().getContainingDeclaration();
499
500 if (kind != OwnerKind.TRAIT_IMPL &&
501 contextClass instanceof ClassDescriptor &&
502 ((ClassDescriptor) contextClass).getKind() == ClassKind.TRAIT) {
503 return;
504 }
505
506 if (!isDefaultNeeded(functionDescriptor)) {
507 return;
508 }
509
510 boolean isStatic = isStatic(kind);
511
512 Method jvmSignature = signature.getAsmMethod();
513
514 int flags = getVisibilityAccessFlag(functionDescriptor) | getDeprecatedAccessFlag(functionDescriptor);
515
516 Type ownerType;
517 if (contextClass instanceof PackageFragmentDescriptor) {
518 ownerType = state.getTypeMapper().getOwner(functionDescriptor, kind, true);
519 }
520 else if (contextClass instanceof ClassDescriptor) {
521 ownerType = state.getTypeMapper().mapClass((ClassDescriptor) contextClass);
522 }
523 else if (isLocalNamedFun(functionDescriptor)) {
524 ownerType = asmTypeForAnonymousClass(state.getBindingContext(), functionDescriptor);
525 }
526 else {
527 throw new IllegalStateException("Couldn't obtain owner name for " + functionDescriptor);
528 }
529
530 String descriptor = jvmSignature.getDescriptor().replace(")", "I)");
531 boolean isConstructor = "<init>".equals(jvmSignature.getName());
532 if (!isStatic && !isConstructor) {
533 descriptor = descriptor.replace("(", "(" + ownerType.getDescriptor());
534 }
535 MethodVisitor mv = v.newMethod(null, flags | (isConstructor ? 0 : ACC_STATIC),
536 isConstructor ? "<init>" : jvmSignature.getName() + JvmAbi.DEFAULT_PARAMS_IMPL_SUFFIX,
537 descriptor, null,
538 CodegenUtil.getExceptions(functionDescriptor, typeMapper));
539
540 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
541 generateDefaultImpl(owner, signature, functionDescriptor, isStatic, mv, loadStrategy);
542
543 }
544 }
545
546 private void generateDefaultImpl(
547 @NotNull MethodContext methodContext,
548 @NotNull JvmMethodSignature signature,
549 @NotNull FunctionDescriptor functionDescriptor,
550 boolean aStatic,
551 @NotNull MethodVisitor mv,
552 @NotNull DefaultParameterValueLoader loadStrategy
553 ) {
554 mv.visitCode();
555
556 FrameMap frameMap = new FrameMap();
557
558 if (!aStatic) {
559 frameMap.enterTemp(OBJECT_TYPE);
560 }
561
562 ExpressionCodegen codegen = new ExpressionCodegen(mv, frameMap, signature.getReturnType(), methodContext, state, getParentCodegen());
563
564 Type[] argTypes = signature.getAsmMethod().getArgumentTypes();
565 List<ValueParameterDescriptor> paramDescrs = functionDescriptor.getValueParameters();
566 Iterator<ValueParameterDescriptor> iterator = paramDescrs.iterator();
567
568 int countOfExtraVarsInMethodArgs = 0;
569
570 for (JvmMethodParameterSignature parameterSignature : signature.getValueParameters()) {
571 if (parameterSignature.getKind() != JvmMethodParameterKind.VALUE) {
572 countOfExtraVarsInMethodArgs++;
573 frameMap.enterTemp(parameterSignature.getAsmType());
574 }
575 else {
576 frameMap.enter(iterator.next(), parameterSignature.getAsmType());
577 }
578 }
579
580 int maskIndex = frameMap.enterTemp(Type.INT_TYPE);
581
582 InstructionAdapter iv = new InstructionAdapter(mv);
583 loadExplicitArgumentsOnStack(iv, OBJECT_TYPE, aStatic, signature);
584
585 for (int index = 0; index < paramDescrs.size(); index++) {
586 ValueParameterDescriptor parameterDescriptor = paramDescrs.get(index);
587
588 Type t = argTypes[countOfExtraVarsInMethodArgs + index];
589
590 if (parameterDescriptor.declaresDefaultValue()) {
591 iv.load(maskIndex, Type.INT_TYPE);
592 iv.iconst(1 << index);
593 iv.and(Type.INT_TYPE);
594 Label loadArg = new Label();
595 iv.ifeq(loadArg);
596
597 loadStrategy.putValueOnStack(parameterDescriptor, codegen);
598
599 int ind = frameMap.getIndex(parameterDescriptor);
600 iv.store(ind, t);
601
602 iv.mark(loadArg);
603 }
604
605 iv.load(frameMap.getIndex(parameterDescriptor), t);
606 }
607
608 CallableMethod method;
609 if (functionDescriptor instanceof ConstructorDescriptor) {
610 method = typeMapper.mapToCallableMethod((ConstructorDescriptor) functionDescriptor);
611 } else {
612 method = typeMapper.mapToCallableMethod(functionDescriptor, false, methodContext);
613 }
614
615 iv.visitMethodInsn(method.getInvokeOpcode(), method.getOwner().getInternalName(), method.getAsmMethod().getName(),
616 method.getAsmMethod().getDescriptor());
617
618 iv.areturn(signature.getReturnType());
619
620 endVisit(mv, "default method", callableDescriptorToDeclaration(state.getBindingContext(), functionDescriptor));
621 }
622
623
624 private static void loadExplicitArgumentsOnStack(
625 @NotNull InstructionAdapter iv,
626 @NotNull Type ownerType,
627 boolean isStatic,
628 @NotNull JvmMethodSignature signature
629 ) {
630 int var = 0;
631 if (!isStatic) {
632 iv.load(var, ownerType);
633 var += ownerType.getSize();
634 }
635
636 for (JvmMethodParameterSignature parameterSignature : signature.getValueParameters()) {
637 if (parameterSignature.getKind() != JvmMethodParameterKind.VALUE) {
638 Type type = parameterSignature.getAsmType();
639 iv.load(var, type);
640 var += type.getSize();
641 }
642 }
643 }
644
645 private static boolean isDefaultNeeded(FunctionDescriptor functionDescriptor) {
646 boolean needed = false;
647 if (functionDescriptor != null) {
648 for (ValueParameterDescriptor parameterDescriptor : functionDescriptor.getValueParameters()) {
649 if (parameterDescriptor.declaresDefaultValue()) {
650 needed = true;
651 break;
652 }
653 }
654 }
655 return needed;
656 }
657
658 private static boolean isDefaultConstructorNeeded(@NotNull BindingContext context, @NotNull ConstructorDescriptor constructorDescriptor) {
659 ClassDescriptor classDescriptor = constructorDescriptor.getContainingDeclaration();
660
661 if (CodegenBinding.canHaveOuter(context, classDescriptor)) return false;
662
663 if (classDescriptor.getVisibility() == Visibilities.PRIVATE ||
664 constructorDescriptor.getVisibility() == Visibilities.PRIVATE) return false;
665
666 if (constructorDescriptor.getValueParameters().isEmpty()) return false;
667
668 for (ValueParameterDescriptor parameterDescriptor : constructorDescriptor.getValueParameters()) {
669 if (!parameterDescriptor.declaresDefaultValue()) {
670 return false;
671 }
672 }
673 return true;
674 }
675
676 private static boolean differentMethods(Method method, Method overridden) {
677 if (!method.getReturnType().equals(overridden.getReturnType())) {
678 return true;
679 }
680 Type[] methodArgumentTypes = method.getArgumentTypes();
681 Type[] overriddenArgumentTypes = overridden.getArgumentTypes();
682 if (methodArgumentTypes.length != overriddenArgumentTypes.length) {
683 return true;
684 }
685 for (int i = 0; i != methodArgumentTypes.length; ++i) {
686 if (!methodArgumentTypes[i].equals(overriddenArgumentTypes[i])) {
687 return true;
688 }
689 }
690 return false;
691 }
692
693 private static void generateBridge(
694 GenerationState state,
695 ClassBuilder v,
696 FunctionDescriptor functionDescriptor,
697 Method overridden
698 ) {
699 Method jvmSignature = state.getTypeMapper().mapSignature(functionDescriptor).getAsmMethod();
700
701 int flags = ACC_PUBLIC | ACC_BRIDGE | ACC_SYNTHETIC; // TODO.
702
703 MethodVisitor mv = v.newMethod(null, flags, jvmSignature.getName(), overridden.getDescriptor(), null, null);
704 if (state.getClassBuilderMode() != ClassBuilderMode.FULL) return;
705
706 mv.visitCode();
707
708 Type[] argTypes = overridden.getArgumentTypes();
709 Type[] originalArgTypes = jvmSignature.getArgumentTypes();
710
711 InstructionAdapter iv = new InstructionAdapter(mv);
712 iv.load(0, OBJECT_TYPE);
713 for (int i = 0, reg = 1; i < argTypes.length; i++) {
714 StackValue.local(reg, argTypes[i]).put(originalArgTypes[i], iv);
715 //noinspection AssignmentToForLoopParameter
716 reg += argTypes[i].getSize();
717 }
718
719 iv.invokevirtual(v.getThisName(), jvmSignature.getName(), jvmSignature.getDescriptor());
720
721 StackValue.coerce(jvmSignature.getReturnType(), overridden.getReturnType(), iv);
722 iv.areturn(overridden.getReturnType());
723
724 endVisit(mv, "bridge method", callableDescriptorToDeclaration(state.getBindingContext(), functionDescriptor));
725 }
726
727 public void genDelegate(FunctionDescriptor functionDescriptor, FunctionDescriptor overriddenDescriptor, StackValue field) {
728 genDelegate(functionDescriptor, (ClassDescriptor) overriddenDescriptor.getContainingDeclaration(), field,
729 typeMapper.mapSignature(functionDescriptor),
730 typeMapper.mapSignature(overriddenDescriptor.getOriginal())
731 );
732 }
733
734 public void genDelegate(
735 FunctionDescriptor functionDescriptor,
736 ClassDescriptor toClass,
737 StackValue field,
738 JvmMethodSignature jvmDelegateMethodSignature,
739 JvmMethodSignature jvmOverriddenMethodSignature
740 ) {
741 Method overriddenMethod = jvmOverriddenMethodSignature.getAsmMethod();
742 Method delegateMethod = jvmDelegateMethodSignature.getAsmMethod();
743
744 int flags = ACC_PUBLIC;
745
746 MethodVisitor mv = v.newMethod(null, flags, delegateMethod.getName(), delegateMethod.getDescriptor(), null,
747 CodegenUtil.getExceptions(functionDescriptor, typeMapper));
748 if (state.getClassBuilderMode() != ClassBuilderMode.FULL) return;
749
750 mv.visitCode();
751
752 Type[] argTypes = delegateMethod.getArgumentTypes();
753 Type[] originalArgTypes = overriddenMethod.getArgumentTypes();
754
755 InstructionAdapter iv = new InstructionAdapter(mv);
756 iv.load(0, OBJECT_TYPE);
757 field.put(field.type, iv);
758 for (int i = 0, reg = 1; i < argTypes.length; i++) {
759 StackValue.local(reg, argTypes[i]).put(originalArgTypes[i], iv);
760 //noinspection AssignmentToForLoopParameter
761 reg += argTypes[i].getSize();
762 }
763
764 String internalName = typeMapper.mapType(toClass).getInternalName();
765 if (toClass.getKind() == ClassKind.TRAIT) {
766 iv.invokeinterface(internalName, overriddenMethod.getName(), overriddenMethod.getDescriptor());
767 }
768 else {
769 iv.invokevirtual(internalName, overriddenMethod.getName(), overriddenMethod.getDescriptor());
770 }
771
772 StackValue.onStack(overriddenMethod.getReturnType()).put(delegateMethod.getReturnType(), iv);
773
774 iv.areturn(delegateMethod.getReturnType());
775 endVisit(mv, "Delegate method " + functionDescriptor + " to " + jvmOverriddenMethodSignature,
776 descriptorToDeclaration(bindingContext, functionDescriptor.getContainingDeclaration()));
777
778 generateBridgeIfNeeded(owner, state, v, functionDescriptor);
779 }
780 }