001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.codegen.inline;
018
019 import com.google.common.collect.Lists;
020 import com.intellij.util.ArrayUtil;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.annotations.Nullable;
023 import org.jetbrains.kotlin.codegen.ClosureCodegen;
024 import org.jetbrains.kotlin.codegen.StackValue;
025 import org.jetbrains.kotlin.codegen.intrinsics.IntrinsicMethods;
026 import org.jetbrains.kotlin.codegen.optimization.MandatoryMethodTransformer;
027 import org.jetbrains.kotlin.codegen.state.JetTypeMapper;
028 import org.jetbrains.org.objectweb.asm.Label;
029 import org.jetbrains.org.objectweb.asm.MethodVisitor;
030 import org.jetbrains.org.objectweb.asm.Opcodes;
031 import org.jetbrains.org.objectweb.asm.Type;
032 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
033 import org.jetbrains.org.objectweb.asm.commons.Method;
034 import org.jetbrains.org.objectweb.asm.commons.RemappingMethodAdapter;
035 import org.jetbrains.org.objectweb.asm.tree.*;
036 import org.jetbrains.org.objectweb.asm.tree.analysis.*;
037
038 import java.util.*;
039
040 import static org.jetbrains.kotlin.codegen.inline.InlineCodegenUtil.*;
041
042 public class MethodInliner {
043
044 private final MethodNode node;
045
046 private final Parameters parameters;
047
048 private final InliningContext inliningContext;
049
050 private final FieldRemapper nodeRemapper;
051
052 private final boolean isSameModule;
053
054 private final String errorPrefix;
055
056 private final SourceMapper sourceMapper;
057
058 private final JetTypeMapper typeMapper;
059
060 private final List<InvokeCall> invokeCalls = new ArrayList<InvokeCall>();
061
062 //keeps order
063 private final List<AnonymousObjectGeneration> anonymousObjectGenerations = new ArrayList<AnonymousObjectGeneration>();
064 //current state
065 private final Map<String, String> currentTypeMapping = new HashMap<String, String>();
066
067 private final InlineResult result;
068
069 private int lambdasFinallyBlocks;
070
071 /*
072 *
073 * @param node
074 * @param parameters
075 * @param inliningContext
076 * @param lambdaType - in case on lambda 'invoke' inlining
077 */
078 public MethodInliner(
079 @NotNull MethodNode node,
080 @NotNull Parameters parameters,
081 @NotNull InliningContext parent,
082 @NotNull FieldRemapper nodeRemapper,
083 boolean isSameModule,
084 @NotNull String errorPrefix,
085 @NotNull SourceMapper sourceMapper
086 ) {
087 this.node = node;
088 this.parameters = parameters;
089 this.inliningContext = parent;
090 this.nodeRemapper = nodeRemapper;
091 this.isSameModule = isSameModule;
092 this.errorPrefix = errorPrefix;
093 this.sourceMapper = sourceMapper;
094 this.typeMapper = parent.state.getTypeMapper();
095 this.result = InlineResult.create();
096 }
097
098 public InlineResult doInline(
099 @NotNull MethodVisitor adapter,
100 @NotNull LocalVarRemapper remapper,
101 boolean remapReturn,
102 @NotNull LabelOwner labelOwner
103 ) {
104 return doInline(adapter, remapper, remapReturn, labelOwner, 0);
105 }
106
107 private InlineResult doInline(
108 @NotNull MethodVisitor adapter,
109 @NotNull LocalVarRemapper remapper,
110 boolean remapReturn,
111 @NotNull LabelOwner labelOwner,
112 int finallyDeepShift
113 ) {
114 //analyze body
115 MethodNode transformedNode = markPlacesForInlineAndRemoveInlinable(node, finallyDeepShift);
116
117 //substitute returns with "goto end" instruction to keep non local returns in lambdas
118 Label end = new Label();
119 transformedNode = doInline(transformedNode);
120 removeClosureAssertions(transformedNode);
121 InsnList instructions = transformedNode.instructions;
122 instructions.resetLabels();
123
124 MethodNode resultNode = new MethodNode(InlineCodegenUtil.API, transformedNode.access, transformedNode.name, transformedNode.desc,
125 transformedNode.signature, ArrayUtil.toStringArray(transformedNode.exceptions));
126 RemapVisitor visitor = new RemapVisitor(resultNode, remapper, nodeRemapper);
127 try {
128 transformedNode.accept(visitor);
129 }
130 catch (Exception e) {
131 throw wrapException(e, transformedNode, "couldn't inline method call");
132 }
133
134 resultNode.visitLabel(end);
135
136 if (inliningContext.isRoot()) {
137 InternalFinallyBlockInliner.processInlineFunFinallyBlocks(resultNode, lambdasFinallyBlocks, ((StackValue.Local)remapper.remap(parameters.getArgsSizeOnStack() + 1).value).index);
138 }
139
140 processReturns(resultNode, labelOwner, remapReturn, end);
141 //flush transformed node to output
142 resultNode.accept(new InliningInstructionAdapter(adapter));
143
144 sourceMapper.endMapping();
145 return result;
146 }
147
148 private MethodNode doInline(MethodNode node) {
149
150 final Deque<InvokeCall> currentInvokes = new LinkedList<InvokeCall>(invokeCalls);
151
152 final MethodNode resultNode = new MethodNode(node.access, node.name, node.desc, node.signature, null);
153
154 final Iterator<AnonymousObjectGeneration> iterator = anonymousObjectGenerations.iterator();
155
156 RemappingMethodAdapter remappingMethodAdapter = new RemappingMethodAdapter(resultNode.access, resultNode.desc, resultNode,
157 new TypeRemapper(currentTypeMapping));
158
159 final int markerShift = InlineCodegenUtil.calcMarkerShift(parameters, node);
160 InlineAdapter lambdaInliner = new InlineAdapter(remappingMethodAdapter, parameters.getArgsSizeOnStack(), sourceMapper) {
161
162 private AnonymousObjectGeneration anonymousObjectGen;
163 private void handleAnonymousObjectGeneration() {
164 anonymousObjectGen = iterator.next();
165
166 if (anonymousObjectGen.shouldRegenerate()) {
167 //TODO: need poping of type but what to do with local funs???
168 String oldClassName = anonymousObjectGen.getOwnerInternalName();
169 String newClassName = inliningContext.nameGenerator.genLambdaClassName();
170 currentTypeMapping.put(oldClassName, newClassName);
171 AnonymousObjectTransformer transformer =
172 new AnonymousObjectTransformer(oldClassName,
173 inliningContext
174 .subInlineWithClassRegeneration(
175 inliningContext.nameGenerator,
176 currentTypeMapping,
177 anonymousObjectGen),
178 isSameModule, Type.getObjectType(newClassName)
179 );
180
181 InlineResult transformResult = transformer.doTransform(anonymousObjectGen, nodeRemapper);
182 result.addAllClassesToRemove(transformResult);
183 result.addChangedType(oldClassName, newClassName);
184
185 if (inliningContext.isInliningLambda && !anonymousObjectGen.isStaticOrigin()) {
186 // this class is transformed and original not used so we should remove original one after inlining
187 // Note: It is unsafe to remove anonymous class that is referenced by GETSTATIC within lambda
188 // because it can be local function from outer scope
189 result.addClassToRemove(oldClassName);
190 }
191
192 if (transformResult.getReifiedTypeParametersUsages().wereUsedReifiedParameters()) {
193 ReifiedTypeInliner.putNeedClassReificationMarker(mv);
194 result.getReifiedTypeParametersUsages().mergeAll(transformResult.getReifiedTypeParametersUsages());
195 }
196 }
197 }
198
199 @Override
200 public void anew(@NotNull Type type) {
201 if (isAnonymousConstructorCall(type.getInternalName(), "<init>")) {
202 handleAnonymousObjectGeneration();
203 }
204
205 //in case of regenerated anonymousObjectGen type would be remapped to new one via remappingMethodAdapter
206 super.anew(type);
207 }
208
209 @Override
210 public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) {
211 if (/*INLINE_RUNTIME.equals(owner) &&*/ isInvokeOnLambda(owner, name)) { //TODO add method
212 assert !currentInvokes.isEmpty();
213 InvokeCall invokeCall = currentInvokes.remove();
214 LambdaInfo info = invokeCall.lambdaInfo;
215
216 if (info == null) {
217 //noninlinable lambda
218 super.visitMethodInsn(opcode, owner, name, desc, itf);
219 return;
220 }
221
222 int valueParamShift = Math.max(getNextLocalIndex(), markerShift);//NB: don't inline cause it changes
223 putStackValuesIntoLocals(info.getInvokeParamsWithoutCaptured(), valueParamShift, this, desc);
224
225 addInlineMarker(this, true);
226 Parameters lambdaParameters = info.addAllParameters(nodeRemapper);
227
228 InlinedLambdaRemapper newCapturedRemapper =
229 new InlinedLambdaRemapper(info.getLambdaClassType().getInternalName(), nodeRemapper, lambdaParameters);
230
231 setLambdaInlining(true);
232 SMAP lambdaSMAP = info.getNode().getClassSMAP();
233 SourceMapper mapper =
234 inliningContext.classRegeneration && !inliningContext.isInliningLambda ?
235 new NestedSourceMapper(sourceMapper, lambdaSMAP.getIntervals(), lambdaSMAP.getSourceInfo())
236 : new InlineLambdaSourceMapper(sourceMapper.getParent(), info.getNode());
237 MethodInliner inliner = new MethodInliner(info.getNode().getNode(), lambdaParameters,
238 inliningContext.subInlineLambda(info),
239 newCapturedRemapper, true /*cause all calls in same module as lambda*/,
240 "Lambda inlining " + info.getLambdaClassType().getInternalName(),
241 mapper);
242
243 LocalVarRemapper remapper = new LocalVarRemapper(lambdaParameters, valueParamShift);
244 InlineResult lambdaResult = inliner.doInline(this.mv, remapper, true, info, invokeCall.finallyDepthShift);//TODO add skipped this and receiver
245 result.addAllClassesToRemove(lambdaResult);
246
247 //return value boxing/unboxing
248 Method bridge =
249 typeMapper.mapSignature(ClosureCodegen.getErasedInvokeFunction(info.getFunctionDescriptor())).getAsmMethod();
250 Method delegate = typeMapper.mapSignature(info.getFunctionDescriptor()).getAsmMethod();
251 StackValue.onStack(delegate.getReturnType()).put(bridge.getReturnType(), this);
252 setLambdaInlining(false);
253 addInlineMarker(this, false);
254 mapper.endMapping();
255 }
256 else if (isAnonymousConstructorCall(owner, name)) { //TODO add method
257 assert anonymousObjectGen != null : "<init> call not corresponds to new call" + owner + " " + name;
258 if (anonymousObjectGen.shouldRegenerate()) {
259 //put additional captured parameters on stack
260 for (CapturedParamDesc capturedParamDesc : anonymousObjectGen.getAllRecapturedParameters()) {
261 visitFieldInsn(Opcodes.GETSTATIC, capturedParamDesc.getContainingLambdaName(),
262 "$$$" + capturedParamDesc.getFieldName(), capturedParamDesc.getType().getDescriptor());
263 }
264 super.visitMethodInsn(opcode, anonymousObjectGen.getNewLambdaType().getInternalName(), name, anonymousObjectGen.getNewConstructorDescriptor(), itf);
265 anonymousObjectGen = null;
266 } else {
267 super.visitMethodInsn(opcode, changeOwnerForExternalPackage(owner, opcode), name, desc, itf);
268 }
269 }
270 else if (ReifiedTypeInliner.isNeedClassReificationMarker(new MethodInsnNode(opcode, owner, name, desc, false))) {
271 // we will put it if needed in anew processing
272 }
273 else {
274 super.visitMethodInsn(opcode, changeOwnerForExternalPackage(owner, opcode), name, desc, itf);
275 }
276 }
277
278 @Override
279 public void visitFieldInsn(int opcode, @NotNull String owner, @NotNull String name, @NotNull String desc) {
280 if (opcode == Opcodes.GETSTATIC && isAnonymousSingletonLoad(owner, name)) {
281 handleAnonymousObjectGeneration();
282 }
283 super.visitFieldInsn(opcode, owner, name, desc);
284 }
285
286 @Override
287 public void visitMaxs(int stack, int locals) {
288 lambdasFinallyBlocks = resultNode.tryCatchBlocks.size();
289 super.visitMaxs(stack, locals);
290 }
291
292 };
293
294 node.accept(lambdaInliner);
295
296 return resultNode;
297 }
298
299 @NotNull
300 public static CapturedParamInfo findCapturedField(FieldInsnNode node, FieldRemapper fieldRemapper) {
301 assert node.name.startsWith("$$$") : "Captured field template should start with $$$ prefix";
302 FieldInsnNode fin = new FieldInsnNode(node.getOpcode(), node.owner, node.name.substring(3), node.desc);
303 CapturedParamInfo field = fieldRemapper.findField(fin);
304 if (field == null) {
305 throw new IllegalStateException("Couldn't find captured field " + node.owner + "." + node.name + " in " + fieldRemapper.getLambdaInternalName());
306 }
307 return field;
308 }
309
310 @NotNull
311 public MethodNode prepareNode(@NotNull MethodNode node, int finallyDeepShift) {
312 final int capturedParamsSize = parameters.getCapturedArgsSizeOnStack();
313 final int realParametersSize = parameters.getRealArgsSizeOnStack();
314 Type[] types = Type.getArgumentTypes(node.desc);
315 Type returnType = Type.getReturnType(node.desc);
316
317 List<Type> capturedTypes = parameters.getCapturedTypes();
318 Type[] allTypes = ArrayUtil.mergeArrays(types, capturedTypes.toArray(new Type[capturedTypes.size()]));
319
320 node.instructions.resetLabels();
321 MethodNode transformedNode = new MethodNode(InlineCodegenUtil.API, node.access, node.name, Type.getMethodDescriptor(returnType, allTypes), node.signature, null) {
322
323 private final boolean isInliningLambda = nodeRemapper.isInsideInliningLambda();
324
325 private int getNewIndex(int var) {
326 return var + (var < realParametersSize ? 0 : capturedParamsSize);
327 }
328
329 @Override
330 public void visitVarInsn(int opcode, int var) {
331 super.visitVarInsn(opcode, getNewIndex(var));
332 }
333
334 @Override
335 public void visitIincInsn(int var, int increment) {
336 super.visitIincInsn(getNewIndex(var), increment);
337 }
338
339 @Override
340 public void visitMaxs(int maxStack, int maxLocals) {
341 super.visitMaxs(maxStack, maxLocals + capturedParamsSize);
342 }
343
344 @Override
345 public void visitLineNumber(int line, @NotNull Label start) {
346 if(isInliningLambda || InlineCodegenUtil.GENERATE_SMAP) {
347 super.visitLineNumber(line, start);
348 }
349 }
350
351 @Override
352 public void visitLocalVariable(
353 @NotNull String name, @NotNull String desc, String signature, @NotNull Label start, @NotNull Label end, int index
354 ) {
355 if (isInliningLambda || InlineCodegenUtil.GENERATE_SMAP) {
356 super.visitLocalVariable(name, desc, signature, start, end, getNewIndex(index));
357 }
358 }
359 };
360
361 node.accept(transformedNode);
362
363 transformCaptured(transformedNode);
364 transformFinallyDeepIndex(transformedNode, finallyDeepShift);
365
366 return transformedNode;
367 }
368
369 @NotNull
370 protected MethodNode markPlacesForInlineAndRemoveInlinable(@NotNull MethodNode node, int finallyDeepShift) {
371 node = prepareNode(node, finallyDeepShift);
372
373 try {
374 new MandatoryMethodTransformer().transform("fake", node);
375 }
376 catch (Throwable e) {
377 throw wrapException(e, node, "couldn't inline method call");
378 }
379
380 Analyzer<SourceValue> analyzer = new Analyzer<SourceValue>(new SourceInterpreter()) {
381 @NotNull
382 @Override
383 protected Frame<SourceValue> newFrame(
384 int nLocals, int nStack
385 ) {
386 return new Frame<SourceValue>(nLocals, nStack) {
387 @Override
388 public void execute(
389 @NotNull AbstractInsnNode insn, Interpreter<SourceValue> interpreter
390 ) throws AnalyzerException {
391 if (insn.getOpcode() == Opcodes.RETURN) {
392 //there is exception on void non local return in frame
393 return;
394 }
395 super.execute(insn, interpreter);
396 }
397 };
398 }
399 };
400
401 Frame<SourceValue>[] sources;
402 try {
403 sources = analyzer.analyze("fake", node);
404 }
405 catch (AnalyzerException e) {
406 throw wrapException(e, node, "couldn't inline method call");
407 }
408
409 AbstractInsnNode cur = node.instructions.getFirst();
410 int index = 0;
411
412 boolean awaitClassReification = false;
413 int currentFinallyDeep = 0;
414
415 while (cur != null) {
416 Frame<SourceValue> frame = sources[index];
417
418 if (frame != null) {
419 if (ReifiedTypeInliner.isNeedClassReificationMarker(cur)) {
420 awaitClassReification = true;
421 }
422 else if (cur.getType() == AbstractInsnNode.METHOD_INSN) {
423 if (InlineCodegenUtil.isFinallyStart(cur)) {
424 //TODO deep index calc could be more precise
425 currentFinallyDeep = InlineCodegenUtil.getConstant(cur.getPrevious());
426 }
427
428 MethodInsnNode methodInsnNode = (MethodInsnNode) cur;
429 String owner = methodInsnNode.owner;
430 String desc = methodInsnNode.desc;
431 String name = methodInsnNode.name;
432 //TODO check closure
433 Type[] argTypes = Type.getArgumentTypes(desc);
434 int paramCount = argTypes.length + 1;//non static
435 int firstParameterIndex = frame.getStackSize() - paramCount;
436 if (isInvokeOnLambda(owner, name) /*&& methodInsnNode.owner.equals(INLINE_RUNTIME)*/) {
437 SourceValue sourceValue = frame.getStack(firstParameterIndex);
438
439 LambdaInfo lambdaInfo = null;
440 int varIndex = -1;
441
442 if (sourceValue.insns.size() == 1) {
443 AbstractInsnNode insnNode = sourceValue.insns.iterator().next();
444 AbstractInsnNode processingInstruction = insnNode;
445
446 if (insnNode.getOpcode() == Opcodes.SWAP) {
447 processingInstruction = InlineCodegenUtil.getPrevMeaningful(insnNode);
448 }
449 lambdaInfo = getLambdaIfExists(processingInstruction);
450 if (lambdaInfo != null) {
451 //remove inlinable access
452 assert processingInstruction != null;
453 InlineCodegenUtil.removeInterval(node, processingInstruction, insnNode);
454 }
455 }
456
457 invokeCalls.add(new InvokeCall(varIndex, lambdaInfo, currentFinallyDeep));
458 }
459 else if (isAnonymousConstructorCall(owner, name)) {
460 Map<Integer, LambdaInfo> lambdaMapping = new HashMap<Integer, LambdaInfo>();
461
462 int offset = 0;
463 for (int i = 0; i < paramCount; i++) {
464 SourceValue sourceValue = frame.getStack(firstParameterIndex + i);
465 if (sourceValue.insns.size() == 1) {
466 AbstractInsnNode insnNode = sourceValue.insns.iterator().next();
467 LambdaInfo lambdaInfo = getLambdaIfExists(insnNode);
468 if (lambdaInfo != null) {
469 lambdaMapping.put(offset, lambdaInfo);
470 node.instructions.remove(insnNode);
471 }
472 }
473 offset += i == 0 ? 1 : argTypes[i - 1].getSize();
474 }
475
476 anonymousObjectGenerations.add(
477 buildConstructorInvocation(
478 owner, desc, lambdaMapping, awaitClassReification
479 )
480 );
481 awaitClassReification = false;
482 }
483 }
484 else if (cur.getOpcode() == Opcodes.GETSTATIC) {
485 FieldInsnNode fieldInsnNode = (FieldInsnNode) cur;
486 String owner = fieldInsnNode.owner;
487 if (isAnonymousSingletonLoad(owner, fieldInsnNode.name)) {
488 anonymousObjectGenerations.add(
489 new AnonymousObjectGeneration(
490 owner, isSameModule, awaitClassReification, isAlreadyRegenerated(owner), true
491 )
492 );
493 awaitClassReification = false;
494 }
495 }
496 }
497 AbstractInsnNode prevNode = cur;
498 cur = cur.getNext();
499 index++;
500
501 //given frame is <tt>null</tt> if and only if the corresponding instruction cannot be reached (dead code).
502 if (frame == null) {
503 //clean dead code otherwise there is problems in unreachable finally block, don't touch label it cause try/catch/finally problems
504 if (prevNode.getType() == AbstractInsnNode.LABEL) {
505 //NB: Cause we generate exception table for default handler using gaps (see ExpressionCodegen.visitTryExpression)
506 //it may occurs that interval for default handler starts before catch start label, so this label seems as dead,
507 //but as result all this labels will be merged into one (see KT-5863)
508 } else {
509 node.instructions.remove(prevNode);
510 }
511 }
512 }
513
514 //clean dead try/catch blocks
515 List<TryCatchBlockNode> blocks = node.tryCatchBlocks;
516 for (Iterator<TryCatchBlockNode> iterator = blocks.iterator(); iterator.hasNext(); ) {
517 TryCatchBlockNode block = iterator.next();
518 if (isEmptyTryInterval(block)) {
519 iterator.remove();
520 }
521 }
522
523 return node;
524 }
525
526 private static boolean isEmptyTryInterval(@NotNull TryCatchBlockNode tryCatchBlockNode) {
527 LabelNode start = tryCatchBlockNode.start;
528 AbstractInsnNode end = tryCatchBlockNode.end;
529 while (end != start && end instanceof LabelNode) {
530 end = end.getPrevious();
531 }
532 return start == end;
533 }
534
535 @NotNull
536 private AnonymousObjectGeneration buildConstructorInvocation(
537 @NotNull String owner,
538 @NotNull String desc,
539 @NotNull Map<Integer, LambdaInfo> lambdaMapping,
540 boolean needReification
541 ) {
542 return new AnonymousObjectGeneration(
543 owner, needReification, isSameModule, lambdaMapping,
544 inliningContext.classRegeneration,
545 isAlreadyRegenerated(owner),
546 desc,
547 false
548 );
549 }
550
551 private boolean isAlreadyRegenerated(@NotNull String owner) {
552 return inliningContext.typeMapping.containsKey(owner);
553 }
554
555 @Nullable
556 public LambdaInfo getLambdaIfExists(@Nullable AbstractInsnNode insnNode) {
557 if (insnNode == null) {
558 return null;
559 }
560
561 if (insnNode.getOpcode() == Opcodes.ALOAD) {
562 int varIndex = ((VarInsnNode) insnNode).var;
563 return getLambdaIfExists(varIndex);
564 }
565 else if (insnNode instanceof FieldInsnNode) {
566 FieldInsnNode fieldInsnNode = (FieldInsnNode) insnNode;
567 if (fieldInsnNode.name.startsWith("$$$")) {
568 return findCapturedField(fieldInsnNode, nodeRemapper).getLambda();
569 }
570 }
571
572 return null;
573 }
574
575 private LambdaInfo getLambdaIfExists(int varIndex) {
576 if (varIndex < parameters.getArgsSizeOnStack()) {
577 return parameters.getParameterByDeclarationSlot(varIndex).getLambda();
578 }
579 return null;
580 }
581
582 private static void removeClosureAssertions(MethodNode node) {
583 AbstractInsnNode cur = node.instructions.getFirst();
584 while (cur != null && cur.getNext() != null) {
585 AbstractInsnNode next = cur.getNext();
586 if (next.getType() == AbstractInsnNode.METHOD_INSN) {
587 MethodInsnNode methodInsnNode = (MethodInsnNode) next;
588 if (methodInsnNode.name.equals("checkParameterIsNotNull") && methodInsnNode.owner.equals(IntrinsicMethods.INTRINSICS_CLASS_NAME)) {
589 AbstractInsnNode prev = cur.getPrevious();
590
591 assert cur.getOpcode() == Opcodes.LDC : "checkParameterIsNotNull should go after LDC but " + cur;
592 assert prev.getOpcode() == Opcodes.ALOAD : "checkParameterIsNotNull should be invoked on local var but " + prev;
593
594 node.instructions.remove(prev);
595 node.instructions.remove(cur);
596 cur = next.getNext();
597 node.instructions.remove(next);
598 next = cur;
599 }
600 }
601 cur = next;
602 }
603 }
604
605 private void transformCaptured(@NotNull MethodNode node) {
606 if (nodeRemapper.isRoot()) {
607 return;
608 }
609
610 //Fold all captured variable chain - ALOAD 0 ALOAD this$0 GETFIELD $captured - to GETFIELD $$$$captured
611 //On future decoding this field could be inline or unfolded in another field access chain (it can differ in some missed this$0)
612 AbstractInsnNode cur = node.instructions.getFirst();
613 while (cur != null) {
614 if (cur instanceof VarInsnNode && cur.getOpcode() == Opcodes.ALOAD) {
615 int varIndex = ((VarInsnNode) cur).var;
616 if (varIndex == 0 || nodeRemapper.processNonAload0FieldAccessChains(getLambdaIfExists(varIndex) != null)) {
617 List<AbstractInsnNode> accessChain = getCapturedFieldAccessChain((VarInsnNode) cur);
618 AbstractInsnNode insnNode = nodeRemapper.foldFieldAccessChainIfNeeded(accessChain, node);
619 if (insnNode != null) {
620 cur = insnNode;
621 }
622 }
623 }
624 cur = cur.getNext();
625 }
626 }
627
628 private void transformFinallyDeepIndex(@NotNull MethodNode node, int finallyDeepShift) {
629 if (finallyDeepShift == 0) {
630 return;
631 }
632
633 AbstractInsnNode cur = node.instructions.getFirst();
634 while (cur != null) {
635 if (cur instanceof MethodInsnNode && InlineCodegenUtil.isFinallyMarker(cur)) {
636 AbstractInsnNode constant = cur.getPrevious();
637 int curDeep = InlineCodegenUtil.getConstant(constant);
638 node.instructions.insert(constant, new LdcInsnNode(curDeep + finallyDeepShift));
639 node.instructions.remove(constant);
640 }
641 cur = cur.getNext();
642 }
643 }
644
645 @NotNull
646 public static List<AbstractInsnNode> getCapturedFieldAccessChain(@NotNull VarInsnNode aload0) {
647 List<AbstractInsnNode> fieldAccessChain = new ArrayList<AbstractInsnNode>();
648 fieldAccessChain.add(aload0);
649 AbstractInsnNode next = aload0.getNext();
650 while (next != null && next instanceof FieldInsnNode || next instanceof LabelNode) {
651 if (next instanceof LabelNode) {
652 next = next.getNext();
653 continue; //it will be delete on transformation
654 }
655 fieldAccessChain.add(next);
656 if ("this$0".equals(((FieldInsnNode) next).name)) {
657 next = next.getNext();
658 }
659 else {
660 break;
661 }
662 }
663
664 return fieldAccessChain;
665 }
666
667 public static void putStackValuesIntoLocals(List<Type> directOrder, int shift, InstructionAdapter iv, String descriptor) {
668 Type[] actualParams = Type.getArgumentTypes(descriptor);
669 assert actualParams.length == directOrder.size() : "Number of expected and actual params should be equals!";
670
671 int size = 0;
672 for (Type next : directOrder) {
673 size += next.getSize();
674 }
675
676 shift += size;
677 int index = directOrder.size();
678
679 for (Type next : Lists.reverse(directOrder)) {
680 shift -= next.getSize();
681 Type typeOnStack = actualParams[--index];
682 if (!typeOnStack.equals(next)) {
683 StackValue.onStack(typeOnStack).put(next, iv);
684 }
685 iv.store(shift, next);
686 }
687 }
688
689 //TODO: check it's external module
690 //TODO?: assert method exists in facade?
691 public String changeOwnerForExternalPackage(String type, int opcode) {
692 //if (isSameModule || (opcode & Opcodes.INVOKESTATIC) == 0) {
693 // return type;
694 //}
695
696 //JvmClassName name = JvmClassName.byInternalName(type);
697 //String packageClassInternalName = PackageClassUtils.getPackageClassInternalName(name.getPackageFqName());
698 //if (type.startsWith(packageClassInternalName + '$')) {
699 // VirtualFile virtualFile = InlineCodegenUtil.findVirtualFile(inliningContext.state.getProject(), type);
700 // if (virtualFile != null) {
701 // KotlinJvmBinaryClass klass = KotlinBinaryClassCache.getKotlinBinaryClass(virtualFile);
702 // if (klass != null && klass.getClassHeader().getSyntheticClassKind() == KotlinSyntheticClass.Kind.PACKAGE_PART) {
703 // return packageClassInternalName;
704 // }
705 // }
706 //}
707
708 return type;
709 }
710
711 @NotNull
712 public RuntimeException wrapException(@NotNull Throwable originalException, @NotNull MethodNode node, @NotNull String errorSuffix) {
713 if (originalException instanceof InlineException) {
714 return new InlineException(errorPrefix + ": " + errorSuffix, originalException);
715 }
716 else {
717 return new InlineException(errorPrefix + ": " + errorSuffix + "\ncause: " +
718 getNodeText(node), originalException);
719 }
720 }
721
722 @NotNull
723 //process local and global returns (local substituted with goto end-label global kept unchanged)
724 public static List<PointForExternalFinallyBlocks> processReturns(@NotNull MethodNode node, @NotNull LabelOwner labelOwner, boolean remapReturn, Label endLabel) {
725 if (!remapReturn) {
726 return Collections.emptyList();
727 }
728 List<PointForExternalFinallyBlocks> result = new ArrayList<PointForExternalFinallyBlocks>();
729 InsnList instructions = node.instructions;
730 AbstractInsnNode insnNode = instructions.getFirst();
731 while (insnNode != null) {
732 if (InlineCodegenUtil.isReturnOpcode(insnNode.getOpcode())) {
733 AbstractInsnNode previous = insnNode.getPrevious();
734 MethodInsnNode flagNode;
735 boolean isLocalReturn = true;
736 String labelName = null;
737 if (previous != null && previous instanceof MethodInsnNode && InlineCodegenUtil.NON_LOCAL_RETURN.equals(((MethodInsnNode) previous).owner)) {
738 flagNode = (MethodInsnNode) previous;
739 labelName = flagNode.name;
740 }
741
742 if (labelName != null) {
743 isLocalReturn = labelOwner.isMyLabel(labelName);
744 //remove global return flag
745 if (isLocalReturn) {
746 instructions.remove(previous);
747 }
748 }
749
750 if (isLocalReturn && endLabel != null) {
751 LabelNode labelNode = (LabelNode) endLabel.info;
752 JumpInsnNode jumpInsnNode = new JumpInsnNode(Opcodes.GOTO, labelNode);
753 instructions.insert(insnNode, jumpInsnNode);
754 instructions.remove(insnNode);
755 insnNode = jumpInsnNode;
756 }
757
758 //genetate finally block before nonLocalReturn flag/return/goto
759 LabelNode label = new LabelNode();
760 instructions.insert(insnNode, label);
761 result.add(new PointForExternalFinallyBlocks(getInstructionToInsertFinallyBefore(insnNode, isLocalReturn),
762 getReturnType(insnNode.getOpcode()),
763 label));
764 }
765 insnNode = insnNode.getNext();
766 }
767 return result;
768 }
769
770 @NotNull
771 private static AbstractInsnNode getInstructionToInsertFinallyBefore(@NotNull AbstractInsnNode nonLocalReturnOrJump, boolean isLocal) {
772 return isLocal ? nonLocalReturnOrJump : nonLocalReturnOrJump.getPrevious();
773 }
774
775 //Place to insert finally blocks from try blocks that wraps inline fun call
776 public static class PointForExternalFinallyBlocks {
777
778 final AbstractInsnNode beforeIns;
779
780 final Type returnType;
781
782 final LabelNode finallyIntervalEnd;
783
784 public PointForExternalFinallyBlocks(
785 @NotNull AbstractInsnNode beforeIns,
786 @NotNull Type returnType,
787 @NotNull LabelNode finallyIntervalEnd
788 ) {
789 this.beforeIns = beforeIns;
790 this.returnType = returnType;
791 this.finallyIntervalEnd = finallyIntervalEnd;
792 }
793
794 }
795
796 }