Exemplo n.º 1
0
 @NotNull
 public static CapturedParamInfo findCapturedField(
     FieldInsnNode node, FieldRemapper fieldRemapper) {
   assert node.name.startsWith("$$$") : "Captured field template should start with $$$ prefix";
   FieldInsnNode fin =
       new FieldInsnNode(node.getOpcode(), node.owner, node.name.substring(3), node.desc);
   CapturedParamInfo field = fieldRemapper.findField(fin);
   if (field == null) {
     throw new IllegalStateException(
         "Couldn't find captured field "
             + node.owner
             + "."
             + node.name
             + " in "
             + fieldRemapper.getLambdaInternalName());
   }
   return field;
 }
Exemplo n.º 2
0
  private void transformCaptured(@NotNull MethodNode node) {
    if (nodeRemapper.isRoot()) {
      return;
    }

    // Fold all captured variable chain - ALOAD 0 ALOAD this$0 GETFIELD $captured - to GETFIELD
    // $$$$captured
    // On future decoding this field could be inline or unfolded in another field access chain (it
    // can differ in some missed this$0)
    AbstractInsnNode cur = node.instructions.getFirst();
    while (cur != null) {
      if (cur instanceof VarInsnNode && cur.getOpcode() == Opcodes.ALOAD) {
        if (((VarInsnNode) cur).var == 0) {
          List<AbstractInsnNode> accessChain = getCapturedFieldAccessChain((VarInsnNode) cur);
          AbstractInsnNode insnNode = nodeRemapper.foldFieldAccessChainIfNeeded(accessChain, node);
          if (insnNode != null) {
            cur = insnNode;
          }
        }
      }
      cur = cur.getNext();
    }
  }
  private List<CapturedParamInfo> extractParametersMappingAndPatchConstructor(
      @NotNull MethodNode constructor,
      @NotNull ParametersBuilder capturedParamBuilder,
      @NotNull ParametersBuilder constructorParamBuilder,
      @NotNull final AnonymousObjectGeneration anonymousObjectGen,
      @NotNull FieldRemapper parentFieldRemapper) {

    CapturedParamOwner owner =
        new CapturedParamOwner() {
          @Override
          public Type getType() {
            return Type.getObjectType(anonymousObjectGen.getOwnerInternalName());
          }
        };

    Set<LambdaInfo> capturedLambdas =
        new LinkedHashSet<LambdaInfo>(); // captured var of inlined parameter
    List<CapturedParamInfo> constructorAdditionalFakeParams = new ArrayList<CapturedParamInfo>();
    Map<Integer, LambdaInfo> indexToLambda = anonymousObjectGen.getLambdasToInline();
    Set<Integer> capturedParams = new HashSet<Integer>();

    // load captured parameters and patch instruction list (NB: there is also could be object
    // fields)
    AbstractInsnNode cur = constructor.instructions.getFirst();
    while (cur != null) {
      if (cur instanceof FieldInsnNode) {
        FieldInsnNode fieldNode = (FieldInsnNode) cur;
        String fieldName = fieldNode.name;
        if (fieldNode.getOpcode() == Opcodes.PUTFIELD
            && InlineCodegenUtil.isCapturedFieldName(fieldName)) {

          boolean isPrevVarNode = fieldNode.getPrevious() instanceof VarInsnNode;
          boolean isPrevPrevVarNode =
              isPrevVarNode && fieldNode.getPrevious().getPrevious() instanceof VarInsnNode;

          if (isPrevPrevVarNode) {
            VarInsnNode node = (VarInsnNode) fieldNode.getPrevious().getPrevious();
            if (node.var == 0) {
              VarInsnNode previous = (VarInsnNode) fieldNode.getPrevious();
              int varIndex = previous.var;
              LambdaInfo lambdaInfo = indexToLambda.get(varIndex);
              String newFieldName =
                  isThis0(fieldName)
                          && shouldRenameThis0(parentFieldRemapper, indexToLambda.values())
                      ? getNewFieldName(fieldName, true)
                      : fieldName;
              CapturedParamInfo info =
                  capturedParamBuilder.addCapturedParam(
                      owner,
                      fieldName,
                      newFieldName,
                      Type.getType(fieldNode.desc),
                      lambdaInfo != null,
                      null);
              if (lambdaInfo != null) {
                info.setLambda(lambdaInfo);
                capturedLambdas.add(lambdaInfo);
              }
              constructorAdditionalFakeParams.add(info);
              capturedParams.add(varIndex);

              constructor.instructions.remove(previous.getPrevious());
              constructor.instructions.remove(previous);
              AbstractInsnNode temp = cur;
              cur = cur.getNext();
              constructor.instructions.remove(temp);
              continue;
            }
          }
        }
      }
      cur = cur.getNext();
    }

    constructorParamBuilder.addThis(oldObjectType, false);
    String constructorDesc = anonymousObjectGen.getConstructorDesc();

    if (constructorDesc == null) {
      // in case of anonymous object with empty closure
      constructorDesc = Type.getMethodDescriptor(Type.VOID_TYPE);
    }

    Type[] types = Type.getArgumentTypes(constructorDesc);
    for (Type type : types) {
      LambdaInfo info = indexToLambda.get(constructorParamBuilder.getNextValueParameterIndex());
      ParameterInfo parameterInfo =
          constructorParamBuilder.addNextParameter(type, info != null, null);
      parameterInfo.setLambda(info);
      if (capturedParams.contains(parameterInfo.getIndex())) {
        parameterInfo.setCaptured(true);
      } else {
        // otherwise it's super constructor parameter
      }
    }

    // For all inlined lambdas add their captured parameters
    // TODO: some of such parameters could be skipped - we should perform additional analysis
    Map<String, LambdaInfo> capturedLambdasToInline =
        new HashMap<String, LambdaInfo>(); // captured var of inlined parameter
    List<CapturedParamDesc> allRecapturedParameters = new ArrayList<CapturedParamDesc>();
    boolean addCapturedNotAddOuter =
        parentFieldRemapper.isRoot()
            || (parentFieldRemapper instanceof InlinedLambdaRemapper
                && parentFieldRemapper.getParent().isRoot());
    Map<String, CapturedParamInfo> alreadyAdded = new HashMap<String, CapturedParamInfo>();
    for (LambdaInfo info : capturedLambdas) {
      if (addCapturedNotAddOuter) {
        for (CapturedParamDesc desc : info.getCapturedVars()) {
          String key = desc.getFieldName() + "$$$" + desc.getType().getClassName();
          CapturedParamInfo alreadyAddedParam = alreadyAdded.get(key);

          CapturedParamInfo recapturedParamInfo =
              capturedParamBuilder.addCapturedParam(
                  desc,
                  alreadyAddedParam != null
                      ? alreadyAddedParam.getNewFieldName()
                      : getNewFieldName(desc.getFieldName(), false));
          StackValue composed =
              StackValue.field(
                  desc.getType(),
                  oldObjectType, /*TODO owner type*/
                  recapturedParamInfo.getNewFieldName(),
                  false,
                  StackValue.LOCAL_0);
          recapturedParamInfo.setRemapValue(composed);
          allRecapturedParameters.add(desc);

          constructorParamBuilder
              .addCapturedParam(recapturedParamInfo, recapturedParamInfo.getNewFieldName())
              .setRemapValue(composed);
          if (alreadyAddedParam != null) {
            recapturedParamInfo.setSkipInConstructor(true);
          }

          if (isThis0(desc.getFieldName())) {
            alreadyAdded.put(key, recapturedParamInfo);
          }
        }
      }
      capturedLambdasToInline.put(info.getLambdaClassType().getInternalName(), info);
    }

    if (parentFieldRemapper instanceof InlinedLambdaRemapper
        && !capturedLambdas.isEmpty()
        && !addCapturedNotAddOuter) {
      // lambda with non InlinedLambdaRemapper already have outer
      FieldRemapper parent = parentFieldRemapper.getParent();
      assert parent instanceof RegeneratedLambdaFieldRemapper;
      final Type ownerType = Type.getObjectType(parent.getLambdaInternalName());

      CapturedParamDesc desc =
          new CapturedParamDesc(
              new CapturedParamOwner() {
                @Override
                public Type getType() {
                  return ownerType;
                }
              },
              InlineCodegenUtil.THIS,
              ownerType);
      CapturedParamInfo recapturedParamInfo =
          capturedParamBuilder.addCapturedParam(
              desc, InlineCodegenUtil.THIS$0 /*outer lambda/object*/);
      StackValue composed = StackValue.LOCAL_0;
      recapturedParamInfo.setRemapValue(composed);
      allRecapturedParameters.add(desc);

      constructorParamBuilder
          .addCapturedParam(recapturedParamInfo, recapturedParamInfo.getNewFieldName())
          .setRemapValue(composed);
    }

    anonymousObjectGen.setAllRecapturedParameters(allRecapturedParameters);
    anonymousObjectGen.setCapturedLambdasToInline(capturedLambdasToInline);

    return constructorAdditionalFakeParams;
  }