protected String printVarInsnNode(VarInsnNode vin, ListIterator<?> it) {
    StringBuilder sb = new StringBuilder();
    sb.append(nameOpcode(vin.opcode()));
    sb.append(vin.var);
    if (Decompiler.BYTECODE.getSettings().isSelected(ClassNodeDecompiler.Settings.DEBUG_HELPERS)) {
      if (vin.var == 0 && !Modifier.isStatic(mNode.access)) {
        sb.append(" // reference to self");
      } else {
        final int refIndex = vin.var - (Modifier.isStatic(mNode.access) ? 0 : 1);
        if (refIndex >= 0 && refIndex < args.length - 1) {
          sb.append(" // reference to " + args[refIndex].name);
        }
      }
    }

    return sb.toString();
  }
示例#2
0
  @NotNull
  public static List<AbstractInsnNode> getCapturedFieldAccessChain(@NotNull VarInsnNode aload0) {
    List<AbstractInsnNode> fieldAccessChain = new ArrayList<AbstractInsnNode>();
    fieldAccessChain.add(aload0);
    AbstractInsnNode next = aload0.getNext();
    while (next != null && next instanceof FieldInsnNode || next instanceof LabelNode) {
      if (next instanceof LabelNode) {
        next = next.getNext();
        continue; // it will be delete on transformation
      }
      fieldAccessChain.add(next);
      if ("this$0".equals(((FieldInsnNode) next).name)) {
        next = next.getNext();
      } else {
        break;
      }
    }

    return fieldAccessChain;
  }
  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;
  }