示例#1
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;
  }
示例#2
0
  @NotNull
  // process local and global returns (local substituted with goto end-label global kept unchanged)
  public static List<PointForExternalFinallyBlocks> processReturns(
      @NotNull MethodNode node,
      @NotNull LabelOwner labelOwner,
      boolean remapReturn,
      Label endLabel) {
    if (!remapReturn) {
      return Collections.emptyList();
    }
    List<PointForExternalFinallyBlocks> result = new ArrayList<PointForExternalFinallyBlocks>();
    InsnList instructions = node.instructions;
    AbstractInsnNode insnNode = instructions.getFirst();
    while (insnNode != null) {
      if (InlineCodegenUtil.isReturnOpcode(insnNode.getOpcode())) {
        AbstractInsnNode previous = insnNode.getPrevious();
        MethodInsnNode flagNode;
        boolean isLocalReturn = true;
        String labelName = null;
        if (previous != null
            && previous instanceof MethodInsnNode
            && InlineCodegenUtil.NON_LOCAL_RETURN.equals(((MethodInsnNode) previous).owner)) {
          flagNode = (MethodInsnNode) previous;
          labelName = flagNode.name;
        }

        if (labelName != null) {
          isLocalReturn = labelOwner.isMyLabel(labelName);
          // remove global return flag
          if (isLocalReturn) {
            instructions.remove(previous);
          }
        }

        if (isLocalReturn && endLabel != null) {
          LabelNode labelNode = (LabelNode) endLabel.info;
          JumpInsnNode jumpInsnNode = new JumpInsnNode(Opcodes.GOTO, labelNode);
          instructions.insert(insnNode, jumpInsnNode);
          instructions.remove(insnNode);
          insnNode = jumpInsnNode;
        }

        // genetate finally block before nonLocalReturn flag/return/goto
        result.add(
            new PointForExternalFinallyBlocks(
                isLocalReturn ? insnNode : insnNode.getPrevious(),
                getReturnType(insnNode.getOpcode())));
      }
      insnNode = insnNode.getNext();
    }
    return result;
  }
示例#3
0
  @NotNull
  protected MethodNode markPlacesForInlineAndRemoveInlinable(@NotNull MethodNode node) {
    node = prepareNode(node);

    Analyzer<SourceValue> analyzer =
        new Analyzer<SourceValue>(new SourceInterpreter()) {
          @NotNull
          @Override
          protected Frame<SourceValue> newFrame(int nLocals, int nStack) {
            return new Frame<SourceValue>(nLocals, nStack) {
              @Override
              public void execute(
                  @NotNull AbstractInsnNode insn, Interpreter<SourceValue> interpreter)
                  throws AnalyzerException {
                if (insn.getOpcode() == Opcodes.RETURN) {
                  // there is exception on void non local return in frame
                  return;
                }
                super.execute(insn, interpreter);
              }
            };
          }
        };

    Frame<SourceValue>[] sources;
    try {
      sources = analyzer.analyze("fake", node);
    } catch (AnalyzerException e) {
      throw wrapException(e, node, "couldn't inline method call");
    }

    AbstractInsnNode cur = node.instructions.getFirst();
    int index = 0;

    boolean awaitClassReification = false;
    Set<LabelNode> possibleDeadLabels = new HashSet<LabelNode>();

    while (cur != null) {
      Frame<SourceValue> frame = sources[index];

      if (frame != null) {
        if (ReifiedTypeInliner.isNeedClassReificationMarker(cur)) {
          awaitClassReification = true;
        } else if (cur.getType() == AbstractInsnNode.METHOD_INSN) {
          MethodInsnNode methodInsnNode = (MethodInsnNode) cur;
          String owner = methodInsnNode.owner;
          String desc = methodInsnNode.desc;
          String name = methodInsnNode.name;
          // TODO check closure
          int paramLength = Type.getArgumentTypes(desc).length + 1; // non static
          if (isInvokeOnLambda(owner, name) /*&& methodInsnNode.owner.equals(INLINE_RUNTIME)*/) {
            SourceValue sourceValue = frame.getStack(frame.getStackSize() - paramLength);

            LambdaInfo lambdaInfo = null;
            int varIndex = -1;

            if (sourceValue.insns.size() == 1) {
              AbstractInsnNode insnNode = sourceValue.insns.iterator().next();

              lambdaInfo = getLambdaIfExists(insnNode);
              if (lambdaInfo != null) {
                // remove inlinable access
                node.instructions.remove(insnNode);
              }
            }

            invokeCalls.add(new InvokeCall(varIndex, lambdaInfo));
          } else if (isAnonymousConstructorCall(owner, name)) {
            Map<Integer, LambdaInfo> lambdaMapping = new HashMap<Integer, LambdaInfo>();
            int paramStart = frame.getStackSize() - paramLength;

            for (int i = 0; i < paramLength; i++) {
              SourceValue sourceValue = frame.getStack(paramStart + i);
              if (sourceValue.insns.size() == 1) {
                AbstractInsnNode insnNode = sourceValue.insns.iterator().next();
                LambdaInfo lambdaInfo = getLambdaIfExists(insnNode);
                if (lambdaInfo != null) {
                  lambdaMapping.put(i, lambdaInfo);
                  node.instructions.remove(insnNode);
                }
              }
            }

            anonymousObjectGenerations.add(
                buildConstructorInvocation(owner, desc, lambdaMapping, awaitClassReification));
            awaitClassReification = false;
          }
        } else if (cur.getOpcode() == Opcodes.GETSTATIC) {
          FieldInsnNode fieldInsnNode = (FieldInsnNode) cur;
          String owner = fieldInsnNode.owner;
          if (isAnonymousSingletonLoad(owner, fieldInsnNode.name)) {
            anonymousObjectGenerations.add(
                new AnonymousObjectGeneration(
                    owner, isSameModule, awaitClassReification, isAlreadyRegenerated(owner), true));
            awaitClassReification = false;
          }
        }
      }
      AbstractInsnNode prevNode = cur;
      cur = cur.getNext();
      index++;

      // given frame is <tt>null</tt> if and only if the corresponding instruction cannot be reached
      // (dead code).
      if (frame == null) {
        // clean dead code otherwise there is problems in unreachable finally block, don't touch
        // label it cause try/catch/finally problems
        if (prevNode.getType() == AbstractInsnNode.LABEL) {
          // NB: Cause we generate exception table for default handler using gaps (see
          // ExpressionCodegen.visitTryExpression)
          // it may occurs that interval for default handler starts before catch start label, so
          // this label seems as dead,
          // but as result all this labels will be merged into one (see KT-5863)
        } else {
          node.instructions.remove(prevNode);
        }
      }
    }

    // clean dead try/catch blocks
    List<TryCatchBlockNode> blocks = node.tryCatchBlocks;
    for (Iterator<TryCatchBlockNode> iterator = blocks.iterator(); iterator.hasNext(); ) {
      TryCatchBlockNode block = iterator.next();
      if (isEmptyTryInterval(block)) {
        iterator.remove();
      }
    }

    return node;
  }