Ejemplo n.º 1
0
  public void visitExceptionInfo(
      Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo) {
    int startPC = Math.max(exceptionInfo.u2startPC, clipStart);
    int endPC = Math.min(exceptionInfo.u2endPC, clipEnd);
    int handlerPC = exceptionInfo.u2handlerPC;
    int catchType = exceptionInfo.u2catchType;

    // Exclude any subroutine invocations that jump out of the try block,
    // by adding a try block before (and later on, after) each invocation.
    for (int offset = startPC; offset < endPC; offset++) {
      if (branchTargetFinder.isSubroutineInvocation(offset)) {
        Instruction instruction = InstructionFactory.create(codeAttribute.code, offset);
        int instructionLength = instruction.length(offset);

        // Is it a subroutine invocation?
        if (!exceptionInfo.isApplicable(offset + ((BranchInstruction) instruction).branchOffset)) {
          if (DEBUG) {
            System.out.println(
                "  Appending extra exception [" + startPC + " -> " + offset + "] -> " + handlerPC);
          }

          // Append a try block that ends before the subroutine invocation.
          codeAttributeComposer.appendException(
              new ExceptionInfo(startPC, offset, handlerPC, catchType));

          // The next try block will start after the subroutine invocation.
          startPC = offset + instructionLength;
        }
      }
    }

    if (DEBUG) {
      System.out.println(
          "  Appending exception [" + startPC + " -> " + endPC + "] -> " + handlerPC);
    }

    // Append the exception. Note that exceptions with empty try blocks
    // are automatically ignored.
    codeAttributeComposer.appendException(new ExceptionInfo(startPC, endPC, handlerPC, catchType));
  }
 public void visitExceptionInfo(
     Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo) {
   if (!exceptionInfo.isApplicable(instructionOffset)) {
     exceptionInfoVisitor.visitExceptionInfo(clazz, method, codeAttribute, exceptionInfo);
   }
 }