Interface InstructionContext


  • public interface InstructionContext
    An InstructionContext offers convenient access to information like control flow successors and such.
    • Method Detail

      • getTag

        int getTag()
        The getTag and setTag methods may be used for temporary flagging, such as graph colouring. Nothing in the InstructionContext object depends on the value of the tag. JustIce does not use it.
        See Also:
        setTag(int tag)
      • setTag

        void setTag​(int tag)
        The getTag and setTag methods may be used for temporary flagging, such as graph colouring. Nothing in the InstructionContext object depends on the value of the tag. JustIce does not use it.
        See Also:
        getTag()
      • execute

        boolean execute​(Frame inFrame,
                        ArrayList<InstructionContext> executionPredecessors,
                        InstConstraintVisitor icv,
                        ExecutionVisitor ev)
        This method symbolically executes the Instruction held in the InstructionContext. It "merges in" the incoming execution frame situation (see The Java Virtual Machine Specification, 2nd edition, page 146). By so doing, the outgoing execution frame situation is calculated. This method is JustIce-specific and is usually of no sense for users of the ControlFlowGraph class. They should use getInstruction().accept(Visitor), possibly in conjunction with the ExecutionVisitor.
        Returns:
        true - if and only if the "outgoing" frame situation changed from the one before execute()ing.
        See Also:
        ControlFlowGraph, ExecutionVisitor, getOutFrame(ArrayList)
      • getInFrame

        Frame getInFrame()
      • getInstruction

        InstructionHandle getInstruction()
        Returns the InstructionHandle this InstructionContext is wrapped around.
        Returns:
        The InstructionHandle this InstructionContext is wrapped around.
      • getExceptionHandlers

        ExceptionHandler[] getExceptionHandlers()
        Returns the exception handlers that protect this instruction. They are special control flow successors.