Package serp.bytecode

Class LoadInstruction

    • Field Detail

      • _mappings

        private static final java.lang.Class[][] _mappings
      • _type

        java.lang.String _type
    • Constructor Detail

      • LoadInstruction

        LoadInstruction​(Code owner)
      • LoadInstruction

        LoadInstruction​(Code owner,
                        int opcode)
    • Method Detail

      • getLength

        int getLength()
        Description copied from class: Instruction
        Return the length in bytes of this opcode, including all arguments. For many opcodes this method relies on an up-to-date byte index.
        Overrides:
        getLength in class Instruction
      • getStackChange

        public int getStackChange()
        Description copied from class: Instruction
        Return the number of stack positions this instruction pushes or pops during its execution.
        Overrides:
        getStackChange in class Instruction
        Returns:
        0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack
      • getLogicalStackChange

        public int getLogicalStackChange()
        Description copied from class: Instruction
        Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.
        Overrides:
        getLogicalStackChange in class Instruction
      • getTypeName

        public java.lang.String getTypeName()
        Description copied from class: TypedInstruction
        Return the type name for this instruction. If the type has not been set, this method will return null.
        Overrides:
        getTypeName in class LocalVariableInstruction
      • setType

        public TypedInstruction setType​(java.lang.String type)
        Description copied from class: TypedInstruction
        Set the type of this instruction. Types that have no direct support will be converted accordingly.
        Overrides:
        setType in class LocalVariableInstruction
        Returns:
        this instruction, for method chaining
      • setThis

        public LoadInstruction setThis()
        Equivalent to setLocal (0).setType (Object.class); the this ptr is always passed in local variable 0.
        Returns:
        this instruction, for method chaining
      • isThis

        public boolean isThis()
        Equivalent to getLocal () == 0 && getType () == Object.class; the this ptr is always passed in local variable 0.
      • acceptVisit

        public void acceptVisit​(BCVisitor visit)
        Description copied from interface: VisitAcceptor
        Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.
        Specified by:
        acceptVisit in interface VisitAcceptor
        Overrides:
        acceptVisit in class Instruction
      • read

        void read​(java.io.DataInput in)
           throws java.io.IOException
        Description copied from class: Instruction
        Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.
        Overrides:
        read in class Instruction
        Throws:
        java.io.IOException
      • write

        void write​(java.io.DataOutput out)
            throws java.io.IOException
        Description copied from class: Instruction
        Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.
        Overrides:
        write in class Instruction
        Throws:
        java.io.IOException