Class SourceInterpreter

    • Method Detail

      • newOperation

        public SourceValue newOperation​(AbstractInsnNode insn)
        Description copied from class: Interpreter
        Interprets a bytecode instruction without arguments. This method is called for the following opcodes:

        ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, BIPUSH, SIPUSH, LDC, JSR, GETSTATIC, NEW

        Specified by:
        newOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        Returns:
        the result of the interpretation of the given instruction.
      • copyOperation

        public SourceValue copyOperation​(AbstractInsnNode insn,
                                         SourceValue value)
        Description copied from class: Interpreter
        Interprets a bytecode instruction that moves a value on the stack or to or from local variables. This method is called for the following opcodes:

        ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP

        Specified by:
        copyOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        value - the value that must be moved by the instruction.
        Returns:
        the result of the interpretation of the given instruction. The returned value must be equal to the given value.
      • unaryOperation

        public SourceValue unaryOperation​(AbstractInsnNode insn,
                                          SourceValue value)
        Description copied from class: Interpreter
        Interprets a bytecode instruction with a single argument. This method is called for the following opcodes:

        INEG, LNEG, FNEG, DNEG, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, TABLESWITCH, LOOKUPSWITCH, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, PUTSTATIC, GETFIELD, NEWARRAY, ANEWARRAY, ARRAYLENGTH, ATHROW, CHECKCAST, INSTANCEOF, MONITORENTER, MONITOREXIT, IFNULL, IFNONNULL

        Specified by:
        unaryOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        value - the argument of the instruction to be interpreted.
        Returns:
        the result of the interpretation of the given instruction.
      • binaryOperation

        public SourceValue binaryOperation​(AbstractInsnNode insn,
                                           SourceValue value1,
                                           SourceValue value2)
        Description copied from class: Interpreter
        Interprets a bytecode instruction with two arguments. This method is called for the following opcodes:

        IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, PUTFIELD

        Specified by:
        binaryOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        value1 - the first argument of the instruction to be interpreted.
        value2 - the second argument of the instruction to be interpreted.
        Returns:
        the result of the interpretation of the given instruction.
      • ternaryOperation

        public SourceValue ternaryOperation​(AbstractInsnNode insn,
                                            SourceValue value1,
                                            SourceValue value2,
                                            SourceValue value3)
        Description copied from class: Interpreter
        Interprets a bytecode instruction with three arguments. This method is called for the following opcodes:

        IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE

        Specified by:
        ternaryOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        value1 - the first argument of the instruction to be interpreted.
        value2 - the second argument of the instruction to be interpreted.
        value3 - the third argument of the instruction to be interpreted.
        Returns:
        the result of the interpretation of the given instruction.
      • naryOperation

        public SourceValue naryOperation​(AbstractInsnNode insn,
                                         java.util.List<? extends SourceValue> values)
        Description copied from class: Interpreter
        Interprets a bytecode instruction with a variable number of arguments. This method is called for the following opcodes:

        INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE, MULTIANEWARRAY and INVOKEDYNAMIC

        Specified by:
        naryOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        values - the arguments of the instruction to be interpreted.
        Returns:
        the result of the interpretation of the given instruction.
      • returnOperation

        public void returnOperation​(AbstractInsnNode insn,
                                    SourceValue value,
                                    SourceValue expected)
        Description copied from class: Interpreter
        Interprets a bytecode return instruction. This method is called for the following opcodes:

        IRETURN, LRETURN, FRETURN, DRETURN, ARETURN

        Specified by:
        returnOperation in class Interpreter<SourceValue>
        Parameters:
        insn - the bytecode instruction to be interpreted.
        value - the argument of the instruction to be interpreted.
        expected - the expected return type of the analyzed method.
      • merge

        public SourceValue merge​(SourceValue value1,
                                 SourceValue value2)
        Description copied from class: Interpreter
        Merges two values. The merge operation must return a value that represents both values (for instance, if the two values are two types, the merged value must be a common super type of the two types. If the two values are integer intervals, the merged value must be an interval that contains the previous ones. Likewise for other types of values).
        Specified by:
        merge in class Interpreter<SourceValue>
        Parameters:
        value1 - a value.
        value2 - another value.
        Returns:
        the merged value. If the merged value is equal to value1, this method must return value1.