org.objectweb.asm.Opcodes# IAND 源码实例Demo

@Override
public void visitInsn(int opcode) {
    switch (opcode) {
        case Opcodes.IAND:
            if (this.shouldMutate("integer and"))  {
                mv.visitInsn(Opcodes.POP);
            } else  {
                mv.visitInsn(opcode);
            }
            break;
        case Opcodes.IOR:
            if (this.shouldMutate("integer or"))  {
                mv.visitInsn(Opcodes.POP);
            } else  {
                mv.visitInsn(opcode);
            }
            break;
        case Opcodes.LAND:
            if (this.shouldMutate("long and"))  {
                mv.visitInsn(Opcodes.POP2);
            } else  {
                mv.visitInsn(opcode);
            }
            break;
        case Opcodes.LOR:
            if (this.shouldMutate("long or"))  {
                mv.visitInsn(Opcodes.POP2);
            } else  {
                mv.visitInsn(opcode);
            }
            break;
        default:
            mv.visitInsn(opcode);
            break;
    }
}
 

public final void and(Type type) {
    switch (type.getOpcode(Opcodes.IAND)) {
    case Opcodes.IAND:
        iand();
        return;
    case Opcodes.LAND:
        land();
        return;
    default:
        throw new IllegalArgumentException();
    }
}
 

private List<AbstractInsnNode> getPossibleInsns(AbstractInsnNode ain)
{
	List<AbstractInsnNode> instrs = new ArrayList<>();
	while(ain != null)
	{
		if(ain instanceof LineNumberNode || ain instanceof FrameNode)
		{
			ain = ain.getNext();
			continue;
		}
		instrs.add(ain);
		if(instrs.size() >= 23)
			break;
		ain = ain.getNext();
	}
	if(instrs.size() == 23 && instrs.get(0).getOpcode() == Opcodes.ILOAD
		&& instrs.get(1).getOpcode() == Opcodes.ICONST_1
		&& instrs.get(2).getOpcode() == Opcodes.ISUB
		&& instrs.get(3).getOpcode() == Opcodes.ISTORE)
	{
		int var1 = ((VarInsnNode)instrs.get(0)).var;
		int var2 = ((VarInsnNode)instrs.get(3)).var;
		if(instrs.get(4).getOpcode() == Opcodes.ILOAD
			&& ((VarInsnNode)instrs.get(4)).var == var1
			&& instrs.get(5).getOpcode() == Opcodes.ILOAD
			&& ((VarInsnNode)instrs.get(5)).var == var2
			&& instrs.get(6).getOpcode() == Opcodes.IMUL
			&& instrs.get(7).getOpcode() == Opcodes.ISTORE
			&& ((VarInsnNode)instrs.get(7)).var == var2
			&& instrs.get(8).getOpcode() == Opcodes.ILOAD
			&& ((VarInsnNode)instrs.get(8)).var == var2
			&& instrs.get(9).getOpcode() == Opcodes.ICONST_2
			&& instrs.get(10).getOpcode() == Opcodes.IREM
			&& instrs.get(11).getOpcode() == Opcodes.ISTORE
			&& ((VarInsnNode)instrs.get(11)).var == var2
			&& instrs.get(12).getOpcode() == Opcodes.ILOAD
			&& ((VarInsnNode)instrs.get(12)).var == var2
			&& instrs.get(13).getOpcode() == Opcodes.I2L
			&& instrs.get(14).getOpcode() == Opcodes.ICONST_0
			&& instrs.get(15).getOpcode() == Opcodes.I2L
			&& instrs.get(16).getOpcode() == Opcodes.LCMP
			&& instrs.get(17).getOpcode() == Opcodes.ICONST_1
			&& instrs.get(18).getOpcode() == Opcodes.IXOR
			&& instrs.get(19).getOpcode() == Opcodes.ICONST_1
			&& instrs.get(20).getOpcode() == Opcodes.IAND
			&& instrs.get(21).getOpcode() == Opcodes.IFEQ
			&& instrs.get(22).getOpcode() == Opcodes.IINC)
			return instrs;
	}
	return null;
}
 

public static boolean isBinaryOp(Instruction instr) {
    switch (instr.getOpcode()) {
        case Opcodes.ISHL:
        case Opcodes.ISHR:
        case Opcodes.LSHL:
        case Opcodes.LSHR:
        case Opcodes.IUSHR:
        case Opcodes.LUSHR:
        case Opcodes.DCMPG:
        case Opcodes.DCMPL:
        case Opcodes.FCMPG:
        case Opcodes.FCMPL:
        case Opcodes.LCMP:
        case Opcodes.IOR:
        case Opcodes.LOR:
        case Opcodes.IXOR:
        case Opcodes.LXOR:
        case Opcodes.IAND:
        case Opcodes.LAND:
        case Opcodes.FADD:
        case Opcodes.DADD:
        case Opcodes.IADD:
        case Opcodes.LADD:
        case Opcodes.FSUB:
        case Opcodes.DSUB:
        case Opcodes.ISUB:
        case Opcodes.LSUB:
        case Opcodes.FDIV:
        case Opcodes.DDIV:
        case Opcodes.LDIV:
        case Opcodes.IDIV:
        case Opcodes.IREM:
        case Opcodes.FREM:
        case Opcodes.DREM:
        case Opcodes.LREM:
        case Opcodes.FMUL:
        case Opcodes.DMUL:
        case Opcodes.IMUL:
        case Opcodes.LMUL:
            return true;
    }
    return false;
}
 

public static boolean isArithmeticOp(Instruction instr) {
    
    switch (instr.getOpcode()) {
        case Opcodes.ISHL:
        case Opcodes.ISHR:
        case Opcodes.LSHL:
        case Opcodes.LSHR:
        case Opcodes.IUSHR:
        case Opcodes.LUSHR:
        
        case Opcodes.DCMPG:
        case Opcodes.DCMPL:
        case Opcodes.FCMPG:
        case Opcodes.FCMPL:
        case Opcodes.LCMP:
        case Opcodes.FNEG:
        case Opcodes.DNEG:
        case Opcodes.INEG:
        case Opcodes.D2F:
        case Opcodes.D2I:
        case Opcodes.D2L:
        case Opcodes.F2D:
        case Opcodes.F2I:
        case Opcodes.F2L:
        case Opcodes.L2D:
        case Opcodes.L2F:
        case Opcodes.L2I:
        case Opcodes.I2L:
        case Opcodes.I2B:
        case Opcodes.I2C:
        case Opcodes.I2D:
        case Opcodes.I2F:
        case Opcodes.I2S:
        case Opcodes.IOR:
        case Opcodes.LOR:
        case Opcodes.IXOR:
        case Opcodes.LXOR:
        case Opcodes.IAND:
        case Opcodes.LAND:
        case Opcodes.FADD:
        case Opcodes.DADD:
        case Opcodes.IADD:
        case Opcodes.LADD:
        case Opcodes.FSUB:
        case Opcodes.DSUB:
        case Opcodes.ISUB:
        case Opcodes.LSUB:
        case Opcodes.FDIV:
        case Opcodes.DDIV:
        case Opcodes.LDIV:
        case Opcodes.IDIV:
        case Opcodes.IREM:
        case Opcodes.FREM:
        case Opcodes.DREM:
        case Opcodes.LREM:
        case Opcodes.FMUL:
        case Opcodes.DMUL:
        case Opcodes.IMUL:
        case Opcodes.LMUL:
            return true;
    }
    return false;
}