Section 2. The courts of the commonwealth and the justices thereof shall have and exercise all the powers necessary for the performance of their duties. They may issue all writs, warrants and processes and make and award judgments, decrees, orders and injunctions necessary or proper to carry into effect the powers granted to them, and, if no form for such writ or process is prescribed by statute, they shall frame one in conformity with the principles of law and the usual course of proceedings in the courts of the commonwealth.