Abstract: A method and a system for register clearing in data flow analysis in decompilation are provided. The method includes: reading all function statements in a code file; sequentially judging each of the read function statements, and creating a binary tree and inputting the function statement into the binary tree in a case that the function statement includes a register name; sequentially judging each of the function statements including the register name, and performing an elimination process on the created binary tree to remove the register name from the binary tree in a case that the function statement includes a right child end tag of the binary tree, to generate a simplest binary tree; and generating a function statement in high-level language based on the simplest binary tree. All function statements can be read at a time and multiple reading and writing are avoided in the invention.

Abstract: A method and a system for register clearing in data flow analysis in decompilation are provided. The method includes: reading all function statements in a code file; sequentially judging each of the read function statements, and creating a binary tree and inputting the function statement into the binary tree in a case that the function statement includes a register name; sequentially judging each of the function statements including the register name, and performing an elimination process on the created binary tree to remove the register name from the binary tree in a case that the function statement includes a right child end tag of the binary tree, to generate a simplest binary tree; and generating a function statement in high-level language based on the simplest binary tree. All function statements can be read at a time and multiple reading and writing are avoided in the invention.