CONVERSION DEVICE, CONVERSION METHOD AND CONVERSION PROGRAM

PROBLEM TO BE SOLVED: To convert a program to prevent the occurrence of a buffer overflow.SOLUTION: A conversion device includes: a detection part for detecting a branch instruction showing jumping to the address of jump destination shown by an operand corresponding to the branch instruction among branch instructions included in a program to be converted; and an instruction sentence insertion part for inserting, into the place of the program in which the branch instruction detected by the detection part is included, an instruction sentence showing processing of determining whether or not the address of the jump destination is a predetermined address, and executing the branch instruction when the address of the jump destination is a predetermined address, and not executing the branch instruction when the address of the jump destination is not the predetermined address.