Information processing device, memory management method, and recording medium that ensure versatile memory management

An information processing device includes a memory and a control unit. The memory is employed as a program work area. The control unit switches between a first mode and a second mode; during the first mode, detects a resident program resident in the memory, and saves information identifying the resident program, as resident program information; and during the second mode, determines whether a requestor program, requesting allocation of the work area, is the resident program or not by comparing requestor-program identifying information with the resident program information, and in succession allocates in the memory respective work areas for one or more requestor programs determined to be resident programs.