| 摘要 |
PROBLEM TO BE SOLVED: To take-out operation information of a software before the software stall occurrence and to investigate the cause of the stall at the time of the occurrence of the software stall by providing a means which executes interruption during the operation of a central processing unit(CPU) and stores software operation information. SOLUTION: An interruption generating device 101 generates an interrupting signal at every prescribed time during the operation of CPU 105. When the processing of CPU 05 is moved to the processing by an instruction from an operation information storage indicating means 102, information required for solving the cause at the time of software stall occurrence, that is, software operation information 'c' is preserved from CPU 105 into an operation information storage device 104. Then, when the software stall occurs during the operation of CPU 105, the instruction for reading the contents of the operation information storage device 104 is given by way of an operation information display device 106 by the instruction of an operator so that information at the time of the software stall is read. |
