Abstract: Method and apparatus provide for collecting execution status data in the execution of an object program. In compiling a source program described in a structured format to an object program, a PROBE instruction for starting a data collecting program for collecting the execution status data, with a block identification number in an operand field thereof, is inserted at a position of an exit sentence indicating an exit of the program block. When the PROBE instruction is registered in an instruction execution register of an execution unit during a period of the execution of the object program, the data collecting program is started to collect the execution status data, which is then stored in a store table.

Abstract: In a computer system for parallelly executing a plurality of tasks by sharing a plurality of resources in a data base of a computer, a use sequence of the resources to be used by each task is inputted to the computer prior to the execution of the tasks. A possibility of deadlock due to sharing of common resources amojng the tasks is checked based on the information on the use sequence, and a deadlock avoidance information table is prepared. When the task issues a start request, the deadlock avoidance information table is referred and the start of the task which has the possibility of the deadlock is delayed.