Accession Number : AD0692616

Title :   POST MORTEM PROGRAM FAILURE ANALYSIS IN A TIME-SHARING ENVIRONMENT,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH INFORMATION SCIENCES LAB

Personal Author(s) : Bayer,Rudolf

Report Date : JUN 1969

Pagination or Media Count : 23

Abstract : As background a brief review is given of post mortem program failure analysis (PMA) as implemented on second generation computer systems. Then the impact of some special characteristics of a time-sharing environment (TSE) on PMA is discussed, namely: continuous service to many users, sharing of programs and data, dynamic relocation, symbolic addressing, and elaborate protection schemes. General design principles for PMA operating within the framework of a deceased program are established, and some specific advantages due to the TSE are pointed out. Implications for the design of the operating system and the hardware of a TSE are derived, namely, the need for a symbolic instruction counter of a symbolic page address register is demonstrated, and necessary more general protection mechanisms are proposed. (Author)

Descriptors :   (*TIME SHARING, COMPUTER PROGRAMMING), (*COMPUTER PROGRAMMING, CORRECTIONS), PROTECTION, ERRORS, ANALYSIS, SYMPOSIA

Subject Categories : Computer Programming and Software
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE