Address Flow Change Tracing Mechanism
Original Publication Date: 1987-Jan-01
Included in the Prior Art Database: 2005-Jan-31
A technique is described whereby an address flow change tracing mechanism is used to trace computer program branch operations for diagnostic purposes, and provides microcode tracing without using large amounts of storage. Since the technique described herein utilizes a microcode trace requiring very little storage, the time required to transfer the trace to a host is reduced. The concept centers around the fact that only changes in the program flow are stored. This enhances the ability to trace a program for unwanted or incorrect branches. In computer technology, having the ability to trace a program, either for debugging purposes or for analysis and enhancement activity, requires the incorporation of a trace mechanism.