System for analyzing and debugging embedded software through dynamic and interactive use of code markers
US5450586A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1992 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Apr 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/3644
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for inserting code markers for observing indications (external to the microprocessor upon which the software operates) of the occurrence of an event in the execution of the software. Additional instructions or markers are added to the software to be debugged to produce simple, encoded, memory references to otherwise unused memory or I/O locations that will always be visible to a logic analyzer as bus cycles. Although the code markers cause a minimal intrusion in the underlying software, they make tracing events by a conventional logic analyzer much simpler and allow for performance evaluations in manners not heretofore possible. The inserted code markers provide a method of dynamically extracting information from a running host or real-time "black box" embedded system under test using simple low intrusion print statements, encoded I/O writes on procedure entries and exits, and/or an interface to service calls and the like which writes out the passed parameters. The code markers are inserted at compile time or interactively during the debug session to make visible critical points in the code execution, such as function calls, task creation and semaphore operations, so as to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.