Method and apparatus for tracing unpredictable execution flows i

Details Method and apparatus for tracing unpredictable execution flows i Method and apparatus for tracing unpredictable execution flows i

1994-12-19

1998-09-01

Treat, William M.

39518401, G06F 1134

Patent

active

058022724

ABSTRACT:
An operation of a processor is traced while fetching instructions from a memory to operate the processor. The tracing involves detecting an unpredictable fetching of instructions on the assumption that a predictable fetching can be reconstructed without any further input. The unpredictable fetching is identified as being due to either computable, conditional, or unanticipated events. Upon detecting the events, process control information, such as the next instruction to be fetched is recorded in a queue, and from the queue the information can be stored in a trace buffer. During reconstruction of the operation, the trace buffer, and the image including the instructions can be examined to analyze the real-time operation of the processor.

REFERENCES:
patent: 5321828 (1994-06-01), Phillips et al.
patent: 5499355 (1996-03-01), Krishnamohan et al.

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