Appeal No. 1997-1009
Application 08/033,731
The claims
Claims 1 and 9 are the only independent claims. Claim 1,
which is representative, reads as follows:
1. A selective method for capturing data in software
exception conditions (Major Errors) during the operation of a
data processing system, said system operating with at least
one task, each said task being endowed with a dedicated memory
space and being executed on instruction of a control program,
characterized in that it involves the steps of:
- defining dynamically for each task a data table (Task Data
Table 200), said data table being divided into a certain
number of subsets (Families 206)
- describing in each subset (Family 206) once at the beginning
of the task execution, the data fields, permanently defined in
the memory of the task, which are relevant for the Major
Errors anticipated by the task,
- describing in each subset (Family 206), in the course of the
execution of the task, the data fields, dynamically defined by
means of temporary memory allocation, which are relevant for
the exception condition (Major Error) anticipated by the task,
- selecting (403, 703) at each potential exception condition
in the code the appropriate subset (Family 206) in an
activation table (405 or 705) unique for each task,
- detecting, when it occurs, an exception condition (409, 709)
and identifying the faulty task,
- transferring the control of the operations to an error
handler code (Error Handler 411 or 711), said code being
endowed with a priority level higher than the level of the
tasks and being authorized to access the tasks memory,
- retrieving by the error handler code (Error Handler 411 or
711) the pertinent data fields from the descriptions (208)
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