EDF enables an application programmer to test a command-level
application program online without making any modifications to
the source program or the program preparation procedure.
EDF intercepts execution of the application program at certain
points and displays relevant information about the program at
these points.
There are seven places in the EXEC interface program (DFHEIP)
where the EDF can be called:
- When program initialization has been done, just before control is
passed to the application entry point
- When program termination is being done, just after control has
been received from the application
- Before a normal EXEC command is passed to its processor module
- When a normal EXEC command has returned to DFHEIP
- Before an EXEC CICS® GDS command is passed to its processor module
- When an EXEC CICS GDS command has returned to DFHEIP
- Before an EXEC CICS FEPI command is passed to its processor module
- When an EXEC CICS FEPI command has returned to DFHEIP
- At the end of a PL/I program.
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