DFHTRP is responsible for handling all requests for trace services that are made by using the routine addressed by CSATRNAC in the CICS® common system area (CSA).
Some parts of the CICS AP domain invoke DFHTRP to record trace information. This is achieved by use of the DFHTR, DFHTRACE, or DFHLFM macro.
DFHTRP converts all requests for recording trace entries into TRACE_PUT calls to the trace domain. All requests for changing the various trace flags that control tracing are converted into KEDD format calls to the kernel domain.
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