gtpi1m2h | System Installation Support Reference |
User exit routine UCCCDEB is invoked by the C function trace exception routine (CTR0). The ISO-C user can use UCCCDEB to customize the C function trace environment.
General Conditions at Entry
The registers at entry to UCCCDEB are:
System Conditions at Entry
Programming Considerations at Entry
See User Exit Routines - Common Programming Considerations.
You can issue the SETTC macro or the ENATC macro from the CDEB user exit. However, the SETTC and ENATC macros use register 15 to provide return code information. This use of register 15 conflicts with the user exit usage of register 15 for addressing. Therefore, before you issue the SETTC macro or the ENATC macro from the CDEB user exit, establish addressability using a base register other than 15.
Programming Considerations on Return
See User Exit Routines - Common Return Conditions.
General Conditions on Return