This topic describes one method of testing user-written SMF exit routines, the TESTEXIT procedure in SYS1.SAMPLIB. This procedure contains an assembler language source program (also named TESTEXIT) which attaches the data generator utility program (IEBDG) to create sample parameter lists for all user-written exit routines except IEFU29. (The TESTEXIT procedure creates the parameter list for the IEFU29 exit routine without using the data generator utility program.) The source program then calls each user-written exit routine being tested, and passes the appropriate parameter list to it.

Figure 1. TESTEXIT Input/Output and Control Flow

Before using the TESTEXIT procedure:

1. Fulfill the following user-written exit routine testing requirements:
   • Specify a user subpool (0-127) in all GETMAIN macro instructions included in the routines.
   • Provide a special SMFWTM macro instruction in all routines that use the macro.
   • Place the routines in a partitioned data set.
2. Obtain the TESTEXIT procedure from SYS1.SAMPLIB.
3. Modify the procedure to meet the installation's testing requirements.