Declare a Programmed Breakpoint in a PL/I Program

A PL/I program with a programmed breakpoint must be coded to define the entry point as passing parameters in Assembler fashion, as shown next:

DCL PBP ENTRY OPTIONS(ASSEMBLER);

Once this is done, code the calls in the usual manner.

Example

WRITE_RESPONSE:
  RESPONSE = ERROR CODE;
  CALL PBP ('WRITE_RESPONSE',RESPONSE,ADDR(REC_SIZE));

At this programmed breakpoint, the breakpoint display shows the following data areas:

The characters WRITE_RESPONSE tell you which programmed breakpoint (if many was coded) is being executed
The first 16 bytes of the field named RESPONSE
The full word that contains the address of the field named REC_SIZE

Note: If you do not include parameters in the CALL statement, a programmed breakpoint still occurs but no data is displayed.