BAM internal trace records

The trace record types that may be created when the BAM internal trace facility is active are:

ENTRY records that describe an entry into a module (CSECT)
EXIT records that describe an exit from a module (CSECT)
Numbered records, from 1 to 8, that describe optional trace records inserted by IBM service to gather additional diagnostic information.

The content of the trace records is as follows:

All trace records contain the timestamp to indicate the record's time of creation.
All trace records running under a TCB contain the TCB address, extracted from PSATOLD.
All trace records running under an SRB contain zeros instead of a TCB address. This value is extracted from PSATOLD.
All trace records contain the CSECT name, for example, IGG019V8, IGG019V9, and so on.
All trace records contain the type identifier, for example, ENTRY or EXIT.
All trace type ENTRY records contain the caller's return address. Other trace types may contain optional data.

The following example shows EXIT and ENTRY type trace records:

TRACE:     TIME    TCB     RET/DATA   CSECT    TYPE  
17:34:54.882497  009E68C8  00009F28  IGG019BB  EXIT 
17:34:54.880990  009E68C8  00009F28  IGG019BA  EXIT 
17:34:54.880990  009E68C8  50020D42  IGG019BB  ENTRY