gtpp1m0z | Program Development Support Reference |
The SFT debugging tool monitors the updating of selected file addresses during a specified file trace period. A trace period is defined by the following commands:
The ZTRCE command specifies the file addresses to be monitored. When the ZTHLT command (halt trace) is entered, the SFT dumps to the real-time tape the monitored records that were updated during the trace period. If a record was marked for monitoring but was not updated during the trace period, the SFT debugging tool does not dump that record to tape. Intermediate contents of a monitored record are not written to tape; only the contents at the end of the trace period are recorded.
The SFT debugging tool has an optional file address logging subfunction. If the logging subfunction is requested, the SFT debugging tool provides a list of the addresses of all file records that were updated during the trace period but not specified for monitoring when the ZTRCE command was entered. This log helps check for unanticipated file activity. If a record is filed more than once, its address appears the same number of times in the log. The log is written to tape in addition to the trace output requested with the ZTRCE command.
See TPF Operations for more information about the ZTRCE and ZTHLT commands.