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Status Future consideration
Workspace z/OS
Categories LE
Created by Guest
Created on Mar 19, 2017

Option to report silent exception handling in LE

During some performance analysis we discovered in CICS trace a huge amount of S0CA - decimal overflow - interrupts caught and recovered by Language Environment. These were caused by a simple ADD statement in a cobol program which runs in an ILC enclave with C programs. Because decimal overflow was not masked (in contrast to a pure cobol enclave) the resulting overflows were handled by language defined condition handling.

The overhead of this kind of exception handling is low and can be neglected as long there are only a few of them at run time. In our case the unintentional decimal overflows resulted from an undiscovered bug in the application program and we are glad that CICS and LE helped us to uncover the bug.
As far as I know, there is no way to monitor "silent" language defined condition handling with own user handlers. So it is very hard to diagnose such application issues.

I propose to provide new LE runtimeoptions to

- unconditional enable ILC program mask

- report the silent activity of LE system condition handlers, e.g RPTCOND(OFF|SUMMARY|LOG)

Idea priority Medium