CRE Programmer's Guide

CRE Services

Common Run-Time Environment (CRE) Programmer’s Guide—528146-004

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Native CRE Signals and Exceptions

For Guardian processes, the native CRE library provides a default signal handler for all

signals whose default action is not signal ignore. The signal handler takes all

appropriate actions, then terminates the process; it does not return control to its caller.

The default signal handler is set once at process initialization time. Any subsequent

calls to signal manipulation functions by the user can associate a different signal

handler with a given signal.

The native CRE library does not provide a default signal handler for OSS processes.

In standard math functions, the native CRE library provides only non-trapping variants

of those functions that can cause arithmetic faults. Arithmetic faults are dynamically

detected, and the native CRE takes all other appropriate actions, such as setting

errno and returning an appropriate value.

For details on signals and signal handlers, refer to the

Guardian Programmer’s Guide

OSS Programmer’s Guide.

Figure 2-16. Writing a CRE Error Message in the OSS Environment

21 7VST .VSD

Start

Write to file

associated with

File Descriptor 2

Write

Successful?

Write to

home terminal

(might fail)

Call PROCESS_STOP_

yes