Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

PROBE

This option controls the generation of stack probes which are extra instructions generated by the compiler whenever the stack can be extended by more than 2K bytes. This extra code causes a protection exception if there is not enough storage available on the stack.

Read syntax diagramSkip visual syntax diagram   .-PROBE---.
>>-+-NOPROBE-+-------------------------------------------------><
 
PROBE
Specifies that stack probes are generated.
NOPROBE
No generation of stack probes.

A program that requires considerable automatic storage, but is linked with an insufficient stack size, produces exceptions and might go into an infinite loop unless stack probes are generated. The presence of stack probes decreases performance in non-multithreading programs that are properly linked.


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