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:
/
proc
/
self
/
root
/
usr
/
share
/
systemtap
/
tapset
/
Filename :
choose_defined.stpm
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// Use the first parameter if it's @defined, otherwise use the second parameter @define choose_defined(value_if_defined, alternate) %( ( @defined(@value_if_defined) ? (@value_if_defined) : (@alternate) ) %)