[dtrace-discuss] Arg1 doesn't hold return value in pid provider?

[Vladimir Marek]

> Functions that end in a tail-call to another function can report an
> incorrect return value in the arg1 variable. Take a look at the
> disassembly at the location where you're seeing the apparently invalid
> return values to  confirm that it's a tail-call.

Aaah, that exactly happened to me half a year ago, on the same t_*
functions. And I forgot it in the meantime. Would it be sensible to have
dtrace which would warn you when it detects tail-call optimized function
?

-- 
	Vlad
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