2008/6/16 Adam Leventhal <[EMAIL PROTECTED]>:
> When you run dtrace -G it places nops at the probe sites. One of those nops
> will then be replaced with a trap instruction when the probe is enabled by
> your D script.
>
> I've been meaning to write up a blog entry describing how USDT works, but
> I've been afraid that only James McIlree and I would find it interesting.

Not at all! I've been staring at those 5 nops just recently trying to
work out why my Ruby-probes weren't firing, and I'm just about to
start writing up what I've managed to figure out... I'd definitely be
interested in the details.


Chris.
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