Re: [9fans] dtrace for plan 9

[Roman Shaposhnik <roman@shaposhnik.org>]

On Mon, Nov 9, 2009 at 4:46 PM, ron minnich <rminnich@gmail.com> wrote:
> On Mon, Nov 9, 2009 at 4:33 PM, Nathaniel W Filardo <nwf@cs.jhu.edu> wrote:
>> On Mon, Nov 09, 2009 at 12:07:22AM +0000, dave.l@mac.com wrote:
>>>  yet too dangerous due to its possible unbounded runtime
>>
>> I keep hearing this brought up, but (while I am not an expert) AFAICT, the
>> runtime for each D hook should be strictly bounded by the number of
>> instructions lobbed in, since D does not (without root override, perhaps?)
>> support backwards jumps.  Am I mistaken in my understanding of DTrace?
>
> You are right. I don't think runtime is unbounded. At the same time,
> I'm still trying to locate example scripts to get an idea of how
> complex it is. I'm talking to people at sun to get a handle on the
> question.

What exactly do you want to know? I worked with DTrace quite extensively.

Thanks,
Roman.