Hi James,
thx again for the help -- unfortunately I couldn't figure out how to
get at both of the descriptors on OS X. But I solved the original
problem the old (and hard) way without DTRACE, so no more urgent help
needed on this.
> The issue here is that syscall itself exposes
> kernel implementation details, so it's highly dependent on how your
> system is put together.
> Sounds like a 32-bit kernel. In that case, try using arg0 and arg1.
Nope, that's what I tried first (before knowing about the 64-bit
implementation issues). And it is actually a 64-bit kernel. But maybe
that's one of the things that will be fixed with OS X 10.6, when Apple
hopefully also cleans up the last standing 32-to-64-bit-transition
left-overs, or when this part of the DTRACE interface maybe once
stabilizes.
Thank you anyway!
Beat
Am 25.11.2008 um 16:31 schrieb James Carlson:
> Beat Vontobel writes:
>> Hi James,
>>
>> thanx for your quick reply!
>>
>>> printf("pipe(%d, %d) in %s\n", arg0 & 0xffffffff, arg0 >> 32,
>>
>> Unfortunately, the higher 32 bits are always 0 for me with this
>> approach, even though the lower 32 bits correctly hold the first of
>> the two file descriptors.
>
> Sounds like a 32-bit kernel. In that case, try using arg0 and arg1.
>
>> Did Apple maybe break something when they
>> integrated your code into OS X? :) (I know they broke some other
>> stuff
>> in dtrace, some of it intentionally... :) )
>
> I don't think so. The issue here is that syscall itself exposes
> kernel implementation details, so it's highly dependent on how your
> system is put together.
>
> Check out:
>
> http://wikis.sun.com/display/DTrace/Stability
>
> and try this:
>
> dtrace -ev -n syscall::pipe:return
>
> --
> James Carlson, Solaris Networking <[EMAIL PROTECTED]
> >
> Sun Microsystems / 35 Network Drive 71.232W Vox +1 781 442
> 2084
> MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442
> 1677
>
--
Beat Vontobel, CTO, MeteoNews AG
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