Thanks. This is quite interesting. I wonder where one goes to learn about what
kernel symbols are available in Mac OS X...?
On Jun 21, 2011, at 12:17 PM, Adam Leventhal <a...@delphix.com> wrote:
> Hey Eric,
>
> There's not a great way to do it, but you can use a tool like mdb(1)
> on Solaris, or a simple DTrace script:
>
> ---8<--- dtrace_probes.d ---8<---
>
> #!/usr/sbin/dtrace -s
>
> #pragma D option quiet
>
> int i;
>
> tick-100
> /i >= `dtrace_nprobes/
> {
> exit(0);
> }
>
> tick-100
> { printf("%4d %10s %20s %20s %10s %s\n", i,
> stringof(`dtrace_probes[i]->dtpr_provider->dtpv_name),
> stringof(`dtrace_probes[i]->dtpr_mod),
> stringof(`dtrace_probes[i]->dtpr_func),
> stringof(`dtrace_probes[i]->dtpr_name),
> `dtrace_probes[i]->dtpr_ecb != NULL ? "enabled" : "disabled");
> i++
> }
>
> ---8<--- dtrace_probes.d ---8<---
>
> 0 dtrace BEGIN disabled
> 1 dtrace END disabled
> 2 dtrace ERROR enabled
> 3 python589 libpython2.6.so.1.0 PyEval_EvalFrameEx
> function-entry disabled
> 4 python589 libpython2.6.so.1.0 dtrace_entry
> function-entry disabled
>
> Unfortunately this doesn't work on Mac OS X:
>
> # dtrace -n 'BEGIN{ trace(`dtrace_nprobes); }'
> dtrace: invalid probe specifier BEGIN{ trace(`dtrace_nprobes); }: in
> action list: failed to resolve `dtrace_nprobes: Unknown symbol name
>
> Some kernel symbols seem to be available; perhaps someone more
> familiar with Mac OS X can get this script running over there.
>
> Adam
>
> On Tue, Jun 21, 2011 at 5:01 AM, Eric Gorr <mail...@ericgorr.net> wrote:
>> If it matters, I am using Mac OS X 10.6.x.
>>
>> Let's say that I open a terminal window, enabled a few probes, and start
>> collecting data.
>>
>> From a different terminal window can I ask DTrace what probes have been
>> enabled? If so, how?
>>
>> Thank you.
>> _______________________________________________
>> dtrace-discuss mailing list
>> dtrace-discuss@opensolaris.org
>>
>
>
>
> --
> Adam Leventhal, Delphix
> http://dtrace.org/blogs/ahl
>
> 275 Middlefield Road, Suite 50
> Menlo Park, CA 94025
> http://www.delphix.com
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