dtrace showed matched probes but nothing in output on FreeBSD 9.1-RELEASE

[John Luk]

EDIT:Apologies for miss-sent mail.

Great! Seems that we're on the right way, I got the output below:

# dtrace -s ufunc.d -c ./a.out a.out
dtrace: script 'ufunc.d' matched 5 probes
^C

  foo                                                               1
  foo1                                                              1
  main                                                              1

through the inet_makeaddr was missing. I applied the patch with:

patch < libproc_sym_lookup-9.1.diff

Thanks again for your patch, Mark :)


Cheers,
spin6lock

2013/11/4 John Luk <john.37 at gmail.com>:
> Great! Seems that we're on the right way, I got the output below:
>
> # dtrace -s ufunc.d -c ./a.out a.out
> dtrace: script 'ufunc.d' matched 5 probes
> ^C
>
>   foo                                                               1
>   foo1                                                              1
>   main                                                              1
>
> through the inet_makeaddr was missing. I applied the patch with:
>
> patch < libproc_sym_lookup-9.1.diff
>
> Thanks again for your patch, Mark :)
>
> Cheers,
> spin6lock
>
>
> 2013/11/4 Mark Johnston <markj at freebsd.org>:
>> On Mon, Nov 04, 2013 at 12:11:55PM +0800, John Luk wrote:
>>> Thanks, Mark. But I still got nothing :(
>>> The line number of your patch wasn't match with mine, I patched it
>>> on hand. Was it because I was on an older version of src? The head
>>> of proc_sym.c shows:
>>>
>>>  $FreeBSD: release/9.1.0/lib/libproc/proc_sym.c 211184 2010-08-11
>>> 17:33:26Z rpaulo
>>>
>>> And the patch of mine is include below, is it correct?
>>
>> Sorry, I missed that you were on 9.1. The patch you pasted had a mistake
>> in it; can you instead try applying the patch here:
>>
>> http://people.freebsd.org/~markj/patches/libproc_sym_lookup-9.1.diff
>>
>> I created it against the 9.1 tree, so it should apply cleanly. I built and
>> installed the patched 9.1 libproc on a machine running head, and got the
>> expected behaviour:
>>
>>     mark at raichu: ~/src/dtrace/ufunc $ sudo dtrace -s ufunc.d -c ./test test
>>     dtrace: script 'ufunc.d' matched 9 probes
>>     dtrace: pid 11555 has exited
>>
>>       __do_global_dtors_aux                                             1
>>       foo                                                               1
>>       foo1                                                              1
>>       inet_makeaddr                                                     1
>>       main                                                              1
>>
>>     mark at raichu: ~/src/dtrace/ufunc $
>>
>> I don't think that this will be the final patch; checking for ET_EXEC to
>> determine whether to add a relocation offset seems a bit dubious; I'm
>> pretty sure it won't work for position-independent executables.
>>
>> Thanks,
>> -Mark
>>
>>>
>>> [...]
>>>