[lttng-dev] newbie and kernel trace

[Stéphane ANCELOT]

Hi,
I have read the Documentation/trace/tracepoints.txt file.

I modified my code to acknowledge it.

I am again unable to list my tracepoints using lttng list . (I also 
tried lttng enable-channel before...).

So , only one step I have not made :
Is it mandatory to register the probe functions ???


Regards,
S.Ancelot




On 17/05/2013 17:13, Jérémie Galarneau wrote:
> Hi Stéphane,
>
> We're going to need more details than that. Which kernel version are you using?
> Can you see the other kernel events in your trace? If not, can you
> show us how you are setting up your session?
>
> Thanks,
> Jérémie
>
> On Fri, May 17, 2013 at 10:58 AM, Stéphane ANCELOT <sancelot at free.fr> wrote:
>> Hi,
>>
>> I am trying to reimplement LTTNG 2. in xenomai api.
>>
>> the main problem is that I do not sea any of my new events available in
>> lttng 2.
>>
>>
>> my kernel compiles fine and  here is what I done to set it up :
>>
>> file include/trace/events/pod.h :
>>
>> #undef TRACE_SYSTEM
>> #define TRACE_SYSTEM xenotrace
>>
>> #if !defined(_XENOTRACE_H) || defined(TRACE_HEADER_MULTI_READ)
>>
>> #define _XENOTRACE_H
>>
>> #include <linux/tracepoint.h>
>>
>>
>> TRACE_EVENT(    xn_nucleus_thread_init,
>>                  TP_PROTO(struct xnthread *thread,char *thread_name,xnflags_t
>> flags,const char *class,int prio),
>>                  TP_ARGS(thread,thread_name,flags,class,prio),
>>
>>                  TP_STRUCT__entry(
>>                   __field(struct xnthread *,thread)
>>                   __array(char ,thread_name,      XNOBJECT_NAME_LEN   )
>>                   __field(xnflags_t,flags)
>>                   __array(char,class,      XNOBJECT_NAME_LEN  )
>>                   __field(int,    prio                       )
>>                  ),
>>
>>                TP_fast_assign(
>>                 __entry->thread   = thread;
>>                 memcpy(__entry->thread_name,thread_name, XNOBJECT_NAME_LEN);
>>                 __entry->flags   = flags;
>>                 memcpy(__entry->class,class, XNOBJECT_NAME_LEN);
>>                 __entry->prio   = prio;
>>                  ),
>>
>>                 TP_printk("thread %p thread_name %s flags %lu class %s prio
>> %d",
>>                 __entry->thread, __entry->thread_name,
>> __entry->flags,__entry->class,
>>                 __entry->prio)
>> );
>>
>> #endif
>>
>> /* This part must be outside protection */
>> #include <trace/define_trace.h>
>>
>>
>>
>> in pod.h :
>> #define CREATE_TRACE_POINTS
>> #include <trace/events/pod.h>
>>
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>
>