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SubjectRe: [RFCv2] ftrace, perf: Adding support to use function trace
hi,
any feedback?

thanks,
jirka

On Mon, Dec 05, 2011 at 06:22:46PM +0100, Jiri Olsa wrote:
> hi,
> here's another version of perf support for function trace
> with filter. The changeset is working and hopefully is not
> introducing more bugs.. ;) still testing though..
>
> It's still marked RFC since I'm not sure there's better way to go
> with patches 2 and 10. Also not sure if the condition fixed by
> patch 7 was not intentional. The rest is fixed/updated version
> of the v1 changes.
>
> attached patches:
> 01/10 ftrace: Fix possible NULL dereferencing in __ftrace_hash_rec_update
> 02/10 ftrace: Change mcount call replacement logic
> 03/10 ftrace: Add enable/disable ftrace_ops control interface
> 04/10 ftrace, perf: Add open/close tracepoint perf registration actions
> 05/10 ftrace, perf: Add add/del tracepoint perf registration actions
> 06/10 ftrace, perf: Add support to use function tracepoint in perf
> 07/10 ftrace: Change filter/notrace set functions to return exit code
> 08/10 ftrace, perf: Distinguish ftrace function event field type
> 09/10 ftrace, perf: Add filter support for function trace event
> 10/10 ftrace, graph: Add global_ops filter callback for graph tracing
>
> v2 changes:
> 01/10 - keeping the old fix instead of adding hash_has_contents func
> I'll send separating patchset for this
> 02/10 - using different way to avoid the issue (3/9 in v1)
> 03/10 - using the way proposed by Steven for controling ftrace_ops
> (4/9 in v1)
> 06/10 - added check ensuring the ftrace:function event could be used by
> root only (7/9 in v1)
> 08/10 - added more description (8/9 in v1)
> 09/10 - changed '&&' operator to '||' which seems more suitable
> in this case (9/9 in v1)
>
> thanks for comments,
> jirka
> ---
> include/linux/ftrace.h | 18 +++-
> include/linux/ftrace_event.h | 9 +-
> include/linux/perf_event.h | 3 +
> kernel/trace/ftrace.c | 202 +++++++++++++++++++++++++++++------
> kernel/trace/trace.h | 11 ++-
> kernel/trace/trace_event_perf.c | 212 +++++++++++++++++++++++++++++-------
> kernel/trace/trace_events.c | 12 ++-
> kernel/trace/trace_events_filter.c | 116 ++++++++++++++++++-
> kernel/trace/trace_export.c | 53 ++++++++-
> kernel/trace/trace_kprobe.c | 8 +-
> kernel/trace/trace_syscalls.c | 18 +++-
> 11 files changed, 562 insertions(+), 100 deletions(-)


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