On Fri, Jan 23, 2015 at 09:57:53AM +0800, Wang Nan wrote:
> On 2015/1/22 21:27, Jiri Olsa wrote:
> > On Thu, Jan 22, 2015 at 01:36:43PM +0800, Wang Nan wrote:
> >> (If Steven Rostedt accept the previous patch which introduce a priv
> >> field to 'struct format_field', we can use a relative simple method
> >> for name conversion. If not , perf must track name conversion by
> >> itself.)
> >>
> >> Some parameters of syscall tracepoints named as 'nr', 'event', etc.
> >> When dealing with them, perf convert to ctf meets some problem:
> >>
> >> 1. If a parameter with name 'nr', it will duplicate syscall's
> >> common field 'nr'. One such syscall is io_submit().
> >>
> >> 2. If a parameter with name 'event', it is denied to be inserted
> >> because 'event' is a babeltrace keywork. One such syscall is
> >> epoll_ctl.
> >>
> >> This patch appends '_dupl_X' suffix to avoid problem 1, prepend a '_'
> >> prefix to avoid problem 2.
> >
> > I've got compilation error:
> >
> > util/data-convert-bt.c: In function ‘event_class_add_field’:
> > util/data-convert-bt.c:629:2: error: suggest parentheses around assignment
> > used as truth value [-Werror=parentheses]
> > while (t = bt_ctf_event_class_get_field_by_name(event_class, name)) {
> >
> > what's your gcc version? mine's caught that..
> >
>
> I also curious why you got so many Werror problems I'm not ever seen,
> until I found a '-w' in my gcc options, which is introduced by your commit
>
> 47810c1d429bc690e1f5e9467697538921962171: perf data: Disable Werror convert
> object.
>
> I'll revert that commit in my tree.
that one was to workaround the regression in babeltrace,
I'm now using sane babeltrace HEAD as advertized by Jeremie:
"In the meantime, testing against Babeltrace master 3baf0856 should be alright."
jirka
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