Re: [PATCH v2 2/2] perf annotate: Support interactive annotation of code without symbols

[Jin, Yao]

On 2/21/2020 10:45 PM, Jiri Olsa wrote:
> On Fri, Feb 21, 2020 at 10:46:08AM +0800, Jin Yao wrote:
>
> SNIP
>
> > Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
> > ---
> >   tools/perf/ui/browsers/hists.c | 51 +++++++++++++++++++++++++++++-----
> >   tools/perf/util/annotate.h     |  2 ++
> >   2 files changed, 46 insertions(+), 7 deletions(-)
> >
> > diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> > index f36dee499320..5144528b2931 100644
> > --- a/tools/perf/ui/browsers/hists.c
> > +++ b/tools/perf/ui/browsers/hists.c
> > @@ -2465,13 +2465,47 @@ do_annotate(struct hist_browser *browser, struct popup_action *act)
> >   	return 0;
> >   }
> >   
> > +static struct symbol *new_annotate_sym(u64 addr, struct map *map,
> > +				       struct annotation_options *opts)
> > +{
> > +	struct symbol *sym;
> > +	struct annotated_source *src;
> > +	char name[64];
> > +
> > +	snprintf(name, sizeof(name), "%-#.*lx", BITS_PER_LONG / 4, addr);
> > +
> > +	sym = symbol__new(addr,
> > +			  opts->annotate_dummy_len ?
> > +			  opts->annotate_dummy_len : ANNOTATION_DUMMY_LEN,
>
> I can't see annotate_dummy_len being set anywhere..

Yes, annotate_dummy_len is not set in this patch. Currently we just use 
the default value. While maybe in future we will provide a perf report 
option or set it in perf config. Now I just leave an interface here.

Thanks
Jin Yao

> jirka