[PATCH 3/4] perf annotate: Fix missing setting nr samples on source_line

[Taeung Song]

If using --show-total-period with -l,
disasm__calc_percent() use a 'samples' array of source_line.
But samples[evidx].nr is always zero so print 0 values as below.

Before:
    $ perf annotate --stdio -l --show-total-period
...
       0 :        400816:       push   %rbp
       0 :        400817:       mov    %rsp,%rbp
       0 :        40081a:       mov    %edi,-0x24(%rbp)
       0 :        40081d:       mov    %rsi,-0x30(%rbp)
       0 :        400821:       mov    -0x24(%rbp),%eax
       0 :        400824:       mov    -0x30(%rbp),%rdx
       0 :        400828:       mov    (%rdx),%esi
       0 :        40082a:       mov    $0x0,%edx
...

The reason is that in symbol__get_source_line() did't set
number of samples into a memeber variable 'nr' of samples
of source_line.

So fix it for correct number of samples
when using --show-total-period option as below.

After:
    $ perf annotate --stdio -l --show-total-period
...
       3 :        400816:       push   %rbp
       4 :        400817:       mov    %rsp,%rbp
       0 :        40081a:       mov    %edi,-0x24(%rbp)
       0 :        40081d:       mov    %rsi,-0x30(%rbp)
       1 :        400821:       mov    -0x24(%rbp),%eax
       2 :        400824:       mov    -0x30(%rbp),%rdx
       0 :        400828:       mov    (%rdx),%esi
       1 :        40082a:       mov    $0x0,%edx
...

Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Jiri Olsa <jo...@redhat.com>
Signed-off-by: Taeung Song <treeze.tae...@gmail.com>
---
 tools/perf/util/annotate.c | 6 ++++--
 tools/perf/util/annotate.h | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 9bb43cd..63130ec 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1659,7 +1659,7 @@ static int symbol__get_source_line(struct symbol *sym, 
struct map *map,
        start = map__rip_2objdump(map, sym->start);
 
        for (i = 0; i < len; i++) {
-               u64 offset;
+               u64 offset, nr_samples;
                double percent_max = 0.0;
 
                src_line->nr_pcnt = nr_pcnt;
@@ -1668,12 +1668,14 @@ static int symbol__get_source_line(struct symbol *sym, 
struct map *map,
                        double percent = 0.0;
 
                        h = annotation__histogram(notes, evidx + k);
+                       nr_samples = h->addr[i];
                        if (h->sum)
-                               percent = 100.0 * h->addr[i] / h->sum;
+                               percent = 100.0 * nr_samples / h->sum;
 
                        if (percent > percent_max)
                                percent_max = percent;
                        src_line->samples[k].percent = percent;
+                       src_line->samples[k].nr = nr_samples;
                }
 
                if (percent_max <= 0.5)
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 09776b5..948aa8e 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -98,7 +98,7 @@ struct cyc_hist {
 struct source_line_samples {
        double          percent;
        double          percent_sum;
-       double          nr;
+       u64             nr;
 };
 
 struct source_line {
-- 
2.7.4