[tip:perf/core] perf script: Use thread__find_symbol() instead of ad-hoc equivalent

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  cc5f02f2be8d3354986bad5703ee8a983872f140
Gitweb:     https://git.kernel.org/tip/cc5f02f2be8d3354986bad5703ee8a983872f140
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 24 Apr 2018 11:32:30 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 26 Apr 2018 13:47:08 -0300

perf script: Use thread__find_symbol() instead of ad-hoc equivalent

In dc323ce8e72d ("perf script: Enable printing of branch stack") it
first tries to find the map for an address, then the symbol in the DSO
backing that map, for that address, well, this is what
thread__find_symbol() does, so just use it and make the code shorter.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-03nx3aod955yqnf9l06im28j@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-script.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 5ec1c73bbfaf..ffd02faee87b 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -764,13 +764,8 @@ static int perf_sample__fprintf_brstacksym(struct perf_sample *sample,
 		from = br->entries[i].from;
 		to   = br->entries[i].to;
 
-		thread__find_map(thread, sample->cpumode, from, &alf);
-		if (alf.map)
-			alf.sym = map__find_symbol(alf.map, alf.addr);
-
-		thread__find_map(thread, sample->cpumode, to, &alt);
-		if (alt.map)
-			alt.sym = map__find_symbol(alt.map, alt.addr);
+		thread__find_symbol(thread, sample->cpumode, from, &alf);
+		thread__find_symbol(thread, sample->cpumode, to, &alt);
 
 		printed += symbol__fprintf_symname_offs(alf.sym, &alf, fp);
 		if (PRINT_FIELD(DSO)) {