[PATCH 13/19] perf tool: Skip symbols in exclude list while printing callchain

David Ahern
2013-08-08T02:53:50Z

Leverage new exclude symbol list to allow user to not see certain functions
in a backtrace. For example repeating patterns like:
do_select core_sys_select sys_select
can be reduced to just sys_select when dumping callchains, consuming less
real estate on the screen while still conveying the essential message - the
process is in a select call.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
---
tools/perf/util/session.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 5a89964..0eada12 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1522,6 +1522,9 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
if (!node)
break;

+ if (symbol__is_excluded(node->sym))
+ goto next;
+
if (print_ip)
printf("%c%16" PRIx64, s, node->ip);

@@ -1543,9 +1546,10 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
if (!print_oneline)
printf("\n");

- callchain_cursor_advance(&callchain_cursor);
-
stack_depth--;
+
+next:
+ callchain_cursor_advance(&callchain_cursor);
}

} else {
--
1.7.10.1