perf annotate browser: Allow navigation to called functions

I.e. when in the annotate TUI window, if Enter is pressed over an
assembly line with a 'callq' it will try to open another TUI window with
that symbol.

This is just a proof of concept and works only on x86_64, more work is
needed to support kernel modules, userland, other arches, etc, but
should already be useful as-is.

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-opyvskw5na3qdmkv8vxi3zbr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 39e3d382b2d8..24db9d2db7b4 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -114,7 +114,8 @@ static int hist_entry__tty_annotate(struct hist_entry *he, int evidx)
                                     print_line, full_paths, 0, 0);
 }
 
-static void hists__find_annotations(struct hists *self, int evidx)
+static void hists__find_annotations(struct hists *self, int evidx,
+                                    int nr_events)
 {
         struct rb_node *nd = rb_first(&self->entries), *next;
         int key = KEY_RIGHT;
@@ -137,7 +138,8 @@ find_next:
                 }
 
                 if (use_browser > 0) {
-                        key = hist_entry__tui_annotate(he, evidx, NULL, NULL, 0);
+                        key = hist_entry__tui_annotate(he, evidx, nr_events,
+                                                       NULL, NULL, 0);
                         switch (key) {
                         case KEY_RIGHT:
                                 next = rb_next(nd);
@@ -215,7 +217,8 @@ static int __cmd_annotate(void)
                         total_nr_samples += nr_samples;
                         hists__collapse_resort(hists);
                         hists__output_resort(hists);
-                        hists__find_annotations(hists, pos->idx);
+                        hists__find_annotations(hists, pos->idx,
+                                                session->evlist->nr_entries);
                 }
         }