[PATCH v5 3/3] perf report: Support hotkey 'a' on address for annotation

[Jin Yao <yao.jin@linux.intel.com>]

In previous patch, we have supported the annotation functionality
even without symbols.

For this patch, it supports the hotkey 'a' on address in report
view. Note that, for branch mode, we only support the annotation
for "branch to" address.

 v5:
 ---
 New patch in v5.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
 tools/perf/ui/browsers/hists.c | 47 ++++++++++++++++++++++++++--------
 1 file changed, 36 insertions(+), 11 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 2f07680559c4..7f9a8fd24e5c 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -3061,21 +3061,46 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
 				continue;
 			}
 
-			if (browser->selection == NULL ||
-			    browser->selection->sym == NULL ||
-			    browser->selection->map->dso->annotate_warned)
+			if (!browser->selection ||
+			    !browser->selection->map ||
+			    !browser->selection->map->dso ||
+			    browser->selection->map->dso->annotate_warned) {
 				continue;
+			}
 
-			if (symbol__annotation(browser->selection->sym)->src == NULL) {
-				ui_browser__warning(&browser->b, delay_secs * 2,
-						    "No samples for the \"%s\" symbol.\n\n"
-						    "Probably appeared just in a callchain",
-						    browser->selection->sym->name);
-				continue;
+			if (!browser->selection->sym) {
+				if (!browser->he_selection)
+					continue;
+
+				if (sort__mode == SORT_MODE__BRANCH) {
+					bi = browser->he_selection->branch_info;
+					if (!bi || !bi->to.ms.map)
+						continue;
+
+					actions->ms.sym = new_annotate_sym(bi->to.al_addr,
+									   bi->to.ms.map);
+					actions->ms.map = bi->to.ms.map;
+				} else {
+					actions->ms.sym = new_annotate_sym(browser->he_selection->ip,
+									   browser->selection->map);
+					actions->ms.map = browser->selection->map;
+				}
+
+				if (!actions->ms.sym)
+					continue;
+			} else {
+				if (symbol__annotation(browser->selection->sym)->src == NULL) {
+					ui_browser__warning(&browser->b, delay_secs * 2,
+						"No samples for the \"%s\" symbol.\n\n"
+						"Probably appeared just in a callchain",
+						browser->selection->sym->name);
+					continue;
+				}
+
+				actions->ms.map = browser->selection->map;
+				actions->ms.sym = browser->selection->sym;
 			}
 
-			actions->ms.map = browser->selection->map;
-			actions->ms.sym = browser->selection->sym;
 			do_annotate(browser, actions);
 			continue;
 		case 'P':
-- 
2.17.1