[PATCH v2 6/8] perf tools: Avoid repeated failing search for debuginfo

[Namhyung Kim <namhyung@kernel.org>]

If dso has no debuginfo, dso__find_dbginfo_type() may repeat the same
search for available types.  Let's add a new field (debuginfo_searched)
not to do it.

Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/dso.c |  4 ++++
 tools/perf/util/dso.h | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index c765c9b80e957871..f7a786e0c3cf6a29 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -2129,6 +2129,10 @@ void dso__find_dbginfo_type(struct dso *dso)
 	if (dso__dbginfo_type(dso) != DSO_BINARY_TYPE__NOT_FOUND)
 		return;
 
+	if (dso__debuginfo_searched(dso))
+		return;
+	dso__set_debuginfo_searched(dso);
+
 	for (type = dbginfo_types; *type != DSO_BINARY_TYPE__NOT_FOUND; type++) {
 		path = dso__get_filename(dso, "", &decomp, *type);
 		if (path == NULL)
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 45c4954d5eaf9ffa..3f08d45e7f53a508 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -349,6 +349,7 @@ DECLARE_RC_STRUCT(dso) {
 	u8		 short_name_allocated:1;
 	u8		 long_name_allocated:1;
 	u8		 is_64_bit:1;
+	u8		 debuginfo_searched:1;
 	bool		 sorted_by_name;
 	bool		 loaded;
 	u8		 rel;
@@ -1019,6 +1020,16 @@ static inline void dso__set_dbginfo_type(struct dso *dso, enum dso_binary_type b
 
 void dso__find_dbginfo_type(struct dso *dso);
 
+static inline bool dso__debuginfo_searched(const struct dso *dso)
+{
+	return RC_CHK_ACCESS(dso)->debuginfo_searched;
+}
+
+static inline void dso__set_debuginfo_searched(struct dso *dso)
+{
+	RC_CHK_ACCESS(dso)->debuginfo_searched = 1;
+}
+
 bool dso__is_object_file(const struct dso *dso);
 
 void dso__free_a2l(struct dso *dso);
-- 
2.55.0