perf hists: Introduce hist_entry__has_callchain() method

We'll use this helper more frequently when reworking
symbol_conf.use_callchain logic, where knowing if a hist_entry has
callchains is the important bit, so make going from hist_entry to hists
to evsel easier, compact.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-p6gioxkzpkpz71dtt4wcs36o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index f007a26..1a04615 100644 (file)
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -151,6 +151,12 @@ struct hist_entry {
        struct callchain_root   callchain[0]; /* must be last member */
 };
 
+static __pure inline bool hist_entry__has_callchains(struct hist_entry *he)
+{
+       const struct perf_evsel *evsel = hists_to_evsel(he->hists);
+       return evsel__has_callchain(evsel);
+}
+
 static inline bool hist_entry__has_pairs(struct hist_entry *he)
 {
        return !list_empty(&he->pairs.node);