perf test: Fix hists related entries

That got broken by d3a72fd8187b ("perf report: Fix indentation of
dynamic entries in hierarchy"), by using the evlist in setup_sorting()
without checking if it is NULL, as done in some 'perf test' entries:

  $ find tools/ -name "*.c" | xargs grep 'setup_sorting(NULL);'
  tools/perf/tests/hists_output.c:      setup_sorting(NULL);
  tools/perf/tests/hists_output.c:      setup_sorting(NULL);
  tools/perf/tests/hists_output.c:      setup_sorting(NULL);
  tools/perf/tests/hists_output.c:      setup_sorting(NULL);
  tools/perf/tests/hists_output.c:      setup_sorting(NULL);
  tools/perf/tests/hists_cumulate.c:    setup_sorting(NULL);
  tools/perf/tests/hists_cumulate.c:    setup_sorting(NULL);
  tools/perf/tests/hists_cumulate.c:    setup_sorting(NULL);
  tools/perf/tests/hists_cumulate.c:    setup_sorting(NULL);
  $

Fix it.

Before:

  [root@jouet ~]# perf test
  <SNIP>
  15: Test matching and linking multiple hists                 : FAILED!
  16: Try 'import perf' in python, checking link problems      : Ok
  17: Test breakpoint overflow signal handler                  : Ok
  18: Test breakpoint overflow sampling                        : Ok
  19: Test number of exit event of a simple workload           : Ok
  20: Test software clock events have valid period values      : Ok
  21: Test object code reading                                 : Ok
  22: Test sample parsing                                      : Ok
  23: Test using a dummy software event to keep tracking       : Ok
  24: Test parsing with no sample_id_all bit set               : Ok
  25: Test filtering hist entries                              : FAILED!
  26: Test mmap thread lookup                                  : Ok
  27: Test thread mg sharing                                   : Ok
  28: Test output sorting of hist entries                      : FAILED!
  29: Test cumulation of child hist entries                    : FAILED!
  <SNIP>

After the patch the above failed tests complete successfully.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: d3a72fd8187b ("perf report: Fix indentation of dynamic entries in hierarchy")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 22 insertions, 15 deletions

diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 5888bfe9a193..4380a2858802 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -2635,25 +2635,14 @@ out:
         return ret;
 }
 
-int setup_sorting(struct perf_evlist *evlist)
+static void evlist__set_hists_nr_sort_keys(struct perf_evlist *evlist)
 {
-        int err;
-        struct hists *hists;
         struct perf_evsel *evsel;
-        struct perf_hpp_fmt *fmt;
-
-        err = __setup_sorting(evlist);
-        if (err < 0)
-                return err;
-
-        if (parent_pattern != default_parent_pattern) {
-                err = sort_dimension__add("parent", evlist);
-                if (err < 0)
-                        return err;
-        }
 
         evlist__for_each(evlist, evsel) {
-                hists = evsel__hists(evsel);
+                struct perf_hpp_fmt *fmt;
+                struct hists *hists = evsel__hists(evsel);
+
                 hists->nr_sort_keys = perf_hpp_list.nr_sort_keys;
 
                 /*
@@ -2667,6 +2656,24 @@ int setup_sorting(struct perf_evlist *evlist)
                                 hists->nr_sort_keys--;
                 }
         }
+}
+
+int setup_sorting(struct perf_evlist *evlist)
+{
+        int err;
+
+        err = __setup_sorting(evlist);
+        if (err < 0)
+                return err;
+
+        if (parent_pattern != default_parent_pattern) {
+                err = sort_dimension__add("parent", evlist);
+                if (err < 0)
+                        return err;
+        }
+
+        if (evlist != NULL)
+                evlist__set_hists_nr_sort_keys(evlist);
 
         reset_dimensions();