When '--sort' is not set, 'perf mem report" will print a null pointer as
the output value of sort order, so fix it.
Example:
Before this patch:
$ perf mem report
# To display the perf.data header info, please use --header/--header-only
options.
#
# Samples: 18 of event 'cpu/mem-loads/pp'
# Total weight : 188
# Sort order : (null)
#
...
After this patch:
$ perf mem report
# To display the perf.data header info, please use --header/--header-only
options.
#
# Samples: 18 of event 'cpu/mem-loads/pp'
# Total weight : 188
#
...
Signed-off-by: Yunlong Song <yunlong.s...@huawei.com>
---
tools/perf/builtin-report.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 52f74e1..918ffef 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -304,7 +304,8 @@ static size_t hists__fprintf_nr_sample_events(struct hists
*hists, struct report
if (rep->mem_mode) {
ret += fprintf(fp, "\n# Total weight : %" PRIu64, nr_events);
- ret += fprintf(fp, "\n# Sort order : %s", sort_order);
+ if (sort_order)
+ ret += fprintf(fp, "\n# Sort order : %s", sort_order);
} else
ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64,
nr_events);
return ret + fprintf(fp, "\n#\n");
--
1.8.5.2
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