Commit-ID: 38cdbd39ddf39c1284d54c4b7fe04db80ce97d04
Gitweb: http://git.kernel.org/tip/38cdbd39ddf39c1284d54c4b7fe04db80ce97d04
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Thu, 16 Oct 2014 16:07:04 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 29 Oct 2014 10:28:30 -0200
perf tools: Fix report -F symbol_to for data without branch info
The branch field sorting code assumes hist_entry::branch_info is
allocated, which is wrong and following perf session ends up with report
segfault.
$ perf record ls
$ perf report -F symbol_to
perf: Segmentation fault
Checking that hist_entry::branch_info is valid and display "N/A" string
in snprint callback if it's not.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1413468427-31049-5-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/sort.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 0c68af8..57047c0 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -413,8 +413,13 @@ sort__sym_from_cmp(struct hist_entry *left, struct hist_entry *right)
static int64_t
sort__sym_to_cmp(struct hist_entry *left, struct hist_entry *right)
{
- struct addr_map_symbol *to_l = &left->branch_info->to;
- struct addr_map_symbol *to_r = &right->branch_info->to;
+ struct addr_map_symbol *to_l, *to_r;
+
+ if (!left->branch_info || !right->branch_info)
+ return cmp_null(left->branch_info, right->branch_info);
+
+ to_l = &left->branch_info->to;
+ to_r = &right->branch_info->to;
if (!to_l->sym && !to_r->sym)
return _sort__addr_cmp(to_l->addr, to_r->addr);
@@ -434,10 +439,14 @@ static int hist_entry__sym_from_snprintf(struct hist_entry *he, char *bf,
static int hist_entry__sym_to_snprintf(struct hist_entry *he, char *bf,
size_t size, unsigned int width)
{
- struct addr_map_symbol *to = &he->branch_info->to;
- return _hist_entry__sym_snprintf(to->map, to->sym, to->addr,
- he->level, bf, size, width);
+ if (he->branch_info) {
+ struct addr_map_symbol *to = &he->branch_info->to;
+
+ return _hist_entry__sym_snprintf(to->map, to->sym, to->addr,
+ he->level, bf, size, width);
+ }
+ return repsep_snprintf(bf, size, "%-*.*s", width, width, "N/A");
}
struct sort_entry sort_dso_from = {
--
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