diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2014-10-16 16:07:04 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-10-29 10:28:30 -0200 |
| commit | 38cdbd39ddf39c1284d54c4b7fe04db80ce97d04 (patch) | |
| tree | e3af1e46ec97fa95f1ad84798e197d4e5cf089ac /tools/perf/util/sort.c | |
| parent | 428560e762601d1248359052361322b71561c093 (diff) | |
| download | lwn-38cdbd39ddf39c1284d54c4b7fe04db80ce97d04.tar.gz lwn-38cdbd39ddf39c1284d54c4b7fe04db80ce97d04.zip | |
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@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1413468427-31049-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/sort.c')
| -rw-r--r-- | tools/perf/util/sort.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 0c68af83e7dd..57047c0a247c 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 = { |