提交 49f47443 编写于 作者: J Jiri Olsa 提交者: Arnaldo Carvalho de Melo

perf tools: Fix report -F abort 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 abort
  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: NJiri Olsa <jolsa@kernel.org>
Acked-by: NNamhyung 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/1413468427-31049-2-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 493c3031
......@@ -989,6 +989,9 @@ struct sort_entry sort_mem_dcacheline = {
static int64_t
sort__abort_cmp(struct hist_entry *left, struct hist_entry *right)
{
if (!left->branch_info || !right->branch_info)
return cmp_null(left->branch_info, right->branch_info);
return left->branch_info->flags.abort !=
right->branch_info->flags.abort;
}
......@@ -996,10 +999,15 @@ sort__abort_cmp(struct hist_entry *left, struct hist_entry *right)
static int hist_entry__abort_snprintf(struct hist_entry *he, char *bf,
size_t size, unsigned int width)
{
static const char *out = ".";
static const char *out = "N/A";
if (he->branch_info) {
if (he->branch_info->flags.abort)
out = "A";
else
out = ".";
}
if (he->branch_info->flags.abort)
out = "A";
return repsep_snprintf(bf, size, "%-*s", width, out);
}
......
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