perf tools: Fix report -F symbol_to for data without branch info
authorJiri Olsa <jolsa@kernel.org>
Thu, 16 Oct 2014 14:07:04 +0000 (16:07 +0200)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 29 Oct 2014 12:28:30 +0000 (10:28 -0200)
commit38cdbd39ddf39c1284d54c4b7fe04db80ce97d04
treee3af1e46ec97fa95f1ad84798e197d4e5cf089ac
parent428560e762601d1248359052361322b71561c093
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>
tools/perf/util/sort.c