Commit-ID: 428560e762601d1248359052361322b71561c093 Gitweb: http://git.kernel.org/tip/428560e762601d1248359052361322b71561c093 Author: Jiri Olsa <jo...@kernel.org> AuthorDate: Thu, 16 Oct 2014 16:07:03 +0200 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 29 Oct 2014 10:28:20 -0200
perf tools: Fix report -F mispredict 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 mispredict 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 <jo...@kernel.org> Acked-by: Namhyung Kim <namhy...@kernel.org> Cc: Andi Kleen <a...@linux.intel.com> Cc: Corey Ashford <cjash...@linux.vnet.ibm.com> Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Ingo Molnar <mi...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Link: http://lkml.kernel.org/r/1413468427-31049-4-git-send-email-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/sort.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 9bcdb57..0c68af8 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -471,11 +471,13 @@ struct sort_entry sort_sym_to = { static int64_t sort__mispredict_cmp(struct hist_entry *left, struct hist_entry *right) { - const unsigned char mp = left->branch_info->flags.mispred != - right->branch_info->flags.mispred; - const unsigned char p = left->branch_info->flags.predicted != - right->branch_info->flags.predicted; + unsigned char mp, p; + if (!left->branch_info || !right->branch_info) + return cmp_null(left->branch_info, right->branch_info); + + mp = left->branch_info->flags.mispred != right->branch_info->flags.mispred; + p = left->branch_info->flags.predicted != right->branch_info->flags.predicted; return mp || p; } @@ -483,10 +485,12 @@ static int hist_entry__mispredict_snprintf(struct hist_entry *he, char *bf, size_t size, unsigned int width){ static const char *out = "N/A"; - if (he->branch_info->flags.predicted) - out = "N"; - else if (he->branch_info->flags.mispred) - out = "Y"; + if (he->branch_info) { + if (he->branch_info->flags.predicted) + out = "N"; + else if (he->branch_info->flags.mispred) + out = "Y"; + } return repsep_snprintf(bf, size, "%-*.*s", width, width, out); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
