4.4-stable review patch. If anyone has any objections, please let me know.
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From: Changbin Du changbin.du@intel.com
[ Upstream commit 4b0b3aa6a2756e6115fdf275c521e4552a7082f3 ]
Skip the sample which doesn't have branch_info to avoid segmentation fault:
The fault can be reproduced by:
perf record -a perf report -F cycles
Signed-off-by: Changbin Du changbin.du@intel.com Tested-by: Arnaldo Carvalho de Melo acme@redhat.com Cc: Andi Kleen ak@linux.intel.com Cc: Peter Zijlstra peterz@infradead.org Fixes: 0e332f033a82 ("perf tools: Add support for cycles, weight branch_info field") Link: http://lkml.kernel.org/r/20170313083148.23568-1-changbin.du@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/util/sort.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -604,6 +604,9 @@ static int hist_entry__mispredict_snprin static int64_t sort__cycles_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.cycles - right->branch_info->flags.cycles; } @@ -611,6 +614,8 @@ sort__cycles_cmp(struct hist_entry *left static int hist_entry__cycles_snprintf(struct hist_entry *he, char *bf, size_t size, unsigned int width) { + if (!he->branch_info) + return scnprintf(bf, size, "%-.*s", width, "N/A"); if (he->branch_info->flags.cycles == 0) return repsep_snprintf(bf, size, "%-*s", width, "-"); return repsep_snprintf(bf, size, "%-*hd", width,