From: Changbin Du Date: Mon, 13 Mar 2017 08:31:48 +0000 (+0800) Subject: perf sort: Fix segfault with basic block 'cycles' sort dimension X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4b0b3aa6a2756e6115fdf275c521e4552a7082f3;p=openwrt%2Fstaging%2Fblogic.git perf sort: Fix segfault with basic block 'cycles' sort dimension 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 Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Peter Zijlstra 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 --- diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index f8f16c0e20b6..93f755ac60ca 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -846,6 +846,9 @@ static int hist_entry__mispredict_snprintf(struct hist_entry *he, char *bf, 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; } @@ -853,6 +856,8 @@ sort__cycles_cmp(struct hist_entry *left, struct hist_entry *right) 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,