From cb71f7d43ece3d5a4f400f510c61b2ec7c9ce9a1 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Fri, 10 Jan 2020 16:15:37 +0100 Subject: libperf: Setup initial evlist::all_cpus value Jann Horn reported crash in perf ftrace because evlist::all_cpus isn't initialized if there's evlist without events, which is the case for perf ftrace. Adding initial initialization of evlist::all_cpus from given cpus, regardless of events in the evlist. Fixes: 7736627b865d ("perf stat: Use affinity for closing file descriptors") Reported-by: Jann Horn Signed-off-by: Jiri Olsa Acked-by: Andi Kleen Cc: Alexander Shishkin Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20200110151537.153012-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/perf/evlist.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'tools/lib') diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c index ae9e65aa2491..5b9f2ca50591 100644 --- a/tools/lib/perf/evlist.c +++ b/tools/lib/perf/evlist.c @@ -164,6 +164,9 @@ void perf_evlist__set_maps(struct perf_evlist *evlist, evlist->threads = perf_thread_map__get(threads); } + if (!evlist->all_cpus && cpus) + evlist->all_cpus = perf_cpu_map__get(cpus); + perf_evlist__propagate_maps(evlist); } -- cgit v1.2.3-59-g8ed1b