From: Wei Li liwei391@huawei.com
commit 783fed2f35e2a6771c8dc6ee29b8c4b9930783ce upstream.
In __cmd_record(), when receiving SIGINT(ctrl + c), a 'done' flag will be set and the event list will be disabled by evlist__disable() once.
While in auxtrace_record.read_finish(), the related events will be enabled again, if they are continuous, the recording seems to be endless.
If the intel_bts event is disabled, we don't enable it again here.
Note: This patch is NOT tested since i don't have such a machine with intel_bts feature, but the code seems buggy same as arm-spe and intel-pt.
Signed-off-by: Wei Li liwei391@huawei.com Cc: Jiri Olsa jolsa@redhat.com Cc: Tan Xiaojun tanxiaojun@huawei.com Cc: stable@vger.kernel.org # 5.4+ Link: http://lore.kernel.org/lkml/20200214132654.20395-3-adrian.hunter@intel.com [ahunter: removed redundant 'else' after 'return'] Signed-off-by: Adrian Hunter adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/perf/arch/x86/util/intel-bts.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/tools/perf/arch/x86/util/intel-bts.c +++ b/tools/perf/arch/x86/util/intel-bts.c @@ -420,9 +420,12 @@ static int intel_bts_read_finish(struct struct evsel *evsel;
evlist__for_each_entry(btsr->evlist, evsel) { - if (evsel->core.attr.type == btsr->intel_bts_pmu->type) + if (evsel->core.attr.type == btsr->intel_bts_pmu->type) { + if (evsel->disabled) + return 0; return perf_evlist__enable_event_idx(btsr->evlist, evsel, idx); + } } return -EINVAL; }