4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit fb50c09e923870a358d68b0d58891bd145b8d7c7 ]
Adam reported a record command crash for simple session like:
$ perf record -e cpu-clock ls
with following backtrace:
Program received signal SIGSEGV, Segmentation fault. 3543 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]); (gdb) bt #0 perf_event__synthesize_event_update_unit #1 0x000000000051e469 in perf_event__synthesize_extra_attr #2 0x00000000004445cb in record__synthesize #3 0x0000000000444bc5 in __cmd_record ...
We synthesize an update event that needs to touch the evsel id array, which is not defined at that time. Fix this by forcing the id allocation for events with their unit defined.
Reflecting possible read_format ID bit in the attr tests.
Reported-by: Yongxin Liu yongxin.liu@outlook.com Signed-off-by: Jiri Olsa jolsa@kernel.org Cc: Adam Lee leeadamrobert@gmail.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201477 Fixes: bfd8f72c2778 ("perf record: Synthesize unit/scale/... in event update") Link: http://lkml.kernel.org/r/20181112130012.5424-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/tests/attr/base-record | 2 +- tools/perf/util/evsel.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/tests/attr/base-record b/tools/perf/tests/attr/base-record index 37940665f736..efd0157b9d22 100644 --- a/tools/perf/tests/attr/base-record +++ b/tools/perf/tests/attr/base-record @@ -9,7 +9,7 @@ size=112 config=0 sample_period=* sample_type=263 -read_format=0 +read_format=0|4 disabled=1 inherit=1 pinned=0 diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 03a72310315f..e7dbdcc8d465 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1088,7 +1088,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts, attr->exclude_user = 1; }
- if (evsel->own_cpus) + if (evsel->own_cpus || evsel->unit) evsel->attr.read_format |= PERF_FORMAT_ID;
/*