diff options
| author | Yabin Cui <yabinc@google.com> | 2024-05-15 22:36:08 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-11-19 11:23:42 +0300 |
| commit | f226805bc5f60adf03783d8e4cbfe303ccecd64e (patch) | |
| tree | 63054f13581f6171d4ccad02d4654e2f17676dce /include/linux | |
| parent | b9c44b91476b67327a521568a854babecc4070ab (diff) | |
| download | linux-f226805bc5f60adf03783d8e4cbfe303ccecd64e.tar.xz | |
perf/core: Check sample_type in perf_sample_save_callchain
Check sample_type in perf_sample_save_callchain() to prevent
saving callchain data when it isn't required.
Suggested-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Yabin Cui <yabinc@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240515193610.2350456-3-yabinc@google.com
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/perf_event.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index f7c0a3f2f502..3ac202d971fb 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1279,6 +1279,11 @@ static inline void perf_sample_save_callchain(struct perf_sample_data *data, { int size = 1; + if (!(event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)) + return; + if (WARN_ON_ONCE(data->sample_flags & PERF_SAMPLE_CALLCHAIN)) + return; + data->callchain = perf_callchain(event, regs); size += data->callchain->nr; |