diff options
| author | Namhyung Kim <[email protected]> | 2023-08-25 08:25:50 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2023-08-29 14:16:14 -0300 |
| commit | baec60800dd4a379546f3ba311574d907a01a77d (patch) | |
| tree | 7daa193bb1b98fe5b1286195293661b6eef2be09 | |
| parent | 9bf63282ea77a531ea58acb42fb3f40d2d1e4497 (diff) | |
libperf: Add perf_record_header_attr_id()
The HEADER_ATTR record has an event attr followed by the id array. But
perf data from a different version could have different size of attr.
So it cannot just use event->attr.id to access the array. Let's add the
perf_record_header_attr_id() macro to calculate the start of the array.
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/lib/perf/include/perf/event.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h index ba2dcf64f4e6..e563dd8c3628 100644 --- a/tools/lib/perf/include/perf/event.h +++ b/tools/lib/perf/include/perf/event.h @@ -151,6 +151,10 @@ struct perf_record_header_attr { __u64 id[]; }; +/* Returns the pointer to id array based on the actual attr size. */ +#define perf_record_header_attr_id(evt) \ + ((void *)&(evt)->attr.attr + (evt)->attr.attr.size) + enum { PERF_CPU_MAP__CPUS = 0, PERF_CPU_MAP__MASK = 1, |