diff options
| author | Al Grant <[email protected]> | 2020-11-24 19:58:17 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2021-01-15 17:28:28 -0300 |
| commit | 648b054a4647cd62e13ba79f398b8b97a7c82b19 (patch) | |
| tree | 72e4a903f1c7a6d6231c9d0516b8bab217926e09 | |
| parent | 5501e9229a80d95a1ea68609f44c447a75d23ed5 (diff) | |
perf inject: Correct event attribute sizes
When 'perf inject' reads a perf.data file from an older version of perf,
it writes event attributes into the output with the original size field,
but lays them out as if they had the size currently used. Readers see a
corrupt file. Update the size field to match the layout.
Signed-off-by: Al Grant <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Denis Nikitin <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/header.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 062383e225a3..c4ed3dc2c8f4 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -3323,6 +3323,14 @@ int perf_session__write_header(struct perf_session *session, attr_offset = lseek(ff.fd, 0, SEEK_CUR); evlist__for_each_entry(evlist, evsel) { + if (evsel->core.attr.size < sizeof(evsel->core.attr)) { + /* + * We are likely in "perf inject" and have read + * from an older file. Update attr size so that + * reader gets the right offset to the ids. + */ + evsel->core.attr.size = sizeof(evsel->core.attr); + } f_attr = (struct perf_file_attr){ .attr = evsel->core.attr, .ids = { |