If PERF_RECORD_MISC_BUILD_ID misc bit is set, mmap2 event carries build id, placed in following union:
union { struct { u32 maj; u32 min; u64 ino; u64 ino_generation; }; struct { u8 build_id[20]; u8 build_id_size; u8 __reserved_1; u16 __reserved_2; }; }; In this case we can't swap above fields. Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/util/session.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 098080287c68..2891a49d3fe1 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -592,10 +592,13 @@ static void perf_event__mmap2_swap(union perf_event *event, event->mmap2.start = bswap_64(event->mmap2.start); event->mmap2.len = bswap_64(event->mmap2.len); event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); - event->mmap2.maj = bswap_32(event->mmap2.maj); - event->mmap2.min = bswap_32(event->mmap2.min); - event->mmap2.ino = bswap_64(event->mmap2.ino); - event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); + + if (!(event->header.misc & PERF_RECORD_MISC_BUILD_ID)) { + event->mmap2.maj = bswap_32(event->mmap2.maj); + event->mmap2.min = bswap_32(event->mmap2.min); + event->mmap2.ino = bswap_64(event->mmap2.ino); + event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); + } if (sample_id_all) { void *data = &event->mmap2.filename; -- 2.26.2