diff options
| -rw-r--r-- | tools/perf/util/session.c | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 948327d9e92..64500fc7879 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -960,6 +960,30 @@ out_err: return err; } +static union perf_event * +fetch_mmaped_event(struct perf_session *session, + u64 head, size_t mmap_size, char *buf) +{ + union perf_event *event; + + /* + * Ensure we have enough space remaining to read + * the size of the event in the headers. + */ + if (head + sizeof(event->header) > mmap_size) + return NULL; + + event = (union perf_event *)(buf + head); + + if (session->header.needs_swap) + perf_event_header__bswap(&event->header); + + if (head + event->header.size > mmap_size) + return NULL; + + return event; +} + int __perf_session__process_events(struct perf_session *session, u64 data_offset, u64 data_size, u64 file_size, struct perf_event_ops *ops) @@ -1014,19 +1038,8 @@ remap: file_pos = file_offset + head; more: - /* - * Ensure we have enough space remaining to read - * the size of the event in the headers. - */ - if (head + sizeof(event->header) > mmap_size) - goto remap; - - event = (union perf_event *)(buf + head); - - if (session->header.needs_swap) - perf_event_header__bswap(&event->header); - - if (head + event->header.size > mmap_size) { + event = fetch_mmaped_event(session, head, mmap_size, buf); + if (!event) { if (mmaps[map_idx]) { munmap(mmaps[map_idx], mmap_size); mmaps[map_idx] = NULL; |