Commit-ID: 9389a46043c8f091dc8f8d8e25a5c1355f8bcc9b Gitweb: http://git.kernel.org/tip/9389a46043c8f091dc8f8d8e25a5c1355f8bcc9b Author: Jiri Olsa <jolsa@xxxxxxxxxx> AuthorDate: Mon, 16 Apr 2012 20:42:51 +0200 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Fri, 4 May 2012 11:53:22 -0300 perf session: Fail on processing event with unknown size Currently if we cannot decide the size of the event, we guess next event possition by: "... check alignment, and increment a single u64 in the hope to catch on again 'soon'" This usually ends up with segfault or endless loop. It's better to admit the failure right away, then pretend nothing happened. It makes the life easier ;) Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: http://lkml.kernel.org/r/20120416184251.GA11503@xxxxxxxxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/perf/util/session.c | 30 +++++++++--------------------- 1 files changed, 9 insertions(+), 21 deletions(-) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 9412e3b..f992ae3 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1100,16 +1100,10 @@ more: } if ((skip = perf_session__process_event(self, &event, tool, head)) < 0) { - dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n", - head, event.header.size, event.header.type); - /* - * assume we lost track of the stream, check alignment, and - * increment a single u64 in the hope to catch on again 'soon'. - */ - if (unlikely(head & 7)) - head &= ~7ULL; - - size = 8; + pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", + head, event.header.size, event.header.type); + err = -EINVAL; + goto out_err; } head += size; @@ -1218,17 +1212,11 @@ more: if (size == 0 || perf_session__process_event(session, event, tool, file_pos) < 0) { - dump_printf("%#" PRIx64 " [%#x]: skipping unknown header type: %d\n", - file_offset + head, event->header.size, - event->header.type); - /* - * assume we lost track of the stream, check alignment, and - * increment a single u64 in the hope to catch on again 'soon'. - */ - if (unlikely(head & 7)) - head &= ~7ULL; - - size = 8; + pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", + file_offset + head, event->header.size, + event->header.type); + err = -EINVAL; + goto out_err; } head += size; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html