From: Arnaldo Carvalho de Melo <a...@redhat.com> Sometimes we're segfaulting because we were expecting that the perf_sample.raw_data field was set as requested, but in some cases that needs further investigation, that field can be NULL, leading to segfaults.
Make the tool more robust by checking that before calling any per event handlers that may try to use that field. Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Mike Galbraith <efa...@gmx.de> Cc: Namhyung Kim <namhy...@gmail.com> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/n/tip-g1fmodl6ys4lq8honbj1i...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-trace.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 83c6515..7aaee39 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -268,6 +268,13 @@ again: if (evlist->threads->map[0] == -1 || evlist->threads->nr > 1) printf("%d ", sample.tid); + if (sample.raw_data == NULL) { + printf("%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", + perf_evsel__name(evsel), sample.tid, + sample.cpu, sample.raw_size); + continue; + } + handler = evsel->handler.func; handler(trace, evsel, &sample); } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
