From: Namhyung Kim <namhy...@kernel.org> A previous patch added a synthesized comm event for forked child process but it missed that the event should contain area for sample_id_hdr at the end. It worked by accident since the perf_event union contains bigger event structs like mmap_events.
This patch fixes it by dynamically allocating event struct including those area like in perf_event__synthesize_thread_map(). Reported-by: Arnaldo Carvalho de Melo <a...@kernel.org> Signed-off-by: Namhyung Kim <namhy...@kernel.org> Cc: David Ahern <dsah...@gmail.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Link: http://lkml.kernel.org/r/1443577526-3240-1-git-send-email-namhy...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-record.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index a01c8ae1ee07..5e01c070dbf2 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -637,17 +637,25 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) * Let the child rip */ if (forks) { - union perf_event event; + union perf_event *event; + + event = malloc(sizeof(event->comm) + machine->id_hdr_size); + if (event == NULL) { + err = -ENOMEM; + goto out_child; + } + /* * Some H/W events are generated before COMM event * which is emitted during exec(), so perf script * cannot see a correct process name for those events. * Synthesize COMM event to prevent it. */ - perf_event__synthesize_comm(tool, &event, + perf_event__synthesize_comm(tool, event, rec->evlist->workload.pid, process_synthesized_event, machine); + free(event); perf_evlist__start_workload(rec->evlist); } -- 2.1.0 -- 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/
