diff options
| -rw-r--r-- | tools/perf/builtin-record.c | 15 | ||||
| -rw-r--r-- | tools/perf/util/event.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/event.h | 5 |
3 files changed, 20 insertions, 2 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 142eeb341b29..a01c8ae1ee07 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -636,8 +636,21 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) /* * Let the child rip */ - if (forks) + if (forks) { + union perf_event event; + /* + * 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, + rec->evlist->workload.pid, + process_synthesized_event, + machine); + perf_evlist__start_workload(rec->evlist); + } if (opts->initial_delay) { usleep(opts->initial_delay * 1000); diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 497157affc9c..6214ad47d554 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -167,7 +167,7 @@ static int perf_event__prepare_comm(union perf_event *event, pid_t pid, return 0; } -static pid_t perf_event__synthesize_comm(struct perf_tool *tool, +pid_t perf_event__synthesize_comm(struct perf_tool *tool, union perf_event *event, pid_t pid, perf_event__handler_t process, struct machine *machine) diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index f729df5e25e6..be5cbc7be889 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -478,6 +478,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type, const struct perf_sample *sample, bool swapped); +pid_t perf_event__synthesize_comm(struct perf_tool *tool, + union perf_event *event, pid_t pid, + perf_event__handler_t process, + struct machine *machine); + int perf_event__synthesize_mmap_events(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, |