[PATCH 12/21] perf db-export: Also export thread's current comm

Adrian Hunter
2019-07-10T09:00:29Z

Currently, the initial comm of the main thread is exported. Export also a
thread's current comm. That better supports the tracing of multi-threaded
applications that set different comms for different threads to make it
easier to distinguish them.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/db-export.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
index 305adead3a1d..2220a60ad29e 100644
--- a/tools/perf/util/db-export.c
+++ b/tools/perf/util/db-export.c
@@ -298,6 +298,7 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
};
struct thread *main_thread;
struct comm *comm = NULL;
+ struct comm *curr_comm;
int err;

err = db_export__evsel(dbe, evsel);
@@ -349,6 +350,13 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
}
}

+ curr_comm = thread__comm(thread);
+ if (curr_comm) {
+ err = db_export__comm(dbe, curr_comm, thread);
+ if (err)
+ goto out_put;
+ }
+
es.db_id = ++dbe->sample_last_db_id;

err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
--
2.17.1