1 files changed, 11 insertions, 1 deletions

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 873ab505ca80..590793cc5142 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -214,14 +214,24 @@ struct comm *thread__comm(const struct thread *thread)
 
 struct comm *thread__exec_comm(const struct thread *thread)
 {
-        struct comm *comm, *last = NULL;
+        struct comm *comm, *last = NULL, *second_last = NULL;
 
         list_for_each_entry(comm, &thread->comm_list, list) {
                 if (comm->exec)
                         return comm;
+                second_last = last;
                 last = comm;
         }
 
+        /*
+         * 'last' with no start time might be the parent's comm of a synthesized
+         * thread (created by processing a synthesized fork event). For a main
+         * thread, that is very probably wrong. Prefer a later comm to avoid
+         * that case.
+         */
+        if (second_last && !last->start && thread->pid_ == thread->tid)
+                return second_last;
+
         return last;
 }