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-rw-r--r--tools/perf/util/thread.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 0a9ae8014729..dfd00c6dad6e 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -19,8 +19,10 @@ int thread__init_map_groups(struct thread *thread, struct machine *machine)
thread->mg = map_groups__new(machine);
} else {
leader = __machine__findnew_thread(machine, pid, pid);
- if (leader)
+ if (leader) {
thread->mg = map_groups__get(leader->mg);
+ thread__put(leader);
+ }
}
return thread->mg ? 0 : -1;
@@ -53,7 +55,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
goto err_thread;
list_add(&comm->list, &thread->comm_list);
- atomic_set(&thread->refcnt, 0);
+ atomic_set(&thread->refcnt, 1);
RB_CLEAR_NODE(&thread->rb_node);
}
@@ -95,6 +97,10 @@ struct thread *thread__get(struct thread *thread)
void thread__put(struct thread *thread)
{
if (thread && atomic_dec_and_test(&thread->refcnt)) {
+ /*
+ * Remove it from the dead_threads list, as last reference
+ * is gone.
+ */
list_del_init(&thread->node);
thread__delete(thread);
}