GLOBAL_MUTEX_LOCK   80 third_party/re2/re2/re2.cc   GLOBAL_MUTEX_LOCK(empty_mutex);
GLOBAL_MUTEX_LOCK   69 third_party/re2/re2/regexp.cc   GLOBAL_MUTEX_LOCK(ref_mutex);
GLOBAL_MUTEX_LOCK   82 third_party/re2/re2/regexp.cc     GLOBAL_MUTEX_LOCK(ref_mutex);
GLOBAL_MUTEX_LOCK  106 third_party/re2/re2/regexp.cc     GLOBAL_MUTEX_LOCK(ref_mutex);