diff options
Diffstat (limited to 'tools/perf/util/thread.c')
| -rw-r--r-- | tools/perf/util/thread.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c index e3e5427e1c3c..a2490a20eb56 100644 --- a/tools/perf/util/thread.c +++ b/tools/perf/util/thread.c @@ -311,17 +311,30 @@ const char *thread__comm_str(struct thread *thread) return str; } +static int __thread__comm_len(struct thread *thread, const char *comm) +{ + if (!comm) + return 0; + thread->comm_len = strlen(comm); + + return thread->comm_len; +} + /* CHECKME: it should probably better return the max comm len from its comm list */ int thread__comm_len(struct thread *thread) { - if (!thread->comm_len) { - const char *comm = thread__comm_str(thread); - if (!comm) - return 0; - thread->comm_len = strlen(comm); + int comm_len = thread->comm_len; + + if (!comm_len) { + const char *comm; + + down_read(&thread->comm_lock); + comm = __thread__comm_str(thread); + comm_len = __thread__comm_len(thread, comm); + up_read(&thread->comm_lock); } - return thread->comm_len; + return comm_len; } size_t thread__fprintf(struct thread *thread, FILE *fp) |