Fix: lttng perf counter deadlock
[lttng-ust.git] / liblttng-ust / lttng-ust-comm.c
index 4d8519789469b988de3f745018ca8fa39bc28963..e449edad0ad1916cb09ca3bcc070f49e6574d22d 100644 (file)
@@ -423,6 +423,7 @@ void lttng_ust_fixup_tls(void)
        lttng_fixup_nest_count_tls();
        lttng_fixup_procname_tls();
        lttng_fixup_ust_mutex_nest_tls();
+       lttng_ust_fixup_perf_counter_tls();
        lttng_ust_fixup_fd_tracker_tls();
 }
 
@@ -2068,6 +2069,7 @@ void ust_before_fork(sigset_t *save_sigset)
        ust_lock_nocheck();
        rcu_bp_before_fork();
        lttng_ust_lock_fd_tracker();
+       lttng_perf_lock();
 }
 
 static void ust_after_fork_common(sigset_t *restore_sigset)
@@ -2075,6 +2077,7 @@ static void ust_after_fork_common(sigset_t *restore_sigset)
        int ret;
 
        DBG("process %d", getpid());
+       lttng_perf_unlock();
        lttng_ust_unlock_fd_tracker();
        ust_unlock();
 
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