diff options
Diffstat (limited to 'erts/emulator/beam/erl_nif.c')
| -rw-r--r-- | erts/emulator/beam/erl_nif.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c index 9ffb53d532..05bcf73451 100644 --- a/erts/emulator/beam/erl_nif.c +++ b/erts/emulator/beam/erl_nif.c @@ -587,6 +587,10 @@ int erts_flush_trace_messages(Process *c_p, ErtsProcLocks c_p_locks) ErlTraceMessageQueue *msgq, **last_msgq; int reds = 0; + /* Only one thread at a time is allowed to flush trace messages, + so we require the main lock to be held when doing the flush */ + ERTS_CHK_HAVE_ONLY_MAIN_PROC_LOCK(c_p); + erts_proc_lock(c_p, ERTS_PROC_LOCK_TRACE); msgq = c_p->trace_msg_q; |