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Lock finalizers' lists at exit #49931

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merged 1 commit into from
May 23, 2023
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Lock finalizers' lists at exit #49931

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5 changes: 5 additions & 0 deletions src/gc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -526,12 +526,17 @@ void jl_gc_run_all_finalizers(jl_task_t *ct)
jl_ptls_t* gc_all_tls_states;
gc_n_threads = jl_atomic_load_acquire(&jl_n_threads);
gc_all_tls_states = jl_atomic_load_relaxed(&jl_all_tls_states);
// this is called from `jl_atexit_hook`; threads could still be running
// so we have to guard the finalizers' lists
JL_LOCK_NOGC(&finalizers_lock);
schedule_all_finalizers(&finalizer_list_marked);
for (int i = 0; i < gc_n_threads; i++) {
jl_ptls_t ptls2 = gc_all_tls_states[i];
if (ptls2 != NULL)
schedule_all_finalizers(&ptls2->finalizers);
}
// unlock here because `run_finalizers` locks this
JL_UNLOCK_NOGC(&finalizers_lock);
gc_n_threads = 0;
gc_all_tls_states = NULL;
run_finalizers(ct);
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