go/src/os/signal/signal_linux_test.go

const prSetKeepCaps …

// This test validates that syscall.AllThreadsSyscall() can reliably
// reach all 'm' (threads) of the nocgo runtime even when one thread
// is blocked waiting to receive signals from the kernel. This monitors
// for a regression vs. the fix for #43149.
func TestAllThreadsSyscallSignals(t *testing.T) { … }