t.Errorf("AllThreadSyscall(SYS_CAPGET) got %d, %d, %v, want err %v", r1, r2, err, syscall.EFAULT)
	}
}

// TestAllThreadsSyscallBlockedSyscall confirms that AllThreadsSyscall
// can interrupt threads in long-running system calls. This test will
// deadlock if this doesn't work correctly.
func TestAllThreadsSyscallBlockedSyscall(t *testing.T) {