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Kernel: Ignore signals sent to threadless (zombie) processes
If a process doesn't have any threads left, it's in a zombie state and we can't meaningfully send signals to it. So just ignore them. Fixes #1313.
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@ -3719,6 +3719,8 @@ void Process::terminate_due_to_signal(u8 signal)
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void Process::send_signal(u8 signal, Process* sender)
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{
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InterruptDisabler disabler;
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if (!m_thread_count)
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return;
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auto* thread = Thread::from_tid(m_pid);
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if (!thread)
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thread = &any_thread();
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