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Kernel: Defer signal handling without a register capture earlier

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We were deferring the signal handling after already marking the signal
as handling, which led to some failures in the Shell tests.
This commit is contained in:
Idan Horowitz 2022-02-26 22:50:17 +02:00
parent 011bd06053
commit 853f7092f8
Notes: sideshowbarker 2024-07-17 18:11:09 +09:00 
Author: https://github.com/IdanHo
Commit: https://github.com/SerenityOS/serenity/commit/853f7092f8
Pull-request: https://github.com/SerenityOS/serenity/pull/12790
1 changed files with 7 additions and 7 deletions
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14
Kernel/Thread.cpp
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@ -979,6 +979,13 @@ DispatchSignalResult Thread::dispatch_signal(u8 signal)
// FIXME: Implement SA_SIGINFO signal handlers.
VERIFY(!(action.flags & SA_SIGINFO));
if (!current_trap() && !action.handler_or_sigaction.is_null()) {
// We're trying dispatch a handled signal to a user process that was scheduled
// after a yielding/blocking kernel thread, we don't have a register capture of
// the thread, so just defer processing the signal to later.
return DispatchSignalResult::Deferred;
}
// Mark this signal as handled.
m_pending_signals &= ~(1 << (signal - 1));
m_have_any_unmasked_pending_signals.store((m_pending_signals & ~m_signal_mask) != 0, AK::memory_order_release);
@ -1035,13 +1042,6 @@ DispatchSignalResult Thread::dispatch_signal(u8 signal)
return DispatchSignalResult::Continue;
}
if (!current_trap()) {
// We're trying dispatch a signal to a user process that was scheduled after
// a yielding/blocking kernel thread, we don't have a register capture of the
// thread, so just defer processing the signal to later.
return DispatchSignalResult::Deferred;
}
ScopedAddressSpaceSwitcher switcher(m_process);
u32 old_signal_mask = m_signal_mask;