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Kernel: Report POLLNVAL events in sys$poll instead of returning EBADF

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As required by Dr. Posix.
This commit is contained in:
Idan Horowitz 2022-07-10 00:18:54 +03:00 • committed by Andreas Kling
parent e32f6903f6
commit 275e5cdb64
3 changed files with 22 additions and 5 deletions
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16
Kernel/ThreadBlockers.cpp
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@ -360,6 +360,10 @@ bool Thread::SelectBlocker::setup_blocker()
if (!should_block)
continue;
if (!fd_entry.description) {
should_block = false;
continue;
}
if (!fd_entry.description->blocker_set().add_blocker(*this, &fd_entry))
should_block = false;
}
@ -371,8 +375,10 @@ Thread::SelectBlocker::~SelectBlocker() = default;
void Thread::SelectBlocker::finalize()
{
Thread::FileBlocker::finalize();
for (auto& fd_entry : m_fds)
fd_entry.description->blocker_set().remove_blocker(*this);
for (auto& fd_entry : m_fds) {
if (fd_entry.description)
fd_entry.description->blocker_set().remove_blocker(*this);
}
}
void Thread::SelectBlocker::will_unblock_immediately_without_blocking(UnblockImmediatelyReason reason)
@ -397,6 +403,7 @@ bool Thread::SelectBlocker::unblock_if_conditions_are_met(bool from_add_blocker,
if (m_did_unblock)
return false;
VERIFY(fd_info.description);
auto unblock_flags = fd_info.description->should_unblock(fd_info.block_flags);
if (unblock_flags == BlockFlags::None)
return false;
@ -421,6 +428,11 @@ size_t Thread::SelectBlocker::collect_unblocked_flags()
for (auto& fd_entry : m_fds) {
VERIFY(fd_entry.block_flags != FileBlocker::BlockFlags::None);
if (!fd_entry.description) {
count++;
continue;
}
// unblock will have set at least the first descriptor's unblock
// flags that triggered the unblock. Make sure we don't discard that
// information as it may have changed by now!