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Kernel: Put Process unveil state in a SpinlockProtected container

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This makes path resolution safe to perform without holding the big lock.
This commit is contained in:
Andreas Kling 2022-03-07 21:23:08 +01:00
parent 24f02bd421
commit 580d89f093
7 changed files with 87 additions and 67 deletions
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9
Kernel/Syscalls/fork.cpp
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@ -20,8 +20,13 @@ ErrorOr<FlatPtr> Process::sys$fork(RegisterState& regs)
RefPtr<Thread> child_first_thread;
auto child_name = TRY(m_name->try_clone());
auto child = TRY(Process::try_create(child_first_thread, move(child_name), uid(), gid(), pid(), m_is_kernel_process, current_directory(), m_executable, m_tty, this));
child->m_veil_state = m_veil_state;
child->m_unveiled_paths = TRY(m_unveiled_paths.deep_copy());
TRY(m_unveil_data.with([&](auto& parent_unveil_data) -> ErrorOr<void> {
return child->m_unveil_data.with([&](auto& child_unveil_data) -> ErrorOr<void> {
child_unveil_data.state = parent_unveil_data.state;
child_unveil_data.paths = TRY(parent_unveil_data.paths.deep_copy());
return {};
});
}));
TRY(child->m_fds.with_exclusive([&](auto& child_fds) {
return m_fds.with_exclusive([&](auto& parent_fds) {