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Kernel: Use non-locking {Nonnull,}RefPtr for OpenFileDescription

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This patch switches away from {Nonnull,}LockRefPtr to the non-locking
smart pointers throughout the kernel.

I've looked at the handful of places where these were being persisted
and I don't see any race situations.

Note that the process file descriptor table (Process::m_fds) was already
guarded via MutexProtected.
This commit is contained in:
Andreas Kling 2023-03-06 19:29:25 +01:00
parent 36b0ecfe9e
commit d1371d66f7
34 changed files with 82 additions and 80 deletions
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10
Kernel/Syscalls/execve.cpp
View file

@ -423,8 +423,8 @@ static ErrorOr<LoadResult> load_elf_object(NonnullOwnPtr<Memory::AddressSpace> n
}
ErrorOr<LoadResult>
Process::load(NonnullLockRefPtr<OpenFileDescription> main_program_description,
LockRefPtr<OpenFileDescription> interpreter_description, const ElfW(Ehdr) & main_program_header)
Process::load(NonnullRefPtr<OpenFileDescription> main_program_description,
RefPtr<OpenFileDescription> interpreter_description, const ElfW(Ehdr) & main_program_header)
{
auto new_space = TRY(Memory::AddressSpace::try_create(nullptr));
@ -471,8 +471,8 @@ void Process::clear_signal_handlers_for_exec()
}
}
ErrorOr<void> Process::do_exec(NonnullLockRefPtr<OpenFileDescription> main_program_description, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment,
LockRefPtr<OpenFileDescription> interpreter_description, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, const ElfW(Ehdr) & main_program_header)
ErrorOr<void> Process::do_exec(NonnullRefPtr<OpenFileDescription> main_program_description, Vector<NonnullOwnPtr<KString>> arguments, Vector<NonnullOwnPtr<KString>> environment,
RefPtr<OpenFileDescription> interpreter_description, Thread*& new_main_thread, InterruptsState& previous_interrupts_state, const ElfW(Ehdr) & main_program_header)
{
VERIFY(is_user_process());
VERIFY(!Processor::in_critical());
@ -784,7 +784,7 @@ static ErrorOr<Vector<NonnullOwnPtr<KString>>> find_shebang_interpreter_for_exec
return ENOEXEC;
}
ErrorOr<LockRefPtr<OpenFileDescription>> Process::find_elf_interpreter_for_executable(StringView path, ElfW(Ehdr) const& main_executable_header, size_t main_executable_header_size, size_t file_size)
ErrorOr<RefPtr<OpenFileDescription>> Process::find_elf_interpreter_for_executable(StringView path, ElfW(Ehdr) const& main_executable_header, size_t main_executable_header_size, size_t file_size)
{
// Not using ErrorOr here because we'll want to do the same thing in userspace in the RTLD
StringBuilder interpreter_path_builder;