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Kernel: Protect Process::m_name with a spinlock

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This also lets us remove the `get_process_name` and `set_process_name`
syscalls from the big lock. :^)
This commit is contained in:
Sam Atkins 2023-02-04 13:01:46 +00:00 • committed by Andreas Kling
parent b26ecca970
commit fe7b08dad7
13 changed files with 102 additions and 42 deletions
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17
Kernel/Thread.cpp
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@ -47,7 +47,7 @@ ErrorOr<NonnullLockRefPtr<Thread>> Thread::try_create(NonnullLockRefPtr<Process>
auto block_timer = TRY(try_make_lock_ref_counted<Timer>());
auto name = TRY(KString::try_create(process->name()));
auto name = TRY(process->name().with([](auto& name) { return name->try_clone(); }));
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) Thread(move(process), move(kernel_stack_region), move(block_timer), move(name)));
}
@ -72,8 +72,11 @@ Thread::Thread(NonnullLockRefPtr<Process> process, NonnullOwnPtr<Memory::Region>
list.append(*this);
});
if constexpr (THREAD_DEBUG)
dbgln("Created new thread {}({}:{})", m_process->name(), m_process->pid().value(), m_tid.value());
if constexpr (THREAD_DEBUG) {
m_process->name().with([&](auto& process_name) {
dbgln("Created new thread {}({}:{})", process_name->view(), m_process->pid().value(), m_tid.value());
});
}
reset_fpu_state();
@ -1467,7 +1470,9 @@ void Thread::track_lock_release(LockRank rank)
ErrorOr<void> AK::Formatter<Kernel::Thread>::format(FormatBuilder& builder, Kernel::Thread const& value)
{
return AK::Formatter<FormatString>::format(
builder,
"{}({}:{})"sv, value.process().name(), value.pid().value(), value.tid().value());
return value.process().name().with([&](auto& process_name) {
return AK::Formatter<FormatString>::format(
builder,
"{}({}:{})"sv, process_name->view(), value.pid().value(), value.tid().value());
});
}