RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 05:07:35 +00:00
Code Issues Activity Actions

Kernel: Protect Process::m_name with a spinlock

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

10
Kernel/Process.h
View file

@ -220,7 +220,9 @@ public:
static LockRefPtr<Process> from_pid_ignoring_jails(ProcessID);
static SessionID get_sid_from_pgid(ProcessGroupID pgid);
StringView name() const { return m_name->view(); }
SpinlockProtected<NonnullOwnPtr<KString>, LockRank::None> const& name() const;
void set_name(NonnullOwnPtr<KString>);
ProcessID pid() const
{
return with_protected_data([](auto& protected_data) { return protected_data.pid; });
@ -669,7 +671,7 @@ private:
IntrusiveListNode<Process> m_list_node;
NonnullOwnPtr<KString> m_name;
SpinlockProtected<NonnullOwnPtr<KString>, LockRank::None> m_name;
SpinlockProtected<OwnPtr<Memory::AddressSpace>, LockRank::None> m_space;
@ -1027,7 +1029,9 @@ template<>
struct AK::Formatter<Kernel::Process> : AK::Formatter<FormatString> {
ErrorOr<void> format(FormatBuilder& builder, Kernel::Process const& value)
{
return AK::Formatter<FormatString>::format(builder, "{}({})"sv, value.name(), value.pid().value());
return value.name().with([&](auto& process_name) {
return AK::Formatter<FormatString>::format(builder, "{}({})"sv, process_name->view(), value.pid().value());
});
}
};