Kernel: Add helper function to check if a Process is in jail

Use this helper function in various places to replace the old code of
acquiring the SpinlockProtected<RefPtr<Jail>> of a Process to do that
validation.

1 files changed, 5 insertions, 0 deletions

diff --git a/Kernel/Process.h b/Kernel/Process.h
index 90b3e3ed76..67f257636d 100644
--- a/Kernel/Process.h
+++ b/Kernel/Process.h
@@ -240,6 +240,11 @@ public:
 
     SpinlockProtected<RefPtr<Jail>, LockRank::Process>& jail() { return m_attached_jail; }
 
+    bool is_currently_in_jail() const
+    {
+        return m_attached_jail.with([&](auto& jail) -> bool { return !jail.is_null(); });
+    }
+
     NonnullRefPtr<Credentials> credentials() const;
 
     bool is_dumpable() const