Method unfreeze

crates/vm/src/gc_state.rs:811–826

Unfreeze all objects (move from permanent to gen2). Lock order: generation_lists[2] → permanent_list (consistent with freeze).

(&self)

    /// Unfreeze all objects (move from permanent to gen2).
    /// Lock order: generation_lists[2] → permanent_list (consistent with freeze).
    pub fn unfreeze(&self) {
        let mut count = 0usize;

        {
            let mut gen2 = self.generation_lists[2].write();
            let mut perm_list = self.permanent_list.write();
            while let Some(ptr) = perm_list.pop_front() {
                gen2.push_front(ptr);
                unsafe { ptr.as_ref().set_gc_generation(2) };
                count += 1;
            }
            self.permanent.count.store(0, Ordering::SeqCst);
        }

        self.generations[2].count.fetch_add(count, Ordering::SeqCst);
    }

    /// Reset all locks to unlocked state after fork().
    ///