Method freeze

crates/vm/src/gc_state.rs:792–807

Freeze all tracked objects (move to permanent generation). Lock order: generation_lists[i] → permanent_list (consistent with unfreeze).

(&self)

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

        for (gen_idx, gen_list) in self.generation_lists.iter().enumerate() {
            let mut list = gen_list.write();
            let mut perm = self.permanent_list.write();
            while let Some(ptr) = list.pop_front() {
                perm.push_front(ptr);
                unsafe { ptr.as_ref().set_gc_generation(GC_PERMANENT) };
                count += 1;
            }
            self.generations[gen_idx].count.store(0, Ordering::SeqCst);
        }

        self.permanent.count.fetch_add(count, Ordering::SeqCst);
    }

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