Method gc_sweep

src/misc/gc_node.cpp:78–110

    }

    void gc_root::gc_sweep() {
        gc_collecting = true;
        while ( gc_first ) {
            auto node = gc_first;
            gc_unlink(node);
            uint32_t swept_magic = GC_MAGIC_SWEPT_PREFIX | (node->gc_magic & 0xFFFFu);
#if DAS_GC_DEBUG
            // !!! DO NOT REMOVE !!!
            // Memory poisoning mode for debugging use-after-sweep.
            // Destroys the object but keeps memory allocated with 0xCD fill.
            // gc_magic (with type tag) and gc_id are restored so crashed nodes can be identified.
            // Set DAS_GC_DEBUG=1 to enable, then use DAS_GC_BREAK_ON_ID to find the creator.
            {
                uint64_t saved_id = node->gc_id;
                node->~gc_node();
#ifdef _MSC_VER
                auto sz = _msize(node);
#elif defined(__APPLE__)
                auto sz = malloc_size(node);
#else
                auto sz = malloc_usable_size(node);
#endif
                memset(node, 0xCD, sz);
                node->gc_magic = swept_magic;
                node->gc_id = saved_id;
            }
#else
            node->gc_magic = swept_magic;
            delete node;
#endif
        }
        gc_collecting = false;
    }

    void gc_root::gc_dump_to_thread_root() {
        auto & threadRoot = gc_get_thread_root();