cyc_thread_state_type DEBUG_SHOW_DIAG gc_add_mutator gc_alloc gc_alloc_bignum gc_allocated_bytes GC_COLLECTION_THRESHOLD gc_collector_trace gc_color_blue gc_color_red gc_copy_obj GC_DEBUG_SHOW_SWEEP_DIAG GC_DEBUG_TRACE GC_DEBUG_VERBOSE gc_empty_collector_stack gc_free_list GC_FREE_THRESHOLD gc_grow_heap gc_handshake gc_header_type gc_heap gc_heap_create gc_heap_free gc_heap_last gc_heap_merge gc_heap_root gc_heap_total_size gc_heap_type gc_init_heap gc_initialize gc_is_stack_obj gc_mark_globals gc_mark_gray gc_mark_gray2 gc_merge_all_heaps gc_mut_cooperate gc_mut_update gc_mutator_thread_blocked gc_mutator_thread_runnable gc_post_handshake gc_print_stats gc_remove_mutator gc_request_mark_globals GC_SAFETY_CHECKS gc_stage_type gc_start_collector gc_status_type gc_sweep gc_thr_add_to_move_buffer gc_thr_grow_move_buffer gc_thread_data gc_thread_data_free gc_thread_data_init gc_try_alloc gc_wait_handshake grayed GROW_HEAP_BY_SIZE HEAP_SIZE INITIAL_HEAP_SIZE mark MAX_STACK_TRACES NANOSECONDS_PER_MILLISECOND NUM_HEAP_TYPES return_thread_runnable set_thread_blocked

gc_mut_update() void gc_mut_update ( gc_thread_data *  thd, object  old_obj, object  value  ) Write barrier for updates to heap-allocated objects The key for this barrier is to identify stack objects that contain heap references, so they can be marked to avoid collection.