sig
  val stack_ctx_words : int
  type t =
      Domain_young_limit
    | Domain_young_ptr
    | Domain_young_start
    | Domain_young_end
    | Domain_young_trigger
    | Domain_current_stack
    | Domain_exn_handler
    | Domain_action_pending
    | Domain_c_stack
    | Domain_stack_cache
    | Domain_gc_regs_buckets
    | Domain_gc_regs
    | Domain_minor_tables
    | Domain_mark_stack
    | Domain_marking_done
    | Domain_sweeping_done
    | Domain_allocated_words
    | Domain_swept_words
    | Domain_major_slice_epoch
    | Domain_local_roots
    | Domain_ephe_info
    | Domain_final_info
    | Domain_backtrace_pos
    | Domain_backtrace_active
    | Domain_backtrace_buffer
    | Domain_backtrace_last_exn
    | Domain_compare_unordered
    | Domain_oo_next_id_local
    | Domain_requested_major_slice
    | Domain_requested_global_major_slice
    | Domain_requested_minor_gc
    | Domain_requested_external_interrupt
    | Domain_parser_trace
    | Domain_minor_heap_wsz
    | Domain_shared_heap
    | Domain_id
    | Domain_unique_id
    | Domain_dls_root
    | Domain_extra_heap_resources
    | Domain_extra_heap_resources_minor
    | Domain_dependent_size
    | Domain_dependent_allocated
    | Domain_slice_target
    | Domain_slice_budget
    | Domain_major_work_done_between_slices
    | Domain_extern_state
    | Domain_intern_state
    | Domain_stat_minor_words
    | Domain_stat_promoted_words
    | Domain_stat_major_words
    | Domain_stat_forced_major_collections
    | Domain_stat_blocks_marked
    | Domain_inside_stw_handler
    | Domain_trap_sp_off
    | Domain_trap_barrier_off
    | Domain_trap_barrier_block
    | Domain_external_raise
    | Domain_memprof
    | Domain_memprof_young_trigger
    | Domain_extra_params
  val idx_of_field : Domainstate.t -> int
end