vm/aging_collector.cpp

   1 #include "master.hpp"
   2
   3 namespace factor {
   4
   5 void factor_vm::collect_aging() {
   6   /* Promote objects referenced from tenured space to tenured space, copy
   7      everything else to the aging semi-space, and reset the nursery pointer. */
   8   {
   9     /* Change the op so that if we fail here, an assertion will be
  10        raised. */
  11     current_gc->op = collect_to_tenured_op;
  12
  13     to_tenured_collector collector(this);
  14
  15     gc_event* event = current_gc->event;
  16
  17     if (event)
  18       event->started_card_scan();
  19     collector.trace_cards(data->tenured, card_points_to_aging, 0xff);
  20     if (event)
  21       event->ended_card_scan(collector.cards_scanned, collector.decks_scanned);
  22
  23     if (event)
  24       event->started_code_scan();
  25     collector.trace_code_heap_roots(&code->points_to_aging);
  26     if (event)
  27       event->ended_code_scan(collector.code_blocks_scanned);
  28
  29     collector.visitor.visit_mark_stack(&mark_stack);
  30   }
  31   {
  32     /* If collection fails here, do a to_tenured collection. */
  33     current_gc->op = collect_aging_op;
  34
  35     std::swap(data->aging, data->aging_semispace);
  36     data->reset_aging();
  37
  38     copying_collector<aging_space, aging_policy> collector(this,
  39                                                            this->data->aging,
  40                                                            aging_policy(this));
  41
  42     collector.visitor.visit_all_roots();
  43     collector.cheneys_algorithm();
  44
  45     data->reset_nursery();
  46     code->clear_remembered_set();
  47   }
  48 }
  49
  50 }