vm/full_collector.cpp

   1 #include "master.hpp"
   2
   3 namespace factor
   4 {
   5
   6 full_collector::full_collector(factor_vm *parent_) :
   7         collector<tenured_space,full_policy>(
   8                 parent_,
   9                 parent_->data->tenured,
  10                 full_policy(parent_)) {}
  11
  12 struct code_block_marker {
  13         code_heap *code;
  14         full_collector *collector;
  15
  16         explicit code_block_marker(code_heap *code_, full_collector *collector_) :
  17                 code(code_), collector(collector_) {}
  18
  19         code_block *operator()(code_block *compiled)
  20         {
  21                 if(!code->marked_p(compiled))
  22                 {
  23                         code->set_marked_p(compiled);
  24                         collector->trace_literal_references(compiled);
  25                 }
  26
  27                 return compiled;
  28         }
  29 };
  30
  31 void factor_vm::collect_mark_impl(bool trace_contexts_p)
  32 {
  33         full_collector collector(this);
  34
  35         code->clear_mark_bits();
  36         data->tenured->clear_mark_bits();
  37         data->tenured->clear_mark_stack();
  38
  39         code_block_visitor<code_block_marker> code_marker(this,code_block_marker(code,&collector));
  40
  41         collector.trace_roots();
  42         if(trace_contexts_p)
  43         {
  44                 collector.trace_contexts();
  45                 code_marker.visit_context_code_blocks();
  46                 code_marker.visit_callback_code_blocks();
  47         }
  48
  49         std::vector<object *> *mark_stack = &data->tenured->mark_stack;
  50
  51         while(!mark_stack->empty())
  52         {
  53                 object *obj = mark_stack->back();
  54                 mark_stack->pop_back();
  55                 collector.trace_object(obj);
  56                 code_marker.visit_object_code_block(obj);
  57         }
  58
  59         data->reset_generation(data->tenured);
  60         data->reset_generation(data->aging);
  61         data->reset_generation(&nursery);
  62         code->clear_remembered_set();
  63 }
  64
  65 void factor_vm::collect_sweep_impl()
  66 {
  67         current_gc->event->started_data_sweep();
  68         data->tenured->sweep();
  69         current_gc->event->ended_data_sweep();
  70 }
  71
  72 void factor_vm::collect_growing_heap(cell requested_bytes, bool trace_contexts_p)
  73 {
  74         /* Grow the data heap and copy all live objects to the new heap. */
  75         data_heap *old = data;
  76         set_data_heap(data->grow(requested_bytes));
  77         collect_mark_impl(trace_contexts_p);
  78         collect_compact_code_impl(trace_contexts_p);
  79         delete old;
  80 }
  81
  82 }