73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
#include "master.hpp"
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namespace factor {
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struct aging_policy {
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aging_space* aging;
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tenured_space* tenured;
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explicit aging_policy(factor_vm* parent)
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: aging(parent->data->aging), tenured(parent->data->tenured) {}
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bool should_copy_p(object* untagged) {
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return !(aging->contains_p(untagged) || tenured->contains_p(untagged));
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}
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void promoted_object(object* obj) {}
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void visited_object(object* obj) {}
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};
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void factor_vm::collect_aging() {
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/* Promote objects referenced from tenured space to tenured space, copy
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everything else to the aging semi-space, and reset the nursery pointer. */
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{
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/* Change the op so that if we fail here, an assertion will be
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raised. */
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current_gc->op = collect_to_tenured_op;
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gc_workhorse<tenured_space, to_tenured_policy>
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workhorse(this, data->tenured, to_tenured_policy(this));
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slot_visitor<gc_workhorse<tenured_space, to_tenured_policy>>
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visitor(this, workhorse);
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gc_event* event = current_gc->event;
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if (event)
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event->reset_timer();
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visitor.visit_cards(data->tenured, card_points_to_aging, 0xff);
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if (event)
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event->ended_card_scan(visitor.cards_scanned, visitor.decks_scanned);
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if (event)
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event->reset_timer();
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visitor.visit_code_heap_roots(&code->points_to_aging);
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if (event)
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event->ended_code_scan(code->points_to_aging.size());
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visitor.visit_mark_stack(&mark_stack);
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}
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{
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/* If collection fails here, do a to_tenured collection. */
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current_gc->op = collect_aging_op;
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std::swap(data->aging, data->aging_semispace);
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data->reset_aging();
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aging_space *target = data->aging;
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gc_workhorse<aging_space, aging_policy>
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workhorse(this, target, aging_policy(this));
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slot_visitor<gc_workhorse<aging_space, aging_policy>>
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visitor(this, workhorse);
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cell scan = target->start + target->occupied_space();
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visitor.visit_all_roots();
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visitor.cheneys_algorithm(target, scan);
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data->reset_nursery();
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code->clear_remembered_set();
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}
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}
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}
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