81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
#include "master.hpp"
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namespace factor {
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/* After a sweep, invalidate any code heap roots which are not marked,
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so that if a block makes a tail call to a generic word, and the PIC
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compiler triggers a GC, and the caller block gets GCd as a result,
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the PIC code won't try to overwrite the call site */
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void factor_vm::update_code_roots_for_sweep() {
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mark_bits* state = &code->allocator->state;
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FACTOR_FOR_EACH(code_roots) {
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code_root* root = *iter;
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cell block = root->value & (~data_alignment - 1);
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if (root->valid && !state->marked_p(block))
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root->valid = false;
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}
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}
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void factor_vm::collect_mark_impl() {
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gc_workhorse<tenured_space, full_policy>
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workhorse(this, this->data->tenured, full_policy(this));
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slot_visitor<gc_workhorse<tenured_space, full_policy> >
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visitor(this, workhorse);
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mark_stack.clear();
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code->allocator->state.clear_mark_bits();
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data->tenured->state.clear_mark_bits();
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visitor.visit_all_roots();
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visitor.visit_context_code_blocks();
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visitor.visit_uninitialized_code_blocks();
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visitor.visit_mark_stack(&mark_stack);
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data->reset_tenured();
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data->reset_aging();
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data->reset_nursery();
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code->clear_remembered_set();
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}
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void factor_vm::collect_sweep_impl() {
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gc_event* event = current_gc->event;
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if (event)
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event->started_data_sweep();
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data->tenured->sweep();
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if (event)
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event->ended_data_sweep();
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update_code_roots_for_sweep();
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if (event)
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event->started_code_sweep();
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code->sweep();
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if (event)
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event->ended_code_sweep();
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}
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void factor_vm::collect_full() {
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collect_mark_impl();
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collect_sweep_impl();
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if (data->low_memory_p()) {
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/* Full GC did not free up enough memory. Grow the heap. */
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set_current_gc_op(collect_growing_heap_op);
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collect_growing_heap(0);
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} else if (data->high_fragmentation_p()) {
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/* Enough free memory, but it is not contiguous. Perform a
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compaction. */
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set_current_gc_op(collect_compact_op);
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collect_compact_impl();
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}
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code->flush_icache();
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}
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}
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