/* Compact just the code heap, after growing the data heap */
void factor_vm::collect_compact_code_impl(bool trace_contexts_p)
{
/* Figure out where blocks are going to go */
mark_bits<code_block> *code_forwarding_map = &code->allocator->state;
code_forwarding_map->compute_forwarding();
const code_block *code_finger = code->allocator->first_block();
code_compaction_fixup fixup(code_forwarding_map,&code_finger);
slot_visitor<code_compaction_fixup> data_forwarder(this,fixup);
code_block_visitor<code_compaction_fixup> code_forwarder(this,fixup);
code_forwarder.visit_uninitialized_code_blocks();
if(trace_contexts_p)
code_forwarder.visit_context_code_blocks();
/* Update code heap references in data heap */
object_grow_heap_updater object_updater(code_forwarder);
each_object(object_updater);
/* Slide everything in the code heap up, and update code heap
pointers inside code blocks. */
code_block_compaction_updater<code_compaction_fixup> code_block_updater(this,fixup,data_forwarder,code_forwarder);
code->allocator->compact(code_block_updater,fixup,&code_finger);
update_code_roots_for_compaction();
callbacks->update();
}
/* Compact data and code heaps */
void factor_vm::collect_compact_impl(bool trace_contexts_p)
{
gc_event *event = current_gc->event;
#if defined(FACTOR_DEBUG)
code->verify_all_blocks_set();
#endif
if(event) event->started_compaction();
tenured_space *tenured = data->tenured;
mark_bits<object> *data_forwarding_map = &tenured->state;
mark_bits<code_block> *code_forwarding_map = &code->allocator->state;
/* Figure out where blocks are going to go */
data_forwarding_map->compute_forwarding();
code_forwarding_map->compute_forwarding();
const object *data_finger = tenured->first_block();
const code_block *code_finger = code->allocator->first_block();
compaction_fixup fixup(data_forwarding_map,code_forwarding_map,&data_finger,&code_finger);
slot_visitor<compaction_fixup> data_forwarder(this,fixup);
code_block_visitor<compaction_fixup> code_forwarder(this,fixup);
code_forwarder.visit_code_roots();
/* Object start offsets get recomputed by the object_compaction_updater */
data->tenured->starts.clear_object_start_offsets();
/* Slide everything in tenured space up, and update data and code heap
pointers inside objects. */
object_compaction_updater object_updater(this,fixup);
tenured->compact(object_updater,fixup,&data_finger);
/* Slide everything in the code heap up, and update data and code heap
pointers inside code blocks. */
code_block_compaction_updater<compaction_fixup> code_block_updater(this,fixup,data_forwarder,code_forwarder);
code->allocator->compact(code_block_updater,fixup,&code_finger);
data_forwarder.visit_roots();
if(trace_contexts_p)
{
data_forwarder.visit_contexts();
code_forwarder.visit_context_code_blocks();
}
update_code_roots_for_compaction();
callbacks->update();
code->initialize_all_blocks_set();
if(event) event->ended_compaction();
}
