6 inline static code_block_visitor<code_workhorse> make_code_visitor(factor_vm *parent)
8 return code_block_visitor<code_workhorse>(parent,code_workhorse(parent));
11 full_collector::full_collector(factor_vm *parent_) :
12 collector<tenured_space,full_policy>(
14 parent_->data->tenured,
15 full_policy(parent_)),
16 code_visitor(make_code_visitor(parent_)) {}
18 void full_collector::trace_code_block(code_block *compiled)
20 data_visitor.visit_code_block_objects(compiled);
21 data_visitor.visit_embedded_literals(compiled);
22 code_visitor.visit_embedded_code_pointers(compiled);
25 void full_collector::trace_context_code_blocks()
27 code_visitor.visit_context_code_blocks();
30 void full_collector::trace_callback_code_blocks()
32 code_visitor.visit_callback_code_blocks();
35 void full_collector::trace_object_code_block(object *obj)
37 code_visitor.visit_object_code_block(obj);
40 /* After a sweep, invalidate any code heap roots which are not marked,
41 so that if a block makes a tail call to a generic word, and the PIC
42 compiler triggers a GC, and the caller block gets gets GCd as a result,
43 the PIC code won't try to overwrite the call site */
44 void factor_vm::update_code_roots_for_sweep()
46 std::vector<code_root *>::const_iterator iter = code_roots.begin();
47 std::vector<code_root *>::const_iterator end = code_roots.end();
49 mark_bits<code_block> *state = &code->allocator->state;
51 for(; iter < end; iter++)
53 code_root *root = *iter;
54 code_block *block = (code_block *)(root->value & -block_granularity);
55 if(root->valid && !state->marked_p(block))
60 /* After a compaction, invalidate any code heap roots which are not
61 marked as above, and also slide the valid roots up so that call sites
62 can be updated correctly. */
63 void factor_vm::update_code_roots_for_compaction()
65 std::vector<code_root *>::const_iterator iter = code_roots.begin();
66 std::vector<code_root *>::const_iterator end = code_roots.end();
68 mark_bits<code_block> *state = &code->allocator->state;
70 for(; iter < end; iter++)
72 code_root *root = *iter;
73 code_block *block = (code_block *)(root->value & -block_granularity);
75 /* Offset of return address within 16-byte allocation line */
76 cell offset = root->value - (cell)block;
78 if(root->valid && state->marked_p((code_block *)root->value))
80 block = state->forward_block(block);
81 root->value = (cell)block + offset;
88 void factor_vm::collect_mark_impl(bool trace_contexts_p)
90 full_collector collector(this);
94 code->clear_mark_bits();
95 data->tenured->clear_mark_bits();
97 collector.trace_roots();
100 collector.trace_contexts();
101 collector.trace_context_code_blocks();
102 collector.trace_callback_code_blocks();
105 while(!mark_stack.empty())
107 cell ptr = mark_stack.back();
108 mark_stack.pop_back();
112 code_block *compiled = (code_block *)(ptr - 1);
113 collector.trace_code_block(compiled);
117 object *obj = (object *)ptr;
118 collector.trace_object(obj);
119 collector.trace_object_code_block(obj);
123 data->reset_generation(data->tenured);
124 data->reset_generation(data->aging);
125 data->reset_generation(&nursery);
126 code->clear_remembered_set();
129 void factor_vm::collect_sweep_impl()
131 current_gc->event->started_data_sweep();
132 data->tenured->sweep();
133 current_gc->event->ended_data_sweep();
135 update_code_roots_for_sweep();
137 current_gc->event->started_code_sweep();
138 code->allocator->sweep();
139 current_gc->event->ended_code_sweep();
142 void factor_vm::collect_full(bool trace_contexts_p)
144 collect_mark_impl(trace_contexts_p);
145 collect_sweep_impl();
146 if(data->low_memory_p())
148 current_gc->op = collect_compact_op;
149 current_gc->event->op = collect_compact_op;
150 collect_compact_impl(trace_contexts_p);
154 void factor_vm::collect_compact(bool trace_contexts_p)
156 collect_mark_impl(trace_contexts_p);
157 collect_compact_impl(trace_contexts_p);
160 void factor_vm::collect_growing_heap(cell requested_bytes, bool trace_contexts_p)
162 /* Grow the data heap and copy all live objects to the new heap. */
163 data_heap *old = data;
164 set_data_heap(data->grow(requested_bytes));
165 collect_mark_impl(trace_contexts_p);
166 collect_compact_code_impl(trace_contexts_p);