6 full_collector::full_collector(factor_vm *parent_) :
7 copying_collector<tenured_space,full_policy>(
9 &parent_->gc_stats.full_stats,
10 parent_->data->tenured,
11 full_policy(parent_)) {}
13 struct stack_frame_marker {
15 full_collector *collector;
17 explicit stack_frame_marker(full_collector *collector_) :
18 parent(collector_->parent), collector(collector_) {}
20 void operator()(stack_frame *frame)
22 collector->mark_code_block(parent->frame_code(frame));
26 /* Mark code blocks executing in currently active stack frames. */
27 void full_collector::mark_active_blocks()
29 stack_frame_marker marker(this);
30 parent->iterate_active_frames(marker);
33 void full_collector::mark_object_code_block(object *obj)
35 switch(obj->h.hi_tag())
39 word *w = (word *)obj;
41 mark_code_block(w->code);
43 mark_code_block(w->profiling);
48 quotation *q = (quotation *)obj;
50 mark_code_block(q->code);
55 callstack *stack = (callstack *)obj;
56 stack_frame_marker marker(this);
57 parent->iterate_callstack_object(stack,marker);
63 struct callback_tracer {
64 full_collector *collector;
66 callback_tracer(full_collector *collector_) : collector(collector_) {}
68 void operator()(callback *stub)
70 collector->mark_code_block(stub->compiled);
74 void full_collector::trace_callbacks()
76 callback_tracer tracer(this);
77 parent->callbacks->iterate(tracer);
80 /* Trace all literals referenced from a code block. Only for aging and nursery collections */
81 void full_collector::trace_literal_references(code_block *compiled)
83 this->trace_handle(&compiled->owner);
84 this->trace_handle(&compiled->literals);
85 this->trace_handle(&compiled->relocation);
88 /* Mark all literals referenced from a word XT. Only for tenured
90 void full_collector::mark_code_block(code_block *compiled)
92 this->code->mark_block(compiled);
93 trace_literal_references(compiled);
96 void full_collector::cheneys_algorithm()
98 while(scan && scan < target->here)
100 object *obj = (object *)scan;
101 this->trace_slots(obj);
102 this->mark_object_code_block(obj);
103 scan = target->next_object_after(this->parent,scan);
107 /* After growing the heap, we have to perform a full relocation to update
108 references to card and deck arrays. */
109 struct big_code_heap_updater {
112 big_code_heap_updater(factor_vm *parent_) : parent(parent_) {}
114 void operator()(heap_block *block)
116 parent->relocate_code_block((code_block *)block);
120 /* After a full GC that did not grow the heap, we have to update references
121 to literals and other words. */
122 struct small_code_heap_updater {
125 small_code_heap_updater(factor_vm *parent_) : parent(parent_) {}
127 void operator()(heap_block *block)
129 parent->update_code_block_for_full_gc((code_block *)block);
133 void factor_vm::collect_full_impl(bool trace_contexts_p)
135 full_collector collector(this);
137 code->state->clear_mark_bits();
139 collector.trace_roots();
142 collector.trace_contexts();
143 collector.mark_active_blocks();
144 collector.trace_callbacks();
147 collector.cheneys_algorithm();
149 reset_generation(data->aging);
150 nursery.here = nursery.start;
153 void factor_vm::collect_growing_heap(cell requested_bytes,
154 bool trace_contexts_p,
155 bool compact_code_heap_p)
157 /* Grow the data heap and copy all live objects to the new heap. */
158 data_heap *old = data;
159 set_data_heap(data->grow(requested_bytes));
160 collect_full_impl(trace_contexts_p);
163 if(compact_code_heap_p)
165 compact_code_heap(trace_contexts_p);
166 big_code_heap_updater updater(this);
167 iterate_code_heap(updater);
171 big_code_heap_updater updater(this);
172 code->free_unmarked(updater);
175 code->clear_remembered_set();
178 void factor_vm::collect_full(bool trace_contexts_p, bool compact_code_heap_p)
180 /* Copy all live objects to the tenured semispace. */
181 std::swap(data->tenured,data->tenured_semispace);
182 reset_generation(data->tenured);
183 collect_full_impl(trace_contexts_p);
185 if(compact_code_heap_p)
187 compact_code_heap(trace_contexts_p);
188 big_code_heap_updater updater(this);
189 iterate_code_heap(updater);
193 small_code_heap_updater updater(this);
194 code->free_unmarked(updater);
197 code->clear_remembered_set();