/**
* Called for each object in the young generation that is seen during garbage
* collection. An object is seen by scanning from the root objects to all
* reachable objects. Therefore, only reachable objects will be seen, and
* reachable objects may be seen more than once.
*
* @returns the new address for the object, so that the source reference can
* be updated when the object has been moved.
*/
Object* BakerGC::saw_object(Object* obj) {
Object* copy;
#ifdef ENABLE_OBJECT_WATCH
if(watched_p(obj)) {
std::cout << "detected " << obj << " during baker collection\n";
}
#endif
if(!obj->reference_p()) return obj;
if(!obj->young_object_p()) return obj;
if(obj->forwarded_p()) return obj->forward();
// This object is already in the next space, we don't want to
// copy it again!
if(next->contains_p(obj)) return obj;
if(unlikely(obj->inc_age() >= lifetime_)) {
copy = object_memory_->promote_object(obj);
promoted_push(copy);
} else if(likely(next->enough_space_p(
obj->size_in_bytes(object_memory_->state())))) {
copy = next->move_object(object_memory_->state(), obj);
total_objects++;
} else {
copy_spills_++;
copy = object_memory_->promote_object(obj);
promoted_push(copy);
}
#ifdef ENABLE_OBJECT_WATCH
if(watched_p(copy)) {
std::cout << "detected " << copy << " during baker collection (2)\n";
}
#endif
return copy;
}
Object* BakerGC::saw_object(Object* obj) {
Object* copy;
if(watched_p(obj)) {
std::cout << "detected " << obj << " during baker collection\n";
}
if(!obj->reference_p()) return obj;
if(obj->zone != YoungObjectZone) return obj;
if(obj->forwarded_p()) return obj->forward();
// This object is already in the next space, we don't want to
// copy it again!
// TODO test this!
if(next->contains_p(obj)) return obj;
if(unlikely(obj->age++ >= lifetime)) {
copy = object_memory->promote_object(obj);
promoted_push(copy);
} else if(likely(next->enough_space_p(obj->size_in_bytes(object_memory->state)))) {
copy = next->copy_object(object_memory->state, obj);
total_objects++;
} else {
copy = object_memory->promote_object(obj);
promoted_push(copy);
}
if(watched_p(copy)) {
std::cout << "detected " << copy << " during baker collection (2)\n";
}
obj->set_forward(copy);
return copy;
}
