void lspace_compute_object_target(Collector* collector, Lspace* lspace)
{
void* dest_addr = lspace->heap_start;
unsigned int iterate_index = 0;
Partial_Reveal_Object* p_obj = lspace_get_first_marked_object(lspace, &iterate_index);
assert(!collector->rem_set);
collector->rem_set = free_set_pool_get_entry(collector->gc->metadata);
#ifdef USE_32BITS_HASHCODE
collector->hashcode_set = free_set_pool_get_entry(collector->gc->metadata);
#endif
#ifdef GC_GEN_STATS
GC_Gen_Collector_Stats* stats = (GC_Gen_Collector_Stats*)collector->stats;
#endif
while( p_obj ){
assert( obj_is_marked_in_vt(p_obj));
unsigned int obj_size = vm_object_size(p_obj);
#ifdef GC_GEN_STATS
gc_gen_collector_update_moved_los_obj_stats_major(stats, vm_object_size(p_obj));
#endif
assert(((POINTER_SIZE_INT)dest_addr + obj_size) <= (POINTER_SIZE_INT)lspace->heap_end);
#ifdef USE_32BITS_HASHCODE
obj_size += hashcode_is_attached(p_obj)? GC_OBJECT_ALIGNMENT : 0 ;
Obj_Info_Type obj_info = slide_compact_process_hashcode(p_obj, dest_addr, &obj_size, collector, null, null);
#else
Obj_Info_Type obj_info = get_obj_info_raw(p_obj);
#endif
if( obj_info != 0 ) {
collector_remset_add_entry(collector, (Partial_Reveal_Object **)dest_addr);
collector_remset_add_entry(collector, (Partial_Reveal_Object **)(POINTER_SIZE_INT)obj_info);
}
obj_set_fw_in_oi(p_obj, dest_addr);
dest_addr = (void *)ALIGN_UP_TO_KILO(((POINTER_SIZE_INT) dest_addr + obj_size));
p_obj = lspace_get_next_marked_object(lspace, &iterate_index);
}
pool_put_entry(collector->gc->metadata->collector_remset_pool, collector->rem_set);
collector->rem_set = NULL;
#ifdef USE_32BITS_HASHCODE
pool_put_entry(collector->gc->metadata->collector_hashcode_pool, collector->hashcode_set);
collector->hashcode_set = NULL;
#endif
lspace->scompact_fa_start = dest_addr;
lspace->scompact_fa_end= lspace->heap_end;
return;
}
inline Partial_Reveal_Object* lspace_get_next_object( Space* lspace, POINTER_SIZE_INT* & next_area_start){
POINTER_SIZE_INT* ret_obj = NULL;
while(((POINTER_SIZE_INT)next_area_start < (POINTER_SIZE_INT)lspace->heap_end)&&!*next_area_start ){
next_area_start =(POINTER_SIZE_INT*)((POINTER_SIZE_INT)next_area_start + ((Free_Area*)next_area_start)->size);
}
if((POINTER_SIZE_INT)next_area_start < (POINTER_SIZE_INT)lspace->heap_end){
ret_obj = next_area_start;
unsigned int hash_extend_size = 0;
#ifdef USE_32BITS_HASHCODE
hash_extend_size = (hashcode_is_attached((Partial_Reveal_Object*)next_area_start))?GC_OBJECT_ALIGNMENT:0;
#endif
POINTER_SIZE_INT obj_size = ALIGN_UP_TO_KILO(vm_object_size((Partial_Reveal_Object*)next_area_start) + hash_extend_size);
assert(obj_size);
next_area_start = (POINTER_SIZE_INT*)((POINTER_SIZE_INT)next_area_start + obj_size);
return (Partial_Reveal_Object*)ret_obj;
}else{
return NULL;
}
}
void lspace_sweep(Lspace* lspace)
{
TRACE2("gc.process", "GC: lspace sweep algo start ...\n");
#ifdef GC_GEN_STATS
GC_Gen_Stats* stats = ((GC_Gen*)lspace->gc)->stats;
gc_gen_stats_set_los_collected_flag((GC_Gen*)lspace->gc, true);
#endif
unsigned int mark_bit_idx = 0;
POINTER_SIZE_INT cur_size = 0;
void *cur_area_start, *cur_area_end;
free_area_pool_reset(lspace->free_pool);
Partial_Reveal_Object* p_prev_obj = (Partial_Reveal_Object *)lspace->heap_start;
Partial_Reveal_Object* p_next_obj = lspace_get_first_marked_object_by_oi(lspace, &mark_bit_idx);
if(p_next_obj){
// obj_unmark_in_vt(p_next_obj);
/*Fixme: This might not be necessary, for there is a bit clearing operation in forward_object->obj_mark_in_oi*/
obj_clear_dual_bits_in_oi(p_next_obj);
/*For_statistic: sum up the size of suvived large objects, useful to deciede los extention.*/
unsigned int obj_size = vm_object_size(p_next_obj);
#ifdef USE_32BITS_HASHCODE
obj_size += (hashcode_is_attached(p_next_obj))?GC_OBJECT_ALIGNMENT:0;
#endif
lspace->last_surviving_size += ALIGN_UP_TO_KILO(obj_size);
#ifdef GC_GEN_STATS
stats->los_suviving_obj_num++;
stats->los_suviving_obj_size += obj_size;
#endif
}
cur_area_start = (void*)ALIGN_UP_TO_KILO(p_prev_obj);
cur_area_end = (void*)ALIGN_DOWN_TO_KILO(p_next_obj);
unsigned int hash_extend_size = 0;
Free_Area* cur_area = NULL;
while(cur_area_end){
cur_area = NULL;
cur_size = (POINTER_SIZE_INT)cur_area_end - (POINTER_SIZE_INT)cur_area_start;
if(cur_size){
//debug
assert(cur_size >= KB);
cur_area = free_area_new(cur_area_start, cur_size);
if( cur_area ) free_pool_add_area(lspace->free_pool, cur_area);
}
/* successfully create an area */
p_prev_obj = p_next_obj;
p_next_obj = lspace_get_next_marked_object_by_oi(lspace, &mark_bit_idx);
if(p_next_obj){
// obj_unmark_in_vt(p_next_obj);
obj_clear_dual_bits_in_oi(p_next_obj);
/*For_statistic: sum up the size of suvived large objects, useful to deciede los extention.*/
unsigned int obj_size = vm_object_size(p_next_obj);
#ifdef USE_32BITS_HASHCODE
obj_size += (hashcode_is_attached(p_next_obj))?GC_OBJECT_ALIGNMENT:0;
#endif
lspace->last_surviving_size += ALIGN_UP_TO_KILO(obj_size);
#ifdef GC_GEN_STATS
stats->los_suviving_obj_num++;
stats->los_suviving_obj_size += obj_size;
#endif
}
#ifdef USE_32BITS_HASHCODE
hash_extend_size = (hashcode_is_attached((Partial_Reveal_Object*)p_prev_obj))?GC_OBJECT_ALIGNMENT:0;
#endif
cur_area_start = (void*)ALIGN_UP_TO_KILO((POINTER_SIZE_INT)p_prev_obj + vm_object_size(p_prev_obj) + hash_extend_size);
cur_area_end = (void*)ALIGN_DOWN_TO_KILO(p_next_obj);
}
/* cur_area_end == NULL */
cur_area_end = (void*)ALIGN_DOWN_TO_KILO(lspace->heap_end);
cur_size = (POINTER_SIZE_INT)cur_area_end - (POINTER_SIZE_INT)cur_area_start;
if(cur_size){
//debug
assert(cur_size >= KB);
cur_area = free_area_new(cur_area_start, cur_size);
if( cur_area ) free_pool_add_area(lspace->free_pool, cur_area);
}
mark_bit_idx = 0;
assert(!lspace_get_first_marked_object(lspace, &mark_bit_idx));
TRACE2("gc.process", "GC: end of lspace sweep algo ...\n");
return;
}
