Additional info for previous letter. This is how I am copying object
back to MOS[1]. And After that running fix_pointers (as in
move_compact but with minimal changes) it fails because of vt
corrupted. If fix_pointers routine is needed I could present it here.
[1]
void gc_layout_copy_to_mos(GC_Gen* gc)
{
char* obj_src = layout_mem_space; // from space
char* obj_dst = NULL;
Mspace* mos = (Mspace*)gc->mos; // to space
Partial_Reveal_Object *p_target_object = NULL, *p_obj = NULL;
unsigned obj_size = 0, hash_extend_size = 0;
unsigned long available_free_size_in_block = 0, free_block_index =
mos->free_block_idx;
// check for available free memory
unsigned mos_free_memory_size =
blocked_space_free_mem_size((Blocked_Space*)mos);
assert(mos_free_memory_size > layout_mem_space_size);
// iterate until free blocks starts
blocked_space_block_iterator_init((Blocked_Space*)mos); // ???
Block_Header* curr_block =
blocked_space_block_iterator_next((Blocked_Space*) mos);
while (curr_block->block_idx < free_block_index)
{
curr_block = blocked_space_block_iterator_next((Blocked_Space*) mos);
}
curr_block->free = curr_block->new_free;
// begin copying
while (obj_src < layout_mem_space + layout_mem_space_size) {
obj_dst = (char*)curr_block->free;
Partial_Reveal_Object* p_obj = LAYOUT_CONVERTION(obj_src);
#ifdef USE_32BITS_HASHCODE
hash_extend_size =
(hashcode_is_attached((Partial_Reveal_Object*)p_obj))?GC_OBJECT_ALIGNMENT:0;
#endif
//obj_size = vm_object_size(p_obj) + hash_extend_size; THIS
POINT SHOULD BE REVIEWED CAREFULLY
obj_size = gc_layout_get_obj_size(p_obj);
available_free_size_in_block =
(POINTER_SIZE_INT)GC_BLOCK_END(curr_block) -
(POINTER_SIZE_INT)curr_block->free;
if (available_free_size_in_block >= obj_size)
{
memcpy(obj_dst, obj_src, obj_size);
gc_layout_add_old_new_pair(get_old_by_middle(p_obj),
LAYOUT_CONVERTION(obj_dst)); // for fix pointers method needed
curr_block->free = (void*)((char*)curr_block->free +
obj_size); // now less free mem in block is available
obj_src += obj_size; // next object to copy
obj_mark_in_vt(LAYOUT_CONVERTION(obj_dst));
}
else
{
curr_block =
blocked_space_block_iterator_next((Blocked_Space*) mos); // no free
mem is available for this object, get next block
curr_block->free = curr_block->new_free;
}
}
}
--
Yuri S. Kashnikov
Novosibirsk State University, Russia
2 Pirogova street
630090, Novosibirsk-90
[EMAIL PROTECTED]
