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Add a comment about why we're checking the finalizer table

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Aaron Patterson 2020-09-22 09:19:42 -07:00
parent 3c80889802
commit f3dddd77a9
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gc.c
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@ -7861,6 +7861,11 @@ gc_is_moveable_obj(rb_objspace_t *objspace, VALUE obj)
case T_NODE:
case T_CLASS:
if (FL_TEST(obj, FL_FINALIZE)) {
/* The finalizer table is a numtable. It looks up objects by address.
* We can't mark the keys in the finalizer table because that would
* prevent the objects from being collected. This check prevents
* objects that are keys in the finalizer table from being moved
* without directly pinning them. */
if (st_is_member(finalizer_table, obj)) {
return FALSE;
}