vm: bugfix: cannot access vec during gc.

Let's have a field in struct vm_desc that keeps track of the
ftab size. The problem is when we do length_vec(vd->funvec) in
vm_desc_mark, we are in the middle of garbage collection.
The object's tag has a reachable bit which blows up the
type check.

* vm.c (struct vm_desc): New member, ftsz.
(vm_make_desc): Store the length of the function table
into ftsz.
(vm_desc_mark): Use the stored length as the loop bound;
do not access vd->funvec.

0 files changed, 0 insertions, 0 deletions