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Don't pin objects if we're just walking the heap

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Walking the heap can inadvertently pin objects.  Only mark the object's
pin bit if the mark_func_data pointer is NULL (similar to the mark bits)
This commit is contained in:
Aaron Patterson 2020-08-03 09:22:52 -07:00 committed by Aaron Patterson
parent 1d637b1f5e
commit 3dc313a239
Notes: git 2020-08-04 04:28:35 +09:00 
Merged: https://github.com/ruby/ruby/pull/3387
1 changed files with 3 additions and 1 deletions
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4
gc.c
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@ -5313,7 +5313,9 @@ gc_pin(rb_objspace_t *objspace, VALUE obj)
{
GC_ASSERT(is_markable_object(objspace, obj));
if (UNLIKELY(objspace->flags.during_compacting)) {
MARK_IN_BITMAP(GET_HEAP_PINNED_BITS(obj), obj);
if (LIKELY(objspace->mark_func_data == NULL)) {
MARK_IN_BITMAP(GET_HEAP_PINNED_BITS(obj), obj);
}
}
}