Fix opt_zero-triggered in-place huge reallocation zeroing.

Fix huge_ralloc_no_move_expand() to update the extent's zeroed attribute
based on the intersection of the previous value and that of the newly
merged trailing extent.
This commit is contained in:
Jason Evans 2016-05-17 17:12:13 -07:00
parent c7d5298027
commit a7fdcc8b09

View File

@ -262,19 +262,19 @@ huge_ralloc_no_move_expand(tsdn_t *tsdn, void *ptr, size_t oldsize,
malloc_mutex_unlock(tsdn, &arena->huge_mtx);
/*
* Copy zero into is_zeroed_chunk and pass the copy to chunk_alloc(), so
* that it is possible to make correct junk/zero fill decisions below.
* Use is_zeroed_chunk to detect whether the trailing memory is zeroed,
* update extent's zeroed field, and zero as necessary.
*/
is_zeroed_chunk = zero;
is_zeroed_chunk = false;
if (arena_chunk_ralloc_huge_expand(tsdn, arena, ptr, oldsize, usize,
&is_zeroed_chunk))
return (true);
malloc_mutex_lock(tsdn, &arena->huge_mtx);
/* Update the size of the huge allocation. */
huge_node_unset(ptr, node);
extent_node_size_set(node, usize);
extent_node_zeroed_set(node, extent_node_zeroed_get(node) &&
is_zeroed_chunk);
huge_node_reset(tsdn, ptr, node);
malloc_mutex_unlock(tsdn, &arena->huge_mtx);