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Fix extent_recycle()'s cache-oblivious padding support.

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Add padding *after* computing the size class, so that the optimal size
class isn't skipped during search for a usable extent.  This regression
was caused by b46261d58b (Implement
cache-oblivious support for huge size classes.).
This commit is contained in:
Jason Evans 2016-11-03 21:14:59 -07:00
parent ea9961acdb
commit 4a7852137d
1 changed files with 6 additions and 5 deletions
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11
src/extent.c
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@ -427,12 +427,13 @@ extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
assert(prev == NULL || extent_past_get(prev) == new_addr);
}
size = usize + pad;
alloc_size = (new_addr != NULL) ? size : s2u(size +
PAGE_CEILING(alignment) - PAGE);
/* Beware size_t wrap-around. */
if (alloc_size < usize)
alloc_size = ((new_addr != NULL) ? usize : s2u(usize +
PAGE_CEILING(alignment) - PAGE)) + pad;
if (alloc_size > LARGE_MAXCLASS + pad || alloc_size < usize) {
/* Too large, possibly wrapped around. */
return (NULL);
}
size = usize + pad;
if (!locked)
malloc_mutex_lock(tsdn, &arena->extents_mtx);
extent_hooks_assure_initialized(arena, r_extent_hooks);