diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arena.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/arena.c b/src/arena.c index a053adf..a3f36b3 100644 --- a/src/arena.c +++ b/src/arena.c @@ -2175,9 +2175,20 @@ arena_palloc(tsd_t *tsd, arena_t *arena, size_t usize, size_t alignment, void *ret; if (usize <= SMALL_MAXCLASS && (alignment < PAGE || (alignment == PAGE - && (usize & PAGE_MASK) == 0))) + && (usize & PAGE_MASK) == 0))) { + /* Small; alignment doesn't require special run placement. */ ret = arena_malloc(tsd, arena, usize, zero, tcache); - else { + } else if (usize <= arena_maxclass && alignment <= PAGE) { + /* + * Large; alignment doesn't require special run placement. + * However, the cached pointer may be at a random offset from + * the base of the run, so do some bit manipulation to retrieve + * the base. + */ + ret = arena_malloc(tsd, arena, usize, zero, tcache); + if (config_cache_oblivious) + ret = (void *)((uintptr_t)ret & ~PAGE_MASK); + } else { if (likely(usize <= arena_maxclass)) { ret = arena_palloc_large(tsd, arena, usize, alignment, zero); |