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authorDJ Delorie <dj@redhat.com>2019-10-30 18:03:14 -0400
committerDJ Delorie <dj@redhat.com>2019-10-30 22:59:11 -0400
commitff12e0fb91b9072800f031cb21fb2651ee7b6251 (patch)
tree37a7d39ba65a800011cdef4ce0bfffe1b97871a1 /malloc
parent62193c4a3af9c1e15c039b323f45ccd2fddc119f (diff)
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Base max_fast on alignment, not width, of bins (Bug 24903)
set_max_fast sets the "impossibly small" value based on, eventually, MALLOC_ALIGNMENT. The comparisons for the smallest chunk used is, eventually, MIN_CHUNK_SIZE. Note that i386 is the only platform where these are the same, so a smallest chunk *would* be put in a no-fastbins fastbin. This change calculates the "impossibly small" value based on MIN_CHUNK_SIZE instead, so that we can know it will always be impossibly small.
Diffstat (limited to 'malloc')
-rw-r--r--malloc/malloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 5d3e82a..70cc35a 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1621,7 +1621,7 @@ static INTERNAL_SIZE_T global_max_fast;
#define set_max_fast(s) \
global_max_fast = (((s) == 0) \
- ? SMALLBIN_WIDTH : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK))
+ ? MIN_CHUNK_SIZE / 2 : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK))
static inline INTERNAL_SIZE_T
get_max_fast (void)